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Diffstat (limited to 'Documentation')
565 files changed, 84042 insertions, 0 deletions
diff --git a/Documentation/.gitattributes b/Documentation/.gitattributes new file mode 100644 index 0000000..ddb0301 --- /dev/null +++ b/Documentation/.gitattributes @@ -0,0 +1 @@ +*.txt whitespace diff --git a/Documentation/.gitignore b/Documentation/.gitignore new file mode 100644 index 0000000..2c8b2d6 --- /dev/null +++ b/Documentation/.gitignore @@ -0,0 +1,13 @@ +*.xml +*.html +*.[1-8] +*.made +*.texi +*.pdf +git.info +gitman.info +howto-index.txt +doc.dep +cmds-*.txt +mergetools-*.txt +manpage-base-url.xsl diff --git a/Documentation/CodingGuidelines b/Documentation/CodingGuidelines new file mode 100644 index 0000000..0ddd368 --- /dev/null +++ b/Documentation/CodingGuidelines @@ -0,0 +1,549 @@ +Like other projects, we also have some guidelines to keep to the +code. For Git in general, a few rough rules are: + + - Most importantly, we never say "It's in POSIX; we'll happily + ignore your needs should your system not conform to it." + We live in the real world. + + - However, we often say "Let's stay away from that construct, + it's not even in POSIX". + + - In spite of the above two rules, we sometimes say "Although + this is not in POSIX, it (is so convenient | makes the code + much more readable | has other good characteristics) and + practically all the platforms we care about support it, so + let's use it". + + Again, we live in the real world, and it is sometimes a + judgement call, the decision based more on real world + constraints people face than what the paper standard says. + + - Fixing style violations while working on a real change as a + preparatory clean-up step is good, but otherwise avoid useless code + churn for the sake of conforming to the style. + + "Once it _is_ in the tree, it's not really worth the patch noise to + go and fix it up." + Cf. http://article.gmane.org/gmane.linux.kernel/943020 + +Make your code readable and sensible, and don't try to be clever. + +As for more concrete guidelines, just imitate the existing code +(this is a good guideline, no matter which project you are +contributing to). It is always preferable to match the _local_ +convention. New code added to Git suite is expected to match +the overall style of existing code. Modifications to existing +code is expected to match the style the surrounding code already +uses (even if it doesn't match the overall style of existing code). + +But if you must have a list of rules, here they are. + +For shell scripts specifically (not exhaustive): + + - We use tabs for indentation. + + - Case arms are indented at the same depth as case and esac lines, + like this: + + case "$variable" in + pattern1) + do this + ;; + pattern2) + do that + ;; + esac + + - Redirection operators should be written with space before, but no + space after them. In other words, write 'echo test >"$file"' + instead of 'echo test> $file' or 'echo test > $file'. Note that + even though it is not required by POSIX to double-quote the + redirection target in a variable (as shown above), our code does so + because some versions of bash issue a warning without the quotes. + + (incorrect) + cat hello > world < universe + echo hello >$world + + (correct) + cat hello >world <universe + echo hello >"$world" + + - We prefer $( ... ) for command substitution; unlike ``, it + properly nests. It should have been the way Bourne spelled + it from day one, but unfortunately isn't. + + - If you want to find out if a command is available on the user's + $PATH, you should use 'type <command>', instead of 'which <command>'. + The output of 'which' is not machine parseable and its exit code + is not reliable across platforms. + + - We use POSIX compliant parameter substitutions and avoid bashisms; + namely: + + - We use ${parameter-word} and its [-=?+] siblings, and their + colon'ed "unset or null" form. + + - We use ${parameter#word} and its [#%] siblings, and their + doubled "longest matching" form. + + - No "Substring Expansion" ${parameter:offset:length}. + + - No shell arrays. + + - No strlen ${#parameter}. + + - No pattern replacement ${parameter/pattern/string}. + + - We use Arithmetic Expansion $(( ... )). + + - Inside Arithmetic Expansion, spell shell variables with $ in front + of them, as some shells do not grok $((x)) while accepting $(($x)) + just fine (e.g. dash older than 0.5.4). + + - We do not use Process Substitution <(list) or >(list). + + - Do not write control structures on a single line with semicolon. + "then" should be on the next line for if statements, and "do" + should be on the next line for "while" and "for". + + (incorrect) + if test -f hello; then + do this + fi + + (correct) + if test -f hello + then + do this + fi + + - We prefer "test" over "[ ... ]". + + - We do not write the noiseword "function" in front of shell + functions. + + - We prefer a space between the function name and the parentheses, + and no space inside the parentheses. The opening "{" should also + be on the same line. + + (incorrect) + my_function(){ + ... + + (correct) + my_function () { + ... + + - As to use of grep, stick to a subset of BRE (namely, no \{m,n\}, + [::], [==], or [..]) for portability. + + - We do not use \{m,n\}; + + - We do not use -E; + + - We do not use ? or + (which are \{0,1\} and \{1,\} + respectively in BRE) but that goes without saying as these + are ERE elements not BRE (note that \? and \+ are not even part + of BRE -- making them accessible from BRE is a GNU extension). + + - Use Git's gettext wrappers in git-sh-i18n to make the user + interface translatable. See "Marking strings for translation" in + po/README. + + - We do not write our "test" command with "-a" and "-o" and use "&&" + or "||" to concatenate multiple "test" commands instead, because + the use of "-a/-o" is often error-prone. E.g. + + test -n "$x" -a "$a" = "$b" + + is buggy and breaks when $x is "=", but + + test -n "$x" && test "$a" = "$b" + + does not have such a problem. + + +For C programs: + + - We use tabs to indent, and interpret tabs as taking up to + 8 spaces. + + - We try to keep to at most 80 characters per line. + + - As a Git developer we assume you have a reasonably modern compiler + and we recommend you to enable the DEVELOPER makefile knob to + ensure your patch is clear of all compiler warnings we care about, + by e.g. "echo DEVELOPER=1 >>config.mak". + + - We try to support a wide range of C compilers to compile Git with, + including old ones. That means that you should not use C99 + initializers, even if a lot of compilers grok it. + + - Variables have to be declared at the beginning of the block. + + - NULL pointers shall be written as NULL, not as 0. + + - When declaring pointers, the star sides with the variable + name, i.e. "char *string", not "char* string" or + "char * string". This makes it easier to understand code + like "char *string, c;". + + - Use whitespace around operators and keywords, but not inside + parentheses and not around functions. So: + + while (condition) + func(bar + 1); + + and not: + + while( condition ) + func (bar+1); + + - We avoid using braces unnecessarily. I.e. + + if (bla) { + x = 1; + } + + is frowned upon. A gray area is when the statement extends + over a few lines, and/or you have a lengthy comment atop of + it. Also, like in the Linux kernel, if there is a long list + of "else if" statements, it can make sense to add braces to + single line blocks. + + - We try to avoid assignments in the condition of an "if" statement. + + - Try to make your code understandable. You may put comments + in, but comments invariably tend to stale out when the code + they were describing changes. Often splitting a function + into two makes the intention of the code much clearer. + + - Multi-line comments include their delimiters on separate lines from + the text. E.g. + + /* + * A very long + * multi-line comment. + */ + + Note however that a comment that explains a translatable string to + translators uses a convention of starting with a magic token + "TRANSLATORS: " immediately after the opening delimiter, even when + it spans multiple lines. We do not add an asterisk at the beginning + of each line, either. E.g. + + /* TRANSLATORS: here is a comment that explains the string + to be translated, that follows immediately after it */ + _("Here is a translatable string explained by the above."); + + - Double negation is often harder to understand than no negation + at all. + + - There are two schools of thought when it comes to comparison, + especially inside a loop. Some people prefer to have the less stable + value on the left hand side and the more stable value on the right hand + side, e.g. if you have a loop that counts variable i down to the + lower bound, + + while (i > lower_bound) { + do something; + i--; + } + + Other people prefer to have the textual order of values match the + actual order of values in their comparison, so that they can + mentally draw a number line from left to right and place these + values in order, i.e. + + while (lower_bound < i) { + do something; + i--; + } + + Both are valid, and we use both. However, the more "stable" the + stable side becomes, the more we tend to prefer the former + (comparison with a constant, "i > 0", is an extreme example). + Just do not mix styles in the same part of the code and mimic + existing styles in the neighbourhood. + + - There are two schools of thought when it comes to splitting a long + logical line into multiple lines. Some people push the second and + subsequent lines far enough to the right with tabs and align them: + + if (the_beginning_of_a_very_long_expression_that_has_to || + span_more_than_a_single_line_of || + the_source_text) { + ... + + while other people prefer to align the second and the subsequent + lines with the column immediately inside the opening parenthesis, + with tabs and spaces, following our "tabstop is always a multiple + of 8" convention: + + if (the_beginning_of_a_very_long_expression_that_has_to || + span_more_than_a_single_line_of || + the_source_text) { + ... + + Both are valid, and we use both. Again, just do not mix styles in + the same part of the code and mimic existing styles in the + neighbourhood. + + - When splitting a long logical line, some people change line before + a binary operator, so that the result looks like a parse tree when + you turn your head 90-degrees counterclockwise: + + if (the_beginning_of_a_very_long_expression_that_has_to + || span_more_than_a_single_line_of_the_source_text) { + + while other people prefer to leave the operator at the end of the + line: + + if (the_beginning_of_a_very_long_expression_that_has_to || + span_more_than_a_single_line_of_the_source_text) { + + Both are valid, but we tend to use the latter more, unless the + expression gets fairly complex, in which case the former tends to + be easier to read. Again, just do not mix styles in the same part + of the code and mimic existing styles in the neighbourhood. + + - When splitting a long logical line, with everything else being + equal, it is preferable to split after the operator at higher + level in the parse tree. That is, this is more preferable: + + if (a_very_long_variable * that_is_used_in + + a_very_long_expression) { + ... + + than + + if (a_very_long_variable * + that_is_used_in + a_very_long_expression) { + ... + + - Some clever tricks, like using the !! operator with arithmetic + constructs, can be extremely confusing to others. Avoid them, + unless there is a compelling reason to use them. + + - Use the API. No, really. We have a strbuf (variable length + string), several arrays with the ALLOC_GROW() macro, a + string_list for sorted string lists, a hash map (mapping struct + objects) named "struct decorate", amongst other things. + + - When you come up with an API, document it. + + - The first #include in C files, except in platform specific compat/ + implementations, must be either "git-compat-util.h", "cache.h" or + "builtin.h". You do not have to include more than one of these. + + - A C file must directly include the header files that declare the + functions and the types it uses, except for the functions and types + that are made available to it by including one of the header files + it must include by the previous rule. + + - If you are planning a new command, consider writing it in shell + or perl first, so that changes in semantics can be easily + changed and discussed. Many Git commands started out like + that, and a few are still scripts. + + - Avoid introducing a new dependency into Git. This means you + usually should stay away from scripting languages not already + used in the Git core command set (unless your command is clearly + separate from it, such as an importer to convert random-scm-X + repositories to Git). + + - When we pass <string, length> pair to functions, we should try to + pass them in that order. + + - Use Git's gettext wrappers to make the user interface + translatable. See "Marking strings for translation" in po/README. + +For Perl programs: + + - Most of the C guidelines above apply. + + - We try to support Perl 5.8 and later ("use Perl 5.008"). + + - use strict and use warnings are strongly preferred. + + - Don't overuse statement modifiers unless using them makes the + result easier to follow. + + ... do something ... + do_this() unless (condition); + ... do something else ... + + is more readable than: + + ... do something ... + unless (condition) { + do_this(); + } + ... do something else ... + + *only* when the condition is so rare that do_this() will be almost + always called. + + - We try to avoid assignments inside "if ()" conditions. + + - Learn and use Git.pm if you need that functionality. + + - For Emacs, it's useful to put the following in + GIT_CHECKOUT/.dir-locals.el, assuming you use cperl-mode: + + ;; note the first part is useful for C editing, too + ((nil . ((indent-tabs-mode . t) + (tab-width . 8) + (fill-column . 80))) + (cperl-mode . ((cperl-indent-level . 8) + (cperl-extra-newline-before-brace . nil) + (cperl-merge-trailing-else . t)))) + +For Python scripts: + + - We follow PEP-8 (http://www.python.org/dev/peps/pep-0008/). + + - As a minimum, we aim to be compatible with Python 2.6 and 2.7. + + - Where required libraries do not restrict us to Python 2, we try to + also be compatible with Python 3.1 and later. + + - When you must differentiate between Unicode literals and byte string + literals, it is OK to use the 'b' prefix. Even though the Python + documentation for version 2.6 does not mention this prefix, it has + been supported since version 2.6.0. + +Error Messages + + - Do not end error messages with a full stop. + + - Do not capitalize ("unable to open %s", not "Unable to open %s") + + - Say what the error is first ("cannot open %s", not "%s: cannot open") + + +Externally Visible Names + + - For configuration variable names, follow the existing convention: + + . The section name indicates the affected subsystem. + + . The subsection name, if any, indicates which of an unbounded set + of things to set the value for. + + . The variable name describes the effect of tweaking this knob. + + The section and variable names that consist of multiple words are + formed by concatenating the words without punctuations (e.g. `-`), + and are broken using bumpyCaps in documentation as a hint to the + reader. + + When choosing the variable namespace, do not use variable name for + specifying possibly unbounded set of things, most notably anything + an end user can freely come up with (e.g. branch names). Instead, + use subsection names or variable values, like the existing variable + branch.<name>.description does. + + +Writing Documentation: + + Most (if not all) of the documentation pages are written in the + AsciiDoc format in *.txt files (e.g. Documentation/git.txt), and + processed into HTML and manpages (e.g. git.html and git.1 in the + same directory). + + The documentation liberally mixes US and UK English (en_US/UK) + norms for spelling and grammar, which is somewhat unfortunate. + In an ideal world, it would have been better if it consistently + used only one and not the other, and we would have picked en_US + (if you wish to correct the English of some of the existing + documentation, please see the documentation-related advice in the + Documentation/SubmittingPatches file). + + Every user-visible change should be reflected in the documentation. + The same general rule as for code applies -- imitate the existing + conventions. + + A few commented examples follow to provide reference when writing or + modifying command usage strings and synopsis sections in the manual + pages: + + Placeholders are spelled in lowercase and enclosed in angle brackets: + <file> + --sort=<key> + --abbrev[=<n>] + + If a placeholder has multiple words, they are separated by dashes: + <new-branch-name> + --template=<template-directory> + + Possibility of multiple occurrences is indicated by three dots: + <file>... + (One or more of <file>.) + + Optional parts are enclosed in square brackets: + [<extra>] + (Zero or one <extra>.) + + --exec-path[=<path>] + (Option with an optional argument. Note that the "=" is inside the + brackets.) + + [<patch>...] + (Zero or more of <patch>. Note that the dots are inside, not + outside the brackets.) + + Multiple alternatives are indicated with vertical bars: + [-q | --quiet] + [--utf8 | --no-utf8] + + Parentheses are used for grouping: + [(<rev> | <range>)...] + (Any number of either <rev> or <range>. Parens are needed to make + it clear that "..." pertains to both <rev> and <range>.) + + [(-p <parent>)...] + (Any number of option -p, each with one <parent> argument.) + + git remote set-head <name> (-a | -d | <branch>) + (One and only one of "-a", "-d" or "<branch>" _must_ (no square + brackets) be provided.) + + And a somewhat more contrived example: + --diff-filter=[(A|C|D|M|R|T|U|X|B)...[*]] + Here "=" is outside the brackets, because "--diff-filter=" is a + valid usage. "*" has its own pair of brackets, because it can + (optionally) be specified only when one or more of the letters is + also provided. + + A note on notation: + Use 'git' (all lowercase) when talking about commands i.e. something + the user would type into a shell and use 'Git' (uppercase first letter) + when talking about the version control system and its properties. + + A few commented examples follow to provide reference when writing or + modifying paragraphs or option/command explanations that contain options + or commands: + + Literal examples (e.g. use of command-line options, command names, and + configuration variables) are typeset in monospace, and if you can use + `backticks around word phrases`, do so. + `--pretty=oneline` + `git rev-list` + `remote.pushDefault` + + Word phrases enclosed in `backtick characters` are rendered literally + and will not be further expanded. The use of `backticks` to achieve the + previous rule means that literal examples should not use AsciiDoc + escapes. + Correct: + `--pretty=oneline` + Incorrect: + `\--pretty=oneline` + + If some place in the documentation needs to typeset a command usage + example with inline substitutions, it is fine to use +monospaced and + inline substituted text+ instead of `monospaced literal text`, and with + the former, the part that should not get substituted must be + quoted/escaped. diff --git a/Documentation/Makefile b/Documentation/Makefile new file mode 100644 index 0000000..3e39e28 --- /dev/null +++ b/Documentation/Makefile @@ -0,0 +1,430 @@ +# Guard against environment variables +MAN1_TXT = +MAN5_TXT = +MAN7_TXT = +TECH_DOCS = +ARTICLES = +SP_ARTICLES = +OBSOLETE_HTML = + +MAN1_TXT += $(filter-out \ + $(addsuffix .txt, $(ARTICLES) $(SP_ARTICLES)), \ + $(wildcard git-*.txt)) +MAN1_TXT += git.txt +MAN1_TXT += gitk.txt +MAN1_TXT += gitremote-helpers.txt +MAN1_TXT += gitweb.txt + +MAN5_TXT += gitattributes.txt +MAN5_TXT += githooks.txt +MAN5_TXT += gitignore.txt +MAN5_TXT += gitmodules.txt +MAN5_TXT += gitrepository-layout.txt +MAN5_TXT += gitweb.conf.txt + +MAN7_TXT += gitcli.txt +MAN7_TXT += gitcore-tutorial.txt +MAN7_TXT += gitcredentials.txt +MAN7_TXT += gitcvs-migration.txt +MAN7_TXT += gitdiffcore.txt +MAN7_TXT += giteveryday.txt +MAN7_TXT += gitglossary.txt +MAN7_TXT += gitnamespaces.txt +MAN7_TXT += gitrevisions.txt +MAN7_TXT += gittutorial-2.txt +MAN7_TXT += gittutorial.txt +MAN7_TXT += gitworkflows.txt + +MAN_TXT = $(MAN1_TXT) $(MAN5_TXT) $(MAN7_TXT) +MAN_XML = $(patsubst %.txt,%.xml,$(MAN_TXT)) +MAN_HTML = $(patsubst %.txt,%.html,$(MAN_TXT)) + +OBSOLETE_HTML += everyday.html +OBSOLETE_HTML += git-remote-helpers.html +DOC_HTML = $(MAN_HTML) $(OBSOLETE_HTML) + +ARTICLES += howto-index +ARTICLES += git-tools +ARTICLES += git-bisect-lk2009 +# with their own formatting rules. +SP_ARTICLES += user-manual +SP_ARTICLES += howto/new-command +SP_ARTICLES += howto/revert-branch-rebase +SP_ARTICLES += howto/using-merge-subtree +SP_ARTICLES += howto/using-signed-tag-in-pull-request +SP_ARTICLES += howto/use-git-daemon +SP_ARTICLES += howto/update-hook-example +SP_ARTICLES += howto/setup-git-server-over-http +SP_ARTICLES += howto/separating-topic-branches +SP_ARTICLES += howto/revert-a-faulty-merge +SP_ARTICLES += howto/recover-corrupted-blob-object +SP_ARTICLES += howto/recover-corrupted-object-harder +SP_ARTICLES += howto/rebuild-from-update-hook +SP_ARTICLES += howto/rebase-from-internal-branch +SP_ARTICLES += howto/keep-canonical-history-correct +SP_ARTICLES += howto/maintain-git +API_DOCS = $(patsubst %.txt,%,$(filter-out technical/api-index-skel.txt technical/api-index.txt, $(wildcard technical/api-*.txt))) +SP_ARTICLES += $(API_DOCS) + +TECH_DOCS += technical/http-protocol +TECH_DOCS += technical/index-format +TECH_DOCS += technical/pack-format +TECH_DOCS += technical/pack-heuristics +TECH_DOCS += technical/pack-protocol +TECH_DOCS += technical/protocol-capabilities +TECH_DOCS += technical/protocol-common +TECH_DOCS += technical/racy-git +TECH_DOCS += technical/send-pack-pipeline +TECH_DOCS += technical/shallow +TECH_DOCS += technical/trivial-merge +SP_ARTICLES += $(TECH_DOCS) +SP_ARTICLES += technical/api-index + +DOC_HTML += $(patsubst %,%.html,$(ARTICLES) $(SP_ARTICLES)) + +DOC_MAN1 = $(patsubst %.txt,%.1,$(MAN1_TXT)) +DOC_MAN5 = $(patsubst %.txt,%.5,$(MAN5_TXT)) +DOC_MAN7 = $(patsubst %.txt,%.7,$(MAN7_TXT)) + +prefix ?= $(HOME) +bindir ?= $(prefix)/bin +htmldir ?= $(prefix)/share/doc/git-doc +infodir ?= $(prefix)/share/info +pdfdir ?= $(prefix)/share/doc/git-doc +mandir ?= $(prefix)/share/man +man1dir = $(mandir)/man1 +man5dir = $(mandir)/man5 +man7dir = $(mandir)/man7 +# DESTDIR = + +ASCIIDOC = asciidoc +ASCIIDOC_EXTRA = +ASCIIDOC_HTML = xhtml11 +ASCIIDOC_DOCBOOK = docbook +ASCIIDOC_CONF = -f asciidoc.conf +ASCIIDOC_COMMON = $(ASCIIDOC) $(ASCIIDOC_EXTRA) $(ASCIIDOC_CONF) \ + -agit_version=$(GIT_VERSION) +TXT_TO_HTML = $(ASCIIDOC_COMMON) -b $(ASCIIDOC_HTML) +TXT_TO_XML = $(ASCIIDOC_COMMON) -b $(ASCIIDOC_DOCBOOK) +MANPAGE_XSL = manpage-normal.xsl +XMLTO = xmlto +XMLTO_EXTRA = +INSTALL ?= install +RM ?= rm -f +MAN_REPO = ../../git-manpages +HTML_REPO = ../../git-htmldocs + +MAKEINFO = makeinfo +INSTALL_INFO = install-info +DOCBOOK2X_TEXI = docbook2x-texi +DBLATEX = dblatex +ASCIIDOC_DBLATEX_DIR = /etc/asciidoc/dblatex +ifndef PERL_PATH + PERL_PATH = /usr/bin/perl +endif + +-include ../config.mak.autogen +-include ../config.mak + +# +# For docbook-xsl ... +# -1.68.1, no extra settings are needed? +# 1.69.0, set ASCIIDOC_ROFF? +# 1.69.1-1.71.0, set DOCBOOK_SUPPRESS_SP? +# 1.71.1, set ASCIIDOC_ROFF? +# 1.72.0, set DOCBOOK_XSL_172. +# 1.73.0-, no extra settings are needed +# + +ifdef DOCBOOK_XSL_172 +ASCIIDOC_EXTRA += -a git-asciidoc-no-roff +MANPAGE_XSL = manpage-1.72.xsl +else + ifndef ASCIIDOC_ROFF + # docbook-xsl after 1.72 needs the regular XSL, but will not + # pass-thru raw roff codes from asciidoc.conf, so turn them off. + ASCIIDOC_EXTRA += -a git-asciidoc-no-roff + endif +endif +ifdef MAN_BOLD_LITERAL +XMLTO_EXTRA += -m manpage-bold-literal.xsl +endif +ifdef DOCBOOK_SUPPRESS_SP +XMLTO_EXTRA += -m manpage-suppress-sp.xsl +endif + +# Newer DocBook stylesheet emits warning cruft in the output when +# this is not set, and if set it shows an absolute link. Older +# stylesheets simply ignore this parameter. +# +# Distros may want to use MAN_BASE_URL=file:///path/to/git/docs/ +# or similar. +ifndef MAN_BASE_URL +MAN_BASE_URL = file://$(htmldir)/ +endif +XMLTO_EXTRA += -m manpage-base-url.xsl + +# If your target system uses GNU groff, it may try to render +# apostrophes as a "pretty" apostrophe using unicode. This breaks +# cut&paste, so you should set GNU_ROFF to force them to be ASCII +# apostrophes. Unfortunately does not work with non-GNU roff. +ifdef GNU_ROFF +XMLTO_EXTRA += -m manpage-quote-apos.xsl +endif + +SHELL_PATH ?= $(SHELL) +# Shell quote; +SHELL_PATH_SQ = $(subst ','\'',$(SHELL_PATH)) + +ifdef DEFAULT_PAGER +DEFAULT_PAGER_SQ = $(subst ','\'',$(DEFAULT_PAGER)) +ASCIIDOC_EXTRA += -a 'git-default-pager=$(DEFAULT_PAGER_SQ)' +endif + +ifdef DEFAULT_EDITOR +DEFAULT_EDITOR_SQ = $(subst ','\'',$(DEFAULT_EDITOR)) +ASCIIDOC_EXTRA += -a 'git-default-editor=$(DEFAULT_EDITOR_SQ)' +endif + +QUIET_SUBDIR0 = +$(MAKE) -C # space to separate -C and subdir +QUIET_SUBDIR1 = + +ifneq ($(findstring $(MAKEFLAGS),w),w) +PRINT_DIR = --no-print-directory +else # "make -w" +NO_SUBDIR = : +endif + +ifneq ($(findstring $(MAKEFLAGS),s),s) +ifndef V + QUIET_ASCIIDOC = @echo ' ' ASCIIDOC $@; + QUIET_XMLTO = @echo ' ' XMLTO $@; + QUIET_DB2TEXI = @echo ' ' DB2TEXI $@; + QUIET_MAKEINFO = @echo ' ' MAKEINFO $@; + QUIET_DBLATEX = @echo ' ' DBLATEX $@; + QUIET_XSLTPROC = @echo ' ' XSLTPROC $@; + QUIET_GEN = @echo ' ' GEN $@; + QUIET_STDERR = 2> /dev/null + QUIET_SUBDIR0 = +@subdir= + QUIET_SUBDIR1 = ;$(NO_SUBDIR) echo ' ' SUBDIR $$subdir; \ + $(MAKE) $(PRINT_DIR) -C $$subdir + export V +endif +endif + +all: html man + +html: $(DOC_HTML) + +man: man1 man5 man7 +man1: $(DOC_MAN1) +man5: $(DOC_MAN5) +man7: $(DOC_MAN7) + +info: git.info gitman.info + +pdf: user-manual.pdf + +install: install-man + +install-man: man + $(INSTALL) -d -m 755 $(DESTDIR)$(man1dir) + $(INSTALL) -d -m 755 $(DESTDIR)$(man5dir) + $(INSTALL) -d -m 755 $(DESTDIR)$(man7dir) + $(INSTALL) -m 644 $(DOC_MAN1) $(DESTDIR)$(man1dir) + $(INSTALL) -m 644 $(DOC_MAN5) $(DESTDIR)$(man5dir) + $(INSTALL) -m 644 $(DOC_MAN7) $(DESTDIR)$(man7dir) + +install-info: info + $(INSTALL) -d -m 755 $(DESTDIR)$(infodir) + $(INSTALL) -m 644 git.info gitman.info $(DESTDIR)$(infodir) + if test -r $(DESTDIR)$(infodir)/dir; then \ + $(INSTALL_INFO) --info-dir=$(DESTDIR)$(infodir) git.info ;\ + $(INSTALL_INFO) --info-dir=$(DESTDIR)$(infodir) gitman.info ;\ + else \ + echo "No directory found in $(DESTDIR)$(infodir)" >&2 ; \ + fi + +install-pdf: pdf + $(INSTALL) -d -m 755 $(DESTDIR)$(pdfdir) + $(INSTALL) -m 644 user-manual.pdf $(DESTDIR)$(pdfdir) + +install-html: html + '$(SHELL_PATH_SQ)' ./install-webdoc.sh $(DESTDIR)$(htmldir) + +../GIT-VERSION-FILE: FORCE + $(QUIET_SUBDIR0)../ $(QUIET_SUBDIR1) GIT-VERSION-FILE + +-include ../GIT-VERSION-FILE + +# +# Determine "include::" file references in asciidoc files. +# +docdep_prereqs = \ + mergetools-list.made $(mergetools_txt) \ + cmd-list.made $(cmds_txt) + +doc.dep : $(docdep_prereqs) $(wildcard *.txt) build-docdep.perl + $(QUIET_GEN)$(RM) $@+ $@ && \ + $(PERL_PATH) ./build-docdep.perl >$@+ $(QUIET_STDERR) && \ + mv $@+ $@ + +-include doc.dep + +cmds_txt = cmds-ancillaryinterrogators.txt \ + cmds-ancillarymanipulators.txt \ + cmds-mainporcelain.txt \ + cmds-plumbinginterrogators.txt \ + cmds-plumbingmanipulators.txt \ + cmds-synchingrepositories.txt \ + cmds-synchelpers.txt \ + cmds-purehelpers.txt \ + cmds-foreignscminterface.txt + +$(cmds_txt): cmd-list.made + +cmd-list.made: cmd-list.perl ../command-list.txt $(MAN1_TXT) + $(QUIET_GEN)$(RM) $@ && \ + $(PERL_PATH) ./cmd-list.perl ../command-list.txt $(QUIET_STDERR) && \ + date >$@ + +mergetools_txt = mergetools-diff.txt mergetools-merge.txt + +$(mergetools_txt): mergetools-list.made + +mergetools-list.made: ../git-mergetool--lib.sh $(wildcard ../mergetools/*) + $(QUIET_GEN)$(RM) $@ && \ + $(SHELL_PATH) -c 'MERGE_TOOLS_DIR=../mergetools && \ + . ../git-mergetool--lib.sh && \ + show_tool_names can_diff "* " || :' >mergetools-diff.txt && \ + $(SHELL_PATH) -c 'MERGE_TOOLS_DIR=../mergetools && \ + . ../git-mergetool--lib.sh && \ + show_tool_names can_merge "* " || :' >mergetools-merge.txt && \ + date >$@ + +clean: + $(RM) *.xml *.xml+ *.html *.html+ *.1 *.5 *.7 + $(RM) *.texi *.texi+ *.texi++ git.info gitman.info + $(RM) *.pdf + $(RM) howto-index.txt howto/*.html doc.dep + $(RM) technical/*.html technical/api-index.txt + $(RM) $(cmds_txt) $(mergetools_txt) *.made + $(RM) manpage-base-url.xsl + +$(MAN_HTML): %.html : %.txt asciidoc.conf + $(QUIET_ASCIIDOC)$(RM) $@+ $@ && \ + $(TXT_TO_HTML) -d manpage -o $@+ $< && \ + mv $@+ $@ + +$(OBSOLETE_HTML): %.html : %.txto asciidoc.conf + $(QUIET_ASCIIDOC)$(RM) $@+ $@ && \ + $(TXT_TO_HTML) -o $@+ $< && \ + mv $@+ $@ + +manpage-base-url.xsl: manpage-base-url.xsl.in + sed "s|@@MAN_BASE_URL@@|$(MAN_BASE_URL)|" $< > $@ + +%.1 %.5 %.7 : %.xml manpage-base-url.xsl + $(QUIET_XMLTO)$(RM) $@ && \ + $(XMLTO) -m $(MANPAGE_XSL) $(XMLTO_EXTRA) man $< + +%.xml : %.txt asciidoc.conf + $(QUIET_ASCIIDOC)$(RM) $@+ $@ && \ + $(TXT_TO_XML) -d manpage -o $@+ $< && \ + mv $@+ $@ + +user-manual.xml: user-manual.txt user-manual.conf + $(QUIET_ASCIIDOC)$(RM) $@+ $@ && \ + $(TXT_TO_XML) -d article -o $@+ $< && \ + mv $@+ $@ + +technical/api-index.txt: technical/api-index-skel.txt \ + technical/api-index.sh $(patsubst %,%.txt,$(API_DOCS)) + $(QUIET_GEN)cd technical && '$(SHELL_PATH_SQ)' ./api-index.sh + +technical/%.html: ASCIIDOC_EXTRA += -a git-relative-html-prefix=../ +$(patsubst %,%.html,$(API_DOCS) technical/api-index $(TECH_DOCS)): %.html : %.txt asciidoc.conf + $(QUIET_ASCIIDOC)$(TXT_TO_HTML) $*.txt + +XSLT = docbook.xsl +XSLTOPTS = --xinclude --stringparam html.stylesheet docbook-xsl.css + +user-manual.html: user-manual.xml $(XSLT) + $(QUIET_XSLTPROC)$(RM) $@+ $@ && \ + xsltproc $(XSLTOPTS) -o $@+ $(XSLT) $< && \ + mv $@+ $@ + +git.info: user-manual.texi + $(QUIET_MAKEINFO)$(MAKEINFO) --no-split -o $@ user-manual.texi + +user-manual.texi: user-manual.xml + $(QUIET_DB2TEXI)$(RM) $@+ $@ && \ + $(DOCBOOK2X_TEXI) user-manual.xml --encoding=UTF-8 --to-stdout >$@++ && \ + $(PERL_PATH) fix-texi.perl <$@++ >$@+ && \ + rm $@++ && \ + mv $@+ $@ + +user-manual.pdf: user-manual.xml + $(QUIET_DBLATEX)$(RM) $@+ $@ && \ + $(DBLATEX) -o $@+ -p $(ASCIIDOC_DBLATEX_DIR)/asciidoc-dblatex.xsl -s $(ASCIIDOC_DBLATEX_DIR)/asciidoc-dblatex.sty $< && \ + mv $@+ $@ + +gitman.texi: $(MAN_XML) cat-texi.perl + $(QUIET_DB2TEXI)$(RM) $@+ $@ && \ + ($(foreach xml,$(MAN_XML),$(DOCBOOK2X_TEXI) --encoding=UTF-8 \ + --to-stdout $(xml) &&) true) > $@++ && \ + $(PERL_PATH) cat-texi.perl $@ <$@++ >$@+ && \ + rm $@++ && \ + mv $@+ $@ + +gitman.info: gitman.texi + $(QUIET_MAKEINFO)$(MAKEINFO) --no-split --no-validate $*.texi + +$(patsubst %.txt,%.texi,$(MAN_TXT)): %.texi : %.xml + $(QUIET_DB2TEXI)$(RM) $@+ $@ && \ + $(DOCBOOK2X_TEXI) --to-stdout $*.xml >$@+ && \ + mv $@+ $@ + +howto-index.txt: howto-index.sh $(wildcard howto/*.txt) + $(QUIET_GEN)$(RM) $@+ $@ && \ + '$(SHELL_PATH_SQ)' ./howto-index.sh $(sort $(wildcard howto/*.txt)) >$@+ && \ + mv $@+ $@ + +$(patsubst %,%.html,$(ARTICLES)) : %.html : %.txt + $(QUIET_ASCIIDOC)$(TXT_TO_HTML) $*.txt + +WEBDOC_DEST = /pub/software/scm/git/docs + +howto/%.html: ASCIIDOC_EXTRA += -a git-relative-html-prefix=../ +$(patsubst %.txt,%.html,$(wildcard howto/*.txt)): %.html : %.txt + $(QUIET_ASCIIDOC)$(RM) $@+ $@ && \ + sed -e '1,/^$$/d' $< | \ + $(TXT_TO_HTML) - >$@+ && \ + mv $@+ $@ + +install-webdoc : html + '$(SHELL_PATH_SQ)' ./install-webdoc.sh $(WEBDOC_DEST) + +# You must have a clone of 'git-htmldocs' and 'git-manpages' repositories +# next to the 'git' repository itself for the following to work. + +quick-install: quick-install-man + +require-manrepo:: + @if test ! -d $(MAN_REPO); \ + then echo "git-manpages repository must exist at $(MAN_REPO)"; exit 1; fi + +quick-install-man: require-manrepo + '$(SHELL_PATH_SQ)' ./install-doc-quick.sh $(MAN_REPO) $(DESTDIR)$(mandir) + +require-htmlrepo:: + @if test ! -d $(HTML_REPO); \ + then echo "git-htmldocs repository must exist at $(HTML_REPO)"; exit 1; fi + +quick-install-html: require-htmlrepo + '$(SHELL_PATH_SQ)' ./install-doc-quick.sh $(HTML_REPO) $(DESTDIR)$(htmldir) + +print-man1: + @for i in $(MAN1_TXT); do echo $$i; done + +.PHONY: FORCE diff --git a/Documentation/RelNotes/1.5.0.1.txt b/Documentation/RelNotes/1.5.0.1.txt new file mode 100644 index 0000000..fea3f99 --- /dev/null +++ b/Documentation/RelNotes/1.5.0.1.txt @@ -0,0 +1,42 @@ +GIT v1.5.0.1 Release Notes +========================== + +Fixes since v1.5.0 +------------------ + +* Documentation updates + + - Clarifications and corrections to 1.5.0 release notes. + + - The main documentation did not link to git-remote documentation. + + - Clarified introductory text of git-rebase documentation. + + - Converted remaining mentions of update-index on Porcelain + documents to git-add/git-rm. + + - Some i18n.* configuration variables were incorrectly + described as core.*; fixed. + +* Bugfixes + + - git-add and git-update-index on a filesystem on which + executable bits are unreliable incorrectly reused st_mode + bits even when the path changed between symlink and regular + file. + + - git-daemon marks the listening sockets with FD_CLOEXEC so + that it won't be leaked into the children. + + - segfault from git-blame when the mandatory pathname + parameter was missing was fixed; usage() message is given + instead. + + - git-rev-list did not read $GIT_DIR/config file, which means + that did not honor i18n.logoutputencoding correctly. + +* Tweaks + + - sliding mmap() inefficiently mmaped the same region of a + packfile with an access pattern that used objects in the + reverse order. This has been made more efficient. diff --git a/Documentation/RelNotes/1.5.0.2.txt b/Documentation/RelNotes/1.5.0.2.txt new file mode 100644 index 0000000..b061e50 --- /dev/null +++ b/Documentation/RelNotes/1.5.0.2.txt @@ -0,0 +1,65 @@ +GIT v1.5.0.2 Release Notes +========================== + +Fixes since v1.5.0.1 +-------------------- + +* Bugfixes + + - Automated merge conflict handling when changes to symbolic + links conflicted were completely broken. The merge-resolve + strategy created a regular file with conflict markers in it + in place of the symbolic link. The default strategy, + merge-recursive was even more broken. It removed the path + that was pointed at by the symbolic link. Both of these + problems have been fixed. + + - 'git diff maint master next' did not correctly give combined + diff across three trees. + + - 'git fast-import' portability fix for Solaris. + + - 'git show-ref --verify' without arguments did not error out + but segfaulted. + + - 'git diff :tracked-file `pwd`/an-untracked-file' gave an extra + slashes after a/ and b/. + + - 'git format-patch' produced too long filenames if the commit + message had too long line at the beginning. + + - Running 'make all' and then without changing anything + running 'make install' still rebuilt some files. This + was inconvenient when building as yourself and then + installing as root (especially problematic when the source + directory is on NFS and root is mapped to nobody). + + - 'git-rerere' failed to deal with two unconflicted paths that + sorted next to each other. + + - 'git-rerere' attempted to open(2) a symlink and failed if + there was a conflict. Since a conflicting change to a + symlink would not benefit from rerere anyway, the command + now ignores conflicting changes to symlinks. + + - 'git-repack' did not like to pass more than 64 arguments + internally to underlying 'rev-list' logic, which made it + impossible to repack after accumulating many (small) packs + in the repository. + + - 'git-diff' to review the combined diff during a conflicted + merge were not reading the working tree version correctly + when changes to a symbolic link conflicted. It should have + read the data using readlink(2) but read from the regular + file the symbolic link pointed at. + + - 'git-remote' did not like period in a remote's name. + +* Documentation updates + + - added and clarified core.bare, core.legacyheaders configurations. + + - updated "git-clone --depth" documentation. + + +* Assorted git-gui fixes. diff --git a/Documentation/RelNotes/1.5.0.3.txt b/Documentation/RelNotes/1.5.0.3.txt new file mode 100644 index 0000000..cd500f9 --- /dev/null +++ b/Documentation/RelNotes/1.5.0.3.txt @@ -0,0 +1,58 @@ +GIT v1.5.0.3 Release Notes +========================== + +Fixes since v1.5.0.2 +-------------------- + +* Bugfixes + + - 'git.el' honors the commit coding system from the configuration. + + - 'blameview' in contrib/ correctly digs deeper when a line is + clicked. + + - 'http-push' correctly makes sure the remote side has leading + path. Earlier it started in the middle of the path, and + incorrectly. + + - 'git-merge' did not exit with non-zero status when the + working tree was dirty and cannot fast forward. It does + now. + + - 'cvsexportcommit' does not lose yet-to-be-used message file. + + - int-vs-size_t typefix when running combined diff on files + over 2GB long. + + - 'git apply --whitespace=strip' should not touch unmodified + lines. + + - 'git-mailinfo' choke when a logical header line was too long. + + - 'git show A..B' did not error out. Negative ref ("not A" in + this example) does not make sense for the purpose of the + command, so now it errors out. + + - 'git fmt-merge-msg --file' without file parameter did not + correctly error out. + + - 'git archimport' barfed upon encountering a commit without + summary. + + - 'git index-pack' did not protect itself from getting a short + read out of pread(2). + + - 'git http-push' had a few buffer overruns. + + - Build dependency fixes to rebuild fetch.o when other headers + change. + +* Documentation updates + + - user-manual updates. + + - Options to 'git remote add' were described insufficiently. + + - Configuration format.suffix was not documented. + + - Other formatting and spelling fixes. diff --git a/Documentation/RelNotes/1.5.0.4.txt b/Documentation/RelNotes/1.5.0.4.txt new file mode 100644 index 0000000..feefa5d --- /dev/null +++ b/Documentation/RelNotes/1.5.0.4.txt @@ -0,0 +1,22 @@ +GIT v1.5.0.4 Release Notes +========================== + +Fixes since v1.5.0.3 +-------------------- + +* Bugfixes + + - git.el does not add duplicate sign-off lines. + + - git-commit shows the full stat of the resulting commit, not + just about the files in the current directory, when run from + a subdirectory. + + - "git-checkout -m '@{8 hours ago}'" had a funny failure from + eval; fixed. + + - git-gui updates. + +* Documentation updates + +* User manual updates diff --git a/Documentation/RelNotes/1.5.0.5.txt b/Documentation/RelNotes/1.5.0.5.txt new file mode 100644 index 0000000..eeec3d7 --- /dev/null +++ b/Documentation/RelNotes/1.5.0.5.txt @@ -0,0 +1,26 @@ +GIT v1.5.0.5 Release Notes +========================== + +Fixes since v1.5.0.3 +-------------------- + +* Bugfixes + + - git-merge (hence git-pull) did not refuse fast-forwarding + when the working tree had local changes that would have + conflicted with it. + + - git.el does not add duplicate sign-off lines. + + - git-commit shows the full stat of the resulting commit, not + just about the files in the current directory, when run from + a subdirectory. + + - "git-checkout -m '@{8 hours ago}'" had a funny failure from + eval; fixed. + + - git-gui updates. + +* Documentation updates + +* User manual updates diff --git a/Documentation/RelNotes/1.5.0.6.txt b/Documentation/RelNotes/1.5.0.6.txt new file mode 100644 index 0000000..c02015a --- /dev/null +++ b/Documentation/RelNotes/1.5.0.6.txt @@ -0,0 +1,21 @@ +GIT v1.5.0.6 Release Notes +========================== + +Fixes since v1.5.0.5 +-------------------- + +* Bugfixes + + - a handful small fixes to gitweb. + + - build procedure for user-manual is fixed not to require locally + installed stylesheets. + + - "git commit $paths" on paths whose earlier contents were + already updated in the index were failing out. + +* Documentation + + - user-manual has better cross references. + + - gitweb installation/deployment procedure is now documented. diff --git a/Documentation/RelNotes/1.5.0.7.txt b/Documentation/RelNotes/1.5.0.7.txt new file mode 100644 index 0000000..670ad32 --- /dev/null +++ b/Documentation/RelNotes/1.5.0.7.txt @@ -0,0 +1,18 @@ +GIT v1.5.0.7 Release Notes +========================== + +Fixes since v1.5.0.6 +-------------------- + +* Bugfixes + + - git-upload-pack failed to close unused pipe ends, resulting + in many zombies to hang around. + + - git-rerere was recording the contents of earlier hunks + duplicated in later hunks. This prevented resolving the same + conflict when performing the same merge the other way around. + +* Documentation + + - a few documentation fixes from Debian package maintainer. diff --git a/Documentation/RelNotes/1.5.0.txt b/Documentation/RelNotes/1.5.0.txt new file mode 100644 index 0000000..daf4bdb --- /dev/null +++ b/Documentation/RelNotes/1.5.0.txt @@ -0,0 +1,469 @@ +GIT v1.5.0 Release Notes +======================== + +Old news +-------- + +This section is for people who are upgrading from ancient +versions of git. Although all of the changes in this section +happened before the current v1.4.4 release, they are summarized +here in the v1.5.0 release notes for people who skipped earlier +versions. + +As of git v1.5.0 there are some optional features that changes +the repository to allow data to be stored and transferred more +efficiently. These features are not enabled by default, as they +will make the repository unusable with older versions of git. +Specifically, the available options are: + + - There is a configuration variable core.legacyheaders that + changes the format of loose objects so that they are more + efficient to pack and to send out of the repository over git + native protocol, since v1.4.2. However, loose objects + written in the new format cannot be read by git older than + that version; people fetching from your repository using + older clients over dumb transports (e.g. http) using older + versions of git will also be affected. + + To let git use the new loose object format, you have to + set core.legacyheaders to false. + + - Since v1.4.3, configuration repack.usedeltabaseoffset allows + packfile to be created in more space efficient format, which + cannot be read by git older than that version. + + To let git use the new format for packfiles, you have to + set repack.usedeltabaseoffset to true. + +The above two new features are not enabled by default and you +have to explicitly ask for them, because they make repositories +unreadable by older versions of git, and in v1.5.0 we still do +not enable them by default for the same reason. We will change +this default probably 1 year after 1.4.2's release, when it is +reasonable to expect everybody to have new enough version of +git. + + - 'git pack-refs' appeared in v1.4.4; this command allows tags + to be accessed much more efficiently than the traditional + 'one-file-per-tag' format. Older git-native clients can + still fetch from a repository that packed and pruned refs + (the server side needs to run the up-to-date version of git), + but older dumb transports cannot. Packing of refs is done by + an explicit user action, either by use of "git pack-refs + --prune" command or by use of "git gc" command. + + - 'git -p' to paginate anything -- many commands do pagination + by default on a tty. Introduced between v1.4.1 and v1.4.2; + this may surprise old timers. + + - 'git archive' superseded 'git tar-tree' in v1.4.3; + + - 'git cvsserver' was new invention in v1.3.0; + + - 'git repo-config', 'git grep', 'git rebase' and 'gitk' were + seriously enhanced during v1.4.0 timeperiod. + + - 'gitweb' became part of git.git during v1.4.0 timeperiod and + seriously modified since then. + + - reflog is an v1.4.0 invention. This allows you to name a + revision that a branch used to be at (e.g. "git diff + master@{yesterday} master" allows you to see changes since + yesterday's tip of the branch). + + +Updates in v1.5.0 since v1.4.4 series +------------------------------------- + +* Index manipulation + + - git-add is to add contents to the index (aka "staging area" + for the next commit), whether the file the contents happen to + be is an existing one or a newly created one. + + - git-add without any argument does not add everything + anymore. Use 'git-add .' instead. Also you can add + otherwise ignored files with an -f option. + + - git-add tries to be more friendly to users by offering an + interactive mode ("git-add -i"). + + - git-commit <path> used to refuse to commit if <path> was + different between HEAD and the index (i.e. update-index was + used on it earlier). This check was removed. + + - git-rm is much saner and safer. It is used to remove paths + from both the index file and the working tree, and makes sure + you are not losing any local modification before doing so. + + - git-reset <tree> <paths>... can be used to revert index + entries for selected paths. + + - git-update-index is much less visible. Many suggestions to + use the command in git output and documentation have now been + replaced by simpler commands such as "git add" or "git rm". + + +* Repository layout and objects transfer + + - The data for origin repository is stored in the configuration + file $GIT_DIR/config, not in $GIT_DIR/remotes/, for newly + created clones. The latter is still supported and there is + no need to convert your existing repository if you are + already comfortable with your workflow with the layout. + + - git-clone always uses what is known as "separate remote" + layout for a newly created repository with a working tree. + + A repository with the separate remote layout starts with only + one default branch, 'master', to be used for your own + development. Unlike the traditional layout that copied all + the upstream branches into your branch namespace (while + renaming their 'master' to your 'origin'), the new layout + puts upstream branches into local "remote-tracking branches" + with their own namespace. These can be referenced with names + such as "origin/$upstream_branch_name" and are stored in + .git/refs/remotes rather than .git/refs/heads where normal + branches are stored. + + This layout keeps your own branch namespace less cluttered, + avoids name collision with your upstream, makes it possible + to automatically track new branches created at the remote + after you clone from it, and makes it easier to interact with + more than one remote repository (you can use "git remote" to + add other repositories to track). There might be some + surprises: + + * 'git branch' does not show the remote tracking branches. + It only lists your own branches. Use '-r' option to view + the tracking branches. + + * If you are forking off of a branch obtained from the + upstream, you would have done something like 'git branch + my-next next', because traditional layout dropped the + tracking branch 'next' into your own branch namespace. + With the separate remote layout, you say 'git branch next + origin/next', which allows you to use the matching name + 'next' for your own branch. It also allows you to track a + remote other than 'origin' (i.e. where you initially cloned + from) and fork off of a branch from there the same way + (e.g. "git branch mingw j6t/master"). + + Repositories initialized with the traditional layout continue + to work. + + - New branches that appear on the origin side after a clone is + made are also tracked automatically. This is done with an + wildcard refspec "refs/heads/*:refs/remotes/origin/*", which + older git does not understand, so if you clone with 1.5.0, + you would need to downgrade remote.*.fetch in the + configuration file to specify each branch you are interested + in individually if you plan to fetch into the repository with + older versions of git (but why would you?). + + - Similarly, wildcard refspec "refs/heads/*:refs/remotes/me/*" + can be given to "git-push" command to update the tracking + branches that is used to track the repository you are pushing + from on the remote side. + + - git-branch and git-show-branch know remote tracking branches + (use the command line switch "-r" to list only tracked branches). + + - git-push can now be used to delete a remote branch or a tag. + This requires the updated git on the remote side (use "git + push <remote> :refs/heads/<branch>" to delete "branch"). + + - git-push more aggressively keeps the transferred objects + packed. Earlier we recommended to monitor amount of loose + objects and repack regularly, but you should repack when you + accumulated too many small packs this way as well. Updated + git-count-objects helps you with this. + + - git-fetch also more aggressively keeps the transferred objects + packed. This behavior of git-push and git-fetch can be + tweaked with a single configuration transfer.unpacklimit (but + usually there should not be any need for a user to tweak it). + + - A new command, git-remote, can help you manage your remote + tracking branch definitions. + + - You may need to specify explicit paths for upload-pack and/or + receive-pack due to your ssh daemon configuration on the + other end. This can now be done via remote.*.uploadpack and + remote.*.receivepack configuration. + + +* Bare repositories + + - Certain commands change their behavior in a bare repository + (i.e. a repository without associated working tree). We use + a fairly conservative heuristic (if $GIT_DIR is ".git", or + ends with "/.git", the repository is not bare) to decide if a + repository is bare, but "core.bare" configuration variable + can be used to override the heuristic when it misidentifies + your repository. + + - git-fetch used to complain updating the current branch but + this is now allowed for a bare repository. So is the use of + 'git-branch -f' to update the current branch. + + - Porcelain-ish commands that require a working tree refuses to + work in a bare repository. + + +* Reflog + + - Reflog records the history from the view point of the local + repository. In other words, regardless of the real history, + the reflog shows the history as seen by one particular + repository (this enables you to ask "what was the current + revision in _this_ repository, yesterday at 1pm?"). This + facility is enabled by default for repositories with working + trees, and can be accessed with the "branch@{time}" and + "branch@{Nth}" notation. + + - "git show-branch" learned showing the reflog data with the + new -g option. "git log" has -g option to view reflog + entries in a more verbose manner. + + - git-branch knows how to rename branches and moves existing + reflog data from the old branch to the new one. + + - In addition to the reflog support in v1.4.4 series, HEAD + reference maintains its own log. "HEAD@{5.minutes.ago}" + means the commit you were at 5 minutes ago, which takes + branch switching into account. If you want to know where the + tip of your current branch was at 5 minutes ago, you need to + explicitly say its name (e.g. "master@{5.minutes.ago}") or + omit the refname altogether i.e. "@{5.minutes.ago}". + + - The commits referred to by reflog entries are now protected + against pruning. The new command "git reflog expire" can be + used to truncate older reflog entries and entries that refer + to commits that have been pruned away previously with older + versions of git. + + Existing repositories that have been using reflog may get + complaints from fsck-objects and may not be able to run + git-repack, if you had run git-prune from older git; please + run "git reflog expire --stale-fix --all" first to remove + reflog entries that refer to commits that are no longer in + the repository when that happens. + + +* Crufts removal + + - We used to say "old commits are retrievable using reflog and + 'master@{yesterday}' syntax as long as you haven't run + git-prune". We no longer have to say the latter half of the + above sentence, as git-prune does not remove things reachable + from reflog entries. + + - There is a toplevel garbage collector script, 'git-gc', that + runs periodic cleanup functions, including 'git-repack -a -d', + 'git-reflog expire', 'git-pack-refs --prune', and 'git-rerere + gc'. + + - The output from fsck ("fsck-objects" is called just "fsck" + now, but the old name continues to work) was needlessly + alarming in that it warned missing objects that are reachable + only from dangling objects. This has been corrected and the + output is much more useful. + + +* Detached HEAD + + - You can use 'git-checkout' to check out an arbitrary revision + or a tag as well, instead of named branches. This will + dissociate your HEAD from the branch you are currently on. + + A typical use of this feature is to "look around". E.g. + + $ git checkout v2.6.16 + ... compile, test, etc. + $ git checkout v2.6.17 + ... compile, test, etc. + + - After detaching your HEAD, you can go back to an existing + branch with usual "git checkout $branch". Also you can + start a new branch using "git checkout -b $newbranch" to + start a new branch at that commit. + + - You can even pull from other repositories, make merges and + commits while your HEAD is detached. Also you can use "git + reset" to jump to arbitrary commit, while still keeping your + HEAD detached. + + Remember that a detached state is volatile, i.e. it will be forgotten + as soon as you move away from it with the checkout or reset command, + unless a branch is created from it as mentioned above. It is also + possible to rescue a lost detached state from the HEAD reflog. + + +* Packed refs + + - Repositories with hundreds of tags have been paying large + overhead, both in storage and in runtime, due to the + traditional one-ref-per-file format. A new command, + git-pack-refs, can be used to "pack" them in more efficient + representation (you can let git-gc do this for you). + + - Clones and fetches over dumb transports are now aware of + packed refs and can download from repositories that use + them. + + +* Configuration + + - configuration related to color setting are consolidated under + color.* namespace (older diff.color.*, status.color.* are + still supported). + + - 'git-repo-config' command is accessible as 'git-config' now. + + +* Updated features + + - git-describe uses better criteria to pick a base ref. It + used to pick the one with the newest timestamp, but now it + picks the one that is topologically the closest (that is, + among ancestors of commit C, the ref T that has the shortest + output from "git-rev-list T..C" is chosen). + + - git-describe gives the number of commits since the base ref + between the refname and the hash suffix. E.g. the commit one + before v2.6.20-rc6 in the kernel repository is: + + v2.6.20-rc5-306-ga21b069 + + which tells you that its object name begins with a21b069, + v2.6.20-rc5 is an ancestor of it (meaning, the commit + contains everything -rc5 has), and there are 306 commits + since v2.6.20-rc5. + + - git-describe with --abbrev=0 can be used to show only the + name of the base ref. + + - git-blame learned a new option, --incremental, that tells it + to output the blames as they are assigned. A sample script + to use it is also included as contrib/blameview. + + - git-blame starts annotating from the working tree by default. + + +* Less external dependency + + - We no longer require the "merge" program from the RCS suite. + All 3-way file-level merges are now done internally. + + - The original implementation of git-merge-recursive which was + in Python has been removed; we have a C implementation of it + now. + + - git-shortlog is no longer a Perl script. It no longer + requires output piped from git-log; it can accept revision + parameters directly on the command line. + + +* I18n + + - We have always encouraged the commit message to be encoded in + UTF-8, but the users are allowed to use legacy encoding as + appropriate for their projects. This will continue to be the + case. However, a non UTF-8 commit encoding _must_ be + explicitly set with i18n.commitencoding in the repository + where a commit is made; otherwise git-commit-tree will + complain if the log message does not look like a valid UTF-8 + string. + + - The value of i18n.commitencoding in the originating + repository is recorded in the commit object on the "encoding" + header, if it is not UTF-8. git-log and friends notice this, + and reencodes the message to the log output encoding when + displaying, if they are different. The log output encoding + is determined by "git log --encoding=<encoding>", + i18n.logoutputencoding configuration, or i18n.commitencoding + configuration, in the decreasing order of preference, and + defaults to UTF-8. + + - Tools for e-mailed patch application now default to -u + behavior; i.e. it always re-codes from the e-mailed encoding + to the encoding specified with i18n.commitencoding. This + unfortunately forces projects that have happily been using a + legacy encoding without setting i18n.commitencoding to set + the configuration, but taken with other improvement, please + excuse us for this very minor one-time inconvenience. + + +* e-mailed patches + + - See the above I18n section. + + - git-format-patch now enables --binary without being asked. + git-am does _not_ default to it, as sending binary patch via + e-mail is unusual and is harder to review than textual + patches and it is prudent to require the person who is + applying the patch to explicitly ask for it. + + - The default suffix for git-format-patch output is now ".patch", + not ".txt". This can be changed with --suffix=.txt option, + or setting the config variable "format.suffix" to ".txt". + + +* Foreign SCM interfaces + + - git-svn now requires the Perl SVN:: libraries, the + command-line backend was too slow and limited. + + - the 'commit' subcommand of git-svn has been renamed to + 'set-tree', and 'dcommit' is the recommended replacement for + day-to-day work. + + - git fast-import backend. + + +* User support + + - Quite a lot of documentation updates. + + - Bash completion scripts have been updated heavily. + + - Better error messages for often used Porcelainish commands. + + - Git GUI. This is a simple Tk based graphical interface for + common Git operations. + + +* Sliding mmap + + - We used to assume that we can mmap the whole packfile while + in use, but with a large project this consumes huge virtual + memory space and truly huge ones would not fit in the + userland address space on 32-bit platforms. We now mmap huge + packfile in pieces to avoid this problem. + + +* Shallow clones + + - There is a partial support for 'shallow' repositories that + keeps only recent history. A 'shallow clone' is created by + specifying how deep that truncated history should be + (e.g. "git clone --depth 5 git://some.where/repo.git"). + + Currently a shallow repository has number of limitations: + + - Cloning and fetching _from_ a shallow clone are not + supported (nor tested -- so they might work by accident but + they are not expected to). + + - Pushing from nor into a shallow clone are not expected to + work. + + - Merging inside a shallow repository would work as long as a + merge base is found in the recent history, but otherwise it + will be like merging unrelated histories and may result in + huge conflicts. + + but this would be more than adequate for people who want to + look at near the tip of a big project with a deep history and + send patches in e-mail format. diff --git a/Documentation/RelNotes/1.5.1.1.txt b/Documentation/RelNotes/1.5.1.1.txt new file mode 100644 index 0000000..9147121 --- /dev/null +++ b/Documentation/RelNotes/1.5.1.1.txt @@ -0,0 +1,65 @@ +GIT v1.5.1.1 Release Notes +========================== + +Fixes since v1.5.1 +------------------ + +* Documentation updates + + - The --left-right option of rev-list and friends is documented. + + - The documentation for cvsimport has been majorly improved. + + - "git-show-ref --exclude-existing" was documented. + +* Bugfixes + + - The implementation of -p option in "git cvsexportcommit" had + the meaning of -C (context reduction) option wrong, and + loosened the context requirements when it was told to be + strict. + + - "git cvsserver" did not behave like the real cvsserver when + client side removed a file from the working tree without + doing anything else on the path. In such a case, it should + restore it from the checked out revision. + + - "git fsck" issued an alarming error message on detached + HEAD. It is not an error since at least 1.5.0. + + - "git send-email" produced of References header of unbounded length; + fixed this with line-folding. + + - "git archive" to download from remote site should not + require you to be in a git repository, but it incorrectly + did. + + - "git apply" ignored -p<n> for "diff --git" formatted + patches. + + - "git rerere" recorded a conflict that had one side empty + (the other side adds) incorrectly; this made merging in the + other direction fail to use previously recorded resolution. + + - t4200 test was broken where "wc -l" pads its output with + spaces. + + - "git branch -m old new" to rename branch did not work + without a configuration file in ".git/config". + + - The sample hook for notification e-mail was misnamed. + + - gitweb did not show type-changing patch correctly in the + blobdiff view. + + - git-svn did not error out with incorrect command line options. + + - git-svn fell into an infinite loop when insanely long commit + message was found. + + - git-svn dcommit and rebase was confused by patches that were + merged from another branch that is managed by git-svn. + + - git-svn used to get confused when globbing remote branch/tag + spec (e.g. "branches = proj/branches/*:refs/remotes/origin/*") + is used and there was a plain file that matched the glob. diff --git a/Documentation/RelNotes/1.5.1.2.txt b/Documentation/RelNotes/1.5.1.2.txt new file mode 100644 index 0000000..d884563 --- /dev/null +++ b/Documentation/RelNotes/1.5.1.2.txt @@ -0,0 +1,50 @@ +GIT v1.5.1.2 Release Notes +========================== + +Fixes since v1.5.1.1 +-------------------- + +* Bugfixes + + - "git clone" over http from a repository that has lost the + loose refs by running "git pack-refs" were broken (a code to + deal with this was added to "git fetch" in v1.5.0, but it + was missing from "git clone"). + + - "git diff a/ b/" incorrectly fell in "diff between two + filesystem objects" codepath, when the user most likely + wanted to limit the extent of output to two tracked + directories. + + - git-quiltimport had the same bug as we fixed for + git-applymbox in v1.5.1.1 -- it gave an alarming "did not + have any patch" message (but did not actually fail and was + harmless). + + - various git-svn fixes. + + - Sample update hook incorrectly always refused requests to + delete branches through push. + + - git-blame on a very long working tree path had buffer + overrun problem. + + - git-apply did not like to be fed two patches in a row that created + and then modified the same file. + + - git-svn was confused when a non-project was stored directly under + trunk/, branches/ and tags/. + + - git-svn wants the Error.pm module that was at least as new + as what we ship as part of git; install ours in our private + installation location if the one on the system is older. + + - An earlier update to command line integer parameter parser was + botched and made 'update-index --cacheinfo' completely useless. + + +* Documentation updates + + - Various documentation updates from J. Bruce Fields, Frank + Lichtenheld, Alex Riesen and others. Andrew Ruder started a + war on undocumented options. diff --git a/Documentation/RelNotes/1.5.1.3.txt b/Documentation/RelNotes/1.5.1.3.txt new file mode 100644 index 0000000..876408b --- /dev/null +++ b/Documentation/RelNotes/1.5.1.3.txt @@ -0,0 +1,45 @@ +GIT v1.5.1.3 Release Notes +========================== + +Fixes since v1.5.1.2 +-------------------- + +* Bugfixes + + - git-add tried to optimize by finding common leading + directories across its arguments but botched, causing very + confused behaviour. + + - unofficial rpm.spec file shipped with git was letting + ETC_GITCONFIG set to /usr/etc/gitconfig. Tweak the official + Makefile to make it harder for distro people to make the + same mistake, by setting the variable to /etc/gitconfig if + prefix is set to /usr. + + - git-svn inconsistently stripped away username from the URL + only when svnsync_props was in use. + + - git-svn got confused when handling symlinks on Mac OS. + + - git-send-email was not quoting recipient names that have + period '.' in them. Also it did not allow overriding + envelope sender, which made it impossible to send patches to + certain subscriber-only lists. + + - built-in write_tree() routine had a sequence that renamed a + file that is still open, which some systems did not like. + + - when memory is very tight, sliding mmap code to read + packfiles incorrectly closed the fd that was still being + used to read the pack. + + - import-tars contributed front-end for fastimport was passing + wrong directory modes without checking. + + - git-fastimport trusted its input too much and allowed to + create corrupt tree objects with entries without a name. + + - git-fetch needlessly barfed when too long reflog action + description was given by the caller. + +Also contains various documentation updates. diff --git a/Documentation/RelNotes/1.5.1.4.txt b/Documentation/RelNotes/1.5.1.4.txt new file mode 100644 index 0000000..df2f66c --- /dev/null +++ b/Documentation/RelNotes/1.5.1.4.txt @@ -0,0 +1,30 @@ +GIT v1.5.1.4 Release Notes +========================== + +Fixes since v1.5.1.3 +-------------------- + +* Bugfixes + + - "git-http-fetch" did not work around a bug in libcurl + earlier than 7.16 (curl_multi_remove_handle() was broken). + + - "git cvsserver" handles a file that was once removed and + then added again correctly. + + - import-tars script (in contrib/) handles GNU tar archives + that contain pathnames longer than 100 bytes (long-link + extension) correctly. + + - xdelta test program did not build correctly. + + - gitweb sometimes tried incorrectly to apply function to + decode utf8 twice, resulting in corrupt output. + + - "git blame -C" mishandled text at the end of a group of + lines. + + - "git log/rev-list --boundary" did not produce output + correctly without --left-right option. + + - Many documentation updates. diff --git a/Documentation/RelNotes/1.5.1.5.txt b/Documentation/RelNotes/1.5.1.5.txt new file mode 100644 index 0000000..b0ab8eb --- /dev/null +++ b/Documentation/RelNotes/1.5.1.5.txt @@ -0,0 +1,42 @@ +GIT v1.5.1.5 Release Notes +========================== + +Fixes since v1.5.1.4 +-------------------- + +* Bugfixes + + - git-send-email did not understand aliases file for mutt, which + allows leading whitespaces. + + - git-format-patch emitted Content-Type and Content-Transfer-Encoding + headers for non ASCII contents, but failed to add MIME-Version. + + - git-name-rev had a buffer overrun with a deep history. + + - contributed script import-tars did not get the directory in + tar archives interpreted correctly. + + - git-svn was reported to segfault for many people on list and + #git; hopefully this has been fixed. + + - "git-svn clone" does not try to minimize the URL + (i.e. connect to higher level hierarchy) by default, as this + can prevent clone to fail if only part of the repository + (e.g. 'trunk') is open to public. + + - "git checkout branch^0" did not detach the head when you are + already on 'branch'; backported the fix from the 'master'. + + - "git-config section.var" did not correctly work when + existing configuration file had both [section] and [section "name"] + next to each other. + + - "git clone ../other-directory" was fooled if the current + directory $PWD points at is a symbolic link. + + - (build) tree_entry_extract() function was both static inline + and extern, which caused trouble compiling with Forte12 + compilers on Sun. + + - Many many documentation fixes and updates. diff --git a/Documentation/RelNotes/1.5.1.6.txt b/Documentation/RelNotes/1.5.1.6.txt new file mode 100644 index 0000000..55f3ac1 --- /dev/null +++ b/Documentation/RelNotes/1.5.1.6.txt @@ -0,0 +1,45 @@ +GIT v1.5.1.6 Release Notes +========================== + +Fixes since v1.5.1.4 +-------------------- + +* Bugfixes + + - git-send-email did not understand aliases file for mutt, which + allows leading whitespaces. + + - git-format-patch emitted Content-Type and Content-Transfer-Encoding + headers for non ASCII contents, but failed to add MIME-Version. + + - git-name-rev had a buffer overrun with a deep history. + + - contributed script import-tars did not get the directory in + tar archives interpreted correctly. + + - git-svn was reported to segfault for many people on list and + #git; hopefully this has been fixed. + + - git-svn also had a bug to crash svnserve by sending a bad + sequence of requests. + + - "git-svn clone" does not try to minimize the URL + (i.e. connect to higher level hierarchy) by default, as this + can prevent clone to fail if only part of the repository + (e.g. 'trunk') is open to public. + + - "git checkout branch^0" did not detach the head when you are + already on 'branch'; backported the fix from the 'master'. + + - "git-config section.var" did not correctly work when + existing configuration file had both [section] and [section "name"] + next to each other. + + - "git clone ../other-directory" was fooled if the current + directory $PWD points at is a symbolic link. + + - (build) tree_entry_extract() function was both static inline + and extern, which caused trouble compiling with Forte12 + compilers on Sun. + + - Many many documentation fixes and updates. diff --git a/Documentation/RelNotes/1.5.1.txt b/Documentation/RelNotes/1.5.1.txt new file mode 100644 index 0000000..daed367 --- /dev/null +++ b/Documentation/RelNotes/1.5.1.txt @@ -0,0 +1,371 @@ +GIT v1.5.1 Release Notes +======================== + +Updates since v1.5.0 +-------------------- + +* Deprecated commands and options. + + - git-diff-stages and git-resolve have been removed. + +* New commands and options. + + - "git log" and friends take --reverse, which instructs them + to give their output in the order opposite from their usual. + They typically output from new to old, but with this option + their output would read from old to new. "git shortlog" + usually lists older commits first, but with this option, + they are shown from new to old. + + - "git log --pretty=format:<string>" to allow more flexible + custom log output. + + - "git diff" learned --ignore-space-at-eol. This is a weaker + form of --ignore-space-change. + + - "git diff --no-index pathA pathB" can be used as diff + replacement with git specific enhancements. + + - "git diff --no-index" can read from '-' (standard input). + + - "git diff" also learned --exit-code to exit with non-zero + status when it found differences. In the future we might + want to make this the default but that would be a rather big + backward incompatible change; it will stay as an option for + now. + + - "git diff --quiet" is --exit-code with output turned off, + meant for scripted use to quickly determine if there is any + tree-level difference. + + - Textual patch generation with "git diff" without -w/-b + option has been significantly optimized. "git blame" got + faster because of the same change. + + - "git log" and "git rev-list" has been optimized + significantly when they are used with pathspecs. + + - "git branch --track" can be used to set up configuration + variables to help it easier to base your work on branches + you track from a remote site. + + - "git format-patch --attach" now emits attachments. Use + --inline to get an inlined multipart/mixed. + + - "git name-rev" learned --refs=<pattern>, to limit the tags + used for naming the given revisions only to the ones + matching the given pattern. + + - "git remote update" is to run "git fetch" for defined remotes + to update tracking branches. + + - "git cvsimport" can now take '-d' to talk with a CVS + repository different from what are recorded in CVS/Root + (overriding it with environment CVSROOT does not work). + + - "git bundle" can help sneaker-netting your changes between + repositories. + + - "git mergetool" can help 3-way file-level conflict + resolution with your favorite graphical merge tools. + + - A new configuration "core.symlinks" can be used to disable + symlinks on filesystems that do not support them; they are + checked out as regular files instead. + + - You can name a commit object with its first line of the + message. The syntax to use is ':/message text'. E.g. + + $ git show ":/object name: introduce ':/<oneline prefix>' notation" + + means the same thing as: + + $ git show 28a4d940443806412effa246ecc7768a21553ec7 + + - "git bisect" learned a new command "run" that takes a script + to run after each revision is checked out to determine if it + is good or bad, to automate the bisection process. + + - "git log" family learned a new traversal option --first-parent, + which does what the name suggests. + + +* Updated behavior of existing commands. + + - "git-merge-recursive" used to barf when there are more than + one common ancestors for the merge, and merging them had a + rename/rename conflict. This has been fixed. + + - "git fsck" does not barf on corrupt loose objects. + + - "git rm" does not remove newly added files without -f. + + - "git archimport" allows remapping when coming up with git + branch names from arch names. + + - git-svn got almost a rewrite. + + - core.autocrlf configuration, when set to 'true', makes git + to convert CRLF at the end of lines in text files to LF when + reading from the filesystem, and convert in reverse when + writing to the filesystem. The variable can be set to + 'input', in which case the conversion happens only while + reading from the filesystem but files are written out with + LF at the end of lines. Currently, which paths to consider + 'text' (i.e. be subjected to the autocrlf mechanism) is + decided purely based on the contents, but the plan is to + allow users to explicitly override this heuristic based on + paths. + + - The behavior of 'git-apply', when run in a subdirectory, + without --index nor --cached were inconsistent with that of + the command with these options. This was fixed to match the + behavior with --index. A patch that is meant to be applied + with -p1 from the toplevel of the project tree can be + applied with any custom -p<n> option. A patch that is not + relative to the toplevel needs to be applied with -p<n> + option with or without --index (or --cached). + + - "git diff" outputs a trailing HT when pathnames have embedded + SP on +++/--- header lines, in order to help "GNU patch" to + parse its output. "git apply" was already updated to accept + this modified output format since ce74618d (Sep 22, 2006). + + - "git cvsserver" runs hooks/update and honors its exit status. + + - "git cvsserver" can be told to send everything with -kb. + + - "git diff --check" also honors the --color output option. + + - "git name-rev" used to stress the fact that a ref is a tag too + much, by saying something like "v1.2.3^0~22". It now says + "v1.2.3~22" in such a case (it still says "v1.2.3^0" if it does + not talk about an ancestor of the commit that is tagged, which + makes sense). + + - "git rev-list --boundary" now shows boundary markers for the + commits omitted by --max-age and --max-count condition. + + - The configuration mechanism now reads $(prefix)/etc/gitconfig. + + - "git apply --verbose" shows what preimage lines were wanted + when it couldn't find them. + + - "git status" in a read-only repository got a bit saner. + + - "git fetch" (hence "git clone" and "git pull") are less + noisy when the output does not go to tty. + + - "git fetch" between repositories with many refs were slow + even when there are not many changes that needed + transferring. This has been sped up by partially rewriting + the heaviest parts in C. + + - "git mailinfo" which splits an e-mail into a patch and the + meta-information was rewritten, thanks to Don Zickus. It + handles nested multipart better. The command was broken for + a brief period on 'master' branch since 1.5.0 but the + breakage is fixed now. + + - send-email learned configurable bcc and chain-reply-to. + + - "git remote show $remote" also talks about branches that + would be pushed if you run "git push remote". + + - Using objects from packs is now seriously optimized by clever + use of a cache. This should be most noticeable in git-log + family of commands that involve reading many tree objects. + In addition, traversing revisions while filtering changes + with pathspecs is made faster by terminating the comparison + between the trees as early as possible. + + +* Hooks + + - The part to send out notification e-mails was removed from + the sample update hook, as it was not an appropriate place + to do so. The proper place to do this is the new post-receive + hook. An example hook has been added to contrib/hooks/. + + +* Others + + - git-revert, git-gc and git-cherry-pick are now built-ins. + +Fixes since v1.5.0 +------------------ + +These are all in v1.5.0.x series. + +* Documentation updates + + - Clarifications and corrections to 1.5.0 release notes. + + - The main documentation did not link to git-remote documentation. + + - Clarified introductory text of git-rebase documentation. + + - Converted remaining mentions of update-index on Porcelain + documents to git-add/git-rm. + + - Some i18n.* configuration variables were incorrectly + described as core.*; fixed. + + - added and clarified core.bare, core.legacyheaders configurations. + + - updated "git-clone --depth" documentation. + + - user-manual updates. + + - Options to 'git remote add' were described insufficiently. + + - Configuration format.suffix was not documented. + + - Other formatting and spelling fixes. + + - user-manual has better cross references. + + - gitweb installation/deployment procedure is now documented. + + +* Bugfixes + + - git-upload-pack closes unused pipe ends; earlier this caused + many zombies to hang around. + + - git-rerere was recording the contents of earlier hunks + duplicated in later hunks. This prevented resolving the same + conflict when performing the same merge the other way around. + + - git-add and git-update-index on a filesystem on which + executable bits are unreliable incorrectly reused st_mode + bits even when the path changed between symlink and regular + file. + + - git-daemon marks the listening sockets with FD_CLOEXEC so + that it won't be leaked into the children. + + - segfault from git-blame when the mandatory pathname + parameter was missing was fixed; usage() message is given + instead. + + - git-rev-list did not read $GIT_DIR/config file, which means + that did not honor i18n.logoutputencoding correctly. + + - Automated merge conflict handling when changes to symbolic + links conflicted were completely broken. The merge-resolve + strategy created a regular file with conflict markers in it + in place of the symbolic link. The default strategy, + merge-recursive was even more broken. It removed the path + that was pointed at by the symbolic link. Both of these + problems have been fixed. + + - 'git diff maint master next' did not correctly give combined + diff across three trees. + + - 'git fast-import' portability fix for Solaris. + + - 'git show-ref --verify' without arguments did not error out + but segfaulted. + + - 'git diff :tracked-file `pwd`/an-untracked-file' gave an extra + slashes after a/ and b/. + + - 'git format-patch' produced too long filenames if the commit + message had too long line at the beginning. + + - Running 'make all' and then without changing anything + running 'make install' still rebuilt some files. This + was inconvenient when building as yourself and then + installing as root (especially problematic when the source + directory is on NFS and root is mapped to nobody). + + - 'git-rerere' failed to deal with two unconflicted paths that + sorted next to each other. + + - 'git-rerere' attempted to open(2) a symlink and failed if + there was a conflict. Since a conflicting change to a + symlink would not benefit from rerere anyway, the command + now ignores conflicting changes to symlinks. + + - 'git-repack' did not like to pass more than 64 arguments + internally to underlying 'rev-list' logic, which made it + impossible to repack after accumulating many (small) packs + in the repository. + + - 'git-diff' to review the combined diff during a conflicted + merge were not reading the working tree version correctly + when changes to a symbolic link conflicted. It should have + read the data using readlink(2) but read from the regular + file the symbolic link pointed at. + + - 'git-remote' did not like period in a remote's name. + + - 'git.el' honors the commit coding system from the configuration. + + - 'blameview' in contrib/ correctly digs deeper when a line is + clicked. + + - 'http-push' correctly makes sure the remote side has leading + path. Earlier it started in the middle of the path, and + incorrectly. + + - 'git-merge' did not exit with non-zero status when the + working tree was dirty and cannot fast forward. It does + now. + + - 'cvsexportcommit' does not lose yet-to-be-used message file. + + - int-vs-size_t typefix when running combined diff on files + over 2GB long. + + - 'git apply --whitespace=strip' should not touch unmodified + lines. + + - 'git-mailinfo' choke when a logical header line was too long. + + - 'git show A..B' did not error out. Negative ref ("not A" in + this example) does not make sense for the purpose of the + command, so now it errors out. + + - 'git fmt-merge-msg --file' without file parameter did not + correctly error out. + + - 'git archimport' barfed upon encountering a commit without + summary. + + - 'git index-pack' did not protect itself from getting a short + read out of pread(2). + + - 'git http-push' had a few buffer overruns. + + - Build dependency fixes to rebuild fetch.o when other headers + change. + + - git.el does not add duplicate sign-off lines. + + - git-commit shows the full stat of the resulting commit, not + just about the files in the current directory, when run from + a subdirectory. + + - "git-checkout -m '@{8 hours ago}'" had a funny failure from + eval; fixed. + + - git-merge (hence git-pull) did not refuse fast-forwarding + when the working tree had local changes that would have + conflicted with it. + + - a handful small fixes to gitweb. + + - build procedure for user-manual is fixed not to require locally + installed stylesheets. + + - "git commit $paths" on paths whose earlier contents were + already updated in the index were failing out. + + +* Tweaks + + - sliding mmap() inefficiently mmaped the same region of a + packfile with an access pattern that used objects in the + reverse order. This has been made more efficient. diff --git a/Documentation/RelNotes/1.5.2.1.txt b/Documentation/RelNotes/1.5.2.1.txt new file mode 100644 index 0000000..d41984d --- /dev/null +++ b/Documentation/RelNotes/1.5.2.1.txt @@ -0,0 +1,47 @@ +GIT v1.5.2.1 Release Notes +========================== + +Fixes since v1.5.2 +------------------ + +* Bugfixes + + - Temporary files that are used when invoking external diff + programs did not tolerate a long TMPDIR. + + - git-daemon did not notice when it could not write into its + pid file. + + - git-status did not honor core.excludesFile configuration like + git-add did. + + - git-annotate did not work from a subdirectory while + git-blame did. + + - git-cvsserver should have disabled access to a repository + with "gitcvs.pserver.enabled = false" set even when + "gitcvs.enabled = true" was set at the same time. It + didn't. + + - git-cvsimport did not work correctly in a repository with + its branch heads were packed with pack-refs. + + - ident unexpansion to squash "$Id: xxx $" that is in the + repository copy removed incorrect number of bytes. + + - git-svn misbehaved when the subversion repository did not + provide MD5 checksums for files. + + - git rebase (and git am) misbehaved on commits that have '\n' + (literally backslash and en, not a linefeed) in the title. + + - code to decode base85 used in binary patches had one error + return codepath wrong. + + - RFC2047 Q encoding output by git-format-patch used '_' for a + space, which is not understood by some programs. It uses =20 + which is safer. + + - git-fastimport --import-marks was broken; fixed. + + - A lot of documentation updates, clarifications and fixes. diff --git a/Documentation/RelNotes/1.5.2.2.txt b/Documentation/RelNotes/1.5.2.2.txt new file mode 100644 index 0000000..7bfa341 --- /dev/null +++ b/Documentation/RelNotes/1.5.2.2.txt @@ -0,0 +1,61 @@ +GIT v1.5.2.2 Release Notes +========================== + +Fixes since v1.5.2.1 +-------------------- + +* Usability fix + + - git-gui is shipped with its updated blame interface. It is + rumored that the older one was not just unusable but was + active health hazard, but this one is actually pretty. + Please see for yourself. + +* Bugfixes + + - "git checkout fubar" was utterly confused when there is a + branch fubar and a tag fubar at the same time. It correctly + checks out the branch fubar now. + + - "git clone /path/foo" to clone a local /path/foo.git + repository left an incorrect configuration. + + - "git send-email" correctly unquotes RFC 2047 quoted names in + the patch-email before using their values. + + - We did not accept number of seconds since epoch older than + year 2000 as a valid timestamp. We now interpret positive + integers more than 8 digits as such, which allows us to + express timestamps more recent than March 1973. + + - git-cvsimport did not work when you have GIT_DIR to point + your repository at a nonstandard location. + + - Some systems (notably, Solaris) lack hstrerror() to make + h_errno human readable; prepare a replacement + implementation. + + - .gitignore file listed git-core.spec but what we generate is + git.spec, and nobody noticed for a long time. + + - "git-merge-recursive" does not try to run file level merge + on binary files. + + - "git-branch --track" did not create tracking configuration + correctly when the branch name had slash in it. + + - The email address of the user specified with user.email + configuration was overridden by EMAIL environment variable. + + - The tree parser did not warn about tree entries with + nonsense file modes, and assumed they must be blobs. + + - "git log -z" without any other request to generate diff still + invoked the diff machinery, wasting cycles. + +* Documentation + + - Many updates to fix stale or missing documentation. + + - Although our documentation was primarily meant to be formatted + with AsciiDoc7, formatting with AsciiDoc8 is supported better. diff --git a/Documentation/RelNotes/1.5.2.3.txt b/Documentation/RelNotes/1.5.2.3.txt new file mode 100644 index 0000000..addb229 --- /dev/null +++ b/Documentation/RelNotes/1.5.2.3.txt @@ -0,0 +1,27 @@ +GIT v1.5.2.3 Release Notes +========================== + +Fixes since v1.5.2.2 +-------------------- + + * Bugfixes + + - Version 2 pack index format was introduced in version 1.5.2 + to support pack files that has offset that cannot be + represented in 32-bit. The runtime code to validate such + an index mishandled such an index for an empty pack. + + - Commit walkers (most notably, fetch over http protocol) + tried to traverse commit objects contained in trees (aka + subproject); they shouldn't. + + - A build option NO_R_TO_GCC_LINKER was not explained in Makefile + comment correctly. + + * Documentation Fixes and Updates + + - git-config --regexp was not documented properly. + + - git-repack -a was not documented properly. + + - git-remote -n was not documented properly. diff --git a/Documentation/RelNotes/1.5.2.4.txt b/Documentation/RelNotes/1.5.2.4.txt new file mode 100644 index 0000000..75cff47 --- /dev/null +++ b/Documentation/RelNotes/1.5.2.4.txt @@ -0,0 +1,28 @@ +GIT v1.5.2.4 Release Notes +========================== + +Fixes since v1.5.2.3 +-------------------- + + * Bugfixes + + - "git-gui" bugfixes, including a handful fixes to run it + better on Cygwin/MSYS. + + - "git checkout" failed to switch back and forth between + branches, one of which has "frotz -> xyzzy" symlink and + file "xyzzy/filfre", while the other one has a file + "frotz/filfre". + + - "git prune" used to segfault upon seeing a commit that is + referred to by a tree object (aka "subproject"). + + - "git diff --name-status --no-index" mishandled an added file. + + - "git apply --reverse --whitespace=warn" still complained + about whitespaces that a forward application would have + introduced. + + * Documentation Fixes and Updates + + - A handful documentation updates. diff --git a/Documentation/RelNotes/1.5.2.5.txt b/Documentation/RelNotes/1.5.2.5.txt new file mode 100644 index 0000000..e8281c7 --- /dev/null +++ b/Documentation/RelNotes/1.5.2.5.txt @@ -0,0 +1,30 @@ +GIT v1.5.2.5 Release Notes +========================== + +Fixes since v1.5.2.4 +-------------------- + + * Bugfixes + + - "git add -u" had a serious data corruption problem in one + special case (when the changes to a subdirectory's files + consist only deletion of files). + + - "git add -u <path>" did not work from a subdirectory. + + - "git apply" left an empty directory after all its files are + renamed away. + + - "git $anycmd foo/bar", when there is a file 'foo' in the + working tree, complained that "git $anycmd foo/bar --" form + should be used to disambiguate between revs and files, + which was completely bogus. + + - "git checkout-index" and other commands that checks out + files to the work tree tried unlink(2) on directories, + which is a sane thing to do on sane systems, but not on + Solaris when you are root. + + * Documentation Fixes and Updates + + - A handful documentation fixes. diff --git a/Documentation/RelNotes/1.5.2.txt b/Documentation/RelNotes/1.5.2.txt new file mode 100644 index 0000000..e8328d0 --- /dev/null +++ b/Documentation/RelNotes/1.5.2.txt @@ -0,0 +1,197 @@ +GIT v1.5.2 Release Notes +======================== + +Updates since v1.5.1 +-------------------- + +* Plumbing level superproject support. + + You can include a subdirectory that has an independent git + repository in your index and tree objects of your project + ("superproject"). This plumbing (i.e. "core") level + superproject support explicitly excludes recursive behaviour. + + The "subproject" entries in the index and trees of a superproject + are incompatible with older versions of git. Experimenting with + the plumbing level support is encouraged, but be warned that + unless everybody in your project updates to this release or + later, using this feature would make your project + inaccessible by people with older versions of git. + +* Plumbing level gitattributes support. + + The gitattributes mechanism allows you to add 'attributes' to + paths in your project, and affect the way certain git + operations work. Currently you can influence if a path is + considered a binary or text (the former would be treated by + 'git diff' not to produce textual output; the latter can go + through the line endings conversion process in repositories + with core.autocrlf set), expand and unexpand '$Id$' keyword + with blob object name, specify a custom 3-way merge driver, + and specify a custom diff driver. You can also apply + arbitrary filter to contents on check-in/check-out codepath + but this feature is an extremely sharp-edged razor and needs + to be handled with caution (do not use it unless you + understand the earlier mailing list discussion on keyword + expansion). These conversions apply when checking files in + or out, and exporting via git-archive. + +* The packfile format now optionally supports 64-bit index. + + This release supports the "version 2" format of the .idx + file. This is automatically enabled when a huge packfile + needs more than 32-bit to express offsets of objects in the + pack. + +* Comes with an updated git-gui 0.7.1 + +* Updated gitweb: + + - can show combined diff for merges; + - uses font size of user's preference, not hardcoded in pixels; + - can now 'grep'; + +* New commands and options. + + - "git bisect start" can optionally take a single bad commit and + zero or more good commits on the command line. + + - "git shortlog" can optionally be told to wrap its output. + + - "subtree" merge strategy allows another project to be merged in as + your subdirectory. + + - "git format-patch" learned a new --subject-prefix=<string> + option, to override the built-in "[PATCH]". + + - "git add -u" is a quick way to do the first stage of "git + commit -a" (i.e. update the index to match the working + tree); it obviously does not make a commit. + + - "git clean" honors a new configuration, "clean.requireforce". When + set to true, this makes "git clean" a no-op, preventing you + from losing files by typing "git clean" when you meant to + say "make clean". You can still say "git clean -f" to + override this. + + - "git log" family of commands learned --date={local,relative,default} + option. --date=relative is synonym to the --relative-date. + --date=local gives the timestamp in local timezone. + +* Updated behavior of existing commands. + + - When $GIT_COMMITTER_EMAIL or $GIT_AUTHOR_EMAIL is not set + but $EMAIL is set, the latter is used as a substitute. + + - "git diff --stat" shows size of preimage and postimage blobs + for binary contents. Earlier it only said "Bin". + + - "git lost-found" shows stuff that are unreachable except + from reflogs. + + - "git checkout branch^0" now detaches HEAD at the tip commit + on the named branch, instead of just switching to the + branch (use "git checkout branch" to switch to the branch, + as before). + + - "git bisect next" can be used after giving only a bad commit + without giving a good one (this starts bisection half-way to + the root commit). We used to refuse to operate without a + good and a bad commit. + + - "git push", when pushing into more than one repository, does + not stop at the first error. + + - "git archive" does not insist you to give --format parameter + anymore; it defaults to "tar". + + - "git cvsserver" can use backends other than sqlite. + + - "gitview" (in contrib/ section) learned to better support + "git-annotate". + + - "git diff $commit1:$path2 $commit2:$path2" can now report + mode changes between the two blobs. + + - Local "git fetch" from a repository whose object store is + one of the alternates (e.g. fetching from the origin in a + repository created with "git clone -l -s") avoids + downloading objects unnecessarily. + + - "git blame" uses .mailmap to canonicalize the author name + just like "git shortlog" does. + + - "git pack-objects" pays attention to pack.depth + configuration variable. + + - "git cherry-pick" and "git revert" does not use .msg file in + the working tree to prepare commit message; instead it uses + $GIT_DIR/MERGE_MSG as other commands do. + +* Builds + + - git-p4import has never been installed; now there is an + installation option to do so. + + - gitk and git-gui can be configured out. + + - Generated documentation pages automatically get version + information from GIT_VERSION. + + - Parallel build with "make -j" descending into subdirectory + was fixed. + +* Performance Tweaks + + - Optimized "git-rev-list --bisect" (hence "git-bisect"). + + - Optimized "git-add $path" in a large directory, most of + whose contents are ignored. + + - Optimized "git-diff-tree" for reduced memory footprint. + + - The recursive merge strategy updated a worktree file that + was changed identically in two branches, when one of them + renamed it. We do not do that when there is no rename, so + match that behaviour. This avoids excessive rebuilds. + + - The default pack depth has been increased to 50, as the + recent addition of delta_base_cache makes deeper delta chains + much less expensive to access. Depending on the project, it was + reported that this reduces the resulting pack file by 10% + or so. + + +Fixes since v1.5.1 +------------------ + +All of the fixes in v1.5.1 maintenance series are included in +this release, unless otherwise noted. + +* Bugfixes + + - Switching branches with "git checkout" refused to work when + a path changes from a file to a directory between the + current branch and the new branch, in order not to lose + possible local changes in the directory that is being turned + into a file with the switch. We now allow such a branch + switch after making sure that there is no locally modified + file nor un-ignored file in the directory. This has not + been backported to 1.5.1.x series, as it is rather an + intrusive change. + + - Merging branches that have a file in one and a directory in + another at the same path used to get quite confused. We + handle such a case a bit more carefully, even though that is + still left as a conflict for the user to sort out. This + will not be backported to 1.5.1.x series, as it is rather an + intrusive change. + + - git-fetch had trouble with a remote with insanely large number + of refs. + + - "git clean -d -X" now does not remove non-excluded directories. + + - rebasing (without -m) a series that changes a symlink to a directory + in the middle of a path confused git-apply greatly and refused to + operate. diff --git a/Documentation/RelNotes/1.5.3.1.txt b/Documentation/RelNotes/1.5.3.1.txt new file mode 100644 index 0000000..7ff546c --- /dev/null +++ b/Documentation/RelNotes/1.5.3.1.txt @@ -0,0 +1,10 @@ +GIT v1.5.3.1 Release Notes +========================== + +Fixes since v1.5.3 +------------------ + +This is solely to fix the generated RPM's dependencies. We used +to have git-p4 package but we do not anymore. As suggested on +the mailing list, this release makes git-core "Obsolete" git-p4, +so that yum update would not complain. diff --git a/Documentation/RelNotes/1.5.3.2.txt b/Documentation/RelNotes/1.5.3.2.txt new file mode 100644 index 0000000..4bbde3c --- /dev/null +++ b/Documentation/RelNotes/1.5.3.2.txt @@ -0,0 +1,58 @@ +GIT v1.5.3.2 Release Notes +========================== + +Fixes since v1.5.3.1 +-------------------- + + * git-push sent thin packs by default, which was not good for + the public distribution server (no point in saving transfer + while pushing; no point in making the resulting pack less + optimum). + + * git-svn sometimes terminated with "Malformed network data" when + talking over svn:// protocol. + + * git-send-email re-issued the same message-id about 10% of the + time if you fired off 30 messages within a single second. + + * git-stash was not terminating the log message of commits it + internally creates with LF. + + * git-apply failed to check the size of the patch hunk when its + beginning part matched the remainder of the preimage exactly, + even though the preimage recorded in the hunk was much larger + (therefore the patch should not have applied), leading to a + segfault. + + * "git rm foo && git commit foo" complained that 'foo' needs to + be added first, instead of committing the removal, which was a + nonsense. + + * git grep -c said "/dev/null: 0". + + * git-add -u failed to recognize a blob whose type changed + between the index and the work tree. + + * The limit to rename detection has been tightened a lot to + reduce performance problems with a huge change. + + * cvsimport and svnimport barfed when the input tried to move + a tag. + + * "git apply -pN" did not chop the right number of directories. + + * "git svnimport" did not like SVN tags with funny characters in them. + + * git-gui 0.8.3, with assorted fixes, including: + + - font-chooser on X11 was unusable with large number of fonts; + - a diff that contained a deleted symlink made it barf; + - an untracked symbolic link to a directory made it fart; + - a file with % in its name made it vomit; + + +Documentation updates +--------------------- + +User manual has been somewhat restructured. I think the new +organization is much easier to read. diff --git a/Documentation/RelNotes/1.5.3.3.txt b/Documentation/RelNotes/1.5.3.3.txt new file mode 100644 index 0000000..d213846 --- /dev/null +++ b/Documentation/RelNotes/1.5.3.3.txt @@ -0,0 +1,31 @@ +GIT v1.5.3.3 Release Notes +========================== + +Fixes since v1.5.3.2 +-------------------- + + * git-quiltimport did not like it when a patch described in the + series file does not exist. + + * p4 importer missed executable bit in some cases. + + * The default shell on some FreeBSD did not execute the + argument parsing code correctly and made git unusable. + + * git-svn incorrectly spawned pager even when the user + explicitly asked not to. + + * sample post-receive hook overquoted the envelope sender + value. + + * git-am got confused when the patch contained a change that is + only about type and not contents. + + * git-mergetool did not show our and their version of the + conflicted file when started from a subdirectory of the + project. + + * git-mergetool did not pass correct options when invoking diff3. + + * git-log sometimes invoked underlying "diff" machinery + unnecessarily. diff --git a/Documentation/RelNotes/1.5.3.4.txt b/Documentation/RelNotes/1.5.3.4.txt new file mode 100644 index 0000000..b04b3a4 --- /dev/null +++ b/Documentation/RelNotes/1.5.3.4.txt @@ -0,0 +1,35 @@ +GIT v1.5.3.4 Release Notes +========================== + +Fixes since v1.5.3.3 +-------------------- + + * Change to "git-ls-files" in v1.5.3.3 that was introduced to support + partial commit of removal better had a segfaulting bug, which was + diagnosed and fixed by Keith and Carl. + + * Performance improvements for rename detection has been backported + from the 'master' branch. + + * "git-for-each-ref --format='%(numparent)'" was not working + correctly at all, and --format='%(parent)' was not working for + merge commits. + + * Sample "post-receive-hook" incorrectly sent out push + notification e-mails marked as "From: " the committer of the + commit that happened to be at the tip of the branch that was + pushed, not from the person who pushed. + + * "git-remote" did not exit non-zero status upon error. + + * "git-add -i" did not respond very well to EOF from tty nor + bogus input. + + * "git-rebase -i" squash subcommand incorrectly made the + author of later commit the author of resulting commit, + instead of taking from the first one in the squashed series. + + * "git-stash apply --index" was not documented. + + * autoconfiguration learned that "ar" command is found as "gas" on + some systems. diff --git a/Documentation/RelNotes/1.5.3.5.txt b/Documentation/RelNotes/1.5.3.5.txt new file mode 100644 index 0000000..7ff1d5d --- /dev/null +++ b/Documentation/RelNotes/1.5.3.5.txt @@ -0,0 +1,94 @@ +GIT v1.5.3.5 Release Notes +========================== + +Fixes since v1.5.3.4 +-------------------- + + * Comes with git-gui 0.8.4. + + * "git-config" silently ignored options after --list; now it will + error out with a usage message. + + * "git-config --file" failed if the argument used a relative path + as it changed directories before opening the file. + + * "git-config --file" now displays a proper error message if it + cannot read the file specified on the command line. + + * "git-config", "git-diff", "git-apply" failed if run from a + subdirectory with relative GIT_DIR and GIT_WORK_TREE set. + + * "git-blame" crashed if run during a merge conflict. + + * "git-add -i" did not handle single line hunks correctly. + + * "git-rebase -i" and "git-stash apply" failed if external diff + drivers were used for one or more files in a commit. They now + avoid calling the external diff drivers. + + * "git-log --follow" did not work unless diff generation (e.g. -p) + was also requested. + + * "git-log --follow -B" did not work at all. Fixed. + + * "git-log -M -B" did not correctly handle cases of very large files + being renamed and replaced by very small files in the same commit. + + * "git-log" printed extra newlines between commits when a diff + was generated internally (e.g. -S or --follow) but not displayed. + + * "git-push" error message is more helpful when pushing to a + repository with no matching refs and none specified. + + * "git-push" now respects + (force push) on wildcard refspecs, + matching the behavior of git-fetch. + + * "git-filter-branch" now updates the working directory when it + has finished filtering the current branch. + + * "git-instaweb" no longer fails on Mac OS X. + + * "git-cvsexportcommit" didn't always create new parent directories + before trying to create new child directories. Fixed. + + * "git-fetch" printed a scary (but bogus) error message while + fetching a tag that pointed to a tree or blob. The error did + not impact correctness, only user perception. The bogus error + is no longer printed. + + * "git-ls-files --ignored" did not properly descend into non-ignored + directories that themselves contained ignored files if d_type + was not supported by the filesystem. This bug impacted systems + such as AFS. Fixed. + + * Git segfaulted when reading an invalid .gitattributes file. Fixed. + + * post-receive-email example hook was fixed for non-fast-forward + updates. + + * Documentation updates for supported (but previously undocumented) + options of "git-archive" and "git-reflog". + + * "make clean" no longer deletes the configure script that ships + with the git tarball, making multiple architecture builds easier. + + * "git-remote show origin" spewed a warning message from Perl + when no remote is defined for the current branch via + branch.<name>.remote configuration settings. + + * Building with NO_PERL_MAKEMAKER excessively rebuilt contents + of perl/ subdirectory by rewriting perl.mak. + + * http.sslVerify configuration settings were not used in scripted + Porcelains. + + * "git-add" leaked a bit of memory while scanning for files to add. + + * A few workarounds to squelch false warnings from recent gcc have + been added. + + * "git-send-pack $remote frotz" segfaulted when there is nothing + named 'frotz' on the local end. + + * "git-rebase --interactive" did not handle its "--strategy" option + properly. diff --git a/Documentation/RelNotes/1.5.3.6.txt b/Documentation/RelNotes/1.5.3.6.txt new file mode 100644 index 0000000..069a2b2 --- /dev/null +++ b/Documentation/RelNotes/1.5.3.6.txt @@ -0,0 +1,48 @@ +GIT v1.5.3.6 Release Notes +========================== + +Fixes since v1.5.3.5 +-------------------- + + * git-cvsexportcommit handles root commits better. + + * git-svn dcommit used to clobber when sending a series of + patches. + + * git-svn dcommit failed after attempting to rebase when + started with a dirty index; now it stops upfront. + + * git-grep sometimes refused to work when your index was + unmerged. + + * "git-grep -A1 -B2" acted as if it was told to run "git -A1 -B21". + + * git-hash-object did not honor configuration variables, such as + core.compression. + + * git-index-pack choked on a huge pack on 32-bit machines, even when + large file offsets are supported. + + * atom feeds from git-web said "10" for the month of November. + + * a memory leak in commit walker was plugged. + + * When git-send-email inserted the original author's From: + address in body, it did not mark the message with + Content-type: as needed. + + * git-revert and git-cherry-pick incorrectly refused to start + when the work tree was dirty. + + * git-clean did not honor core.excludesfile configuration. + + * git-add mishandled ".gitignore" files when applying them to + subdirectories. + + * While importing a too branchy history, git-fastimport did not + honor delta depth limit properly. + + * Support for zlib implementations that lack ZLIB_VERNUM and definition + of deflateBound() has been added. + + * Quite a lot of documentation clarifications. diff --git a/Documentation/RelNotes/1.5.3.7.txt b/Documentation/RelNotes/1.5.3.7.txt new file mode 100644 index 0000000..2f69061 --- /dev/null +++ b/Documentation/RelNotes/1.5.3.7.txt @@ -0,0 +1,45 @@ +GIT v1.5.3.7 Release Notes +========================== + +Fixes since v1.5.3.6 +-------------------- + + * git-send-email added 8-bit contents to the payload without + marking it as 8-bit in a CTE header. + + * "git-bundle create a.bndl HEAD" dereferenced the symref and + did not record the ref as 'HEAD'; this prevented a bundle + from being used as a normal source of git-clone. + + * The code to reject nonsense command line of the form + "git-commit -a paths..." and "git-commit --interactive + paths..." were broken. + + * Adding a signature that is not ASCII-only to an original + commit that is ASCII-only would make the result non-ASCII. + "git-format-patch -s" did not mark such a message correctly + with MIME encoding header. + + * git-add sometimes did not mark the resulting index entry + stat-clean. This affected only cases when adding the + contents with the same length as the previously staged + contents, and the previous staging made the index entry + "racily clean". + + * git-commit did not honor GIT_INDEX_FILE the user had in the + environment. + + * When checking out a revision, git-checkout did not report where the + updated HEAD is if you happened to have a file called HEAD in the + work tree. + + * "git-rev-list --objects" mishandled a tree that points at a + submodule. + + * "git cvsimport" was not ready for packed refs that "git gc" can + produce and gave incorrect results. + + * Many scripted Porcelains were confused when you happened to have a + file called "HEAD" in your work tree. + +Also it contains updates to the user manual and documentation. diff --git a/Documentation/RelNotes/1.5.3.8.txt b/Documentation/RelNotes/1.5.3.8.txt new file mode 100644 index 0000000..0e3ff58 --- /dev/null +++ b/Documentation/RelNotes/1.5.3.8.txt @@ -0,0 +1,25 @@ +GIT v1.5.3.8 Release Notes +========================== + +Fixes since v1.5.3.7 +-------------------- + + * Some documentation used "email.com" as an example domain. + + * git-svn fix to handle funky branch and project names going over + http/https correctly. + + * git-svn fix to tone down a needlessly alarming warning message. + + * git-clone did not correctly report errors while fetching over http. + + * git-send-email added redundant Message-Id: header to the outgoing + e-mail when the patch text already had one. + + * a read-beyond-end-of-buffer bug in configuration file updater was fixed. + + * git-grep used to show the same hit repeatedly for unmerged paths. + + * After amending the patch title in "git-am -i", the command did not + report the patch it applied with the updated title. + diff --git a/Documentation/RelNotes/1.5.3.txt b/Documentation/RelNotes/1.5.3.txt new file mode 100644 index 0000000..0668d3c --- /dev/null +++ b/Documentation/RelNotes/1.5.3.txt @@ -0,0 +1,366 @@ +GIT v1.5.3 Release Notes +======================== + +Updates since v1.5.2 +-------------------- + +* The commit walkers other than http are officially deprecated, + but still supported for now. + +* The submodule support has Porcelain layer. + + Note that the current submodule support is minimal and this is + deliberately so. A design decision we made is that operations + at the supermodule level do not recurse into submodules by + default. The expectation is that later we would add a + mechanism to tell git which submodules the user is interested + in, and this information might be used to determine the + recursive behaviour of certain commands (e.g. "git checkout" + and "git diff"), but currently we haven't agreed on what that + mechanism should look like. Therefore, if you use submodules, + you would probably need "git submodule update" on the + submodules you care about after running a "git checkout" at + the supermodule level. + +* There are a handful pack-objects changes to help you cope better + with repositories with pathologically large blobs in them. + +* For people who need to import from Perforce, a front-end for + fast-import is in contrib/fast-import/. + +* Comes with git-gui 0.8.2. + +* Comes with updated gitk. + +* New commands and options. + + - "git log --date=<format>" can use more formats: iso8601, rfc2822. + + - The hunk header output from "git diff" family can be customized + with the attributes mechanism. See gitattributes(5) for details. + + - "git stash" allows you to quickly save away your work in + progress and replay it later on an updated state. + + - "git rebase" learned an "interactive" mode that let you + pick and reorder which commits to rebuild. + + - "git fsck" can save its findings in $GIT_DIR/lost-found, without a + separate invocation of "git lost-found" command. The blobs stored by + lost-found are stored in plain format to allow you to grep in them. + + - $GIT_WORK_TREE environment variable can be used together with + $GIT_DIR to work in a subdirectory of a working tree that is + not located at "$GIT_DIR/..". + + - Giving "--file=<file>" option to "git config" is the same as + running the command with GIT_CONFIG=<file> environment. + + - "git log" learned a new option "--follow", to follow + renaming history of a single file. + + - "git filter-branch" lets you rewrite the revision history of + specified branches. You can specify a number of filters to + modify the commits, files and trees. + + - "git cvsserver" learned new options (--base-path, --export-all, + --strict-paths) inspired by "git daemon". + + - "git daemon --base-path-relaxed" can help migrating a repository URL + that did not use to use --base-path to use --base-path. + + - "git commit" can use "-t templatefile" option and commit.template + configuration variable to prime the commit message given to you in the + editor. + + - "git submodule" command helps you manage the projects from + the superproject that contain them. + + - In addition to core.compression configuration option, + core.loosecompression and pack.compression options can + independently tweak zlib compression levels used for loose + and packed objects. + + - "git ls-tree -l" shows size of blobs pointed at by the + tree entries, similar to "/bin/ls -l". + + - "git rev-list" learned --regexp-ignore-case and + --extended-regexp options to tweak its matching logic used + for --grep filtering. + + - "git describe --contains" is a handier way to call more + obscure command "git name-rev --tags". + + - "git gc --aggressive" tells the command to spend more cycles + to optimize the repository harder. + + - "git repack" learned a "window-memory" limit which + dynamically reduces the window size to stay within the + specified memory usage. + + - "git repack" can be told to split resulting packs to avoid + exceeding limit specified with "--max-pack-size". + + - "git fsck" gained --verbose option. This is really really + verbose but it might help you identify exact commit that is + corrupt in your repository. + + - "git format-patch" learned --numbered-files option. This + may be useful for MH users. + + - "git format-patch" learned format.subjectprefix configuration + variable, which serves the same purpose as "--subject-prefix" + option. + + - "git tag -n -l" shows tag annotations while listing tags. + + - "git cvsimport" can optionally use the separate-remote layout. + + - "git blame" can be told to see through commits that change + whitespaces and indentation levels with "-w" option. + + - "git send-email" can be told not to thread the messages when + sending out more than one patches. + + - "git send-email" can also be told how to find whom to cc the + message to for each message via --cc-cmd. + + - "git config" learned NUL terminated output format via -z to + help scripts. + + - "git add" learned "--refresh <paths>..." option to selectively refresh + the cached stat information. + + - "git init -q" makes the command quieter. + + - "git -p command" now has a cousin of opposite sex, "git --no-pager + command". + +* Updated behavior of existing commands. + + - "gitweb" can offer multiple snapshot formats. + + ***NOTE*** Unfortunately, this changes the format of the + $feature{snapshot}{default} entry in the per-site + configuration file 'gitweb_config.perl'. It used to be a + three-element tuple that describe a single format; with the + new configuration item format, you only have to say the name + of the format ('tgz', 'tbz2' or 'zip'). Please update the + your configuration file accordingly. + + - "git clone" uses -l (hardlink files under .git) by default when + cloning locally. + + - URL used for "git clone" and friends can specify nonstandard SSH port + by using ssh://host:port/path/to/repo syntax. + + - "git bundle create" can now create a bundle without negative refs, + i.e. "everything since the beginning up to certain points". + + - "git diff" (but not the plumbing level "git diff-tree") now + recursively descends into trees by default. + + - "git diff" does not show differences that come only from + stat-dirtiness in the form of "diff --git" header anymore. + It runs "update-index --refresh" silently as needed. + + - "git tag -l" used to match tags by globbing its parameter as if it + has wildcard '*' on both ends, which made "git tag -l gui" to match + tag 'gitgui-0.7.0'; this was very annoying. You now have to add + asterisk on the sides you want to wildcard yourself. + + - The editor to use with many interactive commands can be + overridden with GIT_EDITOR environment variable, or if it + does not exist, with core.editor configuration variable. As + before, if you have neither, environment variables VISUAL + and EDITOR are consulted in this order, and then finally we + fall back on "vi". + + - "git rm --cached" does not complain when removing a newly + added file from the index anymore. + + - Options to "git log" to affect how --grep/--author options look for + given strings now have shorter abbreviations. -i is for ignore case, + and -E is for extended regexp. + + - "git log" learned --log-size to show the number of bytes in + the log message part of the output to help qgit. + + - "git log --name-status" does not require you to give "-r" anymore. + As a general rule, Porcelain commands should recurse when showing + diff. + + - "git format-patch --root A" can be used to format everything + since the beginning up to A. This was supported with + "git format-patch --root A A" for a long time, but was not + properly documented. + + - "git svn dcommit" retains local merge information. + + - "git svnimport" allows an empty string to be specified as the + trunk/ directory. This is necessary to suck data from a SVN + repository that doe not have trunk/ branches/ and tags/ organization + at all. + + - "git config" to set values also honors type flags like --bool + and --int. + + - core.quotepath configuration can be used to make textual git + output to emit most of the characters in the path literally. + + - "git mergetool" chooses its backend more wisely, taking + notice of its environment such as use of X, Gnome/KDE, etc. + + - "gitweb" shows merge commits a lot nicer than before. The + default view uses more compact --cc format, while the UI + allows to choose normal diff with any parent. + + - snapshot files "gitweb" creates from a repository at + $path/$project/.git are more useful. We use $project part + in the filename, which we used to discard. + + - "git cvsimport" creates lightweight tags; there is no + interesting information we can record in an annotated tag, + and the handcrafted ones the old code created was not + properly formed anyway. + + - "git push" pretends that you immediately fetched back from + the remote by updating corresponding remote tracking + branches if you have any. + + - The diffstat given after a merge (or a pull) honors the + color.diff configuration. + + - "git commit --amend" is now compatible with various message source + options such as -m/-C/-c/-F. + + - "git apply --whitespace=strip" removes blank lines added at + the end of the file. + + - "git fetch" over git native protocols with "-v" option shows + connection status, and the IP address of the other end, to + help diagnosing problems. + + - We used to have core.legacyheaders configuration, when + set to false, allowed git to write loose objects in a format + that mimics the format used by objects stored in packs. It + turns out that this was not so useful. Although we will + continue to read objects written in that format, we do not + honor that configuration anymore and create loose objects in + the legacy/traditional format. + + - "--find-copies-harder" option to diff family can now be + spelled as "-C -C" for brevity. + + - "git mailsplit" (hence "git am") can read from Maildir + formatted mailboxes. + + - "git cvsserver" does not barf upon seeing "cvs login" + request. + + - "pack-objects" honors "delta" attribute set in + .gitattributes. It does not attempt to deltify blobs that + come from paths with delta attribute set to false. + + - "new-workdir" script (in contrib) can now be used with a + bare repository. + + - "git mergetool" learned to use gvimdiff. + + - "gitview" (in contrib) has a better blame interface. + + - "git log" and friends did not handle a commit log message + that is larger than 16kB; they do now. + + - "--pretty=oneline" output format for "git log" and friends + deals with "malformed" commit log messages that have more + than one lines in the first paragraph better. We used to + show the first line, cutting the title at mid-sentence; we + concatenate them into a single line and treat the result as + "oneline". + + - "git p4import" has been demoted to contrib status. For + a superior option, checkout the "git p4" front end to + "git fast-import" (also in contrib). The man page and p4 + rpm have been removed as well. + + - "git mailinfo" (hence "am") now tries to see if the message + is in utf-8 first, instead of assuming iso-8859-1, if + incoming e-mail does not say what encoding it is in. + +* Builds + + - old-style function definitions (most notably, a function + without parameter defined with "func()", not "func(void)") + have been eradicated. + + - "git tag" and "git verify-tag" have been rewritten in C. + +* Performance Tweaks + + - "git pack-objects" avoids re-deltification cost by caching + small enough delta results it creates while looking for the + best delta candidates. + + - "git pack-objects" learned a new heuristic to prefer delta + that is shallower in depth over the smallest delta + possible. This improves both overall packfile access + performance and packfile density. + + - diff-delta code that is used for packing has been improved + to work better on big files. + + - when there are more than one pack files in the repository, + the runtime used to try finding an object always from the + newest packfile; it now tries the same packfile as we found + the object requested the last time, which exploits the + locality of references. + + - verifying pack contents done by "git fsck --full" got boost + by carefully choosing the order to verify objects in them. + + - "git read-tree -m" to read into an already populated index + has been optimized vastly. The effect of this can be seen + when switching branches that have differences in only a + handful paths. + + - "git add paths..." and "git commit paths..." has also been + heavily optimized. + +Fixes since v1.5.2 +------------------ + +All of the fixes in v1.5.2 maintenance series are included in +this release, unless otherwise noted. + +* Bugfixes + + - "gitweb" had trouble handling non UTF-8 text with older + Encode.pm Perl module. + + - "git svn" misparsed the data from the commits in the repository when + the user had "color.diff = true" in the configuration. This has been + fixed. + + - There was a case where "git svn dcommit" clobbered changes made on the + SVN side while committing multiple changes. + + - "git-write-tree" had a bad interaction with racy-git avoidance and + gitattributes mechanisms. + + - "git --bare command" overrode existing GIT_DIR setting and always + made it treat the current working directory as GIT_DIR. + + - "git ls-files --error-unmatch" does not complain if you give the + same path pattern twice by mistake. + + - "git init" autodetected core.filemode but not core.symlinks, which + made a new directory created automatically by "git clone" cumbersome + to use on filesystems that require these configurations to be set. + + - "git log" family of commands behaved differently when run as "git + log" (no pathspec) and as "git log --" (again, no pathspec). This + inconsistency was introduced somewhere in v1.3.0 series but now has + been corrected. + + - "git rebase -m" incorrectly displayed commits that were skipped. diff --git a/Documentation/RelNotes/1.5.4.1.txt b/Documentation/RelNotes/1.5.4.1.txt new file mode 100644 index 0000000..d4e44b8 --- /dev/null +++ b/Documentation/RelNotes/1.5.4.1.txt @@ -0,0 +1,17 @@ +GIT v1.5.4.1 Release Notes +========================== + +Fixes since v1.5.4 +------------------ + + * "git-commit -C $tag" used to work but rewrite in C done in + 1.5.4 broke it. + + * An entry in the .gitattributes file that names a pattern in a + subdirectory of the directory it is in did not match + correctly (e.g. pattern "b/*.c" in "a/.gitattributes" should + match "a/b/foo.c" but it didn't). + + * Customized color specification was parsed incorrectly when + numeric color values are used. This was fixed in 1.5.4.1. + diff --git a/Documentation/RelNotes/1.5.4.2.txt b/Documentation/RelNotes/1.5.4.2.txt new file mode 100644 index 0000000..21d0df5 --- /dev/null +++ b/Documentation/RelNotes/1.5.4.2.txt @@ -0,0 +1,43 @@ +GIT v1.5.4.2 Release Notes +========================== + +Fixes since v1.5.4 +------------------ + + * The configuration parser was not prepared to see string + valued variables misspelled as boolean and segfaulted. + + * Temporary files left behind due to interrupted object + transfers were not cleaned up with "git prune". + + * "git config --unset" was confused when the unset variables + were spelled with continuation lines in the config file. + + * The merge message detection in "git cvsimport" did not catch + a message that began with "Merge...". + + * "git status" suggests "git rm --cached" for unstaging the + earlier "git add" before the initial commit. + + * "git status" output was incorrect during a partial commit. + + * "git bisect" refused to start when the HEAD was detached. + + * "git bisect" allowed a wildcard character in the commit + message expanded while writing its log file. + + * Manual pages were not formatted correctly with docbook xsl + 1.72; added a workaround. + + * "git-commit -C $tag" used to work but rewrite in C done in + 1.5.4 broke it. This was fixed in 1.5.4.1. + + * An entry in the .gitattributes file that names a pattern in a + subdirectory of the directory it is in did not match + correctly (e.g. pattern "b/*.c" in "a/.gitattributes" should + match "a/b/foo.c" but it didn't). This was fixed in 1.5.4.1. + + * Customized color specification was parsed incorrectly when + numeric color values are used. This was fixed in 1.5.4.1. + + * http transport misbehaved when linked with curl-gnutls. diff --git a/Documentation/RelNotes/1.5.4.3.txt b/Documentation/RelNotes/1.5.4.3.txt new file mode 100644 index 0000000..b0fc67f --- /dev/null +++ b/Documentation/RelNotes/1.5.4.3.txt @@ -0,0 +1,27 @@ +GIT v1.5.4.3 Release Notes +========================== + +Fixes since v1.5.4.2 +-------------------- + + * RPM spec used to pull in everything with 'git'. This has been + changed so that 'git' package contains just the core parts, + and we now supply 'git-all' metapackage to slurp in everything. + This should match end user's expectation better. + + * When some refs failed to update, git-push reported "failure" + which was unclear if some other refs were updated or all of + them failed atomically (the answer is the former). Reworded + the message to clarify this. + + * "git clone" from a repository whose HEAD was misconfigured + did not set up the remote properly. Now it tries to do + better. + + * Updated git-push documentation to clarify what "matching" + means, in order to reduce user confusion. + + * Updated git-add documentation to clarify "add -u" operates in + the current subdirectory you are in, just like other commands. + + * git-gui updates to work on OSX and Windows better. diff --git a/Documentation/RelNotes/1.5.4.4.txt b/Documentation/RelNotes/1.5.4.4.txt new file mode 100644 index 0000000..323c1a8 --- /dev/null +++ b/Documentation/RelNotes/1.5.4.4.txt @@ -0,0 +1,66 @@ +GIT v1.5.4.4 Release Notes +========================== + +Fixes since v1.5.4.3 +-------------------- + + * Building and installing with an overtight umask such as 077 made + installed templates unreadable by others, while the rest of the install + are done in a way that is friendly to umask 022. + + * "git cvsexportcommit -w $cvsdir" misbehaved when GIT_DIR is set to a + relative directory. + + * "git http-push" had an invalid memory access that could lead it to + segfault. + + * When "git rebase -i" gave control back to the user for a commit that is + marked to be edited, it just said "modify it with commit --amend", + without saying what to do to continue after modifying it. Give an + explicit instruction to run "rebase --continue" to be more helpful. + + * "git send-email" in 1.5.4.3 issued a bogus empty In-Reply-To: header. + + * "git bisect" showed mysterious "won't bisect on seeked tree" error message. + This was leftover from Cogito days to prevent "bisect" starting from a + cg-seeked state. We still keep the Cogito safety, but running "git bisect + start" when another bisect was in effect will clean up and start over. + + * "git push" with an explicit PATH to receive-pack did not quite work if + receive-pack was not on usual PATH. We earlier fixed the same issue + with "git fetch" and upload-pack, but somehow forgot to do so in the + other direction. + + * git-gui's info dialog was not displayed correctly when the user tries + to commit nothing (i.e. without staging anything). + + * "git revert" did not properly fail when attempting to run with a + dirty index. + + * "git merge --no-commit --no-ff <other>" incorrectly made commits. + + * "git merge --squash --no-ff <other>", which is a nonsense combination + of options, was not rejected. + + * "git ls-remote" and "git remote show" against an empty repository + failed, instead of just giving an empty result (regression). + + * "git fast-import" did not handle a renamed path whose name needs to be + quoted, due to a bug in unquote_c_style() function. + + * "git cvsexportcommit" was confused when multiple files with the same + basename needed to be pushed out in the same commit. + + * "git daemon" did not send early errors to syslog. + + * "git log --merge" did not work well with --left-right option. + + * "git svn" prompted for client cert password every time it accessed the + server. + + * The reset command in "git fast-import" data stream was documented to + end with an optional LF, but it actually required one. + + * "git svn dcommit/rebase" did not honor --rewrite-root option. + +Also included are a handful documentation updates. diff --git a/Documentation/RelNotes/1.5.4.5.txt b/Documentation/RelNotes/1.5.4.5.txt new file mode 100644 index 0000000..bbd130e --- /dev/null +++ b/Documentation/RelNotes/1.5.4.5.txt @@ -0,0 +1,56 @@ +GIT v1.5.4.5 Release Notes +========================== + +Fixes since v1.5.4.4 +-------------------- + + * "git fetch there" when the URL information came from the Cogito style + branches/there file did not update refs/heads/there (regression in + 1.5.4). + + * Bogus refspec configuration such as "remote.there.fetch = =" were not + detected as errors (regression in 1.5.4). + + * You couldn't specify a custom editor whose path contains a whitespace + via GIT_EDITOR (and core.editor). + + * The subdirectory filter to "git filter-branch" mishandled a history + where the subdirectory becomes empty and then later becomes non-empty. + + * "git shortlog" gave an empty line if the original commit message was + malformed (e.g. a botched import from foreign SCM). Now it finds the + first non-empty line and uses it for better information. + + * When the user fails to give a revision parameter to "git svn", an error + from the Perl interpreter was issued because the script lacked proper + error checking. + + * After "git rebase" stopped due to conflicts, if the user played with + "git reset" and friends, "git rebase --abort" failed to go back to the + correct commit. + + * Additional work trees prepared with git-new-workdir (in contrib/) did + not share git-svn metadata directory .git/svn with the original. + + * "git-merge-recursive" did not mark addition of the same path with + different filemodes correctly as a conflict. + + * "gitweb" gave malformed URL when pathinfo stype paths are in use. + + * "-n" stands for "--no-tags" again for "git fetch". + + * "git format-patch" did not detect the need to add 8-bit MIME header + when the user used format.header configuration. + + * "rev~" revision specifier used to mean "rev", which was inconsistent + with how "rev^" worked. Now "rev~" is the same as "rev~1" (hence it + also is the same as "rev^1"), and "rev~0" is the same as "rev^0" + (i.e. it has to be a commit). + + * "git quiltimport" did not grok empty lines, lines in "file -pNNN" + format to specify the prefix levels and lines with trailing comments. + + * "git rebase -m" triggered pre-commit verification, which made + "rebase --continue" impossible. + +As usual, it also comes with many documentation fixes and clarifications. diff --git a/Documentation/RelNotes/1.5.4.6.txt b/Documentation/RelNotes/1.5.4.6.txt new file mode 100644 index 0000000..3e3c3e5 --- /dev/null +++ b/Documentation/RelNotes/1.5.4.6.txt @@ -0,0 +1,43 @@ +GIT v1.5.4.6 Release Notes +========================== + +I personally do not think there is any reason anybody should want to +run v1.5.4.X series these days, because 'master' version is always +more stable than any tagged released version of git. + +This is primarily to futureproof "git-shell" to accept requests +without a dash between "git" and subcommand name (e.g. "git +upload-pack") which the newer client will start to make sometime in +the future. + +Fixes since v1.5.4.5 +-------------------- + + * Command line option "-n" to "git-repack" was not correctly parsed. + + * Error messages from "git-apply" when the patchfile cannot be opened + have been improved. + + * Error messages from "git-bisect" when given nonsense revisions have + been improved. + + * reflog syntax that uses time e.g. "HEAD@{10 seconds ago}:path" did not + stop parsing at the closing "}". + + * "git rev-parse --symbolic-full-name ^master^2" printed solitary "^", + but it should print nothing. + + * "git apply" did not enforce "match at the beginning" correctly. + + * a path specification "a/b" in .gitattributes file should not match + "sub/a/b", but it did. + + * "git log --date-order --topo-order" did not override the earlier + date-order with topo-order as expected. + + * "git fast-export" did not export octopus merges correctly. + + * "git archive --prefix=$path/" mishandled gitattributes. + +As usual, it also comes with many documentation fixes and clarifications. + diff --git a/Documentation/RelNotes/1.5.4.7.txt b/Documentation/RelNotes/1.5.4.7.txt new file mode 100644 index 0000000..9065a0e --- /dev/null +++ b/Documentation/RelNotes/1.5.4.7.txt @@ -0,0 +1,10 @@ +GIT v1.5.4.7 Release Notes +========================== + +Fixes since 1.5.4.7 +------------------- + + * Removed support for an obsolete gitweb request URI, whose + implementation ran "git diff" Porcelain, instead of using plumbing, + which would have run an external diff command specified in the + repository configuration as the gitweb user. diff --git a/Documentation/RelNotes/1.5.4.txt b/Documentation/RelNotes/1.5.4.txt new file mode 100644 index 0000000..f1323b6 --- /dev/null +++ b/Documentation/RelNotes/1.5.4.txt @@ -0,0 +1,377 @@ +GIT v1.5.4 Release Notes +======================== + +Removal +------- + + * "git svnimport" was removed in favor of "git svn". It is still there + in the source tree (contrib/examples) but unsupported. + + * As git-commit and git-status have been rewritten, "git runstatus" + helper script lost all its users and has been removed. + + +Temporarily disabled +-------------------- + + * "git http-push" is known not to work well with cURL library older + than 7.16, and we had reports of repository corruption. It is + disabled on such platforms for now. Unfortunately, 1.5.3.8 shares + the same issue. In other words, this does not mean you will be + fine if you stick to an older git release. For now, please do not + use http-push from older git with cURL older than 7.16 if you + value your data. A proper fix will hopefully materialize in + later versions. + + +Deprecation notices +------------------- + + * From v1.6.0, git will by default install dashed form of commands + (e.g. "git-commit") outside of users' normal $PATH, and will install + only selected commands ("git" itself, and "gitk") in $PATH. This + implies: + + - Using dashed forms of git commands (e.g. "git-commit") from the + command line has been informally deprecated since early 2006, but + now it officially is, and will be removed in the future. Use + dash-less forms (e.g. "git commit") instead. + + - Using dashed forms from your scripts, without first prepending the + return value from "git --exec-path" to the scripts' PATH, has been + informally deprecated since early 2006, but now it officially is. + + - Use of dashed forms with "PATH=$(git --exec-path):$PATH; export + PATH" early in your script is not deprecated with this change. + + Users are strongly encouraged to adjust their habits and scripts now + to prepare for this change. + + * The post-receive hook was introduced in March 2007 to supersede + the post-update hook, primarily to overcome the command line length + limitation of the latter. Use of post-update hook will be deprecated + in future versions of git, starting from v1.6.0. + + * "git lost-found" was deprecated in favor of "git fsck"'s --lost-found + option, and will be removed in the future. + + * "git peek-remote" is deprecated, as "git ls-remote" was written in C + and works for all transports; "git peek-remote" will be removed in + the future. + + * "git repo-config" which was an old name for "git config" command + has been supported without being advertised for a long time. The + next feature release will remove it. + + * From v1.6.0, the repack.usedeltabaseoffset config option will default + to true, which will give denser packfiles (i.e. more efficient storage). + The downside is that git older than version 1.4.4 will not be able + to directly use a repository packed using this setting. + + * From v1.6.0, the pack.indexversion config option will default to 2, + which is slightly more efficient, and makes repacking more immune to + data corruptions. Git older than version 1.5.2 may revert to version 1 + of the pack index with a manual "git index-pack" to be able to directly + access corresponding pack files. + + +Updates since v1.5.3 +-------------------- + + * Comes with much improved gitk, with i18n. + + * Comes with git-gui 0.9.2 with i18n. + + * gitk is now merged as a subdirectory of git.git project, in + preparation for its i18n. + + * progress displays from many commands are a lot nicer to the eye. + Transfer commands show throughput data. + + * many commands that pay attention to per-directory .gitignore now do + so lazily, which makes the usual case go much faster. + + * Output processing for '--pretty=format:<user format>' has been + optimized. + + * Rename detection of diff family while detecting exact matches has + been greatly optimized. + + * Rename detection of diff family tries to make more natural looking + pairing. Earlier, if multiple identical rename sources were + found in the preimage, the source used was picked pretty much at random. + + * Value "true" for color.diff and color.status configuration used to + mean "always" (even when the output is not going to a terminal). + This has been corrected to mean the same thing as "auto". + + * "git diff" Porcelain now respects diff.external configuration, which + is another way to specify GIT_EXTERNAL_DIFF. + + * "git diff" can be told to use different prefixes other than + "a/" and "b/" e.g. "git diff --src-prefix=l/ --dst-prefix=k/". + + * "git diff" sometimes did not quote paths with funny + characters properly. + + * "git log" (and any revision traversal commands) misbehaved + when --diff-filter is given but was not asked to actually + produce diff. + + * HTTP proxy can be specified per remote repository using + remote.*.httpproxy configuration, or global http.proxy configuration + variable. + + * Various Perforce importer updates. + + * Example update and post-receive hooks have been improved. + + * Any command that wants to take a commit object name can now use + ":/string" syntax to name a commit. + + * "git reset" is now built-in and its output can be squelched with -q. + + * "git reset --hard" does not make any sense in a bare + repository, but did not error out; fixed. + + * "git send-email" can optionally talk over ssmtp and use SMTP-AUTH. + + * "git rebase" learned --whitespace option. + + * In "git rebase", when you decide not to replay a particular change + after the command stopped with a conflict, you can say "git rebase + --skip" without first running "git reset --hard", as the command now + runs it for you. + + * "git rebase --interactive" mode can now work on detached HEAD. + + * Other minor to serious bugs in "git rebase -i" have been fixed. + + * "git rebase" now detaches head during its operation, so after a + successful "git rebase" operation, the reflog entry branch@{1} for + the current branch points at the commit before the rebase was + started. + + * "git rebase -i" also triggers rerere to help your repeated merges. + + * "git merge" can call the "post-merge" hook. + + * "git pack-objects" can optionally run deltification with multiple + threads. + + * "git archive" can optionally substitute keywords in files marked with + export-subst attribute. + + * "git cherry-pick" made a misguided attempt to repeat the original + command line in the generated log message, when told to cherry-pick a + commit by naming a tag that points at it. It does not anymore. + + * "git for-each-ref" learned %(xxxdate:<date-format>) syntax to show the + various date fields in different formats. + + * "git gc --auto" is a low-impact way to automatically run a variant of + "git repack" that does not lose unreferenced objects (read: safer + than the usual one) after the user accumulates too many loose + objects. + + * "git clean" has been rewritten in C. + + * You need to explicitly set clean.requireForce to "false" to allow + "git clean" without -f to do any damage (lack of the configuration + variable used to mean "do not require -f option to lose untracked + files", but we now use the safer default). + + * The kinds of whitespace errors "git diff" and "git apply" notice (and + fix) can be controlled via 'core.whitespace' configuration variable + and 'whitespace' attribute in .gitattributes file. + + * "git push" learned --dry-run option to show what would happen if a + push is run. + + * "git push" does not update a tracking ref on the local side when the + remote refused to update the corresponding ref. + + * "git push" learned --mirror option. This is to push the local refs + one-to-one to the remote, and deletes refs from the remote that do + not exist anymore in the repository on the pushing side. + + * "git push" can remove a corrupt ref at the remote site with the usual + ":ref" refspec. + + * "git remote" knows --mirror mode. This is to set up configuration to + push into a remote repository to store local branch heads to the same + branch on the remote side, and remove branch heads locally removed + from local repository at the same time. Suitable for pushing into a + back-up repository. + + * "git remote" learned "rm" subcommand. + + * "git cvsserver" can be run via "git shell". Also, "cvs" is + recognized as a synonym for "git cvsserver", so that CVS users + can be switched to git just by changing their login shell. + + * "git cvsserver" acts more like receive-pack by running post-receive + and post-update hooks. + + * "git am" and "git rebase" are far less verbose. + + * "git pull" learned to pass --[no-]ff option to underlying "git + merge". + + * "git pull --rebase" is a different way to integrate what you fetched + into your current branch. + + * "git fast-export" produces data-stream that can be fed to fast-import + to reproduce the history recorded in a git repository. + + * "git add -i" takes pathspecs to limit the set of files to work on. + + * "git add -p" is a short-hand to go directly to the selective patch + subcommand in the interactive command loop and to exit when done. + + * "git add -i" UI has been colorized. The interactive prompt + and menu can be colored by setting color.interactive + configuration. The diff output (including the hunk picker) + are colored with color.diff configuration. + + * "git commit --allow-empty" allows you to create a single-parent + commit that records the same tree as its parent, overriding the usual + safety valve. + + * "git commit --amend" can amend a merge that does not change the tree + from its first parent. + + * "git commit" used to unconditionally strip comment lines that + began with '#' and removed excess blank lines. This behavior has + been made configurable. + + * "git commit" has been rewritten in C. + + * "git stash random-text" does not create a new stash anymore. It was + a UI mistake. Use "git stash save random-text", or "git stash" + (without extra args) for that. + + * "git stash clear extra-text" does not clear the whole stash + anymore. It is tempting to expect "git stash clear stash@{2}" + to drop only a single named stash entry, and it is rude to + discard everything when that is asked (but not provided). + + * "git prune --expire <time>" can exempt young loose objects from + getting pruned. + + * "git branch --contains <commit>" can list branches that are + descendants of a given commit. + + * "git log" learned --early-output option to help interactive GUI + implementations. + + * "git bisect" learned "skip" action to mark untestable commits. + + * "git bisect visualize" learned a shorter synonym "git bisect view". + + * "git bisect visualize" runs "git log" in a non-windowed + environments. It also can be told what command to run (e.g. "git + bisect visualize tig"). + + * "git format-patch" learned "format.numbered" configuration variable + to automatically turn --numbered option on when more than one commits + are formatted. + + * "git ls-files" learned "--exclude-standard" to use the canned set of + exclude files. + + * "git tag -a -f existing" begins the editor session using the existing + annotation message. + + * "git tag -m one -m bar" (multiple -m options) behaves similarly to + "git commit"; the parameters to -m options are formatted as separate + paragraphs. + + * The format "git show" outputs an annotated tag has been updated to + include "Tagger: " and "Date: " lines from the tag itself. Strictly + speaking this is a backward incompatible change, but this is a + reasonable usability fix and people's scripts shouldn't have been + relying on the exact output from "git show" Porcelain anyway. + + * "git cvsimport" did not notice errors from underlying "cvsps" + and produced a corrupt import silently. + + * "git cvsexportcommit" learned -w option to specify and switch to the + CVS working directory. + + * "git checkout" from a subdirectory learned to use "../path" to allow + checking out a path outside the current directory without cd'ing up. + + * "git checkout" from and to detached HEAD leaves a bit more + information in the reflog. + + * "git send-email --dry-run" shows full headers for easier diagnosis. + + * "git merge-ours" is now built-in. + + * "git svn" learned "info" and "show-externals" subcommands. + + * "git svn" run from a subdirectory failed to read settings from the + .git/config. + + * "git svn" learned --use-log-author option, which picks up more + descriptive name from From: and Signed-off-by: lines in the commit + message. + + * "git svn" wasted way too much disk to record revision mappings + between svn and git; a new representation that is much more compact + for this information has been introduced to correct this. + + * "git svn" left temporary index files it used without cleaning them + up; this was corrected. + + * "git status" from a subdirectory now shows relative paths, which + makes copy-and-pasting for git-checkout/git-add/git-rm easier. The + traditional behavior to show the full path relative to the top of + the work tree can be had by setting status.relativepaths + configuration variable to false. + + * "git blame" kept text for each annotated revision in core needlessly; + this has been corrected. + + * "git shortlog" learned to default to HEAD when the standard input is + a terminal and the user did not give any revision parameter. + + * "git shortlog" learned "-e" option to show e-mail addresses as well as + authors' names. + + * "git help" learned "-w" option to show documentation in browsers. + + * In addition there are quite a few internal clean-ups. Notably: + + - many fork/exec have been replaced with run-command API, + brought from the msysgit effort. + + - introduction and more use of the option parser API. + + - enhancement and more use of the strbuf API. + + * Makefile tweaks to support HP-UX is in. + +Fixes since v1.5.3 +------------------ + +All of the fixes in v1.5.3 maintenance series are included in +this release, unless otherwise noted. + +These fixes are only in v1.5.4 and not backported to v1.5.3 maintenance +series. + + * The way "git diff --check" behaves is much more consistent with the way + "git apply --whitespace=warn" works. + + * "git svn" talking with the SVN over HTTP will correctly quote branch + and project names. + + * "git config" did not work correctly on platforms that define + REG_NOMATCH to an even number. + + * Recent versions of AsciiDoc 8 has a change to break our + documentation; a workaround has been implemented. + + * "git diff --color-words" colored context lines in a wrong color. diff --git a/Documentation/RelNotes/1.5.5.1.txt b/Documentation/RelNotes/1.5.5.1.txt new file mode 100644 index 0000000..7de4197 --- /dev/null +++ b/Documentation/RelNotes/1.5.5.1.txt @@ -0,0 +1,44 @@ +GIT v1.5.5.1 Release Notes +========================== + +Fixes since v1.5.5 +------------------ + + * "git archive --prefix=$path/" mishandled gitattributes. + + * "git fetch -v" that fetches into FETCH_HEAD did not report the summary + the same way as done for updating the tracking refs. + + * "git svn" misbehaved when the configuration file customized the "git + log" output format using format.pretty. + + * "git submodule status" leaked an unnecessary error message. + + * "git log --date-order --topo-order" did not override the earlier + date-order with topo-order as expected. + + * "git bisect good $this" did not check the validity of the revision + given properly. + + * "url.<there>.insteadOf" did not work correctly. + + * "git clean" ran inside subdirectory behaved as if the directory was + explicitly specified for removal by the end user from the top level. + + * "git bisect" from a detached head leaked an unnecessary error message. + + * "git bisect good $a $b" when $a is Ok but $b is bogus should have + atomically failed before marking $a as good. + + * "git fmt-merge-msg" did not clean up leading empty lines from commit + log messages like "git log" family does. + + * "git am" recorded a commit with empty Subject: line without + complaining. + + * when given a commit log message whose first paragraph consists of + multiple lines, "git rebase" squashed it into a single line. + + * "git remote add $bogus_name $url" did not complain properly. + +Also comes with various documentation updates. diff --git a/Documentation/RelNotes/1.5.5.2.txt b/Documentation/RelNotes/1.5.5.2.txt new file mode 100644 index 0000000..391a7b0 --- /dev/null +++ b/Documentation/RelNotes/1.5.5.2.txt @@ -0,0 +1,27 @@ +GIT v1.5.5.2 Release Notes +========================== + +Fixes since v1.5.5.1 +-------------------- + + * "git repack -n" was mistakenly made no-op earlier. + + * "git imap-send" wanted to always have imap.host even when use of + imap.tunnel made it unnecessary. + + * reflog syntax that uses time e.g. "HEAD@{10 seconds ago}:path" did not + stop parsing at the closing "}". + + * "git rev-parse --symbolic-full-name ^master^2" printed solitary "^", + but it should print nothing. + + * "git commit" did not detect when it failed to write tree objects. + + * "git fetch" sometimes transferred too many objects unnecessarily. + + * a path specification "a/b" in .gitattributes file should not match + "sub/a/b". + + * various gitweb fixes. + +Also comes with various documentation updates. diff --git a/Documentation/RelNotes/1.5.5.3.txt b/Documentation/RelNotes/1.5.5.3.txt new file mode 100644 index 0000000..f22f98b --- /dev/null +++ b/Documentation/RelNotes/1.5.5.3.txt @@ -0,0 +1,12 @@ +GIT v1.5.5.3 Release Notes +========================== + +Fixes since v1.5.5.2 +-------------------- + + * "git send-email --compose" did not notice that non-ascii contents + needed some MIME magic. + + * "git fast-export" did not export octopus merges correctly. + +Also comes with various documentation updates. diff --git a/Documentation/RelNotes/1.5.5.4.txt b/Documentation/RelNotes/1.5.5.4.txt new file mode 100644 index 0000000..2d0279e --- /dev/null +++ b/Documentation/RelNotes/1.5.5.4.txt @@ -0,0 +1,7 @@ +GIT v1.5.5.4 Release Notes +========================== + +Fixes since v1.5.5.4 +-------------------- + + * "git name-rev --all" used to segfault. diff --git a/Documentation/RelNotes/1.5.5.5.txt b/Documentation/RelNotes/1.5.5.5.txt new file mode 100644 index 0000000..30fa361 --- /dev/null +++ b/Documentation/RelNotes/1.5.5.5.txt @@ -0,0 +1,11 @@ +GIT v1.5.5.5 Release Notes +========================== + +I personally do not think there is any reason anybody should want to +run v1.5.5.X series these days, because 'master' version is always +more stable than any tagged released version of git. + +This is primarily to futureproof "git-shell" to accept requests +without a dash between "git" and subcommand name (e.g. "git +upload-pack") which the newer client will start to make sometime in +the future. diff --git a/Documentation/RelNotes/1.5.5.6.txt b/Documentation/RelNotes/1.5.5.6.txt new file mode 100644 index 0000000..d5e85cb --- /dev/null +++ b/Documentation/RelNotes/1.5.5.6.txt @@ -0,0 +1,10 @@ +GIT v1.5.5.6 Release Notes +========================== + +Fixes since 1.5.5.5 +------------------- + + * Removed support for an obsolete gitweb request URI, whose + implementation ran "git diff" Porcelain, instead of using plumbing, + which would have run an external diff command specified in the + repository configuration as the gitweb user. diff --git a/Documentation/RelNotes/1.5.5.txt b/Documentation/RelNotes/1.5.5.txt new file mode 100644 index 0000000..2932212 --- /dev/null +++ b/Documentation/RelNotes/1.5.5.txt @@ -0,0 +1,207 @@ +GIT v1.5.5 Release Notes +======================== + +Updates since v1.5.4 +-------------------- + +(subsystems) + + * Comes with git-gui 0.10.1 + +(portability) + + * We shouldn't ask for BSD group ownership semantics by setting g+s bit + on directories on older BSD systems that refuses chmod() by non root + users. BSD semantics is the default there anyway. + + * Bunch of portability improvement patches coming from an effort to port + to Solaris has been applied. + +(performance) + + * On platforms with suboptimal qsort(3) implementation, there + is an option to use more reasonable substitute we ship with + our software. + + * New configuration variable "pack.packsizelimit" can be used + in place of command line option --max-pack-size. + + * "git fetch" over the native git protocol used to make a + connection to find out the set of current remote refs and + another to actually download the pack data. We now use only + one connection for these tasks. + + * "git commit" does not run lstat(2) more than necessary + anymore. + +(usability, bells and whistles) + + * Bash completion script (in contrib) are aware of more commands and + options. + + * You can be warned when core.autocrlf conversion is applied in + such a way that results in an irreversible conversion. + + * A catch-all "color.ui" configuration variable can be used to + enable coloring of all color-capable commands, instead of + individual ones such as "color.status" and "color.branch". + + * The commands refused to take absolute pathnames where they + require pathnames relative to the work tree or the current + subdirectory. They now can take absolute pathnames in such a + case as long as the pathnames do not refer outside of the + work tree. E.g. "git add $(pwd)/foo" now works. + + * Error messages used to be sent to stderr, only to get hidden, + when $PAGER was in use. They now are sent to stdout along + with the command output to be shown in the $PAGER. + + * A pattern "foo/" in .gitignore file now matches a directory + "foo". Pattern "foo" also matches as before. + + * bash completion's prompt helper function can talk about + operation in-progress (e.g. merge, rebase, etc.). + + * Configuration variables "url.<usethis>.insteadof = <otherurl>" can be + used to tell "git-fetch" and "git-push" to use different URL than what + is given from the command line. + + * "git add -i" behaves better even before you make an initial commit. + + * "git am" refused to run from a subdirectory without a good reason. + + * After "git apply --whitespace=fix" fixes whitespace errors in a patch, + a line before the fix can appear as a context or preimage line in a + later patch, causing the patch not to apply. The command now knows to + see through whitespace fixes done to context lines to successfully + apply such a patch series. + + * "git branch" (and "git checkout -b") to branch from a local branch can + optionally set "branch.<name>.merge" to mark the new branch to build on + the other local branch, when "branch.autosetupmerge" is set to + "always", or when passing the command line option "--track" (this option + was ignored when branching from local branches). By default, this does + not happen when branching from a local branch. + + * "git checkout" to switch to a branch that has "branch.<name>.merge" set + (i.e. marked to build on another branch) reports how much the branch + and the other branch diverged. + + * When "git checkout" has to update a lot of paths, it used to be silent + for 4 seconds before it showed any progress report. It is now a bit + more impatient and starts showing progress report early. + + * "git commit" learned a new hook "prepare-commit-msg" that can + inspect what is going to be committed and prepare the commit + log message template to be edited. + + * "git cvsimport" can now take more than one -M options. + + * "git describe" learned to limit the tags to be used for + naming with --match option. + + * "git describe --contains" now barfs when the named commit + cannot be described. + + * "git describe --exact-match" describes only commits that are tagged. + + * "git describe --long" describes a tagged commit as $tag-0-$sha1, + instead of just showing the exact tagname. + + * "git describe" warns when using a tag whose name and path contradict + with each other. + + * "git diff" learned "--relative" option to limit and output paths + relative to the current directory when working in a subdirectory. + + * "git diff" learned "--dirstat" option to show birds-eye-summary of + changes more concisely than "--diffstat". + + * "git format-patch" learned --cover-letter option to generate a cover + letter template. + + * "git gc" learned --quiet option. + + * "git gc" now automatically prunes unreachable objects that are two + weeks old or older. + + * "git gc --auto" can be disabled more easily by just setting gc.auto + to zero. It also tolerates more packfiles by default. + + * "git grep" now knows "--name-only" is a synonym for the "-l" option. + + * "git help <alias>" now reports "'git <alias>' is alias to <what>", + instead of saying "No manual entry for git-<alias>". + + * "git help" can use different backends to show manual pages and this can + be configured using "man.viewer" configuration. + + * "gitk" does not restore window position from $HOME/.gitk anymore (it + still restores the size). + + * "git log --grep=<what>" learned "--fixed-strings" option to look for + <what> without treating it as a regular expression. + + * "git gui" learned an auto-spell checking. + + * "git push <somewhere> HEAD" and "git push <somewhere> +HEAD" works as + expected; they push the current branch (and only the current branch). + In addition, HEAD can be written as the value of "remote.<there>.push" + configuration variable. + + * When the configuration variable "pack.threads" is set to 0, "git + repack" auto detects the number of CPUs and uses that many threads. + + * "git send-email" learned to prompt for passwords + interactively. + + * "git send-email" learned an easier way to suppress CC + recipients. + + * "git stash" learned "pop" command, that applies the latest stash and + removes it from the stash, and "drop" command to discard the named + stash entry. + + * "git submodule" learned a new subcommand "summary" to show the + symmetric difference between the HEAD version and the work tree version + of the submodule commits. + + * Various "git cvsimport", "git cvsexportcommit", "git cvsserver", + "git svn" and "git p4" improvements. + +(internal) + + * Duplicated code between git-help and git-instaweb that + launches user's preferred browser has been refactored. + + * It is now easier to write test scripts that records known + breakages. + + * "git checkout" is rewritten in C. + + * "git remote" is rewritten in C. + + * Two conflict hunks that are separated by a very short span of common + lines are now coalesced into one larger hunk, to make the result easier + to read. + + * Run-command API's use of file descriptors is documented clearer and + is more consistent now. + + * diff output can be sent to FILE * that is different from stdout. This + will help reimplementing more things in C. + +Fixes since v1.5.4 +------------------ + +All of the fixes in v1.5.4 maintenance series are included in +this release, unless otherwise noted. + + * "git-http-push" did not allow deletion of remote ref with the usual + "push <remote> :<branch>" syntax. + + * "git-rebase --abort" did not go back to the right location if + "git-reset" was run during the "git-rebase" session. + + * "git imap-send" without setting imap.host did not error out but + segfaulted. diff --git a/Documentation/RelNotes/1.5.6.1.txt b/Documentation/RelNotes/1.5.6.1.txt new file mode 100644 index 0000000..4864b16 --- /dev/null +++ b/Documentation/RelNotes/1.5.6.1.txt @@ -0,0 +1,28 @@ +GIT v1.5.6.1 Release Notes +========================== + +Fixes since v1.5.6 +------------------ + +* Last minute change broke loose object creation on AIX. + +* (performance fix) We used to make $GIT_DIR absolute path early in the + programs but keeping it relative to the current directory internally + gives 1-3 per-cent performance boost. + +* bash completion knows the new --graph option to git-log family. + + +* git-diff -c/--cc showed unnecessary "deletion" lines at the context + boundary. + +* git-for-each-ref ignored %(object) and %(type) requests for tag + objects. + +* git-merge usage had a typo. + +* Rebuilding of git-svn metainfo database did not take rewriteRoot + option into account. + +* Running "git-rebase --continue/--skip/--abort" before starting a + rebase gave nonsense error messages. diff --git a/Documentation/RelNotes/1.5.6.2.txt b/Documentation/RelNotes/1.5.6.2.txt new file mode 100644 index 0000000..5902a85 --- /dev/null +++ b/Documentation/RelNotes/1.5.6.2.txt @@ -0,0 +1,40 @@ +GIT v1.5.6.2 Release Notes +========================== + +Futureproof +----------- + + * "git-shell" accepts requests without a dash between "git" and + subcommand name (e.g. "git upload-pack") which the newer client will + start to make sometime in the future. + +Fixes since v1.5.6.1 +-------------------- + +* "git clone" from a remote that is named with url.insteadOf setting in + $HOME/.gitconfig did not work well. + +* "git describe --long --tags" segfaulted when the described revision was + tagged with a lightweight tag. + +* "git diff --check" did not report the result via its exit status + reliably. + +* When remote side used to have branch 'foo' and git-fetch finds that now + it has branch 'foo/bar', it refuses to lose the existing remote tracking + branch and its reflog. The error message has been improved to suggest + pruning the remote if the user wants to proceed and get the latest set + of branches from the remote, including such 'foo/bar'. + +* "git reset file" should mean the same thing as "git reset HEAD file", + but we required disambiguating -- even when "file" is not ambiguous. + +* "git show" segfaulted when an annotated tag that points at another + annotated tag was given to it. + +* Optimization for a large import via "git-svn" introduced in v1.5.6 had a + serious memory and temporary file leak, which made it unusable for + moderately large import. + +* "git-svn" mangled remote nickname used in the configuration file + unnecessarily. diff --git a/Documentation/RelNotes/1.5.6.3.txt b/Documentation/RelNotes/1.5.6.3.txt new file mode 100644 index 0000000..f61dd35 --- /dev/null +++ b/Documentation/RelNotes/1.5.6.3.txt @@ -0,0 +1,52 @@ +GIT v1.5.6.3 Release Notes +========================== + +Fixes since v1.5.6.2 +-------------------- + +* Setting core.sharedrepository to traditional "true" value was supposed to make + the repository group writable but should not affect permission for others. + However, since 1.5.6, it was broken to drop permission for others when umask is + 022, making the repository unreadable by others. + +* Setting GIT_TRACE will report spawning of external process via run_command(). + +* Using an object with very deep delta chain pinned memory needed for extracting + intermediate base objects unnecessarily long, leading to excess memory usage. + +* Bash completion script did not notice '--' marker on the command + line and tried the relatively slow "ref completion" even when + completing arguments after one. + +* Registering a non-empty blob racily and then truncating the working + tree file for it confused "racy-git avoidance" logic into thinking + that the path is now unchanged. + +* The section that describes attributes related to git-archive were placed + in a wrong place in the gitattributes(5) manual page. + +* "git am" was not helpful to the users when it detected that the committer + information is not set up properly yet. + +* "git clone" had a leftover debugging fprintf(). + +* "git clone -q" was not quiet enough as it used to and gave object count + and progress reports. + +* "git clone" marked downloaded packfile with .keep; this could be a + good thing if the remote side is well packed but otherwise not, + especially for a project that is not really big. + +* "git daemon" used to call syslog() from a signal handler, which + could raise signals of its own but generally is not reentrant. This + was fixed by restructuring the code to report syslog() after the handler + returns. + +* When "git push" tries to remove a remote ref, and corresponding + tracking ref is missing, we used to report error (i.e. failure to + remove something that does not exist). + +* "git mailinfo" (hence "git am") did not handle commit log messages in a + MIME multipart mail correctly. + +Contains other various documentation fixes. diff --git a/Documentation/RelNotes/1.5.6.4.txt b/Documentation/RelNotes/1.5.6.4.txt new file mode 100644 index 0000000..d8968f1 --- /dev/null +++ b/Documentation/RelNotes/1.5.6.4.txt @@ -0,0 +1,47 @@ +GIT v1.5.6.4 Release Notes +========================== + +Fixes since v1.5.6.3 +-------------------- + +* Various commands could overflow its internal buffer on a platform + with small PATH_MAX value in a repository that has contents with + long pathnames. + +* There wasn't a way to make --pretty=format:%<> specifiers to honor + .mailmap name rewriting for authors and committers. Now you can with + %aN and %cN. + +* Bash completion wasted too many cycles; this has been optimized to be + usable again. + +* Bash completion lost ref part when completing something like "git show + pu:Makefile". + +* "git-cvsserver" did not clean up its temporary working area after annotate + request. + +* "git-daemon" called syslog() from its signal handler, which was a + no-no. + +* "git-fetch" into an empty repository used to remind that the fetch will + be huge by saying "no common commits", but this was an unnecessary + noise; it is already known by the user anyway. + +* "git-http-fetch" would have segfaulted when pack idx file retrieved + from the other side was corrupt. + +* "git-index-pack" used too much memory when dealing with a deep delta chain. + +* "git-mailinfo" (hence "git-am") did not correctly handle in-body [PATCH] + line to override the commit title taken from the mail Subject header. + +* "git-rebase -i -p" lost parents that are not involved in the history + being rewritten. + +* "git-rm" lost track of where the index file was when GIT_DIR was + specified as a relative path. + +* "git-rev-list --quiet" was not quiet as advertised. + +Contains other various documentation fixes. diff --git a/Documentation/RelNotes/1.5.6.5.txt b/Documentation/RelNotes/1.5.6.5.txt new file mode 100644 index 0000000..47ca172 --- /dev/null +++ b/Documentation/RelNotes/1.5.6.5.txt @@ -0,0 +1,29 @@ +GIT v1.5.6.5 Release Notes +========================== + +Fixes since v1.5.6.4 +-------------------- + +* "git cvsimport" used to spit out "UNKNOWN LINE..." diagnostics to stdout. + +* "git commit -F filename" and "git tag -F filename" run from subdirectories + did not read the right file. + +* "git init --template=" with blank "template" parameter linked files + under root directories to .git, which was a total nonsense. Instead, it + means "I do not want to use anything from the template directory". + +* "git diff-tree" and other diff plumbing ignored diff.renamelimit configuration + variable when the user explicitly asked for rename detection. + +* "git name-rev --name-only" did not work when "--stdin" option was in effect. + +* "git show-branch" mishandled its 8th branch. + +* Addition of "git update-index --ignore-submodules" that happened during + 1.5.6 cycle broke "git update-index --ignore-missing". + +* "git send-email" did not parse charset from an existing Content-type: + header properly. + +Contains other various documentation fixes. diff --git a/Documentation/RelNotes/1.5.6.6.txt b/Documentation/RelNotes/1.5.6.6.txt new file mode 100644 index 0000000..79da23d --- /dev/null +++ b/Documentation/RelNotes/1.5.6.6.txt @@ -0,0 +1,10 @@ +GIT v1.5.6.6 Release Notes +========================== + +Fixes since 1.5.6.5 +------------------- + + * Removed support for an obsolete gitweb request URI, whose + implementation ran "git diff" Porcelain, instead of using plumbing, + which would have run an external diff command specified in the + repository configuration as the gitweb user. diff --git a/Documentation/RelNotes/1.5.6.txt b/Documentation/RelNotes/1.5.6.txt new file mode 100644 index 0000000..e143d8d --- /dev/null +++ b/Documentation/RelNotes/1.5.6.txt @@ -0,0 +1,115 @@ +GIT v1.5.6 Release Notes +======================== + +Updates since v1.5.5 +-------------------- + +(subsystems) + +* Comes with updated gitk and git-gui. + +(portability) + +* git will build on AIX better than before now. + +* core.ignorecase configuration variable can be used to work better on + filesystems that are not case sensitive. + +* "git init" now autodetects the case sensitivity of the filesystem and + sets core.ignorecase accordingly. + +* cpio is no longer used; neither "curl" binary (libcurl is still used). + +(documentation) + +* Many freestanding documentation pages have been converted and made + available to "git help" (aka "man git<something>") as section 7 of + the manual pages. This means bookmarks to some HTML documentation + files may need to be updated (eg "tutorial.html" became + "gittutorial.html"). + +(performance) + +* "git clone" was rewritten in C. This will hopefully help cloning a + repository with insane number of refs. + +* "git rebase --onto $there $from $branch" used to switch to the tip of + $branch only to immediately reset back to $from, smudging work tree + files unnecessarily. This has been optimized. + +* Object creation codepath in "git-svn" has been optimized by enhancing + plumbing commands git-cat-file and git-hash-object. + +(usability, bells and whistles) + +* "git add -p" (and the "patch" subcommand of "git add -i") can choose to + apply (or not apply) mode changes independently from contents changes. + +* "git bisect help" gives longer and more helpful usage information. + +* "git bisect" does not use a special branch "bisect" anymore; instead, it + does its work on a detached HEAD. + +* "git branch" (and "git checkout -b") can be told to set up + branch.<name>.rebase automatically, so that later you can say "git pull" + and magically cause "git pull --rebase" to happen. + +* "git branch --merged" and "git branch --no-merged" can be used to list + branches that have already been merged (or not yet merged) to the + current branch. + +* "git cherry-pick" and "git revert" can add a sign-off. + +* "git commit" mentions the author identity when you are committing + somebody else's changes. + +* "git diff/log --dirstat" output is consistent between binary and textual + changes. + +* "git filter-branch" rewrites signed tags by demoting them to annotated. + +* "git format-patch --no-binary" can produce a patch that lack binary + changes (i.e. cannot be used to propagate the whole changes) meant only + for reviewing. + +* "git init --bare" is a synonym for "git --bare init" now. + +* "git gc --auto" honors a new pre-auto-gc hook to temporarily disable it. + +* "git log --pretty=tformat:<custom format>" gives a LF after each entry, + instead of giving a LF between each pair of entries which is how + "git log --pretty=format:<custom format>" works. + +* "git log" and friends learned the "--graph" option to show the ancestry + graph at the left margin of the output. + +* "git log" and friends can be told to use date format that is different + from the default via 'log.date' configuration variable. + +* "git send-email" now can send out messages outside a git repository. + +* "git send-email --compose" was made aware of rfc2047 quoting. + +* "git status" can optionally include output from "git submodule + summary". + +* "git svn" learned --add-author-from option to propagate the authorship + by munging the commit log message. + +* new object creation and looking up in "git svn" has been optimized. + +* "gitweb" can read from a system-wide configuration file. + +(internal) + +* "git unpack-objects" and "git receive-pack" is now more strict about + detecting breakage in the objects they receive over the wire. + + +Fixes since v1.5.5 +------------------ + +All of the fixes in v1.5.5 maintenance series are included in +this release, unless otherwise noted. + +And there are too numerous small fixes to otherwise note here ;-) diff --git a/Documentation/RelNotes/1.6.0.1.txt b/Documentation/RelNotes/1.6.0.1.txt new file mode 100644 index 0000000..49d7a1c --- /dev/null +++ b/Documentation/RelNotes/1.6.0.1.txt @@ -0,0 +1,36 @@ +GIT v1.6.0.1 Release Notes +========================== + +Fixes since v1.6.0 +------------------ + +* "git diff --cc" did not honor content mangling specified by + gitattributes and core.autocrlf when reading from the work tree. + +* "git diff --check" incorrectly detected new trailing blank lines when + whitespace check was in effect. + +* "git for-each-ref" tried to dereference NULL when asked for '%(body)" on + a tag with a single incomplete line as its payload. + +* "git format-patch" peeked before the beginning of a string when + "format.headers" variable is empty (a misconfiguration). + +* "git help help" did not work correctly. + +* "git mailinfo" (hence "git am") was unhappy when MIME multipart message + contained garbage after the finishing boundary. + +* "git mailinfo" also was unhappy when the "From: " line only had a bare + e-mail address. + +* "git merge" did not refresh the index correctly when a merge resulted in + a fast-forward. + +* "git merge" did not resolve a truly trivial merges that can be done + without content level merges. + +* "git svn dcommit" to a repository with URL that has embedded usernames + did not work correctly. + +Contains other various documentation fixes. diff --git a/Documentation/RelNotes/1.6.0.2.txt b/Documentation/RelNotes/1.6.0.2.txt new file mode 100644 index 0000000..7d8fb85 --- /dev/null +++ b/Documentation/RelNotes/1.6.0.2.txt @@ -0,0 +1,81 @@ +GIT v1.6.0.2 Release Notes +========================== + +Fixes since v1.6.0.1 +-------------------- + +* Installation on platforms that needs .exe suffix to git-* programs were + broken in 1.6.0.1. + +* Installation on filesystems without symbolic links support did not + work well. + +* In-tree documentations and test scripts now use "git foo" form to set a + better example, instead of the "git-foo" form (which is an acceptable + form if you have "PATH=$(git --exec-path):$PATH" in your script) + +* Many commands did not use the correct working tree location when used + with GIT_WORK_TREE environment settings. + +* Some systems need to use compatibility fnmatch and regex libraries + independent from each other; the compat/ area has been reorganized to + allow this. + + +* "git apply --unidiff-zero" incorrectly applied a -U0 patch that inserts + a new line before the second line. + +* "git blame -c" did not exactly work like "git annotate" when range + boundaries are involved. + +* "git checkout file" when file is still unmerged checked out contents from + a random high order stage, which was confusing. + +* "git clone $there $here/" with extra trailing slashes after explicit + local directory name $here did not work as expected. + +* "git diff" on tracked contents with CRLF line endings did not drive "less" + intelligently when showing added or removed lines. + +* "git diff --dirstat -M" did not add changes in subdirectories up + correctly for renamed paths. + +* "git diff --cumulative" did not imply "--dirstat". + +* "git for-each-ref refs/heads/" did not work as expected. + +* "git gui" allowed users to feed patch without any context to be applied. + +* "git gui" botched parsing "diff" output when a line that begins with two + dashes and a space gets removed or a line that begins with two pluses + and a space gets added. + +* "git gui" translation updates and i18n fixes. + +* "git index-pack" is more careful against disk corruption while completing + a thin pack. + +* "git log -i --grep=pattern" did not ignore case; neither "git log -E + --grep=pattern" triggered extended regexp. + +* "git log --pretty="%ad" --date=short" did not use short format when + showing the timestamp. + +* "git log --author=author" match incorrectly matched with the + timestamp part of "author " line in commit objects. + +* "git log -F --author=author" did not work at all. + +* Build procedure for "git shell" that used stub versions of some + functions and globals was not understood by linkers on some platforms. + +* "git stash" was fooled by a stat-dirty but otherwise unmodified paths + and refused to work until the user refreshed the index. + +* "git svn" was broken on Perl before 5.8 with recent fixes to reduce + use of temporary files. + +* "git verify-pack -v" did not work correctly when given more than one + packfile. + +Also contains many documentation updates. diff --git a/Documentation/RelNotes/1.6.0.3.txt b/Documentation/RelNotes/1.6.0.3.txt new file mode 100644 index 0000000..ae05778 --- /dev/null +++ b/Documentation/RelNotes/1.6.0.3.txt @@ -0,0 +1,117 @@ +GIT v1.6.0.3 Release Notes +========================== + +Fixes since v1.6.0.2 +-------------------- + +* "git archive --format=zip" did not honor core.autocrlf while + --format=tar did. + +* Continuing "git rebase -i" was very confused when the user left modified + files in the working tree while resolving conflicts. + +* Continuing "git rebase -i" was also very confused when the user left + some staged changes in the index after "edit". + +* "git rebase -i" now honors the pre-rebase hook, just like the + other rebase implementations "git rebase" and "git rebase -m". + +* "git rebase -i" incorrectly aborted when there is no commit to replay. + +* Behaviour of "git diff --quiet" was inconsistent with "diff --exit-code" + with the output redirected to /dev/null. + +* "git diff --no-index" on binary files no longer outputs a bogus + "diff --git" header line. + +* "git diff" hunk header patterns with multiple elements separated by LF + were not used correctly. + +* Hunk headers in "git diff" default to using extended regular + expressions, fixing some of the internal patterns on non-GNU + platforms. + +* New config "diff.*.xfuncname" exposes extended regular expressions + for user specified hunk header patterns. + +* "git gc" when ejecting otherwise unreachable objects from packfiles into + loose form leaked memory. + +* "git index-pack" was recently broken and mishandled objects added by + thin-pack completion processing under memory pressure. + +* "git index-pack" was recently broken and misbehaved when run from inside + .git/objects/pack/ directory. + +* "git stash apply sash@{1}" was fixed to error out. Prior versions + would have applied stash@{0} incorrectly. + +* "git stash apply" now offers a better suggestion on how to continue + if the working tree is currently dirty. + +* "git for-each-ref --format=%(subject)" fixed for commits with no + no newline in the message body. + +* "git remote" fixed to protect printf from user input. + +* "git remote show -v" now displays all URLs of a remote. + +* "git checkout -b branch" was confused when branch already existed. + +* "git checkout -q" once again suppresses the locally modified file list. + +* "git clone -q", "git fetch -q" asks remote side to not send + progress messages, actually making their output quiet. + +* Cross-directory renames are no longer used when creating packs. This + allows more graceful behavior on filesystems like sshfs. + +* Stale temporary files under $GIT_DIR/objects/pack are now cleaned up + automatically by "git prune". + +* "git merge" once again removes directories after the last file has + been removed from it during the merge. + +* "git merge" did not allocate enough memory for the structure itself when + enumerating the parents of the resulting commit. + +* "git blame -C -C" no longer segfaults while trying to pass blame if + it encounters a submodule reference. + +* "git rm" incorrectly claimed that you have local modifications when a + path was merely stat-dirty. + +* "git svn" fixed to display an error message when 'set-tree' failed, + instead of a Perl compile error. + +* "git submodule" fixed to handle checking out a different commit + than HEAD after initializing the submodule. + +* The "git commit" error message when there are still unmerged + files present was clarified to match "git write-tree". + +* "git init" was confused when core.bare or core.sharedRepository are set + in system or user global configuration file by mistake. When --bare or + --shared is given from the command line, these now override such + settings made outside the repositories. + +* Some segfaults due to uncaught NULL pointers were fixed in multiple + tools such as apply, reset, update-index. + +* Solaris builds now default to OLD_ICONV=1 to avoid compile warnings; + Solaris 8 does not define NEEDS_LIBICONV by default. + +* "Git.pm" tests relied on unnecessarily more recent version of Perl. + +* "gitweb" triggered undef warning on commits without log messages. + +* "gitweb" triggered undef warnings on missing trees. + +* "gitweb" now removes PATH_INFO from its URLs so users don't have + to manually set the URL in the gitweb configuration. + +* Bash completion removed support for legacy "git-fetch", "git-push" + and "git-pull" as these are no longer installed. Dashless form + ("git fetch") is still however supported. + +Many other documentation updates. diff --git a/Documentation/RelNotes/1.6.0.4.txt b/Documentation/RelNotes/1.6.0.4.txt new file mode 100644 index 0000000..d522661 --- /dev/null +++ b/Documentation/RelNotes/1.6.0.4.txt @@ -0,0 +1,39 @@ +GIT v1.6.0.4 Release Notes +========================== + +Fixes since v1.6.0.3 +-------------------- + +* 'git add -p' said "No changes" when only binary files were changed. + +* 'git archive' did not work correctly in bare repositories. + +* 'git checkout -t -b newbranch' when you are on detached HEAD was broken. + +* when we refuse to detect renames because there are too many new or + deleted files, 'git diff' did not say how many there are. + +* 'git push --mirror' tried and failed to push the stash; there is no + point in sending it to begin with. + +* 'git push' did not update the remote tracking reference if the corresponding + ref on the remote end happened to be already up to date. + +* 'git pull $there $branch:$current_branch' did not work when you were on + a branch yet to be born. + +* when giving up resolving a conflicted merge, 'git reset --hard' failed + to remove new paths from the working tree. + +* 'git send-email' had a small fd leak while scanning directory. + +* 'git status' incorrectly reported a submodule directory as an untracked + directory. + +* 'git svn' used deprecated 'git-foo' form of subcommand invocation. + +* 'git update-ref -d' to remove a reference did not honor --no-deref option. + +* Plugged small memleaks here and there. + +* Also contains many documentation updates. diff --git a/Documentation/RelNotes/1.6.0.5.txt b/Documentation/RelNotes/1.6.0.5.txt new file mode 100644 index 0000000..a08bb96 --- /dev/null +++ b/Documentation/RelNotes/1.6.0.5.txt @@ -0,0 +1,56 @@ +GIT v1.6.0.5 Release Notes +========================== + +Fixes since v1.6.0.4 +-------------------- + +* "git checkout" used to crash when your HEAD was pointing at a deleted + branch. + +* "git checkout" from an un-checked-out state did not allow switching out + of the current branch. + +* "git diff" always allowed GIT_EXTERNAL_DIFF and --no-ext-diff was no-op for + the command. + +* Giving 3 or more tree-ish to "git diff" is supposed to show the combined + diff from second and subsequent trees to the first one, but the order was + screwed up. + +* "git fast-export" did not export all tags. + +* "git ls-files --with-tree=<tree>" did not work with options other + than -c, most notably with -m. + +* "git pack-objects" did not make its best effort to honor --max-pack-size + option when a single first object already busted the given limit and + placed many objects in a single pack. + +* "git-p4" fast import frontend was too eager to trigger its keyword expansion + logic, even on a keyword-looking string that does not have closing '$' on the + same line. + +* "git push $there" when the remote $there is defined in $GIT_DIR/branches/$there + behaves more like what cg-push from Cogito used to work. + +* when giving up resolving a conflicted merge, "git reset --hard" failed + to remove new paths from the working tree. + +* "git tag" did not complain when given mutually incompatible set of options. + +* The message constructed in the internal editor was discarded when "git + tag -s" failed to sign the message, which was often caused by the user + not configuring GPG correctly. + +* "make check" cannot be run without sparse; people may have meant to say + "make test" instead, so suggest that. + +* Internal diff machinery had a corner case performance bug that choked on + a large file with many repeated contents. + +* "git repack" used to grab objects out of packs marked with .keep + into a new pack. + +* Many unsafe call to sprintf() style varargs functions are corrected. + +* Also contains quite a few documentation updates. diff --git a/Documentation/RelNotes/1.6.0.6.txt b/Documentation/RelNotes/1.6.0.6.txt new file mode 100644 index 0000000..64ece1f --- /dev/null +++ b/Documentation/RelNotes/1.6.0.6.txt @@ -0,0 +1,33 @@ +GIT v1.6.0.6 Release Notes +========================== + +Fixes since 1.6.0.5 +------------------- + + * "git fsck" had a deep recursion that wasted stack space. + + * "git fast-export" and "git fast-import" choked on an old style + annotated tag that lack the tagger information. + + * "git mergetool -- file" did not correctly skip "--" marker that + signals the end of options list. + + * "git show $tag" segfaulted when an annotated $tag pointed at a + nonexistent object. + + * "git show 2>error" when the standard output is automatically redirected + to the pager redirected the standard error to the pager as well; there + was no need to. + + * "git send-email" did not correctly handle list of addresses when + they had quoted comma (e.g. "Lastname, Givenname" <mail@addre.ss>). + + * Logic to discover branch ancestry in "git svn" was unreliable when + the process to fetch history was interrupted. + + * Removed support for an obsolete gitweb request URI, whose + implementation ran "git diff" Porcelain, instead of using plumbing, + which would have run an external diff command specified in the + repository configuration as the gitweb user. + +Also contains numerous documentation typofixes. diff --git a/Documentation/RelNotes/1.6.0.txt b/Documentation/RelNotes/1.6.0.txt new file mode 100644 index 0000000..de7ef16 --- /dev/null +++ b/Documentation/RelNotes/1.6.0.txt @@ -0,0 +1,258 @@ +GIT v1.6.0 Release Notes +======================== + +User visible changes +-------------------- + +With the default Makefile settings, most of the programs are now +installed outside your $PATH, except for "git", "gitk" and +some server side programs that need to be accessible for technical +reasons. Invoking a git subcommand as "git-xyzzy" from the command +line has been deprecated since early 2006 (and officially announced in +1.5.4 release notes); use of them from your scripts after adding +output from "git --exec-path" to the $PATH is still supported in this +release, but users are again strongly encouraged to adjust their +scripts to use "git xyzzy" form, as we will stop installing +"git-xyzzy" hardlinks for built-in commands in later releases. + +An earlier change to page "git status" output was overwhelmingly unpopular +and has been reverted. + +Source changes needed for porting to MinGW environment are now all in the +main git.git codebase. + +By default, packfiles created with this version uses delta-base-offset +encoding introduced in v1.4.4. Pack idx files are using version 2 that +allows larger packs and added robustness thanks to its CRC checking, +introduced in v1.5.2 and v1.4.4.5. If you want to keep your repositories +backwards compatible past these versions, set repack.useDeltaBaseOffset +to false or pack.indexVersion to 1, respectively. + +We used to prevent sample hook scripts shipped in templates/ from +triggering by default by relying on the fact that we install them as +unexecutable, but on some filesystems, this approach does not work. +They are now shipped with ".sample" suffix. If you want to activate +any of these samples as-is, rename them to drop the ".sample" suffix, +instead of running "chmod +x" on them. For example, you can rename +hooks/post-update.sample to hooks/post-update to enable the sample +hook that runs update-server-info, in order to make repositories +friendly to dumb protocols (i.e. HTTP). + +GIT_CONFIG, which was only documented as affecting "git config", but +actually affected all git commands, now only affects "git config". +GIT_LOCAL_CONFIG, also only documented as affecting "git config" and +not different from GIT_CONFIG in a useful way, is removed. + +The ".dotest" temporary area "git am" and "git rebase" use is now moved +inside the $GIT_DIR, to avoid mistakes of adding it to the project by +accident. + +An ancient merge strategy "stupid" has been removed. + + +Updates since v1.5.6 +-------------------- + +(subsystems) + +* git-p4 in contrib learned "allowSubmit" configuration to control on + which branch to allow "submit" subcommand. + +* git-gui learned to stage changes per-line. + +(portability) + +* Changes for MinGW port have been merged, thanks to Johannes Sixt and + gangs. + +* Sample hook scripts shipped in templates/ are now suffixed with + *.sample. + +* perl's in-place edit (-i) does not work well without backup files on Windows; + some tests are rewritten to cope with this. + +(documentation) + +* Updated howto/update-hook-example + +* Got rid of usage of "git-foo" from the tutorial and made typography + more consistent. + +* Disambiguating "--" between revs and paths is finally documented. + +(performance, robustness, sanity etc.) + +* index-pack used too much memory when dealing with a deep delta chain. + This has been optimized. + +* reduced excessive inlining to shrink size of the "git" binary. + +* verify-pack checks the object CRC when using version 2 idx files. + +* When an object is corrupt in a pack, the object became unusable even + when the same object is available in a loose form, We now try harder to + fall back to these redundant objects when able. In particular, "git + repack -a -f" can be used to fix such a corruption as long as necessary + objects are available. + +* Performance of "git-blame -C -C" operation is vastly improved. + +* git-clone does not create refs in loose form anymore (it behaves as + if you immediately ran git-pack-refs after cloning). This will help + repositories with insanely large number of refs. + +* core.fsyncobjectfiles configuration can be used to ensure that the loose + objects created will be fsync'ed (this is only useful on filesystems + that does not order data writes properly). + +* "git commit-tree" plumbing can make Octopus with more than 16 parents. + "git commit" has been capable of this for quite some time. + +(usability, bells and whistles) + +* even more documentation pages are now accessible via "man" and "git help". + +* A new environment variable GIT_CEILING_DIRECTORIES can be used to stop + the discovery process of the toplevel of working tree; this may be useful + when you are working in a slow network disk and are outside any working tree, + as bash-completion and "git help" may still need to run in these places. + +* By default, stash entries never expire. Set reflogexpire in [gc + "refs/stash"] to a reasonable value to get traditional auto-expiration + behaviour back + +* Longstanding latency issue with bash completion script has been + addressed. This will need to be backmerged to 'maint' later. + +* pager.<cmd> configuration variable can be used to enable/disable the + default paging behaviour per command. + +* "git-add -i" has a new action 'e/dit' to allow you edit the patch hunk + manually. + +* git-am records the original tip of the branch in ORIG_HEAD before it + starts applying patches. + +* git-apply can handle a patch that touches the same path more than once + much better than before. + +* git-apply can be told not to trust the line counts recorded in the input + patch but recount, with the new --recount option. + +* git-apply can be told to apply a patch to a path deeper than what the + patch records with --directory option. + +* git-archive can be told to omit certain paths from its output using + export-ignore attributes. + +* git-archive uses the zlib default compression level when creating + zip archive. + +* git-archive's command line options --exec and --remote can take their + parameters as separate command line arguments, similar to other commands. + IOW, both "--exec=path" and "--exec path" are now supported. + +* With -v option, git-branch describes the remote tracking statistics + similar to the way git-checkout reports by how many commits your branch + is ahead/behind. + +* git-branch's --contains option used to always require a commit parameter + to limit the branches with; it now defaults to list branches that + contains HEAD if this parameter is omitted. + +* git-branch's --merged and --no-merged option used to always limit the + branches relative to the HEAD, but they can now take an optional commit + argument that is used in place of HEAD. + +* git-bundle can read the revision arguments from the standard input. + +* git-cherry-pick can replay a root commit now. + +* git-clone can clone from a remote whose URL would be rewritten by + configuration stored in $HOME/.gitconfig now. + +* "git-clone --mirror" is a handy way to set up a bare mirror repository. + +* git-cvsserver learned to respond to "cvs co -c". + +* git-diff --check now checks leftover merge conflict markers. + +* "git-diff -p" learned to grab a better hunk header lines in + BibTex, Pascal/Delphi, and Ruby files and also pays attention to + chapter and part boundary in TeX documents. + +* When remote side used to have branch 'foo' and git-fetch finds that now + it has branch 'foo/bar', it refuses to lose the existing remote tracking + branch and its reflog. The error message has been improved to suggest + pruning the remote if the user wants to proceed and get the latest set + of branches from the remote, including such 'foo/bar'. + +* fast-export learned to export and import marks file; this can be used to + interface with fast-import incrementally. + +* fast-import and fast-export learned to export and import gitlinks. + +* "gitk" left background process behind after being asked to dig very deep + history and the user killed the UI; the process is killed when the UI goes + away now. + +* git-rebase records the original tip of branch in ORIG_HEAD before it is + rewound. + +* "git rerere" can be told to update the index with auto-reused resolution + with rerere.autoupdate configuration variable. + +* git-rev-parse learned $commit^! and $commit^@ notations used in "log" + family. These notations are available in gitk as well, because the gitk + command internally uses rev-parse to interpret its arguments. + +* git-rev-list learned --children option to show child commits it + encountered during the traversal, instead of showing parent commits. + +* git-send-mail can talk not just over SSL but over TLS now. + +* git-shortlog honors custom output format specified with "--pretty=format:". + +* "git-stash save" learned --keep-index option. This lets you stash away the + local changes and bring the changes staged in the index to your working + tree for examination and testing. + +* git-stash also learned branch subcommand to create a new branch out of + stashed changes. + +* git-status gives the remote tracking statistics similar to the way + git-checkout reports by how many commits your branch is ahead/behind. + +* "git-svn dcommit" is now aware of auto-props setting the subversion user + has. + +* You can tell "git status -u" to even more aggressively omit checking + untracked files with --untracked-files=no. + +* Original SHA-1 value for "update-ref -d" is optional now. + +* Error codes from gitweb are made more descriptive where possible, rather + than "403 forbidden" as we used to issue everywhere. + +(internal) + +* git-merge has been reimplemented in C. + + +Fixes since v1.5.6 +------------------ + +All of the fixes in v1.5.6 maintenance series are included in +this release, unless otherwise noted. + + * git-clone ignored its -u option; the fix needs to be backported to + 'maint'; + + * git-mv used to lose the distinction between changes that are staged + and that are only in the working tree, by staging both in the index + after moving such a path. + + * "git-rebase -i -p" rewrote the parents to wrong ones when amending + (either edit or squash) was involved, and did not work correctly + when fast forwarding. + diff --git a/Documentation/RelNotes/1.6.1.1.txt b/Documentation/RelNotes/1.6.1.1.txt new file mode 100644 index 0000000..8c594ba --- /dev/null +++ b/Documentation/RelNotes/1.6.1.1.txt @@ -0,0 +1,59 @@ +GIT v1.6.1.1 Release Notes +========================== + +Fixes since v1.6.1 +------------------ + +* "git add frotz/nitfol" when "frotz" is a submodule should have errored + out, but it didn't. + +* "git apply" took file modes from the patch text and updated the mode + bits of the target tree even when the patch was not about mode changes. + +* "git bisect view" on Cygwin did not launch gitk + +* "git checkout $tree" did not trigger an error. + +* "git commit" tried to remove COMMIT_EDITMSG from the work tree by mistake. + +* "git describe --all" complained when a commit is described with a tag, + which was nonsense. + +* "git diff --no-index --" did not trigger no-index (aka "use git-diff as + a replacement of diff on untracked files") behaviour. + +* "git format-patch -1 HEAD" on a root commit failed to produce patch + text. + +* "git fsck branch" did not work as advertised; instead it behaved the same + way as "git fsck". + +* "git log --pretty=format:%s" did not handle a multi-line subject the + same way as built-in log listers (i.e. shortlog, --pretty=oneline, etc.) + +* "git daemon", and "git merge-file" are more careful when freopen fails + and barf, instead of going on and writing to unopened filehandle. + +* "git http-push" did not like some RFC 4918 compliant DAV server + responses. + +* "git merge -s recursive" mistakenly overwritten an untracked file in the + work tree upon delete/modify conflict. + +* "git merge -s recursive" didn't leave the index unmerged for entries with + rename/delete conflicts. + +* "git merge -s recursive" clobbered untracked files in the work tree. + +* "git mv -k" with more than one erroneous paths misbehaved. + +* "git read-tree -m -u" hence branch switching incorrectly lost a + subdirectory in rare cases. + +* "git rebase -i" issued an unnecessary error message upon a user error of + marking the first commit to be "squash"ed. + +* "git shortlog" did not format a commit message with multi-line + subject correctly. + +Many documentation updates. diff --git a/Documentation/RelNotes/1.6.1.2.txt b/Documentation/RelNotes/1.6.1.2.txt new file mode 100644 index 0000000..be37cbb --- /dev/null +++ b/Documentation/RelNotes/1.6.1.2.txt @@ -0,0 +1,39 @@ +GIT v1.6.1.2 Release Notes +========================== + +Fixes since v1.6.1.1 +-------------------- + +* The logic for rename detection in internal diff used by commands like + "git diff" and "git blame" has been optimized to avoid loading the same + blob repeatedly. + +* We did not allow writing out a blob that is larger than 2GB for no good + reason. + +* "git format-patch -o $dir", when $dir is a relative directory, used it + as relative to the root of the work tree, not relative to the current + directory. + +* v1.6.1 introduced an optimization for "git push" into a repository (A) + that borrows its objects from another repository (B) to avoid sending + objects that are available in repository B, when they are not yet used + by repository A. However the code on the "git push" sender side was + buggy and did not work when repository B had new objects that are not + known by the sender. This caused pushing into a "forked" repository + served by v1.6.1 software using "git push" from v1.6.1 sometimes did not + work. The bug was purely on the "git push" sender side, and has been + corrected. + +* "git status -v" did not paint its diff output in colour even when + color.ui configuration was set. + +* "git ls-tree" learned --full-tree option to help Porcelain scripts that + want to always see the full path regardless of the current working + directory. + +* "git grep" incorrectly searched in work tree paths even when they are + marked as assume-unchanged. It now searches in the index entries. + +* "git gc" with no grace period needlessly ejected packed but unreachable + objects in their loose form, only to delete them right away. diff --git a/Documentation/RelNotes/1.6.1.3.txt b/Documentation/RelNotes/1.6.1.3.txt new file mode 100644 index 0000000..cd08d81 --- /dev/null +++ b/Documentation/RelNotes/1.6.1.3.txt @@ -0,0 +1,28 @@ +GIT v1.6.1.3 Release Notes +========================== + +Fixes since v1.6.1.2 +-------------------- + +* "git diff --binary | git apply" pipeline did not work well when + a binary blob is changed to a symbolic link. + +* Some combinations of -b/-w/--ignore-space-at-eol to "git diff" did + not work as expected. + +* "git grep" did not pass the -I (ignore binary) option when + calling out an external grep program. + +* "git log" and friends include HEAD to the set of starting points + when --all is given. This makes a difference when you are not + on any branch. + +* "git mv" to move an untracked file to overwrite a tracked + contents misbehaved. + +* "git merge -s octopus" with many potential merge bases did not + work correctly. + +* RPM binary package installed the html manpages in a wrong place. + +Also includes minor documentation fixes and updates. diff --git a/Documentation/RelNotes/1.6.1.4.txt b/Documentation/RelNotes/1.6.1.4.txt new file mode 100644 index 0000000..ccbad79 --- /dev/null +++ b/Documentation/RelNotes/1.6.1.4.txt @@ -0,0 +1,41 @@ +GIT v1.6.1.4 Release Notes +========================== + +Fixes since v1.6.1.3 +-------------------- + +* .gitignore learned to handle backslash as a quoting mechanism for + comment introduction character "#". + This fix was first merged to 1.6.2.1. + +* "git fast-export" produced wrong output with some parents missing from + commits, when the history is clock-skewed. + +* "git fast-import" sometimes failed to read back objects it just wrote + out and aborted, because it failed to flush stale cached data. + +* "git-ls-tree" and "git-diff-tree" used a pathspec correctly when + deciding to descend into a subdirectory but they did not match the + individual paths correctly. This caused pathspecs "abc/d ab" to match + "abc/0" ("abc/d" made them decide to descend into the directory "abc/", + and then "ab" incorrectly matched "abc/0" when it shouldn't). + This fix was first merged to 1.6.2.3. + +* import-zips script (in contrib) did not compute the common directory + prefix correctly. + This fix was first merged to 1.6.2.2. + +* "git init" segfaulted when given an overlong template location via + the --template= option. + This fix was first merged to 1.6.2.4. + +* "git repack" did not error out when necessary object was missing in the + repository. + +* git-repack (invoked from git-gc) did not work as nicely as it should in + a repository that borrows objects from neighbours via alternates + mechanism especially when some packs are marked with the ".keep" flag + to prevent them from being repacked. + This fix was first merged to 1.6.2.3. + +Also includes minor documentation fixes and updates. diff --git a/Documentation/RelNotes/1.6.1.txt b/Documentation/RelNotes/1.6.1.txt new file mode 100644 index 0000000..7b152a6 --- /dev/null +++ b/Documentation/RelNotes/1.6.1.txt @@ -0,0 +1,280 @@ +GIT v1.6.1 Release Notes +======================== + +Updates since v1.6.0 +-------------------- + +When some commands (e.g. "git log", "git diff") spawn pager internally, we +used to make the pager the parent process of the git command that produces +output. This meant that the exit status of the whole thing comes from the +pager, not the underlying git command. We swapped the order of the +processes around and you will see the exit code from the command from now +on. + +(subsystems) + +* gitk can call out to git-gui to view "git blame" output; git-gui in turn + can run gitk from its blame view. + +* Various git-gui updates including updated translations. + +* Various gitweb updates from repo.or.cz installation. + +* Updates to emacs bindings. + +(portability) + +* A few test scripts used nonportable "grep" that did not work well on + some platforms, e.g. Solaris. + +* Sample pre-auto-gc script has OS X support. + +* Makefile has support for (ancient) FreeBSD 4.9. + +(performance) + +* Many operations that are lstat(3) heavy can be told to pre-execute + necessary lstat(3) in parallel before their main operations, which + potentially gives much improved performance for cold-cache cases or in + environments with weak metadata caching (e.g. NFS). + +* The underlying diff machinery to produce textual output has been + optimized, which would result in faster "git blame" processing. + +* Most of the test scripts (but not the ones that try to run servers) + can be run in parallel. + +* Bash completion of refnames in a repository with massive number of + refs has been optimized. + +* Cygwin port uses native stat/lstat implementations when applicable, + which leads to improved performance. + +* "git push" pays attention to alternate repositories to avoid sending + unnecessary objects. + +* "git svn" can rebuild an out-of-date rev_map file. + +(usability, bells and whistles) + +* When you mistype a command name, git helpfully suggests what it guesses + you might have meant to say. help.autocorrect configuration can be set + to a non-zero value to accept the suggestion when git can uniquely + guess. + +* The packfile machinery hopefully is more robust when dealing with + corrupt packs if redundant objects involved in the corruption are + available elsewhere. + +* "git add -N path..." adds the named paths as an empty blob, so that + subsequent "git diff" will show a diff as if they are creation events. + +* "git add" gained a built-in synonym for people who want to say "stage + changes" instead of "add contents to the staging area" which amounts + to the same thing. + +* "git apply" learned --include=paths option, similar to the existing + --exclude=paths option. + +* "git bisect" is careful about a user mistake and suggests testing of + merge base first when good is not a strict ancestor of bad. + +* "git bisect skip" can take a range of commits. + +* "git blame" re-encodes the commit metainfo to UTF-8 from i18n.commitEncoding + by default. + +* "git check-attr --stdin" can check attributes for multiple paths. + +* "git checkout --track origin/hack" used to be a syntax error. It now + DWIMs to create a corresponding local branch "hack", i.e. acts as if you + said "git checkout --track -b hack origin/hack". + +* "git checkout --ours/--theirs" can be used to check out one side of a + conflicting merge during conflict resolution. + +* "git checkout -m" can be used to recreate the initial conflicted state + during conflict resolution. + +* "git cherry-pick" can also utilize rerere for conflict resolution. + +* "git clone" learned to be verbose with -v + +* "git commit --author=$name" can look up author name from existing + commits. + +* output from "git commit" has been reworded in a more concise and yet + more informative way. + +* "git count-objects" reports the on-disk footprint for packfiles and + their corresponding idx files. + +* "git daemon" learned --max-connections=<count> option. + +* "git daemon" exports REMOTE_ADDR to record client address, so that + spawned programs can act differently on it. + +* "git describe --tags" favours closer lightweight tags than farther + annotated tags now. + +* "git diff" learned to mimic --suppress-blank-empty from GNU diff via a + configuration option. + +* "git diff" learned to put more sensible hunk headers for Python, + HTML and ObjC contents. + +* "git diff" learned to vary the a/ vs b/ prefix depending on what are + being compared, controlled by diff.mnemonicprefix configuration. + +* "git diff" learned --dirstat-by-file to count changed files, not number + of lines, when summarizing the global picture. + +* "git diff" learned "textconv" filters --- a binary or hard-to-read + contents can be munged into human readable form and the difference + between the results of the conversion can be viewed (obviously this + cannot produce a patch that can be applied, so this is disabled in + format-patch among other things). + +* "--cached" option to "git diff has an easier to remember synonym "--staged", + to ask "what is the difference between the given commit and the + contents staged in the index?" + +* "git for-each-ref" learned "refname:short" token that gives an + unambiguously abbreviated refname. + +* Auto-numbering of the subject lines is the default for "git + format-patch" now. + +* "git grep" learned to accept -z similar to GNU grep. + +* "git help" learned to use GIT_MAN_VIEWER environment variable before + using "man" program. + +* "git imap-send" can optionally talk SSL. + +* "git index-pack" is more careful against disk corruption while + completing a thin pack. + +* "git log --check" and "git log --exit-code" passes their underlying diff + status with their exit status code. + +* "git log" learned --simplify-merges, a milder variant of --full-history; + "gitk --simplify-merges" is easier to view than with --full-history. + +* "git log" learned "--source" to show what ref each commit was reached + from. + +* "git log" also learned "--simplify-by-decoration" to show the + birds-eye-view of the topology of the history. + +* "git log --pretty=format:" learned "%d" format element that inserts + names of tags that point at the commit. + +* "git merge --squash" and "git merge --no-ff" into an unborn branch are + noticed as user errors. + +* "git merge -s $strategy" can use a custom built strategy if you have a + command "git-merge-$strategy" on your $PATH. + +* "git pull" (and "git fetch") can be told to operate "-v"erbosely or + "-q"uietly. + +* "git push" can be told to reject deletion of refs with receive.denyDeletes + configuration. + +* "git rebase" honours pre-rebase hook; use --no-verify to bypass it. + +* "git rebase -p" uses interactive rebase machinery now to preserve the merges. + +* "git reflog expire branch" can be used in place of "git reflog expire + refs/heads/branch". + +* "git remote show $remote" lists remote branches one-per-line now. + +* "git send-email" can be given revision range instead of files and + maildirs on the command line, and automatically runs format-patch to + generate patches for the given revision range. + +* "git submodule foreach" subcommand allows you to iterate over checked + out submodules. + +* "git submodule sync" subcommands allows you to update the origin URL + recorded in submodule directories from the toplevel .gitmodules file. + +* "git svn branch" can create new branches on the other end. + +* "gitweb" can use more saner PATH_INFO based URL. + +(internal) + +* "git hash-object" learned to lie about the path being hashed, so that + correct gitattributes processing can be done while hashing contents + stored in a temporary file. + +* various callers of git-merge-recursive avoid forking it as an external + process. + +* Git class defined in "Git.pm" can be subclasses a bit more easily. + +* We used to link GNU regex library as a compatibility layer for some + platforms, but it turns out it is not necessary on most of them. + +* Some path handling routines used fixed number of buffers used alternately + but depending on the call depth, this arrangement led to hard to track + bugs. This issue is being addressed. + + +Fixes since v1.6.0 +------------------ + +All of the fixes in v1.6.0.X maintenance series are included in this +release, unless otherwise noted. + +* Porcelains implemented as shell scripts were utterly confused when you + entered to a subdirectory of a work tree from sideways, following a + symbolic link (this may need to be backported to older releases later). + +* Tracking symbolic links would work better on filesystems whose lstat() + returns incorrect st_size value for them. + +* "git add" and "git update-index" incorrectly allowed adding S/F when S + is a tracked symlink that points at a directory D that has a path F in + it (we still need to fix a similar nonsense when S is a submodule and F + is a path in it). + +* "git am" after stopping at a broken patch lost --whitespace, -C, -p and + --3way options given from the command line initially. + +* "git diff --stdin" used to take two trees on a line and compared them, + but we dropped support for such a use case long time ago. This has + been resurrected. + +* "git filter-branch" failed to rewrite a tag name with slashes in it. + +* "git http-push" did not understand URI scheme other than opaquelocktoken + when acquiring a lock from the server (this may need to be backported to + older releases later). + +* After "git rebase -p" stopped with conflicts while replaying a merge, + "git rebase --continue" did not work (may need to be backported to older + releases). + +* "git revert" records relative to which parent a revert was made when + reverting a merge. Together with new documentation that explains issues + around reverting a merge and merging from the updated branch later, this + hopefully will reduce user confusion (this may need to be backported to + older releases later). + +* "git rm --cached" used to allow an empty blob that was added earlier to + be removed without --force, even when the file in the work tree has + since been modified. + +* "git push --tags --all $there" failed with generic usage message without + telling saying these two options are incompatible. + +* "git log --author/--committer" match used to potentially match the + timestamp part, exposing internal implementation detail. Also these did + not work with --fixed-strings match at all. + +* "gitweb" did not mark non-ASCII characters imported from external HTML fragments + correctly. diff --git a/Documentation/RelNotes/1.6.2.1.txt b/Documentation/RelNotes/1.6.2.1.txt new file mode 100644 index 0000000..dfa3641 --- /dev/null +++ b/Documentation/RelNotes/1.6.2.1.txt @@ -0,0 +1,19 @@ +GIT v1.6.2.1 Release Notes +========================== + +Fixes since v1.6.2 +------------------ + +* .gitignore learned to handle backslash as a quoting mechanism for + comment introduction character "#". + +* timestamp output in --date=relative mode used to display timestamps that + are long time ago in the default mode; it now uses "N years M months + ago", and "N years ago". + +* git-add -i/-p now works with non-ASCII pathnames. + +* "git hash-object -w" did not read from the configuration file from the + correct .git directory. + +* git-send-email learned to correctly handle multiple Cc: addresses. diff --git a/Documentation/RelNotes/1.6.2.2.txt b/Documentation/RelNotes/1.6.2.2.txt new file mode 100644 index 0000000..fafa998 --- /dev/null +++ b/Documentation/RelNotes/1.6.2.2.txt @@ -0,0 +1,45 @@ +GIT v1.6.2.2 Release Notes +========================== + +Fixes since v1.6.2.1 +-------------------- + +* A longstanding confusing description of what --pickaxe option of + git-diff does has been clarified in the documentation. + +* "git-blame -S" did not quite work near the commits that were given + on the command line correctly. + +* "git diff --pickaxe-regexp" did not count overlapping matches + correctly. + +* "git diff" did not feed files in work-tree representation to external + diff and textconv. + +* "git-fetch" in a repository that was not cloned from anywhere said + it cannot find 'origin', which was hard to understand for new people. + +* "git-format-patch --numbered-files --stdout" did not have to die of + incompatible options; it now simply ignores --numbered-files as no files + are produced anyway. + +* "git-ls-files --deleted" did not work well with GIT_DIR&GIT_WORK_TREE. + +* "git-read-tree A B C..." without -m option has been broken for a long + time. + +* git-send-email ignored --in-reply-to when --no-thread was given. + +* 'git-submodule add' did not tolerate extra slashes and ./ in the path it + accepted from the command line; it now is more lenient. + +* git-svn misbehaved when the project contained a path that began with + two dashes. + +* import-zips script (in contrib) did not compute the common directory + prefix correctly. + +* miscompilation of negated enum constants by old gcc (2.9) affected the + codepaths to spawn subprocesses. + +Many small documentation updates are included as well. diff --git a/Documentation/RelNotes/1.6.2.3.txt b/Documentation/RelNotes/1.6.2.3.txt new file mode 100644 index 0000000..4d3c1ac --- /dev/null +++ b/Documentation/RelNotes/1.6.2.3.txt @@ -0,0 +1,22 @@ +GIT v1.6.2.3 Release Notes +========================== + +Fixes since v1.6.2.2 +-------------------- + +* Setting an octal mode value to core.sharedrepository configuration to + restrict access to the repository to group members did not work as + advertised. + +* A fairly large and trivial memory leak while rev-list shows list of + reachable objects has been identified and plugged. + +* "git-commit --interactive" did not abort when underlying "git-add -i" + signaled a failure. + +* git-repack (invoked from git-gc) did not work as nicely as it should in + a repository that borrows objects from neighbours via alternates + mechanism especially when some packs are marked with the ".keep" flag + to prevent them from being repacked. + +Many small documentation updates are included as well. diff --git a/Documentation/RelNotes/1.6.2.4.txt b/Documentation/RelNotes/1.6.2.4.txt new file mode 100644 index 0000000..f4bf1d0 --- /dev/null +++ b/Documentation/RelNotes/1.6.2.4.txt @@ -0,0 +1,39 @@ +GIT v1.6.2.4 Release Notes +========================== + +Fixes since v1.6.2.3 +-------------------- + +* The configuration parser had a buffer overflow while parsing an overlong + value. + +* pruning reflog entries that are unreachable from the tip of the ref + during "git reflog prune" (hence "git gc") was very inefficient. + +* "git-add -p" lacked a way to say "q"uit to refuse staging any hunks for + the remaining paths. You had to say "d" and then ^C. + +* "git-checkout <tree-ish> <submodule>" did not update the index entry at + the named path; it now does. + +* "git-fast-export" choked when seeing a tag that does not point at commit. + +* "git init" segfaulted when given an overlong template location via + the --template= option. + +* "git-ls-tree" and "git-diff-tree" used a pathspec correctly when + deciding to descend into a subdirectory but they did not match the + individual paths correctly. This caused pathspecs "abc/d ab" to match + "abc/0" ("abc/d" made them decide to descend into the directory "abc/", + and then "ab" incorrectly matched "abc/0" when it shouldn't). + +* "git-merge-recursive" was broken when a submodule entry was involved in + a criss-cross merge situation. + +Many small documentation updates are included as well. + +--- +exec >/var/tmp/1 +echo O=$(git describe maint) +O=v1.6.2.3-38-g318b847 +git shortlog --no-merges $O..maint diff --git a/Documentation/RelNotes/1.6.2.5.txt b/Documentation/RelNotes/1.6.2.5.txt new file mode 100644 index 0000000..b23f9e9 --- /dev/null +++ b/Documentation/RelNotes/1.6.2.5.txt @@ -0,0 +1,21 @@ +GIT v1.6.2.5 Release Notes +========================== + +Fixes since v1.6.2.4 +-------------------- + +* "git apply" mishandled if you fed a git generated patch that renames + file A to B and file B to A at the same time. + +* "git diff -c -p" (and "diff --cc") did not expect to see submodule + differences and instead refused to work. + +* "git grep -e '('" segfaulted, instead of diagnosing a mismatched + parentheses error. + +* "git fetch" generated packs with offset-delta encoding when both ends of + the connection are capable of producing one; this cannot be read by + ancient git and the user should be able to disable this by setting + repack.usedeltabaseoffset configuration to false. + + diff --git a/Documentation/RelNotes/1.6.2.txt b/Documentation/RelNotes/1.6.2.txt new file mode 100644 index 0000000..ad060f4 --- /dev/null +++ b/Documentation/RelNotes/1.6.2.txt @@ -0,0 +1,164 @@ +GIT v1.6.2 Release Notes +======================== + +With the next major release, "git push" into a branch that is +currently checked out will be refused by default. You can choose +what should happen upon such a push by setting the configuration +variable receive.denyCurrentBranch in the receiving repository. + +To ease the transition plan, the receiving repository of such a +push running this release will issue a big warning when the +configuration variable is missing. Please refer to: + + http://git.or.cz/gitwiki/GitFaq#non-bare + http://thread.gmane.org/gmane.comp.version-control.git/107758/focus=108007 + +for more details on the reason why this change is needed and the +transition plan. + +For a similar reason, "git push $there :$killed" to delete the branch +$killed in a remote repository $there, if $killed branch is the current +branch pointed at by its HEAD, gets a large warning. You can choose what +should happen upon such a push by setting the configuration variable +receive.denyDeleteCurrent in the receiving repository. + + +Updates since v1.6.1 +-------------------- + +(subsystems) + +* git-svn updates. + +* gitweb updates, including a new patch view and RSS/Atom feed + improvements. + +* (contrib/emacs) git.el now has commands for checking out a branch, + creating a branch, cherry-picking and reverting commits; vc-git.el + is not shipped with git anymore (it is part of official Emacs). + +(performance) + +* pack-objects autodetects the number of CPUs available and uses threaded + version. + +(usability, bells and whistles) + +* automatic typo correction works on aliases as well + +* @{-1} is a way to refer to the last branch you were on. This is + accepted not only where an object name is expected, but anywhere + a branch name is expected and acts as if you typed the branch name. + E.g. "git branch --track mybranch @{-1}", "git merge @{-1}", and + "git rev-parse --symbolic-full-name @{-1}" would work as expected. + +* When refs/remotes/origin/HEAD points at a remote tracking branch that + has been pruned away, many git operations issued warning when they + internally enumerated the refs. We now warn only when you say "origin" + to refer to that pruned branch. + +* The location of .mailmap file can be configured, and its file format was + enhanced to allow mapping an incorrect e-mail field as well. + +* "git add -p" learned 'g'oto action to jump directly to a hunk. + +* "git add -p" learned to find a hunk with given text with '/'. + +* "git add -p" optionally can be told to work with just the command letter + without Enter. + +* when "git am" stops upon a patch that does not apply, it shows the + title of the offending patch. + +* "git am --directory=<dir>" and "git am --reject" passes these options + to underlying "git apply". + +* "git am" learned --ignore-date option. + +* "git blame" aligns author names better when they are spelled in + non US-ASCII encoding. + +* "git clone" now makes its best effort when cloning from an empty + repository to set up configuration variables to refer to the remote + repository. + +* "git checkout -" is a shorthand for "git checkout @{-1}". + +* "git cherry" defaults to whatever the current branch is tracking (if + exists) when the <upstream> argument is not given. + +* "git cvsserver" can be told not to add extra "via git-CVS emulator" to + the commit log message it serves via gitcvs.commitmsgannotation + configuration. + +* "git cvsserver" learned to handle 'noop' command some CVS clients seem + to expect to work. + +* "git diff" learned a new option --inter-hunk-context to coalesce close + hunks together and show context between them. + +* The definition of what constitutes a word for "git diff --color-words" + can be customized via gitattributes, command line or a configuration. + +* "git diff" learned --patience to run "patience diff" algorithm. + +* "git filter-branch" learned --prune-empty option that discards commits + that do not change the contents. + +* "git fsck" now checks loose objects in alternate object stores, instead + of misreporting them as missing. + +* "git gc --prune" was resurrected to allow "git gc --no-prune" and + giving non-default expiration period e.g. "git gc --prune=now". + +* "git grep -w" and "git grep" for fixed strings have been optimized. + +* "git mergetool" learned -y(--no-prompt) option to disable prompting. + +* "git rebase -i" can transplant a history down to root to elsewhere + with --root option. + +* "git reset --merge" is a new mode that works similar to the way + "git checkout" switches branches, taking the local changes while + switching to another commit. + +* "git submodule update" learned --no-fetch option. + +* "git tag" learned --contains that works the same way as the same option + from "git branch". + + +Fixes since v1.6.1 +------------------ + +All of the fixes in v1.6.1.X maintenance series are included in this +release, unless otherwise noted. + +Here are fixes that this release has, but have not been backported to +v1.6.1.X series. + +* "git-add sub/file" when sub is a submodule incorrectly added the path to + the superproject. + +* "git bundle" did not exclude annotated tags even when a range given + from the command line wanted to. + +* "git filter-branch" unnecessarily refused to work when you had + checked out a different commit from what is recorded in the superproject + index in a submodule. + +* "git filter-branch" incorrectly tried to update a nonexistent work tree + at the end when it is run in a bare repository. + +* "git gc" did not work if your repository was created with an ancient git + and never had any pack files in it before. + +* "git mergetool" used to ignore autocrlf and other attributes + based content rewriting. + +* branch switching and merges had a silly bug that did not validate + the correct directory when making sure an existing subdirectory is + clean. + +* "git -p cmd" when cmd is not a built-in one left the display in funny state + when killed in the middle. diff --git a/Documentation/RelNotes/1.6.3.1.txt b/Documentation/RelNotes/1.6.3.1.txt new file mode 100644 index 0000000..2400b72 --- /dev/null +++ b/Documentation/RelNotes/1.6.3.1.txt @@ -0,0 +1,10 @@ +GIT v1.6.3.1 Release Notes +========================== + +Fixes since v1.6.3 +------------------ + +* "git checkout -b new-branch" with a staged change in the index + incorrectly primed the in-index cache-tree, resulting a wrong tree + object to be written out of the index. This is a grave regression + since the last 1.6.2.X maintenance release. diff --git a/Documentation/RelNotes/1.6.3.2.txt b/Documentation/RelNotes/1.6.3.2.txt new file mode 100644 index 0000000..b2f3f02 --- /dev/null +++ b/Documentation/RelNotes/1.6.3.2.txt @@ -0,0 +1,61 @@ +GIT v1.6.3.2 Release Notes +========================== + +Fixes since v1.6.3.1 +-------------------- + + * A few codepaths picked up the first few bytes from an sha1[] by + casting the (char *) pointer to (int *); GCC 4.4 did not like this, + and aborted compilation. + + * Some unlink(2) failures went undiagnosed. + + * The "recursive" merge strategy misbehaved when faced rename/delete + conflicts while coming up with an intermediate merge base. + + * The low-level merge algorithm did not handle a degenerate case of + merging a file with itself using itself as the common ancestor + gracefully. It should produce the file itself, but instead + produced an empty result. + + * GIT_TRACE mechanism segfaulted when tracing a shell-quoted aliases. + + * OpenBSD also uses st_ctimspec in "struct stat", instead of "st_ctim". + + * With NO_CROSS_DIRECTORY_HARDLINKS, "make install" can be told not to + create hardlinks between $(gitexecdir)/git-$builtin_commands and + $(bindir)/git. + + * command completion code in bash did not reliably detect that we are + in a bare repository. + + * "git add ." in an empty directory complained that pathspec "." did not + match anything, which may be technically correct, but not useful. We + silently make it a no-op now. + + * "git add -p" (and "patch" action in "git add -i") was broken when + the first hunk that adds a line at the top was split into two and + both halves are marked to be used. + + * "git blame path" misbehaved at the commit where path became file + from a directory with some files in it. + + * "git for-each-ref" had a segfaulting bug when dealing with a tag object + created by an ancient git. + + * "git format-patch -k" still added patch numbers if format.numbered + configuration was set. + + * "git grep --color ''" did not terminate. The command also had + subtle bugs with its -w option. + + * http-push had a small use-after-free bug. + + * "git push" was converting OFS_DELTA pack representation into less + efficient REF_DELTA representation unconditionally upon transfer, + making the transferred data unnecessarily larger. + + * "git remote show origin" segfaulted when origin was still empty. + +Many other general usability updates around help text, diagnostic messages +and documentation are included as well. diff --git a/Documentation/RelNotes/1.6.3.3.txt b/Documentation/RelNotes/1.6.3.3.txt new file mode 100644 index 0000000..1c28398 --- /dev/null +++ b/Documentation/RelNotes/1.6.3.3.txt @@ -0,0 +1,38 @@ +GIT v1.6.3.3 Release Notes +========================== + +Fixes since v1.6.3.2 +-------------------- + + * "git archive" running on Cygwin can get stuck in an infinite loop. + + * "git daemon" did not correctly parse the initial line that carries + virtual host request information. + + * "git diff --textconv" leaked memory badly when the textconv filter + errored out. + + * The built-in regular expressions to pick function names to put on + hunk header lines for java and objc were very inefficiently written. + + * in certain error situations git-fetch (and git-clone) on Windows didn't + detect connection abort and ended up waiting indefinitely. + + * import-tars script (in contrib) did not import symbolic links correctly. + + * http.c used CURLOPT_SSLKEY even on libcURL version 7.9.2, even though + it was only available starting 7.9.3. + + * low-level filelevel merge driver used return value from strdup() + without checking if we ran out of memory. + + * "git rebase -i" left stray closing parenthesis in its reflog message. + + * "git remote show" did not show all the URLs associated with the named + remote, even though "git remote -v" did. Made them consistent by + making the former show all URLs. + + * "whitespace" attribute that is set was meant to detect all errors known + to git, but it told git to ignore trailing carriage-returns. + +Includes other documentation fixes. diff --git a/Documentation/RelNotes/1.6.3.4.txt b/Documentation/RelNotes/1.6.3.4.txt new file mode 100644 index 0000000..cad461b --- /dev/null +++ b/Documentation/RelNotes/1.6.3.4.txt @@ -0,0 +1,36 @@ +GIT v1.6.3.4 Release Notes +========================== + +Fixes since v1.6.3.3 +-------------------- + + * "git add --no-ignore-errors" did not override configured + add.ignore-errors configuration. + + * "git apply --whitespace=fix" did not fix trailing whitespace on an + incomplete line. + + * "git branch" opened too many commit objects unnecessarily. + + * "git checkout -f $commit" with a path that is a file (or a symlink) in + the work tree to a commit that has a directory at the path issued an + unnecessary error message. + + * "git diff -c/--cc" was very inefficient in coalescing the removed lines + shared between parents. + + * "git diff -c/--cc" showed removed lines at the beginning of a file + incorrectly. + + * "git remote show nickname" did not honor configured + remote.nickname.uploadpack when inspecting the branches at the remote. + + * "git request-pull" when talking to the terminal for a preview + showed some of the output in the pager. + + * "git request-pull start nickname [end]" did not honor configured + remote.nickname.uploadpack when it ran git-ls-remote against the remote + repository to learn the current tip of branches. + +Includes other documentation updates and minor fixes. + diff --git a/Documentation/RelNotes/1.6.3.txt b/Documentation/RelNotes/1.6.3.txt new file mode 100644 index 0000000..418c685 --- /dev/null +++ b/Documentation/RelNotes/1.6.3.txt @@ -0,0 +1,182 @@ +GIT v1.6.3 Release Notes +======================== + +With the next major release, "git push" into a branch that is +currently checked out will be refused by default. You can choose +what should happen upon such a push by setting the configuration +variable receive.denyCurrentBranch in the receiving repository. + +To ease the transition plan, the receiving repository of such a +push running this release will issue a big warning when the +configuration variable is missing. Please refer to: + + http://git.or.cz/gitwiki/GitFaq#non-bare + http://thread.gmane.org/gmane.comp.version-control.git/107758/focus=108007 + +for more details on the reason why this change is needed and the +transition plan. + +For a similar reason, "git push $there :$killed" to delete the branch +$killed in a remote repository $there, if $killed branch is the current +branch pointed at by its HEAD, gets a large warning. You can choose what +should happen upon such a push by setting the configuration variable +receive.denyDeleteCurrent in the receiving repository. + +When the user does not tell "git push" what to push, it has always +pushed matching refs. For some people it is unexpected, and a new +configuration variable push.default has been introduced to allow +changing a different default behaviour. To advertise the new feature, +a big warning is issued if this is not configured and a git push without +arguments is attempted. + + +Updates since v1.6.2 +-------------------- + +(subsystems) + +* various git-svn updates. + +* git-gui updates, including an update to Russian translation, and a + fix to an infinite loop when showing an empty diff. + +* gitk updates, including an update to Russian translation and improved Windows + support. + +(performance) + +* many uses of lstat(2) in the codepath for "git checkout" have been + optimized out. + +(usability, bells and whistles) + +* Boolean configuration variable yes/no can be written as on/off. + +* rsync:/path/to/repo can be used to run git over rsync for local + repositories. It may not be useful in practice; meant primarily for + testing. + +* http transport learned to prompt and use password when fetching from or + pushing to http://user@host.xz/ URL. + +* (msysgit) progress output that is sent over the sideband protocol can + be handled appropriately in Windows console. + +* "--pretty=<style>" option to the log family of commands can now be + spelled as "--format=<style>". In addition, --format=%formatstring + is a short-hand for --pretty=tformat:%formatstring. + +* "--oneline" is a synonym for "--pretty=oneline --abbrev-commit". + +* "--graph" to the "git log" family can draw the commit ancestry graph + in colors. + +* If you realize that you botched the patch when you are editing hunks + with the 'edit' action in git-add -i/-p, you can abort the editor to + tell git not to apply it. + +* @{-1} is a new way to refer to the last branch you were on introduced in + 1.6.2, but the initial implementation did not teach this to a few + commands. Now the syntax works with "branch -m @{-1} newname". + +* git-archive learned --output=<file> option. + +* git-archive takes attributes from the tree being archived; strictly + speaking, this is an incompatible behaviour change, but is a good one. + Use --worktree-attributes option to allow it to read attributes from + the work tree as before (deprecated git-tar tree command always reads + attributes from the work tree). + +* git-bisect shows not just the number of remaining commits whose goodness + is unknown, but also shows the estimated number of remaining rounds. + +* You can give --date=<format> option to git-blame. + +* "git-branch -r" shows HEAD symref that points at a remote branch in + interest of each tracked remote repository. + +* "git-branch -v -v" is a new way to get list of names for branches and the + "upstream" branch for them. + +* git-config learned -e option to open an editor to edit the config file + directly. + +* git-clone runs post-checkout hook when run without --no-checkout. + +* git-difftool is now part of the officially supported command, primarily + maintained by David Aguilar. + +* git-for-each-ref learned a new "upstream" token. + +* git-format-patch can be told to use attachment with a new configuration, + format.attach. + +* git-format-patch can be told to produce deep or shallow message threads. + +* git-format-patch can be told to always add sign-off with a configuration + variable. + +* git-format-patch learned format.headers configuration to add extra + header fields to the output. This behaviour is similar to the existing + --add-header=<header> option of the command. + +* git-format-patch gives human readable names to the attached files, when + told to send patches as attachments. + +* git-grep learned to highlight the found substrings in color. + +* git-imap-send learned to work around Thunderbird's inability to easily + disable format=flowed with a new configuration, imap.preformattedHTML. + +* git-rebase can be told to rebase the series even if your branch is a + descendant of the commit you are rebasing onto with --force-rebase + option. + +* git-rebase can be told to report diffstat with the --stat option. + +* Output from git-remote command has been vastly improved. + +* "git remote update --prune $remote" updates from the named remote and + then prunes stale tracking branches. + +* git-send-email learned --confirm option to review the Cc: list before + sending the messages out. + +(developers) + +* Test scripts can be run under valgrind. + +* Test scripts can be run with installed git. + +* Makefile learned 'coverage' option to run the test suites with + coverage tracking enabled. + +* Building the manpages with docbook-xsl between 1.69.1 and 1.71.1 now + requires setting DOCBOOK_SUPPRESS_SP to work around a docbook-xsl bug. + This workaround used to be enabled by default, but causes problems + with newer versions of docbook-xsl. In addition, there are a few more + knobs you can tweak to work around issues with various versions of the + docbook-xsl package. See comments in Documentation/Makefile for details. + +* Support for building and testing a subset of git on a system without a + working perl has been improved. + + +Fixes since v1.6.2 +------------------ + +All of the fixes in v1.6.2.X maintenance series are included in this +release, unless otherwise noted. + +Here are fixes that this release has, but have not been backported to +v1.6.2.X series. + +* "git-apply" rejected a patch that swaps two files (i.e. renames A to B + and B to A at the same time). May need to be backported by cherry + picking d8c81df and then 7fac0ee). + +* The initial checkout did not read the attributes from the .gitattribute + file that is being checked out. + +* git-gc spent excessive amount of time to decide if an object appears + in a locally existing pack (if needed, backport by merging 69e020a). diff --git a/Documentation/RelNotes/1.6.4.1.txt b/Documentation/RelNotes/1.6.4.1.txt new file mode 100644 index 0000000..e439e45 --- /dev/null +++ b/Documentation/RelNotes/1.6.4.1.txt @@ -0,0 +1,46 @@ +GIT v1.6.4.1 Release Notes +========================== + +Fixes since v1.6.4 +------------------ + + * An unquoted value in the configuration file, when it contains more than + one whitespaces in a row, got them replaced with a single space. + + * "git am" used to accept a single piece of e-mail per file (not a mbox) + as its input, but multiple input format support in v1.6.4 broke it. + Apparently many people have been depending on this feature. + + * The short help text for "git filter-branch" command was a single long + line, wrapped by terminals, and was hard to read. + + * The "recursive" strategy of "git merge" segfaulted when a merge has + more than one merge-bases, and merging of these merge-bases involves + a rename/rename or a rename/add conflict. + + * "git pull --rebase" did not use the right fork point when the + repository has already fetched from the upstream that rewinds the + branch it is based on in an earlier fetch. + + * Explain the concept of fast-forward more fully in "git push" + documentation, and hint to refer to it from an error message when the + command refuses an update to protect the user. + + * The default value for pack.deltacachesize, used by "git repack", is now + 256M, instead of unbounded. Otherwise a repack of a moderately sized + repository would needlessly eat into swap. + + * Document how "git repack" (hence "git gc") interacts with a repository + that borrows its objects from other repositories (e.g. ones created by + "git clone -s"). + + * "git show" on an annotated tag lacked a delimiting blank line between + the tag itself and the contents of the object it tags. + + * "git verify-pack -v" erroneously reported number of objects with too + deep delta depths as "chain length 0" objects. + + * Long names of authors and committers outside US-ASCII were sometimes + incorrectly shown in "gitweb". + +Other minor documentation updates are included. diff --git a/Documentation/RelNotes/1.6.4.2.txt b/Documentation/RelNotes/1.6.4.2.txt new file mode 100644 index 0000000..c11ec01 --- /dev/null +++ b/Documentation/RelNotes/1.6.4.2.txt @@ -0,0 +1,32 @@ +GIT v1.6.4.2 Release Notes +========================== + +Fixes since v1.6.4.1 +-------------------- + +* --date=relative output between 1 and 5 years ago rounded the number of + years when saying X years Y months ago, instead of rounding it down. + +* "git add -p" did not handle changes in executable bits correctly + (a regression around 1.6.3). + +* "git apply" did not honor GNU diff's convention to mark the creation/deletion + event with UNIX epoch timestamp on missing side. + +* "git checkout" incorrectly removed files in a directory pointed by a + symbolic link during a branch switch that replaces a directory with + a symbolic link. + +* "git clean -d -f" happily descended into a subdirectory that is managed by a + separate git repository. It now requires two -f options for safety. + +* "git fetch/push" over http transports had two rather grave bugs. + +* "git format-patch --cover-letter" did not prepare the cover letter file + for use with non-ASCII strings when there are the series contributors with + non-ASCII names. + +* "git pull origin branch" and "git fetch origin && git merge origin/branch" + left different merge messages in the resulting commit. + +Other minor documentation updates are included. diff --git a/Documentation/RelNotes/1.6.4.3.txt b/Documentation/RelNotes/1.6.4.3.txt new file mode 100644 index 0000000..5643e65 --- /dev/null +++ b/Documentation/RelNotes/1.6.4.3.txt @@ -0,0 +1,29 @@ +GIT v1.6.4.3 Release Notes +========================== + +Fixes since v1.6.4.2 +-------------------- + +* "git clone" from an empty repository gave unnecessary error message, + even though it did everything else correctly. + +* "git cvsserver" invoked git commands via "git-foo" style, which has long + been deprecated. + +* "git fetch" and "git clone" had an extra sanity check to verify the + presence of the corresponding *.pack file before downloading *.idx + file by issuing a HEAD request. Github server however sometimes + gave 500 (Internal server error) response to HEAD even if a GET + request for *.pack file to the same URL would have succeeded, and broke + clone over HTTP from some of their repositories. As a workaround, this + verification has been removed (as it is not absolutely necessary). + +* "git grep" did not like relative pathname to refer outside the current + directory when run from a subdirectory. + +* an error message from "git push" was formatted in a very ugly way. + +* "git svn" did not quote the subversion user name correctly when + running its author-prog helper program. + +Other minor documentation updates are included. diff --git a/Documentation/RelNotes/1.6.4.4.txt b/Documentation/RelNotes/1.6.4.4.txt new file mode 100644 index 0000000..0ead45f --- /dev/null +++ b/Documentation/RelNotes/1.6.4.4.txt @@ -0,0 +1,26 @@ +GIT v1.6.4.4 Release Notes +========================== + +Fixes since v1.6.4.4 +-------------------- + +* The workaround for Github server that sometimes gave 500 (Internal server + error) response to HEAD requests in 1.6.4.3 introduced a regression that + caused re-fetching projects over http to segfault in certain cases due + to uninitialized pointer being freed. + +* "git pull" on an unborn branch used to consider anything in the work + tree and the index discardable. + +* "git diff -b/w" did not work well on the incomplete line at the end of + the file, due to an incorrect hashing of lines in the low-level xdiff + routines. + +* "git checkout-index --prefix=$somewhere" used to work when $somewhere is + a symbolic link to a directory elsewhere, but v1.6.4.2 broke it. + +* "git unpack-objects --strict", invoked when receive.fsckobjects + configuration is set in the receiving repository of "git push", did not + properly check the objects, especially the submodule links, it received. + +Other minor documentation updates are included. diff --git a/Documentation/RelNotes/1.6.4.5.txt b/Documentation/RelNotes/1.6.4.5.txt new file mode 100644 index 0000000..eb6307d --- /dev/null +++ b/Documentation/RelNotes/1.6.4.5.txt @@ -0,0 +1,20 @@ +Git v1.6.4.5 Release Notes +========================== + +Fixes since v1.6.4.4 +-------------------- + + * Simplified base85 implementation. + + * An overlong line after ".gitdir: " in a git file caused out of bounds + access to an array on the stack. + + * "git count-objects" did not handle packs larger than 4G. + + * "git rev-parse --parseopt --stop-at-non-option" did not stop at non option + when --keep-dashdash was in effect. + + * "gitweb" can sometimes be tricked into parrotting a filename argument + given in a request without properly quoting. + +Other minor fixes and documentation updates are included. diff --git a/Documentation/RelNotes/1.6.4.txt b/Documentation/RelNotes/1.6.4.txt new file mode 100644 index 0000000..7a90441 --- /dev/null +++ b/Documentation/RelNotes/1.6.4.txt @@ -0,0 +1,147 @@ +GIT v1.6.4 Release Notes +======================== + +With the next major release, "git push" into a branch that is +currently checked out will be refused by default. You can choose +what should happen upon such a push by setting the configuration +variable receive.denyCurrentBranch in the receiving repository. + +To ease the transition plan, the receiving repository of such a +push running this release will issue a big warning when the +configuration variable is missing. Please refer to: + + http://git.or.cz/gitwiki/GitFaq#non-bare + http://thread.gmane.org/gmane.comp.version-control.git/107758/focus=108007 + +for more details on the reason why this change is needed and the +transition plan. + +For a similar reason, "git push $there :$killed" to delete the branch +$killed in a remote repository $there, if $killed branch is the current +branch pointed at by its HEAD, gets a large warning. You can choose what +should happen upon such a push by setting the configuration variable +receive.denyDeleteCurrent in the receiving repository. + + +Updates since v1.6.3 +-------------------- + +(subsystems) + + * gitweb Perl style clean-up. + + * git-svn updates, including a new --authors-prog option to map author + names by invoking an external program, 'git svn reset' to unwind + 'git svn fetch', support for more than one branches, documenting + of the useful --minimize-url feature, new "git svn gc" command, etc. + +(portability) + + * We feed iconv with "UTF-8" instead of "utf8"; the former is + understood more widely. Similarly updated test scripts to use + encoding names more widely understood (e.g. use "ISO8859-1" instead + of "ISO-8859-1"). + + * Various portability fixes/workarounds for different vintages of + SunOS, IRIX, and Windows. + + * Git-over-ssh transport on Windows supports PuTTY plink and TortoisePlink. + +(performance) + + * Many repeated use of lstat() are optimized out in "checkout" codepath. + + * git-status (and underlying git-diff-index --cached) are optimized + to take advantage of cache-tree information in the index. + +(usability, bells and whistles) + + * "git add --edit" lets users edit the whole patch text to fine-tune what + is added to the index. + + * "git am" accepts StGIT series file as its input. + + * "git bisect skip" skips to a more randomly chosen place in the hope + to avoid testing a commit that is too close to a commit that is + already known to be untestable. + + * "git cvsexportcommit" learned -k option to stop CVS keywords expansion + + * "git fast-export" learned to handle history simplification more + gracefully. + + * "git fast-export" learned an option --tag-of-filtered-object to handle + dangling tags resulting from history simplification more usefully. + + * "git grep" learned -p option to show the location of the match using the + same context hunk marker "git diff" uses. + + * https transport can optionally be told that the used client + certificate is password protected, in which case it asks the + password only once. + + * "git imap-send" is IPv6 aware. + + * "git log --graph" draws graphs more compactly by using horizontal lines + when able. + + * "git log --decorate" shows shorter refnames by stripping well-known + refs/* prefix. + + * "git push $name" honors remote.$name.pushurl if present before + using remote.$name.url. In other words, the URL used for fetching + and pushing can be different. + + * "git send-email" understands quoted aliases in .mailrc files (might + have to be backported to 1.6.3.X). + + * "git send-email" can fetch the sender address from the configuration + variable "sendmail.from" (and "sendmail.<identity>.from"). + + * "git show-branch" can color its output. + + * "add" and "update" subcommands to "git submodule" learned --reference + option to use local clone with references. + + * "git submodule update" learned --rebase option to update checked + out submodules by rebasing the local changes. + + * "gitweb" can optionally use gravatar to adorn author/committer names. + +(developers) + + * A major part of the "git bisect" wrapper has moved to C. + + * Formatting with the new version of AsciiDoc 8.4.1 is now supported. + +Fixes since v1.6.3 +------------------ + +All of the fixes in v1.6.3.X maintenance series are included in this +release, unless otherwise noted. + +Here are fixes that this release has, but have not been backported to +v1.6.3.X series. + + * "git diff-tree -r -t" used to omit new or removed directories from + the output. df533f3 (diff-tree -r -t: include added/removed + directories in the output, 2009-06-13) may need to be cherry-picked + to backport this fix. + + * The way Git.pm sets up a Repository object was not friendly to callers + that chdir around. It now internally records the repository location + as an absolute path when autodetected. + + * Removing a section with "git config --remove-section", when its + section header has a variable definition on the same line, lost + that variable definition. + + * "git rebase -p --onto" used to always leave side branches of a merge + intact, even when both branches are subject to rewriting. + + * "git repack" used to faithfully follow grafts and considered true + parents recorded in the commit object unreachable from the commit. + After such a repacking, you cannot remove grafts without corrupting + the repository. + + * "git send-email" did not detect erroneous loops in alias expansion. diff --git a/Documentation/RelNotes/1.6.5.1.txt b/Documentation/RelNotes/1.6.5.1.txt new file mode 100644 index 0000000..309ba18 --- /dev/null +++ b/Documentation/RelNotes/1.6.5.1.txt @@ -0,0 +1,20 @@ +GIT v1.6.5.1 Release Notes +========================== + +Fixes since v1.6.5 +------------------ + + * An corrupt pack could make codepath to read objects into an + infinite loop. + + * Download throughput display was always shown in KiB/s but on fast links + it is more appropriate to show it in MiB/s. + + * "git grep -f filename" used uninitialized variable and segfaulted. + + * "git clone -b branch" gave a wrong commit object name to post-checkout + hook. + + * "git pull" over http did not work on msys. + +Other minor documentation updates are included. diff --git a/Documentation/RelNotes/1.6.5.2.txt b/Documentation/RelNotes/1.6.5.2.txt new file mode 100644 index 0000000..aa7ccce --- /dev/null +++ b/Documentation/RelNotes/1.6.5.2.txt @@ -0,0 +1,19 @@ +GIT v1.6.5.2 Release Notes +========================== + +Fixes since v1.6.5.1 +-------------------- + + * Installation of templates triggered a bug in busybox when using tar + implementation from it. + + * "git add -i" incorrectly ignored paths that are already in the index + if they matched .gitignore patterns. + + * "git describe --always" should have produced some output even there + were no tags in the repository, but it didn't. + + * "git ls-files" when showing tracked files incorrectly paid attention + to the exclude patterns. + +Other minor documentation updates are included. diff --git a/Documentation/RelNotes/1.6.5.3.txt b/Documentation/RelNotes/1.6.5.3.txt new file mode 100644 index 0000000..b2fad1b --- /dev/null +++ b/Documentation/RelNotes/1.6.5.3.txt @@ -0,0 +1,63 @@ +Git v1.6.5.3 Release Notes +========================== + +Fixes since v1.6.5.2 +-------------------- + + * info/grafts file didn't ignore trailing CR at the end of lines. + + * Packages generated on newer FC were unreadable by older versions of + RPM as the new default is to use stronger hash. + + * output from "git blame" was unreadable when the file ended in an + incomplete line. + + * "git add -i/-p" didn't handle deletion of empty files correctly. + + * "git clone" takes up to two parameters, but did not complain when + given more arguments than necessary and silently ignored them. + + * "git cvsimport" did not read files given as command line arguments + correctly when it is run from a subdirectory. + + * "git diff --color-words -U0" didn't work correctly. + + * The handling of blank lines at the end of file by "git diff/apply + --whitespace" was inconsistent with the other kinds of errors. + They are now colored, warned against, and fixed the same way as others. + + * There was no way to allow blank lines at the end of file without + allowing extra blanks at the end of lines. You can use blank-at-eof + and blank-at-eol whitespace error class to specify them separately. + The old trailing-space error class is now a short-hand to set both. + + * "-p" option to "git format-patch" was supposed to suppress diffstat + generation, but it was broken since 1.6.1. + + * "git imap-send" did not compile cleanly with newer OpenSSL. + + * "git help -a" outside of a git repository was broken. + + * "git ls-files -i" was supposed to be inverse of "git ls-files" without -i + with respect to exclude patterns, but it was broken since 1.6.5.2. + + * "git ls-remote" outside of a git repository over http was broken. + + * "git rebase -i" gave bogus error message when the command word was + misspelled. + + * "git receive-pack" that is run in response to "git push" did not run + garbage collection nor update-server-info, but in larger hosting sites, + these almost always need to be run. To help site administrators, the + command now runs "gc --auto" and "u-s-i" by setting receive.autogc + and receive.updateserverinfo configuration variables, respectively. + + * Release notes spelled the package name with incorrect capitalization. + + * "gitweb" did not escape non-ascii characters correctly in the URL. + + * "gitweb" showed "patch" link even for merge commits. + + * "gitweb" showed incorrect links for blob line numbers in pathinfo mode. + +Other minor documentation updates are included. diff --git a/Documentation/RelNotes/1.6.5.4.txt b/Documentation/RelNotes/1.6.5.4.txt new file mode 100644 index 0000000..d3a2a3e --- /dev/null +++ b/Documentation/RelNotes/1.6.5.4.txt @@ -0,0 +1,32 @@ +Git v1.6.5.4 Release Notes +========================== + +Fixes since v1.6.5.3 +-------------------- + + * "git help" (without argument) used to check if you are in a directory + under git control. There was no breakage in behaviour per-se, but this + was unnecessary. + + * "git prune-packed" gave progress output even when its standard error is + not connected to a terminal; this caused cron jobs that run it to + produce crufts. + + * "git pack-objects --all-progress" is an option to ask progress output + from write-object phase _if_ progress output were to be produced, and + shouldn't have forced the progress output. + + * "git apply -p<n> --directory=<elsewhere>" did not work well for a + non-default value of n. + + * "git merge foo HEAD" was misparsed as an old-style invocation of the + command and produced a confusing error message. As it does not specify + any other branch to merge, it shouldn't be mistaken as such. We will + remove the old style "git merge <message> HEAD <commit>..." syntax in + future versions, but not in this release, + + * "git merge -m <message> <branch>..." added the standard merge message + on its own after user-supplied message, which should have overridden the + standard one. + +Other minor documentation updates are included. diff --git a/Documentation/RelNotes/1.6.5.5.txt b/Documentation/RelNotes/1.6.5.5.txt new file mode 100644 index 0000000..ecfc57d --- /dev/null +++ b/Documentation/RelNotes/1.6.5.5.txt @@ -0,0 +1,49 @@ +Git v1.6.5.5 Release Notes +========================== + +Fixes since v1.6.5.4 +-------------------- + + * Manual pages can be formatted with older xmlto again. + + * GREP_OPTIONS exported from user's environment could have broken + our scripted commands. + + * In configuration files, a few variables that name paths can begin with + ~/ and ~username/ and they are expanded as expected. This is not a + bugfix but 1.6.6 will have this and without backporting users cannot + easily use the same ~/.gitconfig across versions. + + * "git diff -B -M" did the same computation to hash lines of contents + twice, and held onto memory after it has used the data in it + unnecessarily before it freed. + + * "git diff -B" and "git diff --dirstat" was not counting newly added + contents correctly. + + * "git format-patch revisions... -- path" issued an incorrect error + message that suggested to use "--" on the command line when path + does not exist in the current work tree (it is a separate matter if + it makes sense to limit format-patch with pathspecs like that + without using the --full-diff option). + + * "git grep -F -i StRiNg" did not work as expected. + + * Enumeration of available merge strategies iterated over the list of + commands in a wrong way, sometimes producing an incorrect result. + + * "git shortlog" did not honor the "encoding" header embedded in the + commit object like "git log" did. + + * Reading progress messages that come from the remote side while running + "git pull" is given precedence over reading the actual pack data to + prevent garbled progress message on the user's terminal. + + * "git rebase" got confused when the log message began with certain + strings that looked like Subject:, Date: or From: header. + + * "git reset" accidentally run in .git/ directory checked out the + work tree contents in there. + + +Other minor documentation updates are included. diff --git a/Documentation/RelNotes/1.6.5.6.txt b/Documentation/RelNotes/1.6.5.6.txt new file mode 100644 index 0000000..a9eaf76 --- /dev/null +++ b/Documentation/RelNotes/1.6.5.6.txt @@ -0,0 +1,23 @@ +Git v1.6.5.6 Release Notes +========================== + +Fixes since v1.6.5.5 +-------------------- + + * "git add -p" had a regression since v1.6.5.3 that broke deletion of + non-empty files. + + * "git archive -o o.zip -- Makefile" produced an archive in o.zip + but in POSIX tar format. + + * Error message given to "git pull --rebase" when the user didn't give + enough clue as to what branch to integrate with still talked about + "merging with" the branch. + + * Error messages given by "git merge" when the merge resulted in a + fast-forward still were in plumbing lingo, even though in v1.6.5 + we reworded messages in other cases. + + * The post-upload-hook run by upload-pack in response to "git fetch" has + been removed, due to security concerns (the hook first appeared in + 1.6.5). diff --git a/Documentation/RelNotes/1.6.5.7.txt b/Documentation/RelNotes/1.6.5.7.txt new file mode 100644 index 0000000..dc5302c --- /dev/null +++ b/Documentation/RelNotes/1.6.5.7.txt @@ -0,0 +1,19 @@ +Git v1.6.5.7 Release Notes +========================== + +Fixes since v1.6.5.6 +-------------------- + +* If a user specifies a color for a <slot> (i.e. a class of things to show + in a particular color) that is known only by newer versions of git + (e.g. "color.diff.func" was recently added for upcoming 1.6.6 release), + an older version of git should just ignore them. Instead we diagnosed + it as an error. + +* With help.autocorrect set to non-zero value, the logic to guess typos + in the subcommand name misfired and ran a random nonsense command. + +* If a command is run with an absolute path as a pathspec inside a bare + repository, e.g. "rev-list HEAD -- /home", the code tried to run + strlen() on NULL, which is the result of get_git_work_tree(), and + segfaulted. diff --git a/Documentation/RelNotes/1.6.5.8.txt b/Documentation/RelNotes/1.6.5.8.txt new file mode 100644 index 0000000..8b24beb --- /dev/null +++ b/Documentation/RelNotes/1.6.5.8.txt @@ -0,0 +1,28 @@ +Git v1.6.5.8 Release Notes +========================== + +Fixes since v1.6.5.7 +-------------------- + +* "git count-objects" did not handle packfiles that are bigger than 4G on + platforms with 32-bit off_t. + +* "git rebase -i" did not abort cleanly if it failed to launch the editor. + +* "git blame" did not work well when commit lacked the author name. + +* "git fast-import" choked when handling a tag that points at an object + that is not a commit. + +* "git reset --hard" did not work correctly when GIT_WORK_TREE environment + variable is used to point at the root of the true work tree. + +* "git grep" fed a buffer that is not NUL-terminated to underlying + regexec(). + +* "git checkout -m other" while on a branch that does not have any commit + segfaulted, instead of failing. + +* "git branch -a other" should have diagnosed the command as an error. + +Other minor documentation updates are also included. diff --git a/Documentation/RelNotes/1.6.5.9.txt b/Documentation/RelNotes/1.6.5.9.txt new file mode 100644 index 0000000..bb469dd --- /dev/null +++ b/Documentation/RelNotes/1.6.5.9.txt @@ -0,0 +1,18 @@ +Git v1.6.5.9 Release Notes +========================== + +Fixes since v1.6.5.8 +-------------------- + + * An overlong line after ".gitdir: " in a git file caused out of bounds + access to an array on the stack. + + * "git blame -L $start,$end" segfaulted when too large $start was given. + + * "git rev-parse --parseopt --stop-at-non-option" did not stop at non option + when --keep-dashdash was in effect. + + * "gitweb" can sometimes be tricked into parrotting a filename argument + given in a request without properly quoting. + +Other minor fixes and documentation updates are included. diff --git a/Documentation/RelNotes/1.6.5.txt b/Documentation/RelNotes/1.6.5.txt new file mode 100644 index 0000000..ee141c1 --- /dev/null +++ b/Documentation/RelNotes/1.6.5.txt @@ -0,0 +1,169 @@ +GIT v1.6.5 Release Notes +======================== + +In git 1.7.0, which was planned to be the release after 1.6.5, "git +push" into a branch that is currently checked out will be refused by +default. + +You can choose what should happen upon such a push by setting the +configuration variable receive.denyCurrentBranch in the receiving +repository. + +Also, "git push $there :$killed" to delete the branch $killed in a remote +repository $there, when $killed branch is the current branch pointed at by +its HEAD, will be refused by default. + +You can choose what should happen upon such a push by setting the +configuration variable receive.denyDeleteCurrent in the receiving +repository. + +To ease the transition plan, the receiving repository of such a +push running this release will issue a big warning when the +configuration variable is missing. Please refer to: + + http://git.or.cz/gitwiki/GitFaq#non-bare + http://thread.gmane.org/gmane.comp.version-control.git/107758/focus=108007 + +for more details on the reason why this change is needed and the +transition plan. + +Updates since v1.6.4 +-------------------- + +(subsystems) + + * various updates to gitk, git-svn and gitweb. + +(portability) + + * more improvements on mingw port. + + * mingw will also give FRSX as the default value for the LESS + environment variable when the user does not have one. + + * initial support to compile git on Windows with MSVC. + +(performance) + + * On major platforms, the system can be compiled to use with Linus's + block-sha1 implementation of the SHA-1 hash algorithm, which + outperforms the default fallback implementation we borrowed from + Mozilla. + + * Unnecessary inefficiency in deepening of a shallow repository has + been removed. + + * "git clone" does not grab objects that it does not need (i.e. + referenced only from refs outside refs/heads and refs/tags + hierarchy) anymore. + + * The "git" main binary used to link with libcurl, which then dragged + in a large number of external libraries. When using basic plumbing + commands in scripts, this unnecessarily slowed things down. We now + implement http/https/ftp transfer as a separate executable as we + used to. + + * "git clone" run locally hardlinks or copies the files in .git/ to + newly created repository. It used to give new mtime to copied files, + but this delayed garbage collection to trigger unnecessarily in the + cloned repository. We now preserve mtime for these files to avoid + this issue. + +(usability, bells and whistles) + + * Human writable date format to various options, e.g. --since=yesterday, + master@{2000.09.17}, are taught to infer some omitted input properly. + + * A few programs gave verbose "advice" messages to help uninitiated + people when issuing error messages. An infrastructure to allow + users to squelch them has been introduced, and a few such messages + can be silenced now. + + * refs/replace/ hierarchy is designed to be usable as a replacement + of the "grafts" mechanism, with the added advantage that it can be + transferred across repositories. + + * "git am" learned to optionally ignore whitespace differences. + + * "git am" handles input e-mail files that has CRLF line endings sensibly. + + * "git am" learned "--scissors" option to allow you to discard early part + of an incoming e-mail. + + * "git archive -o output.zip" works without being told what format to + use with an explicit "--format=zip".option. + + * "git checkout", "git reset" and "git stash" learned to pick and + choose to use selected changes you made, similar to "git add -p". + + * "git clone" learned a "-b" option to pick a HEAD to check out + different from the remote's default branch. + + * "git clone" learned --recursive option. + + * "git clone" from a local repository on a different filesystem used to + copy individual object files without preserving the old timestamp, giving + them extra lifetime in the new repository until they gc'ed. + + * "git commit --dry-run $args" is a new recommended way to ask "what would + happen if I try to commit with these arguments." + + * "git commit --dry-run" and "git status" shows conflicted paths in a + separate section to make them easier to spot during a merge. + + * "git cvsimport" now supports password-protected pserver access even + when the password is not taken from ~/.cvspass file. + + * "git fast-export" learned --no-data option that can be useful when + reordering commits and trees without touching the contents of + blobs. + + * "git fast-import" has a pair of new front-end in contrib/ area. + + * "git init" learned to mkdir/chdir into a directory when given an + extra argument (i.e. "git init this"). + + * "git instaweb" optionally can use mongoose as the web server. + + * "git log --decorate" can optionally be told with --decorate=full to + give the reference name in full. + + * "git merge" issued an unnecessarily scary message when it detected + that the merge may have to touch the path that the user has local + uncommitted changes to. The message has been reworded to make it + clear that the command aborted, without doing any harm. + + * "git push" can be told to be --quiet. + + * "git push" pays attention to url.$base.pushInsteadOf and uses a URL + that is derived from the URL used for fetching. + + * informational output from "git reset" that lists the locally modified + paths is made consistent with that of "git checkout $another_branch". + + * "git submodule" learned to give submodule name to scripts run with + "foreach" subcommand. + + * various subcommands to "git submodule" learned --recursive option. + + * "git submodule summary" learned --files option to compare the work + tree vs the commit bound at submodule path, instead of comparing + the index. + + * "git upload-pack", which is the server side support for "git clone" and + "git fetch", can call a new post-upload-pack hook for statistics purposes. + +(developers) + + * With GIT_TEST_OPTS="--root=/p/a/t/h", tests can be run outside the + source directory; using tmpfs may give faster turnaround. + + * With NO_PERL_MAKEMAKER set, DESTDIR= is now honoured, so you can + build for one location, and install into another location to tar it + up. + +Fixes since v1.6.4 +------------------ + +All of the fixes in v1.6.4.X maintenance series are included in this +release, unless otherwise noted. diff --git a/Documentation/RelNotes/1.6.6.1.txt b/Documentation/RelNotes/1.6.6.1.txt new file mode 100644 index 0000000..f1d0a4a --- /dev/null +++ b/Documentation/RelNotes/1.6.6.1.txt @@ -0,0 +1,37 @@ +Git v1.6.6.1 Release Notes +========================== + +Fixes since v1.6.6 +------------------ + + * "git blame" did not work well when commit lacked the author name. + + * "git branch -a name" wasn't diagnosed as an error. + + * "git count-objects" did not handle packfiles that are bigger than 4G on + platforms with 32-bit off_t. + + * "git checkout -m other" while on a branch that does not have any commit + segfaulted, instead of failing. + + * "git fast-import" choked when fed a tag that do not point at a + commit. + + * "git grep" finding from work tree files could have fed garbage to + the underlying regexec(3). + + * "git grep -L" didn't show empty files (they should never match, and + they should always appear in -L output as unmatching). + + * "git rebase -i" did not abort cleanly if it failed to launch the editor. + + * "git reset --hard" did not work correctly when GIT_WORK_TREE environment + variable is used to point at the root of the true work tree. + + * http-backend was not listed in the command list in the documentation. + + * Building on FreeBSD (both 7 and 8) needs OLD_ICONV set in the Makefile + + * "git checkout -m some-branch" while on an unborn branch crashed. + +Other minor documentation updates are included. diff --git a/Documentation/RelNotes/1.6.6.2.txt b/Documentation/RelNotes/1.6.6.2.txt new file mode 100644 index 0000000..4eaddc0 --- /dev/null +++ b/Documentation/RelNotes/1.6.6.2.txt @@ -0,0 +1,46 @@ +Git v1.6.6.2 Release Notes +========================== + +Fixes since v1.6.6.1 +-------------------- + + * recursive merge didn't correctly diagnose its own programming errors, + and instead caused the caller to segfault. + + * The new "smart http" aware clients probed the web servers to see if + they support smart http, but did not fall back to dumb http transport + correctly with some servers. + + * Time based reflog syntax e.g. "@{yesterday}" didn't diagnose a misspelled + time specification and instead assumed "@{now}". + + * "git archive HEAD -- no-such-directory" produced an empty archive + without complaining. + + * "git blame -L start,end -- file" misbehaved when given a start that is + larger than the number of lines in the file. + + * "git checkout -m" didn't correctly call custom merge backend supplied + by the end user. + + * "git config -f <file>" misbehaved when run from a subdirectory. + + * "git cvsserver" didn't like having regex metacharacters (e.g. '+') in + CVSROOT environment. + + * "git fast-import" did not correctly handle large blobs that may + bust the pack size limit. + + * "git gui" is supposed to work even when launched from inside a .git + directory. + + * "git gui" misbehaved when applying a hunk that ends with deletion. + + * "git imap-send" did not honor imap.preformattedHTML as documented. + + * "git log" family incorrectly showed the commit notes unconditionally by + mistake, which was especially irritating when running "git log --oneline". + + * "git status" shouldn't require an write access to the repository. + +Other minor documentation updates are included. diff --git a/Documentation/RelNotes/1.6.6.3.txt b/Documentation/RelNotes/1.6.6.3.txt new file mode 100644 index 0000000..11483ac --- /dev/null +++ b/Documentation/RelNotes/1.6.6.3.txt @@ -0,0 +1,23 @@ +Git v1.6.6.3 Release Notes +========================== + +Fixes since v1.6.6.2 +-------------------- + + * An overlong line after ".gitdir: " in a git file caused out of bounds + access to an array on the stack. + + * "git bisect $path" did not correctly diagnose an error when given a + non-existent path. + + * "git blame -L $start,$end" segfaulted when too large $start was given. + + * "git imap-send" did not write draft box with CRLF line endings per RFC. + + * "git rev-parse --parseopt --stop-at-non-option" did not stop at non option + when --keep-dashdash was in effect. + + * "gitweb" can sometimes be tricked into parrotting a filename argument + given in a request without properly quoting. + +Other minor fixes and documentation updates are included. diff --git a/Documentation/RelNotes/1.6.6.txt b/Documentation/RelNotes/1.6.6.txt new file mode 100644 index 0000000..c50b59c --- /dev/null +++ b/Documentation/RelNotes/1.6.6.txt @@ -0,0 +1,224 @@ +Git v1.6.6 Release Notes +======================== + +Notes on behaviour change +------------------------- + + * In this release, "git fsck" defaults to "git fsck --full" and + checks packfiles, and because of this it will take much longer to + complete than before. If you prefer a quicker check only on loose + objects (the old default), you can say "git fsck --no-full". This + has been supported by 1.5.4 and newer versions of git, so it is + safe to write it in your script even if you use slightly older git + on some of your machines. + +Preparing yourselves for compatibility issues in 1.7.0 +------------------------------------------------------ + +In git 1.7.0, which is planned to be the release after 1.6.6, there will +be a handful of behaviour changes that will break backward compatibility. + +These changes were discussed long time ago and existing behaviours have +been identified as more problematic to the userbase than keeping them for +the sake of backward compatibility. + +When necessary, a transition strategy for existing users has been designed +not to force them running around setting configuration variables and +updating their scripts in order to either keep the traditional behaviour +or adjust to the new behaviour, on the day their sysadmin decides to install +the new version of git. When we switched from "git-foo" to "git foo" in +1.6.0, even though the change had been advertised and the transition +guide had been provided for a very long time, the users procrastinated +during the entire transition period, and ended up panicking on the day +their sysadmins updated their git installation. We are trying to avoid +repeating that unpleasantness in the 1.7.0 release. + +For changes decided to be in 1.7.0, commands that will be affected +have been much louder to strongly discourage such procrastination, and +they continue to be in this release. If you have been using recent +versions of git, you would have seen warnings issued when you used +features whose behaviour will change, with a clear instruction on how +to keep the existing behaviour if you want to. You hopefully are +already well prepared. + +Of course, we have also been giving "this and that will change in +1.7.0; prepare yourselves" warnings in the release notes and +announcement messages for the past few releases. Let's see how well +users will fare this time. + + * "git push" into a branch that is currently checked out (i.e. pointed by + HEAD in a repository that is not bare) will be refused by default. + + Similarly, "git push $there :$killed" to delete the branch $killed + in a remote repository $there, when $killed branch is the current + branch pointed at by its HEAD, will be refused by default. + + Setting the configuration variables receive.denyCurrentBranch and + receive.denyDeleteCurrent to 'ignore' in the receiving repository + can be used to override these safety features. Versions of git + since 1.6.2 have issued a loud warning when you tried to do these + operations without setting the configuration, so repositories of + people who still need to be able to perform such a push should + already have been future proofed. + + Please refer to: + + http://git.or.cz/gitwiki/GitFaq#non-bare + http://thread.gmane.org/gmane.comp.version-control.git/107758/focus=108007 + + for more details on the reason why this change is needed and the + transition process that already took place so far. + + * "git send-email" will not make deep threads by default when sending a + patch series with more than two messages. All messages will be sent + as a reply to the first message, i.e. cover letter. Git 1.6.6 (this + release) will issue a warning about the upcoming default change, when + it uses the traditional "deep threading" behaviour as the built-in + default. To squelch the warning but still use the "deep threading" + behaviour, give --chain-reply-to option or set sendemail.chainreplyto + to true. + + It has been possible to configure send-email to send "shallow thread" + by setting sendemail.chainreplyto configuration variable to false. + The only thing 1.7.0 release will do is to change the default when + you haven't configured that variable. + + * "git status" will not be "git commit --dry-run". This change does not + affect you if you run the command without pathspec. + + Nobody sane found the current behaviour of "git status Makefile" useful + nor meaningful, and it confused users. "git commit --dry-run" has been + provided as a way to get the current behaviour of this command since + 1.6.5. + + * "git diff" traditionally treated various "ignore whitespace" options + only as a way to filter the patch output. "git diff --exit-code -b" + exited with non-zero status even if all changes were about changing the + amount of whitespace and nothing else. and "git diff -b" showed the + "diff --git" header line for such a change without patch text. + + In 1.7.0, the "ignore whitespaces" will affect the semantics of the + diff operation itself. A change that does not affect anything but + whitespaces will be reported with zero exit status when run with + --exit-code, and there will not be "diff --git" header for such a + change. + + +Updates since v1.6.5 +-------------------- + +(subsystems) + + * various gitk updates including use of themed widgets under Tk 8.5, + Japanese translation, a fix to a bug when running "gui blame" from + a subdirectory, etc. + + * various git-gui updates including new translations, wm states fixes, + Tk bug workaround after quitting, improved heuristics to trigger gc, + etc. + + * various git-svn updates. + + * "git fetch" over http learned a new mode that is different from the + traditional "dumb commit walker". + +(portability) + + * imap-send can be built on mingw port. + +(performance) + + * "git diff -B" has smaller memory footprint. + +(usability, bells and whistles) + + * The object replace mechanism can be bypassed with --no-replace-objects + global option given to the "git" program. + + * In configuration files, a few variables that name paths can begin with ~/ + and ~username/ and they are expanded as expected. + + * "git subcmd -h" now shows short usage help for many more subcommands. + + * "git bisect reset" can reset to an arbitrary commit. + + * "git checkout frotz" when there is no local branch "frotz" but there + is only one remote tracking branch "frotz" is taken as a request to + start the named branch at the corresponding remote tracking branch. + + * "git commit -c/-C/--amend" can be told with a new "--reset-author" option + to ignore authorship information in the commit it is taking the message + from. + + * "git describe" can be told to add "-dirty" suffix with "--dirty" option. + + * "git diff" learned --submodule option to show a list of one-line logs + instead of differences between the commit object names. + + * "git diff" learned to honor diff.color.func configuration to paint + function name hint printed on the hunk header "@@ -j,k +l,m @@" line + in the specified color. + + * "git fetch" learned --all and --multiple options, to run fetch from + many repositories, and --prune option to remove remote tracking + branches that went stale. These make "git remote update" and "git + remote prune" less necessary (there is no plan to remove "remote + update" nor "remote prune", though). + + * "git fsck" by default checks the packfiles (i.e. "--full" is the + default); you can turn it off with "git fsck --no-full". + + * "git grep" can use -F (fixed strings) and -i (ignore case) together. + + * import-tars contributed fast-import frontend learned more types of + compressed tarballs. + + * "git instaweb" knows how to talk with mod_cgid to apache2. + + * "git log --decorate" shows the location of HEAD as well. + + * "git log" and "git rev-list" learned to take revs and pathspecs from + the standard input with the new "--stdin" option. + + * "--pretty=format" option to "log" family of commands learned: + + . to wrap text with the "%w()" specifier. + . to show reflog information with "%g[sdD]" specifier. + + * "git notes" command to annotate existing commits. + + * "git merge" (and "git pull") learned --ff-only option to make it fail + if the merge does not result in a fast-forward. + + * "git mergetool" learned to use p4merge. + + * "git rebase -i" learned "reword" that acts like "edit" but immediately + starts an editor to tweak the log message without returning control to + the shell, which is done by "edit" to give an opportunity to tweak the + contents. + + * "git send-email" can be told with "--envelope-sender=auto" to use the + same address as "From:" address as the envelope sender address. + + * "git send-email" will issue a warning when it defaults to the + --chain-reply-to behaviour without being told by the user and + instructs to prepare for the change of the default in 1.7.0 release. + + * In "git submodule add <repository> <path>", <path> is now optional and + inferred from <repository> the same way "git clone <repository>" does. + + * "git svn" learned to read SVN 1.5+ and SVK merge tickets. + + * "git svn" learned to recreate empty directories tracked only by SVN. + + * "gitweb" can optionally render its "blame" output incrementally (this + requires JavaScript on the client side). + + * Author names shown in gitweb output are links to search commits by the + author. + +Fixes since v1.6.5 +------------------ + +All of the fixes in v1.6.5.X maintenance series are included in this +release, unless otherwise noted. diff --git a/Documentation/RelNotes/1.7.0.1.txt b/Documentation/RelNotes/1.7.0.1.txt new file mode 100644 index 0000000..8ff5bca --- /dev/null +++ b/Documentation/RelNotes/1.7.0.1.txt @@ -0,0 +1,35 @@ +Git v1.7.0.1 Release Notes +========================== + +Fixes since v1.7.0 +------------------ + + * In a freshly created repository "rev-parse HEAD^0" complained that + it is dangling symref, even though "rev-parse HEAD" didn't. + + * "git show :no-such-name" tried to access the index without bounds + check, leading to a potential segfault. + + * Message from "git cherry-pick" was harder to read and use than necessary + when it stopped due to conflicting changes. + + * We referred to ".git/refs/" throughout the documentation when we + meant to talk about abstract notion of "ref namespace". Because + people's repositories often have packed refs these days, this was + confusing. + + * "git diff --output=/path/that/cannot/be/written" did not correctly + error out. + + * "git grep -e -pattern-that-begin-with-dash paths..." could not be + spelled as "git grep -- -pattern-that-begin-with-dash paths..." which + would be a GNU way to use "--" as "end of options". + + * "git grep" compiled with threading support tried to access an + uninitialized mutex on boxes with a single CPU. + + * "git stash pop -q --index" failed because the unnecessary --index + option was propagated to "git stash drop" that is internally run at the + end. + +And other minor fixes and documentation updates. diff --git a/Documentation/RelNotes/1.7.0.2.txt b/Documentation/RelNotes/1.7.0.2.txt new file mode 100644 index 0000000..fcb46ca --- /dev/null +++ b/Documentation/RelNotes/1.7.0.2.txt @@ -0,0 +1,40 @@ +Git v1.7.0.2 Release Notes +========================== + +Fixes since v1.7.0.1 +-------------------- + + * GIT_PAGER was not honored consistently by some scripted Porcelains, most + notably "git am". + + * updating working tree files after telling git to add them to the + index and while it is still working created garbage object files in + the repository without diagnosing it as an error. + + * "git bisect -- pathspec..." did not diagnose an error condition properly when + the simplification with given pathspec made the history empty. + + * "git rev-list --cherry-pick A...B" now has an obvious optimization when the + histories haven't diverged (i.e. when one end is an ancestor of the other). + + * "git diff --quiet -w" did not work as expected. + + * "git fast-import" didn't work with a large input, as it lacked support + for producing the pack index in v2 format. + + * "git imap-send" didn't use CRLF line endings over the imap protocol + when storing its payload to the draft box, violating RFC 3501. + + * "git log --format='%w(x,y,z)%b'" and friends that rewrap message + has been optimized for utf-8 payload. + + * Error messages generated on the receiving end did not come back to "git + push". + + * "git status" in 1.7.0 lacked the optimization we used to have in 1.6.X series + to speed up scanning of large working tree. + + * "gitweb" did not diagnose parsing errors properly while reading tis configuration + file. + +And other minor fixes and documentation updates. diff --git a/Documentation/RelNotes/1.7.0.3.txt b/Documentation/RelNotes/1.7.0.3.txt new file mode 100644 index 0000000..3b35573 --- /dev/null +++ b/Documentation/RelNotes/1.7.0.3.txt @@ -0,0 +1,34 @@ +Git v1.7.0.3 Release Notes +========================== + +Fixes since v1.7.0.2 +-------------------- + + * Object files are created in a more ACL friendly way in repositories + where group permission is ACL controlled. + + * "git add -i" didn't handle a deleted path very well. + + * "git blame" padded line numbers with one extra SP when the total number + of lines was one less than multiple of ten due to an off-by-one error. + + * "git fetch --all/--multi" used to discard information for remotes that + are fetched earlier. + + * "git log --author=me --grep=it" tried to find commits that have "it" + or are written by "me", instead of the ones that have "it" _and_ are + written by "me". + + * "git log -g branch" misbehaved when there was no entries in the reflog + for the named branch. + + * "git mailinfo" (hence "git am") incorrectly removed initial indent from + paragraphs. + + * "git prune" and "git reflog" (hence "git gc" as well) didn't honor + an instruction never to expire by setting gc.reflogexpire to never. + + * "git push" misbehaved when branch.<name>.merge was configured without + matching branch.<name>.remote. + +And other minor fixes and documentation updates. diff --git a/Documentation/RelNotes/1.7.0.4.txt b/Documentation/RelNotes/1.7.0.4.txt new file mode 100644 index 0000000..cf7f60e --- /dev/null +++ b/Documentation/RelNotes/1.7.0.4.txt @@ -0,0 +1,27 @@ +Git v1.7.0.4 Release Notes +========================== + +Fixes since v1.7.0.3 +-------------------- + + * Optimized ntohl/htonl on big-endian machines were broken. + + * Color values given to "color.<cmd>.<slot>" configuration can now have + more than one attributes (e.g. "bold ul"). + + * "git add -u nonexistent-path" did not complain. + + * "git apply --whitespace=fix" didn't work well when an early patch in + a patch series adds trailing blank lines and a later one depended on + such a block of blank lines at the end. + + * "git fast-export" didn't check error status and stop when marks file + cannot be opened. + + * "git format-patch --ignore-if-in-upstream" gave unwarranted errors + when the range was empty, instead of silently finishing. + + * "git remote prune" did not detect remote tracking refs that became + dangling correctly. + +And other minor fixes and documentation updates. diff --git a/Documentation/RelNotes/1.7.0.5.txt b/Documentation/RelNotes/1.7.0.5.txt new file mode 100644 index 0000000..3149c91 --- /dev/null +++ b/Documentation/RelNotes/1.7.0.5.txt @@ -0,0 +1,26 @@ +Git v1.7.0.5 Release Notes +========================== + +Fixes since v1.7.0.4 +-------------------- + + * "git daemon" failed to compile on platforms without sockaddr_storage type. + + * Output from "git rev-list --pretty=oneline" was unparsable when a + commit did not have any message, which is abnormal but possible in a + repository converted from foreign scm. + + * "git stash show <commit-that-is-not-a-stash>" gave an error message + that was not so useful. Reworded the message to "<it> is not a + stash". + + * Python scripts in contrib/ area now start with "#!/usr/bin/env python" + to honor user's PATH. + + * "git imap-send" used to mistake any line that begins with "From " as a + message separator in format-patch output. + + * Smart http server backend failed to report an internal server error and + infinitely looped instead after output pipe was closed. + +And other minor fixes and documentation updates. diff --git a/Documentation/RelNotes/1.7.0.6.txt b/Documentation/RelNotes/1.7.0.6.txt new file mode 100644 index 0000000..b2852b6 --- /dev/null +++ b/Documentation/RelNotes/1.7.0.6.txt @@ -0,0 +1,13 @@ +Git v1.7.0.6 Release Notes +========================== + +Fixes since v1.7.0.5 +-------------------- + + * "git diff --stat" used "int" to count the size of differences, + which could result in overflowing. + + * "git rev-list --abbrev-commit" defaulted to 40-byte abbreviations, unlike + newer tools in the git toolset. + +And other minor fixes and documentation updates. diff --git a/Documentation/RelNotes/1.7.0.7.txt b/Documentation/RelNotes/1.7.0.7.txt new file mode 100644 index 0000000..d0cb7ca --- /dev/null +++ b/Documentation/RelNotes/1.7.0.7.txt @@ -0,0 +1,16 @@ +Git v1.7.0.7 Release Notes +========================== + +Fixes since v1.7.0.6 +-------------------- + + * "make NO_CURL=NoThanks install" was broken. + + * An overlong line after ".gitdir: " in a git file caused out of bounds + access to an array on the stack. + + * "git config --path conf.var" to attempt to expand a variable conf.var + that uses "~/" short-hand segfaulted when $HOME environment variable + was not set. + +And other minor fixes and documentation updates. diff --git a/Documentation/RelNotes/1.7.0.8.txt b/Documentation/RelNotes/1.7.0.8.txt new file mode 100644 index 0000000..7f05b48 --- /dev/null +++ b/Documentation/RelNotes/1.7.0.8.txt @@ -0,0 +1,10 @@ +Git v1.7.0.8 Release Notes +========================== + +This is primarily to backport support for the new "add.ignoreErrors" +name given to the existing "add.ignore-errors" configuration variable. + +The next version, Git 1.7.4, and future versions, will support both +old and incorrect name and the new corrected name, but without this +backport, users who want to use the new name "add.ignoreErrors" in +their repositories cannot use older versions of Git. diff --git a/Documentation/RelNotes/1.7.0.9.txt b/Documentation/RelNotes/1.7.0.9.txt new file mode 100644 index 0000000..bfb3166 --- /dev/null +++ b/Documentation/RelNotes/1.7.0.9.txt @@ -0,0 +1,8 @@ +Git v1.7.0.9 Release Notes +========================== + +Fixes since v1.7.0.8 +-------------------- + + * "gitweb" can sometimes be tricked into parrotting a filename argument + given in a request without properly quoting. diff --git a/Documentation/RelNotes/1.7.0.txt b/Documentation/RelNotes/1.7.0.txt new file mode 100644 index 0000000..0bb8c0b --- /dev/null +++ b/Documentation/RelNotes/1.7.0.txt @@ -0,0 +1,214 @@ +Git v1.7.0 Release Notes +======================== + +Notes on behaviour change +------------------------- + + * "git push" into a branch that is currently checked out (i.e. pointed at by + HEAD in a repository that is not bare) is refused by default. + + Similarly, "git push $there :$killed" to delete the branch $killed + in a remote repository $there, when $killed branch is the current + branch pointed at by its HEAD, will be refused by default. + + Setting the configuration variables receive.denyCurrentBranch and + receive.denyDeleteCurrent to 'ignore' in the receiving repository + can be used to override these safety features. + + * "git send-email" does not make deep threads by default when sending a + patch series with more than two messages. All messages will be sent + as a reply to the first message, i.e. cover letter. + + It has been possible already to configure send-email to send "shallow thread" + by setting sendemail.chainreplyto configuration variable to false. The + only thing this release does is to change the default when you haven't + configured that variable. + + * "git status" is not "git commit --dry-run" anymore. This change does + not affect you if you run the command without argument. + + * "git diff" traditionally treated various "ignore whitespace" options + only as a way to filter the patch output. "git diff --exit-code -b" + exited with non-zero status even if all changes were about changing the + amount of whitespace and nothing else; and "git diff -b" showed the + "diff --git" header line for such a change without patch text. + + In this release, the "ignore whitespaces" options affect the semantics + of the diff operation. A change that does not affect anything but + whitespaces is reported with zero exit status when run with + --exit-code, and there is no "diff --git" header for such a change. + + * External diff and textconv helpers are now executed using the shell. + This makes them consistent with other programs executed by git, and + allows you to pass command-line parameters to the helpers. Any helper + paths containing spaces or other metacharacters now need to be + shell-quoted. The affected helpers are GIT_EXTERNAL_DIFF in the + environment, and diff.*.command and diff.*.textconv in the config + file. + + * The --max-pack-size argument to 'git repack', 'git pack-objects', and + 'git fast-import' was assuming the provided size to be expressed in MiB, + unlike the corresponding config variable and other similar options accepting + a size value. It is now expecting a size expressed in bytes, with a possible + unit suffix of 'k', 'm', or 'g'. + +Updates since v1.6.6 +-------------------- + +(subsystems) + + * "git fast-import" updates; adds "option" and "feature" to detect the + mismatch between fast-import and the frontends that produce the input + stream. + + * "git svn" support of subversion "merge tickets" and miscellaneous fixes. + + * "gitk" and "git gui" translation updates. + + * "gitweb" updates (code clean-up, load checking etc.) + +(portability) + + * Some more MSVC portability patches for msysgit port. + + * Minimum Pthreads emulation for msysgit port. + +(performance) + + * More performance improvement patches for msysgit port. + +(usability, bells and whistles) + + * More commands learned "--quiet" and "--[no-]progress" options. + + * Various commands given by the end user (e.g. diff.type.textconv, + and GIT_EDITOR) can be specified with command line arguments. E.g. it + is now possible to say "[diff "utf8doc"] textconv = nkf -w". + + * "sparse checkout" feature allows only part of the work tree to be + checked out. + + * HTTP transfer can use authentication scheme other than basic + (i.e./e.g. digest). + + * Switching from a version of superproject that used to have a submodule + to another version of superproject that no longer has it did not remove + the submodule directory when it should (namely, when you are not + interested in the submodule at all and didn't clone/checkout). + + * A new attribute conflict-marker-size can be used to change the size of + the conflict markers from the default 7; this is useful when tracked + contents (e.g. git-merge documentation) have strings that resemble the + conflict markers. + + * A new syntax "<branch>@{upstream}" can be used on the command line to + substitute the name of the "upstream" of the branch. Missing branch + defaults to the current branch, so "git fetch && git merge @{upstream}" + will be equivalent to "git pull". + + * "git am --resolved" has a synonym "git am --continue". + + * "git branch --set-upstream" can be used to update the (surprise!) upstream, + i.e. where the branch is supposed to pull and merge from (or rebase onto). + + * "git checkout A...B" is a way to detach HEAD at the merge base between + A and B. + + * "git checkout -m path" to reset the work tree file back into the + conflicted state works even when you already ran "git add path" and + resolved the conflicts. + + * "git commit --date='<date>'" can be used to override the author date + just like "git commit --author='<name> <email>'" can be used to + override the author identity. + + * "git commit --no-status" can be used to omit the listing of the index + and the work tree status in the editor used to prepare the log message. + + * "git commit" warns a bit more aggressively until you configure user.email, + whose default value almost always is not (and fundamentally cannot be) + what you want. + + * "git difftool" has been extended to make it easier to integrate it + with gitk. + + * "git fetch --all" can now be used in place of "git remote update". + + * "git grep" does not rely on external grep anymore. It can use more than + one thread to accelerate the operation. + + * "git grep" learned "--quiet" option. + + * "git log" and friends learned "--glob=heads/*" syntax that is a more + flexible way to complement "--branches/--tags/--remotes". + + * "git merge" learned to pass options specific to strategy-backends. E.g. + + - "git merge -Xsubtree=path/to/directory" can be used to tell the subtree + strategy how much to shift the trees explicitly. + + - "git merge -Xtheirs" can be used to auto-merge as much as possible, + while discarding your own changes and taking merged version in + conflicted regions. + + * "git push" learned "git push origin --delete branch", a syntactic sugar + for "git push origin :branch". + + * "git push" learned "git push --set-upstream origin forker:forkee" that + lets you configure your "forker" branch to later pull from "forkee" + branch at "origin". + + * "git rebase --onto A...B" means the history is replayed on top of the + merge base between A and B. + + * "git rebase -i" learned new action "fixup" that squashes the change + but does not affect existing log message. + + * "git rebase -i" also learned --autosquash option that is useful + together with the new "fixup" action. + + * "git remote" learned set-url subcommand that updates (surprise!) url + for an existing remote nickname. + + * "git rerere" learned "forget path" subcommand. Together with "git + checkout -m path" it will be useful when you recorded a wrong + resolution. + + * Use of "git reset --merge" has become easier when resetting away a + conflicted mess left in the work tree. + + * "git rerere" had rerere.autoupdate configuration but there was no way + to countermand it from the command line; --no-rerere-autoupdate option + given to "merge", "revert", etc. fixes this. + + * "git status" learned "-s(hort)" output format. + +(developers) + + * The infrastructure to build foreign SCM interface has been updated. + + * Many more commands are now built-in. + + * THREADED_DELTA_SEARCH is no more. If you build with threads, delta + compression will always take advantage of it. + +Fixes since v1.6.6 +------------------ + +All of the fixes in v1.6.6.X maintenance series are included in this +release, unless otherwise noted. + + * "git branch -d branch" used to refuse deleting the branch even when + the branch is fully merged to its upstream branch if it is not merged + to the current branch. It now deletes it in such a case. + + * "filter-branch" command incorrectly said --prune-empty and --filter-commit + were incompatible; the latter should be read as --commit-filter. + + * When using "git status" or asking "git diff" to compare the work tree + with something, they used to consider that a checked-out submodule with + uncommitted changes is not modified; this could cause people to forget + committing these changes in the submodule before committing in the + superproject. They now consider such a change as a modification and + "git diff" will append a "-dirty" to the work tree side when generating + patch output or when used with the --submodule option. diff --git a/Documentation/RelNotes/1.7.1.1.txt b/Documentation/RelNotes/1.7.1.1.txt new file mode 100644 index 0000000..3f6b314 --- /dev/null +++ b/Documentation/RelNotes/1.7.1.1.txt @@ -0,0 +1,96 @@ +Git v1.7.1.1 Release Notes +========================== + +Fixes since v1.7.1 +------------------ + + * Authentication over http transport can now be made lazily, in that the + request can first go to a URL without username, get a 401 response and + then the client will ask for the username to use. + + * We used to mistakenly think "../work" is a subdirectory of the current + directory when we are in "../work-xyz". + + * The attribute mechanism now allows an entry that uses an attribute + macro that set/unset one attribute, immediately followed by an + overriding setting; this makes attribute macros much easier to use. + + * We didn't recognize timezone "Z" as a synonym for "UTC" (75b37e70). + + * In 1.7.0, read-tree and user commands that use the mechanism such as + checkout and merge were fixed to handle switching between branches one + of which has a file while the other has a directory at the same path + correctly even when there are some "confusing" pathnames in them. But + the algorithm used for this fix was suboptimal and had a terrible + performance degradation especially in larger trees. + + * "git am -3" did not show diagnosis when the patch in the message was corrupt. + + * After "git apply --whitespace=fix" removed trailing blank lines in an + patch in a patch series, it failed to apply later patches that depend + on the presence of such blank lines. + + * "git bundle --stdin" segfaulted. + + * "git checkout" and "git rebase" overwrote paths that are marked "assume + unchanged". + + * "git commit --amend" on a commit with an invalid author-name line that + lacks the display name didn't work. + + * "git describe" did not tie-break tags that point at the same commit + correctly; newer ones are preferred by paying attention to the + tagger date now. + + * "git diff" used to tell underlying xdiff machinery to work very hard to + minimize the output, but this often was spending too many extra cycles + for very little gain. + + * "git diff --color" did not paint extended diff headers per line + (i.e. the coloring escape sequence didn't end at the end of line), + which confused "less -R". + + * "git fetch" over HTTP verifies the downloaded packfiles more robustly. + + * The memory usage by "git index-pack" (run during "git fetch" and "git + push") got leaner. + + * "GIT_DIR=foo.git git init --bare bar.git" created foo.git instead of bar.git. + + * "git log --abbrev=$num --format='%h' ignored --abbrev=$num. + + * "git ls-files ../out/side/cwd" refused to work. + + * "git merge --log" used to replace the custom message given by "-m" with + the shortlog, instead of appending to it. + + * "git notes copy" without any other argument segfaulted. + + * "git pull" accepted "--dry-run", gave it to underlying "git fetch" but + ignored the option itself, resulting in a bogus attempt to merge + unrelated commit. + + * "git rebase" did not faithfully reproduce a malformed author ident, that + is often seen in a repository converted from foreign SCMs. + + * "git reset --hard" started from a wrong directory and a working tree in + a nonstandard location is in use got confused. + + * "git send-email" lacked a way to specify the domainname used in the + EHLO/HELO exchange, causing rejected connection from picky servers. + It learned --smtp-domain option to solve this issue. + + * "git send-email" did not declare a content-transfer-encoding and + content-type even when its payload needs to be sent in 8-bit. + + * "git show -C -C" and other corner cases lost diff metainfo output + in 1.7.0. + + * "git stash" incorrectly lost paths in the working tree that were + previously removed from the index. + + * "git status" stopped refreshing the index by mistake in 1.7.1. + + * "git status" showed excess "hints" even when advice.statusHints is set to false. + +And other minor fixes and documentation updates. diff --git a/Documentation/RelNotes/1.7.1.2.txt b/Documentation/RelNotes/1.7.1.2.txt new file mode 100644 index 0000000..61ba14e --- /dev/null +++ b/Documentation/RelNotes/1.7.1.2.txt @@ -0,0 +1,28 @@ +Git v1.7.1.2 Release Notes +========================== + +Fixes since v1.7.1.1 +-------------------- + + * "git commit" did not honor GIT_REFLOG_ACTION environment variable, resulting + reflog messages for cherry-pick and revert actions to be recorded as "commit". + + * "git clone/fetch/pull" issued an incorrect error message when a ref and + a symref that points to the ref were updated at the same time. This + obviously would update them to the same value, and should not result in + an error condition. + + * "git diff" inside a tree with many pathnames that have certain + characters has become very slow in 1.7.0 by mistake. + + * "git rev-parse --parseopt --stop-at-non-option" did not stop at non option + when --keep-dashdash was in effect. + + * An overlong line after ".gitdir: " in a git file caused out of bounds + access to an array on the stack. + + * "git config --path conf.var" to attempt to expand a variable conf.var + that uses "~/" short-hand segfaulted when $HOME environment variable + was not set. + +And other minor fixes and documentation updates. diff --git a/Documentation/RelNotes/1.7.1.3.txt b/Documentation/RelNotes/1.7.1.3.txt new file mode 100644 index 0000000..5b18518 --- /dev/null +++ b/Documentation/RelNotes/1.7.1.3.txt @@ -0,0 +1,10 @@ +Git v1.7.1.3 Release Notes +========================== + +This is primarily to backport support for the new "add.ignoreErrors" +name given to the existing "add.ignore-errors" configuration variable. + +The next version, Git 1.7.4, and future versions, will support both +old and incorrect name and the new corrected name, but without this +backport, users who want to use the new name "add.ignoreErrors" in +their repositories cannot use older versions of Git. diff --git a/Documentation/RelNotes/1.7.1.4.txt b/Documentation/RelNotes/1.7.1.4.txt new file mode 100644 index 0000000..7c734b4 --- /dev/null +++ b/Documentation/RelNotes/1.7.1.4.txt @@ -0,0 +1,8 @@ +Git v1.7.1.4 Release Notes +========================== + +Fixes since v1.7.1.3 +-------------------- + + * "gitweb" can sometimes be tricked into parrotting a filename argument + given in a request without properly quoting. diff --git a/Documentation/RelNotes/1.7.1.txt b/Documentation/RelNotes/1.7.1.txt new file mode 100644 index 0000000..9d89fed --- /dev/null +++ b/Documentation/RelNotes/1.7.1.txt @@ -0,0 +1,89 @@ +Git v1.7.1 Release Notes +======================== + +Updates since v1.7.0 +-------------------- + + * Eric Raymond is the maintainer of updated CIAbot scripts, in contrib/. + + * gitk updates. + + * Some commands (e.g. svn and http interfaces) that interactively ask + for a password can be told to use an external program given via + GIT_ASKPASS. + + * Conflict markers that lead the common ancestor in diff3-style output + now have a label, which hopefully would help third-party tools that + expect one. + + * Comes with an updated bash-completion script. + + * "git am" learned "--keep-cr" option to handle inputs that are + a mixture of changes to files with and without CRLF line endings. + + * "git cvsimport" learned -R option to leave revision mapping between + CVS revisions and resulting git commits. + + * "git diff --submodule" notices and describes dirty submodules. + + * "git for-each-ref" learned %(symref), %(symref:short) and %(flag) + tokens. + + * "git hash-object --stdin-paths" can take "--no-filters" option now. + + * "git init" can be told to look at init.templatedir configuration + variable (obviously that has to come from either /etc/gitconfig or + $HOME/.gitconfig). + + * "git grep" learned "--no-index" option, to search inside contents that + are not managed by git. + + * "git grep" learned --color=auto/always/never. + + * "git grep" learned to paint filename and line-number in colors. + + * "git log -p --first-parent -m" shows one-parent diff for merge + commits, instead of showing combined diff. + + * "git merge-file" learned to use custom conflict marker size and also + to use the "union merge" behaviour. + + * "git notes" command has been rewritten in C and learned many commands + and features to help you carry notes forward across rebases and amends. + + * "git request-pull" identifies the commit the request is relative to in + a more readable way. + + * "git reset" learned "--keep" option that lets you discard commits + near the tip while preserving your local changes in a way similar + to how "git checkout branch" does. + + * "git status" notices and describes dirty submodules. + + * "git svn" should work better when interacting with repositories + with CRLF line endings. + + * "git imap-send" learned to support CRAM-MD5 authentication. + + * "gitweb" installation procedure can use "minified" js/css files + better. + + * Various documentation updates. + +Fixes since v1.7.0 +------------------ + +All of the fixes in v1.7.0.X maintenance series are included in this +release, unless otherwise noted. + + * "git add frotz/nitfol" did not complain when the entire frotz/ directory + was ignored. + + * "git diff --stat" used "int" to count the size of differences, + which could result in overflowing. + + * "git rev-list --pretty=oneline" didn't terminate a record with LF for + commits without any message. + + * "git rev-list --abbrev-commit" defaulted to 40-byte abbreviations, unlike + newer tools in the git toolset. diff --git a/Documentation/RelNotes/1.7.10.1.txt b/Documentation/RelNotes/1.7.10.1.txt new file mode 100644 index 0000000..be68524 --- /dev/null +++ b/Documentation/RelNotes/1.7.10.1.txt @@ -0,0 +1,78 @@ +Git v1.7.10.1 Release Notes +=========================== + +Additions since v1.7.10 +----------------------- + +Localization message files for Danish and German have been added. + + +Fixes since v1.7.10 +------------------- + + * "git add -p" is not designed to deal with unmerged paths but did + not exclude them and tried to apply funny patches only to fail. + + * "git blame" started missing quite a few changes from the origin + since we stopped using the diff minimization by default in v1.7.2 + era. + + * When PATH contains an unreadable directory, alias expansion code + did not kick in, and failed with an error that said "git-subcmd" + was not found. + + * "git clean -d -f" (not "-d -f -f") is supposed to protect nested + working trees of independent git repositories that exist in the + current project working tree from getting removed, but the + protection applied only to such working trees that are at the + top-level of the current project by mistake. + + * "git commit --author=$name" did not tell the name that was being + recorded in the resulting commit to hooks, even though it does do + so when the end user overrode the authorship via the + "GIT_AUTHOR_NAME" environment variable. + + * When "git commit --template F" errors out because the user did not + touch the message, it claimed that it aborts due to "empty + message", which was utterly wrong. + + * The regexp configured with diff.wordregex was incorrectly reused + across files. + + * An age-old corner case bug in combine diff (only triggered with -U0 + and the hunk at the beginning of the file needs to be shown) has + been fixed. + + * Rename detection logic used to match two empty files as renames + during merge-recursive, leading to unnatural mismerges. + + * The parser in "fast-import" did not diagnose ":9" style references + that is not followed by required SP/LF as an error. + + * When "git fetch" encounters repositories with too many references, + the command line of "fetch-pack" that is run by a helper + e.g. remote-curl, may fail to hold all of them. Now such an + internal invocation can feed the references through the standard + input of "fetch-pack". + + * "git fetch" that recurses into submodules on demand did not check + if it needs to go into submodules when non branches (most notably, + tags) are fetched. + + * "log -p --graph" used with "--stat" had a few formatting error. + + * Running "notes merge --commit" failed to perform correctly when run + from any directory inside $GIT_DIR/. When "notes merge" stops with + conflicts, $GIT_DIR/NOTES_MERGE_WORKTREE is the place a user edits + to resolve it. + + * The 'push to upstream' implementation was broken in some corner + cases. "git push $there" without refspec, when the current branch + is set to push to a remote different from $there, used to push to + $there using the upstream information to a remote unreleated to + $there. + + * Giving "--continue" to a conflicted "rebase -i" session skipped a + commit that only results in changes to submodules. + +Also contains minor fixes and documentation updates. diff --git a/Documentation/RelNotes/1.7.10.2.txt b/Documentation/RelNotes/1.7.10.2.txt new file mode 100644 index 0000000..7a7e9d6 --- /dev/null +++ b/Documentation/RelNotes/1.7.10.2.txt @@ -0,0 +1,85 @@ +Git v1.7.10.2 Release Notes +=========================== + +Fixes since v1.7.10.1 +--------------------- + + * The test scaffolding for git-daemon was flaky. + + * The test scaffolding for fast-import was flaky. + + * The filesystem boundary was not correctly reported when .git directory + discovery stopped at a mount point. + + * HTTP transport that requires authentication did not work correctly when + multiple connections are used simultaneously. + + * Minor memory leak during unpack_trees (hence "merge" and "checkout" + to check out another branch) has been plugged. + + * In the older days, the header "Conflicts:" in "cherry-pick" and "merge" + was separated by a blank line from the list of paths that follow for + readability, but when "merge" was rewritten in C, we lost it by + mistake. Remove the newline from "cherry-pick" to make them match + again. + + * The command line parser choked "git cherry-pick $name" when $name can + be both revision name and a pathname, even though $name can never be a + path in the context of the command. + + * The "include.path" facility in the configuration mechanism added in + 1.7.10 forgot to interpret "~/path" and "~user/path" as it should. + + * "git config --rename-section" to rename an existing section into a + bogus one did not check the new name. + + * The "diff --no-index" codepath used limited-length buffers, risking + pathnames getting truncated. Update it to use the strbuf API. + + * The report from "git fetch" said "new branch" even for a non branch + ref. + + * The http-backend (the server side of the smart http transfer) used + to overwrite GIT_COMMITTER_NAME and GIT_COMMITTER_EMAIL with the + value obtained from REMOTE_USER unconditionally, making it + impossible for the server side site-specific customization to use + different identity sources to affect the names logged. It now uses + REMOTE_USER only as a fallback value. + + * "log --graph" was not very friendly with "--stat" option and its + output had line breaks at wrong places. + + * Octopus merge strategy did not reduce heads that are recorded in the + final commit correctly. + + * "git push" over smart-http lost progress output a few releases ago; + this release resurrects it. + + * The error and advice messages given by "git push" when it fails due + to non-ff were not very helpful to new users; it has been broken + into three cases, and each is given a separate advice message. + + * The insn sheet given by "rebase -i" did not make it clear that the + insn lines can be re-ordered to affect the order of the commits in + the resulting history. + + * "git repack" used to write out unreachable objects as loose objects + when repacking, even if such loose objects will immediately pruned + due to its age. + + * A contrib script "rerere-train" did not work out of the box unless + user futzed with her $PATH. + + * "git rev-parse --show-prefix" used to emit nothing when run at the + top-level of the working tree, but now it gives a blank line. + + * The i18n of error message "git stash save" was not properly done. + + * "git submodule" used a sed script that some platforms mishandled. + + * When using a Perl script on a system where "perl" found on user's + $PATH could be ancient or otherwise broken, we allow builders to + specify the path to a good copy of Perl with $PERL_PATH. The + gitweb test forgot to use that Perl when running its test. + +Also contains minor fixes and documentation updates. diff --git a/Documentation/RelNotes/1.7.10.3.txt b/Documentation/RelNotes/1.7.10.3.txt new file mode 100644 index 0000000..703fbf1 --- /dev/null +++ b/Documentation/RelNotes/1.7.10.3.txt @@ -0,0 +1,43 @@ +Git v1.7.10.3 Release Notes +=========================== + +Fixes since v1.7.10.2 +--------------------- + + * The message file for German translation has been updated a bit. + + * Running "git checkout" on an unborn branch used to corrupt HEAD. + + * When checking out another commit from an already detached state, we + used to report all commits that are not reachable from any of the + refs as lossage, but some of them might be reachable from the new + HEAD, and there is no need to warn about them. + + * Some time ago, "git clone" lost the progress output for its + "checkout" phase; when run without any "--quiet" option, it should + give progress to the lengthy operation. + + * The directory path used in "git diff --no-index", when it recurses + down, was broken with a recent update after v1.7.10.1 release. + + * "log -z --pretty=tformat:..." did not terminate each record with + NUL. The fix is not entirely correct when the output also asks for + --patch and/or --stat, though. + + * The DWIM behaviour for "log --pretty=format:%gd -g" was somewhat + broken and gave undue precedence to configured log.date, causing + "git stash list" to show "stash@{time stamp string}". + + * "git status --porcelain" ignored "--branch" option by mistake. The + output for "git status --branch -z" was also incorrect and did not + terminate the record for the current branch name with NUL as asked. + + * When a submodule repository uses alternate object store mechanism, + some commands that were started from the superproject did not + notice it and failed with "No such object" errors. The subcommands + of "git submodule" command that recursed into the submodule in a + separate process were OK; only the ones that cheated and peeked + directly into the submodule's repository from the primary process + were affected. + +Also contains minor fixes and documentation updates. diff --git a/Documentation/RelNotes/1.7.10.4.txt b/Documentation/RelNotes/1.7.10.4.txt new file mode 100644 index 0000000..326670d --- /dev/null +++ b/Documentation/RelNotes/1.7.10.4.txt @@ -0,0 +1,29 @@ +Git v1.7.10.4 Release Notes +=========================== + +Fixes since v1.7.10.3 +--------------------- + + * The message file for Swedish translation has been updated a bit. + + * A name taken from mailmap was copied into an internal buffer + incorrectly and could overun the buffer if it is too long. + + * A malformed commit object that has a header line chomped in the + middle could kill git with a NULL pointer dereference. + + * An author/committer name that is a single character was mishandled + as an invalid name by mistake. + + * The progress indicator for a large "git checkout" was sent to + stderr even if it is not a terminal. + + * "git grep -e '$pattern'", unlike the case where the patterns are + read from a file, did not treat individual lines in the given + pattern argument as separate regular expressions as it should. + + * When "git rebase" was given a bad commit to replay the history on, + its error message did not correctly give the command line argument + it had trouble parsing. + +Also contains minor fixes and documentation updates. diff --git a/Documentation/RelNotes/1.7.10.5.txt b/Documentation/RelNotes/1.7.10.5.txt new file mode 100644 index 0000000..4db1770 --- /dev/null +++ b/Documentation/RelNotes/1.7.10.5.txt @@ -0,0 +1,12 @@ +Git v1.7.10.5 Release Notes +=========================== + +Fixes since v1.7.10.4 +--------------------- + + * "git fast-export" did not give a readable error message when the + same mark erroneously appeared twice in the --import-marks input. + + * "git rebase -p" used to pay attention to rebase.autosquash which + was wrong. "git rebase -p -i" should, but "git rebase -p" by + itself should not. diff --git a/Documentation/RelNotes/1.7.10.txt b/Documentation/RelNotes/1.7.10.txt new file mode 100644 index 0000000..58100bf --- /dev/null +++ b/Documentation/RelNotes/1.7.10.txt @@ -0,0 +1,219 @@ +Git v1.7.10 Release Notes +========================= + +Compatibility Notes +------------------- + + * From this release on, the "git merge" command in an interactive + session will start an editor when it automatically resolves the + merge for the user to explain the resulting commit, just like the + "git commit" command does when it wasn't given a commit message. + + If you have a script that runs "git merge" and keeps its standard + input and output attached to the user's terminal, and if you do not + want the user to explain the resulting merge commits, you can + export GIT_MERGE_AUTOEDIT environment variable set to "no", like + this: + + #!/bin/sh + GIT_MERGE_AUTOEDIT=no + export GIT_MERGE_AUTOEDIT + + to disable this behavior (if you want your users to explain their + merge commits, you do not have to do anything). Alternatively, you + can give the "--no-edit" option to individual invocations of the + "git merge" command if you know everybody who uses your script has + Git v1.7.8 or newer. + + * The "--binary/-b" options to "git am" have been a no-op for quite a + while and were deprecated in mid 2008 (v1.6.0). When you give these + options to "git am", it will now warn and ask you not to use them. + + * When you do not tell which branches and tags to push to the "git + push" command in any way, the command used "matching refs" rule to + update remote branches and tags with branches and tags with the + same name you locally have. In future versions of Git, this will + change to push out only your current branch according to either the + "upstream" or the "current" rule. Although "upstream" may be more + powerful once the user understands Git better, the semantics + "current" gives is simpler and easier to understand for beginners + and may be a safer and better default option. We haven't decided + yet which one to switch to. + + +Updates since v1.7.9 +-------------------- + +UI, Workflows & Features + + * various "gitk" updates. + - show the path to the top level directory in the window title + - update preference edit dialog + - display file list correctly when directories are given on command line + - make "git-describe" output in the log message into a clickable link + - avoid matching the UNIX timestamp part when searching all fields + - give preference to symbolic font names like sans & monospace + - allow comparing two commits using a mark + - "gitk" honors log.showroot configuration. + + * Teams for localizing the messages from the Porcelain layer of + commands are starting to form, thanks to Jiang Xin who volunteered + to be the localization coordinator. Translated messages for + simplified Chinese, Swedish and Portuguese are available. + + * The configuration mechanism learned an "include" facility; an + assignment to the include.path pseudo-variable causes the named + file to be included in-place when Git looks up configuration + variables. + + * A content filter (clean/smudge) used to be just a way to make the + recorded contents "more useful", and allowed to fail; a filter can + now optionally be marked as "required". + + * Options whose names begin with "--no-" (e.g. the "--no-verify" + option of the "git commit" command) can be negated by omitting + "no-" from its name, e.g. "git commit --verify". + + * "git am" learned to pass "-b" option to underlying "git mailinfo", so + that a bracketed string other than "PATCH" at the beginning can be kept. + + * "git clone" learned "--single-branch" option to limit cloning to a + single branch (surprise!); tags that do not point into the history + of the branch are not fetched. + + * "git clone" learned to detach the HEAD in the resulting repository + when the user specifies a tag with "--branch" (e.g., "--branch=v1.0"). + Clone also learned to print the usual "detached HEAD" advice in such + a case, similar to "git checkout v1.0". + + * When showing a patch while ignoring whitespace changes, the context + lines are taken from the postimage, in order to make it easier to + view the output. + + * "git diff --stat" learned to adjust the width of the output on + wider terminals, and give more columns to pathnames as needed. + + * "diff-highlight" filter (in contrib/) was updated to produce more + aesthetically pleasing output. + + * "fsck" learned "--no-dangling" option to omit dangling object + information. + + * "git log -G" and "git log -S" learned to pay attention to the "-i" + option. With "-i", "log -G" ignores the case when finding patch + hunks that introduce or remove a string that matches the given + pattern. Similarly with "-i", "log -S" ignores the case when + finding the commit the given block of text appears or disappears + from the file. + + * "git merge" in an interactive session learned to spawn the editor + by default to let the user edit the auto-generated merge message, + to encourage people to explain their merges better. Legacy scripts + can export GIT_MERGE_AUTOEDIT=no to retain the historical behavior. + Both "git merge" and "git pull" can be given --no-edit from the + command line to accept the auto-generated merge message. + + * The advice message given when the user didn't give enough clue on + what to merge to "git pull" and "git merge" has been updated to + be more concise and easier to understand. + + * "git push" learned the "--prune" option, similar to "git fetch". + + * The whole directory that houses a top-level superproject managed by + "git submodule" can be moved to another place. + + * "git symbolic-ref" learned the "--short" option to abbreviate the + refname it shows unambiguously. + + * "git tag --list" can be given "--points-at <object>" to limit its + output to those that point at the given object. + + * "gitweb" allows intermediate entries in the directory hierarchy + that leads to a project to be clicked, which in turn shows the + list of projects inside that directory. + + * "gitweb" learned to read various pieces of information for the + repositories lazily, instead of reading everything that could be + needed (including the ones that are not necessary for a specific + task). + + * Project search in "gitweb" shows the substring that matched in the + project name and description highlighted. + + * HTTP transport learned to authenticate with a proxy if needed. + + * A new script "diffall" is added to contrib/; it drives an + external tool to perform a directory diff of two Git revisions + in one go, unlike "difftool" that compares one file at a time. + +Foreign Interface + + * Improved handling of views, labels and branches in "git-p4" (in contrib). + + * "git-p4" (in contrib) suffered from unnecessary merge conflicts when + p4 expanded the embedded $RCS$-like keywords; it can be now told to + unexpand them. + + * Some "git-svn" updates. + + * "vcs-svn"/"svn-fe" learned to read dumps with svn-deltas and + support incremental imports. + + * "git difftool/mergetool" learned to drive DeltaWalker. + +Performance + + * Unnecessary calls to parse_object() "git upload-pack" makes in + response to "git fetch", have been eliminated, to help performance + in repositories with excessive number of refs. + +Internal Implementation (please report possible regressions) + + * Recursive call chains in "git index-pack" to deal with long delta + chains have been flattened, to reduce the stack footprint. + + * Use of add_extra_ref() API is now gone, to make it possible to + cleanly restructure the overall refs API. + + * The command line parser of "git pack-objects" now uses parse-options + API. + + * The test suite supports the new "test_pause" helper function. + + * Parallel to the test suite, there is a beginning of performance + benchmarking framework. + + * t/Makefile is adjusted to prevent newer versions of GNU make from + running tests in seemingly random order. + + * The code to check if a path points at a file beyond a symbolic link + has been restructured to be thread-safe. + + * When pruning directories that has become empty during "git prune" + and "git prune-packed", call closedir() that iterates over a + directory before rmdir() it. + +Also contains minor documentation updates and code clean-ups. + + +Fixes since v1.7.9 +------------------ + +Unless otherwise noted, all the fixes since v1.7.9 in the maintenance +releases are contained in this release (see release notes to them for +details). + + * Build with NO_PERL_MAKEMAKER was broken and Git::I18N did not work + with versions of Perl older than 5.8.3. + (merge 5eb660e ab/perl-i18n later to maint). + + * "git tag -s" honored "gpg.program" configuration variable since + 1.7.9, but "git tag -v" and "git verify-tag" didn't. + (merge a2c2506 az/verify-tag-use-gpg-config later to maint). + + * "configure" script learned to take "--with-sane-tool-path" from the + command line to record SANE_TOOL_PATH (used to avoid broken platform + tools in /usr/bin) in config.mak.autogen. This may be useful for + people on Solaris who have saner tools outside /usr/xpg[46]/bin. + + * zsh port of bash completion script needed another workaround. diff --git a/Documentation/RelNotes/1.7.11.1.txt b/Documentation/RelNotes/1.7.11.1.txt new file mode 100644 index 0000000..577ecca --- /dev/null +++ b/Documentation/RelNotes/1.7.11.1.txt @@ -0,0 +1,9 @@ +Git v1.7.11.1 Release Notes +=========================== + +Fixes since v1.7.11 +------------------- + + * The cross links in the HTML version of manual pages were broken. + +Also contains minor typofixes and documentation updates. diff --git a/Documentation/RelNotes/1.7.11.2.txt b/Documentation/RelNotes/1.7.11.2.txt new file mode 100644 index 0000000..f0cfd02 --- /dev/null +++ b/Documentation/RelNotes/1.7.11.2.txt @@ -0,0 +1,53 @@ +Git v1.7.11.2 Release Notes +=========================== + +Fixes since v1.7.11.1 +--------------------- + + * On Cygwin, the platform pread(2) is not thread safe, just like our + own compat/ emulation, and cannot be used in the index-pack + program. Makefile variable NO_THREAD_SAFE_PREAD can be defined to + avoid use of this function in a threaded program. + + * "git add" allows adding a regular file to the path where a + submodule used to exist, but "git update-index" does not allow an + equivalent operation to Porcelain writers. + + * "git archive" incorrectly computed the header checksum; the symptom + was observed only when using pathnames with hi-bit set. + + * "git blame" did not try to make sure that the abbreviated commit + object names in its output are unique. + + * Running "git bundle verify" on a bundle that records a complete + history said "it requires these 0 commits". + + * "git clone --single-branch" to clone a single branch did not limit + the cloning to the specified branch. + + * "git diff --no-index" did not correctly handle relative paths and + did not correctly give exit codes when run under "--quiet" option. + + * "git diff --no-index" did not work with pagers correctly. + + * "git diff COPYING HEAD:COPYING" gave a nonsense error message that + claimed that the tree-ish HEAD did not have COPYING in it. + + * When "git log" gets "--simplify-merges/by-decoration" together with + "--first-parent", the combination of these options makes the + simplification logic to use in-core commit objects that haven't + been examined for relevance, either producing incorrect result or + taking too long to produce any output. Teach the simplification + logic to ignore commits that the first-parent traversal logic + ignored when both are in effect to work around the issue. + + * "git ls-files --exclude=t -i" did not consider anything under t/ as + excluded, as it did not pay attention to exclusion of leading paths + while walking the index. Other two users of excluded() are also + updated. + + * "git request-pull $url dev" when the tip of "dev" branch was tagged + with "ext4-for-linus" used the contents from the tag in the output + but still asked the "dev" branch to be pulled, not the tag. + +Also contains minor typofixes and documentation updates. diff --git a/Documentation/RelNotes/1.7.11.3.txt b/Documentation/RelNotes/1.7.11.3.txt new file mode 100644 index 0000000..64494f8 --- /dev/null +++ b/Documentation/RelNotes/1.7.11.3.txt @@ -0,0 +1,53 @@ +Git v1.7.11.3 Release Notes +=========================== + +Fixes since v1.7.11.3 +--------------------- + + * The error message from "git push $there :bogo" (and its equivalent + "git push $there --delete bogo") mentioned that we tried and failed + to guess what ref is being deleted based on the LHS of the refspec, + which we don't. + + * A handful of files and directories we create had tighter than + necessary permission bits when the user wanted to have group + writability (e.g. by setting "umask 002"). + + * "commit --amend" used to refuse amending a commit with an empty log + message, with or without "--allow-empty-message". + + * "git commit --amend --only --" was meant to allow "Clever" people to + rewrite the commit message without making any change even when they + have already changes for the next commit added to their index, but + it never worked as advertised since it was introduced in 1.3.0 era. + + * Even though the index can record pathnames longer than 1<<12 bytes, + in some places we were not comparing them in full, potentially + replacing index entries instead of adding. + + * "git show"'s auto-walking behaviour was an unreliable and + unpredictable hack; it now behaves just like "git log" does when it + walks. + + * "git diff", "git status" and anything that internally uses the + comparison machinery was utterly broken when the difference + involved a file with "-" as its name. This was due to the way "git + diff --no-index" was incorrectly bolted on to the system, making + any comparison that involves a file "-" at the root level + incorrectly read from the standard input. + + * We did not have test to make sure "git rebase" without extra options + filters out an empty commit in the original history. + + * "git fast-export" produced an input stream for fast-import without + properly quoting pathnames when they contain SPs in them. + + * "git checkout --detach", when you are still on an unborn branch, + should be forbidden, but it wasn't. + + * Some implementations of Perl terminates "lines" with CRLF even when + the script is operating on just a sequence of bytes. Make sure to + use "$PERL_PATH", the version of Perl the user told Git to use, in + our tests to avoid unnecessary breakages in tests. + +Also contains minor typofixes and documentation updates. diff --git a/Documentation/RelNotes/1.7.11.4.txt b/Documentation/RelNotes/1.7.11.4.txt new file mode 100644 index 0000000..3a640c2 --- /dev/null +++ b/Documentation/RelNotes/1.7.11.4.txt @@ -0,0 +1,31 @@ +Git v1.7.11.4 Release Notes +=========================== + +Fixes since v1.7.11.3 +--------------------- + + * "$GIT_DIR/COMMIT_EDITMSG" file that is used to hold the commit log + message user edits was not documented. + + * The advise() function did not use varargs correctly to format + its message. + + * When "git am" failed, old timers knew to check .git/rebase-apply/patch + to see what went wrong, but we never told the users about it. + + * "git commit-tree" learned a more natural "-p <parent> <tree>" order + of arguments long time ago, but recently forgot it by mistake. + + * "git diff --no-ext-diff" did not output anything for a typechange + filepair when GIT_EXTERNAL_DIFF is in effect. + + * In 1.7.9 era, we taught "git rebase" about the raw timestamp format + but we did not teach the same trick to "filter-branch", which rolled + a similar logic on its own. + + * When "git submodule add" clones a submodule repository, it can get + confused where to store the resulting submodule repository in the + superproject's .git/ directory when there is a symbolic link in the + path to the current directory. + +Also contains minor typofixes and documentation updates. diff --git a/Documentation/RelNotes/1.7.11.5.txt b/Documentation/RelNotes/1.7.11.5.txt new file mode 100644 index 0000000..0a2ed85 --- /dev/null +++ b/Documentation/RelNotes/1.7.11.5.txt @@ -0,0 +1,36 @@ +Git v1.7.11.5 Release Notes +=========================== + +Fixes since v1.7.11.4 +--------------------- + + * The Makefile rule to create assembly output (primarily for + debugging purposes) did not create it next to the source. + + * The code to avoid mistaken attempt to add the object directory + itself as its own alternate could read beyond end of a string while + comparison. + + * On some architectures, "block-sha1" did not compile correctly + when compilers inferred alignment guarantees from our source we + did not intend to make. + + * When talking to a remote running ssh on IPv6 enabled host, whose + address is spelled as "[HOST]:PORT", we did not parse the address + correctly and failed to connect. + + * git-blame.el (in compat/) have been updated to use Elisp more + correctly. + + * "git checkout <branchname>" to come back from a detached HEAD state + incorrectly computed reachability of the detached HEAD, resulting + in unnecessary warnings. + + * "git mergetool" did not support --tool-help option to give the list + of supported backends, like "git difftool" does. + + * "git grep" stopped spawning an external "grep" long time ago, but a + duplicated test to check internal and external "grep" was left + behind. + +Also contains minor typofixes and documentation updates. diff --git a/Documentation/RelNotes/1.7.11.6.txt b/Documentation/RelNotes/1.7.11.6.txt new file mode 100644 index 0000000..ba7d3c3 --- /dev/null +++ b/Documentation/RelNotes/1.7.11.6.txt @@ -0,0 +1,84 @@ +Git v1.7.11.6 Release Notes +=========================== + +Fixes since v1.7.11.5 +--------------------- + + * "ciabot" script (in contrib/) has been updated with extensive + documentation. + + * "git foo" errored out with "Not a directory" when the user had a + non-directory on $PATH, and worse yet it masked an alias "foo" from + running. + + * When the user exports a non-default IFS without HT, scripts that + rely on being able to parse "ls-files -s | while read a b c..." + started to fail. Protect them from such a misconfiguration. + + * When the user gives an argument that can be taken as both a + revision name and a pathname without disambiguating with "--", we + used to give a help message "Use '--' to separate". The message + has been clarified to show where that '--' goes on the command + line. + + * Documentation for the configuration file format had a confusing + example. + + * Older parts of the documentation described as if having a regular + file in .git/refs/ hierarchy were the only way to have branches and + tags, which is not true for quite some time. + + * It was generally understood that "--long-option"s to many of our + subcommands can be abbreviated to the unique prefix, but it was not + easy to find it described for new readers of the documentation set. + + * The "--topo-order", "--date-order" (and the lack of either means + the default order) options to "rev-list" and "log" family of + commands were poorly described in the documentation. + + * "git commit --amend" let the user edit the log message and then + died when the human-readable committer name was given + insufficiently by getpwent(3). + + * The exit status code from "git config" was way overspecified while + being incorrect. The implementation has been updated to give the + documented status for a case that was documented, and introduce a + new code for "all other errors". + + * The output from "git diff -B" for a file that ends with an + incomplete line did not put "\ No newline..." on a line of its own. + + * "git diff" had a confusion between taking data from a path in the + working tree and taking data from an object that happens to have + name 0{40} recorded in a tree. + + * The "--rebase" option to "git pull" can be abbreviated to "-r", + but we didn't document it. + + * When "git push" triggered the automatic gc on the receiving end, a + message from "git prune" that said it was removing cruft leaked to + the standard output, breaking the communication protocol. + + * The reflog entries left by "git rebase" and "git rebase -i" were + inconsistent (the interactive one gave an abbreviated object name). + + * "git send-email" did not unquote encoded words that appear on the + header correctly, and lost "_" from strings. + + * "git stash apply/pop" did not trigger "rerere" upon conflicts + unlike other mergy operations. + + * "git submodule <cmd> path" did not error out when the path to the + submodule was misspelt. + + * "git submodule update -f" did not update paths in the working tree + that has local changes. + (merge 01d4721 sz/submodule-force-update later to maint). + + * "gitweb" when used with PATH_INFO failed to notice directories with + SP (and other characters that need URL-style quoting) in them. + + * Fallback 'getpass' implementation made unportable use of stdio API. + + * A utility shell function test_seq has been added as a replacement + for the 'seq' utility found on some platforms. diff --git a/Documentation/RelNotes/1.7.11.7.txt b/Documentation/RelNotes/1.7.11.7.txt new file mode 100644 index 0000000..e7e79d9 --- /dev/null +++ b/Documentation/RelNotes/1.7.11.7.txt @@ -0,0 +1,46 @@ +Git v1.7.11.7 Release Notes +=========================== + +Fixes since v1.7.11.6 +--------------------- + + * The synopsis said "checkout [-B branch]" to make it clear the + branch name is a parameter to the option, but the heading for the + option description was "-B::", not "-B branch::", making the + documentation misleading. + + * Git ships with a fall-back regexp implementation for platforms with + buggy regexp library, but it was easy for people to keep using their + platform regexp. A new test has been added to check this. + + * "git apply -p0" did not parse pathnames on "diff --git" line + correctly. This caused patches that had pathnames in no other + places to be mistakenly rejected (most notably, binary patch that + does not rename nor change mode). Textual patches, renames or mode + changes have preimage and postimage pathnames in different places + in a form that can be parsed unambiguously and did not suffer from + this problem. + + * After "gitk" showed the contents of a tag, neither "Reread + references" nor "Reload" did not update what is shown as the + contents of it, when the user overwrote the tag with "git tag -f". + + * "git for-each-ref" did not currectly support more than one --sort + option. + + * "git log .." errored out saying it is both rev range and a path + when there is no disambiguating "--" is on the command line. + Update the command line parser to interpret ".." as a path in such + a case. + + * Pushing to smart HTTP server with recent Git fails without having + the username in the URL to force authentication, if the server is + configured to allow GET anonymously, while requiring authentication + for POST. + + * "git show --format='%ci'" did not give timestamp correctly for + commits created without human readable name on "committer" line. + (merge e27ddb6 jc/maint-ident-missing-human-name later to maint). + + * "git show --quiet" ought to be a synonym for "git show -s", but + wasn't. diff --git a/Documentation/RelNotes/1.7.11.txt b/Documentation/RelNotes/1.7.11.txt new file mode 100644 index 0000000..15b954c --- /dev/null +++ b/Documentation/RelNotes/1.7.11.txt @@ -0,0 +1,139 @@ +Git v1.7.11 Release Notes +========================= + +Updates since v1.7.10 +--------------------- + +UI, Workflows & Features + + * A new mode for push, "simple", which is a cross between "current" + and "upstream", has been introduced. "git push" without any refspec + will push the current branch out to the same name at the remote + repository only when it is set to track the branch with the same + name over there. The plan is to make this mode the new default + value when push.default is not configured. + + * A couple of commands learned the "--column" option to produce + columnar output. + + * A third-party tool "git subtree" is distributed in contrib/ + + * A remote helper that acts as a proxy and caches ssl session for the + https:// transport is added to the contrib/ area. + + * Error messages given when @{u} is used for a branch without its + upstream configured have been clarified. + + * Even with the "-q"uiet option, "checkout" used to report setting up + tracking. Also "branch" learned the "-q"uiet option to squelch + informational message. + + * Your build platform may support hardlinks but you may prefer not to + use them, e.g. when installing to DESTDIR to make a tarball and + untarring on a filesystem that has poor support for hardlinks. + There is a Makefile option NO_INSTALL_HARDLINKS for you. + + * The smart-http backend used to always override GIT_COMMITTER_* + variables with REMOTE_USER and REMOTE_ADDR, but these variables are + now preserved when set. + + * "git am" learned the "--include" option, which is an opposite of + existing the "--exclude" option. + + * When "git am -3" needs to fall back to an application of the patch + to a synthesized preimage followed by a 3-way merge, the paths that + needed such treatment are now reported to the end user, so that the + result in them can be eyeballed with extra care. + + * The output from "diff/log --stat" used to always allocate 4 columns + to show the number of modified lines, but not anymore. + + * "git difftool" learned the "--dir-diff" option to spawn external + diff tools that can compare two directory hierarchies at a time + after populating two temporary directories, instead of running an + instance of the external tool once per a file pair. + + * The "fmt-merge-msg" command learned to list the primary contributors + involved in the side topic you are merging in a comment in the merge + commit template. + + * "git rebase" learned to optionally keep commits that do not + introduce any change in the original history. + + * "git push --recurse-submodules" learned to optionally look into the + histories of submodules bound to the superproject and push them + out. + + * A 'snapshot' request to "gitweb" honors If-Modified-Since: header, + based on the commit date. + + * "gitweb" learned to highlight the patch it outputs even more. + +Foreign Interface + + * "git svn" used to die with unwanted SIGPIPE when talking with an HTTP + server that uses keep-alive. + + * "git svn" learned to use platform specific authentication + providers, e.g. gnome-keyring, kwallet, etc. + + * "git p4" has been moved out of the contrib/ area and has seen more + work on importing labels as tags from (and exporting tags as labels + to) p4. + +Performance and Internal Implementation (please report possible regressions) + + * Bash completion script (in contrib/) have been cleaned up to make + future work on it simpler. + + * An experimental "version 4" format of the index file has been + introduced to reduce on-disk footprint and I/O overhead. + + * "git archive" learned to produce its output without reading the + blob object it writes out in memory in its entirety. + + * "git index-pack" that runs when fetching or pushing objects to + complete the packfile on the receiving end learned to use multiple + threads to do its job when available. + + * The code to compute hash values for lines used by the internal diff + engine was optimized on little-endian machines, using the same + trick the kernel folks came up with. + + * "git apply" had some memory leaks plugged. + + * Setting up a revision traversal with many starting points was + inefficient as these were placed in a date-order priority queue + one-by-one. Now they are collected in the queue unordered first, + and sorted immediately before getting used. + + * More lower-level commands learned to use the streaming API to read + from the object store without keeping everything in core. + + * The weighting parameters to suggestion command name typo have been + tweaked, so that "git tags" will suggest "tag?" and not "stage?". + + * Because "sh" on the user's PATH may be utterly broken on some + systems, run-command API now uses SHELL_PATH, not /bin/sh, when + spawning an external command (not applicable to Windows port). + + * The API to iterate over the refs/ hierarchy has been tweaked to + allow walking only a subset of it more efficiently. + +Also contains minor documentation updates and code clean-ups. + + +Fixes since v1.7.10 +------------------- + +Unless otherwise noted, all the fixes since v1.7.10 in the maintenance +releases are contained in this release (see release notes to them for +details). + + * "git submodule init" used to report "registered for path ..." + even for submodules that were registered earlier. + (cherry-pick c1c259e jl/submodule-report-new-path-once later to maint). + + * "git diff --stat" used to fully count a binary file with modified + execution bits whose contents is unmodified, which was not quite + right. diff --git a/Documentation/RelNotes/1.7.12.1.txt b/Documentation/RelNotes/1.7.12.1.txt new file mode 100644 index 0000000..b8f04af --- /dev/null +++ b/Documentation/RelNotes/1.7.12.1.txt @@ -0,0 +1,134 @@ +Git 1.7.12.1 Release Notes +========================== + +Fixes since v1.7.12 +------------------- + + * "git apply -p0" did not parse pathnames on "diff --git" line + correctly. This caused patches that had pathnames in no other + places to be mistakenly rejected (most notably, binary patch that + does not rename nor change mode). Textual patches, renames or mode + changes have preimage and postimage pathnames in different places + in a form that can be parsed unambiguously and did not suffer from + this problem. + + * "git cherry-pick A C B" used to replay changes in A and then B and + then C if these three commits had committer timestamps in that + order, which is not what the user who said "A C B" naturally + expects. + + * "git commit --amend" let the user edit the log message and then + died when the human-readable committer name was given + insufficiently by getpwent(3). + + * Some capabilities were asked by fetch-pack even when upload-pack + did not advertise that they are available. fetch-pack has been + fixed not to do so. + + * "git diff" had a confusion between taking data from a path in the + working tree and taking data from an object that happens to have + name 0{40} recorded in a tree. + + * "git for-each-ref" did not correctly support more than one --sort + option. + + * "git log .." errored out saying it is both rev range and a path + when there is no disambiguating "--" is on the command line. + Update the command line parser to interpret ".." as a path in such + a case. + + * The "--topo-order", "--date-order" (and the lack of either means + the default order) options to "rev-list" and "log" family of + commands were poorly described in the documentation. + + * "git prune" without "-v" used to warn about leftover temporary + files (which is an indication of an earlier aborted operation). + + * Pushing to smart HTTP server with recent Git fails without having + the username in the URL to force authentication, if the server is + configured to allow GET anonymously, while requiring authentication + for POST. + + * The reflog entries left by "git rebase" and "git rebase -i" were + inconsistent (the interactive one gave an abbreviated object name). + + * When "git push" triggered the automatic gc on the receiving end, a + message from "git prune" that said it was removing cruft leaked to + the standard output, breaking the communication protocol. + + * "git show --quiet" ought to be a synonym for "git show -s", but + wasn't. + + * "git show --format='%ci'" did not give timestamp correctly for + commits created without human readable name on "committer" line. + + * "git send-email" did not unquote encoded words that appear on the + header correctly, and lost "_" from strings. + + * The interactive prompt "git send-email" gives was error prone. It + asked "What e-mail address do you want to use?" with the address it + guessed (correctly) the user would want to use in its prompt, + tempting the user to say "y". But the response was taken as "No, + please use 'y' as the e-mail address instead", which is most + certainly not what the user meant. + + * "gitweb" when used with PATH_INFO failed to notice directories with + SP (and other characters that need URL-style quoting) in them. + + * When the user gives an argument that can be taken as both a + revision name and a pathname without disambiguating with "--", we + used to give a help message "Use '--' to separate". The message + has been clarified to show where that '--' goes on the command + line. + + * When the user exports a non-default IFS without HT, scripts that + rely on being able to parse "ls-files -s | while read a b c..." + started to fail. Protect them from such a misconfiguration. + + * The attribute system may be asked for a path that itself or its + leading directories no longer exists in the working tree, and it is + fine if we cannot open .gitattribute file in such a case. Failure + to open per-directory .gitattributes with error status other than + ENOENT and ENOTDIR should be diagnosed, but it wasn't. + + * After "gitk" showed the contents of a tag, neither "Reread + references" nor "Reload" did not update what is shown as the + contents of it, when the user overwrote the tag with "git tag -f". + + * "ciabot" script (in contrib/) has been updated with extensive + documentation. + + * "git-jump" script (in contrib/) did not work well when + diff.noprefix or diff.mnemonicprefix is in effect. + + * Older parts of the documentation described as if having a regular + file in .git/refs/ hierarchy were the only way to have branches and + tags, which is not true for quite some time. + + * A utility shell function test_seq has been added as a replacement + for the 'seq' utility found on some platforms. + + * Compatibility wrapper to learn the maximum number of file + descriptors we can open around sysconf(_SC_OPEN_MAX) and + getrlimit(RLIMIT_NO_FILE) has been introduced for portability. + + * We used curl_easy_strerror() without checking version of cURL, + breaking the build for versions before curl 7.12.0. + + * Code to work around MacOS X UTF-8 gotcha has been cleaned up. + + * Fallback 'getpass' implementation made unportable use of stdio API. + + * The "--rebase" option to "git pull" can be abbreviated to "-r", + but we didn't document it. + + * It was generally understood that "--long-option"s to many of our + subcommands can be abbreviated to the unique prefix, but it was not + easy to find it described for new readers of the documentation set. + + * The synopsis said "checkout [-B branch]" to make it clear the + branch name is a parameter to the option, but the heading for the + option description was "-B::", not "-B branch::", making the + documentation misleading. + +Also contains numerous documentation updates. diff --git a/Documentation/RelNotes/1.7.12.2.txt b/Documentation/RelNotes/1.7.12.2.txt new file mode 100644 index 0000000..6925574 --- /dev/null +++ b/Documentation/RelNotes/1.7.12.2.txt @@ -0,0 +1,40 @@ +Git 1.7.12.2 Release Notes +========================== + +Fixes since v1.7.12.1 +--------------------- + + * When "git am" is fed an input that has multiple "Content-type: ..." + header, it did not grok charset= attribute correctly. + + * Even during a conflicted merge, "git blame $path" always meant to + blame uncommitted changes to the "working tree" version; make it + more useful by showing cleanly merged parts as coming from the other + branch that is being merged. + + * "git blame MAKEFILE" run in a history that has "Makefile" but not + "MAKEFILE" should say "No such file MAKEFILE in HEAD", but got + confused on a case insensitive filesystem and failed to do so. + + * "git fetch --all", when passed "--no-tags", did not honor the + "--no-tags" option while fetching from individual remotes (the same + issue existed with "--tags", but combination "--all --tags" makes + much less sense than "--all --no-tags"). + + * "git log/diff/format-patch --stat" showed the "N line(s) added" + comment in user's locale and caused careless submitters to send + patches with such a line in them to projects whose project language + is not their language, mildly irritating others. Localization to + the line has been disabled for now. + + * "git log --all-match --grep=A --grep=B" ought to show commits that + mention both A and B, but when these three options are used with + --author or --committer, it showed commits that mention either A or + B (or both) instead. + + * The subcommand to remove the definition of a remote in "git remote" + was named "rm" even though all other subcommands were spelled out. + Introduce "git remote remove" to remove confusion, and keep "rm" as + a backward compatible synonym. + +Also contains a handful of documentation updates. diff --git a/Documentation/RelNotes/1.7.12.3.txt b/Documentation/RelNotes/1.7.12.3.txt new file mode 100644 index 0000000..ecda427 --- /dev/null +++ b/Documentation/RelNotes/1.7.12.3.txt @@ -0,0 +1,34 @@ +Git 1.7.12.3 Release Notes +========================== + +Fixes since v1.7.12.2 +--------------------- + + * "git am" mishandled a patch attached as application/octet-stream + (e.g. not text/*); Content-Transfer-Encoding (e.g. base64) was not + honored correctly. + + * It was unclear in the documentation for "git blame" that it is + unnecessary for users to use the "--follow" option. + + * A repository created with "git clone --single" had its fetch + refspecs set up just like a clone without "--single", leading the + subsequent "git fetch" to slurp all the other branches, defeating + the whole point of specifying "only this branch". + + * "git fetch" over http had an old workaround for an unlikely server + misconfiguration; it turns out that this hurts debuggability of the + configuration in general, and has been reverted. + + * "git fetch" over http advertised that it supports "deflate", which + is much less common, and did not advertise the more common "gzip" on + its Accept-Encoding header. + + * "git receive-pack" (the counterpart to "git push") did not give + progress output while processing objects it received to the puser + when run over the smart-http protocol. + + * "git status" honored the ignore=dirty settings in .gitmodules but + "git commit" didn't. + +Also contains a handful of documentation updates. diff --git a/Documentation/RelNotes/1.7.12.4.txt b/Documentation/RelNotes/1.7.12.4.txt new file mode 100644 index 0000000..c6da3cc --- /dev/null +++ b/Documentation/RelNotes/1.7.12.4.txt @@ -0,0 +1,23 @@ +Git 1.7.12.4 Release Notes +========================== + +Fixes since v1.7.12.3 +--------------------- + + * "git fetch" over the dumb-http revision walker could segfault when + curl's multi interface was used. + + * It was possible to give specific paths for "asciidoc" and other + tools in the documentation toolchain, but not for "xmlto". + + * "gitweb" did not give the correct committer timezone in its feed + output due to a typo. + + * The "-Xours" (and similarly -Xtheirs) backend option to "git + merge -s recursive" was ignored for binary files. Now it is + honored. + + * The "binary" synthetic attribute made "diff" to treat the path as + binary, but not "merge". + +Also contains many documentation updates. diff --git a/Documentation/RelNotes/1.7.12.txt b/Documentation/RelNotes/1.7.12.txt new file mode 100644 index 0000000..010d8c7 --- /dev/null +++ b/Documentation/RelNotes/1.7.12.txt @@ -0,0 +1,136 @@ +Git v1.7.12 Release Notes +========================= + +Updates since v1.7.11 +--------------------- + +UI, Workflows & Features + + * Git can be told to normalize pathnames it read from readdir(3) and + all arguments it got from the command line into precomposed UTF-8 + (assuming that they come as decomposed UTF-8), in order to work + around issues on Mac OS. + + I think there still are other places that need conversion + (e.g. paths that are read from stdin for some commands), but this + should be a good first step in the right direction. + + * Per-user $HOME/.gitconfig file can optionally be stored in + $HOME/.config/git/config instead, which is in line with XDG. + + * The value of core.attributesfile and core.excludesfile default to + $HOME/.config/git/attributes and $HOME/.config/git/ignore respectively + when these files exist. + + * Logic to disambiguate abbreviated object names have been taught to + take advantage of object types that are expected in the context, + e.g. XXXXXX in the "git describe" output v1.2.3-gXXXXXX must be a + commit object, not a blob nor a tree. This will help us prolong + the lifetime of abbreviated object names. + + * "git apply" learned to wiggle the base version and perform three-way + merge when a patch does not exactly apply to the version you have. + + * Scripted Porcelain writers now have access to the credential API via + the "git credential" plumbing command. + + * "git help" used to always default to "man" format even on platforms + where "man" viewer is not widely available. + + * "git clone --local $path" started its life as an experiment to + optionally use link/copy when cloning a repository on the disk, but + we didn't deprecate it after we made the option a no-op to always + use the optimization. The command learned "--no-local" option to + turn this off, as a more explicit alternative over use of file:// + URL. + + * "git fetch" and friends used to say "remote side hung up + unexpectedly" when they failed to get response they expect from the + other side, but one common reason why they don't get expected + response is that the remote repository does not exist or cannot be + read. The error message in this case was updated to give better + hints to the user. + + * "git help -w $cmd" can show HTML version of documentation for + "git-$cmd" by setting help.htmlpath to somewhere other than the + default location where the build procedure installs them locally; + the variable can even point at a http:// URL. + + * "git rebase [-i] --root $tip" can now be used to rewrite all the + history leading to "$tip" down to the root commit. + + * "git rebase -i" learned "-x <cmd>" to insert "exec <cmd>" after + each commit in the resulting history. + + * "git status" gives finer classification to various states of paths + in conflicted state and offer advice messages in its output. + + * "git submodule" learned to deal with nested submodule structure + where a module is contained within a module whose origin is + specified as a relative URL to its superproject's origin. + + * A rather heavy-ish "git completion" script has been split to create + a separate "git prompting" script, to help lazy-autoloading of the + completion part while making prompting part always available. + + * "gitweb" pays attention to various forms of credits that are + similar to "Signed-off-by:" lines in the commit objects and + highlights them accordingly. + + +Foreign Interface + + * "mediawiki" remote helper (in contrib/) learned to handle file + attachments. + + * "git p4" now uses "Jobs:" and "p4 move" when appropriate. + + * vcs-svn has been updated to clean-up compilation, lift 32-bit + limitations, etc. + + +Performance, Internal Implementation, etc. (please report possible regressions) + + * Some tests showed false failures caused by a bug in ecryptofs. + + * We no longer use AsciiDoc7 syntax in our documentation and favor a + more modern style. + + * "git am --rebasing" codepath was taught to grab authorship, log + message and the patch text directly out of existing commits. This + will help rebasing commits that have confusing "diff" output in + their log messages. + + * "git index-pack" and "git pack-objects" use streaming API to read + from the object store to avoid having to hold a large blob object + in-core while they are doing their thing. + + * Code to match paths with exclude patterns learned to avoid calling + fnmatch() by comparing fixed leading substring literally when + possible. + + * "git log -n 1 -- rarely-touched-path" was spending unnecessary + cycles after showing the first change to find the next one, only to + discard it. + + * "git svn" got a large-looking code reorganization at the last + minute before the code freeze. + + +Also contains minor documentation updates and code clean-ups. + + +Fixes since v1.7.11 +------------------- + +Unless otherwise noted, all the fixes since v1.7.11 in the maintenance +releases are contained in this release (see release notes to them for +details). + + * "git submodule add" was confused when the superproject did not have + its repository in its usual place in the working tree and GIT_DIR + and GIT_WORK_TREE was used to access it. + + * "git commit --amend" let the user edit the log message and then died + when the human-readable committer name was given insufficiently by + getpwent(3). diff --git a/Documentation/RelNotes/1.7.2.1.txt b/Documentation/RelNotes/1.7.2.1.txt new file mode 100644 index 0000000..1103c47 --- /dev/null +++ b/Documentation/RelNotes/1.7.2.1.txt @@ -0,0 +1,25 @@ +Git v1.7.2.1 Release Notes +========================== + +Fixes since v1.7.2 +------------------ + + * "git instaweb" wasn't useful when your Apache was installed under a + name other than apache2 (e.g. "httpd"). + + * Similarly, "git web--browse" (invoked by "git help -w") learned that + chrome browser is sometimes called google-chrome. + + * An overlong line after ".gitdir: " in a git file caused out of bounds + access to an array on the stack. + + * "git config --path conf.var" to attempt to expand a variable conf.var + that uses "~/" short-hand segfaulted when $HOME environment variable + was not set. + + * Documentation on Cygwin failed to build. + + * The error message from "git pull blarg" when 'blarg' is an unknown + remote name has been improved. + +And other minor fixes and documentation updates. diff --git a/Documentation/RelNotes/1.7.2.2.txt b/Documentation/RelNotes/1.7.2.2.txt new file mode 100644 index 0000000..71eb6a8 --- /dev/null +++ b/Documentation/RelNotes/1.7.2.2.txt @@ -0,0 +1,22 @@ +Git v1.7.2.2 Release Notes +========================== + +Fixes since v1.7.2.1 +-------------------- + + * Object transfer over smart http transport deadlocked the client when + the remote HTTP server returned a failure, instead of erroring it out. + + * git-gui honors custom textconv filters when showing diff and blame; + + * git diff --relative=subdir (without the necessary trailing /) did not + work well; + + * "git diff-files -p --submodule" was recently broken; + + * "git checkout -b n ':/token'" did not work; + + * "git index-pack" (hence "git fetch/clone/pull/push") enabled the object + replacement machinery by mistake (it never should have); + +And other minor fixes and documentation updates. diff --git a/Documentation/RelNotes/1.7.2.3.txt b/Documentation/RelNotes/1.7.2.3.txt new file mode 100644 index 0000000..610960c --- /dev/null +++ b/Documentation/RelNotes/1.7.2.3.txt @@ -0,0 +1,39 @@ +Git v1.7.2.3 Release Notes +========================== + +Fixes since v1.7.2.2 +-------------------- + + * When people try insane things such as delta-compressing 4GiB files, we + threw an assertion failure. + + * "git archive" gave the full commit ID for "$Format:%h$". + + * "git fetch --tags" did not fetch tags when remote.<nick>.tagopt was set + to --no-tags. The command line option now overrides the configuration + setting. + + * "git for-each-ref --format='%(objectname:short)'" has been completely + broken for a long time. + + * "git gc" incorrectly pruned a rerere record that was created long + time ago but still is actively and repeatedly used. + + * "git log --follow -M -p" was seriously broken in 1.7.2, reporting + assertion failure. + + * Running "git log" with an incorrect option started pager nevertheless, + forcing the user to dismiss it. + + * "git rebase" did not work well when the user has diff.renames + configuration variable set. + + * An earlier (and rather old) fix to "git rebase" against a rebased + upstream broke a more normal, non rebased upstream case rather badly, + attempting to re-apply patches that are already accepted upstream. + + * "git submodule sync" forgot to update the superproject's config file + when submodule URL changed. + + * "git pack-refs --all --prune" did not remove a directory that has + become empty. diff --git a/Documentation/RelNotes/1.7.2.4.txt b/Documentation/RelNotes/1.7.2.4.txt new file mode 100644 index 0000000..f7950a4 --- /dev/null +++ b/Documentation/RelNotes/1.7.2.4.txt @@ -0,0 +1,10 @@ +Git v1.7.2.4 Release Notes +========================== + +This is primarily to backport support for the new "add.ignoreErrors" +name given to the existing "add.ignore-errors" configuration variable. + +The next version, Git 1.7.4, and future versions, will support both +old and incorrect name and the new corrected name, but without this +backport, users who want to use the new name "add.ignoreErrors" in +their repositories cannot use older versions of Git. diff --git a/Documentation/RelNotes/1.7.2.5.txt b/Documentation/RelNotes/1.7.2.5.txt new file mode 100644 index 0000000..bf976c4 --- /dev/null +++ b/Documentation/RelNotes/1.7.2.5.txt @@ -0,0 +1,8 @@ +Git v1.7.2.5 Release Notes +========================== + +Fixes since v1.7.2.4 +-------------------- + + * "gitweb" can sometimes be tricked into parrotting a filename argument + given in a request without properly quoting. diff --git a/Documentation/RelNotes/1.7.2.txt b/Documentation/RelNotes/1.7.2.txt new file mode 100644 index 0000000..15cf011 --- /dev/null +++ b/Documentation/RelNotes/1.7.2.txt @@ -0,0 +1,151 @@ +Git v1.7.2 Release Notes +======================== + +Updates since v1.7.1 +-------------------- + + * core.eol configuration and text/eol attributes are the new way to control + the end of line conventions for files in the working tree. + + * core.autocrlf has been made safer - it will now only handle line + endings for new files and files that are LF-only in the + repository. To normalize content that has been checked in with + CRLF, use the new eol/text attributes. + + * The whitespace rules used in "git apply --whitespace" and "git diff" + gained a new member in the family (tab-in-indent) to help projects with + policy to indent only with spaces. + + * When working from a subdirectory, by default, git does not look for its + metadirectory ".git" across filesystems, primarily to help people who + have invocations of git in their custom PS1 prompts, as being outside + of a git repository would look for ".git" all the way up to the root + directory, and NFS mounts are often slow. DISCOVERY_ACROSS_FILESYSTEM + environment variable can be used to tell git not to stop at a + filesystem boundary. + + * Usage help messages generated by parse-options library (i.e. most + of the Porcelain commands) are sent to the standard output now. + + * ':/<string>' notation to look for a commit now takes regular expression + and it is not anchored at the beginning of the commit log message + anymore (this is a backward incompatible change). + + * "git" wrapper learned "-c name=value" option to override configuration + variable from the command line. + + * Improved portability for various platforms including older SunOS, + HP-UX 10/11, AIX, Tru64, etc. and platforms with Python 2.4. + + * The message from "git am -3" has been improved when conflict + resolution ended up making the patch a no-op. + + * "git blame" applies the textconv filter to the contents it works + on, when available. + + * "git checkout --orphan newbranch" is similar to "-b newbranch" but + prepares to create a root commit that is not connected to any existing + commit. + + * "git cherry-pick" learned to pick a range of commits + (e.g. "cherry-pick A..B" and "cherry-pick --stdin"), so did "git + revert"; these do not support the nicer sequencing control "rebase + [-i]" has, though. + + * "git cherry-pick" and "git revert" learned --strategy option to specify + the merge strategy to be used when performing three-way merges. + + * "git cvsserver" can be told to use pserver; its password file can be + stored outside the repository. + + * The output from the textconv filter used by "git diff" can be cached to + speed up their reuse. + + * "git diff --word-diff=<mode>" extends the existing "--color-words" + option, making it more useful in color-challenged environments. + + * The regexp to detect function headers used by "git diff" for PHP has + been enhanced for visibility modifiers (public, protected, etc.) to + better support PHP5. + + * "diff.noprefix" configuration variable can be used to implicitly + ask for "diff --no-prefix" behaviour. + + * "git for-each-ref" learned "%(objectname:short)" that gives the object + name abbreviated. + + * "git format-patch" learned --signature option and format.signature + configuration variable to customize the e-mail signature used in the + output. + + * Various options to "git grep" (e.g. --count, --name-only) work better + with binary files. + + * "git grep" learned "-Ovi" to open the files with hits in your editor. + + * "git help -w" learned "chrome" and "chromium" browsers. + + * "git log --decorate" shows commit decorations in various colours. + + * "git log --follow <path>" follows across copies (it used to only follow + renames). This may make the processing more expensive. + + * "git log --pretty=format:<template>" specifier learned "% <something>" + magic that inserts a space only when %<something> expands to a + non-empty string; this is similar to "%+<something>" magic, but is + useful in a context to generate a single line output. + + * "git notes prune" learned "-n" (dry-run) and "-v" options, similar to + what "git prune" has. + + * "git patch-id" can be fed a mbox without getting confused by the + signature line in the format-patch output. + + * "git remote" learned "set-branches" subcommand. + + * "git rev-list A..B" learned --ancestry-path option to further limit + the result to the commits that are on the ancestry chain between A and + B (i.e. commits that are not descendants of A are excluded). + + * "git show -5" is equivalent to "git show --do-walk 5"; this is similar + to the update to make "git show master..next" walk the history, + introduced in 1.6.4. + + * "git status [-s] --ignored" can be used to list ignored paths. + + * "git status -s -b" shows the current branch in the output. + + * "git status" learned "--ignore-submodules" option. + + * Various "gitweb" enhancements and clean-ups, including syntax + highlighting, "plackup" support for instaweb, .fcgi suffix to run + it as FastCGI script, etc. + + * The test harness has been updated to produce TAP-friendly output. + + * Many documentation improvement patches are also included. + + +Fixes since v1.7.1 +------------------ + +All of the fixes in v1.7.1.X maintenance series are included in this +release, unless otherwise noted. + + * We didn't URL decode "file:///path/to/repo" correctly when path/to/repo + had percent-encoded characters (638794c, 9d2e942, ce83eda, 3c73a1d). + + * "git clone" did not configure remote.origin.url correctly for bare + clones (df61c889). + + * "git diff --graph" works better with "--color-words" and other options + (81fa024..4297c0a). + + * "git diff" could show ambiguous abbreviation of blob object names on + its "index" line (3e5a188). + + * "git reset --hard" started from a wrong directory and a working tree in + a nonstandard location is in use got confused (560fb6a1). + + * "git read-tree -m A B" used to switch to branch B while retaining + local changes added an incorrect cache-tree information (b1f47514). diff --git a/Documentation/RelNotes/1.7.3.1.txt b/Documentation/RelNotes/1.7.3.1.txt new file mode 100644 index 0000000..002c93b --- /dev/null +++ b/Documentation/RelNotes/1.7.3.1.txt @@ -0,0 +1,14 @@ +Git v1.7.3.1 Release Notes +========================== + +Fixes since v1.7.3 +------------------ + + * "git stash show stash@{$n}" was accidentally broken in 1.7.3 ("git + stash show" without any argument still worked, though). + + * "git stash branch $branch stash@{$n}" was accidentally broken in + 1.7.3 and started dropping the named stash even when branch creation + failed. + +And other minor fixes and documentation updates. diff --git a/Documentation/RelNotes/1.7.3.2.txt b/Documentation/RelNotes/1.7.3.2.txt new file mode 100644 index 0000000..5c93b85 --- /dev/null +++ b/Documentation/RelNotes/1.7.3.2.txt @@ -0,0 +1,5 @@ +Git v1.7.3.2 Release Notes +========================== + +This is primarily to push out many documentation fixes accumulated since +the 1.7.3.1 release. diff --git a/Documentation/RelNotes/1.7.3.3.txt b/Documentation/RelNotes/1.7.3.3.txt new file mode 100644 index 0000000..9b2b244 --- /dev/null +++ b/Documentation/RelNotes/1.7.3.3.txt @@ -0,0 +1,54 @@ +Git v1.7.3.3 Release Notes +========================== + +In addition to the usual fixes, this release also includes support for +the new "add.ignoreErrors" name given to the existing "add.ignore-errors" +configuration variable. + +The next version, Git 1.7.4, and future versions, will support both +old and incorrect name and the new corrected name, but without this +backport, users who want to use the new name "add.ignoreErrors" in +their repositories cannot use older versions of Git. + +Fixes since v1.7.3.2 +-------------------- + + * "git apply" segfaulted when a bogus input is fed to it. + + * Running "git cherry-pick --ff" on a root commit segfaulted. + + * "diff", "blame" and friends incorrectly applied textconv filters to + symlinks. + + * Highlighting of whitespace breakage in "diff" output was showing + incorrect amount of whitespaces when blank-at-eol is set and the line + consisted only of whitespaces and a TAB. + + * "diff" was overly inefficient when trying to find the line to use for + the function header (i.e. equivalent to --show-c-function of GNU diff). + + * "git imap-send" depends on libcrypto but our build rule relied on the + linker to implicitly link it via libssl, which was wrong. + + * "git merge-file" can be called from within a subdirectory now. + + * "git repack -f" expanded and recompressed non-delta objects in the + existing pack, which was wasteful. Use new "-F" option if you really + want to (e.g. when changing the pack.compression level). + + * "git rev-list --format="...%x00..." incorrectly chopped its output + at NUL. + + * "git send-email" did not correctly remove duplicate mail addresses from + the Cc: header that appear on the To: header. + + * The completion script (in contrib/completion) ignored lightweight tags + in __git_ps1(). + + * "git-blame" mode (in contrib/emacs) didn't say (require 'format-spec) + even though it depends on it; it didn't work with Emacs 22 or older + unless Gnus is used. + + * "git-p4" (in contrib/) did not correctly handle deleted files. + +Other minor fixes and documentation updates are also included. diff --git a/Documentation/RelNotes/1.7.3.4.txt b/Documentation/RelNotes/1.7.3.4.txt new file mode 100644 index 0000000..e57f7c1 --- /dev/null +++ b/Documentation/RelNotes/1.7.3.4.txt @@ -0,0 +1,45 @@ +Git v1.7.3.4 Release Notes +========================== + +Fixes since v1.7.3.3 +-------------------- + + * Smart HTTP transport used to incorrectly retry redirected POST + request with GET request. + + * "git apply" did not correctly handle patches that only change modes + if told to apply while stripping leading paths with -p option. + + * "git apply" can deal with patches with timezone formatted with a + colon between the hours and minutes part (e.g. "-08:00" instead of + "-0800"). + + * "git checkout" removed an untracked file "foo" from the working + tree when switching to a branch that contains a tracked path + "foo/bar". Prevent this, just like the case where the conflicting + path were "foo" (c752e7f..7980872d). + + * "git cherry-pick" or "git revert" refused to work when a path that + would be modified by the operation was stat-dirty without a real + difference in the contents of the file. + + * "git diff --check" reported an incorrect line number for added + blank lines at the end of file. + + * "git imap-send" failed to build under NO_OPENSSL. + + * Setting log.decorate configuration variable to "0" or "1" to mean + "false" or "true" did not work. + + * "git push" over dumb HTTP protocol did not work against WebDAV + servers that did not terminate a collection name with a slash. + + * "git tag -v" did not work with GPG signatures in rfc1991 mode. + + * The post-receive-email sample hook was accidentally broken in 1.7.3.3 + update. + + * "gitweb" can sometimes be tricked into parrotting a filename argument + given in a request without properly quoting. + +Other minor fixes and documentation updates are also included. diff --git a/Documentation/RelNotes/1.7.3.5.txt b/Documentation/RelNotes/1.7.3.5.txt new file mode 100644 index 0000000..40f3ba5 --- /dev/null +++ b/Documentation/RelNotes/1.7.3.5.txt @@ -0,0 +1,34 @@ +Git 1.7.3.5 Release Notes +========================= + + * The xfuncname pattern used by "git diff" and "git grep" to show the + last notable line in context were broken for python and ruby for a long + time. + + * "git merge" into an unborn branch removed an untracked file "foo" from + the working tree when merged branch had "foo" (this fix was already in + 1.7.3.3 but was omitted from the release notes by mistake). + + * "git status -s" did not quote unprintable characters in paths as + documented. + + * "git am --abort" used to always reset to the commit at the beginning of + the last "am" invocation that has stopped, losing any unrelated commits + that may have been made since then. Now it refrains from doing so and + instead issues a warning. + + * "git blame" incorrectly reused bogusly cached result of textconv + filter for files from the working tree. + + * "git commit" used to abort after the user edited the log message + when the committer information was not correctly set up. It now + aborts before starting the editor. + + * "git commit --date=invalid" used to silently ignore the incorrectly + specified date; it is now diagnosed as an error. + + * "git rebase --skip" to skip the last commit in a series used to fail + to run post-rewrite hook and to copy notes from old commits that have + successfully been rebased so far. Now it do (backmerge ef88ad2). + + * "gitweb" tried to show a wrong feed logo when none was specified. diff --git a/Documentation/RelNotes/1.7.3.txt b/Documentation/RelNotes/1.7.3.txt new file mode 100644 index 0000000..309c331 --- /dev/null +++ b/Documentation/RelNotes/1.7.3.txt @@ -0,0 +1,76 @@ +Git v1.7.3 Release Notes +======================== + +Updates since v1.7.2 +-------------------- + + * git-gui, now at version 0.13.0, got various updates and a new + maintainer, Pat Thoyts. + + * Gitweb allows its configuration to change per each request; it used to + read the configuration once upon startup. + + * When git finds a corrupt object, it now reports the file that contains + it. + + * "git checkout -B <it>" is a shorter way to say "git branch -f <it>" + followed by "git checkout <it>". + + * When "git checkout" or "git merge" refuse to proceed in order to + protect local modification to your working tree, they used to stop + after showing just one path that might be lost. They now show all, + in a format that is easier to read. + + * "git clean" learned "-e" ("--exclude") option. + + * Hunk headers produced for C# files by "git diff" and friends show more + relevant context than before. + + * diff.ignoresubmodules configuration variable can be used to squelch the + differences in submodules reported when running commands (e.g. "diff", + "status", etc.) at the superproject level. + + * http.useragent configuration can be used to lie who you are to your + restrictive firewall. + + * "git rebase --strategy <s>" learned "-X" option to pass extra options + that are understood by the chosen merge strategy. + + * "git rebase -i" learned "exec" that you can insert into the insn sheet + to run a command between its steps. + + * "git rebase" between branches that have many binary changes that do + not conflict should be faster. + + * "git rebase -i" peeks into rebase.autosquash configuration and acts as + if you gave --autosquash from the command line. + + +Also contains various documentation updates. + + +Fixes since v1.7.2 +------------------ + +All of the fixes in v1.7.2.X maintenance series are included in this +release, unless otherwise noted. + + * "git merge -s recursive" (which is the default) did not handle cases + where a directory becomes a file (or vice versa) very well. + + * "git fetch" and friends were accidentally broken for url with "+" in + its path, e.g. "git://git.gnome.org/gtk+". + + * "git fetch $url" (i.e. without refspecs) was broken for quite some + time, if the current branch happen to be tracking some remote. + + * "git ls-tree dir dirgarbage", when "dir" was a directory, + incorrectly recursed into "dir". + + * "git note remove" created unnecessary extra commit when named object + did not have any note to begin with. + + * "git rebase" did not work well if you had diff.noprefix configured. + + * "git -c foo=bar subcmd" did not work well for subcmd that is not + implemented as a built-in command. diff --git a/Documentation/RelNotes/1.7.4.1.txt b/Documentation/RelNotes/1.7.4.1.txt new file mode 100644 index 0000000..79923a6 --- /dev/null +++ b/Documentation/RelNotes/1.7.4.1.txt @@ -0,0 +1,27 @@ +Git v1.7.4.1 Release Notes +========================== + +Fixes since v1.7.4 +------------------ + + * On Windows platform, the codepath to spawn a new child process forgot + to first flush the output buffer. + + * "git bundle" did not use OFS_DELTA encoding, making its output a few + per-cent larger than necessarily. + + * The option to tell "git clone" to recurse into the submodules was + misspelled with an underscore "--recurse_submodules". + + * "git diff --cached HEAD" before the first commit does what an end user + would expect (namely, show what would be committed without further "git + add"). + + * "git fast-import" didn't accept the command to ask for "notes" feature + to be present in its input stream, even though it was capable of the + feature. + + * "git fsck" gave up scanning loose object files in directories with + garbage files. + +And other minor fixes and documentation updates. diff --git a/Documentation/RelNotes/1.7.4.2.txt b/Documentation/RelNotes/1.7.4.2.txt new file mode 100644 index 0000000..ef4ce1f --- /dev/null +++ b/Documentation/RelNotes/1.7.4.2.txt @@ -0,0 +1,58 @@ +Git v1.7.4.2 Release Notes +========================== + +Fixes since v1.7.4.1 +-------------------- + + * Many documentation updates to match "git cmd -h" output and the + git-cmd manual page. + + * We used to keep one file descriptor open for each and every packfile + that we have a mmap window on it (read: "in use"), even when for very + tiny packfiles. We now close the file descriptor early when the entire + packfile fits inside one mmap window. + + * "git bisect visualize" tried to run "gitk" in windowing + environments even when "gitk" is not installed, resulting in a + strange error message. + + * "git clone /no/such/path" did not fail correctly. + + * "git commit" did not correctly error out when the user asked to use a + non existent file as the commit message template. + + * "git diff --stat -B" ran on binary files counted the changes in lines, + which was nonsensical. + + * "git diff -M" opportunistically detected copies, which was not + necessarily a good thing, especially when it is internally run by + recursive merge. + + * "git difftool" didn't tell (g)vimdiff that the files it is reading are + to be opened read-only. + + * "git merge" didn't pay attention to prepare-commit-msg hook, even + though if a merge is conflicted and manually resolved, the subsequent + "git commit" would have triggered the hook, which was inconsistent. + + * "git patch-id" (and commands like "format-patch --ignore-in-upstream" + that use it as their internal logic) handled changes to files that end + with incomplete lines incorrectly. + + * The official value to tell "git push" to push the current branch back + to update the upstream branch it forked from is now called "upstream". + The old name "tracking" is and will be supported. + + * "git submodule update" used to honor the --merge/--rebase option (or + corresponding configuration variables) even for a newly cloned + subproject, which made no sense (so/submodule-no-update-first-time). + + * gitweb's "highlight" interface mishandled tabs. + + * gitweb didn't understand timezones with GMT offset that is not + multiple of a whole hour. + + * gitweb had a few forward-incompatible syntactic constructs and + also used incorrect variable when showing the file mode in a diff. + +And other minor fixes and documentation updates. diff --git a/Documentation/RelNotes/1.7.4.3.txt b/Documentation/RelNotes/1.7.4.3.txt new file mode 100644 index 0000000..02a3d5b --- /dev/null +++ b/Documentation/RelNotes/1.7.4.3.txt @@ -0,0 +1,32 @@ +Git v1.7.4.3 Release Notes +========================== + +Fixes since v1.7.4.2 +-------------------- + + * "git apply" used to confuse lines updated by previous hunks as lines + that existed before when applying a hunk, contributing misapplication + of patches with offsets. + + * "git branch --track" (and "git checkout --track --branch") used to + allow setting up a random non-branch that does not make sense to follow + as the "upstream". The command correctly diagnoses it as an error. + + * "git checkout $other_branch" silently removed untracked symbolic links + in the working tree that are in the way in order to check out paths + under it from the named branch. + + * "git cvsimport" did not bail out immediately when the cvs server cannot + be reached, spewing unnecessary error messages that complain about the + server response that it never got. + + * "git diff --quiet" did not work very well with the "--diff-filter" + option. + + * "git grep -n" lacked a long-hand synonym --line-number. + + * "git stash apply" reported the result of its operation by running + "git status" from the top-level of the working tree; it should (and + now does) run it from the user's working directory. + +And other minor fixes and documentation updates. diff --git a/Documentation/RelNotes/1.7.4.4.txt b/Documentation/RelNotes/1.7.4.4.txt new file mode 100644 index 0000000..ff06e04 --- /dev/null +++ b/Documentation/RelNotes/1.7.4.4.txt @@ -0,0 +1,35 @@ +Git v1.7.4.4 Release Notes +========================== + +Fixes since v1.7.4.3 +-------------------- + + * Compilation of sha1_file.c on BSD platforms were broken due to our + recent use of getrlimit() without including <sys/resource.h>. + + * "git config" did not diagnose incorrect configuration variable names. + + * "git format-patch" did not wrap a long subject line that resulted from + rfc2047 encoding. + + * "git instaweb" should work better again with plackup. + + * "git log --max-count=4 -Sfoobar" now shows 4 commits that changes the + number of occurrences of string "foobar"; it used to scan only for 4 + commits and then emitted only matching ones. + + * "git log --first-parent --boundary $c^..$c" segfaulted on a merge. + + * "git pull" into an empty branch should have behaved as if + fast-forwarding from emptiness to the version being pulled, with + the usual protection against overwriting untracked files. + + * "git submodule" that is run while a merge in the superproject is in + conflicted state tried to process each conflicted submodule up to + three times. + + * "git status" spent all the effort to notice racily-clean index entries + but didn't update the index file to help later operations go faster in + some cases. + +And other minor fixes and documentation updates. diff --git a/Documentation/RelNotes/1.7.4.5.txt b/Documentation/RelNotes/1.7.4.5.txt new file mode 100644 index 0000000..b7a0eeb --- /dev/null +++ b/Documentation/RelNotes/1.7.4.5.txt @@ -0,0 +1,4 @@ +Git v1.7.4.5 Release Notes +========================== + +This contains only minor documentation fixes accumulated since 1.7.4.4. diff --git a/Documentation/RelNotes/1.7.4.txt b/Documentation/RelNotes/1.7.4.txt new file mode 100644 index 0000000..d5bca73 --- /dev/null +++ b/Documentation/RelNotes/1.7.4.txt @@ -0,0 +1,156 @@ +Git v1.7.4 Release Notes +======================== + +Updates since v1.7.3 +-------------------- + + * The documentation Makefile now assumes by default asciidoc 8 and + docbook-xsl >= 1.73. If you have older versions, you can set + ASCIIDOC7 and ASCIIDOC_ROFF, respectively. + + * The option parsers of various commands that create new branches (or + rename existing ones to a new name) were too loose and users were + allowed to give a branch a name that begins with a dash by creative + abuse of their command line options, which only led to burning + themselves. The name of a branch cannot begin with a dash now. + + * System-wide fallback default attributes can be stored in + /etc/gitattributes; the core.attributesfile configuration variable can + be used to customize the path to this file. + + * The thread structure generated by "git send-email" has changed + slightly. Setting the cover letter of the latest series as a reply + to the cover letter of the previous series with --in-reply-to used + to make the new cover letter and all the patches replies to the + cover letter of the previous series; this has been changed to make + the patches in the new series replies to the new cover letter. + + * The Bash completion script in contrib/ has been adjusted to be usable with + Bash 4 (options with '=value' didn't complete). It has been also made + usable with zsh. + + * Different pagers can be chosen depending on which subcommand is + being run under the pager, using the "pager.<subcommand>" variable. + + * The hardcoded tab-width of 8 that is used in whitespace breakage checks is now + configurable via the attributes mechanism. + + * Support of case insensitive filesystems (i.e. "core.ignorecase") has + been improved. For example, the gitignore mechanism didn't pay attention + to case insensitivity. + + * The <tree>:<path> syntax for naming a blob in a tree, and the :<path> + syntax for naming a blob in the index (e.g. "master:Makefile", + ":hello.c") have been extended. You can start <path> with "./" to + implicitly have the (sub)directory you are in prefixed to the + lookup. Similarly, ":../Makefile" from a subdirectory would mean + "the Makefile of the parent directory in the index". + + * "git blame" learned the --show-email option to display the e-mail + addresses instead of the names of authors. + + * "git commit" learned the --fixup and --squash options to help later invocation + of interactive rebase. + + * Command line options to "git cvsimport" whose names are in capital + letters (-A, -M, -R and -S) can now be specified as the default in + the .git/config file by their longer names (cvsimport.authorsFile, + cvsimport.mergeRegex, cvsimport.trackRevisions, cvsimport.ignorePaths). + + * "git daemon" can be built in the MinGW environment. + + * "git daemon" can take more than one --listen option to listen to + multiple addresses. + + * "git describe --exact-match" was optimized not to read commit + objects unnecessarily. + + * "git diff" and "git grep" learned what functions and subroutines + in Fortran, Pascal and Perl look like. + + * "git fetch" learned the "--recurse-submodules" option. + + * "git mergetool" tells vim/gvim to show a three-way diff by default + (use vimdiff2/gvimdiff2 as the tool name for old behavior). + + * "git log -G<pattern>" limits the output to commits whose change has + added or deleted lines that match the given pattern. + + * "git read-tree" with no argument as a way to empty the index is + deprecated; we might want to remove it in the future. Users can + use the new --empty option to be more explicit instead. + + * "git repack -f" does not spend cycles to recompress objects in the + non-delta representation anymore (use -F if you really mean it + e.g. after you changed the core.compression variable setting). + + * "git merge --log" used to limit the resulting merge log to 20 + entries; this is now customizable by giving e.g. "--log=47". + + * "git merge" may work better when all files were moved out of a + directory in one branch while a new file is created in place of that + directory in the other branch. + + * "git merge" learned the "--abort" option, synonymous to + "git reset --merge" when a merge is in progress. + + * "git notes" learned the "merge" subcommand to merge notes refs. + In addition to the default manual conflict resolution, there are + also several notes merge strategies for automatically resolving + notes merge conflicts. + + * "git rebase --autosquash" can use SHA-1 object names to name the + commit which is to be fixed up (e.g. "fixup! e83c5163"). + + * The default "recursive" merge strategy learned the --rename-threshold + option to influence the rename detection, similar to the -M option + of "git diff". From the "git merge" frontend, the "-X<strategy option>" + interface, e.g. "git merge -Xrename-threshold=50% ...", can be used + to trigger this. + + * The "recursive" strategy also learned to ignore various whitespace + changes; the most notable is -Xignore-space-at-eol. + + * "git send-email" learned "--to-cmd", similar to "--cc-cmd", to read + the recipient list from a command output. + + * "git send-email" learned to read and use "To:" from its input files. + + * you can extend "git shell", which is often used on boxes that allow + git-only login over ssh as login shell, with a custom set of + commands. + + * The current branch name in "git status" output can be colored differently + from the generic header color by setting the "color.status.branch" variable. + + * "git submodule sync" updates metainformation for all submodules, + not just the ones that have been checked out. + + * gitweb can use a custom 'highlight' command with its configuration file. + + * other gitweb updates. + + +Also contains various documentation updates. + + +Fixes since v1.7.3 +------------------ + +All of the fixes in the v1.7.3.X maintenance series are included in this +release, unless otherwise noted. + + * "git log --author=me --author=her" did not find commits written by + me or by her; instead it looked for commits written by me and by + her, which is impossible. + + * "git push --progress" shows progress indicators now. + + * "git rebase -i" showed a confusing error message when given a + branch name that does not exist. + + * "git repack" places its temporary packs under $GIT_OBJECT_DIRECTORY/pack + instead of $GIT_OBJECT_DIRECTORY/ to avoid cross directory renames. + + * "git submodule update --recursive --other-flags" passes flags down + to its subinvocations. diff --git a/Documentation/RelNotes/1.7.5.1.txt b/Documentation/RelNotes/1.7.5.1.txt new file mode 100644 index 0000000..c6ebd76 --- /dev/null +++ b/Documentation/RelNotes/1.7.5.1.txt @@ -0,0 +1,47 @@ +Git v1.7.5.1 Release Notes +========================== + +Fixes since v1.7.5 +------------------ + + * When an object "$tree:$path" does not exist, if $path does exist in the + subtree of $tree that corresponds to the subdirectory the user is in, + git now suggests using "$tree:./$path" in addition to the advice to use + the full path from the root of the working tree. + + * The "--date=relative" output format used to say "X years, 12 months" + when it should have said "X+1 years". + + * The smart-HTTP transfer was broken in 1.7.5 when the client needs + to issue a small POST (which uses content-length) and then a large + POST (which uses chunked) back to back. + + * "git clean" used to fail on an empty directory that is not readable, + even though rmdir(2) could remove such a directory. Now we attempt it + as the last resort. + + * The "--dirstat" option of "diff" family of commands used to totally + ignore a change that only rearranged lines within a file. Such a + change now counts as at least a minimum but non zero change. + + * The "--dirstat" option of "diff" family of commands used to use the + pathname in the original, instead of the pathname in the result, + when renames are involved. + + * "git pack-object" did not take core.bigfilethreashold into account + (unlike fast-import); now it does. + + * "git reflog" ignored options like "--format=.." on the command line. + + * "git stash apply" used to refuse to work if there was any change in + the working tree, even when the change did not overlap with the change + the stash recorded. + + * "git stash apply @{99999}" was not diagnosed as an error, even when you + did not have that many stash entries. + + * An error message from "git send-email" to diagnose a broken SMTP + connection configuration lacked a space between "hello=<smtp-domain>" + and "port=<smtp-server-port>". + +And other minor fixes and documentation updates. diff --git a/Documentation/RelNotes/1.7.5.2.txt b/Documentation/RelNotes/1.7.5.2.txt new file mode 100644 index 0000000..951eb7c --- /dev/null +++ b/Documentation/RelNotes/1.7.5.2.txt @@ -0,0 +1,57 @@ +Git v1.7.5.2 Release Notes +========================== + +The release notes to 1.7.5.1 forgot to mention: + + * "git stash -p --no-keep-index" and "git stash --no-keep-index -p" now + mean the same thing. + + * "git upload-pack" (hence "git push" over git native protocol) had a + subtle race condition that could lead to a deadlock. + +Fixes since v1.7.5.1 +-------------------- + + * "git add -p" did not work correctly when a hunk is split and then + one of them was given to the editor. + + * "git add -u" did not resolve a conflict where our history deleted and + their history modified the same file, and the working tree resolved to + keep a file. + + * "git cvsimport" did not know that CVSNT stores its password file in a + location different from the traditional CVS. + + * "git diff-files" did not show the mode information from the working + tree side of an unmerged path correctly. + + * "git diff -M --cached" used to use unmerged path as a possible rename + source candidate, which made no sense. + + * The option name parser in "git fast-import" used prefix matches for + some options where it shouldn't, and accepted non-existent options, + e.g. "--relative-marksmith" or "--forceps". + + * "git format-patch" did not quote RFC822 special characters in the + email address (e.g From: Junio C. Hamano <jch@example.com>, not + From: "Junio C. Hamano" <jch@example.com>). + + * "git format-patch" when run with "--quiet" option used to produce a + nonsense result that consists of alternating empty output. + + * In "git merge", per-branch branch.<name>.mergeoptions configuration + variables did not override the fallback default merge.<option> + configuration variables such as merge.ff, merge.log, etc. + + * "git merge-one-file" did not honor GIT_WORK_TREE settings when + handling a "both sides added, differently" conflict. + + * "git mergetool" did not handle conflicted submoudules gracefully. + + * "git-p4" (in contrib) used a wrong base image while merge a file that + was added on both branches differently. + + * "git rebase -i -p" failed to preserve the history when there is a + redundant merge created with the --no-ff option. + +And other minor fixes and documentation updates. diff --git a/Documentation/RelNotes/1.7.5.3.txt b/Documentation/RelNotes/1.7.5.3.txt new file mode 100644 index 0000000..9c03353 --- /dev/null +++ b/Documentation/RelNotes/1.7.5.3.txt @@ -0,0 +1,32 @@ +Git v1.7.5.3 Release Notes +========================== + +Fixes since v1.7.5.2 +-------------------- + + * The bash completion scripts should correctly work using zsh's bash + completion emulation layer now. + + * Setting $(prefix) in config.mak did not affect where etc/gitconfig + file is read from, even though passing it from the command line of + $(MAKE) did. + + * The logic to handle "&" (expand to UNIX username) in GECOS field + miscounted the length of the name it formatted. + + * "git cherry-pick -s resolve" failed to cherry-pick a root commit. + + * "git diff --word-diff" misbehaved when diff.suppress-blank-empty was + in effect. + + * "git log --stdin path" with an input that has additional pathspec + used to corrupt memory. + + * "git send-pack" (hence "git push") over smalt-HTTP protocol could + deadlock when the client side pack-object died early. + + * Compressed tarball gitweb generates used to be made with the timestamp + of the tarball generation; this was bad because snapshot from the same + tree should result in a same tarball. + +And other minor fixes and documentation updates. diff --git a/Documentation/RelNotes/1.7.5.4.txt b/Documentation/RelNotes/1.7.5.4.txt new file mode 100644 index 0000000..7796df3 --- /dev/null +++ b/Documentation/RelNotes/1.7.5.4.txt @@ -0,0 +1,21 @@ +Git v1.7.5.4 Release Notes +========================== + +Fixes since v1.7.5.3 +-------------------- + + * The single-key mode of "git add -p" was easily fooled into thinking + that it was told to add everything ('a') when up-arrow was pressed by + mistake. + + * Setting a git command that uses custom configuration via "-c var=val" + as an alias caused a crash due to a realloc(3) failure. + + * "git diff -C -C" used to disable the rename detection entirely when + there are too many copy candidate paths in the tree; now it falls + back to "-C" when doing so would keep the copy candidate paths + under the rename detection limit. + + * "git rerere" did not diagnose a corrupt MERGE_RR file in some cases. + +And other minor fixes and documentation updates. diff --git a/Documentation/RelNotes/1.7.5.txt b/Documentation/RelNotes/1.7.5.txt new file mode 100644 index 0000000..987919c --- /dev/null +++ b/Documentation/RelNotes/1.7.5.txt @@ -0,0 +1,132 @@ +Git v1.7.5 Release Notes +======================== + +Updates since v1.7.4 +-------------------- + + * Various MinGW portability fixes. + + * Various git-p4 enhancements (in contrib). + + * Various vcs-svn, git-svn and gitk enhancements and fixes. + + * Various git-gui updates (0.14.0). + + * Update to more modern HP-UX port. + + * The codebase is getting prepared for i18n/l10n; no translated + strings nor translation mechanism in the code yet, but the strings + are being marked for l10n. + + * The bash completion script can now complete symmetric difference + for "git diff" command, e.g. "git diff ...bra<TAB>". + + * The default minimum length of abbreviated and unique object names + can now be configured by setting the core.abbrev configuration + variable. + + * "git apply -v" reports offset lines when the patch does not apply at + the exact location recorded in the diff output. + + * "git config" used to be also known as "git repo-config", but the old + name is now officially deprecated. + + * "git checkout --detach <commit>" is a more user friendly synonym for + "git checkout <commit>^0". + + * "git checkout" performed on detached HEAD gives a warning and + advice when the commit being left behind will become unreachable from + any branch or tag. + + * "git cherry-pick" and "git revert" can be told to use a custom merge + strategy, similar to "git rebase". + + * "git cherry-pick" remembers which commit failed to apply when it is + stopped by conflicts, making it unnecessary to use "commit -c $commit" + to conclude it. + + * "git cvsimport" bails out immediately when the cvs server cannot be + reached, without spewing unnecessary error messages that complain about + the server response it never got. + + * "git fetch" vs "git upload-pack" transfer learned 'no-done' + protocol extension to save one round-trip after the content + negotiation is done. This saves one HTTP RPC, reducing the overall + latency for a trivial fetch. + + * "git fetch" can be told to recursively fetch submodules on-demand. + + * "git grep -f <filename>" learned to treat "-" as "read from the + standard input stream". + + * "git grep --no-index" did not honor pathspecs correctly, returning + paths outside the specified area. + + * "git init" learned the --separate-git-dir option to allow the git + directory for a new repository created elsewhere and linked via the + gitdir mechanism. This is primarily to help submodule support later + to switch between a branch of superproject that has the submodule + and another that does not. + + * "git log" type commands now understand globbing pathspecs. You + can say "git log -- '*.txt'" for example. + + * "git log" family of commands learned --cherry and --cherry-mark + options that can be used to view two diverged branches while omitting + or highlighting equivalent changes that appear on both sides of a + symmetric difference (e.g. "log --cherry A...B"). + + * A lazy "git merge" that didn't say what to merge used to be an error. + When run on a branch that has an upstream defined, however, the command + now merges from the configured upstream. + + * "git mergetool" learned how to drive "beyond compare 3" as well. + + * "git rerere forget" without pathspec used to forget all the saved + conflicts that relate to the current merge; it now requires you to + give it pathspecs. + + * "git rev-list --objects $revs -- $pathspec" now limits the objects listed + in its output properly with the pathspec, in preparation for narrow + clones. + + * "git push" with no parameters gives better advice messages when + "tracking" is used as the push.default semantics or there is no remote + configured yet. + + * A possible value to the "push.default" configuration variable, + 'tracking', gained a synonym that more naturally describes what it + does, 'upstream'. + + * "git rerere" learned a new subcommand "remaining" that is similar to + "status" and lists the paths that had conflicts which are known to + rerere, but excludes the paths that have already been marked as + resolved in the index from its output. "git mergetool" has been + updated to use this facility. + +Also contains various documentation updates. + + +Fixes since v1.7.4 +------------------ + +All of the fixes in the v1.7.4.X maintenance series are included in this +release, unless otherwise noted. + + * "git fetch" from a client that is mostly following the remote + needlessly told all of its refs to the server for both sides to + compute the set of objects that need to be transferred efficiently, + instead of stopping when the server heard enough. In a project with + many tags, this turns out to be extremely wasteful, especially over + the smart HTTP transport (sp/maint-{upload,fetch}-pack-stop-early~1). + + * "git fetch" run from a repository that uses the same repository as + its alternate object store as the repository it is fetching from + did not tell the server that it already has access to objects + reachable from the refs in their common alternate object store, + causing it to fetch unnecessary objects (jc/maint-fetch-alt). + + * "git remote add --mirror" created a configuration that is suitable for + doing both a mirror fetch and a mirror push at the same time, which + made little sense. We now warn and require the command line to specify + either --mirror=fetch or --mirror=push. diff --git a/Documentation/RelNotes/1.7.6.1.txt b/Documentation/RelNotes/1.7.6.1.txt new file mode 100644 index 0000000..42e46ab --- /dev/null +++ b/Documentation/RelNotes/1.7.6.1.txt @@ -0,0 +1,63 @@ +Git v1.7.6.1 Release Notes +========================== + +Fixes since v1.7.6 +------------------ + + * Various codepaths that invoked zlib deflate/inflate assumed that these + functions can compress or uncompress more than 4GB data in one call on + platforms with 64-bit long, which has been corrected. + + * "git unexecutable" reported that "unexecutable" was not found, even + though the actual error was that "unexecutable" was found but did + not have a proper she-bang line to be executed. + + * Error exits from $PAGER were silently ignored. + + * "git checkout -b <branch>" was confused when attempting to create a + branch whose name ends with "-g" followed by hexadecimal digits, + and refused to work. + + * "git checkout -b <branch>" sometimes wrote a bogus reflog entry, + causing later "git checkout -" to fail. + + * "git diff --cc" learned to correctly ignore binary files. + + * "git diff -c/--cc" mishandled a deletion that resolves a conflict, and + looked in the working tree instead. + + * "git fast-export" forgot to quote pathnames with unsafe characters + in its output. + + * "git fetch" over smart-http transport used to abort when the + repository was updated between the initial connection and the + subsequent object transfer. + + * "git fetch" did not recurse into submodules in subdirectories. + + * "git ls-tree" did not error out when asked to show a corrupt tree. + + * "git pull" without any argument left an extra whitespace after the + command name in its reflog. + + * "git push --quiet" was not really quiet. + + * "git rebase -i -p" incorrectly dropped commits from side branches. + + * "git reset [<commit>] paths..." did not reset the index entry correctly + for unmerged paths. + + * "git submodule add" did not allow a relative repository path when + the superproject did not have any default remote url. + + * "git submodule foreach" failed to correctly give the standard input to + the user-supplied command it invoked. + + * submodules that the user has never showed interest in by running + "git submodule init" was incorrectly marked as interesting by "git + submodule sync". + + * "git submodule update --quiet" was not really quiet. + + * "git tag -l <glob>..." did not take multiple glob patterns from the + command line. diff --git a/Documentation/RelNotes/1.7.6.2.txt b/Documentation/RelNotes/1.7.6.2.txt new file mode 100644 index 0000000..67ae414 --- /dev/null +++ b/Documentation/RelNotes/1.7.6.2.txt @@ -0,0 +1,8 @@ +Git v1.7.6.2 Release Notes +========================== + +Fixes since v1.7.6.1 +-------------------- + + * v1.7.6.1 broke "git push --quiet"; it used to be a no-op against an old + version of Git running on the other end, but v1.7.6.1 made it abort. diff --git a/Documentation/RelNotes/1.7.6.3.txt b/Documentation/RelNotes/1.7.6.3.txt new file mode 100644 index 0000000..9597183 --- /dev/null +++ b/Documentation/RelNotes/1.7.6.3.txt @@ -0,0 +1,24 @@ +Git v1.7.6.3 Release Notes +========================== + +Fixes since v1.7.6.2 +-------------------- + + * "git -c var=value subcmd" misparsed the custom configuration when + value contained an equal sign. + + * "git fetch" had a major performance regression, wasting many + needless cycles in a repository where there is no submodules + present. This was especially bad, when there were many refs. + + * "git reflog $refname" did not default to the "show" subcommand as + the documentation advertised the command to do. + + * "git reset" did not leave meaningful log message in the reflog. + + * "git status --ignored" did not show ignored items when there is no + untracked items. + + * "git tag --contains $commit" was unnecessarily inefficient. + +Also contains minor fixes and documentation updates. diff --git a/Documentation/RelNotes/1.7.6.4.txt b/Documentation/RelNotes/1.7.6.4.txt new file mode 100644 index 0000000..e19acac --- /dev/null +++ b/Documentation/RelNotes/1.7.6.4.txt @@ -0,0 +1,32 @@ +Git v1.7.6.4 Release Notes +========================== + +Fixes since v1.7.6.3 +-------------------- + + * The error reporting logic of "git am" when the command is fed a file + whose mail-storage format is unknown was fixed. + + * "git branch --set-upstream @{-1} foo" did not expand @{-1} correctly. + + * "git check-ref-format --print" used to parrot a candidate string that + began with a slash (e.g. /refs/heads/master) without stripping it, to make + the result a suitably normalized string the caller can append to "$GIT_DIR/". + + * "git clone" failed to clone locally from a ".git" file that itself + is not a directory but is a pointer to one. + + * "git clone" from a local repository that borrows from another + object store using a relative path in its objects/info/alternates + file did not adjust the alternates in the resulting repository. + + * "git describe --dirty" did not refresh the index before checking the + state of the working tree files. + + * "git ls-files ../$path" that is run from a subdirectory reported errors + incorrectly when there is no such path that matches the given pathspec. + + * "git mergetool" could loop forever prompting when nothing can be read + from the standard input. + +Also contains minor fixes and documentation updates. diff --git a/Documentation/RelNotes/1.7.6.5.txt b/Documentation/RelNotes/1.7.6.5.txt new file mode 100644 index 0000000..6713132 --- /dev/null +++ b/Documentation/RelNotes/1.7.6.5.txt @@ -0,0 +1,26 @@ +Git v1.7.6.5 Release Notes +========================== + +Fixes since v1.7.6.4 +-------------------- + + * The date parser did not accept timezone designators that lack minutes + part and also has a colon between "hh:mm". + + * After fetching from a remote that has very long refname, the reporting + output could have corrupted by overrunning a static buffer. + + * "git mergetool" did not use its arguments as pathspec, but as a path to + the file that may not even have any conflict. + + * "git name-rev --all" tried to name all _objects_, naturally failing to + describe many blobs and trees, instead of showing only commits as + advertised in its documentation. + + * "git remote rename $a $b" were not careful to match the remote name + against $a (i.e. source side of the remote nickname). + + * "gitweb" used to produce a non-working link while showing the contents + of a blob, when JavaScript actions are enabled. + +Also contains minor fixes and documentation updates. diff --git a/Documentation/RelNotes/1.7.6.6.txt b/Documentation/RelNotes/1.7.6.6.txt new file mode 100644 index 0000000..5343e00 --- /dev/null +++ b/Documentation/RelNotes/1.7.6.6.txt @@ -0,0 +1,16 @@ +Git v1.7.6.6 Release Notes +========================== + +Fixes since v1.7.6.5 +-------------------- + + * The code to look up attributes for paths reused entries from a wrong + directory when two paths in question are in adjacent directories and + the name of the one directory is a prefix of the other. + + * When producing a "thin pack" (primarily used in bundles and smart + HTTP transfers) out of a fully packed repository, we unnecessarily + avoided sending recent objects as a delta against objects we know + the other side has. + +Also contains minor fixes and documentation updates. diff --git a/Documentation/RelNotes/1.7.6.txt b/Documentation/RelNotes/1.7.6.txt new file mode 100644 index 0000000..9ec498e --- /dev/null +++ b/Documentation/RelNotes/1.7.6.txt @@ -0,0 +1,136 @@ +Git v1.7.6 Release Notes +======================== + +Updates since v1.7.5 +-------------------- + + * Various git-svn updates. + + * Updates the way content tags are handled in gitweb. Also adds + a UI to choose common timezone for displaying the dates. + + * Similar to branch names, tagnames that begin with "-" are now + disallowed. + + * Clean-up of the C part of i18n (but not l10n---please wait) + continues. + + * The scripting part of the codebase is getting prepared for i18n/l10n. + + * Pushing and pulling from a repository with large number of refs that + point to identical commits are optimized by not listing the same commit + during the common ancestor negotiation exchange with the other side. + + * Adding a file larger than core.bigfilethreshold (defaults to 1/2 Gig) + using "git add" will send the contents straight to a packfile without + having to hold it and its compressed representation both at the same + time in memory. + + * Processes spawned by "[alias] <name> = !process" in the configuration + can inspect GIT_PREFIX environment variable to learn where in the + working tree the original command was invoked. + + * A magic pathspec ":/" tells a command that limits its operation to + the current directory when ran from a subdirectory to work on the + entire working tree. In general, ":/path/to/file" would be relative + to the root of the working tree hierarchy. + + After "git reset --hard; edit Makefile; cd t/", "git add -u" would + be a no-op, but "git add -u :/" would add the updated contents of + the Makefile at the top level. If you want to name a path in the + current subdirectory whose unusual name begins with ":/", you can + name it by "./:/that/path" or by "\:/that/path". + + * "git blame" learned "--abbrev[=<n>]" option to control the minimum + number of hexdigits shown for commit object names. + + * "git blame" learned "--line-porcelain" that is less efficient but is + easier to parse. + + * Aborting "git commit --interactive" discards updates to the index + made during the interactive session. + + * "git commit" learned a "--patch" option to directly jump to the + per-hunk selection UI of the interactive mode. + + * "git diff" and its family of commands learned --dirstat=0 to show + directories that contribute less than 0.1% of changes. + + * "git diff" and its family of commands learned --dirstat=lines mode to + assess damage to the directory based on number of lines in the patch + output, not based on the similarity numbers. + + * "git format-patch" learned "--quiet" option to suppress the output of + the names of generated files. + + * "git format-patch" quotes people's names when it has RFC822 special + characters in it, e.g. "Junio C. Hamano" <jch@example.com>. Earlier + it was up to the user to do this when using its output. + + * "git format-patch" can take an empty --subject-prefix now. + + * "git grep" learned the "-P" option to take pcre regular expressions. + + * "git log" and friends learned a new "--notes" option to replace the + "--show-notes" option. Unlike "--show-notes", "--notes=<ref>" does + not imply showing the default notes. + + * They also learned a log.abbrevCommit configuration variable to augment + the --abbrev-commit command line option. + + * "git ls-remote" learned "--exit-code" option to consider it a + different kind of error when no remote ref to be shown. + + * "git merge" learned "-" as a short-hand for "the previous branch", just + like the way "git checkout -" works. + + * "git merge" uses "merge.ff" configuration variable to decide to always + create a merge commit (i.e. --no-ff, aka merge.ff=no), refuse to create + a merge commit (i.e. --ff-only, aka merge.ff=only). Setting merge.ff=yes + (or not setting it at all) restores the default behaviour of allowing + fast-forward to happen when possible. + + * p4-import (from contrib) learned a new option --preserve-user. + + * "git read-tree -m" learned "--dry-run" option that reports if a merge + would fail without touching the index nor the working tree. + + * "git rebase" that does not specify on top of which branch to rebase + the current branch now uses @{upstream} of the current branch. + + * "git rebase" finished either normally or with --abort did not + update the reflog for HEAD to record the event to come back to + where it started from. + + * "git remote add -t only-this-branch --mirror=fetch" is now allowed. Earlier + a fetch-mode mirror meant mirror everything, but now it only means refs are + not renamed. + + * "git rev-list --count" used with "--cherry-mark" counts the cherry-picked + commits separately, producing more a useful output. + + * "git submodule update" learned "--force" option to get rid of local + changes in submodules and replace them with the up-to-date version. + + * "git status" and friends ignore .gitmodules file while the file is + still in a conflicted state during a merge, to avoid using information + that is not final and possibly corrupt with conflict markers. + +Also contains various documentation updates and minor miscellaneous +changes. + + +Fixes since v1.7.5 +------------------ + +Unless otherwise noted, all the fixes in 1.7.5.X maintenance track are +included in this release. + + * "git config" used to choke with an insanely long line. + (merge ef/maint-strbuf-init later) + + * "git diff --quiet" did not work well with --diff-filter. + (merge jk/diff-not-so-quick later) + + * "git status -z" did not default to --porcelain output format. + (merge bc/maint-status-z-to-use-porcelain later) diff --git a/Documentation/RelNotes/1.7.7.1.txt b/Documentation/RelNotes/1.7.7.1.txt new file mode 100644 index 0000000..ac9b838 --- /dev/null +++ b/Documentation/RelNotes/1.7.7.1.txt @@ -0,0 +1,60 @@ +Git v1.7.7.1 Release Notes +========================== + +Fixes since v1.7.7 +------------------ + + * On some BSD systems, adding +s bit on directories is detrimental + (it is not necessary on BSD to begin with). "git init --shared" + has been updated to take this into account without extra makefile + settings on platforms the Makefile knows about. + + * After incorrectly written third-party tools store a tag object in + HEAD, git diagnosed it as a repository corruption and refused to + proceed in order to avoid spreading the damage. We now gracefully + recover from such a situation by pretending as if the commit that + is pointed at by the tag were in HEAD. + + * "git apply --whitespace=error" did not bother to report the exact + line number in the patch that introduced new blank lines at the end + of the file. + + * "git apply --index" did not check corrupted patch. + + * "git checkout $tree $directory/" resurrected paths locally removed or + modified only in the working tree in $directory/ that did not appear + in $directory of the given $tree. They should have been kept intact. + + * "git diff $tree $path" used to apply the pathspec at the output stage, + reading the whole tree, wasting resources. + + * The code to check for updated submodules during a "git fetch" of the + superproject had an unnecessary quadratic loop. + + * "git fetch" from a large bundle did not enable the progress output. + + * When "git fsck --lost-and-found" found that an empty blob object in the + object store is unreachable, it incorrectly reported an error after + writing the lost blob out successfully. + + * "git filter-branch" did not refresh the index before checking that the + working tree was clean. + + * "git grep $tree" when run with multiple threads had an unsafe access to + the object database that should have been protected with mutex. + + * The "--ancestry-path" option to "git log" and friends misbehaved in a + history with complex criss-cross merges and showed an uninteresting + side history as well. + + * Test t1304 assumed LOGNAME is always set, which may not be true on + some systems. + + * Tests with --valgrind failed to find "mergetool" scriptlets. + + * "git patch-id" miscomputed the patch-id in a patch that has a line longer + than 1kB. + + * When an "exec" insn failed after modifying the index and/or the working + tree during "rebase -i", we now check and warn that the changes need to + be cleaned up. diff --git a/Documentation/RelNotes/1.7.7.2.txt b/Documentation/RelNotes/1.7.7.2.txt new file mode 100644 index 0000000..e6bbef2 --- /dev/null +++ b/Documentation/RelNotes/1.7.7.2.txt @@ -0,0 +1,44 @@ +Git v1.7.7.2 Release Notes +========================== + +Fixes since v1.7.7.1 +-------------------- + + * We used to drop error messages from libcurl on certain kinds of + errors. + + * Error report from smart HTTP transport, when the connection was + broken in the middle of a transfer, showed a useless message on + a corrupt packet. + + * "git fetch --prune" was unsafe when used with refspecs from the + command line. + + * The attribute mechanism did not use case insensitive match when + core.ignorecase was set. + + * "git bisect" did not notice when it failed to update the working tree + to the next commit to be tested. + + * "git config --bool --get-regexp" failed to separate the variable name + and its value "true" when the variable is defined without "= true". + + * "git remote rename $a $b" were not careful to match the remote name + against $a (i.e. source side of the remote nickname). + + * "git mergetool" did not use its arguments as pathspec, but as a path to + the file that may not even have any conflict. + + * "git diff --[num]stat" used to use the number of lines of context + different from the default, potentially giving different results from + "git diff | diffstat" and confusing the users. + + * "git pull" and "git rebase" did not work well even when GIT_WORK_TREE is + set correctly with GIT_DIR if the current directory is outside the working + tree. + + * "git send-email" did not honor the configured hostname when restarting + the HELO/EHLO exchange after switching TLS on. + + * "gitweb" used to produce a non-working link while showing the contents + of a blob, when JavaScript actions are enabled. diff --git a/Documentation/RelNotes/1.7.7.3.txt b/Documentation/RelNotes/1.7.7.3.txt new file mode 100644 index 0000000..09301f0 --- /dev/null +++ b/Documentation/RelNotes/1.7.7.3.txt @@ -0,0 +1,19 @@ +Git v1.7.7.3 Release Notes +========================== + +Fixes since v1.7.7.2 +-------------------- + + * Adjust the "quick-install-doc" procedures as preformatted + html/manpage are no longer in the source repository. + + * The logic to optimize the locality of the data in a pack introduced in + 1.7.7 was grossly inefficient. + + * The logic to filter out forked projects in the project list in + "gitweb" was broken for some time. + + * "git branch -m/-M" advertised to update RENAME_REF ref in the + commit log message that introduced the feature but not anywhere in + the documentation, and never did update such a ref anyway. This + undocumented misfeature that did not exist has been excised. diff --git a/Documentation/RelNotes/1.7.7.4.txt b/Documentation/RelNotes/1.7.7.4.txt new file mode 100644 index 0000000..e523448 --- /dev/null +++ b/Documentation/RelNotes/1.7.7.4.txt @@ -0,0 +1,14 @@ +Git v1.7.7.4 Release Notes +========================== + +Fixes since v1.7.7.3 +-------------------- + + * A few header dependencies were missing from the Makefile. + + * Some newer parts of the code used C99 __VA_ARGS__ while we still + try to cater to older compilers. + + * "git name-rev --all" tried to name all _objects_, naturally failing to + describe many blobs and trees, instead of showing only commits as + advertised in its documentation. diff --git a/Documentation/RelNotes/1.7.7.5.txt b/Documentation/RelNotes/1.7.7.5.txt new file mode 100644 index 0000000..7b09319 --- /dev/null +++ b/Documentation/RelNotes/1.7.7.5.txt @@ -0,0 +1,14 @@ +Git v1.7.7.5 Release Notes +========================== + +Fixes since v1.7.7.4 +-------------------- + + * After fetching from a remote that has very long refname, the reporting + output could have corrupted by overrunning a static buffer. + + * "git checkout" and "git merge" treated in-tree .gitignore and exclude + file in $GIT_DIR/info/ directory inconsistently when deciding which + untracked files are ignored and expendable. + +Also contains minor fixes and documentation updates. diff --git a/Documentation/RelNotes/1.7.7.6.txt b/Documentation/RelNotes/1.7.7.6.txt new file mode 100644 index 0000000..8df606d --- /dev/null +++ b/Documentation/RelNotes/1.7.7.6.txt @@ -0,0 +1,20 @@ +Git v1.7.7.6 Release Notes +========================== + +Fixes since v1.7.7.5 +-------------------- + + * The code to look up attributes for paths reused entries from a wrong + directory when two paths in question are in adjacent directories and + the name of the one directory is a prefix of the other. + + * A wildcard that matches deeper hierarchy given to the "diff-index" command, + e.g. "git diff-index HEAD -- '*.txt'", incorrectly reported additions of + matching files even when there is no change. + + * When producing a "thin pack" (primarily used in bundles and smart + HTTP transfers) out of a fully packed repository, we unnecessarily + avoided sending recent objects as a delta against objects we know + the other side has. + +Also contains minor fixes and documentation updates. diff --git a/Documentation/RelNotes/1.7.7.7.txt b/Documentation/RelNotes/1.7.7.7.txt new file mode 100644 index 0000000..e79118d --- /dev/null +++ b/Documentation/RelNotes/1.7.7.7.txt @@ -0,0 +1,13 @@ +Git v1.7.7.7 Release Notes +========================== + +Fixes since v1.7.7.6 +-------------------- + + * An error message from 'git bundle' had an unmatched single quote pair in it. + + * 'git diff --histogram' option was not described. + + * 'git imap-send' carried an unused dead code. + +Also contains minor fixes and documentation updates. diff --git a/Documentation/RelNotes/1.7.7.txt b/Documentation/RelNotes/1.7.7.txt new file mode 100644 index 0000000..6eff128 --- /dev/null +++ b/Documentation/RelNotes/1.7.7.txt @@ -0,0 +1,134 @@ +Git v1.7.7 Release Notes +======================== + +Updates since v1.7.6 +-------------------- + + * The scripting part of the codebase is getting prepared for i18n/l10n. + + * Interix, Cygwin and Minix ports got updated. + + * Various updates to git-p4 (in contrib/), fast-import, and git-svn. + + * Gitweb learned to read from /etc/gitweb-common.conf when it exists, + before reading from gitweb_config.perl or from /etc/gitweb.conf + (this last one is read only when per-repository gitweb_config.perl + does not exist). + + * Various codepaths that invoked zlib deflate/inflate assumed that these + functions can compress or uncompress more than 4GB data in one call on + platforms with 64-bit long, which has been corrected. + + * Git now recognizes loose objects written by other implementations that + use a non-standard window size for zlib deflation (e.g. Agit running on + Android with 4kb window). We used to reject anything that was not + deflated with 32kb window. + + * Interaction between the use of pager and coloring of the output has + been improved, especially when a command that is not built-in was + involved. + + * "git am" learned to pass the "--exclude=<path>" option through to underlying + "git apply". + + * You can now feed many empty lines before feeding an mbox file to + "git am". + + * "git archive" can be told to pass the output to gzip compression and + produce "archive.tar.gz". + + * "git bisect" can be used in a bare repository (provided that the test + you perform per each iteration does not need a working tree, of + course). + + * The length of abbreviated object names in "git branch -v" output + now honors the core.abbrev configuration variable. + + * "git check-attr" can take relative paths from the command line. + + * "git check-attr" learned an "--all" option to list the attributes for a + given path. + + * "git checkout" (both the code to update the files upon checking out a + different branch and the code to checkout a specific set of files) learned + to stream the data from object store when possible, without having to + read the entire contents of a file into memory first. An earlier round + of this code that is not in any released version had a large leak but + now it has been plugged. + + * "git clone" can now take a "--config key=value" option to set the + repository configuration options that affect the initial checkout. + + * "git commit <paths>..." now lets you feed relative pathspecs that + refer to outside your current subdirectory. + + * "git diff --stat" learned a --stat-count option to limit the output of + a diffstat report. + + * "git diff" learned a "--histogram" option to use a different diff + generation machinery stolen from jgit, which might give better + performance. + + * "git diff" had a weird worst case behaviour that can be triggered + when comparing files with potentially many places that could match. + + * "git fetch", "git push" and friends no longer show connection + errors for addresses that couldn't be connected to when at least one + address succeeds (this is arguably a regression but a deliberate + one). + + * "git grep" learned "--break" and "--heading" options, to let users mimic + the output format of "ack". + + * "git grep" learned a "-W" option that shows wider context using the same + logic used by "git diff" to determine the hunk header. + + * Invoking the low-level "git http-fetch" without "-a" option (which + git itself never did--normal users should not have to worry about + this) is now deprecated. + + * The "--decorate" option to "git log" and its family learned to + highlight grafted and replaced commits. + + * "git rebase master topci" no longer spews usage hints after giving + the "fatal: no such branch: topci" error message. + + * The recursive merge strategy implementation got a fairly large + fix for many corner cases that may rarely happen in real world + projects (it has been verified that none of the 16000+ merges in + the Linux kernel history back to v2.6.12 is affected with the + corner case bugs this update fixes). + + * "git stash" learned an "--include-untracked option". + + * "git submodule update" used to stop at the first error updating a + submodule; it now goes on to update other submodules that can be + updated, and reports the ones with errors at the end. + + * "git push" can be told with the "--recurse-submodules=check" option to + refuse pushing of the supermodule, if any of its submodules' + commits hasn't been pushed out to their remotes. + + * "git upload-pack" and "git receive-pack" learned to pretend that only a + subset of the refs exist in a repository. This may help a site to + put many tiny repositories into one repository (this would not be + useful for larger repositories as repacking would be problematic). + + * "git verify-pack" has been rewritten to use the "index-pack" machinery + that is more efficient in reading objects in packfiles. + + * test scripts for gitweb tried to run even when CGI-related perl modules + are not installed; they now exit early when the latter are unavailable. + +Also contains various documentation updates and minor miscellaneous +changes. + + +Fixes since v1.7.6 +------------------ + +Unless otherwise noted, all fixes in the 1.7.6.X maintenance track are +included in this release. + + * "git branch -m" and "git checkout -b" incorrectly allowed the tip + of the branch that is currently checked out updated. diff --git a/Documentation/RelNotes/1.7.8.1.txt b/Documentation/RelNotes/1.7.8.1.txt new file mode 100644 index 0000000..33dc948 --- /dev/null +++ b/Documentation/RelNotes/1.7.8.1.txt @@ -0,0 +1,38 @@ +Git v1.7.8.1 Release Notes +========================== + +Fixes since v1.7.8 +------------------ + + * In some codepaths (notably, checkout and merge), the ignore patterns + recorded in $GIT_DIR/info/exclude were not honored. They now are. + + * "git apply --check" did not error out when given an empty input + without any patch. + + * "git archive" mistakenly allowed remote clients to ask for commits + that are not at the tip of any ref. + + * "git checkout" and "git merge" treated in-tree .gitignore and exclude + file in $GIT_DIR/info/ directory inconsistently when deciding which + untracked files are ignored and expendable. + + * LF-to-CRLF streaming filter used when checking out a large-ish blob + fell into an infinite loop with a rare input. + + * The function header pattern for files with "diff=cpp" attribute did + not consider "type *funcname(type param1,..." as the beginning of a + function. + + * The error message from "git diff" and "git status" when they fail + to inspect changes in submodules did not report which submodule they + had trouble with. + + * After fetching from a remote that has very long refname, the reporting + output could have corrupted by overrunning a static buffer. + + * "git pack-objects" avoids creating cyclic dependencies among deltas + when seeing a broken packfile that records the same object in both + the deflated form and as a delta. + +Also contains minor fixes and documentation updates. diff --git a/Documentation/RelNotes/1.7.8.2.txt b/Documentation/RelNotes/1.7.8.2.txt new file mode 100644 index 0000000..b9c66aa --- /dev/null +++ b/Documentation/RelNotes/1.7.8.2.txt @@ -0,0 +1,71 @@ +Git v1.7.8.2 Release Notes +========================== + +Fixes since v1.7.8.1 +-------------------- + + * Porcelain commands like "git reset" did not distinguish deletions + and type-changes from ordinary modification, and reported them with + the same 'M' moniker. They now use 'D' (for deletion) and 'T' (for + type-change) to match "git status -s" and "git diff --name-status". + + * The configuration file parser used for sizes (e.g. bigFileThreshold) + did not correctly interpret 'g' suffix. + + * The replacement implementation for snprintf used on platforms with + native snprintf that is broken did not use va_copy correctly. + + * LF-to-CRLF streaming filter replaced all LF with CRLF, which might + be technically correct but not friendly to people who are trying + to recover from earlier mistakes of using CRLF in the repository + data in the first place. It now refrains from doing so for LF that + follows a CR. + + * git native connection going over TCP (not over SSH) did not set + SO_KEEPALIVE option which failed to receive link layer errors. + + * "git branch -m <current branch> HEAD" is an obvious no-op but was not + allowed. + + * "git checkout -m" did not recreate the conflicted state in a "both + sides added, without any common ancestor version" conflict + situation. + + * "git cherry-pick $commit" (not a range) created an unnecessary + sequencer state and interfered with valid workflow to use the + command during a session to cherry-pick multiple commits. + + * You could make "git commit" segfault by giving the "--no-message" + option. + + * "fast-import" did not correctly update an existing notes tree, + possibly corrupting the fan-out. + + * "git fetch-pack" accepted unqualified refs that do not begin with + refs/ by mistake and compensated it by matching the refspec with + tail-match, which was doubly wrong. This broke fetching from a + repository with a funny named ref "refs/foo/refs/heads/master" and a + 'master' branch with "git fetch-pack refs/heads/master", as the + command incorrectly considered the former a "match". + + * "git log --follow" did not honor the rename threshold score given + with the -M option (e.g. "-M50%"). + + * "git mv" gave suboptimal error/warning messages when it overwrites + target files. It also did not pay attention to "-v" option. + + * Authenticated "git push" over dumb HTTP were broken with a recent + change and failed without asking for password when username is + given. + + * "git push" to an empty repository over HTTP were broken with a + recent change to the ref handling. + + * "git push -v" forgot how to be verbose by mistake. It now properly + becomes verbose when asked to. + + * When a "reword" action in "git rebase -i" failed to run "commit --amend", + we did not give the control back to the user to resolve the situation, and + instead kept the original commit log message. + +Also contains minor fixes and documentation updates. diff --git a/Documentation/RelNotes/1.7.8.3.txt b/Documentation/RelNotes/1.7.8.3.txt new file mode 100644 index 0000000..a92714c --- /dev/null +++ b/Documentation/RelNotes/1.7.8.3.txt @@ -0,0 +1,16 @@ +Git v1.7.8.3 Release Notes +========================== + +Fixes since v1.7.8.2 +-------------------- + + * Attempt to fetch from an empty file pretending it to be a bundle did + not error out correctly. + + * gitweb did not correctly fall back to configured $fallback_encoding + that is not 'latin1'. + + * "git clone --depth $n" did not catch a non-number given as $n as an + error. + +Also contains minor fixes and documentation updates. diff --git a/Documentation/RelNotes/1.7.8.4.txt b/Documentation/RelNotes/1.7.8.4.txt new file mode 100644 index 0000000..9bebdbf --- /dev/null +++ b/Documentation/RelNotes/1.7.8.4.txt @@ -0,0 +1,23 @@ +Git v1.7.8.4 Release Notes +========================== + +Fixes since v1.7.8.3 +-------------------- + + * The code to look up attributes for paths reused entries from a wrong + directory when two paths in question are in adjacent directories and + the name of the one directory is a prefix of the other. + + * A wildcard that matches deeper hierarchy given to the "diff-index" command, + e.g. "git diff-index HEAD -- '*.txt'", incorrectly reported additions of + matching files even when there is no change. + + * When producing a "thin pack" (primarily used in bundles and smart + HTTP transfers) out of a fully packed repository, we unnecessarily + avoided sending recent objects as a delta against objects we know + the other side has. + + * "git send-email" did not properly treat sendemail.multiedit as a + boolean (e.g. setting it to "false" did not turn it off). + +Also contains minor fixes and documentation updates. diff --git a/Documentation/RelNotes/1.7.8.5.txt b/Documentation/RelNotes/1.7.8.5.txt new file mode 100644 index 0000000..011fd2a --- /dev/null +++ b/Documentation/RelNotes/1.7.8.5.txt @@ -0,0 +1,19 @@ +Git v1.7.8.5 Release Notes +========================== + +Fixes since v1.7.8.4 +-------------------- + + * Dependency on our thread-utils.h header file was missing for + objects that depend on it in the Makefile. + + * "git am" when fed an empty file did not correctly finish reading it + when it attempts to guess the input format. + + * "git grep -P" (when PCRE is enabled in the build) did not match the + beginning and the end of the line correctly with ^ and $. + + * "git rebase -m" tried to run "git notes copy" needlessly when + nothing was rewritten. + +Also contains minor fixes and documentation updates. diff --git a/Documentation/RelNotes/1.7.8.6.txt b/Documentation/RelNotes/1.7.8.6.txt new file mode 100644 index 0000000..d9bf2b7 --- /dev/null +++ b/Documentation/RelNotes/1.7.8.6.txt @@ -0,0 +1,22 @@ +Git v1.7.8.6 Release Notes +========================== + +Fixes since v1.7.8.5 +-------------------- + + * An error message from 'git bundle' had an unmatched single quote pair in it. + + * 'git diff --histogram' option was not described. + + * Documentation for 'git rev-list' had minor formatting errors. + + * 'git imap-send' carried an unused dead code. + + * The way 'git fetch' implemented its connectivity check over + received objects was overly pessimistic, and wasted a lot of + cycles. + + * Various minor backports of fixes from the 'master' and the 'maint' + branch. + +Also contains minor fixes and documentation updates. diff --git a/Documentation/RelNotes/1.7.8.txt b/Documentation/RelNotes/1.7.8.txt new file mode 100644 index 0000000..2493113 --- /dev/null +++ b/Documentation/RelNotes/1.7.8.txt @@ -0,0 +1,161 @@ +Git v1.7.8 Release Notes +======================== + +Updates since v1.7.7 +-------------------- + + * Some git-svn, git-gui, git-p4 (in contrib) and msysgit updates. + + * Updates to bash completion scripts. + + * The build procedure has been taught to take advantage of computed + dependency automatically when the compiler supports it. + + * The date parser now accepts timezone designators that lack minutes + part and also has a colon between "hh:mm". + + * The contents of the /etc/mailname file, if exists, is used as the + default value of the hostname part of the committer/author e-mail. + + * "git am" learned how to read from patches generated by Hg. + + * "git archive" talking with a remote repository can report errors + from the remote side in a more informative way. + + * "git branch" learned an explicit --list option to ask for branches + listed, optionally with a glob matching pattern to limit its output. + + * "git check-attr" learned "--cached" option to look at .gitattributes + files from the index, not from the working tree. + + * Variants of "git cherry-pick" and "git revert" that take multiple + commits learned to "--continue" and "--abort". + + * "git daemon" gives more human readable error messages to clients + using ERR packets when appropriate. + + * Errors at the network layer is logged by "git daemon". + + * "git diff" learned "--minimal" option to spend extra cycles to come + up with a minimal patch output. + + * "git diff" learned "--function-context" option to show the whole + function as context that was affected by a change. + + * "git difftool" can be told to skip launching the tool for a path by + answering 'n' to its prompt. + + * "git fetch" learned to honor transfer.fsckobjects configuration to + validate the objects that were received from the other end, just like + "git receive-pack" (the receiving end of "git push") does. + + * "git fetch" makes sure that the set of objects it received from the + other end actually completes the history before updating the refs. + "git receive-pack" (the receiving end of "git push") learned to do the + same. + + * "git fetch" learned that fetching/cloning from a regular file on the + filesystem is not necessarily a request to unpack a bundle file; the + file could be ".git" with "gitdir: <path>" in it. + + * "git for-each-ref" learned "%(contents:subject)", "%(contents:body)" + and "%(contents:signature)". The last one is useful for signed tags. + + * "git grep" used to incorrectly pay attention to .gitignore files + scattered in the directory it was working in even when "--no-index" + option was used. It no longer does this. The "--exclude-standard" + option needs to be given to explicitly activate the ignore + mechanism. + + * "git grep" learned "--untracked" option, where given patterns are + searched in untracked (but not ignored) files as well as tracked + files in the working tree, so that matches in new but not yet + added files do not get missed. + + * The recursive merge backend no longer looks for meaningless + existing merges in submodules unless in the outermost merge. + + * "git log" and friends learned "--children" option. + + * "git ls-remote" learned to respond to "-h"(elp) requests. + + * "mediawiki" remote helper can interact with (surprise!) MediaWiki + with "git fetch" & "git push". + + * "git merge" learned the "--edit" option to allow users to edit the + merge commit log message. + + * "git rebase -i" can be told to use special purpose editor suitable + only for its insn sheet via sequence.editor configuration variable. + + * "git send-email" learned to respond to "-h"(elp) requests. + + * "git send-email" allows the value given to sendemail.aliasfile to begin + with "~/" to refer to the $HOME directory. + + * "git send-email" forces use of Authen::SASL::Perl to work around + issues between Authen::SASL::Cyrus and AUTH PLAIN/LOGIN. + + * "git stash" learned "--include-untracked" option to stash away + untracked/ignored cruft from the working tree. + + * "git submodule clone" does not leak an error message to the UI + level unnecessarily anymore. + + * "git submodule update" learned to honor "none" as the value for + submodule.<name>.update to specify that the named submodule should + not be checked out by default. + + * When populating a new submodule directory with "git submodule init", + the $GIT_DIR metainformation directory for submodules is created inside + $GIT_DIR/modules/<name>/ directory of the superproject and referenced + via the gitfile mechanism. This is to make it possible to switch + between commits in the superproject that has and does not have the + submodule in the tree without re-cloning. + + * "gitweb" leaked unescaped control characters from syntax hiliter + outputs. + + * "gitweb" can be told to give custom string at the end of the HTML + HEAD element. + + * "gitweb" now has its own manual pages. + + +Also contains other documentation updates and minor code cleanups. + + +Fixes since v1.7.7 +------------------ + +Unless otherwise noted, all fixes in the 1.7.7.X maintenance track are +included in this release. + + * HTTP transport did not use pushurl correctly, and also did not tell + what host it is trying to authenticate with when asking for + credentials. + (merge deba493 jk/http-auth later to maint). + + * "git blame" was aborted if started from an uncommitted content and + the path had the textconv filter in effect. + (merge 8518088 ss/blame-textconv-fake-working-tree later to maint). + + * Adding many refs to the local repository in one go (e.g. "git fetch" + that fetches many tags) and looking up a ref by name in a repository + with too many refs were unnecessarily slow. + (merge 17d68a54d jp/get-ref-dir-unsorted later to maint). + + * Report from "git commit" on untracked files was confused under + core.ignorecase option. + (merge 395c7356 jk/name-hash-dirent later to maint). + + * "git merge" did not understand ":/<pattern>" as a way to name a commit. + + " "git push" on the receiving end used to call post-receive and post-update + hooks for attempted removal of non-existing refs. + (merge 160b81ed ph/push-to-delete-nothing later to maint). + + * Help text for "git remote set-url" and "git remote set-branches" + were misspelled. + (merge c49904e fc/remote-seturl-usage-fix later to maint). + (merge 656cdf0 jc/remote-setbranches-usage-fix later to maint). diff --git a/Documentation/RelNotes/1.7.9.1.txt b/Documentation/RelNotes/1.7.9.1.txt new file mode 100644 index 0000000..6957183 --- /dev/null +++ b/Documentation/RelNotes/1.7.9.1.txt @@ -0,0 +1,63 @@ +Git v1.7.9.1 Release Notes +========================== + +Fixes since v1.7.9 +------------------ + + * The makefile allowed environment variable X seep into it result in + command names suffixed with unnecessary strings. + + * The set of included header files in compat/inet-{ntop,pton} + wrappers was updated for Windows some time ago, but in a way that + broke Solaris build. + + * rpmbuild noticed an unpackaged but installed *.mo file and failed. + + * Subprocesses spawned from various git programs were often left running + to completion even when the top-level process was killed. + + * "git add -e" learned not to show a diff for an otherwise unmodified + submodule that only has uncommitted local changes in the patch + prepared by for the user to edit. + + * Typo in "git branch --edit-description my-tpoic" was not diagnosed. + + * Using "git grep -l/-L" together with options -W or --break may not + make much sense as the output is to only count the number of hits + and there is no place for file breaks, but the latter options made + "-l/-L" to miscount the hits. + + * "git log --first-parent $pathspec" did not stay on the first parent + chain and veered into side branch from which the whole change to the + specified paths came. + + * "git merge --no-edit $tag" failed to honor the --no-edit option. + + * "git merge --ff-only $tag" failed because it cannot record the + required mergetag without creating a merge, but this is so common + operation for branch that is used _only_ to follow the upstream, so + it was changed to allow fast-forwarding without recording the mergetag. + + * "git mergetool" now gives an empty file as the common base version + to the backend when dealing with the "both sides added, differently" + case. + + * "git push -q" was not sufficiently quiet. + + * When "git push" fails to update any refs, the client side did not + report an error correctly to the end user. + + * "rebase" and "commit --amend" failed to work on commits with ancient + timestamps near year 1970. + + * When asking for a tag to be pulled, "request-pull" did not show the + name of the tag prefixed with "tags/", which would have helped older + clients. + + * "git submodule add $path" forgot to recompute the name to be stored + in .gitmodules when the submodule at $path was once added to the + superproject and already initialized. + + * Many small corner case bugs on "git tag -n" was corrected. + +Also contains minor fixes and documentation updates. diff --git a/Documentation/RelNotes/1.7.9.2.txt b/Documentation/RelNotes/1.7.9.2.txt new file mode 100644 index 0000000..e500da7 --- /dev/null +++ b/Documentation/RelNotes/1.7.9.2.txt @@ -0,0 +1,69 @@ +Git v1.7.9.2 Release Notes +========================== + +Fixes since v1.7.9.1 +-------------------- + + * Bash completion script (in contrib/) did not like a pattern that + begins with a dash to be passed to __git_ps1 helper function. + + * Adaptation of the bash completion script (in contrib/) for zsh + incorrectly listed all subcommands when "git <TAB><TAB>" was given + to ask for list of porcelain subcommands. + + * The build procedure for profile-directed optimized binary was not + working very well. + + * Some systems need to explicitly link -lcharset to get locale_charset(). + + * t5541 ignored user-supplied port number used for HTTP server testing. + + * The error message emitted when we see an empty loose object was + not phrased correctly. + + * The code to ask for password did not fall back to the terminal + input when GIT_ASKPASS is set but does not work (e.g. lack of X + with GUI askpass helper). + + * We failed to give the true terminal width to any subcommand when + they are invoked with the pager, i.e. "git -p cmd". + + * map_user() was not rewriting its output correctly, which resulted + in the user visible symptom that "git blame -e" sometimes showed + excess '>' at the end of email addresses. + + * "git checkout -b" did not allow switching out of an unborn branch. + + * When you have both .../foo and .../foo.git, "git clone .../foo" did not + favor the former but the latter. + + * "git commit" refused to create a commit when entries added with + "add -N" remained in the index, without telling Git what their content + in the next commit should be. We should have created the commit without + these paths. + + * "git diff --stat" said "files", "insertions", and "deletions" even + when it is showing one "file", one "insertion" or one "deletion". + + * The output from "git diff --stat" for two paths that have the same + amount of changes showed graph bars of different length due to the + way we handled rounding errors. + + * "git grep" did not pay attention to -diff (hence -binary) attribute. + + * The transport programs (fetch, push, clone)ignored --no-progress + and showed progress when sending their output to a terminal. + + * Sometimes error status detected by a check in an earlier phase of + "git receive-pack" (the other end of "git push") was lost by later + checks, resulting in false indication of success. + + * "git rev-list --verify" sometimes skipped verification depending on + the phase of the moon, which dates back to 1.7.8.x series. + + * Search box in "gitweb" did not accept non-ASCII characters correctly. + + * Search interface of "gitweb" did not show multiple matches in the same file + correctly. + +Also contains minor fixes and documentation updates. diff --git a/Documentation/RelNotes/1.7.9.3.txt b/Documentation/RelNotes/1.7.9.3.txt new file mode 100644 index 0000000..91c6501 --- /dev/null +++ b/Documentation/RelNotes/1.7.9.3.txt @@ -0,0 +1,51 @@ +Git v1.7.9.3 Release Notes +========================== + +Fixes since v1.7.9.2 +-------------------- + + * "git p4" (in contrib/) submit the changes to a wrong place when the + "--use-client-spec" option is set. + + * The config.mak.autogen generated by optional autoconf support tried + to link the binary with -lintl even when libintl.h is missing from + the system. + + * When the filter driver exits before reading the content before the + main git process writes the contents to be filtered to the pipe to + it, the latter could be killed with SIGPIPE instead of ignoring + such an event as an error. + + * "git add --refresh <pathspec>" used to warn about unmerged paths + outside the given pathspec. + + * The bulk check-in codepath in "git add" streamed contents that + needs smudge/clean filters without running them, instead of punting + and delegating to the codepath to run filters after slurping + everything to core. + + * "git branch --with $that" assumed incorrectly that the user will never + ask the question with nonsense value in $that. + + * "git bundle create" produced a corrupt bundle file upon seeing + commits with excessively long subject line. + + * When a remote helper exits before reading the blank line from the + main git process to signal the end of commands, the latter could be + killed with SIGPIPE. Instead we should ignore such event as a + non-error. + + * The commit log template given with "git merge --edit" did not have + a short instructive text like what "git commit" gives. + + * "git rev-list --verify-objects -q" omitted the extra verification + it needs to do over "git rev-list --objects -q" by mistake. + + * "gitweb" used to drop warnings in the log file when "heads" view is + accessed in a repository whose HEAD does not point at a valid + branch. + + * An invalid regular expression pattern given by an end user made + "gitweb" to return garbled response. + +Also contains minor fixes and documentation updates. diff --git a/Documentation/RelNotes/1.7.9.4.txt b/Documentation/RelNotes/1.7.9.4.txt new file mode 100644 index 0000000..e5217a1 --- /dev/null +++ b/Documentation/RelNotes/1.7.9.4.txt @@ -0,0 +1,24 @@ +Git v1.7.9.4 Release Notes +========================== + +Fixes since v1.7.9.3 +-------------------- + + * The code to synthesize the fake ancestor tree used by 3-way merge + fallback in "git am" was not prepared to read a patch created with + a non-standard -p<num> value. + + * "git bundle" did not record boundary commits correctly when there + are many of them. + + * "git diff-index" and its friends at the plumbing level showed the + "diff --git" header and nothing else for a path whose cached stat + info is dirty without actual difference when asked to produce a + patch. This was a longstanding bug that we could have fixed long + time ago. + + * "gitweb" did use quotemeta() to prepare search string when asked to + do a fixed-string project search, but did not use it by mistake and + used the user-supplied string instead. + +Also contains minor fixes and documentation updates. diff --git a/Documentation/RelNotes/1.7.9.5.txt b/Documentation/RelNotes/1.7.9.5.txt new file mode 100644 index 0000000..95cc2bb --- /dev/null +++ b/Documentation/RelNotes/1.7.9.5.txt @@ -0,0 +1,23 @@ +Git v1.7.9.5 Release Notes +========================== + +Fixes since v1.7.9.4 +-------------------- + + * When "git config" diagnoses an error in a configuration file and + shows the line number for the offending line, it miscounted if the + error was at the end of line. + + * "git fast-import" accepted "ls" command with an empty path by + mistake. + + * Various new-ish output decoration modes of "git grep" were not + documented in the manual's synopsis section. + + * The "remaining" subcommand to "git rerere" was not documented. + + * "gitweb" used to drop warnings in the log file when "heads" view is + accessed in a repository whose HEAD does not point at a valid + branch. + +Also contains minor fixes and documentation updates. diff --git a/Documentation/RelNotes/1.7.9.6.txt b/Documentation/RelNotes/1.7.9.6.txt new file mode 100644 index 0000000..74bf882 --- /dev/null +++ b/Documentation/RelNotes/1.7.9.6.txt @@ -0,0 +1,12 @@ +Git v1.7.9.6 Release Notes +========================== + +Fixes since v1.7.9.5 +-------------------- + + * "git merge $tag" to merge an annotated tag always opens the editor + during an interactive edit session. v1.7.10 series introduced an + environment variable GIT_MERGE_AUTOEDIT to help older scripts decline + this behaviour, but the maintenance track should also support it. + +Also contains minor fixes and documentation updates. diff --git a/Documentation/RelNotes/1.7.9.7.txt b/Documentation/RelNotes/1.7.9.7.txt new file mode 100644 index 0000000..59667d0 --- /dev/null +++ b/Documentation/RelNotes/1.7.9.7.txt @@ -0,0 +1,13 @@ +Git v1.7.9.7 Release Notes +========================== + +Fixes since v1.7.9.6 +-------------------- + + * An error message from 'git bundle' had an unmatched single quote pair in it. + + * The way 'git fetch' implemented its connectivity check over + received objects was overly pessimistic, and wasted a lot of + cycles. + +Also contains minor fixes and documentation updates. diff --git a/Documentation/RelNotes/1.7.9.txt b/Documentation/RelNotes/1.7.9.txt new file mode 100644 index 0000000..95320aa --- /dev/null +++ b/Documentation/RelNotes/1.7.9.txt @@ -0,0 +1,112 @@ +Git v1.7.9 Release Notes +======================== + +Updates since v1.7.8 +-------------------- + + * gitk updates accumulated since early 2011. + + * git-gui updated to 0.16.0. + + * git-p4 (in contrib/) updates. + + * Git uses gettext to translate its most common interface messages + into the user's language if translations are available and the + locale is appropriately set. Distributors can drop new PO files + in po/ to add new translations. + + * The code to handle username/password for HTTP transactions used in + "git push" & "git fetch" learned to talk "credential API" to + external programs to cache or store them, to allow integration with + platform native keychain mechanisms. + + * The input prompts in the terminal use our own getpass() replacement + when possible. HTTP transactions used to ask for the username without + echoing back what was typed, but with this change you will see it as + you type. + + * The internals of "revert/cherry-pick" have been tweaked to prepare + building more generic "sequencer" on top of the implementation that + drives them. + + * "git rev-parse FETCH_HEAD" after "git fetch" without specifying + what to fetch from the command line will now show the commit that + would be merged if the command were "git pull". + + * "git add" learned to stream large files directly into a packfile + instead of writing them into individual loose object files. + + * "git checkout -B <current branch> <elsewhere>" is a more intuitive + way to spell "git reset --keep <elsewhere>". + + * "git checkout" and "git merge" learned "--no-overwrite-ignore" option + to tell Git that untracked and ignored files are not expendable. + + * "git commit --amend" learned "--no-edit" option to say that the + user is amending the tree being recorded, without updating the + commit log message. + + * "git commit" and "git reset" re-learned the optimization to prime + the cache-tree information in the index, which makes it faster to + write a tree object out after the index entries are updated. + + * "git commit" detects and rejects an attempt to stuff NUL byte in + the commit log message. + + * "git commit" learned "-S" to GPG-sign the commit; this can be shown + with the "--show-signature" option to "git log". + + * fsck and prune are relatively lengthy operations that still go + silent while making the end-user wait. They learned to give progress + output like other slow operations. + + * The set of built-in function-header patterns for various languages + knows MATLAB. + + * "git log --format='<format>'" learned new %g[nNeE] specifiers to + show information from the reflog entries when walking the reflog + (i.e. with "-g"). + + * "git pull" can be used to fetch and merge an annotated/signed tag, + instead of the tip of a topic branch. The GPG signature from the + signed tag is recorded in the resulting merge commit for later + auditing. + + * "git log" learned "--show-signature" option to show the signed tag + that was merged that is embedded in the merge commit. It also can + show the signature made on the commit with "git commit -S". + + * "git branch --edit-description" can be used to add descriptive text + to explain what a topic branch is about. + + * "git fmt-merge-msg" learned to take the branch description into + account when preparing a merge summary that "git merge" records + when merging a local branch. + + * "git request-pull" has been updated to convey more information + useful for integrators to decide if a topic is worth merging and + what is pulled is indeed what the requestor asked to pull, + including: + + - the tip of the branch being requested to be merged; + - the branch description describing what the topic is about; + - the contents of the annotated tag, when requesting to pull a tag. + + * "git pull" learned to notice 'pull.rebase' configuration variable, + which serves as a global fallback for setting 'branch.<name>.rebase' + configuration variable per branch. + + * "git tag" learned "--cleanup" option to control how the whitespaces + and empty lines in tag message are cleaned up. + + * "gitweb" learned to show side-by-side diff. + +Also contains minor documentation updates and code clean-ups. + + +Fixes since v1.7.8 +------------------ + +Unless otherwise noted, all the fixes since v1.7.8 in the maintenance +releases are contained in this release (see release notes to them for +details). diff --git a/Documentation/RelNotes/1.8.0.1.txt b/Documentation/RelNotes/1.8.0.1.txt new file mode 100644 index 0000000..1f372fa --- /dev/null +++ b/Documentation/RelNotes/1.8.0.1.txt @@ -0,0 +1,64 @@ +Git v1.8.0.1 Release Notes +========================== + +Fixes since v1.8.0 +------------------ + + * The configuration parser had an unnecessary hardcoded limit on + variable names that was not checked consistently. + + * The "say" function in the test scaffolding incorrectly allowed + "echo" to interpret "\a" as if it were a C-string asking for a + BEL output. + + * "git mergetool" feeds /dev/null as a common ancestor when dealing + with an add/add conflict, but p4merge backend cannot handle + it. Work it around by passing a temporary empty file. + + * "git log -F -E --grep='<ere>'" failed to use the given <ere> + pattern as extended regular expression, and instead looked for the + string literally. + + * "git grep -e pattern <tree>" asked the attribute system to read + "<tree>:.gitattributes" file in the working tree, which was + nonsense. + + * A symbolic ref refs/heads/SYM was not correctly removed with "git + branch -d SYM"; the command removed the ref pointed by SYM + instead. + + * Earlier we fixed documentation to hyphenate "remote-tracking branch" + to clarify that these are not a remote entity, but unhyphenated + spelling snuck in to a few places since then. + + * "git pull --rebase" run while the HEAD is detached tried to find + the upstream branch of the detached HEAD (which by definition + does not exist) and emitted unnecessary error messages. + + * The refs/replace hierarchy was not mentioned in the + repository-layout docs. + + * Sometimes curl_multi_timeout() function suggested a wrong timeout + value when there is no file descriptors to wait on and the http + transport ended up sleeping for minutes in select(2) system call. + A workaround has been added for this. + + * Various rfc2047 quoting issues around a non-ASCII name on the + From: line in the output from format-patch have been corrected. + + * "git diff -G<pattern>" did not honor textconv filter when looking + for changes. + + * Bash completion script (in contrib/) did not correctly complete a + lazy "git checkout $name_of_remote_tracking_branch_that_is_unique" + command line. + + * RSS feed from "gitweb" had a xss hole in its title output. + + * "git config --path $key" segfaulted on "[section] key" (a boolean + "true" spelled without "=", not "[section] key = true"). + + * "git checkout -b foo" while on an unborn branch did not say + "Switched to a new branch 'foo'" like other cases. + +Also contains other minor fixes and documentation updates. diff --git a/Documentation/RelNotes/1.8.0.2.txt b/Documentation/RelNotes/1.8.0.2.txt new file mode 100644 index 0000000..8497e05 --- /dev/null +++ b/Documentation/RelNotes/1.8.0.2.txt @@ -0,0 +1,34 @@ +Git v1.8.0.2 Release Notes +========================== + +Fixes since v1.8.0.1 +-------------------- + + * Various codepaths have workaround for a common misconfiguration to + spell "UTF-8" as "utf8", but it was not used uniformly. Most + notably, mailinfo (which is used by "git am") lacked this support. + + * We failed to mention a file without any content change but whose + permission bit was modified, or (worse yet) a new file without any + content in the "git diff --stat" output. + + * When "--stat-count" hides a diffstat for binary contents, the total + number of added and removed lines at the bottom was computed + incorrectly. + + * When "--stat-count" hides a diffstat for unmerged paths, the total + number of affected files at the bottom of the "diff --stat" output + was computed incorrectly. + + * "diff --shortstat" miscounted the total number of affected files + when there were unmerged paths. + + * "git p4" used to try expanding malformed "$keyword$" that spans + across multiple lines. + + * "git update-ref -d --deref SYM" to delete a ref through a symbolic + ref that points to it did not remove it correctly. + + * Syntax highlighting in "gitweb" was not quite working. + +Also contains other minor fixes and documentation updates. diff --git a/Documentation/RelNotes/1.8.0.3.txt b/Documentation/RelNotes/1.8.0.3.txt new file mode 100644 index 0000000..92b1e4b --- /dev/null +++ b/Documentation/RelNotes/1.8.0.3.txt @@ -0,0 +1,14 @@ +Git v1.8.0.3 Release Notes +========================== + +Fixes since v1.8.0.2 +-------------------- + + * "git log -p -S<string>" did not apply the textconv filter while + looking for the <string>. + + * In the documentation, some invalid example e-mail addresses were + formatted into mailto: links. + +Also contains many documentation updates backported from the 'master' +branch that is preparing for the upcoming 1.8.1 release. diff --git a/Documentation/RelNotes/1.8.0.txt b/Documentation/RelNotes/1.8.0.txt new file mode 100644 index 0000000..43883c1 --- /dev/null +++ b/Documentation/RelNotes/1.8.0.txt @@ -0,0 +1,267 @@ +Git v1.8.0 Release Notes +======================== + +Backward compatibility notes +---------------------------- + +In the next major release (not *this* one), we will change the +behavior of the "git push" command. + +When "git push [$there]" does not say what to push, we have used the +traditional "matching" semantics so far (all your branches were sent +to the remote as long as there already are branches of the same name +over there). We will use the "simple" semantics that pushes the +current branch to the branch with the same name, only when the current +branch is set to integrate with that remote branch. There is a user +preference configuration variable "push.default" to change this, and +"git push" will warn about the upcoming change until you set this +variable in this release. + +"git branch --set-upstream" is deprecated and may be removed in a +relatively distant future. "git branch [-u|--set-upstream-to]" has +been introduced with a saner order of arguments. + + +Updates since v1.7.12 +--------------------- + +UI, Workflows & Features + + * A credential helper for Win32 to allow access to the keychain of + the logged-in user has been added. + + * An initial port to HP NonStop. + + * A credential helper to allow access to the Gnome keyring has been + added. + + * When "git am" sanitizes the "Subject:" line, we strip the prefix from + "Re: subject" and also from a less common "re: subject", but left + the even less common "RE: subject" intact. Now we strip that too. + + * It was tempting to say "git branch --set-upstream origin/master", + but that tells Git to arrange the local branch "origin/master" to + integrate with the currently checked out branch, which is highly + unlikely what the user meant. The option is deprecated; use the + new "--set-upstream-to" (with a short-and-sweet "-u") option + instead. + + * "git cherry-pick" learned the "--allow-empty-message" option to + allow it to replay a commit without any log message. + + * After "git cherry-pick -s" gave control back to the user asking + help to resolve conflicts, concluding "git commit" used to need to + be run with "-s" if the user wants to sign it off; now the command + leaves the sign-off line in the log template. + + * "git daemon" learned the "--access-hook" option to allow an + external command to decline service based on the client address, + repository path, etc. + + * "git difftool --dir-diff" learned to use symbolic links to prepare + a temporary copy of the working tree when available. + + * "git grep" learned to use a non-standard pattern type by default if + a configuration variable tells it to. + + * Accumulated updates to "git gui" has been merged. + + * "git log -g" learned the "--grep-reflog=<pattern>" option to limit + its output to commits with a reflog message that matches the given + pattern. + + * "git merge-base" learned the "--is-ancestor A B" option to tell if A is + an ancestor of B. The result is indicated by its exit status code. + + * "git mergetool" now allows users to override the actual command used + with the mergetool.$name.cmd configuration variable even for built-in + mergetool backends. + + * "git rebase -i" learned the "--edit-todo" option to open an editor + to edit the instruction sheet. + + +Foreign Interface + + * "git svn" has been updated to work with SVN 1.7. + + * "git p4" learned the "--conflicts" option to specify what to do when + encountering a conflict during "p4 submit". + + +Performance, Internal Implementation, etc. + + * Git ships with a fall-back regexp implementation for platforms with + buggy regexp library, but it was easy for people to keep using their + platform regexp by mistake. A new test has been added to check this. + + * The "check-docs" build target has been updated and greatly + simplified. + + * The test suite is run under MALLOC_CHECK_ when running with a glibc + that supports the feature. + + * The documentation in the TeXinfo format was using indented output + for materials meant to be examples that are better typeset in + monospace. + + * Compatibility wrapper around some mkdir(2) implementations that + reject parameters with trailing slash has been introduced. + + * Compatibility wrapper for systems that lack usable setitimer() has + been added. + + * The option parsing of "git checkout" had error checking, dwim and + defaulting missing options, all mixed in the code, and issuing an + appropriate error message with useful context was getting harder. + The code has been reorganized to allow giving a proper diagnosis + when the user says "git checkout -b -t foo bar" (e.g. "-t" is not a + good name for a branch). + + * Many internal uses of a "git merge-base" equivalent were only to see + if one commit fast-forwards to the other, which did not need the + full set of merge bases to be computed. They have been updated to + use less expensive checks. + + * The heuristics to detect and silently convert latin1 to utf8 when + we were told to use utf-8 in the log message has been transplanted + from "mailinfo" to "commit" and "commit-tree". + + * Messages given by "git <subcommand> -h" from many subcommands have + been marked for translation. + + +Also contains minor documentation updates and code clean-ups. + + +Fixes since v1.7.12 +------------------- + +Unless otherwise noted, all the fixes since v1.7.12 in the +maintenance track are contained in this release (see release notes +to them for details). + + * The attribute system may be asked for a path that itself or its + leading directories no longer exists in the working tree, and it is + fine if we cannot open .gitattribute file in such a case. Failure + to open per-directory .gitattributes with error status other than + ENOENT and ENOTDIR should be diagnosed, but it wasn't. + + * When looking for $HOME/.gitconfig etc., it is OK if we cannot read + them because they do not exist, but we did not diagnose existing + files that we cannot read. + + * When "git am" is fed an input that has multiple "Content-type: ..." + header, it did not grok charset= attribute correctly. + + * "git am" mishandled a patch attached as application/octet-stream + (e.g. not text/*); Content-Transfer-Encoding (e.g. base64) was not + honored correctly. + + * "git blame MAKEFILE" run in a history that has "Makefile" but not + "MAKEFILE" should say "No such file MAKEFILE in HEAD", but got + confused on a case insensitive filesystem and failed to do so. + + * Even during a conflicted merge, "git blame $path" always meant to + blame uncommitted changes to the "working tree" version; make it + more useful by showing cleanly merged parts as coming from the other + branch that is being merged. + + * It was unclear in the documentation for "git blame" that it is + unnecessary for users to use the "--follow" option. + + * Output from "git branch -v" contains "(no branch)" that could be + localized, but the code to align it along with the names of + branches was counting in bytes, not in display columns. + + * "git cherry-pick A C B" used to replay changes in A and then B and + then C if these three commits had committer timestamps in that + order, which is not what the user who said "A C B" naturally + expects. + + * A repository created with "git clone --single" had its fetch + refspecs set up just like a clone without "--single", leading the + subsequent "git fetch" to slurp all the other branches, defeating + the whole point of specifying "only this branch". + + * Documentation talked about "first line of commit log" when it meant + the title of the commit. The description was clarified by defining + how the title is decided and rewording the casual mention of "first + line" to "title". + + * "git cvsimport" did not thoroughly cleanse tag names that it + inferred from the names of the tags it obtained from CVS, which + caused "git tag" to barf and stop the import in the middle. + + * Earlier we made the diffstat summary line that shows the number of + lines added/deleted localizable, but it was found irritating having + to see them in various languages on a list whose discussion language + is English, and this change has been reverted. + + * "git fetch --all", when passed "--no-tags", did not honor the + "--no-tags" option while fetching from individual remotes (the same + issue existed with "--tags", but the combination "--all --tags" makes + much less sense than "--all --no-tags"). + + * "git fetch" over http had an old workaround for an unlikely server + misconfiguration; it turns out that this hurts debuggability of the + configuration in general, and has been reverted. + + * "git fetch" over http advertised that it supports "deflate", which + is much less common, and did not advertise the more common "gzip" on + its Accept-Encoding header. + + * "git fetch" over the dumb-http revision walker could segfault when + curl's multi interface was used. + + * "git gc --auto" notified the user that auto-packing has triggered + even under the "--quiet" option. + + * After "gitk" showed the contents of a tag, neither "Reread + references" nor "Reload" updated what is shown as the + contents of it when the user overwrote the tag with "git tag -f". + + * "git log --all-match --grep=A --grep=B" ought to show commits that + mention both A and B, but when these three options are used with + --author or --committer, it showed commits that mention either A or + B (or both) instead. + + * The "-Xours" backend option to "git merge -s recursive" was ignored + for binary files. + + * "git p4", when "--use-client-spec" and "--detect-branches" are used + together, misdetected branches. + + * "git receive-pack" (the counterpart to "git push") did not give + progress output while processing objects it received to the puser + when run over the smart-http protocol. + + * When you misspell the command name you give to the "exec" action in + the "git rebase -i" instruction sheet you were told that 'rebase' is not a + git subcommand from "git rebase --continue". + + * The subcommand in "git remote" to remove a defined remote was + "rm" and the command did not take a fully-spelled "remove". + + * The interactive prompt that "git send-email" gives was error prone. It + asked "What e-mail address do you want to use?" with the address it + guessed (correctly) the user would want to use in its prompt, + tempting the user to say "y". But the response was taken as "No, + please use 'y' as the e-mail address instead", which is most + certainly not what the user meant. + + * "git show --format='%ci'" did not give the timestamp correctly for + commits created without human readable name on the "committer" line. + + * "git show --quiet" ought to be a synonym for "git show -s", but + wasn't. + + * "git submodule frotz" was not diagnosed as "frotz" being an unknown + subcommand to "git submodule"; the user instead got a complaint + that "git submodule status" was run with an unknown path "frotz". + + * "git status" honored the ignore=dirty settings in .gitmodules but + "git commit" didn't. + + * "gitweb" did not give the correct committer timezone in its feed + output due to a typo. diff --git a/Documentation/RelNotes/1.8.1.1.txt b/Documentation/RelNotes/1.8.1.1.txt new file mode 100644 index 0000000..6cde07b --- /dev/null +++ b/Documentation/RelNotes/1.8.1.1.txt @@ -0,0 +1,87 @@ +Git 1.8.1.1 Release Notes +========================= + +Fixes since v1.8.1 +------------------ + + * The attribute mechanism didn't allow limiting attributes to be + applied to only a single directory itself with "path/" like the + exclude mechanism does. + + * When attempting to read the XDG-style $HOME/.config/git/config and + finding that $HOME/.config/git is a file, we gave a wrong error + message, instead of treating the case as "a custom config file does + not exist there" and moving on. + + * After failing to create a temporary file using mkstemp(), failing + pathname was not reported correctly on some platforms. + + * http transport was wrong to ask for the username when the + authentication is done by certificate identity. + + * The behaviour visible to the end users was confusing, when they + attempt to kill a process spawned in the editor that was in turn + launched by Git with SIGINT (or SIGQUIT), as Git would catch that + signal and die. We ignore these signals now. + + * A child process that was killed by a signal (e.g. SIGINT) was + reported in an inconsistent way depending on how the process was + spawned by us, with or without a shell in between. + + * After "git add -N" and then writing a tree object out of the + index, the cache-tree data structure got corrupted. + + * "git apply" misbehaved when fixing whitespace breakages by removing + excess trailing blank lines in some corner cases. + + * A tar archive created by "git archive" recorded a directory in a + way that made NetBSD's implementation of "tar" sometimes unhappy. + + * When "git clone --separate-git-dir=$over_there" is interrupted, it + failed to remove the real location of the $GIT_DIR it created. + This was most visible when interrupting a submodule update. + + * "git fetch --mirror" and fetch that uses other forms of refspec + with wildcard used to attempt to update a symbolic ref that match + the wildcard on the receiving end, which made little sense (the + real ref that is pointed at by the symbolic ref would be updated + anyway). Symbolic refs no longer are affected by such a fetch. + + * The "log --graph" codepath fell into infinite loop in some + corner cases. + + * "git merge" started calling prepare-commit-msg hook like "git + commit" does some time ago, but forgot to pay attention to the exit + status of the hook. + + * "git pack-refs" that ran in parallel to another process that + created new refs had a race that can lose new ones. + + * When a line to be wrapped has a solid run of non space characters + whose length exactly is the wrap width, "git shortlog -w" failed + to add a newline after such a line. + + * The way "git svn" asked for password using SSH_ASKPASS and + GIT_ASKPASS was not in line with the rest of the system. + + * "gitweb", when sorting by age to show repositories with new + activities first, used to sort repositories with absolutely + nothing in it early, which was not very useful. + + * "gitweb", when sorting by age to show repositories with new + activities first, used to sort repositories with absolutely + nothing in it early, which was not very useful. + + * When autoconf is used, any build on a different commit always ran + "config.status --recheck" even when unnecessary. + + * Some scripted programs written in Python did not get updated when + PYTHON_PATH changed. + + * We have been carrying a translated and long-unmaintained copy of an + old version of the tutorial; removed. + + * Portability issues in many self-test scripts have been addressed. + + +Also contains other minor fixes and documentation updates. diff --git a/Documentation/RelNotes/1.8.1.2.txt b/Documentation/RelNotes/1.8.1.2.txt new file mode 100644 index 0000000..5ab7b18 --- /dev/null +++ b/Documentation/RelNotes/1.8.1.2.txt @@ -0,0 +1,25 @@ +Git 1.8.1.2 Release Notes +========================= + +Fixes since v1.8.1.1 +-------------------- + + * An element on GIT_CEILING_DIRECTORIES list that does not name the + real path to a directory (i.e. a symbolic link) could have caused + the GIT_DIR discovery logic to escape the ceiling. + + * Command line completion for "tcsh" emitted an unwanted space + after completing a single directory name. + + * Command line completion leaked an unnecessary error message while + looking for possible matches with paths in <tree-ish>. + + * "git archive" did not record uncompressed size in the header when + streaming a zip archive, which confused some implementations of unzip. + + * When users spelled "cc:" in lowercase in the fake "header" in the + trailer part, "git send-email" failed to pick up the addresses from + there. As e-mail headers field names are case insensitive, this + script should follow suit and treat "cc:" and "Cc:" the same way. + +Also contains various documentation fixes. diff --git a/Documentation/RelNotes/1.8.1.3.txt b/Documentation/RelNotes/1.8.1.3.txt new file mode 100644 index 0000000..681cb35 --- /dev/null +++ b/Documentation/RelNotes/1.8.1.3.txt @@ -0,0 +1,47 @@ +Git 1.8.1.3 Release Notes +========================= + +Fixes since v1.8.1.2 +-------------------- + + * The attribute mechanism didn't allow limiting attributes to be + applied to only a single directory itself with "path/" like the + exclude mechanism does. The fix for this in 1.8.1.2 had + performance degradations. + + * Command line completion code was inadvertently made incompatible with + older versions of bash by using a newer array notation. + + * Scripts to test bash completion was inherently flaky as it was + affected by whatever random things the user may have on $PATH. + + * A fix was added to the build procedure to work around buggy + versions of ccache broke the auto-generation of dependencies, which + unfortunately is still relevant because some people use ancient + distros. + + * We used to stuff "user@" and then append what we read from + /etc/mailname to come up with a default e-mail ident, but a bug + lost the "user@" part. + + * "git am" did not parse datestamp correctly from Hg generated patch, + when it is run in a locale outside C (or en). + + * Attempt to "branch --edit-description" an existing branch, while + being on a detached HEAD, errored out. + + * "git cherry-pick" did not replay a root commit to an unborn branch. + + * We forgot to close the file descriptor reading from "gpg" output, + killing "git log --show-signature" on a long history. + + * "git rebase --preserve-merges" lost empty merges in recent versions + of Git. + + * Rebasing the history of superproject with change in the submodule + has been broken since v1.7.12. + + * A failure to push due to non-ff while on an unborn branch + dereferenced a NULL pointer when showing an error message. + +Also contains various documentation fixes. diff --git a/Documentation/RelNotes/1.8.1.4.txt b/Documentation/RelNotes/1.8.1.4.txt new file mode 100644 index 0000000..22af1d1 --- /dev/null +++ b/Documentation/RelNotes/1.8.1.4.txt @@ -0,0 +1,11 @@ +Git 1.8.1.4 Release Notes +========================= + +Fixes since v1.8.1.3 +-------------------- + + * "git imap-send" talking over imaps:// did make sure it received a + valid certificate from the other end, but did not check if the + certificate matched the host it thought it was talking to. + +Also contains various documentation fixes. diff --git a/Documentation/RelNotes/1.8.1.5.txt b/Documentation/RelNotes/1.8.1.5.txt new file mode 100644 index 0000000..efa68ae --- /dev/null +++ b/Documentation/RelNotes/1.8.1.5.txt @@ -0,0 +1,47 @@ +Git 1.8.1.5 Release Notes +========================= + +Fixes since v1.8.1.4 +-------------------- + + * Given a string with a multi-byte character that begins with '-' on + the command line where an option is expected, the option parser + used just one byte of the unknown letter when reporting an error. + + * In v1.8.1, the attribute parser was tightened too restrictive to + error out upon seeing an entry that begins with an ! (exclamation), + which may confuse users to expect a "negative match", which does + not exist. This has been demoted to a warning; such an entry is + still ignored. + + * "git apply --summary" has been taught to make sure the similarity + value shown in its output is sensible, even when the input had a + bogus value. + + * "git clean" showed what it was going to do, but sometimes ended + up finding that it was not allowed to do so, which resulted in a + confusing output (e.g. after saying that it will remove an + untracked directory, it found an embedded git repository there + which it is not allowed to remove). It now performs the actions + and then reports the outcome more faithfully. + + * "git clone" used to allow --bare and --separate-git-dir=$there + options at the same time, which was nonsensical. + + * "git cvsimport" mishandled timestamps at DST boundary. + + * We used to have an arbitrary 32 limit for combined diff input, + resulting in incorrect number of leading colons shown when showing + the "--raw --cc" output. + + * The smart HTTP clients forgot to verify the content-type that comes + back from the server side to make sure that the request is being + handled properly. + + * "git help remote-helpers" failed to find the documentation. + + * "gitweb" pages served over HTTPS, when configured to show picon or + gravatar, referred to these external resources to be fetched via + HTTP, resulting in mixed contents warning in browsers. + +Also contains various documentation fixes. diff --git a/Documentation/RelNotes/1.8.1.6.txt b/Documentation/RelNotes/1.8.1.6.txt new file mode 100644 index 0000000..c15cf2e --- /dev/null +++ b/Documentation/RelNotes/1.8.1.6.txt @@ -0,0 +1,39 @@ +Git 1.8.1.6 Release Notes +========================= + +Fixes since v1.8.1.5 +-------------------- + + * An earlier change to the attribute system introduced at v1.8.1.2 by + mistake stopped a pattern "dir" (without trailing slash) from + matching a directory "dir" (it only wanted to allow pattern "dir/" + to also match). + + * The code to keep track of what directory names are known to Git on + platforms with case insensitive filesystems can get confused upon a + hash collision between these pathnames and looped forever. + + * When the "--prefix" option is used to "checkout-index", the code + did not pick the correct output filter based on the attribute + setting. + + * Annotated tags outside refs/tags/ hierarchy were not advertised + correctly to the ls-remote and fetch with recent version of Git. + + * The logic used by "git diff -M --stat" to shorten the names of + files before and after a rename did not work correctly when the + common prefix and suffix between the two filenames overlapped. + + * "git update-index -h" did not do the usual "-h(elp)" thing. + + * perl/Git.pm::cat_blob slurped everything in core only to write it + out to a file descriptor, which was not a very smart thing to do. + + * The SSL peer verification done by "git imap-send" did not ask for + Server Name Indication (RFC 4366), failing to connect SSL/TLS + sites that serve multiple hostnames on a single IP. + + * "git bundle verify" did not say "records a complete history" for a + bundle that does not have any prerequisites. + +Also contains various documentation fixes. diff --git a/Documentation/RelNotes/1.8.1.txt b/Documentation/RelNotes/1.8.1.txt new file mode 100644 index 0000000..d6f9555 --- /dev/null +++ b/Documentation/RelNotes/1.8.1.txt @@ -0,0 +1,241 @@ +Git v1.8.1 Release Notes +======================== + +Backward compatibility notes +---------------------------- + +In the next major release (not *this* one), we will change the +behavior of the "git push" command. + +When "git push [$there]" does not say what to push, we have used the +traditional "matching" semantics so far (all your branches were sent +to the remote as long as there already are branches of the same name +over there). We will use the "simple" semantics that pushes the +current branch to the branch with the same name, only when the current +branch is set to integrate with that remote branch. There is a user +preference configuration variable "push.default" to change this, and +"git push" will warn about the upcoming change until you set this +variable in this release. + +"git branch --set-upstream" is deprecated and may be removed in a +relatively distant future. "git branch [-u|--set-upstream-to]" has +been introduced with a saner order of arguments to replace it. + + +Updates since v1.8.0 +-------------------- + +UI, Workflows & Features + + * Command-line completion scripts for tcsh and zsh have been added. + + * "git-prompt" scriptlet (in contrib/completion) can be told to paint + pieces of the hints in the prompt string in colors. + + * Some documentation pages that used to ship only in the plain text + format are now formatted in HTML as well. + + * We used to have a workaround for a bug in ancient "less" that + causes it to exit without any output when the terminal is resized. + The bug has been fixed in "less" version 406 (June 2007), and the + workaround has been removed in this release. + + * When "git checkout" checks out a branch, it tells the user how far + behind (or ahead) the new branch is relative to the remote tracking + branch it builds upon. The message now also advises how to sync + them up by pushing or pulling. This can be disabled with the + advice.statusHints configuration variable. + + * "git config --get" used to diagnose presence of multiple + definitions of the same variable in the same configuration file as + an error, but it now applies the "last one wins" rule used by the + internal configuration logic. Strictly speaking, this may be an + API regression but it is expected that nobody will notice it in + practice. + + * A new configuration variable "diff.context" can be used to + give the default number of context lines in the patch output, to + override the hardcoded default of 3 lines. + + * "git format-patch" learned the "--notes=<ref>" option to give + notes for the commit after the three-dash lines in its output. + + * "git log -p -S<string>" now looks for the <string> after applying + the textconv filter (if defined); earlier it inspected the contents + of the blobs without filtering. + + * "git log --grep=<pcre>" learned to honor the "grep.patterntype" + configuration set to "perl". + + * "git replace -d <object>" now interprets <object> as an extended + SHA-1 (e.g. HEAD~4 is allowed), instead of only accepting full hex + object name. + + * "git rm $submodule" used to punt on removing a submodule working + tree to avoid losing the repository embedded in it. Because + recent git uses a mechanism to separate the submodule repository + from the submodule working tree, "git rm" learned to detect this + case and removes the submodule working tree when it is safe to do so. + + * "git send-email" used to prompt for the sender address, even when + the committer identity is well specified (e.g. via user.name and + user.email configuration variables). The command no longer gives + this prompt when not necessary. + + * "git send-email" did not allow non-address garbage strings to + appear after addresses on Cc: lines in the patch files (and when + told to pick them up to find more recipients), e.g. + + Cc: Stable Kernel <stable@k.org> # for v3.2 and up + + The command now strips " # for v3.2 and up" part before adding the + remainder of this line to the list of recipients. + + * "git submodule add" learned to add a new submodule at the same + path as the path where an unrelated submodule was bound to in an + existing revision via the "--name" option. + + * "git submodule sync" learned the "--recursive" option. + + * "diff.submodule" configuration variable can be used to give custom + default value to the "git diff --submodule" option. + + * "git symbolic-ref" learned the "-d $symref" option to delete the + named symbolic ref, which is more intuitive way to spell it than + "update-ref -d --no-deref $symref". + + +Foreign Interface + + * "git cvsimport" can be told to record timezones (other than GMT) + per-author via its author info file. + + * The remote helper interface to interact with subversion + repositories (one of the GSoC 2012 projects) has been merged. + + * A new remote-helper interface for Mercurial has been added to + contrib/remote-helpers. + + * The documentation for git(1) was pointing at a page at an external + site for the list of authors that no longer existed. The link has + been updated to point at an alternative site. + + +Performance, Internal Implementation, etc. + + * Compilation on Cygwin with newer header files are supported now. + + * A couple of low-level implementation updates on MinGW. + + * The logic to generate the initial advertisement from "upload-pack" + (i.e. what is invoked by "git fetch" on the other side of the + connection) to list what refs are available in the repository has + been optimized. + + * The logic to find set of attributes that match a given path has + been optimized. + + * Use preloadindex in "git diff-index" and "git update-index", which + has a nice speedup on systems with slow stat calls (and even on + Linux). + + +Also contains minor documentation updates and code clean-ups. + + +Fixes since v1.8.0 +------------------ + +Unless otherwise noted, all the fixes since v1.8.0 in the maintenance +track are contained in this release (see release notes to them for +details). + + * The configuration parser had an unnecessary hardcoded limit on + variable names that was not checked consistently. + + * The "say" function in the test scaffolding incorrectly allowed + "echo" to interpret "\a" as if it were a C-string asking for a + BEL output. + + * "git mergetool" feeds /dev/null as a common ancestor when dealing + with an add/add conflict, but p4merge backend cannot handle + it. Work it around by passing a temporary empty file. + + * "git log -F -E --grep='<ere>'" failed to use the given <ere> + pattern as extended regular expression, and instead looked for the + string literally. + + * "git grep -e pattern <tree>" asked the attribute system to read + "<tree>:.gitattributes" file in the working tree, which was + nonsense. + + * A symbolic ref refs/heads/SYM was not correctly removed with "git + branch -d SYM"; the command removed the ref pointed by SYM + instead. + + * Update "remote tracking branch" in the documentation to + "remote-tracking branch". + + * "git pull --rebase" run while the HEAD is detached tried to find + the upstream branch of the detached HEAD (which by definition + does not exist) and emitted unnecessary error messages. + + * The refs/replace hierarchy was not mentioned in the + repository-layout docs. + + * Various rfc2047 quoting issues around a non-ASCII name on the + From: line in the output from format-patch have been corrected. + + * Sometimes curl_multi_timeout() function suggested a wrong timeout + value when there is no file descriptor to wait on and the http + transport ended up sleeping for minutes in select(2) system call. + A workaround has been added for this. + + * For a fetch refspec (or the result of applying wildcard on one), + we always want the RHS to map to something inside "refs/" + hierarchy, but the logic to check it was not exactly right. + (merge 5c08c1f jc/maint-fetch-tighten-refname-check later to maint). + + * "git diff -G<pattern>" did not honor textconv filter when looking + for changes. + + * Some HTTP servers ask for auth only during the actual packing phase + (not in ls-remote phase); this is not really a recommended + configuration, but the clients used to fail to authenticate with + such servers. + (merge 2e736fd jk/maint-http-half-auth-fetch later to maint). + + * "git p4" used to try expanding malformed "$keyword$" that spans + across multiple lines. + + * Syntax highlighting in "gitweb" was not quite working. + + * RSS feed from "gitweb" had a xss hole in its title output. + + * "git config --path $key" segfaulted on "[section] key" (a boolean + "true" spelled without "=", not "[section] key = true"). + + * "git checkout -b foo" while on an unborn branch did not say + "Switched to a new branch 'foo'" like other cases. + + * Various codepaths have workaround for a common misconfiguration to + spell "UTF-8" as "utf8", but it was not used uniformly. Most + notably, mailinfo (which is used by "git am") lacked this support. + + * We failed to mention a file without any content change but whose + permission bit was modified, or (worse yet) a new file without any + content in the "git diff --stat" output. + + * When "--stat-count" hides a diffstat for binary contents, the total + number of added and removed lines at the bottom was computed + incorrectly. + + * When "--stat-count" hides a diffstat for unmerged paths, the total + number of affected files at the bottom of the "diff --stat" output + was computed incorrectly. + + * "diff --shortstat" miscounted the total number of affected files + when there were unmerged paths. + + * "update-ref -d --deref SYM" to delete a ref through a symbolic ref + that points to it did not remove it correctly. diff --git a/Documentation/RelNotes/1.8.2.1.txt b/Documentation/RelNotes/1.8.2.1.txt new file mode 100644 index 0000000..769a6fc --- /dev/null +++ b/Documentation/RelNotes/1.8.2.1.txt @@ -0,0 +1,115 @@ +Git v1.8.2.1 Release Notes +========================== + +Fixes since v1.8.2 +------------------ + + * An earlier change to the attribute system introduced at v1.8.1.2 by + mistake stopped a pattern "dir" (without trailing slash) from + matching a directory "dir" (it only wanted to allow pattern "dir/" + to also match). + + * Verification of signed tags were not done correctly when not in C + or en/US locale. + + * 'git commit -m "$msg"' used to add an extra newline even when + $msg already ended with one. + + * The "--match=<pattern>" option of "git describe", when used with + "--all" to allow refs that are not annotated tags to be used as a + base of description, did not restrict the output from the command + to those that match the given pattern. + + * An aliased command spawned from a bare repository that does not say + it is bare with "core.bare = yes" is treated as non-bare by mistake. + + * When "format-patch" quoted a non-ascii strings on the header files, + it incorrectly applied rfc2047 and chopped a single character in + the middle of it. + + * "git archive" reports a failure when asked to create an archive out + of an empty tree. It would be more intuitive to give an empty + archive back in such a case. + + * "git tag -f <tag>" always said "Updated tag '<tag>'" even when + creating a new tag (i.e. not overwriting nor updating). + + * "git cmd -- ':(top'" was not diagnosed as an invalid syntax, and + instead the parser kept reading beyond the end of the string. + + * Annotated tags outside refs/tags/ hierarchy were not advertised + correctly to the ls-remote and fetch with recent version of Git. + + * The code to keep track of what directory names are known to Git on + platforms with case insensitive filesystems can get confused upon a + hash collision between these pathnames and looped forever. + + * The logic used by "git diff -M --stat" to shorten the names of + files before and after a rename did not work correctly when the + common prefix and suffix between the two filenames overlapped. + + * "git submodule update", when recursed into sub-submodules, did not + accumulate the prefix paths. + + * "git am $maildir/" applied messages in an unexpected order; sort + filenames read from the maildir/ in a way that is more likely to + sort messages in the order the writing MUA meant to, by sorting + numeric segment in numeric order and non-numeric segment in + alphabetical order. + + * When export-subst is used, "zip" output recorded incorrect + size of the file. + + * Some platforms and users spell UTF-8 differently; retry with the + most official "UTF-8" when the system does not understand the + user-supplied encoding name that are the common alternative + spellings of UTF-8. + + * "git branch" did not bother to check nonsense command line + parameters and issue errors in many cases. + + * "git update-index -h" did not do the usual "-h(elp)" thing. + + * perl/Git.pm::cat_blob slurped everything in core only to write it + out to a file descriptor, which was not a very smart thing to do. + + * The SSL peer verification done by "git imap-send" did not ask for + Server Name Indication (RFC 4366), failing to connect SSL/TLS + sites that serve multiple hostnames on a single IP. + + * "git index-pack" had a buffer-overflow while preparing an + informational message when the translated version of it was too + long. + + * Clarify in the documentation "what" gets pushed to "where" when the + command line to "git push" does not say these explicitly. + + * In "git reflog expire", REACHABLE bit was not cleared from the + correct objects. + + * The "--color=<when>" argument to the commands in the diff family + was described poorly. + + * The arguments given to pre-rebase hook were not documented. + + * The v4 index format was not documented. + + * The "--match=<pattern>" argument "git describe" takes uses glob + pattern but it wasn't obvious from the documentation. + + * Some sources failed to compile on systems that lack NI_MAXHOST in + their system header (e.g. z/OS). + + * Add an example use of "--env-filter" in "filter-branch" + documentation. + + * "git bundle verify" did not say "records a complete history" for a + bundle that does not have any prerequisites. + + * In the v1.8.0 era, we changed symbols that do not have to be global + to file scope static, but a few functions in graph.c were used by + CGit from sideways bypassing the entry points of the API the + in-tree users use. + + * "git merge-tree" had a typo in the logic to detect d/f conflicts, + which caused it to segfault in some cases. diff --git a/Documentation/RelNotes/1.8.2.2.txt b/Documentation/RelNotes/1.8.2.2.txt new file mode 100644 index 0000000..708df1a --- /dev/null +++ b/Documentation/RelNotes/1.8.2.2.txt @@ -0,0 +1,61 @@ +Git v1.8.2.2 Release Notes +========================== + +Fixes since v1.8.2.1 +-------------------- + + * Zsh completion forgot that '%' character used to signal untracked + files needs to be escaped with another '%'. + + * A commit object whose author or committer ident are malformed + crashed some code that trusted that a name, an email and an + timestamp can always be found in it. + + * The new core.commentchar configuration was not applied to a few + places. + + * "git pull --rebase" did not pass "-v/-q" options to underlying + "git rebase". + + * When receive-pack detects error in the pack header it received in + order to decide which of unpack-objects or index-pack to run, it + returned without closing the error stream, which led to a hang + sideband thread. + + * "git diff --diff-algorithm=algo" was understood by the command line + parser, but "git diff --diff-algorithm algo" was not. + + * "git log -S/-G" started paying attention to textconv filter, but + there was no way to disable this. Make it honor --no-textconv + option. + + * "git merge $(git rev-parse v1.8.2)" behaved quite differently from + "git merge v1.8.2", as if v1.8.2 were written as v1.8.2^0 and did + not pay much attention to the annotated tag payload. Make the code + notice the type of the tag object, in addition to the dwim_ref() + based classification the current code uses (i.e. the name appears + in refs/tags/) to decide when to special case merging of tags. + + * "git cherry-pick" and "git revert" can take more than one commit + on the command line these days, but it was not mentioned on the usage + text. + + * Perl scripts like "git-svn" closed (not redirecting to /dev/null) + the standard error stream, which is not a very smart thing to do. + Later open may return file descriptor #2 for unrelated purpose, and + error reporting code may write into them. + + * "git apply --whitespace=fix" was not prepared to see a line getting + longer after fixing whitespaces (e.g. tab-in-indent aka Python). + + * "git diff/log --cc" did not work well with options that ignore + whitespace changes. + + * Documentation on setting up a http server that requires + authentication only on the push but not fetch has been clarified. + + * A few bugfixes to "git rerere" working on corner case merge + conflicts have been applied. + + * "git bundle" did not like a bundle created using a commit without + any message as its one of the prerequisites. diff --git a/Documentation/RelNotes/1.8.2.3.txt b/Documentation/RelNotes/1.8.2.3.txt new file mode 100644 index 0000000..6139482 --- /dev/null +++ b/Documentation/RelNotes/1.8.2.3.txt @@ -0,0 +1,19 @@ +Git v1.8.2.3 Release Notes +========================== + +Fixes since v1.8.2.2 +-------------------- + + * "rev-list --stdin" and friends kept bogus pointers into the input + buffer around as human readable object names. This was not a + huge problem but was exposed by a new change that uses these + names in error output. + + * When "git difftool" drove "kdiff3", it mistakenly passed --auto + option that was meant while resolving merge conflicts. + + * "git remote add" command did not diagnose extra command line + arguments as an error and silently ignored them. + +Also contains a handful of trivial code clean-ups, documentation +updates, updates to the test suite, etc. diff --git a/Documentation/RelNotes/1.8.2.txt b/Documentation/RelNotes/1.8.2.txt new file mode 100644 index 0000000..fc606ae --- /dev/null +++ b/Documentation/RelNotes/1.8.2.txt @@ -0,0 +1,495 @@ +Git v1.8.2 Release Notes +======================== + +Backward compatibility notes (this release) +------------------------------------------- + +"git push $there tag v1.2.3" used to allow replacing a tag v1.2.3 +that already exists in the repository $there, if the rewritten tag +you are pushing points at a commit that is a descendant of a commit +that the old tag v1.2.3 points at. This was found to be error prone +and starting with this release, any attempt to update an existing +ref under refs/tags/ hierarchy will fail, without "--force". + +When "git add -u" and "git add -A" that does not specify what paths +to add on the command line is run from inside a subdirectory, the +scope of the operation has always been limited to the subdirectory. +Many users found this counter-intuitive, given that "git commit -a" +and other commands operate on the entire tree regardless of where you +are. In this release, these commands give a warning message that +suggests the users to use "git add -u/-A ." when they want to limit +the scope to the current directory; doing so will squelch the message, +while training their fingers. + + +Backward compatibility notes (for Git 2.0) +------------------------------------------ + +When "git push [$there]" does not say what to push, we have used the +traditional "matching" semantics so far (all your branches were sent +to the remote as long as there already are branches of the same name +over there). In Git 2.0, the default will change to the "simple" +semantics that pushes the current branch to the branch with the same +name, only when the current branch is set to integrate with that +remote branch. There is a user preference configuration variable +"push.default" to change this. If you are an old-timer who is used +to the "matching" semantics, you can set it to "matching" to keep the +traditional behaviour. If you want to live in the future early, +you can set it to "simple" today without waiting for Git 2.0. + +When "git add -u" and "git add -A", that does not specify what paths +to add on the command line is run from inside a subdirectory, these +commands will operate on the entire tree in Git 2.0 for consistency +with "git commit -a" and other commands. Because there will be no +mechanism to make "git add -u" behave as if "git add -u .", it is +important for those who are used to "git add -u" (without pathspec) +updating the index only for paths in the current subdirectory to start +training their fingers to explicitly say "git add -u ." when they mean +it before Git 2.0 comes. + + +Updates since v1.8.1 +-------------------- + +UI, Workflows & Features + + * Initial ports to QNX and z/OS UNIX System Services have started. + + * Output from the tests is coloured using "green is okay, yellow is + questionable, red is bad and blue is informative" scheme. + + * Mention of "GIT/Git/git" in the documentation have been updated to + be more uniform and consistent. The name of the system and the + concept it embodies is "Git"; the command the users type is "git". + All-caps "GIT" was merely a way to imitate "Git" typeset in small + caps in our ASCII text only documentation and to be avoided. + + * The completion script (in contrib/completion) used to let the + default completer to suggest pathnames, which gave too many + irrelevant choices (e.g. "git add" would not want to add an + unmodified path). It learnt to use a more git-aware logic to + enumerate only relevant ones. + + * In bare repositories, "git shortlog" and other commands now read + mailmap files from the tip of the history, to help running these + tools in server settings. + + * Color specifiers, e.g. "%C(blue)Hello%C(reset)", used in the + "--format=" option of "git log" and friends can be disabled when + the output is not sent to a terminal by prefixing them with + "auto,", e.g. "%C(auto,blue)Hello%C(auto,reset)". + + * Scripts can ask Git that wildcard patterns in pathspecs they give do + not have any significance, i.e. take them as literal strings. + + * The patterns in .gitignore and .gitattributes files can have **/, + as a pattern that matches 0 or more levels of subdirectory. + E.g. "foo/**/bar" matches "bar" in "foo" itself or in a + subdirectory of "foo". + + * When giving arguments without "--" disambiguation, object names + that come earlier on the command line must not be interpretable as + pathspecs and pathspecs that come later on the command line must + not be interpretable as object names. This disambiguation rule has + been tweaked so that ":/" (no other string before or after) is + always interpreted as a pathspec; "git cmd -- :/" is no longer + needed, you can just say "git cmd :/". + + * Various "hint" lines Git gives when it asks the user to edit + messages in the editor are commented out with '#' by default. The + core.commentchar configuration variable can be used to customize + this '#' to a different character. + + * "git add -u" and "git add -A" without pathspec issues warning to + make users aware that they are only operating on paths inside the + subdirectory they are in. Use ":/" (everything from the top) or + "." (everything from the $cwd) to disambiguate. + + * "git blame" (and "git diff") learned the "--no-follow" option. + + * "git branch" now rejects some nonsense combinations of command line + arguments (e.g. giving more than one branch name to rename) with + more case-specific error messages. + + * "git check-ignore" command to help debugging .gitignore files has + been added. + + * "git cherry-pick" can be used to replay a root commit to an unborn + branch. + + * "git commit" can be told to use --cleanup=whitespace by setting the + configuration variable commit.cleanup to 'whitespace'. + + * "git diff" and other Porcelain commands can be told to use a + non-standard algorithm by setting diff.algorithm configuration + variable. + + * "git fetch --mirror" and fetch that uses other forms of refspec + with wildcard used to attempt to update a symbolic ref that match + the wildcard on the receiving end, which made little sense (the + real ref that is pointed at by the symbolic ref would be updated + anyway). Symbolic refs no longer are affected by such a fetch. + + * "git format-patch" now detects more cases in which a whole branch + is being exported, and uses the description for the branch, when + asked to write a cover letter for the series. + + * "git format-patch" learned "-v $count" option, and prepends a + string "v$count-" to the names of its output files, and also + automatically sets the subject prefix to "PATCH v$count". This + allows patches from rerolled series to be stored under different + names and makes it easier to reuse cover letter messages. + + * "git log" and friends can be told with --use-mailmap option to + rewrite the names and email addresses of people using the mailmap + mechanism. + + * "git log --cc --graph" now shows the combined diff output with the + ancestry graph. + + * "git log --grep=<pattern>" honors i18n.logoutputencoding to look + for the pattern after fixing the log message to the specified + encoding. + + * "git mergetool" and "git difftool" learned to list the available + tool backends in a more consistent manner. + + * "git mergetool" is aware of TortoiseGitMerge now and uses it over + TortoiseMerge when available. + + * "git push" now requires "-f" to update a tag, even if it is a + fast-forward, as tags are meant to be fixed points. + + * Error messages from "git push" when it stops to prevent remote refs + from getting overwritten by mistake have been improved to explain + various situations separately. + + * "git push" will stop without doing anything if the new "pre-push" + hook exists and exits with a failure. + + * When "git rebase" fails to generate patches to be applied (e.g. due + to oom), it failed to detect the failure and instead behaved as if + there were nothing to do. A workaround to use a temporary file has + been applied, but we probably would want to revisit this later, as + it hurts the common case of not failing at all. + + * Input and preconditions to "git reset" has been loosened where + appropriate. "git reset $fromtree Makefile" requires $fromtree to + be any tree (it used to require it to be a commit), for example. + "git reset" (without options or parameters) used to error out when + you do not have any commits in your history, but it now gives you + an empty index (to match non-existent commit you are not even on). + + * "git status" says what branch is being bisected or rebased when + able, not just "bisecting" or "rebasing". + + * "git submodule" started learning a new mode to integrate with the + tip of the remote branch (as opposed to integrating with the commit + recorded in the superproject's gitlink). + + * "git upload-pack" which implements the service "ls-remote" and + "fetch" talk to can be told to hide ref hierarchies the server + side internally uses (and that clients have no business learning + about) with transfer.hiderefs configuration. + + +Foreign Interface + + * "git fast-export" has been updated for its use in the context of + the remote helper interface. + + * A new remote helper to interact with bzr has been added to contrib/. + + * "git p4" got various bugfixes around its branch handling. It is + also made usable with Python 2.4/2.5. In addition, its various + portability issues for Cygwin have been addressed. + + * The remote helper to interact with Hg in contrib/ has seen a few + fixes. + + +Performance, Internal Implementation, etc. + + * "git fsck" has been taught to be pickier about entries in tree + objects that should not be there, e.g. ".", ".git", and "..". + + * Matching paths with common forms of pathspecs that contain wildcard + characters has been optimized further. + + * We stopped paying attention to $GIT_CONFIG environment that points + at a single configuration file from any command other than "git config" + quite a while ago, but "git clone" internally set, exported, and + then unexported the variable during its operation unnecessarily. + + * "git reset" internals has been reworked and should be faster in + general. We tried to be careful not to break any behaviour but + there could be corner cases, especially when running the command + from a conflicted state, that we may have missed. + + * The implementation of "imap-send" has been updated to reuse xml + quoting code from http-push codepath, and lost a lot of unused + code. + + * There is a simple-minded checker for the test scripts in t/ + directory to catch most common mistakes (it is not enabled by + default). + + * You can build with USE_WILDMATCH=YesPlease to use a replacement + implementation of pattern matching logic used for pathname-like + things, e.g. refnames and paths in the repository. This new + implementation is not expected change the existing behaviour of Git + in this release, except for "git for-each-ref" where you can now + say "refs/**/master" and match with both refs/heads/master and + refs/remotes/origin/master. We plan to use this new implementation + in wider places (e.g. "git ls-files '**/Makefile' may find Makefile + at the top-level, and "git log '**/t*.sh'" may find commits that + touch a shell script whose name begins with "t" at any level) in + future versions of Git, but we are not there yet. By building with + USE_WILDMATCH, using the resulting Git daily and reporting when you + find breakages, you can help us get closer to that goal. + + * Some reimplementations of Git do not write all the stat info back + to the index due to their implementation limitations (e.g. jgit). + A configuration option can tell Git to ignore changes to most of + the stat fields and only pay attention to mtime and size, which + these implementations can reliably update. This can be used to + avoid excessive revalidation of contents. + + * Some platforms ship with old version of expat where xmlparse.h + needs to be included instead of expat.h; the build procedure has + been taught about this. + + * "make clean" on platforms that cannot compute header dependencies + on the fly did not work with implementations of "rm" that do not + like an empty argument list. + +Also contains minor documentation updates and code clean-ups. + + +Fixes since v1.8.1 +------------------ + +Unless otherwise noted, all the fixes since v1.8.1 in the maintenance +track are contained in this release (see release notes to them for +details). + + * An element on GIT_CEILING_DIRECTORIES list that does not name the + real path to a directory (i.e. a symbolic link) could have caused + the GIT_DIR discovery logic to escape the ceiling. + + * When attempting to read the XDG-style $HOME/.config/git/config and + finding that $HOME/.config/git is a file, we gave a wrong error + message, instead of treating the case as "a custom config file does + not exist there" and moving on. + + * The behaviour visible to the end users was confusing, when they + attempt to kill a process spawned in the editor that was in turn + launched by Git with SIGINT (or SIGQUIT), as Git would catch that + signal and die. We ignore these signals now. + (merge 0398fc34 pf/editor-ignore-sigint later to maint). + + * A child process that was killed by a signal (e.g. SIGINT) was + reported in an inconsistent way depending on how the process was + spawned by us, with or without a shell in between. + + * After failing to create a temporary file using mkstemp(), failing + pathname was not reported correctly on some platforms. + + * We used to stuff "user@" and then append what we read from + /etc/mailname to come up with a default e-mail ident, but a bug + lost the "user@" part. + + * The attribute mechanism didn't allow limiting attributes to be + applied to only a single directory itself with "path/" like the + exclude mechanism does. The initial implementation of this that + was merged to 'maint' and 1.8.1.2 was with a severe performance + degradations and needs to merge a fix-up topic. + + * The smart HTTP clients forgot to verify the content-type that comes + back from the server side to make sure that the request is being + handled properly. + + * "git am" did not parse datestamp correctly from Hg generated patch, + when it is run in a locale outside C (or en). + + * "git apply" misbehaved when fixing whitespace breakages by removing + excess trailing blank lines. + + * "git apply --summary" has been taught to make sure the similarity + value shown in its output is sensible, even when the input had a + bogus value. + + * A tar archive created by "git archive" recorded a directory in a + way that made NetBSD's implementation of "tar" sometimes unhappy. + + * "git archive" did not record uncompressed size in the header when + streaming a zip archive, which confused some implementations of unzip. + + * "git archive" did not parse configuration values in tar.* namespace + correctly. + (merge b3873c3 jk/config-parsing-cleanup later to maint). + + * Attempt to "branch --edit-description" an existing branch, while + being on a detached HEAD, errored out. + + * "git clean" showed what it was going to do, but sometimes end up + finding that it was not allowed to do so, which resulted in a + confusing output (e.g. after saying that it will remove an + untracked directory, it found an embedded git repository there + which it is not allowed to remove). It now performs the actions + and then reports the outcome more faithfully. + + * When "git clone --separate-git-dir=$over_there" is interrupted, it + failed to remove the real location of the $GIT_DIR it created. + This was most visible when interrupting a submodule update. + + * "git cvsimport" mishandled timestamps at DST boundary. + + * We used to have an arbitrary 32 limit for combined diff input, + resulting in incorrect number of leading colons shown when showing + the "--raw --cc" output. + + * "git fetch --depth" was broken in at least three ways. The + resulting history was deeper than specified by one commit, it was + unclear how to wipe the shallowness of the repository with the + command, and documentation was misleading. + (merge cfb70e1 nd/fetch-depth-is-broken later to maint). + + * "git log --all -p" that walked refs/notes/textconv/ ref can later + try to use the textconv data incorrectly after it gets freed. + + * We forgot to close the file descriptor reading from "gpg" output, + killing "git log --show-signature" on a long history. + + * The way "git svn" asked for password using SSH_ASKPASS and + GIT_ASKPASS was not in line with the rest of the system. + + * The --graph code fell into infinite loop when asked to do what the + code did not expect. + + * http transport was wrong to ask for the username when the + authentication is done by certificate identity. + + * "git pack-refs" that ran in parallel to another process that + created new refs had a nasty race. + + * Rebasing the history of superproject with change in the submodule + has been broken since v1.7.12. + + * After "git add -N" and then writing a tree object out of the + index, the cache-tree data structure got corrupted. + + * "git clone" used to allow --bare and --separate-git-dir=$there + options at the same time, which was nonsensical. + + * "git rebase --preserve-merges" lost empty merges in recent versions + of Git. + + * "git merge --no-edit" computed who were involved in the work done + on the side branch, even though that information is to be discarded + without getting seen in the editor. + + * "git merge" started calling prepare-commit-msg hook like "git + commit" does some time ago, but forgot to pay attention to the exit + status of the hook. + + * A failure to push due to non-ff while on an unborn branch + dereferenced a NULL pointer when showing an error message. + + * When users spell "cc:" in lowercase in the fake "header" in the + trailer part, "git send-email" failed to pick up the addresses from + there. As e-mail headers field names are case insensitive, this + script should follow suit and treat "cc:" and "Cc:" the same way. + + * Output from "git status --ignored" showed an unexpected interaction + with "--untracked". + + * "gitweb", when sorting by age to show repositories with new + activities first, used to sort repositories with absolutely + nothing in it early, which was not very useful. + + * "gitweb"'s code to sanitize control characters before passing it to + "highlight" filter lost known-to-be-safe control characters by + mistake. + + * "gitweb" pages served over HTTPS, when configured to show picon or + gravatar, referred to these external resources to be fetched via + HTTP, resulting in mixed contents warning in browsers. + + * When a line to be wrapped has a solid run of non space characters + whose length exactly is the wrap width, "git shortlog -w" failed + to add a newline after such a line. + + * Command line completion leaked an unnecessary error message while + looking for possible matches with paths in <tree-ish>. + + * Command line completion for "tcsh" emitted an unwanted space + after completing a single directory name. + + * Command line completion code was inadvertently made incompatible with + older versions of bash by using a newer array notation. + + * "git push" was taught to refuse updating the branch that is + currently checked out long time ago, but the user manual was left + stale. + (merge 50995ed wk/man-deny-current-branch-is-default-these-days later to maint). + + * Some shells do not behave correctly when IFS is unset; work it + around by explicitly setting it to the default value. + + * Some scripted programs written in Python did not get updated when + PYTHON_PATH changed. + (cherry-pick 96a4647fca54031974cd6ad1 later to maint). + + * When autoconf is used, any build on a different commit always ran + "config.status --recheck" even when unnecessary. + + * A fix was added to the build procedure to work around buggy + versions of ccache broke the auto-generation of dependencies, which + unfortunately is still relevant because some people use ancient + distros. + + * The autoconf subsystem passed --mandir down to generated + config.mak.autogen but forgot to do the same for --htmldir. + (merge 55d9bf0 ct/autoconf-htmldir later to maint). + + * A change made on v1.8.1.x maintenance track had a nasty regression + to break the build when autoconf is used. + (merge 7f1b697 jn/less-reconfigure later to maint). + + * We have been carrying a translated and long-unmaintained copy of an + old version of the tutorial; removed. + + * t0050 had tests expecting failures from a bug that was fixed some + time ago. + + * t4014, t9502 and t0200 tests had various portability issues that + broke on OpenBSD. + + * t9020 and t3600 tests had various portability issues. + + * t9200 runs "cvs init" on a directory that already exists, but a + platform can configure this fail for the current user (e.g. you + need to be in the cvsadmin group on NetBSD 6.0). + + * t9020 and t9810 had a few non-portable shell script construct. + + * Scripts to test bash completion was inherently flaky as it was + affected by whatever random things the user may have on $PATH. + + * An element on GIT_CEILING_DIRECTORIES could be a "logical" pathname + that uses a symbolic link to point at somewhere else (e.g. /home/me + that points at /net/host/export/home/me, and the latter directory + is automounted). Earlier when Git saw such a pathname e.g. /home/me + on this environment variable, the "ceiling" mechanism did not take + effect. With this release (the fix has also been merged to the + v1.8.1.x maintenance series), elements on GIT_CEILING_DIRECTORIES + are by default checked for such aliasing coming from symbolic + links. As this needs to actually resolve symbolic links for each + element on the GIT_CEILING_DIRECTORIES, you can disable this + mechanism for some elements by listing them after an empty element + on the GIT_CEILING_DIRECTORIES. e.g. Setting /home/me::/home/him to + GIT_CEILING_DIRECTORIES makes Git resolve symbolic links in + /home/me when checking if the current directory is under /home/me, + but does not do so for /home/him. + (merge 7ec30aa mh/maint-ceil-absolute later to maint). diff --git a/Documentation/RelNotes/1.8.3.1.txt b/Documentation/RelNotes/1.8.3.1.txt new file mode 100644 index 0000000..986637b --- /dev/null +++ b/Documentation/RelNotes/1.8.3.1.txt @@ -0,0 +1,14 @@ +Git v1.8.3.1 Release Notes +========================== + +Fixes since v1.8.3 +------------------ + + * When $HOME is misconfigured to point at an unreadable directory, we + used to complain and die. The check has been loosened. + + * Handling of negative exclude pattern for directories "!dir" was + broken in the update to v1.8.3. + +Also contains a handful of trivial code clean-ups, documentation +updates, updates to the test suite, etc. diff --git a/Documentation/RelNotes/1.8.3.2.txt b/Documentation/RelNotes/1.8.3.2.txt new file mode 100644 index 0000000..26ae142 --- /dev/null +++ b/Documentation/RelNotes/1.8.3.2.txt @@ -0,0 +1,59 @@ +Git v1.8.3.2 Release Notes +========================== + +Fixes since v1.8.3.1 +-------------------- + + * Cloning with "git clone --depth N" while fetch.fsckobjects (or + transfer.fsckobjects) is set to true did not tell the cut-off + points of the shallow history to the process that validates the + objects and the history received, causing the validation to fail. + + * "git checkout foo" DWIMs the intended "upstream" and turns it into + "git checkout -t -b foo remotes/origin/foo". This codepath has been + updated to correctly take existing remote definitions into account. + + * "git fetch" into a shallow repository from a repository that does + not know about the shallow boundary commits (e.g. a different fork + from the repository the current shallow repository was cloned from) + did not work correctly. + + * "git subtree" (in contrib/) had one codepath with loose error + checks to lose data at the remote side. + + * "git log --ancestry-path A...B" did not work as expected, as it did + not pay attention to the fact that the merge base between A and B + was the bottom of the range being specified. + + * "git diff -c -p" was not showing a deleted line from a hunk when + another hunk immediately begins where the earlier one ends. + + * "git merge @{-1}~22" was rewritten to "git merge frotz@{1}~22" + incorrectly when your previous branch was "frotz" (it should be + rewritten to "git merge frotz~22" instead). + + * "git commit --allow-empty-message -m ''" should not start an + editor. + + * "git push --[no-]verify" was not documented. + + * An entry for "file://" scheme in the enumeration of URL types Git + can take in the HTML documentation was made into a clickable link + by mistake. + + * zsh prompt script that borrowed from bash prompt script did not + work due to slight differences in array variable notation between + these two shells. + + * The bash prompt code (in contrib/) displayed the name of the branch + being rebased when "rebase -i/-m/-p" modes are in use, but not the + plain vanilla "rebase". + + * "git push $there HEAD:branch" did not resolve HEAD early enough, so + it was easy to flip it around while push is still going on and push + out a branch that the user did not originally intended when the + command was started. + + * "difftool --dir-diff" did not copy back changes made by the + end-user in the diff tool backend to the working tree in some + cases. diff --git a/Documentation/RelNotes/1.8.3.3.txt b/Documentation/RelNotes/1.8.3.3.txt new file mode 100644 index 0000000..9ba4f4d --- /dev/null +++ b/Documentation/RelNotes/1.8.3.3.txt @@ -0,0 +1,47 @@ +Git v1.8.3.3 Release Notes +========================== + +Fixes since v1.8.3.2 +-------------------- + + * "git apply" parsed patches that add new files, generated by programs + other than Git, incorrectly. This is an old breakage in v1.7.11. + + * Older cURL wanted piece of memory we call it with to be stable, but + we updated the auth material after handing it to a call. + + * "git pull" into nothing trashed "local changes" that were in the + index. + + * Many "git submodule" operations did not work on a submodule at a + path whose name is not in ASCII. + + * "cherry-pick" had a small leak in its error codepath. + + * Logic used by git-send-email to suppress cc mishandled names like + "A U. Thor" <author@example.xz>, where the human readable part + needs to be quoted (the user input may not have the double quotes + around the name, and comparison was done between quoted and + unquoted strings). It also mishandled names that need RFC2047 + quoting. + + * "gitweb" forgot to clear a global variable $search_regexp upon each + request, mistakenly carrying over the previous search to a new one + when used as a persistent CGI. + + * The wildmatch engine did not honor WM_CASEFOLD option correctly. + + * "git log -c --follow $path" segfaulted upon hitting the commit that + renamed the $path being followed. + + * When a reflog notation is used for implicit "current branch", + e.g. "git log @{u}", we did not say which branch and worse said + "branch ''" in the error messages. + + * Mac OS X does not like to write(2) more than INT_MAX number of + bytes; work it around by chopping write(2) into smaller pieces. + + * Newer MacOS X encourages the programs to compile and link with + their CommonCrypto, not with OpenSSL. + +Also contains various minor documentation updates. diff --git a/Documentation/RelNotes/1.8.3.4.txt b/Documentation/RelNotes/1.8.3.4.txt new file mode 100644 index 0000000..56f106e --- /dev/null +++ b/Documentation/RelNotes/1.8.3.4.txt @@ -0,0 +1,20 @@ +Git v1.8.3.4 Release Notes +========================== + +This update is mostly to propagate documentation fixes and test +updates from the master front back to the maintenance track. + +Fixes since v1.8.3.3 +-------------------- + + * The bisect log listed incorrect commits when bisection ends with + only skipped ones. + + * The test coverage framework was left broken for some time. + + * The test suite for HTTP transport did not run with Apache 2.4. + + * "git diff" used to fail when core.safecrlf is set and the working + tree contents had mixed CRLF/LF line endings. Committing such a + content must be prohibited, but "git diff" should help the user to + locate and fix such problems without failing. diff --git a/Documentation/RelNotes/1.8.3.txt b/Documentation/RelNotes/1.8.3.txt new file mode 100644 index 0000000..ead568e --- /dev/null +++ b/Documentation/RelNotes/1.8.3.txt @@ -0,0 +1,436 @@ +Git v1.8.3 Release Notes +======================== + +Backward compatibility notes (for Git 2.0) +------------------------------------------ + +When "git push [$there]" does not say what to push, we have used the +traditional "matching" semantics so far (all your branches were sent +to the remote as long as there already are branches of the same name +over there). In Git 2.0, the default will change to the "simple" +semantics that pushes only the current branch to the branch with the same +name, and only when the current branch is set to integrate with that +remote branch. Use the user preference configuration variable +"push.default" to change this. If you are an old-timer who is used +to the "matching" semantics, you can set the variable to "matching" +to keep the traditional behaviour. If you want to live in the future +early, you can set it to "simple" today without waiting for Git 2.0. + +When "git add -u" (and "git add -A") is run inside a subdirectory and +does not specify which paths to add on the command line, it +will operate on the entire tree in Git 2.0 for consistency +with "git commit -a" and other commands. There will be no +mechanism to make plain "git add -u" behave like "git add -u .". +Current users of "git add -u" (without a pathspec) should start +training their fingers to explicitly say "git add -u ." +before Git 2.0 comes. A warning is issued when these commands are +run without a pathspec and when you have local changes outside the +current directory, because the behaviour in Git 2.0 will be different +from today's version in such a situation. + +In Git 2.0, "git add <path>" will behave as "git add -A <path>", so +that "git add dir/" will notice paths you removed from the directory +and record the removal. Versions before Git 2.0, including this +release, will keep ignoring removals, but the users who rely on this +behaviour are encouraged to start using "git add --ignore-removal <path>" +now before 2.0 is released. + + +Updates since v1.8.2 +-------------------- + +Foreign interface + + * remote-hg and remote-bzr helpers (in contrib/ since v1.8.2) have + been updated; especially, the latter has been done in an + accelerated schedule (read: we may not have merged to this release + if we were following the usual "cook sufficiently in next before + unleashing it to the world" workflow) in order to help Emacs folks, + whose primary SCM seems to be stagnating. + + +UI, Workflows & Features + + * A handful of updates applied to gitk, including an addition of + "revert" action, showing dates in tags in a nicer way, making + colors configurable, and support for -G'pickaxe' search. + + * The prompt string generator (in contrib/completion/) learned to + show how many changes there are in total and how many have been + replayed during a "git rebase" session. + + * "git branch --vv" learned to paint the name of the branch it + integrates with in a different color (color.branch.upstream, + which defaults to blue). + + * In a sparsely populated working tree, "git checkout <pathspec>" no + longer unmarks paths that match the given pathspec that were + originally ignored with "--sparse" (use --ignore-skip-worktree-bits + option to resurrect these paths out of the index if you really want + to). + + * "git log --format" specifier learned %C(auto) token that tells Git + to use color when interpolating %d (decoration), %h (short commit + object name), etc. for terminal output. + + * "git bisect" leaves the final outcome as a comment in its bisect + log file. + + * "git clone --reference" can now refer to a gitfile "textual symlink" + that points at the real location of the repository. + + * "git count-objects" learned "--human-readable" aka "-H" option to + show various large numbers in Ki/Mi/GiB scaled as necessary. + + * "git cherry-pick $blob" and "git cherry-pick $tree" are nonsense, + and a more readable error message e.g. "can't cherry-pick a tree" + is given (we used to say "expected exactly one commit"). + + * The "--annotate" option to "git send-email" can be turned on (or + off) by default with sendemail.annotate configuration variable (you + can use --no-annotate from the command line to override it). + + * The "--cover-letter" option to "git format-patch" can be turned on + (or off) by default with format.coverLetter configuration + variable. By setting it to 'auto', you can turn it on only for a + series with two or more patches. + + * The bash completion support (in contrib/) learned that cherry-pick + takes a few more options than it already knew about. + + * "git help" learned "-g" option to show the list of guides just like + list of commands are given with "-a". + + * A triangular "pull from one place, push to another place" workflow + is supported better by new remote.pushdefault (overrides the + "origin" thing) and branch.*.pushremote (overrides the + branch.*.remote) configuration variables. + + * "git status" learned to report that you are in the middle of a + revert session, just like it does for a cherry-pick and a bisect + session. + + * The handling by "git branch --set-upstream-to" against various forms + of erroneous inputs was suboptimal and has been improved. + + * When the interactive access to git-shell is not enabled, it issues + a message meant to help the system administrator to enable it. An + explicit way has been added to issue custom messages to refuse an + access over the network to help the end users who connect to the + service expecting an interactive shell. + + * In addition to the case where the user edits the log message with + the "e)dit" option of "am -i", replace the "Applying: this patch" + message with the final log message contents after applymsg hook + munges it. + + * "git status" suggests users to look into using --untracked=no option + when it takes too long. + + * "git status" shows a bit more information during a rebase/bisect + session. + + * "git fetch" learned to fetch a commit at the tip of an unadvertised + ref by specifying a raw object name from the command line when the + server side supports this feature. + + * Output from "git log --graph" works better with submodule log + output now. + + * "git count-objects -v" learned to report leftover temporary + packfiles and other garbage in the object store. + + * A new read-only credential helper (in contrib/) to interact with + the .netrc/.authinfo files has been added. + + * "git send-email" can be used with the credential helper system. + + * There was no Porcelain way to say "I no longer am interested in + this submodule", once you express your interest in a submodule with + "submodule init". "submodule deinit" is the way to do so. + + * "git pull --rebase" learned to pass "-v/-q" options to underlying + "git rebase". + + * The new "--follow-tags" option tells "git push" to push relevant + annotated tags when pushing branches out. + + * "git merge" and "git pull" can optionally be told to inspect and + reject when merging a commit that does not carry a trusted GPG + signature. + + * "git mergetool" now feeds files to the "p4merge" backend in the + order that matches the p4 convention, where "theirs" is usually + shown on the left side, which is the opposite from what other backends + expect. + + * "show/log" now honors gpg.program configuration just like other + parts of the code that use GnuPG. + + * "git log" that shows the difference between the parent and the + child has been optimized somewhat. + + * "git difftool" allows the user to write into the temporary files + being shown; if the user makes changes to the working tree at the + same time, it now refrains from overwriting the copy in the working + tree and leaves the temporary file so that changes can be merged + manually. + + * There was no good way to ask "I have a random string that came from + outside world. I want to turn it into a 40-hex object name while + making sure such an object exists". A new peeling suffix ^{object} + can be used for that purpose, together with "rev-parse --verify". + + +Performance, Internal Implementation, etc. + + * Updates for building under msvc. + + * A handful of issues in the code that traverses the working tree to find + untracked and/or ignored files have been fixed, and the general + codepath involved in "status -u" and "clean" have been cleaned up + and optimized. + + * The stack footprint of some codepaths that access an object from a + pack has been shrunk. + + * The logic to coalesce the same lines removed from the parents in + the output from "diff -c/--cc" has been updated, but with O(n^2) + complexity, so this might turn out to be undesirable. + + * The code to enforce permission bits on files in $GIT_DIR/ for + shared repositories has been simplified. + + * A few codepaths know how much data they need to put in the + hashtables they use when they start, but still began with small tables + and repeatedly grew and rehashed them. + + * The API to walk reflog entries from the latest to older, which was + necessary for operations such as "git checkout -", was cumbersome + to use correctly and also inefficient. + + * Codepaths that inspect log-message-to-be and decide when to add a + new Signed-off-by line in various commands have been consolidated. + + * The pkt-line API, implementation and its callers have been cleaned + up to make them more robust. + + * The Cygwin port has a faster-but-lying lstat(2) emulation whose + incorrectness does not matter in practice except for a few + codepaths, and setting permission bits on directories is a codepath + that needs to use a more correct one. + + * "git checkout" had repeated pathspec matches on the same paths, + which have been consolidated. Also a bug in "git checkout dir/" + that is started from an unmerged index has been fixed. + + * A few bugfixes to "git rerere" working on corner case merge + conflicts have been applied. + + +Also contains various documentation updates and code clean-ups. + + +Fixes since v1.8.2 +------------------ + +Unless otherwise noted, all the fixes since v1.8.2 in the maintenance +track are contained in this release (see release notes to them for +details). + + * Recent versions of File::Temp (used by "git svn") started blowing + up when its tempfile sub is called as a class method; updated the + callsite to call it as a plain vanilla function to fix it. + (merge eafc2dd hb/git-pm-tempfile later to maint). + + * Various subcommands of "git remote" simply ignored extraneous + command line arguments instead of diagnosing them as errors. + + * When receive-pack detects an error in the pack header it received in + order to decide which of unpack-objects or index-pack to run, it + returned without closing the error stream, which led to a hung + sideband thread. + + * Zsh completion forgot that the '%' character used to signal untracked + files needs to be escaped with another '%'. + + * A commit object whose author or committer ident are malformed + crashed some code that trusted that a name, an email and a + timestamp can always be found in it. + + * When "upload-pack" fails while generating a pack in response to + "git fetch" (or "git clone"), the receiving side had + a programming error that triggered the die handler + recursively. + + * "rev-list --stdin" and friends kept bogus pointers into the input + buffer around as human readable object names. This was not a huge + problem but was exposed by a new change that uses these names in + error output. + + * Smart-capable HTTP servers were not restricted via the + GIT_NAMESPACE mechanism when talking with commit-walking clients, + like they are when talking with smart HTTP clients. + (merge 6130f86 jk/http-dumb-namespaces later to maint). + + * "git merge-tree" did not omit a merge result that is identical to + the "our" side in certain cases. + (merge aacecc3 jk/merge-tree-added-identically later to maint). + + * Perl scripts like "git-svn" closed (instead of redirecting to /dev/null) + the standard error stream, which is not a very smart thing to do. + A later open may return file descriptor #2 for an unrelated purpose, and + error reporting code may write into it. + + * "git show-branch" was not prepared to show a very long run of + ancestor operators e.g. foobar^2~2^2^2^2...^2~4 correctly. + + * "git diff --diff-algorithm algo" is also understood as "git diff + --diff-algorithm=algo". + + * The new core.commentchar configuration was not applied in a few + places. + + * "git bundle" erroneously bailed out when parsing a valid bundle + containing a prerequisite commit without a commit message. + + * "git log -S/-G" started paying attention to textconv filter, but + there was no way to disable this. Make it honor the --no-textconv + option. + + * When used with the "-d temporary-directory" option, "git filter-branch" + failed to come back to the original working tree to perform the + final clean-up procedure. + + * "git merge $(git rev-parse v1.8.2)" behaved quite differently from + "git merge v1.8.2", as if v1.8.2 were written as v1.8.2^0 and did + not pay much attention to the annotated tag payload. Make the code + notice the type of the tag object, in addition to the dwim_ref() + based classification the current code uses (i.e. the name appears + in refs/tags/) to decide when to special-case tag merging. + + * Fix a 1.8.1.x regression that stopped matching "dir" (without a + trailing slash) to a directory "dir". + + * "git apply --whitespace=fix" was not prepared to see a line getting + longer after fixing whitespaces (e.g. tab-in-indent aka Python). + + * The prompt string generator (in contrib/completion/) did not notice + when we are in a middle of a "git revert" session. + + * "submodule summary --summary-limit" option did not support the + "--option=value" form. + + * "index-pack --fix-thin" used an uninitialized value to compute + the delta depths of objects it appends to the resulting pack. + + * "index-pack --verify-stat" used a few counters outside the protection + of a mutex, possibly showing incorrect numbers. + + * The code to keep track of what directory names are known to Git on + platforms with case insensitive filesystems could get confused upon a + hash collision between these pathnames and would loop forever. + + * Annotated tags outside the refs/tags/ hierarchy were not advertised + correctly to ls-remote and fetch with recent versions of Git. + + * Recent optimizations broke shallow clones. + + * "git cmd -- ':(top'" was not diagnosed as an invalid syntax, and + instead the parser kept reading beyond the end of the string. + + * "git tag -f <tag>" always said "Updated tag '<tag>'" even when + creating a new tag (i.e. neither overwriting nor updating). + + * "git p4" did not behave well when the path to the root of the P4 + client was not its real path. + (merge bbd8486 pw/p4-symlinked-root later to maint). + + * "git archive" reported a failure when asked to create an archive out + of an empty tree. It is more intuitive to give an empty + archive back in such a case. + + * When "format-patch" quoted a non-ascii string in header files, + it incorrectly applied rfc2047 and chopped a single character in + the middle of the string. + + * An aliased command spawned from a bare repository that does not say + it is bare with "core.bare = yes" was treated as non-bare by mistake. + + * In "git reflog expire", the REACHABLE bit was not cleared from the + correct objects. + + * The logic used by "git diff -M --stat" to shorten the names of + files before and after a rename did not work correctly when the + common prefix and suffix between the two filenames overlapped. + + * The "--match=<pattern>" option of "git describe", when used with + "--all" to allow refs that are not annotated tags to be a + base of description, did not restrict the output from the command + to those refs that match the given pattern. + + * Clarify in the documentation "what" gets pushed to "where" when the + command line to "git push" does not say these explicitly. + + * The "--color=<when>" argument to the commands in the diff family + was described poorly. + + * The arguments given to the pre-rebase hook were not documented. + + * The v4 index format was not documented. + + * The "--match=<pattern>" argument "git describe" takes uses glob + pattern but it wasn't obvious from the documentation. + + * Some sources failed to compile on systems that lack NI_MAXHOST in + their system header (e.g. z/OS). + + * Add an example use of "--env-filter" in "filter-branch" + documentation. + + * "git bundle verify" did not say "records a complete history" for a + bundle that does not have any prerequisites. + + * In the v1.8.0 era, we changed symbols that do not have to be global + to file scope static, but a few functions in graph.c were used by + CGit sideways, bypassing the entry points of the API the + in-tree users use. + + * "git update-index -h" did not do the usual "-h(elp)" thing. + + * "git index-pack" had a buffer-overflow while preparing an + informational message when the translated version of it was too + long. + + * 'git commit -m "$msg"' used to add an extra newline even when + $msg already ended with one. + + * The SSL peer verification done by "git imap-send" did not ask for + Server Name Indication (RFC 4366), failing to connect to SSL/TLS + sites that serve multiple hostnames on a single IP. + + * perl/Git.pm::cat_blob slurped everything in core only to write it + out to a file descriptor, which was not a very smart thing to do. + + * "git branch" did not bother to check nonsense command line + parameters. It now issues errors in many cases. + + * Verification of signed tags was not done correctly when not in C + or en/US locale. + + * Some platforms and users spell UTF-8 differently; retry with the + most official "UTF-8" when the system does not understand the + user-supplied encoding name that is a common alternative + spelling of UTF-8. + + * When export-subst is used, "zip" output recorded an incorrect + size of the file. + + * "git am $maildir/" applied messages in an unexpected order; sort + filenames read from the maildir/ in a way that is more likely to + sort the messages in the order the writing MUA meant to, by sorting + numeric segments in numeric order and non-numeric segments in + alphabetical order. + + * "git submodule update", when recursed into sub-submodules, did not + accumulate the prefix paths. diff --git a/Documentation/RelNotes/1.8.4.1.txt b/Documentation/RelNotes/1.8.4.1.txt new file mode 100644 index 0000000..96090ef --- /dev/null +++ b/Documentation/RelNotes/1.8.4.1.txt @@ -0,0 +1,71 @@ +Git v1.8.4.1 Release Notes +========================== + +Fixes since v1.8.4 +------------------ + + * Some old versions of bash do not grok some constructs like + 'printf -v varname' which the prompt and completion code started + to use recently. The completion and prompt scripts have been + adjusted to work better with these old versions of bash. + + * In FreeBSD's and NetBSD's "sh", a return in a dot script in a + function returns from the function, not only in the dot script, + breaking "git rebase" on these platforms (regression introduced + in 1.8.4-rc1). + + * "git rebase -i" and other scripted commands were feeding a + random, data dependant error message to 'echo' and expecting it + to come out literally. + + * Setting the "submodule.<name>.path" variable to the empty + "true" caused the configuration parser to segfault. + + * Output from "git log --full-diff -- <pathspec>" looked strange + because comparison was done with the previous ancestor that + touched the specified <pathspec>, causing the patches for paths + outside the pathspec to show more than the single commit has + changed. + + * The auto-tag-following code in "git fetch" tries to reuse the + same transport twice when the serving end does not cooperate and + does not give tags that point to commits that are asked for as + part of the primary transfer. Unfortunately, Git-aware transport + helper interface is not designed to be used more than once, hence + this did not work over smart-http transfer. Fixed. + + * Send a large request to read(2)/write(2) as a smaller but still + reasonably large chunks, which would improve the latency when the + operation needs to be killed and incidentally works around broken + 64-bit systems that cannot take a 2GB write or read in one go. + + * A ".mailmap" file that ends with an incomplete line, when read + from a blob, was not handled properly. + + * The recent "short-cut clone connectivity check" topic broke a + shallow repository when a fetch operation tries to auto-follow + tags. + + * When send-email comes up with an error message to die with upon + failure to start an SSL session, it tried to read the error + string from a wrong place. + + * A call to xread() was used without a loop to cope with short + read in the codepath to stream large blobs to a pack. + + * On platforms with fgetc() and friends defined as macros, the + configuration parser did not compile. + + * New versions of MediaWiki introduced a new API for returning + more than 500 results in response to a query, which would cause + the MediaWiki remote helper to go into an infinite loop. + + * Subversion's serf access method (the only one available in + Subversion 1.8) for http and https URLs in skelta mode tells its + caller to open multiple files at a time, which made "git svn + fetch" complain that "Temp file with moniker 'svn_delta' already + in use" instead of fetching. + + +Also contains a handful of trivial code clean-ups, documentation +updates, updates to the test suite, etc. diff --git a/Documentation/RelNotes/1.8.4.2.txt b/Documentation/RelNotes/1.8.4.2.txt new file mode 100644 index 0000000..bf6fb1a --- /dev/null +++ b/Documentation/RelNotes/1.8.4.2.txt @@ -0,0 +1,77 @@ +Git v1.8.4.2 Release Notes +========================== + +Fixes since v1.8.4.1 +-------------------- + + * "git clone" gave some progress messages to the standard output, not + to the standard error, and did not allow suppressing them with the + "--no-progress" option. + + * "format-patch --from=<whom>" forgot to omit unnecessary in-body + from line, i.e. when <whom> is the same as the real author. + + * "git shortlog" used to choke and die when there is a malformed + commit (e.g. missing authors); it now simply ignore such a commit + and keeps going. + + * "git merge-recursive" did not parse its "--diff-algorithm=" command + line option correctly. + + * "git branch --track" had a minor regression in v1.8.3.2 and later + that made it impossible to base your local work on anything but a + local branch of the upstream repository you are tracking from. + + * "git ls-files -k" needs to crawl only the part of the working tree + that may overlap the paths in the index to find killed files, but + shared code with the logic to find all the untracked files, which + made it unnecessarily inefficient. + + * When there is no sufficient overlap between old and new history + during a "git fetch" into a shallow repository, objects that the + sending side knows the receiving end has were unnecessarily sent. + + * When running "fetch -q", a long silence while the sender side + computes the set of objects to send can be mistaken by proxies as + dropped connection. The server side has been taught to send a + small empty messages to keep the connection alive. + + * When the webserver responds with "405 Method Not Allowed", "git + http-backend" should tell the client what methods are allowed with + the "Allow" header. + + * "git cvsserver" computed the permission mode bits incorrectly for + executable files. + + * The implementation of "add -i" has a crippling code to work around + ActiveState Perl limitation but it by mistake also triggered on Git + for Windows where MSYS perl is used. + + * We made sure that we notice the user-supplied GIT_DIR is actually a + gitfile, but did not do the same when the default ".git" is a + gitfile. + + * When an object is not found after checking the packfiles and then + loose object directory, read_sha1_file() re-checks the packfiles to + prevent racing with a concurrent repacker; teach the same logic to + has_sha1_file(). + + * "git commit --author=$name", when $name is not in the canonical + "A. U. Thor <au.thor@example.xz>" format, looks for a matching name + from existing history, but did not consult mailmap to grab the + preferred author name. + + * The commit object names in the insn sheet that was prepared at the + beginning of "rebase -i" session can become ambiguous as the + rebasing progresses and the repository gains more commits. Make + sure the internal record is kept with full 40-hex object names. + + * "git rebase --preserve-merges" internally used the merge machinery + and as a side effect, left merge summary message in the log, but + when rebasing, there should not be a need for merge summary. + + * "git rebase -i" forgot that the comment character can be + configurable while reading its insn sheet. + +Also contains a handful of trivial code clean-ups, documentation +updates, updates to the test suite, etc. diff --git a/Documentation/RelNotes/1.8.4.3.txt b/Documentation/RelNotes/1.8.4.3.txt new file mode 100644 index 0000000..267a1b3 --- /dev/null +++ b/Documentation/RelNotes/1.8.4.3.txt @@ -0,0 +1,54 @@ +Git v1.8.4.3 Release Notes +========================== + +Fixes since v1.8.4.2 +-------------------- + + * The interaction between use of Perl in our test suite and NO_PERL + has been clarified a bit. + + * A fast-import stream expresses a pathname with funny characters by + quoting them in C style; remote-hg remote helper (in contrib/) + forgot to unquote such a path. + + * One long-standing flaw in the pack transfer protocol used by "git + clone" was that there was no way to tell the other end which branch + "HEAD" points at, and the receiving end needed to guess. A new + capability has been defined in the pack protocol to convey this + information so that cloning from a repository with more than one + branches pointing at the same commit where the HEAD is at now + reliably sets the initial branch in the resulting repository. + + * We did not handle cases where http transport gets redirected during + the authorization request (e.g. from http:// to https://). + + * "git rev-list --objects ^v1.0^ v1.0" gave v1.0 tag itself in the + output, but "git rev-list --objects v1.0^..v1.0" did not. + + * The fall-back parsing of commit objects with broken author or + committer lines were less robust than ideal in picking up the + timestamps. + + * Bash prompting code to deal with an SVN remote as an upstream + were coded in a way not supported by older Bash versions (3.x). + + * "git checkout topic", when there is not yet a local "topic" branch + but there is a unique remote-tracking branch for a remote "topic" + branch, pretended as if "git checkout -t -b topic remote/$r/topic" + (for that unique remote $r) was run. This hack however was not + implemented for "git checkout topic --". + + * Coloring around octopus merges in "log --graph" output was screwy. + + * We did not generate HTML version of documentation to "git subtree" + in contrib/. + + * The synopsis section of "git unpack-objects" documentation has been + clarified a bit. + + * An ancient How-To on serving Git repositories on an HTTP server + lacked a warning that it has been mostly superseded with more + modern way. + +Also contains a handful of trivial code clean-ups, documentation +updates, updates to the test suite, etc. diff --git a/Documentation/RelNotes/1.8.4.4.txt b/Documentation/RelNotes/1.8.4.4.txt new file mode 100644 index 0000000..a7c1ce1 --- /dev/null +++ b/Documentation/RelNotes/1.8.4.4.txt @@ -0,0 +1,10 @@ +Git v1.8.4.4 Release Notes +========================== + +Fixes since v1.8.4.3 +-------------------- + + * The fix in v1.8.4.3 to the pack transfer protocol to propagate + the target of symbolic refs broke "git clone/git fetch" from a + repository with too many symbolic refs. As a hotfix/workaround, + we transfer only the information on HEAD. diff --git a/Documentation/RelNotes/1.8.4.5.txt b/Documentation/RelNotes/1.8.4.5.txt new file mode 100644 index 0000000..215bd1a --- /dev/null +++ b/Documentation/RelNotes/1.8.4.5.txt @@ -0,0 +1,13 @@ +Git v1.8.4.5 Release Notes +========================== + +Fixes since v1.8.4.4 +-------------------- + + * Recent update to remote-hg that attempted to make it work better + with non ASCII pathnames fed Unicode strings to the underlying Hg + API, which was wrong. + + * "git submodule init" copied "submodule.$name.update" settings from + .gitmodules to .git/config without making sure if the suggested + value was sensible. diff --git a/Documentation/RelNotes/1.8.4.txt b/Documentation/RelNotes/1.8.4.txt new file mode 100644 index 0000000..02f681b --- /dev/null +++ b/Documentation/RelNotes/1.8.4.txt @@ -0,0 +1,486 @@ +Git v1.8.4 Release Notes +======================== + +Backward compatibility notes (for Git 2.0) +------------------------------------------ + +When "git push [$there]" does not say what to push, we have used the +traditional "matching" semantics so far (all your branches were sent +to the remote as long as there already are branches of the same name +over there). In Git 2.0, the default will change to the "simple" +semantics that pushes: + + - only the current branch to the branch with the same name, and only + when the current branch is set to integrate with that remote + branch, if you are pushing to the same remote as you fetch from; or + + - only the current branch to the branch with the same name, if you + are pushing to a remote that is not where you usually fetch from. + +Use the user preference configuration variable "push.default" to +change this. If you are an old-timer who is used to the "matching" +semantics, you can set the variable to "matching" to keep the +traditional behaviour. If you want to live in the future early, you +can set it to "simple" today without waiting for Git 2.0. + +When "git add -u" (and "git add -A") is run inside a subdirectory and +does not specify which paths to add on the command line, it +will operate on the entire tree in Git 2.0 for consistency +with "git commit -a" and other commands. There will be no +mechanism to make plain "git add -u" behave like "git add -u .". +Current users of "git add -u" (without a pathspec) should start +training their fingers to explicitly say "git add -u ." +before Git 2.0 comes. A warning is issued when these commands are +run without a pathspec and when you have local changes outside the +current directory, because the behaviour in Git 2.0 will be different +from today's version in such a situation. + +In Git 2.0, "git add <path>" will behave as "git add -A <path>", so +that "git add dir/" will notice paths you removed from the directory +and record the removal. Versions before Git 2.0, including this +release, will keep ignoring removals, but the users who rely on this +behaviour are encouraged to start using "git add --ignore-removal <path>" +now before 2.0 is released. + + +Updates since v1.8.3 +-------------------- + +Foreign interfaces, subsystems and ports. + + * Cygwin port has been updated for more recent Cygwin 1.7. + + * "git rebase -i" now honors --strategy and -X options. + + * Git-gui has been updated to its 0.18.0 version. + + * MediaWiki remote helper (in contrib/) has been updated to use the + credential helper interface from Git.pm. + + * Update build for Cygwin 1.[57]. Torsten Bögershausen reports that + this is fine with Cygwin 1.7 ($gmane/225824) so let's try moving it + ahead. + + * The credential helper to talk to keychain on OS X (in contrib/) has + been updated to kick in not just when talking http/https but also + imap(s) and smtp. + + * Remote transport helper has been updated to report errors and + maintain ref hierarchy used to keep track of its own state better. + + * With "export" remote-helper protocol, (1) a push that tries to + update a remote ref whose name is different from the pushing side + does not work yet, and (2) the helper may not know how to do + --dry-run; these problematic cases are disabled for now. + + * git-remote-hg/bzr (in contrib/) updates. + + * git-remote-mw (in contrib/) hints users to check the certificate, + when https:// connection failed. + + * git-remote-mw (in contrib/) adds a command to allow previewing the + contents locally before pushing it out, when working with a + MediaWiki remote. + + +UI, Workflows & Features + + * Sample "post-receive-email" hook script got an enhanced replacement + "multimail" (in contrib/). + + * Also in contrib/ is a new "contacts" script that runs "git blame" + to find out the people who may be interested in a set of changes. + + * "git clean" command learned an interactive mode. + + * The "--head" option to "git show-ref" was only to add "HEAD" to the + list of candidate refs to be filtered by the usual rules + (e.g. "--heads" that only show refs under refs/heads). The meaning + of the option has been changed to always show "HEAD" regardless of + what filtering will be applied to any other ref. + + This is a backward incompatible change and might cause breakages to + people's existing scripts. + + * "git show -s" was less discoverable than it should have been. It + now has a natural synonym "git show --no-patch". + + * "git check-mailmap" is a new command that lets you map usernames + and e-mail addresses through the mailmap mechanism, just like many + built-in commands do. + + * "git name-rev" learned to name an annotated tag object back to its + tagname; "git name-rev $(git rev-parse v1.0.0)" gives "tags/v1.0.0", + for example. + + * "git cat-file --batch-check=<format>" is added, primarily to allow + on-disk footprint of objects in packfiles (often they are a lot + smaller than their true size, when expressed as deltas) to be + reported. + + * "git rebase [-i]" used to leave just "rebase" as its reflog messages + for some operations. They have been reworded to be more informative. + + * In addition to the choice from "rebase, merge, or checkout-detach", + "submodule update" can allow a custom command to be used in to + update the working tree of submodules via the "submodule.*.update" + configuration variable. + + * "git submodule update" can optionally clone the submodule + repositories shallowly. + + * "git format-patch" learned "--from[=whom]" option, which sets the + "From: " header to the specified person (or the person who runs the + command, if "=whom" part is missing) and move the original author + information to an in-body From: header as necessary. + + * The configuration variable "merge.ff" was cleary a tri-state to + choose one from "favor fast-forward when possible", "always create + a merge even when the history could fast-forward" and "do not + create any merge, only update when the history fast-forwards", but + the command line parser did not implement the usual convention of + "last one wins, and command line overrides the configuration" + correctly. + + * "gitweb" learned to optionally place extra links that point at the + levels higher than the Gitweb pages themselves in the breadcrumbs, + so that it can be used as part of a larger installation. + + * "git log --format=" now honors i18n.logoutputencoding configuration + variable. + + * The "push.default=simple" mode of "git push" has been updated to + behave like "current" without requiring a remote tracking + information, when you push to a remote that is different from where + you fetch from (i.e. a triangular workflow). + + * Having multiple "fixup!" on a line in the rebase instruction sheet + did not work very well with "git rebase -i --autosquash". + + * "git log" learned the "--author-date-order" option, with which the + output is topologically sorted and commits in parallel histories + are shown intermixed together based on the author timestamp. + + * Various subcommands of "git submodule" refused to run from anywhere + other than the top of the working tree of the superproject, but + they have been taught to let you run from a subdirectory. + + * "git diff" learned a mode that ignores hunks whose change consists + only of additions and removals of blank lines, which is the same as + "diff -B" (ignore blank lines) of GNU diff. + + * "git rm" gives a single message followed by list of paths to report + multiple paths that cannot be removed. + + * "git rebase" can be told with ":/look for this string" syntax commits + to replay the changes onto and where the work to be replayed begins. + + * Many tutorials teach users to set "color.ui" to "auto" as the first + thing after you set "user.name/email" to introduce yourselves to + Git. Now the variable defaults to "auto". + + * On Cygwin, "cygstart" is now recognised as a possible way to start + a web browser (used in "help -w" and "instaweb" among others). + + * "git status" learned status.branch and status.short configuration + variables to use --branch and --short options by default (override + with --no-branch and --no-short options from the command line). + + * "git cmd <name>", when <name> happens to be a 40-hex string, + directly uses the 40-hex string as an object name, even if a ref + "refs/<some hierarchy>/<name>" exists. This disambiguation order + is unlikely to change, but we should warn about the ambiguity just + like we warn when more than one refs/ hierarchies share the same + name. + + * "git rebase" learned "--[no-]autostash" option to save local + changes instead of refusing to run (to which people's normal + response was to stash them and re-run). This introduced a corner + case breakage to "git am --abort" but it has been fixed. + + * "check-ignore" (new feature since 1.8.2) has been updated to work + more like "check-attr" over bidi-pipes. + + * "git describe" learned "--first-parent" option to limit its closest + tagged commit search to the first-parent chain. + + * "git merge foo" that might have meant "git merge origin/foo" is + diagnosed with a more informative error message. + + * "git log -L<line>,<range>:<filename>" has been added. This may + still have leaks and rough edges, though. + + * We used the approxidate() parser for "--expire=<timestamp>" options + of various commands, but it is better to treat --expire=all and + --expire=now a bit more specially than using the current timestamp. + "git gc" and "git reflog" have been updated with a new parsing + function for expiry dates. + + * Updates to completion (both bash and zsh) helpers. + + * The behaviour of the "--chain-reply-to" option of "git send-email" + have changed at 1.7.0, and we added a warning/advice message to + help users adjust to the new behaviour back then, but we kept it + around for too long. The message has finally been removed. + + * "git fetch origin master" unlike "git fetch origin" or "git fetch" + did not update "refs/remotes/origin/master"; this was an early + design decision to keep the update of remote tracking branches + predictable, but in practice it turns out that people find it more + convenient to opportunistically update them whenever we have a + chance, and we have been updating them when we run "git push" which + already breaks the original "predictability" anyway. + + * The configuration variable core.checkstat was advertised in the + documentation but the code expected core.statinfo instead. + For now, we accept both core.checkstat and core.statinfo, but the + latter will be removed in the longer term. + + +Performance, Internal Implementation, etc. + + * On Cygwin, we used to use our own lstat(2) emulation that is + allegedly faster than the platform one in codepaths where some of + the information it returns did not matter, but it started to bite + us in a few codepaths where the trick it uses to cheat does show + breakages. This emulation has been removed and we use the native + lstat(2) emulation supplied by Cygwin now. + + * The function attributes extensions are used to catch mistakes in + use of our own variadic functions that use NULL sentinel at the end + (i.e. like execl(3)) and format strings (i.e. like printf(3)). + + * The code to allow configuration data to be read from in-tree blob + objects is in. This may help working in a bare repository and + submodule updates. + + * Fetching between repositories with many refs employed O(n^2) + algorithm to match up the common objects, which has been corrected. + + * The original way to specify remote repository using .git/branches/ + used to have a nifty feature. The code to support the feature was + still in a function but the caller was changed not to call it 5 + years ago, breaking that feature and leaving the supporting code + unreachable. The dead code has been removed. + + * "git pack-refs" that races with new ref creation or deletion have + been susceptible to lossage of refs under right conditions, which + has been tightened up. + + * We read loose and packed references in two steps, but after + deciding to read a loose ref but before actually opening it to read + it, another process racing with us can unlink it, which would cause + us to barf. The codepath has been updated to retry when such a + race is detected, instead of outright failing. + + * Uses of the platform fnmatch(3) function (many places in the code, + matching pathspec, .gitignore and .gitattributes to name a few) + have been replaced with wildmatch, allowing "foo/**/bar" that would + match foo/bar, foo/a/bar, foo/a/b/bar, etc. + + * Memory ownership and lifetime rules for what for-each-ref feeds to + its callbacks have been clarified (in short, "you do not own it, so + make a copy if you want to keep it"). + + * The revision traversal logic to improve culling of irrelevant + parents while traversing a mergy history has been updated. + + * Some leaks in unpack-trees (used in merge, cherry-pick and other + codepaths) have been plugged. + + * The codepath to read from marks files in fast-import/export did not + have to accept anything but 40-hex representation of the object + name. Further, fast-export did not need full in-core object + representation to have parsed wen reading from them. These + codepaths have been optimized by taking advantage of these access + patterns. + + * Object lookup logic, when the object hashtable starts to become + crowded, has been optimized. + + * When TEST_OUTPUT_DIRECTORY setting is used, it was handled somewhat + inconsistently between the test framework and t/Makefile, and logic + to summarize the results looked at a wrong place. + + * "git clone" uses a lighter-weight implementation when making sure + that the history behind refs are complete. + + * Many warnings from sparse source checker in compat/ area has been + squelched. + + * The code to reading and updating packed-refs file has been updated, + correcting corner case bugs. + + +Also contains various documentation updates and code clean-ups. + + +Fixes since v1.8.3 +------------------ + +Unless otherwise noted, all the fixes since v1.8.3 in the maintenance +track are contained in this release (see release notes to them for +details). + + * Newer Net::SMTP::SSL module does not want the user programs to use + the default behaviour to let server certificate go without + verification, so by default enable the verification with a + mechanism to turn it off if needed. + (merge 35035bb rr/send-email-ssl-verify later to maint). + + * When "git" is spawned in such a way that any of the low 3 file + descriptors is closed, our first open() may yield file descriptor 2, + and writing error message to it would screw things up in a big way. + (merge a11c396 tr/protect-low-3-fds later to maint). + + * The mailmap mechanism unnecessarily downcased the e-mail addresses + in the output, and also ignored the human name when it is a single + character name. + (merge bd23794 jc/mailmap-case-insensitivity later to maint). + + * In two places we did not check return value (expected to be a file + descriptor) correctly. + (merge a77f106 tr/fd-gotcha-fixes later to maint). + + * Logic to auto-detect character encodings in the commit log message + did not reject overlong and invalid UTF-8 characters. + (merge 81050ac bc/commit-invalid-utf8 later to maint). + + * Pass port number as a separate argument when "send-email" initializes + Net::SMTP, instead of as a part of the hostname, i.e. host:port. + This allows GSSAPI codepath to match with the hostname given. + (merge 1a741bf bc/send-email-use-port-as-separate-param later to maint). + + * "git diff" refused to even show difference when core.safecrlf is + set to true (i.e. error out) and there are offending lines in the + working tree files. + (merge 5430bb2 jc/maint-diff-core-safecrlf later to maint). + + * A test that should have failed but didn't revealed a bug that needs + to be corrected. + (merge 94d75d1 jc/t1512-fix later to maint). + + * An overlong path to a .git directory may have overflown the + temporary path buffer used to create a name for lockfiles. + (merge 2fbd4f9 mh/maint-lockfile-overflow later to maint). + + * Invocations of "git checkout" used internally by "git rebase" were + counted as "checkout", and affected later "git checkout -" to the + the user to an unexpected place. + (merge 3bed291 rr/rebase-checkout-reflog later to maint). + + * The configuration variable column.ui was poorly documented. + (merge 5e62cc1 rr/column-doc later to maint). + + * "git name-rev --refs=tags/v*" were forbidden, which was a bit + inconvenient (you had to give a pattern to match refs fully, like + --refs=refs/tags/v*). + (merge 98c5c4a nk/name-rev-abbreviated-refs later to maint). + + * "git apply" parsed patches that add new files, generated by + programs other than Git, incorrectly. This is an old breakage in + v1.7.11 and will need to be merged down to the maintenance tracks. + + * Older cURL wanted piece of memory we call it with to be stable, but + we updated the auth material after handing it to a call. + + * "git pull" into nothing trashed "local changes" that were in the + index, and this avoids it. + + * Many "git submodule" operations do not work on a submodule at a + path whose name is not in ASCII. + + * "cherry-pick" had a small leak in an error codepath. + + * Logic used by git-send-email to suppress cc mishandled names like + "A U. Thor" <author@example.xz>, where the human readable part + needs to be quoted (the user input may not have the double quotes + around the name, and comparison was done between quoted and + unquoted strings). It also mishandled names that need RFC2047 + quoting. + + * Call to discard_cache/discard_index (used when we use different + contents of the index in-core, in many operations like commit, + apply, and merge) used to leak memory that held the array of index + entries, which has been plugged. + (merge a0fc4db rs/discard-index-discard-array later to maint). + + * "gitweb" forgot to clear a global variable $search_regexp upon each + request, mistakenly carrying over the previous search to a new one + when used as a persistent CGI. + + * The wildmatch engine did not honor WM_CASEFOLD option correctly. + + * "git log -c --follow $path" segfaulted upon hitting the commit that + renamed the $path being followed. + + * When a reflog notation is used for implicit "current branch", we + did not say which branch and worse said "branch ''". + + * "difftool --dir-diff" did not copy back changes made by the + end-user in the diff tool backend to the working tree in some + cases. + + * "git push $there HEAD:branch" did not resolve HEAD early enough, so + it was easy to flip it around while push is still going on and push + out a branch that the user did not originally intended when the + command was started. + + * The bash prompt code (in contrib/) displayed the name of the branch + being rebased when "rebase -i/-m/-p" modes are in use, but not the + plain vanilla "rebase". + + * Handling of negative exclude pattern for directories "!dir" was + broken in the update to v1.8.3. + + * zsh prompt script that borrowed from bash prompt script did not + work due to slight differences in array variable notation between + these two shells. + + * An entry for "file://" scheme in the enumeration of URL types Git + can take in the HTML documentation was made into a clickable link + by mistake. + + * "git push --[no-]verify" was not documented. + + * Stop installing the git-remote-testpy script that is only used for + testing. + + * "git commit --allow-empty-message -m ''" should not start an + editor. + + * "git merge @{-1}~22" was rewritten to "git merge frotz@{1}~22" + incorrectly when your previous branch was "frotz" (it should be + rewritten to "git merge frotz~22" instead). + + * "git diff -c -p" was not showing a deleted line from a hunk when + another hunk immediately begins where the earlier one ends. + + * "git log --ancestry-path A...B" did not work as expected, as it did + not pay attention to the fact that the merge base between A and B + was the bottom of the range being specified. + + * Mac OS X does not like to write(2) more than INT_MAX number of + bytes; work it around by chopping write(2) into smaller pieces. + + * Newer MacOS X encourages the programs to compile and link with + their CommonCrypto, not with OpenSSL. + + * "git clone foo/bar:baz" cannot be a request to clone from a remote + over git-over-ssh specified in the scp style. This case is now + detected and clones from a local repository at "foo/bar:baz". + + * When $HOME is misconfigured to point at an unreadable directory, we + used to complain and die. Loosen the check. + + * "git subtree" (in contrib/) had one codepath with loose error + checks to lose data at the remote side. + + * "git fetch" into a shallow repository from a repository that does + not know about the shallow boundary commits (e.g. a different fork + from the repository the current shallow repository was cloned from) + did not work correctly. + + * "git checkout foo" DWIMs the intended "upstream" and turns it into + "git checkout -t -b foo remotes/origin/foo". This codepath has been + updated to correctly take existing remote definitions into account. diff --git a/Documentation/RelNotes/1.8.5.1.txt b/Documentation/RelNotes/1.8.5.1.txt new file mode 100644 index 0000000..7236aaf --- /dev/null +++ b/Documentation/RelNotes/1.8.5.1.txt @@ -0,0 +1,9 @@ +Git v1.8.5.1 Release Notes +========================== + +Fixes since v1.8.5 +------------------ + + * "git submodule init" copied "submodule.$name.update" settings from + .gitmodules to .git/config without making sure if the suggested + value was sensible. diff --git a/Documentation/RelNotes/1.8.5.2.txt b/Documentation/RelNotes/1.8.5.2.txt new file mode 100644 index 0000000..3ac4984 --- /dev/null +++ b/Documentation/RelNotes/1.8.5.2.txt @@ -0,0 +1,20 @@ +Git v1.8.5.2 Release Notes +========================== + +Fixes since v1.8.5.1 +-------------------- + + * "git diff -- ':(icase)makefile'" was unnecessarily rejected at the + command line parser. + + * "git cat-file --batch-check=ok" did not check the existence of + the named object. + + * "git am --abort" sometimes complained about not being able to write + a tree with an 0{40} object in it. + + * Two processes creating loose objects at the same time could have + failed unnecessarily when the name of their new objects started + with the same byte value, due to a race condition. + +Also contains typofixes, documentation updates and trivial code clean-ups. diff --git a/Documentation/RelNotes/1.8.5.3.txt b/Documentation/RelNotes/1.8.5.3.txt new file mode 100644 index 0000000..3de2dd0 --- /dev/null +++ b/Documentation/RelNotes/1.8.5.3.txt @@ -0,0 +1,27 @@ +Git v1.8.5.3 Release Notes +========================== + +Fixes since v1.8.5.2 +-------------------- + + * The "--[no-]informative-errors" options to "git daemon" were parsed + a bit too loosely, allowing any other string after these option + names. + + * A "gc" process running as a different user should be able to stop a + new "gc" process from starting. + + * An earlier "clean-up" introduced an unnecessary memory leak to the + credential subsystem. + + * "git mv A B/", when B does not exist as a directory, should error + out, but it didn't. + + * "git rev-parse <revs> -- <paths>" did not implement the usual + disambiguation rules the commands in the "git log" family used in + the same way. + + * "git cat-file --batch=", an admittedly useless command, did not + behave very well. + +Also contains typofixes, documentation updates and trivial code clean-ups. diff --git a/Documentation/RelNotes/1.8.5.4.txt b/Documentation/RelNotes/1.8.5.4.txt new file mode 100644 index 0000000..d18c403 --- /dev/null +++ b/Documentation/RelNotes/1.8.5.4.txt @@ -0,0 +1,48 @@ +Git v1.8.5.4 Release Notes +========================== + +Fixes since v1.8.5.3 +-------------------- + + * "git fetch --depth=0" was a no-op, and was silently ignored. + Diagnose it as an error. + + * Remote repository URL expressed in scp-style host:path notation are + parsed more carefully (e.g. "foo/bar:baz" is local, "[::1]:/~user" asks + to connect to user's home directory on host at address ::1. + + * SSL-related options were not passed correctly to underlying socket + layer in "git send-email". + + * "git commit -v" appends the patch to the log message before + editing, and then removes the patch when the editor returned + control. However, the patch was not stripped correctly when the + first modified path was a submodule. + + * "git mv A B/", when B does not exist as a directory, should error + out, but it didn't. + + * When we figure out how many file descriptors to allocate for + keeping packfiles open, a system with non-working getrlimit() could + cause us to die(), but because we make this call only to get a + rough estimate of how many is available and we do not even attempt + to use up all file descriptors available ourselves, it is nicer to + fall back to a reasonable low value rather than dying. + + * "git log --decorate" did not handle a tag pointed by another tag + nicely. + + * "git add -A" (no other arguments) in a totally empty working tree + used to emit an error. + + * There is no reason to have a hardcoded upper limit of the number of + parents for an octopus merge, created via the graft mechanism, but + there was. + + * The implementation of 'git stash $cmd "stash@{...}"' did not quote + the stash argument properly and left it split at IFS whitespace. + + * The documentation to "git pull" hinted there is an "-m" option + because it incorrectly shared the documentation with "git merge". + +Also contains typofixes, documentation updates and trivial code clean-ups. diff --git a/Documentation/RelNotes/1.8.5.5.txt b/Documentation/RelNotes/1.8.5.5.txt new file mode 100644 index 0000000..9191ce9 --- /dev/null +++ b/Documentation/RelNotes/1.8.5.5.txt @@ -0,0 +1,37 @@ +Git v1.8.5.5 Release Notes +========================== + +Fixes since v1.8.5.4 +-------------------- + + * The pathspec matching code, while comparing two trees (e.g. "git + diff A B -- path1 path2") was too aggressive and failed to match + some paths when multiple pathspecs were involved. + + * "git repack --max-pack-size=8g" stopped being parsed correctly when + the command was reimplemented in C. + + * A recent update to "git send-email" broke platforms where + /etc/ssl/certs/ directory exists but cannot be used as SSL_ca_path + (e.g. Fedora rawhide). + + * A handful of bugs around interpreting $branch@{upstream} notation + and its lookalike, when $branch part has interesting characters, + e.g. "@", and ":", have been fixed. + + * "git clone" would fail to clone from a repository that has a ref + directly under "refs/", e.g. "refs/stash", because different + validation paths do different things on such a refname. Loosen the + client side's validation to allow such a ref. + + * "git log --left-right A...B" lost the "leftness" of commits + reachable from A when A is a tag as a side effect of a recent + bugfix. This is a regression in 1.8.4.x series. + + * "git merge-base --octopus" used to leave cleaning up suboptimal + result to the caller, but now it does the clean-up itself. + + * "git mv A B/", when B does not exist as a directory, should error + out, but it didn't. + +Also contains typofixes, documentation updates and trivial code clean-ups. diff --git a/Documentation/RelNotes/1.8.5.6.txt b/Documentation/RelNotes/1.8.5.6.txt new file mode 100644 index 0000000..92ff92b --- /dev/null +++ b/Documentation/RelNotes/1.8.5.6.txt @@ -0,0 +1,34 @@ +Git v1.8.5.6 Release Notes +========================== + +Fixes since v1.8.5.5 +-------------------- + + * We used to allow committing a path ".Git/config" with Git that is + running on a case sensitive filesystem, but an attempt to check out + such a path with Git that runs on a case insensitive filesystem + would have clobbered ".git/config", which is definitely not what + the user would have expected. Git now prevents you from tracking + a path with ".Git" (in any case combination) as a path component. + + * On Windows, certain path components that are different from ".git" + are mapped to ".git", e.g. "git~1/config" is treated as if it were + ".git/config". HFS+ has a similar issue, where certain unicode + codepoints are ignored, e.g. ".g\u200cit/config" is treated as if + it were ".git/config". Pathnames with these potential issues are + rejected on the affected systems. Git on systems that are not + affected by this issue (e.g. Linux) can also be configured to + reject them to ensure cross platform interoperability of the hosted + projects. + + * "git fsck" notices a tree object that records such a path that can + be confused with ".git", and with receive.fsckObjects configuration + set to true, an attempt to "git push" such a tree object will be + rejected. Such a path may not be a problem on a well behaving + filesystem but in order to protect those on HFS+ and on case + insensitive filesystems, this check is enabled on all platforms. + +A big "thanks!" for bringing this issue to us goes to our friends in +the Mercurial land, namely, Matt Mackall and Augie Fackler. + +Also contains typofixes, documentation updates and trivial code clean-ups. diff --git a/Documentation/RelNotes/1.8.5.txt b/Documentation/RelNotes/1.8.5.txt new file mode 100644 index 0000000..602df0c --- /dev/null +++ b/Documentation/RelNotes/1.8.5.txt @@ -0,0 +1,456 @@ +Git v1.8.5 Release Notes +======================== + +Backward compatibility notes (for Git 2.0) +------------------------------------------ + +When "git push [$there]" does not say what to push, we have used the +traditional "matching" semantics so far (all your branches were sent +to the remote as long as there already are branches of the same name +over there). In Git 2.0, the default will change to the "simple" +semantics, which pushes: + + - only the current branch to the branch with the same name, and only + when the current branch is set to integrate with that remote + branch, if you are pushing to the same remote as you fetch from; or + + - only the current branch to the branch with the same name, if you + are pushing to a remote that is not where you usually fetch from. + +Use the user preference configuration variable "push.default" to +change this. If you are an old-timer who is used to the "matching" +semantics, you can set the variable to "matching" to keep the +traditional behaviour. If you want to live in the future early, you +can set it to "simple" today without waiting for Git 2.0. + +When "git add -u" (and "git add -A") is run inside a subdirectory and +does not specify which paths to add on the command line, it +will operate on the entire tree in Git 2.0 for consistency +with "git commit -a" and other commands. There will be no +mechanism to make plain "git add -u" behave like "git add -u .". +Current users of "git add -u" (without a pathspec) should start +training their fingers to explicitly say "git add -u ." +before Git 2.0 comes. A warning is issued when these commands are +run without a pathspec and when you have local changes outside the +current directory, because the behaviour in Git 2.0 will be different +from today's version in such a situation. + +In Git 2.0, "git add <path>" will behave as "git add -A <path>", so +that "git add dir/" will notice paths you removed from the directory +and record the removal. Versions before Git 2.0, including this +release, will keep ignoring removals, but the users who rely on this +behaviour are encouraged to start using "git add --ignore-removal <path>" +now before 2.0 is released. + +The default prefix for "git svn" will change in Git 2.0. For a long +time, "git svn" created its remote-tracking branches directly under +refs/remotes, but it will place them under refs/remotes/origin/ unless +it is told otherwise with its --prefix option. + + +Updates since v1.8.4 +-------------------- + +Foreign interfaces, subsystems and ports. + + * "git-svn" has been taught to use the serf library, which is the + only option SVN 1.8.0 offers us when talking the HTTP protocol. + + * "git-svn" talking over an https:// connection using the serf library + dumped core due to a bug in the serf library that SVN uses. Work + around it on our side, even though the SVN side is being fixed. + + * On MacOS X, we detected if the filesystem needs the "pre-composed + unicode strings" workaround, but did not automatically enable it. + Now we do. + + * remote-hg remote helper misbehaved when interacting with a local Hg + repository relative to the home directory, e.g. "clone hg::~/there". + + * imap-send ported to OS X uses Apple's security framework instead of + OpenSSL's. + + * "git fast-import" treats an empty path given to "ls" as the root of + the tree. + + +UI, Workflows & Features + + * xdg-open can be used as a browser backend for "git web-browse" + (hence to show "git help -w" output), when available. + + * "git grep" and "git show" pay attention to the "--textconv" option + when these commands are told to operate on blob objects (e.g. "git + grep -e pattern --textconv HEAD:Makefile"). + + * "git replace" helper no longer allows an object to be replaced with + another object of a different type to avoid confusion (you can + still manually craft such a replacement using "git update-ref", as an + escape hatch). + + * "git status" no longer prints the dirty status information of + submodules for which submodule.$name.ignore is set to "all". + + * "git rebase -i" honours core.abbrev when preparing the insn sheet + for editing. + + * "git status" during a cherry-pick shows which original commit is + being picked. + + * Instead of typing four capital letters "HEAD", you can say "@" now, + e.g. "git log @". + + * "git check-ignore" follows the same rule as "git add" and "git + status" in that the ignore/exclude mechanism does not take effect + on paths that are already tracked. With the "--no-index" option, it + can be used to diagnose which paths that should have been ignored + have been mistakenly added to the index. + + * Some irrelevant "advice" messages that are shared with "git status" + output have been removed from the commit log template. + + * "update-refs" learned a "--stdin" option to read multiple update + requests and perform them in an all-or-none fashion. + + * Just like "make -C <directory>", "git -C <directory> ..." tells Git + to go there before doing anything else. + + * Just like "git checkout -" knows to check out, and "git merge -" + knows to merge, the branch you were previously on, "git cherry-pick" + now understands "git cherry-pick -" to pick from the previous + branch. + + * "git status" now omits the prefix to make its output a comment in a + commit log editor, which is not necessary for human consumption. + Scripts that parse the output of "git status" are advised to use + "git status --porcelain" instead, as its format is stable and easier + to parse. + + * The ref syntax "foo^{tag}" (with the literal string "{tag}") peels a + tag ref to itself, i.e. it's a no-op., and fails if + "foo" is not a tag. "git rev-parse --verify v1.0^{tag}" is + a more convenient way than "test $(git cat-file -t v1.0) = tag" to + check if v1.0 is a tag. + + * "git branch -v -v" (and "git status") did not distinguish among a + branch that is not based on any other branch, a branch that is in + sync with its upstream branch, and a branch that is configured with an + upstream branch that no longer exists. + + * Earlier we started rejecting any attempt to add the 0{40} object name to + the index and to tree objects, but it sometimes is necessary to + allow this to be able to use tools like filter-branch to correct such + broken tree objects. "filter-branch" can again be used to do this. + + * "git config" did not provide a way to set or access numbers larger + than a native "int" on the platform; it now provides 64-bit signed + integers on all platforms. + + * "git pull --rebase" always chose to do the bog-standard flattening + rebase. You can tell it to run "rebase --preserve-merges" with + "git pull --rebase=preserve" or by + setting "pull.rebase" configuration to "preserve". + + * "git push --no-thin" actually disables the "thin pack transfer" + optimization. + + * Magic pathspecs like ":(icase)makefile" (matches both Makefile + and makefile) and ":(glob)foo/**/bar" (matches "bar" in "foo" + and any subdirectory of "foo") can be used in more places. + + * The "http.*" variables can now be specified for individual URLs. + For example, + + [http] + sslVerify = true + [http "https://weak.example.com/"] + sslVerify = false + + would flip http.sslVerify off only when talking to that specific + site. + + * "git mv A B" when moving a submodule has been taught to + relocate the submodule's working tree and to adjust the paths in the + .gitmodules file. + + * "git blame" can now take more than one -L option to discover the + origin of multiple blocks of lines. + + * The http transport clients can optionally ask to save cookies + with the http.savecookies configuration variable. + + * "git push" learned a more fine grained control over a blunt + "--force" when requesting a non-fast-forward update with the + "--force-with-lease=<refname>:<expected object name>" option. + + * "git diff --diff-filter=<classes of changes>" can now take + lowercase letters (e.g. "--diff-filter=d") to mean "show + everything but these classes". "git diff-files -q" is now a + deprecated synonym for "git diff-files --diff-filter=d". + + * "git fetch" (hence "git pull" as well) learned to check + "fetch.prune" and "remote.*.prune" configuration variables and + to behave as if the "--prune" command line option was given. + + * "git check-ignore -z" applied the NUL termination to both its input + (with --stdin) and its output, but "git check-attr -z" ignored the + option on the output side. Make both honor -z on the input and + output side the same way. + + * "git whatchanged" may still be used by old timers, but mention of + it in documents meant for new users will only waste readers' time + wondering what the difference is between it and "git log". Make it + less prominent in the general part of the documentation and explain + that it is merely a "git log" with different default behaviour in + its own document. + + +Performance, Internal Implementation, etc. + + * "git for-each-ref" when asking for merely the object name does not + have to parse the object pointed at by the refs; the codepath has + been optimized. + + * The HTTP transport will try to use TCP keepalive when able. + + * "git repack" is now written in C. + + * Build procedure for MSVC has been updated. + + * If a build-time fallback is set to "cat" instead of "less", we + should apply the same "no subprocess or pipe" optimization as we + apply to user-supplied GIT_PAGER=cat. + + * Many commands use a --dashed-option as an operation mode selector + (e.g. "git tag --delete") that excludes other operation modes + (e.g. "git tag --delete --verify" is nonsense) and that cannot be + negated (e.g. "git tag --no-delete" is nonsense). The parse-options + API learned a new OPT_CMDMODE macro to make it easier to implement + such a set of options. + + * OPT_BOOLEAN() in the parse-options API was misdesigned to be "counting + up" but many subcommands expect it to behave as "on/off". Update + them to use OPT_BOOL() which is a proper boolean. + + * "git gc" exits early without doing any work when it detects + that another instance of itself is already running. + + * Under memory pressure and/or file descriptor pressure, we used to + close pack windows that are not used and also closed filehandles to + open but unused packfiles. These are now controlled separately + to better cope with the load. + +Also contains various documentation updates and code clean-ups. + + +Fixes since v1.8.4 +------------------ + +Unless otherwise noted, all the fixes since v1.8.4 in the maintenance +track are contained in this release (see the maintenance releases' notes for +details). + + * An ancient How-To on serving Git repositories on an HTTP server + lacked a warning that it has been mostly superseded with a more + modern way. + (merge 6d52bc3 sc/doc-howto-dumb-http later to maint). + + * The interaction between the use of Perl in our test suite and NO_PERL + has been clarified a bit. + (merge f8fc0ee jn/test-prereq-perl-doc later to maint). + + * The synopsis section of the "git unpack-objects" documentation has been + clarified a bit. + (merge 61e2e22 vd/doc-unpack-objects later to maint). + + * We did not generate the HTML version of the documentation to "git subtree" + in contrib/. + (merge 95c62fb jk/subtree-install-fix later to maint). + + * A fast-import stream expresses a pathname with funny characters by + quoting them in C style; the remote-hg remote helper forgot to unquote + such a path. + (merge 1136265 ap/remote-hg-unquote-cquote later to maint). + + * "git reset -p HEAD" has a codepath to special-case it to behave + differently from resetting to contents of other commits, but a + recent change broke it. + + * Coloring around octopus merges in "log --graph" output was screwy. + (merge 339c17b hn/log-graph-color-octopus later to maint). + + * "git checkout topic", when there is not yet a local "topic" branch + but there is a unique remote-tracking branch for a remote "topic" + branch, pretended as if "git checkout -t -b topic remote/$r/topic" + (for that unique remote $r) was run. This hack however was not + implemented for "git checkout topic --". + (merge bca3969 mm/checkout-auto-track-fix later to maint). + + * One long-standing flaw in the pack transfer protocol used by "git + clone" was that there was no way to tell the other end which branch + "HEAD" points at, and the receiving end needed to guess. A new + capability has been defined in the pack protocol to convey this + information so that cloning from a repository with more than one + branch pointing at the same commit where the HEAD is at now + reliably sets the initial branch in the resulting repository. + (merge 360a326 jc/upload-pack-send-symref later to maint). + + * We did not handle cases where the http transport gets redirected during + the authorization request (e.g. from http:// to https://). + (merge 70900ed jk/http-auth-redirects later to maint). + + * Bash prompting code to deal with an SVN remote as an upstream + was coded in a way unsupported by older Bash versions (3.x). + (merge 52ec889 sg/prompt-svn-remote-fix later to maint). + + * The fall-back parsing of commit objects with broken author or + committer lines was less robust than ideal in picking up the + timestamps. + (merge 03818a4 jk/split-broken-ident later to maint). + + * "git rev-list --objects ^v1.0^ v1.0" gave the v1.0 tag itself in the + output, but "git rev-list --objects v1.0^..v1.0" did not. + (merge 895c5ba jc/revision-range-unpeel later to maint). + + * "git clone" wrote some progress messages to standard output, not + to standard error, and did not suppress them with the + --no-progress option. + (merge 643f918 jk/clone-progress-to-stderr later to maint). + + * "format-patch --from=<whom>" forgot to omit an unnecessary in-body + from line, i.e. when <whom> is the same as the real author. + (merge 662cc30 jk/format-patch-from later to maint). + + * "git shortlog" used to choke and die when there is a malformed + commit (e.g. missing authors); it now simply ignores such a commit + and keeps going. + (merge cd4f09e jk/shortlog-tolerate-broken-commit later to maint). + + * "git merge-recursive" did not parse its "--diff-algorithm=" command + line option correctly. + (merge 6562928 jk/diff-algo later to maint). + + * When running "fetch -q", a long silence while the sender side + computes the set of objects to send can be mistaken by proxies as + dropped connection. The server side has been taught to send a + small empty messages to keep the connection alive. + (merge 115dedd jk/upload-pack-keepalive later to maint). + + * "git rebase" had a portability regression in v1.8.4 that triggered a + bug in some BSD shell implementations. + (merge 99855dd mm/rebase-continue-freebsd-WB later to maint). + + * "git branch --track" had a minor regression in v1.8.3.2 and later + that made it impossible to base your local work on anything but a + local branch of the upstream repository you are tracking. + (merge b0f49ff jh/checkout-auto-tracking later to maint). + + * When the web server responds with "405 Method Not Allowed", "git + http-backend" should tell the client what methods are allowed with + the "Allow" header. + (merge 9247be0 bc/http-backend-allow-405 later to maint). + + * When there is no sufficient overlap between old and new history + during a "git fetch" into a shallow repository, objects that the + sending side knows the receiving end has were unnecessarily sent. + (merge f21d2a7 nd/fetch-into-shallow later to maint). + + * "git cvsserver" computed the permission mode bits incorrectly for + executable files. + (merge 1b48d56 jc/cvsserver-perm-bit-fix later to maint). + + * When send-email obtains an error message to die with upon + failure to start an SSL session, it tried to read the error string + from a wrong place. + (merge 6cb0c88 bc/send-email-ssl-die-message-fix later to maint). + + * The implementation of "add -i" has some crippling code to work around an + ActiveState Perl limitation but it by mistake also triggered on Git + for Windows where MSYS perl is used. + (merge df17e77 js/add-i-mingw later to maint). + + * We made sure that we notice when the user-supplied GIT_DIR is actually a + gitfile, but did not do the same when the default ".git" is a + gitfile. + (merge 487a2b7 nd/git-dir-pointing-at-gitfile later to maint). + + * When an object is not found after checking the packfiles and the + loose object directory, read_sha1_file() re-checks the packfiles to + prevent racing with a concurrent repacker; teach the same logic to + has_sha1_file(). + (merge 45e8a74 jk/has-sha1-file-retry-packed later to maint). + + * "git commit --author=$name", when $name is not in the canonical + "A. U. Thor <au.thor@example.xz>" format, looks for a matching name + from existing history, but did not consult mailmap to grab the + preferred author name. + (merge ea16794 ap/commit-author-mailmap later to maint). + + * "git ls-files -k" needs to crawl only the part of the working tree + that may overlap the paths in the index to find killed files, but + shared code with the logic to find all the untracked files, which + made it unnecessarily inefficient. + (merge 680be04 jc/ls-files-killed-optim later to maint). + + * The shortened commit object names in the insn sheet that is prepared at the + beginning of a "rebase -i" session can become ambiguous as the + rebasing progresses and the repository gains more commits. Make + sure the internal record is kept with full 40-hex object names. + (merge 75c6976 es/rebase-i-no-abbrev later to maint). + + * "git rebase --preserve-merges" internally used the merge machinery + and as a side effect left the merge summary message in the log, but + when rebasing there is no need for the merge summary. + (merge a9f739c rt/rebase-p-no-merge-summary later to maint). + + * A call to xread() was used without a loop around it to cope with short + reads in the codepath to stream new contents to a pack. + (merge e92527c js/xread-in-full later to maint). + + * "git rebase -i" forgot that the comment character is + configurable while reading its insn sheet. + (merge 7bca7af es/rebase-i-respect-core-commentchar later to maint). + + * The mailmap support code read past the allocated buffer when the + mailmap file ended with an incomplete line. + (merge f972a16 jk/mailmap-incomplete-line later to maint). + + * We used to send a large request to read(2)/write(2) as a single + system call, which was bad from the latency point of view when + the operation needs to be killed, and also triggered an error on + broken 64-bit systems that refuse to read or write more than 2GB + in one go. + (merge a487916 sp/clip-read-write-to-8mb later to maint). + + * "git fetch" that auto-followed tags incorrectly reused the + connection with Git-aware transport helper (like the sample "ext::" + helper shipped with Git). + (merge 0f73f8b jc/transport-do-not-use-connect-twice-in-fetch later to maint). + + * "git log --full-diff -- <pathspec>" showed a huge diff for paths + outside the given <pathspec> for each commit, instead of showing + the change relative to the parent of the commit. "git reflog -p" + had a similar problem. + (merge 838f9a1 tr/log-full-diff-keep-true-parents later to maint). + + * Setting a submodule.*.path configuration variable to true (without + giving "= value") caused Git to segfault. + (merge 4b05440 jl/some-submodule-config-are-not-boolean later to maint). + + * "git rebase -i" (there could be others, as the root cause is pretty + generic) fed a random, data dependent string to 'echo' and + expected it to come out literally, corrupting its error message. + (merge 89b0230 mm/no-shell-escape-in-die-message later to maint). + + * Some people still use rather old versions of bash, which cannot + grok some constructs like 'printf -v varname' which the prompt and + completion code started to use recently. + (merge a44aa69 bc/completion-for-bash-3.0 later to maint). + + * Code to read configuration from a blob object did not compile on + platforms with fgetc() etc. implemented as macros. + (merge 49d6cfa hv/config-from-blob later to maint-1.8.3). + + * The recent "short-cut clone connectivity check" topic broke a + shallow repository when a fetch operation tries to auto-follow tags. + (merge 6da8bdc nd/fetch-pack-shallow-fix later to maint-1.8.3). diff --git a/Documentation/RelNotes/1.9.0.txt b/Documentation/RelNotes/1.9.0.txt new file mode 100644 index 0000000..4e4b88a --- /dev/null +++ b/Documentation/RelNotes/1.9.0.txt @@ -0,0 +1,345 @@ +Git v1.9.0 Release Notes +======================== + +Backward compatibility notes +---------------------------- + +"git submodule foreach $cmd $args" used to treat "$cmd $args" the same +way "ssh" did, concatenating them into a single string and letting the +shell unquote. Careless users who forget to sufficiently quote $args +get their argument split at $IFS whitespaces by the shell, and got +unexpected results due to this. Starting from this release, the +command line is passed directly to the shell, if it has an argument. + +Read-only support for experimental loose-object format, in which users +could optionally choose to write their loose objects for a short +while between v1.4.3 and v1.5.3 era, has been dropped. + +The meanings of the "--tags" option to "git fetch" has changed; the +command fetches tags _in addition to_ what is fetched by the same +command line without the option. + +The way "git push $there $what" interprets the $what part given on the +command line, when it does not have a colon that explicitly tells us +what ref at the $there repository is to be updated, has been enhanced. + +A handful of ancient commands that have long been deprecated are +finally gone (repo-config, tar-tree, lost-found, and peek-remote). + + +Backward compatibility notes (for Git 2.0.0) +-------------------------------------------- + +When "git push [$there]" does not say what to push, we have used the +traditional "matching" semantics so far (all your branches were sent +to the remote as long as there already are branches of the same name +over there). In Git 2.0, the default will change to the "simple" +semantics, which pushes: + + - only the current branch to the branch with the same name, and only + when the current branch is set to integrate with that remote + branch, if you are pushing to the same remote as you fetch from; or + + - only the current branch to the branch with the same name, if you + are pushing to a remote that is not where you usually fetch from. + +Use the user preference configuration variable "push.default" to +change this. If you are an old-timer who is used to the "matching" +semantics, you can set the variable to "matching" to keep the +traditional behaviour. If you want to live in the future early, you +can set it to "simple" today without waiting for Git 2.0. + +When "git add -u" (and "git add -A") is run inside a subdirectory and +does not specify which paths to add on the command line, it +will operate on the entire tree in Git 2.0 for consistency +with "git commit -a" and other commands. There will be no +mechanism to make plain "git add -u" behave like "git add -u .". +Current users of "git add -u" (without a pathspec) should start +training their fingers to explicitly say "git add -u ." +before Git 2.0 comes. A warning is issued when these commands are +run without a pathspec and when you have local changes outside the +current directory, because the behaviour in Git 2.0 will be different +from today's version in such a situation. + +In Git 2.0, "git add <path>" will behave as "git add -A <path>", so +that "git add dir/" will notice paths you removed from the directory +and record the removal. Versions before Git 2.0, including this +release, will keep ignoring removals, but the users who rely on this +behaviour are encouraged to start using "git add --ignore-removal <path>" +now before 2.0 is released. + +The default prefix for "git svn" will change in Git 2.0. For a long +time, "git svn" created its remote-tracking branches directly under +refs/remotes, but it will place them under refs/remotes/origin/ unless +it is told otherwise with its --prefix option. + + +Updates since v1.8.5 +-------------------- + +Foreign interfaces, subsystems and ports. + + * The HTTP transport, when talking GSS-Negotiate, uses "100 + Continue" response to avoid having to rewind and resend a large + payload, which may not be always doable. + + * Various bugfixes to remote-bzr and remote-hg (in contrib/). + + * The build procedure is aware of MirBSD now. + + * Various "git p4", "git svn" and "gitk" updates. + + +UI, Workflows & Features + + * Fetching from a shallowly-cloned repository used to be forbidden, + primarily because the codepaths involved were not carefully vetted + and we did not bother supporting such usage. This release attempts + to allow object transfer out of a shallowly-cloned repository in a + more controlled way (i.e. the receiver becomes a shallow repository + with a truncated history). + + * Just like we give a reasonable default for "less" via the LESS + environment variable, we now specify a reasonable default for "lv" + via the "LV" environment variable when spawning the pager. + + * Two-level configuration variable names in "branch.*" and "remote.*" + hierarchies, whose variables are predominantly three-level, were + not completed by hitting a <TAB> in bash and zsh completions. + + * Fetching a 'frotz' branch with "git fetch", while a 'frotz/nitfol' + remote-tracking branch from an earlier fetch was still there, would + error out, primarily because the command was not told that it is + allowed to lose any information on our side. "git fetch --prune" + now can be used to remove 'frotz/nitfol' to make room for fetching and + storing the 'frotz' remote-tracking branch. + + * "diff.orderfile=<file>" configuration variable can be used to + pretend as if the "-O<file>" option were given from the command + line of "git diff", etc. + + * The negative pathspec syntax allows "git log -- . ':!dir'" to tell + us "I am interested in everything but 'dir' directory". + + * "git difftool" shows how many different paths there are in total, + and how many of them have been shown so far, to indicate progress. + + * "git push origin master" used to push our 'master' branch to update + the 'master' branch at the 'origin' repository. This has been + enhanced to use the same ref mapping "git push origin" would use to + determine what ref at the 'origin' to be updated with our 'master'. + For example, with this configuration + + [remote "origin"] + push = refs/heads/*:refs/review/* + + that would cause "git push origin" to push out our local branches + to corresponding refs under refs/review/ hierarchy at 'origin', + "git push origin master" would update 'refs/review/master' over + there. Alternatively, if push.default is set to 'upstream' and our + 'master' is set to integrate with 'topic' from the 'origin' branch, + running "git push origin" while on our 'master' would update their + 'topic' branch, and running "git push origin master" while on any + of our branches does the same. + + * "gitweb" learned to treat ref hierarchies other than refs/heads as + if they are additional branch namespaces (e.g. refs/changes/ in + Gerrit). + + * "git for-each-ref --format=..." learned a few formatting directives; + e.g. "%(color:red)%(HEAD)%(color:reset) %(refname:short) %(subject)". + + * The command string given to "git submodule foreach" is passed + directly to the shell, without being eval'ed. This is a backward + incompatible change that may break existing users. + + * "git log" and friends learned the "--exclude=<glob>" option, to + allow people to say "list history of all branches except those that + match this pattern" with "git log --exclude='*/*' --branches". + + * "git rev-parse --parseopt" learned a new "--stuck-long" option to + help scripts parse options with an optional parameter. + + * The "--tags" option to "git fetch" no longer tells the command to + fetch _only_ the tags. It instead fetches tags _in addition to_ + what are fetched by the same command line without the option. + + +Performance, Internal Implementation, etc. + + * When parsing a 40-hex string into the object name, the string is + checked to see if it can be interpreted as a ref so that a warning + can be given for ambiguity. The code kicked in even when the + core.warnambiguousrefs is set to false to squelch this warning, in + which case the cycles spent to look at the ref namespace were an + expensive no-op, as the result was discarded without being used. + + * The naming convention of the packfiles has been updated; it used to + be based on the enumeration of names of the objects that are + contained in the pack, but now it also depends on how the packed + result is represented--packing the same set of objects using + different settings (or delta order) would produce a pack with + different name. + + * "git diff --no-index" mode used to unnecessarily attempt to read + the index when there is one. + + * The deprecated parse-options macro OPT_BOOLEAN has been removed; + use OPT_BOOL or OPT_COUNTUP in new code. + + * A few duplicate implementations of prefix/suffix string comparison + functions have been unified to starts_with() and ends_with(). + + * The new PERLLIB_EXTRA makefile variable can be used to specify + additional directories Perl modules (e.g. the ones necessary to run + git-svn) are installed on the platform when building. + + * "git merge-base" learned the "--fork-point" mode, that implements + the same logic used in "git pull --rebase" to find a suitable fork + point out of the reflog entries for the remote-tracking branch the + work has been based on. "git rebase" has the same logic that can be + triggered with the "--fork-point" option. + + * A third-party "receive-pack" (the responder to "git push") can + advertise the "no-thin" capability to tell "git push" not to use + the thin-pack optimization. Our receive-pack has always been + capable of accepting and fattening a thin-pack, and will continue + not to ask "git push" to use a non-thin pack. + + +Also contains various documentation updates and code clean-ups. + + +Fixes since v1.8.5 +------------------ + +Unless otherwise noted, all the fixes since v1.8.5 in the maintenance +track are contained in this release (see the maintenance releases' notes +for details). + + * The pathspec matching code, while comparing two trees (e.g. "git + diff A B -- path1 path2") was too aggressive and failed to match + some paths when multiple pathspecs were involved. + + * "git repack --max-pack-size=8g" stopped being parsed correctly when + the command was reimplemented in C. + + * An earlier update in v1.8.4.x to "git rev-list --objects" with + negative ref had a performance regression. + (merge 200abe7 jk/mark-edges-uninteresting later to maint). + + * A recent update to "git send-email" broke platforms where + /etc/ssl/certs/ directory exists but cannot be used as SSL_ca_path + (e.g. Fedora rawhide). + + * A handful of bugs around interpreting $branch@{upstream} notation + and its lookalike, when $branch part has interesting characters, + e.g. "@", and ":", have been fixed. + + * "git clone" would fail to clone from a repository that has a ref + directly under "refs/", e.g. "refs/stash", because different + validation paths do different things on such a refname. Loosen the + client side's validation to allow such a ref. + + * "git log --left-right A...B" lost the "leftness" of commits + reachable from A when A is a tag as a side effect of a recent + bugfix. This is a regression in 1.8.4.x series. + + * documentations to "git pull" hinted there is an "-m" option because + it incorrectly shared the documentation with "git merge". + + * "git diff A B submod" and "git diff A B submod/" ought to have done + the same for a submodule "submod", but didn't. + + * "git clone $origin foo\bar\baz" on Windows failed to create the + leading directories (i.e. a moral-equivalent of "mkdir -p"). + + * "submodule.*.update=checkout", when propagated from .gitmodules to + .git/config, turned into a "submodule.*.update=none", which did not + make much sense. + (merge efa8fd7 fp/submodule-checkout-mode later to maint). + + * The implementation of 'git stash $cmd "stash@{...}"' did not quote + the stash argument properly and left it split at IFS whitespace. + + * The "--[no-]informative-errors" options to "git daemon" were parsed + a bit too loosely, allowing any other string after these option + names. + + * There is no reason to have a hardcoded upper limit for the number of + parents of an octopus merge, created via the graft mechanism, but + there was. + + * The basic test used to leave unnecessary trash directories in the + t/ directory. + (merge 738a8be jk/test-framework-updates later to maint). + + * "git merge-base --octopus" used to leave cleaning up suboptimal + result to the caller, but now it does the clean-up itself. + + * A "gc" process running as a different user should be able to stop a + new "gc" process from starting, but it didn't. + + * An earlier "clean-up" introduced an unnecessary memory leak. + + * "git add -A" (no other arguments) in a totally empty working tree + used to emit an error. + + * "git log --decorate" did not handle a tag pointed by another tag + nicely. + + * When we figure out how many file descriptors to allocate for + keeping packfiles open, a system with non-working getrlimit() could + cause us to die(), but because we make this call only to get a + rough estimate of how many are available and we do not even attempt + to use up all available file descriptors ourselves, it is nicer to + fall back to a reasonable low value rather than dying. + + * read_sha1_file(), that is the workhorse to read the contents given + an object name, honoured object replacements, but there was no + corresponding mechanism to sha1_object_info() that was used to + obtain the metainfo (e.g. type & size) about the object. This led + callers to weird inconsistencies. + (merge 663a856 cc/replace-object-info later to maint). + + * "git cat-file --batch=", an admittedly useless command, did not + behave very well. + + * "git rev-parse <revs> -- <paths>" did not implement the usual + disambiguation rules the commands in the "git log" family used in + the same way. + + * "git mv A B/", when B does not exist as a directory, should error + out, but it didn't. + + * A workaround to an old bug in glibc prior to glibc 2.17 has been + retired; this would remove a side effect of the workaround that + corrupts system error messages in non-C locales. + + * SSL-related options were not passed correctly to underlying socket + layer in "git send-email". + + * "git commit -v" appends the patch to the log message before + editing, and then removes the patch when the editor returned + control. However, the patch was not stripped correctly when the + first modified path was a submodule. + + * "git fetch --depth=0" was a no-op, and was silently ignored. + Diagnose it as an error. + + * Remote repository URLs expressed in scp-style host:path notation are + parsed more carefully (e.g. "foo/bar:baz" is local, "[::1]:/~user" asks + to connect to user's home directory on host at address ::1. + + * "git diff -- ':(icase)makefile'" was unnecessarily rejected at the + command line parser. + + * "git cat-file --batch-check=ok" did not check the existence of + the named object. + + * "git am --abort" sometimes complained about not being able to write + a tree with an 0{40} object in it. + + * Two processes creating loose objects at the same time could have + failed unnecessarily when the name of their new objects started + with the same byte value, due to a race condition. diff --git a/Documentation/RelNotes/1.9.1.txt b/Documentation/RelNotes/1.9.1.txt new file mode 100644 index 0000000..5b06020 --- /dev/null +++ b/Documentation/RelNotes/1.9.1.txt @@ -0,0 +1,59 @@ +Git v1.9.1 Release Notes +======================== + +Fixes since v1.9.0 +------------------ + + * "git clean -d pathspec" did not use the given pathspec correctly + and ended up cleaning too much. + + * "git difftool" misbehaved when the repository is bound to the + working tree with the ".git file" mechanism, where a textual file + ".git" tells us where it is. + + * "git push" did not pay attention to branch.*.pushremote if it is + defined earlier than remote.pushdefault; the order of these two + variables in the configuration file should not matter, but it did + by mistake. + + * Codepaths that parse timestamps in commit objects have been + tightened. + + * "git diff --external-diff" incorrectly fed the submodule directory + in the working tree to the external diff driver when it knew it is + the same as one of the versions being compared. + + * "git reset" needs to refresh the index when working in a working + tree (it can also be used to match the index to the HEAD in an + otherwise bare repository), but it failed to set up the working + tree properly, causing GIT_WORK_TREE to be ignored. + + * "git check-attr" when working on a repository with a working tree + did not work well when the working tree was specified via the + --work-tree (and obviously with --git-dir) option. + + * "merge-recursive" was broken in 1.7.7 era and stopped working in + an empty (temporary) working tree, when there are renames + involved. This has been corrected. + + * "git rev-parse" was loose in rejecting command line arguments + that do not make sense, e.g. "--default" without the required + value for that option. + + * include.path variable (or any variable that expects a path that + can use ~username expansion) in the configuration file is not a + boolean, but the code failed to check it. + + * "git diff --quiet -- pathspec1 pathspec2" sometimes did not return + correct status value. + + * Attempting to deepen a shallow repository by fetching over smart + HTTP transport failed in the protocol exchange, when no-done + extension was used. The fetching side waited for the list of + shallow boundary commits after the sending end stopped talking to + it. + + * Allow "git cmd path/", when the 'path' is where a submodule is + bound to the top-level working tree, to match 'path', despite the + extra and unnecessary trailing slash (such a slash is often + given by command line completion). diff --git a/Documentation/RelNotes/1.9.2.txt b/Documentation/RelNotes/1.9.2.txt new file mode 100644 index 0000000..47a34ca --- /dev/null +++ b/Documentation/RelNotes/1.9.2.txt @@ -0,0 +1,67 @@ +Git v1.9.2 Release Notes +======================== + +Fixes since v1.9.1 +------------------ + + * Documentation and in-code comments had many instances of mistaken + use of "nor", which have been corrected. + + * "git fetch --prune", when the right-hand-side of multiple fetch + refspecs overlap (e.g. storing "refs/heads/*" to + "refs/remotes/origin/*", while storing "refs/frotz/*" to + "refs/remotes/origin/fr/*"), aggressively thought that lack of + "refs/heads/fr/otz" on the origin site meant we should remove + "refs/remotes/origin/fr/otz" from us, without checking their + "refs/frotz/otz" first. + + Note that such a configuration is inherently unsafe (think what + should happen when "refs/heads/fr/otz" does appear on the origin + site), but that is not a reason not to be extra careful. + + * "git update-ref --stdin" did not fail a request to create a ref + when the ref already existed. + + * "git diff --no-index -Mq a b" fell into an infinite loop. + + * When it is not necessary to edit a commit log message (e.g. "git + commit -m" is given a message without specifying "-e"), we used to + disable the spawning of the editor by overriding GIT_EDITOR, but + this means all the uses of the editor, other than to edit the + commit log message, are also affected. + + * "git status --porcelain --branch" showed its output with labels + "ahead/behind/gone" translated to the user's locale. + + * "git mv" that moves a submodule forgot to adjust the array that + uses to keep track of which submodules were to be moved to update + its configuration. + + * Length limit for the pathname used when removing a path in a deep + subdirectory has been removed to avoid buffer overflows. + + * The test helper lib-terminal always run an actual test_expect_* + when included, which screwed up with the use of skil-all that may + have to be done later. + + * "git index-pack" used a wrong variable to name the keep-file in an + error message when the file cannot be written or closed. + + * "rebase -i" produced a broken insn sheet when the title of a commit + happened to contain '\n' (or ended with '\c') due to a careless use + of 'echo'. + + * There were a few instances of 'git-foo' remaining in the + documentation that should have been spelled 'git foo'. + + * Serving objects from a shallow repository needs to write a + new file to hold the temporary shallow boundaries but it was not + cleaned when we exit due to die() or a signal. + + * When "git stash pop" stops after failing to apply the stash + (e.g. due to conflicting changes), the stash is not dropped. State + that explicitly in the output to let the users know. + + * The labels in "git status" output that describe the nature of + conflicts (e.g. "both deleted") were limited to 20 bytes, which was + too short for some l10n (e.g. fr). diff --git a/Documentation/RelNotes/1.9.3.txt b/Documentation/RelNotes/1.9.3.txt new file mode 100644 index 0000000..17b05ca --- /dev/null +++ b/Documentation/RelNotes/1.9.3.txt @@ -0,0 +1,21 @@ +Git v1.9.3 Release Notes +======================== + +Fixes since v1.9.2 +------------------ + + * "git p4" dealing with changes in binary files were broken by a + change in 1.9 release. + + * The shell prompt script (in contrib/), when using the PROMPT_COMMAND + interface, used an unsafe construct when showing the branch name in + $PS1. + + * "git rebase" used a POSIX shell construct FreeBSD /bin/sh does not + work well with. + + * Some more Unicode codepoints defined in Unicode 6.3 as having + zero width have been taught to our display column counting logic. + + * Some tests used shell constructs that did not work well on + FreeBSD. diff --git a/Documentation/RelNotes/1.9.4.txt b/Documentation/RelNotes/1.9.4.txt new file mode 100644 index 0000000..e1d1835 --- /dev/null +++ b/Documentation/RelNotes/1.9.4.txt @@ -0,0 +1,16 @@ +Git v1.9.4 Release Notes +======================== + +Fixes since v1.9.3 +------------------ + + * Commands that take pathspecs on the command line misbehaved when + the pathspec is given as an absolute pathname (which is a + practice not particularly encouraged) that points at a symbolic + link in the working tree. + + * An earlier fix to the shell prompt script (in contrib/) for using + the PROMPT_COMMAND interface did not correctly check if the extra + code path needs to trigger, causing the branch name not to appear + when 'promptvars' option is disabled in bash or PROMPT_SUBST is + unset in zsh. diff --git a/Documentation/RelNotes/1.9.5.txt b/Documentation/RelNotes/1.9.5.txt new file mode 100644 index 0000000..8d6ac0c --- /dev/null +++ b/Documentation/RelNotes/1.9.5.txt @@ -0,0 +1,34 @@ +Git v1.9.5 Release Notes +======================== + +Fixes since v1.9.4 +------------------ + + * We used to allow committing a path ".Git/config" with Git that is + running on a case sensitive filesystem, but an attempt to check out + such a path with Git that runs on a case insensitive filesystem + would have clobbered ".git/config", which is definitely not what + the user would have expected. Git now prevents you from tracking + a path with ".Git" (in any case combination) as a path component. + + * On Windows, certain path components that are different from ".git" + are mapped to ".git", e.g. "git~1/config" is treated as if it were + ".git/config". HFS+ has a similar issue, where certain unicode + codepoints are ignored, e.g. ".g\u200cit/config" is treated as if + it were ".git/config". Pathnames with these potential issues are + rejected on the affected systems. Git on systems that are not + affected by this issue (e.g. Linux) can also be configured to + reject them to ensure cross platform interoperability of the hosted + projects. + + * "git fsck" notices a tree object that records such a path that can + be confused with ".git", and with receive.fsckObjects configuration + set to true, an attempt to "git push" such a tree object will be + rejected. Such a path may not be a problem on a well behaving + filesystem but in order to protect those on HFS+ and on case + insensitive filesystems, this check is enabled on all platforms. + +A big "thanks!" for bringing this issue to us goes to our friends in +the Mercurial land, namely, Matt Mackall and Augie Fackler. + +Also contains typofixes, documentation updates and trivial code clean-ups. diff --git a/Documentation/RelNotes/2.0.0.txt b/Documentation/RelNotes/2.0.0.txt new file mode 100644 index 0000000..2617372 --- /dev/null +++ b/Documentation/RelNotes/2.0.0.txt @@ -0,0 +1,364 @@ +Git v2.0 Release Notes +====================== + +Backward compatibility notes +---------------------------- + +When "git push [$there]" does not say what to push, we have used the +traditional "matching" semantics so far (all your branches were sent +to the remote as long as there already are branches of the same name +over there). In Git 2.0, the default is now the "simple" semantics, +which pushes: + + - only the current branch to the branch with the same name, and only + when the current branch is set to integrate with that remote + branch, if you are pushing to the same remote as you fetch from; or + + - only the current branch to the branch with the same name, if you + are pushing to a remote that is not where you usually fetch from. + +You can use the configuration variable "push.default" to change +this. If you are an old-timer who wants to keep using the +"matching" semantics, you can set the variable to "matching", for +example. Read the documentation for other possibilities. + +When "git add -u" and "git add -A" are run inside a subdirectory +without specifying which paths to add on the command line, they +operate on the entire tree for consistency with "git commit -a" and +other commands (these commands used to operate only on the current +subdirectory). Say "git add -u ." or "git add -A ." if you want to +limit the operation to the current directory. + +"git add <path>" is the same as "git add -A <path>" now, so that +"git add dir/" will notice paths you removed from the directory and +record the removal. In older versions of Git, "git add <path>" used +to ignore removals. You can say "git add --ignore-removal <path>" to +add only added or modified paths in <path>, if you really want to. + +The "-q" option to "git diff-files", which does *NOT* mean "quiet", +has been removed (it told Git to ignore deletion, which you can do +with "git diff-files --diff-filter=d"). + +"git request-pull" lost a few "heuristics" that often led to mistakes. + +The default prefix for "git svn" has changed in Git 2.0. For a long +time, "git svn" created its remote-tracking branches directly under +refs/remotes, but it now places them under refs/remotes/origin/ unless +it is told otherwise with its "--prefix" option. + + +Updates since v1.9 series +------------------------- + +UI, Workflows & Features + + * The "multi-mail" post-receive hook (in contrib/) has been updated + to a more recent version from upstream. + + * The "remote-hg/bzr" remote-helper interfaces (used to be in + contrib/) are no more. They are now maintained separately as + third-party plug-ins in their own repositories. + + * "git gc --aggressive" learned "--depth" option and + "gc.aggressiveDepth" configuration variable to allow use of a less + insane depth than the built-in default value of 250. + + * "git log" learned the "--show-linear-break" option to show where a + single strand-of-pearls is broken in its output. + + * The "rev-parse --parseopt" mechanism used by scripted Porcelains to + parse command-line options and to give help text learned to take + the argv-help (the placeholder string for an option parameter, + e.g. "key-id" in "--gpg-sign=<key-id>"). + + * The pattern to find where the function begins in C/C++ used in + "diff" and "grep -p" has been updated to improve viewing C++ + sources. + + * "git rebase" learned to interpret a lone "-" as "@{-1}", the + branch that we were previously on. + + * "git commit --cleanup=<mode>" learned a new mode, scissors. + + * "git tag --list" output can be sorted using "version sort" with + "--sort=version:refname". + + * Discard the accumulated "heuristics" to guess from which branch the + result wants to be pulled from and make sure that what the end user + specified is not second-guessed by "git request-pull", to avoid + mistakes. When you pushed out your 'master' branch to your public + repository as 'for-linus', use the new "master:for-linus" syntax to + denote the branch to be pulled. + + * "git grep" learned to behave in a way similar to native grep when + "-h" (no header) and "-c" (count) options are given. + + * "git push" via transport-helper interface has been updated to + allow forced ref updates in a way similar to the natively + supported transports. + + * The "simple" mode is the default for "git push". + + * "git add -u" and "git add -A", when run without any pathspec, is a + tree-wide operation even when run inside a subdirectory of a + working tree. + + * "git add <path>" is the same as "git add -A <path>" now. + + * "core.statinfo" configuration variable, which is a + never-advertised synonym to "core.checkstat", has been removed. + + * The "-q" option to "git diff-files", which does *NOT* mean + "quiet", has been removed (it told Git to ignore deletion, which + you can do with "git diff-files --diff-filter=d"). + + * Server operators can loosen the "tips of refs only" restriction for + the remote archive service with the uploadarchive.allowUnreachable + configuration option. + + * The progress indicators from various time-consuming commands have + been marked for i18n/l10n. + + * "git notes -C <blob>" diagnoses as an error an attempt to use an + object that is not a blob. + + * "git config" learned to read from the standard input when "-" is + given as the value to its "--file" parameter (attempting an + operation to update the configuration in the standard input is + rejected, of course). + + * Trailing whitespaces in .gitignore files, unless they are quoted + for fnmatch(3), e.g. "path\ ", are warned and ignored. Strictly + speaking, this is a backward-incompatible change, but very unlikely + to bite any sane user and adjusting should be obvious and easy. + + * Many commands that create commits, e.g. "pull" and "rebase", + learned to take the "--gpg-sign" option on the command line. + + * "git commit" can be told to always GPG sign the resulting commit + by setting the "commit.gpgsign" configuration variable to "true" + (the command-line option "--no-gpg-sign" should override it). + + * "git pull" can be told to only accept fast-forward by setting the + new "pull.ff" configuration variable. + + * "git reset" learned the "-N" option, which does not reset the index + fully for paths the index knows about but the tree-ish the command + resets to does not (these paths are kept as intend-to-add entries). + + +Performance, Internal Implementation, etc. + + * The compilation options to port to AIX and to MSVC have been + updated. + + * We started using wildmatch() in place of fnmatch(3) a few releases + ago; complete the process and stop using fnmatch(3). + + * Uses of curl's "multi" interface and "easy" interface do not mix + well when we attempt to reuse outgoing connections. Teach the RPC + over HTTP code, used in the smart HTTP transport, not to use the + "easy" interface. + + * The bitmap-index feature from JGit has been ported, which should + significantly improve performance when serving objects from a + repository that uses it. + + * The way "git log --cc" shows a combined diff against multiple + parents has been optimized. + + * The prefixcmp() and suffixcmp() functions are gone. Use + starts_with() and ends_with(), and also consider if skip_prefix() + suits your needs better when using the former. + + +Also contains various documentation updates and code clean-ups. Many +of them came from flurry of activities as GSoC candidate microproject +exercises. + + +Fixes since v1.9 series +----------------------- + +Unless otherwise noted, all the fixes since v1.9 in the maintenance +track are contained in this release (see the maintenance releases' +notes for details). + + * "git p4" was broken in 1.9 release to deal with changes in binary + files. + (merge 749b668 cl/p4-use-diff-tree later to maint). + + * The shell prompt script (in contrib/), when using the PROMPT_COMMAND + interface, used an unsafe construct when showing the branch name in + $PS1. + (merge 1e4119c8 rh/prompt-pcmode-avoid-eval-on-refname later to maint). + + * "git rebase" used a POSIX shell construct FreeBSD's /bin/sh does not + work well with. + (merge 8cd6596 km/avoid-non-function-return-in-rebase later to maint). + + * zsh prompt (in contrib/) leaked unnecessary error messages. + + * Bash completion (in contrib/) did not complete the refs and remotes + correctly given "git pu<TAB>" when "pu" is aliased to "push". + + * Some more Unicode code points, defined in Unicode 6.3 as having zero + width, have been taught to our display column counting logic. + (merge d813ab9 tb/unicode-6.3-zero-width later to maint). + + * Some tests used shell constructs that did not work well on FreeBSD + (merge ff7a1c6 km/avoid-bs-in-shell-glob later to maint). + (merge 00764ca km/avoid-cp-a later to maint). + + * "git update-ref --stdin" did not fail a request to create a ref + when the ref already existed. + (merge b9d56b5 mh/update-ref-batch-create-fix later to maint). + + * "git diff --no-index -Mq a b" fell into an infinite loop. + (merge ad1c3fb jc/fix-diff-no-index-diff-opt-parse later to maint). + + * "git fetch --prune", when the right-hand side of multiple fetch + refspecs overlap (e.g. storing "refs/heads/*" to + "refs/remotes/origin/*", while storing "refs/frotz/*" to + "refs/remotes/origin/fr/*"), aggressively thought that lack of + "refs/heads/fr/otz" on the origin site meant we should remove + "refs/remotes/origin/fr/otz" from us, without checking their + "refs/frotz/otz" first. + + Note that such a configuration is inherently unsafe (think what + should happen when "refs/heads/fr/otz" does appear on the origin + site), but that is not a reason not to be extra careful. + (merge e6f6371 cn/fetch-prune-overlapping-destination later to maint). + + * "git status --porcelain --branch" showed its output with labels + "ahead/behind/gone" translated to the user's locale. + (merge 7a76c28 mm/status-porcelain-format-i18n-fix later to maint). + + * A stray environment variable $prefix could have leaked into and + affected the behaviour of the "subtree" script (in contrib/). + + * When it is not necessary to edit a commit log message (e.g. "git + commit -m" is given a message without specifying "-e"), we used to + disable the spawning of the editor by overriding GIT_EDITOR, but + this means all the uses of the editor, other than to edit the + commit log message, are also affected. + (merge b549be0 bp/commit-p-editor later to maint). + + * "git mv" that moves a submodule forgot to adjust the array that + uses to keep track of which submodules were to be moved to update + its configuration. + (merge fb8a4e8 jk/mv-submodules-fix later to maint). + + * Length limit for the pathname used when removing a path in a deep + subdirectory has been removed to avoid buffer overflows. + (merge 2f29e0c mh/remove-subtree-long-pathname-fix later to maint). + + * The test helper lib-terminal always run an actual test_expect_* + when included, which screwed up with the use of skil-all that may + have to be done later. + (merge 7e27173 jk/lib-terminal-lazy later to maint). + + * "git index-pack" used a wrong variable to name the keep-file in an + error message when the file cannot be written or closed. + (merge de983a0 nd/index-pack-error-message later to maint). + + * "rebase -i" produced a broken insn sheet when the title of a commit + happened to contain '\n' (or ended with '\c') due to a careless use + of 'echo'. + (merge cb1aefd us/printf-not-echo later to maint). + + * There were a few instances of 'git-foo' remaining in the + documentation that should have been spelled 'git foo'. + (merge 3c3e6f5 rr/doc-merge-strategies later to maint). + + * Serving objects from a shallow repository needs to write a + new file to hold the temporary shallow boundaries, but it was not + cleaned when we exit due to die() or a signal. + (merge 7839632 jk/shallow-update-fix later to maint). + + * When "git stash pop" stops after failing to apply the stash + (e.g. due to conflicting changes), the stash is not dropped. State + that explicitly in the output to let the users know. + (merge 2d4c993 jc/stash-pop-not-popped later to maint). + + * The labels in "git status" output that describe the nature of + conflicts (e.g. "both deleted") were limited to 20 bytes, which was + too short for some l10n (e.g. fr). + (merge c7cb333 jn/wt-status later to maint). + + * "git clean -d pathspec" did not use the given pathspec correctly + and ended up cleaning too much. + (merge 1f2e108 jk/clean-d-pathspec later to maint). + + * "git difftool" misbehaved when the repository is bound to the + working tree with the ".git file" mechanism, where a textual file + ".git" tells us where it is. + (merge fcfec8b da/difftool-git-files later to maint). + + * "git push" did not pay attention to "branch.*.pushremote" if it is + defined earlier than "remote.pushdefault"; the order of these two + variables in the configuration file should not matter, but it did + by mistake. + (merge 98b406f jk/remote-pushremote-config-reading later to maint). + + * Code paths that parse timestamps in commit objects have been + tightened. + (merge f80d1f9 jk/commit-dates-parsing-fix later to maint). + + * "git diff --external-diff" incorrectly fed the submodule directory + in the working tree to the external diff driver when it knew that it + is the same as one of the versions being compared. + (merge aba4727 tr/diff-submodule-no-reuse-worktree later to maint). + + * "git reset" needs to refresh the index when working in a working + tree (it can also be used to match the index to the HEAD in an + otherwise bare repository), but it failed to set up the working + tree properly, causing GIT_WORK_TREE to be ignored. + (merge b7756d4 nd/reset-setup-worktree later to maint). + + * "git check-attr" when working on a repository with a working tree + did not work well when the working tree was specified via the + "--work-tree" (and obviously with "--git-dir") option. + (merge cdbf623 jc/check-attr-honor-working-tree later to maint). + + * "merge-recursive" was broken in 1.7.7 era and stopped working in + an empty (temporary) working tree, when there are renames + involved. This has been corrected. + (merge 6e2068a bk/refresh-missing-ok-in-merge-recursive later to maint.) + + * "git rev-parse" was loose in rejecting command-line arguments + that do not make sense, e.g. "--default" without the required + value for that option. + (merge a43219f ds/rev-parse-required-args later to maint.) + + * "include.path" variable (or any variable that expects a path that + can use ~username expansion) in the configuration file is not a + boolean, but the code failed to check it. + (merge 67beb60 jk/config-path-include-fix later to maint.) + + * Commands that take pathspecs on the command line misbehaved when + the pathspec is given as an absolute pathname (which is a + practice not particularly encouraged) that points at a symbolic + link in the working tree. + (merge 6127ff6 mw/symlinks later to maint.) + + * "git diff --quiet -- pathspec1 pathspec2" sometimes did not return + the correct status value. + (merge f34b205 nd/diff-quiet-stat-dirty later to maint.) + + * Attempting to deepen a shallow repository by fetching over smart + HTTP transport failed in the protocol exchange, when the no-done + extension was used. The fetching side waited for the list of + shallow boundary commits after the sending side stopped talking to + it. + (merge 0232852 nd/http-fetch-shallow-fix later to maint.) + + * Allow "git cmd path/", when the 'path' is where a submodule is + bound to the top-level working tree, to match 'path', despite the + extra and unnecessary trailing slash (such a slash is often + given by command-line completion). + (merge 2e70c01 nd/submodule-pathspec-ending-with-slash later to maint.) + + * Documentation and in-code comments had many instances of mistaken + use of "nor", which have been corrected. + (merge 235e8d5 jl/nor-or-nand-and later to maint). diff --git a/Documentation/RelNotes/2.0.1.txt b/Documentation/RelNotes/2.0.1.txt new file mode 100644 index 0000000..ce5579d --- /dev/null +++ b/Documentation/RelNotes/2.0.1.txt @@ -0,0 +1,115 @@ +Git v2.0.1 Release Notes +======================== + + * We used to unconditionally disable the pager in the pager process + we spawn to feed out output, but that prevented people who want to + run "less" within "less" from doing so. + + * Tools that read diagnostic output in our standard error stream do + not want to see terminal control sequence (e.g. erase-to-eol). + Detect them by checking if the standard error stream is connected + to a tty. + * Reworded the error message given upon a failure to open an existing + loose object file due to e.g. permission issues; it was reported as + the object being corrupt, but that is not quite true. + + * "git log -2master" is a common typo that shows two commits starting + from whichever random branch that is not 'master' that happens to + be checked out currently. + + * The "%<(10,trunc)%s" pretty format specifier in the log family of + commands is used to truncate the string to a given length (e.g. 10 + in the example) with padding to column-align the output, but did + not take into account that number of bytes and number of display + columns are different. + + * The "mailmap.file" configuration option did not support the tilde + expansion (i.e. ~user/path and ~/path). + + * The completion scripts (in contrib/) did not know about quite a few + options that are common between "git merge" and "git pull", and a + couple of options unique to "git merge". + + * "--ignore-space-change" option of "git apply" ignored the spaces + at the beginning of line too aggressively, which is inconsistent + with the option of the same name "diff" and "git diff" have. + + * "git blame" miscounted number of columns needed to show localized + timestamps, resulting in jaggy left-side-edge of the source code + lines in its output. + + * "git blame" assigned the blame to the copy in the working-tree if + the repository is set to core.autocrlf=input and the file used CRLF + line endings. + + * "git commit --allow-empty-message -C $commit" did not work when the + commit did not have any log message. + + * "git diff --find-copies-harder" sometimes pretended as if the mode + bits have changed for paths that are marked with assume-unchanged + bit. + + * "git format-patch" did not enforce the rule that the "--follow" + option from the log/diff family of commands must be used with + exactly one pathspec. + + * "git gc --auto" was recently changed to run in the background to + give control back early to the end-user sitting in front of the + terminal, but it forgot that housekeeping involving reflogs should + be done without other processes competing for accesses to the refs. + + * "git grep -O" to show the lines that hit in the pager did not work + well with case insensitive search. We now spawn "less" with its + "-I" option when it is used as the pager (which is the default). + + * We used to disable threaded "git index-pack" on platforms without + thread-safe pread(); use a different workaround for such + platforms to allow threaded "git index-pack". + + * The error reporting from "git index-pack" has been improved to + distinguish missing objects from type errors. + + * "git mailinfo" used to read beyond the end of header string while + parsing an incoming e-mail message to extract the patch. + + * On a case insensitive filesystem, merge-recursive incorrectly + deleted the file that is to be renamed to a name that is the same + except for case differences. + + * "git pack-objects" unnecessarily copied the previous contents when + extending the hashtable, even though it will populate the table + from scratch anyway. + + * "git rerere forget" did not work well when merge.conflictstyle + was set to a non-default value. + + * "git remote rm" and "git remote prune" can involve removing many + refs at once, which is not a very efficient thing to do when very + many refs exist in the packed-refs file. + + * "git log --exclude=<glob> --all | git shortlog" worked as expected, + but "git shortlog --exclude=<glob> --all", which is supposed to be + identical to the above pipeline, was not accepted at the command + line argument parser level. + + * The autostash mode of "git rebase -i" did not restore the dirty + working tree state if the user aborted the interactive rebase by + emptying the insn sheet. + + * "git show -s" (i.e. show log message only) used to incorrectly emit + an extra blank line after a merge commit. + + * "git status", even though it is a read-only operation, tries to + update the index with refreshed lstat(2) info to optimize future + accesses to the working tree opportunistically, but this could + race with a "read-write" operation that modify the index while it + is running. Detect such a race and avoid overwriting the index. + + * "git status" (and "git commit") behaved as if changes in a modified + submodule are not there if submodule.*.ignore configuration is set, + which was misleading. The configuration is only to unclutter diff + output during the course of development, and should not to hide + changes in the "status" output to cause the users forget to commit + them. + + * The mode to run tests with HTTP server tests disabled was broken. diff --git a/Documentation/RelNotes/2.0.2.txt b/Documentation/RelNotes/2.0.2.txt new file mode 100644 index 0000000..8e8321b --- /dev/null +++ b/Documentation/RelNotes/2.0.2.txt @@ -0,0 +1,32 @@ +Git v2.0.2 Release Notes +======================== + + * Documentation for "git submodule sync" forgot to say that the subcommand + can take the "--recursive" option. + + * Mishandling of patterns in .gitignore that has trailing SPs quoted + with backslashes (e.g. ones that end with "\ ") have been + corrected. + + * Recent updates to "git repack" started to duplicate objects that + are in packfiles marked with .keep flag into the new packfile by + mistake. + + * "git clone -b brefs/tags/bar" would have mistakenly thought we were + following a single tag, even though it was a name of the branch, + because it incorrectly used strstr(). + + * "%G" (nothing after G) is an invalid pretty format specifier, but + the parser did not notice it as garbage. + + * Code to avoid adding the same alternate object store twice was + subtly broken for a long time, but nobody seems to have noticed. + + * A handful of code paths had to read the commit object more than + once when showing header fields that are usually not parsed. The + internal data structure to keep track of the contents of the commit + object has been updated to reduce the need for this double-reading, + and to allow the caller find the length of the object. + + * During "git rebase --merge", a conflicted patch could not be + skipped with "--skip" if the next one also conflicted. diff --git a/Documentation/RelNotes/2.0.3.txt b/Documentation/RelNotes/2.0.3.txt new file mode 100644 index 0000000..4047b46 --- /dev/null +++ b/Documentation/RelNotes/2.0.3.txt @@ -0,0 +1,17 @@ +Git v2.0.3 Release Notes +======================== + + * An ancient rewrite passed a wrong pointer to a curl library + function in a rarely used code path. + + * "filter-branch" left an empty single-parent commit that results when + all parents of a merge commit gets mapped to the same commit, even + under "--prune-empty". + + * "log --show-signature" incorrectly decided the color to paint a + mergetag that was and was not correctly validated. + + * "log --show-signature" did not pay attention to "--graph" option. + +Also a lot of fixes to the tests and some updates to the docs are +included. diff --git a/Documentation/RelNotes/2.0.4.txt b/Documentation/RelNotes/2.0.4.txt new file mode 100644 index 0000000..7e34092 --- /dev/null +++ b/Documentation/RelNotes/2.0.4.txt @@ -0,0 +1,5 @@ +Git v2.0.4 Release Notes +======================== + + * An earlier update to v2.0.2 broken output from "git diff-tree", + which is fixed in this release. diff --git a/Documentation/RelNotes/2.0.5.txt b/Documentation/RelNotes/2.0.5.txt new file mode 100644 index 0000000..3a16f69 --- /dev/null +++ b/Documentation/RelNotes/2.0.5.txt @@ -0,0 +1,34 @@ +Git v2.0.5 Release Notes +======================== + +Fixes since v2.0.4 +------------------ + + * We used to allow committing a path ".Git/config" with Git that is + running on a case sensitive filesystem, but an attempt to check out + such a path with Git that runs on a case insensitive filesystem + would have clobbered ".git/config", which is definitely not what + the user would have expected. Git now prevents you from tracking + a path with ".Git" (in any case combination) as a path component. + + * On Windows, certain path components that are different from ".git" + are mapped to ".git", e.g. "git~1/config" is treated as if it were + ".git/config". HFS+ has a similar issue, where certain unicode + codepoints are ignored, e.g. ".g\u200cit/config" is treated as if + it were ".git/config". Pathnames with these potential issues are + rejected on the affected systems. Git on systems that are not + affected by this issue (e.g. Linux) can also be configured to + reject them to ensure cross platform interoperability of the hosted + projects. + + * "git fsck" notices a tree object that records such a path that can + be confused with ".git", and with receive.fsckObjects configuration + set to true, an attempt to "git push" such a tree object will be + rejected. Such a path may not be a problem on a well behaving + filesystem but in order to protect those on HFS+ and on case + insensitive filesystems, this check is enabled on all platforms. + +A big "thanks!" for bringing this issue to us goes to our friends in +the Mercurial land, namely, Matt Mackall and Augie Fackler. + +Also contains typofixes, documentation updates and trivial code clean-ups. diff --git a/Documentation/RelNotes/2.1.0.txt b/Documentation/RelNotes/2.1.0.txt new file mode 100644 index 0000000..ae47537 --- /dev/null +++ b/Documentation/RelNotes/2.1.0.txt @@ -0,0 +1,391 @@ +Git v2.1 Release Notes +====================== + +Backward compatibility notes +---------------------------- + + * The default value we give to the environment variable LESS has been + changed from "FRSX" to "FRX", losing "S" (chop long lines instead + of wrapping). Existing users who prefer not to see line-wrapped + output may want to set + + $ git config core.pager "less -S" + + to restore the traditional behaviour. It is expected that people + find output from most subcommands easier to read with the new + default, except for "blame" which tends to produce really long + lines. To override the new default only for "git blame", you can + do this: + + $ git config pager.blame "less -S" + + * A few disused directories in contrib/ have been retired. + + +Updates since v2.0 +------------------ + +UI, Workflows & Features + + * Since the very beginning of Git, we gave the LESS environment a + default value "FRSX" when we spawn "less" as the pager. "S" (chop + long lines instead of wrapping) has been removed from this default + set of options, because it is more or less a personal taste thing, + as opposed to the others that have good justifications (i.e. "R" is + very much justified because many kinds of output we produce are + colored and "FX" is justified because output we produce is often + shorter than a page). + + * The logic and data used to compute the display width needed for + UTF-8 strings have been updated to match Unicode 7.0 better. + + * HTTP-based transports learned to better propagate the error messages from + the webserver to the client coming over the HTTP transport. + + * The completion script for bash (in contrib/) has been updated to + better handle aliases that define a complex sequence of commands. + + * The "core.preloadindex" configuration variable is enabled by default, + allowing modern platforms to take advantage of their + multiple cores. + + * "git clone" applies the "if cloning from a local disk, physically + copy the repository using hardlinks, unless otherwise told not to with + --no-local" optimization when the url.*.insteadOf mechanism rewrites a + remote-repository "git clone $URL" into a + clone from a local disk. + + * "git commit --date=<date>" option learned more + timestamp formats, including "--date=now". + + * The `core.commentChar` configuration variable is used to specify a + custom comment character (other than the default "#") for + the commit message editor. This can be set to `auto` to attempt to + choose a different character that does not conflict with any that + already starts a line in the message being edited, for cases like + "git commit --amend". + + * "git format-patch" learned --signature-file=<file> to add the contents + of a file as a signature to the mail message it produces. + + * "git grep" learned the grep.fullname configuration variable to force + "--full-name" to be the default. This may cause regressions for + scripted users who do not expect this new behaviour. + + * "git imap-send" learned to ask the credential helper for auth + material. + + * "git log" and friends now understand the value "auto" for the + "log.decorate" configuration variable to enable the "--decorate" + option automatically when the output is sent to tty. + + * "git merge" without an argument, even when there is an upstream + defined for the current branch, refused to run until + merge.defaultToUpstream is set to true. Flip the default of that + configuration variable to true. + + * "git mergetool" learned to drive the vimdiff3 backend. + + * mergetool.prompt used to default to 'true', always asking "do you + really want to run the tool on this path?". The default has been + changed to 'false'. However, the prompt will still appear if + mergetool used its autodetection system to guess which tool to use. + Users who explicitly specify or configure a tool will no longer see + the prompt by default. + + Strictly speaking, this is a backward incompatible change and + users need to explicitly set the variable to 'true' if they want + to be prompted to confirm running the tool on each path. + + * "git replace" learned the "--edit" subcommand to create a + replacement by editing an existing object. + + * "git replace" learned a "--graft" option to rewrite the parents of a + commit. + + * "git send-email" learned "--to-cover" and "--cc-cover" options, to + tell it to copy To: and Cc: headers found in the first input file + when emitting later input files. + + * "git svn" learned to cope with malformed timestamps with only one + digit in the hour part, e.g. 2014-01-07T5:01:02.048176Z, emitted + by some broken subversion server implementations. + + * "git tag" when editing the tag message shows the name of the tag + being edited as a comment in the editor. + + * "git tag" learned to pay attention to "tag.sort" configuration, to + be used as the default sort order when no --sort=<value> option + is given. + + * A new "git verify-commit" command, to check GPG signatures in signed + commits, in a way similar to "git verify-tag" is used to check + signed tags, was added. + + +Performance, Internal Implementation, etc. + + * Build procedure for 'subtree' (in contrib/) has been cleaned up. + + * Support for the profile-feedback build, which has + bit-rotted for quite a while, has been updated. + + * An experimental format to use two files (the base file and + incremental changes relative to it) to represent the index has been + introduced; this may reduce I/O cost of rewriting a large index + when only small part of the working tree changes. + + * Effort to shrink the size of patches Windows folks maintain on top + by upstreaming them continues. More tests that are not applicable + to the Windows environment are identified and either skipped or + made more portable. + + * Eradication of "test $condition -a $condition" from our scripts + continues. + + * The `core.deltabasecachelimit` used to default to 16 MiB , but this + proved to be too small, and has been bumped to 96 MiB. + + * "git blame" has been optimized greatly by reorganising the data + structure that is used to keep track of the work to be done. + + * "git diff" that compares 3-or-more trees (e.g. parents and the + result of a merge) has been optimized. + + * The API to update/delete references are being converted to handle + updates to multiple references in a transactional way. As an + example, "update-ref --stdin [-z]" has been updated to use this + API. + + * skip_prefix() and strip_suffix() API functions are used a lot more + widely throughout the codebase now. + + * Parts of the test scripts can be skipped by using a range notation, + e.g. "sh t1234-test.sh --run='1-4 6 8-'" to omit test piece 5 and 7 + and run everything else. + + +Also contains various documentation updates and code clean-ups. + + +Fixes since v2.0 +---------------- + +Unless otherwise noted, all the fixes since v2.0 in the maintenance +track are contained in this release (see the maintenance releases' +notes for details). + + * We used to unconditionally disable the pager in the pager process + we spawn to feed out output, but that prevented people who want to + run "less" within "less" from doing so. + (merge c0459ca je/pager-do-not-recurse later to maint). + + * Tools that read diagnostic output in our standard error stream do + not want to see terminal control sequence (e.g. erase-to-eol). + Detect them by checking if the standard error stream is connected + to a tty. + (merge 38de156 mn/sideband-no-ansi later to maint). + + * Mishandling of patterns in .gitignore that have trailing SPs quoted + with backslashes (e.g. ones that end with "\ ") has been + corrected. + (merge 97c1364be6b pb/trim-trailing-spaces later to maint). + + * Reworded the error message given upon a failure to open an existing + loose object file due to e.g. permission issues; it was reported as + the object being corrupt, but that is not quite true. + (merge d6c8a05 jk/report-fail-to-read-objects-better later to maint). + + * "git log -2master" is a common typo that shows two commits starting + from whichever random branch that is not 'master' that happens to + be checked out currently. + (merge e3fa568 jc/revision-dash-count-parsing later to maint). + + * Code to avoid adding the same alternate object store twice was + subtly broken for a long time, but nobody seems to have noticed. + (merge 80b4785 rs/fix-alt-odb-path-comparison later to maint). + (merge 539e750 ek/alt-odb-entry-fix later to maint). + + * The "%<(10,trunc)%s" pretty format specifier in the log family of + commands is used to truncate the string to a given length (e.g. 10 + in the example) with padding to column-align the output, but did + not take into account that number of bytes and number of display + columns are different. + (merge 7d50987 as/pretty-truncate later to maint). + + * "%G" (nothing after G) is an invalid pretty format specifier, but + the parser did not notice it as garbage. + (merge 958b2eb jk/pretty-G-format-fixes later to maint). + + * A handful of code paths had to read the commit object more than + once when showing header fields that are usually not parsed. The + internal data structure to keep track of the contents of the commit + object has been updated to reduce the need for this double-reading, + and to allow the caller find the length of the object. + (merge 218aa3a jk/commit-buffer-length later to maint). + + * The "mailmap.file" configuration option did not support tilde + expansion (i.e. ~user/path and ~/path). + (merge 9352fd5 ow/config-mailmap-pathname later to maint). + + * The completion scripts (in contrib/) did not know about quite a few + options that are common between "git merge" and "git pull", and a + couple of options unique to "git merge". + (merge 8fee872 jk/complete-merge-pull later to maint). + + * The unix-domain socket used by the sample credential cache daemon + tried to unlink an existing stale one at a wrong path, if the path + to the socket was given as an overlong path that does not fit in + the sun_path member of the sockaddr_un structure. + (merge 2869b3e rs/fix-unlink-unix-socket later to maint). + + * An ancient rewrite passed a wrong pointer to a curl library + function in a rarely used code path. + (merge 479eaa8 ah/fix-http-push later to maint). + + * "--ignore-space-change" option of "git apply" ignored the spaces + at the beginning of lines too aggressively, which is inconsistent + with the option of the same name that "diff" and "git diff" have. + (merge 14d3bb4 jc/apply-ignore-whitespace later to maint). + + * "git blame" miscounted the number of columns needed to show localized + timestamps, resulting in a jaggy left-side-edge for the source code + lines in its output. + (merge dd75553 jx/blame-align-relative-time later to maint). + + * "git blame" assigned the blame to the copy in the working-tree if + the repository is set to core.autocrlf=input and the file used CRLF + line endings. + (merge 4d4813a bc/blame-crlf-test later to maint). + + * "git clone -b brefs/tags/bar" would have mistakenly thought we were + following a single tag, even though it was a name of the branch, + because it incorrectly used strstr(). + (merge 60a5f5f jc/fix-clone-single-starting-at-a-tag later to maint). + + * "git commit --allow-empty-message -C $commit" did not work when the + commit did not have any log message. + (merge 076cbd6 jk/commit-C-pick-empty later to maint). + + * "git diff --find-copies-harder" sometimes pretended as if the mode + bits have changed for paths that are marked with the assume-unchanged + bit. + (merge 5304810 jk/diff-files-assume-unchanged later to maint). + + * "filter-branch" left an empty single-parent commit that results when + all parents of a merge commit get mapped to the same commit, even + under "--prune-empty". + (merge 79bc4ef cb/filter-branch-prune-empty-degenerate-merges later to maint). + + * "git format-patch" did not enforce the rule that the "--follow" + option from the log/diff family of commands must be used with + exactly one pathspec. + (merge dd63f16 jk/diff-follow-must-take-one-pathspec later to maint). + + * "git gc --auto" was recently changed to run in the background to + give control back early to the end-user sitting in front of the + terminal, but it forgot that housekeeping involving reflogs should + be done without other processes competing for accesses to the refs. + (merge 62aad18 nd/daemonize-gc later to maint). + + * "git grep -O" to show the lines that hit in the pager did not work + well with case insensitive search. We now spawn "less" with its + "-I" option when it is used as the pager (which is the default). + (merge f7febbe sk/spawn-less-case-insensitively-from-grep-O-i later to maint). + + * We used to disable threaded "git index-pack" on platforms without + thread-safe pread(); use a different workaround for such + platforms to allow threaded "git index-pack". + (merge 3953949 nd/index-pack-one-fd-per-thread later to maint). + + * The error reporting from "git index-pack" has been improved to + distinguish missing objects from type errors. + (merge 77583e7 jk/index-pack-report-missing later to maint). + + * "log --show-signature" incorrectly decided the color to paint a + mergetag that was and was not correctly validated. + (merge 42c55ce mg/fix-log-mergetag-color later to maint). + + * "log --show-signature" did not pay attention to the "--graph" option. + (merge cf3983d zk/log-graph-showsig later to maint). + + * "git mailinfo" used to read beyond the ends of header strings while + parsing an incoming e-mail message to extract the patch. + (merge b1a013d rs/mailinfo-header-cmp later to maint). + + * On a case insensitive filesystem, merge-recursive incorrectly + deleted the file that is to be renamed to a name that is the same + except for case differences. + (merge baa37bf dt/merge-recursive-case-insensitive later to maint). + + * Merging changes into a file that ends in an incomplete line made the + last line into a complete one, even when the other branch did not + change anything around the end of file. + (merge ba31180 mk/merge-incomplete-files later to maint). + + * "git pack-objects" unnecessarily copied the previous contents when + extending the hashtable, even though it will populate the table + from scratch anyway. + (merge fb79947 rs/pack-objects-no-unnecessary-realloc later to maint). + + * Recent updates to "git repack" started to duplicate objects that + are in packfiles marked with the .keep flag into the new packfile by + mistake. + (merge d078d85 jk/repack-pack-keep-objects later to maint). + + * "git rerere forget" did not work well when merge.conflictstyle + was set to a non-default value. + (merge de3d8bb fc/rerere-conflict-style later to maint). + + * "git remote rm" and "git remote prune" can involve removing many + refs at once, which is not a very efficient thing to do when very + many refs exist in the packed-refs file. + (merge e6bea66 jl/remote-rm-prune later to maint). + + * "git log --exclude=<glob> --all | git shortlog" worked as expected, + but "git shortlog --exclude=<glob> --all", which is supposed to be + identical to the above pipeline, was not accepted at the command + line argument parser level. + (merge eb07774 jc/shortlog-ref-exclude later to maint). + + * The autostash mode of "git rebase -i" did not restore the dirty + working tree state if the user aborted the interactive rebase by + emptying the insn sheet. + (merge ddb5432 rr/rebase-autostash-fix later to maint). + + * "git rebase --fork-point" did not filter out patch-identical + commits correctly. + + * During "git rebase --merge", a conflicted patch could not be + skipped with "--skip" if the next one also conflicted. + (merge 95104c7 bc/fix-rebase-merge-skip later to maint). + + * "git show -s" (i.e. show log message only) used to incorrectly emit + an extra blank line after a merge commit. + (merge ad2f725 mk/show-s-no-extra-blank-line-for-merges later to maint). + + * "git status", even though it is a read-only operation, tries to + update the index with refreshed lstat(2) info to optimize future + accesses to the working tree opportunistically, but this could + race with a "read-write" operation that modifies the index while it + is running. Detect such a race and avoid overwriting the index. + (merge 426ddee ym/fix-opportunistic-index-update-race later to maint). + + * "git status" (and "git commit") behaved as if changes in a modified + submodule are not there if submodule.*.ignore configuration is set, + which was misleading. The configuration is only to unclutter diff + output during the course of development, and not to hide + changes in the "status" output to cause the users forget to commit + them. + (merge c215d3d jl/status-added-submodule-is-never-ignored later to maint). + + * Documentation for "git submodule sync" forgot to say that the subcommand + can take the "--recursive" option. + (merge 9393ae7 mc/doc-submodule-sync-recurse later to maint). + + * "git update-index --cacheinfo" in 2.0 release crashed on a + malformed command line. + (merge c8e1ee4 jc/rev-parse-argh-dashed-multi-words later to maint). + + * The mode to run tests with HTTP server tests disabled was broken. + (merge afa53fe na/no-http-test-in-the-middle later to maint). diff --git a/Documentation/RelNotes/2.1.1.txt b/Documentation/RelNotes/2.1.1.txt new file mode 100644 index 0000000..830fc3c --- /dev/null +++ b/Documentation/RelNotes/2.1.1.txt @@ -0,0 +1,44 @@ +Git v2.1.1 Release Notes +======================== + + * Git 2.0 had a regression where "git fetch" into a shallowly + cloned repository from a repository with bitmap object index + enabled did not work correctly. This has been corrected. + + * Git 2.0 had a regression which broke (rarely used) "git diff-tree + -t". This has been corrected. + + * "git log --pretty/format=" with an empty format string did not + mean the more obvious "No output whatsoever" but "Use default + format", which was counterintuitive. Now it means "nothing shown + for the log message part". + + * "git -c section.var command" and "git -c section.var= command" + should pass the configuration differently (the former should be a + boolean true, the latter should be an empty string), but they + didn't work that way. Now it does. + + * Applying a patch not generated by Git in a subdirectory used to + check the whitespace breakage using the attributes for incorrect + paths. Also whitespace checks were performed even for paths + excluded via "git apply --exclude=<path>" mechanism. + + * "git bundle create" with date-range specification were meant to + exclude tags outside the range, but it did not work correctly. + + * "git add x" where x that used to be a directory has become a + symbolic link to a directory misbehaved. + + * The prompt script checked $GIT_DIR/ref/stash file to see if there + is a stash, which was a no-no. + + * "git checkout -m" did not switch to another branch while carrying + the local changes forward when a path was deleted from the index. + + * With sufficiently long refnames, fast-import could have overflown + an on-stack buffer. + + * After "pack-refs --prune" packed refs at the top-level, it failed + to prune them. + + * "git gc --auto" triggered from "git fetch --quiet" was not quiet. diff --git a/Documentation/RelNotes/2.1.2.txt b/Documentation/RelNotes/2.1.2.txt new file mode 100644 index 0000000..abc3b89 --- /dev/null +++ b/Documentation/RelNotes/2.1.2.txt @@ -0,0 +1,20 @@ +Git v2.1.2 Release Notes +======================== + + * "git push" over HTTP transport had an artificial limit on number of + refs that can be pushed imposed by the command line length. + + * When receiving an invalid pack stream that records the same object + twice, multiple threads got confused due to a race. + + * An attempt to remove the entire tree in the "git fast-import" input + stream caused it to misbehave. + + * Reachability check (used in "git prune" and friends) did not add a + detached HEAD as a starting point to traverse objects still in use. + + * "git config --add section.var val" used to lose existing + section.var whose value was an empty string. + + * "git fsck" failed to report that it found corrupt objects via its + exit status in some cases. diff --git a/Documentation/RelNotes/2.1.3.txt b/Documentation/RelNotes/2.1.3.txt new file mode 100644 index 0000000..acc9ebb --- /dev/null +++ b/Documentation/RelNotes/2.1.3.txt @@ -0,0 +1,26 @@ +Git v2.1.3 Release Notes +======================== + + * Some MUAs mangled a line in a message that begins with "From " to + ">From " when writing to a mailbox file and feeding such an input to + "git am" used to lose such a line. + + * "git daemon" (with NO_IPV6 build configuration) used to incorrectly + use the hostname even when gethostbyname() reported that the given + hostname is not found. + + * Newer versions of 'meld' breaks the auto-detection we use to see if + they are new enough to support the `--output` option. + + * "git pack-objects" forgot to disable the codepath to generate + object recheability bitmap when it needs to split the resulting + pack. + + * "gitweb" used deprecated CGI::startfrom, which was removed from + CGI.pm as of 4.04; use CGI::start_from instead. + + * "git log" documentation had an example section marked up not + quite correctly, which passed AsciiDoc but failed with + AsciiDoctor. + +Also contains some documentation updates. diff --git a/Documentation/RelNotes/2.1.4.txt b/Documentation/RelNotes/2.1.4.txt new file mode 100644 index 0000000..d16e5f0 --- /dev/null +++ b/Documentation/RelNotes/2.1.4.txt @@ -0,0 +1,34 @@ +Git v2.1.4 Release Notes +======================== + +Fixes since v2.1.3 +------------------ + + * We used to allow committing a path ".Git/config" with Git that is + running on a case sensitive filesystem, but an attempt to check out + such a path with Git that runs on a case insensitive filesystem + would have clobbered ".git/config", which is definitely not what + the user would have expected. Git now prevents you from tracking + a path with ".Git" (in any case combination) as a path component. + + * On Windows, certain path components that are different from ".git" + are mapped to ".git", e.g. "git~1/config" is treated as if it were + ".git/config". HFS+ has a similar issue, where certain unicode + codepoints are ignored, e.g. ".g\u200cit/config" is treated as if + it were ".git/config". Pathnames with these potential issues are + rejected on the affected systems. Git on systems that are not + affected by this issue (e.g. Linux) can also be configured to + reject them to ensure cross platform interoperability of the hosted + projects. + + * "git fsck" notices a tree object that records such a path that can + be confused with ".git", and with receive.fsckObjects configuration + set to true, an attempt to "git push" such a tree object will be + rejected. Such a path may not be a problem on a well behaving + filesystem but in order to protect those on HFS+ and on case + insensitive filesystems, this check is enabled on all platforms. + +A big "thanks!" for bringing this issue to us goes to our friends in +the Mercurial land, namely, Matt Mackall and Augie Fackler. + +Also contains typofixes, documentation updates and trivial code clean-ups. diff --git a/Documentation/RelNotes/2.2.0.txt b/Documentation/RelNotes/2.2.0.txt new file mode 100644 index 0000000..e98ecbc --- /dev/null +++ b/Documentation/RelNotes/2.2.0.txt @@ -0,0 +1,313 @@ +Git v2.2 Release Notes +====================== + +Updates since v2.1 +------------------ + +Ports + + * Building on older MacOS X systems automatically sets + the necessary NO_APPLE_COMMON_CRYPTO build-time option. + + * Building with NO_PTHREADS has been resurrected. + + * Compilation options have been updated a bit to better support the + z/OS port. + + +UI, Workflows & Features + + * "git archive" learned to filter what gets archived with a pathspec. + + * "git config --edit --global" starts from a skeletal per-user + configuration file contents, instead of a total blank, when the + user does not already have any global config. This immediately + reduces the need to later ask "Have you forgotten to set + core.user?", and we can add more to the template as we gain + more experience. + + * "git stash list -p" used to be almost always a no-op because each + stash entry is represented as a merge commit. It learned to show + the difference between the base commit version and the working tree + version, which is in line with what "git stash show" gives. + + * Sometimes users want to report a bug they experience on their + repository, but they are not at liberty to share the contents of + the repository. "fast-export" was taught an "--anonymize" option + to replace blob contents, names of people, paths and log + messages with bland and simple strings to help them. + + * "git difftool" learned an option to stop feeding paths to the + diff backend when it exits with a non-zero status. + + * "git grep" learned to paint (or not paint) partial matches on + context lines when showing "grep -C<num>" output in color. + + * "log --date=iso" uses a slight variant of the ISO 8601 format that is + more human readable. A new "--date=iso-strict" option gives + datetime output that conforms more strictly. + + * The logic "git prune" uses is more resilient against various corner + cases. + + * A broken reimplementation of Git could write an invalid index that + records both stage #0 and higher-stage entries for the same path. + We now notice and reject such an index, as there is no sensible + fallback (we do not know if the broken tool wanted to resolve and + forgot to remove the higher-stage entries, or if it wanted to unresolve + and forgot to remove the stage #0 entry). + + * The temporary files "git mergetool" uses are renamed to avoid too + many dots in them (e.g. a temporary file for "hello.c" used to be + named e.g. "hello.BASE.4321.c" but now uses underscore instead, + e.g. "hello_BASE_4321.c", to allow us to have multiple variants). + + * The temporary files "git mergetool" uses can be placed in a newly + created temporary directory, instead of the current directory, by + setting the mergetool.writeToTemp configuration variable. + + * "git mergetool" understands "--tool bc" now, as version 4 of + BeyondCompare can be driven the same way as its version 3 and it + feels awkward to say "--tool bc3" to run version 4. + + * The "pre-receive" and "post-receive" hooks are no longer required + to consume their input fully (not following this requirement used + to result in intermittent errors in "git push"). + + * The pretty-format specifier "%d", which expands to " (tagname)" + for a tagged commit, gained a cousin "%D" that just gives the + "tagname" without frills. + + * "git push" learned "--signed" push, that allows a push (i.e. + request to update the refs on the other side to point at a new + history, together with the transmission of necessary objects) to be + signed, so that it can be verified and audited, using the GPG + signature of the person who pushed, that the tips of branches at a + public repository really point the commits the pusher wanted to, + without having to "trust" the server. + + * "git interpret-trailers" is a new filter to programmatically edit + the tail end of the commit log messages, e.g. "Signed-off-by:". + + * "git help everyday" shows the "Everyday Git in 20 commands or so" + document, whose contents have been updated to match more modern + Git practice. + + * On the "git svn" front, work progresses to reduce memory consumption and + to improve handling of mergeinfo. + + +Performance, Internal Implementation, Development Support etc. + + * The API to manipulate the "refs" has been restructured to make it + more transactional, with the eventual goal to allow all-or-none + atomic updates and migrating the storage to something other than + the traditional filesystem based one (e.g. databases). + + * The lockfile API and its users have been cleaned up. + + * We no longer attempt to keep track of individual dependencies to + the header files in the build procedure, relying instead on automated + dependency generation support from modern compilers. + + * In tests, we have been using NOT_{MINGW,CYGWIN} test prerequisites + long before negated prerequisites e.g. !MINGW were invented. + The former has been converted to the latter to avoid confusion. + + * Optimized looking up a remote's configuration in a repository with very many + remotes defined. + + * There are cases where you lock and open to write a file, close it + to show the updated contents to an external processes, and then have + to update the file again while still holding the lock; now the + lockfile API has support for such an access pattern. + + * The API to allocate the structure to keep track of commit + decoration has been updated to make it less cumbersome to use. + + * An in-core caching layer to let us avoid reading the same + configuration files several times has been added. A few commands + have been converted to use this subsystem. + + * Various code paths have been cleaned up and simplified by using + the "strbuf", "starts_with()", and "skip_prefix()" APIs more. + + * A few codepaths that died when large blobs that would not fit in + core are involved in their operation have been taught to punt + instead, by e.g. marking a too-large blob as not to be diffed. + + * A few more code paths in "commit" and "checkout" have been taught + to repopulate the cache-tree in the index, to help speed up later + "write-tree" (used in "commit") and "diff-index --cached" (used in + "status"). + + * A common programming mistake to assign the same short option name + to two separate options is detected by the parse_options() API to help + developers. + + * The code path to write out the packed-refs file has been optimized, + which especially matters in a repository with a large number of + refs. + + * The check to see if a ref $F can be created by making sure no + existing ref has $F/ as its prefix has been optimized, which + especially matters in a repository with a large number of existing + refs. + + * "git fsck" was taught to check the contents of tag objects a bit more. + + * "git hash-object" was taught a "--literally" option to help + debugging. + + * When running a required clean filter, we do not have to mmap the + original before feeding the filter. Instead, stream the file + contents directly to the filter and process its output. + + * The scripts in the test suite can be run with the "-x" option to show + a shell-trace of each command they run. + + * The "run-command" API learned to manage the argv and environment + arrays for child process, alleviating the need for the callers to + allocate and deallocate them. + + * Some people use AsciiDoctor, instead of AsciiDoc, to format our + documentation set; the documentation has been adjusted to be usable + by both, as AsciiDoctor is pickier than AsciiDoc about its input + mark-up. + + +Also contains various documentation updates and code clean-ups. + + +Fixes since v2.1 +---------------- + +Unless otherwise noted, all the fixes since v2.1 in the maintenance +track are contained in this release (see the maintenance releases' +notes for details). + + * "git log --pretty/format=" with an empty format string did not + mean the more obvious "No output whatsoever" but "Use default + format", which was counterintuitive. + + * "git -c section.var command" and "git -c section.var= command" + should pass the configuration value differently (the former should be a + boolean true, the latter should be an empty string). + + * Applying a patch not generated by Git in a subdirectory used to + check for whitespace breakage using the attributes of incorrect + paths. Also whitespace checks were performed even for paths + excluded via the "git apply --exclude=<path>" mechanism. + + * "git bundle create" with a date-range specification was meant to + exclude tags outside the range, but it didn't. + + * "git add x" where x used to be a directory and is now a + symbolic link to a directory misbehaved. + + * The prompt script checked the $GIT_DIR/ref/stash file to see if there + is a stash, which was a no-no. + + * Pack-protocol documentation had a minor typo. + + * "git checkout -m" did not switch to another branch while carrying + the local changes forward when a path was deleted from the index. + + * "git daemon" (with NO_IPV6 build configuration) used to incorrectly + use the hostname even when gethostbyname() reported that the given + hostname is not found. + (merge 107efbe rs/daemon-fixes later to maint). + + * With sufficiently long refnames, "git fast-import" could have + overflowed an on-stack buffer. + + * After "pack-refs --prune" packed refs at the top-level, it failed + to prune them. + + * Progress output from "git gc --auto" was visible in "git fetch -q". + + * We used to pass -1000 to poll(2), expecting it to also mean "no + timeout", which should be spelled as -1. + + * "git rebase" documentation was unclear that it is required to + specify on what <upstream> the rebase is to be done when telling it + to first check out <branch>. + (merge 95c6826 so/rebase-doc later to maint). + + * "git push" over HTTP transport had an artificial limit on the number of + refs that can be pushed, imposed by the command line length. + (merge 26be19b jk/send-pack-many-refspecs later to maint). + + * When receiving an invalid pack stream that records the same object + twice, multiple threads got confused due to a race. + (merge ab791dd jk/index-pack-threading-races later to maint). + + * An attempt to remove the entire tree in the "git fast-import" input + stream caused it to misbehave. + (merge 2668d69 mb/fast-import-delete-root later to maint). + + * Reachability check (used in "git prune" and friends) did not add a + detached HEAD as a starting point to traverse objects still in use. + (merge c40fdd0 mk/reachable-protect-detached-head later to maint). + + * "git config --add section.var val" when section.var already has an + empty-string value used to lose the empty-string value. + (merge c1063be ta/config-add-to-empty-or-true-fix later to maint). + + * "git fsck" failed to report that it found corrupt objects via its + exit status in some cases. + (merge 30d1038 jk/fsck-exit-code-fix later to maint). + + * Use of the "--verbose" option used to break "git branch --merged". + (merge 12994dd jk/maint-branch-verbose-merged later to maint). + + * Some MUAs mangle a line in a message that begins with "From " to + ">From " when writing to a mailbox file, and feeding such an input + to "git am" used to lose such a line. + (merge 85de86a jk/mbox-from-line later to maint). + + * "rev-parse --verify --quiet $name" is meant to quietly exit with a + non-zero status when $name is not a valid object name, but still + gave error messages in some cases. + + * A handful of C source files have been updated to include + "git-compat-util.h" as the first thing, to conform better to our + coding guidelines. + (merge 1c4b660 da/include-compat-util-first-in-c later to maint). + + * The t7004 test, which tried to run Git with small stack space, has been + updated to use a bit larger stack to avoid false breakage on some + platforms. + (merge b9a1907 sk/tag-contains-wo-recursion later to maint). + + * A few documentation pages had example sections marked up not quite + correctly, which passed AsciiDoc but failed with AsciiDoctor. + (merge c30c43c bc/asciidoc-pretty-formats-fix later to maint). + (merge f8a48af bc/asciidoc later to maint). + + * "gitweb" used deprecated CGI::startfrom, which was removed from + CGI.pm as of 4.04; use CGI::start_from instead. + (merge 4750f4b rm/gitweb-start-form later to maint). + + * Newer versions of 'meld' break the auto-detection we use to see if + they are new enough to support the `--output` option. + (merge b12d045 da/mergetool-meld later to maint). + + * "git pack-objects" forgot to disable the codepath to generate the + object reachability bitmap when it needs to split the resulting + pack. + (merge 2113471 jk/pack-objects-no-bitmap-when-splitting later to maint). + + * The code to use cache-tree trusted the on-disk data too much and + fell into an infinite loop upon seeing an incorrectly recorded + index file. + (merge 729dbbd jk/cache-tree-protect-from-broken-libgit2 later to maint). + + * "git fetch" into a repository where branch B was deleted earlier, + back when it had reflog enabled, and then branch B/C is fetched + into it without reflog enabled, which is arguably an unlikely + corner case, unnecessarily failed. + (merge aae828b jk/fetch-reflog-df-conflict later to maint). + + * "git log --first-parent -L..." used to crash. + (merge a8787c5 tm/line-log-first-parent later to maint). diff --git a/Documentation/RelNotes/2.2.1.txt b/Documentation/RelNotes/2.2.1.txt new file mode 100644 index 0000000..d5a3cd9 --- /dev/null +++ b/Documentation/RelNotes/2.2.1.txt @@ -0,0 +1,34 @@ +Git v2.2.1 Release Notes +======================== + +Fixes since v2.2 +---------------- + + * We used to allow committing a path ".Git/config" with Git that is + running on a case sensitive filesystem, but an attempt to check out + such a path with Git that runs on a case insensitive filesystem + would have clobbered ".git/config", which is definitely not what + the user would have expected. Git now prevents you from tracking + a path with ".Git" (in any case combination) as a path component. + + * On Windows, certain path components that are different from ".git" + are mapped to ".git", e.g. "git~1/config" is treated as if it were + ".git/config". HFS+ has a similar issue, where certain unicode + codepoints are ignored, e.g. ".g\u200cit/config" is treated as if + it were ".git/config". Pathnames with these potential issues are + rejected on the affected systems. Git on systems that are not + affected by this issue (e.g. Linux) can also be configured to + reject them to ensure cross platform interoperability of the hosted + projects. + + * "git fsck" notices a tree object that records such a path that can + be confused with ".git", and with receive.fsckObjects configuration + set to true, an attempt to "git push" such a tree object will be + rejected. Such a path may not be a problem on a well behaving + filesystem but in order to protect those on HFS+ and on case + insensitive filesystems, this check is enabled on all platforms. + +A big "thanks!" for bringing this issue to us goes to our friends in +the Mercurial land, namely, Matt Mackall and Augie Fackler. + +Also contains typofixes, documentation updates and trivial code clean-ups. diff --git a/Documentation/RelNotes/2.2.2.txt b/Documentation/RelNotes/2.2.2.txt new file mode 100644 index 0000000..b19a35d --- /dev/null +++ b/Documentation/RelNotes/2.2.2.txt @@ -0,0 +1,63 @@ +Git v2.2.2 Release Notes +======================== + +Fixes since v2.2.1 +------------------ + + * "git checkout $treeish $path", when $path in the index and the + working tree already matched what is in $treeish at the $path, + still overwrote the $path unnecessarily. + + * "git config --get-color" did not parse its command line arguments + carefully. + + * open() emulated on Windows platforms did not give EISDIR upon + an attempt to open a directory for writing. + + * A few code paths used abs() when they should have used labs() on + long integers. + + * "gitweb" used to depend on a behaviour recent CGI.pm deprecated. + + * "git init" (hence "git clone") initialized the per-repository + configuration file .git/config with x-bit by mistake. + + * Git 2.0 was supposed to make the "simple" mode for the default of + "git push", but it didn't. + + * "Everyday" document had a broken link. + + * The build procedure did not bother fixing perl and python scripts + when NO_PERL and NO_PYTHON build-time configuration changed. + + * The code that reads the reflog from the newer to the older entries + did not handle an entry that crosses a boundary of block it uses to + read them correctly. + + * "git apply" was described in the documentation to take --ignore-date + option, which it does not. + + * Traditionally we tried to avoid interpreting date strings given by + the user as future dates, e.g. GIT_COMMITTER_DATE=2014-12-10 when + used early November 2014 was taken as "October 12, 2014" because it + is likely that a date in the future, December 10, is a mistake. + This heuristics has been loosened to allow people to express future + dates (most notably, --until=<date> may want to be far in the + future) and we no longer tiebreak by future-ness of the date when + + (1) ISO-like format is used, and + (2) the string can make sense interpreted as both y-m-d and y-d-m. + + Git may still have to use the heuristics to tiebreak between dd/mm/yy + and mm/dd/yy, though. + + * The code to abbreviate an object name to its short unique prefix + has been optimized when no abbreviation was requested. + + * "git add --ignore-errors ..." did not ignore an error to + give a file that did not exist. + + * Git did not correctly read an overlong refname from a packed refs + file. + +Also contains typofixes, documentation updates and trivial code clean-ups. diff --git a/Documentation/RelNotes/2.2.3.txt b/Documentation/RelNotes/2.2.3.txt new file mode 100644 index 0000000..5bfffa4 --- /dev/null +++ b/Documentation/RelNotes/2.2.3.txt @@ -0,0 +1,9 @@ +Git v2.2.3 Release Notes +======================== + +Fixes since v2.2.2 +------------------ + + * A handful of codepaths that used to use fixed-sized arrays to hold + pathnames have been corrected to use strbuf and other mechanisms to + allow longer pathnames without fearing overflows. diff --git a/Documentation/RelNotes/2.3.0.txt b/Documentation/RelNotes/2.3.0.txt new file mode 100644 index 0000000..e3c639c --- /dev/null +++ b/Documentation/RelNotes/2.3.0.txt @@ -0,0 +1,300 @@ +Git v2.3 Release Notes +====================== + +This one ended up to be a release with lots of small corrections and +improvements without big uncomfortably exciting features. The recent +security fix that went to 2.2.1 and older maintenance tracks is also +contained in this update. + + +Updates since v2.2 +------------------ + +Ports + + * Recent gcc toolchain on Cygwin started throwing compilation warning, + which has been squelched. + + * A few updates to build on platforms that lack tv_nsec, + clock_gettime, CLOCK_MONOTONIC and HMAC_CTX_cleanup (e.g. older + RHEL) have been added. + + +UI, Workflows & Features + + * It was cumbersome to use "GIT_SSH" mechanism when the user wanted + to pass an extra set of arguments to the underlying ssh. A new + environment variable GIT_SSH_COMMAND can be used for this. + + * A request to store an empty note via "git notes" meant to remove + note from the object but with --allow-empty we will store a + (surprise!) note that is empty. + + * "git interpret-trailers" learned to properly handle the + "Conflicts:" block at the end. + + * "git am" learned "--message-id" option to copy the message ID of + the incoming e-mail to the log message of resulting commit. + + * "git clone --reference=<over there>" learned the "--dissociate" + option to go with it; it borrows objects from the reference object + store while cloning only to reduce network traffic and then + dissociates the resulting clone from the reference by performing + local copies of borrowed objects. + + * "git send-email" learned "--transfer-encoding" option to force a + non-fault Content-Transfer-Encoding header (e.g. base64). + + * "git send-email" normally identifies itself via X-Mailer: header in + the message it sends out. A new command line flag --no-xmailer + allows the user to squelch the header. + + * "git push" into a repository with a working tree normally refuses + to modify the branch that is checked out. The command learned to + optionally do an equivalent of "git reset --hard" only when there + is no change to the working tree and the index instead, which would + be useful to "deploy" by pushing into a repository. + + * "git new-workdir" (in contrib/) can be used to populate an empty + and existing directory now. + + * Credential helpers are asked in turn until one of them give + positive response, which is cumbersome to turn off when you need to + run Git in an automated setting. The credential helper interface + learned to allow a helper to say "stop, don't ask other helpers." + Also GIT_TERMINAL_PROMPT environment can be set to false to disable + our built-in prompt mechanism for passwords. + + * "git branch -d" (delete) and "git branch -m" (move) learned to + honor "-f" (force) flag; unlike many other subcommands, the way to + force these have been with separate "-D/-M" options, which was + inconsistent. + + * "diff-highlight" filter (in contrib/) allows its color output to be + customized via configuration variables. + + * "git imap-send" learned to take "-v" (verbose) and "-q" (quiet) + command line options. + + * "git remote add $name $URL" is now allowed when "url.$URL.insteadOf" + is already defined. + + * "git imap-send" now can be built to use cURL library to talk to + IMAP servers (if the library is recent enough, of course). + This allows you to use authenticate method other than CRAM-MD5, + among other things. + + * "git imap-send" now allows GIT_CURL_VERBOSE environment variable to + control the verbosity when talking via the cURL library. + + * The prompt script (in contrib/) learned to optionally hide prompt + when in an ignored directory by setting GIT_PS1_HIDE_IF_PWD_IGNORED + shell variable. + + +Performance, Internal Implementation, Development Support etc. + + * Earlier we made "rev-list --object-edge" more aggressively list the + objects at the edge commits, in order to reduce number of objects　 + fetched into a shallow repository, but the change affected cases + other than "fetching into a shallow repository" and made it + unusably slow (e.g. fetching into a normal repository should not + have to suffer the overhead from extra processing). Limit it to a + more specific case by introducing --objects-edge-aggressive, a new + option to rev-list. + + * Squelched useless compiler warnings on Mac OS X regarding the + crypto API. + + * The procedure to generate unicode table has been simplified. + + * Some filesystems assign filemodes in a strange way, fooling then + automatic "filemode trustability" check done during a new + repository creation. The initialization codepath has been hardened + against this issue. + + * The codepath in "git remote update --prune" to drop many refs has + been optimized. + + * The API into get_merge_bases*() family of functions was easy to + misuse, which has been corrected to make it harder to do so. + + * Long overdue departure from the assumption that S_IFMT is shared by + everybody made in 2005, which was necessary to port to z/OS. + + * "git push" and "git fetch" did not communicate an overlong refname + correctly. Now it uses 64kB sideband to accommodate longer ones. + + * Recent GPG changes the keyring format and drops support for RFC1991 + formatted signatures, breaking our existing tests. + + * "git-prompt" (in contrib/) used a variable from the global scope, + possibly contaminating end-user's namespace. + + +Also contains various documentation updates and code clean-ups. + + +Fixes since v2.2 +---------------- + +Unless otherwise noted, all the fixes since v2.2 in the maintenance +track are contained in this release (see the maintenance releases' +notes for details). + + * "git http-push" over WebDAV (aka dumb http-push) was broken in + v2.2.2 when parsing a symbolic ref, resulting in a bogus request + that gets rejected by recent versions of cURL library. + (merge f6786c8 jk/http-push-symref-fix later to maint). + + * The logic in "git bisect bad HEAD" etc. to avoid forcing the test + of the common ancestor of bad and good commits was broken. + (merge 07913d5 cc/bisect-rev-parsing later to maint). + + * "git checkout-index --temp=$target $path" did not work correctly + for paths outside the current subdirectory in the project. + (merge 74c4de5 es/checkout-index-temp later to maint). + + * The report from "git checkout" on a branch that builds on another + local branch by setting its branch.*.merge to branch name (not a + full refname) incorrectly said that the upstream is gone. + (merge 05e7368 jc/checkout-local-track-report later to maint). + + * With The git-prompt support (in contrib/), using the exit status of + the last command in the prompt, e.g. PS1='$(__git_ps1) $? ', did + not work well, because the helper function stomped on the exit + status. + (merge 6babe76 tf/prompt-preserve-exit-status later to maint). + + * Recent update to "git commit" broke amending an existing commit + with bogus author/committer lines without a valid e-mail address. + (merge c83a509 jk/commit-date-approxidate later to maint). + + * The lockfile API used to get confused which file to clean up when + the process moved the $cwd after creating a lockfile. + (merge fa137f6 nd/lockfile-absolute later to maint). + + * Traditionally we tried to avoid interpreting date strings given by + the user as future dates, e.g. GIT_COMMITTER_DATE=2014-12-10 when + used early November 2014 was taken as "October 12, 2014" because it + is likely that a date in the future, December 10, is a mistake. + This heuristics has been loosened to allow people to express future + dates (most notably, --until=<date> may want to be far in the + future) and we no longer tiebreak by future-ness of the date when + + (1) ISO-like format is used, and + (2) the string can make sense interpreted as both y-m-d and y-d-m. + + Git may still have to use the heuristics to tiebreak between dd/mm/yy + and mm/dd/yy, though. + (merge d372395 jk/approxidate-avoid-y-d-m-over-future-dates later to maint). + + * Git did not correctly read an overlong refname from a packed refs + file. + (merge ea41783 jk/read-packed-refs-without-path-max later to maint). + + * "git apply" was described in the documentation to take --ignore-date + option, which it does not. + (merge 0cef4e7 rw/apply-does-not-take-ignore-date later to maint). + + * "git add -i" did not notice when the interactive command input + stream went away and kept asking the same question. + (merge a8bec7a jk/add-i-read-error later to maint). + + * "git send-email" did not handle RFC 2047 encoded headers quite + right. + (merge ab47e2a rd/send-email-2047-fix later to maint). + + * New tag object format validation added in 2.2 showed garbage after + a tagname it reported in its error message. + (merge a1e920a js/fsck-tag-validation later to maint). + + * The code that reads the reflog from the newer to the older entries + did not handle an entry that crosses a boundary of block it uses to + read them correctly. + (merge 69216bf jk/for-each-reflog-ent-reverse later to maint). + + * "git diff -B -M" after making a new copy B out of an existing file + A and then editing A extensively ought to report that B was created + by copying A and A was modified, which is what "git diff -C" + reports, but it instead said A was renamed to B and A was edited + heavily in place. This was not just incoherent but also failed to + apply with "git apply". The report has been corrected to match what + "git diff -C" produces for this case. + (merge 6936b58 jc/diff-b-m later to maint). + + * In files we pre-populate for the user to edit with commented hints, + a line of hint that is indented with a tab used to show as '#' (or + any comment char), ' ' (space), and then the hint text that began + with the tab, which some editors flag as an indentation error (tab + following space). We now omit the space after the comment char in + such a case. + (merge d55aeb7 jc/strbuf-add-lines-avoid-sp-ht-sequence later to maint). + + * "git ls-tree" does not support path selection based on negative + pathspecs, but did not error out when negative pathspecs are given. + (merge f1f6224 nd/ls-tree-pathspec later to maint). + + * The function sometimes returned a non-freeable memory and some + other times returned a piece of memory that must be freed, leading + to inevitable leaks. + (merge 59362e5 jc/exec-cmd-system-path-leak-fix later to maint). + + * The code to abbreviate an object name to its short unique prefix + has been optimized when no abbreviation was requested. + (merge 61e704e mh/find-uniq-abbrev later to maint). + + * "git add --ignore-errors ..." did not ignore an error to + give a file that did not exist. + (merge 1d31e5a mg/add-ignore-errors later to maint). + + * "git checkout $treeish $path", when $path in the index and the + working tree already matched what is in $treeish at the $path, + still overwrote the $path unnecessarily. + (merge c5326bd jk/checkout-from-tree later to maint). + + * "git config --get-color" did not parse its command line arguments + carefully. + (merge cb35722 jk/colors-fix later to maint). + + * open() emulated on Windows platforms did not give EISDIR upon + an attempt to open a directory for writing. + (merge ba6fad0 js/windows-open-eisdir-error later to maint). + + * A few code paths used abs() when they should have used labs() on + long integers. + (merge 83915ba rs/maint-config-use-labs later to maint). + (merge 31a8aa1 rs/receive-pack-use-labs later to maint). + + * "gitweb" used to depend on a behaviour recent CGI.pm deprecated. + (merge 13dbf46 jk/gitweb-with-newer-cgi-multi-param later to maint). + + * "git init" (hence "git clone") initialized the per-repository + configuration file .git/config with x-bit by mistake. + (merge 1f32ecf mh/config-flip-xbit-back-after-checking later to maint). + + * Recent update in Git 2.2 started creating objects/info/packs and + info/refs files with permission bits tighter than user's umask. + (merge d91175b jk/prune-packed-server-info later to maint). + + * Git 2.0 was supposed to make the "simple" mode for the default of + "git push", but it didn't. + (merge 00a6fa0 jk/push-simple later to maint). + + * "Everyday" document had a broken link. + (merge 366c8d4 po/everyday-doc later to maint). + + * A few test fixes. + (merge 880ef58 jk/no-perl-tests later to maint). + + * The build procedure did not bother fixing perl and python scripts + when NO_PERL and NO_PYTHON build-time configuration changed. + (merge ca2051d jk/rebuild-perl-scripts-with-no-perl-seting-change later to maint). + + * The usage string of "git log" command was marked incorrectly for + l10n. + (merge e66dc0c km/log-usage-string-i18n later to maint). + + * "git for-each-ref" mishandled --format="%(upstream:track)" when a + branch is marked to have forked from a non-existing branch. + (merge b6160d9 rc/for-each-ref-tracking later to maint). diff --git a/Documentation/RelNotes/2.3.1.txt b/Documentation/RelNotes/2.3.1.txt new file mode 100644 index 0000000..cf96186 --- /dev/null +++ b/Documentation/RelNotes/2.3.1.txt @@ -0,0 +1,52 @@ +Git v2.3.1 Release Notes +======================== + +Fixes since v2.3 +---------------- + + * The interactive "show a list and let the user choose from it" + interface "add -i" used showed and prompted to the user even when + the candidate list was empty, against which the only "choice" the + user could have made was to choose nothing. + + * "git apply --whitespace=fix" used to under-allocate the memory + when the fix resulted in a longer text than the original patch. + + * "git log --help" used to show rev-list options that are irrelevant + to the "log" command. + + * The error message from "git commit", when a non-existing author + name was given as value to the "--author=" parameter, has been + reworded to avoid misunderstanding. + + * A broken pack .idx file in the receiving repository prevented the + dumb http transport from fetching a good copy of it from the other + side. + + * The documentation incorrectly said that C(opy) and R(ename) are the + only ones that can be followed by the score number in the output in + the --raw format. + + * Fix a misspelled conditional that is always true. + + * Code to read branch name from various files in .git/ directory + would have misbehaved if the code to write them left an empty file. + + * The "git push" documentation made the "--repo=<there>" option + easily misunderstood. + + * After attempting and failing a password-less authentication + (e.g. kerberos), libcURL refuses to fall back to password based + Basic authentication without a bit of help/encouragement. + + * Setting diff.submodule to 'log' made "git format-patch" produce + broken patches. + + * "git rerere" (invoked internally from many mergy operations) did + not correctly signal errors when told to update the working tree + files and failed to do so for whatever reason. + + * "git blame HEAD -- missing" failed to correctly say "HEAD" when it + tried to say "No such path 'missing' in HEAD". + +Also contains typofixes, documentation updates and trivial code clean-ups. diff --git a/Documentation/RelNotes/2.3.10.txt b/Documentation/RelNotes/2.3.10.txt new file mode 100644 index 0000000..9d425d8 --- /dev/null +++ b/Documentation/RelNotes/2.3.10.txt @@ -0,0 +1,18 @@ +Git v2.3.10 Release Notes +========================= + +Fixes since v2.3.9 +------------------ + + * xdiff code we use to generate diffs is not prepared to handle + extremely large files. It uses "int" in many places, which can + overflow if we have a very large number of lines or even bytes in + our input files, for example. Cap the input size to soemwhere + around 1GB for now. + + * Some protocols (like git-remote-ext) can execute arbitrary code + found in the URL. The URLs that submodules use may come from + arbitrary sources (e.g., .gitmodules files in a remote + repository), and can hurt those who blindly enable recursive + fetch. Restrict the allowed protocols to well known and safe + ones. diff --git a/Documentation/RelNotes/2.3.2.txt b/Documentation/RelNotes/2.3.2.txt new file mode 100644 index 0000000..93462e4 --- /dev/null +++ b/Documentation/RelNotes/2.3.2.txt @@ -0,0 +1,79 @@ +Git v2.3.2 Release Notes +======================== + +Fixes since v2.3.1 +------------------ + + * "update-index --refresh" used to leak when an entry cannot be + refreshed for whatever reason. + + * "git fast-import" used to crash when it could not close and + conclude the resulting packfile cleanly. + + * "git blame" died, trying to free an uninitialized piece of memory. + + * "git merge-file" did not work correctly in a subdirectory. + + * "git submodule add" failed to squash "path/to/././submodule" to + "path/to/submodule". + + * In v2.2.0, we broke "git prune" that runs in a repository that + borrows from an alternate object store. + + * Certain older vintages of cURL give irregular output from + "curl-config --vernum", which confused our build system. + + * An earlier workaround to squelch unhelpful deprecation warnings + from the compiler on Mac OSX unnecessarily set minimum required + version of the OS, which the user might want to raise (or lower) + for other reasons. + + * Longstanding configuration variable naming rules has been added to + the documentation. + + * The credential helper for Windows (in contrib/) used to mishandle + a user name with an at-sign in it. + + * Older GnuPG implementations may not correctly import the keyring + material we prepare for the tests to use. + + * Clarify in the documentation that "remote.<nick>.pushURL" and + "remote.<nick>.URL" are there to name the same repository accessed + via different transports, not two separate repositories. + + * The pack bitmap support did not build with older versions of GCC. + + * Reading configuration from a blob object, when it ends with a lone + CR, use to confuse the configuration parser. + + * We didn't format an integer that wouldn't fit in "int" but in + "uintmax_t" correctly. + + * "git push --signed" gave an incorrectly worded error message when + the other side did not support the capability. + + * "git fetch" over a remote-helper that cannot respond to "list" + command could not fetch from a symbolic reference e.g. HEAD. + + * The insn sheet "git rebase -i" creates did not fully honor + core.abbrev settings. + + * The tests that wanted to see that file becomes unreadable after + running "chmod a-r file", and the tests that wanted to make sure it + is not run as root, we used "can we write into the / directory?" as + a cheap substitute, but on some platforms that is not a good + heuristics. The tests and their prerequisites have been updated to + check what they really require. + + * The configuration variable 'mailinfo.scissors' was hard to + discover in the documentation. + + * Correct a breakage to git-svn around v2.2 era that triggers + premature closing of FileHandle. + + * Even though we officially haven't dropped Perl 5.8 support, the + Getopt::Long package that came with it does not support "--no-" + prefix to negate a boolean option; manually add support to help + people with older Getopt::Long package. + +Also contains typofixes, documentation updates and trivial code clean-ups. diff --git a/Documentation/RelNotes/2.3.3.txt b/Documentation/RelNotes/2.3.3.txt new file mode 100644 index 0000000..5ef1264 --- /dev/null +++ b/Documentation/RelNotes/2.3.3.txt @@ -0,0 +1,39 @@ +Git v2.3.3 Release Notes +======================== + +Fixes since v2.3.2 +------------------ + + * A corrupt input to "git diff -M" used cause us to segfault. + + * The borrowed code in kwset API did not follow our usual convention + to use "unsigned char" to store values that range from 0-255. + + * Description given by "grep -h" for its --exclude-standard option + was phrased poorly. + + * Documentaton for "git remote add" mentioned "--tags" and + "--no-tags" and it was not clear that fetch from the remote in + the future will use the default behaviour when neither is given + to override it. + + * "git diff --shortstat --dirstat=changes" showed a dirstat based on + lines that was never asked by the end user in addition to the + dirstat that the user asked for. + + * The interaction between "git submodule update" and the + submodule.*.update configuration was not clearly documented. + + * "git apply" was not very careful about reading from, removing, + updating and creating paths outside the working tree (under + --index/--cached) or the current directory (when used as a + replacement for GNU patch). + + * "git daemon" looked up the hostname even when "%CH" and "%IP" + interpolations are not requested, which was unnecessary. + + * The "interpolated-path" option of "git daemon" inserted any string + client declared on the "host=" capability request without checking. + Sanitize and limit %H and %CH to a saner and a valid DNS name. + +Also contains typofixes, documentation updates and trivial code clean-ups. diff --git a/Documentation/RelNotes/2.3.4.txt b/Documentation/RelNotes/2.3.4.txt new file mode 100644 index 0000000..094c7b8 --- /dev/null +++ b/Documentation/RelNotes/2.3.4.txt @@ -0,0 +1,32 @@ +Git v2.3.4 Release Notes +======================== + +Fixes since v2.3.3 +------------------ + + * The 'color.status.unmerged' configuration was not described. + + * "git log --decorate" did not reset colors correctly around the + branch names. + + * "git -C '' subcmd" refused to work in the current directory, unlike + "cd ''" which silently behaves as a no-op. + + * "git imap-send" learned to optionally talk with an IMAP server via + libcURL; because there is no other option when Git is built with + NO_OPENSSL option, use that codepath by default under such + configuration. + + * A workaround for certain build of GPG that triggered false breakage + in a test has been added. + + * "git rebase -i" recently started to include the number of + commits in the insn sheet to be processed, but on a platform + that prepends leading whitespaces to "wc -l" output, the numbers + are shown with extra whitespaces that aren't necessary. + + * We did not parse username followed by literal IPv6 address in SSH + transport URLs, e.g. ssh://user@[2001:db8::1]:22/repo.git + correctly. + +Also contains typofixes, documentation updates and trivial code clean-ups. diff --git a/Documentation/RelNotes/2.3.5.txt b/Documentation/RelNotes/2.3.5.txt new file mode 100644 index 0000000..5b309db --- /dev/null +++ b/Documentation/RelNotes/2.3.5.txt @@ -0,0 +1,44 @@ +Git v2.3.5 Release Notes +======================== + +Fixes since v2.3.4 +------------------ + + * The prompt script (in contrib/) did not show the untracked sign + when working in a subdirectory without any untracked files. + + * Even though "git grep --quiet" is run merely to ask for the exit + status, we spawned the pager regardless. Stop doing that. + + * Recommend format-patch and send-email for those who want to submit + patches to this project. + + * An failure early in the "git clone" that started creating the + working tree and repository could have resulted in some directories + and files left without getting cleaned up. + + * "git fetch" that fetches a commit using the allow-tip-sha1-in-want + extension could have failed to fetch all the requested refs. + + * The split-index mode introduced at v2.3.0-rc0~41 was broken in the + codepath to protect us against a broken reimplementation of Git + that writes an invalid index with duplicated index entries, etc. + + * "git prune" used to largely ignore broken refs when deciding which + objects are still being used, which could spread an existing small + damage and make it a larger one. + + * "git tag -h" used to show the "--column" and "--sort" options + that are about listing in a wrong section. + + * The transfer.hiderefs support did not quite work for smart-http + transport. + + * The code that reads from the ctags file in the completion script + (in contrib/) did not spell ${param/pattern/string} substitution + correctly, which happened to work with bash but not with zsh. + + * The explanation on "rebase --preserve-merges", "pull --rebase=preserve", + and "push --force-with-lease" in the documentation was unclear. + +Also contains typofixes, documentation updates and trivial code clean-ups. diff --git a/Documentation/RelNotes/2.3.6.txt b/Documentation/RelNotes/2.3.6.txt new file mode 100644 index 0000000..432f770 --- /dev/null +++ b/Documentation/RelNotes/2.3.6.txt @@ -0,0 +1,13 @@ +Git v2.3.6 Release Notes +======================== + +Fixes since v2.3.5 +------------------ + + * "diff-highlight" (in contrib/) used to show byte-by-byte + differences, which meant that multi-byte characters can be chopped + in the middle. It learned to pay attention to character boundaries + (assuming the UTF-8 payload). + +Also contains typofixes, documentation updates and trivial code +clean-ups. diff --git a/Documentation/RelNotes/2.3.7.txt b/Documentation/RelNotes/2.3.7.txt new file mode 100644 index 0000000..fc95812 --- /dev/null +++ b/Documentation/RelNotes/2.3.7.txt @@ -0,0 +1,21 @@ +Git v2.3.7 Release Notes +======================== + +Fixes since v2.3.6 +------------------ + + * An earlier update to the parser that disects a URL broke an + address, followed by a colon, followed by an empty string (instead + of the port number), e.g. ssh://example.com:/path/to/repo. + + * The completion script (in contrib/) contaminated global namespace + and clobbered on a shell variable $x. + + * The "git push --signed" protocol extension did not limit what the + "nonce" that is a server-chosen string can contain or how long it + can be, which was unnecessarily lax. Limit both the length and the + alphabet to a reasonably small space that can still have enough + entropy. + +Also contains typofixes, documentation updates and trivial code +clean-ups. diff --git a/Documentation/RelNotes/2.3.8.txt b/Documentation/RelNotes/2.3.8.txt new file mode 100644 index 0000000..0b67268 --- /dev/null +++ b/Documentation/RelNotes/2.3.8.txt @@ -0,0 +1,22 @@ +Git v2.3.8 Release Notes +======================== + +Fixes since v2.3.7 +------------------ + + * The usual "git diff" when seeing a file turning into a directory + showed a patchset to remove the file and create all files in the + directory, but "git diff --no-index" simply refused to work. Also, + when asked to compare a file and a directory, imitate POSIX "diff" + and compare the file with the file with the same name in the + directory, instead of refusing to run. + + * The default $HOME/.gitconfig file created upon "git config --global" + that edits it had incorrectly spelled user.name and user.email + entries in it. + + * "git commit --date=now" or anything that relies on approxidate lost + the daylight-saving-time offset. + +Also contains typofixes, documentation updates and trivial code +clean-ups. diff --git a/Documentation/RelNotes/2.3.9.txt b/Documentation/RelNotes/2.3.9.txt new file mode 100644 index 0000000..1a2ad32 --- /dev/null +++ b/Documentation/RelNotes/2.3.9.txt @@ -0,0 +1,9 @@ +Git v2.3.9 Release Notes +======================== + +Fixes since v2.3.8 +------------------ + + * A handful of codepaths that used to use fixed-sized arrays to hold + pathnames have been corrected to use strbuf and other mechanisms to + allow longer pathnames without fearing overflows. diff --git a/Documentation/RelNotes/2.4.0.txt b/Documentation/RelNotes/2.4.0.txt new file mode 100644 index 0000000..cde64be --- /dev/null +++ b/Documentation/RelNotes/2.4.0.txt @@ -0,0 +1,514 @@ +Git 2.4 Release Notes +===================== + +Backward compatibility warning(s) +--------------------------------- + +This release has a few changes in the user-visible output from +Porcelain commands. These are not meant to be parsed by scripts, but +users still may want to be aware of the changes: + + * The output from "git log --decorate" (and, more generally, the "%d" + format specifier used in the "--format=<string>" parameter to the + "git log" family of commands) has changed. It used to list "HEAD" + just like other branches; e.g., + + $ git log --decorate -1 master + commit bdb0f6788fa5e3cacc4315e9ff318a27b2676ff4 (HEAD, master) + ... + + This release changes the output slightly when HEAD refers to a + branch whose name is also shown in the output. The above is now + shown as: + + $ git log --decorate -1 master + commit bdb0f6788fa5e3cacc4315e9ff318a27b2676ff4 (HEAD -> master) + ... + + * The phrasing "git branch" uses to describe a detached HEAD has been + updated to agree with the phrasing used by "git status": + + - When HEAD is at the same commit as when it was originally + detached, they now both show "detached at <commit object name>". + + - When HEAD has moved since it was originally detached, they now + both show "detached from <commit object name>". + + Previously, "git branch" always used "from". + + +Updates since v2.3 +------------------ + +Ports + + * Our default I/O size (8 MiB) for large files was too large for some + platforms with smaller SSIZE_MAX, leading to read(2)/write(2) + failures. + + * We did not check the curl library version before using the + CURLOPT_PROXYAUTH feature, which did not exist in older versions of + the library. + + * We now detect number of CPUs on older BSD-derived systems. + + * Portability fixes and workarounds for shell scripts have been added + to help BSD-derived systems. + + +UI, Workflows & Features + + * The command usage info strings given by "git cmd -h" and in + documentation have been tweaked for consistency. + + * The "sync" subcommand of "git p4" now allows users to exclude + subdirectories like its "clone" subcommand does. + + * "git log --invert-grep --grep=WIP" will show only commits that do + not have the string "WIP" in their messages. + + * "git push" has been taught an "--atomic" option that makes a push + that updates more than one ref an "all-or-none" affair. + + * Extending the "push to deploy" feature that was added in 2.3, the + behaviour of "git push" when updating the branch that is checked + out can now be tweaked by a "push-to-checkout" hook. + + * HTTP-based transports now send Accept-Language when making + requests. The languages to accept are inferred from environment + variables on the client side (LANGUAGE, etc). + + * "git send-email" used to accept a mistaken "y" (or "yes") as an + answer to "What encoding do you want to use [UTF-8]?" without + questioning. Now it asks for confirmation when the answer looks too + short to be a valid encoding name. + + * When "git apply --whitespace=fix" fixed whitespace errors in the + common context lines, the command reports that it did so. + + * "git status" now allows the "-v" option to be given twice, in which + case it also shows the differences in the working tree that are not + staged to be committed. + + * "git cherry-pick" used to clean up the log message even when it is + merely replaying an existing commit. It now replays the message + verbatim unless you are editing the message of the resulting + commit. + + * "git archive" can now be told to set the 'text' attribute in the + resulting zip archive. + + * Output from "git log --decorate" now distinguishes between a + detached HEAD vs. a HEAD that points at a branch. + + This is a potentially backward-incompatible change; see above for + more information. + + * When HEAD was detached when at commit xyz and hasn't been moved + since it was detached, "git status" would report "detached at xyz" + whereas "git branch" would report "detached from xyz". Now the + output of "git branch" agrees with that of "git status". + + This is a potentially backward-incompatible change; see above for + more information. + + * "git -C '' subcmd" now works in the current directory (analogously + to "cd ''") rather than dying with an error message. + (merge 6a536e2 kn/git-cd-to-empty later to maint). + + * The versionsort.prereleaseSuffix configuration variable can be used + to specify that, for example, v1.0-pre1 comes before v1.0. + + * A new "push.followTags" configuration turns the "--follow-tags" + option on by default for the "git push" command. + + * "git log --graph --no-walk A B..." is a nonsensical combination of + options: "--no-walk" requests discrete points in the history, while + "--graph" asks to draw connections between these discrete points. + Forbid the use of these options together. + + * "git rev-list --bisect --first-parent" does not work (yet) and can + even cause SEGV; forbid it. "git log --bisect --first-parent" would + not be useful until "git bisect --first-parent" materializes, so + also forbid it for now. + + +Performance, Internal Implementation, Development Support etc. + + * Slightly change the implementation of the N_() macro to help us + detect mistakes. + + * Restructure the implementation of "reflog expire" to fit better + with the recently updated reference API. + + * The transport-helper did not pass transport options such as + verbosity, progress, cloning, etc. to import and export based + helpers, like it did for fetch and push based helpers, robbing them + of the chance to honor the wish of the end-users better. + + * The tests that wanted to see that a file becomes unreadable after + running "chmod a-r file", and the tests that wanted to make sure + that they are not run as root, used "can we write into the / + directory?" as a cheap substitute. But on some platforms that is + not a good heuristic. The tests and their prerequisites have been + updated to check what they really require. + (merge f400e51 jk/sanity later to maint). + + * Various issues around "reflog expire", e.g. using --updateref when + expiring a reflog for a symbolic reference, have been corrected + and/or made saner. + + * The documentation for the strbuf API had been split between the API + documentation and the header file. Consolidate the documentation in + strbuf.h. + + * The error handling functions and conventions are now documented in + the API manual (in api-error-handling.txt). + + * Optimize gitattribute look-up, mostly useful in "git grep" on a + project that does not use many attributes, by avoiding it when we + (should) know that the attributes are not defined in the first + place. + + * Typofix in comments. + (merge ef2956a ak/git-pm-typofix later to maint). + + * Code clean-up. + (merge 0b868f0 sb/hex-object-name-is-at-most-41-bytes-long later to maint). + (merge 5d30851 dp/remove-duplicated-header-inclusion later to maint). + + * Simplify the ref transaction API for verifying that "the ref should + be pointing at this object". + + * Simplify the code in "git daemon" that parses out and holds + hostnames used in request interpolation. + + * Restructure the "git push" codepath to make it easier to add new + configuration bits. + + * The run-command interface made it easy to make a pipe for us to + read from a process, wait for the process to finish, and then + attempt to read its output. But this pattern can lead to deadlock. + So introduce a helper to do this correctly (i.e., first read, and + then wait the process to finish) and also add code to prevent such + abuse in the run-command helper. + + * People often forget to chain the commands in their test together + with &&, letting a failure from an earlier command in the test go + unnoticed. The new GIT_TEST_CHAIN_LINT mechanism allows you to + catch such a mistake more easily. + + +Also contains various documentation updates and code clean-ups. + + +Fixes since v2.3 +---------------- + +Unless otherwise noted, all the fixes since v2.3 in the maintenance +track are contained in this release (see the maintenance releases' +notes for details). + + * "git blame HEAD -- missing" failed to correctly say "HEAD" when it + tried to say "No such path 'missing' in HEAD". + (merge a46442f jk/blame-commit-label later to maint). + + * "git rerere" (invoked internally from many mergy operations) did + not correctly signal errors when it attempted to update the working + tree files but failed for whatever reason. + (merge 89ea903 jn/rerere-fail-on-auto-update-failure later to maint). + + * Setting diff.submodule to 'log' made "git format-patch" produce + broken patches. + (merge 339de50 dk/format-patch-ignore-diff-submodule later to maint). + + * After attempting and failing a password-less authentication (e.g., + Kerberos), libcURL refuses to fall back to password-based Basic + authentication without a bit of help/encouragement. + (merge 4dbe664 bc/http-fallback-to-password-after-krb-fails later to maint). + + * The "git push" documentation for the "--repo=<there>" option was + easily misunderstood. + (merge 57b92a7 mg/push-repo-option-doc later to maint). + + * Code to read a branch name from various files in the .git/ + directory would have overrun array limits if asked to read an empty + file. + (merge 66ec904 jk/status-read-branch-name-fix later to maint). + + * Remove a superfluous conditional that is always true. + (merge 94ee8e2 jk/remote-curl-an-array-in-struct-cannot-be-null later to maint). + + * The "git diff --raw" documentation incorrectly implied that C(opy) + and R(ename) are the only statuses that can be followed by a score + number. + (merge ac1c2d9 jc/diff-format-doc later to maint). + + * A broken pack .idx file in the receiving repository prevented the + dumb http transport from fetching a good copy of it from the other + side. + (merge 8b9c2dd jk/dumb-http-idx-fetch-fix later to maint). + + * The error message from "git commit", when a non-existing author + name was given as value to the "--author=" parameter, has been + reworded to avoid misunderstanding. + (merge 1044b1f mg/commit-author-no-match-malformed-message later to maint). + + * "git log --help" used to show rev-list options that are irrelevant + to the "log" command. + (merge 3cab02d jc/doc-log-rev-list-options later to maint). + + * "git apply --whitespace=fix" used to under-allocate memory when the + fix resulted in a longer text than the original patch. + (merge 407a792 jc/apply-ws-fix-expands later to maint). + + * The interactive "show a list and let the user choose from it" + interface used by "git add -i" unnecessarily prompted the user even + when the candidate list was empty, against which the only "choice" + the user could have made was to choose nothing. + (merge a9c4641 ak/add-i-empty-candidates later to maint). + + * The todo list created by "git rebase -i" did not fully honor + core.abbrev settings. + (merge edb72d5 ks/rebase-i-abbrev later to maint). + + * "git fetch" over a remote-helper that cannot respond to the "list" + command could not fetch from a symbolic reference (e.g., HEAD). + (merge 33cae54 mh/deref-symref-over-helper-transport later to maint). + + * "git push --signed" gave an incorrectly worded error message when + the other side did not support the capability. + + * The "git push --signed" protocol extension did not limit what the + "nonce" (a server-chosen string) could contain nor how long it + could be, which was unnecessarily lax. Limit both the length and + the alphabet to a reasonably small space that can still have enough + entropy. + (merge afcb6ee jc/push-cert later to maint). + + * The completion script (in contrib/) clobbered the shell variable $x + in the global shell namespace. + (merge 852ff1c ma/bash-completion-leaking-x later to maint). + + * We incorrectly formatted a "uintmax_t" integer that doesn't fit in + "int". + (merge d306f3d jk/decimal-width-for-uintmax later to maint). + + * The configuration parser used to be confused when reading + configuration from a blob object that ends with a lone CR. + (merge 1d0655c jk/config-no-ungetc-eof later to maint). + + * The pack bitmap support did not build with older versions of GCC. + (merge bd4e882 jk/pack-bitmap later to maint). + + * The documentation wasn't clear that "remote.<nick>.pushURL" and + "remote.<nick>.URL" are there to name the same repository accessed + via different transports, not two separate repositories. + (merge 697f652 jc/remote-set-url-doc later to maint). + + * Older GnuPG implementations may not correctly import the keyring + material we prepare for the tests to use. + (merge 1f985d6 ch/new-gpg-drops-rfc-1991 later to maint). + + * The credential helper for Windows (in contrib/) used to mishandle + user names that contain an at-sign. + (merge 13d261e av/wincred-with-at-in-username-fix later to maint). + + * "diff-highlight" (in contrib/) used to show byte-by-byte + differences, which could cause multi-byte characters to be chopped + in the middle. It learned to pay attention to character boundaries + (assuming UTF-8). + (merge 8d00662 jk/colors later to maint). + + * Document longstanding configuration variable naming rules in + CodingGuidelines. + (merge 35840a3 jc/conf-var-doc later to maint). + + * An earlier workaround to squelch unhelpful deprecation warnings + from the compiler on OS X unnecessarily set a minimum required + version of the OS, which the user might want to raise (or lower) + for other reasons. + (merge 88c03eb es/squelch-openssl-warnings-on-macosx later to maint). + + * Certain older vintages of cURL give irregular output from + "curl-config --vernum", which confused our build system. + (merge 3af6792 tc/curl-vernum-output-broken-in-7.11 later to maint). + + * In v2.2.0, we broke "git prune" that runs in a repository that + borrows from an alternate object store. + (merge b0a4264 jk/prune-mtime later to maint). + + * "git submodule add" failed to squash "path/to/././submodule" to + "path/to/submodule". + (merge 8196e72 ps/submodule-sanitize-path-upon-add later to maint). + + * "git merge-file" did not work correctly when invoked in a + subdirectory. + (merge 204a8ff ab/merge-file-prefix later to maint). + + * "git blame" could die trying to free an uninitialized piece of + memory. + (merge e600592 es/blame-commit-info-fix later to maint). + + * "git fast-import" used to crash when it could not close and + finalize the resulting packfile cleanly. + (merge 5e915f3 jk/fast-import-die-nicely-fix later to maint). + + * "update-index --refresh" used to leak memory when an entry could + not be refreshed for whatever reason. + (merge bc1c2ca sb/plug-leak-in-make-cache-entry later to maint). + + * The "interpolated-path" option of "git daemon" inserted any string + the client declared on the "host=" capability request without + checking. Sanitize and limit %H and %CH to a saner and a valid DNS + name. + (merge b485373 jk/daemon-interpolate later to maint). + + * "git daemon" unnecessarily looked up the hostname even when "%CH" + and "%IP" interpolations were not requested. + (merge dc8edc8 rs/daemon-interpolate later to maint). + + * We relied on "--no-" prefix handling in Perl's Getopt::Long + package, even though that support didn't exist in Perl 5.8 (which + we still support). Manually add support to help people with older + Getopt::Long packages. + (merge f471494 km/send-email-getopt-long-workarounds later to maint). + + * "git apply" was not very careful about reading from, removing, + updating and creating paths outside the working tree (under + --index/--cached) or the current directory (when used as a + replacement for GNU patch). + (merge e0d201b jc/apply-beyond-symlink later to maint). + + * Correct a breakage in git-svn, introduced around the v2.2 era, that + can cause FileHandles to be closed prematurely. + (merge e426311 ew/svn-maint-fixes later to maint). + + * We did not parse usernames followed by literal IPv6 addresses + correctly in SSH transport URLs; e.g., + ssh://user@[2001:db8::1]:22/repo.git. + (merge 6b6c5f7 tb/connect-ipv6-parse-fix later to maint). + + * The configuration variable 'mailinfo.scissors' was hard to + discover in the documentation. + (merge afb5de7 mm/am-c-doc later to maint). + + * The interaction between "git submodule update" and the + submodule.*.update configuration was not clearly documented. + (merge 5c31acf ms/submodule-update-config-doc later to maint). + + * "git diff --shortstat" used together with "--dirstat=changes" or + "--dirstat=files" incorrectly output dirstat information twice. + (merge ab27389 mk/diff-shortstat-dirstat-fix later to maint). + + * The manpage for "git remote add" mentioned "--tags" and "--no-tags" + but did not explain what happens if neither option is provided. + (merge aaba0ab mg/doc-remote-tags-or-not later to maint). + + * The description of "--exclude-standard option" in the output of + "git grep -h" was phrased poorly. + (merge 77fdb8a nd/grep-exclude-standard-help-fix later to maint). + + * "git rebase -i" recently started to include the number of commits + in the todo list, but that output included extraneous whitespace on + a platform that prepends leading whitespaces to its "wc -l" output. + (merge 2185d3b es/rebase-i-count-todo later to maint). + + * The borrowed code in the kwset API did not follow our usual + convention to use "unsigned char" to store values that range from + 0-255. + (merge 189c860 bw/kwset-use-unsigned later to maint). + + * A corrupt input to "git diff -M" used to cause it to segfault. + (merge 4d6be03 jk/diffcore-rename-duplicate later to maint). + + * Certain builds of GPG triggered false breakages in a test. + (merge 3f88c1b mg/verify-commit later to maint). + + * "git imap-send" learned to optionally talk with an IMAP server via + libcURL. Because there is no other option when Git is built with + the NO_OPENSSL option, use libcURL by default in that case. + (merge dcd01ea km/imap-send-libcurl-options later to maint). + + * "git log --decorate" did not reset colors correctly around the + branch names. + (merge 5ee8758 jc/decorate-leaky-separator-color later to maint). + + * The code that reads from the ctags file in the completion script + (in contrib/) did not spell ${param/pattern/string} substitution + correctly, which happened to work with bash but not with zsh. + (merge db8d750 js/completion-ctags-pattern-substitution-fix later to maint). + + * The transfer.hiderefs support did not quite work for smart-http + transport. + (merge 8ddf3ca jk/smart-http-hide-refs later to maint). + + * In the "git tag -h" output, move the documentation for the + "--column" and "--sort" options to the "Tag listing options" + section. + (merge dd059c6 jk/tag-h-column-is-a-listing-option later to maint). + + * "git prune" used to largely ignore broken refs when deciding which + objects are still being used, which could cause reference + corruption to lead to object loss. + (merge ea56c4e jk/prune-with-corrupt-refs later to maint). + + * The split-index mode introduced in v2.3.0-rc0~41 was broken in the + codepath to protect us against a broken reimplementation of Git + that writes an invalid index with duplicated index entries, etc. + (merge 03f15a7 tg/fix-check-order-with-split-index later to maint). + + * "git fetch", when fetching a commit using the + allow-tip-sha1-in-want extension, could have failed to fetch all of + the requested refs. + (merge 32d0462 jk/fetch-pack later to maint). + + * An failure early in the "git clone" that started creating the + working tree and repository could have resulted in the failure to + clean up some directories and files. + (merge 16eff6c jk/cleanup-failed-clone later to maint). + + * Recommend format-patch and send-email for those who want to submit + patches to this project. + (merge b25c469 jc/submitting-patches-mention-send-email later to maint). + + * Do not spawn the pager when "git grep" is run with "--quiet". + (merge c2048f0 ws/grep-quiet-no-pager later to maint). + + * The prompt script (in contrib/) did not show the untracked sign + when working in a subdirectory without any untracked files. + (merge 9bdc517 ct/prompt-untracked-fix later to maint). + + * An earlier update to the URL parser broke an address that contains + a colon but an empty string for the port number, like + ssh://example.com:/path/to/repo. + (merge 6b6c5f7 tb/connect-ipv6-parse-fix later to maint). + + * Code cleanups and documentation updates. + (merge 2ce63e9 rs/simple-cleanups later to maint). + (merge 33baa69 rj/no-xopen-source-for-cygwin later to maint). + (merge 817d03e jc/diff-test-updates later to maint). + (merge eb32c66 ak/t5516-typofix later to maint). + (merge bcd57cb mr/doc-clean-f-f later to maint). + (merge 0d6accc mg/doc-status-color-slot later to maint). + (merge 53e53c7 sg/completion-remote later to maint). + (merge 8fa7975 ak/git-done-help-cleanup later to maint). + (merge 9a6f128 rs/deflate-init-cleanup later to maint). + (merge 6f75d45 rs/use-isxdigit later to maint). + (merge 376e4b3 jk/test-annoyances later to maint). + (merge 7032054 nd/doc-git-index-version later to maint). + (merge e869c5e tg/test-index-v4 later to maint). + (merge 599d223 jk/simplify-csum-file-sha1fd-check later to maint). + (merge 260d585 sg/completion-gitcomp-nl-for-refs later to maint). + (merge 777c55a jc/report-path-error-to-dir later to maint). + (merge fddfaf8 ph/push-doc-cas later to maint). + (merge d50d31e ss/pull-rebase-preserve later to maint). + (merge c8c3f1d pt/enter-repo-comment-fix later to maint). + (merge d7bfb9e jz/gitweb-conf-doc-fix later to maint). + (merge f907282 jk/cherry-pick-docfix later to maint). + (merge d3c0811 iu/fix-parse-options-h-comment later to maint). + (merge 6c3b2af jg/cguide-we-cannot-count later to maint). + (merge 2b8bd44 jk/pack-corruption-post-mortem later to maint). + (merge 9585cb8 jn/doc-fast-import-no-16-octopus-limit later to maint). + (merge 5dcd1b1 ps/grep-help-all-callback-arg later to maint). + (merge f1f4c84 va/fix-git-p4-tests later to maint). diff --git a/Documentation/RelNotes/2.4.1.txt b/Documentation/RelNotes/2.4.1.txt new file mode 100644 index 0000000..a65a6c5 --- /dev/null +++ b/Documentation/RelNotes/2.4.1.txt @@ -0,0 +1,40 @@ +Git v2.4.1 Release Notes +======================== + +Fixes since v2.4 +---------------- + + * The usual "git diff" when seeing a file turning into a directory + showed a patchset to remove the file and create all files in the + directory, but "git diff --no-index" simply refused to work. Also, + when asked to compare a file and a directory, imitate POSIX "diff" + and compare the file with the file with the same name in the + directory, instead of refusing to run. + + * The default $HOME/.gitconfig file created upon "git config --global" + that edits it had incorrectly spelled user.name and user.email + entries in it. + + * "git commit --date=now" or anything that relies on approxidate lost + the daylight-saving-time offset. + + * "git cat-file bl $blob" failed to barf even though there is no + object type that is "bl". + + * Teach the codepaths that read .gitignore and .gitattributes files + that these files encoded in UTF-8 may have UTF-8 BOM marker at the + beginning; this makes it in line with what we do for configuration + files already. + + * Access to objects in repositories that borrow from another one on a + slow NFS server unnecessarily got more expensive due to recent code + becoming more cautious in a naive way not to lose objects to pruning. + + * We avoid setting core.worktree when the repository location is the + ".git" directory directly at the top level of the working tree, but + the code misdetected the case in which the working tree is at the + root level of the filesystem (which arguably is a silly thing to + do, but still valid). + +Also contains typofixes, documentation updates and trivial code +clean-ups. diff --git a/Documentation/RelNotes/2.4.10.txt b/Documentation/RelNotes/2.4.10.txt new file mode 100644 index 0000000..8621199 --- /dev/null +++ b/Documentation/RelNotes/2.4.10.txt @@ -0,0 +1,18 @@ +Git v2.4.10 Release Notes +========================= + +Fixes since v2.4.9 +------------------ + + * xdiff code we use to generate diffs is not prepared to handle + extremely large files. It uses "int" in many places, which can + overflow if we have a very large number of lines or even bytes in + our input files, for example. Cap the input size to soemwhere + around 1GB for now. + + * Some protocols (like git-remote-ext) can execute arbitrary code + found in the URL. The URLs that submodules use may come from + arbitrary sources (e.g., .gitmodules files in a remote + repository), and can hurt those who blindly enable recursive + fetch. Restrict the allowed protocols to well known and safe + ones. diff --git a/Documentation/RelNotes/2.4.11.txt b/Documentation/RelNotes/2.4.11.txt new file mode 100644 index 0000000..7233602 --- /dev/null +++ b/Documentation/RelNotes/2.4.11.txt @@ -0,0 +1,11 @@ +Git v2.4.11 Release Notes +========================= + +Fixes since v2.4.10 +------------------- + + * Bugfix patches were backported from the 'master' front to plug heap + corruption holes, to catch integer overflow in the computation of + pathname lengths, and to get rid of the name_path API. Both of + these would have resulted in writing over an under-allocated buffer + when formulating pathnames while tree traversal. diff --git a/Documentation/RelNotes/2.4.2.txt b/Documentation/RelNotes/2.4.2.txt new file mode 100644 index 0000000..250cdc4 --- /dev/null +++ b/Documentation/RelNotes/2.4.2.txt @@ -0,0 +1,45 @@ +Git v2.4.2 Release Notes +======================== + +Fixes since v2.4.1 +------------------ + + * "git rev-list --objects $old --not --all" to see if everything that + is reachable from $old is already connected to the existing refs + was very inefficient. + + * "hash-object --literally" introduced in v2.2 was not prepared to + take a really long object type name. + + * "git rebase --quiet" was not quite quiet when there is nothing to + do. + + * The completion for "log --decorate=" parameter value was incorrect. + + * "filter-branch" corrupted commit log message that ends with an + incomplete line on platforms with some "sed" implementations that + munge such a line. Work it around by avoiding to use "sed". + + * "git daemon" fails to build from the source under NO_IPV6 + configuration (regression in 2.4). + + * "git stash pop/apply" forgot to make sure that not just the working + tree is clean but also the index is clean. The latter is important + as a stash application can conflict and the index will be used for + conflict resolution. + + * We have prepended $GIT_EXEC_PATH and the path "git" is installed in + (typically "/usr/bin") to $PATH when invoking subprograms and hooks + for almost eternity, but the original use case the latter tried to + support was semi-bogus (i.e. install git to /opt/foo/git and run it + without having /opt/foo on $PATH), and more importantly it has + become less and less relevant as Git grew more mainstream (i.e. the + users would _want_ to have it on their $PATH). Stop prepending the + path in which "git" is installed to users' $PATH, as that would + interfere the command search order people depend on (e.g. they may + not like versions of programs that are unrelated to Git in /usr/bin + and want to override them by having different ones in /usr/local/bin + and have the latter directory earlier in their $PATH). + +Also contains typofixes, documentation updates and trivial code +clean-ups. diff --git a/Documentation/RelNotes/2.4.3.txt b/Documentation/RelNotes/2.4.3.txt new file mode 100644 index 0000000..914d2c1 --- /dev/null +++ b/Documentation/RelNotes/2.4.3.txt @@ -0,0 +1,76 @@ +Git v2.4.3 Release Notes +======================== + +Fixes since v2.4.3 +------------------ + + * Error messages from "git branch" called remote-tracking branches as + "remote branches". + + * "git rerere forget" in a repository without rerere enabled gave a + cryptic error message; it should be a silent no-op instead. + + * "git pull --log" and "git pull --no-log" worked as expected, but + "git pull --log=20" did not. + + * The pull.ff configuration was supposed to override the merge.ff + configuration, but it didn't. + + * The code to read pack-bitmap wanted to allocate a few hundred + pointers to a structure, but by mistake allocated and leaked memory + enough to hold that many actual structures. Correct the allocation + size and also have it on stack, as it is small enough. + + * Various documentation mark-up fixes to make the output more + consistent in general and also make AsciiDoctor (an alternative + formatter) happier. + + * "git bundle verify" did not diagnose extra parameters on the + command line. + + * Multi-ref transaction support we merged a few releases ago + unnecessarily kept many file descriptors open, risking to fail with + resource exhaustion. + + * The ref API did not handle cases where 'refs/heads/xyzzy/frotz' is + removed at the same time as 'refs/heads/xyzzy' is added (or vice + versa) very well. + + * The "log --decorate" enhancement in Git 2.4 that shows the commit + at the tip of the current branch e.g. "HEAD -> master", did not + work with --decorate=full. + + * There was a commented-out (instead of being marked to expect + failure) test that documented a breakage that was fixed since the + test was written; turn it into a proper test. + + * core.excludesfile (defaulting to $XDG_HOME/git/ignore) is supposed + to be overridden by repository-specific .git/info/exclude file, but + the order was swapped from the beginning. This belatedly fixes it. + + * The connection initiation code for "ssh" transport tried to absorb + differences between the stock "ssh" and Putty-supplied "plink" and + its derivatives, but the logic to tell that we are using "plink" + variants were too loose and falsely triggered when "plink" appeared + anywhere in the path (e.g. "/home/me/bin/uplink/ssh"). + + * "git rebase -i" moved the "current" command from "todo" to "done" a + bit too prematurely, losing a step when a "pick" did not even start. + + * "git add -e" did not allow the user to abort the operation by + killing the editor. + + * Git 2.4 broke setting verbosity and progress levels on "git clone" + with native transports. + + * Some time ago, "git blame" (incorrectly) lost the convert_to_git() + call when synthesizing a fake "tip" commit that represents the + state in the working tree, which broke folks who record the history + with LF line ending to make their project portabile across + platforms while terminating lines in their working tree files with + CRLF for their platform. + + * Code clean-up for xdg configuration path support. + +Also contains typofixes, documentation updates and trivial code +clean-ups. diff --git a/Documentation/RelNotes/2.4.4.txt b/Documentation/RelNotes/2.4.4.txt new file mode 100644 index 0000000..f1ccd00 --- /dev/null +++ b/Documentation/RelNotes/2.4.4.txt @@ -0,0 +1,35 @@ +Git v2.4.4 Release Notes +======================== + +Fixes since v2.4.3 +------------------ + + * l10n updates for German. + + * An earlier leakfix to bitmap testing code was incomplete. + + * "git clean pathspec..." tried to lstat(2) and complain even for + paths outside the given pathspec. + + * Communication between the HTTP server and http_backend process can + lead to a dead-lock when relaying a large ref negotiation request. + Diagnose the situation better, and mitigate it by reading such a + request first into core (to a reasonable limit). + + * The clean/smudge interface did not work well when filtering an + empty contents (failed and then passed the empty input through). + It can be argued that a filter that produces anything but empty for + an empty input is nonsense, but if the user wants to do strange + things, then why not? + + * Make "git stash something --help" error out, so that users can + safely say "git stash drop --help". + + * Clarify that "log --raw" and "log --format=raw" are unrelated + concepts. + + * Catch a programmer mistake to feed a pointer not an array to + ARRAY_SIZE() macro, by using a couple of GCC extensions. + +Also contains typofixes, documentation updates and trivial code +clean-ups. diff --git a/Documentation/RelNotes/2.4.5.txt b/Documentation/RelNotes/2.4.5.txt new file mode 100644 index 0000000..568297c --- /dev/null +++ b/Documentation/RelNotes/2.4.5.txt @@ -0,0 +1,28 @@ +Git v2.4.5 Release Notes +======================== + +Fixes since v2.4.4 +------------------ + + * The setup code used to die when core.bare and core.worktree are set + inconsistently, even for commands that do not need working tree. + + * There was a dead code that used to handle "git pull --tags" and + show special-cased error message, which was made irrelevant when + the semantics of the option changed back in Git 1.9 days. + + * "color.diff.plain" was a misnomer; give it 'color.diff.context' as + a more logical synonym. + + * The configuration reader/writer uses mmap(2) interface to access + the files; when we find a directory, it barfed with "Out of memory?". + + * Recent "git prune" traverses young unreachable objects to safekeep + old objects in the reachability chain from them, which sometimes + showed unnecessary error messages that are alarming. + + * "git rebase -i" fired post-rewrite hook when it shouldn't (namely, + when it was told to stop sequencing with 'exec' insn). + +Also contains typofixes, documentation updates and trivial code +clean-ups. diff --git a/Documentation/RelNotes/2.4.6.txt b/Documentation/RelNotes/2.4.6.txt new file mode 100644 index 0000000..b53f353 --- /dev/null +++ b/Documentation/RelNotes/2.4.6.txt @@ -0,0 +1,23 @@ +Git v2.4.6 Release Notes +======================== + +Fixes since v2.4.5 +------------------ + + * "git fetch --depth=<depth>" and "git clone --depth=<depth>" issued + a shallow transfer request even to an upload-pack that does not + support the capability. + + * "git fsck" used to ignore missing or invalid objects recorded in reflog. + + * The tcsh completion writes a bash scriptlet but that would have + failed for users with noclobber set. + + * Recent Mac OS X updates breaks the logic to detect that the machine + is on the AC power in the sample pre-auto-gc script. + + * "git format-patch --ignore-if-upstream A..B" did not like to be fed + tags as boundary commits. + +Also contains typofixes, documentation updates and trivial code +clean-ups. diff --git a/Documentation/RelNotes/2.4.7.txt b/Documentation/RelNotes/2.4.7.txt new file mode 100644 index 0000000..b3ac412 --- /dev/null +++ b/Documentation/RelNotes/2.4.7.txt @@ -0,0 +1,53 @@ +Git v2.4.7 Release Notes +======================== + +Fixes since v2.4.6 +------------------ + + * A minor regression to "git fsck" in v2.2 era was fixed; it + complained about a body-less tag object when it lacked a + separator empty line after its header to separate it with a + non-existent body. + + * We used to ask libCURL to use the most secure authentication method + available when talking to an HTTP proxy only when we were told to + talk to one via configuration variables. We now ask libCURL to + always use the most secure authentication method, because the user + can tell libCURL to use an HTTP proxy via an environment variable + without using configuration variables. + + * When you say "!<ENTER>" while running say "git log", you'd confuse + yourself in the resulting shell, that may look as if you took + control back to the original shell you spawned "git log" from but + that isn't what is happening. To that new shell, we leaked + GIT_PAGER_IN_USE environment variable that was meant as a local + communication between the original "Git" and subprocesses that was + spawned by it after we launched the pager, which caused many + "interesting" things to happen, e.g. "git diff | cat" still paints + its output in color by default. + + Stop leaking that environment variable to the pager's half of the + fork; we only need it on "Git" side when we spawn the pager. + + * Avoid possible ssize_t to int truncation. + + * "git config" failed to update the configuration file when the + underlying filesystem is incapable of renaming a file that is still + open. + + * A minor bugfix when pack bitmap is used with "rev-list --count". + + * An ancient test framework enhancement to allow color was not + entirely correct; this makes it work even when tput needs to read + from the ~/.terminfo under the user's real HOME directory. + + * Fix a small bug in our use of umask() return value. + + * "git rebase" did not exit with failure when format-patch it invoked + failed for whatever reason. + + * Disable "have we lost a race with competing repack?" check while + receiving a huge object transfer that runs index-pack. + +Also contains typofixes, documentation updates and trivial code +clean-ups. diff --git a/Documentation/RelNotes/2.4.8.txt b/Documentation/RelNotes/2.4.8.txt new file mode 100644 index 0000000..ad946b2 --- /dev/null +++ b/Documentation/RelNotes/2.4.8.txt @@ -0,0 +1,21 @@ +Git v2.4.8 Release Notes +======================== + +Fixes since v2.4.7 +------------------ + + * Abandoning an already applied change in "git rebase -i" with + "--continue" left CHERRY_PICK_HEAD and confused later steps. + + * Various fixes around "git am" that applies a patch to a history + that is not there yet. + + * "git for-each-ref" reported "missing object" for 0{40} when it + encounters a broken ref. The lack of object whose name is 0{40} is + not the problem; the ref being broken is. + + * "git commit --cleanup=scissors" was not careful enough to protect + against getting fooled by a line that looked like scissors. + +Also contains typofixes, documentation updates and trivial code +clean-ups. diff --git a/Documentation/RelNotes/2.4.9.txt b/Documentation/RelNotes/2.4.9.txt new file mode 100644 index 0000000..09af9dd --- /dev/null +++ b/Documentation/RelNotes/2.4.9.txt @@ -0,0 +1,9 @@ +Git v2.4.9 Release Notes +======================== + +Fixes since v2.4.9 +------------------ + + * A handful of codepaths that used to use fixed-sized arrays to hold + pathnames have been corrected to use strbuf and other mechanisms to + allow longer pathnames without fearing overflows. diff --git a/Documentation/RelNotes/2.5.0.txt b/Documentation/RelNotes/2.5.0.txt new file mode 100644 index 0000000..8704450 --- /dev/null +++ b/Documentation/RelNotes/2.5.0.txt @@ -0,0 +1,563 @@ +Git 2.5 Release Notes +===================== + +Updates since v2.4 +------------------ + +UI, Workflows & Features + + * The bash completion script (in contrib/) learned a few options that + "git revert" takes. + + * Whitespace breakages in deleted and context lines can also be + painted in the output of "git diff" and friends with the new + --ws-error-highlight option. + + * List of commands shown by "git help" are grouped along the workflow + elements to help early learners. + + * "git p4" now detects the filetype (e.g. binary) correctly even when + the files are opened exclusively. + + * git p4 attempts to better handle branches in Perforce. + + * "git p4" learned "--changes-block-size <n>" to read the changes in + chunks from Perforce, instead of making one call to "p4 changes" + that may trigger "too many rows scanned" error from Perforce. + + * More workaround for Perforce's row number limit in "git p4". + + * Unlike "$EDITOR" and "$GIT_EDITOR" that can hold the path to the + command and initial options (e.g. "/path/to/emacs -nw"), 'git p4' + did not let the shell interpolate the contents of the environment + variable that name the editor "$P4EDITOR" (and "$EDITOR", too). + This release makes it in line with the rest of Git, as well as with + Perforce. + + * A new short-hand <branch>@{push} denotes the remote-tracking branch + that tracks the branch at the remote the <branch> would be pushed + to. + + * "git show-branch --topics HEAD" (with no other arguments) did not + do anything interesting. Instead, contrast the given revision + against all the local branches by default. + + * A replacement for contrib/workdir/git-new-workdir that does not + rely on symbolic links and make sharing of objects and refs safer + by making the borrowee and borrowers aware of each other. + + Consider this as still an experimental feature; its UI is still + likely to change. + + * Tweak the sample "store" backend of the credential helper to honor + XDG configuration file locations when specified. + + * A heuristic we use to catch mistyped paths on the command line + "git <cmd> <revs> <pathspec>" is to make sure that all the non-rev + parameters in the later part of the command line are names of the + files in the working tree, but that means "git grep $str -- \*.c" + must always be disambiguated with "--", because nobody sane will + create a file whose name literally is asterisk-dot-see. Loosen the + heuristic to declare that with a wildcard string the user likely + meant to give us a pathspec. + + * "git merge FETCH_HEAD" learned that the previous "git fetch" could + be to create an Octopus merge, i.e. recording multiple branches + that are not marked as "not-for-merge"; this allows us to lose an + old style invocation "git merge <msg> HEAD $commits..." in the + implementation of "git pull" script; the old style syntax can now + be deprecated (but not removed yet). + + * Filter scripts were run with SIGPIPE disabled on the Git side, + expecting that they may not read what Git feeds them to filter. + We however treated a filter that does not read its input fully + before exiting as an error. We no longer do and ignore EPIPE + when writing to feed the filter scripts. + + This changes semantics, but arguably in a good way. If a filter + can produce its output without fully consuming its input using + whatever magic, we now let it do so, instead of diagnosing it + as a programming error. + + * Instead of dying immediately upon failing to obtain a lock, the + locking (of refs etc) retries after a short while with backoff. + + * Introduce http.<url>.SSLCipherList configuration variable to tweak + the list of cipher suite to be used with libcURL when talking with + https:// sites. + + * "git subtree" script (in contrib/) used "echo -n" to produce + progress messages in a non-portable way. + + * "git subtree" script (in contrib/) does not have --squash option + when pushing, but the documentation and help text pretended as if + it did. + + * The Git subcommand completion (in contrib/) no longer lists credential + helpers among candidates; they are not something the end user would + invoke interactively. + + * The index file can be taught with "update-index --untracked-cache" + to optionally remember already seen untracked files, in order to + speed up "git status" in a working tree with tons of cruft. + + * "git mergetool" learned to drive WinMerge as a backend. + + * "git upload-pack" that serves "git fetch" can be told to serve + commits that are not at the tip of any ref, as long as they are + reachable from a ref, with uploadpack.allowReachableSHA1InWant + configuration variable. + + * "git cat-file --batch(-check)" learned the "--follow-symlinks" + option that follows an in-tree symbolic link when asked about an + object via extended SHA-1 syntax, e.g. HEAD:RelNotes that points at + Documentation/RelNotes/2.5.0.txt. With the new option, the command + behaves as if HEAD:Documentation/RelNotes/2.5.0.txt was given as + input instead. + + Consider this as still an experimental and incomplete feature: + + - We may want to do the same for in-index objects, e.g. + asking for :RelNotes with this option should give + :Documentation/RelNotes/2.5.0.txt, too + + - "git cat-file --follow-symlinks blob HEAD:RelNotes" + may also be something we want to allow in the future. + + * "git send-email" learned the alias file format used by the sendmail + program (in a simplified form; we obviously do not feed pipes). + + * Traditionally, external low-level 3-way merge drivers are expected + to produce their results based solely on the contents of the three + variants given in temporary files named by %O, %A and %B on their + command line. Additionally allow them to look at the final path + (given by %P). + + * "git blame" learned blame.showEmail configuration variable. + + * "git apply" cannot diagnose a patch corruption when the breakage is + to mark the length of the hunk shorter than it really is on the + hunk header line "@@ -l,k +m,n @@"; one special case it could is + when the hunk becomes no-op (e.g. k == n == 2 for two-line context + patch output), and it learned to do so in this special case. + + * Add the "--allow-unknown-type" option to "cat-file" to allow + inspecting loose objects of an experimental or a broken type. + + * Many long-running operations show progress eye-candy, even when + they are later backgrounded. Hide the eye-candy when the process + is sent to the background instead. + (merge a4fb76c lm/squelch-bg-progress later to maint). + + +Performance, Internal Implementation, Development Support etc. + + * "unsigned char [20]" used throughout the code to represent object + names are being converted into a semi-opaque "struct object_id". + This effort is expected to interfere with other topics in flight, + but hopefully will give us one extra level of abstraction in the + end, when completed. + + * for_each_ref() callback functions were taught to name the objects + not with "unsigned char sha1[20]" but with "struct object_id". + + * Catch a programmer mistake to feed a pointer not an array to + ARRAY_SIZE() macro, by using a couple of GCC extensions. + + * Some error messages in "git config" were emitted without calling + the usual error() facility. + + * When "add--interactive" splits a hunk into two overlapping hunks + and then let the user choose only one, it sometimes feeds an + incorrect patch text to "git apply". Add tests to demonstrate + this. + + I have a slight suspicion that this may be $gmane/87202 coming back + and biting us (I seem to have said "let's run with this and see + what happens" back then). + + * More line-ending tests. + + * An earlier rewrite to use strbuf_getwholeline() instead of fgets(3) + to read packed-refs file revealed that the former is unacceptably + inefficient. It has been optimized by using getdelim(3) when + available. + + * The refs API uses ref_lock struct which had its own "int fd", even + though the same file descriptor was in the lock struct it contains. + Clean-up the code to lose this redundant field. + + * There was a dead code that used to handle "git pull --tags" and + show special-cased error message, which was made irrelevant when + the semantics of the option changed back in Git 1.9 days. + (merge 19d122b pt/pull-tags-error-diag later to maint). + + * Help us to find broken test script that splits the body part of the + test by mistaken use of wrong kind of quotes. + (merge d93d5d5 jc/test-prereq-validate later to maint). + + * Developer support to automatically detect broken &&-chain in the + test scripts is now turned on by default. + (merge 92b269f jk/test-chain-lint later to maint). + + * Error reporting mechanism used in "refs" API has been made more + consistent. + + * "git pull" has more test coverage now. + + * "git pull" has become more aware of the options meant for + underlying "git fetch" and then learned to use parse-options + parser. + + * Clarify in the Makefile a guideline to decide use of USE_NSEC. + +Also contains various documentation updates and code clean-ups. + + +Fixes since v2.4 +---------------- + +Unless otherwise noted, all the fixes since v2.4 in the maintenance +track are contained in this release (see the maintenance releases' +notes for details). + + * Git 2.4 broke setting verbosity and progress levels on "git clone" + with native transports. + (merge 822f0c4 mh/clone-verbosity-fix later to maint). + + * "git add -e" did not allow the user to abort the operation by + killing the editor. + (merge cb64800 jk/add-e-kill-editor later to maint). + + * Memory usage of "git index-pack" has been trimmed by tens of + per-cent. + (merge f0e7f11 nd/slim-index-pack-memory-usage later to maint). + + * "git rev-list --objects $old --not --all" to see if everything that + is reachable from $old is already connected to the existing refs + was very inefficient. + (merge b6e8a3b jk/still-interesting later to maint). + + * "hash-object --literally" introduced in v2.2 was not prepared to + take a really long object type name. + (merge 1427a7f jc/hash-object later to maint). + + * "git rebase --quiet" was not quite quiet when there is nothing to + do. + (merge 22946a9 jk/rebase-quiet-noop later to maint). + + * The completion for "log --decorate=" parameter value was incorrect. + (merge af16bda sg/complete-decorate-full-not-long later to maint). + + * "filter-branch" corrupted commit log message that ends with an + incomplete line on platforms with some "sed" implementations that + munge such a line. Work it around by avoiding to use "sed". + (merge df06201 jk/filter-branch-use-of-sed-on-incomplete-line later to maint). + + * "git daemon" fails to build from the source under NO_IPV6 + configuration (regression in 2.4). + (merge d358f77 jc/daemon-no-ipv6-for-2.4.1 later to maint). + + * Some time ago, "git blame" (incorrectly) lost the convert_to_git() + call when synthesizing a fake "tip" commit that represents the + state in the working tree, which broke folks who record the history + with LF line ending to make their project portable across platforms + while terminating lines in their working tree files with CRLF for + their platform. + (merge 4bf256d tb/blame-resurrect-convert-to-git later to maint). + + * We avoid setting core.worktree when the repository location is the + ".git" directory directly at the top level of the working tree, but + the code misdetected the case in which the working tree is at the + root level of the filesystem (which arguably is a silly thing to + do, but still valid). + (merge 84ccad8 jk/init-core-worktree-at-root later to maint). + + * "git commit --date=now" or anything that relies on approxidate lost + the daylight-saving-time offset. + (merge f6e6362 jc/epochtime-wo-tz later to maint). + + * Access to objects in repositories that borrow from another one on a + slow NFS server unnecessarily got more expensive due to recent code + becoming more cautious in a naive way not to lose objects to pruning. + (merge ee1c6c3 jk/prune-mtime later to maint). + + * The codepaths that read .gitignore and .gitattributes files have been + taught that these files encoded in UTF-8 may have UTF-8 BOM marker at + the beginning; this makes it in line with what we do for configuration + files already. + (merge 27547e5 cn/bom-in-gitignore later to maint). + + * a few helper scripts in the test suite did not report errors + correctly. + (merge de248e9 ep/fix-test-lib-functions-report later to maint). + + * The default $HOME/.gitconfig file created upon "git config --global" + that edits it had incorrectly spelled user.name and user.email + entries in it. + (merge 7e11052 oh/fix-config-default-user-name-section later to maint). + + * "git cat-file bl $blob" failed to barf even though there is no + object type that is "bl". + (merge b7994af jk/type-from-string-gently later to maint). + + * The usual "git diff" when seeing a file turning into a directory + showed a patchset to remove the file and create all files in the + directory, but "git diff --no-index" simply refused to work. Also, + when asked to compare a file and a directory, imitate POSIX "diff" + and compare the file with the file with the same name in the + directory, instead of refusing to run. + (merge 0615173 jc/diff-no-index-d-f later to maint). + + * "git rebase -i" moved the "current" command from "todo" to "done" a + bit too prematurely, losing a step when a "pick" did not even start. + (merge 8cbc57c ph/rebase-i-redo later to maint). + + * The connection initiation code for "ssh" transport tried to absorb + differences between the stock "ssh" and Putty-supplied "plink" and + its derivatives, but the logic to tell that we are using "plink" + variants were too loose and falsely triggered when "plink" appeared + anywhere in the path (e.g. "/home/me/bin/uplink/ssh"). + (merge baaf233 bc/connect-plink later to maint). + + * We have prepended $GIT_EXEC_PATH and the path "git" is installed in + (typically "/usr/bin") to $PATH when invoking subprograms and hooks + for almost eternity, but the original use case the latter tried to + support was semi-bogus (i.e. install git to /opt/foo/git and run it + without having /opt/foo on $PATH), and more importantly it has + become less and less relevant as Git grew more mainstream (i.e. the + users would _want_ to have it on their $PATH). Stop prepending the + path in which "git" is installed to users' $PATH, as that would + interfere the command search order people depend on (e.g. they may + not like versions of programs that are unrelated to Git in /usr/bin + and want to override them by having different ones in /usr/local/bin + and have the latter directory earlier in their $PATH). + (merge a0b4507 jk/git-no-more-argv0-path-munging later to maint). + + * core.excludesfile (defaulting to $XDG_HOME/git/ignore) is supposed + to be overridden by repository-specific .git/info/exclude file, but + the order was swapped from the beginning. This belatedly fixes it. + (merge 099d2d8 jc/gitignore-precedence later to maint). + + * There was a commented-out (instead of being marked to expect + failure) test that documented a breakage that was fixed since the + test was written; turn it into a proper test. + (merge 66d2e04 sb/t1020-cleanup later to maint). + + * The "log --decorate" enhancement in Git 2.4 that shows the commit + at the tip of the current branch e.g. "HEAD -> master", did not + work with --decorate=full. + (merge 429ad20 mg/log-decorate-HEAD later to maint). + + * The ref API did not handle cases where 'refs/heads/xyzzy/frotz' is + removed at the same time as 'refs/heads/xyzzy' is added (or vice + versa) very well. + (merge c628edf mh/ref-directory-file later to maint). + + * Multi-ref transaction support we merged a few releases ago + unnecessarily kept many file descriptors open, risking to fail with + resource exhaustion. This is for 2.4.x track. + (merge 185ce3a mh/write-refs-sooner-2.4 later to maint). + + * "git bundle verify" did not diagnose extra parameters on the + command line. + (merge 7886cfa ps/bundle-verify-arg later to maint). + + * Various documentation mark-up fixes to make the output more + consistent in general and also make AsciiDoctor (an alternative + formatter) happier. + (merge d0258b9 jk/asciidoc-markup-fix later to maint). + (merge ad3967a jk/stripspace-asciidoctor-fix later to maint). + (merge 975e382 ja/tutorial-asciidoctor-fix later to maint). + + * The code to read pack-bitmap wanted to allocate a few hundred + pointers to a structure, but by mistake allocated and leaked memory + enough to hold that many actual structures. Correct the allocation + size and also have it on stack, as it is small enough. + (merge 599dc76 rs/plug-leak-in-pack-bitmaps later to maint). + + * The pull.ff configuration was supposed to override the merge.ff + configuration, but it didn't. + (merge db9bb28 pt/pull-ff-vs-merge-ff later to maint). + + * "git pull --log" and "git pull --no-log" worked as expected, but + "git pull --log=20" did not. + (merge 5061a44 pt/pull-log-n later to maint). + + * "git rerere forget" in a repository without rerere enabled gave a + cryptic error message; it should be a silent no-op instead. + (merge 0544574 jk/rerere-forget-check-enabled later to maint). + + * "git rebase -i" fired post-rewrite hook when it shouldn't (namely, + when it was told to stop sequencing with 'exec' insn). + (merge 141ff8f mm/rebase-i-post-rewrite-exec later to maint). + + * Clarify that "log --raw" and "log --format=raw" are unrelated + concepts. + (merge 92de921 mm/log-format-raw-doc later to maint). + + * Make "git stash something --help" error out, so that users can + safely say "git stash drop --help". + (merge 5ba2831 jk/stash-options later to maint). + + * The clean/smudge interface did not work well when filtering an + empty contents (failed and then passed the empty input through). + It can be argued that a filter that produces anything but empty for + an empty input is nonsense, but if the user wants to do strange + things, then why not? + (merge f6a1e1e jh/filter-empty-contents later to maint). + + * Communication between the HTTP server and http_backend process can + lead to a dead-lock when relaying a large ref negotiation request. + Diagnose the situation better, and mitigate it by reading such a + request first into core (to a reasonable limit). + (merge 636614f jk/http-backend-deadlock later to maint). + + * "git clean pathspec..." tried to lstat(2) and complain even for + paths outside the given pathspec. + (merge 838d6a9 dt/clean-pathspec-filter-then-lstat later to maint). + + * Recent "git prune" traverses young unreachable objects to safekeep + old objects in the reachability chain from them, which sometimes + caused error messages that are unnecessarily alarming. + (merge ce4e7b2 jk/squelch-missing-link-warning-for-unreachable later to maint). + + * The configuration reader/writer uses mmap(2) interface to access + the files; when we find a directory, it barfed with "Out of memory?". + (merge 9ca0aaf jk/diagnose-config-mmap-failure later to maint). + + * "color.diff.plain" was a misnomer; give it 'color.diff.context' as + a more logical synonym. + (merge 8dbf3eb jk/color-diff-plain-is-context later to maint). + + * The setup code used to die when core.bare and core.worktree are set + inconsistently, even for commands that do not need working tree. + (merge fada767 jk/die-on-bogus-worktree-late later to maint). + + * Recent Mac OS X updates breaks the logic to detect that the machine + is on the AC power in the sample pre-auto-gc script. + (merge c54c7b3 pa/auto-gc-mac-osx later to maint). + + * "git commit --cleanup=scissors" was not careful enough to protect + against getting fooled by a line that looked like scissors. + (merge fbfa097 sg/commit-cleanup-scissors later to maint). + + * "Have we lost a race with competing repack?" check was too + expensive, especially while receiving a huge object transfer + that runs index-pack (e.g. "clone" or "fetch"). + (merge 0eeb077 jk/index-pack-reduce-recheck later to maint). + + * The tcsh completion writes a bash scriptlet but that would have + failed for users with noclobber set. + (merge 0b1f688 af/tcsh-completion-noclobber later to maint). + + * "git for-each-ref" reported "missing object" for 0{40} when it + encounters a broken ref. The lack of object whose name is 0{40} is + not the problem; the ref being broken is. + (merge 501cf47 mh/reporting-broken-refs-from-for-each-ref later to maint). + + * Various fixes around "git am" that applies a patch to a history + that is not there yet. + (merge 6ea3b67 pt/am-abort-fix later to maint). + + * "git fsck" used to ignore missing or invalid objects recorded in reflog. + (merge 19bf6c9 mh/fsck-reflog-entries later to maint). + + * "git format-patch --ignore-if-upstream A..B" did not like to be fed + tags as boundary commits. + (merge 9b7a61d jc/do-not-feed-tags-to-clear-commit-marks later to maint). + + * "git fetch --depth=<depth>" and "git clone --depth=<depth>" issued + a shallow transfer request even to an upload-pack that does not + support the capability. + (merge eb86a50 me/fetch-into-shallow-safety later to maint). + + * "git rebase" did not exit with failure when format-patch it invoked + failed for whatever reason. + (merge 60d708b cb/rebase-am-exit-code later to maint). + + * Fix a small bug in our use of umask() return value. + (merge 3096b2e jk/fix-refresh-utime later to maint). + + * An ancient test framework enhancement to allow color was not + entirely correct; this makes it work even when tput needs to read + from the ~/.terminfo under the user's real HOME directory. + (merge d5c1b7c rh/test-color-avoid-terminfo-in-original-home later to maint). + + * A minor bugfix when pack bitmap is used with "rev-list --count". + (merge c8a70d3 jk/rev-list-no-bitmap-while-pruning later to maint). + + * "git config" failed to update the configuration file when the + underlying filesystem is incapable of renaming a file that is still + open. + (merge 7a64592 kb/config-unmap-before-renaming later to maint). + + * Avoid possible ssize_t to int truncation. + (merge 6c8afe4 mh/strbuf-read-file-returns-ssize-t later to maint). + + * When you say "!<ENTER>" while running say "git log", you'd confuse + yourself in the resulting shell, that may look as if you took + control back to the original shell you spawned "git log" from but + that isn't what is happening. To that new shell, we leaked + GIT_PAGER_IN_USE environment variable that was meant as a local + communication between the original "Git" and subprocesses that was + spawned by it after we launched the pager, which caused many + "interesting" things to happen, e.g. "git diff | cat" still paints + its output in color by default. + + Stop leaking that environment variable to the pager's half of the + fork; we only need it on "Git" side when we spawn the pager. + (merge 124b519 jc/unexport-git-pager-in-use-in-pager later to maint). + + * Abandoning an already applied change in "git rebase -i" with + "--continue" left CHERRY_PICK_HEAD and confused later steps. + (merge 0e0aff4 js/rebase-i-clean-up-upon-continue-to-skip later to maint). + + * We used to ask libCURL to use the most secure authentication method + available when talking to an HTTP proxy only when we were told to + talk to one via configuration variables. We now ask libCURL to + always use the most secure authentication method, because the user + can tell libCURL to use an HTTP proxy via an environment variable + without using configuration variables. + (merge 5841520 et/http-proxyauth later to maint). + + * A fix to a minor regression to "git fsck" in v2.2 era that started + complaining about a body-less tag object when it lacks a separator + empty line after its header to separate it with a non-existent body. + (merge 84d18c0 jc/fsck-retire-require-eoh later to maint). + + * Code cleanups and documentation updates. + (merge 0269f96 mm/usage-log-l-can-take-regex later to maint). + (merge 64f2589 nd/t1509-chroot-test later to maint). + (merge d201a1e sb/test-bitmap-free-at-end later to maint). + (merge 05bfc7d sb/line-log-plug-pairdiff-leak later to maint). + (merge 846e5df pt/xdg-config-path later to maint). + (merge 1154aa4 jc/plug-fmt-merge-msg-leak later to maint). + (merge 319b678 jk/sha1-file-reduce-useless-warnings later to maint). + (merge 9a35c14 fg/document-commit-message-stripping later to maint). + (merge bbf431c ps/doc-packfile-vs-pack-file later to maint). + (merge 309a9e3 jk/skip-http-tests-under-no-curl later to maint). + (merge ccd593c dl/branch-error-message later to maint). + (merge 22570b6 rs/janitorial later to maint). + (merge 5c2a581 mc/commit-doc-grammofix later to maint). + (merge ce41720 ah/usage-strings later to maint). + (merge e6a268c sb/glossary-submodule later to maint). + (merge ec48a76 sb/submodule-doc-intro later to maint). + (merge 14f8b9b jk/clone-dissociate later to maint). + (merge 055c7e9 sb/pack-protocol-mention-smart-http later to maint). + (merge 7c37a5d jk/make-fix-dependencies later to maint). + (merge fc0aa39 sg/merge-summary-config later to maint). + (merge 329af6c pt/t0302-needs-sanity later to maint). + (merge d614f07 fk/doc-format-patch-vn later to maint). + (merge 72dbb36 sg/completion-commit-cleanup later to maint). + (merge e654eb2 es/utf8-stupid-compiler-workaround later to maint). + (merge 34b935c es/osx-header-pollutes-mask-macro later to maint). + (merge ab7fade jc/prompt-document-ps1-state-separator later to maint). + (merge 25f600e mm/describe-doc later to maint). + (merge 83fe167 mm/branch-doc-updates later to maint). + (merge 75d2e5a ls/hint-rev-list-count later to maint). + (merge edc8f71 cb/subtree-tests-update later to maint). + (merge 5330e6e sb/p5310-and-chain later to maint). + (merge c4ac525 tb/checkout-doc later to maint). + (merge e479c5f jk/pretty-encoding-doc later to maint). + (merge 7e837c6 ss/clone-guess-dir-name-simplify later to maint). diff --git a/Documentation/RelNotes/2.5.1.txt b/Documentation/RelNotes/2.5.1.txt new file mode 100644 index 0000000..b705533 --- /dev/null +++ b/Documentation/RelNotes/2.5.1.txt @@ -0,0 +1,65 @@ +Git v2.5.1 Release Notes +======================== + +Fixes since v2.5 +---------------- + + * Running an aliased command from a subdirectory when the .git thing + in the working tree is a gitfile pointing elsewhere did not work. + + * Often a fast-import stream builds a new commit on top of the + previous commit it built, and it often unconditionally emits a + "from" command to specify the first parent, which can be omitted in + such a case. This caused fast-import to forget the tree of the + previous commit and then re-read it from scratch, which was + inefficient. Optimize for this common case. + + * The "rev-parse --parseopt" mode parsed the option specification + and the argument hint in a strange way to allow '=' and other + special characters in the option name while forbidding them from + the argument hint. This made it impossible to define an option + like "--pair <key>=<value>" with "pair=key=value" specification, + which instead would have defined a "--pair=key <value>" option. + + * A "rebase" replays changes of the local branch on top of something + else, as such they are placed in stage #3 and referred to as + "theirs", while the changes in the new base, typically a foreign + work, are placed in stage #2 and referred to as "ours". Clarify + the "checkout --ours/--theirs". + + * An experimental "untracked cache" feature used uname(2) in a + slightly unportable way. + + * "sparse checkout" misbehaved for a path that is excluded from the + checkout when switching between branches that differ at the path. + + * The low-level "git send-pack" did not honor 'user.signingkey' + configuration variable when sending a signed-push. + + * An attempt to delete a ref by pushing into a repository whose HEAD + symbolic reference points at an unborn branch that cannot be + created due to ref D/F conflict (e.g. refs/heads/a/b exists, HEAD + points at refs/heads/a) failed. + + * "git subtree" (in contrib/) depended on "git log" output to be + stable, which was a no-no. Apply a workaround to force a + particular date format. + + * "git clone $URL" in recent releases of Git contains a regression in + the code that invents a new repository name incorrectly based on + the $URL. This has been corrected. + (merge db2e220 jk/guess-repo-name-regression-fix later to maint). + + * Running tests with the "-x" option to make them verbose had some + unpleasant interactions with other features of the test suite. + (merge 9b5fe78 jk/test-with-x later to maint). + + * "git pull" in recent releases of Git has a regression in the code + that allows custom path to the --upload-pack=<program>. This has + been corrected. + + * pipe() emulation used in Git for Windows looked at a wrong variable + when checking for an error from an _open_osfhandle() call. + +Also contains typofixes, documentation updates and trivial code +clean-ups. diff --git a/Documentation/RelNotes/2.5.2.txt b/Documentation/RelNotes/2.5.2.txt new file mode 100644 index 0000000..3f74939 --- /dev/null +++ b/Documentation/RelNotes/2.5.2.txt @@ -0,0 +1,63 @@ +Git v2.5.2 Release Notes +======================== + +Fixes since v2.5.1 +------------------ + + * "git init empty && git -C empty log" said "bad default revision 'HEAD'", + which was found to be a bit confusing to new users. + + * The "interpret-trailers" helper mistook a multi-paragraph title of + a commit log message with a colon in it as the end of the trailer + block. + + * When re-priming the cache-tree opportunistically while committing + the in-core index as-is, we mistakenly invalidated the in-core + index too aggressively, causing the experimental split-index code + to unnecessarily rewrite the on-disk index file(s). + + * "git archive" did not use zip64 extension when creating an archive + with more than 64k entries, which nobody should need, right ;-)? + + * The code in "multiple-worktree" support that attempted to recover + from an inconsistent state updated an incorrect file. + + * "git rev-list" does not take "--notes" option, but did not complain + when one is given. + + * Because the configuration system does not allow "alias.0foo" and + "pager.0foo" as the configuration key, the user cannot use '0foo' + as a custom command name anyway, but "git 0foo" tried to look these + keys up and emitted useless warnings before saying '0foo is not a + git command'. These warning messages have been squelched. + + * We recently rewrote one of the build scripts in Perl, which made it + necessary to have Perl to build Git. Reduced Perl dependency by + rewriting it again using sed. + + * t1509 test that requires a dedicated VM environment had some + bitrot, which has been corrected. + + * strbuf_read() used to have one extra iteration (and an unnecessary + strbuf_grow() of 8kB), which was eliminated. + + * The codepath to produce error messages had a hard-coded limit to + the size of the message, primarily to avoid memory allocation while + calling die(). + + * When trying to see that an object does not exist, a state errno + leaked from our "first try to open a packfile with O_NOATIME and + then if it fails retry without it" logic on a system that refuses + O_NOATIME. This confused us and caused us to die, saying that the + packfile is unreadable, when we should have just reported that the + object does not exist in that packfile to the caller. + + * An off-by-one error made "git remote" to mishandle a remote with a + single letter nickname. + + * A handful of codepaths that used to use fixed-sized arrays to hold + pathnames have been corrected to use strbuf and other mechanisms to + allow longer pathnames without fearing overflows. + +Also contains typofixes, documentation updates and trivial code +clean-ups. diff --git a/Documentation/RelNotes/2.5.3.txt b/Documentation/RelNotes/2.5.3.txt new file mode 100644 index 0000000..d143685 --- /dev/null +++ b/Documentation/RelNotes/2.5.3.txt @@ -0,0 +1,17 @@ +Git v2.5.3 Release Notes +======================== + +Fixes since v2.5.2 +------------------ + + * The experimental untracked-cache feature were buggy when paths with + a few levels of subdirectories are involved. + + * Recent versions of scripted "git am" has a performance regression + in "git am --skip" codepath, which no longer exists in the + built-in version on the 'master' front. Fix the regression in + the last scripted version that appear in 2.5.x maintenance track + and older. + +Also contains typofixes, documentation updates and trivial code +clean-ups. diff --git a/Documentation/RelNotes/2.5.4.txt b/Documentation/RelNotes/2.5.4.txt new file mode 100644 index 0000000..a5e8477 --- /dev/null +++ b/Documentation/RelNotes/2.5.4.txt @@ -0,0 +1,18 @@ +Git v2.5.4 Release Notes +======================== + +Fixes since v2.5.4 +------------------ + + * xdiff code we use to generate diffs is not prepared to handle + extremely large files. It uses "int" in many places, which can + overflow if we have a very large number of lines or even bytes in + our input files, for example. Cap the input size to soemwhere + around 1GB for now. + + * Some protocols (like git-remote-ext) can execute arbitrary code + found in the URL. The URLs that submodules use may come from + arbitrary sources (e.g., .gitmodules files in a remote + repository), and can hurt those who blindly enable recursive + fetch. Restrict the allowed protocols to well known and safe + ones. diff --git a/Documentation/RelNotes/2.5.5.txt b/Documentation/RelNotes/2.5.5.txt new file mode 100644 index 0000000..37eae9a --- /dev/null +++ b/Documentation/RelNotes/2.5.5.txt @@ -0,0 +1,11 @@ +Git v2.5.5 Release Notes +======================== + +Fixes since v2.5.4 +------------------ + + * Bugfix patches were backported from the 'master' front to plug heap + corruption holes, to catch integer overflow in the computation of + pathname lengths, and to get rid of the name_path API. Both of + these would have resulted in writing over an under-allocated buffer + when formulating pathnames while tree traversal. diff --git a/Documentation/RelNotes/2.6.0.txt b/Documentation/RelNotes/2.6.0.txt new file mode 100644 index 0000000..7288aaf --- /dev/null +++ b/Documentation/RelNotes/2.6.0.txt @@ -0,0 +1,370 @@ +Git 2.6 Release Notes +===================== + +Updates since v2.5 +------------------ + +UI, Workflows & Features + + * An asterisk as a substring (as opposed to the entirety) of a path + component for both side of a refspec, e.g. + "refs/heads/o*:refs/remotes/heads/i*", is now allowed. + + * New userdiff pattern definition for fountain screenwriting markup + format has been added. + + * "git log" and friends learned a new "--date=format:..." option to + format timestamps using system's strftime(3). + + * "git fast-import" learned to respond to the get-mark command via + its cat-blob-fd interface. + + * "git rebase -i" learned "drop commit-object-name subject" command + as another way to skip replaying of a commit. + + * A new configuration variable can enable "--follow" automatically + when "git log" is run with one pathspec argument. + + * "git status" learned to show a more detailed information regarding + the "rebase -i" session in progress. + + * "git cat-file" learned "--batch-all-objects" option to enumerate all + available objects in the repository more quickly than "rev-list + --all --objects" (the output includes unreachable objects, though). + + * "git fsck" learned to ignore errors on a set of known-to-be-bad + objects, and also allows the warning levels of various kinds of + non-critical breakages to be tweaked. + + * "git rebase -i"'s list of todo is made configurable. + + * "git send-email" now performs alias-expansion on names that are + given via --cccmd, etc. + + * An environment variable GIT_REPLACE_REF_BASE tells Git to look into + refs hierarchy other than refs/replace/ for the object replacement + data. + + * Allow untracked cache (experimental) to be used when sparse + checkout (experimental) is also in use. + + * "git pull --rebase" has been taught to pay attention to + rebase.autostash configuration. + + * The command-line completion script (in contrib/) has been updated. + + * A negative !ref entry in multi-value transfer.hideRefs + configuration can be used to say "don't hide this one". + + * After "git am" without "-3" stops, running "git am -3" pays attention + to "-3" only for the patch that caused the original invocation + to stop. + + * When linked worktree is used, simultaneous "notes merge" instances + for the same ref in refs/notes/* are prevented from stomping on + each other. + + * "git send-email" learned a new option --smtp-auth to limit the SMTP + AUTH mechanisms to be used to a subset of what the system library + supports. + + * A new configuration variable http.sslVersion can be used to specify + what specific version of SSL/TLS to use to make a connection. + + * "git notes merge" can be told with "--strategy=<how>" option how to + automatically handle conflicts; this can now be configured by + setting notes.mergeStrategy configuration variable. + + * "git log --cc" did not show any patch, even though most of the time + the user meant "git log --cc -p -m" to see patch output for commits + with a single parent, and combined diff for merge commits. The + command is taught to DWIM "--cc" (without "--raw" and other forms + of output specification) to "--cc -p -m". + + * "git config --list" output was hard to parse when values consist of + multiple lines. "--name-only" option is added to help this. + + * A handful of usability & cosmetic fixes to gitk and l10n updates. + + * A completely empty e-mail address <> is now allowed in the authors + file used by git-svn, to match the way it accepts the output from + authors-prog. + + +Performance, Internal Implementation, Development Support etc. + + * In preparation for allowing different "backends" to store the refs + in a way different from the traditional "one ref per file in + $GIT_DIR or in a $GIT_DIR/packed-refs file" filesystem storage, + direct filesystem access to ref-like things like CHERRY_PICK_HEAD + from scripts and programs has been reduced. + + * Computation of untracked status indicator by bash prompt + script (in contrib/) has been optimized. + + * Memory use reduction when commit-slab facility is used to annotate + sparsely (which is not recommended in the first place). + + * Clean up refs API and make "git clone" less intimate with the + implementation detail. + + * "git pull" was reimplemented in C. + + * The packet tracing machinery allows to capture an incoming pack + data to a file for debugging. + + * Move machinery to parse human-readable scaled numbers like 1k, 4M, + and 2G as an option parameter's value from pack-objects to + parse-options API, to make it available to other codepaths. + + * "git verify-tag" and "git verify-commit" have been taught to share + more code, and then learned to optionally show the verification + message from the underlying GPG implementation. + + * Various enhancements around "git am" reading patches generated by + foreign SCM have been made. + + * Ref listing by "git branch -l" and "git tag -l" commands has + started to be rebuilt, based on the for-each-ref machinery. + + * The code to perform multi-tree merges has been taught to repopulate + the cache-tree upon a successful merge into the index, so that + subsequent "diff-index --cached" (hence "status") and "write-tree" + (hence "commit") will go faster. + + The same logic in "git checkout" may now be removed, but that is a + separate issue. + + * Tests that assume how reflogs are represented on the filesystem too + much have been corrected. + + * "git am" has been rewritten in "C". + + * git_path() and mkpath() are handy helper functions but it is easy + to misuse, as the callers need to be careful to keep the number of + active results below 4. Their uses have been reduced. + + * The "lockfile" API has been rebuilt on top of a new "tempfile" API. + + * To prepare for allowing a different "ref" backend to be plugged in + to the system, update_ref()/delete_ref() have been taught about + ref-like things like MERGE_HEAD that are per-worktree (they will + always be written to the filesystem inside $GIT_DIR). + + * The gitmodules API that is accessed from the C code learned to + cache stuff lazily. + + +Also contains various documentation updates and code clean-ups. + + +Fixes since v2.5 +---------------- + +Unless otherwise noted, all the fixes since v2.5 in the maintenance +track are contained in this release (see the maintenance releases' +notes for details). + + * "git subtree" (in contrib/) depended on "git log" output to be + stable, which was a no-no. Apply a workaround to force a + particular date format. + (merge e7aac44 da/subtree-date-confusion later to maint). + + * An attempt to delete a ref by pushing into a repository whose HEAD + symbolic reference points at an unborn branch that cannot be + created due to ref D/F conflict (e.g. refs/heads/a/b exists, HEAD + points at refs/heads/a) failed. + (merge b112b14 jx/do-not-crash-receive-pack-wo-head later to maint). + + * The low-level "git send-pack" did not honor 'user.signingkey' + configuration variable when sending a signed-push. + (merge d830d39 db/send-pack-user-signingkey later to maint). + + * "sparse checkout" misbehaved for a path that is excluded from the + checkout when switching between branches that differ at the path. + (merge 7d78241 as/sparse-checkout-removal later to maint). + + * An experimental "untracked cache" feature used uname(2) in a + slightly unportable way. + (merge 100e433 cb/uname-in-untracked later to maint). + + * A "rebase" replays changes of the local branch on top of something + else, as such they are placed in stage #3 and referred to as + "theirs", while the changes in the new base, typically a foreign + work, are placed in stage #2 and referred to as "ours". Clarify + the "checkout --ours/--theirs". + (merge f303016 se/doc-checkout-ours-theirs later to maint). + + * The "rev-parse --parseopt" mode parsed the option specification + and the argument hint in a strange way to allow '=' and other + special characters in the option name while forbidding them from + the argument hint. This made it impossible to define an option + like "--pair <key>=<value>" with "pair=key=value" specification, + which instead would have defined a "--pair=key <value>" option. + (merge 2d893df ib/scripted-parse-opt-better-hint-string later to maint). + + * Often a fast-import stream builds a new commit on top of the + previous commit it built, and it often unconditionally emits a + "from" command to specify the first parent, which can be omitted in + such a case. This caused fast-import to forget the tree of the + previous commit and then re-read it from scratch, which was + inefficient. Optimize for this common case. + (merge 0df3245 mh/fast-import-optimize-current-from later to maint). + + * Running an aliased command from a subdirectory when the .git thing + in the working tree is a gitfile pointing elsewhere did not work. + (merge d95138e nd/export-worktree later to maint). + + * "Is this subdirectory a separate repository that should not be + touched?" check "git clean" was inefficient. This was replaced + with a more optimized check. + (merge fbf2fec ee/clean-remove-dirs later to maint). + + * The "new-worktree-mode" hack in "checkout" that was added in + nd/multiple-work-trees topic has been removed by updating the + implementation of new "worktree add". + (merge 65f9b75 es/worktree-add-cleanup later to maint). + + * Remove remaining cruft from "git checkout --to", which + transitioned to "git worktree add". + (merge 114ff88 es/worktree-add later to maint). + + * An off-by-one error made "git remote" to mishandle a remote with a + single letter nickname. + (merge bc598c3 mh/get-remote-group-fix later to maint). + + * "git clone $URL", when cloning from a site whose sole purpose is to + host a single repository (hence, no path after <scheme>://<site>/), + tried to use the site name as the new repository name, but did not + remove username or password when <site> part was of the form + <user>@<pass>:<host>. The code is taught to redact these. + (merge adef956 ps/guess-repo-name-at-root later to maint). + + * Running tests with the "-x" option to make them verbose had some + unpleasant interactions with other features of the test suite. + (merge 9b5fe78 jk/test-with-x later to maint). + + * t1509 test that requires a dedicated VM environment had some + bitrot, which has been corrected. + (merge faacc5a ps/t1509-chroot-test-fixup later to maint). + + * "git pull" in recent releases of Git has a regression in the code + that allows custom path to the --upload-pack=<program>. This has + been corrected. + + Note that this is irrelevant for 'master' with "git pull" rewritten + in C. + (merge 13e0e28 mm/pull-upload-pack later to maint). + + * When trying to see that an object does not exist, a state errno + leaked from our "first try to open a packfile with O_NOATIME and + then if it fails retry without it" logic on a system that refuses + O_NOATIME. This confused us and caused us to die, saying that the + packfile is unreadable, when we should have just reported that the + object does not exist in that packfile to the caller. + (merge dff6f28 cb/open-noatime-clear-errno later to maint). + + * The codepath to produce error messages had a hard-coded limit to + the size of the message, primarily to avoid memory allocation while + calling die(). + (merge f4c3edc jk/long-error-messages later to maint). + + * strbuf_read() used to have one extra iteration (and an unnecessary + strbuf_grow() of 8kB), which was eliminated. + (merge 3ebbd00 jh/strbuf-read-use-read-in-full later to maint). + + * We rewrote one of the build scripts in Perl but this reimplements + in Bourne shell. + (merge 57cee8a sg/help-group later to maint). + + * The experimental untracked-cache feature were buggy when paths with + a few levels of subdirectories are involved. + (merge 73f9145 dt/untracked-subdir later to maint). + + * "interpret-trailers" helper mistook a single-liner log message that + has a colon as the end of existing trailer. + + * The "interpret-trailers" helper mistook a multi-paragraph title of + a commit log message with a colon in it as the end of the trailer + block. + (merge 5c99995 cc/trailers-corner-case-fix later to maint). + + * "git describe" without argument defaulted to describe the HEAD + commit, but "git describe --contains" didn't. Arguably, in a + repository used for active development, such defaulting would not + be very useful as the tip of branch is typically not tagged, but it + is better to be consistent. + (merge 2bd0706 sg/describe-contains later to maint). + + * The client side codepaths in "git push" have been cleaned up + and the user can request to perform an optional "signed push", + i.e. sign only when the other end accepts signed push. + (merge 68c757f db/push-sign-if-asked later to maint). + + * Because the configuration system does not allow "alias.0foo" and + "pager.0foo" as the configuration key, the user cannot use '0foo' + as a custom command name anyway, but "git 0foo" tried to look these + keys up and emitted useless warnings before saying '0foo is not a + git command'. These warning messages have been squelched. + (merge 9e9de18 jk/fix-alias-pager-config-key-warnings later to maint). + + * "git rev-list" does not take "--notes" option, but did not complain + when one is given. + (merge 2aea7a5 jk/rev-list-has-no-notes later to maint). + + * When re-priming the cache-tree opportunistically while committing + the in-core index as-is, we mistakenly invalidated the in-core + index too aggressively, causing the experimental split-index code + to unnecessarily rewrite the on-disk index file(s). + (merge 475a344 dt/commit-preserve-base-index-upon-opportunistic-cache-tree-update later to maint). + + * "git archive" did not use zip64 extension when creating an archive + with more than 64k entries, which nobody should need, right ;-)? + (merge 88329ca rs/archive-zip-many later to maint). + + * The code in "multiple-worktree" support that attempted to recover + from an inconsistent state updated an incorrect file. + (merge 82fde87 nd/fixup-linked-gitdir later to maint). + + * On case insensitive systems, "git p4" did not work well with client + specs. + + * "git init empty && git -C empty log" said "bad default revision 'HEAD'", + which was found to be a bit confusing to new users. + (merge ce11360 jk/log-missing-default-HEAD later to maint). + + * Recent versions of scripted "git am" has a performance regression in + "git am --skip" codepath, which no longer exists in the built-in + version on the 'master' front. Fix the regression in the last + scripted version that appear in 2.5.x maintenance track and older. + (merge b9d6689 js/maint-am-skip-performance-regression later to maint). + + * The branch descriptions that are set with "git branch --edit-description" + option were used in many places but they weren't clearly documented. + (merge 561d2b7 po/doc-branch-desc later to maint). + + * Code cleanups and documentation updates. + (merge 1c601af es/doc-clean-outdated-tools later to maint). + (merge 3581304 kn/tag-doc-fix later to maint). + (merge 3a59e59 kb/i18n-doc later to maint). + (merge 45abdee sb/remove-unused-var-from-builtin-add later to maint). + (merge 14691e3 sb/parse-options-codeformat later to maint). + (merge 4a6ada3 ad/bisect-cleanup later to maint). + (merge da4c5ad ta/docfix-index-format-tech later to maint). + (merge ae25fd3 sb/check-return-from-read-ref later to maint). + (merge b3325df nd/dwim-wildcards-as-pathspecs later to maint). + (merge 7aa9b9b sg/wt-status-header-inclusion later to maint). + (merge f04c690 as/docfix-reflog-expire-unreachable later to maint). + (merge 1269847 sg/t3020-typofix later to maint). + (merge 8b54c23 jc/calloc-pathspec later to maint). + (merge a6926b8 po/po-readme later to maint). + (merge 54d160e ss/fix-config-fd-leak later to maint). + (merge b80fa84 ah/submodule-typofix-in-error later to maint). + (merge 99885bc ah/reflog-typofix-in-error later to maint). + (merge 9476c2c ah/read-tree-usage-string later to maint). + (merge b8c1d27 ah/pack-objects-usage-strings later to maint). + (merge 486e1e1 br/svn-doc-include-paths-config later to maint). + (merge 1733ed3 ee/clean-test-fixes later to maint). + (merge 5fcadc3 gb/apply-comment-typofix later to maint). + (merge b894d3e mp/t7060-diff-index-test later to maint). + (merge d238710 as/config-doc-markup-fix later to maint). diff --git a/Documentation/RelNotes/2.6.1.txt b/Documentation/RelNotes/2.6.1.txt new file mode 100644 index 0000000..1e51363 --- /dev/null +++ b/Documentation/RelNotes/2.6.1.txt @@ -0,0 +1,18 @@ +Git v2.6.1 Release Notes +======================== + +Fixes since v2.6 +---------------- + + * xdiff code we use to generate diffs is not prepared to handle + extremely large files. It uses "int" in many places, which can + overflow if we have a very large number of lines or even bytes in + our input files, for example. Cap the input size to soemwhere + around 1GB for now. + + * Some protocols (like git-remote-ext) can execute arbitrary code + found in the URL. The URLs that submodules use may come from + arbitrary sources (e.g., .gitmodules files in a remote + repository), and can hurt those who blindly enable recursive + fetch. Restrict the allowed protocols to well known and safe + ones. diff --git a/Documentation/RelNotes/2.6.2.txt b/Documentation/RelNotes/2.6.2.txt new file mode 100644 index 0000000..5b65e35 --- /dev/null +++ b/Documentation/RelNotes/2.6.2.txt @@ -0,0 +1,65 @@ +Git v2.6.2 Release Notes +======================== + +Fixes since v2.6.1 +------------------ + + * There were some classes of errors that "git fsck" diagnosed to its + standard error that did not cause it to exit with non-zero status. + + * A test script for the HTTP service had a timing dependent bug, + which was fixed. + + * Performance-measurement tests did not work without an installed Git. + + * On a case insensitive filesystems, setting GIT_WORK_TREE variable + using a random cases that does not agree with what the filesystem + thinks confused Git that it wasn't inside the working tree. + + * When "git am" was rewritten as a built-in, it stopped paying + attention to user.signingkey, which was fixed. + + * After "git checkout --detach", "git status" reported a fairly + useless "HEAD detached at HEAD", instead of saying at which exact + commit. + + * "git rebase -i" had a minor regression recently, which stopped + considering a line that begins with an indented '#' in its insn + sheet not a comment, which is now fixed. + + * Description of the "log.follow" configuration variable in "git log" + documentation is now also copied to "git config" documentation. + + * Allocation related functions and stdio are unsafe things to call + inside a signal handler, and indeed killing the pager can cause + glibc to deadlock waiting on allocation mutex as our signal handler + tries to free() some data structures in wait_for_pager(). Reduce + these unsafe calls. + + * The way how --ref/--notes to specify the notes tree reference are + DWIMmed was not clearly documented. + + * Customization to change the behaviour with "make -w" and "make -s" + in our Makefile was broken when they were used together. + + * The Makefile always runs the library archiver with hardcoded "crs" + options, which was inconvenient for exotic platforms on which + people want to use programs with totally different set of command + line options. + + * The ssh transport, just like any other transport over the network, + did not clear GIT_* environment variables, but it is possible to + use SendEnv and AcceptEnv to leak them to the remote invocation of + Git, which is not a good idea at all. Explicitly clear them just + like we do for the local transport. + + * "git blame --first-parent v1.0..v2.0" was not rejected but did not + limit the blame to commits on the first parent chain. + + * Very small number of options take a parameter that is optional + (which is not a great UI element as they can only appear at the end + of the command line). Add notice to documentation of each and + every one of them. + +Also contains typofixes, documentation updates and trivial code +clean-ups. diff --git a/Documentation/RelNotes/2.6.3.txt b/Documentation/RelNotes/2.6.3.txt new file mode 100644 index 0000000..fc6fe17 --- /dev/null +++ b/Documentation/RelNotes/2.6.3.txt @@ -0,0 +1,111 @@ +Git v2.6.3 Release Notes +======================== + +Fixes since v2.6.2 +------------------ + + * The error message from "git blame --contents --reverse" incorrectly + talked about "--contents --children". + + * "git merge-file" tried to signal how many conflicts it found, which + obviously would not work well when there are too many of them. + + * The name-hash subsystem that is used to cope with case insensitive + filesystems keeps track of directories and their on-filesystem + cases for all the paths in the index by holding a pointer to a + randomly chosen cache entry that is inside the directory (for its + ce->ce_name component). This pointer was not updated even when the + cache entry was removed from the index, leading to use after free. + This was fixed by recording the path for each directory instead of + borrowing cache entries and restructuring the API somewhat. + + * When the "git am" command was reimplemented in C, "git am -3" had a + small regression where it is aborted in its error handling codepath + when underlying merge-recursive failed in some ways. + + * The synopsis text and the usage string of subcommands that read + list of things from the standard input are often shown as if they + only take input from a file on a filesystem, which was misleading. + + * A couple of commands still showed "[options]" in their usage string + to note where options should come on their command line, but we + spell that "[<options>]" in most places these days. + + * The submodule code has been taught to work better with separate + work trees created via "git worktree add". + + * When "git gc --auto" is backgrounded, its diagnosis message is + lost. It now is saved to a file in $GIT_DIR and is shown next time + the "gc --auto" is run. + + * Work around "git p4" failing when the P4 depot records the contents + in UTF-16 without UTF-16 BOM. + + * Recent update to "rebase -i" that tries to sanity check the edited + insn sheet before it uses it has become too picky on Windows where + CRLF left by the editor is turned into a trailing CR on the line + read via the "read" built-in command. + + * "git clone --dissociate" runs a big "git repack" process at the + end, and it helps to close file descriptors that are open on the + packs and their idx files before doing so on filesystems that + cannot remove a file that is still open. + + * Correct "git p4 --detect-labels" so that it does not fail to create + a tag that points at a commit that is also being imported. + + * The internal stripspace() function has been moved to where it + logically belongs to, i.e. strbuf API, and the command line parser + of "git stripspace" has been updated to use the parse_options API. + + * Prepare for Git on-disk repository representation to undergo + backward incompatible changes by introducing a new repository + format version "1", with an extension mechanism. + + * "git gc" used to barf when a symbolic ref has gone dangling + (e.g. the branch that used to be your upstream's default when you + cloned from it is now gone, and you did "fetch --prune"). + + * The normalize_ceiling_entry() function does not muck with the end + of the path it accepts, and the real world callers do rely on that, + but a test insisted that the function drops a trailing slash. + + * "git gc" is safe to run anytime only because it has the built-in + grace period to protect young objects. In order to run with no + grace period, the user must make sure that the repository is + quiescent. + + * A recent "filter-branch --msg-filter" broke skipping of the commit + object header, which is fixed. + + * "git --literal-pathspecs add -u/-A" without any command line + argument misbehaved ever since Git 2.0. + + * Merging a branch that removes a path and another that changes the + mode bits on the same path should have conflicted at the path, but + it didn't and silently favoured the removal. + + * "git imap-send" did not compile well with older version of cURL library. + + * The linkage order of libraries was wrong in places around libcurl. + + * It was not possible to use a repository-lookalike created by "git + worktree add" as a local source of "git clone". + + * When "git send-email" wanted to talk over Net::SMTP::SSL, + Net::Cmd::datasend() did not like to be fed too many bytes at the + same time and failed to send messages. Send the payload one line + at a time to work around the problem. + + * We peek objects from submodule's object store by linking it to the + list of alternate object databases, but the code to do so forgot to + correctly initialize the list. + + * "git status --branch --short" accessed beyond the constant string + "HEAD", which has been corrected. + + * "git daemon" uses "run_command()" without "finish_command()", so it + needs to release resources itself, which it forgot to do. + +Also contains typofixes, documentation updates and trivial code +clean-ups. diff --git a/Documentation/RelNotes/2.6.4.txt b/Documentation/RelNotes/2.6.4.txt new file mode 100644 index 0000000..b0256a2 --- /dev/null +++ b/Documentation/RelNotes/2.6.4.txt @@ -0,0 +1,63 @@ +Git v2.6.4 Release Notes +======================== + +Fixes since v2.6.3 +------------------ + + * The "configure" script did not test for -lpthread correctly, which + upset some linkers. + + * Add support for talking http/https over socks proxy. + + * Portability fix for Windows, which may rewrite $SHELL variable using + non-POSIX paths. + + * We now consistently allow all hooks to ignore their standard input, + rather than having git complain of SIGPIPE. + + * Fix shell quoting in contrib script. + + * Test portability fix for a topic in v2.6.1. + + * Allow tilde-expansion in some http config variables. + + * Give a useful special case "diff/show --word-diff-regex=." as an + example in the documentation. + + * Fix for a corner case in filter-branch. + + * Make git-p4 work on a detached head. + + * Documentation clarification for "check-ignore" without "--verbose". + + * Just like the working tree is cleaned up when the user cancelled + submission in P4Submit.applyCommit(), clean up the mess if "p4 + submit" fails. + + * Having a leftover .idx file without corresponding .pack file in + the repository hurts performance; "git gc" learned to prune them. + + * The code to prepare the working tree side of temporary directory + for the "dir-diff" feature forgot that symbolic links need not be + copied (or symlinked) to the temporary area, as the code already + special cases and overwrites them. Besides, it was wrong to try + computing the object name of the target of symbolic link, which may + not even exist or may be a directory. + + * There was no way to defeat a configured rebase.autostash variable + from the command line, as "git rebase --no-autostash" was missing. + + * Allow "git interpret-trailers" to run outside of a Git repository. + + * Produce correct "dirty" marker for shell prompts, even when we + are on an orphan or an unborn branch. + + * Some corner cases have been fixed in string-matching done in "git + status". + + * Apple's common crypto implementation of SHA1_Update() does not take + more than 4GB at a time, and we now have a compile-time workaround + for it. + +Also contains typofixes, documentation updates and trivial code +clean-ups. diff --git a/Documentation/RelNotes/2.6.5.txt b/Documentation/RelNotes/2.6.5.txt new file mode 100644 index 0000000..f0924b6 --- /dev/null +++ b/Documentation/RelNotes/2.6.5.txt @@ -0,0 +1,58 @@ +Git v2.6.5 Release Notes +======================== + +Fixes since v2.6.4 +------------------ + + * Because "test_when_finished" in our test framework queues the + clean-up tasks to be done in a shell variable, it should not be + used inside a subshell. Add a mechanism to allow 'bash' to catch + such uses, and fix the ones that were found. + + * Update "git subtree" (in contrib/) so that it can take whitespaces + in the pathnames, not only in the in-tree pathname but the name of + the directory that the repository is in. + + * Cosmetic improvement to lock-file error messages. + + * mark_tree_uninteresting() has code to handle the case where it gets + passed a NULL pointer in its 'tree' parameter, but the function had + 'object = &tree->object' assignment before checking if tree is + NULL. This gives a compiler an excuse to declare that tree will + never be NULL and apply a wrong optimization. Avoid it. + + * The helper used to iterate over loose object directories to prune + stale objects did not closedir() immediately when it is done with a + directory--a callback such as the one used for "git prune" may want + to do rmdir(), but it would fail on open directory on platforms + such as WinXP. + + * "git p4" used to import Perforce CLs that touch only paths outside + the client spec as empty commits. It has been corrected to ignore + them instead, with a new configuration git-p4.keepEmptyCommits as a + backward compatibility knob. + + * The exit code of git-fsck did not reflect some types of errors + found in packed objects, which has been corrected. + + * The completion script (in contrib/) used to list "git column" + (which is not an end-user facing command) as one of the choices + + * Improve error reporting when SMTP TLS fails. + + * When getpwuid() on the system returned NULL (e.g. the user is not + in the /etc/passwd file or other uid-to-name mappings), the + codepath to find who the user is to record it in the reflog barfed + and died. Loosen the check in this codepath, which already accepts + questionable ident string (e.g. host part of the e-mail address is + obviously bogus), and in general when we operate fmt_ident() function + in non-strict mode. + + * "git symbolic-ref" forgot to report a failure with its exit status. + + * History traversal with "git log --source" that starts with an + annotated tag failed to report the tag as "source", due to an + old regression in the command line parser back in v2.2 days. + +Also contains typofixes, documentation updates and trivial code +clean-ups. diff --git a/Documentation/RelNotes/2.6.6.txt b/Documentation/RelNotes/2.6.6.txt new file mode 100644 index 0000000..023ad85 --- /dev/null +++ b/Documentation/RelNotes/2.6.6.txt @@ -0,0 +1,11 @@ +Git v2.6.6 Release Notes +======================== + +Fixes since v2.6.5 +------------------ + + * Bugfix patches were backported from the 'master' front to plug heap + corruption holes, to catch integer overflow in the computation of + pathname lengths, and to get rid of the name_path API. Both of + these would have resulted in writing over an under-allocated buffer + when formulating pathnames while tree traversal. diff --git a/Documentation/RelNotes/2.7.0.txt b/Documentation/RelNotes/2.7.0.txt new file mode 100644 index 0000000..563dadc --- /dev/null +++ b/Documentation/RelNotes/2.7.0.txt @@ -0,0 +1,414 @@ +Git 2.7 Release Notes +===================== + +Updates since v2.6 +------------------ + +UI, Workflows & Features + + * The appearance of "gitk", particularly on high DPI monitors, have + been improved. "gitk" also comes with an undated translation for + Swedish and Japanese. + + * "git remote" learned "get-url" subcommand to show the URL for a + given remote name used for fetching and pushing. + + * There was no way to defeat a configured rebase.autostash variable + from the command line, as "git rebase --no-autostash" was missing. + + * "git log --date=local" used to only show the normal (default) + format in the local timezone. The command learned to take 'local' + as an instruction to use the local timezone with other formats, + + * The refs used during a "git bisect" session is now per-worktree so + that independent bisect sessions can be done in different worktrees + created with "git worktree add". + + * Users who are too busy to type three extra keystrokes to ask for + "git stash show -p" can now set stash.showPatch configuration + variable to true to always see the actual patch, not just the list + of paths affected with feel for the extent of damage via diffstat. + + * "quiltimport" allows to specify the series file by honoring the + $QUILT_SERIES environment and also --series command line option. + + * The use of 'good/bad' in "git bisect" made it confusing to use when + hunting for a state change that is not a regression (e.g. bugfix). + The command learned 'old/new' and then allows the end user to + say e.g. "bisect start --term-old=fast --term-new=slow" to find a + performance regression. + + * "git interpret-trailers" can now run outside of a Git repository. + + * "git p4" learned to reencode the pathname it uses to communicate + with the p4 depot with a new option. + + * Give progress meter to "git filter-branch". + + * Allow a later "!/abc/def" to override an earlier "/abc" that + appears in the same .gitignore file to make it easier to express + "everything in /abc directory is ignored, except for ...". + + * Teach "git p4" to send large blobs outside the repository by + talking to Git LFS. + + * Prepare for Git on-disk repository representation to undergo + backward incompatible changes by introducing a new repository + format version "1", with an extension mechanism. + + * "git worktree" learned a "list" subcommand. + + * "git clone --dissociate" learned that it can be used even when + "--reference" was not used at the same time. + + * "git blame" learnt to take "--first-parent" and "--reverse" at the + same time when it makes sense. + + * "git checkout" did not follow the usual "--[no-]progress" + convention and implemented only "--quiet" that is essentially + a superset of "--no-progress". Extend the command to support the + usual "--[no-]progress". + + * The semantics of transfer.hideRefs configuration variable have been + extended to work better with the ref "namespace" feature that lets + you throw unrelated bunches of repositories in a single physical + repository and virtually serve them as separate ones. + + * send-email config variables whose values are pathnames now go + through the ~username/ expansion. + + * bash completion learnt to TAB-complete recipient addresses given + to send-email. + + * The credential-cache daemon can be told to ignore SIGHUP to work + around issue when running Git from inside emacs. + + * "git push" learned new configuration for doing "--recurse-submodules" + on each push. + + * "format-patch" has learned a new option to zero-out the commit + object name on the mbox "From " line. + + +Performance, Internal Implementation, Development Support etc. + + * The infrastructure to rewrite "git submodule" in C is being built + incrementally. Let's polish these early parts well enough and make + them graduate to 'next' and 'master', so that the more involved + follow-up can start cooking on a solid ground. + + * Some features from "git tag -l" and "git branch -l" have been made + available to "git for-each-ref" so that eventually the unified + implementation can be shared across all three. The version merged + to the 'master' branch earlier had a performance regression in "tag + --contains", which has since been corrected. + + * Because "test_when_finished" in our test framework queues the + clean-up tasks to be done in a shell variable, it should not be + used inside a subshell. Add a mechanism to allow 'bash' to catch + such uses, and fix the ones that were found. + + * The debugging infrastructure for pkt-line based communication has + been improved to mark the side-band communication specifically. + + * Update "git branch" that list existing branches, using the + ref-filter API that is shared with "git tag" and "git + for-each-ref". + + * The test for various line-ending conversions has been enhanced. + + * A few test scripts around "git p4" have been improved for + portability. + + * Many allocations that is manually counted (correctly) that are + followed by strcpy/sprintf have been replaced with a less error + prone constructs such as xstrfmt. + + * The internal stripspace() function has been moved to where it + logically belongs to, i.e. strbuf API, and the command line parser + of "git stripspace" has been updated to use the parse_options API. + + * "git am" used to spawn "git mailinfo" via run_command() API once + per each patch, but learned to make a direct call to mailinfo() + instead. + + * The implementation of "git mailinfo" was refactored so that a + mailinfo() function can be directly called from inside a process. + + * With a "debug" helper, debugging of a single "git" invocation in + our test scripts has become a lot easier. + + * The "configure" script did not test for -lpthread correctly, which + upset some linkers. + + * Cross completed task off of subtree project's todo list. + + * Test cleanups for the subtree project. + + * Clean up style in an ancient test t9300. + + * Work around some test flakiness with p4d. + + * Fsck did not correctly detect a NUL-truncated header in a tag. + + * Use a safer behavior when we hit errors verifying remote certificates. + + * Speed up filter-branch for cases where we only care about rewriting + commits, not tree data. + + * The parse-options API has been updated to make "-h" command line + option work more consistently in all commands. + + * "git svn rebase/mkdirs" got optimized by keeping track of empty + directories better. + + * Fix some racy client/server tests by treating SIGPIPE the same as a + normal non-zero exit. + + * The necessary infrastructure to build topics using the free Travis + CI has been added. Developers forking from this topic (and enabling + Travis) can do their own builds, and we can turn on auto-builds for + git/git (including build-status for pull requests that people + open). + + * The write(2) emulation for Windows learned to set errno to EPIPE + when necessary. + + +Also contains various documentation updates and code clean-ups. + + +Fixes since v2.6 +---------------- + +Unless otherwise noted, all the fixes since v2.6 in the maintenance +track are contained in this release (see the maintenance releases' +notes for details). + + * Very small number of options take a parameter that is optional + (which is not a great UI element as they can only appear at the end + of the command line). Add notice to documentation of each and + every one of them. + + * "git blame --first-parent v1.0..v2.0" was not rejected but did not + limit the blame to commits on the first parent chain. + + * "git subtree" (in contrib/) now can take whitespaces in the + pathnames, not only in the in-tree pathname but the name of the + directory that the repository is in. + + * The ssh transport, just like any other transport over the network, + did not clear GIT_* environment variables, but it is possible to + use SendEnv and AcceptEnv to leak them to the remote invocation of + Git, which is not a good idea at all. Explicitly clear them just + like we do for the local transport. + + * Correct "git p4 --detect-labels" so that it does not fail to create + a tag that points at a commit that is also being imported. + + * The Makefile always runs the library archiver with hardcoded "crs" + options, which was inconvenient for exotic platforms on which + people want to use programs with totally different set of command + line options. + + * Customization to change the behaviour with "make -w" and "make -s" + in our Makefile was broken when they were used together. + + * Allocation related functions and stdio are unsafe things to call + inside a signal handler, and indeed killing the pager can cause + glibc to deadlock waiting on allocation mutex as our signal handler + tries to free() some data structures in wait_for_pager(). Reduce + these unsafe calls. + + * The way how --ref/--notes to specify the notes tree reference are + DWIMmed was not clearly documented. + + * "git gc" used to barf when a symbolic ref has gone dangling + (e.g. the branch that used to be your upstream's default when you + cloned from it is now gone, and you did "fetch --prune"). + + * "git clone --dissociate" runs a big "git repack" process at the + end, and it helps to close file descriptors that are open on the + packs and their idx files before doing so on filesystems that + cannot remove a file that is still open. + + * Description of the "log.follow" configuration variable in "git log" + documentation is now also copied to "git config" documentation. + + * "git rebase -i" had a minor regression recently, which stopped + considering a line that begins with an indented '#' in its insn + sheet not a comment. Further, the code was still too picky on + Windows where CRLF left by the editor is turned into a trailing CR + on the line read via the "read" built-in command of bash. Both of + these issues are now fixed. + + * After "git checkout --detach", "git status" reported a fairly + useless "HEAD detached at HEAD", instead of saying at which exact + commit. + + * When "git send-email" wanted to talk over Net::SMTP::SSL, + Net::Cmd::datasend() did not like to be fed too many bytes at the + same time and failed to send messages. Send the payload one line + at a time to work around the problem. + + * When "git am" was rewritten as a built-in, it stopped paying + attention to user.signingkey, which was fixed. + + * It was not possible to use a repository-lookalike created by "git + worktree add" as a local source of "git clone". + + * On a case insensitive filesystems, setting GIT_WORK_TREE variable + using a random cases that does not agree with what the filesystem + thinks confused Git that it wasn't inside the working tree. + + * Performance-measurement tests did not work without an installed Git. + + * A test script for the HTTP service had a timing dependent bug, + which was fixed. + + * There were some classes of errors that "git fsck" diagnosed to its + standard error that did not cause it to exit with non-zero status. + + * Work around "git p4" failing when the P4 depot records the contents + in UTF-16 without UTF-16 BOM. + + * When "git gc --auto" is backgrounded, its diagnosis message is + lost. Save it to a file in $GIT_DIR and show it next time the "gc + --auto" is run. + + * The submodule code has been taught to work better with separate + work trees created via "git worktree add". + + * "git gc" is safe to run anytime only because it has the built-in + grace period to protect young objects. In order to run with no + grace period, the user must make sure that the repository is + quiescent. + + * A recent "filter-branch --msg-filter" broke skipping of the commit + object header, which is fixed. + + * The normalize_ceiling_entry() function does not muck with the end + of the path it accepts, and the real world callers do rely on that, + but a test insisted that the function drops a trailing slash. + + * A test for interaction between untracked cache and sparse checkout + added in Git 2.5 days were flaky. + + * A couple of commands still showed "[options]" in their usage string + to note where options should come on their command line, but we + spell that "[<options>]" in most places these days. + + * The synopsis text and the usage string of subcommands that read + list of things from the standard input are often shown as if they + only take input from a file on a filesystem, which was misleading. + + * "git am -3" had a small regression where it is aborted in its error + handling codepath when underlying merge-recursive failed in certain + ways, as it assumed that the internal call to merge-recursive will + never die, which is not the case (yet). + + * The linkage order of libraries was wrong in places around libcurl. + + * The name-hash subsystem that is used to cope with case insensitive + filesystems keeps track of directories and their on-filesystem + cases for all the paths in the index by holding a pointer to a + randomly chosen cache entry that is inside the directory (for its + ce->ce_name component). This pointer was not updated even when the + cache entry was removed from the index, leading to use after free. + This was fixed by recording the path for each directory instead of + borrowing cache entries and restructuring the API somewhat. + + * "git merge-file" tried to signal how many conflicts it found, which + obviously would not work well when there are too many of them. + + * The error message from "git blame --contents --reverse" incorrectly + talked about "--contents --children". + + * "git imap-send" did not compile well with older version of cURL library. + + * Merging a branch that removes a path and another that changes the + mode bits on the same path should have conflicted at the path, but + it didn't and silently favoured the removal. + + * "git --literal-pathspecs add -u/-A" without any command line + argument misbehaved ever since Git 2.0. + + * "git daemon" uses "run_command()" without "finish_command()", so it + needs to release resources itself, which it forgot to do. + + * "git status --branch --short" accessed beyond the constant string + "HEAD", which has been corrected. + + * We peek objects from submodule's object store by linking it to the + list of alternate object databases, but the code to do so forgot to + correctly initialize the list. + + * The code to prepare the working tree side of temporary directory + for the "dir-diff" feature forgot that symbolic links need not be + copied (or symlinked) to the temporary area, as the code already + special cases and overwrites them. Besides, it was wrong to try + computing the object name of the target of symbolic link, which may + not even exist or may be a directory. + + * A Range: request can be responded with a full response and when + asked properly libcurl knows how to strip the result down to the + requested range. However, we were hand-crafting a range request + and it did not kick in. + + * Having a leftover .idx file without corresponding .pack file in + the repository hurts performance; "git gc" learned to prune them. + + * Apple's common crypto implementation of SHA1_Update() does not take + more than 4GB at a time, and we now have a compile-time workaround + for it. + + * Produce correct "dirty" marker for shell prompts, even when we + are on an orphan or an unborn branch. + + * A build without NO_IPv6 used to use gethostbyname() when guessing + user's hostname, instead of getaddrinfo() that is used in other + codepaths in such a build. + + * The exit code of git-fsck did not reflect some types of errors + found in packed objects, which has been corrected. + + * The helper used to iterate over loose object directories to prune + stale objects did not closedir() immediately when it is done with a + directory--a callback such as the one used for "git prune" may want + to do rmdir(), but it would fail on open directory on platforms + such as WinXP. + + * "git p4" used to import Perforce CLs that touch only paths outside + the client spec as empty commits. It has been corrected to ignore + them instead, with a new configuration git-p4.keepEmptyCommits as a + backward compatibility knob. + + * The completion script (in contrib/) used to list "git column" + (which is not an end-user facing command) as one of the choices + (merge 160fcdb sg/completion-no-column later to maint). + + * The error reporting from "git send-email", when SMTP TLS fails, has + been improved. + (merge 9d60524 jk/send-email-ssl-errors later to maint). + + * When getpwuid() on the system returned NULL (e.g. the user is not + in the /etc/passwd file or other uid-to-name mappings), the + codepath to find who the user is to record it in the reflog barfed + and died. Loosen the check in this codepath, which already accepts + questionable ident string (e.g. host part of the e-mail address is + obviously bogus), and in general when we operate fmt_ident() function + in non-strict mode. + (merge 92bcbb9 jk/ident-loosen-getpwuid later to maint). + + * "git symbolic-ref" forgot to report a failure with its exit status. + (merge f91b273 jk/symbolic-ref-maint later to maint). + + * History traversal with "git log --source" that starts with an + annotated tag failed to report the tag as "source", due to an + old regression in the command line parser back in v2.2 days. + (merge 728350b jk/pending-keep-tag-name later to maint). + + * "git p4" when interacting with multiple depots at the same time + used to incorrectly drop changes. + + * Code clean-up, minor fixes etc. diff --git a/Documentation/RelNotes/2.7.1.txt b/Documentation/RelNotes/2.7.1.txt new file mode 100644 index 0000000..6553d69 --- /dev/null +++ b/Documentation/RelNotes/2.7.1.txt @@ -0,0 +1,87 @@ +Git v2.7.1 Release Notes +======================== + +Fixes since v2.7 +---------------- + + * An earlier change in 2.5.x-era broke users' hooks and aliases by + exporting GIT_WORK_TREE to point at the root of the working tree, + interfering when they tried to use a different working tree without + setting GIT_WORK_TREE environment themselves. + + * The "exclude_list" structure has the usual "alloc, nr" pair of + fields to be used by ALLOC_GROW(), but clear_exclude_list() forgot + to reset 'alloc' to 0 when it cleared 'nr' to discard the managed + array. + + * "git send-email" was confused by escaped quotes stored in the alias + files saved by "mutt", which has been corrected. + + * A few unportable C construct have been spotted by clang compiler + and have been fixed. + + * The documentation has been updated to hint the connection between + the '--signoff' option and DCO. + + * "git reflog" incorrectly assumed that all objects that used to be + at the tip of a ref must be commits, which caused it to segfault. + + * The ignore mechanism saw a few regressions around untracked file + listing and sparse checkout selection areas in 2.7.0; the change + that is responsible for the regression has been reverted. + + * Some codepaths used fopen(3) when opening a fixed path in $GIT_DIR + (e.g. COMMIT_EDITMSG) that is meant to be left after the command is + done. This however did not work well if the repository is set to + be shared with core.sharedRepository and the umask of the previous + user is tighter. They have been made to work better by calling + unlink(2) and retrying after fopen(3) fails with EPERM. + + * Asking gitweb for a nonexistent commit left a warning in the server + log. + + * "git rebase", unlike all other callers of "gc --auto", did not + ignore the exit code from "gc --auto". + + * Many codepaths that run "gc --auto" before exiting kept packfiles + mapped and left the file descriptors to them open, which was not + friendly to systems that cannot remove files that are open. They + now close the packs before doing so. + + * A recent optimization to filter-branch in v2.7.0 introduced a + regression when --prune-empty filter is used, which has been + corrected. + + * The description for SANITY prerequisite the test suite uses has + been clarified both in the comment and in the implementation. + + * "git tag" started listing a tag "foo" as "tags/foo" when a branch + named "foo" exists in the same repository; remove this unnecessary + disambiguation, which is a regression introduced in v2.7.0. + + * The way "git svn" uses auth parameter was broken by Subversion + 1.9.0 and later. + + * The "split" subcommand of "git subtree" (in contrib/) incorrectly + skipped merges when it shouldn't, which was corrected. + + * A few options of "git diff" did not work well when the command was + run from a subdirectory. + + * dirname() emulation has been added, as Msys2 lacks it. + + * The underlying machinery used by "ls-files -o" and other commands + have been taught not to create empty submodule ref cache for a + directory that is not a submodule. This removes a ton of wasted + CPU cycles. + + * Drop a few old "todo" items by deciding that the change one of them + suggests is not such a good idea, and doing the change the other + one suggested to do. + + * Documentation for "git fetch --depth" has been updated for clarity. + + * The command line completion learned a handful of additional options + and command specific syntax. + +Also includes a handful of documentation and test updates. diff --git a/Documentation/RelNotes/2.7.2.txt b/Documentation/RelNotes/2.7.2.txt new file mode 100644 index 0000000..4feef76 --- /dev/null +++ b/Documentation/RelNotes/2.7.2.txt @@ -0,0 +1,41 @@ +Git v2.7.2 Release Notes +======================== + +Fixes since v2.7.1 +------------------ + + * The low-level merge machinery has been taught to use CRLF line + termination when inserting conflict markers to merged contents that + are themselves CRLF line-terminated. + + * "git worktree" had a broken code that attempted to auto-fix + possible inconsistency that results from end-users moving a + worktree to different places without telling Git (the original + repository needs to maintain backpointers to its worktrees, but + "mv" run by end-users who are not familiar with that fact will + obviously not adjust them), which actually made things worse + when triggered. + + * "git push --force-with-lease" has been taught to report if the push + needed to force (or fast-forwarded). + + * The emulated "yes" command used in our test scripts has been + tweaked not to spend too much time generating unnecessary output + that is not used, to help those who test on Windows where it would + not stop until it fills the pipe buffer due to lack of SIGPIPE. + + * The vimdiff backend for "git mergetool" has been tweaked to arrange + and number buffers in the order that would match the expectation of + majority of people who read left to right, then top down and assign + buffers 1 2 3 4 "mentally" to local base remote merge windows based + on that order. + + * The documentation for "git clean" has been corrected; it mentioned + that .git/modules/* are removed by giving two "-f", which has never + been the case. + + * Paths that have been told the index about with "add -N" are not + quite yet in the index, but a few commands behaved as if they + already are in a harmful way. + +Also includes tiny documentation and test updates. diff --git a/Documentation/RelNotes/2.7.3.txt b/Documentation/RelNotes/2.7.3.txt new file mode 100644 index 0000000..6adf038 --- /dev/null +++ b/Documentation/RelNotes/2.7.3.txt @@ -0,0 +1,62 @@ +Git v2.7.3 Release Notes +======================== + +Fixes since v2.7.2 +------------------ + + * Traditionally, the tests that try commands that work on the + contents in the working tree were named with "worktree" in their + filenames, but with the recent addition of "git worktree" + subcommand, whose tests are also named similarly, it has become + harder to tell them apart. The traditional tests have been renamed + to use "work-tree" instead in an attempt to differentiate them. + + * Many codepaths forget to check return value from git_config_set(); + the function is made to die() to make sure we do not proceed when + setting a configuration variable failed. + + * Handling of errors while writing into our internal asynchronous + process has been made more robust, which reduces flakiness in our + tests. + + * "git show 'HEAD:Foo[BAR]Baz'" did not interpret the argument as a + rev, i.e. the object named by the the pathname with wildcard + characters in a tree object. + + * "git rev-parse --git-common-dir" used in the worktree feature + misbehaved when run from a subdirectory. + + * The "v(iew)" subcommand of the interactive "git am -i" command was + broken in 2.6.0 timeframe when the command was rewritten in C. + + * "git merge-tree" used to mishandle "both sides added" conflict with + its own "create a fake ancestor file that has the common parts of + what both sides have added and do a 3-way merge" logic; this has + been updated to use the usual "3-way merge with an empty blob as + the fake common ancestor file" approach used in the rest of the + system. + + * The memory ownership rule of fill_textconv() API, which was a bit + tricky, has been documented a bit better. + + * The documentation did not clearly state that the 'simple' mode is + now the default for "git push" when push.default configuration is + not set. + + * Recent versions of GNU grep are pickier when their input contains + arbitrary binary data, which some of our tests uses. Rewrite the + tests to sidestep the problem. + + * A helper function "git submodule" uses since v2.7.0 to list the + modules that match the pathspec argument given to its subcommands + (e.g. "submodule add <repo> <path>") has been fixed. + + * "git config section.var value" to set a value in per-repository + configuration file failed when it was run outside any repository, + but didn't say the reason correctly. + + * The code to read the pack data using the offsets stored in the pack + idx file has been made more carefully check the validity of the + data in the idx. + +Also includes documentation and test updates. diff --git a/Documentation/RelNotes/2.7.4.txt b/Documentation/RelNotes/2.7.4.txt new file mode 100644 index 0000000..883ae89 --- /dev/null +++ b/Documentation/RelNotes/2.7.4.txt @@ -0,0 +1,11 @@ +Git v2.7.4 Release Notes +======================== + +Fixes since v2.7.3 +------------------ + + * Bugfix patches were backported from the 'master' front to plug heap + corruption holes, to catch integer overflow in the computation of + pathname lengths, and to get rid of the name_path API. Both of + these would have resulted in writing over an under-allocated buffer + when formulating pathnames while tree traversal. diff --git a/Documentation/RelNotes/2.8.0.txt b/Documentation/RelNotes/2.8.0.txt new file mode 100644 index 0000000..2507971 --- /dev/null +++ b/Documentation/RelNotes/2.8.0.txt @@ -0,0 +1,439 @@ +Git 2.8 Release Notes +===================== + +Backward compatibility note +--------------------------- + +The rsync:// transport has been removed. + + +Updates since v2.7 +------------------ + +UI, Workflows & Features + + * It turns out "git clone" over rsync transport has been broken when + the source repository has packed references for a long time, and + nobody noticed nor complained about it. + + * "push" learned that its "--delete" option can be shortened to + "-d", just like "branch --delete" and "branch -d" are the same + thing. + + * "git blame" learned to produce the progress eye-candy when it takes + too much time before emitting the first line of the result. + + * "git grep" can now be configured (or told from the command line) + how many threads to use when searching in the working tree files. + + * Some "git notes" operations, e.g. "git log --notes=<note>", should + be able to read notes from any tree-ish that is shaped like a notes + tree, but the notes infrastructure required that the argument must + be a ref under refs/notes/. Loosen it to require a valid ref only + when the operation would update the notes (in which case we must + have a place to store the updated notes tree, iow, a ref). + + * "git grep" by default does not fall back to its "--no-index" + behavior outside a directory under Git's control (otherwise the + user may by mistake end up running a huge recursive search); with a + new configuration (set in $HOME/.gitconfig--by definition this + cannot be set in the config file per project), this safety can be + disabled. + + * "git pull --rebase" has been extended to allow invoking + "rebase -i". + + * "git p4" learned to cope with the type of a file getting changed. + + * "git format-patch" learned to notice format.outputDirectory + configuration variable. This allows "-o <dir>" option to be + omitted on the command line if you always use the same directory in + your workflow. + + * "interpret-trailers" has been taught to optionally update a file in + place, instead of always writing the result to the standard output. + + * Many commands that read files that are expected to contain text + that is generated (or can be edited) by the end user to control + their behavior (e.g. "git grep -f <filename>") have been updated + to be more tolerant to lines that are terminated with CRLF (they + used to treat such a line to contain payload that ends with CR, + which is usually not what the users expect). + + * "git notes merge" used to limit the source of the merged notes tree + to somewhere under refs/notes/ hierarchy, which was too limiting + when inventing a workflow to exchange notes with remote + repositories using remote-tracking notes trees (located in e.g. + refs/remote-notes/ or somesuch). + + * "git ls-files" learned a new "--eol" option to help diagnose + end-of-line problems. + + * "ls-remote" learned an option to show which branch the remote + repository advertises as its primary by pointing its HEAD at. + + * New http.proxyAuthMethod configuration variable can be used to + specify what authentication method to use, as a way to work around + proxies that do not give error response expected by libcurl when + CURLAUTH_ANY is used. Also, the codepath for proxy authentication + has been taught to use credential API to store the authentication + material in user's keyrings. + + * Update the untracked cache subsystem and change its primary UI from + "git update-index" to "git config". + + * There were a few "now I am doing this thing" progress messages in + the TCP connection code that can be triggered by setting a verbose + option internally in the code, but "git fetch -v" and friends never + passed the verbose option down to that codepath. + + * Clean/smudge filters defined in a configuration file of lower + precedence can now be overridden to be a pass-through no-op by + setting the variable to an empty string. + + * A new "<branch>^{/!-<pattern>}" notation can be used to name a + commit that is reachable from <branch> that does not match the + given <pattern>. + + * The "user.useConfigOnly" configuration variable can be used to + force the user to always set user.email & user.name configuration + variables, serving as a reminder for those who work on multiple + projects and do not want to put these in their $HOME/.gitconfig. + + * "git fetch" and friends that make network connections can now be + told to only use ipv4 (or ipv6). + + * Some authentication methods do not need username or password, but + libcurl needs some hint that it needs to perform authentication. + Supplying an empty username and password string is a valid way to + do so, but you can set the http.[<url>.]emptyAuth configuration + variable to achieve the same, if you find it cleaner. + + * You can now set http.[<url>.]pinnedpubkey to specify the pinned + public key when building with recent enough versions of libcURL. + + * The configuration system has been taught to phrase where it found a + bad configuration variable in a better way in its error messages. + "git config" learnt a new "--show-origin" option to indicate where + the values come from. + + * The "credential-cache" daemon process used to run in whatever + directory it happened to start in, but this made umount(2)ing the + filesystem that houses the repository harder; now the process + chdir()s to the directory that house its own socket on startup. + + * When "git submodule update" did not result in fetching the commit + object in the submodule that is referenced by the superproject, the + command learned to retry another fetch, specifically asking for + that commit that may not be connected to the refs it usually + fetches. + + * "git merge-recursive" learned "--no-renames" option to disable its + rename detection logic. + + * Across the transition at around Git version 2.0, the user used to + get a pretty loud warning when running "git push" without setting + push.default configuration variable. We no longer warn because the + transition was completed a long time ago. + + * README has been renamed to README.md and its contents got tweaked + slightly to make it easier on the eyes. + + +Performance, Internal Implementation, Development Support etc. + + * Add a framework to spawn a group of processes in parallel, and use + it to run "git fetch --recurse-submodules" in parallel. + + * A slight update to the Makefile to mark ".PHONY" targets as such + correctly. + + * In-core storage of the reverse index for .pack files (which lets + you go from a pack offset to an object name) has been streamlined. + + * d95138e6 (setup: set env $GIT_WORK_TREE when work tree is set, like + $GIT_DIR, 2015-06-26) attempted to work around a glitch in alias + handling by overwriting GIT_WORK_TREE environment variable to + affect subprocesses when set_git_work_tree() gets called, which + resulted in a rather unpleasant regression to "clone" and "init". + Try to address the same issue by always restoring the environment + and respawning the real underlying command when handling alias. + + * The low-level code that is used to create symbolic references has + been updated to share more code with the code that deals with + normal references. + + * strbuf_getline() and friends have been redefined to make it easier + to identify which callsite of (new) strbuf_getline_lf() should + allow and silently ignore carriage-return at the end of the line to + help users on DOSsy systems. + + * "git shortlog" used to accumulate various pieces of information + regardless of what was asked to be shown in the final output. It + has been optimized by noticing what need not to be collected + (e.g. there is no need to collect the log messages when showing + only the number of changes). + + * "git checkout $branch" (and other operations that share the same + underlying machinery) has been optimized. + + * Automated tests in Travis CI environment has been optimized by + persisting runtime statistics of previous "prove" run, executing + tests that take longer before other ones; this reduces the total + wallclock time. + + * Test scripts have been updated to remove assumptions that are not + portable between Git for POSIX and Git for Windows, or to skip ones + with expectations that are not satisfiable on Git for Windows. + + * Some calls to strcpy(3) triggers a false warning from static + analyzers that are less intelligent than humans, and reducing the + number of these false hits helps us notice real issues. A few + calls to strcpy(3) in a couple of protrams that are already safe + has been rewritten to avoid false warnings. + + * The "name_path" API was an attempt to reduce the need to construct + the full path out of a series of path components while walking a + tree hierarchy, but over time made less efficient because the path + needs to be flattened, e.g. to be compared with another path that + is already flat. The API has been removed and its users have been + rewritten to simplify the overall code complexity. + + * Help those who debug http(s) part of the system. + (merge 0054045 sp/remote-curl-ssl-strerror later to maint). + + * The internal API to interact with "remote.*" configuration + variables has been streamlined. + + * The ref-filter's format-parsing code has been refactored, in + preparation for "branch --format" and friends. + + * Traditionally, the tests that try commands that work on the + contents in the working tree were named with "worktree" in their + filenames, but with the recent addition of "git worktree" + subcommand, whose tests are also named similarly, it has become + harder to tell them apart. The traditional tests have been renamed + to use "work-tree" instead in an attempt to differentiate them. + (merge 5549029 mg/work-tree-tests later to maint). + + * Many codepaths forget to check return value from git_config_set(); + the function is made to die() to make sure we do not proceed when + setting a configuration variable failed. + (merge 3d18064 ps/config-error later to maint). + + * Handling of errors while writing into our internal asynchronous + process has been made more robust, which reduces flakiness in our + tests. + (merge 43f3afc jk/epipe-in-async later to maint). + + * There is a new DEVELOPER knob that enables many compiler warning + options in the Makefile. + + * The way the test scripts configure the Apache web server has been + updated to work also for Apache 2.4 running on RedHat derived + distros. + + * Out of maintenance gcc on OSX 10.6 fails to compile the code in + 'master'; work it around by using clang by default on the platform. + + * The "name_path" API was an attempt to reduce the need to construct + the full path out of a series of path components while walking a + tree hierarchy, but over time made less efficient because the path + needs to be flattened, e.g. to be compared with another path that + is already flat, in many cases. The API has been removed and its + users have been rewritten to simplify the overall code complexity. + This incidentally also closes some heap-corruption holes. + + * Recent versions of GNU grep is pickier than before to decide if a + file is "binary" and refuse to give line-oriented hits when we + expect it to, unless explicitly told with "-a" option. As our + scripted Porcelains use sane_grep wrapper for line-oriented data, + even when the line may contain non-ASCII payload we took from + end-user data, use "grep -a" to implement sane_grep wrapper when + using an implementation of "grep" that takes the "-a" option. + + + +Also contains various documentation updates and code clean-ups. + + +Fixes since v2.7 +---------------- + +Unless otherwise noted, all the fixes since v2.7 in the maintenance +track are contained in this release (see the maintenance releases' +notes for details). + + * An earlier change in 2.5.x-era broke users' hooks and aliases by + exporting GIT_WORK_TREE to point at the root of the working tree, + interfering when they tried to use a different working tree without + setting GIT_WORK_TREE environment themselves. + + * The "exclude_list" structure has the usual "alloc, nr" pair of + fields to be used by ALLOC_GROW(), but clear_exclude_list() forgot + to reset 'alloc' to 0 when it cleared 'nr' to discard the managed + array. + + * Paths that have been told the index about with "add -N" are not + quite yet in the index, but a few commands behaved as if they + already are in a harmful way. + + * "git send-email" was confused by escaped quotes stored in the alias + files saved by "mutt", which has been corrected. + + * A few non-portable C construct have been spotted by clang compiler + and have been fixed. + + * The documentation has been updated to hint the connection between + the '--signoff' option and DCO. + + * "git reflog" incorrectly assumed that all objects that used to be + at the tip of a ref must be commits, which caused it to segfault. + + * The ignore mechanism saw a few regressions around untracked file + listing and sparse checkout selection areas in 2.7.0; the change + that is responsible for the regression has been reverted. + + * Some codepaths used fopen(3) when opening a fixed path in $GIT_DIR + (e.g. COMMIT_EDITMSG) that is meant to be left after the command is + done. This however did not work well if the repository is set to + be shared with core.sharedRepository and the umask of the previous + user is tighter. They have been made to work better by calling + unlink(2) and retrying after fopen(3) fails with EPERM. + + * Asking gitweb for a nonexistent commit left a warning in the server + log. + + Somebody may want to follow this up with an additional test, perhaps? + IIRC, we do test that no Perl warnings are given to the server log, + so this should have been caught if our test coverage were good. + + * "git rebase", unlike all other callers of "gc --auto", did not + ignore the exit code from "gc --auto". + + * Many codepaths that run "gc --auto" before exiting kept packfiles + mapped and left the file descriptors to them open, which was not + friendly to systems that cannot remove files that are open. They + now close the packs before doing so. + + * A recent optimization to filter-branch in v2.7.0 introduced a + regression when --prune-empty filter is used, which has been + corrected. + + * The description for SANITY prerequisite the test suite uses has + been clarified both in the comment and in the implementation. + + * "git tag" started listing a tag "foo" as "tags/foo" when a branch + named "foo" exists in the same repository; remove this unnecessary + disambiguation, which is a regression introduced in v2.7.0. + + * The way "git svn" uses auth parameter was broken by Subversion + 1.9.0 and later. + + * The "split" subcommand of "git subtree" (in contrib/) incorrectly + skipped merges when it shouldn't, which was corrected. + + * A few options of "git diff" did not work well when the command was + run from a subdirectory. + + * The command line completion learned a handful of additional options + and command specific syntax. + + * dirname() emulation has been added, as Msys2 lacks it. + + * The underlying machinery used by "ls-files -o" and other commands + has been taught not to create empty submodule ref cache for a + directory that is not a submodule. This removes a ton of wasted + CPU cycles. + + * "git worktree" had a broken code that attempted to auto-fix + possible inconsistency that results from end-users moving a + worktree to different places without telling Git (the original + repository needs to maintain back-pointers to its worktrees, + but "mv" run by end-users who are not familiar with that fact + will obviously not adjust them), which actually made things + worse when triggered. + + * The low-level merge machinery has been taught to use CRLF line + termination when inserting conflict markers to merged contents that + are themselves CRLF line-terminated. + + * "git push --force-with-lease" has been taught to report if the push + needed to force (or fast-forwarded). + + * The emulated "yes" command used in our test scripts has been + tweaked not to spend too much time generating unnecessary output + that is not used, to help those who test on Windows where it would + not stop until it fills the pipe buffer due to lack of SIGPIPE. + + * The documentation for "git clean" has been corrected; it mentioned + that .git/modules/* are removed by giving two "-f", which has never + been the case. + + * The vimdiff backend for "git mergetool" has been tweaked to arrange + and number buffers in the order that would match the expectation of + majority of people who read left to right, then top down and assign + buffers 1 2 3 4 "mentally" to local base remote merge windows based + on that order. + + * "git show 'HEAD:Foo[BAR]Baz'" did not interpret the argument as a + rev, i.e. the object named by the the pathname with wildcard + characters in a tree object. + (merge aac4fac nd/dwim-wildcards-as-pathspecs later to maint). + + * "git rev-parse --git-common-dir" used in the worktree feature + misbehaved when run from a subdirectory. + (merge 17f1365 nd/git-common-dir-fix later to maint). + + * "git worktree add -B <branchname>" did not work. + + * The "v(iew)" subcommand of the interactive "git am -i" command was + broken in 2.6.0 timeframe when the command was rewritten in C. + (merge 708b8cc jc/am-i-v-fix later to maint). + + * "git merge-tree" used to mishandle "both sides added" conflict with + its own "create a fake ancestor file that has the common parts of + what both sides have added and do a 3-way merge" logic; this has + been updated to use the usual "3-way merge with an empty blob as + the fake common ancestor file" approach used in the rest of the + system. + (merge 907681e jk/no-diff-emit-common later to maint). + + * The memory ownership rule of fill_textconv() API, which was a bit + tricky, has been documented a bit better. + (merge a64e6a4 jk/more-comments-on-textconv later to maint). + + * Update various codepaths to avoid manually-counted malloc(). + (merge 08c95df jk/tighten-alloc later to maint). + + * The documentation did not clearly state that the 'simple' mode is + now the default for "git push" when push.default configuration is + not set. + (merge f6b1fb3 mm/push-simple-doc later to maint). + + * Recent versions of GNU grep are pickier when their input contains + arbitrary binary data, which some of our tests uses. Rewrite the + tests to sidestep the problem. + (merge 3b1442d jk/grep-binary-workaround-in-test later to maint). + + * A helper function "git submodule" uses since v2.7.0 to list the + modules that match the pathspec argument given to its subcommands + (e.g. "submodule add <repo> <path>") has been fixed. + (merge 2b56bb7 sb/submodule-module-list-fix later to maint). + + * "git config section.var value" to set a value in per-repository + configuration file failed when it was run outside any repository, + but didn't say the reason correctly. + (merge 638fa62 js/config-set-in-non-repository later to maint). + + * The code to read the pack data using the offsets stored in the pack + idx file has been made more carefully check the validity of the + data in the idx. + (merge 7465feb jk/pack-idx-corruption-safety later to maint). + + * Other minor clean-ups and documentation updates + (merge f459823 ak/extract-argv0-last-dir-sep later to maint). + (merge 63ca1c0 ak/git-strip-extension-from-dashed-command later to maint). + (merge 4867f11 ps/plug-xdl-merge-leak later to maint). + (merge 4938686 dt/initial-ref-xn-commit-doc later to maint). + (merge 9537f21 ma/update-hooks-sample-typofix later to maint). diff --git a/Documentation/RelNotes/2.8.1.txt b/Documentation/RelNotes/2.8.1.txt new file mode 100644 index 0000000..ef6d80b --- /dev/null +++ b/Documentation/RelNotes/2.8.1.txt @@ -0,0 +1,9 @@ +Git v2.8.1 Release Notes +======================== + +Fixes since v2.8 +---------------- + + * "make rpmbuild" target was broken as its input, git.spec.in, was + not updated to match a file it describes that has been renamed + recently. This has been fixed. diff --git a/Documentation/RelNotes/2.8.2.txt b/Documentation/RelNotes/2.8.2.txt new file mode 100644 index 0000000..447b193 --- /dev/null +++ b/Documentation/RelNotes/2.8.2.txt @@ -0,0 +1,70 @@ +Git v2.8.2 Release Notes +======================== + +Fixes since v2.8.1 +------------------ + + * The embedded args argv-array in the child process is used to build + the command line to run pack-objects instead of using a separate + array of strings. + + * Bunch of tests on "git clone" has been renumbered for better + organization. + + * The tests that involve running httpd leaked the system-wide + configuration in /etc/gitconfig to the tested environment. + + * "index-pack --keep=<msg>" was broken since v2.1.0 timeframe. + + * "git config --get-urlmatch", unlike other variants of the "git + config --get" family, did not signal error with its exit status + when there was no matching configuration. + + * The "--local-env-vars" and "--resolve-git-dir" options of "git + rev-parse" failed to work outside a repository when the command's + option parsing was rewritten in 1.8.5 era. + + * Fetching of history by naming a commit object name directly didn't + work across remote-curl transport. + + * A small memory leak in an error codepath has been plugged in xdiff + code. + + * strbuf_getwholeline() did not NUL-terminate the buffer on certain + corner cases in its error codepath. + + * The startup_info data, which records if we are working inside a + repository (among other things), are now uniformly available to Git + subcommand implementations, and Git avoids attempting to touch + references when we are not in a repository. + + * "git mergetool" did not work well with conflicts that both sides + deleted. + + * "git send-email" had trouble parsing alias file in mailrc format + when lines in it had trailing whitespaces on them. + + * When "git merge --squash" stopped due to conflict, the concluding + "git commit" failed to read in the SQUASH_MSG that shows the log + messages from all the squashed commits. + + * "git merge FETCH_HEAD" dereferenced NULL pointer when merging + nothing into an unborn history (which is arguably unusual usage, + which perhaps was the reason why nobody noticed it). + + * Build updates for MSVC. + + * "git diff -M" used to work better when two originally identical + files A and B got renamed to X/A and X/B by pairing A to X/A and B + to X/B, but this was broken in the 2.0 timeframe. + + * "git send-pack --all <there>" was broken when its command line + option parsing was written in the 2.6 timeframe. + + * When running "git blame $path" with unnormalized data in the index + for the path, the data in the working tree was blamed, even though + "git add" would not have changed what is already in the index, due + to "safe crlf" that disables the line-end conversion. It has been + corrected. + +Also contains minor documentation updates and code clean-ups. diff --git a/Documentation/RelNotes/2.8.3.txt b/Documentation/RelNotes/2.8.3.txt new file mode 100644 index 0000000..fedd996 --- /dev/null +++ b/Documentation/RelNotes/2.8.3.txt @@ -0,0 +1,101 @@ +Git v2.8.3 Release Notes +======================== + +Fixes since v2.8.2 +------------------ + + * "git send-email" now uses a more readable timestamps when + formulating a message ID. + + * The repository set-up sequence has been streamlined (the biggest + change is that there is no longer git_config_early()), so that we + do not attempt to look into refs/* when we know we do not have a + Git repository. + + * When "git worktree" feature is in use, "git branch -d" allowed + deletion of a branch that is checked out in another worktree + + * When "git worktree" feature is in use, "git branch -m" renamed a + branch that is checked out in another worktree without adjusting + the HEAD symbolic ref for the worktree. + + * "git format-patch --help" showed `-s` and `--no-patch` as if these + are valid options to the command. We already hide `--patch` option + from the documentation, because format-patch is about showing the + diff, and the documentation now hides these options as well. + + * A change back in version 2.7 to "git branch" broke display of a + symbolic ref in a non-standard place in the refs/ hierarchy (we + expect symbolic refs to appear in refs/remotes/*/HEAD to point at + the primary branch the remote has, and as .git/HEAD to point at the + branch we locally checked out). + + * A partial rewrite of "git submodule" in the 2.7 timeframe changed + the way the gitdir: pointer in the submodules point at the real + repository location to use absolute paths by accident. This has + been corrected. + + * "git commit" misbehaved in a few minor ways when an empty message + is given via -m '', all of which has been corrected. + + * Support for CRAM-MD5 authentication method in "git imap-send" did + not work well. + + * The socks5:// proxy support added back in 2.6.4 days was not aware + that socks5h:// proxies behave differently. + + * "git config" had a codepath that tried to pass a NULL to + printf("%s"), which nobody seems to have noticed. + + * On Cygwin, object creation uses the "create a temporary and then + rename it to the final name" pattern, not "create a temporary, + hardlink it to the final name and then unlink the temporary" + pattern. + + This is necessary to use Git on Windows shared directories, and is + already enabled for the MinGW and plain Windows builds. It also + has been used in Cygwin packaged versions of Git for quite a while. + See http://thread.gmane.org/gmane.comp.version-control.git/291853 + and http://thread.gmane.org/gmane.comp.version-control.git/275680. + + * "git replace -e" did not honour "core.editor" configuration. + + * Upcoming OpenSSL 1.1.0 will break compilation b updating a few APIs + we use in imap-send, which has been adjusted for the change. + + * "git submodule" reports the paths of submodules the command + recurses into, but this was incorrect when the command was not run + from the root level of the superproject. + + * The test scripts for "git p4" (but not "git p4" implementation + itself) has been updated so that they would work even on a system + where the installed version of Python is python 3. + + * The "user.useConfigOnly" configuration variable makes it an error + if users do not explicitly set user.name and user.email. However, + its check was not done early enough and allowed another error to + trigger, reporting that the default value we guessed from the + system setting was unusable. This was a suboptimal end-user + experience as we want the users to set user.name/user.email without + relying on the auto-detection at all. + + * "git mv old new" did not adjust the path for a submodule that lives + as a subdirectory inside old/ directory correctly. + + * "git push" from a corrupt repository that attempts to push a large + number of refs deadlocked; the thread to relay rejection notices + for these ref updates blocked on writing them to the main thread, + after the main thread at the receiving end notices that the push + failed and decides not to read these notices and return a failure. + + * A question by "git send-email" to ask the identity of the sender + has been updated. + + * Recent update to Git LFS broke "git p4" by changing the output from + its "lfs pointer" subcommand. + + * Some multi-byte encoding can have a backslash byte as a later part + of one letter, which would confuse "highlight" filter used in + gitweb. + +Also contains minor documentation updates and code clean-ups. diff --git a/Documentation/RelNotes/2.8.4.txt b/Documentation/RelNotes/2.8.4.txt new file mode 100644 index 0000000..f4e2552 --- /dev/null +++ b/Documentation/RelNotes/2.8.4.txt @@ -0,0 +1,69 @@ +Git v2.8.4 Release Notes +======================== + +Fixes since v2.8.3 +------------------ + + * Documentation for "git merge --verify-signatures" has been updated + to clarify that the signature of only the commit at the tip is + verified. Also the phrasing used for signature and key validity is + adjusted to align with that used by OpenPGP. + + * On Windows, .git and optionally any files whose name starts with a + dot are now marked as hidden, with a core.hideDotFiles knob to + customize this behaviour. + + * Portability enhancement for "rebase -i" to help platforms whose + shell does not like "for i in <empty>" (which is not POSIX-kosher). + + * "git fsck" learned to catch NUL byte in a commit object as + potential error and warn. + + * CI test was taught to build documentation pages. + + * Many 'linkgit:<git documentation page>' references were broken, + which are all fixed with this. + + * "git describe --contains" often made a hard-to-justify choice of + tag to give name to a given commit, because it tried to come up + with a name with smallest number of hops from a tag, causing an old + commit whose close descendant that is recently tagged were not + described with respect to an old tag but with a newer tag. It did + not help that its computation of "hop" count was further tweaked to + penalize being on a side branch of a merge. The logic has been + updated to favor using the tag with the oldest tagger date, which + is a lot easier to explain to the end users: "We describe a commit + in terms of the (chronologically) oldest tag that contains the + commit." + + * Running tests with '-x' option to trace the individual command + executions is a useful way to debug test scripts, but some tests + that capture the standard error stream and check what the command + said can be broken with the trace output mixed in. When running + our tests under "bash", however, we can redirect the trace output + to another file descriptor to keep the standard error of programs + being tested intact. + + * "http.cookieFile" configuration variable clearly wants a pathname, + but we forgot to treat it as such by e.g. applying tilde expansion. + + * When de-initialising all submodules, "git submodule deinit" gave a + faulty recommendation to use "git submodule deinit .", which would + result in a strange error message in a pathological corner case. + This has been corrected to suggest "submodule deinit --all" instead. + + * Many commands normalize command line arguments from NFD to NFC + variant of UTF-8 on OSX, but commands in the "diff" family did + not, causing "git diff $path" to complain that no such path is + known to Git. They have been taught to do the normalization. + + * A couple of bugs around core.autocrlf have been fixed. + + * "git difftool" learned to handle unmerged paths correctly in + dir-diff mode. + + * The "are we talking with TTY, doing an interactive session?" + detection has been updated to work better for "Git for Windows". + + +Also contains other minor documentation updates and code clean-ups. diff --git a/Documentation/SubmittingPatches b/Documentation/SubmittingPatches new file mode 100644 index 0000000..e8ad978 --- /dev/null +++ b/Documentation/SubmittingPatches @@ -0,0 +1,510 @@ +Here are some guidelines for people who want to contribute their code +to this software. + +(0) Decide what to base your work on. + +In general, always base your work on the oldest branch that your +change is relevant to. + + - A bugfix should be based on 'maint' in general. If the bug is not + present in 'maint', base it on 'master'. For a bug that's not yet + in 'master', find the topic that introduces the regression, and + base your work on the tip of the topic. + + - A new feature should be based on 'master' in general. If the new + feature depends on a topic that is in 'pu', but not in 'master', + base your work on the tip of that topic. + + - Corrections and enhancements to a topic not yet in 'master' should + be based on the tip of that topic. If the topic has not been merged + to 'next', it's alright to add a note to squash minor corrections + into the series. + + - In the exceptional case that a new feature depends on several topics + not in 'master', start working on 'next' or 'pu' privately and send + out patches for discussion. Before the final merge, you may have to + wait until some of the dependent topics graduate to 'master', and + rebase your work. + + - Some parts of the system have dedicated maintainers with their own + repositories (see the section "Subsystems" below). Changes to + these parts should be based on their trees. + +To find the tip of a topic branch, run "git log --first-parent +master..pu" and look for the merge commit. The second parent of this +commit is the tip of the topic branch. + +(1) Make separate commits for logically separate changes. + +Unless your patch is really trivial, you should not be sending +out a patch that was generated between your working tree and +your commit head. Instead, always make a commit with complete +commit message and generate a series of patches from your +repository. It is a good discipline. + +Give an explanation for the change(s) that is detailed enough so +that people can judge if it is good thing to do, without reading +the actual patch text to determine how well the code does what +the explanation promises to do. + +If your description starts to get too long, that's a sign that you +probably need to split up your commit to finer grained pieces. +That being said, patches which plainly describe the things that +help reviewers check the patch, and future maintainers understand +the code, are the most beautiful patches. Descriptions that summarise +the point in the subject well, and describe the motivation for the +change, the approach taken by the change, and if relevant how this +differs substantially from the prior version, are all good things +to have. + +Make sure that you have tests for the bug you are fixing. See +t/README for guidance. + +When adding a new feature, make sure that you have new tests to show +the feature triggers the new behavior when it should, and to show the +feature does not trigger when it shouldn't. After any code change, make +sure that the entire test suite passes. + +If you have an account at GitHub (and you can get one for free to work +on open source projects), you can use their Travis CI integration to +test your changes on Linux, Mac (and hopefully soon Windows). See +GitHub-Travis CI hints section for details. + +Do not forget to update the documentation to describe the updated +behavior and make sure that the resulting documentation set formats +well. It is currently a liberal mixture of US and UK English norms for +spelling and grammar, which is somewhat unfortunate. A huge patch that +touches the files all over the place only to correct the inconsistency +is not welcome, though. Potential clashes with other changes that can +result from such a patch are not worth it. We prefer to gradually +reconcile the inconsistencies in favor of US English, with small and +easily digestible patches, as a side effect of doing some other real +work in the vicinity (e.g. rewriting a paragraph for clarity, while +turning en_UK spelling to en_US). Obvious typographical fixes are much +more welcomed ("teh -> "the"), preferably submitted as independent +patches separate from other documentation changes. + +Oh, another thing. We are picky about whitespaces. Make sure your +changes do not trigger errors with the sample pre-commit hook shipped +in templates/hooks--pre-commit. To help ensure this does not happen, +run git diff --check on your changes before you commit. + + +(2) Describe your changes well. + +The first line of the commit message should be a short description (50 +characters is the soft limit, see DISCUSSION in git-commit(1)), and +should skip the full stop. It is also conventional in most cases to +prefix the first line with "area: " where the area is a filename or +identifier for the general area of the code being modified, e.g. + + . archive: ustar header checksum is computed unsigned + . git-cherry-pick.txt: clarify the use of revision range notation + +If in doubt which identifier to use, run "git log --no-merges" on the +files you are modifying to see the current conventions. + +The body should provide a meaningful commit message, which: + + . explains the problem the change tries to solve, iow, what is wrong + with the current code without the change. + + . justifies the way the change solves the problem, iow, why the + result with the change is better. + + . alternate solutions considered but discarded, if any. + +Describe your changes in imperative mood, e.g. "make xyzzy do frotz" +instead of "[This patch] makes xyzzy do frotz" or "[I] changed xyzzy +to do frotz", as if you are giving orders to the codebase to change +its behaviour. Try to make sure your explanation can be understood +without external resources. Instead of giving a URL to a mailing list +archive, summarize the relevant points of the discussion. + + +(3) Generate your patch using Git tools out of your commits. + +Git based diff tools generate unidiff which is the preferred format. + +You do not have to be afraid to use -M option to "git diff" or +"git format-patch", if your patch involves file renames. The +receiving end can handle them just fine. + +Please make sure your patch does not add commented out debugging code, +or include any extra files which do not relate to what your patch +is trying to achieve. Make sure to review +your patch after generating it, to ensure accuracy. Before +sending out, please make sure it cleanly applies to the "master" +branch head. If you are preparing a work based on "next" branch, +that is fine, but please mark it as such. + + +(4) Sending your patches. + +Learn to use format-patch and send-email if possible. These commands +are optimized for the workflow of sending patches, avoiding many ways +your existing e-mail client that is optimized for "multipart/*" mime +type e-mails to corrupt and render your patches unusable. + +People on the Git mailing list need to be able to read and +comment on the changes you are submitting. It is important for +a developer to be able to "quote" your changes, using standard +e-mail tools, so that they may comment on specific portions of +your code. For this reason, each patch should be submitted +"inline" in a separate message. + +Multiple related patches should be grouped into their own e-mail +thread to help readers find all parts of the series. To that end, +send them as replies to either an additional "cover letter" message +(see below), the first patch, or the respective preceding patch. + +If your log message (including your name on the +Signed-off-by line) is not writable in ASCII, make sure that +you send off a message in the correct encoding. + +WARNING: Be wary of your MUAs word-wrap +corrupting your patch. Do not cut-n-paste your patch; you can +lose tabs that way if you are not careful. + +It is a common convention to prefix your subject line with +[PATCH]. This lets people easily distinguish patches from other +e-mail discussions. Use of additional markers after PATCH and +the closing bracket to mark the nature of the patch is also +encouraged. E.g. [PATCH/RFC] is often used when the patch is +not ready to be applied but it is for discussion, [PATCH v2], +[PATCH v3] etc. are often seen when you are sending an update to +what you have previously sent. + +"git format-patch" command follows the best current practice to +format the body of an e-mail message. At the beginning of the +patch should come your commit message, ending with the +Signed-off-by: lines, and a line that consists of three dashes, +followed by the diffstat information and the patch itself. If +you are forwarding a patch from somebody else, optionally, at +the beginning of the e-mail message just before the commit +message starts, you can put a "From: " line to name that person. + +You often want to add additional explanation about the patch, +other than the commit message itself. Place such "cover letter" +material between the three-dash line and the diffstat. For +patches requiring multiple iterations of review and discussion, +an explanation of changes between each iteration can be kept in +Git-notes and inserted automatically following the three-dash +line via `git format-patch --notes`. + +Do not attach the patch as a MIME attachment, compressed or not. +Do not let your e-mail client send quoted-printable. Do not let +your e-mail client send format=flowed which would destroy +whitespaces in your patches. Many +popular e-mail applications will not always transmit a MIME +attachment as plain text, making it impossible to comment on +your code. A MIME attachment also takes a bit more time to +process. This does not decrease the likelihood of your +MIME-attached change being accepted, but it makes it more likely +that it will be postponed. + +Exception: If your mailer is mangling patches then someone may ask +you to re-send them using MIME, that is OK. + +Do not PGP sign your patch, at least for now. Most likely, your +maintainer or other people on the list would not have your PGP +key and would not bother obtaining it anyway. Your patch is not +judged by who you are; a good patch from an unknown origin has a +far better chance of being accepted than a patch from a known, +respected origin that is done poorly or does incorrect things. + +If you really really really really want to do a PGP signed +patch, format it as "multipart/signed", not a text/plain message +that starts with '-----BEGIN PGP SIGNED MESSAGE-----'. That is +not a text/plain, it's something else. + +Send your patch with "To:" set to the mailing list, with "cc:" listing +people who are involved in the area you are touching (the output from +"git blame $path" and "git shortlog --no-merges $path" would help to +identify them), to solicit comments and reviews. + +After the list reached a consensus that it is a good idea to apply the +patch, re-send it with "To:" set to the maintainer [*1*] and "cc:" the +list [*2*] for inclusion. + +Do not forget to add trailers such as "Acked-by:", "Reviewed-by:" and +"Tested-by:" lines as necessary to credit people who helped your +patch. + + [Addresses] + *1* The current maintainer: gitster@pobox.com + *2* The mailing list: git@vger.kernel.org + + +(5) Sign your work + +To improve tracking of who did what, we've borrowed the +"sign-off" procedure from the Linux kernel project on patches +that are being emailed around. Although core Git is a lot +smaller project it is a good discipline to follow it. + +The sign-off is a simple line at the end of the explanation for +the patch, which certifies that you wrote it or otherwise have +the right to pass it on as a open-source patch. The rules are +pretty simple: if you can certify the below: + + Developer's Certificate of Origin 1.1 + + By making a contribution to this project, I certify that: + + (a) The contribution was created in whole or in part by me and I + have the right to submit it under the open source license + indicated in the file; or + + (b) The contribution is based upon previous work that, to the best + of my knowledge, is covered under an appropriate open source + license and I have the right under that license to submit that + work with modifications, whether created in whole or in part + by me, under the same open source license (unless I am + permitted to submit under a different license), as indicated + in the file; or + + (c) The contribution was provided directly to me by some other + person who certified (a), (b) or (c) and I have not modified + it. + + (d) I understand and agree that this project and the contribution + are public and that a record of the contribution (including all + personal information I submit with it, including my sign-off) is + maintained indefinitely and may be redistributed consistent with + this project or the open source license(s) involved. + +then you just add a line saying + + Signed-off-by: Random J Developer <random@developer.example.org> + +This line can be automatically added by Git if you run the git-commit +command with the -s option. + +Notice that you can place your own Signed-off-by: line when +forwarding somebody else's patch with the above rules for +D-C-O. Indeed you are encouraged to do so. Do not forget to +place an in-body "From: " line at the beginning to properly attribute +the change to its true author (see (2) above). + +Also notice that a real name is used in the Signed-off-by: line. Please +don't hide your real name. + +If you like, you can put extra tags at the end: + +1. "Reported-by:" is used to credit someone who found the bug that + the patch attempts to fix. +2. "Acked-by:" says that the person who is more familiar with the area + the patch attempts to modify liked the patch. +3. "Reviewed-by:", unlike the other tags, can only be offered by the + reviewer and means that she is completely satisfied that the patch + is ready for application. It is usually offered only after a + detailed review. +4. "Tested-by:" is used to indicate that the person applied the patch + and found it to have the desired effect. + +You can also create your own tag or use one that's in common usage +such as "Thanks-to:", "Based-on-patch-by:", or "Mentored-by:". + +------------------------------------------------ +Subsystems with dedicated maintainers + +Some parts of the system have dedicated maintainers with their own +repositories. + + - git-gui/ comes from git-gui project, maintained by Pat Thoyts: + + git://repo.or.cz/git-gui.git + + - gitk-git/ comes from Paul Mackerras's gitk project: + + git://ozlabs.org/~paulus/gitk + + - po/ comes from the localization coordinator, Jiang Xin: + + https://github.com/git-l10n/git-po/ + +Patches to these parts should be based on their trees. + +------------------------------------------------ +An ideal patch flow + +Here is an ideal patch flow for this project the current maintainer +suggests to the contributors: + + (0) You come up with an itch. You code it up. + + (1) Send it to the list and cc people who may need to know about + the change. + + The people who may need to know are the ones whose code you + are butchering. These people happen to be the ones who are + most likely to be knowledgeable enough to help you, but + they have no obligation to help you (i.e. you ask for help, + don't demand). "git log -p -- $area_you_are_modifying" would + help you find out who they are. + + (2) You get comments and suggestions for improvements. You may + even get them in a "on top of your change" patch form. + + (3) Polish, refine, and re-send to the list and the people who + spend their time to improve your patch. Go back to step (2). + + (4) The list forms consensus that the last round of your patch is + good. Send it to the maintainer and cc the list. + + (5) A topic branch is created with the patch and is merged to 'next', + and cooked further and eventually graduates to 'master'. + +In any time between the (2)-(3) cycle, the maintainer may pick it up +from the list and queue it to 'pu', in order to make it easier for +people play with it without having to pick up and apply the patch to +their trees themselves. + +------------------------------------------------ +Know the status of your patch after submission + +* You can use Git itself to find out when your patch is merged in + master. 'git pull --rebase' will automatically skip already-applied + patches, and will let you know. This works only if you rebase on top + of the branch in which your patch has been merged (i.e. it will not + tell you if your patch is merged in pu if you rebase on top of + master). + +* Read the Git mailing list, the maintainer regularly posts messages + entitled "What's cooking in git.git" and "What's in git.git" giving + the status of various proposed changes. + +-------------------------------------------------- +GitHub-Travis CI hints + +With an account at GitHub (you can get one for free to work on open +source projects), you can use Travis CI to test your changes on Linux, +Mac (and hopefully soon Windows). You can find a successful example +test build here: https://travis-ci.org/git/git/builds/120473209 + +Follow these steps for the initial setup: + + (1) Fork https://github.com/git/git to your GitHub account. + You can find detailed instructions how to fork here: + https://help.github.com/articles/fork-a-repo/ + + (2) Open the Travis CI website: https://travis-ci.org + + (3) Press the "Sign in with GitHub" button. + + (4) Grant Travis CI permissions to access your GitHub account. + You can find more information about the required permissions here: + https://docs.travis-ci.com/user/github-oauth-scopes + + (5) Open your Travis CI profile page: https://travis-ci.org/profile + + (6) Enable Travis CI builds for your Git fork. + +After the initial setup, Travis CI will run whenever you push new changes +to your fork of Git on GitHub. You can monitor the test state of all your +branches here: https://travis-ci.org/<Your GitHub handle>/git/branches + +If a branch did not pass all test cases then it is marked with a red +cross. In that case you can click on the failing Travis CI job and +scroll all the way down in the log. Find the line "<-- Click here to see +detailed test output!" and click on the triangle next to the log line +number to expand the detailed test output. Here is such a failing +example: https://travis-ci.org/git/git/jobs/122676187 + +Fix the problem and push your fix to your Git fork. This will trigger +a new Travis CI build to ensure all tests pass. + + +------------------------------------------------ +MUA specific hints + +Some of patches I receive or pick up from the list share common +patterns of breakage. Please make sure your MUA is set up +properly not to corrupt whitespaces. + +See the DISCUSSION section of git-format-patch(1) for hints on +checking your patch by mailing it to yourself and applying with +git-am(1). + +While you are at it, check the resulting commit log message from +a trial run of applying the patch. If what is in the resulting +commit is not exactly what you would want to see, it is very +likely that your maintainer would end up hand editing the log +message when he applies your patch. Things like "Hi, this is my +first patch.\n", if you really want to put in the patch e-mail, +should come after the three-dash line that signals the end of the +commit message. + + +Pine +---- + +(Johannes Schindelin) + +I don't know how many people still use pine, but for those poor +souls it may be good to mention that the quell-flowed-text is +needed for recent versions. + +... the "no-strip-whitespace-before-send" option, too. AFAIK it +was introduced in 4.60. + +(Linus Torvalds) + +And 4.58 needs at least this. + +--- +diff-tree 8326dd8350be64ac7fc805f6563a1d61ad10d32c (from e886a61f76edf5410573e92e38ce22974f9c40f1) +Author: Linus Torvalds <torvalds@g5.osdl.org> +Date: Mon Aug 15 17:23:51 2005 -0700 + + Fix pine whitespace-corruption bug + + There's no excuse for unconditionally removing whitespace from + the pico buffers on close. + +diff --git a/pico/pico.c b/pico/pico.c +--- a/pico/pico.c ++++ b/pico/pico.c +@@ -219,7 +219,9 @@ PICO *pm; + switch(pico_all_done){ /* prepare for/handle final events */ + case COMP_EXIT : /* already confirmed */ + packheader(); ++#if 0 + stripwhitespace(); ++#endif + c |= COMP_EXIT; + break; + + +(Daniel Barkalow) + +> A patch to SubmittingPatches, MUA specific help section for +> users of Pine 4.63 would be very much appreciated. + +Ah, it looks like a recent version changed the default behavior to do the +right thing, and inverted the sense of the configuration option. (Either +that or Gentoo did it.) So you need to set the +"no-strip-whitespace-before-send" option, unless the option you have is +"strip-whitespace-before-send", in which case you should avoid checking +it. + + +Thunderbird, KMail, GMail +------------------------- + +See the MUA-SPECIFIC HINTS section of git-format-patch(1). + +Gnus +---- + +'|' in the *Summary* buffer can be used to pipe the current +message to an external program, and this is a handy way to drive +"git am". However, if the message is MIME encoded, what is +piped into the program is the representation you see in your +*Article* buffer after unwrapping MIME. This is often not what +you would want for two reasons. It tends to screw up non ASCII +characters (most notably in people's names), and also +whitespaces (fatal in patches). Running 'C-u g' to display the +message in raw form before using '|' to run the pipe can work +this problem around. diff --git a/Documentation/asciidoc.conf b/Documentation/asciidoc.conf new file mode 100644 index 0000000..2c16c53 --- /dev/null +++ b/Documentation/asciidoc.conf @@ -0,0 +1,97 @@ +## linkgit: macro +# +# Usage: linkgit:command[manpage-section] +# +# Note, {0} is the manpage section, while {target} is the command. +# +# Show Git link as: <command>(<section>); if section is defined, else just show +# the command. + +[macros] +(?su)[\\]?(?P<name>linkgit):(?P<target>\S*?)\[(?P<attrlist>.*?)\]= + +[attributes] +asterisk=* +plus=+ +caret=^ +startsb=[ +endsb=] +backslash=\ +tilde=~ +apostrophe=' +backtick=` +litdd=-- + +ifdef::backend-docbook[] +[linkgit-inlinemacro] +{0%{target}} +{0#<citerefentry>} +{0#<refentrytitle>{target}</refentrytitle><manvolnum>{0}</manvolnum>} +{0#</citerefentry>} +endif::backend-docbook[] + +ifdef::backend-docbook[] +ifndef::git-asciidoc-no-roff[] +# "unbreak" docbook-xsl v1.68 for manpages. v1.69 works with or without this. +# v1.72 breaks with this because it replaces dots not in roff requests. +[listingblock] +<example><title>{title}</title> +<literallayout class="monospaced"> +ifdef::doctype-manpage[] + .ft C +endif::doctype-manpage[] +| +ifdef::doctype-manpage[] + .ft +endif::doctype-manpage[] +</literallayout> +{title#}</example> +endif::git-asciidoc-no-roff[] + +ifdef::git-asciidoc-no-roff[] +ifdef::doctype-manpage[] +# The following two small workarounds insert a simple paragraph after screen +[listingblock] +<example><title>{title}</title> +<literallayout class="monospaced"> +| +</literallayout><simpara></simpara> +{title#}</example> + +[verseblock] +<formalpara{id? id="{id}"}><title>{title}</title><para> +{title%}<literallayout{id? id="{id}"}> +{title#}<literallayout> +| +</literallayout> +{title#}</para></formalpara> +{title%}<simpara></simpara> +endif::doctype-manpage[] +endif::git-asciidoc-no-roff[] +endif::backend-docbook[] + +ifdef::doctype-manpage[] +ifdef::backend-docbook[] +[header] +template::[header-declarations] +<refentry> +<refmeta> +<refentrytitle>{mantitle}</refentrytitle> +<manvolnum>{manvolnum}</manvolnum> +<refmiscinfo class="source">Git</refmiscinfo> +<refmiscinfo class="version">{git_version}</refmiscinfo> +<refmiscinfo class="manual">Git Manual</refmiscinfo> +</refmeta> +<refnamediv> + <refname>{manname}</refname> + <refpurpose>{manpurpose}</refpurpose> +</refnamediv> +endif::backend-docbook[] +endif::doctype-manpage[] + +ifdef::backend-xhtml11[] +[attributes] +git-relative-html-prefix= +[linkgit-inlinemacro] +<a href="{git-relative-html-prefix}{target}.html">{target}{0?({0})}</a> +endif::backend-xhtml11[] diff --git a/Documentation/blame-options.txt b/Documentation/blame-options.txt new file mode 100644 index 0000000..02cb684 --- /dev/null +++ b/Documentation/blame-options.txt @@ -0,0 +1,113 @@ +-b:: + Show blank SHA-1 for boundary commits. This can also + be controlled via the `blame.blankboundary` config option. + +--root:: + Do not treat root commits as boundaries. This can also be + controlled via the `blame.showRoot` config option. + +--show-stats:: + Include additional statistics at the end of blame output. + +-L <start>,<end>:: +-L :<funcname>:: + Annotate only the given line range. May be specified multiple times. + Overlapping ranges are allowed. ++ +<start> and <end> are optional. ``-L <start>'' or ``-L <start>,'' spans from +<start> to end of file. ``-L ,<end>'' spans from start of file to <end>. ++ +include::line-range-format.txt[] + +-l:: + Show long rev (Default: off). + +-t:: + Show raw timestamp (Default: off). + +-S <revs-file>:: + Use revisions from revs-file instead of calling linkgit:git-rev-list[1]. + +--reverse:: + Walk history forward instead of backward. Instead of showing + the revision in which a line appeared, this shows the last + revision in which a line has existed. This requires a range of + revision like START..END where the path to blame exists in + START. + +-p:: +--porcelain:: + Show in a format designed for machine consumption. + +--line-porcelain:: + Show the porcelain format, but output commit information for + each line, not just the first time a commit is referenced. + Implies --porcelain. + +--incremental:: + Show the result incrementally in a format designed for + machine consumption. + +--encoding=<encoding>:: + Specifies the encoding used to output author names + and commit summaries. Setting it to `none` makes blame + output unconverted data. For more information see the + discussion about encoding in the linkgit:git-log[1] + manual page. + +--contents <file>:: + When <rev> is not specified, the command annotates the + changes starting backwards from the working tree copy. + This flag makes the command pretend as if the working + tree copy has the contents of the named file (specify + `-` to make the command read from the standard input). + +--date <format>:: + Specifies the format used to output dates. If --date is not + provided, the value of the blame.date config variable is + used. If the blame.date config variable is also not set, the + iso format is used. For supported values, see the discussion + of the --date option at linkgit:git-log[1]. + +--[no-]progress:: + Progress status is reported on the standard error stream + by default when it is attached to a terminal. This flag + enables progress reporting even if not attached to a + terminal. Can't use `--progress` together with `--porcelain` + or `--incremental`. + +-M|<num>|:: + Detect moved or copied lines within a file. When a commit + moves or copies a block of lines (e.g. the original file + has A and then B, and the commit changes it to B and then + A), the traditional 'blame' algorithm notices only half of + the movement and typically blames the lines that were moved + up (i.e. B) to the parent and assigns blame to the lines that + were moved down (i.e. A) to the child commit. With this + option, both groups of lines are blamed on the parent by + running extra passes of inspection. ++ +<num> is optional but it is the lower bound on the number of +alphanumeric characters that Git must detect as moving/copying +within a file for it to associate those lines with the parent +commit. The default value is 20. + +-C|<num>|:: + In addition to `-M`, detect lines moved or copied from other + files that were modified in the same commit. This is + useful when you reorganize your program and move code + around across files. When this option is given twice, + the command additionally looks for copies from other + files in the commit that creates the file. When this + option is given three times, the command additionally + looks for copies from other files in any commit. ++ +<num> is optional but it is the lower bound on the number of +alphanumeric characters that Git must detect as moving/copying +between files for it to associate those lines with the parent +commit. And the default value is 40. If there are more than one +`-C` options given, the <num> argument of the last `-C` will +take effect. + +-h:: + Show help message. diff --git a/Documentation/build-docdep.perl b/Documentation/build-docdep.perl new file mode 100755 index 0000000..ba4205e --- /dev/null +++ b/Documentation/build-docdep.perl @@ -0,0 +1,46 @@ +#!/usr/bin/perl + +my %include = (); +my %included = (); + +for my $text (<*.txt>) { + open I, '<', $text || die "cannot read: $text"; + while (<I>) { + if (/^include::/) { + chomp; + s/^include::\s*//; + s/\[\]//; + $include{$text}{$_} = 1; + $included{$_} = 1; + } + } + close I; +} + +# Do we care about chained includes??? +my $changed = 1; +while ($changed) { + $changed = 0; + while (my ($text, $included) = each %include) { + for my $i (keys %$included) { + # $text has include::$i; if $i includes $j + # $text indirectly includes $j. + if (exists $include{$i}) { + for my $j (keys %{$include{$i}}) { + if (!exists $include{$text}{$j}) { + $include{$text}{$j} = 1; + $included{$j} = 1; + $changed = 1; + } + } + } + } + } +} + +while (my ($text, $included) = each %include) { + if (! exists $included{$text} && + (my $base = $text) =~ s/\.txt$//) { + print "$base.html $base.xml : ", join(" ", keys %$included), "\n"; + } +} diff --git a/Documentation/cat-texi.perl b/Documentation/cat-texi.perl new file mode 100755 index 0000000..87437f8 --- /dev/null +++ b/Documentation/cat-texi.perl @@ -0,0 +1,43 @@ +#!/usr/bin/perl -w + +my @menu = (); +my $output = $ARGV[0]; + +open TMP, '>', "$output.tmp"; + +while (<STDIN>) { + next if (/^\\input texinfo/../\@node Top/); + next if (/^\@bye/ || /^\.ft/); + if (s/^\@top (.*)/\@node $1,,,Top/) { + push @menu, $1; + } + s/\(\@pxref{\[(URLS|REMOTES)\]}\)//; + s/\@anchor\{[^{}]*\}//g; + print TMP; +} +close TMP; + +printf '\input texinfo +@setfilename gitman.info +@documentencoding UTF-8 +@dircategory Development +@direntry +* Git Man Pages: (gitman). Manual pages for Git revision control system +@end direntry +@node Top,,, (dir) +@top Git Manual Pages +@documentlanguage en +@menu +', $menu[0]; + +for (@menu) { + print "* ${_}::\n"; +} +print "\@end menu\n"; +open TMP, '<', "$output.tmp"; +while (<TMP>) { + print; +} +close TMP; +print "\@bye\n"; +unlink "$output.tmp"; diff --git a/Documentation/cmd-list.perl b/Documentation/cmd-list.perl new file mode 100755 index 0000000..5aa73cf --- /dev/null +++ b/Documentation/cmd-list.perl @@ -0,0 +1,78 @@ +#!/usr/bin/perl -w + +use File::Compare qw(compare); + +sub format_one { + my ($out, $nameattr) = @_; + my ($name, $attr) = @$nameattr; + my ($state, $description); + $state = 0; + open I, '<', "$name.txt" or die "No such file $name.txt"; + while (<I>) { + if (/^NAME$/) { + $state = 1; + next; + } + if ($state == 1 && /^----$/) { + $state = 2; + next; + } + next if ($state != 2); + chomp; + $description = $_; + last; + } + close I; + if (!defined $description) { + die "No description found in $name.txt"; + } + if (my ($verify_name, $text) = ($description =~ /^($name) - (.*)/)) { + print $out "linkgit:$name\[1\]::\n\t"; + if ($attr =~ / deprecated /) { + print $out "(deprecated) "; + } + print $out "$text.\n\n"; + } + else { + die "Description does not match $name: $description"; + } +} + +while (<>) { + last if /^### command list/; +} + +my %cmds = (); +for (sort <>) { + next if /^#/; + + chomp; + my ($name, $cat, $attr) = /^(\S+)\s+(.*?)(?:\s+(.*))?$/; + $attr = '' unless defined $attr; + push @{$cmds{$cat}}, [$name, " $attr "]; +} + +for my $cat (qw(ancillaryinterrogators + ancillarymanipulators + mainporcelain + plumbinginterrogators + plumbingmanipulators + synchingrepositories + foreignscminterface + purehelpers + synchelpers)) { + my $out = "cmds-$cat.txt"; + open O, '>', "$out+" or die "Cannot open output file $out+"; + for (@{$cmds{$cat}}) { + format_one(\*O, $_); + } + close O; + + if (-f "$out" && compare("$out", "$out+") == 0) { + unlink "$out+"; + } + else { + print STDERR "$out\n"; + rename "$out+", "$out"; + } +} diff --git a/Documentation/config.txt b/Documentation/config.txt new file mode 100644 index 0000000..0269620 --- /dev/null +++ b/Documentation/config.txt @@ -0,0 +1,2898 @@ +CONFIGURATION FILE +------------------ + +The Git configuration file contains a number of variables that affect +the Git commands' behavior. The `.git/config` file in each repository +is used to store the configuration for that repository, and +`$HOME/.gitconfig` is used to store a per-user configuration as +fallback values for the `.git/config` file. The file `/etc/gitconfig` +can be used to store a system-wide default configuration. + +The configuration variables are used by both the Git plumbing +and the porcelains. The variables are divided into sections, wherein +the fully qualified variable name of the variable itself is the last +dot-separated segment and the section name is everything before the last +dot. The variable names are case-insensitive, allow only alphanumeric +characters and `-`, and must start with an alphabetic character. Some +variables may appear multiple times; we say then that the variable is +multivalued. + +Syntax +~~~~~~ + +The syntax is fairly flexible and permissive; whitespaces are mostly +ignored. The '#' and ';' characters begin comments to the end of line, +blank lines are ignored. + +The file consists of sections and variables. A section begins with +the name of the section in square brackets and continues until the next +section begins. Section names are case-insensitive. Only alphanumeric +characters, `-` and `.` are allowed in section names. Each variable +must belong to some section, which means that there must be a section +header before the first setting of a variable. + +Sections can be further divided into subsections. To begin a subsection +put its name in double quotes, separated by space from the section name, +in the section header, like in the example below: + +-------- + [section "subsection"] + +-------- + +Subsection names are case sensitive and can contain any characters except +newline (doublequote `"` and backslash can be included by escaping them +as `\"` and `\\`, respectively). Section headers cannot span multiple +lines. Variables may belong directly to a section or to a given subsection. +You can have `[section]` if you have `[section "subsection"]`, but you +don't need to. + +There is also a deprecated `[section.subsection]` syntax. With this +syntax, the subsection name is converted to lower-case and is also +compared case sensitively. These subsection names follow the same +restrictions as section names. + +All the other lines (and the remainder of the line after the section +header) are recognized as setting variables, in the form +'name = value' (or just 'name', which is a short-hand to say that +the variable is the boolean "true"). +The variable names are case-insensitive, allow only alphanumeric characters +and `-`, and must start with an alphabetic character. + +A line that defines a value can be continued to the next line by +ending it with a `\`; the backquote and the end-of-line are +stripped. Leading whitespaces after 'name =', the remainder of the +line after the first comment character '#' or ';', and trailing +whitespaces of the line are discarded unless they are enclosed in +double quotes. Internal whitespaces within the value are retained +verbatim. + +Inside double quotes, double quote `"` and backslash `\` characters +must be escaped: use `\"` for `"` and `\\` for `\`. + +The following escape sequences (beside `\"` and `\\`) are recognized: +`\n` for newline character (NL), `\t` for horizontal tabulation (HT, TAB) +and `\b` for backspace (BS). Other char escape sequences (including octal +escape sequences) are invalid. + + +Includes +~~~~~~~~ + +You can include one config file from another by setting the special +`include.path` variable to the name of the file to be included. The +variable takes a pathname as its value, and is subject to tilde +expansion. + +The +included file is expanded immediately, as if its contents had been +found at the location of the include directive. If the value of the +`include.path` variable is a relative path, the path is considered to be +relative to the configuration file in which the include directive was +found. See below for examples. + + +Example +~~~~~~~ + + # Core variables + [core] + ; Don't trust file modes + filemode = false + + # Our diff algorithm + [diff] + external = /usr/local/bin/diff-wrapper + renames = true + + [branch "devel"] + remote = origin + merge = refs/heads/devel + + # Proxy settings + [core] + gitProxy="ssh" for "kernel.org" + gitProxy=default-proxy ; for the rest + + [include] + path = /path/to/foo.inc ; include by absolute path + path = foo ; expand "foo" relative to the current file + path = ~/foo ; expand "foo" in your `$HOME` directory + + +Values +~~~~~~ + +Values of many variables are treated as a simple string, but there +are variables that take values of specific types and there are rules +as to how to spell them. + +boolean:: + + When a variable is said to take a boolean value, many + synonyms are accepted for 'true' and 'false'; these are all + case-insensitive. + + true;; Boolean true can be spelled as `yes`, `on`, `true`, + or `1`. Also, a variable defined without `= <value>` + is taken as true. + + false;; Boolean false can be spelled as `no`, `off`, + `false`, or `0`. ++ +When converting value to the canonical form using '--bool' type +specifier; 'git config' will ensure that the output is "true" or +"false" (spelled in lowercase). + +integer:: + The value for many variables that specify various sizes can + be suffixed with `k`, `M`,... to mean "scale the number by + 1024", "by 1024x1024", etc. + +color:: + The value for a variables that takes a color is a list of + colors (at most two) and attributes (at most one), separated + by spaces. The colors accepted are `normal`, `black`, + `red`, `green`, `yellow`, `blue`, `magenta`, `cyan` and + `white`; the attributes are `bold`, `dim`, `ul`, `blink` and + `reverse`. The first color given is the foreground; the + second is the background. The position of the attribute, if + any, doesn't matter. Attributes may be turned off specifically + by prefixing them with `no` (e.g., `noreverse`, `noul`, etc). ++ +Colors (foreground and background) may also be given as numbers between +0 and 255; these use ANSI 256-color mode (but note that not all +terminals may support this). If your terminal supports it, you may also +specify 24-bit RGB values as hex, like `#ff0ab3`. ++ +The attributes are meant to be reset at the beginning of each item +in the colored output, so setting color.decorate.branch to `black` +will paint that branch name in a plain `black`, even if the previous +thing on the same output line (e.g. opening parenthesis before the +list of branch names in `log --decorate` output) is set to be +painted with `bold` or some other attribute. + +pathname:: + A variable that takes a pathname value can be given a + string that begins with "`~/`" or "`~user/`", and the usual + tilde expansion happens to such a string: `~/` + is expanded to the value of `$HOME`, and `~user/` to the + specified user's home directory. + + +Variables +~~~~~~~~~ + +Note that this list is non-comprehensive and not necessarily complete. +For command-specific variables, you will find a more detailed description +in the appropriate manual page. + +Other git-related tools may and do use their own variables. When +inventing new variables for use in your own tool, make sure their +names do not conflict with those that are used by Git itself and +other popular tools, and describe them in your documentation. + + +advice.*:: + These variables control various optional help messages designed to + aid new users. All 'advice.*' variables default to 'true', and you + can tell Git that you do not need help by setting these to 'false': ++ +-- + pushUpdateRejected:: + Set this variable to 'false' if you want to disable + 'pushNonFFCurrent', + 'pushNonFFMatching', 'pushAlreadyExists', + 'pushFetchFirst', and 'pushNeedsForce' + simultaneously. + pushNonFFCurrent:: + Advice shown when linkgit:git-push[1] fails due to a + non-fast-forward update to the current branch. + pushNonFFMatching:: + Advice shown when you ran linkgit:git-push[1] and pushed + 'matching refs' explicitly (i.e. you used ':', or + specified a refspec that isn't your current branch) and + it resulted in a non-fast-forward error. + pushAlreadyExists:: + Shown when linkgit:git-push[1] rejects an update that + does not qualify for fast-forwarding (e.g., a tag.) + pushFetchFirst:: + Shown when linkgit:git-push[1] rejects an update that + tries to overwrite a remote ref that points at an + object we do not have. + pushNeedsForce:: + Shown when linkgit:git-push[1] rejects an update that + tries to overwrite a remote ref that points at an + object that is not a commit-ish, or make the remote + ref point at an object that is not a commit-ish. + statusHints:: + Show directions on how to proceed from the current + state in the output of linkgit:git-status[1], in + the template shown when writing commit messages in + linkgit:git-commit[1], and in the help message shown + by linkgit:git-checkout[1] when switching branch. + statusUoption:: + Advise to consider using the `-u` option to linkgit:git-status[1] + when the command takes more than 2 seconds to enumerate untracked + files. + commitBeforeMerge:: + Advice shown when linkgit:git-merge[1] refuses to + merge to avoid overwriting local changes. + resolveConflict:: + Advice shown by various commands when conflicts + prevent the operation from being performed. + implicitIdentity:: + Advice on how to set your identity configuration when + your information is guessed from the system username and + domain name. + detachedHead:: + Advice shown when you used linkgit:git-checkout[1] to + move to the detach HEAD state, to instruct how to create + a local branch after the fact. + amWorkDir:: + Advice that shows the location of the patch file when + linkgit:git-am[1] fails to apply it. + rmHints:: + In case of failure in the output of linkgit:git-rm[1], + show directions on how to proceed from the current state. +-- + +core.fileMode:: + Tells Git if the executable bit of files in the working tree + is to be honored. ++ +Some filesystems lose the executable bit when a file that is +marked as executable is checked out, or checks out an +non-executable file with executable bit on. +linkgit:git-clone[1] or linkgit:git-init[1] probe the filesystem +to see if it handles the executable bit correctly +and this variable is automatically set as necessary. ++ +A repository, however, may be on a filesystem that handles +the filemode correctly, and this variable is set to 'true' +when created, but later may be made accessible from another +environment that loses the filemode (e.g. exporting ext4 via +CIFS mount, visiting a Cygwin created repository with +Git for Windows or Eclipse). +In such a case it may be necessary to set this variable to 'false'. +See linkgit:git-update-index[1]. ++ +The default is true (when core.filemode is not specified in the config file). + +core.hideDotFiles:: + (Windows-only) If true, mark newly-created directories and files whose + name starts with a dot as hidden. If 'dotGitOnly', only the `.git/` + directory is hidden, but no other files starting with a dot. The + default mode is 'dotGitOnly'. + +core.ignoreCase:: + If true, this option enables various workarounds to enable + Git to work better on filesystems that are not case sensitive, + like FAT. For example, if a directory listing finds + "makefile" when Git expects "Makefile", Git will assume + it is really the same file, and continue to remember it as + "Makefile". ++ +The default is false, except linkgit:git-clone[1] or linkgit:git-init[1] +will probe and set core.ignoreCase true if appropriate when the repository +is created. + +core.precomposeUnicode:: + This option is only used by Mac OS implementation of Git. + When core.precomposeUnicode=true, Git reverts the unicode decomposition + of filenames done by Mac OS. This is useful when sharing a repository + between Mac OS and Linux or Windows. + (Git for Windows 1.7.10 or higher is needed, or Git under cygwin 1.7). + When false, file names are handled fully transparent by Git, + which is backward compatible with older versions of Git. + +core.protectHFS:: + If set to true, do not allow checkout of paths that would + be considered equivalent to `.git` on an HFS+ filesystem. + Defaults to `true` on Mac OS, and `false` elsewhere. + +core.protectNTFS:: + If set to true, do not allow checkout of paths that would + cause problems with the NTFS filesystem, e.g. conflict with + 8.3 "short" names. + Defaults to `true` on Windows, and `false` elsewhere. + +core.trustctime:: + If false, the ctime differences between the index and the + working tree are ignored; useful when the inode change time + is regularly modified by something outside Git (file system + crawlers and some backup systems). + See linkgit:git-update-index[1]. True by default. + +core.untrackedCache:: + Determines what to do about the untracked cache feature of the + index. It will be kept, if this variable is unset or set to + `keep`. It will automatically be added if set to `true`. And + it will automatically be removed, if set to `false`. Before + setting it to `true`, you should check that mtime is working + properly on your system. + See linkgit:git-update-index[1]. `keep` by default. + +core.checkStat:: + Determines which stat fields to match between the index + and work tree. The user can set this to 'default' or + 'minimal'. Default (or explicitly 'default'), is to check + all fields, including the sub-second part of mtime and ctime. + +core.quotePath:: + The commands that output paths (e.g. 'ls-files', + 'diff'), when not given the `-z` option, will quote + "unusual" characters in the pathname by enclosing the + pathname in a double-quote pair and with backslashes the + same way strings in C source code are quoted. If this + variable is set to false, the bytes higher than 0x80 are + not quoted but output as verbatim. Note that double + quote, backslash and control characters are always + quoted without `-z` regardless of the setting of this + variable. + +core.eol:: + Sets the line ending type to use in the working directory for + files that have the `text` property set when core.autocrlf is false. + Alternatives are 'lf', 'crlf' and 'native', which uses the platform's + native line ending. The default value is `native`. See + linkgit:gitattributes[5] for more information on end-of-line + conversion. + +core.safecrlf:: + If true, makes Git check if converting `CRLF` is reversible when + end-of-line conversion is active. Git will verify if a command + modifies a file in the work tree either directly or indirectly. + For example, committing a file followed by checking out the + same file should yield the original file in the work tree. If + this is not the case for the current setting of + `core.autocrlf`, Git will reject the file. The variable can + be set to "warn", in which case Git will only warn about an + irreversible conversion but continue the operation. ++ +CRLF conversion bears a slight chance of corrupting data. +When it is enabled, Git will convert CRLF to LF during commit and LF to +CRLF during checkout. A file that contains a mixture of LF and +CRLF before the commit cannot be recreated by Git. For text +files this is the right thing to do: it corrects line endings +such that we have only LF line endings in the repository. +But for binary files that are accidentally classified as text the +conversion can corrupt data. ++ +If you recognize such corruption early you can easily fix it by +setting the conversion type explicitly in .gitattributes. Right +after committing you still have the original file in your work +tree and this file is not yet corrupted. You can explicitly tell +Git that this file is binary and Git will handle the file +appropriately. ++ +Unfortunately, the desired effect of cleaning up text files with +mixed line endings and the undesired effect of corrupting binary +files cannot be distinguished. In both cases CRLFs are removed +in an irreversible way. For text files this is the right thing +to do because CRLFs are line endings, while for binary files +converting CRLFs corrupts data. ++ +Note, this safety check does not mean that a checkout will generate a +file identical to the original file for a different setting of +`core.eol` and `core.autocrlf`, but only for the current one. For +example, a text file with `LF` would be accepted with `core.eol=lf` +and could later be checked out with `core.eol=crlf`, in which case the +resulting file would contain `CRLF`, although the original file +contained `LF`. However, in both work trees the line endings would be +consistent, that is either all `LF` or all `CRLF`, but never mixed. A +file with mixed line endings would be reported by the `core.safecrlf` +mechanism. + +core.autocrlf:: + Setting this variable to "true" is almost the same as setting + the `text` attribute to "auto" on all files except that text + files are not guaranteed to be normalized: files that contain + `CRLF` in the repository will not be touched. Use this + setting if you want to have `CRLF` line endings in your + working directory even though the repository does not have + normalized line endings. This variable can be set to 'input', + in which case no output conversion is performed. + +core.symlinks:: + If false, symbolic links are checked out as small plain files that + contain the link text. linkgit:git-update-index[1] and + linkgit:git-add[1] will not change the recorded type to regular + file. Useful on filesystems like FAT that do not support + symbolic links. ++ +The default is true, except linkgit:git-clone[1] or linkgit:git-init[1] +will probe and set core.symlinks false if appropriate when the repository +is created. + +core.gitProxy:: + A "proxy command" to execute (as 'command host port') instead + of establishing direct connection to the remote server when + using the Git protocol for fetching. If the variable value is + in the "COMMAND for DOMAIN" format, the command is applied only + on hostnames ending with the specified domain string. This variable + may be set multiple times and is matched in the given order; + the first match wins. ++ +Can be overridden by the 'GIT_PROXY_COMMAND' environment variable +(which always applies universally, without the special "for" +handling). ++ +The special string `none` can be used as the proxy command to +specify that no proxy be used for a given domain pattern. +This is useful for excluding servers inside a firewall from +proxy use, while defaulting to a common proxy for external domains. + +core.ignoreStat:: + If true, Git will avoid using lstat() calls to detect if files have + changed by setting the "assume-unchanged" bit for those tracked files + which it has updated identically in both the index and working tree. ++ +When files are modified outside of Git, the user will need to stage +the modified files explicitly (e.g. see 'Examples' section in +linkgit:git-update-index[1]). +Git will not normally detect changes to those files. ++ +This is useful on systems where lstat() calls are very slow, such as +CIFS/Microsoft Windows. ++ +False by default. + +core.preferSymlinkRefs:: + Instead of the default "symref" format for HEAD + and other symbolic reference files, use symbolic links. + This is sometimes needed to work with old scripts that + expect HEAD to be a symbolic link. + +core.bare:: + If true this repository is assumed to be 'bare' and has no + working directory associated with it. If this is the case a + number of commands that require a working directory will be + disabled, such as linkgit:git-add[1] or linkgit:git-merge[1]. ++ +This setting is automatically guessed by linkgit:git-clone[1] or +linkgit:git-init[1] when the repository was created. By default a +repository that ends in "/.git" is assumed to be not bare (bare = +false), while all other repositories are assumed to be bare (bare += true). + +core.worktree:: + Set the path to the root of the working tree. + If GIT_COMMON_DIR environment variable is set, core.worktree + is ignored and not used for determining the root of working tree. + This can be overridden by the GIT_WORK_TREE environment + variable and the '--work-tree' command-line option. + The value can be an absolute path or relative to the path to + the .git directory, which is either specified by --git-dir + or GIT_DIR, or automatically discovered. + If --git-dir or GIT_DIR is specified but none of + --work-tree, GIT_WORK_TREE and core.worktree is specified, + the current working directory is regarded as the top level + of your working tree. ++ +Note that this variable is honored even when set in a configuration +file in a ".git" subdirectory of a directory and its value differs +from the latter directory (e.g. "/path/to/.git/config" has +core.worktree set to "/different/path"), which is most likely a +misconfiguration. Running Git commands in the "/path/to" directory will +still use "/different/path" as the root of the work tree and can cause +confusion unless you know what you are doing (e.g. you are creating a +read-only snapshot of the same index to a location different from the +repository's usual working tree). + +core.logAllRefUpdates:: + Enable the reflog. Updates to a ref <ref> is logged to the file + "`$GIT_DIR/logs/<ref>`", by appending the new and old + SHA-1, the date/time and the reason of the update, but + only when the file exists. If this configuration + variable is set to true, missing "`$GIT_DIR/logs/<ref>`" + file is automatically created for branch heads (i.e. under + refs/heads/), remote refs (i.e. under refs/remotes/), + note refs (i.e. under refs/notes/), and the symbolic ref HEAD. ++ +This information can be used to determine what commit +was the tip of a branch "2 days ago". ++ +This value is true by default in a repository that has +a working directory associated with it, and false by +default in a bare repository. + +core.repositoryFormatVersion:: + Internal variable identifying the repository format and layout + version. + +core.sharedRepository:: + When 'group' (or 'true'), the repository is made shareable between + several users in a group (making sure all the files and objects are + group-writable). When 'all' (or 'world' or 'everybody'), the + repository will be readable by all users, additionally to being + group-shareable. When 'umask' (or 'false'), Git will use permissions + reported by umask(2). When '0xxx', where '0xxx' is an octal number, + files in the repository will have this mode value. '0xxx' will override + user's umask value (whereas the other options will only override + requested parts of the user's umask value). Examples: '0660' will make + the repo read/write-able for the owner and group, but inaccessible to + others (equivalent to 'group' unless umask is e.g. '0022'). '0640' is a + repository that is group-readable but not group-writable. + See linkgit:git-init[1]. False by default. + +core.warnAmbiguousRefs:: + If true, Git will warn you if the ref name you passed it is ambiguous + and might match multiple refs in the repository. True by default. + +core.compression:: + An integer -1..9, indicating a default compression level. + -1 is the zlib default. 0 means no compression, + and 1..9 are various speed/size tradeoffs, 9 being slowest. + If set, this provides a default to other compression variables, + such as 'core.looseCompression' and 'pack.compression'. + +core.looseCompression:: + An integer -1..9, indicating the compression level for objects that + are not in a pack file. -1 is the zlib default. 0 means no + compression, and 1..9 are various speed/size tradeoffs, 9 being + slowest. If not set, defaults to core.compression. If that is + not set, defaults to 1 (best speed). + +core.packedGitWindowSize:: + Number of bytes of a pack file to map into memory in a + single mapping operation. Larger window sizes may allow + your system to process a smaller number of large pack files + more quickly. Smaller window sizes will negatively affect + performance due to increased calls to the operating system's + memory manager, but may improve performance when accessing + a large number of large pack files. ++ +Default is 1 MiB if NO_MMAP was set at compile time, otherwise 32 +MiB on 32 bit platforms and 1 GiB on 64 bit platforms. This should +be reasonable for all users/operating systems. You probably do +not need to adjust this value. ++ +Common unit suffixes of 'k', 'm', or 'g' are supported. + +core.packedGitLimit:: + Maximum number of bytes to map simultaneously into memory + from pack files. If Git needs to access more than this many + bytes at once to complete an operation it will unmap existing + regions to reclaim virtual address space within the process. ++ +Default is 256 MiB on 32 bit platforms and 8 GiB on 64 bit platforms. +This should be reasonable for all users/operating systems, except on +the largest projects. You probably do not need to adjust this value. ++ +Common unit suffixes of 'k', 'm', or 'g' are supported. + +core.deltaBaseCacheLimit:: + Maximum number of bytes to reserve for caching base objects + that may be referenced by multiple deltified objects. By storing the + entire decompressed base objects in a cache Git is able + to avoid unpacking and decompressing frequently used base + objects multiple times. ++ +Default is 96 MiB on all platforms. This should be reasonable +for all users/operating systems, except on the largest projects. +You probably do not need to adjust this value. ++ +Common unit suffixes of 'k', 'm', or 'g' are supported. + +core.bigFileThreshold:: + Files larger than this size are stored deflated, without + attempting delta compression. Storing large files without + delta compression avoids excessive memory usage, at the + slight expense of increased disk usage. Additionally files + larger than this size are always treated as binary. ++ +Default is 512 MiB on all platforms. This should be reasonable +for most projects as source code and other text files can still +be delta compressed, but larger binary media files won't be. ++ +Common unit suffixes of 'k', 'm', or 'g' are supported. + +core.excludesFile:: + Specifies the pathname to the file that contains patterns to + describe paths that are not meant to be tracked, in addition + to '.gitignore' (per-directory) and '.git/info/exclude'. + Defaults to `$XDG_CONFIG_HOME/git/ignore`. + If `$XDG_CONFIG_HOME` is either not set or empty, `$HOME/.config/git/ignore` + is used instead. See linkgit:gitignore[5]. + +core.askPass:: + Some commands (e.g. svn and http interfaces) that interactively + ask for a password can be told to use an external program given + via the value of this variable. Can be overridden by the 'GIT_ASKPASS' + environment variable. If not set, fall back to the value of the + 'SSH_ASKPASS' environment variable or, failing that, a simple password + prompt. The external program shall be given a suitable prompt as + command-line argument and write the password on its STDOUT. + +core.attributesFile:: + In addition to '.gitattributes' (per-directory) and + '.git/info/attributes', Git looks into this file for attributes + (see linkgit:gitattributes[5]). Path expansions are made the same + way as for `core.excludesFile`. Its default value is + `$XDG_CONFIG_HOME/git/attributes`. If `$XDG_CONFIG_HOME` is either not + set or empty, `$HOME/.config/git/attributes` is used instead. + +core.editor:: + Commands such as `commit` and `tag` that lets you edit + messages by launching an editor uses the value of this + variable when it is set, and the environment variable + `GIT_EDITOR` is not set. See linkgit:git-var[1]. + +core.commentChar:: + Commands such as `commit` and `tag` that lets you edit + messages consider a line that begins with this character + commented, and removes them after the editor returns + (default '#'). ++ +If set to "auto", `git-commit` would select a character that is not +the beginning character of any line in existing commit messages. + +core.packedRefsTimeout:: + The length of time, in milliseconds, to retry when trying to + lock the `packed-refs` file. Value 0 means not to retry at + all; -1 means to try indefinitely. Default is 1000 (i.e., + retry for 1 second). + +sequence.editor:: + Text editor used by `git rebase -i` for editing the rebase instruction file. + The value is meant to be interpreted by the shell when it is used. + It can be overridden by the `GIT_SEQUENCE_EDITOR` environment variable. + When not configured the default commit message editor is used instead. + +core.pager:: + Text viewer for use by Git commands (e.g., 'less'). The value + is meant to be interpreted by the shell. The order of preference + is the `$GIT_PAGER` environment variable, then `core.pager` + configuration, then `$PAGER`, and then the default chosen at + compile time (usually 'less'). ++ +When the `LESS` environment variable is unset, Git sets it to `FRX` +(if `LESS` environment variable is set, Git does not change it at +all). If you want to selectively override Git's default setting +for `LESS`, you can set `core.pager` to e.g. `less -S`. This will +be passed to the shell by Git, which will translate the final +command to `LESS=FRX less -S`. The environment does not set the +`S` option but the command line does, instructing less to truncate +long lines. Similarly, setting `core.pager` to `less -+F` will +deactivate the `F` option specified by the environment from the +command-line, deactivating the "quit if one screen" behavior of +`less`. One can specifically activate some flags for particular +commands: for example, setting `pager.blame` to `less -S` enables +line truncation only for `git blame`. ++ +Likewise, when the `LV` environment variable is unset, Git sets it +to `-c`. You can override this setting by exporting `LV` with +another value or setting `core.pager` to `lv +c`. + +core.whitespace:: + A comma separated list of common whitespace problems to + notice. 'git diff' will use `color.diff.whitespace` to + highlight them, and 'git apply --whitespace=error' will + consider them as errors. You can prefix `-` to disable + any of them (e.g. `-trailing-space`): ++ +* `blank-at-eol` treats trailing whitespaces at the end of the line + as an error (enabled by default). +* `space-before-tab` treats a space character that appears immediately + before a tab character in the initial indent part of the line as an + error (enabled by default). +* `indent-with-non-tab` treats a line that is indented with space + characters instead of the equivalent tabs as an error (not enabled by + default). +* `tab-in-indent` treats a tab character in the initial indent part of + the line as an error (not enabled by default). +* `blank-at-eof` treats blank lines added at the end of file as an error + (enabled by default). +* `trailing-space` is a short-hand to cover both `blank-at-eol` and + `blank-at-eof`. +* `cr-at-eol` treats a carriage-return at the end of line as + part of the line terminator, i.e. with it, `trailing-space` + does not trigger if the character before such a carriage-return + is not a whitespace (not enabled by default). +* `tabwidth=<n>` tells how many character positions a tab occupies; this + is relevant for `indent-with-non-tab` and when Git fixes `tab-in-indent` + errors. The default tab width is 8. Allowed values are 1 to 63. + +core.fsyncObjectFiles:: + This boolean will enable 'fsync()' when writing object files. ++ +This is a total waste of time and effort on a filesystem that orders +data writes properly, but can be useful for filesystems that do not use +journalling (traditional UNIX filesystems) or that only journal metadata +and not file contents (OS X's HFS+, or Linux ext3 with "data=writeback"). + +core.preloadIndex:: + Enable parallel index preload for operations like 'git diff' ++ +This can speed up operations like 'git diff' and 'git status' especially +on filesystems like NFS that have weak caching semantics and thus +relatively high IO latencies. When enabled, Git will do the +index comparison to the filesystem data in parallel, allowing +overlapping IO's. Defaults to true. + +core.createObject:: + You can set this to 'link', in which case a hardlink followed by + a delete of the source are used to make sure that object creation + will not overwrite existing objects. ++ +On some file system/operating system combinations, this is unreliable. +Set this config setting to 'rename' there; However, This will remove the +check that makes sure that existing object files will not get overwritten. + +core.notesRef:: + When showing commit messages, also show notes which are stored in + the given ref. The ref must be fully qualified. If the given + ref does not exist, it is not an error but means that no + notes should be printed. ++ +This setting defaults to "refs/notes/commits", and it can be overridden by +the 'GIT_NOTES_REF' environment variable. See linkgit:git-notes[1]. + +core.sparseCheckout:: + Enable "sparse checkout" feature. See section "Sparse checkout" in + linkgit:git-read-tree[1] for more information. + +core.abbrev:: + Set the length object names are abbreviated to. If unspecified, + many commands abbreviate to 7 hexdigits, which may not be enough + for abbreviated object names to stay unique for sufficiently long + time. + +add.ignoreErrors:: +add.ignore-errors (deprecated):: + Tells 'git add' to continue adding files when some files cannot be + added due to indexing errors. Equivalent to the '--ignore-errors' + option of linkgit:git-add[1]. `add.ignore-errors` is deprecated, + as it does not follow the usual naming convention for configuration + variables. + +alias.*:: + Command aliases for the linkgit:git[1] command wrapper - e.g. + after defining "alias.last = cat-file commit HEAD", the invocation + "git last" is equivalent to "git cat-file commit HEAD". To avoid + confusion and troubles with script usage, aliases that + hide existing Git commands are ignored. Arguments are split by + spaces, the usual shell quoting and escaping is supported. + A quote pair or a backslash can be used to quote them. ++ +If the alias expansion is prefixed with an exclamation point, +it will be treated as a shell command. For example, defining +"alias.new = !gitk --all --not ORIG_HEAD", the invocation +"git new" is equivalent to running the shell command +"gitk --all --not ORIG_HEAD". Note that shell commands will be +executed from the top-level directory of a repository, which may +not necessarily be the current directory. +'GIT_PREFIX' is set as returned by running 'git rev-parse --show-prefix' +from the original current directory. See linkgit:git-rev-parse[1]. + +am.keepcr:: + If true, git-am will call git-mailsplit for patches in mbox format + with parameter '--keep-cr'. In this case git-mailsplit will + not remove `\r` from lines ending with `\r\n`. Can be overridden + by giving '--no-keep-cr' from the command line. + See linkgit:git-am[1], linkgit:git-mailsplit[1]. + +am.threeWay:: + By default, `git am` will fail if the patch does not apply cleanly. When + set to true, this setting tells `git am` to fall back on 3-way merge if + the patch records the identity of blobs it is supposed to apply to and + we have those blobs available locally (equivalent to giving the `--3way` + option from the command line). Defaults to `false`. + See linkgit:git-am[1]. + +apply.ignoreWhitespace:: + When set to 'change', tells 'git apply' to ignore changes in + whitespace, in the same way as the '--ignore-space-change' + option. + When set to one of: no, none, never, false tells 'git apply' to + respect all whitespace differences. + See linkgit:git-apply[1]. + +apply.whitespace:: + Tells 'git apply' how to handle whitespaces, in the same way + as the '--whitespace' option. See linkgit:git-apply[1]. + +branch.autoSetupMerge:: + Tells 'git branch' and 'git checkout' to set up new branches + so that linkgit:git-pull[1] will appropriately merge from the + starting point branch. Note that even if this option is not set, + this behavior can be chosen per-branch using the `--track` + and `--no-track` options. The valid settings are: `false` -- no + automatic setup is done; `true` -- automatic setup is done when the + starting point is a remote-tracking branch; `always` -- + automatic setup is done when the starting point is either a + local branch or remote-tracking + branch. This option defaults to true. + +branch.autoSetupRebase:: + When a new branch is created with 'git branch' or 'git checkout' + that tracks another branch, this variable tells Git to set + up pull to rebase instead of merge (see "branch.<name>.rebase"). + When `never`, rebase is never automatically set to true. + When `local`, rebase is set to true for tracked branches of + other local branches. + When `remote`, rebase is set to true for tracked branches of + remote-tracking branches. + When `always`, rebase will be set to true for all tracking + branches. + See "branch.autoSetupMerge" for details on how to set up a + branch to track another branch. + This option defaults to never. + +branch.<name>.remote:: + When on branch <name>, it tells 'git fetch' and 'git push' + which remote to fetch from/push to. The remote to push to + may be overridden with `remote.pushDefault` (for all branches). + The remote to push to, for the current branch, may be further + overridden by `branch.<name>.pushRemote`. If no remote is + configured, or if you are not on any branch, it defaults to + `origin` for fetching and `remote.pushDefault` for pushing. + Additionally, `.` (a period) is the current local repository + (a dot-repository), see `branch.<name>.merge`'s final note below. + +branch.<name>.pushRemote:: + When on branch <name>, it overrides `branch.<name>.remote` for + pushing. It also overrides `remote.pushDefault` for pushing + from branch <name>. When you pull from one place (e.g. your + upstream) and push to another place (e.g. your own publishing + repository), you would want to set `remote.pushDefault` to + specify the remote to push to for all branches, and use this + option to override it for a specific branch. + +branch.<name>.merge:: + Defines, together with branch.<name>.remote, the upstream branch + for the given branch. It tells 'git fetch'/'git pull'/'git rebase' which + branch to merge and can also affect 'git push' (see push.default). + When in branch <name>, it tells 'git fetch' the default + refspec to be marked for merging in FETCH_HEAD. The value is + handled like the remote part of a refspec, and must match a + ref which is fetched from the remote given by + "branch.<name>.remote". + The merge information is used by 'git pull' (which at first calls + 'git fetch') to lookup the default branch for merging. Without + this option, 'git pull' defaults to merge the first refspec fetched. + Specify multiple values to get an octopus merge. + If you wish to setup 'git pull' so that it merges into <name> from + another branch in the local repository, you can point + branch.<name>.merge to the desired branch, and use the relative path + setting `.` (a period) for branch.<name>.remote. + +branch.<name>.mergeOptions:: + Sets default options for merging into branch <name>. The syntax and + supported options are the same as those of linkgit:git-merge[1], but + option values containing whitespace characters are currently not + supported. + +branch.<name>.rebase:: + When true, rebase the branch <name> on top of the fetched branch, + instead of merging the default branch from the default remote when + "git pull" is run. See "pull.rebase" for doing this in a non + branch-specific manner. ++ +When preserve, also pass `--preserve-merges` along to 'git rebase' +so that locally committed merge commits will not be flattened +by running 'git pull'. ++ +When the value is `interactive`, the rebase is run in interactive mode. ++ +*NOTE*: this is a possibly dangerous operation; do *not* use +it unless you understand the implications (see linkgit:git-rebase[1] +for details). + +branch.<name>.description:: + Branch description, can be edited with + `git branch --edit-description`. Branch description is + automatically added in the format-patch cover letter or + request-pull summary. + +browser.<tool>.cmd:: + Specify the command to invoke the specified browser. The + specified command is evaluated in shell with the URLs passed + as arguments. (See linkgit:git-web{litdd}browse[1].) + +browser.<tool>.path:: + Override the path for the given tool that may be used to + browse HTML help (see '-w' option in linkgit:git-help[1]) or a + working repository in gitweb (see linkgit:git-instaweb[1]). + +clean.requireForce:: + A boolean to make git-clean do nothing unless given -f, + -i or -n. Defaults to true. + +color.branch:: + A boolean to enable/disable color in the output of + linkgit:git-branch[1]. May be set to `always`, + `false` (or `never`) or `auto` (or `true`), in which case colors are used + only when the output is to a terminal. Defaults to false. + +color.branch.<slot>:: + Use customized color for branch coloration. `<slot>` is one of + `current` (the current branch), `local` (a local branch), + `remote` (a remote-tracking branch in refs/remotes/), + `upstream` (upstream tracking branch), `plain` (other + refs). + +color.diff:: + Whether to use ANSI escape sequences to add color to patches. + If this is set to `always`, linkgit:git-diff[1], + linkgit:git-log[1], and linkgit:git-show[1] will use color + for all patches. If it is set to `true` or `auto`, those + commands will only use color when output is to the terminal. + Defaults to false. ++ +This does not affect linkgit:git-format-patch[1] or the +'git-diff-{asterisk}' plumbing commands. Can be overridden on the +command line with the `--color[=<when>]` option. + +color.diff.<slot>:: + Use customized color for diff colorization. `<slot>` specifies + which part of the patch to use the specified color, and is one + of `context` (context text - `plain` is a historical synonym), + `meta` (metainformation), `frag` + (hunk header), 'func' (function in hunk header), `old` (removed lines), + `new` (added lines), `commit` (commit headers), or `whitespace` + (highlighting whitespace errors). + +color.decorate.<slot>:: + Use customized color for 'git log --decorate' output. `<slot>` is one + of `branch`, `remoteBranch`, `tag`, `stash` or `HEAD` for local + branches, remote-tracking branches, tags, stash and HEAD, respectively. + +color.grep:: + When set to `always`, always highlight matches. When `false` (or + `never`), never. When set to `true` or `auto`, use color only + when the output is written to the terminal. Defaults to `false`. + +color.grep.<slot>:: + Use customized color for grep colorization. `<slot>` specifies which + part of the line to use the specified color, and is one of ++ +-- +`context`;; + non-matching text in context lines (when using `-A`, `-B`, or `-C`) +`filename`;; + filename prefix (when not using `-h`) +`function`;; + function name lines (when using `-p`) +`linenumber`;; + line number prefix (when using `-n`) +`match`;; + matching text (same as setting `matchContext` and `matchSelected`) +`matchContext`;; + matching text in context lines +`matchSelected`;; + matching text in selected lines +`selected`;; + non-matching text in selected lines +`separator`;; + separators between fields on a line (`:`, `-`, and `=`) + and between hunks (`--`) +-- + +color.interactive:: + When set to `always`, always use colors for interactive prompts + and displays (such as those used by "git-add --interactive" and + "git-clean --interactive"). When false (or `never`), never. + When set to `true` or `auto`, use colors only when the output is + to the terminal. Defaults to false. + +color.interactive.<slot>:: + Use customized color for 'git add --interactive' and 'git clean + --interactive' output. `<slot>` may be `prompt`, `header`, `help` + or `error`, for four distinct types of normal output from + interactive commands. + +color.pager:: + A boolean to enable/disable colored output when the pager is in + use (default is true). + +color.showBranch:: + A boolean to enable/disable color in the output of + linkgit:git-show-branch[1]. May be set to `always`, + `false` (or `never`) or `auto` (or `true`), in which case colors are used + only when the output is to a terminal. Defaults to false. + +color.status:: + A boolean to enable/disable color in the output of + linkgit:git-status[1]. May be set to `always`, + `false` (or `never`) or `auto` (or `true`), in which case colors are used + only when the output is to a terminal. Defaults to false. + +color.status.<slot>:: + Use customized color for status colorization. `<slot>` is + one of `header` (the header text of the status message), + `added` or `updated` (files which are added but not committed), + `changed` (files which are changed but not added in the index), + `untracked` (files which are not tracked by Git), + `branch` (the current branch), + `nobranch` (the color the 'no branch' warning is shown in, defaulting + to red), or + `unmerged` (files which have unmerged changes). + +color.ui:: + This variable determines the default value for variables such + as `color.diff` and `color.grep` that control the use of color + per command family. Its scope will expand as more commands learn + configuration to set a default for the `--color` option. Set it + to `false` or `never` if you prefer Git commands not to use + color unless enabled explicitly with some other configuration + or the `--color` option. Set it to `always` if you want all + output not intended for machine consumption to use color, to + `true` or `auto` (this is the default since Git 1.8.4) if you + want such output to use color when written to the terminal. + +column.ui:: + Specify whether supported commands should output in columns. + This variable consists of a list of tokens separated by spaces + or commas: ++ +These options control when the feature should be enabled +(defaults to 'never'): ++ +-- +`always`;; + always show in columns +`never`;; + never show in columns +`auto`;; + show in columns if the output is to the terminal +-- ++ +These options control layout (defaults to 'column'). Setting any +of these implies 'always' if none of 'always', 'never', or 'auto' are +specified. ++ +-- +`column`;; + fill columns before rows +`row`;; + fill rows before columns +`plain`;; + show in one column +-- ++ +Finally, these options can be combined with a layout option (defaults +to 'nodense'): ++ +-- +`dense`;; + make unequal size columns to utilize more space +`nodense`;; + make equal size columns +-- + +column.branch:: + Specify whether to output branch listing in `git branch` in columns. + See `column.ui` for details. + +column.clean:: + Specify the layout when list items in `git clean -i`, which always + shows files and directories in columns. See `column.ui` for details. + +column.status:: + Specify whether to output untracked files in `git status` in columns. + See `column.ui` for details. + +column.tag:: + Specify whether to output tag listing in `git tag` in columns. + See `column.ui` for details. + +commit.cleanup:: + This setting overrides the default of the `--cleanup` option in + `git commit`. See linkgit:git-commit[1] for details. Changing the + default can be useful when you always want to keep lines that begin + with comment character `#` in your log message, in which case you + would do `git config commit.cleanup whitespace` (note that you will + have to remove the help lines that begin with `#` in the commit log + template yourself, if you do this). + +commit.gpgSign:: + + A boolean to specify whether all commits should be GPG signed. + Use of this option when doing operations such as rebase can + result in a large number of commits being signed. It may be + convenient to use an agent to avoid typing your GPG passphrase + several times. + +commit.status:: + A boolean to enable/disable inclusion of status information in the + commit message template when using an editor to prepare the commit + message. Defaults to true. + +commit.template:: + Specify the pathname of a file to use as the template for + new commit messages. + +credential.helper:: + Specify an external helper to be called when a username or + password credential is needed; the helper may consult external + storage to avoid prompting the user for the credentials. See + linkgit:gitcredentials[7] for details. + +credential.useHttpPath:: + When acquiring credentials, consider the "path" component of an http + or https URL to be important. Defaults to false. See + linkgit:gitcredentials[7] for more information. + +credential.username:: + If no username is set for a network authentication, use this username + by default. See credential.<context>.* below, and + linkgit:gitcredentials[7]. + +credential.<url>.*:: + Any of the credential.* options above can be applied selectively to + some credentials. For example "credential.https://example.com.username" + would set the default username only for https connections to + example.com. See linkgit:gitcredentials[7] for details on how URLs are + matched. + +credentialCache.ignoreSIGHUP:: + Tell git-credential-cache--daemon to ignore SIGHUP, instead of quitting. + +include::diff-config.txt[] + +difftool.<tool>.path:: + Override the path for the given tool. This is useful in case + your tool is not in the PATH. + +difftool.<tool>.cmd:: + Specify the command to invoke the specified diff tool. + The specified command is evaluated in shell with the following + variables available: 'LOCAL' is set to the name of the temporary + file containing the contents of the diff pre-image and 'REMOTE' + is set to the name of the temporary file containing the contents + of the diff post-image. + +difftool.prompt:: + Prompt before each invocation of the diff tool. + +fetch.recurseSubmodules:: + This option can be either set to a boolean value or to 'on-demand'. + Setting it to a boolean changes the behavior of fetch and pull to + unconditionally recurse into submodules when set to true or to not + recurse at all when set to false. When set to 'on-demand' (the default + value), fetch and pull will only recurse into a populated submodule + when its superproject retrieves a commit that updates the submodule's + reference. + +fetch.fsckObjects:: + If it is set to true, git-fetch-pack will check all fetched + objects. It will abort in the case of a malformed object or a + broken link. The result of an abort are only dangling objects. + Defaults to false. If not set, the value of `transfer.fsckObjects` + is used instead. + +fetch.unpackLimit:: + If the number of objects fetched over the Git native + transfer is below this + limit, then the objects will be unpacked into loose object + files. However if the number of received objects equals or + exceeds this limit then the received pack will be stored as + a pack, after adding any missing delta bases. Storing the + pack from a push can make the push operation complete faster, + especially on slow filesystems. If not set, the value of + `transfer.unpackLimit` is used instead. + +fetch.prune:: + If true, fetch will automatically behave as if the `--prune` + option was given on the command line. See also `remote.<name>.prune`. + +format.attach:: + Enable multipart/mixed attachments as the default for + 'format-patch'. The value can also be a double quoted string + which will enable attachments as the default and set the + value as the boundary. See the --attach option in + linkgit:git-format-patch[1]. + +format.numbered:: + A boolean which can enable or disable sequence numbers in patch + subjects. It defaults to "auto" which enables it only if there + is more than one patch. It can be enabled or disabled for all + messages by setting it to "true" or "false". See --numbered + option in linkgit:git-format-patch[1]. + +format.headers:: + Additional email headers to include in a patch to be submitted + by mail. See linkgit:git-format-patch[1]. + +format.to:: +format.cc:: + Additional recipients to include in a patch to be submitted + by mail. See the --to and --cc options in + linkgit:git-format-patch[1]. + +format.subjectPrefix:: + The default for format-patch is to output files with the '[PATCH]' + subject prefix. Use this variable to change that prefix. + +format.signature:: + The default for format-patch is to output a signature containing + the Git version number. Use this variable to change that default. + Set this variable to the empty string ("") to suppress + signature generation. + +format.signatureFile:: + Works just like format.signature except the contents of the + file specified by this variable will be used as the signature. + +format.suffix:: + The default for format-patch is to output files with the suffix + `.patch`. Use this variable to change that suffix (make sure to + include the dot if you want it). + +format.pretty:: + The default pretty format for log/show/whatchanged command, + See linkgit:git-log[1], linkgit:git-show[1], + linkgit:git-whatchanged[1]. + +format.thread:: + The default threading style for 'git format-patch'. Can be + a boolean value, or `shallow` or `deep`. `shallow` threading + makes every mail a reply to the head of the series, + where the head is chosen from the cover letter, the + `--in-reply-to`, and the first patch mail, in this order. + `deep` threading makes every mail a reply to the previous one. + A true boolean value is the same as `shallow`, and a false + value disables threading. + +format.signOff:: + A boolean value which lets you enable the `-s/--signoff` option of + format-patch by default. *Note:* Adding the Signed-off-by: line to a + patch should be a conscious act and means that you certify you have + the rights to submit this work under the same open source license. + Please see the 'SubmittingPatches' document for further discussion. + +format.coverLetter:: + A boolean that controls whether to generate a cover-letter when + format-patch is invoked, but in addition can be set to "auto", to + generate a cover-letter only when there's more than one patch. + +format.outputDirectory:: + Set a custom directory to store the resulting files instead of the + current working directory. + +filter.<driver>.clean:: + The command which is used to convert the content of a worktree + file to a blob upon checkin. See linkgit:gitattributes[5] for + details. + +filter.<driver>.smudge:: + The command which is used to convert the content of a blob + object to a worktree file upon checkout. See + linkgit:gitattributes[5] for details. + +fsck.<msg-id>:: + Allows overriding the message type (error, warn or ignore) of a + specific message ID such as `missingEmail`. ++ +For convenience, fsck prefixes the error/warning with the message ID, +e.g. "missingEmail: invalid author/committer line - missing email" means +that setting `fsck.missingEmail = ignore` will hide that issue. ++ +This feature is intended to support working with legacy repositories +which cannot be repaired without disruptive changes. + +fsck.skipList:: + The path to a sorted list of object names (i.e. one SHA-1 per + line) that are known to be broken in a non-fatal way and should + be ignored. This feature is useful when an established project + should be accepted despite early commits containing errors that + can be safely ignored such as invalid committer email addresses. + Note: corrupt objects cannot be skipped with this setting. + +gc.aggressiveDepth:: + The depth parameter used in the delta compression + algorithm used by 'git gc --aggressive'. This defaults + to 250. + +gc.aggressiveWindow:: + The window size parameter used in the delta compression + algorithm used by 'git gc --aggressive'. This defaults + to 250. + +gc.auto:: + When there are approximately more than this many loose + objects in the repository, `git gc --auto` will pack them. + Some Porcelain commands use this command to perform a + light-weight garbage collection from time to time. The + default value is 6700. Setting this to 0 disables it. + +gc.autoPackLimit:: + When there are more than this many packs that are not + marked with `*.keep` file in the repository, `git gc + --auto` consolidates them into one larger pack. The + default value is 50. Setting this to 0 disables it. + +gc.autoDetach:: + Make `git gc --auto` return immediately and run in background + if the system supports it. Default is true. + +gc.packRefs:: + Running `git pack-refs` in a repository renders it + unclonable by Git versions prior to 1.5.1.2 over dumb + transports such as HTTP. This variable determines whether + 'git gc' runs `git pack-refs`. This can be set to `notbare` + to enable it within all non-bare repos or it can be set to a + boolean value. The default is `true`. + +gc.pruneExpire:: + When 'git gc' is run, it will call 'prune --expire 2.weeks.ago'. + Override the grace period with this config variable. The value + "now" may be used to disable this grace period and always prune + unreachable objects immediately, or "never" may be used to + suppress pruning. + +gc.worktreePruneExpire:: + When 'git gc' is run, it calls + 'git worktree prune --expire 3.months.ago'. + This config variable can be used to set a different grace + period. The value "now" may be used to disable the grace + period and prune `$GIT_DIR/worktrees` immediately, or "never" + may be used to suppress pruning. + +gc.reflogExpire:: +gc.<pattern>.reflogExpire:: + 'git reflog expire' removes reflog entries older than + this time; defaults to 90 days. The value "now" expires all + entries immediately, and "never" suppresses expiration + altogether. With "<pattern>" (e.g. + "refs/stash") in the middle the setting applies only to + the refs that match the <pattern>. + +gc.reflogExpireUnreachable:: +gc.<pattern>.reflogExpireUnreachable:: + 'git reflog expire' removes reflog entries older than + this time and are not reachable from the current tip; + defaults to 30 days. The value "now" expires all entries + immediately, and "never" suppresses expiration altogether. + With "<pattern>" (e.g. "refs/stash") + in the middle, the setting applies only to the refs that + match the <pattern>. + +gc.rerereResolved:: + Records of conflicted merge you resolved earlier are + kept for this many days when 'git rerere gc' is run. + The default is 60 days. See linkgit:git-rerere[1]. + +gc.rerereUnresolved:: + Records of conflicted merge you have not resolved are + kept for this many days when 'git rerere gc' is run. + The default is 15 days. See linkgit:git-rerere[1]. + +gitcvs.commitMsgAnnotation:: + Append this string to each commit message. Set to empty string + to disable this feature. Defaults to "via git-CVS emulator". + +gitcvs.enabled:: + Whether the CVS server interface is enabled for this repository. + See linkgit:git-cvsserver[1]. + +gitcvs.logFile:: + Path to a log file where the CVS server interface well... logs + various stuff. See linkgit:git-cvsserver[1]. + +gitcvs.usecrlfattr:: + If true, the server will look up the end-of-line conversion + attributes for files to determine the '-k' modes to use. If + the attributes force Git to treat a file as text, + the '-k' mode will be left blank so CVS clients will + treat it as text. If they suppress text conversion, the file + will be set with '-kb' mode, which suppresses any newline munging + the client might otherwise do. If the attributes do not allow + the file type to be determined, then 'gitcvs.allBinary' is + used. See linkgit:gitattributes[5]. + +gitcvs.allBinary:: + This is used if 'gitcvs.usecrlfattr' does not resolve + the correct '-kb' mode to use. If true, all + unresolved files are sent to the client in + mode '-kb'. This causes the client to treat them + as binary files, which suppresses any newline munging it + otherwise might do. Alternatively, if it is set to "guess", + then the contents of the file are examined to decide if + it is binary, similar to 'core.autocrlf'. + +gitcvs.dbName:: + Database used by git-cvsserver to cache revision information + derived from the Git repository. The exact meaning depends on the + used database driver, for SQLite (which is the default driver) this + is a filename. Supports variable substitution (see + linkgit:git-cvsserver[1] for details). May not contain semicolons (`;`). + Default: '%Ggitcvs.%m.sqlite' + +gitcvs.dbDriver:: + Used Perl DBI driver. You can specify any available driver + for this here, but it might not work. git-cvsserver is tested + with 'DBD::SQLite', reported to work with 'DBD::Pg', and + reported *not* to work with 'DBD::mysql'. Experimental feature. + May not contain double colons (`:`). Default: 'SQLite'. + See linkgit:git-cvsserver[1]. + +gitcvs.dbUser, gitcvs.dbPass:: + Database user and password. Only useful if setting 'gitcvs.dbDriver', + since SQLite has no concept of database users and/or passwords. + 'gitcvs.dbUser' supports variable substitution (see + linkgit:git-cvsserver[1] for details). + +gitcvs.dbTableNamePrefix:: + Database table name prefix. Prepended to the names of any + database tables used, allowing a single database to be used + for several repositories. Supports variable substitution (see + linkgit:git-cvsserver[1] for details). Any non-alphabetic + characters will be replaced with underscores. + +All gitcvs variables except for 'gitcvs.usecrlfattr' and +'gitcvs.allBinary' can also be specified as +'gitcvs.<access_method>.<varname>' (where 'access_method' +is one of "ext" and "pserver") to make them apply only for the given +access method. + +gitweb.category:: +gitweb.description:: +gitweb.owner:: +gitweb.url:: + See linkgit:gitweb[1] for description. + +gitweb.avatar:: +gitweb.blame:: +gitweb.grep:: +gitweb.highlight:: +gitweb.patches:: +gitweb.pickaxe:: +gitweb.remote_heads:: +gitweb.showSizes:: +gitweb.snapshot:: + See linkgit:gitweb.conf[5] for description. + +grep.lineNumber:: + If set to true, enable '-n' option by default. + +grep.patternType:: + Set the default matching behavior. Using a value of 'basic', 'extended', + 'fixed', or 'perl' will enable the '--basic-regexp', '--extended-regexp', + '--fixed-strings', or '--perl-regexp' option accordingly, while the + value 'default' will return to the default matching behavior. + +grep.extendedRegexp:: + If set to true, enable '--extended-regexp' option by default. This + option is ignored when the 'grep.patternType' option is set to a value + other than 'default'. + +grep.threads:: + Number of grep worker threads to use. + See `grep.threads` in linkgit:git-grep[1] for more information. + +grep.fallbackToNoIndex:: + If set to true, fall back to git grep --no-index if git grep + is executed outside of a git repository. Defaults to false. + +gpg.program:: + Use this custom program instead of "`gpg`" found on `$PATH` when + making or verifying a PGP signature. The program must support the + same command-line interface as GPG, namely, to verify a detached + signature, "`gpg --verify $file - <$signature`" is run, and the + program is expected to signal a good signature by exiting with + code 0, and to generate an ASCII-armored detached signature, the + standard input of "`gpg -bsau $key`" is fed with the contents to be + signed, and the program is expected to send the result to its + standard output. + +gui.commitMsgWidth:: + Defines how wide the commit message window is in the + linkgit:git-gui[1]. "75" is the default. + +gui.diffContext:: + Specifies how many context lines should be used in calls to diff + made by the linkgit:git-gui[1]. The default is "5". + +gui.displayUntracked:: + Determines if linkgit:git-gui[1] shows untracked files + in the file list. The default is "true". + +gui.encoding:: + Specifies the default encoding to use for displaying of + file contents in linkgit:git-gui[1] and linkgit:gitk[1]. + It can be overridden by setting the 'encoding' attribute + for relevant files (see linkgit:gitattributes[5]). + If this option is not set, the tools default to the + locale encoding. + +gui.matchTrackingBranch:: + Determines if new branches created with linkgit:git-gui[1] should + default to tracking remote branches with matching names or + not. Default: "false". + +gui.newBranchTemplate:: + Is used as suggested name when creating new branches using the + linkgit:git-gui[1]. + +gui.pruneDuringFetch:: + "true" if linkgit:git-gui[1] should prune remote-tracking branches when + performing a fetch. The default value is "false". + +gui.trustmtime:: + Determines if linkgit:git-gui[1] should trust the file modification + timestamp or not. By default the timestamps are not trusted. + +gui.spellingDictionary:: + Specifies the dictionary used for spell checking commit messages in + the linkgit:git-gui[1]. When set to "none" spell checking is turned + off. + +gui.fastCopyBlame:: + If true, 'git gui blame' uses `-C` instead of `-C -C` for original + location detection. It makes blame significantly faster on huge + repositories at the expense of less thorough copy detection. + +gui.copyBlameThreshold:: + Specifies the threshold to use in 'git gui blame' original location + detection, measured in alphanumeric characters. See the + linkgit:git-blame[1] manual for more information on copy detection. + +gui.blamehistoryctx:: + Specifies the radius of history context in days to show in + linkgit:gitk[1] for the selected commit, when the `Show History + Context` menu item is invoked from 'git gui blame'. If this + variable is set to zero, the whole history is shown. + +guitool.<name>.cmd:: + Specifies the shell command line to execute when the corresponding item + of the linkgit:git-gui[1] `Tools` menu is invoked. This option is + mandatory for every tool. The command is executed from the root of + the working directory, and in the environment it receives the name of + the tool as 'GIT_GUITOOL', the name of the currently selected file as + 'FILENAME', and the name of the current branch as 'CUR_BRANCH' (if + the head is detached, 'CUR_BRANCH' is empty). + +guitool.<name>.needsFile:: + Run the tool only if a diff is selected in the GUI. It guarantees + that 'FILENAME' is not empty. + +guitool.<name>.noConsole:: + Run the command silently, without creating a window to display its + output. + +guitool.<name>.noRescan:: + Don't rescan the working directory for changes after the tool + finishes execution. + +guitool.<name>.confirm:: + Show a confirmation dialog before actually running the tool. + +guitool.<name>.argPrompt:: + Request a string argument from the user, and pass it to the tool + through the 'ARGS' environment variable. Since requesting an + argument implies confirmation, the 'confirm' option has no effect + if this is enabled. If the option is set to 'true', 'yes', or '1', + the dialog uses a built-in generic prompt; otherwise the exact + value of the variable is used. + +guitool.<name>.revPrompt:: + Request a single valid revision from the user, and set the + 'REVISION' environment variable. In other aspects this option + is similar to 'argPrompt', and can be used together with it. + +guitool.<name>.revUnmerged:: + Show only unmerged branches in the 'revPrompt' subdialog. + This is useful for tools similar to merge or rebase, but not + for things like checkout or reset. + +guitool.<name>.title:: + Specifies the title to use for the prompt dialog. The default + is the tool name. + +guitool.<name>.prompt:: + Specifies the general prompt string to display at the top of + the dialog, before subsections for 'argPrompt' and 'revPrompt'. + The default value includes the actual command. + +help.browser:: + Specify the browser that will be used to display help in the + 'web' format. See linkgit:git-help[1]. + +help.format:: + Override the default help format used by linkgit:git-help[1]. + Values 'man', 'info', 'web' and 'html' are supported. 'man' is + the default. 'web' and 'html' are the same. + +help.autoCorrect:: + Automatically correct and execute mistyped commands after + waiting for the given number of deciseconds (0.1 sec). If more + than one command can be deduced from the entered text, nothing + will be executed. If the value of this option is negative, + the corrected command will be executed immediately. If the + value is 0 - the command will be just shown but not executed. + This is the default. + +help.htmlPath:: + Specify the path where the HTML documentation resides. File system paths + and URLs are supported. HTML pages will be prefixed with this path when + help is displayed in the 'web' format. This defaults to the documentation + path of your Git installation. + +http.proxy:: + Override the HTTP proxy, normally configured using the 'http_proxy', + 'https_proxy', and 'all_proxy' environment variables (see `curl(1)`). In + addition to the syntax understood by curl, it is possible to specify a + proxy string with a user name but no password, in which case git will + attempt to acquire one in the same way it does for other credentials. See + linkgit:gitcredentials[7] for more information. The syntax thus is + '[protocol://][user[:password]@]proxyhost[:port]'. This can be overridden + on a per-remote basis; see remote.<name>.proxy + +http.proxyAuthMethod:: + Set the method with which to authenticate against the HTTP proxy. This + only takes effect if the configured proxy string contains a user name part + (i.e. is of the form 'user@host' or 'user@host:port'). This can be + overridden on a per-remote basis; see `remote.<name>.proxyAuthMethod`. + Both can be overridden by the 'GIT_HTTP_PROXY_AUTHMETHOD' environment + variable. Possible values are: ++ +-- +* `anyauth` - Automatically pick a suitable authentication method. It is + assumed that the proxy answers an unauthenticated request with a 407 + status code and one or more Proxy-authenticate headers with supported + authentication methods. This is the default. +* `basic` - HTTP Basic authentication +* `digest` - HTTP Digest authentication; this prevents the password from being + transmitted to the proxy in clear text +* `negotiate` - GSS-Negotiate authentication (compare the --negotiate option + of `curl(1)`) +* `ntlm` - NTLM authentication (compare the --ntlm option of `curl(1)`) +-- + +http.emptyAuth:: + Attempt authentication without seeking a username or password. This + can be used to attempt GSS-Negotiate authentication without specifying + a username in the URL, as libcurl normally requires a username for + authentication. + +http.cookieFile:: + The pathname of a file containing previously stored cookie lines, + which should be used + in the Git http session, if they match the server. The file format + of the file to read cookies from should be plain HTTP headers or + the Netscape/Mozilla cookie file format (see `curl(1)`). + NOTE that the file specified with http.cookieFile is used only as + input unless http.saveCookies is set. + +http.saveCookies:: + If set, store cookies received during requests to the file specified by + http.cookieFile. Has no effect if http.cookieFile is unset. + +http.sslVersion:: + The SSL version to use when negotiating an SSL connection, if you + want to force the default. The available and default version + depend on whether libcurl was built against NSS or OpenSSL and the + particular configuration of the crypto library in use. Internally + this sets the 'CURLOPT_SSL_VERSION' option; see the libcurl + documentation for more details on the format of this option and + for the ssl version supported. Actually the possible values of + this option are: + + - sslv2 + - sslv3 + - tlsv1 + - tlsv1.0 + - tlsv1.1 + - tlsv1.2 + ++ +Can be overridden by the 'GIT_SSL_VERSION' environment variable. +To force git to use libcurl's default ssl version and ignore any +explicit http.sslversion option, set 'GIT_SSL_VERSION' to the +empty string. + +http.sslCipherList:: + A list of SSL ciphers to use when negotiating an SSL connection. + The available ciphers depend on whether libcurl was built against + NSS or OpenSSL and the particular configuration of the crypto + library in use. Internally this sets the 'CURLOPT_SSL_CIPHER_LIST' + option; see the libcurl documentation for more details on the format + of this list. ++ +Can be overridden by the 'GIT_SSL_CIPHER_LIST' environment variable. +To force git to use libcurl's default cipher list and ignore any +explicit http.sslCipherList option, set 'GIT_SSL_CIPHER_LIST' to the +empty string. + +http.sslVerify:: + Whether to verify the SSL certificate when fetching or pushing + over HTTPS. Can be overridden by the 'GIT_SSL_NO_VERIFY' environment + variable. + +http.sslCert:: + File containing the SSL certificate when fetching or pushing + over HTTPS. Can be overridden by the 'GIT_SSL_CERT' environment + variable. + +http.sslKey:: + File containing the SSL private key when fetching or pushing + over HTTPS. Can be overridden by the 'GIT_SSL_KEY' environment + variable. + +http.sslCertPasswordProtected:: + Enable Git's password prompt for the SSL certificate. Otherwise + OpenSSL will prompt the user, possibly many times, if the + certificate or private key is encrypted. Can be overridden by the + 'GIT_SSL_CERT_PASSWORD_PROTECTED' environment variable. + +http.sslCAInfo:: + File containing the certificates to verify the peer with when + fetching or pushing over HTTPS. Can be overridden by the + 'GIT_SSL_CAINFO' environment variable. + +http.sslCAPath:: + Path containing files with the CA certificates to verify the peer + with when fetching or pushing over HTTPS. Can be overridden + by the 'GIT_SSL_CAPATH' environment variable. + +http.pinnedpubkey:: + Public key of the https service. It may either be the filename of + a PEM or DER encoded public key file or a string starting with + 'sha256//' followed by the base64 encoded sha256 hash of the + public key. See also libcurl 'CURLOPT_PINNEDPUBLICKEY'. git will + exit with an error if this option is set but not supported by + cURL. + +http.sslTry:: + Attempt to use AUTH SSL/TLS and encrypted data transfers + when connecting via regular FTP protocol. This might be needed + if the FTP server requires it for security reasons or you wish + to connect securely whenever remote FTP server supports it. + Default is false since it might trigger certificate verification + errors on misconfigured servers. + +http.maxRequests:: + How many HTTP requests to launch in parallel. Can be overridden + by the 'GIT_HTTP_MAX_REQUESTS' environment variable. Default is 5. + +http.minSessions:: + The number of curl sessions (counted across slots) to be kept across + requests. They will not be ended with curl_easy_cleanup() until + http_cleanup() is invoked. If USE_CURL_MULTI is not defined, this + value will be capped at 1. Defaults to 1. + +http.postBuffer:: + Maximum size in bytes of the buffer used by smart HTTP + transports when POSTing data to the remote system. + For requests larger than this buffer size, HTTP/1.1 and + Transfer-Encoding: chunked is used to avoid creating a + massive pack file locally. Default is 1 MiB, which is + sufficient for most requests. + +http.lowSpeedLimit, http.lowSpeedTime:: + If the HTTP transfer speed is less than 'http.lowSpeedLimit' + for longer than 'http.lowSpeedTime' seconds, the transfer is aborted. + Can be overridden by the 'GIT_HTTP_LOW_SPEED_LIMIT' and + 'GIT_HTTP_LOW_SPEED_TIME' environment variables. + +http.noEPSV:: + A boolean which disables using of EPSV ftp command by curl. + This can helpful with some "poor" ftp servers which don't + support EPSV mode. Can be overridden by the 'GIT_CURL_FTP_NO_EPSV' + environment variable. Default is false (curl will use EPSV). + +http.userAgent:: + The HTTP USER_AGENT string presented to an HTTP server. The default + value represents the version of the client Git such as git/1.7.1. + This option allows you to override this value to a more common value + such as Mozilla/4.0. This may be necessary, for instance, if + connecting through a firewall that restricts HTTP connections to a set + of common USER_AGENT strings (but not including those like git/1.7.1). + Can be overridden by the 'GIT_HTTP_USER_AGENT' environment variable. + +http.<url>.*:: + Any of the http.* options above can be applied selectively to some URLs. + For a config key to match a URL, each element of the config key is + compared to that of the URL, in the following order: ++ +-- +. Scheme (e.g., `https` in `https://example.com/`). This field + must match exactly between the config key and the URL. + +. Host/domain name (e.g., `example.com` in `https://example.com/`). + This field must match exactly between the config key and the URL. + +. Port number (e.g., `8080` in `http://example.com:8080/`). + This field must match exactly between the config key and the URL. + Omitted port numbers are automatically converted to the correct + default for the scheme before matching. + +. Path (e.g., `repo.git` in `https://example.com/repo.git`). The + path field of the config key must match the path field of the URL + either exactly or as a prefix of slash-delimited path elements. This means + a config key with path `foo/` matches URL path `foo/bar`. A prefix can only + match on a slash (`/`) boundary. Longer matches take precedence (so a config + key with path `foo/bar` is a better match to URL path `foo/bar` than a config + key with just path `foo/`). + +. User name (e.g., `user` in `https://user@example.com/repo.git`). If + the config key has a user name it must match the user name in the + URL exactly. If the config key does not have a user name, that + config key will match a URL with any user name (including none), + but at a lower precedence than a config key with a user name. +-- ++ +The list above is ordered by decreasing precedence; a URL that matches +a config key's path is preferred to one that matches its user name. For example, +if the URL is `https://user@example.com/foo/bar` a config key match of +`https://example.com/foo` will be preferred over a config key match of +`https://user@example.com`. ++ +All URLs are normalized before attempting any matching (the password part, +if embedded in the URL, is always ignored for matching purposes) so that +equivalent URLs that are simply spelled differently will match properly. +Environment variable settings always override any matches. The URLs that are +matched against are those given directly to Git commands. This means any URLs +visited as a result of a redirection do not participate in matching. + +i18n.commitEncoding:: + Character encoding the commit messages are stored in; Git itself + does not care per se, but this information is necessary e.g. when + importing commits from emails or in the gitk graphical history + browser (and possibly at other places in the future or in other + porcelains). See e.g. linkgit:git-mailinfo[1]. Defaults to 'utf-8'. + +i18n.logOutputEncoding:: + Character encoding the commit messages are converted to when + running 'git log' and friends. + +imap:: + The configuration variables in the 'imap' section are described + in linkgit:git-imap-send[1]. + +index.version:: + Specify the version with which new index files should be + initialized. This does not affect existing repositories. + +init.templateDir:: + Specify the directory from which templates will be copied. + (See the "TEMPLATE DIRECTORY" section of linkgit:git-init[1].) + +instaweb.browser:: + Specify the program that will be used to browse your working + repository in gitweb. See linkgit:git-instaweb[1]. + +instaweb.httpd:: + The HTTP daemon command-line to start gitweb on your working + repository. See linkgit:git-instaweb[1]. + +instaweb.local:: + If true the web server started by linkgit:git-instaweb[1] will + be bound to the local IP (127.0.0.1). + +instaweb.modulePath:: + The default module path for linkgit:git-instaweb[1] to use + instead of /usr/lib/apache2/modules. Only used if httpd + is Apache. + +instaweb.port:: + The port number to bind the gitweb httpd to. See + linkgit:git-instaweb[1]. + +interactive.singleKey:: + In interactive commands, allow the user to provide one-letter + input with a single key (i.e., without hitting enter). + Currently this is used by the `--patch` mode of + linkgit:git-add[1], linkgit:git-checkout[1], linkgit:git-commit[1], + linkgit:git-reset[1], and linkgit:git-stash[1]. Note that this + setting is silently ignored if portable keystroke input + is not available; requires the Perl module Term::ReadKey. + +log.abbrevCommit:: + If true, makes linkgit:git-log[1], linkgit:git-show[1], and + linkgit:git-whatchanged[1] assume `--abbrev-commit`. You may + override this option with `--no-abbrev-commit`. + +log.date:: + Set the default date-time mode for the 'log' command. + Setting a value for log.date is similar to using 'git log''s + `--date` option. See linkgit:git-log[1] for details. + +log.decorate:: + Print out the ref names of any commits that are shown by the log + command. If 'short' is specified, the ref name prefixes 'refs/heads/', + 'refs/tags/' and 'refs/remotes/' will not be printed. If 'full' is + specified, the full ref name (including prefix) will be printed. + This is the same as the log commands '--decorate' option. + +log.follow:: + If `true`, `git log` will act as if the `--follow` option was used when + a single <path> is given. This has the same limitations as `--follow`, + i.e. it cannot be used to follow multiple files and does not work well + on non-linear history. + +log.showRoot:: + If true, the initial commit will be shown as a big creation event. + This is equivalent to a diff against an empty tree. + Tools like linkgit:git-log[1] or linkgit:git-whatchanged[1], which + normally hide the root commit will now show it. True by default. + +log.mailmap:: + If true, makes linkgit:git-log[1], linkgit:git-show[1], and + linkgit:git-whatchanged[1] assume `--use-mailmap`. + +mailinfo.scissors:: + If true, makes linkgit:git-mailinfo[1] (and therefore + linkgit:git-am[1]) act by default as if the --scissors option + was provided on the command-line. When active, this features + removes everything from the message body before a scissors + line (i.e. consisting mainly of ">8", "8<" and "-"). + +mailmap.file:: + The location of an augmenting mailmap file. The default + mailmap, located in the root of the repository, is loaded + first, then the mailmap file pointed to by this variable. + The location of the mailmap file may be in a repository + subdirectory, or somewhere outside of the repository itself. + See linkgit:git-shortlog[1] and linkgit:git-blame[1]. + +mailmap.blob:: + Like `mailmap.file`, but consider the value as a reference to a + blob in the repository. If both `mailmap.file` and + `mailmap.blob` are given, both are parsed, with entries from + `mailmap.file` taking precedence. In a bare repository, this + defaults to `HEAD:.mailmap`. In a non-bare repository, it + defaults to empty. + +man.viewer:: + Specify the programs that may be used to display help in the + 'man' format. See linkgit:git-help[1]. + +man.<tool>.cmd:: + Specify the command to invoke the specified man viewer. The + specified command is evaluated in shell with the man page + passed as argument. (See linkgit:git-help[1].) + +man.<tool>.path:: + Override the path for the given tool that may be used to + display help in the 'man' format. See linkgit:git-help[1]. + +include::merge-config.txt[] + +mergetool.<tool>.path:: + Override the path for the given tool. This is useful in case + your tool is not in the PATH. + +mergetool.<tool>.cmd:: + Specify the command to invoke the specified merge tool. The + specified command is evaluated in shell with the following + variables available: 'BASE' is the name of a temporary file + containing the common base of the files to be merged, if available; + 'LOCAL' is the name of a temporary file containing the contents of + the file on the current branch; 'REMOTE' is the name of a temporary + file containing the contents of the file from the branch being + merged; 'MERGED' contains the name of the file to which the merge + tool should write the results of a successful merge. + +mergetool.<tool>.trustExitCode:: + For a custom merge command, specify whether the exit code of + the merge command can be used to determine whether the merge was + successful. If this is not set to true then the merge target file + timestamp is checked and the merge assumed to have been successful + if the file has been updated, otherwise the user is prompted to + indicate the success of the merge. + +mergetool.meld.hasOutput:: + Older versions of `meld` do not support the `--output` option. + Git will attempt to detect whether `meld` supports `--output` + by inspecting the output of `meld --help`. Configuring + `mergetool.meld.hasOutput` will make Git skip these checks and + use the configured value instead. Setting `mergetool.meld.hasOutput` + to `true` tells Git to unconditionally use the `--output` option, + and `false` avoids using `--output`. + +mergetool.keepBackup:: + After performing a merge, the original file with conflict markers + can be saved as a file with a `.orig` extension. If this variable + is set to `false` then this file is not preserved. Defaults to + `true` (i.e. keep the backup files). + +mergetool.keepTemporaries:: + When invoking a custom merge tool, Git uses a set of temporary + files to pass to the tool. If the tool returns an error and this + variable is set to `true`, then these temporary files will be + preserved, otherwise they will be removed after the tool has + exited. Defaults to `false`. + +mergetool.writeToTemp:: + Git writes temporary 'BASE', 'LOCAL', and 'REMOTE' versions of + conflicting files in the worktree by default. Git will attempt + to use a temporary directory for these files when set `true`. + Defaults to `false`. + +mergetool.prompt:: + Prompt before each invocation of the merge resolution program. + +notes.mergeStrategy:: + Which merge strategy to choose by default when resolving notes + conflicts. Must be one of `manual`, `ours`, `theirs`, `union`, or + `cat_sort_uniq`. Defaults to `manual`. See "NOTES MERGE STRATEGIES" + section of linkgit:git-notes[1] for more information on each strategy. + +notes.<name>.mergeStrategy:: + Which merge strategy to choose when doing a notes merge into + refs/notes/<name>. This overrides the more general + "notes.mergeStrategy". See the "NOTES MERGE STRATEGIES" section in + linkgit:git-notes[1] for more information on the available strategies. + +notes.displayRef:: + The (fully qualified) refname from which to show notes when + showing commit messages. The value of this variable can be set + to a glob, in which case notes from all matching refs will be + shown. You may also specify this configuration variable + several times. A warning will be issued for refs that do not + exist, but a glob that does not match any refs is silently + ignored. ++ +This setting can be overridden with the `GIT_NOTES_DISPLAY_REF` +environment variable, which must be a colon separated list of refs or +globs. ++ +The effective value of "core.notesRef" (possibly overridden by +GIT_NOTES_REF) is also implicitly added to the list of refs to be +displayed. + +notes.rewrite.<command>:: + When rewriting commits with <command> (currently `amend` or + `rebase`) and this variable is set to `true`, Git + automatically copies your notes from the original to the + rewritten commit. Defaults to `true`, but see + "notes.rewriteRef" below. + +notes.rewriteMode:: + When copying notes during a rewrite (see the + "notes.rewrite.<command>" option), determines what to do if + the target commit already has a note. Must be one of + `overwrite`, `concatenate`, `cat_sort_uniq`, or `ignore`. + Defaults to `concatenate`. ++ +This setting can be overridden with the `GIT_NOTES_REWRITE_MODE` +environment variable. + +notes.rewriteRef:: + When copying notes during a rewrite, specifies the (fully + qualified) ref whose notes should be copied. The ref may be a + glob, in which case notes in all matching refs will be copied. + You may also specify this configuration several times. ++ +Does not have a default value; you must configure this variable to +enable note rewriting. Set it to `refs/notes/commits` to enable +rewriting for the default commit notes. ++ +This setting can be overridden with the `GIT_NOTES_REWRITE_REF` +environment variable, which must be a colon separated list of refs or +globs. + +pack.window:: + The size of the window used by linkgit:git-pack-objects[1] when no + window size is given on the command line. Defaults to 10. + +pack.depth:: + The maximum delta depth used by linkgit:git-pack-objects[1] when no + maximum depth is given on the command line. Defaults to 50. + +pack.windowMemory:: + The maximum size of memory that is consumed by each thread + in linkgit:git-pack-objects[1] for pack window memory when + no limit is given on the command line. The value can be + suffixed with "k", "m", or "g". When left unconfigured (or + set explicitly to 0), there will be no limit. + +pack.compression:: + An integer -1..9, indicating the compression level for objects + in a pack file. -1 is the zlib default. 0 means no + compression, and 1..9 are various speed/size tradeoffs, 9 being + slowest. If not set, defaults to core.compression. If that is + not set, defaults to -1, the zlib default, which is "a default + compromise between speed and compression (currently equivalent + to level 6)." ++ +Note that changing the compression level will not automatically recompress +all existing objects. You can force recompression by passing the -F option +to linkgit:git-repack[1]. + +pack.deltaCacheSize:: + The maximum memory in bytes used for caching deltas in + linkgit:git-pack-objects[1] before writing them out to a pack. + This cache is used to speed up the writing object phase by not + having to recompute the final delta result once the best match + for all objects is found. Repacking large repositories on machines + which are tight with memory might be badly impacted by this though, + especially if this cache pushes the system into swapping. + A value of 0 means no limit. The smallest size of 1 byte may be + used to virtually disable this cache. Defaults to 256 MiB. + +pack.deltaCacheLimit:: + The maximum size of a delta, that is cached in + linkgit:git-pack-objects[1]. This cache is used to speed up the + writing object phase by not having to recompute the final delta + result once the best match for all objects is found. Defaults to 1000. + +pack.threads:: + Specifies the number of threads to spawn when searching for best + delta matches. This requires that linkgit:git-pack-objects[1] + be compiled with pthreads otherwise this option is ignored with a + warning. This is meant to reduce packing time on multiprocessor + machines. The required amount of memory for the delta search window + is however multiplied by the number of threads. + Specifying 0 will cause Git to auto-detect the number of CPU's + and set the number of threads accordingly. + +pack.indexVersion:: + Specify the default pack index version. Valid values are 1 for + legacy pack index used by Git versions prior to 1.5.2, and 2 for + the new pack index with capabilities for packs larger than 4 GB + as well as proper protection against the repacking of corrupted + packs. Version 2 is the default. Note that version 2 is enforced + and this config option ignored whenever the corresponding pack is + larger than 2 GB. ++ +If you have an old Git that does not understand the version 2 `*.idx` file, +cloning or fetching over a non native protocol (e.g. "http") +that will copy both `*.pack` file and corresponding `*.idx` file from the +other side may give you a repository that cannot be accessed with your +older version of Git. If the `*.pack` file is smaller than 2 GB, however, +you can use linkgit:git-index-pack[1] on the *.pack file to regenerate +the `*.idx` file. + +pack.packSizeLimit:: + The maximum size of a pack. This setting only affects + packing to a file when repacking, i.e. the git:// protocol + is unaffected. It can be overridden by the `--max-pack-size` + option of linkgit:git-repack[1]. Reaching this limit results + in the creation of multiple packfiles; which in turn prevents + bitmaps from being created. + The minimum size allowed is limited to 1 MiB. + The default is unlimited. + Common unit suffixes of 'k', 'm', or 'g' are + supported. + +pack.useBitmaps:: + When true, git will use pack bitmaps (if available) when packing + to stdout (e.g., during the server side of a fetch). Defaults to + true. You should not generally need to turn this off unless + you are debugging pack bitmaps. + +pack.writeBitmaps (deprecated):: + This is a deprecated synonym for `repack.writeBitmaps`. + +pack.writeBitmapHashCache:: + When true, git will include a "hash cache" section in the bitmap + index (if one is written). This cache can be used to feed git's + delta heuristics, potentially leading to better deltas between + bitmapped and non-bitmapped objects (e.g., when serving a fetch + between an older, bitmapped pack and objects that have been + pushed since the last gc). The downside is that it consumes 4 + bytes per object of disk space, and that JGit's bitmap + implementation does not understand it, causing it to complain if + Git and JGit are used on the same repository. Defaults to false. + +pager.<cmd>:: + If the value is boolean, turns on or off pagination of the + output of a particular Git subcommand when writing to a tty. + Otherwise, turns on pagination for the subcommand using the + pager specified by the value of `pager.<cmd>`. If `--paginate` + or `--no-pager` is specified on the command line, it takes + precedence over this option. To disable pagination for all + commands, set `core.pager` or `GIT_PAGER` to `cat`. + +pretty.<name>:: + Alias for a --pretty= format string, as specified in + linkgit:git-log[1]. Any aliases defined here can be used just + as the built-in pretty formats could. For example, + running `git config pretty.changelog "format:* %H %s"` + would cause the invocation `git log --pretty=changelog` + to be equivalent to running `git log "--pretty=format:* %H %s"`. + Note that an alias with the same name as a built-in format + will be silently ignored. + +pull.ff:: + By default, Git does not create an extra merge commit when merging + a commit that is a descendant of the current commit. Instead, the + tip of the current branch is fast-forwarded. When set to `false`, + this variable tells Git to create an extra merge commit in such + a case (equivalent to giving the `--no-ff` option from the command + line). When set to `only`, only such fast-forward merges are + allowed (equivalent to giving the `--ff-only` option from the + command line). This setting overrides `merge.ff` when pulling. + +pull.rebase:: + When true, rebase branches on top of the fetched branch, instead + of merging the default branch from the default remote when "git + pull" is run. See "branch.<name>.rebase" for setting this on a + per-branch basis. ++ +When preserve, also pass `--preserve-merges` along to 'git rebase' +so that locally committed merge commits will not be flattened +by running 'git pull'. ++ +When the value is `interactive`, the rebase is run in interactive mode. ++ +*NOTE*: this is a possibly dangerous operation; do *not* use +it unless you understand the implications (see linkgit:git-rebase[1] +for details). + +pull.octopus:: + The default merge strategy to use when pulling multiple branches + at once. + +pull.twohead:: + The default merge strategy to use when pulling a single branch. + +push.default:: + Defines the action `git push` should take if no refspec is + explicitly given. Different values are well-suited for + specific workflows; for instance, in a purely central workflow + (i.e. the fetch source is equal to the push destination), + `upstream` is probably what you want. Possible values are: ++ +-- + +* `nothing` - do not push anything (error out) unless a refspec is + explicitly given. This is primarily meant for people who want to + avoid mistakes by always being explicit. + +* `current` - push the current branch to update a branch with the same + name on the receiving end. Works in both central and non-central + workflows. + +* `upstream` - push the current branch back to the branch whose + changes are usually integrated into the current branch (which is + called `@{upstream}`). This mode only makes sense if you are + pushing to the same repository you would normally pull from + (i.e. central workflow). + +* `simple` - in centralized workflow, work like `upstream` with an + added safety to refuse to push if the upstream branch's name is + different from the local one. ++ +When pushing to a remote that is different from the remote you normally +pull from, work as `current`. This is the safest option and is suited +for beginners. ++ +This mode has become the default in Git 2.0. + +* `matching` - push all branches having the same name on both ends. + This makes the repository you are pushing to remember the set of + branches that will be pushed out (e.g. if you always push 'maint' + and 'master' there and no other branches, the repository you push + to will have these two branches, and your local 'maint' and + 'master' will be pushed there). ++ +To use this mode effectively, you have to make sure _all_ the +branches you would push out are ready to be pushed out before +running 'git push', as the whole point of this mode is to allow you +to push all of the branches in one go. If you usually finish work +on only one branch and push out the result, while other branches are +unfinished, this mode is not for you. Also this mode is not +suitable for pushing into a shared central repository, as other +people may add new branches there, or update the tip of existing +branches outside your control. ++ +This used to be the default, but not since Git 2.0 (`simple` is the +new default). + +-- + +push.followTags:: + If set to true enable '--follow-tags' option by default. You + may override this configuration at time of push by specifying + '--no-follow-tags'. + +push.gpgSign:: + May be set to a boolean value, or the string 'if-asked'. A true + value causes all pushes to be GPG signed, as if '--signed' is + passed to linkgit:git-push[1]. The string 'if-asked' causes + pushes to be signed if the server supports it, as if + '--signed=if-asked' is passed to 'git push'. A false value may + override a value from a lower-priority config file. An explicit + command-line flag always overrides this config option. + +push.recurseSubmodules:: + Make sure all submodule commits used by the revisions to be pushed + are available on a remote-tracking branch. If the value is 'check' + then Git will verify that all submodule commits that changed in the + revisions to be pushed are available on at least one remote of the + submodule. If any commits are missing, the push will be aborted and + exit with non-zero status. If the value is 'on-demand' then all + submodules that changed in the revisions to be pushed will be + pushed. If on-demand was not able to push all necessary revisions + it will also be aborted and exit with non-zero status. If the value + is 'no' then default behavior of ignoring submodules when pushing + is retained. You may override this configuration at time of push by + specifying '--recurse-submodules=check|on-demand|no'. + +rebase.stat:: + Whether to show a diffstat of what changed upstream since the last + rebase. False by default. + +rebase.autoSquash:: + If set to true enable '--autosquash' option by default. + +rebase.autoStash:: + When set to true, automatically create a temporary stash + before the operation begins, and apply it after the operation + ends. This means that you can run rebase on a dirty worktree. + However, use with care: the final stash application after a + successful rebase might result in non-trivial conflicts. + Defaults to false. + +rebase.missingCommitsCheck:: + If set to "warn", git rebase -i will print a warning if some + commits are removed (e.g. a line was deleted), however the + rebase will still proceed. If set to "error", it will print + the previous warning and stop the rebase, 'git rebase + --edit-todo' can then be used to correct the error. If set to + "ignore", no checking is done. + To drop a commit without warning or error, use the `drop` + command in the todo-list. + Defaults to "ignore". + +rebase.instructionFormat + A format string, as specified in linkgit:git-log[1], to be used for + the instruction list during an interactive rebase. The format will automatically + have the long commit hash prepended to the format. + +receive.advertiseAtomic:: + By default, git-receive-pack will advertise the atomic push + capability to its clients. If you don't want to this capability + to be advertised, set this variable to false. + +receive.autogc:: + By default, git-receive-pack will run "git-gc --auto" after + receiving data from git-push and updating refs. You can stop + it by setting this variable to false. + +receive.certNonceSeed:: + By setting this variable to a string, `git receive-pack` + will accept a `git push --signed` and verifies it by using + a "nonce" protected by HMAC using this string as a secret + key. + +receive.certNonceSlop:: + When a `git push --signed` sent a push certificate with a + "nonce" that was issued by a receive-pack serving the same + repository within this many seconds, export the "nonce" + found in the certificate to `GIT_PUSH_CERT_NONCE` to the + hooks (instead of what the receive-pack asked the sending + side to include). This may allow writing checks in + `pre-receive` and `post-receive` a bit easier. Instead of + checking `GIT_PUSH_CERT_NONCE_SLOP` environment variable + that records by how many seconds the nonce is stale to + decide if they want to accept the certificate, they only + can check `GIT_PUSH_CERT_NONCE_STATUS` is `OK`. + +receive.fsckObjects:: + If it is set to true, git-receive-pack will check all received + objects. It will abort in the case of a malformed object or a + broken link. The result of an abort are only dangling objects. + Defaults to false. If not set, the value of `transfer.fsckObjects` + is used instead. + +receive.fsck.<msg-id>:: + When `receive.fsckObjects` is set to true, errors can be switched + to warnings and vice versa by configuring the `receive.fsck.<msg-id>` + setting where the `<msg-id>` is the fsck message ID and the value + is one of `error`, `warn` or `ignore`. For convenience, fsck prefixes + the error/warning with the message ID, e.g. "missingEmail: invalid + author/committer line - missing email" means that setting + `receive.fsck.missingEmail = ignore` will hide that issue. ++ +This feature is intended to support working with legacy repositories +which would not pass pushing when `receive.fsckObjects = true`, allowing +the host to accept repositories with certain known issues but still catch +other issues. + +receive.fsck.skipList:: + The path to a sorted list of object names (i.e. one SHA-1 per + line) that are known to be broken in a non-fatal way and should + be ignored. This feature is useful when an established project + should be accepted despite early commits containing errors that + can be safely ignored such as invalid committer email addresses. + Note: corrupt objects cannot be skipped with this setting. + +receive.unpackLimit:: + If the number of objects received in a push is below this + limit then the objects will be unpacked into loose object + files. However if the number of received objects equals or + exceeds this limit then the received pack will be stored as + a pack, after adding any missing delta bases. Storing the + pack from a push can make the push operation complete faster, + especially on slow filesystems. If not set, the value of + `transfer.unpackLimit` is used instead. + +receive.denyDeletes:: + If set to true, git-receive-pack will deny a ref update that deletes + the ref. Use this to prevent such a ref deletion via a push. + +receive.denyDeleteCurrent:: + If set to true, git-receive-pack will deny a ref update that + deletes the currently checked out branch of a non-bare repository. + +receive.denyCurrentBranch:: + If set to true or "refuse", git-receive-pack will deny a ref update + to the currently checked out branch of a non-bare repository. + Such a push is potentially dangerous because it brings the HEAD + out of sync with the index and working tree. If set to "warn", + print a warning of such a push to stderr, but allow the push to + proceed. If set to false or "ignore", allow such pushes with no + message. Defaults to "refuse". ++ +Another option is "updateInstead" which will update the working +tree if pushing into the current branch. This option is +intended for synchronizing working directories when one side is not easily +accessible via interactive ssh (e.g. a live web site, hence the requirement +that the working directory be clean). This mode also comes in handy when +developing inside a VM to test and fix code on different Operating Systems. ++ +By default, "updateInstead" will refuse the push if the working tree or +the index have any difference from the HEAD, but the `push-to-checkout` +hook can be used to customize this. See linkgit:githooks[5]. + +receive.denyNonFastForwards:: + If set to true, git-receive-pack will deny a ref update which is + not a fast-forward. Use this to prevent such an update via a push, + even if that push is forced. This configuration variable is + set when initializing a shared repository. + +receive.hideRefs:: + This variable is the same as `transfer.hideRefs`, but applies + only to `receive-pack` (and so affects pushes, but not fetches). + An attempt to update or delete a hidden ref by `git push` is + rejected. + +receive.updateServerInfo:: + If set to true, git-receive-pack will run git-update-server-info + after receiving data from git-push and updating refs. + +receive.shallowUpdate:: + If set to true, .git/shallow can be updated when new refs + require new shallow roots. Otherwise those refs are rejected. + +remote.pushDefault:: + The remote to push to by default. Overrides + `branch.<name>.remote` for all branches, and is overridden by + `branch.<name>.pushRemote` for specific branches. + +remote.<name>.url:: + The URL of a remote repository. See linkgit:git-fetch[1] or + linkgit:git-push[1]. + +remote.<name>.pushurl:: + The push URL of a remote repository. See linkgit:git-push[1]. + +remote.<name>.proxy:: + For remotes that require curl (http, https and ftp), the URL to + the proxy to use for that remote. Set to the empty string to + disable proxying for that remote. + +remote.<name>.proxyAuthMethod:: + For remotes that require curl (http, https and ftp), the method to use for + authenticating against the proxy in use (probably set in + `remote.<name>.proxy`). See `http.proxyAuthMethod`. + +remote.<name>.fetch:: + The default set of "refspec" for linkgit:git-fetch[1]. See + linkgit:git-fetch[1]. + +remote.<name>.push:: + The default set of "refspec" for linkgit:git-push[1]. See + linkgit:git-push[1]. + +remote.<name>.mirror:: + If true, pushing to this remote will automatically behave + as if the `--mirror` option was given on the command line. + +remote.<name>.skipDefaultUpdate:: + If true, this remote will be skipped by default when updating + using linkgit:git-fetch[1] or the `update` subcommand of + linkgit:git-remote[1]. + +remote.<name>.skipFetchAll:: + If true, this remote will be skipped by default when updating + using linkgit:git-fetch[1] or the `update` subcommand of + linkgit:git-remote[1]. + +remote.<name>.receivepack:: + The default program to execute on the remote side when pushing. See + option --receive-pack of linkgit:git-push[1]. + +remote.<name>.uploadpack:: + The default program to execute on the remote side when fetching. See + option --upload-pack of linkgit:git-fetch-pack[1]. + +remote.<name>.tagOpt:: + Setting this value to --no-tags disables automatic tag following when + fetching from remote <name>. Setting it to --tags will fetch every + tag from remote <name>, even if they are not reachable from remote + branch heads. Passing these flags directly to linkgit:git-fetch[1] can + override this setting. See options --tags and --no-tags of + linkgit:git-fetch[1]. + +remote.<name>.vcs:: + Setting this to a value <vcs> will cause Git to interact with + the remote with the git-remote-<vcs> helper. + +remote.<name>.prune:: + When set to true, fetching from this remote by default will also + remove any remote-tracking references that no longer exist on the + remote (as if the `--prune` option was given on the command line). + Overrides `fetch.prune` settings, if any. + +remotes.<group>:: + The list of remotes which are fetched by "git remote update + <group>". See linkgit:git-remote[1]. + +repack.useDeltaBaseOffset:: + By default, linkgit:git-repack[1] creates packs that use + delta-base offset. If you need to share your repository with + Git older than version 1.4.4, either directly or via a dumb + protocol such as http, then you need to set this option to + "false" and repack. Access from old Git versions over the + native protocol are unaffected by this option. + +repack.packKeptObjects:: + If set to true, makes `git repack` act as if + `--pack-kept-objects` was passed. See linkgit:git-repack[1] for + details. Defaults to `false` normally, but `true` if a bitmap + index is being written (either via `--write-bitmap-index` or + `repack.writeBitmaps`). + +repack.writeBitmaps:: + When true, git will write a bitmap index when packing all + objects to disk (e.g., when `git repack -a` is run). This + index can speed up the "counting objects" phase of subsequent + packs created for clones and fetches, at the cost of some disk + space and extra time spent on the initial repack. This has + no effect if multiple packfiles are created. + Defaults to false. + +rerere.autoUpdate:: + When set to true, `git-rerere` updates the index with the + resulting contents after it cleanly resolves conflicts using + previously recorded resolution. Defaults to false. + +rerere.enabled:: + Activate recording of resolved conflicts, so that identical + conflict hunks can be resolved automatically, should they be + encountered again. By default, linkgit:git-rerere[1] is + enabled if there is an `rr-cache` directory under the + `$GIT_DIR`, e.g. if "rerere" was previously used in the + repository. + +sendemail.identity:: + A configuration identity. When given, causes values in the + 'sendemail.<identity>' subsection to take precedence over + values in the 'sendemail' section. The default identity is + the value of 'sendemail.identity'. + +sendemail.smtpEncryption:: + See linkgit:git-send-email[1] for description. Note that this + setting is not subject to the 'identity' mechanism. + +sendemail.smtpssl (deprecated):: + Deprecated alias for 'sendemail.smtpEncryption = ssl'. + +sendemail.smtpsslcertpath:: + Path to ca-certificates (either a directory or a single file). + Set it to an empty string to disable certificate verification. + +sendemail.<identity>.*:: + Identity-specific versions of the 'sendemail.*' parameters + found below, taking precedence over those when the this + identity is selected, through command-line or + 'sendemail.identity'. + +sendemail.aliasesFile:: +sendemail.aliasFileType:: +sendemail.annotate:: +sendemail.bcc:: +sendemail.cc:: +sendemail.ccCmd:: +sendemail.chainReplyTo:: +sendemail.confirm:: +sendemail.envelopeSender:: +sendemail.from:: +sendemail.multiEdit:: +sendemail.signedoffbycc:: +sendemail.smtpPass:: +sendemail.suppresscc:: +sendemail.suppressFrom:: +sendemail.to:: +sendemail.smtpDomain:: +sendemail.smtpServer:: +sendemail.smtpServerPort:: +sendemail.smtpServerOption:: +sendemail.smtpUser:: +sendemail.thread:: +sendemail.transferEncoding:: +sendemail.validate:: +sendemail.xmailer:: + See linkgit:git-send-email[1] for description. + +sendemail.signedoffcc (deprecated):: + Deprecated alias for 'sendemail.signedoffbycc'. + +showbranch.default:: + The default set of branches for linkgit:git-show-branch[1]. + See linkgit:git-show-branch[1]. + +status.relativePaths:: + By default, linkgit:git-status[1] shows paths relative to the + current directory. Setting this variable to `false` shows paths + relative to the repository root (this was the default for Git + prior to v1.5.4). + +status.short:: + Set to true to enable --short by default in linkgit:git-status[1]. + The option --no-short takes precedence over this variable. + +status.branch:: + Set to true to enable --branch by default in linkgit:git-status[1]. + The option --no-branch takes precedence over this variable. + +status.displayCommentPrefix:: + If set to true, linkgit:git-status[1] will insert a comment + prefix before each output line (starting with + `core.commentChar`, i.e. `#` by default). This was the + behavior of linkgit:git-status[1] in Git 1.8.4 and previous. + Defaults to false. + +status.showUntrackedFiles:: + By default, linkgit:git-status[1] and linkgit:git-commit[1] show + files which are not currently tracked by Git. Directories which + contain only untracked files, are shown with the directory name + only. Showing untracked files means that Git needs to lstat() all + the files in the whole repository, which might be slow on some + systems. So, this variable controls how the commands displays + the untracked files. Possible values are: ++ +-- +* `no` - Show no untracked files. +* `normal` - Show untracked files and directories. +* `all` - Show also individual files in untracked directories. +-- ++ +If this variable is not specified, it defaults to 'normal'. +This variable can be overridden with the -u|--untracked-files option +of linkgit:git-status[1] and linkgit:git-commit[1]. + +status.submoduleSummary:: + Defaults to false. + If this is set to a non zero number or true (identical to -1 or an + unlimited number), the submodule summary will be enabled and a + summary of commits for modified submodules will be shown (see + --summary-limit option of linkgit:git-submodule[1]). Please note + that the summary output command will be suppressed for all + submodules when `diff.ignoreSubmodules` is set to 'all' or only + for those submodules where `submodule.<name>.ignore=all`. The only + exception to that rule is that status and commit will show staged + submodule changes. To + also view the summary for ignored submodules you can either use + the --ignore-submodules=dirty command-line option or the 'git + submodule summary' command, which shows a similar output but does + not honor these settings. + +stash.showPatch:: + If this is set to true, the `git stash show` command without an + option will show the stash in patch form. Defaults to false. + See description of 'show' command in linkgit:git-stash[1]. + +stash.showStat:: + If this is set to true, the `git stash show` command without an + option will show diffstat of the stash. Defaults to true. + See description of 'show' command in linkgit:git-stash[1]. + +submodule.<name>.path:: +submodule.<name>.url:: + The path within this project and URL for a submodule. These + variables are initially populated by 'git submodule init'. See + linkgit:git-submodule[1] and linkgit:gitmodules[5] for + details. + +submodule.<name>.update:: + The default update procedure for a submodule. This variable + is populated by `git submodule init` from the + linkgit:gitmodules[5] file. See description of 'update' + command in linkgit:git-submodule[1]. + +submodule.<name>.branch:: + The remote branch name for a submodule, used by `git submodule + update --remote`. Set this option to override the value found in + the `.gitmodules` file. See linkgit:git-submodule[1] and + linkgit:gitmodules[5] for details. + +submodule.<name>.fetchRecurseSubmodules:: + This option can be used to control recursive fetching of this + submodule. It can be overridden by using the --[no-]recurse-submodules + command-line option to "git fetch" and "git pull". + This setting will override that from in the linkgit:gitmodules[5] + file. + +submodule.<name>.ignore:: + Defines under what circumstances "git status" and the diff family show + a submodule as modified. When set to "all", it will never be considered + modified (but it will nonetheless show up in the output of status and + commit when it has been staged), "dirty" will ignore all changes + to the submodules work tree and + takes only differences between the HEAD of the submodule and the commit + recorded in the superproject into account. "untracked" will additionally + let submodules with modified tracked files in their work tree show up. + Using "none" (the default when this option is not set) also shows + submodules that have untracked files in their work tree as changed. + This setting overrides any setting made in .gitmodules for this submodule, + both settings can be overridden on the command line by using the + "--ignore-submodules" option. The 'git submodule' commands are not + affected by this setting. + +tag.sort:: + This variable controls the sort ordering of tags when displayed by + linkgit:git-tag[1]. Without the "--sort=<value>" option provided, the + value of this variable will be used as the default. + +tar.umask:: + This variable can be used to restrict the permission bits of + tar archive entries. The default is 0002, which turns off the + world write bit. The special value "user" indicates that the + archiving user's umask will be used instead. See umask(2) and + linkgit:git-archive[1]. + +transfer.fsckObjects:: + When `fetch.fsckObjects` or `receive.fsckObjects` are + not set, the value of this variable is used instead. + Defaults to false. + +transfer.hideRefs:: + String(s) `receive-pack` and `upload-pack` use to decide which + refs to omit from their initial advertisements. Use more than + one definition to specify multiple prefix strings. A ref that is + under the hierarchies listed in the value of this variable is + excluded, and is hidden when responding to `git push` or `git + fetch`. See `receive.hideRefs` and `uploadpack.hideRefs` for + program-specific versions of this config. ++ +You may also include a `!` in front of the ref name to negate the entry, +explicitly exposing it, even if an earlier entry marked it as hidden. +If you have multiple hideRefs values, later entries override earlier ones +(and entries in more-specific config files override less-specific ones). ++ +If a namespace is in use, the namespace prefix is stripped from each +reference before it is matched against `transfer.hiderefs` patterns. +For example, if `refs/heads/master` is specified in `transfer.hideRefs` and +the current namespace is `foo`, then `refs/namespaces/foo/refs/heads/master` +is omitted from the advertisements but `refs/heads/master` and +`refs/namespaces/bar/refs/heads/master` are still advertised as so-called +"have" lines. In order to match refs before stripping, add a `^` in front of +the ref name. If you combine `!` and `^`, `!` must be specified first. + +transfer.unpackLimit:: + When `fetch.unpackLimit` or `receive.unpackLimit` are + not set, the value of this variable is used instead. + The default value is 100. + +uploadarchive.allowUnreachable:: + If true, allow clients to use `git archive --remote` to request + any tree, whether reachable from the ref tips or not. See the + discussion in the `SECURITY` section of + linkgit:git-upload-archive[1] for more details. Defaults to + `false`. + +uploadpack.hideRefs:: + This variable is the same as `transfer.hideRefs`, but applies + only to `upload-pack` (and so affects only fetches, not pushes). + An attempt to fetch a hidden ref by `git fetch` will fail. See + also `uploadpack.allowTipSHA1InWant`. + +uploadpack.allowTipSHA1InWant:: + When `uploadpack.hideRefs` is in effect, allow `upload-pack` + to accept a fetch request that asks for an object at the tip + of a hidden ref (by default, such a request is rejected). + see also `uploadpack.hideRefs`. + +uploadpack.allowReachableSHA1InWant:: + Allow `upload-pack` to accept a fetch request that asks for an + object that is reachable from any ref tip. However, note that + calculating object reachability is computationally expensive. + Defaults to `false`. + +uploadpack.keepAlive:: + When `upload-pack` has started `pack-objects`, there may be a + quiet period while `pack-objects` prepares the pack. Normally + it would output progress information, but if `--quiet` was used + for the fetch, `pack-objects` will output nothing at all until + the pack data begins. Some clients and networks may consider + the server to be hung and give up. Setting this option instructs + `upload-pack` to send an empty keepalive packet every + `uploadpack.keepAlive` seconds. Setting this option to 0 + disables keepalive packets entirely. The default is 5 seconds. + +url.<base>.insteadOf:: + Any URL that starts with this value will be rewritten to + start, instead, with <base>. In cases where some site serves a + large number of repositories, and serves them with multiple + access methods, and some users need to use different access + methods, this feature allows people to specify any of the + equivalent URLs and have Git automatically rewrite the URL to + the best alternative for the particular user, even for a + never-before-seen repository on the site. When more than one + insteadOf strings match a given URL, the longest match is used. + +url.<base>.pushInsteadOf:: + Any URL that starts with this value will not be pushed to; + instead, it will be rewritten to start with <base>, and the + resulting URL will be pushed to. In cases where some site serves + a large number of repositories, and serves them with multiple + access methods, some of which do not allow push, this feature + allows people to specify a pull-only URL and have Git + automatically use an appropriate URL to push, even for a + never-before-seen repository on the site. When more than one + pushInsteadOf strings match a given URL, the longest match is + used. If a remote has an explicit pushurl, Git will ignore this + setting for that remote. + +user.email:: + Your email address to be recorded in any newly created commits. + Can be overridden by the 'GIT_AUTHOR_EMAIL', 'GIT_COMMITTER_EMAIL', and + 'EMAIL' environment variables. See linkgit:git-commit-tree[1]. + +user.name:: + Your full name to be recorded in any newly created commits. + Can be overridden by the 'GIT_AUTHOR_NAME' and 'GIT_COMMITTER_NAME' + environment variables. See linkgit:git-commit-tree[1]. + +user.useConfigOnly:: + Instruct Git to avoid trying to guess defaults for 'user.email' + and 'user.name', and instead retrieve the values only from the + configuration. For example, if you have multiple email addresses + and would like to use a different one for each repository, then + with this configuration option set to `true` in the global config + along with a name, Git will prompt you to set up an email before + making new commits in a newly cloned repository. + Defaults to `false`. + +user.signingKey:: + If linkgit:git-tag[1] or linkgit:git-commit[1] is not selecting the + key you want it to automatically when creating a signed tag or + commit, you can override the default selection with this variable. + This option is passed unchanged to gpg's --local-user parameter, + so you may specify a key using any method that gpg supports. + +versionsort.prereleaseSuffix:: + When version sort is used in linkgit:git-tag[1], prerelease + tags (e.g. "1.0-rc1") may appear after the main release + "1.0". By specifying the suffix "-rc" in this variable, + "1.0-rc1" will appear before "1.0". ++ +This variable can be specified multiple times, once per suffix. The +order of suffixes in the config file determines the sorting order +(e.g. if "-pre" appears before "-rc" in the config file then 1.0-preXX +is sorted before 1.0-rcXX). The sorting order between different +suffixes is undefined if they are in multiple config files. + +web.browser:: + Specify a web browser that may be used by some commands. + Currently only linkgit:git-instaweb[1] and linkgit:git-help[1] + may use it. diff --git a/Documentation/date-formats.txt b/Documentation/date-formats.txt new file mode 100644 index 0000000..ccd1fc8 --- /dev/null +++ b/Documentation/date-formats.txt @@ -0,0 +1,26 @@ +DATE FORMATS +------------ + +The GIT_AUTHOR_DATE, GIT_COMMITTER_DATE environment variables +ifdef::git-commit[] +and the `--date` option +endif::git-commit[] +support the following date formats: + +Git internal format:: + It is `<unix timestamp> <time zone offset>`, where `<unix + timestamp>` is the number of seconds since the UNIX epoch. + `<time zone offset>` is a positive or negative offset from UTC. + For example CET (which is 2 hours ahead UTC) is `+0200`. + +RFC 2822:: + The standard email format as described by RFC 2822, for example + `Thu, 07 Apr 2005 22:13:13 +0200`. + +ISO 8601:: + Time and date specified by the ISO 8601 standard, for example + `2005-04-07T22:13:13`. The parser accepts a space instead of the + `T` character as well. ++ +NOTE: In addition, the date part is accepted in the following formats: +`YYYY.MM.DD`, `MM/DD/YYYY` and `DD.MM.YYYY`. diff --git a/Documentation/diff-config.txt b/Documentation/diff-config.txt new file mode 100644 index 0000000..6eaa452 --- /dev/null +++ b/Documentation/diff-config.txt @@ -0,0 +1,184 @@ +diff.autoRefreshIndex:: + When using 'git diff' to compare with work tree + files, do not consider stat-only change as changed. + Instead, silently run `git update-index --refresh` to + update the cached stat information for paths whose + contents in the work tree match the contents in the + index. This option defaults to true. Note that this + affects only 'git diff' Porcelain, and not lower level + 'diff' commands such as 'git diff-files'. + +diff.dirstat:: + A comma separated list of `--dirstat` parameters specifying the + default behavior of the `--dirstat` option to linkgit:git-diff[1]` + and friends. The defaults can be overridden on the command line + (using `--dirstat=<param1,param2,...>`). The fallback defaults + (when not changed by `diff.dirstat`) are `changes,noncumulative,3`. + The following parameters are available: ++ +-- +`changes`;; + Compute the dirstat numbers by counting the lines that have been + removed from the source, or added to the destination. This ignores + the amount of pure code movements within a file. In other words, + rearranging lines in a file is not counted as much as other changes. + This is the default behavior when no parameter is given. +`lines`;; + Compute the dirstat numbers by doing the regular line-based diff + analysis, and summing the removed/added line counts. (For binary + files, count 64-byte chunks instead, since binary files have no + natural concept of lines). This is a more expensive `--dirstat` + behavior than the `changes` behavior, but it does count rearranged + lines within a file as much as other changes. The resulting output + is consistent with what you get from the other `--*stat` options. +`files`;; + Compute the dirstat numbers by counting the number of files changed. + Each changed file counts equally in the dirstat analysis. This is + the computationally cheapest `--dirstat` behavior, since it does + not have to look at the file contents at all. +`cumulative`;; + Count changes in a child directory for the parent directory as well. + Note that when using `cumulative`, the sum of the percentages + reported may exceed 100%. The default (non-cumulative) behavior can + be specified with the `noncumulative` parameter. +<limit>;; + An integer parameter specifies a cut-off percent (3% by default). + Directories contributing less than this percentage of the changes + are not shown in the output. +-- ++ +Example: The following will count changed files, while ignoring +directories with less than 10% of the total amount of changed files, +and accumulating child directory counts in the parent directories: +`files,10,cumulative`. + +diff.statGraphWidth:: + Limit the width of the graph part in --stat output. If set, applies + to all commands generating --stat output except format-patch. + +diff.context:: + Generate diffs with <n> lines of context instead of the default + of 3. This value is overridden by the -U option. + +diff.external:: + If this config variable is set, diff generation is not + performed using the internal diff machinery, but using the + given command. Can be overridden with the `GIT_EXTERNAL_DIFF' + environment variable. The command is called with parameters + as described under "git Diffs" in linkgit:git[1]. Note: if + you want to use an external diff program only on a subset of + your files, you might want to use linkgit:gitattributes[5] instead. + +diff.ignoreSubmodules:: + Sets the default value of --ignore-submodules. Note that this + affects only 'git diff' Porcelain, and not lower level 'diff' + commands such as 'git diff-files'. 'git checkout' also honors + this setting when reporting uncommitted changes. Setting it to + 'all' disables the submodule summary normally shown by 'git commit' + and 'git status' when 'status.submoduleSummary' is set unless it is + overridden by using the --ignore-submodules command-line option. + The 'git submodule' commands are not affected by this setting. + +diff.mnemonicPrefix:: + If set, 'git diff' uses a prefix pair that is different from the + standard "a/" and "b/" depending on what is being compared. When + this configuration is in effect, reverse diff output also swaps + the order of the prefixes: +`git diff`;; + compares the (i)ndex and the (w)ork tree; +`git diff HEAD`;; + compares a (c)ommit and the (w)ork tree; +`git diff --cached`;; + compares a (c)ommit and the (i)ndex; +`git diff HEAD:file1 file2`;; + compares an (o)bject and a (w)ork tree entity; +`git diff --no-index a b`;; + compares two non-git things (1) and (2). + +diff.noprefix:: + If set, 'git diff' does not show any source or destination prefix. + +diff.orderFile:: + File indicating how to order files within a diff, using + one shell glob pattern per line. + Can be overridden by the '-O' option to linkgit:git-diff[1]. + +diff.renameLimit:: + The number of files to consider when performing the copy/rename + detection; equivalent to the 'git diff' option '-l'. + +diff.renames:: + Tells Git to detect renames. If set to any boolean value, it + will enable basic rename detection. If set to "copies" or + "copy", it will detect copies, as well. + +diff.suppressBlankEmpty:: + A boolean to inhibit the standard behavior of printing a space + before each empty output line. Defaults to false. + +diff.submodule:: + Specify the format in which differences in submodules are + shown. The "log" format lists the commits in the range like + linkgit:git-submodule[1] `summary` does. The "short" format + format just shows the names of the commits at the beginning + and end of the range. Defaults to short. + +diff.wordRegex:: + A POSIX Extended Regular Expression used to determine what is a "word" + when performing word-by-word difference calculations. Character + sequences that match the regular expression are "words", all other + characters are *ignorable* whitespace. + +diff.<driver>.command:: + The custom diff driver command. See linkgit:gitattributes[5] + for details. + +diff.<driver>.xfuncname:: + The regular expression that the diff driver should use to + recognize the hunk header. A built-in pattern may also be used. + See linkgit:gitattributes[5] for details. + +diff.<driver>.binary:: + Set this option to true to make the diff driver treat files as + binary. See linkgit:gitattributes[5] for details. + +diff.<driver>.textconv:: + The command that the diff driver should call to generate the + text-converted version of a file. The result of the + conversion is used to generate a human-readable diff. See + linkgit:gitattributes[5] for details. + +diff.<driver>.wordRegex:: + The regular expression that the diff driver should use to + split words in a line. See linkgit:gitattributes[5] for + details. + +diff.<driver>.cachetextconv:: + Set this option to true to make the diff driver cache the text + conversion outputs. See linkgit:gitattributes[5] for details. + +diff.tool:: + Controls which diff tool is used by linkgit:git-difftool[1]. + This variable overrides the value configured in `merge.tool`. + The list below shows the valid built-in values. + Any other value is treated as a custom diff tool and requires + that a corresponding difftool.<tool>.cmd variable is defined. + +include::mergetools-diff.txt[] + +diff.algorithm:: + Choose a diff algorithm. The variants are as follows: ++ +-- +`default`, `myers`;; + The basic greedy diff algorithm. Currently, this is the default. +`minimal`;; + Spend extra time to make sure the smallest possible diff is + produced. +`patience`;; + Use "patience diff" algorithm when generating patches. +`histogram`;; + This algorithm extends the patience algorithm to "support + low-occurrence common elements". +-- ++ diff --git a/Documentation/diff-format.txt b/Documentation/diff-format.txt new file mode 100644 index 0000000..85b0890 --- /dev/null +++ b/Documentation/diff-format.txt @@ -0,0 +1,170 @@ +Raw output format +----------------- + +The raw output format from "git-diff-index", "git-diff-tree", +"git-diff-files" and "git diff --raw" are very similar. + +These commands all compare two sets of things; what is +compared differs: + +git-diff-index <tree-ish>:: + compares the <tree-ish> and the files on the filesystem. + +git-diff-index --cached <tree-ish>:: + compares the <tree-ish> and the index. + +git-diff-tree [-r] <tree-ish-1> <tree-ish-2> [<pattern>...]:: + compares the trees named by the two arguments. + +git-diff-files [<pattern>...]:: + compares the index and the files on the filesystem. + +The "git-diff-tree" command begins its output by printing the hash of +what is being compared. After that, all the commands print one output +line per changed file. + +An output line is formatted this way: + +------------------------------------------------ +in-place edit :100644 100644 bcd1234... 0123456... M file0 +copy-edit :100644 100644 abcd123... 1234567... C68 file1 file2 +rename-edit :100644 100644 abcd123... 1234567... R86 file1 file3 +create :000000 100644 0000000... 1234567... A file4 +delete :100644 000000 1234567... 0000000... D file5 +unmerged :000000 000000 0000000... 0000000... U file6 +------------------------------------------------ + +That is, from the left to the right: + +. a colon. +. mode for "src"; 000000 if creation or unmerged. +. a space. +. mode for "dst"; 000000 if deletion or unmerged. +. a space. +. sha1 for "src"; 0\{40\} if creation or unmerged. +. a space. +. sha1 for "dst"; 0\{40\} if creation, unmerged or "look at work tree". +. a space. +. status, followed by optional "score" number. +. a tab or a NUL when '-z' option is used. +. path for "src" +. a tab or a NUL when '-z' option is used; only exists for C or R. +. path for "dst"; only exists for C or R. +. an LF or a NUL when '-z' option is used, to terminate the record. + +Possible status letters are: + +- A: addition of a file +- C: copy of a file into a new one +- D: deletion of a file +- M: modification of the contents or mode of a file +- R: renaming of a file +- T: change in the type of the file +- U: file is unmerged (you must complete the merge before it can +be committed) +- X: "unknown" change type (most probably a bug, please report it) + +Status letters C and R are always followed by a score (denoting the +percentage of similarity between the source and target of the move or +copy). Status letter M may be followed by a score (denoting the +percentage of dissimilarity) for file rewrites. + +<sha1> is shown as all 0's if a file is new on the filesystem +and it is out of sync with the index. + +Example: + +------------------------------------------------ +:100644 100644 5be4a4...... 000000...... M file.c +------------------------------------------------ + +When `-z` option is not used, TAB, LF, and backslash characters +in pathnames are represented as `\t`, `\n`, and `\\`, +respectively. + +diff format for merges +---------------------- + +"git-diff-tree", "git-diff-files" and "git-diff --raw" +can take '-c' or '--cc' option +to generate diff output also for merge commits. The output differs +from the format described above in the following way: + +. there is a colon for each parent +. there are more "src" modes and "src" sha1 +. status is concatenated status characters for each parent +. no optional "score" number +. single path, only for "dst" + +Example: + +------------------------------------------------ +::100644 100644 100644 fabadb8... cc95eb0... 4866510... MM describe.c +------------------------------------------------ + +Note that 'combined diff' lists only files which were modified from +all parents. + + +include::diff-generate-patch.txt[] + + +other diff formats +------------------ + +The `--summary` option describes newly added, deleted, renamed and +copied files. The `--stat` option adds diffstat(1) graph to the +output. These options can be combined with other options, such as +`-p`, and are meant for human consumption. + +When showing a change that involves a rename or a copy, `--stat` output +formats the pathnames compactly by combining common prefix and suffix of +the pathnames. For example, a change that moves `arch/i386/Makefile` to +`arch/x86/Makefile` while modifying 4 lines will be shown like this: + +------------------------------------ +arch/{i386 => x86}/Makefile | 4 +-- +------------------------------------ + +The `--numstat` option gives the diffstat(1) information but is designed +for easier machine consumption. An entry in `--numstat` output looks +like this: + +---------------------------------------- +1 2 README +3 1 arch/{i386 => x86}/Makefile +---------------------------------------- + +That is, from left to right: + +. the number of added lines; +. a tab; +. the number of deleted lines; +. a tab; +. pathname (possibly with rename/copy information); +. a newline. + +When `-z` output option is in effect, the output is formatted this way: + +---------------------------------------- +1 2 README NUL +3 1 NUL arch/i386/Makefile NUL arch/x86/Makefile NUL +---------------------------------------- + +That is: + +. the number of added lines; +. a tab; +. the number of deleted lines; +. a tab; +. a NUL (only exists if renamed/copied); +. pathname in preimage; +. a NUL (only exists if renamed/copied); +. pathname in postimage (only exists if renamed/copied); +. a NUL. + +The extra `NUL` before the preimage path in renamed case is to allow +scripts that read the output to tell if the current record being read is +a single-path record or a rename/copy record without reading ahead. +After reading added and deleted lines, reading up to `NUL` would yield +the pathname, but if that is `NUL`, the record will show two paths. diff --git a/Documentation/diff-generate-patch.txt b/Documentation/diff-generate-patch.txt new file mode 100644 index 0000000..bcf54da --- /dev/null +++ b/Documentation/diff-generate-patch.txt @@ -0,0 +1,185 @@ +Generating patches with -p +-------------------------- + +When "git-diff-index", "git-diff-tree", or "git-diff-files" are run +with a '-p' option, "git diff" without the '--raw' option, or +"git log" with the "-p" option, they +do not produce the output described above; instead they produce a +patch file. You can customize the creation of such patches via the +GIT_EXTERNAL_DIFF and the GIT_DIFF_OPTS environment variables. + +What the -p option produces is slightly different from the traditional +diff format: + +1. It is preceded with a "git diff" header that looks like this: + + diff --git a/file1 b/file2 ++ +The `a/` and `b/` filenames are the same unless rename/copy is +involved. Especially, even for a creation or a deletion, +`/dev/null` is _not_ used in place of the `a/` or `b/` filenames. ++ +When rename/copy is involved, `file1` and `file2` show the +name of the source file of the rename/copy and the name of +the file that rename/copy produces, respectively. + +2. It is followed by one or more extended header lines: + + old mode <mode> + new mode <mode> + deleted file mode <mode> + new file mode <mode> + copy from <path> + copy to <path> + rename from <path> + rename to <path> + similarity index <number> + dissimilarity index <number> + index <hash>..<hash> <mode> ++ +File modes are printed as 6-digit octal numbers including the file type +and file permission bits. ++ +Path names in extended headers do not include the `a/` and `b/` prefixes. ++ +The similarity index is the percentage of unchanged lines, and +the dissimilarity index is the percentage of changed lines. It +is a rounded down integer, followed by a percent sign. The +similarity index value of 100% is thus reserved for two equal +files, while 100% dissimilarity means that no line from the old +file made it into the new one. ++ +The index line includes the SHA-1 checksum before and after the change. +The <mode> is included if the file mode does not change; otherwise, +separate lines indicate the old and the new mode. + +3. TAB, LF, double quote and backslash characters in pathnames + are represented as `\t`, `\n`, `\"` and `\\`, respectively. + If there is need for such substitution then the whole + pathname is put in double quotes. + +4. All the `file1` files in the output refer to files before the + commit, and all the `file2` files refer to files after the commit. + It is incorrect to apply each change to each file sequentially. For + example, this patch will swap a and b: + + diff --git a/a b/b + rename from a + rename to b + diff --git a/b b/a + rename from b + rename to a + + +combined diff format +-------------------- + +Any diff-generating command can take the `-c` or `--cc` option to +produce a 'combined diff' when showing a merge. This is the default +format when showing merges with linkgit:git-diff[1] or +linkgit:git-show[1]. Note also that you can give the `-m` option to any +of these commands to force generation of diffs with individual parents +of a merge. + +A 'combined diff' format looks like this: + +------------ +diff --combined describe.c +index fabadb8,cc95eb0..4866510 +--- a/describe.c ++++ b/describe.c +@@@ -98,20 -98,12 +98,20 @@@ + return (a_date > b_date) ? -1 : (a_date == b_date) ? 0 : 1; + } + +- static void describe(char *arg) + -static void describe(struct commit *cmit, int last_one) +++static void describe(char *arg, int last_one) + { + + unsigned char sha1[20]; + + struct commit *cmit; + struct commit_list *list; + static int initialized = 0; + struct commit_name *n; + + + if (get_sha1(arg, sha1) < 0) + + usage(describe_usage); + + cmit = lookup_commit_reference(sha1); + + if (!cmit) + + usage(describe_usage); + + + if (!initialized) { + initialized = 1; + for_each_ref(get_name); +------------ + +1. It is preceded with a "git diff" header, that looks like + this (when '-c' option is used): + + diff --combined file ++ +or like this (when '--cc' option is used): + + diff --cc file + +2. It is followed by one or more extended header lines + (this example shows a merge with two parents): + + index <hash>,<hash>..<hash> + mode <mode>,<mode>..<mode> + new file mode <mode> + deleted file mode <mode>,<mode> ++ +The `mode <mode>,<mode>..<mode>` line appears only if at least one of +the <mode> is different from the rest. Extended headers with +information about detected contents movement (renames and +copying detection) are designed to work with diff of two +<tree-ish> and are not used by combined diff format. + +3. It is followed by two-line from-file/to-file header + + --- a/file + +++ b/file ++ +Similar to two-line header for traditional 'unified' diff +format, `/dev/null` is used to signal created or deleted +files. + +4. Chunk header format is modified to prevent people from + accidentally feeding it to `patch -p1`. Combined diff format + was created for review of merge commit changes, and was not + meant for apply. The change is similar to the change in the + extended 'index' header: + + @@@ <from-file-range> <from-file-range> <to-file-range> @@@ ++ +There are (number of parents + 1) `@` characters in the chunk +header for combined diff format. + +Unlike the traditional 'unified' diff format, which shows two +files A and B with a single column that has `-` (minus -- +appears in A but removed in B), `+` (plus -- missing in A but +added to B), or `" "` (space -- unchanged) prefix, this format +compares two or more files file1, file2,... with one file X, and +shows how X differs from each of fileN. One column for each of +fileN is prepended to the output line to note how X's line is +different from it. + +A `-` character in the column N means that the line appears in +fileN but it does not appear in the result. A `+` character +in the column N means that the line appears in the result, +and fileN does not have that line (in other words, the line was +added, from the point of view of that parent). + +In the above example output, the function signature was changed +from both files (hence two `-` removals from both file1 and +file2, plus `++` to mean one line that was added does not appear +in either file1 or file2). Also eight other lines are the same +from file1 but do not appear in file2 (hence prefixed with `+`). + +When shown by `git diff-tree -c`, it compares the parents of a +merge commit with the merge result (i.e. file1..fileN are the +parents). When shown by `git diff-files -c`, it compares the +two unresolved merge parents with the working tree file +(i.e. file1 is stage 2 aka "our version", file2 is stage 3 aka +"their version"). diff --git a/Documentation/diff-options.txt b/Documentation/diff-options.txt new file mode 100644 index 0000000..3cb3015 --- /dev/null +++ b/Documentation/diff-options.txt @@ -0,0 +1,563 @@ +// Please don't remove this comment as asciidoc behaves badly when +// the first non-empty line is ifdef/ifndef. The symptom is that +// without this comment the <git-diff-core> attribute conditionally +// defined below ends up being defined unconditionally. +// Last checked with asciidoc 7.0.2. + +ifndef::git-format-patch[] +ifndef::git-diff[] +ifndef::git-log[] +:git-diff-core: 1 +endif::git-log[] +endif::git-diff[] +endif::git-format-patch[] + +ifdef::git-format-patch[] +-p:: +--no-stat:: + Generate plain patches without any diffstats. +endif::git-format-patch[] + +ifndef::git-format-patch[] +-p:: +-u:: +--patch:: + Generate patch (see section on generating patches). +ifdef::git-diff[] + This is the default. +endif::git-diff[] + +-s:: +--no-patch:: + Suppress diff output. Useful for commands like `git show` that + show the patch by default, or to cancel the effect of `--patch`. +endif::git-format-patch[] + +-U<n>:: +--unified=<n>:: + Generate diffs with <n> lines of context instead of + the usual three. +ifndef::git-format-patch[] + Implies `-p`. +endif::git-format-patch[] + +ifndef::git-format-patch[] +--raw:: +ifndef::git-log[] + Generate the diff in raw format. +ifdef::git-diff-core[] + This is the default. +endif::git-diff-core[] +endif::git-log[] +ifdef::git-log[] + For each commit, show a summary of changes using the raw diff + format. See the "RAW OUTPUT FORMAT" section of + linkgit:git-diff[1]. This is different from showing the log + itself in raw format, which you can achieve with + `--format=raw`. +endif::git-log[] +endif::git-format-patch[] + +ifndef::git-format-patch[] +--patch-with-raw:: + Synonym for `-p --raw`. +endif::git-format-patch[] + +--minimal:: + Spend extra time to make sure the smallest possible + diff is produced. + +--patience:: + Generate a diff using the "patience diff" algorithm. + +--histogram:: + Generate a diff using the "histogram diff" algorithm. + +--diff-algorithm={patience|minimal|histogram|myers}:: + Choose a diff algorithm. The variants are as follows: ++ +-- +`default`, `myers`;; + The basic greedy diff algorithm. Currently, this is the default. +`minimal`;; + Spend extra time to make sure the smallest possible diff is + produced. +`patience`;; + Use "patience diff" algorithm when generating patches. +`histogram`;; + This algorithm extends the patience algorithm to "support + low-occurrence common elements". +-- ++ +For instance, if you configured diff.algorithm variable to a +non-default value and want to use the default one, then you +have to use `--diff-algorithm=default` option. + +--stat[=<width>[,<name-width>[,<count>]]]:: + Generate a diffstat. By default, as much space as necessary + will be used for the filename part, and the rest for the graph + part. Maximum width defaults to terminal width, or 80 columns + if not connected to a terminal, and can be overridden by + `<width>`. The width of the filename part can be limited by + giving another width `<name-width>` after a comma. The width + of the graph part can be limited by using + `--stat-graph-width=<width>` (affects all commands generating + a stat graph) or by setting `diff.statGraphWidth=<width>` + (does not affect `git format-patch`). + By giving a third parameter `<count>`, you can limit the + output to the first `<count>` lines, followed by `...` if + there are more. ++ +These parameters can also be set individually with `--stat-width=<width>`, +`--stat-name-width=<name-width>` and `--stat-count=<count>`. + +--numstat:: + Similar to `--stat`, but shows number of added and + deleted lines in decimal notation and pathname without + abbreviation, to make it more machine friendly. For + binary files, outputs two `-` instead of saying + `0 0`. + +--shortstat:: + Output only the last line of the `--stat` format containing total + number of modified files, as well as number of added and deleted + lines. + +--dirstat[=<param1,param2,...>]:: + Output the distribution of relative amount of changes for each + sub-directory. The behavior of `--dirstat` can be customized by + passing it a comma separated list of parameters. + The defaults are controlled by the `diff.dirstat` configuration + variable (see linkgit:git-config[1]). + The following parameters are available: ++ +-- +`changes`;; + Compute the dirstat numbers by counting the lines that have been + removed from the source, or added to the destination. This ignores + the amount of pure code movements within a file. In other words, + rearranging lines in a file is not counted as much as other changes. + This is the default behavior when no parameter is given. +`lines`;; + Compute the dirstat numbers by doing the regular line-based diff + analysis, and summing the removed/added line counts. (For binary + files, count 64-byte chunks instead, since binary files have no + natural concept of lines). This is a more expensive `--dirstat` + behavior than the `changes` behavior, but it does count rearranged + lines within a file as much as other changes. The resulting output + is consistent with what you get from the other `--*stat` options. +`files`;; + Compute the dirstat numbers by counting the number of files changed. + Each changed file counts equally in the dirstat analysis. This is + the computationally cheapest `--dirstat` behavior, since it does + not have to look at the file contents at all. +`cumulative`;; + Count changes in a child directory for the parent directory as well. + Note that when using `cumulative`, the sum of the percentages + reported may exceed 100%. The default (non-cumulative) behavior can + be specified with the `noncumulative` parameter. +<limit>;; + An integer parameter specifies a cut-off percent (3% by default). + Directories contributing less than this percentage of the changes + are not shown in the output. +-- ++ +Example: The following will count changed files, while ignoring +directories with less than 10% of the total amount of changed files, +and accumulating child directory counts in the parent directories: +`--dirstat=files,10,cumulative`. + +--summary:: + Output a condensed summary of extended header information + such as creations, renames and mode changes. + +ifndef::git-format-patch[] +--patch-with-stat:: + Synonym for `-p --stat`. +endif::git-format-patch[] + +ifndef::git-format-patch[] + +-z:: +ifdef::git-log[] + Separate the commits with NULs instead of with new newlines. ++ +Also, when `--raw` or `--numstat` has been given, do not munge +pathnames and use NULs as output field terminators. +endif::git-log[] +ifndef::git-log[] + When `--raw`, `--numstat`, `--name-only` or `--name-status` has been + given, do not munge pathnames and use NULs as output field terminators. +endif::git-log[] ++ +Without this option, each pathname output will have TAB, LF, double quotes, +and backslash characters replaced with `\t`, `\n`, `\"`, and `\\`, +respectively, and the pathname will be enclosed in double quotes if +any of those replacements occurred. + +--name-only:: + Show only names of changed files. + +--name-status:: + Show only names and status of changed files. See the description + of the `--diff-filter` option on what the status letters mean. + +--submodule[=<format>]:: + Specify how differences in submodules are shown. When `--submodule` + or `--submodule=log` is given, the 'log' format is used. This format lists + the commits in the range like linkgit:git-submodule[1] `summary` does. + Omitting the `--submodule` option or specifying `--submodule=short`, + uses the 'short' format. This format just shows the names of the commits + at the beginning and end of the range. Can be tweaked via the + `diff.submodule` configuration variable. + +--color[=<when>]:: + Show colored diff. + `--color` (i.e. without '=<when>') is the same as `--color=always`. + '<when>' can be one of `always`, `never`, or `auto`. +ifdef::git-diff[] + It can be changed by the `color.ui` and `color.diff` + configuration settings. +endif::git-diff[] + +--no-color:: + Turn off colored diff. +ifdef::git-diff[] + This can be used to override configuration settings. +endif::git-diff[] + It is the same as `--color=never`. + +--word-diff[=<mode>]:: + Show a word diff, using the <mode> to delimit changed words. + By default, words are delimited by whitespace; see + `--word-diff-regex` below. The <mode> defaults to 'plain', and + must be one of: ++ +-- +color:: + Highlight changed words using only colors. Implies `--color`. +plain:: + Show words as `[-removed-]` and `{+added+}`. Makes no + attempts to escape the delimiters if they appear in the input, + so the output may be ambiguous. +porcelain:: + Use a special line-based format intended for script + consumption. Added/removed/unchanged runs are printed in the + usual unified diff format, starting with a `+`/`-`/` ` + character at the beginning of the line and extending to the + end of the line. Newlines in the input are represented by a + tilde `~` on a line of its own. +none:: + Disable word diff again. +-- ++ +Note that despite the name of the first mode, color is used to +highlight the changed parts in all modes if enabled. + +--word-diff-regex=<regex>:: + Use <regex> to decide what a word is, instead of considering + runs of non-whitespace to be a word. Also implies + `--word-diff` unless it was already enabled. ++ +Every non-overlapping match of the +<regex> is considered a word. Anything between these matches is +considered whitespace and ignored(!) for the purposes of finding +differences. You may want to append `|[^[:space:]]` to your regular +expression to make sure that it matches all non-whitespace characters. +A match that contains a newline is silently truncated(!) at the +newline. ++ +For example, `--word-diff-regex=.` will treat each character as a word +and, correspondingly, show differences character by character. ++ +The regex can also be set via a diff driver or configuration option, see +linkgit:gitattributes[5] or linkgit:git-config[1]. Giving it explicitly +overrides any diff driver or configuration setting. Diff drivers +override configuration settings. + +--color-words[=<regex>]:: + Equivalent to `--word-diff=color` plus (if a regex was + specified) `--word-diff-regex=<regex>`. +endif::git-format-patch[] + +--no-renames:: + Turn off rename detection, even when the configuration + file gives the default to do so. + +ifndef::git-format-patch[] +--check:: + Warn if changes introduce conflict markers or whitespace errors. + What are considered whitespace errors is controlled by `core.whitespace` + configuration. By default, trailing whitespaces (including + lines that solely consist of whitespaces) and a space character + that is immediately followed by a tab character inside the + initial indent of the line are considered whitespace errors. + Exits with non-zero status if problems are found. Not compatible + with --exit-code. + +--ws-error-highlight=<kind>:: + Highlight whitespace errors on lines specified by <kind> + in the color specified by `color.diff.whitespace`. <kind> + is a comma separated list of `old`, `new`, `context`. When + this option is not given, only whitespace errors in `new` + lines are highlighted. E.g. `--ws-error-highlight=new,old` + highlights whitespace errors on both deleted and added lines. + `all` can be used as a short-hand for `old,new,context`. + +endif::git-format-patch[] + +--full-index:: + Instead of the first handful of characters, show the full + pre- and post-image blob object names on the "index" + line when generating patch format output. + +--binary:: + In addition to `--full-index`, output a binary diff that + can be applied with `git-apply`. + +--abbrev[=<n>]:: + Instead of showing the full 40-byte hexadecimal object + name in diff-raw format output and diff-tree header + lines, show only a partial prefix. This is + independent of the `--full-index` option above, which controls + the diff-patch output format. Non default number of + digits can be specified with `--abbrev=<n>`. + +-B[<n>][/<m>]:: +--break-rewrites[=[<n>][/<m>]]:: + Break complete rewrite changes into pairs of delete and + create. This serves two purposes: ++ +It affects the way a change that amounts to a total rewrite of a file +not as a series of deletion and insertion mixed together with a very +few lines that happen to match textually as the context, but as a +single deletion of everything old followed by a single insertion of +everything new, and the number `m` controls this aspect of the -B +option (defaults to 60%). `-B/70%` specifies that less than 30% of the +original should remain in the result for Git to consider it a total +rewrite (i.e. otherwise the resulting patch will be a series of +deletion and insertion mixed together with context lines). ++ +When used with -M, a totally-rewritten file is also considered as the +source of a rename (usually -M only considers a file that disappeared +as the source of a rename), and the number `n` controls this aspect of +the -B option (defaults to 50%). `-B20%` specifies that a change with +addition and deletion compared to 20% or more of the file's size are +eligible for being picked up as a possible source of a rename to +another file. + +-M[<n>]:: +--find-renames[=<n>]:: +ifndef::git-log[] + Detect renames. +endif::git-log[] +ifdef::git-log[] + If generating diffs, detect and report renames for each commit. + For following files across renames while traversing history, see + `--follow`. +endif::git-log[] + If `n` is specified, it is a threshold on the similarity + index (i.e. amount of addition/deletions compared to the + file's size). For example, `-M90%` means Git should consider a + delete/add pair to be a rename if more than 90% of the file + hasn't changed. Without a `%` sign, the number is to be read as + a fraction, with a decimal point before it. I.e., `-M5` becomes + 0.5, and is thus the same as `-M50%`. Similarly, `-M05` is + the same as `-M5%`. To limit detection to exact renames, use + `-M100%`. The default similarity index is 50%. + +-C[<n>]:: +--find-copies[=<n>]:: + Detect copies as well as renames. See also `--find-copies-harder`. + If `n` is specified, it has the same meaning as for `-M<n>`. + +--find-copies-harder:: + For performance reasons, by default, `-C` option finds copies only + if the original file of the copy was modified in the same + changeset. This flag makes the command + inspect unmodified files as candidates for the source of + copy. This is a very expensive operation for large + projects, so use it with caution. Giving more than one + `-C` option has the same effect. + +-D:: +--irreversible-delete:: + Omit the preimage for deletes, i.e. print only the header but not + the diff between the preimage and `/dev/null`. The resulting patch + is not meant to be applied with `patch` or `git apply`; this is + solely for people who want to just concentrate on reviewing the + text after the change. In addition, the output obviously lack + enough information to apply such a patch in reverse, even manually, + hence the name of the option. ++ +When used together with `-B`, omit also the preimage in the deletion part +of a delete/create pair. + +-l<num>:: + The `-M` and `-C` options require O(n^2) processing time where n + is the number of potential rename/copy targets. This + option prevents rename/copy detection from running if + the number of rename/copy targets exceeds the specified + number. + +ifndef::git-format-patch[] +--diff-filter=[(A|C|D|M|R|T|U|X|B)...[*]]:: + Select only files that are Added (`A`), Copied (`C`), + Deleted (`D`), Modified (`M`), Renamed (`R`), have their + type (i.e. regular file, symlink, submodule, ...) changed (`T`), + are Unmerged (`U`), are + Unknown (`X`), or have had their pairing Broken (`B`). + Any combination of the filter characters (including none) can be used. + When `*` (All-or-none) is added to the combination, all + paths are selected if there is any file that matches + other criteria in the comparison; if there is no file + that matches other criteria, nothing is selected. + +-S<string>:: + Look for differences that change the number of occurrences of + the specified string (i.e. addition/deletion) in a file. + Intended for the scripter's use. ++ +It is useful when you're looking for an exact block of code (like a +struct), and want to know the history of that block since it first +came into being: use the feature iteratively to feed the interesting +block in the preimage back into `-S`, and keep going until you get the +very first version of the block. + +-G<regex>:: + Look for differences whose patch text contains added/removed + lines that match <regex>. ++ +To illustrate the difference between `-S<regex> --pickaxe-regex` and +`-G<regex>`, consider a commit with the following diff in the same +file: ++ +---- ++ return !regexec(regexp, two->ptr, 1, ®match, 0); +... +- hit = !regexec(regexp, mf2.ptr, 1, ®match, 0); +---- ++ +While `git log -G"regexec\(regexp"` will show this commit, `git log +-S"regexec\(regexp" --pickaxe-regex` will not (because the number of +occurrences of that string did not change). ++ +See the 'pickaxe' entry in linkgit:gitdiffcore[7] for more +information. + +--pickaxe-all:: + When `-S` or `-G` finds a change, show all the changes in that + changeset, not just the files that contain the change + in <string>. + +--pickaxe-regex:: + Treat the <string> given to `-S` as an extended POSIX regular + expression to match. +endif::git-format-patch[] + +-O<orderfile>:: + Output the patch in the order specified in the + <orderfile>, which has one shell glob pattern per line. + This overrides the `diff.orderFile` configuration variable + (see linkgit:git-config[1]). To cancel `diff.orderFile`, + use `-O/dev/null`. + +ifndef::git-format-patch[] +-R:: + Swap two inputs; that is, show differences from index or + on-disk file to tree contents. + +--relative[=<path>]:: + When run from a subdirectory of the project, it can be + told to exclude changes outside the directory and show + pathnames relative to it with this option. When you are + not in a subdirectory (e.g. in a bare repository), you + can name which subdirectory to make the output relative + to by giving a <path> as an argument. +endif::git-format-patch[] + +-a:: +--text:: + Treat all files as text. + +--ignore-space-at-eol:: + Ignore changes in whitespace at EOL. + +-b:: +--ignore-space-change:: + Ignore changes in amount of whitespace. This ignores whitespace + at line end, and considers all other sequences of one or + more whitespace characters to be equivalent. + +-w:: +--ignore-all-space:: + Ignore whitespace when comparing lines. This ignores + differences even if one line has whitespace where the other + line has none. + +--ignore-blank-lines:: + Ignore changes whose lines are all blank. + +--inter-hunk-context=<lines>:: + Show the context between diff hunks, up to the specified number + of lines, thereby fusing hunks that are close to each other. + +-W:: +--function-context:: + Show whole surrounding functions of changes. + +ifndef::git-format-patch[] +ifndef::git-log[] +--exit-code:: + Make the program exit with codes similar to diff(1). + That is, it exits with 1 if there were differences and + 0 means no differences. + +--quiet:: + Disable all output of the program. Implies `--exit-code`. +endif::git-log[] +endif::git-format-patch[] + +--ext-diff:: + Allow an external diff helper to be executed. If you set an + external diff driver with linkgit:gitattributes[5], you need + to use this option with linkgit:git-log[1] and friends. + +--no-ext-diff:: + Disallow external diff drivers. + +--textconv:: +--no-textconv:: + Allow (or disallow) external text conversion filters to be run + when comparing binary files. See linkgit:gitattributes[5] for + details. Because textconv filters are typically a one-way + conversion, the resulting diff is suitable for human + consumption, but cannot be applied. For this reason, textconv + filters are enabled by default only for linkgit:git-diff[1] and + linkgit:git-log[1], but not for linkgit:git-format-patch[1] or + diff plumbing commands. + +--ignore-submodules[=<when>]:: + Ignore changes to submodules in the diff generation. <when> can be + either "none", "untracked", "dirty" or "all", which is the default. + Using "none" will consider the submodule modified when it either contains + untracked or modified files or its HEAD differs from the commit recorded + in the superproject and can be used to override any settings of the + 'ignore' option in linkgit:git-config[1] or linkgit:gitmodules[5]. When + "untracked" is used submodules are not considered dirty when they only + contain untracked content (but they are still scanned for modified + content). Using "dirty" ignores all changes to the work tree of submodules, + only changes to the commits stored in the superproject are shown (this was + the behavior until 1.7.0). Using "all" hides all changes to submodules. + +--src-prefix=<prefix>:: + Show the given source prefix instead of "a/". + +--dst-prefix=<prefix>:: + Show the given destination prefix instead of "b/". + +--no-prefix:: + Do not show any source or destination prefix. + +For more detailed explanation on these common options, see also +linkgit:gitdiffcore[7]. diff --git a/Documentation/docbook-xsl.css b/Documentation/docbook-xsl.css new file mode 100644 index 0000000..e11c8f0 --- /dev/null +++ b/Documentation/docbook-xsl.css @@ -0,0 +1,296 @@ +/* + CSS stylesheet for XHTML produced by DocBook XSL stylesheets. + Tested with XSL stylesheets 1.61.2, 1.67.2 +*/ + +span.strong { + font-weight: bold; +} + +body blockquote { + margin-top: .75em; + line-height: 1.5; + margin-bottom: .75em; +} + +html body { + margin: 1em 5% 1em 5%; + line-height: 1.2; + font-family: sans-serif; +} + +body div { + margin: 0; +} + +h1, h2, h3, h4, h5, h6, +div.toc p b, +div.list-of-figures p b, +div.list-of-tables p b, +div.abstract p.title +{ + color: #527bbd; + font-family: tahoma, verdana, sans-serif; +} + +div.toc p:first-child, +div.list-of-figures p:first-child, +div.list-of-tables p:first-child, +div.example p.title +{ + margin-bottom: 0.2em; +} + +body h1 { + margin: .0em 0 0 -4%; + line-height: 1.3; + border-bottom: 2px solid silver; +} + +body h2 { + margin: 0.5em 0 0 -4%; + line-height: 1.3; + border-bottom: 2px solid silver; +} + +body h3 { + margin: .8em 0 0 -3%; + line-height: 1.3; +} + +body h4 { + margin: .8em 0 0 -3%; + line-height: 1.3; +} + +body h5 { + margin: .8em 0 0 -2%; + line-height: 1.3; +} + +body h6 { + margin: .8em 0 0 -1%; + line-height: 1.3; +} + +body hr { + border: none; /* Broken on IE6 */ +} +div.footnotes hr { + border: 1px solid silver; +} + +div.navheader th, div.navheader td, div.navfooter td { + font-family: sans-serif; + font-size: 0.9em; + font-weight: bold; + color: #527bbd; +} +div.navheader img, div.navfooter img { + border-style: none; +} +div.navheader a, div.navfooter a { + font-weight: normal; +} +div.navfooter hr { + border: 1px solid silver; +} + +body td { + line-height: 1.2 +} + +body th { + line-height: 1.2; +} + +ol { + line-height: 1.2; +} + +ul, body dir, body menu { + line-height: 1.2; +} + +html { + margin: 0; + padding: 0; +} + +body h1, body h2, body h3, body h4, body h5, body h6 { + margin-left: 0 +} + +body pre { + margin: 0.5em 10% 0.5em 1em; + line-height: 1.0; + color: navy; +} + +tt.literal, code.literal { + color: navy; + font-family: sans-serif; +} + +code.literal:before { content: "'"; } +code.literal:after { content: "'"; } + +em { + font-style: italic; + color: #064; +} + +div.literallayout p { + padding: 0em; + margin: 0em; +} + +div.literallayout { + font-family: monospace; + margin: 0em; + color: navy; + border: 1px solid silver; + background: #f4f4f4; + padding: 0.5em; +} + +.programlisting, .screen { + border: 1px solid silver; + background: #f4f4f4; + margin: 0.5em 10% 0.5em 0; + padding: 0.5em 1em; +} + +div.sidebar { + background: #ffffee; + margin: 1.0em 10% 0.5em 0; + padding: 0.5em 1em; + border: 1px solid silver; +} +div.sidebar * { padding: 0; } +div.sidebar div { margin: 0; } +div.sidebar p.title { + font-family: sans-serif; + margin-top: 0.5em; + margin-bottom: 0.2em; +} + +div.bibliomixed { + margin: 0.5em 5% 0.5em 1em; +} + +div.glossary dt { + font-weight: bold; +} +div.glossary dd p { + margin-top: 0.2em; +} + +dl { + margin: .8em 0; + line-height: 1.2; +} + +dt { + margin-top: 0.5em; +} + +dt span.term { + font-style: normal; + color: navy; +} + +div.variablelist dd p { + margin-top: 0; +} + +div.itemizedlist li, div.orderedlist li { + margin-left: -0.8em; + margin-top: 0.5em; +} + +ul, ol { + list-style-position: outside; +} + +div.sidebar ul, div.sidebar ol { + margin-left: 2.8em; +} + +div.itemizedlist p.title, +div.orderedlist p.title, +div.variablelist p.title +{ + margin-bottom: -0.8em; +} + +div.revhistory table { + border-collapse: collapse; + border: none; +} +div.revhistory th { + border: none; + color: #527bbd; + font-family: tahoma, verdana, sans-serif; +} +div.revhistory td { + border: 1px solid silver; +} + +/* Keep TOC and index lines close together. */ +div.toc dl, div.toc dt, +div.list-of-figures dl, div.list-of-figures dt, +div.list-of-tables dl, div.list-of-tables dt, +div.indexdiv dl, div.indexdiv dt +{ + line-height: normal; + margin-top: 0; + margin-bottom: 0; +} + +/* + Table styling does not work because of overriding attributes in + generated HTML. +*/ +div.table table, +div.informaltable table +{ + margin-left: 0; + margin-right: 5%; + margin-bottom: 0.8em; +} +div.informaltable table +{ + margin-top: 0.4em +} +div.table thead, +div.table tfoot, +div.table tbody, +div.informaltable thead, +div.informaltable tfoot, +div.informaltable tbody +{ + /* No effect in IE6. */ + border-top: 2px solid #527bbd; + border-bottom: 2px solid #527bbd; +} +div.table thead, div.table tfoot, +div.informaltable thead, div.informaltable tfoot +{ + font-weight: bold; +} + +div.mediaobject img { + border: 1px solid silver; + margin-bottom: 0.8em; +} +div.figure p.title, +div.table p.title +{ + margin-top: 1em; + margin-bottom: 0.4em; +} + +@media print { + div.navheader, div.navfooter { display: none; } +} diff --git a/Documentation/docbook.xsl b/Documentation/docbook.xsl new file mode 100644 index 0000000..da8b05b --- /dev/null +++ b/Documentation/docbook.xsl @@ -0,0 +1,8 @@ +<xsl:stylesheet xmlns:xsl="http://www.w3.org/1999/XSL/Transform" + version='1.0'> + <xsl:import href="http://docbook.sourceforge.net/release/xsl/current/html/docbook.xsl"/> + <xsl:output method="html" + encoding="UTF-8" indent="no" + doctype-public="-//W3C//DTD HTML 4.01//EN" + doctype-system="http://www.w3.org/TR/html4/strict.dtd" /> +</xsl:stylesheet> diff --git a/Documentation/everyday.txto b/Documentation/everyday.txto new file mode 100644 index 0000000..ae555bd --- /dev/null +++ b/Documentation/everyday.txto @@ -0,0 +1,9 @@ +Everyday Git With 20 Commands Or So +=================================== + +This document has been moved to linkgit:giteveryday[7]. + +Please let the owners of the referring site know so that they can update the +link you clicked to get here. + +Thanks. diff --git a/Documentation/fetch-options.txt b/Documentation/fetch-options.txt new file mode 100644 index 0000000..036edfb --- /dev/null +++ b/Documentation/fetch-options.txt @@ -0,0 +1,168 @@ +--all:: + Fetch all remotes. + +-a:: +--append:: + Append ref names and object names of fetched refs to the + existing contents of `.git/FETCH_HEAD`. Without this + option old data in `.git/FETCH_HEAD` will be overwritten. + +--depth=<depth>:: + Limit fetching to the specified number of commits from the tip of + each remote branch history. If fetching to a 'shallow' repository + created by `git clone` with `--depth=<depth>` option (see + linkgit:git-clone[1]), deepen or shorten the history to the specified + number of commits. Tags for the deepened commits are not fetched. + +--unshallow:: + If the source repository is complete, convert a shallow + repository to a complete one, removing all the limitations + imposed by shallow repositories. ++ +If the source repository is shallow, fetch as much as possible so that +the current repository has the same history as the source repository. + +--update-shallow:: + By default when fetching from a shallow repository, + `git fetch` refuses refs that require updating + .git/shallow. This option updates .git/shallow and accept such + refs. + +ifndef::git-pull[] +--dry-run:: + Show what would be done, without making any changes. +endif::git-pull[] + +-f:: +--force:: + When 'git fetch' is used with `<rbranch>:<lbranch>` + refspec, it refuses to update the local branch + `<lbranch>` unless the remote branch `<rbranch>` it + fetches is a descendant of `<lbranch>`. This option + overrides that check. + +-k:: +--keep:: + Keep downloaded pack. + +ifndef::git-pull[] +--multiple:: + Allow several <repository> and <group> arguments to be + specified. No <refspec>s may be specified. + +-p:: +--prune:: + After fetching, remove any remote-tracking references that no + longer exist on the remote. Tags are not subject to pruning + if they are fetched only because of the default tag + auto-following or due to a --tags option. However, if tags + are fetched due to an explicit refspec (either on the command + line or in the remote configuration, for example if the remote + was cloned with the --mirror option), then they are also + subject to pruning. +endif::git-pull[] + +ifndef::git-pull[] +-n:: +endif::git-pull[] +--no-tags:: + By default, tags that point at objects that are downloaded + from the remote repository are fetched and stored locally. + This option disables this automatic tag following. The default + behavior for a remote may be specified with the remote.<name>.tagOpt + setting. See linkgit:git-config[1]. + +ifndef::git-pull[] +--refmap=<refspec>:: + When fetching refs listed on the command line, use the + specified refspec (can be given more than once) to map the + refs to remote-tracking branches, instead of the values of + `remote.*.fetch` configuration variables for the remote + repository. See section on "Configured Remote-tracking + Branches" for details. + +-t:: +--tags:: + Fetch all tags from the remote (i.e., fetch remote tags + `refs/tags/*` into local tags with the same name), in addition + to whatever else would otherwise be fetched. Using this + option alone does not subject tags to pruning, even if --prune + is used (though tags may be pruned anyway if they are also the + destination of an explicit refspec; see '--prune'). + +--recurse-submodules[=yes|on-demand|no]:: + This option controls if and under what conditions new commits of + populated submodules should be fetched too. It can be used as a + boolean option to completely disable recursion when set to 'no' or to + unconditionally recurse into all populated submodules when set to + 'yes', which is the default when this option is used without any + value. Use 'on-demand' to only recurse into a populated submodule + when the superproject retrieves a commit that updates the submodule's + reference to a commit that isn't already in the local submodule + clone. + +-j:: +--jobs=<n>:: + Number of parallel children to be used for fetching submodules. + Each will fetch from different submodules, such that fetching many + submodules will be faster. By default submodules will be fetched + one at a time. + +--no-recurse-submodules:: + Disable recursive fetching of submodules (this has the same effect as + using the '--recurse-submodules=no' option). + +--submodule-prefix=<path>:: + Prepend <path> to paths printed in informative messages + such as "Fetching submodule foo". This option is used + internally when recursing over submodules. + +--recurse-submodules-default=[yes|on-demand]:: + This option is used internally to temporarily provide a + non-negative default value for the --recurse-submodules + option. All other methods of configuring fetch's submodule + recursion (such as settings in linkgit:gitmodules[5] and + linkgit:git-config[1]) override this option, as does + specifying --[no-]recurse-submodules directly. +endif::git-pull[] + +-u:: +--update-head-ok:: + By default 'git fetch' refuses to update the head which + corresponds to the current branch. This flag disables the + check. This is purely for the internal use for 'git pull' + to communicate with 'git fetch', and unless you are + implementing your own Porcelain you are not supposed to + use it. + +--upload-pack <upload-pack>:: + When given, and the repository to fetch from is handled + by 'git fetch-pack', '--exec=<upload-pack>' is passed to + the command to specify non-default path for the command + run on the other end. + +ifndef::git-pull[] +-q:: +--quiet:: + Pass --quiet to git-fetch-pack and silence any other internally + used git commands. Progress is not reported to the standard error + stream. + +-v:: +--verbose:: + Be verbose. +endif::git-pull[] + +--progress:: + Progress status is reported on the standard error stream + by default when it is attached to a terminal, unless -q + is specified. This flag forces progress status even if the + standard error stream is not directed to a terminal. + +-4:: +--ipv4:: + Use IPv4 addresses only, ignoring IPv6 addresses. + +-6:: +--ipv6:: + Use IPv6 addresses only, ignoring IPv4 addresses. diff --git a/Documentation/fix-texi.perl b/Documentation/fix-texi.perl new file mode 100755 index 0000000..ff7d78f --- /dev/null +++ b/Documentation/fix-texi.perl @@ -0,0 +1,15 @@ +#!/usr/bin/perl -w + +while (<>) { + if (/^\@setfilename/) { + $_ = "\@setfilename git.info\n"; + } elsif (/^\@direntry/) { + print '@dircategory Development +@direntry +* Git: (git). A fast distributed revision control system +@end direntry +'; } + unless (/^\@direntry/../^\@end direntry/) { + print; + } +} diff --git a/Documentation/fmt-merge-msg-config.txt b/Documentation/fmt-merge-msg-config.txt new file mode 100644 index 0000000..c73cfa9 --- /dev/null +++ b/Documentation/fmt-merge-msg-config.txt @@ -0,0 +1,10 @@ +merge.branchdesc:: + In addition to branch names, populate the log message with + the branch description text associated with them. Defaults + to false. + +merge.log:: + In addition to branch names, populate the log message with at + most the specified number of one-line descriptions from the + actual commits that are being merged. Defaults to false, and + true is a synonym for 20. diff --git a/Documentation/git-add.txt b/Documentation/git-add.txt new file mode 100644 index 0000000..6a96a66 --- /dev/null +++ b/Documentation/git-add.txt @@ -0,0 +1,411 @@ +git-add(1) +========== + +NAME +---- +git-add - Add file contents to the index + +SYNOPSIS +-------- +[verse] +'git add' [--verbose | -v] [--dry-run | -n] [--force | -f] [--interactive | -i] [--patch | -p] + [--edit | -e] [--[no-]all | --[no-]ignore-removal | [--update | -u]] + [--intent-to-add | -N] [--refresh] [--ignore-errors] [--ignore-missing] + [--] [<pathspec>...] + +DESCRIPTION +----------- +This command updates the index using the current content found in +the working tree, to prepare the content staged for the next commit. +It typically adds the current content of existing paths as a whole, +but with some options it can also be used to add content with +only part of the changes made to the working tree files applied, or +remove paths that do not exist in the working tree anymore. + +The "index" holds a snapshot of the content of the working tree, and it +is this snapshot that is taken as the contents of the next commit. Thus +after making any changes to the working tree, and before running +the commit command, you must use the `add` command to add any new or +modified files to the index. + +This command can be performed multiple times before a commit. It only +adds the content of the specified file(s) at the time the add command is +run; if you want subsequent changes included in the next commit, then +you must run `git add` again to add the new content to the index. + +The `git status` command can be used to obtain a summary of which +files have changes that are staged for the next commit. + +The `git add` command will not add ignored files by default. If any +ignored files were explicitly specified on the command line, `git add` +will fail with a list of ignored files. Ignored files reached by +directory recursion or filename globbing performed by Git (quote your +globs before the shell) will be silently ignored. The 'git add' command can +be used to add ignored files with the `-f` (force) option. + +Please see linkgit:git-commit[1] for alternative ways to add content to a +commit. + + +OPTIONS +------- +<pathspec>...:: + Files to add content from. Fileglobs (e.g. `*.c`) can + be given to add all matching files. Also a + leading directory name (e.g. `dir` to add `dir/file1` + and `dir/file2`) can be given to update the index to + match the current state of the directory as a whole (e.g. + specifying `dir` will record not just a file `dir/file1` + modified in the working tree, a file `dir/file2` added to + the working tree, but also a file `dir/file3` removed from + the working tree. Note that older versions of Git used + to ignore removed files; use `--no-all` option if you want + to add modified or new files but ignore removed ones. + +-n:: +--dry-run:: + Don't actually add the file(s), just show if they exist and/or will + be ignored. + +-v:: +--verbose:: + Be verbose. + +-f:: +--force:: + Allow adding otherwise ignored files. + +-i:: +--interactive:: + Add modified contents in the working tree interactively to + the index. Optional path arguments may be supplied to limit + operation to a subset of the working tree. See ``Interactive + mode'' for details. + +-p:: +--patch:: + Interactively choose hunks of patch between the index and the + work tree and add them to the index. This gives the user a chance + to review the difference before adding modified contents to the + index. ++ +This effectively runs `add --interactive`, but bypasses the +initial command menu and directly jumps to the `patch` subcommand. +See ``Interactive mode'' for details. + +-e:: +--edit:: + Open the diff vs. the index in an editor and let the user + edit it. After the editor was closed, adjust the hunk headers + and apply the patch to the index. ++ +The intent of this option is to pick and choose lines of the patch to +apply, or even to modify the contents of lines to be staged. This can be +quicker and more flexible than using the interactive hunk selector. +However, it is easy to confuse oneself and create a patch that does not +apply to the index. See EDITING PATCHES below. + +-u:: +--update:: + Update the index just where it already has an entry matching + <pathspec>. This removes as well as modifies index entries to + match the working tree, but adds no new files. ++ +If no <pathspec> is given when `-u` option is used, all +tracked files in the entire working tree are updated (old versions +of Git used to limit the update to the current directory and its +subdirectories). + +-A:: +--all:: +--no-ignore-removal:: + Update the index not only where the working tree has a file + matching <pathspec> but also where the index already has an + entry. This adds, modifies, and removes index entries to + match the working tree. ++ +If no <pathspec> is given when `-A` option is used, all +files in the entire working tree are updated (old versions +of Git used to limit the update to the current directory and its +subdirectories). + +--no-all:: +--ignore-removal:: + Update the index by adding new files that are unknown to the + index and files modified in the working tree, but ignore + files that have been removed from the working tree. This + option is a no-op when no <pathspec> is used. ++ +This option is primarily to help users who are used to older +versions of Git, whose "git add <pathspec>..." was a synonym +for "git add --no-all <pathspec>...", i.e. ignored removed files. + +-N:: +--intent-to-add:: + Record only the fact that the path will be added later. An entry + for the path is placed in the index with no content. This is + useful for, among other things, showing the unstaged content of + such files with `git diff` and committing them with `git commit + -a`. + +--refresh:: + Don't add the file(s), but only refresh their stat() + information in the index. + +--ignore-errors:: + If some files could not be added because of errors indexing + them, do not abort the operation, but continue adding the + others. The command shall still exit with non-zero status. + The configuration variable `add.ignoreErrors` can be set to + true to make this the default behaviour. + +--ignore-missing:: + This option can only be used together with --dry-run. By using + this option the user can check if any of the given files would + be ignored, no matter if they are already present in the work + tree or not. + +\--:: + This option can be used to separate command-line options from + the list of files, (useful when filenames might be mistaken + for command-line options). + + +Configuration +------------- + +The optional configuration variable `core.excludesFile` indicates a path to a +file containing patterns of file names to exclude from git-add, similar to +$GIT_DIR/info/exclude. Patterns in the exclude file are used in addition to +those in info/exclude. See linkgit:gitignore[5]. + + +EXAMPLES +-------- + +* Adds content from all `*.txt` files under `Documentation` directory +and its subdirectories: ++ +------------ +$ git add Documentation/\*.txt +------------ ++ +Note that the asterisk `*` is quoted from the shell in this +example; this lets the command include the files from +subdirectories of `Documentation/` directory. + +* Considers adding content from all git-*.sh scripts: ++ +------------ +$ git add git-*.sh +------------ ++ +Because this example lets the shell expand the asterisk (i.e. you are +listing the files explicitly), it does not consider +`subdir/git-foo.sh`. + +Interactive mode +---------------- +When the command enters the interactive mode, it shows the +output of the 'status' subcommand, and then goes into its +interactive command loop. + +The command loop shows the list of subcommands available, and +gives a prompt "What now> ". In general, when the prompt ends +with a single '>', you can pick only one of the choices given +and type return, like this: + +------------ + *** Commands *** + 1: status 2: update 3: revert 4: add untracked + 5: patch 6: diff 7: quit 8: help + What now> 1 +------------ + +You also could say `s` or `sta` or `status` above as long as the +choice is unique. + +The main command loop has 6 subcommands (plus help and quit). + +status:: + + This shows the change between HEAD and index (i.e. what will be + committed if you say `git commit`), and between index and + working tree files (i.e. what you could stage further before + `git commit` using `git add`) for each path. A sample output + looks like this: ++ +------------ + staged unstaged path + 1: binary nothing foo.png + 2: +403/-35 +1/-1 git-add--interactive.perl +------------ ++ +It shows that foo.png has differences from HEAD (but that is +binary so line count cannot be shown) and there is no +difference between indexed copy and the working tree +version (if the working tree version were also different, +'binary' would have been shown in place of 'nothing'). The +other file, git-add{litdd}interactive.perl, has 403 lines added +and 35 lines deleted if you commit what is in the index, but +working tree file has further modifications (one addition and +one deletion). + +update:: + + This shows the status information and issues an "Update>>" + prompt. When the prompt ends with double '>>', you can + make more than one selection, concatenated with whitespace or + comma. Also you can say ranges. E.g. "2-5 7,9" to choose + 2,3,4,5,7,9 from the list. If the second number in a range is + omitted, all remaining patches are taken. E.g. "7-" to choose + 7,8,9 from the list. You can say '*' to choose everything. ++ +What you chose are then highlighted with '*', +like this: ++ +------------ + staged unstaged path + 1: binary nothing foo.png +* 2: +403/-35 +1/-1 git-add--interactive.perl +------------ ++ +To remove selection, prefix the input with `-` +like this: ++ +------------ +Update>> -2 +------------ ++ +After making the selection, answer with an empty line to stage the +contents of working tree files for selected paths in the index. + +revert:: + + This has a very similar UI to 'update', and the staged + information for selected paths are reverted to that of the + HEAD version. Reverting new paths makes them untracked. + +add untracked:: + + This has a very similar UI to 'update' and + 'revert', and lets you add untracked paths to the index. + +patch:: + + This lets you choose one path out of a 'status' like selection. + After choosing the path, it presents the diff between the index + and the working tree file and asks you if you want to stage + the change of each hunk. You can select one of the following + options and type return: + + y - stage this hunk + n - do not stage this hunk + q - quit; do not stage this hunk or any of the remaining ones + a - stage this hunk and all later hunks in the file + d - do not stage this hunk or any of the later hunks in the file + g - select a hunk to go to + / - search for a hunk matching the given regex + j - leave this hunk undecided, see next undecided hunk + J - leave this hunk undecided, see next hunk + k - leave this hunk undecided, see previous undecided hunk + K - leave this hunk undecided, see previous hunk + s - split the current hunk into smaller hunks + e - manually edit the current hunk + ? - print help ++ +After deciding the fate for all hunks, if there is any hunk +that was chosen, the index is updated with the selected hunks. ++ +You can omit having to type return here, by setting the configuration +variable `interactive.singleKey` to `true`. + +diff:: + + This lets you review what will be committed (i.e. between + HEAD and index). + + +EDITING PATCHES +--------------- + +Invoking `git add -e` or selecting `e` from the interactive hunk +selector will open a patch in your editor; after the editor exits, the +result is applied to the index. You are free to make arbitrary changes +to the patch, but note that some changes may have confusing results, or +even result in a patch that cannot be applied. If you want to abort the +operation entirely (i.e., stage nothing new in the index), simply delete +all lines of the patch. The list below describes some common things you +may see in a patch, and which editing operations make sense on them. + +-- +added content:: + +Added content is represented by lines beginning with "{plus}". You can +prevent staging any addition lines by deleting them. + +removed content:: + +Removed content is represented by lines beginning with "-". You can +prevent staging their removal by converting the "-" to a " " (space). + +modified content:: + +Modified content is represented by "-" lines (removing the old content) +followed by "{plus}" lines (adding the replacement content). You can +prevent staging the modification by converting "-" lines to " ", and +removing "{plus}" lines. Beware that modifying only half of the pair is +likely to introduce confusing changes to the index. +-- + +There are also more complex operations that can be performed. But beware +that because the patch is applied only to the index and not the working +tree, the working tree will appear to "undo" the change in the index. +For example, introducing a new line into the index that is in neither +the HEAD nor the working tree will stage the new line for commit, but +the line will appear to be reverted in the working tree. + +Avoid using these constructs, or do so with extreme caution. + +-- +removing untouched content:: + +Content which does not differ between the index and working tree may be +shown on context lines, beginning with a " " (space). You can stage +context lines for removal by converting the space to a "-". The +resulting working tree file will appear to re-add the content. + +modifying existing content:: + +One can also modify context lines by staging them for removal (by +converting " " to "-") and adding a "{plus}" line with the new content. +Similarly, one can modify "{plus}" lines for existing additions or +modifications. In all cases, the new modification will appear reverted +in the working tree. + +new content:: + +You may also add new content that does not exist in the patch; simply +add new lines, each starting with "{plus}". The addition will appear +reverted in the working tree. +-- + +There are also several operations which should be avoided entirely, as +they will make the patch impossible to apply: + +* adding context (" ") or removal ("-") lines +* deleting context or removal lines +* modifying the contents of context or removal lines + +SEE ALSO +-------- +linkgit:git-status[1] +linkgit:git-rm[1] +linkgit:git-reset[1] +linkgit:git-mv[1] +linkgit:git-commit[1] +linkgit:git-update-index[1] + +GIT +--- +Part of the linkgit:git[1] suite diff --git a/Documentation/git-am.txt b/Documentation/git-am.txt new file mode 100644 index 0000000..13cdd7f --- /dev/null +++ b/Documentation/git-am.txt @@ -0,0 +1,231 @@ +git-am(1) +========= + +NAME +---- +git-am - Apply a series of patches from a mailbox + + +SYNOPSIS +-------- +[verse] +'git am' [--signoff] [--keep] [--[no-]keep-cr] [--[no-]utf8] + [--[no-]3way] [--interactive] [--committer-date-is-author-date] + [--ignore-date] [--ignore-space-change | --ignore-whitespace] + [--whitespace=<option>] [-C<n>] [-p<n>] [--directory=<dir>] + [--exclude=<path>] [--include=<path>] [--reject] [-q | --quiet] + [--[no-]scissors] [-S[<keyid>]] [--patch-format=<format>] + [(<mbox> | <Maildir>)...] +'git am' (--continue | --skip | --abort) + +DESCRIPTION +----------- +Splits mail messages in a mailbox into commit log message, +authorship information and patches, and applies them to the +current branch. + +OPTIONS +------- +(<mbox>|<Maildir>)...:: + The list of mailbox files to read patches from. If you do not + supply this argument, the command reads from the standard input. + If you supply directories, they will be treated as Maildirs. + +-s:: +--signoff:: + Add a `Signed-off-by:` line to the commit message, using + the committer identity of yourself. + See the signoff option in linkgit:git-commit[1] for more information. + +-k:: +--keep:: + Pass `-k` flag to 'git mailinfo' (see linkgit:git-mailinfo[1]). + +--keep-non-patch:: + Pass `-b` flag to 'git mailinfo' (see linkgit:git-mailinfo[1]). + +--[no-]keep-cr:: + With `--keep-cr`, call 'git mailsplit' (see linkgit:git-mailsplit[1]) + with the same option, to prevent it from stripping CR at the end of + lines. `am.keepcr` configuration variable can be used to specify the + default behaviour. `--no-keep-cr` is useful to override `am.keepcr`. + +-c:: +--scissors:: + Remove everything in body before a scissors line (see + linkgit:git-mailinfo[1]). Can be activated by default using + the `mailinfo.scissors` configuration variable. + +--no-scissors:: + Ignore scissors lines (see linkgit:git-mailinfo[1]). + +-m:: +--message-id:: + Pass the `-m` flag to 'git mailinfo' (see linkgit:git-mailinfo[1]), + so that the Message-ID header is added to the commit message. + The `am.messageid` configuration variable can be used to specify + the default behaviour. + +--no-message-id:: + Do not add the Message-ID header to the commit message. + `no-message-id` is useful to override `am.messageid`. + +-q:: +--quiet:: + Be quiet. Only print error messages. + +-u:: +--utf8:: + Pass `-u` flag to 'git mailinfo' (see linkgit:git-mailinfo[1]). + The proposed commit log message taken from the e-mail + is re-coded into UTF-8 encoding (configuration variable + `i18n.commitencoding` can be used to specify project's + preferred encoding if it is not UTF-8). ++ +This was optional in prior versions of git, but now it is the +default. You can use `--no-utf8` to override this. + +--no-utf8:: + Pass `-n` flag to 'git mailinfo' (see + linkgit:git-mailinfo[1]). + +-3:: +--3way:: +--no-3way:: + When the patch does not apply cleanly, fall back on + 3-way merge if the patch records the identity of blobs + it is supposed to apply to and we have those blobs + available locally. `--no-3way` can be used to override + am.threeWay configuration variable. For more information, + see am.threeWay in linkgit:git-config[1]. + +--ignore-space-change:: +--ignore-whitespace:: +--whitespace=<option>:: +-C<n>:: +-p<n>:: +--directory=<dir>:: +--exclude=<path>:: +--include=<path>:: +--reject:: + These flags are passed to the 'git apply' (see linkgit:git-apply[1]) + program that applies + the patch. + +--patch-format:: + By default the command will try to detect the patch format + automatically. This option allows the user to bypass the automatic + detection and specify the patch format that the patch(es) should be + interpreted as. Valid formats are mbox, stgit, stgit-series and hg. + +-i:: +--interactive:: + Run interactively. + +--committer-date-is-author-date:: + By default the command records the date from the e-mail + message as the commit author date, and uses the time of + commit creation as the committer date. This allows the + user to lie about the committer date by using the same + value as the author date. + +--ignore-date:: + By default the command records the date from the e-mail + message as the commit author date, and uses the time of + commit creation as the committer date. This allows the + user to lie about the author date by using the same + value as the committer date. + +--skip:: + Skip the current patch. This is only meaningful when + restarting an aborted patch. + +-S[<keyid>]:: +--gpg-sign[=<keyid>]:: + GPG-sign commits. The `keyid` argument is optional and + defaults to the committer identity; if specified, it must be + stuck to the option without a space. + +--continue:: +-r:: +--resolved:: + After a patch failure (e.g. attempting to apply + conflicting patch), the user has applied it by hand and + the index file stores the result of the application. + Make a commit using the authorship and commit log + extracted from the e-mail message and the current index + file, and continue. + +--resolvemsg=<msg>:: + When a patch failure occurs, <msg> will be printed + to the screen before exiting. This overrides the + standard message informing you to use `--continue` + or `--skip` to handle the failure. This is solely + for internal use between 'git rebase' and 'git am'. + +--abort:: + Restore the original branch and abort the patching operation. + +DISCUSSION +---------- + +The commit author name is taken from the "From: " line of the +message, and commit author date is taken from the "Date: " line +of the message. The "Subject: " line is used as the title of +the commit, after stripping common prefix "[PATCH <anything>]". +The "Subject: " line is supposed to concisely describe what the +commit is about in one line of text. + +"From: " and "Subject: " lines starting the body override the respective +commit author name and title values taken from the headers. + +The commit message is formed by the title taken from the +"Subject: ", a blank line and the body of the message up to +where the patch begins. Excess whitespace at the end of each +line is automatically stripped. + +The patch is expected to be inline, directly following the +message. Any line that is of the form: + +* three-dashes and end-of-line, or +* a line that begins with "diff -", or +* a line that begins with "Index: " + +is taken as the beginning of a patch, and the commit log message +is terminated before the first occurrence of such a line. + +When initially invoking `git am`, you give it the names of the mailboxes +to process. Upon seeing the first patch that does not apply, it +aborts in the middle. You can recover from this in one of two ways: + +. skip the current patch by re-running the command with the '--skip' + option. + +. hand resolve the conflict in the working directory, and update + the index file to bring it into a state that the patch should + have produced. Then run the command with the '--continue' option. + +The command refuses to process new mailboxes until the current +operation is finished, so if you decide to start over from scratch, +run `git am --abort` before running the command with mailbox +names. + +Before any patches are applied, ORIG_HEAD is set to the tip of the +current branch. This is useful if you have problems with multiple +commits, like running 'git am' on the wrong branch or an error in the +commits that is more easily fixed by changing the mailbox (e.g. +errors in the "From:" lines). + +HOOKS +----- +This command can run `applypatch-msg`, `pre-applypatch`, +and `post-applypatch` hooks. See linkgit:githooks[5] for more +information. + +SEE ALSO +-------- +linkgit:git-apply[1]. + +GIT +--- +Part of the linkgit:git[1] suite diff --git a/Documentation/git-annotate.txt b/Documentation/git-annotate.txt new file mode 100644 index 0000000..05fd482 --- /dev/null +++ b/Documentation/git-annotate.txt @@ -0,0 +1,33 @@ +git-annotate(1) +=============== + +NAME +---- +git-annotate - Annotate file lines with commit information + +SYNOPSIS +-------- +[verse] +'git annotate' [options] file [revision] + +DESCRIPTION +----------- +Annotates each line in the given file with information from the commit +which introduced the line. Optionally annotates from a given revision. + +The only difference between this command and linkgit:git-blame[1] is that +they use slightly different output formats, and this command exists only +for backward compatibility to support existing scripts, and provide a more +familiar command name for people coming from other SCM systems. + +OPTIONS +------- +include::blame-options.txt[] + +SEE ALSO +-------- +linkgit:git-blame[1] + +GIT +--- +Part of the linkgit:git[1] suite diff --git a/Documentation/git-apply.txt b/Documentation/git-apply.txt new file mode 100644 index 0000000..8ddb207 --- /dev/null +++ b/Documentation/git-apply.txt @@ -0,0 +1,276 @@ +git-apply(1) +============ + +NAME +---- +git-apply - Apply a patch to files and/or to the index + + +SYNOPSIS +-------- +[verse] +'git apply' [--stat] [--numstat] [--summary] [--check] [--index] [--3way] + [--apply] [--no-add] [--build-fake-ancestor=<file>] [-R | --reverse] + [--allow-binary-replacement | --binary] [--reject] [-z] + [-p<n>] [-C<n>] [--inaccurate-eof] [--recount] [--cached] + [--ignore-space-change | --ignore-whitespace] + [--whitespace=(nowarn|warn|fix|error|error-all)] + [--exclude=<path>] [--include=<path>] [--directory=<root>] + [--verbose] [--unsafe-paths] [<patch>...] + +DESCRIPTION +----------- +Reads the supplied diff output (i.e. "a patch") and applies it to files. +When running from a subdirectory in a repository, patched paths +outside the directory are ignored. +With the `--index` option the patch is also applied to the index, and +with the `--cached` option the patch is only applied to the index. +Without these options, the command applies the patch only to files, +and does not require them to be in a Git repository. + +This command applies the patch but does not create a commit. Use +linkgit:git-am[1] to create commits from patches generated by +linkgit:git-format-patch[1] and/or received by email. + +OPTIONS +------- +<patch>...:: + The files to read the patch from. '-' can be used to read + from the standard input. + +--stat:: + Instead of applying the patch, output diffstat for the + input. Turns off "apply". + +--numstat:: + Similar to `--stat`, but shows the number of added and + deleted lines in decimal notation and the pathname without + abbreviation, to make it more machine friendly. For + binary files, outputs two `-` instead of saying + `0 0`. Turns off "apply". + +--summary:: + Instead of applying the patch, output a condensed + summary of information obtained from git diff extended + headers, such as creations, renames and mode changes. + Turns off "apply". + +--check:: + Instead of applying the patch, see if the patch is + applicable to the current working tree and/or the index + file and detects errors. Turns off "apply". + +--index:: + When `--check` is in effect, or when applying the patch + (which is the default when none of the options that + disables it is in effect), make sure the patch is + applicable to what the current index file records. If + the file to be patched in the working tree is not + up-to-date, it is flagged as an error. This flag also + causes the index file to be updated. + +--cached:: + Apply a patch without touching the working tree. Instead take the + cached data, apply the patch, and store the result in the index + without using the working tree. This implies `--index`. + +-3:: +--3way:: + When the patch does not apply cleanly, fall back on 3-way merge if + the patch records the identity of blobs it is supposed to apply to, + and we have those blobs available locally, possibly leaving the + conflict markers in the files in the working tree for the user to + resolve. This option implies the `--index` option, and is incompatible + with the `--reject` and the `--cached` options. + +--build-fake-ancestor=<file>:: + Newer 'git diff' output has embedded 'index information' + for each blob to help identify the original version that + the patch applies to. When this flag is given, and if + the original versions of the blobs are available locally, + builds a temporary index containing those blobs. ++ +When a pure mode change is encountered (which has no index information), +the information is read from the current index instead. + +-R:: +--reverse:: + Apply the patch in reverse. + +--reject:: + For atomicity, 'git apply' by default fails the whole patch and + does not touch the working tree when some of the hunks + do not apply. This option makes it apply + the parts of the patch that are applicable, and leave the + rejected hunks in corresponding *.rej files. + +-z:: + When `--numstat` has been given, do not munge pathnames, + but use a NUL-terminated machine-readable format. ++ +Without this option, each pathname output will have TAB, LF, double quotes, +and backslash characters replaced with `\t`, `\n`, `\"`, and `\\`, +respectively, and the pathname will be enclosed in double quotes if +any of those replacements occurred. + +-p<n>:: + Remove <n> leading slashes from traditional diff paths. The + default is 1. + +-C<n>:: + Ensure at least <n> lines of surrounding context match before + and after each change. When fewer lines of surrounding + context exist they all must match. By default no context is + ever ignored. + +--unidiff-zero:: + By default, 'git apply' expects that the patch being + applied is a unified diff with at least one line of context. + This provides good safety measures, but breaks down when + applying a diff generated with `--unified=0`. To bypass these + checks use `--unidiff-zero`. ++ +Note, for the reasons stated above usage of context-free patches is +discouraged. + +--apply:: + If you use any of the options marked "Turns off + 'apply'" above, 'git apply' reads and outputs the + requested information without actually applying the + patch. Give this flag after those flags to also apply + the patch. + +--no-add:: + When applying a patch, ignore additions made by the + patch. This can be used to extract the common part between + two files by first running 'diff' on them and applying + the result with this option, which would apply the + deletion part but not the addition part. + +--allow-binary-replacement:: +--binary:: + Historically we did not allow binary patch applied + without an explicit permission from the user, and this + flag was the way to do so. Currently we always allow binary + patch application, so this is a no-op. + +--exclude=<path-pattern>:: + Don't apply changes to files matching the given path pattern. This can + be useful when importing patchsets, where you want to exclude certain + files or directories. + +--include=<path-pattern>:: + Apply changes to files matching the given path pattern. This can + be useful when importing patchsets, where you want to include certain + files or directories. ++ +When `--exclude` and `--include` patterns are used, they are examined in the +order they appear on the command line, and the first match determines if a +patch to each path is used. A patch to a path that does not match any +include/exclude pattern is used by default if there is no include pattern +on the command line, and ignored if there is any include pattern. + +--ignore-space-change:: +--ignore-whitespace:: + When applying a patch, ignore changes in whitespace in context + lines if necessary. + Context lines will preserve their whitespace, and they will not + undergo whitespace fixing regardless of the value of the + `--whitespace` option. New lines will still be fixed, though. + +--whitespace=<action>:: + When applying a patch, detect a new or modified line that has + whitespace errors. What are considered whitespace errors is + controlled by `core.whitespace` configuration. By default, + trailing whitespaces (including lines that solely consist of + whitespaces) and a space character that is immediately followed + by a tab character inside the initial indent of the line are + considered whitespace errors. ++ +By default, the command outputs warning messages but applies the patch. +When `git-apply` is used for statistics and not applying a +patch, it defaults to `nowarn`. ++ +You can use different `<action>` values to control this +behavior: ++ +* `nowarn` turns off the trailing whitespace warning. +* `warn` outputs warnings for a few such errors, but applies the + patch as-is (default). +* `fix` outputs warnings for a few such errors, and applies the + patch after fixing them (`strip` is a synonym --- the tool + used to consider only trailing whitespace characters as errors, and the + fix involved 'stripping' them, but modern Gits do more). +* `error` outputs warnings for a few such errors, and refuses + to apply the patch. +* `error-all` is similar to `error` but shows all errors. + +--inaccurate-eof:: + Under certain circumstances, some versions of 'diff' do not correctly + detect a missing new-line at the end of the file. As a result, patches + created by such 'diff' programs do not record incomplete lines + correctly. This option adds support for applying such patches by + working around this bug. + +-v:: +--verbose:: + Report progress to stderr. By default, only a message about the + current patch being applied will be printed. This option will cause + additional information to be reported. + +--recount:: + Do not trust the line counts in the hunk headers, but infer them + by inspecting the patch (e.g. after editing the patch without + adjusting the hunk headers appropriately). + +--directory=<root>:: + Prepend <root> to all filenames. If a "-p" argument was also passed, + it is applied before prepending the new root. ++ +For example, a patch that talks about updating `a/git-gui.sh` to `b/git-gui.sh` +can be applied to the file in the working tree `modules/git-gui/git-gui.sh` by +running `git apply --directory=modules/git-gui`. + +--unsafe-paths:: + By default, a patch that affects outside the working area + (either a Git controlled working tree, or the current working + directory when "git apply" is used as a replacement of GNU + patch) is rejected as a mistake (or a mischief). ++ +When `git apply` is used as a "better GNU patch", the user can pass +the `--unsafe-paths` option to override this safety check. This option +has no effect when `--index` or `--cached` is in use. + +Configuration +------------- + +apply.ignoreWhitespace:: + Set to 'change' if you want changes in whitespace to be ignored by default. + Set to one of: no, none, never, false if you want changes in + whitespace to be significant. +apply.whitespace:: + When no `--whitespace` flag is given from the command + line, this configuration item is used as the default. + +Submodules +---------- +If the patch contains any changes to submodules then 'git apply' +treats these changes as follows. + +If `--index` is specified (explicitly or implicitly), then the submodule +commits must match the index exactly for the patch to apply. If any +of the submodules are checked-out, then these check-outs are completely +ignored, i.e., they are not required to be up-to-date or clean and they +are not updated. + +If `--index` is not specified, then the submodule commits in the patch +are ignored and only the absence or presence of the corresponding +subdirectory is checked and (if possible) updated. + +SEE ALSO +-------- +linkgit:git-am[1]. + +GIT +--- +Part of the linkgit:git[1] suite diff --git a/Documentation/git-archimport.txt b/Documentation/git-archimport.txt new file mode 100644 index 0000000..163b9f6 --- /dev/null +++ b/Documentation/git-archimport.txt @@ -0,0 +1,112 @@ +git-archimport(1) +================= + +NAME +---- +git-archimport - Import an Arch repository into Git + + +SYNOPSIS +-------- +[verse] +'git archimport' [-h] [-v] [-o] [-a] [-f] [-T] [-D depth] [-t tempdir] + <archive/branch>[:<git-branch>] ... + +DESCRIPTION +----------- +Imports a project from one or more Arch repositories. It will follow branches +and repositories within the namespaces defined by the <archive/branch> +parameters supplied. If it cannot find the remote branch a merge comes from +it will just import it as a regular commit. If it can find it, it will mark it +as a merge whenever possible (see discussion below). + +The script expects you to provide the key roots where it can start the import +from an 'initial import' or 'tag' type of Arch commit. It will follow and +import new branches within the provided roots. + +It expects to be dealing with one project only. If it sees +branches that have different roots, it will refuse to run. In that case, +edit your <archive/branch> parameters to define clearly the scope of the +import. + +'git archimport' uses `tla` extensively in the background to access the +Arch repository. +Make sure you have a recent version of `tla` available in the path. `tla` must +know about the repositories you pass to 'git archimport'. + +For the initial import, 'git archimport' expects to find itself in an empty +directory. To follow the development of a project that uses Arch, rerun +'git archimport' with the same parameters as the initial import to perform +incremental imports. + +While 'git archimport' will try to create sensible branch names for the +archives that it imports, it is also possible to specify Git branch names +manually. To do so, write a Git branch name after each <archive/branch> +parameter, separated by a colon. This way, you can shorten the Arch +branch names and convert Arch jargon to Git jargon, for example mapping a +"PROJECT{litdd}devo{litdd}VERSION" branch to "master". + +Associating multiple Arch branches to one Git branch is possible; the +result will make the most sense only if no commits are made to the first +branch, after the second branch is created. Still, this is useful to +convert Arch repositories that had been rotated periodically. + + +MERGES +------ +Patch merge data from Arch is used to mark merges in Git as well. Git +does not care much about tracking patches, and only considers a merge when a +branch incorporates all the commits since the point they forked. The end result +is that Git will have a good idea of how far branches have diverged. So the +import process does lose some patch-trading metadata. + +Fortunately, when you try and merge branches imported from Arch, +Git will find a good merge base, and it has a good chance of identifying +patches that have been traded out-of-sequence between the branches. + +OPTIONS +------- + +-h:: + Display usage. + +-v:: + Verbose output. + +-T:: + Many tags. Will create a tag for every commit, reflecting the commit + name in the Arch repository. + +-f:: + Use the fast patchset import strategy. This can be significantly + faster for large trees, but cannot handle directory renames or + permissions changes. The default strategy is slow and safe. + +-o:: + Use this for compatibility with old-style branch names used by + earlier versions of 'git archimport'. Old-style branch names + were category{litdd}branch, whereas new-style branch names are + archive,category{litdd}branch{litdd}version. In both cases, names given + on the command-line will override the automatically-generated + ones. + +-D <depth>:: + Follow merge ancestry and attempt to import trees that have been + merged from. Specify a depth greater than 1 if patch logs have been + pruned. + +-a:: + Attempt to auto-register archives at http://mirrors.sourcecontrol.net + This is particularly useful with the -D option. + +-t <tmpdir>:: + Override the default tempdir. + + +<archive/branch>:: + Archive/branch identifier in a format that `tla log` understands. + + +GIT +--- +Part of the linkgit:git[1] suite diff --git a/Documentation/git-archive.txt b/Documentation/git-archive.txt new file mode 100644 index 0000000..cfa1e4e --- /dev/null +++ b/Documentation/git-archive.txt @@ -0,0 +1,197 @@ +git-archive(1) +============== + +NAME +---- +git-archive - Create an archive of files from a named tree + + +SYNOPSIS +-------- +[verse] +'git archive' [--format=<fmt>] [--list] [--prefix=<prefix>/] [<extra>] + [-o <file> | --output=<file>] [--worktree-attributes] + [--remote=<repo> [--exec=<git-upload-archive>]] <tree-ish> + [<path>...] + +DESCRIPTION +----------- +Creates an archive of the specified format containing the tree +structure for the named tree, and writes it out to the standard +output. If <prefix> is specified it is +prepended to the filenames in the archive. + +'git archive' behaves differently when given a tree ID versus when +given a commit ID or tag ID. In the first case the current time is +used as the modification time of each file in the archive. In the latter +case the commit time as recorded in the referenced commit object is +used instead. Additionally the commit ID is stored in a global +extended pax header if the tar format is used; it can be extracted +using 'git get-tar-commit-id'. In ZIP files it is stored as a file +comment. + +OPTIONS +------- + +--format=<fmt>:: + Format of the resulting archive: 'tar' or 'zip'. If this option + is not given, and the output file is specified, the format is + inferred from the filename if possible (e.g. writing to "foo.zip" + makes the output to be in the zip format). Otherwise the output + format is `tar`. + +-l:: +--list:: + Show all available formats. + +-v:: +--verbose:: + Report progress to stderr. + +--prefix=<prefix>/:: + Prepend <prefix>/ to each filename in the archive. + +-o <file>:: +--output=<file>:: + Write the archive to <file> instead of stdout. + +--worktree-attributes:: + Look for attributes in .gitattributes files in the working tree + as well (see <<ATTRIBUTES>>). + +<extra>:: + This can be any options that the archiver backend understands. + See next section. + +--remote=<repo>:: + Instead of making a tar archive from the local repository, + retrieve a tar archive from a remote repository. Note that the + remote repository may place restrictions on which sha1 + expressions may be allowed in `<tree-ish>`. See + linkgit:git-upload-archive[1] for details. + +--exec=<git-upload-archive>:: + Used with --remote to specify the path to the + 'git-upload-archive' on the remote side. + +<tree-ish>:: + The tree or commit to produce an archive for. + +<path>:: + Without an optional path parameter, all files and subdirectories + of the current working directory are included in the archive. + If one or more paths are specified, only these are included. + +BACKEND EXTRA OPTIONS +--------------------- + +zip +~~~ +-0:: + Store the files instead of deflating them. +-9:: + Highest and slowest compression level. You can specify any + number from 1 to 9 to adjust compression speed and ratio. + + +CONFIGURATION +------------- + +tar.umask:: + This variable can be used to restrict the permission bits of + tar archive entries. The default is 0002, which turns off the + world write bit. The special value "user" indicates that the + archiving user's umask will be used instead. See umask(2) for + details. If `--remote` is used then only the configuration of + the remote repository takes effect. + +tar.<format>.command:: + This variable specifies a shell command through which the tar + output generated by `git archive` should be piped. The command + is executed using the shell with the generated tar file on its + standard input, and should produce the final output on its + standard output. Any compression-level options will be passed + to the command (e.g., "-9"). An output file with the same + extension as `<format>` will be use this format if no other + format is given. ++ +The "tar.gz" and "tgz" formats are defined automatically and default to +`gzip -cn`. You may override them with custom commands. + +tar.<format>.remote:: + If true, enable `<format>` for use by remote clients via + linkgit:git-upload-archive[1]. Defaults to false for + user-defined formats, but true for the "tar.gz" and "tgz" + formats. + +[[ATTRIBUTES]] +ATTRIBUTES +---------- + +export-ignore:: + Files and directories with the attribute export-ignore won't be + added to archive files. See linkgit:gitattributes[5] for details. + +export-subst:: + If the attribute export-subst is set for a file then Git will + expand several placeholders when adding this file to an archive. + See linkgit:gitattributes[5] for details. + +Note that attributes are by default taken from the `.gitattributes` files +in the tree that is being archived. If you want to tweak the way the +output is generated after the fact (e.g. you committed without adding an +appropriate export-ignore in its `.gitattributes`), adjust the checked out +`.gitattributes` file as necessary and use `--worktree-attributes` +option. Alternatively you can keep necessary attributes that should apply +while archiving any tree in your `$GIT_DIR/info/attributes` file. + +EXAMPLES +-------- +`git archive --format=tar --prefix=junk/ HEAD | (cd /var/tmp/ && tar xf -)`:: + + Create a tar archive that contains the contents of the + latest commit on the current branch, and extract it in the + `/var/tmp/junk` directory. + +`git archive --format=tar --prefix=git-1.4.0/ v1.4.0 | gzip >git-1.4.0.tar.gz`:: + + Create a compressed tarball for v1.4.0 release. + +`git archive --format=tar.gz --prefix=git-1.4.0/ v1.4.0 >git-1.4.0.tar.gz`:: + + Same as above, but using the builtin tar.gz handling. + +`git archive --prefix=git-1.4.0/ -o git-1.4.0.tar.gz v1.4.0`:: + + Same as above, but the format is inferred from the output file. + +`git archive --format=tar --prefix=git-1.4.0/ v1.4.0^{tree} | gzip >git-1.4.0.tar.gz`:: + + Create a compressed tarball for v1.4.0 release, but without a + global extended pax header. + +`git archive --format=zip --prefix=git-docs/ HEAD:Documentation/ > git-1.4.0-docs.zip`:: + + Put everything in the current head's Documentation/ directory + into 'git-1.4.0-docs.zip', with the prefix 'git-docs/'. + +`git archive -o latest.zip HEAD`:: + + Create a Zip archive that contains the contents of the latest + commit on the current branch. Note that the output format is + inferred by the extension of the output file. + +`git config tar.tar.xz.command "xz -c"`:: + + Configure a "tar.xz" format for making LZMA-compressed tarfiles. + You can use it specifying `--format=tar.xz`, or by creating an + output file like `-o foo.tar.xz`. + + +SEE ALSO +-------- +linkgit:gitattributes[5] + +GIT +--- +Part of the linkgit:git[1] suite diff --git a/Documentation/git-bisect-lk2009.txt b/Documentation/git-bisect-lk2009.txt new file mode 100644 index 0000000..c06efbd --- /dev/null +++ b/Documentation/git-bisect-lk2009.txt @@ -0,0 +1,1358 @@ +Fighting regressions with git bisect +==================================== +:Author: Christian Couder +:Email: chriscool@tuxfamily.org +:Date: 2009/11/08 + +Abstract +-------- + +"git bisect" enables software users and developers to easily find the +commit that introduced a regression. We show why it is important to +have good tools to fight regressions. We describe how "git bisect" +works from the outside and the algorithms it uses inside. Then we +explain how to take advantage of "git bisect" to improve current +practices. And we discuss how "git bisect" could improve in the +future. + + +Introduction to "git bisect" +---------------------------- + +Git is a Distributed Version Control system (DVCS) created by Linus +Torvalds and maintained by Junio Hamano. + +In Git like in many other Version Control Systems (VCS), the different +states of the data that is managed by the system are called +commits. And, as VCS are mostly used to manage software source code, +sometimes "interesting" changes of behavior in the software are +introduced in some commits. + +In fact people are specially interested in commits that introduce a +"bad" behavior, called a bug or a regression. They are interested in +these commits because a commit (hopefully) contains a very small set +of source code changes. And it's much easier to understand and +properly fix a problem when you only need to check a very small set of +changes, than when you don't know where look in the first place. + +So to help people find commits that introduce a "bad" behavior, the +"git bisect" set of commands was invented. And it follows of course +that in "git bisect" parlance, commits where the "interesting +behavior" is present are called "bad" commits, while other commits are +called "good" commits. And a commit that introduce the behavior we are +interested in is called a "first bad commit". Note that there could be +more than one "first bad commit" in the commit space we are searching. + +So "git bisect" is designed to help find a "first bad commit". And to +be as efficient as possible, it tries to perform a binary search. + + +Fighting regressions overview +----------------------------- + +Regressions: a big problem +~~~~~~~~~~~~~~~~~~~~~~~~~~ + +Regressions are a big problem in the software industry. But it's +difficult to put some real numbers behind that claim. + +There are some numbers about bugs in general, like a NIST study in +2002 <<1>> that said: + +_____________ +Software bugs, or errors, are so prevalent and so detrimental that +they cost the U.S. economy an estimated $59.5 billion annually, or +about 0.6 percent of the gross domestic product, according to a newly +released study commissioned by the Department of Commerce's National +Institute of Standards and Technology (NIST). At the national level, +over half of the costs are borne by software users and the remainder +by software developers/vendors. The study also found that, although +all errors cannot be removed, more than a third of these costs, or an +estimated $22.2 billion, could be eliminated by an improved testing +infrastructure that enables earlier and more effective identification +and removal of software defects. These are the savings associated with +finding an increased percentage (but not 100 percent) of errors closer +to the development stages in which they are introduced. Currently, +over half of all errors are not found until "downstream" in the +development process or during post-sale software use. +_____________ + +And then: + +_____________ +Software developers already spend approximately 80 percent of +development costs on identifying and correcting defects, and yet few +products of any type other than software are shipped with such high +levels of errors. +_____________ + +Eventually the conclusion started with: + +_____________ +The path to higher software quality is significantly improved software +testing. +_____________ + +There are other estimates saying that 80% of the cost related to +software is about maintenance <<2>>. + +Though, according to Wikipedia <<3>>: + +_____________ +A common perception of maintenance is that it is merely fixing +bugs. However, studies and surveys over the years have indicated that +the majority, over 80%, of the maintenance effort is used for +non-corrective actions (Pigosky 1997). This perception is perpetuated +by users submitting problem reports that in reality are functionality +enhancements to the system. +_____________ + +But we can guess that improving on existing software is very costly +because you have to watch out for regressions. At least this would +make the above studies consistent among themselves. + +Of course some kind of software is developed, then used during some +time without being improved on much, and then finally thrown away. In +this case, of course, regressions may not be a big problem. But on the +other hand, there is a lot of big software that is continually +developed and maintained during years or even tens of years by a lot +of people. And as there are often many people who depend (sometimes +critically) on such software, regressions are a really big problem. + +One such software is the Linux kernel. And if we look at the Linux +kernel, we can see that a lot of time and effort is spent to fight +regressions. The release cycle start with a 2 weeks long merge +window. Then the first release candidate (rc) version is tagged. And +after that about 7 or 8 more rc versions will appear with around one +week between each of them, before the final release. + +The time between the first rc release and the final release is +supposed to be used to test rc versions and fight bugs and especially +regressions. And this time is more than 80% of the release cycle +time. But this is not the end of the fight yet, as of course it +continues after the release. + +And then this is what Ingo Molnar (a well known Linux kernel +developer) says about his use of git bisect: + +_____________ +I most actively use it during the merge window (when a lot of trees +get merged upstream and when the influx of bugs is the highest) - and +yes, there have been cases that i used it multiple times a day. My +average is roughly once a day. +_____________ + +So regressions are fought all the time by developers, and indeed it is +well known that bugs should be fixed as soon as possible, so as soon +as they are found. That's why it is interesting to have good tools for +this purpose. + +Other tools to fight regressions +~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ + +So what are the tools used to fight regressions? They are nearly the +same as those used to fight regular bugs. The only specific tools are +test suites and tools similar as "git bisect". + +Test suites are very nice. But when they are used alone, they are +supposed to be used so that all the tests are checked after each +commit. This means that they are not very efficient, because many +tests are run for no interesting result, and they suffer from +combinational explosion. + +In fact the problem is that big software often has many different +configuration options and that each test case should pass for each +configuration after each commit. So if you have for each release: N +configurations, M commits and T test cases, you should perform: + +------------- +N * M * T tests +------------- + +where N, M and T are all growing with the size your software. + +So very soon it will not be possible to completely test everything. + +And if some bugs slip through your test suite, then you can add a test +to your test suite. But if you want to use your new improved test +suite to find where the bug slipped in, then you will either have to +emulate a bisection process or you will perhaps bluntly test each +commit backward starting from the "bad" commit you have which may be +very wasteful. + +"git bisect" overview +--------------------- + +Starting a bisection +~~~~~~~~~~~~~~~~~~~~ + +The first "git bisect" subcommand to use is "git bisect start" to +start the search. Then bounds must be set to limit the commit +space. This is done usually by giving one "bad" and at least one +"good" commit. They can be passed in the initial call to "git bisect +start" like this: + +------------- +$ git bisect start [BAD [GOOD...]] +------------- + +or they can be set using: + +------------- +$ git bisect bad [COMMIT] +------------- + +and: + +------------- +$ git bisect good [COMMIT...] +------------- + +where BAD, GOOD and COMMIT are all names that can be resolved to a +commit. + +Then "git bisect" will checkout a commit of its choosing and ask the +user to test it, like this: + +------------- +$ git bisect start v2.6.27 v2.6.25 +Bisecting: 10928 revisions left to test after this (roughly 14 steps) +[2ec65f8b89ea003c27ff7723525a2ee335a2b393] x86: clean up using max_low_pfn on 32-bit +------------- + +Note that the example that we will use is really a toy example, we +will be looking for the first commit that has a version like +"2.6.26-something", that is the commit that has a "SUBLEVEL = 26" line +in the top level Makefile. This is a toy example because there are +better ways to find this commit with Git than using "git bisect" (for +example "git blame" or "git log -S<string>"). + +Driving a bisection manually +~~~~~~~~~~~~~~~~~~~~~~~~~~~~ + +At this point there are basically 2 ways to drive the search. It can +be driven manually by the user or it can be driven automatically by a +script or a command. + +If the user is driving it, then at each step of the search, the user +will have to test the current commit and say if it is "good" or "bad" +using the "git bisect good" or "git bisect bad" commands respectively +that have been described above. For example: + +------------- +$ git bisect bad +Bisecting: 5480 revisions left to test after this (roughly 13 steps) +[66c0b394f08fd89236515c1c84485ea712a157be] KVM: kill file->f_count abuse in kvm +------------- + +And after a few more steps like that, "git bisect" will eventually +find a first bad commit: + +------------- +$ git bisect bad +2ddcca36c8bcfa251724fe342c8327451988be0d is the first bad commit +commit 2ddcca36c8bcfa251724fe342c8327451988be0d +Author: Linus Torvalds <torvalds@linux-foundation.org> +Date: Sat May 3 11:59:44 2008 -0700 + + Linux 2.6.26-rc1 + +:100644 100644 5cf82581... 4492984e... M Makefile +------------- + +At this point we can see what the commit does, check it out (if it's +not already checked out) or tinker with it, for example: + +------------- +$ git show HEAD +commit 2ddcca36c8bcfa251724fe342c8327451988be0d +Author: Linus Torvalds <torvalds@linux-foundation.org> +Date: Sat May 3 11:59:44 2008 -0700 + + Linux 2.6.26-rc1 + +diff --git a/Makefile b/Makefile +index 5cf8258..4492984 100644 +--- a/Makefile ++++ b/Makefile +@@ -1,7 +1,7 @@ + VERSION = 2 + PATCHLEVEL = 6 +-SUBLEVEL = 25 +-EXTRAVERSION = ++SUBLEVEL = 26 ++EXTRAVERSION = -rc1 + NAME = Funky Weasel is Jiggy wit it + + # *DOCUMENTATION* +------------- + +And when we are finished we can use "git bisect reset" to go back to +the branch we were in before we started bisecting: + +------------- +$ git bisect reset +Checking out files: 100% (21549/21549), done. +Previous HEAD position was 2ddcca3... Linux 2.6.26-rc1 +Switched to branch 'master' +------------- + +Driving a bisection automatically +~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ + +The other way to drive the bisection process is to tell "git bisect" +to launch a script or command at each bisection step to know if the +current commit is "good" or "bad". To do that, we use the "git bisect +run" command. For example: + +------------- +$ git bisect start v2.6.27 v2.6.25 +Bisecting: 10928 revisions left to test after this (roughly 14 steps) +[2ec65f8b89ea003c27ff7723525a2ee335a2b393] x86: clean up using max_low_pfn on 32-bit +$ +$ git bisect run grep '^SUBLEVEL = 25' Makefile +running grep ^SUBLEVEL = 25 Makefile +Bisecting: 5480 revisions left to test after this (roughly 13 steps) +[66c0b394f08fd89236515c1c84485ea712a157be] KVM: kill file->f_count abuse in kvm +running grep ^SUBLEVEL = 25 Makefile +SUBLEVEL = 25 +Bisecting: 2740 revisions left to test after this (roughly 12 steps) +[671294719628f1671faefd4882764886f8ad08cb] V4L/DVB(7879): Adding cx18 Support for mxl5005s +... +... +running grep ^SUBLEVEL = 25 Makefile +Bisecting: 0 revisions left to test after this (roughly 0 steps) +[2ddcca36c8bcfa251724fe342c8327451988be0d] Linux 2.6.26-rc1 +running grep ^SUBLEVEL = 25 Makefile +2ddcca36c8bcfa251724fe342c8327451988be0d is the first bad commit +commit 2ddcca36c8bcfa251724fe342c8327451988be0d +Author: Linus Torvalds <torvalds@linux-foundation.org> +Date: Sat May 3 11:59:44 2008 -0700 + + Linux 2.6.26-rc1 + +:100644 100644 5cf82581... 4492984e... M Makefile +bisect run success +------------- + +In this example, we passed "grep '^SUBLEVEL = 25' Makefile" as +parameter to "git bisect run". This means that at each step, the grep +command we passed will be launched. And if it exits with code 0 (that +means success) then git bisect will mark the current state as +"good". If it exits with code 1 (or any code between 1 and 127 +included, except the special code 125), then the current state will be +marked as "bad". + +Exit code between 128 and 255 are special to "git bisect run". They +make it stop immediately the bisection process. This is useful for +example if the command passed takes too long to complete, because you +can kill it with a signal and it will stop the bisection process. + +It can also be useful in scripts passed to "git bisect run" to "exit +255" if some very abnormal situation is detected. + +Avoiding untestable commits +~~~~~~~~~~~~~~~~~~~~~~~~~~~ + +Sometimes it happens that the current state cannot be tested, for +example if it does not compile because there was a bug preventing it +at that time. This is what the special exit code 125 is for. It tells +"git bisect run" that the current commit should be marked as +untestable and that another one should be chosen and checked out. + +If the bisection process is driven manually, you can use "git bisect +skip" to do the same thing. (In fact the special exit code 125 makes +"git bisect run" use "git bisect skip" in the background.) + +Or if you want more control, you can inspect the current state using +for example "git bisect visualize". It will launch gitk (or "git log" +if the DISPLAY environment variable is not set) to help you find a +better bisection point. + +Either way, if you have a string of untestable commits, it might +happen that the regression you are looking for has been introduced by +one of these untestable commits. In this case it's not possible to +tell for sure which commit introduced the regression. + +So if you used "git bisect skip" (or the run script exited with +special code 125) you could get a result like this: + +------------- +There are only 'skip'ped commits left to test. +The first bad commit could be any of: +15722f2fa328eaba97022898a305ffc8172db6b1 +78e86cf3e850bd755bb71831f42e200626fbd1e0 +e15b73ad3db9b48d7d1ade32f8cd23a751fe0ace +070eab2303024706f2924822bfec8b9847e4ac1b +We cannot bisect more! +------------- + +Saving a log and replaying it +~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ + +If you want to show other people your bisection process, you can get a +log using for example: + +------------- +$ git bisect log > bisect_log.txt +------------- + +And it is possible to replay it using: + +------------- +$ git bisect replay bisect_log.txt +------------- + + +"git bisect" details +-------------------- + +Bisection algorithm +~~~~~~~~~~~~~~~~~~~ + +As the Git commits form a directed acyclic graph (DAG), finding the +best bisection commit to test at each step is not so simple. Anyway +Linus found and implemented a "truly stupid" algorithm, later improved +by Junio Hamano, that works quite well. + +So the algorithm used by "git bisect" to find the best bisection +commit when there are no skipped commits is the following: + +1) keep only the commits that: + +a) are ancestor of the "bad" commit (including the "bad" commit itself), +b) are not ancestor of a "good" commit (excluding the "good" commits). + +This means that we get rid of the uninteresting commits in the DAG. + +For example if we start with a graph like this: + +------------- +G-Y-G-W-W-W-X-X-X-X + \ / + W-W-B + / +Y---G-W---W + \ / \ +Y-Y X-X-X-X + +-> time goes this way -> +------------- + +where B is the "bad" commit, "G" are "good" commits and W, X, and Y +are other commits, we will get the following graph after this first +step: + +------------- +W-W-W + \ + W-W-B + / +W---W +------------- + +So only the W and B commits will be kept. Because commits X and Y will +have been removed by rules a) and b) respectively, and because commits +G are removed by rule b) too. + +Note for Git users, that it is equivalent as keeping only the commit +given by: + +------------- +git rev-list BAD --not GOOD1 GOOD2... +------------- + +Also note that we don't require the commits that are kept to be +descendants of a "good" commit. So in the following example, commits W +and Z will be kept: + +------------- +G-W-W-W-B + / +Z-Z +------------- + +2) starting from the "good" ends of the graph, associate to each +commit the number of ancestors it has plus one + +For example with the following graph where H is the "bad" commit and A +and D are some parents of some "good" commits: + +------------- +A-B-C + \ + F-G-H + / +D---E +------------- + +this will give: + +------------- +1 2 3 +A-B-C + \6 7 8 + F-G-H +1 2/ +D---E +------------- + +3) associate to each commit: min(X, N - X) + +where X is the value associated to the commit in step 2) and N is the +total number of commits in the graph. + +In the above example we have N = 8, so this will give: + +------------- +1 2 3 +A-B-C + \2 1 0 + F-G-H +1 2/ +D---E +------------- + +4) the best bisection point is the commit with the highest associated +number + +So in the above example the best bisection point is commit C. + +5) note that some shortcuts are implemented to speed up the algorithm + +As we know N from the beginning, we know that min(X, N - X) can't be +greater than N/2. So during steps 2) and 3), if we would associate N/2 +to a commit, then we know this is the best bisection point. So in this +case we can just stop processing any other commit and return the +current commit. + +Bisection algorithm debugging +~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ + +For any commit graph, you can see the number associated with each +commit using "git rev-list --bisect-all". + +For example, for the above graph, a command like: + +------------- +$ git rev-list --bisect-all BAD --not GOOD1 GOOD2 +------------- + +would output something like: + +------------- +e15b73ad3db9b48d7d1ade32f8cd23a751fe0ace (dist=3) +15722f2fa328eaba97022898a305ffc8172db6b1 (dist=2) +78e86cf3e850bd755bb71831f42e200626fbd1e0 (dist=2) +a1939d9a142de972094af4dde9a544e577ddef0e (dist=2) +070eab2303024706f2924822bfec8b9847e4ac1b (dist=1) +a3864d4f32a3bf5ed177ddef598490a08760b70d (dist=1) +a41baa717dd74f1180abf55e9341bc7a0bb9d556 (dist=1) +9e622a6dad403b71c40979743bb9d5be17b16bd6 (dist=0) +------------- + +Bisection algorithm discussed +~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ + +First let's define "best bisection point". We will say that a commit X +is a best bisection point or a best bisection commit if knowing its +state ("good" or "bad") gives as much information as possible whether +the state of the commit happens to be "good" or "bad". + +This means that the best bisection commits are the commits where the +following function is maximum: + +------------- +f(X) = min(information_if_good(X), information_if_bad(X)) +------------- + +where information_if_good(X) is the information we get if X is good +and information_if_bad(X) is the information we get if X is bad. + +Now we will suppose that there is only one "first bad commit". This +means that all its descendants are "bad" and all the other commits are +"good". And we will suppose that all commits have an equal probability +of being good or bad, or of being the first bad commit, so knowing the +state of c commits gives always the same amount of information +wherever these c commits are on the graph and whatever c is. (So we +suppose that these commits being for example on a branch or near a +good or a bad commit does not give more or less information). + +Let's also suppose that we have a cleaned up graph like one after step +1) in the bisection algorithm above. This means that we can measure +the information we get in terms of number of commit we can remove from +the graph.. + +And let's take a commit X in the graph. + +If X is found to be "good", then we know that its ancestors are all +"good", so we want to say that: + +------------- +information_if_good(X) = number_of_ancestors(X) (TRUE) +------------- + +And this is true because at step 1) b) we remove the ancestors of the +"good" commits. + +If X is found to be "bad", then we know that its descendants are all +"bad", so we want to say that: + +------------- +information_if_bad(X) = number_of_descendants(X) (WRONG) +------------- + +But this is wrong because at step 1) a) we keep only the ancestors of +the bad commit. So we get more information when a commit is marked as +"bad", because we also know that the ancestors of the previous "bad" +commit that are not ancestors of the new "bad" commit are not the +first bad commit. We don't know if they are good or bad, but we know +that they are not the first bad commit because they are not ancestor +of the new "bad" commit. + +So when a commit is marked as "bad" we know we can remove all the +commits in the graph except those that are ancestors of the new "bad" +commit. This means that: + +------------- +information_if_bad(X) = N - number_of_ancestors(X) (TRUE) +------------- + +where N is the number of commits in the (cleaned up) graph. + +So in the end this means that to find the best bisection commits we +should maximize the function: + +------------- +f(X) = min(number_of_ancestors(X), N - number_of_ancestors(X)) +------------- + +And this is nice because at step 2) we compute number_of_ancestors(X) +and so at step 3) we compute f(X). + +Let's take the following graph as an example: + +------------- + G-H-I-J + / \ +A-B-C-D-E-F O + \ / + K-L-M-N +------------- + +If we compute the following non optimal function on it: + +------------- +g(X) = min(number_of_ancestors(X), number_of_descendants(X)) +------------- + +we get: + +------------- + 4 3 2 1 + G-H-I-J +1 2 3 4 5 6/ \0 +A-B-C-D-E-F O + \ / + K-L-M-N + 4 3 2 1 +------------- + +but with the algorithm used by git bisect we get: + +------------- + 7 7 6 5 + G-H-I-J +1 2 3 4 5 6/ \0 +A-B-C-D-E-F O + \ / + K-L-M-N + 7 7 6 5 +------------- + +So we chose G, H, K or L as the best bisection point, which is better +than F. Because if for example L is bad, then we will know not only +that L, M and N are bad but also that G, H, I and J are not the first +bad commit (since we suppose that there is only one first bad commit +and it must be an ancestor of L). + +So the current algorithm seems to be the best possible given what we +initially supposed. + +Skip algorithm +~~~~~~~~~~~~~~ + +When some commits have been skipped (using "git bisect skip"), then +the bisection algorithm is the same for step 1) to 3). But then we use +roughly the following steps: + +6) sort the commit by decreasing associated value + +7) if the first commit has not been skipped, we can return it and stop +here + +8) otherwise filter out all the skipped commits in the sorted list + +9) use a pseudo random number generator (PRNG) to generate a random +number between 0 and 1 + +10) multiply this random number with its square root to bias it toward +0 + +11) multiply the result by the number of commits in the filtered list +to get an index into this list + +12) return the commit at the computed index + +Skip algorithm discussed +~~~~~~~~~~~~~~~~~~~~~~~~ + +After step 7) (in the skip algorithm), we could check if the second +commit has been skipped and return it if it is not the case. And in +fact that was the algorithm we used from when "git bisect skip" was +developed in Git version 1.5.4 (released on February 1st 2008) until +Git version 1.6.4 (released July 29th 2009). + +But Ingo Molnar and H. Peter Anvin (another well known linux kernel +developer) both complained that sometimes the best bisection points +all happened to be in an area where all the commits are +untestable. And in this case the user was asked to test many +untestable commits, which could be very inefficient. + +Indeed untestable commits are often untestable because a breakage was +introduced at one time, and that breakage was fixed only after many +other commits were introduced. + +This breakage is of course most of the time unrelated to the breakage +we are trying to locate in the commit graph. But it prevents us to +know if the interesting "bad behavior" is present or not. + +So it is a fact that commits near an untestable commit have a high +probability of being untestable themselves. And the best bisection +commits are often found together too (due to the bisection algorithm). + +This is why it is a bad idea to just chose the next best unskipped +bisection commit when the first one has been skipped. + +We found that most commits on the graph may give quite a lot of +information when they are tested. And the commits that will not on +average give a lot of information are the one near the good and bad +commits. + +So using a PRNG with a bias to favor commits away from the good and +bad commits looked like a good choice. + +One obvious improvement to this algorithm would be to look for a +commit that has an associated value near the one of the best bisection +commit, and that is on another branch, before using the PRNG. Because +if such a commit exists, then it is not very likely to be untestable +too, so it will probably give more information than a nearly randomly +chosen one. + +Checking merge bases +~~~~~~~~~~~~~~~~~~~~ + +There is another tweak in the bisection algorithm that has not been +described in the "bisection algorithm" above. + +We supposed in the previous examples that the "good" commits were +ancestors of the "bad" commit. But this is not a requirement of "git +bisect". + +Of course the "bad" commit cannot be an ancestor of a "good" commit, +because the ancestors of the good commits are supposed to be +"good". And all the "good" commits must be related to the bad commit. +They cannot be on a branch that has no link with the branch of the +"bad" commit. But it is possible for a good commit to be related to a +bad commit and yet not be neither one of its ancestor nor one of its +descendants. + +For example, there can be a "main" branch, and a "dev" branch that was +forked of the main branch at a commit named "D" like this: + +------------- +A-B-C-D-E-F-G <--main + \ + H-I-J <--dev +------------- + +The commit "D" is called a "merge base" for branch "main" and "dev" +because it's the best common ancestor for these branches for a merge. + +Now let's suppose that commit J is bad and commit G is good and that +we apply the bisection algorithm like it has been previously +described. + +As described in step 1) b) of the bisection algorithm, we remove all +the ancestors of the good commits because they are supposed to be good +too. + +So we would be left with only: + +------------- +H-I-J +------------- + +But what happens if the first bad commit is "B" and if it has been +fixed in the "main" branch by commit "F"? + +The result of such a bisection would be that we would find that H is +the first bad commit, when in fact it's B. So that would be wrong! + +And yes it can happen in practice that people working on one branch +are not aware that people working on another branch fixed a bug! It +could also happen that F fixed more than one bug or that it is a +revert of some big development effort that was not ready to be +released. + +In fact development teams often maintain both a development branch and +a maintenance branch, and it would be quite easy for them if "git +bisect" just worked when they want to bisect a regression on the +development branch that is not on the maintenance branch. They should +be able to start bisecting using: + +------------- +$ git bisect start dev main +------------- + +To enable that additional nice feature, when a bisection is started +and when some good commits are not ancestors of the bad commit, we +first compute the merge bases between the bad and the good commits and +we chose these merge bases as the first commits that will be checked +out and tested. + +If it happens that one merge base is bad, then the bisection process +is stopped with a message like: + +------------- +The merge base BBBBBB is bad. +This means the bug has been fixed between BBBBBB and [GGGGGG,...]. +------------- + +where BBBBBB is the sha1 hash of the bad merge base and [GGGGGG,...] +is a comma separated list of the sha1 of the good commits. + +If some of the merge bases are skipped, then the bisection process +continues, but the following message is printed for each skipped merge +base: + +------------- +Warning: the merge base between BBBBBB and [GGGGGG,...] must be skipped. +So we cannot be sure the first bad commit is between MMMMMM and BBBBBB. +We continue anyway. +------------- + +where BBBBBB is the sha1 hash of the bad commit, MMMMMM is the sha1 +hash of the merge base that is skipped and [GGGGGG,...] is a comma +separated list of the sha1 of the good commits. + +So if there is no bad merge base, the bisection process continues as +usual after this step. + +Best bisecting practices +------------------------ + +Using test suites and git bisect together +~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ + +If you both have a test suite and use git bisect, then it becomes less +important to check that all tests pass after each commit. Though of +course it is probably a good idea to have some checks to avoid +breaking too many things because it could make bisecting other bugs +more difficult. + +You can focus your efforts to check at a few points (for example rc +and beta releases) that all the T test cases pass for all the N +configurations. And when some tests don't pass you can use "git +bisect" (or better "git bisect run"). So you should perform roughly: + +------------- +c * N * T + b * M * log2(M) tests +------------- + +where c is the number of rounds of test (so a small constant) and b is +the ratio of bug per commit (hopefully a small constant too). + +So of course it's much better as it's O(N * T) vs O(N * T * M) if +you would test everything after each commit. + +This means that test suites are good to prevent some bugs from being +committed and they are also quite good to tell you that you have some +bugs. But they are not so good to tell you where some bugs have been +introduced. To tell you that efficiently, git bisect is needed. + +The other nice thing with test suites, is that when you have one, you +already know how to test for bad behavior. So you can use this +knowledge to create a new test case for "git bisect" when it appears +that there is a regression. So it will be easier to bisect the bug and +fix it. And then you can add the test case you just created to your +test suite. + +So if you know how to create test cases and how to bisect, you will be +subject to a virtuous circle: + +more tests => easier to create tests => easier to bisect => more tests + +So test suites and "git bisect" are complementary tools that are very +powerful and efficient when used together. + +Bisecting build failures +~~~~~~~~~~~~~~~~~~~~~~~~ + +You can very easily automatically bisect broken builds using something +like: + +------------- +$ git bisect start BAD GOOD +$ git bisect run make +------------- + +Passing sh -c "some commands" to "git bisect run" +~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ + +For example: + +------------- +$ git bisect run sh -c "make || exit 125; ./my_app | grep 'good output'" +------------- + +On the other hand if you do this often, then it can be worth having +scripts to avoid too much typing. + +Finding performance regressions +~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ + +Here is an example script that comes slightly modified from a real +world script used by Junio Hamano <<4>>. + +This script can be passed to "git bisect run" to find the commit that +introduced a performance regression: + +------------- +#!/bin/sh + +# Build errors are not what I am interested in. +make my_app || exit 255 + +# We are checking if it stops in a reasonable amount of time, so +# let it run in the background... + +./my_app >log 2>&1 & + +# ... and grab its process ID. +pid=$! + +# ... and then wait for sufficiently long. +sleep $NORMAL_TIME + +# ... and then see if the process is still there. +if kill -0 $pid +then + # It is still running -- that is bad. + kill $pid; sleep 1; kill $pid; + exit 1 +else + # It has already finished (the $pid process was no more), + # and we are happy. + exit 0 +fi +------------- + +Following general best practices +~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ + +It is obviously a good idea not to have commits with changes that +knowingly break things, even if some other commits later fix the +breakage. + +It is also a good idea when using any VCS to have only one small +logical change in each commit. + +The smaller the changes in your commit, the most effective "git +bisect" will be. And you will probably need "git bisect" less in the +first place, as small changes are easier to review even if they are +only reviewed by the committer. + +Another good idea is to have good commit messages. They can be very +helpful to understand why some changes were made. + +These general best practices are very helpful if you bisect often. + +Avoiding bug prone merges +~~~~~~~~~~~~~~~~~~~~~~~~~ + +First merges by themselves can introduce some regressions even when +the merge needs no source code conflict resolution. This is because a +semantic change can happen in one branch while the other branch is not +aware of it. + +For example one branch can change the semantic of a function while the +other branch add more calls to the same function. + +This is made much worse if many files have to be fixed to resolve +conflicts. That's why such merges are called "evil merges". They can +make regressions very difficult to track down. It can even be +misleading to know the first bad commit if it happens to be such a +merge, because people might think that the bug comes from bad conflict +resolution when it comes from a semantic change in one branch. + +Anyway "git rebase" can be used to linearize history. This can be used +either to avoid merging in the first place. Or it can be used to +bisect on a linear history instead of the non linear one, as this +should give more information in case of a semantic change in one +branch. + +Merges can be also made simpler by using smaller branches or by using +many topic branches instead of only long version related branches. + +And testing can be done more often in special integration branches +like linux-next for the linux kernel. + +Adapting your work-flow +~~~~~~~~~~~~~~~~~~~~~~~ + +A special work-flow to process regressions can give great results. + +Here is an example of a work-flow used by Andreas Ericsson: + +* write, in the test suite, a test script that exposes the regression +* use "git bisect run" to find the commit that introduced it +* fix the bug that is often made obvious by the previous step +* commit both the fix and the test script (and if needed more tests) + +And here is what Andreas said about this work-flow <<5>>: + +_____________ +To give some hard figures, we used to have an average report-to-fix +cycle of 142.6 hours (according to our somewhat weird bug-tracker +which just measures wall-clock time). Since we moved to Git, we've +lowered that to 16.2 hours. Primarily because we can stay on top of +the bug fixing now, and because everyone's jockeying to get to fix +bugs (we're quite proud of how lazy we are to let Git find the bugs +for us). Each new release results in ~40% fewer bugs (almost certainly +due to how we now feel about writing tests). +_____________ + +Clearly this work-flow uses the virtuous circle between test suites +and "git bisect". In fact it makes it the standard procedure to deal +with regression. + +In other messages Andreas says that they also use the "best practices" +described above: small logical commits, topic branches, no evil +merge,... These practices all improve the bisectability of the commit +graph, by making it easier and more useful to bisect. + +So a good work-flow should be designed around the above points. That +is making bisecting easier, more useful and standard. + +Involving QA people and if possible end users +~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ + +One nice about "git bisect" is that it is not only a developer +tool. It can effectively be used by QA people or even end users (if +they have access to the source code or if they can get access to all +the builds). + +There was a discussion at one point on the linux kernel mailing list +of whether it was ok to always ask end user to bisect, and very good +points were made to support the point of view that it is ok. + +For example David Miller wrote <<6>>: + +_____________ +What people don't get is that this is a situation where the "end node +principle" applies. When you have limited resources (here: developers) +you don't push the bulk of the burden upon them. Instead you push +things out to the resource you have a lot of, the end nodes (here: +users), so that the situation actually scales. +_____________ + +This means that it is often "cheaper" if QA people or end users can do +it. + +What is interesting too is that end users that are reporting bugs (or +QA people that reproduced a bug) have access to the environment where +the bug happens. So they can often more easily reproduce a +regression. And if they can bisect, then more information will be +extracted from the environment where the bug happens, which means that +it will be easier to understand and then fix the bug. + +For open source projects it can be a good way to get more useful +contributions from end users, and to introduce them to QA and +development activities. + +Using complex scripts +~~~~~~~~~~~~~~~~~~~~~ + +In some cases like for kernel development it can be worth developing +complex scripts to be able to fully automate bisecting. + +Here is what Ingo Molnar says about that <<7>>: + +_____________ +i have a fully automated bootup-hang bisection script. It is based on +"git-bisect run". I run the script, it builds and boots kernels fully +automatically, and when the bootup fails (the script notices that via +the serial log, which it continuously watches - or via a timeout, if +the system does not come up within 10 minutes it's a "bad" kernel), +the script raises my attention via a beep and i power cycle the test +box. (yeah, i should make use of a managed power outlet to 100% +automate it) +_____________ + +Combining test suites, git bisect and other systems together +~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ + +We have seen that test suites an git bisect are very powerful when +used together. It can be even more powerful if you can combine them +with other systems. + +For example some test suites could be run automatically at night with +some unusual (or even random) configurations. And if a regression is +found by a test suite, then "git bisect" can be automatically +launched, and its result can be emailed to the author of the first bad +commit found by "git bisect", and perhaps other people too. And a new +entry in the bug tracking system could be automatically created too. + + +The future of bisecting +----------------------- + +"git replace" +~~~~~~~~~~~~~ + +We saw earlier that "git bisect skip" is now using a PRNG to try to +avoid areas in the commit graph where commits are untestable. The +problem is that sometimes the first bad commit will be in an +untestable area. + +To simplify the discussion we will suppose that the untestable area is +a simple string of commits and that it was created by a breakage +introduced by one commit (let's call it BBC for bisect breaking +commit) and later fixed by another one (let's call it BFC for bisect +fixing commit). + +For example: + +------------- +...-Y-BBC-X1-X2-X3-X4-X5-X6-BFC-Z-... +------------- + +where we know that Y is good and BFC is bad, and where BBC and X1 to +X6 are untestable. + +In this case if you are bisecting manually, what you can do is create +a special branch that starts just before the BBC. The first commit in +this branch should be the BBC with the BFC squashed into it. And the +other commits in the branch should be the commits between BBC and BFC +rebased on the first commit of the branch and then the commit after +BFC also rebased on. + +For example: + +------------- + (BBC+BFC)-X1'-X2'-X3'-X4'-X5'-X6'-Z' + / +...-Y-BBC-X1-X2-X3-X4-X5-X6-BFC-Z-... +------------- + +where commits quoted with ' have been rebased. + +You can easily create such a branch with Git using interactive rebase. + +For example using: + +------------- +$ git rebase -i Y Z +------------- + +and then moving BFC after BBC and squashing it. + +After that you can start bisecting as usual in the new branch and you +should eventually find the first bad commit. + +For example: + +------------- +$ git bisect start Z' Y +------------- + +If you are using "git bisect run", you can use the same manual fix up +as above, and then start another "git bisect run" in the special +branch. Or as the "git bisect" man page says, the script passed to +"git bisect run" can apply a patch before it compiles and test the +software <<8>>. The patch should turn a current untestable commits +into a testable one. So the testing will result in "good" or "bad" and +"git bisect" will be able to find the first bad commit. And the script +should not forget to remove the patch once the testing is done before +exiting from the script. + +(Note that instead of a patch you can use "git cherry-pick BFC" to +apply the fix, and in this case you should use "git reset --hard +HEAD^" to revert the cherry-pick after testing and before returning +from the script.) + +But the above ways to work around untestable areas are a little bit +clunky. Using special branches is nice because these branches can be +shared by developers like usual branches, but the risk is that people +will get many such branches. And it disrupts the normal "git bisect" +work-flow. So, if you want to use "git bisect run" completely +automatically, you have to add special code in your script to restart +bisection in the special branches. + +Anyway one can notice in the above special branch example that the Z' +and Z commits should point to the same source code state (the same +"tree" in git parlance). That's because Z' result from applying the +same changes as Z just in a slightly different order. + +So if we could just "replace" Z by Z' when we bisect, then we would +not need to add anything to a script. It would just work for anyone in +the project sharing the special branches and the replacements. + +With the example above that would give: + +------------- + (BBC+BFC)-X1'-X2'-X3'-X4'-X5'-X6'-Z'-... + / +...-Y-BBC-X1-X2-X3-X4-X5-X6-BFC-Z +------------- + +That's why the "git replace" command was created. Technically it +stores replacements "refs" in the "refs/replace/" hierarchy. These +"refs" are like branches (that are stored in "refs/heads/") or tags +(that are stored in "refs/tags"), and that means that they can +automatically be shared like branches or tags among developers. + +"git replace" is a very powerful mechanism. It can be used to fix +commits in already released history, for example to change the commit +message or the author. And it can also be used instead of git "grafts" +to link a repository with another old repository. + +In fact it's this last feature that "sold" it to the Git community, so +it is now in the "master" branch of Git's Git repository and it should +be released in Git 1.6.5 in October or November 2009. + +One problem with "git replace" is that currently it stores all the +replacements refs in "refs/replace/", but it would be perhaps better +if the replacement refs that are useful only for bisecting would be in +"refs/replace/bisect/". This way the replacement refs could be used +only for bisecting, while other refs directly in "refs/replace/" would +be used nearly all the time. + +Bisecting sporadic bugs +~~~~~~~~~~~~~~~~~~~~~~~ + +Another possible improvement to "git bisect" would be to optionally +add some redundancy to the tests performed so that it would be more +reliable when tracking sporadic bugs. + +This has been requested by some kernel developers because some bugs +called sporadic bugs do not appear in all the kernel builds because +they are very dependent on the compiler output. + +The idea is that every 3 test for example, "git bisect" could ask the +user to test a commit that has already been found to be "good" or +"bad" (because one of its descendants or one of its ancestors has been +found to be "good" or "bad" respectively). If it happens that a commit +has been previously incorrectly classified then the bisection can be +aborted early, hopefully before too many mistakes have been made. Then +the user will have to look at what happened and then restart the +bisection using a fixed bisect log. + +There is already a project called BBChop created by Ealdwulf Wuffinga +on Github that does something like that using Bayesian Search Theory +<<9>>: + +_____________ +BBChop is like 'git bisect' (or equivalent), but works when your bug +is intermittent. That is, it works in the presence of false negatives +(when a version happens to work this time even though it contains the +bug). It assumes that there are no false positives (in principle, the +same approach would work, but adding it may be non-trivial). +_____________ + +But BBChop is independent of any VCS and it would be easier for Git +users to have something integrated in Git. + +Conclusion +---------- + +We have seen that regressions are an important problem, and that "git +bisect" has nice features that complement very well practices and +other tools, especially test suites, that are generally used to fight +regressions. But it might be needed to change some work-flows and +(bad) habits to get the most out of it. + +Some improvements to the algorithms inside "git bisect" are possible +and some new features could help in some cases, but overall "git +bisect" works already very well, is used a lot, and is already very +useful. To back up that last claim, let's give the final word to Ingo +Molnar when he was asked by the author how much time does he think +"git bisect" saves him when he uses it: + +_____________ +a _lot_. + +About ten years ago did i do my first 'bisection' of a Linux patch +queue. That was prior the Git (and even prior the BitKeeper) days. I +literally days spent sorting out patches, creating what in essence +were standalone commits that i guessed to be related to that bug. + +It was a tool of absolute last resort. I'd rather spend days looking +at printk output than do a manual 'patch bisection'. + +With Git bisect it's a breeze: in the best case i can get a ~15 step +kernel bisection done in 20-30 minutes, in an automated way. Even with +manual help or when bisecting multiple, overlapping bugs, it's rarely +more than an hour. + +In fact it's invaluable because there are bugs i would never even +_try_ to debug if it wasn't for git bisect. In the past there were bug +patterns that were immediately hopeless for me to debug - at best i +could send the crash/bug signature to lkml and hope that someone else +can think of something. + +And even if a bisection fails today it tells us something valuable +about the bug: that it's non-deterministic - timing or kernel image +layout dependent. + +So git bisect is unconditional goodness - and feel free to quote that +;-) +_____________ + +Acknowledgments +--------------- + +Many thanks to Junio Hamano for his help in reviewing this paper, for +reviewing the patches I sent to the Git mailing list, for discussing +some ideas and helping me improve them, for improving "git bisect" a +lot and for his awesome work in maintaining and developing Git. + +Many thanks to Ingo Molnar for giving me very useful information that +appears in this paper, for commenting on this paper, for his +suggestions to improve "git bisect" and for evangelizing "git bisect" +on the linux kernel mailing lists. + +Many thanks to Linus Torvalds for inventing, developing and +evangelizing "git bisect", Git and Linux. + +Many thanks to the many other great people who helped one way or +another when I worked on Git, especially to Andreas Ericsson, Johannes +Schindelin, H. Peter Anvin, Daniel Barkalow, Bill Lear, John Hawley, +Shawn O. Pierce, Jeff King, Sam Vilain, Jon Seymour. + +Many thanks to the Linux-Kongress program committee for choosing the +author to given a talk and for publishing this paper. + +References +---------- + +- [[[1]]] http://www.nist.gov/public_affairs/releases/n02-10.htm['Software Errors Cost U.S. Economy $59.5 Billion Annually'. Nist News Release.] +- [[[2]]] http://java.sun.com/docs/codeconv/html/CodeConventions.doc.html#16712['Code Conventions for the Java Programming Language'. Sun Microsystems.] +- [[[3]]] http://en.wikipedia.org/wiki/Software_maintenance['Software maintenance'. Wikipedia.] +- [[[4]]] http://article.gmane.org/gmane.comp.version-control.git/45195/[Junio C Hamano. 'Automated bisect success story'. Gmane.] +- [[[5]]] http://lwn.net/Articles/317154/[Christian Couder. 'Fully automated bisecting with "git bisect run"'. LWN.net.] +- [[[6]]] http://lwn.net/Articles/277872/[Jonathan Corbet. 'Bisection divides users and developers'. LWN.net.] +- [[[7]]] http://article.gmane.org/gmane.linux.scsi/36652/[Ingo Molnar. 'Re: BUG 2.6.23-rc3 can't see sd partitions on Alpha'. Gmane.] +- [[[8]]] http://www.kernel.org/pub/software/scm/git/docs/git-bisect.html[Junio C Hamano and the git-list. 'git-bisect(1) Manual Page'. Linux Kernel Archives.] +- [[[9]]] http://github.com/Ealdwulf/bbchop[Ealdwulf. 'bbchop'. GitHub.] diff --git a/Documentation/git-bisect.txt b/Documentation/git-bisect.txt new file mode 100644 index 0000000..7e79aae --- /dev/null +++ b/Documentation/git-bisect.txt @@ -0,0 +1,500 @@ +git-bisect(1) +============= + +NAME +---- +git-bisect - Use binary search to find the commit that introduced a bug + + +SYNOPSIS +-------- +[verse] +'git bisect' <subcommand> <options> + +DESCRIPTION +----------- +The command takes various subcommands, and different options depending +on the subcommand: + + git bisect start [--term-{old,good}=<term> --term-{new,bad}=<term>] + [--no-checkout] [<bad> [<good>...]] [--] [<paths>...] + git bisect (bad|new) [<rev>] + git bisect (good|old) [<rev>...] + git bisect terms [--term-good | --term-bad] + git bisect skip [(<rev>|<range>)...] + git bisect reset [<commit>] + git bisect visualize + git bisect replay <logfile> + git bisect log + git bisect run <cmd>... + git bisect help + +This command uses a binary search algorithm to find which commit in +your project's history introduced a bug. You use it by first telling +it a "bad" commit that is known to contain the bug, and a "good" +commit that is known to be before the bug was introduced. Then `git +bisect` picks a commit between those two endpoints and asks you +whether the selected commit is "good" or "bad". It continues narrowing +down the range until it finds the exact commit that introduced the +change. + +In fact, `git bisect` can be used to find the commit that changed +*any* property of your project; e.g., the commit that fixed a bug, or +the commit that caused a benchmark's performance to improve. To +support this more general usage, the terms "old" and "new" can be used +in place of "good" and "bad", or you can choose your own terms. See +section "Alternate terms" below for more information. + +Basic bisect commands: start, bad, good +~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ + +As an example, suppose you are trying to find the commit that broke a +feature that was known to work in version `v2.6.13-rc2` of your +project. You start a bisect session as follows: + +------------------------------------------------ +$ git bisect start +$ git bisect bad # Current version is bad +$ git bisect good v2.6.13-rc2 # v2.6.13-rc2 is known to be good +------------------------------------------------ + +Once you have specified at least one bad and one good commit, `git +bisect` selects a commit in the middle of that range of history, +checks it out, and outputs something similar to the following: + +------------------------------------------------ +Bisecting: 675 revisions left to test after this (roughly 10 steps) +------------------------------------------------ + +You should now compile the checked-out version and test it. If that +version works correctly, type + +------------------------------------------------ +$ git bisect good +------------------------------------------------ + +If that version is broken, type + +------------------------------------------------ +$ git bisect bad +------------------------------------------------ + +Then `git bisect` will respond with something like + +------------------------------------------------ +Bisecting: 337 revisions left to test after this (roughly 9 steps) +------------------------------------------------ + +Keep repeating the process: compile the tree, test it, and depending +on whether it is good or bad run `git bisect good` or `git bisect bad` +to ask for the next commit that needs testing. + +Eventually there will be no more revisions left to inspect, and the +command will print out a description of the first bad commit. The +reference `refs/bisect/bad` will be left pointing at that commit. + + +Bisect reset +~~~~~~~~~~~~ + +After a bisect session, to clean up the bisection state and return to +the original HEAD, issue the following command: + +------------------------------------------------ +$ git bisect reset +------------------------------------------------ + +By default, this will return your tree to the commit that was checked +out before `git bisect start`. (A new `git bisect start` will also do +that, as it cleans up the old bisection state.) + +With an optional argument, you can return to a different commit +instead: + +------------------------------------------------ +$ git bisect reset <commit> +------------------------------------------------ + +For example, `git bisect reset bisect/bad` will check out the first +bad revision, while `git bisect reset HEAD` will leave you on the +current bisection commit and avoid switching commits at all. + + +Alternate terms +~~~~~~~~~~~~~~~ + +Sometimes you are not looking for the commit that introduced a +breakage, but rather for a commit that caused a change between some +other "old" state and "new" state. For example, you might be looking +for the commit that introduced a particular fix. Or you might be +looking for the first commit in which the source-code filenames were +finally all converted to your company's naming standard. Or whatever. + +In such cases it can be very confusing to use the terms "good" and +"bad" to refer to "the state before the change" and "the state after +the change". So instead, you can use the terms "old" and "new", +respectively, in place of "good" and "bad". (But note that you cannot +mix "good" and "bad" with "old" and "new" in a single session.) + +In this more general usage, you provide `git bisect` with a "new" +commit has some property and an "old" commit that doesn't have that +property. Each time `git bisect` checks out a commit, you test if that +commit has the property. If it does, mark the commit as "new"; +otherwise, mark it as "old". When the bisection is done, `git bisect` +will report which commit introduced the property. + +To use "old" and "new" instead of "good" and bad, you must run `git +bisect start` without commits as argument and then run the following +commands to add the commits: + +------------------------------------------------ +git bisect old [<rev>] +------------------------------------------------ + +to indicate that a commit was before the sought change, or + +------------------------------------------------ +git bisect new [<rev>...] +------------------------------------------------ + +to indicate that it was after. + +To get a reminder of the currently used terms, use + +------------------------------------------------ +git bisect terms +------------------------------------------------ + +You can get just the old (respectively new) term with `git bisect term +--term-old` or `git bisect term --term-good`. + +If you would like to use your own terms instead of "bad"/"good" or +"new"/"old", you can choose any names you like (except existing bisect +subcommands like `reset`, `start`, ...) by starting the +bisection using + +------------------------------------------------ +git bisect start --term-old <term-old> --term-new <term-new> +------------------------------------------------ + +For example, if you are looking for a commit that introduced a +performance regression, you might use + +------------------------------------------------ +git bisect start --term-old fast --term-new slow +------------------------------------------------ + +Or if you are looking for the commit that fixed a bug, you might use + +------------------------------------------------ +git bisect start --term-new fixed --term-old broken +------------------------------------------------ + +Then, use `git bisect <term-old>` and `git bisect <term-new>` instead +of `git bisect good` and `git bisect bad` to mark commits. + +Bisect visualize +~~~~~~~~~~~~~~~~ + +To see the currently remaining suspects in 'gitk', issue the following +command during the bisection process: + +------------ +$ git bisect visualize +------------ + +`view` may also be used as a synonym for `visualize`. + +If the 'DISPLAY' environment variable is not set, 'git log' is used +instead. You can also give command-line options such as `-p` and +`--stat`. + +------------ +$ git bisect view --stat +------------ + +Bisect log and bisect replay +~~~~~~~~~~~~~~~~~~~~~~~~~~~~ + +After having marked revisions as good or bad, issue the following +command to show what has been done so far: + +------------ +$ git bisect log +------------ + +If you discover that you made a mistake in specifying the status of a +revision, you can save the output of this command to a file, edit it to +remove the incorrect entries, and then issue the following commands to +return to a corrected state: + +------------ +$ git bisect reset +$ git bisect replay that-file +------------ + +Avoiding testing a commit +~~~~~~~~~~~~~~~~~~~~~~~~~ + +If, in the middle of a bisect session, you know that the suggested +revision is not a good one to test (e.g. it fails to build and you +know that the failure does not have anything to do with the bug you +are chasing), you can manually select a nearby commit and test that +one instead. + +For example: + +------------ +$ git bisect good/bad # previous round was good or bad. +Bisecting: 337 revisions left to test after this (roughly 9 steps) +$ git bisect visualize # oops, that is uninteresting. +$ git reset --hard HEAD~3 # try 3 revisions before what + # was suggested +------------ + +Then compile and test the chosen revision, and afterwards mark +the revision as good or bad in the usual manner. + +Bisect skip +~~~~~~~~~~~ + +Instead of choosing a nearby commit by yourself, you can ask Git to do +it for you by issuing the command: + +------------ +$ git bisect skip # Current version cannot be tested +------------ + +However, if you skip a commit adjacent to the one you are looking for, +Git will be unable to tell exactly which of those commits was the +first bad one. + +You can also skip a range of commits, instead of just one commit, +using range notation. For example: + +------------ +$ git bisect skip v2.5..v2.6 +------------ + +This tells the bisect process that no commit after `v2.5`, up to and +including `v2.6`, should be tested. + +Note that if you also want to skip the first commit of the range you +would issue the command: + +------------ +$ git bisect skip v2.5 v2.5..v2.6 +------------ + +This tells the bisect process that the commits between `v2.5` and +`v2.6` (inclusive) should be skipped. + + +Cutting down bisection by giving more parameters to bisect start +~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ + +You can further cut down the number of trials, if you know what part of +the tree is involved in the problem you are tracking down, by specifying +path parameters when issuing the `bisect start` command: + +------------ +$ git bisect start -- arch/i386 include/asm-i386 +------------ + +If you know beforehand more than one good commit, you can narrow the +bisect space down by specifying all of the good commits immediately after +the bad commit when issuing the `bisect start` command: + +------------ +$ git bisect start v2.6.20-rc6 v2.6.20-rc4 v2.6.20-rc1 -- + # v2.6.20-rc6 is bad + # v2.6.20-rc4 and v2.6.20-rc1 are good +------------ + +Bisect run +~~~~~~~~~~ + +If you have a script that can tell if the current source code is good +or bad, you can bisect by issuing the command: + +------------ +$ git bisect run my_script arguments +------------ + +Note that the script (`my_script` in the above example) should exit +with code 0 if the current source code is good/old, and exit with a +code between 1 and 127 (inclusive), except 125, if the current source +code is bad/new. + +Any other exit code will abort the bisect process. It should be noted +that a program that terminates via `exit(-1)` leaves $? = 255, (see the +exit(3) manual page), as the value is chopped with `& 0377`. + +The special exit code 125 should be used when the current source code +cannot be tested. If the script exits with this code, the current +revision will be skipped (see `git bisect skip` above). 125 was chosen +as the highest sensible value to use for this purpose, because 126 and 127 +are used by POSIX shells to signal specific error status (127 is for +command not found, 126 is for command found but not executable--these +details do not matter, as they are normal errors in the script, as far as +`bisect run` is concerned). + +You may often find that during a bisect session you want to have +temporary modifications (e.g. s/#define DEBUG 0/#define DEBUG 1/ in a +header file, or "revision that does not have this commit needs this +patch applied to work around another problem this bisection is not +interested in") applied to the revision being tested. + +To cope with such a situation, after the inner 'git bisect' finds the +next revision to test, the script can apply the patch +before compiling, run the real test, and afterwards decide if the +revision (possibly with the needed patch) passed the test and then +rewind the tree to the pristine state. Finally the script should exit +with the status of the real test to let the `git bisect run` command loop +determine the eventual outcome of the bisect session. + +OPTIONS +------- +--no-checkout:: ++ +Do not checkout the new working tree at each iteration of the bisection +process. Instead just update a special reference named 'BISECT_HEAD' to make +it point to the commit that should be tested. ++ +This option may be useful when the test you would perform in each step +does not require a checked out tree. ++ +If the repository is bare, `--no-checkout` is assumed. + +EXAMPLES +-------- + +* Automatically bisect a broken build between v1.2 and HEAD: ++ +------------ +$ git bisect start HEAD v1.2 -- # HEAD is bad, v1.2 is good +$ git bisect run make # "make" builds the app +$ git bisect reset # quit the bisect session +------------ + +* Automatically bisect a test failure between origin and HEAD: ++ +------------ +$ git bisect start HEAD origin -- # HEAD is bad, origin is good +$ git bisect run make test # "make test" builds and tests +$ git bisect reset # quit the bisect session +------------ + +* Automatically bisect a broken test case: ++ +------------ +$ cat ~/test.sh +#!/bin/sh +make || exit 125 # this skips broken builds +~/check_test_case.sh # does the test case pass? +$ git bisect start HEAD HEAD~10 -- # culprit is among the last 10 +$ git bisect run ~/test.sh +$ git bisect reset # quit the bisect session +------------ ++ +Here we use a `test.sh` custom script. In this script, if `make` +fails, we skip the current commit. +`check_test_case.sh` should `exit 0` if the test case passes, +and `exit 1` otherwise. ++ +It is safer if both `test.sh` and `check_test_case.sh` are +outside the repository to prevent interactions between the bisect, +make and test processes and the scripts. + +* Automatically bisect with temporary modifications (hot-fix): ++ +------------ +$ cat ~/test.sh +#!/bin/sh + +# tweak the working tree by merging the hot-fix branch +# and then attempt a build +if git merge --no-commit hot-fix && + make +then + # run project specific test and report its status + ~/check_test_case.sh + status=$? +else + # tell the caller this is untestable + status=125 +fi + +# undo the tweak to allow clean flipping to the next commit +git reset --hard + +# return control +exit $status +------------ ++ +This applies modifications from a hot-fix branch before each test run, +e.g. in case your build or test environment changed so that older +revisions may need a fix which newer ones have already. (Make sure the +hot-fix branch is based off a commit which is contained in all revisions +which you are bisecting, so that the merge does not pull in too much, or +use `git cherry-pick` instead of `git merge`.) + +* Automatically bisect a broken test case: ++ +------------ +$ git bisect start HEAD HEAD~10 -- # culprit is among the last 10 +$ git bisect run sh -c "make || exit 125; ~/check_test_case.sh" +$ git bisect reset # quit the bisect session +------------ ++ +This shows that you can do without a run script if you write the test +on a single line. + +* Locate a good region of the object graph in a damaged repository ++ +------------ +$ git bisect start HEAD <known-good-commit> [ <boundary-commit> ... ] --no-checkout +$ git bisect run sh -c ' + GOOD=$(git for-each-ref "--format=%(objectname)" refs/bisect/good-*) && + git rev-list --objects BISECT_HEAD --not $GOOD >tmp.$$ && + git pack-objects --stdout >/dev/null <tmp.$$ + rc=$? + rm -f tmp.$$ + test $rc = 0' + +$ git bisect reset # quit the bisect session +------------ ++ +In this case, when 'git bisect run' finishes, bisect/bad will refer to a commit that +has at least one parent whose reachable graph is fully traversable in the sense +required by 'git pack objects'. + +* Look for a fix instead of a regression in the code ++ +------------ +$ git bisect start +$ git bisect new HEAD # current commit is marked as new +$ git bisect old HEAD~10 # the tenth commit from now is marked as old +------------ ++ +or: +------------ +$ git bisect start --term-old broken --term-new fixed +$ git bisect fixed +$ git bisect broken HEAD~10 +------------ + +Getting help +~~~~~~~~~~~~ + +Use `git bisect` to get a short usage description, and `git bisect +help` or `git bisect -h` to get a long usage description. + +SEE ALSO +-------- +link:git-bisect-lk2009.html[Fighting regressions with git bisect], +linkgit:git-blame[1]. + +GIT +--- +Part of the linkgit:git[1] suite diff --git a/Documentation/git-blame.txt b/Documentation/git-blame.txt new file mode 100644 index 0000000..ba54175 --- /dev/null +++ b/Documentation/git-blame.txt @@ -0,0 +1,235 @@ +git-blame(1) +============ + +NAME +---- +git-blame - Show what revision and author last modified each line of a file + +SYNOPSIS +-------- +[verse] +'git blame' [-c] [-b] [-l] [--root] [-t] [-f] [-n] [-s] [-e] [-p] [-w] [--incremental] + [-L <range>] [-S <revs-file>] [-M] [-C] [-C] [-C] [--since=<date>] + [--progress] [--abbrev=<n>] [<rev> | --contents <file> | --reverse <rev>] + [--] <file> + +DESCRIPTION +----------- + +Annotates each line in the given file with information from the revision which +last modified the line. Optionally, start annotating from the given revision. + +When specified one or more times, `-L` restricts annotation to the requested +lines. + +The origin of lines is automatically followed across whole-file +renames (currently there is no option to turn the rename-following +off). To follow lines moved from one file to another, or to follow +lines that were copied and pasted from another file, etc., see the +`-C` and `-M` options. + +The report does not tell you anything about lines which have been deleted or +replaced; you need to use a tool such as 'git diff' or the "pickaxe" +interface briefly mentioned in the following paragraph. + +Apart from supporting file annotation, Git also supports searching the +development history for when a code snippet occurred in a change. This makes it +possible to track when a code snippet was added to a file, moved or copied +between files, and eventually deleted or replaced. It works by searching for +a text string in the diff. A small example of the pickaxe interface +that searches for `blame_usage`: + +----------------------------------------------------------------------------- +$ git log --pretty=oneline -S'blame_usage' +5040f17eba15504bad66b14a645bddd9b015ebb7 blame -S <ancestry-file> +ea4c7f9bf69e781dd0cd88d2bccb2bf5cc15c9a7 git-blame: Make the output +----------------------------------------------------------------------------- + +OPTIONS +------- +include::blame-options.txt[] + +-c:: + Use the same output mode as linkgit:git-annotate[1] (Default: off). + +--score-debug:: + Include debugging information related to the movement of + lines between files (see `-C`) and lines moved within a + file (see `-M`). The first number listed is the score. + This is the number of alphanumeric characters detected + as having been moved between or within files. This must be above + a certain threshold for 'git blame' to consider those lines + of code to have been moved. + +-f:: +--show-name:: + Show the filename in the original commit. By default + the filename is shown if there is any line that came from a + file with a different name, due to rename detection. + +-n:: +--show-number:: + Show the line number in the original commit (Default: off). + +-s:: + Suppress the author name and timestamp from the output. + +-e:: +--show-email:: + Show the author email instead of author name (Default: off). + This can also be controlled via the `blame.showEmail` config + option. + +-w:: + Ignore whitespace when comparing the parent's version and + the child's to find where the lines came from. + +--abbrev=<n>:: + Instead of using the default 7+1 hexadecimal digits as the + abbreviated object name, use <n>+1 digits. Note that 1 column + is used for a caret to mark the boundary commit. + + +THE PORCELAIN FORMAT +-------------------- + +In this format, each line is output after a header; the +header at the minimum has the first line which has: + +- 40-byte SHA-1 of the commit the line is attributed to; +- the line number of the line in the original file; +- the line number of the line in the final file; +- on a line that starts a group of lines from a different + commit than the previous one, the number of lines in this + group. On subsequent lines this field is absent. + +This header line is followed by the following information +at least once for each commit: + +- the author name ("author"), email ("author-mail"), time + ("author-time"), and time zone ("author-tz"); similarly + for committer. +- the filename in the commit that the line is attributed to. +- the first line of the commit log message ("summary"). + +The contents of the actual line is output after the above +header, prefixed by a TAB. This is to allow adding more +header elements later. + +The porcelain format generally suppresses commit information that has +already been seen. For example, two lines that are blamed to the same +commit will both be shown, but the details for that commit will be shown +only once. This is more efficient, but may require more state be kept by +the reader. The `--line-porcelain` option can be used to output full +commit information for each line, allowing simpler (but less efficient) +usage like: + + # count the number of lines attributed to each author + git blame --line-porcelain file | + sed -n 's/^author //p' | + sort | uniq -c | sort -rn + + +SPECIFYING RANGES +----------------- + +Unlike 'git blame' and 'git annotate' in older versions of git, the extent +of the annotation can be limited to both line ranges and revision +ranges. The `-L` option, which limits annotation to a range of lines, may be +specified multiple times. + +When you are interested in finding the origin for +lines 40-60 for file `foo`, you can use the `-L` option like so +(they mean the same thing -- both ask for 21 lines starting at +line 40): + + git blame -L 40,60 foo + git blame -L 40,+21 foo + +Also you can use a regular expression to specify the line range: + + git blame -L '/^sub hello {/,/^}$/' foo + +which limits the annotation to the body of the `hello` subroutine. + +When you are not interested in changes older than version +v2.6.18, or changes older than 3 weeks, you can use revision +range specifiers similar to 'git rev-list': + + git blame v2.6.18.. -- foo + git blame --since=3.weeks -- foo + +When revision range specifiers are used to limit the annotation, +lines that have not changed since the range boundary (either the +commit v2.6.18 or the most recent commit that is more than 3 +weeks old in the above example) are blamed for that range +boundary commit. + +A particularly useful way is to see if an added file has lines +created by copy-and-paste from existing files. Sometimes this +indicates that the developer was being sloppy and did not +refactor the code properly. You can first find the commit that +introduced the file with: + + git log --diff-filter=A --pretty=short -- foo + +and then annotate the change between the commit and its +parents, using `commit^!` notation: + + git blame -C -C -f $commit^! -- foo + + +INCREMENTAL OUTPUT +------------------ + +When called with `--incremental` option, the command outputs the +result as it is built. The output generally will talk about +lines touched by more recent commits first (i.e. the lines will +be annotated out of order) and is meant to be used by +interactive viewers. + +The output format is similar to the Porcelain format, but it +does not contain the actual lines from the file that is being +annotated. + +. Each blame entry always starts with a line of: + + <40-byte hex sha1> <sourceline> <resultline> <num_lines> ++ +Line numbers count from 1. + +. The first time that a commit shows up in the stream, it has various + other information about it printed out with a one-word tag at the + beginning of each line describing the extra commit information (author, + email, committer, dates, summary, etc.). + +. Unlike the Porcelain format, the filename information is always + given and terminates the entry: + + "filename" <whitespace-quoted-filename-goes-here> ++ +and thus it is really quite easy to parse for some line- and word-oriented +parser (which should be quite natural for most scripting languages). ++ +[NOTE] +For people who do parsing: to make it more robust, just ignore any +lines between the first and last one ("<sha1>" and "filename" lines) +where you do not recognize the tag words (or care about that particular +one) at the beginning of the "extended information" lines. That way, if +there is ever added information (like the commit encoding or extended +commit commentary), a blame viewer will not care. + + +MAPPING AUTHORS +--------------- + +include::mailmap.txt[] + + +SEE ALSO +-------- +linkgit:git-annotate[1] + +GIT +--- +Part of the linkgit:git[1] suite diff --git a/Documentation/git-branch.txt b/Documentation/git-branch.txt new file mode 100644 index 0000000..4a7037f --- /dev/null +++ b/Documentation/git-branch.txt @@ -0,0 +1,310 @@ +git-branch(1) +============= + +NAME +---- +git-branch - List, create, or delete branches + +SYNOPSIS +-------- +[verse] +'git branch' [--color[=<when>] | --no-color] [-r | -a] + [--list] [-v [--abbrev=<length> | --no-abbrev]] + [--column[=<options>] | --no-column] + [(--merged | --no-merged | --contains) [<commit>]] [--sort=<key>] + [--points-at <object>] [<pattern>...] +'git branch' [--set-upstream | --track | --no-track] [-l] [-f] <branchname> [<start-point>] +'git branch' (--set-upstream-to=<upstream> | -u <upstream>) [<branchname>] +'git branch' --unset-upstream [<branchname>] +'git branch' (-m | -M) [<oldbranch>] <newbranch> +'git branch' (-d | -D) [-r] <branchname>... +'git branch' --edit-description [<branchname>] + +DESCRIPTION +----------- + +If `--list` is given, or if there are no non-option arguments, existing +branches are listed; the current branch will be highlighted with an +asterisk. Option `-r` causes the remote-tracking branches to be listed, +and option `-a` shows both local and remote branches. If a `<pattern>` +is given, it is used as a shell wildcard to restrict the output to +matching branches. If multiple patterns are given, a branch is shown if +it matches any of the patterns. Note that when providing a +`<pattern>`, you must use `--list`; otherwise the command is interpreted +as branch creation. + +With `--contains`, shows only the branches that contain the named commit +(in other words, the branches whose tip commits are descendants of the +named commit). With `--merged`, only branches merged into the named +commit (i.e. the branches whose tip commits are reachable from the named +commit) will be listed. With `--no-merged` only branches not merged into +the named commit will be listed. If the <commit> argument is missing it +defaults to 'HEAD' (i.e. the tip of the current branch). + +The command's second form creates a new branch head named <branchname> +which points to the current 'HEAD', or <start-point> if given. + +Note that this will create the new branch, but it will not switch the +working tree to it; use "git checkout <newbranch>" to switch to the +new branch. + +When a local branch is started off a remote-tracking branch, Git sets up the +branch (specifically the `branch.<name>.remote` and `branch.<name>.merge` +configuration entries) so that 'git pull' will appropriately merge from +the remote-tracking branch. This behavior may be changed via the global +`branch.autoSetupMerge` configuration flag. That setting can be +overridden by using the `--track` and `--no-track` options, and +changed later using `git branch --set-upstream-to`. + +With a `-m` or `-M` option, <oldbranch> will be renamed to <newbranch>. +If <oldbranch> had a corresponding reflog, it is renamed to match +<newbranch>, and a reflog entry is created to remember the branch +renaming. If <newbranch> exists, -M must be used to force the rename +to happen. + +With a `-d` or `-D` option, `<branchname>` will be deleted. You may +specify more than one branch for deletion. If the branch currently +has a reflog then the reflog will also be deleted. + +Use `-r` together with `-d` to delete remote-tracking branches. Note, that it +only makes sense to delete remote-tracking branches if they no longer exist +in the remote repository or if 'git fetch' was configured not to fetch +them again. See also the 'prune' subcommand of linkgit:git-remote[1] for a +way to clean up all obsolete remote-tracking branches. + + +OPTIONS +------- +-d:: +--delete:: + Delete a branch. The branch must be fully merged in its + upstream branch, or in `HEAD` if no upstream was set with + `--track` or `--set-upstream`. + +-D:: + Shortcut for `--delete --force`. + +-l:: +--create-reflog:: + Create the branch's reflog. This activates recording of + all changes made to the branch ref, enabling use of date + based sha1 expressions such as "<branchname>@\{yesterday}". + Note that in non-bare repositories, reflogs are usually + enabled by default by the `core.logallrefupdates` config option. + +-f:: +--force:: + Reset <branchname> to <startpoint> if <branchname> exists + already. Without `-f` 'git branch' refuses to change an existing branch. + In combination with `-d` (or `--delete`), allow deleting the + branch irrespective of its merged status. In combination with + `-m` (or `--move`), allow renaming the branch even if the new + branch name already exists. + +-m:: +--move:: + Move/rename a branch and the corresponding reflog. + +-M:: + Shortcut for `--move --force`. + +--color[=<when>]:: + Color branches to highlight current, local, and + remote-tracking branches. + The value must be always (the default), never, or auto. + +--no-color:: + Turn off branch colors, even when the configuration file gives the + default to color output. + Same as `--color=never`. + +--column[=<options>]:: +--no-column:: + Display branch listing in columns. See configuration variable + column.branch for option syntax.`--column` and `--no-column` + without options are equivalent to 'always' and 'never' respectively. ++ +This option is only applicable in non-verbose mode. + +-r:: +--remotes:: + List or delete (if used with -d) the remote-tracking branches. + +-a:: +--all:: + List both remote-tracking branches and local branches. + +--list:: + Activate the list mode. `git branch <pattern>` would try to create a branch, + use `git branch --list <pattern>` to list matching branches. + +-v:: +-vv:: +--verbose:: + When in list mode, + show sha1 and commit subject line for each head, along with + relationship to upstream branch (if any). If given twice, print + the name of the upstream branch, as well (see also `git remote + show <remote>`). + +-q:: +--quiet:: + Be more quiet when creating or deleting a branch, suppressing + non-error messages. + +--abbrev=<length>:: + Alter the sha1's minimum display length in the output listing. + The default value is 7 and can be overridden by the `core.abbrev` + config option. + +--no-abbrev:: + Display the full sha1s in the output listing rather than abbreviating them. + +-t:: +--track:: + When creating a new branch, set up `branch.<name>.remote` and + `branch.<name>.merge` configuration entries to mark the + start-point branch as "upstream" from the new branch. This + configuration will tell git to show the relationship between the + two branches in `git status` and `git branch -v`. Furthermore, + it directs `git pull` without arguments to pull from the + upstream when the new branch is checked out. ++ +This behavior is the default when the start point is a remote-tracking branch. +Set the branch.autoSetupMerge configuration variable to `false` if you +want `git checkout` and `git branch` to always behave as if '--no-track' +were given. Set it to `always` if you want this behavior when the +start-point is either a local or remote-tracking branch. + +--no-track:: + Do not set up "upstream" configuration, even if the + branch.autoSetupMerge configuration variable is true. + +--set-upstream:: + If specified branch does not exist yet or if `--force` has been + given, acts exactly like `--track`. Otherwise sets up configuration + like `--track` would when creating the branch, except that where + branch points to is not changed. + +-u <upstream>:: +--set-upstream-to=<upstream>:: + Set up <branchname>'s tracking information so <upstream> is + considered <branchname>'s upstream branch. If no <branchname> + is specified, then it defaults to the current branch. + +--unset-upstream:: + Remove the upstream information for <branchname>. If no branch + is specified it defaults to the current branch. + +--edit-description:: + Open an editor and edit the text to explain what the branch is + for, to be used by various other commands (e.g. `format-patch`, + `request-pull`, and `merge` (if enabled)). Multi-line explanations + may be used. + +--contains [<commit>]:: + Only list branches which contain the specified commit (HEAD + if not specified). Implies `--list`. + +--merged [<commit>]:: + Only list branches whose tips are reachable from the + specified commit (HEAD if not specified). Implies `--list`. + +--no-merged [<commit>]:: + Only list branches whose tips are not reachable from the + specified commit (HEAD if not specified). Implies `--list`. + +<branchname>:: + The name of the branch to create or delete. + The new branch name must pass all checks defined by + linkgit:git-check-ref-format[1]. Some of these checks + may restrict the characters allowed in a branch name. + +<start-point>:: + The new branch head will point to this commit. It may be + given as a branch name, a commit-id, or a tag. If this + option is omitted, the current HEAD will be used instead. + +<oldbranch>:: + The name of an existing branch to rename. + +<newbranch>:: + The new name for an existing branch. The same restrictions as for + <branchname> apply. + +--sort=<key>:: + Sort based on the key given. Prefix `-` to sort in descending + order of the value. You may use the --sort=<key> option + multiple times, in which case the last key becomes the primary + key. The keys supported are the same as those in `git + for-each-ref`. Sort order defaults to sorting based on the + full refname (including `refs/...` prefix). This lists + detached HEAD (if present) first, then local branches and + finally remote-tracking branches. + + +--points-at <object>:: + Only list branches of the given object. + +Examples +-------- + +Start development from a known tag:: ++ +------------ +$ git clone git://git.kernel.org/pub/scm/.../linux-2.6 my2.6 +$ cd my2.6 +$ git branch my2.6.14 v2.6.14 <1> +$ git checkout my2.6.14 +------------ ++ +<1> This step and the next one could be combined into a single step with +"checkout -b my2.6.14 v2.6.14". + +Delete an unneeded branch:: ++ +------------ +$ git clone git://git.kernel.org/.../git.git my.git +$ cd my.git +$ git branch -d -r origin/todo origin/html origin/man <1> +$ git branch -D test <2> +------------ ++ +<1> Delete the remote-tracking branches "todo", "html" and "man". The next +'fetch' or 'pull' will create them again unless you configure them not to. +See linkgit:git-fetch[1]. +<2> Delete the "test" branch even if the "master" branch (or whichever branch +is currently checked out) does not have all commits from the test branch. + + +Notes +----- + +If you are creating a branch that you want to checkout immediately, it is +easier to use the git checkout command with its `-b` option to create +a branch and check it out with a single command. + +The options `--contains`, `--merged` and `--no-merged` serve three related +but different purposes: + +- `--contains <commit>` is used to find all branches which will need + special attention if <commit> were to be rebased or amended, since those + branches contain the specified <commit>. + +- `--merged` is used to find all branches which can be safely deleted, + since those branches are fully contained by HEAD. + +- `--no-merged` is used to find branches which are candidates for merging + into HEAD, since those branches are not fully contained by HEAD. + +SEE ALSO +-------- +linkgit:git-check-ref-format[1], +linkgit:git-fetch[1], +linkgit:git-remote[1], +link:user-manual.html#what-is-a-branch[``Understanding history: What is +a branch?''] in the Git User's Manual. + +GIT +--- +Part of the linkgit:git[1] suite diff --git a/Documentation/git-bundle.txt b/Documentation/git-bundle.txt new file mode 100644 index 0000000..3a8120c --- /dev/null +++ b/Documentation/git-bundle.txt @@ -0,0 +1,205 @@ +git-bundle(1) +============= + +NAME +---- +git-bundle - Move objects and refs by archive + + +SYNOPSIS +-------- +[verse] +'git bundle' create <file> <git-rev-list-args> +'git bundle' verify <file> +'git bundle' list-heads <file> [<refname>...] +'git bundle' unbundle <file> [<refname>...] + +DESCRIPTION +----------- + +Some workflows require that one or more branches of development on one +machine be replicated on another machine, but the two machines cannot +be directly connected, and therefore the interactive Git protocols (git, +ssh, http) cannot be used. This command provides support for +'git fetch' and 'git pull' to operate by packaging objects and references +in an archive at the originating machine, then importing those into +another repository using 'git fetch' and 'git pull' +after moving the archive by some means (e.g., by sneakernet). As no +direct connection between the repositories exists, the user must specify a +basis for the bundle that is held by the destination repository: the +bundle assumes that all objects in the basis are already in the +destination repository. + +OPTIONS +------- + +create <file>:: + Used to create a bundle named 'file'. This requires the + 'git-rev-list-args' arguments to define the bundle contents. + +verify <file>:: + Used to check that a bundle file is valid and will apply + cleanly to the current repository. This includes checks on the + bundle format itself as well as checking that the prerequisite + commits exist and are fully linked in the current repository. + 'git bundle' prints a list of missing commits, if any, and exits + with a non-zero status. + +list-heads <file>:: + Lists the references defined in the bundle. If followed by a + list of references, only references matching those given are + printed out. + +unbundle <file>:: + Passes the objects in the bundle to 'git index-pack' + for storage in the repository, then prints the names of all + defined references. If a list of references is given, only + references matching those in the list are printed. This command is + really plumbing, intended to be called only by 'git fetch'. + +<git-rev-list-args>:: + A list of arguments, acceptable to 'git rev-parse' and + 'git rev-list' (and containing a named ref, see SPECIFYING REFERENCES + below), that specifies the specific objects and references + to transport. For example, `master~10..master` causes the + current master reference to be packaged along with all objects + added since its 10th ancestor commit. There is no explicit + limit to the number of references and objects that may be + packaged. + + +[<refname>...]:: + A list of references used to limit the references reported as + available. This is principally of use to 'git fetch', which + expects to receive only those references asked for and not + necessarily everything in the pack (in this case, 'git bundle' acts + like 'git fetch-pack'). + +SPECIFYING REFERENCES +--------------------- + +'git bundle' will only package references that are shown by +'git show-ref': this includes heads, tags, and remote heads. References +such as `master~1` cannot be packaged, but are perfectly suitable for +defining the basis. More than one reference may be packaged, and more +than one basis can be specified. The objects packaged are those not +contained in the union of the given bases. Each basis can be +specified explicitly (e.g. `^master~10`), or implicitly (e.g. +`master~10..master`, `--since=10.days.ago master`). + +It is very important that the basis used be held by the destination. +It is okay to err on the side of caution, causing the bundle file +to contain objects already in the destination, as these are ignored +when unpacking at the destination. + +EXAMPLE +------- + +Assume you want to transfer the history from a repository R1 on machine A +to another repository R2 on machine B. +For whatever reason, direct connection between A and B is not allowed, +but we can move data from A to B via some mechanism (CD, email, etc.). +We want to update R2 with development made on the branch master in R1. + +To bootstrap the process, you can first create a bundle that does not have +any basis. You can use a tag to remember up to what commit you last +processed, in order to make it easy to later update the other repository +with an incremental bundle: + +---------------- +machineA$ cd R1 +machineA$ git bundle create file.bundle master +machineA$ git tag -f lastR2bundle master +---------------- + +Then you transfer file.bundle to the target machine B. Because this +bundle does not require any existing object to be extracted, you can +create a new repository on machine B by cloning from it: + +---------------- +machineB$ git clone -b master /home/me/tmp/file.bundle R2 +---------------- + +This will define a remote called "origin" in the resulting repository that +lets you fetch and pull from the bundle. The $GIT_DIR/config file in R2 will +have an entry like this: + +------------------------ +[remote "origin"] + url = /home/me/tmp/file.bundle + fetch = refs/heads/*:refs/remotes/origin/* +------------------------ + +To update the resulting mine.git repository, you can fetch or pull after +replacing the bundle stored at /home/me/tmp/file.bundle with incremental +updates. + +After working some more in the original repository, you can create an +incremental bundle to update the other repository: + +---------------- +machineA$ cd R1 +machineA$ git bundle create file.bundle lastR2bundle..master +machineA$ git tag -f lastR2bundle master +---------------- + +You then transfer the bundle to the other machine to replace +/home/me/tmp/file.bundle, and pull from it. + +---------------- +machineB$ cd R2 +machineB$ git pull +---------------- + +If you know up to what commit the intended recipient repository should +have the necessary objects, you can use that knowledge to specify the +basis, giving a cut-off point to limit the revisions and objects that go +in the resulting bundle. The previous example used the lastR2bundle tag +for this purpose, but you can use any other options that you would give to +the linkgit:git-log[1] command. Here are more examples: + +You can use a tag that is present in both: + +---------------- +$ git bundle create mybundle v1.0.0..master +---------------- + +You can use a basis based on time: + +---------------- +$ git bundle create mybundle --since=10.days master +---------------- + +You can use the number of commits: + +---------------- +$ git bundle create mybundle -10 master +---------------- + +You can run `git-bundle verify` to see if you can extract from a bundle +that was created with a basis: + +---------------- +$ git bundle verify mybundle +---------------- + +This will list what commits you must have in order to extract from the +bundle and will error out if you do not have them. + +A bundle from a recipient repository's point of view is just like a +regular repository which it fetches or pulls from. You can, for example, map +references when fetching: + +---------------- +$ git fetch mybundle master:localRef +---------------- + +You can also see what references it offers: + +---------------- +$ git ls-remote mybundle +---------------- + +GIT +--- +Part of the linkgit:git[1] suite diff --git a/Documentation/git-cat-file.txt b/Documentation/git-cat-file.txt new file mode 100644 index 0000000..eb3d694 --- /dev/null +++ b/Documentation/git-cat-file.txt @@ -0,0 +1,282 @@ +git-cat-file(1) +=============== + +NAME +---- +git-cat-file - Provide content or type and size information for repository objects + + +SYNOPSIS +-------- +[verse] +'git cat-file' (-t [--allow-unknown-type]| -s [--allow-unknown-type]| -e | -p | <type> | --textconv ) <object> +'git cat-file' (--batch | --batch-check) [--follow-symlinks] + +DESCRIPTION +----------- +In its first form, the command provides the content or the type of an object in +the repository. The type is required unless '-t' or '-p' is used to find the +object type, or '-s' is used to find the object size, or '--textconv' is used +(which implies type "blob"). + +In the second form, a list of objects (separated by linefeeds) is provided on +stdin, and the SHA-1, type, and size of each object is printed on stdout. + +OPTIONS +------- +<object>:: + The name of the object to show. + For a more complete list of ways to spell object names, see + the "SPECIFYING REVISIONS" section in linkgit:gitrevisions[7]. + +-t:: + Instead of the content, show the object type identified by + <object>. + +-s:: + Instead of the content, show the object size identified by + <object>. + +-e:: + Suppress all output; instead exit with zero status if <object> + exists and is a valid object. + +-p:: + Pretty-print the contents of <object> based on its type. + +<type>:: + Typically this matches the real type of <object> but asking + for a type that can trivially be dereferenced from the given + <object> is also permitted. An example is to ask for a + "tree" with <object> being a commit object that contains it, + or to ask for a "blob" with <object> being a tag object that + points at it. + +--textconv:: + Show the content as transformed by a textconv filter. In this case, + <object> has be of the form <tree-ish>:<path>, or :<path> in order + to apply the filter to the content recorded in the index at <path>. + +--batch:: +--batch=<format>:: + Print object information and contents for each object provided + on stdin. May not be combined with any other options or arguments. + See the section `BATCH OUTPUT` below for details. + +--batch-check:: +--batch-check=<format>:: + Print object information for each object provided on stdin. May + not be combined with any other options or arguments. See the + section `BATCH OUTPUT` below for details. + +--batch-all-objects:: + Instead of reading a list of objects on stdin, perform the + requested batch operation on all objects in the repository and + any alternate object stores (not just reachable objects). + Requires `--batch` or `--batch-check` be specified. Note that + the objects are visited in order sorted by their hashes. + +--buffer:: + Normally batch output is flushed after each object is output, so + that a process can interactively read and write from + `cat-file`. With this option, the output uses normal stdio + buffering; this is much more efficient when invoking + `--batch-check` on a large number of objects. + +--allow-unknown-type:: + Allow -s or -t to query broken/corrupt objects of unknown type. + +--follow-symlinks:: + With --batch or --batch-check, follow symlinks inside the + repository when requesting objects with extended SHA-1 + expressions of the form tree-ish:path-in-tree. Instead of + providing output about the link itself, provide output about + the linked-to object. If a symlink points outside the + tree-ish (e.g. a link to /foo or a root-level link to ../foo), + the portion of the link which is outside the tree will be + printed. ++ +This option does not (currently) work correctly when an object in the +index is specified (e.g. `:link` instead of `HEAD:link`) rather than +one in the tree. ++ +This option cannot (currently) be used unless `--batch` or +`--batch-check` is used. ++ +For example, consider a git repository containing: ++ +-- + f: a file containing "hello\n" + link: a symlink to f + dir/link: a symlink to ../f + plink: a symlink to ../f + alink: a symlink to /etc/passwd +-- ++ +For a regular file `f`, `echo HEAD:f | git cat-file --batch` would print ++ +-- + ce013625030ba8dba906f756967f9e9ca394464a blob 6 +-- ++ +And `echo HEAD:link | git cat-file --batch --follow-symlinks` would +print the same thing, as would `HEAD:dir/link`, as they both point at +`HEAD:f`. ++ +Without `--follow-symlinks`, these would print data about the symlink +itself. In the case of `HEAD:link`, you would see ++ +-- + 4d1ae35ba2c8ec712fa2a379db44ad639ca277bd blob 1 +-- ++ +Both `plink` and `alink` point outside the tree, so they would +respectively print: ++ +-- + symlink 4 + ../f + + symlink 11 + /etc/passwd +-- + + +OUTPUT +------ +If '-t' is specified, one of the <type>. + +If '-s' is specified, the size of the <object> in bytes. + +If '-e' is specified, no output. + +If '-p' is specified, the contents of <object> are pretty-printed. + +If <type> is specified, the raw (though uncompressed) contents of the <object> +will be returned. + +BATCH OUTPUT +------------ + +If `--batch` or `--batch-check` is given, `cat-file` will read objects +from stdin, one per line, and print information about them. By default, +the whole line is considered as an object, as if it were fed to +linkgit:git-rev-parse[1]. + +You can specify the information shown for each object by using a custom +`<format>`. The `<format>` is copied literally to stdout for each +object, with placeholders of the form `%(atom)` expanded, followed by a +newline. The available atoms are: + +`objectname`:: + The 40-hex object name of the object. + +`objecttype`:: + The type of of the object (the same as `cat-file -t` reports). + +`objectsize`:: + The size, in bytes, of the object (the same as `cat-file -s` + reports). + +`objectsize:disk`:: + The size, in bytes, that the object takes up on disk. See the + note about on-disk sizes in the `CAVEATS` section below. + +`deltabase`:: + If the object is stored as a delta on-disk, this expands to the + 40-hex sha1 of the delta base object. Otherwise, expands to the + null sha1 (40 zeroes). See `CAVEATS` below. + +`rest`:: + If this atom is used in the output string, input lines are split + at the first whitespace boundary. All characters before that + whitespace are considered to be the object name; characters + after that first run of whitespace (i.e., the "rest" of the + line) are output in place of the `%(rest)` atom. + +If no format is specified, the default format is `%(objectname) +%(objecttype) %(objectsize)`. + +If `--batch` is specified, the object information is followed by the +object contents (consisting of `%(objectsize)` bytes), followed by a +newline. + +For example, `--batch` without a custom format would produce: + +------------ +<sha1> SP <type> SP <size> LF +<contents> LF +------------ + +Whereas `--batch-check='%(objectname) %(objecttype)'` would produce: + +------------ +<sha1> SP <type> LF +------------ + +If a name is specified on stdin that cannot be resolved to an object in +the repository, then `cat-file` will ignore any custom format and print: + +------------ +<object> SP missing LF +------------ + +If --follow-symlinks is used, and a symlink in the repository points +outside the repository, then `cat-file` will ignore any custom format +and print: + +------------ +symlink SP <size> LF +<symlink> LF +------------ + +The symlink will either be absolute (beginning with a /), or relative +to the tree root. For instance, if dir/link points to ../../foo, then +<symlink> will be ../foo. <size> is the size of the symlink in bytes. + +If --follow-symlinks is used, the following error messages will be +displayed: + +------------ +<object> SP missing LF +------------ +is printed when the initial symlink requested does not exist. + +------------ +dangling SP <size> LF +<object> LF +------------ +is printed when the initial symlink exists, but something that +it (transitive-of) points to does not. + +------------ +loop SP <size> LF +<object> LF +------------ +is printed for symlink loops (or any symlinks that +require more than 40 link resolutions to resolve). + +------------ +notdir SP <size> LF +<object> LF +------------ +is printed when, during symlink resolution, a file is used as a +directory name. + +CAVEATS +------- + +Note that the sizes of objects on disk are reported accurately, but care +should be taken in drawing conclusions about which refs or objects are +responsible for disk usage. The size of a packed non-delta object may be +much larger than the size of objects which delta against it, but the +choice of which object is the base and which is the delta is arbitrary +and is subject to change during a repack. + +Note also that multiple copies of an object may be present in the object +database; in this case, it is undefined which copy's size or delta base +will be reported. + +GIT +--- +Part of the linkgit:git[1] suite diff --git a/Documentation/git-check-attr.txt b/Documentation/git-check-attr.txt new file mode 100644 index 0000000..aa3b2bf --- /dev/null +++ b/Documentation/git-check-attr.txt @@ -0,0 +1,120 @@ +git-check-attr(1) +================= + +NAME +---- +git-check-attr - Display gitattributes information + + +SYNOPSIS +-------- +[verse] +'git check-attr' [-a | --all | attr...] [--] pathname... +'git check-attr' --stdin [-z] [-a | --all | attr...] + +DESCRIPTION +----------- +For every pathname, this command will list if each attribute is 'unspecified', +'set', or 'unset' as a gitattribute on that pathname. + +OPTIONS +------- +-a, --all:: + List all attributes that are associated with the specified + paths. If this option is used, then 'unspecified' attributes + will not be included in the output. + +--cached:: + Consider `.gitattributes` in the index only, ignoring the working tree. + +--stdin:: + Read pathnames from the standard input, one per line, + instead of from the command-line. + +-z:: + The output format is modified to be machine-parseable. + If `--stdin` is also given, input paths are separated + with a NUL character instead of a linefeed character. + +\--:: + Interpret all preceding arguments as attributes and all following + arguments as path names. + +If none of `--stdin`, `--all`, or `--` is used, the first argument +will be treated as an attribute and the rest of the arguments as +pathnames. + +OUTPUT +------ + +The output is of the form: +<path> COLON SP <attribute> COLON SP <info> LF + +unless `-z` is in effect, in which case NUL is used as delimiter: +<path> NUL <attribute> NUL <info> NUL + + +<path> is the path of a file being queried, <attribute> is an attribute +being queried and <info> can be either: + +'unspecified';; when the attribute is not defined for the path. +'unset';; when the attribute is defined as false. +'set';; when the attribute is defined as true. +<value>;; when a value has been assigned to the attribute. + +Buffering happens as documented under the `GIT_FLUSH` option in +linkgit:git[1]. The caller is responsible for avoiding deadlocks +caused by overfilling an input buffer or reading from an empty output +buffer. + +EXAMPLES +-------- + +In the examples, the following '.gitattributes' file is used: +--------------- +*.java diff=java -crlf myAttr +NoMyAttr.java !myAttr +README caveat=unspecified +--------------- + +* Listing a single attribute: +--------------- +$ git check-attr diff org/example/MyClass.java +org/example/MyClass.java: diff: java +--------------- + +* Listing multiple attributes for a file: +--------------- +$ git check-attr crlf diff myAttr -- org/example/MyClass.java +org/example/MyClass.java: crlf: unset +org/example/MyClass.java: diff: java +org/example/MyClass.java: myAttr: set +--------------- + +* Listing all attributes for a file: +--------------- +$ git check-attr --all -- org/example/MyClass.java +org/example/MyClass.java: diff: java +org/example/MyClass.java: myAttr: set +--------------- + +* Listing an attribute for multiple files: +--------------- +$ git check-attr myAttr -- org/example/MyClass.java org/example/NoMyAttr.java +org/example/MyClass.java: myAttr: set +org/example/NoMyAttr.java: myAttr: unspecified +--------------- + +* Not all values are equally unambiguous: +--------------- +$ git check-attr caveat README +README: caveat: unspecified +--------------- + +SEE ALSO +-------- +linkgit:gitattributes[5]. + +GIT +--- +Part of the linkgit:git[1] suite diff --git a/Documentation/git-check-ignore.txt b/Documentation/git-check-ignore.txt new file mode 100644 index 0000000..611754f --- /dev/null +++ b/Documentation/git-check-ignore.txt @@ -0,0 +1,120 @@ +git-check-ignore(1) +=================== + +NAME +---- +git-check-ignore - Debug gitignore / exclude files + + +SYNOPSIS +-------- +[verse] +'git check-ignore' [options] pathname... +'git check-ignore' [options] --stdin + +DESCRIPTION +----------- + +For each pathname given via the command-line or from a file via +`--stdin`, check whether the file is excluded by .gitignore (or other +input files to the exclude mechanism) and output the path if it is +excluded. + +By default, tracked files are not shown at all since they are not +subject to exclude rules; but see `--no-index'. + +OPTIONS +------- +-q, --quiet:: + Don't output anything, just set exit status. This is only + valid with a single pathname. + +-v, --verbose:: + Also output details about the matching pattern (if any) + for each given pathname. For precedence rules within and + between exclude sources, see linkgit:gitignore[5]. + +--stdin:: + Read pathnames from the standard input, one per line, + instead of from the command-line. + +-z:: + The output format is modified to be machine-parseable (see + below). If `--stdin` is also given, input paths are separated + with a NUL character instead of a linefeed character. + +-n, --non-matching:: + Show given paths which don't match any pattern. This only + makes sense when `--verbose` is enabled, otherwise it would + not be possible to distinguish between paths which match a + pattern and those which don't. + +--no-index:: + Don't look in the index when undertaking the checks. This can + be used to debug why a path became tracked by e.g. `git add .` + and was not ignored by the rules as expected by the user or when + developing patterns including negation to match a path previously + added with `git add -f`. + +OUTPUT +------ + +By default, any of the given pathnames which match an ignore pattern +will be output, one per line. If no pattern matches a given path, +nothing will be output for that path; this means that path will not be +ignored. + +If `--verbose` is specified, the output is a series of lines of the form: + +<source> <COLON> <linenum> <COLON> <pattern> <HT> <pathname> + +<pathname> is the path of a file being queried, <pattern> is the +matching pattern, <source> is the pattern's source file, and <linenum> +is the line number of the pattern within that source. If the pattern +contained a `!` prefix or `/` suffix, it will be preserved in the +output. <source> will be an absolute path when referring to the file +configured by `core.excludesFile`, or relative to the repository root +when referring to `.git/info/exclude` or a per-directory exclude file. + +If `-z` is specified, the pathnames in the output are delimited by the +null character; if `--verbose` is also specified then null characters +are also used instead of colons and hard tabs: + +<source> <NULL> <linenum> <NULL> <pattern> <NULL> <pathname> <NULL> + +If `-n` or `--non-matching` are specified, non-matching pathnames will +also be output, in which case all fields in each output record except +for <pathname> will be empty. This can be useful when running +non-interactively, so that files can be incrementally streamed to +STDIN of a long-running check-ignore process, and for each of these +files, STDOUT will indicate whether that file matched a pattern or +not. (Without this option, it would be impossible to tell whether the +absence of output for a given file meant that it didn't match any +pattern, or that the output hadn't been generated yet.) + +Buffering happens as documented under the `GIT_FLUSH` option in +linkgit:git[1]. The caller is responsible for avoiding deadlocks +caused by overfilling an input buffer or reading from an empty output +buffer. + +EXIT STATUS +----------- + +0:: + One or more of the provided paths is ignored. + +1:: + None of the provided paths are ignored. + +128:: + A fatal error was encountered. + +SEE ALSO +-------- +linkgit:gitignore[5] +linkgit:git-config[1] +linkgit:git-ls-files[1] + +GIT +--- +Part of the linkgit:git[1] suite diff --git a/Documentation/git-check-mailmap.txt b/Documentation/git-check-mailmap.txt new file mode 100644 index 0000000..39028ee --- /dev/null +++ b/Documentation/git-check-mailmap.txt @@ -0,0 +1,47 @@ +git-check-mailmap(1) +==================== + +NAME +---- +git-check-mailmap - Show canonical names and email addresses of contacts + + +SYNOPSIS +-------- +[verse] +'git check-mailmap' [options] <contact>... + + +DESCRIPTION +----------- + +For each ``Name $$<user@host>$$'' or ``$$<user@host>$$'' from the command-line +or standard input (when using `--stdin`), look up the person's canonical name +and email address (see "Mapping Authors" below). If found, print them; +otherwise print the input as-is. + + +OPTIONS +------- +--stdin:: + Read contacts, one per line, from the standard input after exhausting + contacts provided on the command-line. + + +OUTPUT +------ + +For each contact, a single line is output, terminated by a newline. If the +name is provided or known to the 'mailmap', ``Name $$<user@host>$$'' is +printed; otherwise only ``$$<user@host>$$'' is printed. + + +MAPPING AUTHORS +--------------- + +include::mailmap.txt[] + + +GIT +--- +Part of the linkgit:git[1] suite diff --git a/Documentation/git-check-ref-format.txt b/Documentation/git-check-ref-format.txt new file mode 100644 index 0000000..91a3622 --- /dev/null +++ b/Documentation/git-check-ref-format.txt @@ -0,0 +1,127 @@ +git-check-ref-format(1) +======================= + +NAME +---- +git-check-ref-format - Ensures that a reference name is well formed + +SYNOPSIS +-------- +[verse] +'git check-ref-format' [--normalize] + [--[no-]allow-onelevel] [--refspec-pattern] + <refname> +'git check-ref-format' --branch <branchname-shorthand> + +DESCRIPTION +----------- +Checks if a given 'refname' is acceptable, and exits with a non-zero +status if it is not. + +A reference is used in Git to specify branches and tags. A +branch head is stored in the `refs/heads` hierarchy, while +a tag is stored in the `refs/tags` hierarchy of the ref namespace +(typically in `$GIT_DIR/refs/heads` and `$GIT_DIR/refs/tags` +directories or, as entries in file `$GIT_DIR/packed-refs` +if refs are packed by `git gc`). + +Git imposes the following rules on how references are named: + +. They can include slash `/` for hierarchical (directory) + grouping, but no slash-separated component can begin with a + dot `.` or end with the sequence `.lock`. + +. They must contain at least one `/`. This enforces the presence of a + category like `heads/`, `tags/` etc. but the actual names are not + restricted. If the `--allow-onelevel` option is used, this rule + is waived. + +. They cannot have two consecutive dots `..` anywhere. + +. They cannot have ASCII control characters (i.e. bytes whose + values are lower than \040, or \177 `DEL`), space, tilde `~`, + caret `^`, or colon `:` anywhere. + +. They cannot have question-mark `?`, asterisk `*`, or open + bracket `[` anywhere. See the `--refspec-pattern` option below for + an exception to this rule. + +. They cannot begin or end with a slash `/` or contain multiple + consecutive slashes (see the `--normalize` option below for an + exception to this rule) + +. They cannot end with a dot `.`. + +. They cannot contain a sequence `@{`. + +. They cannot be the single character `@`. + +. They cannot contain a `\`. + +These rules make it easy for shell script based tools to parse +reference names, pathname expansion by the shell when a reference name is used +unquoted (by mistake), and also avoid ambiguities in certain +reference name expressions (see linkgit:gitrevisions[7]): + +. A double-dot `..` is often used as in `ref1..ref2`, and in some + contexts this notation means `^ref1 ref2` (i.e. not in + `ref1` and in `ref2`). + +. A tilde `~` and caret `^` are used to introduce the postfix + 'nth parent' and 'peel onion' operation. + +. A colon `:` is used as in `srcref:dstref` to mean "use srcref\'s + value and store it in dstref" in fetch and push operations. + It may also be used to select a specific object such as with + 'git cat-file': "git cat-file blob v1.3.3:refs.c". + +. at-open-brace `@{` is used as a notation to access a reflog entry. + +With the `--branch` option, it expands the ``previous branch syntax'' +`@{-n}`. For example, `@{-1}` is a way to refer the last branch you +were on. This option should be used by porcelains to accept this +syntax anywhere a branch name is expected, so they can act as if you +typed the branch name. + +OPTIONS +------- +--[no-]allow-onelevel:: + Controls whether one-level refnames are accepted (i.e., + refnames that do not contain multiple `/`-separated + components). The default is `--no-allow-onelevel`. + +--refspec-pattern:: + Interpret <refname> as a reference name pattern for a refspec + (as used with remote repositories). If this option is + enabled, <refname> is allowed to contain a single `*` + in the refspec (e.g., `foo/bar*/baz` or `foo/bar*baz/` + but not `foo/bar*/baz*`). + +--normalize:: + Normalize 'refname' by removing any leading slash (`/`) + characters and collapsing runs of adjacent slashes between + name components into a single slash. Iff the normalized + refname is valid then print it to standard output and exit + with a status of 0. (`--print` is a deprecated way to spell + `--normalize`.) + + +EXAMPLES +-------- + +* Print the name of the previous branch: ++ +------------ +$ git check-ref-format --branch @{-1} +------------ + +* Determine the reference name to use for a new branch: ++ +------------ +$ ref=$(git check-ref-format --normalize "refs/heads/$newbranch") || +die "we do not like '$newbranch' as a branch name." +------------ + +GIT +--- +Part of the linkgit:git[1] suite diff --git a/Documentation/git-checkout-index.txt b/Documentation/git-checkout-index.txt new file mode 100644 index 0000000..4d33e7b --- /dev/null +++ b/Documentation/git-checkout-index.txt @@ -0,0 +1,177 @@ +git-checkout-index(1) +===================== + +NAME +---- +git-checkout-index - Copy files from the index to the working tree + + +SYNOPSIS +-------- +[verse] +'git checkout-index' [-u] [-q] [-a] [-f] [-n] [--prefix=<string>] + [--stage=<number>|all] + [--temp] + [-z] [--stdin] + [--] [<file>...] + +DESCRIPTION +----------- +Will copy all files listed from the index to the working directory +(not overwriting existing files). + +OPTIONS +------- +-u:: +--index:: + update stat information for the checked out entries in + the index file. + +-q:: +--quiet:: + be quiet if files exist or are not in the index + +-f:: +--force:: + forces overwrite of existing files + +-a:: +--all:: + checks out all files in the index. Cannot be used + together with explicit filenames. + +-n:: +--no-create:: + Don't checkout new files, only refresh files already checked + out. + +--prefix=<string>:: + When creating files, prepend <string> (usually a directory + including a trailing /) + +--stage=<number>|all:: + Instead of checking out unmerged entries, copy out the + files from named stage. <number> must be between 1 and 3. + Note: --stage=all automatically implies --temp. + +--temp:: + Instead of copying the files to the working directory + write the content to temporary files. The temporary name + associations will be written to stdout. + +--stdin:: + Instead of taking list of paths from the command line, + read list of paths from the standard input. Paths are + separated by LF (i.e. one path per line) by default. + +-z:: + Only meaningful with `--stdin`; paths are separated with + NUL character instead of LF. + +\--:: + Do not interpret any more arguments as options. + +The order of the flags used to matter, but not anymore. + +Just doing `git checkout-index` does nothing. You probably meant +`git checkout-index -a`. And if you want to force it, you want +`git checkout-index -f -a`. + +Intuitiveness is not the goal here. Repeatability is. The reason for +the "no arguments means no work" behavior is that from scripts you are +supposed to be able to do: + +---------------- +$ find . -name '*.h' -print0 | xargs -0 git checkout-index -f -- +---------------- + +which will force all existing `*.h` files to be replaced with their +cached copies. If an empty command line implied "all", then this would +force-refresh everything in the index, which was not the point. But +since 'git checkout-index' accepts --stdin it would be faster to use: + +---------------- +$ find . -name '*.h' -print0 | git checkout-index -f -z --stdin +---------------- + +The `--` is just a good idea when you know the rest will be filenames; +it will prevent problems with a filename of, for example, `-a`. +Using `--` is probably a good policy in scripts. + + +Using --temp or --stage=all +--------------------------- +When `--temp` is used (or implied by `--stage=all`) +'git checkout-index' will create a temporary file for each index +entry being checked out. The index will not be updated with stat +information. These options can be useful if the caller needs all +stages of all unmerged entries so that the unmerged files can be +processed by an external merge tool. + +A listing will be written to stdout providing the association of +temporary file names to tracked path names. The listing format +has two variations: + + . tempname TAB path RS ++ +The first format is what gets used when `--stage` is omitted or +is not `--stage=all`. The field tempname is the temporary file +name holding the file content and path is the tracked path name in +the index. Only the requested entries are output. + + . stage1temp SP stage2temp SP stage3tmp TAB path RS ++ +The second format is what gets used when `--stage=all`. The three +stage temporary fields (stage1temp, stage2temp, stage3temp) list the +name of the temporary file if there is a stage entry in the index +or `.` if there is no stage entry. Paths which only have a stage 0 +entry will always be omitted from the output. + +In both formats RS (the record separator) is newline by default +but will be the null byte if -z was passed on the command line. +The temporary file names are always safe strings; they will never +contain directory separators or whitespace characters. The path +field is always relative to the current directory and the temporary +file names are always relative to the top level directory. + +If the object being copied out to a temporary file is a symbolic +link the content of the link will be written to a normal file. It is +up to the end-user or the Porcelain to make use of this information. + + +EXAMPLES +-------- +To update and refresh only the files already checked out:: ++ +---------------- +$ git checkout-index -n -f -a && git update-index --ignore-missing --refresh +---------------- + +Using 'git checkout-index' to "export an entire tree":: + The prefix ability basically makes it trivial to use + 'git checkout-index' as an "export as tree" function. + Just read the desired tree into the index, and do: ++ +---------------- +$ git checkout-index --prefix=git-export-dir/ -a +---------------- ++ +`git checkout-index` will "export" the index into the specified +directory. ++ +The final "/" is important. The exported name is literally just +prefixed with the specified string. Contrast this with the +following example. + +Export files with a prefix:: ++ +---------------- +$ git checkout-index --prefix=.merged- Makefile +---------------- ++ +This will check out the currently cached copy of `Makefile` +into the file `.merged-Makefile`. + +GIT +--- +Part of the linkgit:git[1] suite diff --git a/Documentation/git-checkout.txt b/Documentation/git-checkout.txt new file mode 100644 index 0000000..5e5273e --- /dev/null +++ b/Documentation/git-checkout.txt @@ -0,0 +1,510 @@ +git-checkout(1) +=============== + +NAME +---- +git-checkout - Switch branches or restore working tree files + +SYNOPSIS +-------- +[verse] +'git checkout' [-q] [-f] [-m] [<branch>] +'git checkout' [-q] [-f] [-m] --detach [<branch>] +'git checkout' [-q] [-f] [-m] [--detach] <commit> +'git checkout' [-q] [-f] [-m] [[-b|-B|--orphan] <new_branch>] [<start_point>] +'git checkout' [-f|--ours|--theirs|-m|--conflict=<style>] [<tree-ish>] [--] <paths>... +'git checkout' [-p|--patch] [<tree-ish>] [--] [<paths>...] + +DESCRIPTION +----------- +Updates files in the working tree to match the version in the index +or the specified tree. If no paths are given, 'git checkout' will +also update `HEAD` to set the specified branch as the current +branch. + +'git checkout' <branch>:: + To prepare for working on <branch>, switch to it by updating + the index and the files in the working tree, and by pointing + HEAD at the branch. Local modifications to the files in the + working tree are kept, so that they can be committed to the + <branch>. ++ +If <branch> is not found but there does exist a tracking branch in +exactly one remote (call it <remote>) with a matching name, treat as +equivalent to ++ +------------ +$ git checkout -b <branch> --track <remote>/<branch> +------------ ++ +You could omit <branch>, in which case the command degenerates to +"check out the current branch", which is a glorified no-op with a +rather expensive side-effects to show only the tracking information, +if exists, for the current branch. + +'git checkout' -b|-B <new_branch> [<start point>]:: + + Specifying `-b` causes a new branch to be created as if + linkgit:git-branch[1] were called and then checked out. In + this case you can use the `--track` or `--no-track` options, + which will be passed to 'git branch'. As a convenience, + `--track` without `-b` implies branch creation; see the + description of `--track` below. ++ +If `-B` is given, <new_branch> is created if it doesn't exist; otherwise, it +is reset. This is the transactional equivalent of ++ +------------ +$ git branch -f <branch> [<start point>] +$ git checkout <branch> +------------ ++ +that is to say, the branch is not reset/created unless "git checkout" is +successful. + +'git checkout' --detach [<branch>]:: +'git checkout' [--detach] <commit>:: + + Prepare to work on top of <commit>, by detaching HEAD at it + (see "DETACHED HEAD" section), and updating the index and the + files in the working tree. Local modifications to the files + in the working tree are kept, so that the resulting working + tree will be the state recorded in the commit plus the local + modifications. ++ +When the <commit> argument is a branch name, the `--detach` option can +be used to detach HEAD at the tip of the branch (`git checkout +<branch>` would check out that branch without detaching HEAD). ++ +Omitting <branch> detaches HEAD at the tip of the current branch. + +'git checkout' [-p|--patch] [<tree-ish>] [--] <pathspec>...:: + + When <paths> or `--patch` are given, 'git checkout' does *not* + switch branches. It updates the named paths in the working tree + from the index file or from a named <tree-ish> (most often a + commit). In this case, the `-b` and `--track` options are + meaningless and giving either of them results in an error. The + <tree-ish> argument can be used to specify a specific tree-ish + (i.e. commit, tag or tree) to update the index for the given + paths before updating the working tree. ++ +'git checkout' with <paths> or `--patch` is used to restore modified or +deleted paths to their original contents from the index or replace paths +with the contents from a named <tree-ish> (most often a commit-ish). ++ +The index may contain unmerged entries because of a previous failed merge. +By default, if you try to check out such an entry from the index, the +checkout operation will fail and nothing will be checked out. +Using `-f` will ignore these unmerged entries. The contents from a +specific side of the merge can be checked out of the index by +using `--ours` or `--theirs`. With `-m`, changes made to the working tree +file can be discarded to re-create the original conflicted merge result. + +OPTIONS +------- +-q:: +--quiet:: + Quiet, suppress feedback messages. + +--[no-]progress:: + Progress status is reported on the standard error stream + by default when it is attached to a terminal, unless `--quiet` + is specified. This flag enables progress reporting even if not + attached to a terminal, regardless of `--quiet`. + +-f:: +--force:: + When switching branches, proceed even if the index or the + working tree differs from HEAD. This is used to throw away + local changes. ++ +When checking out paths from the index, do not fail upon unmerged +entries; instead, unmerged entries are ignored. + +--ours:: +--theirs:: + When checking out paths from the index, check out stage #2 + ('ours') or #3 ('theirs') for unmerged paths. ++ +Note that during `git rebase` and `git pull --rebase`, 'ours' and +'theirs' may appear swapped; `--ours` gives the version from the +branch the changes are rebased onto, while `--theirs` gives the +version from the branch that holds your work that is being rebased. ++ +This is because `rebase` is used in a workflow that treats the +history at the remote as the shared canonical one, and treats the +work done on the branch you are rebasing as the third-party work to +be integrated, and you are temporarily assuming the role of the +keeper of the canonical history during the rebase. As the keeper of +the canonical history, you need to view the history from the remote +as `ours` (i.e. "our shared canonical history"), while what you did +on your side branch as `theirs` (i.e. "one contributor's work on top +of it"). + +-b <new_branch>:: + Create a new branch named <new_branch> and start it at + <start_point>; see linkgit:git-branch[1] for details. + +-B <new_branch>:: + Creates the branch <new_branch> and start it at <start_point>; + if it already exists, then reset it to <start_point>. This is + equivalent to running "git branch" with "-f"; see + linkgit:git-branch[1] for details. + +-t:: +--track:: + When creating a new branch, set up "upstream" configuration. See + "--track" in linkgit:git-branch[1] for details. ++ +If no '-b' option is given, the name of the new branch will be +derived from the remote-tracking branch, by looking at the local part of +the refspec configured for the corresponding remote, and then stripping +the initial part up to the "*". +This would tell us to use "hack" as the local branch when branching +off of "origin/hack" (or "remotes/origin/hack", or even +"refs/remotes/origin/hack"). If the given name has no slash, or the above +guessing results in an empty name, the guessing is aborted. You can +explicitly give a name with '-b' in such a case. + +--no-track:: + Do not set up "upstream" configuration, even if the + branch.autoSetupMerge configuration variable is true. + +-l:: + Create the new branch's reflog; see linkgit:git-branch[1] for + details. + +--detach:: + Rather than checking out a branch to work on it, check out a + commit for inspection and discardable experiments. + This is the default behavior of "git checkout <commit>" when + <commit> is not a branch name. See the "DETACHED HEAD" section + below for details. + +--orphan <new_branch>:: + Create a new 'orphan' branch, named <new_branch>, started from + <start_point> and switch to it. The first commit made on this + new branch will have no parents and it will be the root of a new + history totally disconnected from all the other branches and + commits. ++ +The index and the working tree are adjusted as if you had previously run +"git checkout <start_point>". This allows you to start a new history +that records a set of paths similar to <start_point> by easily running +"git commit -a" to make the root commit. ++ +This can be useful when you want to publish the tree from a commit +without exposing its full history. You might want to do this to publish +an open source branch of a project whose current tree is "clean", but +whose full history contains proprietary or otherwise encumbered bits of +code. ++ +If you want to start a disconnected history that records a set of paths +that is totally different from the one of <start_point>, then you should +clear the index and the working tree right after creating the orphan +branch by running "git rm -rf ." from the top level of the working tree. +Afterwards you will be ready to prepare your new files, repopulating the +working tree, by copying them from elsewhere, extracting a tarball, etc. + +--ignore-skip-worktree-bits:: + In sparse checkout mode, `git checkout -- <paths>` would + update only entries matched by <paths> and sparse patterns + in $GIT_DIR/info/sparse-checkout. This option ignores + the sparse patterns and adds back any files in <paths>. + +-m:: +--merge:: + When switching branches, + if you have local modifications to one or more files that + are different between the current branch and the branch to + which you are switching, the command refuses to switch + branches in order to preserve your modifications in context. + However, with this option, a three-way merge between the current + branch, your working tree contents, and the new branch + is done, and you will be on the new branch. ++ +When a merge conflict happens, the index entries for conflicting +paths are left unmerged, and you need to resolve the conflicts +and mark the resolved paths with `git add` (or `git rm` if the merge +should result in deletion of the path). ++ +When checking out paths from the index, this option lets you recreate +the conflicted merge in the specified paths. + +--conflict=<style>:: + The same as --merge option above, but changes the way the + conflicting hunks are presented, overriding the + merge.conflictStyle configuration variable. Possible values are + "merge" (default) and "diff3" (in addition to what is shown by + "merge" style, shows the original contents). + +-p:: +--patch:: + Interactively select hunks in the difference between the + <tree-ish> (or the index, if unspecified) and the working + tree. The chosen hunks are then applied in reverse to the + working tree (and if a <tree-ish> was specified, the index). ++ +This means that you can use `git checkout -p` to selectively discard +edits from your current working tree. See the ``Interactive Mode'' +section of linkgit:git-add[1] to learn how to operate the `--patch` mode. + +--ignore-other-worktrees:: + `git checkout` refuses when the wanted ref is already checked + out by another worktree. This option makes it check the ref + out anyway. In other words, the ref can be held by more than one + worktree. + +<branch>:: + Branch to checkout; if it refers to a branch (i.e., a name that, + when prepended with "refs/heads/", is a valid ref), then that + branch is checked out. Otherwise, if it refers to a valid + commit, your HEAD becomes "detached" and you are no longer on + any branch (see below for details). ++ +As a special case, the `"@{-N}"` syntax for the N-th last branch/commit +checks out branches (instead of detaching). You may also specify +`-` which is synonymous with `"@{-1}"`. ++ +As a further special case, you may use `"A...B"` as a shortcut for the +merge base of `A` and `B` if there is exactly one merge base. You can +leave out at most one of `A` and `B`, in which case it defaults to `HEAD`. + +<new_branch>:: + Name for the new branch. + +<start_point>:: + The name of a commit at which to start the new branch; see + linkgit:git-branch[1] for details. Defaults to HEAD. + +<tree-ish>:: + Tree to checkout from (when paths are given). If not specified, + the index will be used. + + + +DETACHED HEAD +------------- +HEAD normally refers to a named branch (e.g. 'master'). Meanwhile, each +branch refers to a specific commit. Let's look at a repo with three +commits, one of them tagged, and with branch 'master' checked out: + +------------ + HEAD (refers to branch 'master') + | + v +a---b---c branch 'master' (refers to commit 'c') + ^ + | + tag 'v2.0' (refers to commit 'b') +------------ + +When a commit is created in this state, the branch is updated to refer to +the new commit. Specifically, 'git commit' creates a new commit 'd', whose +parent is commit 'c', and then updates branch 'master' to refer to new +commit 'd'. HEAD still refers to branch 'master' and so indirectly now refers +to commit 'd': + +------------ +$ edit; git add; git commit + + HEAD (refers to branch 'master') + | + v +a---b---c---d branch 'master' (refers to commit 'd') + ^ + | + tag 'v2.0' (refers to commit 'b') +------------ + +It is sometimes useful to be able to checkout a commit that is not at +the tip of any named branch, or even to create a new commit that is not +referenced by a named branch. Let's look at what happens when we +checkout commit 'b' (here we show two ways this may be done): + +------------ +$ git checkout v2.0 # or +$ git checkout master^^ + + HEAD (refers to commit 'b') + | + v +a---b---c---d branch 'master' (refers to commit 'd') + ^ + | + tag 'v2.0' (refers to commit 'b') +------------ + +Notice that regardless of which checkout command we use, HEAD now refers +directly to commit 'b'. This is known as being in detached HEAD state. +It means simply that HEAD refers to a specific commit, as opposed to +referring to a named branch. Let's see what happens when we create a commit: + +------------ +$ edit; git add; git commit + + HEAD (refers to commit 'e') + | + v + e + / +a---b---c---d branch 'master' (refers to commit 'd') + ^ + | + tag 'v2.0' (refers to commit 'b') +------------ + +There is now a new commit 'e', but it is referenced only by HEAD. We can +of course add yet another commit in this state: + +------------ +$ edit; git add; git commit + + HEAD (refers to commit 'f') + | + v + e---f + / +a---b---c---d branch 'master' (refers to commit 'd') + ^ + | + tag 'v2.0' (refers to commit 'b') +------------ + +In fact, we can perform all the normal Git operations. But, let's look +at what happens when we then checkout master: + +------------ +$ git checkout master + + HEAD (refers to branch 'master') + e---f | + / v +a---b---c---d branch 'master' (refers to commit 'd') + ^ + | + tag 'v2.0' (refers to commit 'b') +------------ + +It is important to realize that at this point nothing refers to commit +'f'. Eventually commit 'f' (and by extension commit 'e') will be deleted +by the routine Git garbage collection process, unless we create a reference +before that happens. If we have not yet moved away from commit 'f', +any of these will create a reference to it: + +------------ +$ git checkout -b foo <1> +$ git branch foo <2> +$ git tag foo <3> +------------ + +<1> creates a new branch 'foo', which refers to commit 'f', and then +updates HEAD to refer to branch 'foo'. In other words, we'll no longer +be in detached HEAD state after this command. + +<2> similarly creates a new branch 'foo', which refers to commit 'f', +but leaves HEAD detached. + +<3> creates a new tag 'foo', which refers to commit 'f', +leaving HEAD detached. + +If we have moved away from commit 'f', then we must first recover its object +name (typically by using git reflog), and then we can create a reference to +it. For example, to see the last two commits to which HEAD referred, we +can use either of these commands: + +------------ +$ git reflog -2 HEAD # or +$ git log -g -2 HEAD +------------ + +EXAMPLES +-------- + +. The following sequence checks out the `master` branch, reverts +the `Makefile` to two revisions back, deletes hello.c by +mistake, and gets it back from the index. ++ +------------ +$ git checkout master <1> +$ git checkout master~2 Makefile <2> +$ rm -f hello.c +$ git checkout hello.c <3> +------------ ++ +<1> switch branch +<2> take a file out of another commit +<3> restore hello.c from the index ++ +If you want to check out _all_ C source files out of the index, +you can say ++ +------------ +$ git checkout -- '*.c' +------------ ++ +Note the quotes around `*.c`. The file `hello.c` will also be +checked out, even though it is no longer in the working tree, +because the file globbing is used to match entries in the index +(not in the working tree by the shell). ++ +If you have an unfortunate branch that is named `hello.c`, this +step would be confused as an instruction to switch to that branch. +You should instead write: ++ +------------ +$ git checkout -- hello.c +------------ + +. After working in the wrong branch, switching to the correct +branch would be done using: ++ +------------ +$ git checkout mytopic +------------ ++ +However, your "wrong" branch and correct "mytopic" branch may +differ in files that you have modified locally, in which case +the above checkout would fail like this: ++ +------------ +$ git checkout mytopic +error: You have local changes to 'frotz'; not switching branches. +------------ ++ +You can give the `-m` flag to the command, which would try a +three-way merge: ++ +------------ +$ git checkout -m mytopic +Auto-merging frotz +------------ ++ +After this three-way merge, the local modifications are _not_ +registered in your index file, so `git diff` would show you what +changes you made since the tip of the new branch. + +. When a merge conflict happens during switching branches with +the `-m` option, you would see something like this: ++ +------------ +$ git checkout -m mytopic +Auto-merging frotz +ERROR: Merge conflict in frotz +fatal: merge program failed +------------ ++ +At this point, `git diff` shows the changes cleanly merged as in +the previous example, as well as the changes in the conflicted +files. Edit and resolve the conflict and mark it resolved with +`git add` as usual: ++ +------------ +$ edit frotz +$ git add frotz +------------ + +GIT +--- +Part of the linkgit:git[1] suite diff --git a/Documentation/git-cherry-pick.txt b/Documentation/git-cherry-pick.txt new file mode 100644 index 0000000..6154e57 --- /dev/null +++ b/Documentation/git-cherry-pick.txt @@ -0,0 +1,233 @@ +git-cherry-pick(1) +================== + +NAME +---- +git-cherry-pick - Apply the changes introduced by some existing commits + +SYNOPSIS +-------- +[verse] +'git cherry-pick' [--edit] [-n] [-m parent-number] [-s] [-x] [--ff] + [-S[<keyid>]] <commit>... +'git cherry-pick' --continue +'git cherry-pick' --quit +'git cherry-pick' --abort + +DESCRIPTION +----------- + +Given one or more existing commits, apply the change each one +introduces, recording a new commit for each. This requires your +working tree to be clean (no modifications from the HEAD commit). + +When it is not obvious how to apply a change, the following +happens: + +1. The current branch and `HEAD` pointer stay at the last commit + successfully made. +2. The `CHERRY_PICK_HEAD` ref is set to point at the commit that + introduced the change that is difficult to apply. +3. Paths in which the change applied cleanly are updated both + in the index file and in your working tree. +4. For conflicting paths, the index file records up to three + versions, as described in the "TRUE MERGE" section of + linkgit:git-merge[1]. The working tree files will include + a description of the conflict bracketed by the usual + conflict markers `<<<<<<<` and `>>>>>>>`. +5. No other modifications are made. + +See linkgit:git-merge[1] for some hints on resolving such +conflicts. + +OPTIONS +------- +<commit>...:: + Commits to cherry-pick. + For a more complete list of ways to spell commits, see + linkgit:gitrevisions[7]. + Sets of commits can be passed but no traversal is done by + default, as if the '--no-walk' option was specified, see + linkgit:git-rev-list[1]. Note that specifying a range will + feed all <commit>... arguments to a single revision walk + (see a later example that uses 'maint master..next'). + +-e:: +--edit:: + With this option, 'git cherry-pick' will let you edit the commit + message prior to committing. + +-x:: + When recording the commit, append a line that says + "(cherry picked from commit ...)" to the original commit + message in order to indicate which commit this change was + cherry-picked from. This is done only for cherry + picks without conflicts. Do not use this option if + you are cherry-picking from your private branch because + the information is useless to the recipient. If on the + other hand you are cherry-picking between two publicly + visible branches (e.g. backporting a fix to a + maintenance branch for an older release from a + development branch), adding this information can be + useful. + +-r:: + It used to be that the command defaulted to do `-x` + described above, and `-r` was to disable it. Now the + default is not to do `-x` so this option is a no-op. + +-m parent-number:: +--mainline parent-number:: + Usually you cannot cherry-pick a merge because you do not know which + side of the merge should be considered the mainline. This + option specifies the parent number (starting from 1) of + the mainline and allows cherry-pick to replay the change + relative to the specified parent. + +-n:: +--no-commit:: + Usually the command automatically creates a sequence of commits. + This flag applies the changes necessary to cherry-pick + each named commit to your working tree and the index, + without making any commit. In addition, when this + option is used, your index does not have to match the + HEAD commit. The cherry-pick is done against the + beginning state of your index. ++ +This is useful when cherry-picking more than one commits' +effect to your index in a row. + +-s:: +--signoff:: + Add Signed-off-by line at the end of the commit message. + See the signoff option in linkgit:git-commit[1] for more information. + +-S[<keyid>]:: +--gpg-sign[=<keyid>]:: + GPG-sign commits. The `keyid` argument is optional and + defaults to the committer identity; if specified, it must be + stuck to the option without a space. + +--ff:: + If the current HEAD is the same as the parent of the + cherry-pick'ed commit, then a fast forward to this commit will + be performed. + +--allow-empty:: + By default, cherry-picking an empty commit will fail, + indicating that an explicit invocation of `git commit + --allow-empty` is required. This option overrides that + behavior, allowing empty commits to be preserved automatically + in a cherry-pick. Note that when "--ff" is in effect, empty + commits that meet the "fast-forward" requirement will be kept + even without this option. Note also, that use of this option only + keeps commits that were initially empty (i.e. the commit recorded the + same tree as its parent). Commits which are made empty due to a + previous commit are dropped. To force the inclusion of those commits + use `--keep-redundant-commits`. + +--allow-empty-message:: + By default, cherry-picking a commit with an empty message will fail. + This option overrides that behaviour, allowing commits with empty + messages to be cherry picked. + +--keep-redundant-commits:: + If a commit being cherry picked duplicates a commit already in the + current history, it will become empty. By default these + redundant commits cause `cherry-pick` to stop so the user can + examine the commit. This option overrides that behavior and + creates an empty commit object. Implies `--allow-empty`. + +--strategy=<strategy>:: + Use the given merge strategy. Should only be used once. + See the MERGE STRATEGIES section in linkgit:git-merge[1] + for details. + +-X<option>:: +--strategy-option=<option>:: + Pass the merge strategy-specific option through to the + merge strategy. See linkgit:git-merge[1] for details. + +SEQUENCER SUBCOMMANDS +--------------------- +include::sequencer.txt[] + +EXAMPLES +-------- +`git cherry-pick master`:: + + Apply the change introduced by the commit at the tip of the + master branch and create a new commit with this change. + +`git cherry-pick ..master`:: +`git cherry-pick ^HEAD master`:: + + Apply the changes introduced by all commits that are ancestors + of master but not of HEAD to produce new commits. + +`git cherry-pick maint next ^master`:: +`git cherry-pick maint master..next`:: + + Apply the changes introduced by all commits that are + ancestors of maint or next, but not master or any of its + ancestors. Note that the latter does not mean `maint` and + everything between `master` and `next`; specifically, + `maint` will not be used if it is included in `master`. + +`git cherry-pick master~4 master~2`:: + + Apply the changes introduced by the fifth and third last + commits pointed to by master and create 2 new commits with + these changes. + +`git cherry-pick -n master~1 next`:: + + Apply to the working tree and the index the changes introduced + by the second last commit pointed to by master and by the last + commit pointed to by next, but do not create any commit with + these changes. + +`git cherry-pick --ff ..next`:: + + If history is linear and HEAD is an ancestor of next, update + the working tree and advance the HEAD pointer to match next. + Otherwise, apply the changes introduced by those commits that + are in next but not HEAD to the current branch, creating a new + commit for each new change. + +`git rev-list --reverse master -- README | git cherry-pick -n --stdin`:: + + Apply the changes introduced by all commits on the master + branch that touched README to the working tree and index, + so the result can be inspected and made into a single new + commit if suitable. + +The following sequence attempts to backport a patch, bails out because +the code the patch applies to has changed too much, and then tries +again, this time exercising more care about matching up context lines. + +------------ +$ git cherry-pick topic^ <1> +$ git diff <2> +$ git reset --merge ORIG_HEAD <3> +$ git cherry-pick -Xpatience topic^ <4> +------------ +<1> apply the change that would be shown by `git show topic^`. +In this example, the patch does not apply cleanly, so +information about the conflict is written to the index and +working tree and no new commit results. +<2> summarize changes to be reconciled +<3> cancel the cherry-pick. In other words, return to the +pre-cherry-pick state, preserving any local modifications you had in +the working tree. +<4> try to apply the change introduced by `topic^` again, +spending extra time to avoid mistakes based on incorrectly matching +context lines. + +SEE ALSO +-------- +linkgit:git-revert[1] + +GIT +--- +Part of the linkgit:git[1] suite diff --git a/Documentation/git-cherry.txt b/Documentation/git-cherry.txt new file mode 100644 index 0000000..0ea921a --- /dev/null +++ b/Documentation/git-cherry.txt @@ -0,0 +1,145 @@ +git-cherry(1) +============= + +NAME +---- +git-cherry - Find commits yet to be applied to upstream + +SYNOPSIS +-------- +[verse] +'git cherry' [-v] [<upstream> [<head> [<limit>]]] + +DESCRIPTION +----------- +Determine whether there are commits in `<head>..<upstream>` that are +equivalent to those in the range `<limit>..<head>`. + +The equivalence test is based on the diff, after removing whitespace +and line numbers. git-cherry therefore detects when commits have been +"copied" by means of linkgit:git-cherry-pick[1], linkgit:git-am[1] or +linkgit:git-rebase[1]. + +Outputs the SHA1 of every commit in `<limit>..<head>`, prefixed with +`-` for commits that have an equivalent in <upstream>, and `+` for +commits that do not. + +OPTIONS +------- +-v:: + Show the commit subjects next to the SHA1s. + +<upstream>:: + Upstream branch to search for equivalent commits. + Defaults to the upstream branch of HEAD. + +<head>:: + Working branch; defaults to HEAD. + +<limit>:: + Do not report commits up to (and including) limit. + +EXAMPLES +-------- + +Patch workflows +~~~~~~~~~~~~~~~ + +git-cherry is frequently used in patch-based workflows (see +linkgit:gitworkflows[7]) to determine if a series of patches has been +applied by the upstream maintainer. In such a workflow you might +create and send a topic branch like this: + +------------ +$ git checkout -b topic origin/master +# work and create some commits +$ git format-patch origin/master +$ git send-email ... 00* +------------ + +Later, you can see whether your changes have been applied by saying +(still on `topic`): + +------------ +$ git fetch # update your notion of origin/master +$ git cherry -v +------------ + +Concrete example +~~~~~~~~~~~~~~~~ + +In a situation where topic consisted of three commits, and the +maintainer applied two of them, the situation might look like: + +------------ +$ git log --graph --oneline --decorate --boundary origin/master...topic +* 7654321 (origin/master) upstream tip commit +[... snip some other commits ...] +* cccc111 cherry-pick of C +* aaaa111 cherry-pick of A +[... snip a lot more that has happened ...] +| * cccc000 (topic) commit C +| * bbbb000 commit B +| * aaaa000 commit A +|/ +o 1234567 branch point +------------ + +In such cases, git-cherry shows a concise summary of what has yet to +be applied: + +------------ +$ git cherry origin/master topic +- cccc000... commit C ++ bbbb000... commit B +- aaaa000... commit A +------------ + +Here, we see that the commits A and C (marked with `-`) can be +dropped from your `topic` branch when you rebase it on top of +`origin/master`, while the commit B (marked with `+`) still needs to +be kept so that it will be sent to be applied to `origin/master`. + + +Using a limit +~~~~~~~~~~~~~ + +The optional <limit> is useful in cases where your topic is based on +other work that is not in upstream. Expanding on the previous +example, this might look like: + +------------ +$ git log --graph --oneline --decorate --boundary origin/master...topic +* 7654321 (origin/master) upstream tip commit +[... snip some other commits ...] +* cccc111 cherry-pick of C +* aaaa111 cherry-pick of A +[... snip a lot more that has happened ...] +| * cccc000 (topic) commit C +| * bbbb000 commit B +| * aaaa000 commit A +| * 0000fff (base) unpublished stuff F +[... snip ...] +| * 0000aaa unpublished stuff A +|/ +o 1234567 merge-base between upstream and topic +------------ + +By specifying `base` as the limit, you can avoid listing commits +between `base` and `topic`: + +------------ +$ git cherry origin/master topic base +- cccc000... commit C ++ bbbb000... commit B +- aaaa000... commit A +------------ + + +SEE ALSO +-------- +linkgit:git-patch-id[1] + +GIT +--- +Part of the linkgit:git[1] suite diff --git a/Documentation/git-citool.txt b/Documentation/git-citool.txt new file mode 100644 index 0000000..c7a11c3 --- /dev/null +++ b/Documentation/git-citool.txt @@ -0,0 +1,25 @@ +git-citool(1) +============= + +NAME +---- +git-citool - Graphical alternative to git-commit + +SYNOPSIS +-------- +[verse] +'git citool' + +DESCRIPTION +----------- +A Tcl/Tk based graphical interface to review modified files, stage +them into the index, enter a commit message and record the new +commit onto the current branch. This interface is an alternative +to the less interactive 'git commit' program. + +'git citool' is actually a standard alias for `git gui citool`. +See linkgit:git-gui[1] for more details. + +GIT +--- +Part of the linkgit:git[1] suite diff --git a/Documentation/git-clean.txt b/Documentation/git-clean.txt new file mode 100644 index 0000000..51a7e26 --- /dev/null +++ b/Documentation/git-clean.txt @@ -0,0 +1,141 @@ +git-clean(1) +============ + +NAME +---- +git-clean - Remove untracked files from the working tree + +SYNOPSIS +-------- +[verse] +'git clean' [-d] [-f] [-i] [-n] [-q] [-e <pattern>] [-x | -X] [--] <path>... + +DESCRIPTION +----------- + +Cleans the working tree by recursively removing files that are not +under version control, starting from the current directory. + +Normally, only files unknown to Git are removed, but if the '-x' +option is specified, ignored files are also removed. This can, for +example, be useful to remove all build products. + +If any optional `<path>...` arguments are given, only those paths +are affected. + +OPTIONS +------- +-d:: + Remove untracked directories in addition to untracked files. + If an untracked directory is managed by a different Git + repository, it is not removed by default. Use -f option twice + if you really want to remove such a directory. + +-f:: +--force:: + If the Git configuration variable clean.requireForce is not set + to false, 'git clean' will refuse to delete files or directories + unless given -f, -n or -i. Git will refuse to delete directories + with .git sub directory or file unless a second -f + is given. + +-i:: +--interactive:: + Show what would be done and clean files interactively. See + ``Interactive mode'' for details. + +-n:: +--dry-run:: + Don't actually remove anything, just show what would be done. + +-q:: +--quiet:: + Be quiet, only report errors, but not the files that are + successfully removed. + +-e <pattern>:: +--exclude=<pattern>:: + In addition to those found in .gitignore (per directory) and + $GIT_DIR/info/exclude, also consider these patterns to be in the + set of the ignore rules in effect. + +-x:: + Don't use the standard ignore rules read from .gitignore (per + directory) and $GIT_DIR/info/exclude, but do still use the ignore + rules given with `-e` options. This allows removing all untracked + files, including build products. This can be used (possibly in + conjunction with 'git reset') to create a pristine + working directory to test a clean build. + +-X:: + Remove only files ignored by Git. This may be useful to rebuild + everything from scratch, but keep manually created files. + +Interactive mode +---------------- +When the command enters the interactive mode, it shows the +files and directories to be cleaned, and goes into its +interactive command loop. + +The command loop shows the list of subcommands available, and +gives a prompt "What now> ". In general, when the prompt ends +with a single '>', you can pick only one of the choices given +and type return, like this: + +------------ + *** Commands *** + 1: clean 2: filter by pattern 3: select by numbers + 4: ask each 5: quit 6: help + What now> 1 +------------ + +You also could say `c` or `clean` above as long as the choice is unique. + +The main command loop has 6 subcommands. + +clean:: + + Start cleaning files and directories, and then quit. + +filter by pattern:: + + This shows the files and directories to be deleted and issues an + "Input ignore patterns>>" prompt. You can input space-separated + patterns to exclude files and directories from deletion. + E.g. "*.c *.h" will excludes files end with ".c" and ".h" from + deletion. When you are satisfied with the filtered result, press + ENTER (empty) back to the main menu. + +select by numbers:: + + This shows the files and directories to be deleted and issues an + "Select items to delete>>" prompt. When the prompt ends with double + '>>' like this, you can make more than one selection, concatenated + with whitespace or comma. Also you can say ranges. E.g. "2-5 7,9" + to choose 2,3,4,5,7,9 from the list. If the second number in a + range is omitted, all remaining items are selected. E.g. "7-" to + choose 7,8,9 from the list. You can say '*' to choose everything. + Also when you are satisfied with the filtered result, press ENTER + (empty) back to the main menu. + +ask each:: + + This will start to clean, and you must confirm one by one in order + to delete items. Please note that this action is not as efficient + as the above two actions. + +quit:: + + This lets you quit without do cleaning. + +help:: + + Show brief usage of interactive git-clean. + +SEE ALSO +-------- +linkgit:gitignore[5] + +GIT +--- +Part of the linkgit:git[1] suite diff --git a/Documentation/git-clone.txt b/Documentation/git-clone.txt new file mode 100644 index 0000000..b7c467a --- /dev/null +++ b/Documentation/git-clone.txt @@ -0,0 +1,278 @@ +git-clone(1) +============ + +NAME +---- +git-clone - Clone a repository into a new directory + + +SYNOPSIS +-------- +[verse] +'git clone' [--template=<template_directory>] + [-l] [-s] [--no-hardlinks] [-q] [-n] [--bare] [--mirror] + [-o <name>] [-b <name>] [-u <upload-pack>] [--reference <repository>] + [--dissociate] [--separate-git-dir <git dir>] + [--depth <depth>] [--[no-]single-branch] + [--recursive | --recurse-submodules] [--] <repository> + [<directory>] + +DESCRIPTION +----------- + +Clones a repository into a newly created directory, creates +remote-tracking branches for each branch in the cloned repository +(visible using `git branch -r`), and creates and checks out an +initial branch that is forked from the cloned repository's +currently active branch. + +After the clone, a plain `git fetch` without arguments will update +all the remote-tracking branches, and a `git pull` without +arguments will in addition merge the remote master branch into the +current master branch, if any (this is untrue when "--single-branch" +is given; see below). + +This default configuration is achieved by creating references to +the remote branch heads under `refs/remotes/origin` and +by initializing `remote.origin.url` and `remote.origin.fetch` +configuration variables. + + +OPTIONS +------- +--local:: +-l:: + When the repository to clone from is on a local machine, + this flag bypasses the normal "Git aware" transport + mechanism and clones the repository by making a copy of + HEAD and everything under objects and refs directories. + The files under `.git/objects/` directory are hardlinked + to save space when possible. ++ +If the repository is specified as a local path (e.g., `/path/to/repo`), +this is the default, and --local is essentially a no-op. If the +repository is specified as a URL, then this flag is ignored (and we +never use the local optimizations). Specifying `--no-local` will +override the default when `/path/to/repo` is given, using the regular +Git transport instead. + +--no-hardlinks:: + Force the cloning process from a repository on a local + filesystem to copy the files under the `.git/objects` + directory instead of using hardlinks. This may be desirable + if you are trying to make a back-up of your repository. + +--shared:: +-s:: + When the repository to clone is on the local machine, + instead of using hard links, automatically setup + `.git/objects/info/alternates` to share the objects + with the source repository. The resulting repository + starts out without any object of its own. ++ +*NOTE*: this is a possibly dangerous operation; do *not* use +it unless you understand what it does. If you clone your +repository using this option and then delete branches (or use any +other Git command that makes any existing commit unreferenced) in the +source repository, some objects may become unreferenced (or dangling). +These objects may be removed by normal Git operations (such as `git commit`) +which automatically call `git gc --auto`. (See linkgit:git-gc[1].) +If these objects are removed and were referenced by the cloned repository, +then the cloned repository will become corrupt. ++ +Note that running `git repack` without the `-l` option in a repository +cloned with `-s` will copy objects from the source repository into a pack +in the cloned repository, removing the disk space savings of `clone -s`. +It is safe, however, to run `git gc`, which uses the `-l` option by +default. ++ +If you want to break the dependency of a repository cloned with `-s` on +its source repository, you can simply run `git repack -a` to copy all +objects from the source repository into a pack in the cloned repository. + +--reference <repository>:: + If the reference repository is on the local machine, + automatically setup `.git/objects/info/alternates` to + obtain objects from the reference repository. Using + an already existing repository as an alternate will + require fewer objects to be copied from the repository + being cloned, reducing network and local storage costs. ++ +*NOTE*: see the NOTE for the `--shared` option, and also the +`--dissociate` option. + +--dissociate:: + Borrow the objects from reference repositories specified + with the `--reference` options only to reduce network + transfer, and stop borrowing from them after a clone is made + by making necessary local copies of borrowed objects. This + option can also be used when cloning locally from a + repository that already borrows objects from another + repository--the new repository will borrow objects from the + same repository, and this option can be used to stop the + borrowing. + +--quiet:: +-q:: + Operate quietly. Progress is not reported to the standard + error stream. + +--verbose:: +-v:: + Run verbosely. Does not affect the reporting of progress status + to the standard error stream. + +--progress:: + Progress status is reported on the standard error stream + by default when it is attached to a terminal, unless -q + is specified. This flag forces progress status even if the + standard error stream is not directed to a terminal. + +--no-checkout:: +-n:: + No checkout of HEAD is performed after the clone is complete. + +--bare:: + Make a 'bare' Git repository. That is, instead of + creating `<directory>` and placing the administrative + files in `<directory>/.git`, make the `<directory>` + itself the `$GIT_DIR`. This obviously implies the `-n` + because there is nowhere to check out the working tree. + Also the branch heads at the remote are copied directly + to corresponding local branch heads, without mapping + them to `refs/remotes/origin/`. When this option is + used, neither remote-tracking branches nor the related + configuration variables are created. + +--mirror:: + Set up a mirror of the source repository. This implies `--bare`. + Compared to `--bare`, `--mirror` not only maps local branches of the + source to local branches of the target, it maps all refs (including + remote-tracking branches, notes etc.) and sets up a refspec configuration such + that all these refs are overwritten by a `git remote update` in the + target repository. + +--origin <name>:: +-o <name>:: + Instead of using the remote name `origin` to keep track + of the upstream repository, use `<name>`. + +--branch <name>:: +-b <name>:: + Instead of pointing the newly created HEAD to the branch pointed + to by the cloned repository's HEAD, point to `<name>` branch + instead. In a non-bare repository, this is the branch that will + be checked out. + `--branch` can also take tags and detaches the HEAD at that commit + in the resulting repository. + +--upload-pack <upload-pack>:: +-u <upload-pack>:: + When given, and the repository to clone from is accessed + via ssh, this specifies a non-default path for the command + run on the other end. + +--template=<template_directory>:: + Specify the directory from which templates will be used; + (See the "TEMPLATE DIRECTORY" section of linkgit:git-init[1].) + +--config <key>=<value>:: +-c <key>=<value>:: + Set a configuration variable in the newly-created repository; + this takes effect immediately after the repository is + initialized, but before the remote history is fetched or any + files checked out. The key is in the same format as expected by + linkgit:git-config[1] (e.g., `core.eol=true`). If multiple + values are given for the same key, each value will be written to + the config file. This makes it safe, for example, to add + additional fetch refspecs to the origin remote. + +--depth <depth>:: + Create a 'shallow' clone with a history truncated to the + specified number of commits. Implies `--single-branch` unless + `--no-single-branch` is given to fetch the histories near the + tips of all branches. + +--[no-]single-branch:: + Clone only the history leading to the tip of a single branch, + either specified by the `--branch` option or the primary + branch remote's `HEAD` points at. + Further fetches into the resulting repository will only update the + remote-tracking branch for the branch this option was used for the + initial cloning. If the HEAD at the remote did not point at any + branch when `--single-branch` clone was made, no remote-tracking + branch is created. + +--recursive:: +--recurse-submodules:: + After the clone is created, initialize all submodules within, + using their default settings. This is equivalent to running + `git submodule update --init --recursive` immediately after + the clone is finished. This option is ignored if the cloned + repository does not have a worktree/checkout (i.e. if any of + `--no-checkout`/`-n`, `--bare`, or `--mirror` is given) + +--separate-git-dir=<git dir>:: + Instead of placing the cloned repository where it is supposed + to be, place the cloned repository at the specified directory, + then make a filesystem-agnostic Git symbolic link to there. + The result is Git repository can be separated from working + tree. + + +<repository>:: + The (possibly remote) repository to clone from. See the + <<URLS,URLS>> section below for more information on specifying + repositories. + +<directory>:: + The name of a new directory to clone into. The "humanish" + part of the source repository is used if no directory is + explicitly given (`repo` for `/path/to/repo.git` and `foo` + for `host.xz:foo/.git`). Cloning into an existing directory + is only allowed if the directory is empty. + +:git-clone: 1 +include::urls.txt[] + +Examples +-------- + +* Clone from upstream: ++ +------------ +$ git clone git://git.kernel.org/pub/scm/.../linux.git my-linux +$ cd my-linux +$ make +------------ + + +* Make a local clone that borrows from the current directory, without checking things out: ++ +------------ +$ git clone -l -s -n . ../copy +$ cd ../copy +$ git show-branch +------------ + + +* Clone from upstream while borrowing from an existing local directory: ++ +------------ +$ git clone --reference /git/linux.git \ + git://git.kernel.org/pub/scm/.../linux.git \ + my-linux +$ cd my-linux +------------ + + +* Create a bare repository to publish your changes to the public: ++ +------------ +$ git clone --bare -l /home/proj/.git /pub/scm/proj.git +------------ + + +GIT +--- +Part of the linkgit:git[1] suite diff --git a/Documentation/git-column.txt b/Documentation/git-column.txt new file mode 100644 index 0000000..03d1846 --- /dev/null +++ b/Documentation/git-column.txt @@ -0,0 +1,48 @@ +git-column(1) +============= + +NAME +---- +git-column - Display data in columns + +SYNOPSIS +-------- +[verse] +'git column' [--command=<name>] [--[raw-]mode=<mode>] [--width=<width>] + [--indent=<string>] [--nl=<string>] [--padding=<n>] + +DESCRIPTION +----------- +This command formats its input into multiple columns. + +OPTIONS +------- +--command=<name>:: + Look up layout mode using configuration variable column.<name> and + column.ui. + +--mode=<mode>:: + Specify layout mode. See configuration variable column.ui for option + syntax. + +--raw-mode=<n>:: + Same as --mode but take mode encoded as a number. This is mainly used + by other commands that have already parsed layout mode. + +--width=<width>:: + Specify the terminal width. By default 'git column' will detect the + terminal width, or fall back to 80 if it is unable to do so. + +--indent=<string>:: + String to be printed at the beginning of each line. + +--nl=<N>:: + String to be printed at the end of each line, + including newline character. + +--padding=<N>:: + The number of spaces between columns. One space by default. + +GIT +--- +Part of the linkgit:git[1] suite diff --git a/Documentation/git-commit-tree.txt b/Documentation/git-commit-tree.txt new file mode 100644 index 0000000..48c33d7 --- /dev/null +++ b/Documentation/git-commit-tree.txt @@ -0,0 +1,118 @@ +git-commit-tree(1) +================== + +NAME +---- +git-commit-tree - Create a new commit object + + +SYNOPSIS +-------- +[verse] +'git commit-tree' <tree> [(-p <parent>)...] +'git commit-tree' [(-p <parent>)...] [-S[<keyid>]] [(-m <message>)...] + [(-F <file>)...] <tree> + + +DESCRIPTION +----------- +This is usually not what an end user wants to run directly. See +linkgit:git-commit[1] instead. + +Creates a new commit object based on the provided tree object and +emits the new commit object id on stdout. The log message is read +from the standard input, unless `-m` or `-F` options are given. + +A commit object may have any number of parents. With exactly one +parent, it is an ordinary commit. Having more than one parent makes +the commit a merge between several lines of history. Initial (root) +commits have no parents. + +While a tree represents a particular directory state of a working +directory, a commit represents that state in "time", and explains how +to get there. + +Normally a commit would identify a new "HEAD" state, and while Git +doesn't care where you save the note about that state, in practice we +tend to just write the result to the file that is pointed at by +`.git/HEAD`, so that we can always see what the last committed +state was. + +OPTIONS +------- +<tree>:: + An existing tree object + +-p <parent>:: + Each '-p' indicates the id of a parent commit object. + +-m <message>:: + A paragraph in the commit log message. This can be given more than + once and each <message> becomes its own paragraph. + +-F <file>:: + Read the commit log message from the given file. Use `-` to read + from the standard input. + +-S[<keyid>]:: +--gpg-sign[=<keyid>]:: + GPG-sign commits. The `keyid` argument is optional and + defaults to the committer identity; if specified, it must be + stuck to the option without a space. + +--no-gpg-sign:: + Countermand `commit.gpgSign` configuration variable that is + set to force each and every commit to be signed. + + +Commit Information +------------------ + +A commit encapsulates: + +- all parent object ids +- author name, email and date +- committer name and email and the commit time. + +While parent object ids are provided on the command line, author and +committer information is taken from the following environment variables, +if set: + + GIT_AUTHOR_NAME + GIT_AUTHOR_EMAIL + GIT_AUTHOR_DATE + GIT_COMMITTER_NAME + GIT_COMMITTER_EMAIL + GIT_COMMITTER_DATE + +(nb "<", ">" and "\n"s are stripped) + +In case (some of) these environment variables are not set, the information +is taken from the configuration items user.name and user.email, or, if not +present, the environment variable EMAIL, or, if that is not set, +system user name and the hostname used for outgoing mail (taken +from `/etc/mailname` and falling back to the fully qualified hostname when +that file does not exist). + +A commit comment is read from stdin. If a changelog +entry is not provided via "<" redirection, 'git commit-tree' will just wait +for one to be entered and terminated with ^D. + +include::date-formats.txt[] + +Discussion +---------- + +include::i18n.txt[] + +FILES +----- +/etc/mailname + +SEE ALSO +-------- +linkgit:git-write-tree[1] + +GIT +--- +Part of the linkgit:git[1] suite diff --git a/Documentation/git-commit.txt b/Documentation/git-commit.txt new file mode 100644 index 0000000..9ec6b3c --- /dev/null +++ b/Documentation/git-commit.txt @@ -0,0 +1,482 @@ +git-commit(1) +============= + +NAME +---- +git-commit - Record changes to the repository + +SYNOPSIS +-------- +[verse] +'git commit' [-a | --interactive | --patch] [-s] [-v] [-u<mode>] [--amend] + [--dry-run] [(-c | -C | --fixup | --squash) <commit>] + [-F <file> | -m <msg>] [--reset-author] [--allow-empty] + [--allow-empty-message] [--no-verify] [-e] [--author=<author>] + [--date=<date>] [--cleanup=<mode>] [--[no-]status] + [-i | -o] [-S[<keyid>]] [--] [<file>...] + +DESCRIPTION +----------- +Stores the current contents of the index in a new commit along +with a log message from the user describing the changes. + +The content to be added can be specified in several ways: + +1. by using 'git add' to incrementally "add" changes to the + index before using the 'commit' command (Note: even modified + files must be "added"); + +2. by using 'git rm' to remove files from the working tree + and the index, again before using the 'commit' command; + +3. by listing files as arguments to the 'commit' command, in which + case the commit will ignore changes staged in the index, and instead + record the current content of the listed files (which must already + be known to Git); + +4. by using the -a switch with the 'commit' command to automatically + "add" changes from all known files (i.e. all files that are already + listed in the index) and to automatically "rm" files in the index + that have been removed from the working tree, and then perform the + actual commit; + +5. by using the --interactive or --patch switches with the 'commit' command + to decide one by one which files or hunks should be part of the commit, + before finalizing the operation. See the ``Interactive Mode'' section of + linkgit:git-add[1] to learn how to operate these modes. + +The `--dry-run` option can be used to obtain a +summary of what is included by any of the above for the next +commit by giving the same set of parameters (options and paths). + +If you make a commit and then find a mistake immediately after +that, you can recover from it with 'git reset'. + + +OPTIONS +------- +-a:: +--all:: + Tell the command to automatically stage files that have + been modified and deleted, but new files you have not + told Git about are not affected. + +-p:: +--patch:: + Use the interactive patch selection interface to chose + which changes to commit. See linkgit:git-add[1] for + details. + +-C <commit>:: +--reuse-message=<commit>:: + Take an existing commit object, and reuse the log message + and the authorship information (including the timestamp) + when creating the commit. + +-c <commit>:: +--reedit-message=<commit>:: + Like '-C', but with '-c' the editor is invoked, so that + the user can further edit the commit message. + +--fixup=<commit>:: + Construct a commit message for use with `rebase --autosquash`. + The commit message will be the subject line from the specified + commit with a prefix of "fixup! ". See linkgit:git-rebase[1] + for details. + +--squash=<commit>:: + Construct a commit message for use with `rebase --autosquash`. + The commit message subject line is taken from the specified + commit with a prefix of "squash! ". Can be used with additional + commit message options (`-m`/`-c`/`-C`/`-F`). See + linkgit:git-rebase[1] for details. + +--reset-author:: + When used with -C/-c/--amend options, or when committing after a + a conflicting cherry-pick, declare that the authorship of the + resulting commit now belongs to the committer. This also renews + the author timestamp. + +--short:: + When doing a dry-run, give the output in the short-format. See + linkgit:git-status[1] for details. Implies `--dry-run`. + +--branch:: + Show the branch and tracking info even in short-format. + +--porcelain:: + When doing a dry-run, give the output in a porcelain-ready + format. See linkgit:git-status[1] for details. Implies + `--dry-run`. + +--long:: + When doing a dry-run, give the output in a the long-format. + Implies `--dry-run`. + +-z:: +--null:: + When showing `short` or `porcelain` status output, terminate + entries in the status output with NUL, instead of LF. If no + format is given, implies the `--porcelain` output format. + +-F <file>:: +--file=<file>:: + Take the commit message from the given file. Use '-' to + read the message from the standard input. + +--author=<author>:: + Override the commit author. Specify an explicit author using the + standard `A U Thor <author@example.com>` format. Otherwise <author> + is assumed to be a pattern and is used to search for an existing + commit by that author (i.e. rev-list --all -i --author=<author>); + the commit author is then copied from the first such commit found. + +--date=<date>:: + Override the author date used in the commit. + +-m <msg>:: +--message=<msg>:: + Use the given <msg> as the commit message. + If multiple `-m` options are given, their values are + concatenated as separate paragraphs. + +-t <file>:: +--template=<file>:: + When editing the commit message, start the editor with the + contents in the given file. The `commit.template` configuration + variable is often used to give this option implicitly to the + command. This mechanism can be used by projects that want to + guide participants with some hints on what to write in the message + in what order. If the user exits the editor without editing the + message, the commit is aborted. This has no effect when a message + is given by other means, e.g. with the `-m` or `-F` options. + +-s:: +--signoff:: + Add Signed-off-by line by the committer at the end of the commit + log message. The meaning of a signoff depends on the project, + but it typically certifies that committer has + the rights to submit this work under the same license and + agrees to a Developer Certificate of Origin + (see http://developercertificate.org/ for more information). + +-n:: +--no-verify:: + This option bypasses the pre-commit and commit-msg hooks. + See also linkgit:githooks[5]. + +--allow-empty:: + Usually recording a commit that has the exact same tree as its + sole parent commit is a mistake, and the command prevents you + from making such a commit. This option bypasses the safety, and + is primarily for use by foreign SCM interface scripts. + +--allow-empty-message:: + Like --allow-empty this command is primarily for use by foreign + SCM interface scripts. It allows you to create a commit with an + empty commit message without using plumbing commands like + linkgit:git-commit-tree[1]. + +--cleanup=<mode>:: + This option determines how the supplied commit message should be + cleaned up before committing. The '<mode>' can be `strip`, + `whitespace`, `verbatim`, `scissors` or `default`. ++ +-- +strip:: + Strip leading and trailing empty lines, trailing whitespace, + commentary and collapse consecutive empty lines. +whitespace:: + Same as `strip` except #commentary is not removed. +verbatim:: + Do not change the message at all. +scissors:: + Same as `whitespace`, except that everything from (and + including) the line + "`# ------------------------ >8 ------------------------`" + is truncated if the message is to be edited. "`#`" can be + customized with core.commentChar. +default:: + Same as `strip` if the message is to be edited. + Otherwise `whitespace`. +-- ++ +The default can be changed by the 'commit.cleanup' configuration +variable (see linkgit:git-config[1]). + +-e:: +--edit:: + The message taken from file with `-F`, command line with + `-m`, and from commit object with `-C` are usually used as + the commit log message unmodified. This option lets you + further edit the message taken from these sources. + +--no-edit:: + Use the selected commit message without launching an editor. + For example, `git commit --amend --no-edit` amends a commit + without changing its commit message. + +--amend:: + Replace the tip of the current branch by creating a new + commit. The recorded tree is prepared as usual (including + the effect of the `-i` and `-o` options and explicit + pathspec), and the message from the original commit is used + as the starting point, instead of an empty message, when no + other message is specified from the command line via options + such as `-m`, `-F`, `-c`, etc. The new commit has the same + parents and author as the current one (the `--reset-author` + option can countermand this). ++ +-- +It is a rough equivalent for: +------ + $ git reset --soft HEAD^ + $ ... do something else to come up with the right tree ... + $ git commit -c ORIG_HEAD + +------ +but can be used to amend a merge commit. +-- ++ +You should understand the implications of rewriting history if you +amend a commit that has already been published. (See the "RECOVERING +FROM UPSTREAM REBASE" section in linkgit:git-rebase[1].) + +--no-post-rewrite:: + Bypass the post-rewrite hook. + +-i:: +--include:: + Before making a commit out of staged contents so far, + stage the contents of paths given on the command line + as well. This is usually not what you want unless you + are concluding a conflicted merge. + +-o:: +--only:: + Make a commit by taking the updated working tree contents + of the paths specified on the + command line, disregarding any contents that have been + staged for other paths. This is the default mode of operation of + 'git commit' if any paths are given on the command line, + in which case this option can be omitted. + If this option is specified together with '--amend', then + no paths need to be specified, which can be used to amend + the last commit without committing changes that have + already been staged. + +-u[<mode>]:: +--untracked-files[=<mode>]:: + Show untracked files. ++ +The mode parameter is optional (defaults to 'all'), and is used to +specify the handling of untracked files; when -u is not used, the +default is 'normal', i.e. show untracked files and directories. ++ +The possible options are: ++ + - 'no' - Show no untracked files + - 'normal' - Shows untracked files and directories + - 'all' - Also shows individual files in untracked directories. ++ +The default can be changed using the status.showUntrackedFiles +configuration variable documented in linkgit:git-config[1]. + +-v:: +--verbose:: + Show unified diff between the HEAD commit and what + would be committed at the bottom of the commit message + template to help the user describe the commit by reminding + what changes the commit has. + Note that this diff output doesn't have its + lines prefixed with '#'. This diff will not be a part + of the commit message. ++ +If specified twice, show in addition the unified diff between +what would be committed and the worktree files, i.e. the unstaged +changes to tracked files. + +-q:: +--quiet:: + Suppress commit summary message. + +--dry-run:: + Do not create a commit, but show a list of paths that are + to be committed, paths with local changes that will be left + uncommitted and paths that are untracked. + +--status:: + Include the output of linkgit:git-status[1] in the commit + message template when using an editor to prepare the commit + message. Defaults to on, but can be used to override + configuration variable commit.status. + +--no-status:: + Do not include the output of linkgit:git-status[1] in the + commit message template when using an editor to prepare the + default commit message. + +-S[<keyid>]:: +--gpg-sign[=<keyid>]:: + GPG-sign commits. The `keyid` argument is optional and + defaults to the committer identity; if specified, it must be + stuck to the option without a space. + +--no-gpg-sign:: + Countermand `commit.gpgSign` configuration variable that is + set to force each and every commit to be signed. + +\--:: + Do not interpret any more arguments as options. + +<file>...:: + When files are given on the command line, the command + commits the contents of the named files, without + recording the changes already staged. The contents of + these files are also staged for the next commit on top + of what have been staged before. + +:git-commit: 1 +include::date-formats.txt[] + +EXAMPLES +-------- +When recording your own work, the contents of modified files in +your working tree are temporarily stored to a staging area +called the "index" with 'git add'. A file can be +reverted back, only in the index but not in the working tree, +to that of the last commit with `git reset HEAD -- <file>`, +which effectively reverts 'git add' and prevents the changes to +this file from participating in the next commit. After building +the state to be committed incrementally with these commands, +`git commit` (without any pathname parameter) is used to record what +has been staged so far. This is the most basic form of the +command. An example: + +------------ +$ edit hello.c +$ git rm goodbye.c +$ git add hello.c +$ git commit +------------ + +Instead of staging files after each individual change, you can +tell `git commit` to notice the changes to the files whose +contents are tracked in +your working tree and do corresponding `git add` and `git rm` +for you. That is, this example does the same as the earlier +example if there is no other change in your working tree: + +------------ +$ edit hello.c +$ rm goodbye.c +$ git commit -a +------------ + +The command `git commit -a` first looks at your working tree, +notices that you have modified hello.c and removed goodbye.c, +and performs necessary `git add` and `git rm` for you. + +After staging changes to many files, you can alter the order the +changes are recorded in, by giving pathnames to `git commit`. +When pathnames are given, the command makes a commit that +only records the changes made to the named paths: + +------------ +$ edit hello.c hello.h +$ git add hello.c hello.h +$ edit Makefile +$ git commit Makefile +------------ + +This makes a commit that records the modification to `Makefile`. +The changes staged for `hello.c` and `hello.h` are not included +in the resulting commit. However, their changes are not lost -- +they are still staged and merely held back. After the above +sequence, if you do: + +------------ +$ git commit +------------ + +this second commit would record the changes to `hello.c` and +`hello.h` as expected. + +After a merge (initiated by 'git merge' or 'git pull') stops +because of conflicts, cleanly merged +paths are already staged to be committed for you, and paths that +conflicted are left in unmerged state. You would have to first +check which paths are conflicting with 'git status' +and after fixing them manually in your working tree, you would +stage the result as usual with 'git add': + +------------ +$ git status | grep unmerged +unmerged: hello.c +$ edit hello.c +$ git add hello.c +------------ + +After resolving conflicts and staging the result, `git ls-files -u` +would stop mentioning the conflicted path. When you are done, +run `git commit` to finally record the merge: + +------------ +$ git commit +------------ + +As with the case to record your own changes, you can use `-a` +option to save typing. One difference is that during a merge +resolution, you cannot use `git commit` with pathnames to +alter the order the changes are committed, because the merge +should be recorded as a single commit. In fact, the command +refuses to run when given pathnames (but see `-i` option). + + +DISCUSSION +---------- + +Though not required, it's a good idea to begin the commit message +with a single short (less than 50 character) line summarizing the +change, followed by a blank line and then a more thorough description. +The text up to the first blank line in a commit message is treated +as the commit title, and that title is used throughout Git. +For example, linkgit:git-format-patch[1] turns a commit into email, and it uses +the title on the Subject line and the rest of the commit in the body. + +include::i18n.txt[] + +ENVIRONMENT AND CONFIGURATION VARIABLES +--------------------------------------- +The editor used to edit the commit log message will be chosen from the +GIT_EDITOR environment variable, the core.editor configuration variable, the +VISUAL environment variable, or the EDITOR environment variable (in that +order). See linkgit:git-var[1] for details. + +HOOKS +----- +This command can run `commit-msg`, `prepare-commit-msg`, `pre-commit`, +and `post-commit` hooks. See linkgit:githooks[5] for more +information. + +FILES +----- + +`$GIT_DIR/COMMIT_EDITMSG`:: + This file contains the commit message of a commit in progress. + If `git commit` exits due to an error before creating a commit, + any commit message that has been provided by the user (e.g., in + an editor session) will be available in this file, but will be + overwritten by the next invocation of `git commit`. + +SEE ALSO +-------- +linkgit:git-add[1], +linkgit:git-rm[1], +linkgit:git-mv[1], +linkgit:git-merge[1], +linkgit:git-commit-tree[1] + +GIT +--- +Part of the linkgit:git[1] suite diff --git a/Documentation/git-config.txt b/Documentation/git-config.txt new file mode 100644 index 0000000..6843114 --- /dev/null +++ b/Documentation/git-config.txt @@ -0,0 +1,427 @@ +git-config(1) +============= + +NAME +---- +git-config - Get and set repository or global options + + +SYNOPSIS +-------- +[verse] +'git config' [<file-option>] [type] [--show-origin] [-z|--null] name [value [value_regex]] +'git config' [<file-option>] [type] --add name value +'git config' [<file-option>] [type] --replace-all name value [value_regex] +'git config' [<file-option>] [type] [--show-origin] [-z|--null] --get name [value_regex] +'git config' [<file-option>] [type] [--show-origin] [-z|--null] --get-all name [value_regex] +'git config' [<file-option>] [type] [--show-origin] [-z|--null] [--name-only] --get-regexp name_regex [value_regex] +'git config' [<file-option>] [type] [-z|--null] --get-urlmatch name URL +'git config' [<file-option>] --unset name [value_regex] +'git config' [<file-option>] --unset-all name [value_regex] +'git config' [<file-option>] --rename-section old_name new_name +'git config' [<file-option>] --remove-section name +'git config' [<file-option>] [--show-origin] [-z|--null] [--name-only] -l | --list +'git config' [<file-option>] --get-color name [default] +'git config' [<file-option>] --get-colorbool name [stdout-is-tty] +'git config' [<file-option>] -e | --edit + +DESCRIPTION +----------- +You can query/set/replace/unset options with this command. The name is +actually the section and the key separated by a dot, and the value will be +escaped. + +Multiple lines can be added to an option by using the '--add' option. +If you want to update or unset an option which can occur on multiple +lines, a POSIX regexp `value_regex` needs to be given. Only the +existing values that match the regexp are updated or unset. If +you want to handle the lines that do *not* match the regex, just +prepend a single exclamation mark in front (see also <<EXAMPLES>>). + +The type specifier can be either '--int' or '--bool', to make +'git config' ensure that the variable(s) are of the given type and +convert the value to the canonical form (simple decimal number for int, +a "true" or "false" string for bool), or '--path', which does some +path expansion (see '--path' below). If no type specifier is passed, no +checks or transformations are performed on the value. + +When reading, the values are read from the system, global and +repository local configuration files by default, and options +'--system', '--global', '--local' and '--file <filename>' can be +used to tell the command to read from only that location (see <<FILES>>). + +When writing, the new value is written to the repository local +configuration file by default, and options '--system', '--global', +'--file <filename>' can be used to tell the command to write to +that location (you can say '--local' but that is the default). + +This command will fail with non-zero status upon error. Some exit +codes are: + +- The section or key is invalid (ret=1), +- no section or name was provided (ret=2), +- the config file is invalid (ret=3), +- the config file cannot be written (ret=4), +- you try to unset an option which does not exist (ret=5), +- you try to unset/set an option for which multiple lines match (ret=5), or +- you try to use an invalid regexp (ret=6). + +On success, the command returns the exit code 0. + +OPTIONS +------- + +--replace-all:: + Default behavior is to replace at most one line. This replaces + all lines matching the key (and optionally the value_regex). + +--add:: + Adds a new line to the option without altering any existing + values. This is the same as providing '^$' as the value_regex + in `--replace-all`. + +--get:: + Get the value for a given key (optionally filtered by a regex + matching the value). Returns error code 1 if the key was not + found and the last value if multiple key values were found. + +--get-all:: + Like get, but returns all values for a multi-valued key. + +--get-regexp:: + Like --get-all, but interprets the name as a regular expression and + writes out the key names. Regular expression matching is currently + case-sensitive and done against a canonicalized version of the key + in which section and variable names are lowercased, but subsection + names are not. + +--get-urlmatch name URL:: + When given a two-part name section.key, the value for + section.<url>.key whose <url> part matches the best to the + given URL is returned (if no such key exists, the value for + section.key is used as a fallback). When given just the + section as name, do so for all the keys in the section and + list them. Returns error code 1 if no value is found. + +--global:: + For writing options: write to global `~/.gitconfig` file + rather than the repository `.git/config`, write to + `$XDG_CONFIG_HOME/git/config` file if this file exists and the + `~/.gitconfig` file doesn't. ++ +For reading options: read only from global `~/.gitconfig` and from +`$XDG_CONFIG_HOME/git/config` rather than from all available files. ++ +See also <<FILES>>. + +--system:: + For writing options: write to system-wide + `$(prefix)/etc/gitconfig` rather than the repository + `.git/config`. ++ +For reading options: read only from system-wide `$(prefix)/etc/gitconfig` +rather than from all available files. ++ +See also <<FILES>>. + +--local:: + For writing options: write to the repository `.git/config` file. + This is the default behavior. ++ +For reading options: read only from the repository `.git/config` rather than +from all available files. ++ +See also <<FILES>>. + +-f config-file:: +--file config-file:: + Use the given config file instead of the one specified by GIT_CONFIG. + +--blob blob:: + Similar to '--file' but use the given blob instead of a file. E.g. + you can use 'master:.gitmodules' to read values from the file + '.gitmodules' in the master branch. See "SPECIFYING REVISIONS" + section in linkgit:gitrevisions[7] for a more complete list of + ways to spell blob names. + +--remove-section:: + Remove the given section from the configuration file. + +--rename-section:: + Rename the given section to a new name. + +--unset:: + Remove the line matching the key from config file. + +--unset-all:: + Remove all lines matching the key from config file. + +-l:: +--list:: + List all variables set in config file, along with their values. + +--bool:: + 'git config' will ensure that the output is "true" or "false" + +--int:: + 'git config' will ensure that the output is a simple + decimal number. An optional value suffix of 'k', 'm', or 'g' + in the config file will cause the value to be multiplied + by 1024, 1048576, or 1073741824 prior to output. + +--bool-or-int:: + 'git config' will ensure that the output matches the format of + either --bool or --int, as described above. + +--path:: + 'git-config' will expand leading '{tilde}' to the value of + '$HOME', and '{tilde}user' to the home directory for the + specified user. This option has no effect when setting the + value (but you can use 'git config bla {tilde}/' from the + command line to let your shell do the expansion). + +-z:: +--null:: + For all options that output values and/or keys, always + end values with the null character (instead of a + newline). Use newline instead as a delimiter between + key and value. This allows for secure parsing of the + output without getting confused e.g. by values that + contain line breaks. + +--name-only:: + Output only the names of config variables for `--list` or + `--get-regexp`. + +--show-origin:: + Augment the output of all queried config options with the + origin type (file, standard input, blob, command line) and + the actual origin (config file path, ref, or blob id if + applicable). + +--get-colorbool name [stdout-is-tty]:: + + Find the color setting for `name` (e.g. `color.diff`) and output + "true" or "false". `stdout-is-tty` should be either "true" or + "false", and is taken into account when configuration says + "auto". If `stdout-is-tty` is missing, then checks the standard + output of the command itself, and exits with status 0 if color + is to be used, or exits with status 1 otherwise. + When the color setting for `name` is undefined, the command uses + `color.ui` as fallback. + +--get-color name [default]:: + + Find the color configured for `name` (e.g. `color.diff.new`) and + output it as the ANSI color escape sequence to the standard + output. The optional `default` parameter is used instead, if + there is no color configured for `name`. + +-e:: +--edit:: + Opens an editor to modify the specified config file; either + '--system', '--global', or repository (default). + +--[no-]includes:: + Respect `include.*` directives in config files when looking up + values. Defaults to `off` when a specific file is given (e.g., + using `--file`, `--global`, etc) and `on` when searching all + config files. + +[[FILES]] +FILES +----- + +If not set explicitly with '--file', there are four files where +'git config' will search for configuration options: + +$(prefix)/etc/gitconfig:: + System-wide configuration file. + +$XDG_CONFIG_HOME/git/config:: + Second user-specific configuration file. If $XDG_CONFIG_HOME is not set + or empty, `$HOME/.config/git/config` will be used. Any single-valued + variable set in this file will be overwritten by whatever is in + `~/.gitconfig`. It is a good idea not to create this file if + you sometimes use older versions of Git, as support for this + file was added fairly recently. + +~/.gitconfig:: + User-specific configuration file. Also called "global" + configuration file. + +$GIT_DIR/config:: + Repository specific configuration file. + +If no further options are given, all reading options will read all of these +files that are available. If the global or the system-wide configuration +file are not available they will be ignored. If the repository configuration +file is not available or readable, 'git config' will exit with a non-zero +error code. However, in neither case will an error message be issued. + +The files are read in the order given above, with last value found taking +precedence over values read earlier. When multiple values are taken then all +values of a key from all files will be used. + +All writing options will per default write to the repository specific +configuration file. Note that this also affects options like '--replace-all' +and '--unset'. *'git config' will only ever change one file at a time*. + +You can override these rules either by command-line options or by environment +variables. The '--global' and the '--system' options will limit the file used +to the global or system-wide file respectively. The GIT_CONFIG environment +variable has a similar effect, but you can specify any filename you want. + + +ENVIRONMENT +----------- + +GIT_CONFIG:: + Take the configuration from the given file instead of .git/config. + Using the "--global" option forces this to ~/.gitconfig. Using the + "--system" option forces this to $(prefix)/etc/gitconfig. + +GIT_CONFIG_NOSYSTEM:: + Whether to skip reading settings from the system-wide + $(prefix)/etc/gitconfig file. See linkgit:git[1] for details. + +See also <<FILES>>. + + +[[EXAMPLES]] +EXAMPLES +-------- + +Given a .git/config like this: + + # + # This is the config file, and + # a '#' or ';' character indicates + # a comment + # + + ; core variables + [core] + ; Don't trust file modes + filemode = false + + ; Our diff algorithm + [diff] + external = /usr/local/bin/diff-wrapper + renames = true + + ; Proxy settings + [core] + gitproxy=proxy-command for kernel.org + gitproxy=default-proxy ; for all the rest + + ; HTTP + [http] + sslVerify + [http "https://weak.example.com"] + sslVerify = false + cookieFile = /tmp/cookie.txt + +you can set the filemode to true with + +------------ +% git config core.filemode true +------------ + +The hypothetical proxy command entries actually have a postfix to discern +what URL they apply to. Here is how to change the entry for kernel.org +to "ssh". + +------------ +% git config core.gitproxy '"ssh" for kernel.org' 'for kernel.org$' +------------ + +This makes sure that only the key/value pair for kernel.org is replaced. + +To delete the entry for renames, do + +------------ +% git config --unset diff.renames +------------ + +If you want to delete an entry for a multivar (like core.gitproxy above), +you have to provide a regex matching the value of exactly one line. + +To query the value for a given key, do + +------------ +% git config --get core.filemode +------------ + +or + +------------ +% git config core.filemode +------------ + +or, to query a multivar: + +------------ +% git config --get core.gitproxy "for kernel.org$" +------------ + +If you want to know all the values for a multivar, do: + +------------ +% git config --get-all core.gitproxy +------------ + +If you like to live dangerously, you can replace *all* core.gitproxy by a +new one with + +------------ +% git config --replace-all core.gitproxy ssh +------------ + +However, if you really only want to replace the line for the default proxy, +i.e. the one without a "for ..." postfix, do something like this: + +------------ +% git config core.gitproxy ssh '! for ' +------------ + +To actually match only values with an exclamation mark, you have to + +------------ +% git config section.key value '[!]' +------------ + +To add a new proxy, without altering any of the existing ones, use + +------------ +% git config --add core.gitproxy '"proxy-command" for example.com' +------------ + +An example to use customized color from the configuration in your +script: + +------------ +#!/bin/sh +WS=$(git config --get-color color.diff.whitespace "blue reverse") +RESET=$(git config --get-color "" "reset") +echo "${WS}your whitespace color or blue reverse${RESET}" +------------ + +For URLs in `https://weak.example.com`, `http.sslVerify` is set to +false, while it is set to `true` for all others: + +------------ +% git config --bool --get-urlmatch http.sslverify https://good.example.com +true +% git config --bool --get-urlmatch http.sslverify https://weak.example.com +false +% git config --get-urlmatch http https://weak.example.com +http.cookieFile /tmp/cookie.txt +http.sslverify false +------------ + +include::config.txt[] + +GIT +--- +Part of the linkgit:git[1] suite diff --git a/Documentation/git-count-objects.txt b/Documentation/git-count-objects.txt new file mode 100644 index 0000000..2ff3568 --- /dev/null +++ b/Documentation/git-count-objects.txt @@ -0,0 +1,49 @@ +git-count-objects(1) +==================== + +NAME +---- +git-count-objects - Count unpacked number of objects and their disk consumption + +SYNOPSIS +-------- +[verse] +'git count-objects' [-v] [-H | --human-readable] + +DESCRIPTION +----------- +This counts the number of unpacked object files and disk space consumed by +them, to help you decide when it is a good time to repack. + + +OPTIONS +------- +-v:: +--verbose:: + Report in more detail: ++ +count: the number of loose objects ++ +size: disk space consumed by loose objects, in KiB (unless -H is specified) ++ +in-pack: the number of in-pack objects ++ +size-pack: disk space consumed by the packs, in KiB (unless -H is specified) ++ +prune-packable: the number of loose objects that are also present in +the packs. These objects could be pruned using `git prune-packed`. ++ +garbage: the number of files in object database that are neither valid loose +objects nor valid packs ++ +size-garbage: disk space consumed by garbage files, in KiB (unless -H is +specified) + +-H:: +--human-readable:: + +Print sizes in human readable format + +GIT +--- +Part of the linkgit:git[1] suite diff --git a/Documentation/git-credential-cache--daemon.txt b/Documentation/git-credential-cache--daemon.txt new file mode 100644 index 0000000..7051c6b --- /dev/null +++ b/Documentation/git-credential-cache--daemon.txt @@ -0,0 +1,30 @@ +git-credential-cache--daemon(1) +=============================== + +NAME +---- +git-credential-cache--daemon - Temporarily store user credentials in memory + +SYNOPSIS +-------- +[verse] +git credential-cache--daemon [--debug] <socket> + +DESCRIPTION +----------- + +NOTE: You probably don't want to invoke this command yourself; it is +started automatically when you use linkgit:git-credential-cache[1]. + +This command listens on the Unix domain socket specified by `<socket>` +for `git-credential-cache` clients. Clients may store and retrieve +credentials. Each credential is held for a timeout specified by the +client; once no credentials are held, the daemon exits. + +If the `--debug` option is specified, the daemon does not close its +stderr stream, and may output extra diagnostics to it even after it has +begun listening for clients. + +GIT +--- +Part of the linkgit:git[1] suite diff --git a/Documentation/git-credential-cache.txt b/Documentation/git-credential-cache.txt new file mode 100644 index 0000000..96208f8 --- /dev/null +++ b/Documentation/git-credential-cache.txt @@ -0,0 +1,77 @@ +git-credential-cache(1) +======================= + +NAME +---- +git-credential-cache - Helper to temporarily store passwords in memory + +SYNOPSIS +-------- +----------------------------- +git config credential.helper 'cache [options]' +----------------------------- + +DESCRIPTION +----------- + +This command caches credentials in memory for use by future Git +programs. The stored credentials never touch the disk, and are forgotten +after a configurable timeout. The cache is accessible over a Unix +domain socket, restricted to the current user by filesystem permissions. + +You probably don't want to invoke this command directly; it is meant to +be used as a credential helper by other parts of Git. See +linkgit:gitcredentials[7] or `EXAMPLES` below. + +OPTIONS +------- + +--timeout <seconds>:: + + Number of seconds to cache credentials (default: 900). + +--socket <path>:: + + Use `<path>` to contact a running cache daemon (or start a new + cache daemon if one is not started). Defaults to + `~/.git-credential-cache/socket`. If your home directory is on a + network-mounted filesystem, you may need to change this to a + local filesystem. You must specify an absolute path. + +CONTROLLING THE DAEMON +---------------------- + +If you would like the daemon to exit early, forgetting all cached +credentials before their timeout, you can issue an `exit` action: + +-------------------------------------- +git credential-cache exit +-------------------------------------- + +EXAMPLES +-------- + +The point of this helper is to reduce the number of times you must type +your username or password. For example: + +------------------------------------ +$ git config credential.helper cache +$ git push http://example.com/repo.git +Username: <type your username> +Password: <type your password> + +[work for 5 more minutes] +$ git push http://example.com/repo.git +[your credentials are used automatically] +------------------------------------ + +You can provide options via the credential.helper configuration +variable (this example drops the cache time to 5 minutes): + +------------------------------------------------------- +$ git config credential.helper 'cache --timeout=300' +------------------------------------------------------- + +GIT +--- +Part of the linkgit:git[1] suite diff --git a/Documentation/git-credential-store.txt b/Documentation/git-credential-store.txt new file mode 100644 index 0000000..e3c8f27 --- /dev/null +++ b/Documentation/git-credential-store.txt @@ -0,0 +1,106 @@ +git-credential-store(1) +======================= + +NAME +---- +git-credential-store - Helper to store credentials on disk + +SYNOPSIS +-------- +------------------- +git config credential.helper 'store [options]' +------------------- + +DESCRIPTION +----------- + +NOTE: Using this helper will store your passwords unencrypted on disk, +protected only by filesystem permissions. If this is not an acceptable +security tradeoff, try linkgit:git-credential-cache[1], or find a helper +that integrates with secure storage provided by your operating system. + +This command stores credentials indefinitely on disk for use by future +Git programs. + +You probably don't want to invoke this command directly; it is meant to +be used as a credential helper by other parts of git. See +linkgit:gitcredentials[7] or `EXAMPLES` below. + +OPTIONS +------- + +--file=<path>:: + + Use `<path>` to lookup and store credentials. The file will have its + filesystem permissions set to prevent other users on the system + from reading it, but will not be encrypted or otherwise + protected. If not specified, credentials will be searched for from + `~/.git-credentials` and `$XDG_CONFIG_HOME/git/credentials`, and + credentials will be written to `~/.git-credentials` if it exists, or + `$XDG_CONFIG_HOME/git/credentials` if it exists and the former does + not. See also <<FILES>>. + +[[FILES]] +FILES +----- + +If not set explicitly with '--file', there are two files where +git-credential-store will search for credentials in order of precedence: + +~/.git-credentials:: + User-specific credentials file. + +$XDG_CONFIG_HOME/git/credentials:: + Second user-specific credentials file. If '$XDG_CONFIG_HOME' is not set + or empty, `$HOME/.config/git/credentials` will be used. Any credentials + stored in this file will not be used if `~/.git-credentials` has a + matching credential as well. It is a good idea not to create this file + if you sometimes use older versions of Git that do not support it. + +For credential lookups, the files are read in the order given above, with the +first matching credential found taking precedence over credentials found in +files further down the list. + +Credential storage will by default write to the first existing file in the +list. If none of these files exist, `~/.git-credentials` will be created and +written to. + +When erasing credentials, matching credentials will be erased from all files. + +EXAMPLES +-------- + +The point of this helper is to reduce the number of times you must type +your username or password. For example: + +------------------------------------------ +$ git config credential.helper store +$ git push http://example.com/repo.git +Username: <type your username> +Password: <type your password> + +[several days later] +$ git push http://example.com/repo.git +[your credentials are used automatically] +------------------------------------------ + +STORAGE FORMAT +-------------- + +The `.git-credentials` file is stored in plaintext. Each credential is +stored on its own line as a URL like: + +------------------------------ +https://user:pass@example.com +------------------------------ + +When Git needs authentication for a particular URL context, +credential-store will consider that context a pattern to match against +each entry in the credentials file. If the protocol, hostname, and +username (if we already have one) match, then the password is returned +to Git. See the discussion of configuration in linkgit:gitcredentials[7] +for more information. + +GIT +--- +Part of the linkgit:git[1] suite diff --git a/Documentation/git-credential.txt b/Documentation/git-credential.txt new file mode 100644 index 0000000..b211440 --- /dev/null +++ b/Documentation/git-credential.txt @@ -0,0 +1,154 @@ +git-credential(1) +================= + +NAME +---- +git-credential - Retrieve and store user credentials + +SYNOPSIS +-------- +------------------ +git credential <fill|approve|reject> +------------------ + +DESCRIPTION +----------- + +Git has an internal interface for storing and retrieving credentials +from system-specific helpers, as well as prompting the user for +usernames and passwords. The git-credential command exposes this +interface to scripts which may want to retrieve, store, or prompt for +credentials in the same manner as Git. The design of this scriptable +interface models the internal C API; see +link:technical/api-credentials.html[the Git credential API] for more +background on the concepts. + +git-credential takes an "action" option on the command-line (one of +`fill`, `approve`, or `reject`) and reads a credential description +on stdin (see <<IOFMT,INPUT/OUTPUT FORMAT>>). + +If the action is `fill`, git-credential will attempt to add "username" +and "password" attributes to the description by reading config files, +by contacting any configured credential helpers, or by prompting the +user. The username and password attributes of the credential +description are then printed to stdout together with the attributes +already provided. + +If the action is `approve`, git-credential will send the description +to any configured credential helpers, which may store the credential +for later use. + +If the action is `reject`, git-credential will send the description to +any configured credential helpers, which may erase any stored +credential matching the description. + +If the action is `approve` or `reject`, no output should be emitted. + +TYPICAL USE OF GIT CREDENTIAL +----------------------------- + +An application using git-credential will typically use `git +credential` following these steps: + + 1. Generate a credential description based on the context. ++ +For example, if we want a password for +`https://example.com/foo.git`, we might generate the following +credential description (don't forget the blank line at the end; it +tells `git credential` that the application finished feeding all the +information it has): + + protocol=https + host=example.com + path=foo.git + + 2. Ask git-credential to give us a username and password for this + description. This is done by running `git credential fill`, + feeding the description from step (1) to its standard input. The complete + credential description (including the credential per se, i.e. the + login and password) will be produced on standard output, like: + + protocol=https + host=example.com + username=bob + password=secr3t ++ +In most cases, this means the attributes given in the input will be +repeated in the output, but Git may also modify the credential +description, for example by removing the `path` attribute when the +protocol is HTTP(s) and `credential.useHttpPath` is false. ++ +If the `git credential` knew about the password, this step may +not have involved the user actually typing this password (the +user may have typed a password to unlock the keychain instead, +or no user interaction was done if the keychain was already +unlocked) before it returned `password=secr3t`. + + 3. Use the credential (e.g., access the URL with the username and + password from step (2)), and see if it's accepted. + + 4. Report on the success or failure of the password. If the + credential allowed the operation to complete successfully, then + it can be marked with an "approve" action to tell `git + credential` to reuse it in its next invocation. If the credential + was rejected during the operation, use the "reject" action so + that `git credential` will ask for a new password in its next + invocation. In either case, `git credential` should be fed with + the credential description obtained from step (2) (which also + contain the ones provided in step (1)). + +[[IOFMT]] +INPUT/OUTPUT FORMAT +------------------- + +`git credential` reads and/or writes (depending on the action used) +credential information in its standard input/output. This information +can correspond either to keys for which `git credential` will obtain +the login/password information (e.g. host, protocol, path), or to the +actual credential data to be obtained (login/password). + +The credential is split into a set of named attributes, with one +attribute per line. Each attribute is +specified by a key-value pair, separated by an `=` (equals) sign, +followed by a newline. The key may contain any bytes except `=`, +newline, or NUL. The value may contain any bytes except newline or NUL. +In both cases, all bytes are treated as-is (i.e., there is no quoting, +and one cannot transmit a value with newline or NUL in it). The list of +attributes is terminated by a blank line or end-of-file. +Git understands the following attributes: + +`protocol`:: + + The protocol over which the credential will be used (e.g., + `https`). + +`host`:: + + The remote hostname for a network credential. + +`path`:: + + The path with which the credential will be used. E.g., for + accessing a remote https repository, this will be the + repository's path on the server. + +`username`:: + + The credential's username, if we already have one (e.g., from a + URL, from the user, or from a previously run helper). + +`password`:: + + The credential's password, if we are asking it to be stored. + +`url`:: + + When this special attribute is read by `git credential`, the + value is parsed as a URL and treated as if its constituent parts + were read (e.g., `url=https://example.com` would behave as if + `protocol=https` and `host=example.com` had been provided). This + can help callers avoid parsing URLs themselves. Note that any + components which are missing from the URL (e.g., there is no + username in the example above) will be set to empty; if you want + to provide a URL and override some attributes, provide the URL + attribute first, followed by any overrides. diff --git a/Documentation/git-cvsexportcommit.txt b/Documentation/git-cvsexportcommit.txt new file mode 100644 index 0000000..00154b6 --- /dev/null +++ b/Documentation/git-cvsexportcommit.txt @@ -0,0 +1,118 @@ +git-cvsexportcommit(1) +====================== + +NAME +---- +git-cvsexportcommit - Export a single commit to a CVS checkout + + +SYNOPSIS +-------- +[verse] +'git cvsexportcommit' [-h] [-u] [-v] [-c] [-P] [-p] [-a] [-d cvsroot] + [-w cvsworkdir] [-W] [-f] [-m msgprefix] [PARENTCOMMIT] COMMITID + + +DESCRIPTION +----------- +Exports a commit from Git to a CVS checkout, making it easier +to merge patches from a Git repository into a CVS repository. + +Specify the name of a CVS checkout using the -w switch or execute it +from the root of the CVS working copy. In the latter case GIT_DIR must +be defined. See examples below. + +It does its best to do the safe thing, it will check that the files are +unchanged and up to date in the CVS checkout, and it will not autocommit +by default. + +Supports file additions, removals, and commits that affect binary files. + +If the commit is a merge commit, you must tell 'git cvsexportcommit' what +parent the changeset should be done against. + +OPTIONS +------- + +-c:: + Commit automatically if the patch applied cleanly. It will not + commit if any hunks fail to apply or there were other problems. + +-p:: + Be pedantic (paranoid) when applying patches. Invokes patch with + --fuzz=0 + +-a:: + Add authorship information. Adds Author line, and Committer (if + different from Author) to the message. + +-d:: + Set an alternative CVSROOT to use. This corresponds to the CVS + -d parameter. Usually users will not want to set this, except + if using CVS in an asymmetric fashion. + +-f:: + Force the merge even if the files are not up to date. + +-P:: + Force the parent commit, even if it is not a direct parent. + +-m:: + Prepend the commit message with the provided prefix. + Useful for patch series and the like. + +-u:: + Update affected files from CVS repository before attempting export. + +-k:: + Reverse CVS keyword expansion (e.g. $Revision: 1.2.3.4$ + becomes $Revision$) in working CVS checkout before applying patch. + +-w:: + Specify the location of the CVS checkout to use for the export. This + option does not require GIT_DIR to be set before execution if the + current directory is within a Git repository. The default is the + value of 'cvsexportcommit.cvsdir'. + +-W:: + Tell cvsexportcommit that the current working directory is not only + a Git checkout, but also the CVS checkout. Therefore, Git will + reset the working directory to the parent commit before proceeding. + +-v:: + Verbose. + +CONFIGURATION +------------- +cvsexportcommit.cvsdir:: + The default location of the CVS checkout to use for the export. + +EXAMPLES +-------- + +Merge one patch into CVS:: ++ +------------ +$ export GIT_DIR=~/project/.git +$ cd ~/project_cvs_checkout +$ git cvsexportcommit -v <commit-sha1> +$ cvs commit -F .msg <files> +------------ + +Merge one patch into CVS (-c and -w options). The working directory is within the Git Repo:: ++ +------------ + $ git cvsexportcommit -v -c -w ~/project_cvs_checkout <commit-sha1> +------------ + +Merge pending patches into CVS automatically -- only if you really know what you are doing:: ++ +------------ +$ export GIT_DIR=~/project/.git +$ cd ~/project_cvs_checkout +$ git cherry cvshead myhead | sed -n 's/^+ //p' | xargs -l1 git cvsexportcommit -c -p -v +------------ + +GIT +--- +Part of the linkgit:git[1] suite diff --git a/Documentation/git-cvsimport.txt b/Documentation/git-cvsimport.txt new file mode 100644 index 0000000..00a0679 --- /dev/null +++ b/Documentation/git-cvsimport.txt @@ -0,0 +1,228 @@ +git-cvsimport(1) +================ + +NAME +---- +git-cvsimport - Salvage your data out of another SCM people love to hate + + +SYNOPSIS +-------- +[verse] +'git cvsimport' [-o <branch-for-HEAD>] [-h] [-v] [-d <CVSROOT>] + [-A <author-conv-file>] [-p <options-for-cvsps>] [-P <file>] + [-C <git_repository>] [-z <fuzz>] [-i] [-k] [-u] [-s <subst>] + [-a] [-m] [-M <regex>] [-S <regex>] [-L <commitlimit>] + [-r <remote>] [-R] [<CVS_module>] + + +DESCRIPTION +----------- +*WARNING:* `git cvsimport` uses cvsps version 2, which is considered +deprecated; it does not work with cvsps version 3 and later. If you are +performing a one-shot import of a CVS repository consider using +http://cvs2svn.tigris.org/cvs2git.html[cvs2git] or +https://github.com/BartMassey/parsecvs[parsecvs]. + +Imports a CVS repository into Git. It will either create a new +repository, or incrementally import into an existing one. + +Splitting the CVS log into patch sets is done by 'cvsps'. +At least version 2.1 is required. + +*WARNING:* for certain situations the import leads to incorrect results. +Please see the section <<issues,ISSUES>> for further reference. + +You should *never* do any work of your own on the branches that are +created by 'git cvsimport'. By default initial import will create and populate a +"master" branch from the CVS repository's main branch which you're free +to work with; after that, you need to 'git merge' incremental imports, or +any CVS branches, yourself. It is advisable to specify a named remote via +-r to separate and protect the incoming branches. + +If you intend to set up a shared public repository that all developers can +read/write, or if you want to use linkgit:git-cvsserver[1], then you +probably want to make a bare clone of the imported repository, +and use the clone as the shared repository. +See linkgit:gitcvs-migration[7]. + + +OPTIONS +------- +-v:: + Verbosity: let 'cvsimport' report what it is doing. + +-d <CVSROOT>:: + The root of the CVS archive. May be local (a simple path) or remote; + currently, only the :local:, :ext: and :pserver: access methods + are supported. If not given, 'git cvsimport' will try to read it + from `CVS/Root`. If no such file exists, it checks for the + `CVSROOT` environment variable. + +<CVS_module>:: + The CVS module you want to import. Relative to <CVSROOT>. + If not given, 'git cvsimport' tries to read it from + `CVS/Repository`. + +-C <target-dir>:: + The Git repository to import to. If the directory doesn't + exist, it will be created. Default is the current directory. + +-r <remote>:: + The Git remote to import this CVS repository into. + Moves all CVS branches into remotes/<remote>/<branch> + akin to the way 'git clone' uses 'origin' by default. + +-o <branch-for-HEAD>:: + When no remote is specified (via -r) the 'HEAD' branch + from CVS is imported to the 'origin' branch within the Git + repository, as 'HEAD' already has a special meaning for Git. + When a remote is specified the 'HEAD' branch is named + remotes/<remote>/master mirroring 'git clone' behaviour. + Use this option if you want to import into a different + branch. ++ +Use '-o master' for continuing an import that was initially done by +the old cvs2git tool. + +-i:: + Import-only: don't perform a checkout after importing. This option + ensures the working directory and index remain untouched and will + not create them if they do not exist. + +-k:: + Kill keywords: will extract files with '-kk' from the CVS archive + to avoid noisy changesets. Highly recommended, but off by default + to preserve compatibility with early imported trees. + +-u:: + Convert underscores in tag and branch names to dots. + +-s <subst>:: + Substitute the character "/" in branch names with <subst> + +-p <options-for-cvsps>:: + Additional options for cvsps. + The options '-u' and '-A' are implicit and should not be used here. ++ +If you need to pass multiple options, separate them with a comma. + +-z <fuzz>:: + Pass the timestamp fuzz factor to cvsps, in seconds. If unset, + cvsps defaults to 300s. + +-P <cvsps-output-file>:: + Instead of calling cvsps, read the provided cvsps output file. Useful + for debugging or when cvsps is being handled outside cvsimport. + +-m:: + Attempt to detect merges based on the commit message. This option + will enable default regexes that try to capture the source + branch name from the commit message. + +-M <regex>:: + Attempt to detect merges based on the commit message with a custom + regex. It can be used with '-m' to enable the default regexes + as well. You must escape forward slashes. ++ +The regex must capture the source branch name in $1. ++ +This option can be used several times to provide several detection regexes. + +-S <regex>:: + Skip paths matching the regex. + +-a:: + Import all commits, including recent ones. cvsimport by default + skips commits that have a timestamp less than 10 minutes ago. + +-L <limit>:: + Limit the number of commits imported. Workaround for cases where + cvsimport leaks memory. + +-A <author-conv-file>:: + CVS by default uses the Unix username when writing its + commit logs. Using this option and an author-conv-file + maps the name recorded in CVS to author name, e-mail and + optional time zone: ++ +--------- + exon=Andreas Ericsson <ae@op5.se> + spawn=Simon Pawn <spawn@frog-pond.org> America/Chicago + +--------- ++ +'git cvsimport' will make it appear as those authors had +their GIT_AUTHOR_NAME and GIT_AUTHOR_EMAIL set properly +all along. If a time zone is specified, GIT_AUTHOR_DATE will +have the corresponding offset applied. ++ +For convenience, this data is saved to `$GIT_DIR/cvs-authors` +each time the '-A' option is provided and read from that same +file each time 'git cvsimport' is run. ++ +It is not recommended to use this feature if you intend to +export changes back to CVS again later with +'git cvsexportcommit'. + +-R:: + Generate a `$GIT_DIR/cvs-revisions` file containing a mapping from CVS + revision numbers to newly-created Git commit IDs. The generated file + will contain one line for each (filename, revision) pair imported; + each line will look like ++ +--------- +src/widget.c 1.1 1d862f173cdc7325b6fa6d2ae1cfd61fd1b512b7 +--------- ++ +The revision data is appended to the file if it already exists, for use when +doing incremental imports. ++ +This option may be useful if you have CVS revision numbers stored in commit +messages, bug-tracking systems, email archives, and the like. + +-h:: + Print a short usage message and exit. + +OUTPUT +------ +If '-v' is specified, the script reports what it is doing. + +Otherwise, success is indicated the Unix way, i.e. by simply exiting with +a zero exit status. + +[[issues]] +ISSUES +------ +Problems related to timestamps: + + * If timestamps of commits in the CVS repository are not stable enough + to be used for ordering commits changes may show up in the wrong + order. + * If any files were ever "cvs import"ed more than once (e.g., import of + more than one vendor release) the HEAD contains the wrong content. + * If the timestamp order of different files cross the revision order + within the commit matching time window the order of commits may be + wrong. + +Problems related to branches: + + * Branches on which no commits have been made are not imported. + * All files from the branching point are added to a branch even if + never added in CVS. + * This applies to files added to the source branch *after* a daughter + branch was created: if previously no commit was made on the daughter + branch they will erroneously be added to the daughter branch in git. + +Problems related to tags: + +* Multiple tags on the same revision are not imported. + +If you suspect that any of these issues may apply to the repository you +want to import, consider using cvs2git: + +* cvs2git (part of cvs2svn), `http://subversion.apache.org/` + +GIT +--- +Part of the linkgit:git[1] suite diff --git a/Documentation/git-cvsserver.txt b/Documentation/git-cvsserver.txt new file mode 100644 index 0000000..db4d7a9 --- /dev/null +++ b/Documentation/git-cvsserver.txt @@ -0,0 +1,433 @@ +git-cvsserver(1) +================ + +NAME +---- +git-cvsserver - A CVS server emulator for Git + +SYNOPSIS +-------- + +SSH: + +[verse] +export CVS_SERVER="git cvsserver" +'cvs' -d :ext:user@server/path/repo.git co <HEAD_name> + +pserver (/etc/inetd.conf): + +[verse] +cvspserver stream tcp nowait nobody /usr/bin/git-cvsserver git-cvsserver pserver + +Usage: + +[verse] +'git-cvsserver' [options] [pserver|server] [<directory> ...] + +OPTIONS +------- + +All these options obviously only make sense if enforced by the server side. +They have been implemented to resemble the linkgit:git-daemon[1] options as +closely as possible. + +--base-path <path>:: +Prepend 'path' to requested CVSROOT + +--strict-paths:: +Don't allow recursing into subdirectories + +--export-all:: +Don't check for `gitcvs.enabled` in config. You also have to specify a list +of allowed directories (see below) if you want to use this option. + +-V:: +--version:: +Print version information and exit + +-h:: +-H:: +--help:: +Print usage information and exit + +<directory>:: +You can specify a list of allowed directories. If no directories +are given, all are allowed. This is an additional restriction, gitcvs +access still needs to be enabled by the `gitcvs.enabled` config option +unless '--export-all' was given, too. + + +DESCRIPTION +----------- + +This application is a CVS emulation layer for Git. + +It is highly functional. However, not all methods are implemented, +and for those methods that are implemented, +not all switches are implemented. + +Testing has been done using both the CLI CVS client, and the Eclipse CVS +plugin. Most functionality works fine with both of these clients. + +LIMITATIONS +----------- + +CVS clients cannot tag, branch or perform Git merges. + +'git-cvsserver' maps Git branches to CVS modules. This is very different +from what most CVS users would expect since in CVS modules usually represent +one or more directories. + +INSTALLATION +------------ + +1. If you are going to offer CVS access via pserver, add a line in + /etc/inetd.conf like ++ +-- +------ + cvspserver stream tcp nowait nobody git-cvsserver pserver + +------ +Note: Some inetd servers let you specify the name of the executable +independently of the value of argv[0] (i.e. the name the program assumes +it was executed with). In this case the correct line in /etc/inetd.conf +looks like + +------ + cvspserver stream tcp nowait nobody /usr/bin/git-cvsserver git-cvsserver pserver + +------ + +Only anonymous access is provided by pserve by default. To commit you +will have to create pserver accounts, simply add a gitcvs.authdb +setting in the config file of the repositories you want the cvsserver +to allow writes to, for example: + +------ + + [gitcvs] + authdb = /etc/cvsserver/passwd + +------ +The format of these files is username followed by the encrypted password, +for example: + +------ + myuser:$1Oyx5r9mdGZ2 + myuser:$1$BA)@$vbnMJMDym7tA32AamXrm./ +------ +You can use the 'htpasswd' facility that comes with Apache to make these +files, but Apache's MD5 crypt method differs from the one used by most C +library's crypt() function, so don't use the -m option. + +Alternatively you can produce the password with perl's crypt() operator: +----- + perl -e 'my ($user, $pass) = @ARGV; printf "%s:%s\n", $user, crypt($user, $pass)' $USER password +----- + +Then provide your password via the pserver method, for example: +------ + cvs -d:pserver:someuser:somepassword <at> server/path/repo.git co <HEAD_name> +------ +No special setup is needed for SSH access, other than having Git tools +in the PATH. If you have clients that do not accept the CVS_SERVER +environment variable, you can rename 'git-cvsserver' to `cvs`. + +Note: Newer CVS versions (>= 1.12.11) also support specifying +CVS_SERVER directly in CVSROOT like + +------ +cvs -d ":ext;CVS_SERVER=git cvsserver:user@server/path/repo.git" co <HEAD_name> +------ +This has the advantage that it will be saved in your 'CVS/Root' files and +you don't need to worry about always setting the correct environment +variable. SSH users restricted to 'git-shell' don't need to override the default +with CVS_SERVER (and shouldn't) as 'git-shell' understands `cvs` to mean +'git-cvsserver' and pretends that the other end runs the real 'cvs' better. +-- +2. For each repo that you want accessible from CVS you need to edit config in + the repo and add the following section. ++ +-- +------ + [gitcvs] + enabled=1 + # optional for debugging + logFile=/path/to/logfile + +------ +Note: you need to ensure each user that is going to invoke 'git-cvsserver' has +write access to the log file and to the database (see +<<dbbackend,Database Backend>>. If you want to offer write access over +SSH, the users of course also need write access to the Git repository itself. + +You also need to ensure that each repository is "bare" (without a Git index +file) for `cvs commit` to work. See linkgit:gitcvs-migration[7]. + +[[configaccessmethod]] +All configuration variables can also be overridden for a specific method of +access. Valid method names are "ext" (for SSH access) and "pserver". The +following example configuration would disable pserver access while still +allowing access over SSH. +------ + [gitcvs] + enabled=0 + + [gitcvs "ext"] + enabled=1 +------ +-- +3. If you didn't specify the CVSROOT/CVS_SERVER directly in the checkout command, + automatically saving it in your 'CVS/Root' files, then you need to set them + explicitly in your environment. CVSROOT should be set as per normal, but the + directory should point at the appropriate Git repo. As above, for SSH clients + _not_ restricted to 'git-shell', CVS_SERVER should be set to 'git-cvsserver'. ++ +-- +------ + export CVSROOT=:ext:user@server:/var/git/project.git + export CVS_SERVER="git cvsserver" +------ +-- +4. For SSH clients that will make commits, make sure their server-side + .ssh/environment files (or .bashrc, etc., according to their specific shell) + export appropriate values for GIT_AUTHOR_NAME, GIT_AUTHOR_EMAIL, + GIT_COMMITTER_NAME, and GIT_COMMITTER_EMAIL. For SSH clients whose login + shell is bash, .bashrc may be a reasonable alternative. + +5. Clients should now be able to check out the project. Use the CVS 'module' + name to indicate what Git 'head' you want to check out. This also sets the + name of your newly checked-out directory, unless you tell it otherwise with + `-d <dir_name>`. For example, this checks out 'master' branch to the + `project-master` directory: ++ +------ + cvs co -d project-master master +------ + +[[dbbackend]] +Database Backend +---------------- + +'git-cvsserver' uses one database per Git head (i.e. CVS module) to +store information about the repository to maintain consistent +CVS revision numbers. The database needs to be +updated (i.e. written to) after every commit. + +If the commit is done directly by using `git` (as opposed to +using 'git-cvsserver') the update will need to happen on the +next repository access by 'git-cvsserver', independent of +access method and requested operation. + +That means that even if you offer only read access (e.g. by using +the pserver method), 'git-cvsserver' should have write access to +the database to work reliably (otherwise you need to make sure +that the database is up-to-date any time 'git-cvsserver' is executed). + +By default it uses SQLite databases in the Git directory, named +`gitcvs.<module_name>.sqlite`. Note that the SQLite backend creates +temporary files in the same directory as the database file on +write so it might not be enough to grant the users using +'git-cvsserver' write access to the database file without granting +them write access to the directory, too. + +The database can not be reliably regenerated in a +consistent form after the branch it is tracking has changed. +Example: For merged branches, 'git-cvsserver' only tracks +one branch of development, and after a 'git merge' an +incrementally updated database may track a different branch +than a database regenerated from scratch, causing inconsistent +CVS revision numbers. `git-cvsserver` has no way of knowing which +branch it would have picked if it had been run incrementally +pre-merge. So if you have to fully or partially (from old +backup) regenerate the database, you should be suspicious +of pre-existing CVS sandboxes. + +You can configure the database backend with the following +configuration variables: + +Configuring database backend +~~~~~~~~~~~~~~~~~~~~~~~~~~~~ + +'git-cvsserver' uses the Perl DBI module. Please also read +its documentation if changing these variables, especially +about `DBI->connect()`. + +gitcvs.dbName:: + Database name. The exact meaning depends on the + selected database driver, for SQLite this is a filename. + Supports variable substitution (see below). May + not contain semicolons (`;`). + Default: '%Ggitcvs.%m.sqlite' + +gitcvs.dbDriver:: + Used DBI driver. You can specify any available driver + for this here, but it might not work. cvsserver is tested + with 'DBD::SQLite', reported to work with + 'DBD::Pg', and reported *not* to work with 'DBD::mysql'. + Please regard this as an experimental feature. May not + contain colons (`:`). + Default: 'SQLite' + +gitcvs.dbuser:: + Database user. Only useful if setting `dbDriver`, since + SQLite has no concept of database users. Supports variable + substitution (see below). + +gitcvs.dbPass:: + Database password. Only useful if setting `dbDriver`, since + SQLite has no concept of database passwords. + +gitcvs.dbTableNamePrefix:: + Database table name prefix. Supports variable substitution + (see below). Any non-alphabetic characters will be replaced + with underscores. + +All variables can also be set per access method, see <<configaccessmethod,above>>. + +Variable substitution +^^^^^^^^^^^^^^^^^^^^^ +In `dbDriver` and `dbUser` you can use the following variables: + +%G:: + Git directory name +%g:: + Git directory name, where all characters except for + alpha-numeric ones, `.`, and `-` are replaced with + `_` (this should make it easier to use the directory + name in a filename if wanted) +%m:: + CVS module/Git head name +%a:: + access method (one of "ext" or "pserver") +%u:: + Name of the user running 'git-cvsserver'. + If no name can be determined, the + numeric uid is used. + +ENVIRONMENT +----------- + +These variables obviate the need for command-line options in some +circumstances, allowing easier restricted usage through git-shell. + +GIT_CVSSERVER_BASE_PATH takes the place of the argument to --base-path. + +GIT_CVSSERVER_ROOT specifies a single-directory whitelist. The +repository must still be configured to allow access through +git-cvsserver, as described above. + +When these environment variables are set, the corresponding +command-line arguments may not be used. + +Eclipse CVS Client Notes +------------------------ + +To get a checkout with the Eclipse CVS client: + +1. Select "Create a new project -> From CVS checkout" +2. Create a new location. See the notes below for details on how to choose the + right protocol. +3. Browse the 'modules' available. It will give you a list of the heads in + the repository. You will not be able to browse the tree from there. Only + the heads. +4. Pick 'HEAD' when it asks what branch/tag to check out. Untick the + "launch commit wizard" to avoid committing the .project file. + +Protocol notes: If you are using anonymous access via pserver, just select that. +Those using SSH access should choose the 'ext' protocol, and configure 'ext' +access on the Preferences->Team->CVS->ExtConnection pane. Set CVS_SERVER to +"`git cvsserver`". Note that password support is not good when using 'ext', +you will definitely want to have SSH keys setup. + +Alternatively, you can just use the non-standard extssh protocol that Eclipse +offer. In that case CVS_SERVER is ignored, and you will have to replace +the cvs utility on the server with 'git-cvsserver' or manipulate your `.bashrc` +so that calling 'cvs' effectively calls 'git-cvsserver'. + +Clients known to work +--------------------- + +- CVS 1.12.9 on Debian +- CVS 1.11.17 on MacOSX (from Fink package) +- Eclipse 3.0, 3.1.2 on MacOSX (see Eclipse CVS Client Notes) +- TortoiseCVS + +Operations supported +-------------------- + +All the operations required for normal use are supported, including +checkout, diff, status, update, log, add, remove, commit. + +Most CVS command arguments that read CVS tags or revision numbers +(typically -r) work, and also support any git refspec +(tag, branch, commit ID, etc). +However, CVS revision numbers for non-default branches are not well +emulated, and cvs log does not show tags or branches at +all. (Non-main-branch CVS revision numbers superficially resemble CVS +revision numbers, but they actually encode a git commit ID directly, +rather than represent the number of revisions since the branch point.) + +Note that there are two ways to checkout a particular branch. +As described elsewhere on this page, the "module" parameter +of cvs checkout is interpreted as a branch name, and it becomes +the main branch. It remains the main branch for a given sandbox +even if you temporarily make another branch sticky with +cvs update -r. Alternatively, the -r argument can indicate +some other branch to actually checkout, even though the module +is still the "main" branch. Tradeoffs (as currently +implemented): Each new "module" creates a new database on disk with +a history for the given module, and after the database is created, +operations against that main branch are fast. Or alternatively, +-r doesn't take any extra disk space, but may be significantly slower for +many operations, like cvs update. + +If you want to refer to a git refspec that has characters that are +not allowed by CVS, you have two options. First, it may just work +to supply the git refspec directly to the appropriate CVS -r argument; +some CVS clients don't seem to do much sanity checking of the argument. +Second, if that fails, you can use a special character escape mechanism +that only uses characters that are valid in CVS tags. A sequence +of 4 or 5 characters of the form (underscore (`"_"`), dash (`"-"`), +one or two characters, and dash (`"-"`)) can encode various characters based +on the one or two letters: `"s"` for slash (`"/"`), `"p"` for +period (`"."`), `"u"` for underscore (`"_"`), or two hexadecimal digits +for any byte value at all (typically an ASCII number, or perhaps a part +of a UTF-8 encoded character). + +Legacy monitoring operations are not supported (edit, watch and related). +Exports and tagging (tags and branches) are not supported at this stage. + +CRLF Line Ending Conversions +~~~~~~~~~~~~~~~~~~~~~~~~~~~~ + +By default the server leaves the '-k' mode blank for all files, +which causes the CVS client to treat them as a text files, subject +to end-of-line conversion on some platforms. + +You can make the server use the end-of-line conversion attributes to +set the '-k' modes for files by setting the `gitcvs.usecrlfattr` +config variable. See linkgit:gitattributes[5] for more information +about end-of-line conversion. + +Alternatively, if `gitcvs.usecrlfattr` config is not enabled +or the attributes do not allow automatic detection for a filename, then +the server uses the `gitcvs.allBinary` config for the default setting. +If `gitcvs.allBinary` is set, then file not otherwise +specified will default to '-kb' mode. Otherwise the '-k' mode +is left blank. But if `gitcvs.allBinary` is set to "guess", then +the correct '-k' mode will be guessed based on the contents of +the file. + +For best consistency with 'cvs', it is probably best to override the +defaults by setting `gitcvs.usecrlfattr` to true, +and `gitcvs.allBinary` to "guess". + +Dependencies +------------ +'git-cvsserver' depends on DBD::SQLite. + +GIT +--- +Part of the linkgit:git[1] suite diff --git a/Documentation/git-daemon.txt b/Documentation/git-daemon.txt new file mode 100644 index 0000000..a69b361 --- /dev/null +++ b/Documentation/git-daemon.txt @@ -0,0 +1,318 @@ +git-daemon(1) +============= + +NAME +---- +git-daemon - A really simple server for Git repositories + +SYNOPSIS +-------- +[verse] +'git daemon' [--verbose] [--syslog] [--export-all] + [--timeout=<n>] [--init-timeout=<n>] [--max-connections=<n>] + [--strict-paths] [--base-path=<path>] [--base-path-relaxed] + [--user-path | --user-path=<path>] + [--interpolated-path=<pathtemplate>] + [--reuseaddr] [--detach] [--pid-file=<file>] + [--enable=<service>] [--disable=<service>] + [--allow-override=<service>] [--forbid-override=<service>] + [--access-hook=<path>] [--[no-]informative-errors] + [--inetd | + [--listen=<host_or_ipaddr>] [--port=<n>] + [--user=<user> [--group=<group>]]] + [<directory>...] + +DESCRIPTION +----------- +A really simple TCP Git daemon that normally listens on port "DEFAULT_GIT_PORT" +aka 9418. It waits for a connection asking for a service, and will serve +that service if it is enabled. + +It verifies that the directory has the magic file "git-daemon-export-ok", and +it will refuse to export any Git directory that hasn't explicitly been marked +for export this way (unless the '--export-all' parameter is specified). If you +pass some directory paths as 'git daemon' arguments, you can further restrict +the offers to a whitelist comprising of those. + +By default, only `upload-pack` service is enabled, which serves +'git fetch-pack' and 'git ls-remote' clients, which are invoked +from 'git fetch', 'git pull', and 'git clone'. + +This is ideally suited for read-only updates, i.e., pulling from +Git repositories. + +An `upload-archive` also exists to serve 'git archive'. + +OPTIONS +------- +--strict-paths:: + Match paths exactly (i.e. don't allow "/foo/repo" when the real path is + "/foo/repo.git" or "/foo/repo/.git") and don't do user-relative paths. + 'git daemon' will refuse to start when this option is enabled and no + whitelist is specified. + +--base-path=<path>:: + Remap all the path requests as relative to the given path. + This is sort of "Git root" - if you run 'git daemon' with + '--base-path=/srv/git' on example.com, then if you later try to pull + 'git://example.com/hello.git', 'git daemon' will interpret the path + as '/srv/git/hello.git'. + +--base-path-relaxed:: + If --base-path is enabled and repo lookup fails, with this option + 'git daemon' will attempt to lookup without prefixing the base path. + This is useful for switching to --base-path usage, while still + allowing the old paths. + +--interpolated-path=<pathtemplate>:: + To support virtual hosting, an interpolated path template can be + used to dynamically construct alternate paths. The template + supports %H for the target hostname as supplied by the client but + converted to all lowercase, %CH for the canonical hostname, + %IP for the server's IP address, %P for the port number, + and %D for the absolute path of the named repository. + After interpolation, the path is validated against the directory + whitelist. + +--export-all:: + Allow pulling from all directories that look like Git repositories + (have the 'objects' and 'refs' subdirectories), even if they + do not have the 'git-daemon-export-ok' file. + +--inetd:: + Have the server run as an inetd service. Implies --syslog. + Incompatible with --detach, --port, --listen, --user and --group + options. + +--listen=<host_or_ipaddr>:: + Listen on a specific IP address or hostname. IP addresses can + be either an IPv4 address or an IPv6 address if supported. If IPv6 + is not supported, then --listen=hostname is also not supported and + --listen must be given an IPv4 address. + Can be given more than once. + Incompatible with '--inetd' option. + +--port=<n>:: + Listen on an alternative port. Incompatible with '--inetd' option. + +--init-timeout=<n>:: + Timeout (in seconds) between the moment the connection is established + and the client request is received (typically a rather low value, since + that should be basically immediate). + +--timeout=<n>:: + Timeout (in seconds) for specific client sub-requests. This includes + the time it takes for the server to process the sub-request and the + time spent waiting for the next client's request. + +--max-connections=<n>:: + Maximum number of concurrent clients, defaults to 32. Set it to + zero for no limit. + +--syslog:: + Log to syslog instead of stderr. Note that this option does not imply + --verbose, thus by default only error conditions will be logged. + +--user-path:: +--user-path=<path>:: + Allow {tilde}user notation to be used in requests. When + specified with no parameter, requests to + git://host/{tilde}alice/foo is taken as a request to access + 'foo' repository in the home directory of user `alice`. + If `--user-path=path` is specified, the same request is + taken as a request to access `path/foo` repository in + the home directory of user `alice`. + +--verbose:: + Log details about the incoming connections and requested files. + +--reuseaddr:: + Use SO_REUSEADDR when binding the listening socket. + This allows the server to restart without waiting for + old connections to time out. + +--detach:: + Detach from the shell. Implies --syslog. + +--pid-file=<file>:: + Save the process id in 'file'. Ignored when the daemon + is run under `--inetd`. + +--user=<user>:: +--group=<group>:: + Change daemon's uid and gid before entering the service loop. + When only `--user` is given without `--group`, the + primary group ID for the user is used. The values of + the option are given to `getpwnam(3)` and `getgrnam(3)` + and numeric IDs are not supported. ++ +Giving these options is an error when used with `--inetd`; use +the facility of inet daemon to achieve the same before spawning +'git daemon' if needed. ++ +Like many programs that switch user id, the daemon does not reset +environment variables such as `$HOME` when it runs git programs, +e.g. `upload-pack` and `receive-pack`. When using this option, you +may also want to set and export `HOME` to point at the home +directory of `<user>` before starting the daemon, and make sure any +Git configuration files in that directory are readable by `<user>`. + +--enable=<service>:: +--disable=<service>:: + Enable/disable the service site-wide per default. Note + that a service disabled site-wide can still be enabled + per repository if it is marked overridable and the + repository enables the service with a configuration + item. + +--allow-override=<service>:: +--forbid-override=<service>:: + Allow/forbid overriding the site-wide default with per + repository configuration. By default, all the services + may be overridden. + +--[no-]informative-errors:: + When informative errors are turned on, git-daemon will report + more verbose errors to the client, differentiating conditions + like "no such repository" from "repository not exported". This + is more convenient for clients, but may leak information about + the existence of unexported repositories. When informative + errors are not enabled, all errors report "access denied" to the + client. The default is --no-informative-errors. + +--access-hook=<path>:: + Every time a client connects, first run an external command + specified by the <path> with service name (e.g. "upload-pack"), + path to the repository, hostname (%H), canonical hostname + (%CH), IP address (%IP), and TCP port (%P) as its command-line + arguments. The external command can decide to decline the + service by exiting with a non-zero status (or to allow it by + exiting with a zero status). It can also look at the $REMOTE_ADDR + and $REMOTE_PORT environment variables to learn about the + requestor when making this decision. ++ +The external command can optionally write a single line to its +standard output to be sent to the requestor as an error message when +it declines the service. + +<directory>:: + A directory to add to the whitelist of allowed directories. Unless + --strict-paths is specified this will also include subdirectories + of each named directory. + +SERVICES +-------- + +These services can be globally enabled/disabled using the +command-line options of this command. If finer-grained +control is desired (e.g. to allow 'git archive' to be run +against only in a few selected repositories the daemon serves), +the per-repository configuration file can be used to enable or +disable them. + +upload-pack:: + This serves 'git fetch-pack' and 'git ls-remote' + clients. It is enabled by default, but a repository can + disable it by setting `daemon.uploadpack` configuration + item to `false`. + +upload-archive:: + This serves 'git archive --remote'. It is disabled by + default, but a repository can enable it by setting + `daemon.uploadarch` configuration item to `true`. + +receive-pack:: + This serves 'git send-pack' clients, allowing anonymous + push. It is disabled by default, as there is _no_ + authentication in the protocol (in other words, anybody + can push anything into the repository, including removal + of refs). This is solely meant for a closed LAN setting + where everybody is friendly. This service can be + enabled by setting `daemon.receivepack` configuration item to + `true`. + +EXAMPLES +-------- +We assume the following in /etc/services:: ++ +------------ +$ grep 9418 /etc/services +git 9418/tcp # Git Version Control System +------------ + +'git daemon' as inetd server:: + To set up 'git daemon' as an inetd service that handles any + repository under the whitelisted set of directories, /pub/foo + and /pub/bar, place an entry like the following into + /etc/inetd all on one line: ++ +------------------------------------------------ + git stream tcp nowait nobody /usr/bin/git + git daemon --inetd --verbose --export-all + /pub/foo /pub/bar +------------------------------------------------ + + +'git daemon' as inetd server for virtual hosts:: + To set up 'git daemon' as an inetd service that handles + repositories for different virtual hosts, `www.example.com` + and `www.example.org`, place an entry like the following into + `/etc/inetd` all on one line: ++ +------------------------------------------------ + git stream tcp nowait nobody /usr/bin/git + git daemon --inetd --verbose --export-all + --interpolated-path=/pub/%H%D + /pub/www.example.org/software + /pub/www.example.com/software + /software +------------------------------------------------ ++ +In this example, the root-level directory `/pub` will contain +a subdirectory for each virtual host name supported. +Further, both hosts advertise repositories simply as +`git://www.example.com/software/repo.git`. For pre-1.4.0 +clients, a symlink from `/software` into the appropriate +default repository could be made as well. + + +'git daemon' as regular daemon for virtual hosts:: + To set up 'git daemon' as a regular, non-inetd service that + handles repositories for multiple virtual hosts based on + their IP addresses, start the daemon like this: ++ +------------------------------------------------ + git daemon --verbose --export-all + --interpolated-path=/pub/%IP/%D + /pub/192.168.1.200/software + /pub/10.10.220.23/software +------------------------------------------------ ++ +In this example, the root-level directory `/pub` will contain +a subdirectory for each virtual host IP address supported. +Repositories can still be accessed by hostname though, assuming +they correspond to these IP addresses. + +selectively enable/disable services per repository:: + To enable 'git archive --remote' and disable 'git fetch' against + a repository, have the following in the configuration file in the + repository (that is the file 'config' next to 'HEAD', 'refs' and + 'objects'). ++ +---------------------------------------------------------------- + [daemon] + uploadpack = false + uploadarch = true +---------------------------------------------------------------- + + +ENVIRONMENT +----------- +'git daemon' will set REMOTE_ADDR to the IP address of the client +that connected to it, if the IP address is available. REMOTE_ADDR will +be available in the environment of hooks called when +services are performed. + +GIT +--- +Part of the linkgit:git[1] suite diff --git a/Documentation/git-describe.txt b/Documentation/git-describe.txt new file mode 100644 index 0000000..c8f28c8 --- /dev/null +++ b/Documentation/git-describe.txt @@ -0,0 +1,169 @@ +git-describe(1) +=============== + +NAME +---- +git-describe - Describe a commit using the most recent tag reachable from it + + +SYNOPSIS +-------- +[verse] +'git describe' [--all] [--tags] [--contains] [--abbrev=<n>] [<commit-ish>...] +'git describe' [--all] [--tags] [--contains] [--abbrev=<n>] --dirty[=<mark>] + +DESCRIPTION +----------- +The command finds the most recent tag that is reachable from a +commit. If the tag points to the commit, then only the tag is +shown. Otherwise, it suffixes the tag name with the number of +additional commits on top of the tagged object and the +abbreviated object name of the most recent commit. + +By default (without --all or --tags) `git describe` only shows +annotated tags. For more information about creating annotated tags +see the -a and -s options to linkgit:git-tag[1]. + +OPTIONS +------- +<commit-ish>...:: + Commit-ish object names to describe. Defaults to HEAD if omitted. + +--dirty[=<mark>]:: + Describe the working tree. + It means describe HEAD and appends <mark> (`-dirty` by + default) if the working tree is dirty. + +--all:: + Instead of using only the annotated tags, use any ref + found in `refs/` namespace. This option enables matching + any known branch, remote-tracking branch, or lightweight tag. + +--tags:: + Instead of using only the annotated tags, use any tag + found in `refs/tags` namespace. This option enables matching + a lightweight (non-annotated) tag. + +--contains:: + Instead of finding the tag that predates the commit, find + the tag that comes after the commit, and thus contains it. + Automatically implies --tags. + +--abbrev=<n>:: + Instead of using the default 7 hexadecimal digits as the + abbreviated object name, use <n> digits, or as many digits + as needed to form a unique object name. An <n> of 0 + will suppress long format, only showing the closest tag. + +--candidates=<n>:: + Instead of considering only the 10 most recent tags as + candidates to describe the input commit-ish consider + up to <n> candidates. Increasing <n> above 10 will take + slightly longer but may produce a more accurate result. + An <n> of 0 will cause only exact matches to be output. + +--exact-match:: + Only output exact matches (a tag directly references the + supplied commit). This is a synonym for --candidates=0. + +--debug:: + Verbosely display information about the searching strategy + being employed to standard error. The tag name will still + be printed to standard out. + +--long:: + Always output the long format (the tag, the number of commits + and the abbreviated commit name) even when it matches a tag. + This is useful when you want to see parts of the commit object name + in "describe" output, even when the commit in question happens to be + a tagged version. Instead of just emitting the tag name, it will + describe such a commit as v1.2-0-gdeadbee (0th commit since tag v1.2 + that points at object deadbee....). + +--match <pattern>:: + Only consider tags matching the given `glob(7)` pattern, + excluding the "refs/tags/" prefix. This can be used to avoid + leaking private tags from the repository. + +--always:: + Show uniquely abbreviated commit object as fallback. + +--first-parent:: + Follow only the first parent commit upon seeing a merge commit. + This is useful when you wish to not match tags on branches merged + in the history of the target commit. + +EXAMPLES +-------- + +With something like git.git current tree, I get: + + [torvalds@g5 git]$ git describe parent + v1.0.4-14-g2414721 + +i.e. the current head of my "parent" branch is based on v1.0.4, +but since it has a few commits on top of that, +describe has added the number of additional commits ("14") and +an abbreviated object name for the commit itself ("2414721") +at the end. + +The number of additional commits is the number +of commits which would be displayed by "git log v1.0.4..parent". +The hash suffix is "-g" + 7-char abbreviation for the tip commit +of parent (which was `2414721b194453f058079d897d13c4e377f92dc6`). +The "g" prefix stands for "git" and is used to allow describing the version of +a software depending on the SCM the software is managed with. This is useful +in an environment where people may use different SCMs. + +Doing a 'git describe' on a tag-name will just show the tag name: + + [torvalds@g5 git]$ git describe v1.0.4 + v1.0.4 + +With --all, the command can use branch heads as references, so +the output shows the reference path as well: + + [torvalds@g5 git]$ git describe --all --abbrev=4 v1.0.5^2 + tags/v1.0.0-21-g975b + + [torvalds@g5 git]$ git describe --all --abbrev=4 HEAD^ + heads/lt/describe-7-g975b + +With --abbrev set to 0, the command can be used to find the +closest tagname without any suffix: + + [torvalds@g5 git]$ git describe --abbrev=0 v1.0.5^2 + tags/v1.0.0 + +Note that the suffix you get if you type these commands today may be +longer than what Linus saw above when he ran these commands, as your +Git repository may have new commits whose object names begin with +975b that did not exist back then, and "-g975b" suffix alone may not +be sufficient to disambiguate these commits. + + +SEARCH STRATEGY +--------------- + +For each commit-ish supplied, 'git describe' will first look for +a tag which tags exactly that commit. Annotated tags will always +be preferred over lightweight tags, and tags with newer dates will +always be preferred over tags with older dates. If an exact match +is found, its name will be output and searching will stop. + +If an exact match was not found, 'git describe' will walk back +through the commit history to locate an ancestor commit which +has been tagged. The ancestor's tag will be output along with an +abbreviation of the input commit-ish's SHA-1. If '--first-parent' was +specified then the walk will only consider the first parent of each +commit. + +If multiple tags were found during the walk then the tag which +has the fewest commits different from the input commit-ish will be +selected and output. Here fewest commits different is defined as +the number of commits which would be shown by `git log tag..input` +will be the smallest number of commits possible. + +GIT +--- +Part of the linkgit:git[1] suite diff --git a/Documentation/git-diff-files.txt b/Documentation/git-diff-files.txt new file mode 100644 index 0000000..906774f --- /dev/null +++ b/Documentation/git-diff-files.txt @@ -0,0 +1,52 @@ +git-diff-files(1) +================= + +NAME +---- +git-diff-files - Compares files in the working tree and the index + + +SYNOPSIS +-------- +[verse] +'git diff-files' [-q] [-0|-1|-2|-3|-c|--cc] [<common diff options>] [<path>...] + +DESCRIPTION +----------- +Compares the files in the working tree and the index. When paths +are specified, compares only those named paths. Otherwise all +entries in the index are compared. The output format is the +same as for 'git diff-index' and 'git diff-tree'. + +OPTIONS +------- +include::diff-options.txt[] + +-1 --base:: +-2 --ours:: +-3 --theirs:: +-0:: + Diff against the "base" version, "our branch" or "their + branch" respectively. With these options, diffs for + merged entries are not shown. ++ +The default is to diff against our branch (-2) and the +cleanly resolved paths. The option -0 can be given to +omit diff output for unmerged entries and just show "Unmerged". + +-c:: +--cc:: + This compares stage 2 (our branch), stage 3 (their + branch) and the working tree file and outputs a combined + diff, similar to the way 'diff-tree' shows a merge + commit with these flags. + +-q:: + Remain silent even on nonexistent files + + +include::diff-format.txt[] + +GIT +--- +Part of the linkgit:git[1] suite diff --git a/Documentation/git-diff-index.txt b/Documentation/git-diff-index.txt new file mode 100644 index 0000000..a86cf62 --- /dev/null +++ b/Documentation/git-diff-index.txt @@ -0,0 +1,122 @@ +git-diff-index(1) +================= + +NAME +---- +git-diff-index - Compare a tree to the working tree or index + + +SYNOPSIS +-------- +[verse] +'git diff-index' [-m] [--cached] [<common diff options>] <tree-ish> [<path>...] + +DESCRIPTION +----------- +Compares the content and mode of the blobs found in a tree object +with the corresponding tracked files in the working tree, or with the +corresponding paths in the index. When <path> arguments are present, +compares only paths matching those patterns. Otherwise all tracked +files are compared. + +OPTIONS +------- +include::diff-options.txt[] + +<tree-ish>:: + The id of a tree object to diff against. + +--cached:: + do not consider the on-disk file at all + +-m:: + By default, files recorded in the index but not checked + out are reported as deleted. This flag makes + 'git diff-index' say that all non-checked-out files are up + to date. + +include::diff-format.txt[] + +Operating Modes +--------------- +You can choose whether you want to trust the index file entirely +(using the '--cached' flag) or ask the diff logic to show any files +that don't match the stat state as being "tentatively changed". Both +of these operations are very useful indeed. + +Cached Mode +----------- +If '--cached' is specified, it allows you to ask: + + show me the differences between HEAD and the current index + contents (the ones I'd write using 'git write-tree') + +For example, let's say that you have worked on your working directory, updated +some files in the index and are ready to commit. You want to see exactly +*what* you are going to commit, without having to write a new tree +object and compare it that way, and to do that, you just do + + git diff-index --cached HEAD + +Example: let's say I had renamed `commit.c` to `git-commit.c`, and I had +done an `update-index` to make that effective in the index file. +`git diff-files` wouldn't show anything at all, since the index file +matches my working directory. But doing a 'git diff-index' does: + + torvalds@ppc970:~/git> git diff-index --cached HEAD + -100644 blob 4161aecc6700a2eb579e842af0b7f22b98443f74 commit.c + +100644 blob 4161aecc6700a2eb579e842af0b7f22b98443f74 git-commit.c + +You can see easily that the above is a rename. + +In fact, `git diff-index --cached` *should* always be entirely equivalent to +actually doing a 'git write-tree' and comparing that. Except this one is much +nicer for the case where you just want to check where you are. + +So doing a `git diff-index --cached` is basically very useful when you are +asking yourself "what have I already marked for being committed, and +what's the difference to a previous tree". + +Non-cached Mode +--------------- +The "non-cached" mode takes a different approach, and is potentially +the more useful of the two in that what it does can't be emulated with +a 'git write-tree' + 'git diff-tree'. Thus that's the default mode. +The non-cached version asks the question: + + show me the differences between HEAD and the currently checked out + tree - index contents _and_ files that aren't up-to-date + +which is obviously a very useful question too, since that tells you what +you *could* commit. Again, the output matches the 'git diff-tree -r' +output to a tee, but with a twist. + +The twist is that if some file doesn't match the index, we don't have +a backing store thing for it, and we use the magic "all-zero" sha1 to +show that. So let's say that you have edited `kernel/sched.c`, but +have not actually done a 'git update-index' on it yet - there is no +"object" associated with the new state, and you get: + + torvalds@ppc970:~/v2.6/linux> git diff-index --abbrev HEAD + :100644 100664 7476bb... 000000... kernel/sched.c + +i.e., it shows that the tree has changed, and that `kernel/sched.c` has is +not up-to-date and may contain new stuff. The all-zero sha1 means that to +get the real diff, you need to look at the object in the working directory +directly rather than do an object-to-object diff. + +NOTE: As with other commands of this type, 'git diff-index' does not +actually look at the contents of the file at all. So maybe +`kernel/sched.c` hasn't actually changed, and it's just that you +touched it. In either case, it's a note that you need to +'git update-index' it to make the index be in sync. + +NOTE: You can have a mixture of files show up as "has been updated" +and "is still dirty in the working directory" together. You can always +tell which file is in which state, since the "has been updated" ones +show a valid sha1, and the "not in sync with the index" ones will +always have the special all-zero sha1. + +GIT +--- +Part of the linkgit:git[1] suite diff --git a/Documentation/git-diff-tree.txt b/Documentation/git-diff-tree.txt new file mode 100644 index 0000000..1439486 --- /dev/null +++ b/Documentation/git-diff-tree.txt @@ -0,0 +1,167 @@ +git-diff-tree(1) +================ + +NAME +---- +git-diff-tree - Compares the content and mode of blobs found via two tree objects + + +SYNOPSIS +-------- +[verse] +'git diff-tree' [--stdin] [-m] [-s] [-v] [--no-commit-id] [--pretty] + [-t] [-r] [-c | --cc] [--root] [<common diff options>] + <tree-ish> [<tree-ish>] [<path>...] + +DESCRIPTION +----------- +Compares the content and mode of the blobs found via two tree objects. + +If there is only one <tree-ish> given, the commit is compared with its parents +(see --stdin below). + +Note that 'git diff-tree' can use the tree encapsulated in a commit object. + +OPTIONS +------- +include::diff-options.txt[] + +<tree-ish>:: + The id of a tree object. + +<path>...:: + If provided, the results are limited to a subset of files + matching one of these prefix strings. + i.e., file matches `/^<pattern1>|<pattern2>|.../` + Note that this parameter does not provide any wildcard or regexp + features. + +-r:: + recurse into sub-trees + +-t:: + show tree entry itself as well as subtrees. Implies -r. + +--root:: + When '--root' is specified the initial commit will be shown as a big + creation event. This is equivalent to a diff against the NULL tree. + +--stdin:: + When '--stdin' is specified, the command does not take + <tree-ish> arguments from the command line. Instead, it + reads lines containing either two <tree>, one <commit>, or a + list of <commit> from its standard input. (Use a single space + as separator.) ++ +When two trees are given, it compares the first tree with the second. +When a single commit is given, it compares the commit with its +parents. The remaining commits, when given, are used as if they are +parents of the first commit. ++ +When comparing two trees, the ID of both trees (separated by a space +and terminated by a newline) is printed before the difference. When +comparing commits, the ID of the first (or only) commit, followed by a +newline, is printed. ++ +The following flags further affect the behavior when comparing +commits (but not trees). + +-m:: + By default, 'git diff-tree --stdin' does not show + differences for merge commits. With this flag, it shows + differences to that commit from all of its parents. See + also '-c'. + +-s:: + By default, 'git diff-tree --stdin' shows differences, + either in machine-readable form (without '-p') or in patch + form (with '-p'). This output can be suppressed. It is + only useful with '-v' flag. + +-v:: + This flag causes 'git diff-tree --stdin' to also show + the commit message before the differences. + +include::pretty-options.txt[] + +--no-commit-id:: + 'git diff-tree' outputs a line with the commit ID when + applicable. This flag suppressed the commit ID output. + +-c:: + This flag changes the way a merge commit is displayed + (which means it is useful only when the command is given + one <tree-ish>, or '--stdin'). It shows the differences + from each of the parents to the merge result simultaneously + instead of showing pairwise diff between a parent and the + result one at a time (which is what the '-m' option does). + Furthermore, it lists only files which were modified + from all parents. + +--cc:: + This flag changes the way a merge commit patch is displayed, + in a similar way to the '-c' option. It implies the '-c' + and '-p' options and further compresses the patch output + by omitting uninteresting hunks whose the contents in the parents + have only two variants and the merge result picks one of them + without modification. When all hunks are uninteresting, the commit + itself and the commit log message is not shown, just like in any other + "empty diff" case. + +--always:: + Show the commit itself and the commit log message even + if the diff itself is empty. + + +include::pretty-formats.txt[] + + +Limiting Output +--------------- +If you're only interested in differences in a subset of files, for +example some architecture-specific files, you might do: + + git diff-tree -r <tree-ish> <tree-ish> arch/ia64 include/asm-ia64 + +and it will only show you what changed in those two directories. + +Or if you are searching for what changed in just `kernel/sched.c`, just do + + git diff-tree -r <tree-ish> <tree-ish> kernel/sched.c + +and it will ignore all differences to other files. + +The pattern is always the prefix, and is matched exactly. There are no +wildcards. Even stricter, it has to match a complete path component. +I.e. "foo" does not pick up `foobar.h`. "foo" does match `foo/bar.h` +so it can be used to name subdirectories. + +An example of normal usage is: + + torvalds@ppc970:~/git> git diff-tree --abbrev 5319e4 + :100664 100664 ac348b... a01513... git-fsck-objects.c + +which tells you that the last commit changed just one file (it's from +this one: + +----------------------------------------------------------------------------- +commit 3c6f7ca19ad4043e9e72fa94106f352897e651a8 +tree 5319e4d609cdd282069cc4dce33c1db559539b03 +parent b4e628ea30d5ab3606119d2ea5caeab141d38df7 +author Linus Torvalds <torvalds@ppc970.osdl.org> Sat Apr 9 12:02:30 2005 +committer Linus Torvalds <torvalds@ppc970.osdl.org> Sat Apr 9 12:02:30 2005 + +Make "git-fsck-objects" print out all the root commits it finds. + +Once I do the reference tracking, I'll also make it print out all the +HEAD commits it finds, which is even more interesting. +----------------------------------------------------------------------------- + +in case you care). + + +include::diff-format.txt[] + +GIT +--- +Part of the linkgit:git[1] suite diff --git a/Documentation/git-diff.txt b/Documentation/git-diff.txt new file mode 100644 index 0000000..bbab35f --- /dev/null +++ b/Documentation/git-diff.txt @@ -0,0 +1,189 @@ +git-diff(1) +=========== + +NAME +---- +git-diff - Show changes between commits, commit and working tree, etc + + +SYNOPSIS +-------- +[verse] +'git diff' [options] [<commit>] [--] [<path>...] +'git diff' [options] --cached [<commit>] [--] [<path>...] +'git diff' [options] <commit> <commit> [--] [<path>...] +'git diff' [options] <blob> <blob> +'git diff' [options] [--no-index] [--] <path> <path> + +DESCRIPTION +----------- +Show changes between the working tree and the index or a tree, changes +between the index and a tree, changes between two trees, changes between +two blob objects, or changes between two files on disk. + +'git diff' [--options] [--] [<path>...]:: + + This form is to view the changes you made relative to + the index (staging area for the next commit). In other + words, the differences are what you _could_ tell Git to + further add to the index but you still haven't. You can + stage these changes by using linkgit:git-add[1]. + +'git diff' --no-index [--options] [--] [<path>...]:: + + This form is to compare the given two paths on the + filesystem. You can omit the `--no-index` option when + running the command in a working tree controlled by Git and + at least one of the paths points outside the working tree, + or when running the command outside a working tree + controlled by Git. + +'git diff' [--options] --cached [<commit>] [--] [<path>...]:: + + This form is to view the changes you staged for the next + commit relative to the named <commit>. Typically you + would want comparison with the latest commit, so if you + do not give <commit>, it defaults to HEAD. + If HEAD does not exist (e.g. unborn branches) and + <commit> is not given, it shows all staged changes. + --staged is a synonym of --cached. + +'git diff' [--options] <commit> [--] [<path>...]:: + + This form is to view the changes you have in your + working tree relative to the named <commit>. You can + use HEAD to compare it with the latest commit, or a + branch name to compare with the tip of a different + branch. + +'git diff' [--options] <commit> <commit> [--] [<path>...]:: + + This is to view the changes between two arbitrary + <commit>. + +'git diff' [--options] <commit>..<commit> [--] [<path>...]:: + + This is synonymous to the previous form. If <commit> on + one side is omitted, it will have the same effect as + using HEAD instead. + +'git diff' [--options] <commit>\...<commit> [--] [<path>...]:: + + This form is to view the changes on the branch containing + and up to the second <commit>, starting at a common ancestor + of both <commit>. "git diff A\...B" is equivalent to + "git diff $(git-merge-base A B) B". You can omit any one + of <commit>, which has the same effect as using HEAD instead. + +Just in case if you are doing something exotic, it should be +noted that all of the <commit> in the above description, except +in the last two forms that use ".." notations, can be any +<tree>. + +For a more complete list of ways to spell <commit>, see +"SPECIFYING REVISIONS" section in linkgit:gitrevisions[7]. +However, "diff" is about comparing two _endpoints_, not ranges, +and the range notations ("<commit>..<commit>" and +"<commit>\...<commit>") do not mean a range as defined in the +"SPECIFYING RANGES" section in linkgit:gitrevisions[7]. + +'git diff' [options] <blob> <blob>:: + + This form is to view the differences between the raw + contents of two blob objects. + +OPTIONS +------- +:git-diff: 1 +include::diff-options.txt[] + +<path>...:: + The <paths> parameters, when given, are used to limit + the diff to the named paths (you can give directory + names and get diff for all files under them). + + +include::diff-format.txt[] + +EXAMPLES +-------- + +Various ways to check your working tree:: ++ +------------ +$ git diff <1> +$ git diff --cached <2> +$ git diff HEAD <3> +------------ ++ +<1> Changes in the working tree not yet staged for the next commit. +<2> Changes between the index and your last commit; what you +would be committing if you run "git commit" without "-a" option. +<3> Changes in the working tree since your last commit; what you +would be committing if you run "git commit -a" + +Comparing with arbitrary commits:: ++ +------------ +$ git diff test <1> +$ git diff HEAD -- ./test <2> +$ git diff HEAD^ HEAD <3> +------------ ++ +<1> Instead of using the tip of the current branch, compare with the +tip of "test" branch. +<2> Instead of comparing with the tip of "test" branch, compare with +the tip of the current branch, but limit the comparison to the +file "test". +<3> Compare the version before the last commit and the last commit. + +Comparing branches:: ++ +------------ +$ git diff topic master <1> +$ git diff topic..master <2> +$ git diff topic...master <3> +------------ ++ +<1> Changes between the tips of the topic and the master branches. +<2> Same as above. +<3> Changes that occurred on the master branch since when the topic +branch was started off it. + +Limiting the diff output:: ++ +------------ +$ git diff --diff-filter=MRC <1> +$ git diff --name-status <2> +$ git diff arch/i386 include/asm-i386 <3> +------------ ++ +<1> Show only modification, rename, and copy, but not addition +or deletion. +<2> Show only names and the nature of change, but not actual +diff output. +<3> Limit diff output to named subtrees. + +Munging the diff output:: ++ +------------ +$ git diff --find-copies-harder -B -C <1> +$ git diff -R <2> +------------ ++ +<1> Spend extra cycles to find renames, copies and complete +rewrites (very expensive). +<2> Output diff in reverse. + +SEE ALSO +-------- +diff(1), +linkgit:git-difftool[1], +linkgit:git-log[1], +linkgit:gitdiffcore[7], +linkgit:git-format-patch[1], +linkgit:git-apply[1] + +GIT +--- +Part of the linkgit:git[1] suite diff --git a/Documentation/git-difftool.txt b/Documentation/git-difftool.txt new file mode 100644 index 0000000..333cf6f --- /dev/null +++ b/Documentation/git-difftool.txt @@ -0,0 +1,146 @@ +git-difftool(1) +=============== + +NAME +---- +git-difftool - Show changes using common diff tools + +SYNOPSIS +-------- +[verse] +'git difftool' [<options>] [<commit> [<commit>]] [--] [<path>...] + +DESCRIPTION +----------- +'git difftool' is a Git command that allows you to compare and edit files +between revisions using common diff tools. 'git difftool' is a frontend +to 'git diff' and accepts the same options and arguments. See +linkgit:git-diff[1]. + +OPTIONS +------- +-d:: +--dir-diff:: + Copy the modified files to a temporary location and perform + a directory diff on them. This mode never prompts before + launching the diff tool. + +-y:: +--no-prompt:: + Do not prompt before launching a diff tool. + +--prompt:: + Prompt before each invocation of the diff tool. + This is the default behaviour; the option is provided to + override any configuration settings. + +-t <tool>:: +--tool=<tool>:: + Use the diff tool specified by <tool>. Valid values include + emerge, kompare, meld, and vimdiff. Run `git difftool --tool-help` + for the list of valid <tool> settings. ++ +If a diff tool is not specified, 'git difftool' +will use the configuration variable `diff.tool`. If the +configuration variable `diff.tool` is not set, 'git difftool' +will pick a suitable default. ++ +You can explicitly provide a full path to the tool by setting the +configuration variable `difftool.<tool>.path`. For example, you +can configure the absolute path to kdiff3 by setting +`difftool.kdiff3.path`. Otherwise, 'git difftool' assumes the +tool is available in PATH. ++ +Instead of running one of the known diff tools, +'git difftool' can be customized to run an alternative program +by specifying the command line to invoke in a configuration +variable `difftool.<tool>.cmd`. ++ +When 'git difftool' is invoked with this tool (either through the +`-t` or `--tool` option or the `diff.tool` configuration variable) +the configured command line will be invoked with the following +variables available: `$LOCAL` is set to the name of the temporary +file containing the contents of the diff pre-image and `$REMOTE` +is set to the name of the temporary file containing the contents +of the diff post-image. `$MERGED` is the name of the file which is +being compared. `$BASE` is provided for compatibility +with custom merge tool commands and has the same value as `$MERGED`. + +--tool-help:: + Print a list of diff tools that may be used with `--tool`. + +--[no-]symlinks:: + 'git difftool''s default behavior is create symlinks to the + working tree when run in `--dir-diff` mode and the right-hand + side of the comparison yields the same content as the file in + the working tree. ++ +Specifying `--no-symlinks` instructs 'git difftool' to create copies +instead. `--no-symlinks` is the default on Windows. + +-x <command>:: +--extcmd=<command>:: + Specify a custom command for viewing diffs. + 'git-difftool' ignores the configured defaults and runs + `$command $LOCAL $REMOTE` when this option is specified. + Additionally, `$BASE` is set in the environment. + +-g:: +--gui:: + When 'git-difftool' is invoked with the `-g` or `--gui` option + the default diff tool will be read from the configured + `diff.guitool` variable instead of `diff.tool`. + +--[no-]trust-exit-code:: + 'git-difftool' invokes a diff tool individually on each file. + Errors reported by the diff tool are ignored by default. + Use `--trust-exit-code` to make 'git-difftool' exit when an + invoked diff tool returns a non-zero exit code. ++ +'git-difftool' will forward the exit code of the invoked tool when +'--trust-exit-code' is used. + +See linkgit:git-diff[1] for the full list of supported options. + +CONFIG VARIABLES +---------------- +'git difftool' falls back to 'git mergetool' config variables when the +difftool equivalents have not been defined. + +diff.tool:: + The default diff tool to use. + +diff.guitool:: + The default diff tool to use when `--gui` is specified. + +difftool.<tool>.path:: + Override the path for the given tool. This is useful in case + your tool is not in the PATH. + +difftool.<tool>.cmd:: + Specify the command to invoke the specified diff tool. ++ +See the `--tool=<tool>` option above for more details. + +difftool.prompt:: + Prompt before each invocation of the diff tool. + +difftool.trustExitCode:: + Exit difftool if the invoked diff tool returns a non-zero exit status. ++ +See the `--trust-exit-code` option above for more details. + +SEE ALSO +-------- +linkgit:git-diff[1]:: + Show changes between commits, commit and working tree, etc + +linkgit:git-mergetool[1]:: + Run merge conflict resolution tools to resolve merge conflicts + +linkgit:git-config[1]:: + Get and set repository or global options + +GIT +--- +Part of the linkgit:git[1] suite diff --git a/Documentation/git-fast-export.txt b/Documentation/git-fast-export.txt new file mode 100644 index 0000000..ed57c68 --- /dev/null +++ b/Documentation/git-fast-export.txt @@ -0,0 +1,218 @@ +git-fast-export(1) +================== + +NAME +---- +git-fast-export - Git data exporter + + +SYNOPSIS +-------- +[verse] +'git fast-export [options]' | 'git fast-import' + +DESCRIPTION +----------- +This program dumps the given revisions in a form suitable to be piped +into 'git fast-import'. + +You can use it as a human-readable bundle replacement (see +linkgit:git-bundle[1]), or as a kind of an interactive +'git filter-branch'. + + +OPTIONS +------- +--progress=<n>:: + Insert 'progress' statements every <n> objects, to be shown by + 'git fast-import' during import. + +--signed-tags=(verbatim|warn|warn-strip|strip|abort):: + Specify how to handle signed tags. Since any transformation + after the export can change the tag names (which can also happen + when excluding revisions) the signatures will not match. ++ +When asking to 'abort' (which is the default), this program will die +when encountering a signed tag. With 'strip', the tags will silently +be made unsigned, with 'warn-strip' they will be made unsigned but a +warning will be displayed, with 'verbatim', they will be silently +exported and with 'warn', they will be exported, but you will see a +warning. + +--tag-of-filtered-object=(abort|drop|rewrite):: + Specify how to handle tags whose tagged object is filtered out. + Since revisions and files to export can be limited by path, + tagged objects may be filtered completely. ++ +When asking to 'abort' (which is the default), this program will die +when encountering such a tag. With 'drop' it will omit such tags from +the output. With 'rewrite', if the tagged object is a commit, it will +rewrite the tag to tag an ancestor commit (via parent rewriting; see +linkgit:git-rev-list[1]) + +-M:: +-C:: + Perform move and/or copy detection, as described in the + linkgit:git-diff[1] manual page, and use it to generate + rename and copy commands in the output dump. ++ +Note that earlier versions of this command did not complain and +produced incorrect results if you gave these options. + +--export-marks=<file>:: + Dumps the internal marks table to <file> when complete. + Marks are written one per line as `:markid SHA-1`. Only marks + for revisions are dumped; marks for blobs are ignored. + Backends can use this file to validate imports after they + have been completed, or to save the marks table across + incremental runs. As <file> is only opened and truncated + at completion, the same path can also be safely given to + --import-marks. + The file will not be written if no new object has been + marked/exported. + +--import-marks=<file>:: + Before processing any input, load the marks specified in + <file>. The input file must exist, must be readable, and + must use the same format as produced by --export-marks. ++ +Any commits that have already been marked will not be exported again. +If the backend uses a similar --import-marks file, this allows for +incremental bidirectional exporting of the repository by keeping the +marks the same across runs. + +--fake-missing-tagger:: + Some old repositories have tags without a tagger. The + fast-import protocol was pretty strict about that, and did not + allow that. So fake a tagger to be able to fast-import the + output. + +--use-done-feature:: + Start the stream with a 'feature done' stanza, and terminate + it with a 'done' command. + +--no-data:: + Skip output of blob objects and instead refer to blobs via + their original SHA-1 hash. This is useful when rewriting the + directory structure or history of a repository without + touching the contents of individual files. Note that the + resulting stream can only be used by a repository which + already contains the necessary objects. + +--full-tree:: + This option will cause fast-export to issue a "deleteall" + directive for each commit followed by a full list of all files + in the commit (as opposed to just listing the files which are + different from the commit's first parent). + +--anonymize:: + Anonymize the contents of the repository while still retaining + the shape of the history and stored tree. See the section on + `ANONYMIZING` below. + +--refspec:: + Apply the specified refspec to each ref exported. Multiple of them can + be specified. + +[<git-rev-list-args>...]:: + A list of arguments, acceptable to 'git rev-parse' and + 'git rev-list', that specifies the specific objects and references + to export. For example, `master~10..master` causes the + current master reference to be exported along with all objects + added since its 10th ancestor commit. + +EXAMPLES +-------- + +------------------------------------------------------------------- +$ git fast-export --all | (cd /empty/repository && git fast-import) +------------------------------------------------------------------- + +This will export the whole repository and import it into the existing +empty repository. Except for reencoding commits that are not in +UTF-8, it would be a one-to-one mirror. + +----------------------------------------------------- +$ git fast-export master~5..master | + sed "s|refs/heads/master|refs/heads/other|" | + git fast-import +----------------------------------------------------- + +This makes a new branch called 'other' from 'master~5..master' +(i.e. if 'master' has linear history, it will take the last 5 commits). + +Note that this assumes that none of the blobs and commit messages +referenced by that revision range contains the string +'refs/heads/master'. + + +ANONYMIZING +----------- + +If the `--anonymize` option is given, git will attempt to remove all +identifying information from the repository while still retaining enough +of the original tree and history patterns to reproduce some bugs. The +goal is that a git bug which is found on a private repository will +persist in the anonymized repository, and the latter can be shared with +git developers to help solve the bug. + +With this option, git will replace all refnames, paths, blob contents, +commit and tag messages, names, and email addresses in the output with +anonymized data. Two instances of the same string will be replaced +equivalently (e.g., two commits with the same author will have the same +anonymized author in the output, but bear no resemblance to the original +author string). The relationship between commits, branches, and tags is +retained, as well as the commit timestamps (but the commit messages and +refnames bear no resemblance to the originals). The relative makeup of +the tree is retained (e.g., if you have a root tree with 10 files and 3 +trees, so will the output), but their names and the contents of the +files will be replaced. + +If you think you have found a git bug, you can start by exporting an +anonymized stream of the whole repository: + +--------------------------------------------------- +$ git fast-export --anonymize --all >anon-stream +--------------------------------------------------- + +Then confirm that the bug persists in a repository created from that +stream (many bugs will not, as they really do depend on the exact +repository contents): + +--------------------------------------------------- +$ git init anon-repo +$ cd anon-repo +$ git fast-import <../anon-stream +$ ... test your bug ... +--------------------------------------------------- + +If the anonymized repository shows the bug, it may be worth sharing +`anon-stream` along with a regular bug report. Note that the anonymized +stream compresses very well, so gzipping it is encouraged. If you want +to examine the stream to see that it does not contain any private data, +you can peruse it directly before sending. You may also want to try: + +--------------------------------------------------- +$ perl -pe 's/\d+/X/g' <anon-stream | sort -u | less +--------------------------------------------------- + +which shows all of the unique lines (with numbers converted to "X", to +collapse "User 0", "User 1", etc into "User X"). This produces a much +smaller output, and it is usually easy to quickly confirm that there is +no private data in the stream. + + +Limitations +----------- + +Since 'git fast-import' cannot tag trees, you will not be +able to export the linux.git repository completely, as it contains +a tag referencing a tree instead of a commit. + +SEE ALSO +-------- +linkgit:git-fast-import[1] + +GIT +--- +Part of the linkgit:git[1] suite diff --git a/Documentation/git-fast-import.txt b/Documentation/git-fast-import.txt new file mode 100644 index 0000000..66910aa --- /dev/null +++ b/Documentation/git-fast-import.txt @@ -0,0 +1,1473 @@ +git-fast-import(1) +================== + +NAME +---- +git-fast-import - Backend for fast Git data importers + + +SYNOPSIS +-------- +[verse] +frontend | 'git fast-import' [options] + +DESCRIPTION +----------- +This program is usually not what the end user wants to run directly. +Most end users want to use one of the existing frontend programs, +which parses a specific type of foreign source and feeds the contents +stored there to 'git fast-import'. + +fast-import reads a mixed command/data stream from standard input and +writes one or more packfiles directly into the current repository. +When EOF is received on standard input, fast import writes out +updated branch and tag refs, fully updating the current repository +with the newly imported data. + +The fast-import backend itself can import into an empty repository (one that +has already been initialized by 'git init') or incrementally +update an existing populated repository. Whether or not incremental +imports are supported from a particular foreign source depends on +the frontend program in use. + + +OPTIONS +------- + +--force:: + Force updating modified existing branches, even if doing + so would cause commits to be lost (as the new commit does + not contain the old commit). + +--quiet:: + Disable all non-fatal output, making fast-import silent when it + is successful. This option disables the output shown by + --stats. + +--stats:: + Display some basic statistics about the objects fast-import has + created, the packfiles they were stored into, and the + memory used by fast-import during this run. Showing this output + is currently the default, but can be disabled with --quiet. + +Options for Frontends +~~~~~~~~~~~~~~~~~~~~~ + +--cat-blob-fd=<fd>:: + Write responses to `get-mark`, `cat-blob`, and `ls` queries to the + file descriptor <fd> instead of `stdout`. Allows `progress` + output intended for the end-user to be separated from other + output. + +--date-format=<fmt>:: + Specify the type of dates the frontend will supply to + fast-import within `author`, `committer` and `tagger` commands. + See ``Date Formats'' below for details about which formats + are supported, and their syntax. + +--done:: + Terminate with error if there is no `done` command at the end of + the stream. This option might be useful for detecting errors + that cause the frontend to terminate before it has started to + write a stream. + +Locations of Marks Files +~~~~~~~~~~~~~~~~~~~~~~~~ + +--export-marks=<file>:: + Dumps the internal marks table to <file> when complete. + Marks are written one per line as `:markid SHA-1`. + Frontends can use this file to validate imports after they + have been completed, or to save the marks table across + incremental runs. As <file> is only opened and truncated + at checkpoint (or completion) the same path can also be + safely given to --import-marks. + +--import-marks=<file>:: + Before processing any input, load the marks specified in + <file>. The input file must exist, must be readable, and + must use the same format as produced by --export-marks. + Multiple options may be supplied to import more than one + set of marks. If a mark is defined to different values, + the last file wins. + +--import-marks-if-exists=<file>:: + Like --import-marks but instead of erroring out, silently + skips the file if it does not exist. + +--[no-]relative-marks:: + After specifying --relative-marks the paths specified + with --import-marks= and --export-marks= are relative + to an internal directory in the current repository. + In git-fast-import this means that the paths are relative + to the .git/info/fast-import directory. However, other + importers may use a different location. ++ +Relative and non-relative marks may be combined by interweaving +--(no-)-relative-marks with the --(import|export)-marks= options. + +Performance and Compression Tuning +~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ + +--active-branches=<n>:: + Maximum number of branches to maintain active at once. + See ``Memory Utilization'' below for details. Default is 5. + +--big-file-threshold=<n>:: + Maximum size of a blob that fast-import will attempt to + create a delta for, expressed in bytes. The default is 512m + (512 MiB). Some importers may wish to lower this on systems + with constrained memory. + +--depth=<n>:: + Maximum delta depth, for blob and tree deltification. + Default is 10. + +--export-pack-edges=<file>:: + After creating a packfile, print a line of data to + <file> listing the filename of the packfile and the last + commit on each branch that was written to that packfile. + This information may be useful after importing projects + whose total object set exceeds the 4 GiB packfile limit, + as these commits can be used as edge points during calls + to 'git pack-objects'. + +--max-pack-size=<n>:: + Maximum size of each output packfile. + The default is unlimited. + + +Performance +----------- +The design of fast-import allows it to import large projects in a minimum +amount of memory usage and processing time. Assuming the frontend +is able to keep up with fast-import and feed it a constant stream of data, +import times for projects holding 10+ years of history and containing +100,000+ individual commits are generally completed in just 1-2 +hours on quite modest (~$2,000 USD) hardware. + +Most bottlenecks appear to be in foreign source data access (the +source just cannot extract revisions fast enough) or disk IO (fast-import +writes as fast as the disk will take the data). Imports will run +faster if the source data is stored on a different drive than the +destination Git repository (due to less IO contention). + + +Development Cost +---------------- +A typical frontend for fast-import tends to weigh in at approximately 200 +lines of Perl/Python/Ruby code. Most developers have been able to +create working importers in just a couple of hours, even though it +is their first exposure to fast-import, and sometimes even to Git. This is +an ideal situation, given that most conversion tools are throw-away +(use once, and never look back). + + +Parallel Operation +------------------ +Like 'git push' or 'git fetch', imports handled by fast-import are safe to +run alongside parallel `git repack -a -d` or `git gc` invocations, +or any other Git operation (including 'git prune', as loose objects +are never used by fast-import). + +fast-import does not lock the branch or tag refs it is actively importing. +After the import, during its ref update phase, fast-import tests each +existing branch ref to verify the update will be a fast-forward +update (the commit stored in the ref is contained in the new +history of the commit to be written). If the update is not a +fast-forward update, fast-import will skip updating that ref and instead +prints a warning message. fast-import will always attempt to update all +branch refs, and does not stop on the first failure. + +Branch updates can be forced with --force, but it's recommended that +this only be used on an otherwise quiet repository. Using --force +is not necessary for an initial import into an empty repository. + + +Technical Discussion +-------------------- +fast-import tracks a set of branches in memory. Any branch can be created +or modified at any point during the import process by sending a +`commit` command on the input stream. This design allows a frontend +program to process an unlimited number of branches simultaneously, +generating commits in the order they are available from the source +data. It also simplifies the frontend programs considerably. + +fast-import does not use or alter the current working directory, or any +file within it. (It does however update the current Git repository, +as referenced by `GIT_DIR`.) Therefore an import frontend may use +the working directory for its own purposes, such as extracting file +revisions from the foreign source. This ignorance of the working +directory also allows fast-import to run very quickly, as it does not +need to perform any costly file update operations when switching +between branches. + +Input Format +------------ +With the exception of raw file data (which Git does not interpret) +the fast-import input format is text (ASCII) based. This text based +format simplifies development and debugging of frontend programs, +especially when a higher level language such as Perl, Python or +Ruby is being used. + +fast-import is very strict about its input. Where we say SP below we mean +*exactly* one space. Likewise LF means one (and only one) linefeed +and HT one (and only one) horizontal tab. +Supplying additional whitespace characters will cause unexpected +results, such as branch names or file names with leading or trailing +spaces in their name, or early termination of fast-import when it encounters +unexpected input. + +Stream Comments +~~~~~~~~~~~~~~~ +To aid in debugging frontends fast-import ignores any line that +begins with `#` (ASCII pound/hash) up to and including the line +ending `LF`. A comment line may contain any sequence of bytes +that does not contain an LF and therefore may be used to include +any detailed debugging information that might be specific to the +frontend and useful when inspecting a fast-import data stream. + +Date Formats +~~~~~~~~~~~~ +The following date formats are supported. A frontend should select +the format it will use for this import by passing the format name +in the --date-format=<fmt> command-line option. + +`raw`:: + This is the Git native format and is `<time> SP <offutc>`. + It is also fast-import's default format, if --date-format was + not specified. ++ +The time of the event is specified by `<time>` as the number of +seconds since the UNIX epoch (midnight, Jan 1, 1970, UTC) and is +written as an ASCII decimal integer. ++ +The local offset is specified by `<offutc>` as a positive or negative +offset from UTC. For example EST (which is 5 hours behind UTC) +would be expressed in `<tz>` by ``-0500'' while UTC is ``+0000''. +The local offset does not affect `<time>`; it is used only as an +advisement to help formatting routines display the timestamp. ++ +If the local offset is not available in the source material, use +``+0000'', or the most common local offset. For example many +organizations have a CVS repository which has only ever been accessed +by users who are located in the same location and time zone. In this +case a reasonable offset from UTC could be assumed. ++ +Unlike the `rfc2822` format, this format is very strict. Any +variation in formatting will cause fast-import to reject the value. + +`rfc2822`:: + This is the standard email format as described by RFC 2822. ++ +An example value is ``Tue Feb 6 11:22:18 2007 -0500''. The Git +parser is accurate, but a little on the lenient side. It is the +same parser used by 'git am' when applying patches +received from email. ++ +Some malformed strings may be accepted as valid dates. In some of +these cases Git will still be able to obtain the correct date from +the malformed string. There are also some types of malformed +strings which Git will parse wrong, and yet consider valid. +Seriously malformed strings will be rejected. ++ +Unlike the `raw` format above, the time zone/UTC offset information +contained in an RFC 2822 date string is used to adjust the date +value to UTC prior to storage. Therefore it is important that +this information be as accurate as possible. ++ +If the source material uses RFC 2822 style dates, +the frontend should let fast-import handle the parsing and conversion +(rather than attempting to do it itself) as the Git parser has +been well tested in the wild. ++ +Frontends should prefer the `raw` format if the source material +already uses UNIX-epoch format, can be coaxed to give dates in that +format, or its format is easily convertible to it, as there is no +ambiguity in parsing. + +`now`:: + Always use the current time and time zone. The literal + `now` must always be supplied for `<when>`. ++ +This is a toy format. The current time and time zone of this system +is always copied into the identity string at the time it is being +created by fast-import. There is no way to specify a different time or +time zone. ++ +This particular format is supplied as it's short to implement and +may be useful to a process that wants to create a new commit +right now, without needing to use a working directory or +'git update-index'. ++ +If separate `author` and `committer` commands are used in a `commit` +the timestamps may not match, as the system clock will be polled +twice (once for each command). The only way to ensure that both +author and committer identity information has the same timestamp +is to omit `author` (thus copying from `committer`) or to use a +date format other than `now`. + +Commands +~~~~~~~~ +fast-import accepts several commands to update the current repository +and control the current import process. More detailed discussion +(with examples) of each command follows later. + +`commit`:: + Creates a new branch or updates an existing branch by + creating a new commit and updating the branch to point at + the newly created commit. + +`tag`:: + Creates an annotated tag object from an existing commit or + branch. Lightweight tags are not supported by this command, + as they are not recommended for recording meaningful points + in time. + +`reset`:: + Reset an existing branch (or a new branch) to a specific + revision. This command must be used to change a branch to + a specific revision without making a commit on it. + +`blob`:: + Convert raw file data into a blob, for future use in a + `commit` command. This command is optional and is not + needed to perform an import. + +`checkpoint`:: + Forces fast-import to close the current packfile, generate its + unique SHA-1 checksum and index, and start a new packfile. + This command is optional and is not needed to perform + an import. + +`progress`:: + Causes fast-import to echo the entire line to its own + standard output. This command is optional and is not needed + to perform an import. + +`done`:: + Marks the end of the stream. This command is optional + unless the `done` feature was requested using the + `--done` command-line option or `feature done` command. + +`get-mark`:: + Causes fast-import to print the SHA-1 corresponding to a mark + to the file descriptor set with `--cat-blob-fd`, or `stdout` if + unspecified. + +`cat-blob`:: + Causes fast-import to print a blob in 'cat-file --batch' + format to the file descriptor set with `--cat-blob-fd` or + `stdout` if unspecified. + +`ls`:: + Causes fast-import to print a line describing a directory + entry in 'ls-tree' format to the file descriptor set with + `--cat-blob-fd` or `stdout` if unspecified. + +`feature`:: + Enable the specified feature. This requires that fast-import + supports the specified feature, and aborts if it does not. + +`option`:: + Specify any of the options listed under OPTIONS that do not + change stream semantic to suit the frontend's needs. This + command is optional and is not needed to perform an import. + +`commit` +~~~~~~~~ +Create or update a branch with a new commit, recording one logical +change to the project. + +.... + 'commit' SP <ref> LF + mark? + ('author' (SP <name>)? SP LT <email> GT SP <when> LF)? + 'committer' (SP <name>)? SP LT <email> GT SP <when> LF + data + ('from' SP <commit-ish> LF)? + ('merge' SP <commit-ish> LF)? + (filemodify | filedelete | filecopy | filerename | filedeleteall | notemodify)* + LF? +.... + +where `<ref>` is the name of the branch to make the commit on. +Typically branch names are prefixed with `refs/heads/` in +Git, so importing the CVS branch symbol `RELENG-1_0` would use +`refs/heads/RELENG-1_0` for the value of `<ref>`. The value of +`<ref>` must be a valid refname in Git. As `LF` is not valid in +a Git refname, no quoting or escaping syntax is supported here. + +A `mark` command may optionally appear, requesting fast-import to save a +reference to the newly created commit for future use by the frontend +(see below for format). It is very common for frontends to mark +every commit they create, thereby allowing future branch creation +from any imported commit. + +The `data` command following `committer` must supply the commit +message (see below for `data` command syntax). To import an empty +commit message use a 0 length data. Commit messages are free-form +and are not interpreted by Git. Currently they must be encoded in +UTF-8, as fast-import does not permit other encodings to be specified. + +Zero or more `filemodify`, `filedelete`, `filecopy`, `filerename`, +`filedeleteall` and `notemodify` commands +may be included to update the contents of the branch prior to +creating the commit. These commands may be supplied in any order. +However it is recommended that a `filedeleteall` command precede +all `filemodify`, `filecopy`, `filerename` and `notemodify` commands in +the same commit, as `filedeleteall` wipes the branch clean (see below). + +The `LF` after the command is optional (it used to be required). + +`author` +^^^^^^^^ +An `author` command may optionally appear, if the author information +might differ from the committer information. If `author` is omitted +then fast-import will automatically use the committer's information for +the author portion of the commit. See below for a description of +the fields in `author`, as they are identical to `committer`. + +`committer` +^^^^^^^^^^^ +The `committer` command indicates who made this commit, and when +they made it. + +Here `<name>` is the person's display name (for example +``Com M Itter'') and `<email>` is the person's email address +(``\cm@example.com''). `LT` and `GT` are the literal less-than (\x3c) +and greater-than (\x3e) symbols. These are required to delimit +the email address from the other fields in the line. Note that +`<name>` and `<email>` are free-form and may contain any sequence +of bytes, except `LT`, `GT` and `LF`. `<name>` is typically UTF-8 encoded. + +The time of the change is specified by `<when>` using the date format +that was selected by the --date-format=<fmt> command-line option. +See ``Date Formats'' above for the set of supported formats, and +their syntax. + +`from` +^^^^^^ +The `from` command is used to specify the commit to initialize +this branch from. This revision will be the first ancestor of the +new commit. The state of the tree built at this commit will begin +with the state at the `from` commit, and be altered by the content +modifications in this commit. + +Omitting the `from` command in the first commit of a new branch +will cause fast-import to create that commit with no ancestor. This +tends to be desired only for the initial commit of a project. +If the frontend creates all files from scratch when making a new +branch, a `merge` command may be used instead of `from` to start +the commit with an empty tree. +Omitting the `from` command on existing branches is usually desired, +as the current commit on that branch is automatically assumed to +be the first ancestor of the new commit. + +As `LF` is not valid in a Git refname or SHA-1 expression, no +quoting or escaping syntax is supported within `<commit-ish>`. + +Here `<commit-ish>` is any of the following: + +* The name of an existing branch already in fast-import's internal branch + table. If fast-import doesn't know the name, it's treated as a SHA-1 + expression. + +* A mark reference, `:<idnum>`, where `<idnum>` is the mark number. ++ +The reason fast-import uses `:` to denote a mark reference is this character +is not legal in a Git branch name. The leading `:` makes it easy +to distinguish between the mark 42 (`:42`) and the branch 42 (`42` +or `refs/heads/42`), or an abbreviated SHA-1 which happened to +consist only of base-10 digits. ++ +Marks must be declared (via `mark`) before they can be used. + +* A complete 40 byte or abbreviated commit SHA-1 in hex. + +* Any valid Git SHA-1 expression that resolves to a commit. See + ``SPECIFYING REVISIONS'' in linkgit:gitrevisions[7] for details. + +* The special null SHA-1 (40 zeros) specifies that the branch is to be + removed. + +The special case of restarting an incremental import from the +current branch value should be written as: +---- + from refs/heads/branch^0 +---- +The `^0` suffix is necessary as fast-import does not permit a branch to +start from itself, and the branch is created in memory before the +`from` command is even read from the input. Adding `^0` will force +fast-import to resolve the commit through Git's revision parsing library, +rather than its internal branch table, thereby loading in the +existing value of the branch. + +`merge` +^^^^^^^ +Includes one additional ancestor commit. The additional ancestry +link does not change the way the tree state is built at this commit. +If the `from` command is +omitted when creating a new branch, the first `merge` commit will be +the first ancestor of the current commit, and the branch will start +out with no files. An unlimited number of `merge` commands per +commit are permitted by fast-import, thereby establishing an n-way merge. + +Here `<commit-ish>` is any of the commit specification expressions +also accepted by `from` (see above). + +`filemodify` +^^^^^^^^^^^^ +Included in a `commit` command to add a new file or change the +content of an existing file. This command has two different means +of specifying the content of the file. + +External data format:: + The data content for the file was already supplied by a prior + `blob` command. The frontend just needs to connect it. ++ +.... + 'M' SP <mode> SP <dataref> SP <path> LF +.... ++ +Here usually `<dataref>` must be either a mark reference (`:<idnum>`) +set by a prior `blob` command, or a full 40-byte SHA-1 of an +existing Git blob object. If `<mode>` is `040000`` then +`<dataref>` must be the full 40-byte SHA-1 of an existing +Git tree object or a mark reference set with `--import-marks`. + +Inline data format:: + The data content for the file has not been supplied yet. + The frontend wants to supply it as part of this modify + command. ++ +.... + 'M' SP <mode> SP 'inline' SP <path> LF + data +.... ++ +See below for a detailed description of the `data` command. + +In both formats `<mode>` is the type of file entry, specified +in octal. Git only supports the following modes: + +* `100644` or `644`: A normal (not-executable) file. The majority + of files in most projects use this mode. If in doubt, this is + what you want. +* `100755` or `755`: A normal, but executable, file. +* `120000`: A symlink, the content of the file will be the link target. +* `160000`: A gitlink, SHA-1 of the object refers to a commit in + another repository. Git links can only be specified by SHA or through + a commit mark. They are used to implement submodules. +* `040000`: A subdirectory. Subdirectories can only be specified by + SHA or through a tree mark set with `--import-marks`. + +In both formats `<path>` is the complete path of the file to be added +(if not already existing) or modified (if already existing). + +A `<path>` string must use UNIX-style directory separators (forward +slash `/`), may contain any byte other than `LF`, and must not +start with double quote (`"`). + +A path can use C-style string quoting; this is accepted in all cases +and mandatory if the filename starts with double quote or contains +`LF`. In C-style quoting, the complete name should be surrounded with +double quotes, and any `LF`, backslash, or double quote characters +must be escaped by preceding them with a backslash (e.g., +`"path/with\n, \\ and \" in it"`). + +The value of `<path>` must be in canonical form. That is it must not: + +* contain an empty directory component (e.g. `foo//bar` is invalid), +* end with a directory separator (e.g. `foo/` is invalid), +* start with a directory separator (e.g. `/foo` is invalid), +* contain the special component `.` or `..` (e.g. `foo/./bar` and + `foo/../bar` are invalid). + +The root of the tree can be represented by an empty string as `<path>`. + +It is recommended that `<path>` always be encoded using UTF-8. + +`filedelete` +^^^^^^^^^^^^ +Included in a `commit` command to remove a file or recursively +delete an entire directory from the branch. If the file or directory +removal makes its parent directory empty, the parent directory will +be automatically removed too. This cascades up the tree until the +first non-empty directory or the root is reached. + +.... + 'D' SP <path> LF +.... + +here `<path>` is the complete path of the file or subdirectory to +be removed from the branch. +See `filemodify` above for a detailed description of `<path>`. + +`filecopy` +^^^^^^^^^^ +Recursively copies an existing file or subdirectory to a different +location within the branch. The existing file or directory must +exist. If the destination exists it will be completely replaced +by the content copied from the source. + +.... + 'C' SP <path> SP <path> LF +.... + +here the first `<path>` is the source location and the second +`<path>` is the destination. See `filemodify` above for a detailed +description of what `<path>` may look like. To use a source path +that contains SP the path must be quoted. + +A `filecopy` command takes effect immediately. Once the source +location has been copied to the destination any future commands +applied to the source location will not impact the destination of +the copy. + +`filerename` +^^^^^^^^^^^^ +Renames an existing file or subdirectory to a different location +within the branch. The existing file or directory must exist. If +the destination exists it will be replaced by the source directory. + +.... + 'R' SP <path> SP <path> LF +.... + +here the first `<path>` is the source location and the second +`<path>` is the destination. See `filemodify` above for a detailed +description of what `<path>` may look like. To use a source path +that contains SP the path must be quoted. + +A `filerename` command takes effect immediately. Once the source +location has been renamed to the destination any future commands +applied to the source location will create new files there and not +impact the destination of the rename. + +Note that a `filerename` is the same as a `filecopy` followed by a +`filedelete` of the source location. There is a slight performance +advantage to using `filerename`, but the advantage is so small +that it is never worth trying to convert a delete/add pair in +source material into a rename for fast-import. This `filerename` +command is provided just to simplify frontends that already have +rename information and don't want bother with decomposing it into a +`filecopy` followed by a `filedelete`. + +`filedeleteall` +^^^^^^^^^^^^^^^ +Included in a `commit` command to remove all files (and also all +directories) from the branch. This command resets the internal +branch structure to have no files in it, allowing the frontend +to subsequently add all interesting files from scratch. + +.... + 'deleteall' LF +.... + +This command is extremely useful if the frontend does not know +(or does not care to know) what files are currently on the branch, +and therefore cannot generate the proper `filedelete` commands to +update the content. + +Issuing a `filedeleteall` followed by the needed `filemodify` +commands to set the correct content will produce the same results +as sending only the needed `filemodify` and `filedelete` commands. +The `filedeleteall` approach may however require fast-import to use slightly +more memory per active branch (less than 1 MiB for even most large +projects); so frontends that can easily obtain only the affected +paths for a commit are encouraged to do so. + +`notemodify` +^^^^^^^^^^^^ +Included in a `commit` `<notes_ref>` command to add a new note +annotating a `<commit-ish>` or change this annotation contents. +Internally it is similar to filemodify 100644 on `<commit-ish>` +path (maybe split into subdirectories). It's not advised to +use any other commands to write to the `<notes_ref>` tree except +`filedeleteall` to delete all existing notes in this tree. +This command has two different means of specifying the content +of the note. + +External data format:: + The data content for the note was already supplied by a prior + `blob` command. The frontend just needs to connect it to the + commit that is to be annotated. ++ +.... + 'N' SP <dataref> SP <commit-ish> LF +.... ++ +Here `<dataref>` can be either a mark reference (`:<idnum>`) +set by a prior `blob` command, or a full 40-byte SHA-1 of an +existing Git blob object. + +Inline data format:: + The data content for the note has not been supplied yet. + The frontend wants to supply it as part of this modify + command. ++ +.... + 'N' SP 'inline' SP <commit-ish> LF + data +.... ++ +See below for a detailed description of the `data` command. + +In both formats `<commit-ish>` is any of the commit specification +expressions also accepted by `from` (see above). + +`mark` +~~~~~~ +Arranges for fast-import to save a reference to the current object, allowing +the frontend to recall this object at a future point in time, without +knowing its SHA-1. Here the current object is the object creation +command the `mark` command appears within. This can be `commit`, +`tag`, and `blob`, but `commit` is the most common usage. + +.... + 'mark' SP ':' <idnum> LF +.... + +where `<idnum>` is the number assigned by the frontend to this mark. +The value of `<idnum>` is expressed as an ASCII decimal integer. +The value 0 is reserved and cannot be used as +a mark. Only values greater than or equal to 1 may be used as marks. + +New marks are created automatically. Existing marks can be moved +to another object simply by reusing the same `<idnum>` in another +`mark` command. + +`tag` +~~~~~ +Creates an annotated tag referring to a specific commit. To create +lightweight (non-annotated) tags see the `reset` command below. + +.... + 'tag' SP <name> LF + 'from' SP <commit-ish> LF + 'tagger' (SP <name>)? SP LT <email> GT SP <when> LF + data +.... + +where `<name>` is the name of the tag to create. + +Tag names are automatically prefixed with `refs/tags/` when stored +in Git, so importing the CVS branch symbol `RELENG-1_0-FINAL` would +use just `RELENG-1_0-FINAL` for `<name>`, and fast-import will write the +corresponding ref as `refs/tags/RELENG-1_0-FINAL`. + +The value of `<name>` must be a valid refname in Git and therefore +may contain forward slashes. As `LF` is not valid in a Git refname, +no quoting or escaping syntax is supported here. + +The `from` command is the same as in the `commit` command; see +above for details. + +The `tagger` command uses the same format as `committer` within +`commit`; again see above for details. + +The `data` command following `tagger` must supply the annotated tag +message (see below for `data` command syntax). To import an empty +tag message use a 0 length data. Tag messages are free-form and are +not interpreted by Git. Currently they must be encoded in UTF-8, +as fast-import does not permit other encodings to be specified. + +Signing annotated tags during import from within fast-import is not +supported. Trying to include your own PGP/GPG signature is not +recommended, as the frontend does not (easily) have access to the +complete set of bytes which normally goes into such a signature. +If signing is required, create lightweight tags from within fast-import with +`reset`, then create the annotated versions of those tags offline +with the standard 'git tag' process. + +`reset` +~~~~~~~ +Creates (or recreates) the named branch, optionally starting from +a specific revision. The reset command allows a frontend to issue +a new `from` command for an existing branch, or to create a new +branch from an existing commit without creating a new commit. + +.... + 'reset' SP <ref> LF + ('from' SP <commit-ish> LF)? + LF? +.... + +For a detailed description of `<ref>` and `<commit-ish>` see above +under `commit` and `from`. + +The `LF` after the command is optional (it used to be required). + +The `reset` command can also be used to create lightweight +(non-annotated) tags. For example: + +==== + reset refs/tags/938 + from :938 +==== + +would create the lightweight tag `refs/tags/938` referring to +whatever commit mark `:938` references. + +`blob` +~~~~~~ +Requests writing one file revision to the packfile. The revision +is not connected to any commit; this connection must be formed in +a subsequent `commit` command by referencing the blob through an +assigned mark. + +.... + 'blob' LF + mark? + data +.... + +The mark command is optional here as some frontends have chosen +to generate the Git SHA-1 for the blob on their own, and feed that +directly to `commit`. This is typically more work than it's worth +however, as marks are inexpensive to store and easy to use. + +`data` +~~~~~~ +Supplies raw data (for use as blob/file content, commit messages, or +annotated tag messages) to fast-import. Data can be supplied using an exact +byte count or delimited with a terminating line. Real frontends +intended for production-quality conversions should always use the +exact byte count format, as it is more robust and performs better. +The delimited format is intended primarily for testing fast-import. + +Comment lines appearing within the `<raw>` part of `data` commands +are always taken to be part of the body of the data and are therefore +never ignored by fast-import. This makes it safe to import any +file/message content whose lines might start with `#`. + +Exact byte count format:: + The frontend must specify the number of bytes of data. ++ +.... + 'data' SP <count> LF + <raw> LF? +.... ++ +where `<count>` is the exact number of bytes appearing within +`<raw>`. The value of `<count>` is expressed as an ASCII decimal +integer. The `LF` on either side of `<raw>` is not +included in `<count>` and will not be included in the imported data. ++ +The `LF` after `<raw>` is optional (it used to be required) but +recommended. Always including it makes debugging a fast-import +stream easier as the next command always starts in column 0 +of the next line, even if `<raw>` did not end with an `LF`. + +Delimited format:: + A delimiter string is used to mark the end of the data. + fast-import will compute the length by searching for the delimiter. + This format is primarily useful for testing and is not + recommended for real data. ++ +.... + 'data' SP '<<' <delim> LF + <raw> LF + <delim> LF + LF? +.... ++ +where `<delim>` is the chosen delimiter string. The string `<delim>` +must not appear on a line by itself within `<raw>`, as otherwise +fast-import will think the data ends earlier than it really does. The `LF` +immediately trailing `<raw>` is part of `<raw>`. This is one of +the limitations of the delimited format, it is impossible to supply +a data chunk which does not have an LF as its last byte. ++ +The `LF` after `<delim> LF` is optional (it used to be required). + +`checkpoint` +~~~~~~~~~~~~ +Forces fast-import to close the current packfile, start a new one, and to +save out all current branch refs, tags and marks. + +.... + 'checkpoint' LF + LF? +.... + +Note that fast-import automatically switches packfiles when the current +packfile reaches --max-pack-size, or 4 GiB, whichever limit is +smaller. During an automatic packfile switch fast-import does not update +the branch refs, tags or marks. + +As a `checkpoint` can require a significant amount of CPU time and +disk IO (to compute the overall pack SHA-1 checksum, generate the +corresponding index file, and update the refs) it can easily take +several minutes for a single `checkpoint` command to complete. + +Frontends may choose to issue checkpoints during extremely large +and long running imports, or when they need to allow another Git +process access to a branch. However given that a 30 GiB Subversion +repository can be loaded into Git through fast-import in about 3 hours, +explicit checkpointing may not be necessary. + +The `LF` after the command is optional (it used to be required). + +`progress` +~~~~~~~~~~ +Causes fast-import to print the entire `progress` line unmodified to +its standard output channel (file descriptor 1) when the command is +processed from the input stream. The command otherwise has no impact +on the current import, or on any of fast-import's internal state. + +.... + 'progress' SP <any> LF + LF? +.... + +The `<any>` part of the command may contain any sequence of bytes +that does not contain `LF`. The `LF` after the command is optional. +Callers may wish to process the output through a tool such as sed to +remove the leading part of the line, for example: + +==== + frontend | git fast-import | sed 's/^progress //' +==== + +Placing a `progress` command immediately after a `checkpoint` will +inform the reader when the `checkpoint` has been completed and it +can safely access the refs that fast-import updated. + +`get-mark` +~~~~~~~~~~ +Causes fast-import to print the SHA-1 corresponding to a mark to +stdout or to the file descriptor previously arranged with the +`--cat-blob-fd` argument. The command otherwise has no impact on the +current import; its purpose is to retrieve SHA-1s that later commits +might want to refer to in their commit messages. + +.... + 'get-mark' SP ':' <idnum> LF +.... + +This command can be used anywhere in the stream that comments are +accepted. In particular, the `get-mark` command can be used in the +middle of a commit but not in the middle of a `data` command. + +See ``Responses To Commands'' below for details about how to read +this output safely. + +`cat-blob` +~~~~~~~~~~ +Causes fast-import to print a blob to a file descriptor previously +arranged with the `--cat-blob-fd` argument. The command otherwise +has no impact on the current import; its main purpose is to +retrieve blobs that may be in fast-import's memory but not +accessible from the target repository. + +.... + 'cat-blob' SP <dataref> LF +.... + +The `<dataref>` can be either a mark reference (`:<idnum>`) +set previously or a full 40-byte SHA-1 of a Git blob, preexisting or +ready to be written. + +Output uses the same format as `git cat-file --batch`: + +==== + <sha1> SP 'blob' SP <size> LF + <contents> LF +==== + +This command can be used anywhere in the stream that comments are +accepted. In particular, the `cat-blob` command can be used in the +middle of a commit but not in the middle of a `data` command. + +See ``Responses To Commands'' below for details about how to read +this output safely. + +`ls` +~~~~ +Prints information about the object at a path to a file descriptor +previously arranged with the `--cat-blob-fd` argument. This allows +printing a blob from the active commit (with `cat-blob`) or copying a +blob or tree from a previous commit for use in the current one (with +`filemodify`). + +The `ls` command can be used anywhere in the stream that comments are +accepted, including the middle of a commit. + +Reading from the active commit:: + This form can only be used in the middle of a `commit`. + The path names a directory entry within fast-import's + active commit. The path must be quoted in this case. ++ +.... + 'ls' SP <path> LF +.... + +Reading from a named tree:: + The `<dataref>` can be a mark reference (`:<idnum>`) or the + full 40-byte SHA-1 of a Git tag, commit, or tree object, + preexisting or waiting to be written. + The path is relative to the top level of the tree + named by `<dataref>`. ++ +.... + 'ls' SP <dataref> SP <path> LF +.... + +See `filemodify` above for a detailed description of `<path>`. + +Output uses the same format as `git ls-tree <tree> -- <path>`: + +==== + <mode> SP ('blob' | 'tree' | 'commit') SP <dataref> HT <path> LF +==== + +The <dataref> represents the blob, tree, or commit object at <path> +and can be used in later 'get-mark', 'cat-blob', 'filemodify', or +'ls' commands. + +If there is no file or subtree at that path, 'git fast-import' will +instead report + +==== + missing SP <path> LF +==== + +See ``Responses To Commands'' below for details about how to read +this output safely. + +`feature` +~~~~~~~~~ +Require that fast-import supports the specified feature, or abort if +it does not. + +.... + 'feature' SP <feature> ('=' <argument>)? LF +.... + +The <feature> part of the command may be any one of the following: + +date-format:: +export-marks:: +relative-marks:: +no-relative-marks:: +force:: + Act as though the corresponding command-line option with + a leading '--' was passed on the command line + (see OPTIONS, above). + +import-marks:: +import-marks-if-exists:: + Like --import-marks except in two respects: first, only one + "feature import-marks" or "feature import-marks-if-exists" + command is allowed per stream; second, an --import-marks= + or --import-marks-if-exists command-line option overrides + any of these "feature" commands in the stream; third, + "feature import-marks-if-exists" like a corresponding + command-line option silently skips a nonexistent file. + +get-mark:: +cat-blob:: +ls:: + Require that the backend support the 'get-mark', 'cat-blob', + or 'ls' command respectively. + Versions of fast-import not supporting the specified command + will exit with a message indicating so. + This lets the import error out early with a clear message, + rather than wasting time on the early part of an import + before the unsupported command is detected. + +notes:: + Require that the backend support the 'notemodify' (N) + subcommand to the 'commit' command. + Versions of fast-import not supporting notes will exit + with a message indicating so. + +done:: + Error out if the stream ends without a 'done' command. + Without this feature, errors causing the frontend to end + abruptly at a convenient point in the stream can go + undetected. This may occur, for example, if an import + front end dies in mid-operation without emitting SIGTERM + or SIGKILL at its subordinate git fast-import instance. + +`option` +~~~~~~~~ +Processes the specified option so that git fast-import behaves in a +way that suits the frontend's needs. +Note that options specified by the frontend are overridden by any +options the user may specify to git fast-import itself. + +.... + 'option' SP <option> LF +.... + +The `<option>` part of the command may contain any of the options +listed in the OPTIONS section that do not change import semantics, +without the leading '--' and is treated in the same way. + +Option commands must be the first commands on the input (not counting +feature commands), to give an option command after any non-option +command is an error. + +The following command-line options change import semantics and may therefore +not be passed as option: + +* date-format +* import-marks +* export-marks +* cat-blob-fd +* force + +`done` +~~~~~~ +If the `done` feature is not in use, treated as if EOF was read. +This can be used to tell fast-import to finish early. + +If the `--done` command-line option or `feature done` command is +in use, the `done` command is mandatory and marks the end of the +stream. + +Responses To Commands +--------------------- +New objects written by fast-import are not available immediately. +Most fast-import commands have no visible effect until the next +checkpoint (or completion). The frontend can send commands to +fill fast-import's input pipe without worrying about how quickly +they will take effect, which improves performance by simplifying +scheduling. + +For some frontends, though, it is useful to be able to read back +data from the current repository as it is being updated (for +example when the source material describes objects in terms of +patches to be applied to previously imported objects). This can +be accomplished by connecting the frontend and fast-import via +bidirectional pipes: + +==== + mkfifo fast-import-output + frontend <fast-import-output | + git fast-import >fast-import-output +==== + +A frontend set up this way can use `progress`, `get-mark`, `ls`, and +`cat-blob` commands to read information from the import in progress. + +To avoid deadlock, such frontends must completely consume any +pending output from `progress`, `ls`, `get-mark`, and `cat-blob` before +performing writes to fast-import that might block. + +Crash Reports +------------- +If fast-import is supplied invalid input it will terminate with a +non-zero exit status and create a crash report in the top level of +the Git repository it was importing into. Crash reports contain +a snapshot of the internal fast-import state as well as the most +recent commands that lead up to the crash. + +All recent commands (including stream comments, file changes and +progress commands) are shown in the command history within the crash +report, but raw file data and commit messages are excluded from the +crash report. This exclusion saves space within the report file +and reduces the amount of buffering that fast-import must perform +during execution. + +After writing a crash report fast-import will close the current +packfile and export the marks table. This allows the frontend +developer to inspect the repository state and resume the import from +the point where it crashed. The modified branches and tags are not +updated during a crash, as the import did not complete successfully. +Branch and tag information can be found in the crash report and +must be applied manually if the update is needed. + +An example crash: + +==== + $ cat >in <<END_OF_INPUT + # my very first test commit + commit refs/heads/master + committer Shawn O. Pearce <spearce> 19283 -0400 + # who is that guy anyway? + data <<EOF + this is my commit + EOF + M 644 inline .gitignore + data <<EOF + .gitignore + EOF + M 777 inline bob + END_OF_INPUT + + $ git fast-import <in + fatal: Corrupt mode: M 777 inline bob + fast-import: dumping crash report to .git/fast_import_crash_8434 + + $ cat .git/fast_import_crash_8434 + fast-import crash report: + fast-import process: 8434 + parent process : 1391 + at Sat Sep 1 00:58:12 2007 + + fatal: Corrupt mode: M 777 inline bob + + Most Recent Commands Before Crash + --------------------------------- + # my very first test commit + commit refs/heads/master + committer Shawn O. Pearce <spearce> 19283 -0400 + # who is that guy anyway? + data <<EOF + M 644 inline .gitignore + data <<EOF + * M 777 inline bob + + Active Branch LRU + ----------------- + active_branches = 1 cur, 5 max + + pos clock name + ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ + 1) 0 refs/heads/master + + Inactive Branches + ----------------- + refs/heads/master: + status : active loaded dirty + tip commit : 0000000000000000000000000000000000000000 + old tree : 0000000000000000000000000000000000000000 + cur tree : 0000000000000000000000000000000000000000 + commit clock: 0 + last pack : + + + ------------------- + END OF CRASH REPORT +==== + +Tips and Tricks +--------------- +The following tips and tricks have been collected from various +users of fast-import, and are offered here as suggestions. + +Use One Mark Per Commit +~~~~~~~~~~~~~~~~~~~~~~~ +When doing a repository conversion, use a unique mark per commit +(`mark :<n>`) and supply the --export-marks option on the command +line. fast-import will dump a file which lists every mark and the Git +object SHA-1 that corresponds to it. If the frontend can tie +the marks back to the source repository, it is easy to verify the +accuracy and completeness of the import by comparing each Git +commit to the corresponding source revision. + +Coming from a system such as Perforce or Subversion this should be +quite simple, as the fast-import mark can also be the Perforce changeset +number or the Subversion revision number. + +Freely Skip Around Branches +~~~~~~~~~~~~~~~~~~~~~~~~~~~ +Don't bother trying to optimize the frontend to stick to one branch +at a time during an import. Although doing so might be slightly +faster for fast-import, it tends to increase the complexity of the frontend +code considerably. + +The branch LRU builtin to fast-import tends to behave very well, and the +cost of activating an inactive branch is so low that bouncing around +between branches has virtually no impact on import performance. + +Handling Renames +~~~~~~~~~~~~~~~~ +When importing a renamed file or directory, simply delete the old +name(s) and modify the new name(s) during the corresponding commit. +Git performs rename detection after-the-fact, rather than explicitly +during a commit. + +Use Tag Fixup Branches +~~~~~~~~~~~~~~~~~~~~~~ +Some other SCM systems let the user create a tag from multiple +files which are not from the same commit/changeset. Or to create +tags which are a subset of the files available in the repository. + +Importing these tags as-is in Git is impossible without making at +least one commit which ``fixes up'' the files to match the content +of the tag. Use fast-import's `reset` command to reset a dummy branch +outside of your normal branch space to the base commit for the tag, +then commit one or more file fixup commits, and finally tag the +dummy branch. + +For example since all normal branches are stored under `refs/heads/` +name the tag fixup branch `TAG_FIXUP`. This way it is impossible for +the fixup branch used by the importer to have namespace conflicts +with real branches imported from the source (the name `TAG_FIXUP` +is not `refs/heads/TAG_FIXUP`). + +When committing fixups, consider using `merge` to connect the +commit(s) which are supplying file revisions to the fixup branch. +Doing so will allow tools such as 'git blame' to track +through the real commit history and properly annotate the source +files. + +After fast-import terminates the frontend will need to do `rm .git/TAG_FIXUP` +to remove the dummy branch. + +Import Now, Repack Later +~~~~~~~~~~~~~~~~~~~~~~~~ +As soon as fast-import completes the Git repository is completely valid +and ready for use. Typically this takes only a very short time, +even for considerably large projects (100,000+ commits). + +However repacking the repository is necessary to improve data +locality and access performance. It can also take hours on extremely +large projects (especially if -f and a large --window parameter is +used). Since repacking is safe to run alongside readers and writers, +run the repack in the background and let it finish when it finishes. +There is no reason to wait to explore your new Git project! + +If you choose to wait for the repack, don't try to run benchmarks +or performance tests until repacking is completed. fast-import outputs +suboptimal packfiles that are simply never seen in real use +situations. + +Repacking Historical Data +~~~~~~~~~~~~~~~~~~~~~~~~~ +If you are repacking very old imported data (e.g. older than the +last year), consider expending some extra CPU time and supplying +--window=50 (or higher) when you run 'git repack'. +This will take longer, but will also produce a smaller packfile. +You only need to expend the effort once, and everyone using your +project will benefit from the smaller repository. + +Include Some Progress Messages +~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ +Every once in a while have your frontend emit a `progress` message +to fast-import. The contents of the messages are entirely free-form, +so one suggestion would be to output the current month and year +each time the current commit date moves into the next month. +Your users will feel better knowing how much of the data stream +has been processed. + + +Packfile Optimization +--------------------- +When packing a blob fast-import always attempts to deltify against the last +blob written. Unless specifically arranged for by the frontend, +this will probably not be a prior version of the same file, so the +generated delta will not be the smallest possible. The resulting +packfile will be compressed, but will not be optimal. + +Frontends which have efficient access to all revisions of a +single file (for example reading an RCS/CVS ,v file) can choose +to supply all revisions of that file as a sequence of consecutive +`blob` commands. This allows fast-import to deltify the different file +revisions against each other, saving space in the final packfile. +Marks can be used to later identify individual file revisions during +a sequence of `commit` commands. + +The packfile(s) created by fast-import do not encourage good disk access +patterns. This is caused by fast-import writing the data in the order +it is received on standard input, while Git typically organizes +data within packfiles to make the most recent (current tip) data +appear before historical data. Git also clusters commits together, +speeding up revision traversal through better cache locality. + +For this reason it is strongly recommended that users repack the +repository with `git repack -a -d` after fast-import completes, allowing +Git to reorganize the packfiles for faster data access. If blob +deltas are suboptimal (see above) then also adding the `-f` option +to force recomputation of all deltas can significantly reduce the +final packfile size (30-50% smaller can be quite typical). + + +Memory Utilization +------------------ +There are a number of factors which affect how much memory fast-import +requires to perform an import. Like critical sections of core +Git, fast-import uses its own memory allocators to amortize any overheads +associated with malloc. In practice fast-import tends to amortize any +malloc overheads to 0, due to its use of large block allocations. + +per object +~~~~~~~~~~ +fast-import maintains an in-memory structure for every object written in +this execution. On a 32 bit system the structure is 32 bytes, +on a 64 bit system the structure is 40 bytes (due to the larger +pointer sizes). Objects in the table are not deallocated until +fast-import terminates. Importing 2 million objects on a 32 bit system +will require approximately 64 MiB of memory. + +The object table is actually a hashtable keyed on the object name +(the unique SHA-1). This storage configuration allows fast-import to reuse +an existing or already written object and avoid writing duplicates +to the output packfile. Duplicate blobs are surprisingly common +in an import, typically due to branch merges in the source. + +per mark +~~~~~~~~ +Marks are stored in a sparse array, using 1 pointer (4 bytes or 8 +bytes, depending on pointer size) per mark. Although the array +is sparse, frontends are still strongly encouraged to use marks +between 1 and n, where n is the total number of marks required for +this import. + +per branch +~~~~~~~~~~ +Branches are classified as active and inactive. The memory usage +of the two classes is significantly different. + +Inactive branches are stored in a structure which uses 96 or 120 +bytes (32 bit or 64 bit systems, respectively), plus the length of +the branch name (typically under 200 bytes), per branch. fast-import will +easily handle as many as 10,000 inactive branches in under 2 MiB +of memory. + +Active branches have the same overhead as inactive branches, but +also contain copies of every tree that has been recently modified on +that branch. If subtree `include` has not been modified since the +branch became active, its contents will not be loaded into memory, +but if subtree `src` has been modified by a commit since the branch +became active, then its contents will be loaded in memory. + +As active branches store metadata about the files contained on that +branch, their in-memory storage size can grow to a considerable size +(see below). + +fast-import automatically moves active branches to inactive status based on +a simple least-recently-used algorithm. The LRU chain is updated on +each `commit` command. The maximum number of active branches can be +increased or decreased on the command line with --active-branches=. + +per active tree +~~~~~~~~~~~~~~~ +Trees (aka directories) use just 12 bytes of memory on top of the +memory required for their entries (see ``per active file'' below). +The cost of a tree is virtually 0, as its overhead amortizes out +over the individual file entries. + +per active file entry +~~~~~~~~~~~~~~~~~~~~~ +Files (and pointers to subtrees) within active trees require 52 or 64 +bytes (32/64 bit platforms) per entry. To conserve space, file and +tree names are pooled in a common string table, allowing the filename +``Makefile'' to use just 16 bytes (after including the string header +overhead) no matter how many times it occurs within the project. + +The active branch LRU, when coupled with the filename string pool +and lazy loading of subtrees, allows fast-import to efficiently import +projects with 2,000+ branches and 45,114+ files in a very limited +memory footprint (less than 2.7 MiB per active branch). + +Signals +------- +Sending *SIGUSR1* to the 'git fast-import' process ends the current +packfile early, simulating a `checkpoint` command. The impatient +operator can use this facility to peek at the objects and refs from an +import in progress, at the cost of some added running time and worse +compression. + +SEE ALSO +-------- +linkgit:git-fast-export[1] + +GIT +--- +Part of the linkgit:git[1] suite diff --git a/Documentation/git-fetch-pack.txt b/Documentation/git-fetch-pack.txt new file mode 100644 index 0000000..239623c --- /dev/null +++ b/Documentation/git-fetch-pack.txt @@ -0,0 +1,118 @@ +git-fetch-pack(1) +================= + +NAME +---- +git-fetch-pack - Receive missing objects from another repository + + +SYNOPSIS +-------- +[verse] +'git fetch-pack' [--all] [--quiet|-q] [--keep|-k] [--thin] [--include-tag] + [--upload-pack=<git-upload-pack>] + [--depth=<n>] [--no-progress] + [-v] <repository> [<refs>...] + +DESCRIPTION +----------- +Usually you would want to use 'git fetch', which is a +higher level wrapper of this command, instead. + +Invokes 'git-upload-pack' on a possibly remote repository +and asks it to send objects missing from this repository, to +update the named heads. The list of commits available locally +is found out by scanning the local refs/ hierarchy and sent to +'git-upload-pack' running on the other end. + +This command degenerates to download everything to complete the +asked refs from the remote side when the local side does not +have a common ancestor commit. + + +OPTIONS +------- +--all:: + Fetch all remote refs. + +--stdin:: + Take the list of refs from stdin, one per line. If there + are refs specified on the command line in addition to this + option, then the refs from stdin are processed after those + on the command line. ++ +If '--stateless-rpc' is specified together with this option then +the list of refs must be in packet format (pkt-line). Each ref must +be in a separate packet, and the list must end with a flush packet. + +-q:: +--quiet:: + Pass '-q' flag to 'git unpack-objects'; this makes the + cloning process less verbose. + +-k:: +--keep:: + Do not invoke 'git unpack-objects' on received data, but + create a single packfile out of it instead, and store it + in the object database. If provided twice then the pack is + locked against repacking. + +--thin:: + Fetch a "thin" pack, which records objects in deltified form based + on objects not included in the pack to reduce network traffic. + +--include-tag:: + If the remote side supports it, annotated tags objects will + be downloaded on the same connection as the other objects if + the object the tag references is downloaded. The caller must + otherwise determine the tags this option made available. + +--upload-pack=<git-upload-pack>:: + Use this to specify the path to 'git-upload-pack' on the + remote side, if is not found on your $PATH. + Installations of sshd ignores the user's environment + setup scripts for login shells (e.g. .bash_profile) and + your privately installed git may not be found on the system + default $PATH. Another workaround suggested is to set + up your $PATH in ".bashrc", but this flag is for people + who do not want to pay the overhead for non-interactive + shells by having a lean .bashrc file (they set most of + the things up in .bash_profile). + +--exec=<git-upload-pack>:: + Same as --upload-pack=<git-upload-pack>. + +--depth=<n>:: + Limit fetching to ancestor-chains not longer than n. + 'git-upload-pack' treats the special depth 2147483647 as + infinite even if there is an ancestor-chain that long. + +--no-progress:: + Do not show the progress. + +--check-self-contained-and-connected:: + Output "connectivity-ok" if the received pack is + self-contained and connected. + +-v:: + Run verbosely. + +<repository>:: + The URL to the remote repository. + +<refs>...:: + The remote heads to update from. This is relative to + $GIT_DIR (e.g. "HEAD", "refs/heads/master"). When + unspecified, update from all heads the remote side has. ++ +If the remote has enabled the options `uploadpack.allowTipSHA1InWant` or +`uploadpack.allowReachableSHA1InWant`, they may alternatively be 40-hex +sha1s present on the remote. + +SEE ALSO +-------- +linkgit:git-fetch[1] + +GIT +--- +Part of the linkgit:git[1] suite diff --git a/Documentation/git-fetch.txt b/Documentation/git-fetch.txt new file mode 100644 index 0000000..efe56e0 --- /dev/null +++ b/Documentation/git-fetch.txt @@ -0,0 +1,159 @@ +git-fetch(1) +============ + +NAME +---- +git-fetch - Download objects and refs from another repository + + +SYNOPSIS +-------- +[verse] +'git fetch' [<options>] [<repository> [<refspec>...]] +'git fetch' [<options>] <group> +'git fetch' --multiple [<options>] [(<repository> | <group>)...] +'git fetch' --all [<options>] + + +DESCRIPTION +----------- +Fetch branches and/or tags (collectively, "refs") from one or more +other repositories, along with the objects necessary to complete their +histories. Remote-tracking branches are updated (see the description +of <refspec> below for ways to control this behavior). + +By default, any tag that points into the histories being fetched is +also fetched; the effect is to fetch tags that +point at branches that you are interested in. This default behavior +can be changed by using the --tags or --no-tags options or by +configuring remote.<name>.tagOpt. By using a refspec that fetches tags +explicitly, you can fetch tags that do not point into branches you +are interested in as well. + +'git fetch' can fetch from either a single named repository or URL, +or from several repositories at once if <group> is given and +there is a remotes.<group> entry in the configuration file. +(See linkgit:git-config[1]). + +When no remote is specified, by default the `origin` remote will be used, +unless there's an upstream branch configured for the current branch. + +The names of refs that are fetched, together with the object names +they point at, are written to `.git/FETCH_HEAD`. This information +may be used by scripts or other git commands, such as linkgit:git-pull[1]. + +OPTIONS +------- +include::fetch-options.txt[] + +include::pull-fetch-param.txt[] + +include::urls-remotes.txt[] + + +CONFIGURED REMOTE-TRACKING BRANCHES[[CRTB]] +------------------------------------------- + +You often interact with the same remote repository by +regularly and repeatedly fetching from it. In order to keep track +of the progress of such a remote repository, `git fetch` allows you +to configure `remote.<repository>.fetch` configuration variables. + +Typically such a variable may look like this: + +------------------------------------------------ +[remote "origin"] + fetch = +refs/heads/*:refs/remotes/origin/* +------------------------------------------------ + +This configuration is used in two ways: + +* When `git fetch` is run without specifying what branches + and/or tags to fetch on the command line, e.g. `git fetch origin` + or `git fetch`, `remote.<repository>.fetch` values are used as + the refspecs--they specify which refs to fetch and which local refs + to update. The example above will fetch + all branches that exist in the `origin` (i.e. any ref that matches + the left-hand side of the value, `refs/heads/*`) and update the + corresponding remote-tracking branches in the `refs/remotes/origin/*` + hierarchy. + +* When `git fetch` is run with explicit branches and/or tags + to fetch on the command line, e.g. `git fetch origin master`, the + <refspec>s given on the command line determine what are to be + fetched (e.g. `master` in the example, + which is a short-hand for `master:`, which in turn means + "fetch the 'master' branch but I do not explicitly say what + remote-tracking branch to update with it from the command line"), + and the example command will + fetch _only_ the 'master' branch. The `remote.<repository>.fetch` + values determine which + remote-tracking branch, if any, is updated. When used in this + way, the `remote.<repository>.fetch` values do not have any + effect in deciding _what_ gets fetched (i.e. the values are not + used as refspecs when the command-line lists refspecs); they are + only used to decide _where_ the refs that are fetched are stored + by acting as a mapping. + +The latter use of the `remote.<repository>.fetch` values can be +overridden by giving the `--refmap=<refspec>` parameter(s) on the +command line. + + +EXAMPLES +-------- + +* Update the remote-tracking branches: ++ +------------------------------------------------ +$ git fetch origin +------------------------------------------------ ++ +The above command copies all branches from the remote refs/heads/ +namespace and stores them to the local refs/remotes/origin/ namespace, +unless the branch.<name>.fetch option is used to specify a non-default +refspec. + +* Using refspecs explicitly: ++ +------------------------------------------------ +$ git fetch origin +pu:pu maint:tmp +------------------------------------------------ ++ +This updates (or creates, as necessary) branches `pu` and `tmp` in +the local repository by fetching from the branches (respectively) +`pu` and `maint` from the remote repository. ++ +The `pu` branch will be updated even if it is does not fast-forward, +because it is prefixed with a plus sign; `tmp` will not be. + +* Peek at a remote's branch, without configuring the remote in your local +repository: ++ +------------------------------------------------ +$ git fetch git://git.kernel.org/pub/scm/git/git.git maint +$ git log FETCH_HEAD +------------------------------------------------ ++ +The first command fetches the `maint` branch from the repository at +`git://git.kernel.org/pub/scm/git/git.git` and the second command uses +`FETCH_HEAD` to examine the branch with linkgit:git-log[1]. The fetched +objects will eventually be removed by git's built-in housekeeping (see +linkgit:git-gc[1]). + +BUGS +---- +Using --recurse-submodules can only fetch new commits in already checked +out submodules right now. When e.g. upstream added a new submodule in the +just fetched commits of the superproject the submodule itself can not be +fetched, making it impossible to check out that submodule later without +having to do a fetch again. This is expected to be fixed in a future Git +version. + +SEE ALSO +-------- +linkgit:git-pull[1] + +GIT +--- +Part of the linkgit:git[1] suite diff --git a/Documentation/git-filter-branch.txt b/Documentation/git-filter-branch.txt new file mode 100644 index 0000000..003731f --- /dev/null +++ b/Documentation/git-filter-branch.txt @@ -0,0 +1,465 @@ +git-filter-branch(1) +==================== + +NAME +---- +git-filter-branch - Rewrite branches + +SYNOPSIS +-------- +[verse] +'git filter-branch' [--env-filter <command>] [--tree-filter <command>] + [--index-filter <command>] [--parent-filter <command>] + [--msg-filter <command>] [--commit-filter <command>] + [--tag-name-filter <command>] [--subdirectory-filter <directory>] + [--prune-empty] + [--original <namespace>] [-d <directory>] [-f | --force] + [--] [<rev-list options>...] + +DESCRIPTION +----------- +Lets you rewrite Git revision history by rewriting the branches mentioned +in the <rev-list options>, applying custom filters on each revision. +Those filters can modify each tree (e.g. removing a file or running +a perl rewrite on all files) or information about each commit. +Otherwise, all information (including original commit times or merge +information) will be preserved. + +The command will only rewrite the _positive_ refs mentioned in the +command line (e.g. if you pass 'a..b', only 'b' will be rewritten). +If you specify no filters, the commits will be recommitted without any +changes, which would normally have no effect. Nevertheless, this may be +useful in the future for compensating for some Git bugs or such, +therefore such a usage is permitted. + +*NOTE*: This command honors `.git/info/grafts` file and refs in +the `refs/replace/` namespace. +If you have any grafts or replacement refs defined, running this command +will make them permanent. + +*WARNING*! The rewritten history will have different object names for all +the objects and will not converge with the original branch. You will not +be able to easily push and distribute the rewritten branch on top of the +original branch. Please do not use this command if you do not know the +full implications, and avoid using it anyway, if a simple single commit +would suffice to fix your problem. (See the "RECOVERING FROM UPSTREAM +REBASE" section in linkgit:git-rebase[1] for further information about +rewriting published history.) + +Always verify that the rewritten version is correct: The original refs, +if different from the rewritten ones, will be stored in the namespace +'refs/original/'. + +Note that since this operation is very I/O expensive, it might +be a good idea to redirect the temporary directory off-disk with the +'-d' option, e.g. on tmpfs. Reportedly the speedup is very noticeable. + + +Filters +~~~~~~~ + +The filters are applied in the order as listed below. The <command> +argument is always evaluated in the shell context using the 'eval' command +(with the notable exception of the commit filter, for technical reasons). +Prior to that, the $GIT_COMMIT environment variable will be set to contain +the id of the commit being rewritten. Also, GIT_AUTHOR_NAME, +GIT_AUTHOR_EMAIL, GIT_AUTHOR_DATE, GIT_COMMITTER_NAME, GIT_COMMITTER_EMAIL, +and GIT_COMMITTER_DATE are taken from the current commit and exported to +the environment, in order to affect the author and committer identities of +the replacement commit created by linkgit:git-commit-tree[1] after the +filters have run. + +If any evaluation of <command> returns a non-zero exit status, the whole +operation will be aborted. + +A 'map' function is available that takes an "original sha1 id" argument +and outputs a "rewritten sha1 id" if the commit has been already +rewritten, and "original sha1 id" otherwise; the 'map' function can +return several ids on separate lines if your commit filter emitted +multiple commits. + + +OPTIONS +------- + +--env-filter <command>:: + This filter may be used if you only need to modify the environment + in which the commit will be performed. Specifically, you might + want to rewrite the author/committer name/email/time environment + variables (see linkgit:git-commit-tree[1] for details). Do not forget + to re-export the variables. + +--tree-filter <command>:: + This is the filter for rewriting the tree and its contents. + The argument is evaluated in shell with the working + directory set to the root of the checked out tree. The new tree + is then used as-is (new files are auto-added, disappeared files + are auto-removed - neither .gitignore files nor any other ignore + rules *HAVE ANY EFFECT*!). + +--index-filter <command>:: + This is the filter for rewriting the index. It is similar to the + tree filter but does not check out the tree, which makes it much + faster. Frequently used with `git rm --cached + --ignore-unmatch ...`, see EXAMPLES below. For hairy + cases, see linkgit:git-update-index[1]. + +--parent-filter <command>:: + This is the filter for rewriting the commit's parent list. + It will receive the parent string on stdin and shall output + the new parent string on stdout. The parent string is in + the format described in linkgit:git-commit-tree[1]: empty for + the initial commit, "-p parent" for a normal commit and + "-p parent1 -p parent2 -p parent3 ..." for a merge commit. + +--msg-filter <command>:: + This is the filter for rewriting the commit messages. + The argument is evaluated in the shell with the original + commit message on standard input; its standard output is + used as the new commit message. + +--commit-filter <command>:: + This is the filter for performing the commit. + If this filter is specified, it will be called instead of the + 'git commit-tree' command, with arguments of the form + "<TREE_ID> [(-p <PARENT_COMMIT_ID>)...]" and the log message on + stdin. The commit id is expected on stdout. ++ +As a special extension, the commit filter may emit multiple +commit ids; in that case, the rewritten children of the original commit will +have all of them as parents. ++ +You can use the 'map' convenience function in this filter, and other +convenience functions, too. For example, calling 'skip_commit "$@"' +will leave out the current commit (but not its changes! If you want +that, use 'git rebase' instead). ++ +You can also use the `git_commit_non_empty_tree "$@"` instead of +`git commit-tree "$@"` if you don't wish to keep commits with a single parent +and that makes no change to the tree. + +--tag-name-filter <command>:: + This is the filter for rewriting tag names. When passed, + it will be called for every tag ref that points to a rewritten + object (or to a tag object which points to a rewritten object). + The original tag name is passed via standard input, and the new + tag name is expected on standard output. ++ +The original tags are not deleted, but can be overwritten; +use "--tag-name-filter cat" to simply update the tags. In this +case, be very careful and make sure you have the old tags +backed up in case the conversion has run afoul. ++ +Nearly proper rewriting of tag objects is supported. If the tag has +a message attached, a new tag object will be created with the same message, +author, and timestamp. If the tag has a signature attached, the +signature will be stripped. It is by definition impossible to preserve +signatures. The reason this is "nearly" proper, is because ideally if +the tag did not change (points to the same object, has the same name, etc.) +it should retain any signature. That is not the case, signatures will always +be removed, buyer beware. There is also no support for changing the +author or timestamp (or the tag message for that matter). Tags which point +to other tags will be rewritten to point to the underlying commit. + +--subdirectory-filter <directory>:: + Only look at the history which touches the given subdirectory. + The result will contain that directory (and only that) as its + project root. Implies <<Remap_to_ancestor>>. + +--prune-empty:: + Some kind of filters will generate empty commits, that left the tree + untouched. This switch allow git-filter-branch to ignore such + commits. Though, this switch only applies for commits that have one + and only one parent, it will hence keep merges points. Also, this + option is not compatible with the use of '--commit-filter'. Though you + just need to use the function 'git_commit_non_empty_tree "$@"' instead + of the `git commit-tree "$@"` idiom in your commit filter to make that + happen. + +--original <namespace>:: + Use this option to set the namespace where the original commits + will be stored. The default value is 'refs/original'. + +-d <directory>:: + Use this option to set the path to the temporary directory used for + rewriting. When applying a tree filter, the command needs to + temporarily check out the tree to some directory, which may consume + considerable space in case of large projects. By default it + does this in the '.git-rewrite/' directory but you can override + that choice by this parameter. + +-f:: +--force:: + 'git filter-branch' refuses to start with an existing temporary + directory or when there are already refs starting with + 'refs/original/', unless forced. + +<rev-list options>...:: + Arguments for 'git rev-list'. All positive refs included by + these options are rewritten. You may also specify options + such as '--all', but you must use '--' to separate them from + the 'git filter-branch' options. Implies <<Remap_to_ancestor>>. + + +[[Remap_to_ancestor]] +Remap to ancestor +~~~~~~~~~~~~~~~~~ + +By using linkgit:git-rev-list[1] arguments, e.g., path limiters, you can limit the +set of revisions which get rewritten. However, positive refs on the command +line are distinguished: we don't let them be excluded by such limiters. For +this purpose, they are instead rewritten to point at the nearest ancestor that +was not excluded. + + +Examples +-------- + +Suppose you want to remove a file (containing confidential information +or copyright violation) from all commits: + +------------------------------------------------------- +git filter-branch --tree-filter 'rm filename' HEAD +------------------------------------------------------- + +However, if the file is absent from the tree of some commit, +a simple `rm filename` will fail for that tree and commit. +Thus you may instead want to use `rm -f filename` as the script. + +Using `--index-filter` with 'git rm' yields a significantly faster +version. Like with using `rm filename`, `git rm --cached filename` +will fail if the file is absent from the tree of a commit. If you +want to "completely forget" a file, it does not matter when it entered +history, so we also add `--ignore-unmatch`: + +-------------------------------------------------------------------------- +git filter-branch --index-filter 'git rm --cached --ignore-unmatch filename' HEAD +-------------------------------------------------------------------------- + +Now, you will get the rewritten history saved in HEAD. + +To rewrite the repository to look as if `foodir/` had been its project +root, and discard all other history: + +------------------------------------------------------- +git filter-branch --subdirectory-filter foodir -- --all +------------------------------------------------------- + +Thus you can, e.g., turn a library subdirectory into a repository of +its own. Note the `--` that separates 'filter-branch' options from +revision options, and the `--all` to rewrite all branches and tags. + +To set a commit (which typically is at the tip of another +history) to be the parent of the current initial commit, in +order to paste the other history behind the current history: + +------------------------------------------------------------------- +git filter-branch --parent-filter 'sed "s/^\$/-p <graft-id>/"' HEAD +------------------------------------------------------------------- + +(if the parent string is empty - which happens when we are dealing with +the initial commit - add graftcommit as a parent). Note that this assumes +history with a single root (that is, no merge without common ancestors +happened). If this is not the case, use: + +-------------------------------------------------------------------------- +git filter-branch --parent-filter \ + 'test $GIT_COMMIT = <commit-id> && echo "-p <graft-id>" || cat' HEAD +-------------------------------------------------------------------------- + +or even simpler: + +----------------------------------------------- +echo "$commit-id $graft-id" >> .git/info/grafts +git filter-branch $graft-id..HEAD +----------------------------------------------- + +To remove commits authored by "Darl McBribe" from the history: + +------------------------------------------------------------------------------ +git filter-branch --commit-filter ' + if [ "$GIT_AUTHOR_NAME" = "Darl McBribe" ]; + then + skip_commit "$@"; + else + git commit-tree "$@"; + fi' HEAD +------------------------------------------------------------------------------ + +The function 'skip_commit' is defined as follows: + +-------------------------- +skip_commit() +{ + shift; + while [ -n "$1" ]; + do + shift; + map "$1"; + shift; + done; +} +-------------------------- + +The shift magic first throws away the tree id and then the -p +parameters. Note that this handles merges properly! In case Darl +committed a merge between P1 and P2, it will be propagated properly +and all children of the merge will become merge commits with P1,P2 +as their parents instead of the merge commit. + +*NOTE* the changes introduced by the commits, and which are not reverted +by subsequent commits, will still be in the rewritten branch. If you want +to throw out _changes_ together with the commits, you should use the +interactive mode of 'git rebase'. + +You can rewrite the commit log messages using `--msg-filter`. For +example, 'git svn-id' strings in a repository created by 'git svn' can +be removed this way: + +------------------------------------------------------- +git filter-branch --msg-filter ' + sed -e "/^git-svn-id:/d" +' +------------------------------------------------------- + +If you need to add 'Acked-by' lines to, say, the last 10 commits (none +of which is a merge), use this command: + +-------------------------------------------------------- +git filter-branch --msg-filter ' + cat && + echo "Acked-by: Bugs Bunny <bunny@bugzilla.org>" +' HEAD~10..HEAD +-------------------------------------------------------- + +The `--env-filter` option can be used to modify committer and/or author +identity. For example, if you found out that your commits have the wrong +identity due to a misconfigured user.email, you can make a correction, +before publishing the project, like this: + +-------------------------------------------------------- +git filter-branch --env-filter ' + if test "$GIT_AUTHOR_EMAIL" = "root@localhost" + then + GIT_AUTHOR_EMAIL=john@example.com + export GIT_AUTHOR_EMAIL + fi + if test "$GIT_COMMITTER_EMAIL" = "root@localhost" + then + GIT_COMMITTER_EMAIL=john@example.com + export GIT_COMMITTER_EMAIL + fi +' -- --all +-------------------------------------------------------- + +To restrict rewriting to only part of the history, specify a revision +range in addition to the new branch name. The new branch name will +point to the top-most revision that a 'git rev-list' of this range +will print. + +Consider this history: + +------------------ + D--E--F--G--H + / / +A--B-----C +------------------ + +To rewrite only commits D,E,F,G,H, but leave A, B and C alone, use: + +-------------------------------- +git filter-branch ... C..H +-------------------------------- + +To rewrite commits E,F,G,H, use one of these: + +---------------------------------------- +git filter-branch ... C..H --not D +git filter-branch ... D..H --not C +---------------------------------------- + +To move the whole tree into a subdirectory, or remove it from there: + +--------------------------------------------------------------- +git filter-branch --index-filter \ + 'git ls-files -s | sed "s-\t\"*-&newsubdir/-" | + GIT_INDEX_FILE=$GIT_INDEX_FILE.new \ + git update-index --index-info && + mv "$GIT_INDEX_FILE.new" "$GIT_INDEX_FILE"' HEAD +--------------------------------------------------------------- + + + +Checklist for Shrinking a Repository +------------------------------------ + +git-filter-branch can be used to get rid of a subset of files, +usually with some combination of `--index-filter` and +`--subdirectory-filter`. People expect the resulting repository to +be smaller than the original, but you need a few more steps to +actually make it smaller, because Git tries hard not to lose your +objects until you tell it to. First make sure that: + +* You really removed all variants of a filename, if a blob was moved + over its lifetime. `git log --name-only --follow --all -- filename` + can help you find renames. + +* You really filtered all refs: use `--tag-name-filter cat -- --all` + when calling git-filter-branch. + +Then there are two ways to get a smaller repository. A safer way is +to clone, that keeps your original intact. + +* Clone it with `git clone file:///path/to/repo`. The clone + will not have the removed objects. See linkgit:git-clone[1]. (Note + that cloning with a plain path just hardlinks everything!) + +If you really don't want to clone it, for whatever reasons, check the +following points instead (in this order). This is a very destructive +approach, so *make a backup* or go back to cloning it. You have been +warned. + +* Remove the original refs backed up by git-filter-branch: say `git + for-each-ref --format="%(refname)" refs/original/ | xargs -n 1 git + update-ref -d`. + +* Expire all reflogs with `git reflog expire --expire=now --all`. + +* Garbage collect all unreferenced objects with `git gc --prune=now` + (or if your git-gc is not new enough to support arguments to + `--prune`, use `git repack -ad; git prune` instead). + +Notes +----- + +git-filter-branch allows you to make complex shell-scripted rewrites +of your Git history, but you probably don't need this flexibility if +you're simply _removing unwanted data_ like large files or passwords. +For those operations you may want to consider +http://rtyley.github.io/bfg-repo-cleaner/[The BFG Repo-Cleaner], +a JVM-based alternative to git-filter-branch, typically at least +10-50x faster for those use-cases, and with quite different +characteristics: + +* Any particular version of a file is cleaned exactly _once_. The BFG, + unlike git-filter-branch, does not give you the opportunity to + handle a file differently based on where or when it was committed + within your history. This constraint gives the core performance + benefit of The BFG, and is well-suited to the task of cleansing bad + data - you don't care _where_ the bad data is, you just want it + _gone_. + +* By default The BFG takes full advantage of multi-core machines, + cleansing commit file-trees in parallel. git-filter-branch cleans + commits sequentially (i.e. in a single-threaded manner), though it + _is_ possible to write filters that include their own parallelism, + in the scripts executed against each commit. + +* The http://rtyley.github.io/bfg-repo-cleaner/#examples[command options] + are much more restrictive than git-filter branch, and dedicated just + to the tasks of removing unwanted data- e.g: + `--strip-blobs-bigger-than 1M`. + +GIT +--- +Part of the linkgit:git[1] suite diff --git a/Documentation/git-fmt-merge-msg.txt b/Documentation/git-fmt-merge-msg.txt new file mode 100644 index 0000000..6526b17 --- /dev/null +++ b/Documentation/git-fmt-merge-msg.txt @@ -0,0 +1,78 @@ +git-fmt-merge-msg(1) +==================== + +NAME +---- +git-fmt-merge-msg - Produce a merge commit message + + +SYNOPSIS +-------- +[verse] +'git fmt-merge-msg' [-m <message>] [--log[=<n>] | --no-log] +'git fmt-merge-msg' [-m <message>] [--log[=<n>] | --no-log] -F <file> + +DESCRIPTION +----------- +Takes the list of merged objects on stdin and produces a suitable +commit message to be used for the merge commit, usually to be +passed as the '<merge-message>' argument of 'git merge'. + +This command is intended mostly for internal use by scripts +automatically invoking 'git merge'. + +OPTIONS +------- + +--log[=<n>]:: + In addition to branch names, populate the log message with + one-line descriptions from the actual commits that are being + merged. At most <n> commits from each merge parent will be + used (20 if <n> is omitted). This overrides the `merge.log` + configuration variable. + +--no-log:: + Do not list one-line descriptions from the actual commits being + merged. + +--[no-]summary:: + Synonyms to --log and --no-log; these are deprecated and will be + removed in the future. + +-m <message>:: +--message <message>:: + Use <message> instead of the branch names for the first line + of the log message. For use with `--log`. + +-F <file>:: +--file <file>:: + Take the list of merged objects from <file> instead of + stdin. + +CONFIGURATION +------------- +include::fmt-merge-msg-config.txt[] + +merge.summary:: + Synonym to `merge.log`; this is deprecated and will be removed in + the future. + +EXAMPLE +------- + +-- +$ git fetch origin master +$ git fmt-merge-msg --log <$GIT_DIR/FETCH_HEAD +-- + +Print a log message describing a merge of the "master" branch from +the "origin" remote. + + +SEE ALSO +-------- +linkgit:git-merge[1] + +GIT +--- +Part of the linkgit:git[1] suite diff --git a/Documentation/git-for-each-ref.txt b/Documentation/git-for-each-ref.txt new file mode 100644 index 0000000..d9d406d --- /dev/null +++ b/Documentation/git-for-each-ref.txt @@ -0,0 +1,277 @@ +git-for-each-ref(1) +=================== + +NAME +---- +git-for-each-ref - Output information on each ref + +SYNOPSIS +-------- +[verse] +'git for-each-ref' [--count=<count>] [--shell|--perl|--python|--tcl] + [(--sort=<key>)...] [--format=<format>] [<pattern>...] + [--points-at <object>] [(--merged | --no-merged) [<object>]] + [--contains [<object>]] + +DESCRIPTION +----------- + +Iterate over all refs that match `<pattern>` and show them +according to the given `<format>`, after sorting them according +to the given set of `<key>`. If `<count>` is given, stop after +showing that many refs. The interpolated values in `<format>` +can optionally be quoted as string literals in the specified +host language allowing their direct evaluation in that language. + +OPTIONS +------- +<count>:: + By default the command shows all refs that match + `<pattern>`. This option makes it stop after showing + that many refs. + +<key>:: + A field name to sort on. Prefix `-` to sort in + descending order of the value. When unspecified, + `refname` is used. You may use the --sort=<key> option + multiple times, in which case the last key becomes the primary + key. + +<format>:: + A string that interpolates `%(fieldname)` from the + object pointed at by a ref being shown. If `fieldname` + is prefixed with an asterisk (`*`) and the ref points + at a tag object, the value for the field in the object + tag refers is used. When unspecified, defaults to + `%(objectname) SPC %(objecttype) TAB %(refname)`. + It also interpolates `%%` to `%`, and `%xx` where `xx` + are hex digits interpolates to character with hex code + `xx`; for example `%00` interpolates to `\0` (NUL), + `%09` to `\t` (TAB) and `%0a` to `\n` (LF). + +<pattern>...:: + If one or more patterns are given, only refs are shown that + match against at least one pattern, either using fnmatch(3) or + literally, in the latter case matching completely or from the + beginning up to a slash. + +--shell:: +--perl:: +--python:: +--tcl:: + If given, strings that substitute `%(fieldname)` + placeholders are quoted as string literals suitable for + the specified host language. This is meant to produce + a scriptlet that can directly be `eval`ed. + +--points-at <object>:: + Only list refs which points at the given object. + +--merged [<object>]:: + Only list refs whose tips are reachable from the + specified commit (HEAD if not specified). + +--no-merged [<object>]:: + Only list refs whose tips are not reachable from the + specified commit (HEAD if not specified). + +--contains [<object>]:: + Only list refs which contain the specified commit (HEAD if not + specified). + +FIELD NAMES +----------- + +Various values from structured fields in referenced objects can +be used to interpolate into the resulting output, or as sort +keys. + +For all objects, the following names can be used: + +refname:: + The name of the ref (the part after $GIT_DIR/). + For a non-ambiguous short name of the ref append `:short`. + The option core.warnAmbiguousRefs is used to select the strict + abbreviation mode. If `strip=<N>` is appended, strips `<N>` + slash-separated path components from the front of the refname + (e.g., `%(refname:strip=2)` turns `refs/tags/foo` into `foo`. + `<N>` must be a positive integer. If a displayed ref has fewer + components than `<N>`, the command aborts with an error. + +objecttype:: + The type of the object (`blob`, `tree`, `commit`, `tag`). + +objectsize:: + The size of the object (the same as 'git cat-file -s' reports). + +objectname:: + The object name (aka SHA-1). + For a non-ambiguous abbreviation of the object name append `:short`. + +upstream:: + The name of a local ref which can be considered ``upstream'' + from the displayed ref. Respects `:short` in the same way as + `refname` above. Additionally respects `:track` to show + "[ahead N, behind M]" and `:trackshort` to show the terse + version: ">" (ahead), "<" (behind), "<>" (ahead and behind), + or "=" (in sync). Has no effect if the ref does not have + tracking information associated with it. + +push:: + The name of a local ref which represents the `@{push}` location + for the displayed ref. Respects `:short`, `:track`, and + `:trackshort` options as `upstream` does. Produces an empty + string if no `@{push}` ref is configured. + +HEAD:: + '*' if HEAD matches current ref (the checked out branch), ' ' + otherwise. + +color:: + Change output color. Followed by `:<colorname>`, where names + are described in `color.branch.*`. + +align:: + Left-, middle-, or right-align the content between + %(align:...) and %(end). The "align:" is followed by + `width=<width>` and `position=<position>` in any order + separated by a comma, where the `<position>` is either left, + right or middle, default being left and `<width>` is the total + length of the content with alignment. For brevity, the + "width=" and/or "position=" prefixes may be omitted, and bare + <width> and <position> used instead. For instance, + `%(align:<width>,<position>)`. If the contents length is more + than the width then no alignment is performed. If used with + '--quote' everything in between %(align:...) and %(end) is + quoted, but if nested then only the topmost level performs + quoting. + +In addition to the above, for commit and tag objects, the header +field names (`tree`, `parent`, `object`, `type`, and `tag`) can +be used to specify the value in the header field. + +For commit and tag objects, the special `creatordate` and `creator` +fields will correspond to the appropriate date or name-email-date tuple +from the `committer` or `tagger` fields depending on the object type. +These are intended for working on a mix of annotated and lightweight tags. + +Fields that have name-email-date tuple as its value (`author`, +`committer`, and `tagger`) can be suffixed with `name`, `email`, +and `date` to extract the named component. + +The complete message in a commit and tag object is `contents`. +Its first line is `contents:subject`, where subject is the concatenation +of all lines of the commit message up to the first blank line. The next +line is 'contents:body', where body is all of the lines after the first +blank line. The optional GPG signature is `contents:signature`. The +first `N` lines of the message is obtained using `contents:lines=N`. + +For sorting purposes, fields with numeric values sort in numeric order +(`objectsize`, `authordate`, `committerdate`, `creatordate`, `taggerdate`). +All other fields are used to sort in their byte-value order. + +There is also an option to sort by versions, this can be done by using +the fieldname `version:refname` or its alias `v:refname`. + +In any case, a field name that refers to a field inapplicable to +the object referred by the ref does not cause an error. It +returns an empty string instead. + +As a special case for the date-type fields, you may specify a format for +the date by adding `:` followed by date format name (see the +values the `--date` option to linkgit:git-rev-list[1] takes). + + +EXAMPLES +-------- + +An example directly producing formatted text. Show the most recent +3 tagged commits: + +------------ +#!/bin/sh + +git for-each-ref --count=3 --sort='-*authordate' \ +--format='From: %(*authorname) %(*authoremail) +Subject: %(*subject) +Date: %(*authordate) +Ref: %(*refname) + +%(*body) +' 'refs/tags' +------------ + + +A simple example showing the use of shell eval on the output, +demonstrating the use of --shell. List the prefixes of all heads: +------------ +#!/bin/sh + +git for-each-ref --shell --format="ref=%(refname)" refs/heads | \ +while read entry +do + eval "$entry" + echo `dirname $ref` +done +------------ + + +A bit more elaborate report on tags, demonstrating that the format +may be an entire script: +------------ +#!/bin/sh + +fmt=' + r=%(refname) + t=%(*objecttype) + T=${r#refs/tags/} + + o=%(*objectname) + n=%(*authorname) + e=%(*authoremail) + s=%(*subject) + d=%(*authordate) + b=%(*body) + + kind=Tag + if test "z$t" = z + then + # could be a lightweight tag + t=%(objecttype) + kind="Lightweight tag" + o=%(objectname) + n=%(authorname) + e=%(authoremail) + s=%(subject) + d=%(authordate) + b=%(body) + fi + echo "$kind $T points at a $t object $o" + if test "z$t" = zcommit + then + echo "The commit was authored by $n $e +at $d, and titled + + $s + +Its message reads as: +" + echo "$b" | sed -e "s/^/ /" + echo + fi +' + +eval=`git for-each-ref --shell --format="$fmt" \ + --sort='*objecttype' \ + --sort=-taggerdate \ + refs/tags` +eval "$eval" +------------ + +SEE ALSO +-------- +linkgit:git-show-ref[1] + +GIT +--- +Part of the linkgit:git[1] suite diff --git a/Documentation/git-format-patch.txt b/Documentation/git-format-patch.txt new file mode 100644 index 0000000..6821441 --- /dev/null +++ b/Documentation/git-format-patch.txt @@ -0,0 +1,575 @@ +git-format-patch(1) +=================== + +NAME +---- +git-format-patch - Prepare patches for e-mail submission + + +SYNOPSIS +-------- +[verse] +'git format-patch' [-k] [(-o|--output-directory) <dir> | --stdout] + [--no-thread | --thread[=<style>]] + [(--attach|--inline)[=<boundary>] | --no-attach] + [-s | --signoff] + [--signature=<signature> | --no-signature] + [--signature-file=<file>] + [-n | --numbered | -N | --no-numbered] + [--start-number <n>] [--numbered-files] + [--in-reply-to=Message-Id] [--suffix=.<sfx>] + [--ignore-if-in-upstream] + [--subject-prefix=Subject-Prefix] [(--reroll-count|-v) <n>] + [--to=<email>] [--cc=<email>] + [--[no-]cover-letter] [--quiet] [--notes[=<ref>]] + [<common diff options>] + [ <since> | <revision range> ] + +DESCRIPTION +----------- + +Prepare each commit with its patch in +one file per commit, formatted to resemble UNIX mailbox format. +The output of this command is convenient for e-mail submission or +for use with 'git am'. + +There are two ways to specify which commits to operate on. + +1. A single commit, <since>, specifies that the commits leading + to the tip of the current branch that are not in the history + that leads to the <since> to be output. + +2. Generic <revision range> expression (see "SPECIFYING + REVISIONS" section in linkgit:gitrevisions[7]) means the + commits in the specified range. + +The first rule takes precedence in the case of a single <commit>. To +apply the second rule, i.e., format everything since the beginning of +history up until <commit>, use the '\--root' option: `git format-patch +--root <commit>`. If you want to format only <commit> itself, you +can do this with `git format-patch -1 <commit>`. + +By default, each output file is numbered sequentially from 1, and uses the +first line of the commit message (massaged for pathname safety) as +the filename. With the `--numbered-files` option, the output file names +will only be numbers, without the first line of the commit appended. +The names of the output files are printed to standard +output, unless the `--stdout` option is specified. + +If `-o` is specified, output files are created in <dir>. Otherwise +they are created in the current working directory. The default path +can be set with the 'format.outputDirectory' configuration option. +The `-o` option takes precedence over `format.outputDirectory`. +To store patches in the current working directory even when +`format.outputDirectory` points elsewhere, use `-o .`. + +By default, the subject of a single patch is "[PATCH] " followed by +the concatenation of lines from the commit message up to the first blank +line (see the DISCUSSION section of linkgit:git-commit[1]). + +When multiple patches are output, the subject prefix will instead be +"[PATCH n/m] ". To force 1/1 to be added for a single patch, use `-n`. +To omit patch numbers from the subject, use `-N`. + +If given `--thread`, `git-format-patch` will generate `In-Reply-To` and +`References` headers to make the second and subsequent patch mails appear +as replies to the first mail; this also generates a `Message-Id` header to +reference. + +OPTIONS +------- +:git-format-patch: 1 +include::diff-options.txt[] + +-<n>:: + Prepare patches from the topmost <n> commits. + +-o <dir>:: +--output-directory <dir>:: + Use <dir> to store the resulting files, instead of the + current working directory. + +-n:: +--numbered:: + Name output in '[PATCH n/m]' format, even with a single patch. + +-N:: +--no-numbered:: + Name output in '[PATCH]' format. + +--start-number <n>:: + Start numbering the patches at <n> instead of 1. + +--numbered-files:: + Output file names will be a simple number sequence + without the default first line of the commit appended. + +-k:: +--keep-subject:: + Do not strip/add '[PATCH]' from the first line of the + commit log message. + +-s:: +--signoff:: + Add `Signed-off-by:` line to the commit message, using + the committer identity of yourself. + See the signoff option in linkgit:git-commit[1] for more information. + +--stdout:: + Print all commits to the standard output in mbox format, + instead of creating a file for each one. + +--attach[=<boundary>]:: + Create multipart/mixed attachment, the first part of + which is the commit message and the patch itself in the + second part, with `Content-Disposition: attachment`. + +--no-attach:: + Disable the creation of an attachment, overriding the + configuration setting. + +--inline[=<boundary>]:: + Create multipart/mixed attachment, the first part of + which is the commit message and the patch itself in the + second part, with `Content-Disposition: inline`. + +--thread[=<style>]:: +--no-thread:: + Controls addition of `In-Reply-To` and `References` headers to + make the second and subsequent mails appear as replies to the + first. Also controls generation of the `Message-Id` header to + reference. ++ +The optional <style> argument can be either `shallow` or `deep`. +'shallow' threading makes every mail a reply to the head of the +series, where the head is chosen from the cover letter, the +`--in-reply-to`, and the first patch mail, in this order. 'deep' +threading makes every mail a reply to the previous one. ++ +The default is `--no-thread`, unless the 'format.thread' configuration +is set. If `--thread` is specified without a style, it defaults to the +style specified by 'format.thread' if any, or else `shallow`. ++ +Beware that the default for 'git send-email' is to thread emails +itself. If you want `git format-patch` to take care of threading, you +will want to ensure that threading is disabled for `git send-email`. + +--in-reply-to=Message-Id:: + Make the first mail (or all the mails with `--no-thread`) appear as a + reply to the given Message-Id, which avoids breaking threads to + provide a new patch series. + +--ignore-if-in-upstream:: + Do not include a patch that matches a commit in + <until>..<since>. This will examine all patches reachable + from <since> but not from <until> and compare them with the + patches being generated, and any patch that matches is + ignored. + +--subject-prefix=<Subject-Prefix>:: + Instead of the standard '[PATCH]' prefix in the subject + line, instead use '[<Subject-Prefix>]'. This + allows for useful naming of a patch series, and can be + combined with the `--numbered` option. + +-v <n>:: +--reroll-count=<n>:: + Mark the series as the <n>-th iteration of the topic. The + output filenames have `v<n>` prepended to them, and the + subject prefix ("PATCH" by default, but configurable via the + `--subject-prefix` option) has ` v<n>` appended to it. E.g. + `--reroll-count=4` may produce `v4-0001-add-makefile.patch` + file that has "Subject: [PATCH v4 1/20] Add makefile" in it. + +--to=<email>:: + Add a `To:` header to the email headers. This is in addition + to any configured headers, and may be used multiple times. + The negated form `--no-to` discards all `To:` headers added so + far (from config or command line). + +--cc=<email>:: + Add a `Cc:` header to the email headers. This is in addition + to any configured headers, and may be used multiple times. + The negated form `--no-cc` discards all `Cc:` headers added so + far (from config or command line). + +--from:: +--from=<ident>:: + Use `ident` in the `From:` header of each commit email. If the + author ident of the commit is not textually identical to the + provided `ident`, place a `From:` header in the body of the + message with the original author. If no `ident` is given, use + the committer ident. ++ +Note that this option is only useful if you are actually sending the +emails and want to identify yourself as the sender, but retain the +original author (and `git am` will correctly pick up the in-body +header). Note also that `git send-email` already handles this +transformation for you, and this option should not be used if you are +feeding the result to `git send-email`. + +--add-header=<header>:: + Add an arbitrary header to the email headers. This is in addition + to any configured headers, and may be used multiple times. + For example, `--add-header="Organization: git-foo"`. + The negated form `--no-add-header` discards *all* (`To:`, + `Cc:`, and custom) headers added so far from config or command + line. + +--[no-]cover-letter:: + In addition to the patches, generate a cover letter file + containing the branch description, shortlog and the overall diffstat. You can + fill in a description in the file before sending it out. + +--notes[=<ref>]:: + Append the notes (see linkgit:git-notes[1]) for the commit + after the three-dash line. ++ +The expected use case of this is to write supporting explanation for +the commit that does not belong to the commit log message proper, +and include it with the patch submission. While one can simply write +these explanations after `format-patch` has run but before sending, +keeping them as Git notes allows them to be maintained between versions +of the patch series (but see the discussion of the `notes.rewrite` +configuration options in linkgit:git-notes[1] to use this workflow). + +--[no]-signature=<signature>:: + Add a signature to each message produced. Per RFC 3676 the signature + is separated from the body by a line with '-- ' on it. If the + signature option is omitted the signature defaults to the Git version + number. + +--signature-file=<file>:: + Works just like --signature except the signature is read from a file. + +--suffix=.<sfx>:: + Instead of using `.patch` as the suffix for generated + filenames, use specified suffix. A common alternative is + `--suffix=.txt`. Leaving this empty will remove the `.patch` + suffix. ++ +Note that the leading character does not have to be a dot; for example, +you can use `--suffix=-patch` to get `0001-description-of-my-change-patch`. + +-q:: +--quiet:: + Do not print the names of the generated files to standard output. + +--no-binary:: + Do not output contents of changes in binary files, instead + display a notice that those files changed. Patches generated + using this option cannot be applied properly, but they are + still useful for code review. + +--zero-commit:: + Output an all-zero hash in each patch's From header instead + of the hash of the commit. + +--root:: + Treat the revision argument as a <revision range>, even if it + is just a single commit (that would normally be treated as a + <since>). Note that root commits included in the specified + range are always formatted as creation patches, independently + of this flag. + +CONFIGURATION +------------- +You can specify extra mail header lines to be added to each message, +defaults for the subject prefix and file suffix, number patches when +outputting more than one patch, add "To" or "Cc:" headers, configure +attachments, and sign off patches with configuration variables. + +------------ +[format] + headers = "Organization: git-foo\n" + subjectPrefix = CHANGE + suffix = .txt + numbered = auto + to = <email> + cc = <email> + attach [ = mime-boundary-string ] + signOff = true + coverletter = auto +------------ + + +DISCUSSION +---------- + +The patch produced by 'git format-patch' is in UNIX mailbox format, +with a fixed "magic" time stamp to indicate that the file is output +from format-patch rather than a real mailbox, like so: + +------------ +From 8f72bad1baf19a53459661343e21d6491c3908d3 Mon Sep 17 00:00:00 2001 +From: Tony Luck <tony.luck@intel.com> +Date: Tue, 13 Jul 2010 11:42:54 -0700 +Subject: [PATCH] =?UTF-8?q?[IA64]=20Put=20ia64=20config=20files=20on=20the=20?= + =?UTF-8?q?Uwe=20Kleine-K=C3=B6nig=20diet?= +MIME-Version: 1.0 +Content-Type: text/plain; charset=UTF-8 +Content-Transfer-Encoding: 8bit + +arch/arm config files were slimmed down using a python script +(See commit c2330e286f68f1c408b4aa6515ba49d57f05beae comment) + +Do the same for ia64 so we can have sleek & trim looking +... +------------ + +Typically it will be placed in a MUA's drafts folder, edited to add +timely commentary that should not go in the changelog after the three +dashes, and then sent as a message whose body, in our example, starts +with "arch/arm config files were...". On the receiving end, readers +can save interesting patches in a UNIX mailbox and apply them with +linkgit:git-am[1]. + +When a patch is part of an ongoing discussion, the patch generated by +'git format-patch' can be tweaked to take advantage of the 'git am +--scissors' feature. After your response to the discussion comes a +line that consists solely of "`-- >8 --`" (scissors and perforation), +followed by the patch with unnecessary header fields removed: + +------------ +... +> So we should do such-and-such. + +Makes sense to me. How about this patch? + +-- >8 -- +Subject: [IA64] Put ia64 config files on the Uwe Kleine-König diet + +arch/arm config files were slimmed down using a python script +... +------------ + +When sending a patch this way, most often you are sending your own +patch, so in addition to the "`From $SHA1 $magic_timestamp`" marker you +should omit `From:` and `Date:` lines from the patch file. The patch +title is likely to be different from the subject of the discussion the +patch is in response to, so it is likely that you would want to keep +the Subject: line, like the example above. + +Checking for patch corruption +~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ +Many mailers if not set up properly will corrupt whitespace. Here are +two common types of corruption: + +* Empty context lines that do not have _any_ whitespace. + +* Non-empty context lines that have one extra whitespace at the + beginning. + +One way to test if your MUA is set up correctly is: + +* Send the patch to yourself, exactly the way you would, except + with To: and Cc: lines that do not contain the list and + maintainer address. + +* Save that patch to a file in UNIX mailbox format. Call it a.patch, + say. + +* Apply it: + + $ git fetch <project> master:test-apply + $ git checkout test-apply + $ git reset --hard + $ git am a.patch + +If it does not apply correctly, there can be various reasons. + +* The patch itself does not apply cleanly. That is _bad_ but + does not have much to do with your MUA. You might want to rebase + the patch with linkgit:git-rebase[1] before regenerating it in + this case. + +* The MUA corrupted your patch; "am" would complain that + the patch does not apply. Look in the .git/rebase-apply/ subdirectory and + see what 'patch' file contains and check for the common + corruption patterns mentioned above. + +* While at it, check the 'info' and 'final-commit' files as well. + If what is in 'final-commit' is not exactly what you would want to + see in the commit log message, it is very likely that the + receiver would end up hand editing the log message when applying + your patch. Things like "Hi, this is my first patch.\n" in the + patch e-mail should come after the three-dash line that signals + the end of the commit message. + +MUA-SPECIFIC HINTS +------------------ +Here are some hints on how to successfully submit patches inline using +various mailers. + +GMail +~~~~~ +GMail does not have any way to turn off line wrapping in the web +interface, so it will mangle any emails that you send. You can however +use "git send-email" and send your patches through the GMail SMTP server, or +use any IMAP email client to connect to the google IMAP server and forward +the emails through that. + +For hints on using 'git send-email' to send your patches through the +GMail SMTP server, see the EXAMPLE section of linkgit:git-send-email[1]. + +For hints on submission using the IMAP interface, see the EXAMPLE +section of linkgit:git-imap-send[1]. + +Thunderbird +~~~~~~~~~~~ +By default, Thunderbird will both wrap emails as well as flag +them as being 'format=flowed', both of which will make the +resulting email unusable by Git. + +There are three different approaches: use an add-on to turn off line wraps, +configure Thunderbird to not mangle patches, or use +an external editor to keep Thunderbird from mangling the patches. + +Approach #1 (add-on) +^^^^^^^^^^^^^^^^^^^^ + +Install the Toggle Word Wrap add-on that is available from +https://addons.mozilla.org/thunderbird/addon/toggle-word-wrap/ +It adds a menu entry "Enable Word Wrap" in the composer's "Options" menu +that you can tick off. Now you can compose the message as you otherwise do +(cut + paste, 'git format-patch' | 'git imap-send', etc), but you have to +insert line breaks manually in any text that you type. + +Approach #2 (configuration) +^^^^^^^^^^^^^^^^^^^^^^^^^^^ +Three steps: + +1. Configure your mail server composition as plain text: + Edit...Account Settings...Composition & Addressing, + uncheck "Compose Messages in HTML". + +2. Configure your general composition window to not wrap. ++ +In Thunderbird 2: +Edit..Preferences..Composition, wrap plain text messages at 0 ++ +In Thunderbird 3: +Edit..Preferences..Advanced..Config Editor. Search for +"mail.wrap_long_lines". +Toggle it to make sure it is set to `false`. Also, search for +"mailnews.wraplength" and set the value to 0. + +3. Disable the use of format=flowed: +Edit..Preferences..Advanced..Config Editor. Search for +"mailnews.send_plaintext_flowed". +Toggle it to make sure it is set to `false`. + +After that is done, you should be able to compose email as you +otherwise would (cut + paste, 'git format-patch' | 'git imap-send', etc), +and the patches will not be mangled. + +Approach #3 (external editor) +^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ + +The following Thunderbird extensions are needed: +AboutConfig from http://aboutconfig.mozdev.org/ and +External Editor from http://globs.org/articles.php?lng=en&pg=8 + +1. Prepare the patch as a text file using your method of choice. + +2. Before opening a compose window, use Edit->Account Settings to + uncheck the "Compose messages in HTML format" setting in the + "Composition & Addressing" panel of the account to be used to + send the patch. + +3. In the main Thunderbird window, 'before' you open the compose + window for the patch, use Tools->about:config to set the + following to the indicated values: ++ +---------- + mailnews.send_plaintext_flowed => false + mailnews.wraplength => 0 +---------- + +4. Open a compose window and click the external editor icon. + +5. In the external editor window, read in the patch file and exit + the editor normally. + +Side note: it may be possible to do step 2 with +about:config and the following settings but no one's tried yet. + +---------- + mail.html_compose => false + mail.identity.default.compose_html => false + mail.identity.id?.compose_html => false +---------- + +There is a script in contrib/thunderbird-patch-inline which can help +you include patches with Thunderbird in an easy way. To use it, do the +steps above and then use the script as the external editor. + +KMail +~~~~~ +This should help you to submit patches inline using KMail. + +1. Prepare the patch as a text file. + +2. Click on New Mail. + +3. Go under "Options" in the Composer window and be sure that + "Word wrap" is not set. + +4. Use Message -> Insert file... and insert the patch. + +5. Back in the compose window: add whatever other text you wish to the + message, complete the addressing and subject fields, and press send. + + +EXAMPLES +-------- + +* Extract commits between revisions R1 and R2, and apply them on top of +the current branch using 'git am' to cherry-pick them: ++ +------------ +$ git format-patch -k --stdout R1..R2 | git am -3 -k +------------ + +* Extract all commits which are in the current branch but not in the +origin branch: ++ +------------ +$ git format-patch origin +------------ ++ +For each commit a separate file is created in the current directory. + +* Extract all commits that lead to 'origin' since the inception of the +project: ++ +------------ +$ git format-patch --root origin +------------ + +* The same as the previous one: ++ +------------ +$ git format-patch -M -B origin +------------ ++ +Additionally, it detects and handles renames and complete rewrites +intelligently to produce a renaming patch. A renaming patch reduces +the amount of text output, and generally makes it easier to review. +Note that non-Git "patch" programs won't understand renaming patches, so +use it only when you know the recipient uses Git to apply your patch. + +* Extract three topmost commits from the current branch and format them +as e-mailable patches: ++ +------------ +$ git format-patch -3 +------------ + +SEE ALSO +-------- +linkgit:git-am[1], linkgit:git-send-email[1] + +GIT +--- +Part of the linkgit:git[1] suite diff --git a/Documentation/git-fsck-objects.txt b/Documentation/git-fsck-objects.txt new file mode 100644 index 0000000..eec4bdb --- /dev/null +++ b/Documentation/git-fsck-objects.txt @@ -0,0 +1,22 @@ +git-fsck-objects(1) +=================== + +NAME +---- +git-fsck-objects - Verifies the connectivity and validity of the objects in the database + + +SYNOPSIS +-------- +[verse] +'git fsck-objects' ... + +DESCRIPTION +----------- + +This is a synonym for linkgit:git-fsck[1]. Please refer to the +documentation of that command. + +GIT +--- +Part of the linkgit:git[1] suite diff --git a/Documentation/git-fsck.txt b/Documentation/git-fsck.txt new file mode 100644 index 0000000..84ee92e --- /dev/null +++ b/Documentation/git-fsck.txt @@ -0,0 +1,152 @@ +git-fsck(1) +=========== + +NAME +---- +git-fsck - Verifies the connectivity and validity of the objects in the database + + +SYNOPSIS +-------- +[verse] +'git fsck' [--tags] [--root] [--unreachable] [--cache] [--no-reflogs] + [--[no-]full] [--strict] [--verbose] [--lost-found] + [--[no-]dangling] [--[no-]progress] [--connectivity-only] [<object>*] + +DESCRIPTION +----------- +Verifies the connectivity and validity of the objects in the database. + +OPTIONS +------- +<object>:: + An object to treat as the head of an unreachability trace. ++ +If no objects are given, 'git fsck' defaults to using the +index file, all SHA-1 references in `refs` namespace, and all reflogs +(unless --no-reflogs is given) as heads. + +--unreachable:: + Print out objects that exist but that aren't reachable from any + of the reference nodes. + +--[no-]dangling:: + Print objects that exist but that are never 'directly' used (default). + `--no-dangling` can be used to omit this information from the output. + +--root:: + Report root nodes. + +--tags:: + Report tags. + +--cache:: + Consider any object recorded in the index also as a head node for + an unreachability trace. + +--no-reflogs:: + Do not consider commits that are referenced only by an + entry in a reflog to be reachable. This option is meant + only to search for commits that used to be in a ref, but + now aren't, but are still in that corresponding reflog. + +--full:: + Check not just objects in GIT_OBJECT_DIRECTORY + ($GIT_DIR/objects), but also the ones found in alternate + object pools listed in GIT_ALTERNATE_OBJECT_DIRECTORIES + or $GIT_DIR/objects/info/alternates, + and in packed Git archives found in $GIT_DIR/objects/pack + and corresponding pack subdirectories in alternate + object pools. This is now default; you can turn it off + with --no-full. + +--connectivity-only:: + Check only the connectivity of tags, commits and tree objects. By + avoiding to unpack blobs, this speeds up the operation, at the + expense of missing corrupt objects or other problematic issues. + +--strict:: + Enable more strict checking, namely to catch a file mode + recorded with g+w bit set, which was created by older + versions of Git. Existing repositories, including the + Linux kernel, Git itself, and sparse repository have old + objects that triggers this check, but it is recommended + to check new projects with this flag. + +--verbose:: + Be chatty. + +--lost-found:: + Write dangling objects into .git/lost-found/commit/ or + .git/lost-found/other/, depending on type. If the object is + a blob, the contents are written into the file, rather than + its object name. + +--[no-]progress:: + Progress status is reported on the standard error stream by + default when it is attached to a terminal, unless + --no-progress or --verbose is specified. --progress forces + progress status even if the standard error stream is not + directed to a terminal. + +DISCUSSION +---------- + +git-fsck tests SHA-1 and general object sanity, and it does full tracking +of the resulting reachability and everything else. It prints out any +corruption it finds (missing or bad objects), and if you use the +'--unreachable' flag it will also print out objects that exist but that +aren't reachable from any of the specified head nodes (or the default +set, as mentioned above). + +Any corrupt objects you will have to find in backups or other archives +(i.e., you can just remove them and do an 'rsync' with some other site in +the hopes that somebody else has the object you have corrupted). + +Extracted Diagnostics +--------------------- + +expect dangling commits - potential heads - due to lack of head information:: + You haven't specified any nodes as heads so it won't be + possible to differentiate between un-parented commits and + root nodes. + +missing sha1 directory '<dir>':: + The directory holding the sha1 objects is missing. + +unreachable <type> <object>:: + The <type> object <object>, isn't actually referred to directly + or indirectly in any of the trees or commits seen. This can + mean that there's another root node that you're not specifying + or that the tree is corrupt. If you haven't missed a root node + then you might as well delete unreachable nodes since they + can't be used. + +missing <type> <object>:: + The <type> object <object>, is referred to but isn't present in + the database. + +dangling <type> <object>:: + The <type> object <object>, is present in the database but never + 'directly' used. A dangling commit could be a root node. + +sha1 mismatch <object>:: + The database has an object who's sha1 doesn't match the + database value. + This indicates a serious data integrity problem. + +Environment Variables +--------------------- + +GIT_OBJECT_DIRECTORY:: + used to specify the object database root (usually $GIT_DIR/objects) + +GIT_INDEX_FILE:: + used to specify the index file of the index + +GIT_ALTERNATE_OBJECT_DIRECTORIES:: + used to specify additional object database roots (usually unset) + +GIT +--- +Part of the linkgit:git[1] suite diff --git a/Documentation/git-gc.txt b/Documentation/git-gc.txt new file mode 100644 index 0000000..fa15104 --- /dev/null +++ b/Documentation/git-gc.txt @@ -0,0 +1,168 @@ +git-gc(1) +========= + +NAME +---- +git-gc - Cleanup unnecessary files and optimize the local repository + + +SYNOPSIS +-------- +[verse] +'git gc' [--aggressive] [--auto] [--quiet] [--prune=<date> | --no-prune] [--force] + +DESCRIPTION +----------- +Runs a number of housekeeping tasks within the current repository, +such as compressing file revisions (to reduce disk space and increase +performance) and removing unreachable objects which may have been +created from prior invocations of 'git add'. + +Users are encouraged to run this task on a regular basis within +each repository to maintain good disk space utilization and good +operating performance. + +Some git commands may automatically run 'git gc'; see the `--auto` flag +below for details. If you know what you're doing and all you want is to +disable this behavior permanently without further considerations, just do: + +---------------------- +$ git config --global gc.auto 0 +---------------------- + +OPTIONS +------- + +--aggressive:: + Usually 'git gc' runs very quickly while providing good disk + space utilization and performance. This option will cause + 'git gc' to more aggressively optimize the repository at the expense + of taking much more time. The effects of this optimization are + persistent, so this option only needs to be used occasionally; every + few hundred changesets or so. + +--auto:: + With this option, 'git gc' checks whether any housekeeping is + required; if not, it exits without performing any work. + Some git commands run `git gc --auto` after performing + operations that could create many loose objects. ++ +Housekeeping is required if there are too many loose objects or +too many packs in the repository. If the number of loose objects +exceeds the value of the `gc.auto` configuration variable, then +all loose objects are combined into a single pack using +`git repack -d -l`. Setting the value of `gc.auto` to 0 +disables automatic packing of loose objects. ++ +If the number of packs exceeds the value of `gc.autoPackLimit`, +then existing packs (except those marked with a `.keep` file) +are consolidated into a single pack by using the `-A` option of +'git repack'. Setting `gc.autoPackLimit` to 0 disables +automatic consolidation of packs. + +--prune=<date>:: + Prune loose objects older than date (default is 2 weeks ago, + overridable by the config variable `gc.pruneExpire`). + --prune=all prunes loose objects regardless of their age (do + not use --prune=all unless you know exactly what you are doing. + Unless the repository is quiescent, you will lose newly created + objects that haven't been anchored with the refs and end up + corrupting your repository). --prune is on by default. + +--no-prune:: + Do not prune any loose objects. + +--quiet:: + Suppress all progress reports. + +--force:: + Force `git gc` to run even if there may be another `git gc` + instance running on this repository. + +Configuration +------------- + +The optional configuration variable 'gc.reflogExpire' can be +set to indicate how long historical entries within each branch's +reflog should remain available in this repository. The setting is +expressed as a length of time, for example '90 days' or '3 months'. +It defaults to '90 days'. + +The optional configuration variable 'gc.reflogExpireUnreachable' +can be set to indicate how long historical reflog entries which +are not part of the current branch should remain available in +this repository. These types of entries are generally created as +a result of using `git commit --amend` or `git rebase` and are the +commits prior to the amend or rebase occurring. Since these changes +are not part of the current project most users will want to expire +them sooner. This option defaults to '30 days'. + +The above two configuration variables can be given to a pattern. For +example, this sets non-default expiry values only to remote-tracking +branches: + +------------ +[gc "refs/remotes/*"] + reflogExpire = never + reflogExpireUnreachable = 3 days +------------ + +The optional configuration variable 'gc.rerereResolved' indicates +how long records of conflicted merge you resolved earlier are +kept. This defaults to 60 days. + +The optional configuration variable 'gc.rerereUnresolved' indicates +how long records of conflicted merge you have not resolved are +kept. This defaults to 15 days. + +The optional configuration variable 'gc.packRefs' determines if +'git gc' runs 'git pack-refs'. This can be set to "notbare" to enable +it within all non-bare repos or it can be set to a boolean value. +This defaults to true. + +The optional configuration variable 'gc.aggressiveWindow' controls how +much time is spent optimizing the delta compression of the objects in +the repository when the --aggressive option is specified. The larger +the value, the more time is spent optimizing the delta compression. See +the documentation for the --window' option in linkgit:git-repack[1] for +more details. This defaults to 250. + +Similarly, the optional configuration variable 'gc.aggressiveDepth' +controls --depth option in linkgit:git-repack[1]. This defaults to 250. + +The optional configuration variable 'gc.pruneExpire' controls how old +the unreferenced loose objects have to be before they are pruned. The +default is "2 weeks ago". + + +Notes +----- + +'git gc' tries very hard to be safe about the garbage it collects. In +particular, it will keep not only objects referenced by your current set +of branches and tags, but also objects referenced by the index, +remote-tracking branches, refs saved by 'git filter-branch' in +refs/original/, or reflogs (which may reference commits in branches +that were later amended or rewound). + +If you are expecting some objects to be collected and they aren't, check +all of those locations and decide whether it makes sense in your case to +remove those references. + +HOOKS +----- + +The 'git gc --auto' command will run the 'pre-auto-gc' hook. See +linkgit:githooks[5] for more information. + + +SEE ALSO +-------- +linkgit:git-prune[1] +linkgit:git-reflog[1] +linkgit:git-repack[1] +linkgit:git-rerere[1] + +GIT +--- +Part of the linkgit:git[1] suite diff --git a/Documentation/git-get-tar-commit-id.txt b/Documentation/git-get-tar-commit-id.txt new file mode 100644 index 0000000..ac44d85 --- /dev/null +++ b/Documentation/git-get-tar-commit-id.txt @@ -0,0 +1,30 @@ +git-get-tar-commit-id(1) +======================== + +NAME +---- +git-get-tar-commit-id - Extract commit ID from an archive created using git-archive + + +SYNOPSIS +-------- +[verse] +'git get-tar-commit-id' + + +DESCRIPTION +----------- + +Read a tar archive created by 'git archive' from the standard input +and extract the commit ID stored in it. It reads only the first +1024 bytes of input, thus its runtime is not influenced by the size +of the tar archive very much. + +If no commit ID is found, 'git get-tar-commit-id' quietly exists with a +return code of 1. This can happen if the archive had not been created +using 'git archive' or if the first parameter of 'git archive' had been +a tree ID instead of a commit ID or tag. + +GIT +--- +Part of the linkgit:git[1] suite diff --git a/Documentation/git-grep.txt b/Documentation/git-grep.txt new file mode 100644 index 0000000..cb0f6cf --- /dev/null +++ b/Documentation/git-grep.txt @@ -0,0 +1,300 @@ +git-grep(1) +=========== + +NAME +---- +git-grep - Print lines matching a pattern + + +SYNOPSIS +-------- +[verse] +'git grep' [-a | --text] [-I] [--textconv] [-i | --ignore-case] [-w | --word-regexp] + [-v | --invert-match] [-h|-H] [--full-name] + [-E | --extended-regexp] [-G | --basic-regexp] + [-P | --perl-regexp] + [-F | --fixed-strings] [-n | --line-number] + [-l | --files-with-matches] [-L | --files-without-match] + [(-O | --open-files-in-pager) [<pager>]] + [-z | --null] + [-c | --count] [--all-match] [-q | --quiet] + [--max-depth <depth>] + [--color[=<when>] | --no-color] + [--break] [--heading] [-p | --show-function] + [-A <post-context>] [-B <pre-context>] [-C <context>] + [-W | --function-context] + [--threads <num>] + [-f <file>] [-e] <pattern> + [--and|--or|--not|(|)|-e <pattern>...] + [ [--[no-]exclude-standard] [--cached | --no-index | --untracked] | <tree>...] + [--] [<pathspec>...] + +DESCRIPTION +----------- +Look for specified patterns in the tracked files in the work tree, blobs +registered in the index file, or blobs in given tree objects. Patterns +are lists of one or more search expressions separated by newline +characters. An empty string as search expression matches all lines. + + +CONFIGURATION +------------- + +grep.lineNumber:: + If set to true, enable '-n' option by default. + +grep.patternType:: + Set the default matching behavior. Using a value of 'basic', 'extended', + 'fixed', or 'perl' will enable the '--basic-regexp', '--extended-regexp', + '--fixed-strings', or '--perl-regexp' option accordingly, while the + value 'default' will return to the default matching behavior. + +grep.extendedRegexp:: + If set to true, enable '--extended-regexp' option by default. This + option is ignored when the 'grep.patternType' option is set to a value + other than 'default'. + +grep.threads:: + Number of grep worker threads to use. If unset (or set to 0), + 8 threads are used by default (for now). + +grep.fullName:: + If set to true, enable '--full-name' option by default. + +grep.fallbackToNoIndex:: + If set to true, fall back to git grep --no-index if git grep + is executed outside of a git repository. Defaults to false. + + +OPTIONS +------- +--cached:: + Instead of searching tracked files in the working tree, search + blobs registered in the index file. + +--no-index:: + Search files in the current directory that is not managed by Git. + +--untracked:: + In addition to searching in the tracked files in the working + tree, search also in untracked files. + +--no-exclude-standard:: + Also search in ignored files by not honoring the `.gitignore` + mechanism. Only useful with `--untracked`. + +--exclude-standard:: + Do not pay attention to ignored files specified via the `.gitignore` + mechanism. Only useful when searching files in the current directory + with `--no-index`. + +-a:: +--text:: + Process binary files as if they were text. + +--textconv:: + Honor textconv filter settings. + +--no-textconv:: + Do not honor textconv filter settings. + This is the default. + +-i:: +--ignore-case:: + Ignore case differences between the patterns and the + files. + +-I:: + Don't match the pattern in binary files. + +--max-depth <depth>:: + For each <pathspec> given on command line, descend at most <depth> + levels of directories. A negative value means no limit. + This option is ignored if <pathspec> contains active wildcards. + In other words if "a*" matches a directory named "a*", + "*" is matched literally so --max-depth is still effective. + +-w:: +--word-regexp:: + Match the pattern only at word boundary (either begin at the + beginning of a line, or preceded by a non-word character; end at + the end of a line or followed by a non-word character). + +-v:: +--invert-match:: + Select non-matching lines. + +-h:: +-H:: + By default, the command shows the filename for each + match. `-h` option is used to suppress this output. + `-H` is there for completeness and does not do anything + except it overrides `-h` given earlier on the command + line. + +--full-name:: + When run from a subdirectory, the command usually + outputs paths relative to the current directory. This + option forces paths to be output relative to the project + top directory. + +-E:: +--extended-regexp:: +-G:: +--basic-regexp:: + Use POSIX extended/basic regexp for patterns. Default + is to use basic regexp. + +-P:: +--perl-regexp:: + Use Perl-compatible regexp for patterns. Requires libpcre to be + compiled in. + +-F:: +--fixed-strings:: + Use fixed strings for patterns (don't interpret pattern + as a regex). + +-n:: +--line-number:: + Prefix the line number to matching lines. + +-l:: +--files-with-matches:: +--name-only:: +-L:: +--files-without-match:: + Instead of showing every matched line, show only the + names of files that contain (or do not contain) matches. + For better compatibility with 'git diff', `--name-only` is a + synonym for `--files-with-matches`. + +-O[<pager>]:: +--open-files-in-pager[=<pager>]:: + Open the matching files in the pager (not the output of 'grep'). + If the pager happens to be "less" or "vi", and the user + specified only one pattern, the first file is positioned at + the first match automatically. The `pager` argument is + optional; if specified, it must be stuck to the option + without a space. If `pager` is unspecified, the default pager + will be used (see `core.pager` in linkgit:git-config[1]). + +-z:: +--null:: + Output \0 instead of the character that normally follows a + file name. + +-c:: +--count:: + Instead of showing every matched line, show the number of + lines that match. + +--color[=<when>]:: + Show colored matches. + The value must be always (the default), never, or auto. + +--no-color:: + Turn off match highlighting, even when the configuration file + gives the default to color output. + Same as `--color=never`. + +--break:: + Print an empty line between matches from different files. + +--heading:: + Show the filename above the matches in that file instead of + at the start of each shown line. + +-p:: +--show-function:: + Show the preceding line that contains the function name of + the match, unless the matching line is a function name itself. + The name is determined in the same way as 'git diff' works out + patch hunk headers (see 'Defining a custom hunk-header' in + linkgit:gitattributes[5]). + +-<num>:: +-C <num>:: +--context <num>:: + Show <num> leading and trailing lines, and place a line + containing `--` between contiguous groups of matches. + +-A <num>:: +--after-context <num>:: + Show <num> trailing lines, and place a line containing + `--` between contiguous groups of matches. + +-B <num>:: +--before-context <num>:: + Show <num> leading lines, and place a line containing + `--` between contiguous groups of matches. + +-W:: +--function-context:: + Show the surrounding text from the previous line containing a + function name up to the one before the next function name, + effectively showing the whole function in which the match was + found. + +--threads <num>:: + Number of grep worker threads to use. + See `grep.threads` in 'CONFIGURATION' for more information. + +-f <file>:: + Read patterns from <file>, one per line. + +-e:: + The next parameter is the pattern. This option has to be + used for patterns starting with `-` and should be used in + scripts passing user input to grep. Multiple patterns are + combined by 'or'. + +--and:: +--or:: +--not:: +( ... ):: + Specify how multiple patterns are combined using Boolean + expressions. `--or` is the default operator. `--and` has + higher precedence than `--or`. `-e` has to be used for all + patterns. + +--all-match:: + When giving multiple pattern expressions combined with `--or`, + this flag is specified to limit the match to files that + have lines to match all of them. + +-q:: +--quiet:: + Do not output matched lines; instead, exit with status 0 when + there is a match and with non-zero status when there isn't. + +<tree>...:: + Instead of searching tracked files in the working tree, search + blobs in the given trees. + +\--:: + Signals the end of options; the rest of the parameters + are <pathspec> limiters. + +<pathspec>...:: + If given, limit the search to paths matching at least one pattern. + Both leading paths match and glob(7) patterns are supported. + +Examples +-------- + +`git grep 'time_t' -- '*.[ch]'`:: + Looks for `time_t` in all tracked .c and .h files in the working + directory and its subdirectories. + +`git grep -e '#define' --and \( -e MAX_PATH -e PATH_MAX \)`:: + Looks for a line that has `#define` and either `MAX_PATH` or + `PATH_MAX`. + +`git grep --all-match -e NODE -e Unexpected`:: + Looks for a line that has `NODE` or `Unexpected` in + files that have lines that match both. + +GIT +--- +Part of the linkgit:git[1] suite diff --git a/Documentation/git-gui.txt b/Documentation/git-gui.txt new file mode 100644 index 0000000..8144527 --- /dev/null +++ b/Documentation/git-gui.txt @@ -0,0 +1,127 @@ +git-gui(1) +========== + +NAME +---- +git-gui - A portable graphical interface to Git + +SYNOPSIS +-------- +[verse] +'git gui' [<command>] [arguments] + +DESCRIPTION +----------- +A Tcl/Tk based graphical user interface to Git. 'git gui' focuses +on allowing users to make changes to their repository by making +new commits, amending existing ones, creating branches, performing +local merges, and fetching/pushing to remote repositories. + +Unlike 'gitk', 'git gui' focuses on commit generation +and single file annotation and does not show project history. +It does however supply menu actions to start a 'gitk' session from +within 'git gui'. + +'git gui' is known to work on all popular UNIX systems, Mac OS X, +and Windows (under both Cygwin and MSYS). To the extent possible +OS specific user interface guidelines are followed, making 'git gui' +a fairly native interface for users. + +COMMANDS +-------- +blame:: + Start a blame viewer on the specified file on the given + version (or working directory if not specified). + +browser:: + Start a tree browser showing all files in the specified + commit (or 'HEAD' by default). Files selected through the + browser are opened in the blame viewer. + +citool:: + Start 'git gui' and arrange to make exactly one commit before + exiting and returning to the shell. The interface is limited + to only commit actions, slightly reducing the application's + startup time and simplifying the menubar. + +version:: + Display the currently running version of 'git gui'. + + +Examples +-------- +`git gui blame Makefile`:: + + Show the contents of the file 'Makefile' in the current + working directory, and provide annotations for both the + original author of each line, and who moved the line to its + current location. The uncommitted file is annotated, and + uncommitted changes (if any) are explicitly attributed to + 'Not Yet Committed'. + +`git gui blame v0.99.8 Makefile`:: + + Show the contents of 'Makefile' in revision 'v0.99.8' + and provide annotations for each line. Unlike the above + example the file is read from the object database and not + the working directory. + +`git gui blame --line=100 Makefile`:: + + Loads annotations as described above and automatically + scrolls the view to center on line '100'. + +`git gui citool`:: + + Make one commit and return to the shell when it is complete. + This command returns a non-zero exit code if the window was + closed in any way other than by making a commit. + +`git gui citool --amend`:: + + Automatically enter the 'Amend Last Commit' mode of + the interface. + +`git gui citool --nocommit`:: + + Behave as normal citool, but instead of making a commit + simply terminate with a zero exit code. It still checks + that the index does not contain any unmerged entries, so + you can use it as a GUI version of linkgit:git-mergetool[1] + +`git citool`:: + + Same as `git gui citool` (above). + +`git gui browser maint`:: + + Show a browser for the tree of the 'maint' branch. Files + selected in the browser can be viewed with the internal + blame viewer. + +SEE ALSO +-------- +linkgit:gitk[1]:: + The Git repository browser. Shows branches, commit history + and file differences. gitk is the utility started by + 'git gui''s Repository Visualize actions. + +Other +----- +'git gui' is actually maintained as an independent project, but stable +versions are distributed as part of the Git suite for the convenience +of end users. + +A 'git gui' development repository can be obtained from: + + git clone git://repo.or.cz/git-gui.git + +or + + git clone http://repo.or.cz/r/git-gui.git + +or browsed online at http://repo.or.cz/w/git-gui.git/[]. + +GIT +--- +Part of the linkgit:git[1] suite diff --git a/Documentation/git-hash-object.txt b/Documentation/git-hash-object.txt new file mode 100644 index 0000000..814e744 --- /dev/null +++ b/Documentation/git-hash-object.txt @@ -0,0 +1,65 @@ +git-hash-object(1) +================== + +NAME +---- +git-hash-object - Compute object ID and optionally creates a blob from a file + + +SYNOPSIS +-------- +[verse] +'git hash-object' [-t <type>] [-w] [--path=<file>|--no-filters] [--stdin [--literally]] [--] <file>... +'git hash-object' [-t <type>] [-w] --stdin-paths [--no-filters] + +DESCRIPTION +----------- +Computes the object ID value for an object with specified type +with the contents of the named file (which can be outside of the +work tree), and optionally writes the resulting object into the +object database. Reports its object ID to its standard output. +This is used by 'git cvsimport' to update the index +without modifying files in the work tree. When <type> is not +specified, it defaults to "blob". + +OPTIONS +------- + +-t <type>:: + Specify the type (default: "blob"). + +-w:: + Actually write the object into the object database. + +--stdin:: + Read the object from standard input instead of from a file. + +--stdin-paths:: + Read file names from the standard input, one per line, instead + of from the command-line. + +--path:: + Hash object as it were located at the given path. The location of + file does not directly influence on the hash value, but path is + used to determine what Git filters should be applied to the object + before it can be placed to the object database, and, as result of + applying filters, the actual blob put into the object database may + differ from the given file. This option is mainly useful for hashing + temporary files located outside of the working directory or files + read from stdin. + +--no-filters:: + Hash the contents as is, ignoring any input filter that would + have been chosen by the attributes mechanism, including the end-of-line + conversion. If the file is read from standard input then this + is always implied, unless the `--path` option is given. + +--literally:: + Allow `--stdin` to hash any garbage into a loose object which might not + otherwise pass standard object parsing or git-fsck checks. Useful for + stress-testing Git itself or reproducing characteristics of corrupt or + bogus objects encountered in the wild. + +GIT +--- +Part of the linkgit:git[1] suite diff --git a/Documentation/git-help.txt b/Documentation/git-help.txt new file mode 100644 index 0000000..3956525 --- /dev/null +++ b/Documentation/git-help.txt @@ -0,0 +1,191 @@ +git-help(1) +=========== + +NAME +---- +git-help - Display help information about Git + +SYNOPSIS +-------- +[verse] +'git help' [-a|--all] [-g|--guide] + [-i|--info|-m|--man|-w|--web] [COMMAND|GUIDE] + +DESCRIPTION +----------- + +With no options and no COMMAND or GUIDE given, the synopsis of the 'git' +command and a list of the most commonly used Git commands are printed +on the standard output. + +If the option '--all' or '-a' is given, all available commands are +printed on the standard output. + +If the option '--guide' or '-g' is given, a list of the useful +Git guides is also printed on the standard output. + +If a command, or a guide, is given, a manual page for that command or +guide is brought up. The 'man' program is used by default for this +purpose, but this can be overridden by other options or configuration +variables. + +Note that `git --help ...` is identical to `git help ...` because the +former is internally converted into the latter. + +To display the linkgit:git[1] man page, use `git help git`. + +This page can be displayed with 'git help help' or `git help --help` + +OPTIONS +------- +-a:: +--all:: + Prints all the available commands on the standard output. This + option overrides any given command or guide name. + +-g:: +--guides:: + Prints a list of useful guides on the standard output. This + option overrides any given command or guide name. + +-i:: +--info:: + Display manual page for the command in the 'info' format. The + 'info' program will be used for that purpose. + +-m:: +--man:: + Display manual page for the command in the 'man' format. This + option may be used to override a value set in the + 'help.format' configuration variable. ++ +By default the 'man' program will be used to display the manual page, +but the 'man.viewer' configuration variable may be used to choose +other display programs (see below). + +-w:: +--web:: + Display manual page for the command in the 'web' (HTML) + format. A web browser will be used for that purpose. ++ +The web browser can be specified using the configuration variable +'help.browser', or 'web.browser' if the former is not set. If none of +these config variables is set, the 'git web{litdd}browse' helper script +(called by 'git help') will pick a suitable default. See +linkgit:git-web{litdd}browse[1] for more information about this. + +CONFIGURATION VARIABLES +----------------------- + +help.format +~~~~~~~~~~~ + +If no command-line option is passed, the 'help.format' configuration +variable will be checked. The following values are supported for this +variable; they make 'git help' behave as their corresponding command- +line option: + +* "man" corresponds to '-m|--man', +* "info" corresponds to '-i|--info', +* "web" or "html" correspond to '-w|--web'. + +help.browser, web.browser and browser.<tool>.path +~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ + +The 'help.browser', 'web.browser' and 'browser.<tool>.path' will also +be checked if the 'web' format is chosen (either by command-line +option or configuration variable). See '-w|--web' in the OPTIONS +section above and linkgit:git-web{litdd}browse[1]. + +man.viewer +~~~~~~~~~~ + +The 'man.viewer' configuration variable will be checked if the 'man' +format is chosen. The following values are currently supported: + +* "man": use the 'man' program as usual, +* "woman": use 'emacsclient' to launch the "woman" mode in emacs +(this only works starting with emacsclient versions 22), +* "konqueror": use 'kfmclient' to open the man page in a new konqueror +tab (see 'Note about konqueror' below). + +Values for other tools can be used if there is a corresponding +'man.<tool>.cmd' configuration entry (see below). + +Multiple values may be given to the 'man.viewer' configuration +variable. Their corresponding programs will be tried in the order +listed in the configuration file. + +For example, this configuration: + +------------------------------------------------ + [man] + viewer = konqueror + viewer = woman +------------------------------------------------ + +will try to use konqueror first. But this may fail (for example, if +DISPLAY is not set) and in that case emacs' woman mode will be tried. + +If everything fails, or if no viewer is configured, the viewer specified +in the GIT_MAN_VIEWER environment variable will be tried. If that +fails too, the 'man' program will be tried anyway. + +man.<tool>.path +~~~~~~~~~~~~~~~ + +You can explicitly provide a full path to your preferred man viewer by +setting the configuration variable 'man.<tool>.path'. For example, you +can configure the absolute path to konqueror by setting +'man.konqueror.path'. Otherwise, 'git help' assumes the tool is +available in PATH. + +man.<tool>.cmd +~~~~~~~~~~~~~~ + +When the man viewer, specified by the 'man.viewer' configuration +variables, is not among the supported ones, then the corresponding +'man.<tool>.cmd' configuration variable will be looked up. If this +variable exists then the specified tool will be treated as a custom +command and a shell eval will be used to run the command with the man +page passed as arguments. + +Note about konqueror +~~~~~~~~~~~~~~~~~~~~ + +When 'konqueror' is specified in the 'man.viewer' configuration +variable, we launch 'kfmclient' to try to open the man page on an +already opened konqueror in a new tab if possible. + +For consistency, we also try such a trick if 'man.konqueror.path' is +set to something like 'A_PATH_TO/konqueror'. That means we will try to +launch 'A_PATH_TO/kfmclient' instead. + +If you really want to use 'konqueror', then you can use something like +the following: + +------------------------------------------------ + [man] + viewer = konq + + [man "konq"] + cmd = A_PATH_TO/konqueror +------------------------------------------------ + +Note about git config --global +~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ + +Note that all these configuration variables should probably be set +using the '--global' flag, for example like this: + +------------------------------------------------ +$ git config --global help.format web +$ git config --global web.browser firefox +------------------------------------------------ + +as they are probably more user specific than repository specific. +See linkgit:git-config[1] for more information about this. + +GIT +--- +Part of the linkgit:git[1] suite diff --git a/Documentation/git-http-backend.txt b/Documentation/git-http-backend.txt new file mode 100644 index 0000000..9268fb6 --- /dev/null +++ b/Documentation/git-http-backend.txt @@ -0,0 +1,277 @@ +git-http-backend(1) +=================== + +NAME +---- +git-http-backend - Server side implementation of Git over HTTP + +SYNOPSIS +-------- +[verse] +'git http-backend' + +DESCRIPTION +----------- +A simple CGI program to serve the contents of a Git repository to Git +clients accessing the repository over http:// and https:// protocols. +The program supports clients fetching using both the smart HTTP protocol +and the backwards-compatible dumb HTTP protocol, as well as clients +pushing using the smart HTTP protocol. + +It verifies that the directory has the magic file +"git-daemon-export-ok", and it will refuse to export any Git directory +that hasn't explicitly been marked for export this way (unless the +GIT_HTTP_EXPORT_ALL environmental variable is set). + +By default, only the `upload-pack` service is enabled, which serves +'git fetch-pack' and 'git ls-remote' clients, which are invoked from +'git fetch', 'git pull', and 'git clone'. If the client is authenticated, +the `receive-pack` service is enabled, which serves 'git send-pack' +clients, which is invoked from 'git push'. + +SERVICES +-------- +These services can be enabled/disabled using the per-repository +configuration file: + +http.getanyfile:: + This serves Git clients older than version 1.6.6 that are unable to use the + upload pack service. When enabled, clients are able to read + any file within the repository, including objects that are + no longer reachable from a branch but are still present. + It is enabled by default, but a repository can disable it + by setting this configuration item to `false`. + +http.uploadpack:: + This serves 'git fetch-pack' and 'git ls-remote' clients. + It is enabled by default, but a repository can disable it + by setting this configuration item to `false`. + +http.receivepack:: + This serves 'git send-pack' clients, allowing push. It is + disabled by default for anonymous users, and enabled by + default for users authenticated by the web server. It can be + disabled by setting this item to `false`, or enabled for all + users, including anonymous users, by setting it to `true`. + +URL TRANSLATION +--------------- +To determine the location of the repository on disk, 'git http-backend' +concatenates the environment variables PATH_INFO, which is set +automatically by the web server, and GIT_PROJECT_ROOT, which must be set +manually in the web server configuration. If GIT_PROJECT_ROOT is not +set, 'git http-backend' reads PATH_TRANSLATED, which is also set +automatically by the web server. + +EXAMPLES +-------- +All of the following examples map `http://$hostname/git/foo/bar.git` +to `/var/www/git/foo/bar.git`. + +Apache 2.x:: + Ensure mod_cgi, mod_alias, and mod_env are enabled, set + GIT_PROJECT_ROOT (or DocumentRoot) appropriately, and + create a ScriptAlias to the CGI: ++ +---------------------------------------------------------------- +SetEnv GIT_PROJECT_ROOT /var/www/git +SetEnv GIT_HTTP_EXPORT_ALL +ScriptAlias /git/ /usr/libexec/git-core/git-http-backend/ +---------------------------------------------------------------- ++ +To enable anonymous read access but authenticated write access, +require authorization for both the initial ref advertisement (which we +detect as a push via the service parameter in the query string), and the +receive-pack invocation itself: ++ +---------------------------------------------------------------- +RewriteCond %{QUERY_STRING} service=git-receive-pack [OR] +RewriteCond %{REQUEST_URI} /git-receive-pack$ +RewriteRule ^/git/ - [E=AUTHREQUIRED:yes] + +<LocationMatch "^/git/"> + Order Deny,Allow + Deny from env=AUTHREQUIRED + + AuthType Basic + AuthName "Git Access" + Require group committers + Satisfy Any + ... +</LocationMatch> +---------------------------------------------------------------- ++ +If you do not have `mod_rewrite` available to match against the query +string, it is sufficient to just protect `git-receive-pack` itself, +like: ++ +---------------------------------------------------------------- +<LocationMatch "^/git/.*/git-receive-pack$"> + AuthType Basic + AuthName "Git Access" + Require group committers + ... +</LocationMatch> +---------------------------------------------------------------- ++ +In this mode, the server will not request authentication until the +client actually starts the object negotiation phase of the push, rather +than during the initial contact. For this reason, you must also enable +the `http.receivepack` config option in any repositories that should +accept a push. The default behavior, if `http.receivepack` is not set, +is to reject any pushes by unauthenticated users; the initial request +will therefore report `403 Forbidden` to the client, without even giving +an opportunity for authentication. ++ +To require authentication for both reads and writes, use a Location +directive around the repository, or one of its parent directories: ++ +---------------------------------------------------------------- +<Location /git/private> + AuthType Basic + AuthName "Private Git Access" + Require group committers + ... +</Location> +---------------------------------------------------------------- ++ +To serve gitweb at the same url, use a ScriptAliasMatch to only +those URLs that 'git http-backend' can handle, and forward the +rest to gitweb: ++ +---------------------------------------------------------------- +ScriptAliasMatch \ + "(?x)^/git/(.*/(HEAD | \ + info/refs | \ + objects/(info/[^/]+ | \ + [0-9a-f]{2}/[0-9a-f]{38} | \ + pack/pack-[0-9a-f]{40}\.(pack|idx)) | \ + git-(upload|receive)-pack))$" \ + /usr/libexec/git-core/git-http-backend/$1 + +ScriptAlias /git/ /var/www/cgi-bin/gitweb.cgi/ +---------------------------------------------------------------- ++ +To serve multiple repositories from different linkgit:gitnamespaces[7] in a +single repository: ++ +---------------------------------------------------------------- +SetEnvIf Request_URI "^/git/([^/]*)" GIT_NAMESPACE=$1 +ScriptAliasMatch ^/git/[^/]*(.*) /usr/libexec/git-core/git-http-backend/storage.git$1 +---------------------------------------------------------------- + +Accelerated static Apache 2.x:: + Similar to the above, but Apache can be used to return static + files that are stored on disk. On many systems this may + be more efficient as Apache can ask the kernel to copy the + file contents from the file system directly to the network: ++ +---------------------------------------------------------------- +SetEnv GIT_PROJECT_ROOT /var/www/git + +AliasMatch ^/git/(.*/objects/[0-9a-f]{2}/[0-9a-f]{38})$ /var/www/git/$1 +AliasMatch ^/git/(.*/objects/pack/pack-[0-9a-f]{40}.(pack|idx))$ /var/www/git/$1 +ScriptAlias /git/ /usr/libexec/git-core/git-http-backend/ +---------------------------------------------------------------- ++ +This can be combined with the gitweb configuration: ++ +---------------------------------------------------------------- +SetEnv GIT_PROJECT_ROOT /var/www/git + +AliasMatch ^/git/(.*/objects/[0-9a-f]{2}/[0-9a-f]{38})$ /var/www/git/$1 +AliasMatch ^/git/(.*/objects/pack/pack-[0-9a-f]{40}.(pack|idx))$ /var/www/git/$1 +ScriptAliasMatch \ + "(?x)^/git/(.*/(HEAD | \ + info/refs | \ + objects/info/[^/]+ | \ + git-(upload|receive)-pack))$" \ + /usr/libexec/git-core/git-http-backend/$1 +ScriptAlias /git/ /var/www/cgi-bin/gitweb.cgi/ +---------------------------------------------------------------- + +Lighttpd:: + Ensure that `mod_cgi`, `mod_alias`, `mod_auth`, `mod_setenv` are + loaded, then set `GIT_PROJECT_ROOT` appropriately and redirect + all requests to the CGI: ++ +---------------------------------------------------------------- +alias.url += ( "/git" => "/usr/lib/git-core/git-http-backend" ) +$HTTP["url"] =~ "^/git" { + cgi.assign = ("" => "") + setenv.add-environment = ( + "GIT_PROJECT_ROOT" => "/var/www/git", + "GIT_HTTP_EXPORT_ALL" => "" + ) +} +---------------------------------------------------------------- ++ +To enable anonymous read access but authenticated write access: ++ +---------------------------------------------------------------- +$HTTP["querystring"] =~ "service=git-receive-pack" { + include "git-auth.conf" +} +$HTTP["url"] =~ "^/git/.*/git-receive-pack$" { + include "git-auth.conf" +} +---------------------------------------------------------------- ++ +where `git-auth.conf` looks something like: ++ +---------------------------------------------------------------- +auth.require = ( + "/" => ( + "method" => "basic", + "realm" => "Git Access", + "require" => "valid-user" + ) +) +# ...and set up auth.backend here +---------------------------------------------------------------- ++ +To require authentication for both reads and writes: ++ +---------------------------------------------------------------- +$HTTP["url"] =~ "^/git/private" { + include "git-auth.conf" +} +---------------------------------------------------------------- + + +ENVIRONMENT +----------- +'git http-backend' relies upon the CGI environment variables set +by the invoking web server, including: + +* PATH_INFO (if GIT_PROJECT_ROOT is set, otherwise PATH_TRANSLATED) +* REMOTE_USER +* REMOTE_ADDR +* CONTENT_TYPE +* QUERY_STRING +* REQUEST_METHOD + +The GIT_HTTP_EXPORT_ALL environmental variable may be passed to +'git-http-backend' to bypass the check for the "git-daemon-export-ok" +file in each repository before allowing export of that repository. + +The `GIT_HTTP_MAX_REQUEST_BUFFER` environment variable (or the +`http.maxRequestBuffer` config variable) may be set to change the +largest ref negotiation request that git will handle during a fetch; any +fetch requiring a larger buffer will not succeed. This value should not +normally need to be changed, but may be helpful if you are fetching from +a repository with an extremely large number of refs. The value can be +specified with a unit (e.g., `100M` for 100 megabytes). The default is +10 megabytes. + +The backend process sets GIT_COMMITTER_NAME to '$REMOTE_USER' and +GIT_COMMITTER_EMAIL to '$\{REMOTE_USER}@http.$\{REMOTE_ADDR\}', +ensuring that any reflogs created by 'git-receive-pack' contain some +identifying information of the remote user who performed the push. + +All CGI environment variables are available to each of the hooks +invoked by the 'git-receive-pack'. + +GIT +--- +Part of the linkgit:git[1] suite diff --git a/Documentation/git-http-fetch.txt b/Documentation/git-http-fetch.txt new file mode 100644 index 0000000..21a33d2 --- /dev/null +++ b/Documentation/git-http-fetch.txt @@ -0,0 +1,52 @@ +git-http-fetch(1) +================= + +NAME +---- +git-http-fetch - Download from a remote Git repository via HTTP + + +SYNOPSIS +-------- +[verse] +'git http-fetch' [-c] [-t] [-a] [-d] [-v] [-w filename] [--recover] [--stdin] <commit> <url> + +DESCRIPTION +----------- +Downloads a remote Git repository via HTTP. + +*NOTE*: use of this command without -a is deprecated. The -a +behaviour will become the default in a future release. + +OPTIONS +------- +commit-id:: + Either the hash or the filename under [URL]/refs/ to + pull. + +-c:: + Get the commit objects. +-t:: + Get trees associated with the commit objects. +-a:: + Get all the objects. +-v:: + Report what is downloaded. + +-w <filename>:: + Writes the commit-id into the filename under $GIT_DIR/refs/<filename> on + the local end after the transfer is complete. + +--stdin:: + Instead of a commit id on the command line (which is not expected in this + case), 'git http-fetch' expects lines on stdin in the format + + <commit-id>['\t'<filename-as-in--w>] + +--recover:: + Verify that everything reachable from target is fetched. Used after + an earlier fetch is interrupted. + +GIT +--- +Part of the linkgit:git[1] suite diff --git a/Documentation/git-http-push.txt b/Documentation/git-http-push.txt new file mode 100644 index 0000000..2e67362 --- /dev/null +++ b/Documentation/git-http-push.txt @@ -0,0 +1,97 @@ +git-http-push(1) +================ + +NAME +---- +git-http-push - Push objects over HTTP/DAV to another repository + + +SYNOPSIS +-------- +[verse] +'git http-push' [--all] [--dry-run] [--force] [--verbose] <url> <ref> [<ref>...] + +DESCRIPTION +----------- +Sends missing objects to remote repository, and updates the +remote branch. + +*NOTE*: This command is temporarily disabled if your libcurl +is older than 7.16, as the combination has been reported +not to work and sometimes corrupts repository. + +OPTIONS +------- +--all:: + Do not assume that the remote repository is complete in its + current state, and verify all objects in the entire local + ref's history exist in the remote repository. + +--force:: + Usually, the command refuses to update a remote ref that + is not an ancestor of the local ref used to overwrite it. + This flag disables the check. What this means is that + the remote repository can lose commits; use it with + care. + +--dry-run:: + Do everything except actually send the updates. + +--verbose:: + Report the list of objects being walked locally and the + list of objects successfully sent to the remote repository. + +-d:: +-D:: + Remove <ref> from remote repository. The specified branch + cannot be the remote HEAD. If -d is specified the following + other conditions must also be met: + + - Remote HEAD must resolve to an object that exists locally + - Specified branch resolves to an object that exists locally + - Specified branch is an ancestor of the remote HEAD + +<ref>...:: + The remote refs to update. + + +Specifying the Refs +------------------- + +A '<ref>' specification can be either a single pattern, or a pair +of such patterns separated by a colon ":" (this means that a ref name +cannot have a colon in it). A single pattern '<name>' is just a +shorthand for '<name>:<name>'. + +Each pattern pair consists of the source side (before the colon) +and the destination side (after the colon). The ref to be +pushed is determined by finding a match that matches the source +side, and where it is pushed is determined by using the +destination side. + + - It is an error if <src> does not match exactly one of the + local refs. + + - If <dst> does not match any remote ref, either + + * it has to start with "refs/"; <dst> is used as the + destination literally in this case. + + * <src> == <dst> and the ref that matched the <src> must not + exist in the set of remote refs; the ref matched <src> + locally is used as the name of the destination. + +Without '--force', the <src> ref is stored at the remote only if +<dst> does not exist, or <dst> is a proper subset (i.e. an +ancestor) of <src>. This check, known as "fast-forward check", +is performed in order to avoid accidentally overwriting the +remote ref and lose other peoples' commits from there. + +With '--force', the fast-forward check is disabled for all refs. + +Optionally, a <ref> parameter can be prefixed with a plus '+' sign +to disable the fast-forward check only on that ref. + +GIT +--- +Part of the linkgit:git[1] suite diff --git a/Documentation/git-imap-send.txt b/Documentation/git-imap-send.txt new file mode 100644 index 0000000..5d1e4c8 --- /dev/null +++ b/Documentation/git-imap-send.txt @@ -0,0 +1,183 @@ +git-imap-send(1) +================ + +NAME +---- +git-imap-send - Send a collection of patches from stdin to an IMAP folder + + +SYNOPSIS +-------- +[verse] +'git imap-send' [-v] [-q] [--[no-]curl] + + +DESCRIPTION +----------- +This command uploads a mailbox generated with 'git format-patch' +into an IMAP drafts folder. This allows patches to be sent as +other email is when using mail clients that cannot read mailbox +files directly. The command also works with any general mailbox +in which emails have the fields "From", "Date", and "Subject" in +that order. + +Typical usage is something like: + +git format-patch --signoff --stdout --attach origin | git imap-send + + +OPTIONS +------- + +-v:: +--verbose:: + Be verbose. + +-q:: +--quiet:: + Be quiet. + +--curl:: + Use libcurl to communicate with the IMAP server, unless tunneling + into it. Ignored if Git was built without the USE_CURL_FOR_IMAP_SEND + option set. + +--no-curl:: + Talk to the IMAP server using git's own IMAP routines instead of + using libcurl. Ignored if Git was built with the NO_OPENSSL option + set. + + +CONFIGURATION +------------- + +To use the tool, imap.folder and either imap.tunnel or imap.host must be set +to appropriate values. + +Variables +~~~~~~~~~ + +imap.folder:: + The folder to drop the mails into, which is typically the Drafts + folder. For example: "INBOX.Drafts", "INBOX/Drafts" or + "[Gmail]/Drafts". Required. + +imap.tunnel:: + Command used to setup a tunnel to the IMAP server through which + commands will be piped instead of using a direct network connection + to the server. Required when imap.host is not set. + +imap.host:: + A URL identifying the server. Use a `imap://` prefix for non-secure + connections and a `imaps://` prefix for secure connections. + Ignored when imap.tunnel is set, but required otherwise. + +imap.user:: + The username to use when logging in to the server. + +imap.pass:: + The password to use when logging in to the server. + +imap.port:: + An integer port number to connect to on the server. + Defaults to 143 for imap:// hosts and 993 for imaps:// hosts. + Ignored when imap.tunnel is set. + +imap.sslverify:: + A boolean to enable/disable verification of the server certificate + used by the SSL/TLS connection. Default is `true`. Ignored when + imap.tunnel is set. + +imap.preformattedHTML:: + A boolean to enable/disable the use of html encoding when sending + a patch. An html encoded patch will be bracketed with <pre> + and have a content type of text/html. Ironically, enabling this + option causes Thunderbird to send the patch as a plain/text, + format=fixed email. Default is `false`. + +imap.authMethod:: + Specify authenticate method for authentication with IMAP server. + If Git was built with the NO_CURL option, or if your curl version is older + than 7.34.0, or if you're running git-imap-send with the `--no-curl` + option, the only supported method is 'CRAM-MD5'. If this is not set + then 'git imap-send' uses the basic IMAP plaintext LOGIN command. + +Examples +~~~~~~~~ + +Using tunnel mode: + +.......................... +[imap] + folder = "INBOX.Drafts" + tunnel = "ssh -q -C user@example.com /usr/bin/imapd ./Maildir 2> /dev/null" +.......................... + +Using direct mode: + +......................... +[imap] + folder = "INBOX.Drafts" + host = imap://imap.example.com + user = bob + pass = p4ssw0rd +......................... + +Using direct mode with SSL: + +......................... +[imap] + folder = "INBOX.Drafts" + host = imaps://imap.example.com + user = bob + pass = p4ssw0rd + port = 123 + sslverify = false +......................... + + +EXAMPLE +------- +To submit patches using GMail's IMAP interface, first, edit your ~/.gitconfig +to specify your account settings: + +--------- +[imap] + folder = "[Gmail]/Drafts" + host = imaps://imap.gmail.com + user = user@gmail.com + port = 993 + sslverify = false +--------- + +You might need to instead use: folder = "[Google Mail]/Drafts" if you get an error +that the "Folder doesn't exist". + +Once the commits are ready to be sent, run the following command: + + $ git format-patch --cover-letter -M --stdout origin/master | git imap-send + +Just make sure to disable line wrapping in the email client (GMail's web +interface will wrap lines no matter what, so you need to use a real +IMAP client). + +CAUTION +------- +It is still your responsibility to make sure that the email message +sent by your email program meets the standards of your project. +Many projects do not like patches to be attached. Some mail +agents will transform patches (e.g. wrap lines, send them as +format=flowed) in ways that make them fail. You will get angry +flames ridiculing you if you don't check this. + +Thunderbird in particular is known to be problematic. Thunderbird +users may wish to visit this web page for more information: + http://kb.mozillazine.org/Plain_text_e-mail_-_Thunderbird#Completely_plain_email + +SEE ALSO +-------- +linkgit:git-format-patch[1], linkgit:git-send-email[1], mbox(5) + +GIT +--- +Part of the linkgit:git[1] suite diff --git a/Documentation/git-index-pack.txt b/Documentation/git-index-pack.txt new file mode 100644 index 0000000..7a4e055 --- /dev/null +++ b/Documentation/git-index-pack.txt @@ -0,0 +1,103 @@ +git-index-pack(1) +================= + +NAME +---- +git-index-pack - Build pack index file for an existing packed archive + + +SYNOPSIS +-------- +[verse] +'git index-pack' [-v] [-o <index-file>] <pack-file> +'git index-pack' --stdin [--fix-thin] [--keep] [-v] [-o <index-file>] + [<pack-file>] + + +DESCRIPTION +----------- +Reads a packed archive (.pack) from the specified file, and +builds a pack index file (.idx) for it. The packed archive +together with the pack index can then be placed in the +objects/pack/ directory of a Git repository. + + +OPTIONS +------- +-v:: + Be verbose about what is going on, including progress status. + +-o <index-file>:: + Write the generated pack index into the specified + file. Without this option the name of pack index + file is constructed from the name of packed archive + file by replacing .pack with .idx (and the program + fails if the name of packed archive does not end + with .pack). + +--stdin:: + When this flag is provided, the pack is read from stdin + instead and a copy is then written to <pack-file>. If + <pack-file> is not specified, the pack is written to + objects/pack/ directory of the current Git repository with + a default name determined from the pack content. If + <pack-file> is not specified consider using --keep to + prevent a race condition between this process and + 'git repack'. + +--fix-thin:: + Fix a "thin" pack produced by `git pack-objects --thin` (see + linkgit:git-pack-objects[1] for details) by adding the + excluded objects the deltified objects are based on to the + pack. This option only makes sense in conjunction with --stdin. + +--keep:: + Before moving the index into its final destination + create an empty .keep file for the associated pack file. + This option is usually necessary with --stdin to prevent a + simultaneous 'git repack' process from deleting + the newly constructed pack and index before refs can be + updated to use objects contained in the pack. + +--keep=<msg>:: + Like --keep create a .keep file before moving the index into + its final destination, but rather than creating an empty file + place '<msg>' followed by an LF into the .keep file. The '<msg>' + message can later be searched for within all .keep files to + locate any which have outlived their usefulness. + +--index-version=<version>[,<offset>]:: + This is intended to be used by the test suite only. It allows + to force the version for the generated pack index, and to force + 64-bit index entries on objects located above the given offset. + +--strict:: + Die, if the pack contains broken objects or links. + +--check-self-contained-and-connected:: + Die if the pack contains broken links. For internal use only. + +--threads=<n>:: + Specifies the number of threads to spawn when resolving + deltas. This requires that index-pack be compiled with + pthreads otherwise this option is ignored with a warning. + This is meant to reduce packing time on multiprocessor + machines. The required amount of memory for the delta search + window is however multiplied by the number of threads. + Specifying 0 will cause Git to auto-detect the number of CPU's + and use maximum 3 threads. + + +Note +---- + +Once the index has been created, the list of object names is sorted +and the SHA-1 hash of that list is printed to stdout. If --stdin was +also used then this is prefixed by either "pack\t", or "keep\t" if a +new .keep file was successfully created. This is useful to remove a +.keep file used as a lock to prevent the race with 'git repack' +mentioned above. + +GIT +--- +Part of the linkgit:git[1] suite diff --git a/Documentation/git-init-db.txt b/Documentation/git-init-db.txt new file mode 100644 index 0000000..648a6cd --- /dev/null +++ b/Documentation/git-init-db.txt @@ -0,0 +1,23 @@ +git-init-db(1) +============== + +NAME +---- +git-init-db - Creates an empty Git repository + + +SYNOPSIS +-------- +[verse] +'git init-db' [-q | --quiet] [--bare] [--template=<template_directory>] [--separate-git-dir <git dir>] [--shared[=<permissions>]] + + +DESCRIPTION +----------- + +This is a synonym for linkgit:git-init[1]. Please refer to the +documentation of that command. + +GIT +--- +Part of the linkgit:git[1] suite diff --git a/Documentation/git-init.txt b/Documentation/git-init.txt new file mode 100644 index 0000000..8174d27 --- /dev/null +++ b/Documentation/git-init.txt @@ -0,0 +1,153 @@ +git-init(1) +=========== + +NAME +---- +git-init - Create an empty Git repository or reinitialize an existing one + + +SYNOPSIS +-------- +[verse] +'git init' [-q | --quiet] [--bare] [--template=<template_directory>] + [--separate-git-dir <git dir>] + [--shared[=<permissions>]] [directory] + + +DESCRIPTION +----------- + +This command creates an empty Git repository - basically a `.git` +directory with subdirectories for `objects`, `refs/heads`, +`refs/tags`, and template files. An initial `HEAD` file that +references the HEAD of the master branch is also created. + +If the `$GIT_DIR` environment variable is set then it specifies a path +to use instead of `./.git` for the base of the repository. + +If the object storage directory is specified via the +`$GIT_OBJECT_DIRECTORY` environment variable then the sha1 directories +are created underneath - otherwise the default `$GIT_DIR/objects` +directory is used. + +Running 'git init' in an existing repository is safe. It will not +overwrite things that are already there. The primary reason for +rerunning 'git init' is to pick up newly added templates (or to move +the repository to another place if --separate-git-dir is given). + +OPTIONS +------- + +-- + +-q:: +--quiet:: + +Only print error and warning messages; all other output will be suppressed. + +--bare:: + +Create a bare repository. If GIT_DIR environment is not set, it is set to the +current working directory. + +--template=<template_directory>:: + +Specify the directory from which templates will be used. (See the "TEMPLATE +DIRECTORY" section below.) + +--separate-git-dir=<git dir>:: + +Instead of initializing the repository as a directory to either `$GIT_DIR` or +`./.git/`, create a text file there containing the path to the actual +repository. This file acts as filesystem-agnostic Git symbolic link to the +repository. ++ +If this is reinitialization, the repository will be moved to the specified path. + +--shared[=(false|true|umask|group|all|world|everybody|0xxx)]:: + +Specify that the Git repository is to be shared amongst several users. This +allows users belonging to the same group to push into that +repository. When specified, the config variable "core.sharedRepository" is +set so that files and directories under `$GIT_DIR` are created with the +requested permissions. When not specified, Git will use permissions reported +by umask(2). ++ +The option can have the following values, defaulting to 'group' if no value +is given: ++ +-- +'umask' (or 'false'):: + +Use permissions reported by umask(2). The default, when `--shared` is not +specified. + +'group' (or 'true'):: + +Make the repository group-writable, (and g+sx, since the git group may be not +the primary group of all users). This is used to loosen the permissions of an +otherwise safe umask(2) value. Note that the umask still applies to the other +permission bits (e.g. if umask is '0022', using 'group' will not remove read +privileges from other (non-group) users). See '0xxx' for how to exactly specify +the repository permissions. + +'all' (or 'world' or 'everybody'):: + +Same as 'group', but make the repository readable by all users. + +'0xxx':: + +'0xxx' is an octal number and each file will have mode '0xxx'. '0xxx' will +override users' umask(2) value (and not only loosen permissions as 'group' and +'all' does). '0640' will create a repository which is group-readable, but not +group-writable or accessible to others. '0660' will create a repo that is +readable and writable to the current user and group, but inaccessible to others. +-- + +By default, the configuration flag `receive.denyNonFastForwards` is enabled +in shared repositories, so that you cannot force a non fast-forwarding push +into it. + +If you provide a 'directory', the command is run inside it. If this directory +does not exist, it will be created. + +-- + +TEMPLATE DIRECTORY +------------------ + +The template directory contains files and directories that will be copied to +the `$GIT_DIR` after it is created. + +The template directory will be one of the following (in order): + + - the argument given with the `--template` option; + + - the contents of the `$GIT_TEMPLATE_DIR` environment variable; + + - the `init.templateDir` configuration variable; or + + - the default template directory: `/usr/share/git-core/templates`. + +The default template directory includes some directory structure, suggested +"exclude patterns" (see linkgit:gitignore[5]), and sample hook files (see linkgit:githooks[5]). + +EXAMPLES +-------- + +Start a new Git repository for an existing code base:: ++ +---------------- +$ cd /path/to/my/codebase +$ git init <1> +$ git add . <2> +$ git commit <3> +---------------- ++ +<1> Create a /path/to/my/codebase/.git directory. +<2> Add all existing files to the index. +<3> Record the pristine state as the first commit in the history. + +GIT +--- +Part of the linkgit:git[1] suite diff --git a/Documentation/git-instaweb.txt b/Documentation/git-instaweb.txt new file mode 100644 index 0000000..cc75b25 --- /dev/null +++ b/Documentation/git-instaweb.txt @@ -0,0 +1,93 @@ +git-instaweb(1) +=============== + +NAME +---- +git-instaweb - Instantly browse your working repository in gitweb + +SYNOPSIS +-------- +[verse] +'git instaweb' [--local] [--httpd=<httpd>] [--port=<port>] + [--browser=<browser>] +'git instaweb' [--start] [--stop] [--restart] + +DESCRIPTION +----------- +A simple script to set up `gitweb` and a web server for browsing the local +repository. + +OPTIONS +------- + +-l:: +--local:: + Only bind the web server to the local IP (127.0.0.1). + +-d:: +--httpd:: + The HTTP daemon command-line that will be executed. + Command-line options may be specified here, and the + configuration file will be added at the end of the command-line. + Currently apache2, lighttpd, mongoose, plackup and webrick are supported. + (Default: lighttpd) + +-m:: +--module-path:: + The module path (only needed if httpd is Apache). + (Default: /usr/lib/apache2/modules) + +-p:: +--port:: + The port number to bind the httpd to. (Default: 1234) + +-b:: +--browser:: + The web browser that should be used to view the gitweb + page. This will be passed to the 'git web{litdd}browse' helper + script along with the URL of the gitweb instance. See + linkgit:git-web{litdd}browse[1] for more information about this. If + the script fails, the URL will be printed to stdout. + +start:: +--start:: + Start the httpd instance and exit. Regenerate configuration files + as necessary for spawning a new instance. + +stop:: +--stop:: + Stop the httpd instance and exit. This does not generate + any of the configuration files for spawning a new instance, + nor does it close the browser. + +restart:: +--restart:: + Restart the httpd instance and exit. Regenerate configuration files + as necessary for spawning a new instance. + +CONFIGURATION +------------- + +You may specify configuration in your .git/config + +----------------------------------------------------------------------- +[instaweb] + local = true + httpd = apache2 -f + port = 4321 + browser = konqueror + modulePath = /usr/lib/apache2/modules + +----------------------------------------------------------------------- + +If the configuration variable 'instaweb.browser' is not set, +'web.browser' will be used instead if it is defined. See +linkgit:git-web{litdd}browse[1] for more information about this. + +SEE ALSO +-------- +linkgit:gitweb[1] + +GIT +--- +Part of the linkgit:git[1] suite diff --git a/Documentation/git-interpret-trailers.txt b/Documentation/git-interpret-trailers.txt new file mode 100644 index 0000000..a77b901 --- /dev/null +++ b/Documentation/git-interpret-trailers.txt @@ -0,0 +1,336 @@ +git-interpret-trailers(1) +========================= + +NAME +---- +git-interpret-trailers - help add structured information into commit messages + +SYNOPSIS +-------- +[verse] +'git interpret-trailers' [--in-place] [--trim-empty] [(--trailer <token>[(=|:)<value>])...] [<file>...] + +DESCRIPTION +----------- +Help adding 'trailers' lines, that look similar to RFC 822 e-mail +headers, at the end of the otherwise free-form part of a commit +message. + +This command reads some patches or commit messages from either the +<file> arguments or the standard input if no <file> is specified. Then +this command applies the arguments passed using the `--trailer` +option, if any, to the commit message part of each input file. The +result is emitted on the standard output. + +Some configuration variables control the way the `--trailer` arguments +are applied to each commit message and the way any existing trailer in +the commit message is changed. They also make it possible to +automatically add some trailers. + +By default, a '<token>=<value>' or '<token>:<value>' argument given +using `--trailer` will be appended after the existing trailers only if +the last trailer has a different (<token>, <value>) pair (or if there +is no existing trailer). The <token> and <value> parts will be trimmed +to remove starting and trailing whitespace, and the resulting trimmed +<token> and <value> will appear in the message like this: + +------------------------------------------------ +token: value +------------------------------------------------ + +This means that the trimmed <token> and <value> will be separated by +`': '` (one colon followed by one space). + +By default the new trailer will appear at the end of all the existing +trailers. If there is no existing trailer, the new trailer will appear +after the commit message part of the output, and, if there is no line +with only spaces at the end of the commit message part, one blank line +will be added before the new trailer. + +Existing trailers are extracted from the input message by looking for +a group of one or more lines that contain a colon (by default), where +the group is preceded by one or more empty (or whitespace-only) lines. +The group must either be at the end of the message or be the last +non-whitespace lines before a line that starts with '---'. Such three +minus signs start the patch part of the message. + +When reading trailers, there can be whitespaces before and after the +token, the separator and the value. There can also be whitespaces +inside the token and the value. + +Note that 'trailers' do not follow and are not intended to follow many +rules for RFC 822 headers. For example they do not follow the line +folding rules, the encoding rules and probably many other rules. + +OPTIONS +------- +--in-place:: + Edit the files in place. + +--trim-empty:: + If the <value> part of any trailer contains only whitespace, + the whole trailer will be removed from the resulting message. + This applies to existing trailers as well as new trailers. + +--trailer <token>[(=|:)<value>]:: + Specify a (<token>, <value>) pair that should be applied as a + trailer to the input messages. See the description of this + command. + +CONFIGURATION VARIABLES +----------------------- + +trailer.separators:: + This option tells which characters are recognized as trailer + separators. By default only ':' is recognized as a trailer + separator, except that '=' is always accepted on the command + line for compatibility with other git commands. ++ +The first character given by this option will be the default character +used when another separator is not specified in the config for this +trailer. ++ +For example, if the value for this option is "%=$", then only lines +using the format '<token><sep><value>' with <sep> containing '%', '=' +or '$' and then spaces will be considered trailers. And '%' will be +the default separator used, so by default trailers will appear like: +'<token>% <value>' (one percent sign and one space will appear between +the token and the value). + +trailer.where:: + This option tells where a new trailer will be added. ++ +This can be `end`, which is the default, `start`, `after` or `before`. ++ +If it is `end`, then each new trailer will appear at the end of the +existing trailers. ++ +If it is `start`, then each new trailer will appear at the start, +instead of the end, of the existing trailers. ++ +If it is `after`, then each new trailer will appear just after the +last trailer with the same <token>. ++ +If it is `before`, then each new trailer will appear just before the +first trailer with the same <token>. + +trailer.ifexists:: + This option makes it possible to choose what action will be + performed when there is already at least one trailer with the + same <token> in the message. ++ +The valid values for this option are: `addIfDifferentNeighbor` (this +is the default), `addIfDifferent`, `add`, `overwrite` or `doNothing`. ++ +With `addIfDifferentNeighbor`, a new trailer will be added only if no +trailer with the same (<token>, <value>) pair is above or below the line +where the new trailer will be added. ++ +With `addIfDifferent`, a new trailer will be added only if no trailer +with the same (<token>, <value>) pair is already in the message. ++ +With `add`, a new trailer will be added, even if some trailers with +the same (<token>, <value>) pair are already in the message. ++ +With `replace`, an existing trailer with the same <token> will be +deleted and the new trailer will be added. The deleted trailer will be +the closest one (with the same <token>) to the place where the new one +will be added. ++ +With `doNothing`, nothing will be done; that is no new trailer will be +added if there is already one with the same <token> in the message. + +trailer.ifmissing:: + This option makes it possible to choose what action will be + performed when there is not yet any trailer with the same + <token> in the message. ++ +The valid values for this option are: `add` (this is the default) and +`doNothing`. ++ +With `add`, a new trailer will be added. ++ +With `doNothing`, nothing will be done. + +trailer.<token>.key:: + This `key` will be used instead of <token> in the trailer. At + the end of this key, a separator can appear and then some + space characters. By default the only valid separator is ':', + but this can be changed using the `trailer.separators` config + variable. ++ +If there is a separator, then the key will be used instead of both the +<token> and the default separator when adding the trailer. + +trailer.<token>.where:: + This option takes the same values as the 'trailer.where' + configuration variable and it overrides what is specified by + that option for trailers with the specified <token>. + +trailer.<token>.ifexist:: + This option takes the same values as the 'trailer.ifexist' + configuration variable and it overrides what is specified by + that option for trailers with the specified <token>. + +trailer.<token>.ifmissing:: + This option takes the same values as the 'trailer.ifmissing' + configuration variable and it overrides what is specified by + that option for trailers with the specified <token>. + +trailer.<token>.command:: + This option can be used to specify a shell command that will + be called to automatically add or modify a trailer with the + specified <token>. ++ +When this option is specified, the behavior is as if a special +'<token>=<value>' argument were added at the beginning of the command +line, where <value> is taken to be the standard output of the +specified command with any leading and trailing whitespace trimmed +off. ++ +If the command contains the `$ARG` string, this string will be +replaced with the <value> part of an existing trailer with the same +<token>, if any, before the command is launched. ++ +If some '<token>=<value>' arguments are also passed on the command +line, when a 'trailer.<token>.command' is configured, the command will +also be executed for each of these arguments. And the <value> part of +these arguments, if any, will be used to replace the `$ARG` string in +the command. + +EXAMPLES +-------- + +* Configure a 'sign' trailer with a 'Signed-off-by' key, and then + add two of these trailers to a message: ++ +------------ +$ git config trailer.sign.key "Signed-off-by" +$ cat msg.txt +subject + +message +$ cat msg.txt | git interpret-trailers --trailer 'sign: Alice <alice@example.com>' --trailer 'sign: Bob <bob@example.com>' +subject + +message + +Signed-off-by: Alice <alice@example.com> +Signed-off-by: Bob <bob@example.com> +------------ + +* Use the '--in-place' option to edit a message file in place: ++ +------------ +$ cat msg.txt +subject + +message + +Signed-off-by: Bob <bob@example.com> +$ git interpret-trailers --trailer 'Acked-by: Alice <alice@example.com>' --in-place msg.txt +$ cat msg.txt +subject + +message + +Signed-off-by: Bob <bob@example.com> +Acked-by: Alice <alice@example.com> +------------ + +* Extract the last commit as a patch, and add a 'Cc' and a + 'Reviewed-by' trailer to it: ++ +------------ +$ git format-patch -1 +0001-foo.patch +$ git interpret-trailers --trailer 'Cc: Alice <alice@example.com>' --trailer 'Reviewed-by: Bob <bob@example.com>' 0001-foo.patch >0001-bar.patch +------------ + +* Configure a 'sign' trailer with a command to automatically add a + 'Signed-off-by: ' with the author information only if there is no + 'Signed-off-by: ' already, and show how it works: ++ +------------ +$ git config trailer.sign.key "Signed-off-by: " +$ git config trailer.sign.ifmissing add +$ git config trailer.sign.ifexists doNothing +$ git config trailer.sign.command 'echo "$(git config user.name) <$(git config user.email)>"' +$ git interpret-trailers <<EOF +> EOF + +Signed-off-by: Bob <bob@example.com> +$ git interpret-trailers <<EOF +> Signed-off-by: Alice <alice@example.com> +> EOF + +Signed-off-by: Alice <alice@example.com> +------------ + +* Configure a 'fix' trailer with a key that contains a '#' and no + space after this character, and show how it works: ++ +------------ +$ git config trailer.separators ":#" +$ git config trailer.fix.key "Fix #" +$ echo "subject" | git interpret-trailers --trailer fix=42 +subject + +Fix #42 +------------ + +* Configure a 'see' trailer with a command to show the subject of a + commit that is related, and show how it works: ++ +------------ +$ git config trailer.see.key "See-also: " +$ git config trailer.see.ifExists "replace" +$ git config trailer.see.ifMissing "doNothing" +$ git config trailer.see.command "git log -1 --oneline --format=\"%h (%s)\" --abbrev-commit --abbrev=14 \$ARG" +$ git interpret-trailers <<EOF +> subject +> +> message +> +> see: HEAD~2 +> EOF +subject + +message + +See-also: fe3187489d69c4 (subject of related commit) +------------ + +* Configure a commit template with some trailers with empty values + (using sed to show and keep the trailing spaces at the end of the + trailers), then configure a commit-msg hook that uses + 'git interpret-trailers' to remove trailers with empty values and + to add a 'git-version' trailer: ++ +------------ +$ sed -e 's/ Z$/ /' >commit_template.txt <<EOF +> ***subject*** +> +> ***message*** +> +> Fixes: Z +> Cc: Z +> Reviewed-by: Z +> Signed-off-by: Z +> EOF +$ git config commit.template commit_template.txt +$ cat >.git/hooks/commit-msg <<EOF +> #!/bin/sh +> git interpret-trailers --trim-empty --trailer "git-version: \$(git describe)" "\$1" > "\$1.new" +> mv "\$1.new" "\$1" +> EOF +$ chmod +x .git/hooks/commit-msg +------------ + +SEE ALSO +-------- +linkgit:git-commit[1], linkgit:git-format-patch[1], linkgit:git-config[1] + +GIT +--- +Part of the linkgit:git[1] suite diff --git a/Documentation/git-log.txt b/Documentation/git-log.txt new file mode 100644 index 0000000..03f9580 --- /dev/null +++ b/Documentation/git-log.txt @@ -0,0 +1,218 @@ +git-log(1) +========== + +NAME +---- +git-log - Show commit logs + + +SYNOPSIS +-------- +[verse] +'git log' [<options>] [<revision range>] [[\--] <path>...] + +DESCRIPTION +----------- +Shows the commit logs. + +The command takes options applicable to the `git rev-list` +command to control what is shown and how, and options applicable to +the `git diff-*` commands to control how the changes +each commit introduces are shown. + + +OPTIONS +------- + +--follow:: + Continue listing the history of a file beyond renames + (works only for a single file). + +--no-decorate:: +--decorate[=short|full|no]:: + Print out the ref names of any commits that are shown. If 'short' is + specified, the ref name prefixes 'refs/heads/', 'refs/tags/' and + 'refs/remotes/' will not be printed. If 'full' is specified, the + full ref name (including prefix) will be printed. The default option + is 'short'. + +--source:: + Print out the ref name given on the command line by which each + commit was reached. + +--use-mailmap:: + Use mailmap file to map author and committer names and email + addresses to canonical real names and email addresses. See + linkgit:git-shortlog[1]. + +--full-diff:: + Without this flag, `git log -p <path>...` shows commits that + touch the specified paths, and diffs about the same specified + paths. With this, the full diff is shown for commits that touch + the specified paths; this means that "<path>..." limits only + commits, and doesn't limit diff for those commits. ++ +Note that this affects all diff-based output types, e.g. those +produced by `--stat`, etc. + +--log-size:: + Include a line ``log size <number>'' in the output for each commit, + where <number> is the length of that commit's message in bytes. + Intended to speed up tools that read log messages from `git log` + output by allowing them to allocate space in advance. + +-L <start>,<end>:<file>:: +-L :<funcname>:<file>:: + Trace the evolution of the line range given by "<start>,<end>" + (or the function name regex <funcname>) within the <file>. You may + not give any pathspec limiters. This is currently limited to + a walk starting from a single revision, i.e., you may only + give zero or one positive revision arguments. + You can specify this option more than once. ++ +include::line-range-format.txt[] + +<revision range>:: + Show only commits in the specified revision range. When no + <revision range> is specified, it defaults to `HEAD` (i.e. the + whole history leading to the current commit). `origin..HEAD` + specifies all the commits reachable from the current commit + (i.e. `HEAD`), but not from `origin`. For a complete list of + ways to spell <revision range>, see the 'Specifying Ranges' + section of linkgit:gitrevisions[7]. + +[\--] <path>...:: + Show only commits that are enough to explain how the files + that match the specified paths came to be. See 'History + Simplification' below for details and other simplification + modes. ++ +Paths may need to be prefixed with ``\-- '' to separate them from +options or the revision range, when confusion arises. + +include::rev-list-options.txt[] + +include::pretty-formats.txt[] + +COMMON DIFF OPTIONS +------------------- + +:git-log: 1 +include::diff-options.txt[] + +include::diff-generate-patch.txt[] + +EXAMPLES +-------- +`git log --no-merges`:: + + Show the whole commit history, but skip any merges + +`git log v2.6.12.. include/scsi drivers/scsi`:: + + Show all commits since version 'v2.6.12' that changed any file + in the `include/scsi` or `drivers/scsi` subdirectories + +`git log --since="2 weeks ago" -- gitk`:: + + Show the changes during the last two weeks to the file 'gitk'. + The ``--'' is necessary to avoid confusion with the *branch* named + 'gitk' + +`git log --name-status release..test`:: + + Show the commits that are in the "test" branch but not yet + in the "release" branch, along with the list of paths + each commit modifies. + +`git log --follow builtin/rev-list.c`:: + + Shows the commits that changed `builtin/rev-list.c`, including + those commits that occurred before the file was given its + present name. + +`git log --branches --not --remotes=origin`:: + + Shows all commits that are in any of local branches but not in + any of remote-tracking branches for 'origin' (what you have that + origin doesn't). + +`git log master --not --remotes=*/master`:: + + Shows all commits that are in local master but not in any remote + repository master branches. + +`git log -p -m --first-parent`:: + + Shows the history including change diffs, but only from the + ``main branch'' perspective, skipping commits that come from merged + branches, and showing full diffs of changes introduced by the merges. + This makes sense only when following a strict policy of merging all + topic branches when staying on a single integration branch. + +`git log -L '/int main/',/^}/:main.c`:: + + Shows how the function `main()` in the file `main.c` evolved + over time. + +`git log -3`:: + + Limits the number of commits to show to 3. + +DISCUSSION +---------- + +include::i18n.txt[] + +CONFIGURATION +------------- + +See linkgit:git-config[1] for core variables and linkgit:git-diff[1] +for settings related to diff generation. + +format.pretty:: + Default for the `--format` option. (See 'Pretty Formats' above.) + Defaults to `medium`. + +i18n.logOutputEncoding:: + Encoding to use when displaying logs. (See 'Discussion' above.) + Defaults to the value of `i18n.commitEncoding` if set, and UTF-8 + otherwise. + +log.date:: + Default format for human-readable dates. (Compare the + `--date` option.) Defaults to "default", which means to write + dates like `Sat May 8 19:35:34 2010 -0500`. + +log.follow:: + If `true`, `git log` will act as if the `--follow` option was used when + a single <path> is given. This has the same limitations as `--follow`, + i.e. it cannot be used to follow multiple files and does not work well + on non-linear history. + +log.showRoot:: + If `false`, `git log` and related commands will not treat the + initial commit as a big creation event. Any root commits in + `git log -p` output would be shown without a diff attached. + The default is `true`. + +mailmap.*:: + See linkgit:git-shortlog[1]. + +notes.displayRef:: + Which refs, in addition to the default set by `core.notesRef` + or 'GIT_NOTES_REF', to read notes from when showing commit + messages with the `log` family of commands. See + linkgit:git-notes[1]. ++ +May be an unabbreviated ref name or a glob and may be specified +multiple times. A warning will be issued for refs that do not exist, +but a glob that does not match any refs is silently ignored. ++ +This setting can be disabled by the `--no-notes` option, +overridden by the 'GIT_NOTES_DISPLAY_REF' environment variable, +and overridden by the `--notes=<ref>` option. + +GIT +--- +Part of the linkgit:git[1] suite diff --git a/Documentation/git-ls-files.txt b/Documentation/git-ls-files.txt new file mode 100644 index 0000000..75c3f41 --- /dev/null +++ b/Documentation/git-ls-files.txt @@ -0,0 +1,236 @@ +git-ls-files(1) +=============== + +NAME +---- +git-ls-files - Show information about files in the index and the working tree + + +SYNOPSIS +-------- +[verse] +'git ls-files' [-z] [-t] [-v] + (--[cached|deleted|others|ignored|stage|unmerged|killed|modified])* + (-[c|d|o|i|s|u|k|m])* + [--eol] + [-x <pattern>|--exclude=<pattern>] + [-X <file>|--exclude-from=<file>] + [--exclude-per-directory=<file>] + [--exclude-standard] + [--error-unmatch] [--with-tree=<tree-ish>] + [--full-name] [--abbrev] [--] [<file>...] + +DESCRIPTION +----------- +This merges the file listing in the directory cache index with the +actual working directory list, and shows different combinations of the +two. + +One or more of the options below may be used to determine the files +shown: + +OPTIONS +------- +-c:: +--cached:: + Show cached files in the output (default) + +-d:: +--deleted:: + Show deleted files in the output + +-m:: +--modified:: + Show modified files in the output + +-o:: +--others:: + Show other (i.e. untracked) files in the output + +-i:: +--ignored:: + Show only ignored files in the output. When showing files in the + index, print only those matched by an exclude pattern. When + showing "other" files, show only those matched by an exclude + pattern. + +-s:: +--stage:: + Show staged contents' object name, mode bits and stage number in the output. + +--directory:: + If a whole directory is classified as "other", show just its + name (with a trailing slash) and not its whole contents. + +--no-empty-directory:: + Do not list empty directories. Has no effect without --directory. + +-u:: +--unmerged:: + Show unmerged files in the output (forces --stage) + +-k:: +--killed:: + Show files on the filesystem that need to be removed due + to file/directory conflicts for checkout-index to + succeed. + +-z:: + \0 line termination on output. + +-x <pattern>:: +--exclude=<pattern>:: + Skip untracked files matching pattern. + Note that pattern is a shell wildcard pattern. See EXCLUDE PATTERNS + below for more information. + +-X <file>:: +--exclude-from=<file>:: + Read exclude patterns from <file>; 1 per line. + +--exclude-per-directory=<file>:: + Read additional exclude patterns that apply only to the + directory and its subdirectories in <file>. + +--exclude-standard:: + Add the standard Git exclusions: .git/info/exclude, .gitignore + in each directory, and the user's global exclusion file. + +--error-unmatch:: + If any <file> does not appear in the index, treat this as an + error (return 1). + +--with-tree=<tree-ish>:: + When using --error-unmatch to expand the user supplied + <file> (i.e. path pattern) arguments to paths, pretend + that paths which were removed in the index since the + named <tree-ish> are still present. Using this option + with `-s` or `-u` options does not make any sense. + +-t:: + This feature is semi-deprecated. For scripting purpose, + linkgit:git-status[1] `--porcelain` and + linkgit:git-diff-files[1] `--name-status` are almost always + superior alternatives, and users should look at + linkgit:git-status[1] `--short` or linkgit:git-diff[1] + `--name-status` for more user-friendly alternatives. ++ +This option identifies the file status with the following tags (followed by +a space) at the start of each line: + + H:: cached + S:: skip-worktree + M:: unmerged + R:: removed/deleted + C:: modified/changed + K:: to be killed + ?:: other + +-v:: + Similar to `-t`, but use lowercase letters for files + that are marked as 'assume unchanged' (see + linkgit:git-update-index[1]). + +--full-name:: + When run from a subdirectory, the command usually + outputs paths relative to the current directory. This + option forces paths to be output relative to the project + top directory. + +--abbrev[=<n>]:: + Instead of showing the full 40-byte hexadecimal object + lines, show only a partial prefix. + Non default number of digits can be specified with --abbrev=<n>. + +--debug:: + After each line that describes a file, add more data about its + cache entry. This is intended to show as much information as + possible for manual inspection; the exact format may change at + any time. + +--eol:: + Show <eolinfo> and <eolattr> of files. + <eolinfo> is the file content identification used by Git when + the "text" attribute is "auto" (or not set and core.autocrlf is not false). + <eolinfo> is either "-text", "none", "lf", "crlf", "mixed" or "". ++ +"" means the file is not a regular file, it is not in the index or +not accessible in the working tree. ++ +<eolattr> is the attribute that is used when checking out or committing, +it is either "", "-text", "text", "text=auto", "text eol=lf", "text eol=crlf". +Note: Currently Git does not support "text=auto eol=lf" or "text=auto eol=crlf", +that may change in the future. ++ +Both the <eolinfo> in the index ("i/<eolinfo>") +and in the working tree ("w/<eolinfo>") are shown for regular files, +followed by the ("attr/<eolattr>"). + +\--:: + Do not interpret any more arguments as options. + +<file>:: + Files to show. If no files are given all files which match the other + specified criteria are shown. + +Output +------ +'git ls-files' just outputs the filenames unless '--stage' is specified in +which case it outputs: + + [<tag> ]<mode> <object> <stage> <file> + +'git ls-files --eol' will show + i/<eolinfo><SPACES>w/<eolinfo><SPACES>attr/<eolattr><SPACE*><TAB><file> + +'git ls-files --unmerged' and 'git ls-files --stage' can be used to examine +detailed information on unmerged paths. + +For an unmerged path, instead of recording a single mode/SHA-1 pair, +the index records up to three such pairs; one from tree O in stage +1, A in stage 2, and B in stage 3. This information can be used by +the user (or the porcelain) to see what should eventually be recorded at the +path. (see linkgit:git-read-tree[1] for more information on state) + +When `-z` option is not used, TAB, LF, and backslash characters +in pathnames are represented as `\t`, `\n`, and `\\`, +respectively. + + +Exclude Patterns +---------------- + +'git ls-files' can use a list of "exclude patterns" when +traversing the directory tree and finding files to show when the +flags --others or --ignored are specified. linkgit:gitignore[5] +specifies the format of exclude patterns. + +These exclude patterns come from these places, in order: + + 1. The command-line flag --exclude=<pattern> specifies a + single pattern. Patterns are ordered in the same order + they appear in the command line. + + 2. The command-line flag --exclude-from=<file> specifies a + file containing a list of patterns. Patterns are ordered + in the same order they appear in the file. + + 3. The command-line flag --exclude-per-directory=<name> specifies + a name of the file in each directory 'git ls-files' + examines, normally `.gitignore`. Files in deeper + directories take precedence. Patterns are ordered in the + same order they appear in the files. + +A pattern specified on the command line with --exclude or read +from the file specified with --exclude-from is relative to the +top of the directory tree. A pattern read from a file specified +by --exclude-per-directory is relative to the directory that the +pattern file appears in. + +SEE ALSO +-------- +linkgit:git-read-tree[1], linkgit:gitignore[5] + +GIT +--- +Part of the linkgit:git[1] suite diff --git a/Documentation/git-ls-remote.txt b/Documentation/git-ls-remote.txt new file mode 100644 index 0000000..5f2628c --- /dev/null +++ b/Documentation/git-ls-remote.txt @@ -0,0 +1,95 @@ +git-ls-remote(1) +================ + +NAME +---- +git-ls-remote - List references in a remote repository + + +SYNOPSIS +-------- +[verse] +'git ls-remote' [--heads] [--tags] [--refs] [--upload-pack=<exec>] + [-q | --quiet] [--exit-code] [--get-url] + [--symref] [<repository> [<refs>...]] + +DESCRIPTION +----------- +Displays references available in a remote repository along with the associated +commit IDs. + + +OPTIONS +------- +-h:: +--heads:: +-t:: +--tags:: + Limit to only refs/heads and refs/tags, respectively. + These options are _not_ mutually exclusive; when given + both, references stored in refs/heads and refs/tags are + displayed. + +--refs:: + Do not show peeled tags or pseudorefs like HEAD in the output. + +-q:: +--quiet:: + Do not print remote URL to stderr. + +--upload-pack=<exec>:: + Specify the full path of 'git-upload-pack' on the remote + host. This allows listing references from repositories accessed via + SSH and where the SSH daemon does not use the PATH configured by the + user. + +--exit-code:: + Exit with status "2" when no matching refs are found in the remote + repository. Usually the command exits with status "0" to indicate + it successfully talked with the remote repository, whether it + found any matching refs. + +--get-url:: + Expand the URL of the given remote repository taking into account any + "url.<base>.insteadOf" config setting (See linkgit:git-config[1]) and + exit without talking to the remote. + +--symref:: + In addition to the object pointed by it, show the underlying + ref pointed by it when showing a symbolic ref. Currently, + upload-pack only shows the symref HEAD, so it will be the only + one shown by ls-remote. + +<repository>:: + The "remote" repository to query. This parameter can be + either a URL or the name of a remote (see the GIT URLS and + REMOTES sections of linkgit:git-fetch[1]). + +<refs>...:: + When unspecified, all references, after filtering done + with --heads and --tags, are shown. When <refs>... are + specified, only references matching the given patterns + are displayed. + +EXAMPLES +-------- + + $ git ls-remote --tags ./. + d6602ec5194c87b0fc87103ca4d67251c76f233a refs/tags/v0.99 + f25a265a342aed6041ab0cc484224d9ca54b6f41 refs/tags/v0.99.1 + 7ceca275d047c90c0c7d5afb13ab97efdf51bd6e refs/tags/v0.99.3 + c5db5456ae3b0873fc659c19fafdde22313cc441 refs/tags/v0.99.2 + 0918385dbd9656cab0d1d81ba7453d49bbc16250 refs/tags/junio-gpg-pub + $ git ls-remote http://www.kernel.org/pub/scm/git/git.git master pu rc + 5fe978a5381f1fbad26a80e682ddd2a401966740 refs/heads/master + c781a84b5204fb294c9ccc79f8b3baceeb32c061 refs/heads/pu + $ git remote add korg http://www.kernel.org/pub/scm/git/git.git + $ git ls-remote --tags korg v\* + d6602ec5194c87b0fc87103ca4d67251c76f233a refs/tags/v0.99 + f25a265a342aed6041ab0cc484224d9ca54b6f41 refs/tags/v0.99.1 + c5db5456ae3b0873fc659c19fafdde22313cc441 refs/tags/v0.99.2 + 7ceca275d047c90c0c7d5afb13ab97efdf51bd6e refs/tags/v0.99.3 + +GIT +--- +Part of the linkgit:git[1] suite diff --git a/Documentation/git-ls-tree.txt b/Documentation/git-ls-tree.txt new file mode 100644 index 0000000..16e87fd --- /dev/null +++ b/Documentation/git-ls-tree.txt @@ -0,0 +1,100 @@ +git-ls-tree(1) +============== + +NAME +---- +git-ls-tree - List the contents of a tree object + + +SYNOPSIS +-------- +[verse] +'git ls-tree' [-d] [-r] [-t] [-l] [-z] + [--name-only] [--name-status] [--full-name] [--full-tree] [--abbrev[=<n>]] + <tree-ish> [<path>...] + +DESCRIPTION +----------- +Lists the contents of a given tree object, like what "/bin/ls -a" does +in the current working directory. Note that: + + - the behaviour is slightly different from that of "/bin/ls" in that the + '<path>' denotes just a list of patterns to match, e.g. so specifying + directory name (without '-r') will behave differently, and order of the + arguments does not matter. + + - the behaviour is similar to that of "/bin/ls" in that the '<path>' is + taken as relative to the current working directory. E.g. when you are + in a directory 'sub' that has a directory 'dir', you can run 'git + ls-tree -r HEAD dir' to list the contents of the tree (that is + 'sub/dir' in 'HEAD'). You don't want to give a tree that is not at the + root level (e.g. `git ls-tree -r HEAD:sub dir`) in this case, as that + would result in asking for 'sub/sub/dir' in the 'HEAD' commit. + However, the current working directory can be ignored by passing + --full-tree option. + +OPTIONS +------- +<tree-ish>:: + Id of a tree-ish. + +-d:: + Show only the named tree entry itself, not its children. + +-r:: + Recurse into sub-trees. + +-t:: + Show tree entries even when going to recurse them. Has no effect + if '-r' was not passed. '-d' implies '-t'. + +-l:: +--long:: + Show object size of blob (file) entries. + +-z:: + \0 line termination on output. + +--name-only:: +--name-status:: + List only filenames (instead of the "long" output), one per line. + +--abbrev[=<n>]:: + Instead of showing the full 40-byte hexadecimal object + lines, show only a partial prefix. + Non default number of digits can be specified with --abbrev=<n>. + +--full-name:: + Instead of showing the path names relative to the current working + directory, show the full path names. + +--full-tree:: + Do not limit the listing to the current working directory. + Implies --full-name. + +[<path>...]:: + When paths are given, show them (note that this isn't really raw + pathnames, but rather a list of patterns to match). Otherwise + implicitly uses the root level of the tree as the sole path argument. + + +Output Format +------------- + <mode> SP <type> SP <object> TAB <file> + +Unless the `-z` option is used, TAB, LF, and backslash characters +in pathnames are represented as `\t`, `\n`, and `\\`, respectively. +This output format is compatible with what `--index-info --stdin` of +'git update-index' expects. + +When the `-l` option is used, format changes to + + <mode> SP <type> SP <object> SP <object size> TAB <file> + +Object size identified by <object> is given in bytes, and right-justified +with minimum width of 7 characters. Object size is given only for blobs +(file) entries; for other entries `-` character is used in place of size. + +GIT +--- +Part of the linkgit:git[1] suite diff --git a/Documentation/git-mailinfo.txt b/Documentation/git-mailinfo.txt new file mode 100644 index 0000000..3bbc731 --- /dev/null +++ b/Documentation/git-mailinfo.txt @@ -0,0 +1,102 @@ +git-mailinfo(1) +=============== + +NAME +---- +git-mailinfo - Extracts patch and authorship from a single e-mail message + + +SYNOPSIS +-------- +[verse] +'git mailinfo' [-k|-b] [-u | --encoding=<encoding> | -n] [--[no-]scissors] <msg> <patch> + + +DESCRIPTION +----------- +Reads a single e-mail message from the standard input, and +writes the commit log message in <msg> file, and the patches in +<patch> file. The author name, e-mail and e-mail subject are +written out to the standard output to be used by 'git am' +to create a commit. It is usually not necessary to use this +command directly. See linkgit:git-am[1] instead. + + +OPTIONS +------- +-k:: + Usually the program removes email cruft from the Subject: + header line to extract the title line for the commit log + message. This option prevents this munging, and is most + useful when used to read back 'git format-patch -k' output. ++ +Specifically, the following are removed until none of them remain: ++ +-- +* Leading and trailing whitespace. + +* Leading `Re:`, `re:`, and `:`. + +* Leading bracketed strings (between `[` and `]`, usually + `[PATCH]`). +-- ++ +Finally, runs of whitespace are normalized to a single ASCII space +character. + +-b:: + When -k is not in effect, all leading strings bracketed with '[' + and ']' pairs are stripped. This option limits the stripping to + only the pairs whose bracketed string contains the word "PATCH". + +-u:: + The commit log message, author name and author email are + taken from the e-mail, and after minimally decoding MIME + transfer encoding, re-coded in the charset specified by + i18n.commitencoding (defaulting to UTF-8) by transliterating + them. This used to be optional but now it is the default. ++ +Note that the patch is always used as-is without charset +conversion, even with this flag. + +--encoding=<encoding>:: + Similar to -u. But when re-coding, the charset specified here is + used instead of the one specified by i18n.commitencoding or UTF-8. + +-n:: + Disable all charset re-coding of the metadata. + +-m:: +--message-id:: + Copy the Message-ID header at the end of the commit message. This + is useful in order to associate commits with mailing list discussions. + +--scissors:: + Remove everything in body before a scissors line. A line that + mainly consists of scissors (either ">8" or "8<") and perforation + (dash "-") marks is called a scissors line, and is used to request + the reader to cut the message at that line. If such a line + appears in the body of the message before the patch, everything + before it (including the scissors line itself) is ignored when + this option is used. ++ +This is useful if you want to begin your message in a discussion thread +with comments and suggestions on the message you are responding to, and to +conclude it with a patch submission, separating the discussion and the +beginning of the proposed commit log message with a scissors line. ++ +This can be enabled by default with the configuration option mailinfo.scissors. + +--no-scissors:: + Ignore scissors lines. Useful for overriding mailinfo.scissors settings. + +<msg>:: + The commit log message extracted from e-mail, usually + except the title line which comes from e-mail Subject. + +<patch>:: + The patch extracted from e-mail. + +GIT +--- +Part of the linkgit:git[1] suite diff --git a/Documentation/git-mailsplit.txt b/Documentation/git-mailsplit.txt new file mode 100644 index 0000000..4d1b871 --- /dev/null +++ b/Documentation/git-mailsplit.txt @@ -0,0 +1,52 @@ +git-mailsplit(1) +================ + +NAME +---- +git-mailsplit - Simple UNIX mbox splitter program + +SYNOPSIS +-------- +[verse] +'git mailsplit' [-b] [-f<nn>] [-d<prec>] [--keep-cr] -o<directory> [--] [(<mbox>|<Maildir>)...] + +DESCRIPTION +----------- +Splits a mbox file or a Maildir into a list of files: "0001" "0002" .. in the +specified directory so you can process them further from there. + +IMPORTANT: Maildir splitting relies upon filenames being sorted to output +patches in the correct order. + +OPTIONS +------- +<mbox>:: + Mbox file to split. If not given, the mbox is read from + the standard input. + +<Maildir>:: + Root of the Maildir to split. This directory should contain the cur, tmp + and new subdirectories. + +-o<directory>:: + Directory in which to place the individual messages. + +-b:: + If any file doesn't begin with a From line, assume it is a + single mail message instead of signaling error. + +-d<prec>:: + Instead of the default 4 digits with leading zeros, + different precision can be specified for the generated + filenames. + +-f<nn>:: + Skip the first <nn> numbers, for example if -f3 is specified, + start the numbering with 0004. + +--keep-cr:: + Do not remove `\r` from lines ending with `\r\n`. + +GIT +--- +Part of the linkgit:git[1] suite diff --git a/Documentation/git-merge-base.txt b/Documentation/git-merge-base.txt new file mode 100644 index 0000000..808426f --- /dev/null +++ b/Documentation/git-merge-base.txt @@ -0,0 +1,183 @@ +git-merge-base(1) +================= + +NAME +---- +git-merge-base - Find as good common ancestors as possible for a merge + + +SYNOPSIS +-------- +[verse] +'git merge-base' [-a|--all] <commit> <commit>... +'git merge-base' [-a|--all] --octopus <commit>... +'git merge-base' --is-ancestor <commit> <commit> +'git merge-base' --independent <commit>... +'git merge-base' --fork-point <ref> [<commit>] + +DESCRIPTION +----------- + +'git merge-base' finds best common ancestor(s) between two commits to use +in a three-way merge. One common ancestor is 'better' than another common +ancestor if the latter is an ancestor of the former. A common ancestor +that does not have any better common ancestor is a 'best common +ancestor', i.e. a 'merge base'. Note that there can be more than one +merge base for a pair of commits. + +OPERATION MODES +--------------- + +As the most common special case, specifying only two commits on the +command line means computing the merge base between the given two commits. + +More generally, among the two commits to compute the merge base from, +one is specified by the first commit argument on the command line; +the other commit is a (possibly hypothetical) commit that is a merge +across all the remaining commits on the command line. + +As a consequence, the 'merge base' is not necessarily contained in each of the +commit arguments if more than two commits are specified. This is different +from linkgit:git-show-branch[1] when used with the `--merge-base` option. + +--octopus:: + Compute the best common ancestors of all supplied commits, + in preparation for an n-way merge. This mimics the behavior + of 'git show-branch --merge-base'. + +--independent:: + Instead of printing merge bases, print a minimal subset of + the supplied commits with the same ancestors. In other words, + among the commits given, list those which cannot be reached + from any other. This mimics the behavior of 'git show-branch + --independent'. + +--is-ancestor:: + Check if the first <commit> is an ancestor of the second <commit>, + and exit with status 0 if true, or with status 1 if not. + Errors are signaled by a non-zero status that is not 1. + +--fork-point:: + Find the point at which a branch (or any history that leads + to <commit>) forked from another branch (or any reference) + <ref>. This does not just look for the common ancestor of + the two commits, but also takes into account the reflog of + <ref> to see if the history leading to <commit> forked from + an earlier incarnation of the branch <ref> (see discussion + on this mode below). + +OPTIONS +------- +-a:: +--all:: + Output all merge bases for the commits, instead of just one. + +DISCUSSION +---------- + +Given two commits 'A' and 'B', `git merge-base A B` will output a commit +which is reachable from both 'A' and 'B' through the parent relationship. + +For example, with this topology: + + o---o---o---B + / + ---o---1---o---o---o---A + +the merge base between 'A' and 'B' is '1'. + +Given three commits 'A', 'B' and 'C', `git merge-base A B C` will compute the +merge base between 'A' and a hypothetical commit 'M', which is a merge +between 'B' and 'C'. For example, with this topology: + + o---o---o---o---C + / + / o---o---o---B + / / + ---2---1---o---o---o---A + +the result of `git merge-base A B C` is '1'. This is because the +equivalent topology with a merge commit 'M' between 'B' and 'C' is: + + + o---o---o---o---o + / \ + / o---o---o---o---M + / / + ---2---1---o---o---o---A + +and the result of `git merge-base A M` is '1'. Commit '2' is also a +common ancestor between 'A' and 'M', but '1' is a better common ancestor, +because '2' is an ancestor of '1'. Hence, '2' is not a merge base. + +The result of `git merge-base --octopus A B C` is '2', because '2' is +the best common ancestor of all commits. + +When the history involves criss-cross merges, there can be more than one +'best' common ancestor for two commits. For example, with this topology: + + ---1---o---A + \ / + X + / \ + ---2---o---o---B + +both '1' and '2' are merge-bases of A and B. Neither one is better than +the other (both are 'best' merge bases). When the `--all` option is not given, +it is unspecified which best one is output. + +A common idiom to check "fast-forward-ness" between two commits A +and B is (or at least used to be) to compute the merge base between +A and B, and check if it is the same as A, in which case, A is an +ancestor of B. You will see this idiom used often in older scripts. + + A=$(git rev-parse --verify A) + if test "$A" = "$(git merge-base A B)" + then + ... A is an ancestor of B ... + fi + +In modern git, you can say this in a more direct way: + + if git merge-base --is-ancestor A B + then + ... A is an ancestor of B ... + fi + +instead. + +Discussion on fork-point mode +----------------------------- + +After working on the `topic` branch created with `git checkout -b +topic origin/master`, the history of remote-tracking branch +`origin/master` may have been rewound and rebuilt, leading to a +history of this shape: + + o---B1 + / + ---o---o---B2--o---o---o---B (origin/master) + \ + B3 + \ + Derived (topic) + +where `origin/master` used to point at commits B3, B2, B1 and now it +points at B, and your `topic` branch was started on top of it back +when `origin/master` was at B3. This mode uses the reflog of +`origin/master` to find B3 as the fork point, so that the `topic` +can be rebased on top of the updated `origin/master` by: + + $ fork_point=$(git merge-base --fork-point origin/master topic) + $ git rebase --onto origin/master $fork_point topic + + +See also +-------- +linkgit:git-rev-list[1], +linkgit:git-show-branch[1], +linkgit:git-merge[1] + +GIT +--- +Part of the linkgit:git[1] suite diff --git a/Documentation/git-merge-file.txt b/Documentation/git-merge-file.txt new file mode 100644 index 0000000..f856032 --- /dev/null +++ b/Documentation/git-merge-file.txt @@ -0,0 +1,95 @@ +git-merge-file(1) +================= + +NAME +---- +git-merge-file - Run a three-way file merge + + +SYNOPSIS +-------- +[verse] +'git merge-file' [-L <current-name> [-L <base-name> [-L <other-name>]]] + [--ours|--theirs|--union] [-p|--stdout] [-q|--quiet] [--marker-size=<n>] + [--[no-]diff3] <current-file> <base-file> <other-file> + + +DESCRIPTION +----------- +'git merge-file' incorporates all changes that lead from the `<base-file>` +to `<other-file>` into `<current-file>`. The result ordinarily goes into +`<current-file>`. 'git merge-file' is useful for combining separate changes +to an original. Suppose `<base-file>` is the original, and both +`<current-file>` and `<other-file>` are modifications of `<base-file>`, +then 'git merge-file' combines both changes. + +A conflict occurs if both `<current-file>` and `<other-file>` have changes +in a common segment of lines. If a conflict is found, 'git merge-file' +normally outputs a warning and brackets the conflict with lines containing +<<<<<<< and >>>>>>> markers. A typical conflict will look like this: + + <<<<<<< A + lines in file A + ======= + lines in file B + >>>>>>> B + +If there are conflicts, the user should edit the result and delete one of +the alternatives. When `--ours`, `--theirs`, or `--union` option is in effect, +however, these conflicts are resolved favouring lines from `<current-file>`, +lines from `<other-file>`, or lines from both respectively. The length of the +conflict markers can be given with the `--marker-size` option. + +The exit value of this program is negative on error, and the number of +conflicts otherwise (truncated to 127 if there are more than that many +conflicts). If the merge was clean, the exit value is 0. + +'git merge-file' is designed to be a minimal clone of RCS 'merge'; that is, it +implements all of RCS 'merge''s functionality which is needed by +linkgit:git[1]. + + +OPTIONS +------- + +-L <label>:: + This option may be given up to three times, and + specifies labels to be used in place of the + corresponding file names in conflict reports. That is, + `git merge-file -L x -L y -L z a b c` generates output that + looks like it came from files x, y and z instead of + from files a, b and c. + +-p:: + Send results to standard output instead of overwriting + `<current-file>`. + +-q:: + Quiet; do not warn about conflicts. + +--diff3:: + Show conflicts in "diff3" style. + +--ours:: +--theirs:: +--union:: + Instead of leaving conflicts in the file, resolve conflicts + favouring our (or their or both) side of the lines. + + +EXAMPLES +-------- + +`git merge-file README.my README README.upstream`:: + + combines the changes of README.my and README.upstream since README, + tries to merge them and writes the result into README.my. + +`git merge-file -L a -L b -L c tmp/a123 tmp/b234 tmp/c345`:: + + merges tmp/a123 and tmp/c345 with the base tmp/b234, but uses labels + `a` and `c` instead of `tmp/a123` and `tmp/c345`. + +GIT +--- +Part of the linkgit:git[1] suite diff --git a/Documentation/git-merge-index.txt b/Documentation/git-merge-index.txt new file mode 100644 index 0000000..02676fb --- /dev/null +++ b/Documentation/git-merge-index.txt @@ -0,0 +1,79 @@ +git-merge-index(1) +================== + +NAME +---- +git-merge-index - Run a merge for files needing merging + + +SYNOPSIS +-------- +[verse] +'git merge-index' [-o] [-q] <merge-program> (-a | [--] <file>*) + +DESCRIPTION +----------- +This looks up the <file>(s) in the index and, if there are any merge +entries, passes the SHA-1 hash for those files as arguments 1, 2, 3 (empty +argument if no file), and <file> as argument 4. File modes for the three +files are passed as arguments 5, 6 and 7. + +OPTIONS +------- +\--:: + Do not interpret any more arguments as options. + +-a:: + Run merge against all files in the index that need merging. + +-o:: + Instead of stopping at the first failed merge, do all of them + in one shot - continue with merging even when previous merges + returned errors, and only return the error code after all the + merges. + +-q:: + Do not complain about a failed merge program (a merge program + failure usually indicates conflicts during the merge). This is for + porcelains which might want to emit custom messages. + +If 'git merge-index' is called with multiple <file>s (or -a) then it +processes them in turn only stopping if merge returns a non-zero exit +code. + +Typically this is run with a script calling Git's imitation of +the 'merge' command from the RCS package. + +A sample script called 'git merge-one-file' is included in the +distribution. + +ALERT ALERT ALERT! The Git "merge object order" is different from the +RCS 'merge' program merge object order. In the above ordering, the +original is first. But the argument order to the 3-way merge program +'merge' is to have the original in the middle. Don't ask me why. + +Examples: + + torvalds@ppc970:~/merge-test> git merge-index cat MM + This is MM from the original tree. # original + This is modified MM in the branch A. # merge1 + This is modified MM in the branch B. # merge2 + This is modified MM in the branch B. # current contents + +or + + torvalds@ppc970:~/merge-test> git merge-index cat AA MM + cat: : No such file or directory + This is added AA in the branch A. + This is added AA in the branch B. + This is added AA in the branch B. + fatal: merge program failed + +where the latter example shows how 'git merge-index' will stop trying to +merge once anything has returned an error (i.e., `cat` returned an error +for the AA file, because it didn't exist in the original, and thus +'git merge-index' didn't even try to merge the MM thing). + +GIT +--- +Part of the linkgit:git[1] suite diff --git a/Documentation/git-merge-one-file.txt b/Documentation/git-merge-one-file.txt new file mode 100644 index 0000000..04e803d --- /dev/null +++ b/Documentation/git-merge-one-file.txt @@ -0,0 +1,21 @@ +git-merge-one-file(1) +===================== + +NAME +---- +git-merge-one-file - The standard helper program to use with git-merge-index + + +SYNOPSIS +-------- +[verse] +'git merge-one-file' + +DESCRIPTION +----------- +This is the standard helper program to use with 'git merge-index' +to resolve a merge after the trivial merge done with 'git read-tree -m'. + +GIT +--- +Part of the linkgit:git[1] suite diff --git a/Documentation/git-merge-tree.txt b/Documentation/git-merge-tree.txt new file mode 100644 index 0000000..58731c1 --- /dev/null +++ b/Documentation/git-merge-tree.txt @@ -0,0 +1,29 @@ +git-merge-tree(1) +================= + +NAME +---- +git-merge-tree - Show three-way merge without touching index + + +SYNOPSIS +-------- +[verse] +'git merge-tree' <base-tree> <branch1> <branch2> + +DESCRIPTION +----------- +Reads three tree-ish, and output trivial merge results and +conflicting stages to the standard output. This is similar to +what three-way 'git read-tree -m' does, but instead of storing the +results in the index, the command outputs the entries to the +standard output. + +This is meant to be used by higher level scripts to compute +merge results outside of the index, and stuff the results back into the +index. For this reason, the output from the command omits +entries that match the <branch1> tree. + +GIT +--- +Part of the linkgit:git[1] suite diff --git a/Documentation/git-merge.txt b/Documentation/git-merge.txt new file mode 100644 index 0000000..07f7295 --- /dev/null +++ b/Documentation/git-merge.txt @@ -0,0 +1,354 @@ +git-merge(1) +============ + +NAME +---- +git-merge - Join two or more development histories together + + +SYNOPSIS +-------- +[verse] +'git merge' [-n] [--stat] [--no-commit] [--squash] [--[no-]edit] + [-s <strategy>] [-X <strategy-option>] [-S[<keyid>]] + [--[no-]rerere-autoupdate] [-m <msg>] [<commit>...] +'git merge' <msg> HEAD <commit>... +'git merge' --abort + +DESCRIPTION +----------- +Incorporates changes from the named commits (since the time their +histories diverged from the current branch) into the current +branch. This command is used by 'git pull' to incorporate changes +from another repository and can be used by hand to merge changes +from one branch into another. + +Assume the following history exists and the current branch is +"`master`": + +------------ + A---B---C topic + / + D---E---F---G master +------------ + +Then "`git merge topic`" will replay the changes made on the +`topic` branch since it diverged from `master` (i.e., `E`) until +its current commit (`C`) on top of `master`, and record the result +in a new commit along with the names of the two parent commits and +a log message from the user describing the changes. + +------------ + A---B---C topic + / \ + D---E---F---G---H master +------------ + +The second syntax (<msg> `HEAD` <commit>...) is supported for +historical reasons. Do not use it from the command line or in +new scripts. It is the same as `git merge -m <msg> <commit>...`. + +The third syntax ("`git merge --abort`") can only be run after the +merge has resulted in conflicts. 'git merge --abort' will abort the +merge process and try to reconstruct the pre-merge state. However, +if there were uncommitted changes when the merge started (and +especially if those changes were further modified after the merge +was started), 'git merge --abort' will in some cases be unable to +reconstruct the original (pre-merge) changes. Therefore: + +*Warning*: Running 'git merge' with non-trivial uncommitted changes is +discouraged: while possible, it may leave you in a state that is hard to +back out of in the case of a conflict. + + +OPTIONS +------- +include::merge-options.txt[] + +-S[<keyid>]:: +--gpg-sign[=<keyid>]:: + GPG-sign the resulting merge commit. The `keyid` argument is + optional and defaults to the committer identity; if specified, + it must be stuck to the option without a space. + +-m <msg>:: + Set the commit message to be used for the merge commit (in + case one is created). ++ +If `--log` is specified, a shortlog of the commits being merged +will be appended to the specified message. ++ +The 'git fmt-merge-msg' command can be +used to give a good default for automated 'git merge' +invocations. The automated message can include the branch description. + +--[no-]rerere-autoupdate:: + Allow the rerere mechanism to update the index with the + result of auto-conflict resolution if possible. + +--abort:: + Abort the current conflict resolution process, and + try to reconstruct the pre-merge state. ++ +If there were uncommitted worktree changes present when the merge +started, 'git merge --abort' will in some cases be unable to +reconstruct these changes. It is therefore recommended to always +commit or stash your changes before running 'git merge'. ++ +'git merge --abort' is equivalent to 'git reset --merge' when +`MERGE_HEAD` is present. + +<commit>...:: + Commits, usually other branch heads, to merge into our branch. + Specifying more than one commit will create a merge with + more than two parents (affectionately called an Octopus merge). ++ +If no commit is given from the command line, merge the remote-tracking +branches that the current branch is configured to use as its upstream. +See also the configuration section of this manual page. ++ +When `FETCH_HEAD` (and no other commit) is specified, the branches +recorded in the `.git/FETCH_HEAD` file by the previous invocation +of `git fetch` for merging are merged to the current branch. + + +PRE-MERGE CHECKS +---------------- + +Before applying outside changes, you should get your own work in +good shape and committed locally, so it will not be clobbered if +there are conflicts. See also linkgit:git-stash[1]. +'git pull' and 'git merge' will stop without doing anything when +local uncommitted changes overlap with files that 'git pull'/'git +merge' may need to update. + +To avoid recording unrelated changes in the merge commit, +'git pull' and 'git merge' will also abort if there are any changes +registered in the index relative to the `HEAD` commit. (One +exception is when the changed index entries are in the state that +would result from the merge already.) + +If all named commits are already ancestors of `HEAD`, 'git merge' +will exit early with the message "Already up-to-date." + +FAST-FORWARD MERGE +------------------ + +Often the current branch head is an ancestor of the named commit. +This is the most common case especially when invoked from 'git +pull': you are tracking an upstream repository, you have committed +no local changes, and now you want to update to a newer upstream +revision. In this case, a new commit is not needed to store the +combined history; instead, the `HEAD` (along with the index) is +updated to point at the named commit, without creating an extra +merge commit. + +This behavior can be suppressed with the `--no-ff` option. + +TRUE MERGE +---------- + +Except in a fast-forward merge (see above), the branches to be +merged must be tied together by a merge commit that has both of them +as its parents. + +A merged version reconciling the changes from all branches to be +merged is committed, and your `HEAD`, index, and working tree are +updated to it. It is possible to have modifications in the working +tree as long as they do not overlap; the update will preserve them. + +When it is not obvious how to reconcile the changes, the following +happens: + +1. The `HEAD` pointer stays the same. +2. The `MERGE_HEAD` ref is set to point to the other branch head. +3. Paths that merged cleanly are updated both in the index file and + in your working tree. +4. For conflicting paths, the index file records up to three + versions: stage 1 stores the version from the common ancestor, + stage 2 from `HEAD`, and stage 3 from `MERGE_HEAD` (you + can inspect the stages with `git ls-files -u`). The working + tree files contain the result of the "merge" program; i.e. 3-way + merge results with familiar conflict markers `<<<` `===` `>>>`. +5. No other changes are made. In particular, the local + modifications you had before you started merge will stay the + same and the index entries for them stay as they were, + i.e. matching `HEAD`. + +If you tried a merge which resulted in complex conflicts and +want to start over, you can recover with `git merge --abort`. + +MERGING TAG +----------- + +When merging an annotated (and possibly signed) tag, Git always +creates a merge commit even if a fast-forward merge is possible, and +the commit message template is prepared with the tag message. +Additionally, if the tag is signed, the signature check is reported +as a comment in the message template. See also linkgit:git-tag[1]. + +When you want to just integrate with the work leading to the commit +that happens to be tagged, e.g. synchronizing with an upstream +release point, you may not want to make an unnecessary merge commit. + +In such a case, you can "unwrap" the tag yourself before feeding it +to `git merge`, or pass `--ff-only` when you do not have any work on +your own. e.g. + +---- +git fetch origin +git merge v1.2.3^0 +git merge --ff-only v1.2.3 +---- + + +HOW CONFLICTS ARE PRESENTED +--------------------------- + +During a merge, the working tree files are updated to reflect the result +of the merge. Among the changes made to the common ancestor's version, +non-overlapping ones (that is, you changed an area of the file while the +other side left that area intact, or vice versa) are incorporated in the +final result verbatim. When both sides made changes to the same area, +however, Git cannot randomly pick one side over the other, and asks you to +resolve it by leaving what both sides did to that area. + +By default, Git uses the same style as the one used by the "merge" program +from the RCS suite to present such a conflicted hunk, like this: + +------------ +Here are lines that are either unchanged from the common +ancestor, or cleanly resolved because only one side changed. +<<<<<<< yours:sample.txt +Conflict resolution is hard; +let's go shopping. +======= +Git makes conflict resolution easy. +>>>>>>> theirs:sample.txt +And here is another line that is cleanly resolved or unmodified. +------------ + +The area where a pair of conflicting changes happened is marked with markers +`<<<<<<<`, `=======`, and `>>>>>>>`. The part before the `=======` +is typically your side, and the part afterwards is typically their side. + +The default format does not show what the original said in the conflicting +area. You cannot tell how many lines are deleted and replaced with +Barbie's remark on your side. The only thing you can tell is that your +side wants to say it is hard and you'd prefer to go shopping, while the +other side wants to claim it is easy. + +An alternative style can be used by setting the "merge.conflictStyle" +configuration variable to "diff3". In "diff3" style, the above conflict +may look like this: + +------------ +Here are lines that are either unchanged from the common +ancestor, or cleanly resolved because only one side changed. +<<<<<<< yours:sample.txt +Conflict resolution is hard; +let's go shopping. +||||||| +Conflict resolution is hard. +======= +Git makes conflict resolution easy. +>>>>>>> theirs:sample.txt +And here is another line that is cleanly resolved or unmodified. +------------ + +In addition to the `<<<<<<<`, `=======`, and `>>>>>>>` markers, it uses +another `|||||||` marker that is followed by the original text. You can +tell that the original just stated a fact, and your side simply gave in to +that statement and gave up, while the other side tried to have a more +positive attitude. You can sometimes come up with a better resolution by +viewing the original. + + +HOW TO RESOLVE CONFLICTS +------------------------ + +After seeing a conflict, you can do two things: + + * Decide not to merge. The only clean-ups you need are to reset + the index file to the `HEAD` commit to reverse 2. and to clean + up working tree changes made by 2. and 3.; `git merge --abort` + can be used for this. + + * Resolve the conflicts. Git will mark the conflicts in + the working tree. Edit the files into shape and + 'git add' them to the index. Use 'git commit' to seal the deal. + +You can work through the conflict with a number of tools: + + * Use a mergetool. `git mergetool` to launch a graphical + mergetool which will work you through the merge. + + * Look at the diffs. `git diff` will show a three-way diff, + highlighting changes from both the `HEAD` and `MERGE_HEAD` + versions. + + * Look at the diffs from each branch. `git log --merge -p <path>` + will show diffs first for the `HEAD` version and then the + `MERGE_HEAD` version. + + * Look at the originals. `git show :1:filename` shows the + common ancestor, `git show :2:filename` shows the `HEAD` + version, and `git show :3:filename` shows the `MERGE_HEAD` + version. + + +EXAMPLES +-------- + +* Merge branches `fixes` and `enhancements` on top of + the current branch, making an octopus merge: ++ +------------------------------------------------ +$ git merge fixes enhancements +------------------------------------------------ + +* Merge branch `obsolete` into the current branch, using `ours` + merge strategy: ++ +------------------------------------------------ +$ git merge -s ours obsolete +------------------------------------------------ + +* Merge branch `maint` into the current branch, but do not make + a new commit automatically: ++ +------------------------------------------------ +$ git merge --no-commit maint +------------------------------------------------ ++ +This can be used when you want to include further changes to the +merge, or want to write your own merge commit message. ++ +You should refrain from abusing this option to sneak substantial +changes into a merge commit. Small fixups like bumping +release/version name would be acceptable. + + +include::merge-strategies.txt[] + +CONFIGURATION +------------- +include::merge-config.txt[] + +branch.<name>.mergeOptions:: + Sets default options for merging into branch <name>. The syntax and + supported options are the same as those of 'git merge', but option + values containing whitespace characters are currently not supported. + +SEE ALSO +-------- +linkgit:git-fmt-merge-msg[1], linkgit:git-pull[1], +linkgit:gitattributes[5], +linkgit:git-reset[1], +linkgit:git-diff[1], linkgit:git-ls-files[1], +linkgit:git-add[1], linkgit:git-rm[1], +linkgit:git-mergetool[1] + +GIT +--- +Part of the linkgit:git[1] suite diff --git a/Documentation/git-mergetool--lib.txt b/Documentation/git-mergetool--lib.txt new file mode 100644 index 0000000..055550b --- /dev/null +++ b/Documentation/git-mergetool--lib.txt @@ -0,0 +1,47 @@ +git-mergetool{litdd}lib(1) +========================== + +NAME +---- +git-mergetool--lib - Common Git merge tool shell scriptlets + +SYNOPSIS +-------- +[verse] +'TOOL_MODE=(diff|merge) . "$(git --exec-path)/git-mergetool{litdd}lib"' + +DESCRIPTION +----------- + +This is not a command the end user would want to run. Ever. +This documentation is meant for people who are studying the +Porcelain-ish scripts and/or are writing new ones. + +The 'git-mergetool{litdd}lib' scriptlet is designed to be sourced (using +`.`) by other shell scripts to set up functions for working +with Git merge tools. + +Before sourcing 'git-mergetool{litdd}lib', your script must set `TOOL_MODE` +to define the operation mode for the functions listed below. +'diff' and 'merge' are valid values. + +FUNCTIONS +--------- +get_merge_tool:: + returns a merge tool. + +get_merge_tool_cmd:: + returns the custom command for a merge tool. + +get_merge_tool_path:: + returns the custom path for a merge tool. + +run_merge_tool:: + launches a merge tool given the tool name and a true/false + flag to indicate whether a merge base is present. + '$MERGED', '$LOCAL', '$REMOTE', and '$BASE' must be defined + for use by the merge tool. + +GIT +--- +Part of the linkgit:git[1] suite diff --git a/Documentation/git-mergetool.txt b/Documentation/git-mergetool.txt new file mode 100644 index 0000000..e846c2e --- /dev/null +++ b/Documentation/git-mergetool.txt @@ -0,0 +1,94 @@ +git-mergetool(1) +================ + +NAME +---- +git-mergetool - Run merge conflict resolution tools to resolve merge conflicts + +SYNOPSIS +-------- +[verse] +'git mergetool' [--tool=<tool>] [-y | --[no-]prompt] [<file>...] + +DESCRIPTION +----------- + +Use `git mergetool` to run one of several merge utilities to resolve +merge conflicts. It is typically run after 'git merge'. + +If one or more <file> parameters are given, the merge tool program will +be run to resolve differences on each file (skipping those without +conflicts). Specifying a directory will include all unresolved files in +that path. If no <file> names are specified, 'git mergetool' will run +the merge tool program on every file with merge conflicts. + +OPTIONS +------- +-t <tool>:: +--tool=<tool>:: + Use the merge resolution program specified by <tool>. + Valid values include emerge, gvimdiff, kdiff3, + meld, vimdiff, and tortoisemerge. Run `git mergetool --tool-help` + for the list of valid <tool> settings. ++ +If a merge resolution program is not specified, 'git mergetool' +will use the configuration variable `merge.tool`. If the +configuration variable `merge.tool` is not set, 'git mergetool' +will pick a suitable default. ++ +You can explicitly provide a full path to the tool by setting the +configuration variable `mergetool.<tool>.path`. For example, you +can configure the absolute path to kdiff3 by setting +`mergetool.kdiff3.path`. Otherwise, 'git mergetool' assumes the +tool is available in PATH. ++ +Instead of running one of the known merge tool programs, +'git mergetool' can be customized to run an alternative program +by specifying the command line to invoke in a configuration +variable `mergetool.<tool>.cmd`. ++ +When 'git mergetool' is invoked with this tool (either through the +`-t` or `--tool` option or the `merge.tool` configuration +variable) the configured command line will be invoked with `$BASE` +set to the name of a temporary file containing the common base for +the merge, if available; `$LOCAL` set to the name of a temporary +file containing the contents of the file on the current branch; +`$REMOTE` set to the name of a temporary file containing the +contents of the file to be merged, and `$MERGED` set to the name +of the file to which the merge tool should write the result of the +merge resolution. ++ +If the custom merge tool correctly indicates the success of a +merge resolution with its exit code, then the configuration +variable `mergetool.<tool>.trustExitCode` can be set to `true`. +Otherwise, 'git mergetool' will prompt the user to indicate the +success of the resolution after the custom tool has exited. + +--tool-help:: + Print a list of merge tools that may be used with `--tool`. + +-y:: +--no-prompt:: + Don't prompt before each invocation of the merge resolution + program. + This is the default if the merge resolution program is + explicitly specified with the `--tool` option or with the + `merge.tool` configuration variable. + +--prompt:: + Prompt before each invocation of the merge resolution program + to give the user a chance to skip the path. + +TEMPORARY FILES +--------------- +`git mergetool` creates `*.orig` backup files while resolving merges. +These are safe to remove once a file has been merged and its +`git mergetool` session has completed. + +Setting the `mergetool.keepBackup` configuration variable to `false` +causes `git mergetool` to automatically remove the backup as files +are successfully merged. + +GIT +--- +Part of the linkgit:git[1] suite diff --git a/Documentation/git-mktag.txt b/Documentation/git-mktag.txt new file mode 100644 index 0000000..fa6a756 --- /dev/null +++ b/Documentation/git-mktag.txt @@ -0,0 +1,39 @@ +git-mktag(1) +============ + +NAME +---- +git-mktag - Creates a tag object + + +SYNOPSIS +-------- +[verse] +'git mktag' + +DESCRIPTION +----------- +Reads a tag contents on standard input and creates a tag object +that can also be used to sign other objects. + +The output is the new tag's <object> identifier. + +Tag Format +---------- +A tag signature file, to be fed to this command's standard input, +has a very simple fixed format: four lines of + + object <sha1> + type <typename> + tag <tagname> + tagger <tagger> + +followed by some 'optional' free-form message (some tags created +by older Git may not have `tagger` line). The message, when +exists, is separated by a blank line from the header. The +message part may contain a signature that Git itself doesn't +care about, but that can be verified with gpg. + +GIT +--- +Part of the linkgit:git[1] suite diff --git a/Documentation/git-mktree.txt b/Documentation/git-mktree.txt new file mode 100644 index 0000000..5c6ebdf --- /dev/null +++ b/Documentation/git-mktree.txt @@ -0,0 +1,40 @@ +git-mktree(1) +============= + +NAME +---- +git-mktree - Build a tree-object from ls-tree formatted text + + +SYNOPSIS +-------- +[verse] +'git mktree' [-z] [--missing] [--batch] + +DESCRIPTION +----------- +Reads standard input in non-recursive `ls-tree` output format, and creates +a tree object. The order of the tree entries is normalised by mktree so +pre-sorting the input is not required. The object name of the tree object +built is written to the standard output. + +OPTIONS +------- +-z:: + Read the NUL-terminated `ls-tree -z` output instead. + +--missing:: + Allow missing objects. The default behaviour (without this option) + is to verify that each tree entry's sha1 identifies an existing + object. This option has no effect on the treatment of gitlink entries + (aka "submodules") which are always allowed to be missing. + +--batch:: + Allow building of more than one tree object before exiting. Each + tree is separated by as single blank line. The final new-line is + optional. Note - if the '-z' option is used, lines are terminated + with NUL. + +GIT +--- +Part of the linkgit:git[1] suite diff --git a/Documentation/git-mv.txt b/Documentation/git-mv.txt new file mode 100644 index 0000000..e453132 --- /dev/null +++ b/Documentation/git-mv.txt @@ -0,0 +1,69 @@ +git-mv(1) +========= + +NAME +---- +git-mv - Move or rename a file, a directory, or a symlink + + +SYNOPSIS +-------- +[verse] +'git mv' <options>... <args>... + +DESCRIPTION +----------- +Move or rename a file, directory or symlink. + + git mv [-v] [-f] [-n] [-k] <source> <destination> + git mv [-v] [-f] [-n] [-k] <source> ... <destination directory> + +In the first form, it renames <source>, which must exist and be either +a file, symlink or directory, to <destination>. +In the second form, the last argument has to be an existing +directory; the given sources will be moved into this directory. + +The index is updated after successful completion, but the change must still be +committed. + +OPTIONS +------- +-f:: +--force:: + Force renaming or moving of a file even if the target exists +-k:: + Skip move or rename actions which would lead to an error + condition. An error happens when a source is neither existing nor + controlled by Git, or when it would overwrite an existing + file unless '-f' is given. +-n:: +--dry-run:: + Do nothing; only show what would happen + +-v:: +--verbose:: + Report the names of files as they are moved. + +SUBMODULES +---------- +Moving a submodule using a gitfile (which means they were cloned +with a Git version 1.7.8 or newer) will update the gitfile and +core.worktree setting to make the submodule work in the new location. +It also will attempt to update the submodule.<name>.path setting in +the linkgit:gitmodules[5] file and stage that file (unless -n is used). + +BUGS +---- +Each time a superproject update moves a populated submodule (e.g. when +switching between commits before and after the move) a stale submodule +checkout will remain in the old location and an empty directory will +appear in the new location. To populate the submodule again in the new +location the user will have to run "git submodule update" +afterwards. Removing the old directory is only safe when it uses a +gitfile, as otherwise the history of the submodule will be deleted +too. Both steps will be obsolete when recursive submodule update has +been implemented. + +GIT +--- +Part of the linkgit:git[1] suite diff --git a/Documentation/git-name-rev.txt b/Documentation/git-name-rev.txt new file mode 100644 index 0000000..ca28fb8 --- /dev/null +++ b/Documentation/git-name-rev.txt @@ -0,0 +1,78 @@ +git-name-rev(1) +=============== + +NAME +---- +git-name-rev - Find symbolic names for given revs + + +SYNOPSIS +-------- +[verse] +'git name-rev' [--tags] [--refs=<pattern>] + ( --all | --stdin | <commit-ish>... ) + +DESCRIPTION +----------- +Finds symbolic names suitable for human digestion for revisions given in any +format parsable by 'git rev-parse'. + + +OPTIONS +------- + +--tags:: + Do not use branch names, but only tags to name the commits + +--refs=<pattern>:: + Only use refs whose names match a given shell pattern. The pattern + can be one of branch name, tag name or fully qualified ref name. + +--all:: + List all commits reachable from all refs + +--stdin:: + Transform stdin by substituting all the 40-character SHA-1 + hexes (say $hex) with "$hex ($rev_name)". When used with + --name-only, substitute with "$rev_name", omitting $hex + altogether. Intended for the scripter's use. + +--name-only:: + Instead of printing both the SHA-1 and the name, print only + the name. If given with --tags the usual tag prefix of + "tags/" is also omitted from the name, matching the output + of `git-describe` more closely. + +--no-undefined:: + Die with error code != 0 when a reference is undefined, + instead of printing `undefined`. + +--always:: + Show uniquely abbreviated commit object as fallback. + +EXAMPLE +------- + +Given a commit, find out where it is relative to the local refs. Say somebody +wrote you about that fantastic commit 33db5f4d9027a10e477ccf054b2c1ab94f74c85a. +Of course, you look into the commit, but that only tells you what happened, but +not the context. + +Enter 'git name-rev': + +------------ +% git name-rev 33db5f4d9027a10e477ccf054b2c1ab94f74c85a +33db5f4d9027a10e477ccf054b2c1ab94f74c85a tags/v0.99~940 +------------ + +Now you are wiser, because you know that it happened 940 revisions before v0.99. + +Another nice thing you can do is: + +------------ +% git log | git name-rev --stdin +------------ + +GIT +--- +Part of the linkgit:git[1] suite diff --git a/Documentation/git-notes.txt b/Documentation/git-notes.txt new file mode 100644 index 0000000..9c4fd68 --- /dev/null +++ b/Documentation/git-notes.txt @@ -0,0 +1,405 @@ +git-notes(1) +============ + +NAME +---- +git-notes - Add or inspect object notes + +SYNOPSIS +-------- +[verse] +'git notes' [list [<object>]] +'git notes' add [-f] [--allow-empty] [-F <file> | -m <msg> | (-c | -C) <object>] [<object>] +'git notes' copy [-f] ( --stdin | <from-object> <to-object> ) +'git notes' append [--allow-empty] [-F <file> | -m <msg> | (-c | -C) <object>] [<object>] +'git notes' edit [--allow-empty] [<object>] +'git notes' show [<object>] +'git notes' merge [-v | -q] [-s <strategy> ] <notes-ref> +'git notes' merge --commit [-v | -q] +'git notes' merge --abort [-v | -q] +'git notes' remove [--ignore-missing] [--stdin] [<object>...] +'git notes' prune [-n | -v] +'git notes' get-ref + + +DESCRIPTION +----------- +Adds, removes, or reads notes attached to objects, without touching +the objects themselves. + +By default, notes are saved to and read from `refs/notes/commits`, but +this default can be overridden. See the OPTIONS, CONFIGURATION, and +ENVIRONMENT sections below. If this ref does not exist, it will be +quietly created when it is first needed to store a note. + +A typical use of notes is to supplement a commit message without +changing the commit itself. Notes can be shown by 'git log' along with +the original commit message. To distinguish these notes from the +message stored in the commit object, the notes are indented like the +message, after an unindented line saying "Notes (<refname>):" (or +"Notes:" for `refs/notes/commits`). + +Notes can also be added to patches prepared with `git format-patch` by +using the `--notes` option. Such notes are added as a patch commentary +after a three dash separator line. + +To change which notes are shown by 'git log', see the +"notes.displayRef" configuration in linkgit:git-log[1]. + +See the "notes.rewrite.<command>" configuration for a way to carry +notes across commands that rewrite commits. + + +SUBCOMMANDS +----------- + +list:: + List the notes object for a given object. If no object is + given, show a list of all note objects and the objects they + annotate (in the format "<note object> <annotated object>"). + This is the default subcommand if no subcommand is given. + +add:: + Add notes for a given object (defaults to HEAD). Abort if the + object already has notes (use `-f` to overwrite existing notes). + However, if you're using `add` interactively (using an editor + to supply the notes contents), then - instead of aborting - + the existing notes will be opened in the editor (like the `edit` + subcommand). + +copy:: + Copy the notes for the first object onto the second object. + Abort if the second object already has notes, or if the first + object has none (use -f to overwrite existing notes to the + second object). This subcommand is equivalent to: + `git notes add [-f] -C $(git notes list <from-object>) <to-object>` ++ +In `--stdin` mode, take lines in the format ++ +---------- +<from-object> SP <to-object> [ SP <rest> ] LF +---------- ++ +on standard input, and copy the notes from each <from-object> to its +corresponding <to-object>. (The optional `<rest>` is ignored so that +the command can read the input given to the `post-rewrite` hook.) + +append:: + Append to the notes of an existing object (defaults to HEAD). + Creates a new notes object if needed. + +edit:: + Edit the notes for a given object (defaults to HEAD). + +show:: + Show the notes for a given object (defaults to HEAD). + +merge:: + Merge the given notes ref into the current notes ref. + This will try to merge the changes made by the given + notes ref (called "remote") since the merge-base (if + any) into the current notes ref (called "local"). ++ +If conflicts arise and a strategy for automatically resolving +conflicting notes (see the "NOTES MERGE STRATEGIES" section) is not given, +the "manual" resolver is used. This resolver checks out the +conflicting notes in a special worktree (`.git/NOTES_MERGE_WORKTREE`), +and instructs the user to manually resolve the conflicts there. +When done, the user can either finalize the merge with +'git notes merge --commit', or abort the merge with +'git notes merge --abort'. + +remove:: + Remove the notes for given objects (defaults to HEAD). When + giving zero or one object from the command line, this is + equivalent to specifying an empty note message to + the `edit` subcommand. + +prune:: + Remove all notes for non-existing/unreachable objects. + +get-ref:: + Print the current notes ref. This provides an easy way to + retrieve the current notes ref (e.g. from scripts). + +OPTIONS +------- +-f:: +--force:: + When adding notes to an object that already has notes, + overwrite the existing notes (instead of aborting). + +-m <msg>:: +--message=<msg>:: + Use the given note message (instead of prompting). + If multiple `-m` options are given, their values + are concatenated as separate paragraphs. + Lines starting with `#` and empty lines other than a + single line between paragraphs will be stripped out. + +-F <file>:: +--file=<file>:: + Take the note message from the given file. Use '-' to + read the note message from the standard input. + Lines starting with `#` and empty lines other than a + single line between paragraphs will be stripped out. + +-C <object>:: +--reuse-message=<object>:: + Take the given blob object (for example, another note) as the + note message. (Use `git notes copy <object>` instead to + copy notes between objects.) + +-c <object>:: +--reedit-message=<object>:: + Like '-C', but with '-c' the editor is invoked, so that + the user can further edit the note message. + +--allow-empty:: + Allow an empty note object to be stored. The default behavior is + to automatically remove empty notes. + +--ref <ref>:: + Manipulate the notes tree in <ref>. This overrides + 'GIT_NOTES_REF' and the "core.notesRef" configuration. The ref + specifies the full refname when it begins with `refs/notes/`; when it + begins with `notes/`, `refs/` and otherwise `refs/notes/` is prefixed + to form a full name of the ref. + +--ignore-missing:: + Do not consider it an error to request removing notes from an + object that does not have notes attached to it. + +--stdin:: + Also read the object names to remove notes from from the standard + input (there is no reason you cannot combine this with object + names from the command line). + +-n:: +--dry-run:: + Do not remove anything; just report the object names whose notes + would be removed. + +-s <strategy>:: +--strategy=<strategy>:: + When merging notes, resolve notes conflicts using the given + strategy. The following strategies are recognized: "manual" + (default), "ours", "theirs", "union" and "cat_sort_uniq". + This option overrides the "notes.mergeStrategy" configuration setting. + See the "NOTES MERGE STRATEGIES" section below for more + information on each notes merge strategy. + +--commit:: + Finalize an in-progress 'git notes merge'. Use this option + when you have resolved the conflicts that 'git notes merge' + stored in .git/NOTES_MERGE_WORKTREE. This amends the partial + merge commit created by 'git notes merge' (stored in + .git/NOTES_MERGE_PARTIAL) by adding the notes in + .git/NOTES_MERGE_WORKTREE. The notes ref stored in the + .git/NOTES_MERGE_REF symref is updated to the resulting commit. + +--abort:: + Abort/reset a in-progress 'git notes merge', i.e. a notes merge + with conflicts. This simply removes all files related to the + notes merge. + +-q:: +--quiet:: + When merging notes, operate quietly. + +-v:: +--verbose:: + When merging notes, be more verbose. + When pruning notes, report all object names whose notes are + removed. + + +DISCUSSION +---------- + +Commit notes are blobs containing extra information about an object +(usually information to supplement a commit's message). These blobs +are taken from notes refs. A notes ref is usually a branch which +contains "files" whose paths are the object names for the objects +they describe, with some directory separators included for performance +reasons footnote:[Permitted pathnames have the form +'ab'`/`'cd'`/`'ef'`/`'...'`/`'abcdef...': a sequence of directory +names of two hexadecimal digits each followed by a filename with the +rest of the object ID.]. + +Every notes change creates a new commit at the specified notes ref. +You can therefore inspect the history of the notes by invoking, e.g., +`git log -p notes/commits`. Currently the commit message only records +which operation triggered the update, and the commit authorship is +determined according to the usual rules (see linkgit:git-commit[1]). +These details may change in the future. + +It is also permitted for a notes ref to point directly to a tree +object, in which case the history of the notes can be read with +`git log -p -g <refname>`. + + +NOTES MERGE STRATEGIES +---------------------- + +The default notes merge strategy is "manual", which checks out +conflicting notes in a special work tree for resolving notes conflicts +(`.git/NOTES_MERGE_WORKTREE`), and instructs the user to resolve the +conflicts in that work tree. +When done, the user can either finalize the merge with +'git notes merge --commit', or abort the merge with +'git notes merge --abort'. + +Users may select an automated merge strategy from among the following using +either -s/--strategy option or configuring notes.mergeStrategy accordingly: + +"ours" automatically resolves conflicting notes in favor of the local +version (i.e. the current notes ref). + +"theirs" automatically resolves notes conflicts in favor of the remote +version (i.e. the given notes ref being merged into the current notes +ref). + +"union" automatically resolves notes conflicts by concatenating the +local and remote versions. + +"cat_sort_uniq" is similar to "union", but in addition to concatenating +the local and remote versions, this strategy also sorts the resulting +lines, and removes duplicate lines from the result. This is equivalent +to applying the "cat | sort | uniq" shell pipeline to the local and +remote versions. This strategy is useful if the notes follow a line-based +format where one wants to avoid duplicated lines in the merge result. +Note that if either the local or remote version contain duplicate lines +prior to the merge, these will also be removed by this notes merge +strategy. + + +EXAMPLES +-------- + +You can use notes to add annotations with information that was not +available at the time a commit was written. + +------------ +$ git notes add -m 'Tested-by: Johannes Sixt <j6t@kdbg.org>' 72a144e2 +$ git show -s 72a144e +[...] + Signed-off-by: Junio C Hamano <gitster@pobox.com> + +Notes: + Tested-by: Johannes Sixt <j6t@kdbg.org> +------------ + +In principle, a note is a regular Git blob, and any kind of +(non-)format is accepted. You can binary-safely create notes from +arbitrary files using 'git hash-object': + +------------ +$ cc *.c +$ blob=$(git hash-object -w a.out) +$ git notes --ref=built add --allow-empty -C "$blob" HEAD +------------ + +(You cannot simply use `git notes --ref=built add -F a.out HEAD` +because that is not binary-safe.) +Of course, it doesn't make much sense to display non-text-format notes +with 'git log', so if you use such notes, you'll probably need to write +some special-purpose tools to do something useful with them. + + +CONFIGURATION +------------- + +core.notesRef:: + Notes ref to read and manipulate instead of + `refs/notes/commits`. Must be an unabbreviated ref name. + This setting can be overridden through the environment and + command line. + +notes.mergeStrategy:: + Which merge strategy to choose by default when resolving notes + conflicts. Must be one of `manual`, `ours`, `theirs`, `union`, or + `cat_sort_uniq`. Defaults to `manual`. See "NOTES MERGE STRATEGIES" + section above for more information on each strategy. ++ +This setting can be overridden by passing the `--strategy` option. + +notes.<name>.mergeStrategy:: + Which merge strategy to choose when doing a notes merge into + refs/notes/<name>. This overrides the more general + "notes.mergeStrategy". See the "NOTES MERGE STRATEGIES" section above + for more information on each available strategy. + +notes.displayRef:: + Which ref (or refs, if a glob or specified more than once), in + addition to the default set by `core.notesRef` or + 'GIT_NOTES_REF', to read notes from when showing commit + messages with the 'git log' family of commands. + This setting can be overridden on the command line or by the + 'GIT_NOTES_DISPLAY_REF' environment variable. + See linkgit:git-log[1]. + +notes.rewrite.<command>:: + When rewriting commits with <command> (currently `amend` or + `rebase`), if this variable is `false`, git will not copy + notes from the original to the rewritten commit. Defaults to + `true`. See also "`notes.rewriteRef`" below. ++ +This setting can be overridden by the 'GIT_NOTES_REWRITE_REF' +environment variable. + +notes.rewriteMode:: + When copying notes during a rewrite, what to do if the target + commit already has a note. Must be one of `overwrite`, + `concatenate`, `cat_sort_uniq`, or `ignore`. Defaults to + `concatenate`. ++ +This setting can be overridden with the `GIT_NOTES_REWRITE_MODE` +environment variable. + +notes.rewriteRef:: + When copying notes during a rewrite, specifies the (fully + qualified) ref whose notes should be copied. May be a glob, + in which case notes in all matching refs will be copied. You + may also specify this configuration several times. ++ +Does not have a default value; you must configure this variable to +enable note rewriting. ++ +Can be overridden with the 'GIT_NOTES_REWRITE_REF' environment variable. + + +ENVIRONMENT +----------- + +'GIT_NOTES_REF':: + Which ref to manipulate notes from, instead of `refs/notes/commits`. + This overrides the `core.notesRef` setting. + +'GIT_NOTES_DISPLAY_REF':: + Colon-delimited list of refs or globs indicating which refs, + in addition to the default from `core.notesRef` or + 'GIT_NOTES_REF', to read notes from when showing commit + messages. + This overrides the `notes.displayRef` setting. ++ +A warning will be issued for refs that do not exist, but a glob that +does not match any refs is silently ignored. + +'GIT_NOTES_REWRITE_MODE':: + When copying notes during a rewrite, what to do if the target + commit already has a note. + Must be one of `overwrite`, `concatenate`, `cat_sort_uniq`, or `ignore`. + This overrides the `core.rewriteMode` setting. + +'GIT_NOTES_REWRITE_REF':: + When rewriting commits, which notes to copy from the original + to the rewritten commit. Must be a colon-delimited list of + refs or globs. ++ +If not set in the environment, the list of notes to copy depends +on the `notes.rewrite.<command>` and `notes.rewriteRef` settings. + +GIT +--- +Part of the linkgit:git[1] suite diff --git a/Documentation/git-p4.txt b/Documentation/git-p4.txt new file mode 100644 index 0000000..35e3170 --- /dev/null +++ b/Documentation/git-p4.txt @@ -0,0 +1,626 @@ +git-p4(1) +========= + +NAME +---- +git-p4 - Import from and submit to Perforce repositories + + +SYNOPSIS +-------- +[verse] +'git p4 clone' [<sync options>] [<clone options>] <p4 depot path>... +'git p4 sync' [<sync options>] [<p4 depot path>...] +'git p4 rebase' +'git p4 submit' [<submit options>] [<master branch name>] + + +DESCRIPTION +----------- +This command provides a way to interact with p4 repositories +using Git. + +Create a new Git repository from an existing p4 repository using +'git p4 clone', giving it one or more p4 depot paths. Incorporate +new commits from p4 changes with 'git p4 sync'. The 'sync' command +is also used to include new branches from other p4 depot paths. +Submit Git changes back to p4 using 'git p4 submit'. The command +'git p4 rebase' does a sync plus rebases the current branch onto +the updated p4 remote branch. + + +EXAMPLE +------- +* Clone a repository: ++ +------------ +$ git p4 clone //depot/path/project +------------ + +* Do some work in the newly created Git repository: ++ +------------ +$ cd project +$ vi foo.h +$ git commit -a -m "edited foo.h" +------------ + +* Update the Git repository with recent changes from p4, rebasing your + work on top: ++ +------------ +$ git p4 rebase +------------ + +* Submit your commits back to p4: ++ +------------ +$ git p4 submit +------------ + + +COMMANDS +-------- + +Clone +~~~~~ +Generally, 'git p4 clone' is used to create a new Git directory +from an existing p4 repository: +------------ +$ git p4 clone //depot/path/project +------------ +This: + +1. Creates an empty Git repository in a subdirectory called 'project'. ++ +2. Imports the full contents of the head revision from the given p4 +depot path into a single commit in the Git branch 'refs/remotes/p4/master'. ++ +3. Creates a local branch, 'master' from this remote and checks it out. + +To reproduce the entire p4 history in Git, use the '@all' modifier on +the depot path: +------------ +$ git p4 clone //depot/path/project@all +------------ + + +Sync +~~~~ +As development continues in the p4 repository, those changes can +be included in the Git repository using: +------------ +$ git p4 sync +------------ +This command finds new changes in p4 and imports them as Git commits. + +P4 repositories can be added to an existing Git repository using +'git p4 sync' too: +------------ +$ mkdir repo-git +$ cd repo-git +$ git init +$ git p4 sync //path/in/your/perforce/depot +------------ +This imports the specified depot into +'refs/remotes/p4/master' in an existing Git repository. The +'--branch' option can be used to specify a different branch to +be used for the p4 content. + +If a Git repository includes branches 'refs/remotes/origin/p4', these +will be fetched and consulted first during a 'git p4 sync'. Since +importing directly from p4 is considerably slower than pulling changes +from a Git remote, this can be useful in a multi-developer environment. + +If there are multiple branches, doing 'git p4 sync' will automatically +use the "BRANCH DETECTION" algorithm to try to partition new changes +into the right branch. This can be overridden with the '--branch' +option to specify just a single branch to update. + + +Rebase +~~~~~~ +A common working pattern is to fetch the latest changes from the p4 depot +and merge them with local uncommitted changes. Often, the p4 repository +is the ultimate location for all code, thus a rebase workflow makes +sense. This command does 'git p4 sync' followed by 'git rebase' to move +local commits on top of updated p4 changes. +------------ +$ git p4 rebase +------------ + + +Submit +~~~~~~ +Submitting changes from a Git repository back to the p4 repository +requires a separate p4 client workspace. This should be specified +using the 'P4CLIENT' environment variable or the Git configuration +variable 'git-p4.client'. The p4 client must exist, but the client root +will be created and populated if it does not already exist. + +To submit all changes that are in the current Git branch but not in +the 'p4/master' branch, use: +------------ +$ git p4 submit +------------ + +To specify a branch other than the current one, use: +------------ +$ git p4 submit topicbranch +------------ + +The upstream reference is generally 'refs/remotes/p4/master', but can +be overridden using the '--origin=' command-line option. + +The p4 changes will be created as the user invoking 'git p4 submit'. The +'--preserve-user' option will cause ownership to be modified +according to the author of the Git commit. This option requires admin +privileges in p4, which can be granted using 'p4 protect'. + + +OPTIONS +------- + +General options +~~~~~~~~~~~~~~~ +All commands except clone accept these options. + +--git-dir <dir>:: + Set the 'GIT_DIR' environment variable. See linkgit:git[1]. + +-v:: +--verbose:: + Provide more progress information. + +Sync options +~~~~~~~~~~~~ +These options can be used in the initial 'clone' as well as in +subsequent 'sync' operations. + +--branch <ref>:: + Import changes into <ref> instead of refs/remotes/p4/master. + If <ref> starts with refs/, it is used as is. Otherwise, if + it does not start with p4/, that prefix is added. ++ +By default a <ref> not starting with refs/ is treated as the +name of a remote-tracking branch (under refs/remotes/). This +behavior can be modified using the --import-local option. ++ +The default <ref> is "master". ++ +This example imports a new remote "p4/proj2" into an existing +Git repository: ++ +---- + $ git init + $ git p4 sync --branch=refs/remotes/p4/proj2 //depot/proj2 +---- + +--detect-branches:: + Use the branch detection algorithm to find new paths in p4. It is + documented below in "BRANCH DETECTION". + +--changesfile <file>:: + Import exactly the p4 change numbers listed in 'file', one per + line. Normally, 'git p4' inspects the current p4 repository + state and detects the changes it should import. + +--silent:: + Do not print any progress information. + +--detect-labels:: + Query p4 for labels associated with the depot paths, and add + them as tags in Git. Limited usefulness as only imports labels + associated with new changelists. Deprecated. + +--import-labels:: + Import labels from p4 into Git. + +--import-local:: + By default, p4 branches are stored in 'refs/remotes/p4/', + where they will be treated as remote-tracking branches by + linkgit:git-branch[1] and other commands. This option instead + puts p4 branches in 'refs/heads/p4/'. Note that future + sync operations must specify '--import-local' as well so that + they can find the p4 branches in refs/heads. + +--max-changes <n>:: + Import at most 'n' changes, rather than the entire range of + changes included in the given revision specifier. A typical + usage would be use '@all' as the revision specifier, but then + to use '--max-changes 1000' to import only the last 1000 + revisions rather than the entire revision history. + +--changes-block-size <n>:: + The internal block size to use when converting a revision + specifier such as '@all' into a list of specific change + numbers. Instead of using a single call to 'p4 changes' to + find the full list of changes for the conversion, there are a + sequence of calls to 'p4 changes -m', each of which requests + one block of changes of the given size. The default block size + is 500, which should usually be suitable. + +--keep-path:: + The mapping of file names from the p4 depot path to Git, by + default, involves removing the entire depot path. With this + option, the full p4 depot path is retained in Git. For example, + path '//depot/main/foo/bar.c', when imported from + '//depot/main/', becomes 'foo/bar.c'. With '--keep-path', the + Git path is instead 'depot/main/foo/bar.c'. + +--use-client-spec:: + Use a client spec to find the list of interesting files in p4. + See the "CLIENT SPEC" section below. + +-/ <path>:: + Exclude selected depot paths when cloning or syncing. + +Clone options +~~~~~~~~~~~~~ +These options can be used in an initial 'clone', along with the 'sync' +options described above. + +--destination <directory>:: + Where to create the Git repository. If not provided, the last + component in the p4 depot path is used to create a new + directory. + +--bare:: + Perform a bare clone. See linkgit:git-clone[1]. + +Submit options +~~~~~~~~~~~~~~ +These options can be used to modify 'git p4 submit' behavior. + +--origin <commit>:: + Upstream location from which commits are identified to submit to + p4. By default, this is the most recent p4 commit reachable + from 'HEAD'. + +-M:: + Detect renames. See linkgit:git-diff[1]. Renames will be + represented in p4 using explicit 'move' operations. There + is no corresponding option to detect copies, but there are + variables for both moves and copies. + +--preserve-user:: + Re-author p4 changes before submitting to p4. This option + requires p4 admin privileges. + +--export-labels:: + Export tags from Git as p4 labels. Tags found in Git are applied + to the perforce working directory. + +-n:: +--dry-run:: + Show just what commits would be submitted to p4; do not change + state in Git or p4. + +--prepare-p4-only:: + Apply a commit to the p4 workspace, opening, adding and deleting + files in p4 as for a normal submit operation. Do not issue the + final "p4 submit", but instead print a message about how to + submit manually or revert. This option always stops after the + first (oldest) commit. Git tags are not exported to p4. + +--conflict=(ask|skip|quit):: + Conflicts can occur when applying a commit to p4. When this + happens, the default behavior ("ask") is to prompt whether to + skip this commit and continue, or quit. This option can be used + to bypass the prompt, causing conflicting commits to be automatically + skipped, or to quit trying to apply commits, without prompting. + +--branch <branch>:: + After submitting, sync this named branch instead of the default + p4/master. See the "Sync options" section above for more + information. + +Rebase options +~~~~~~~~~~~~~~ +These options can be used to modify 'git p4 rebase' behavior. + +--import-labels:: + Import p4 labels. + +DEPOT PATH SYNTAX +----------------- +The p4 depot path argument to 'git p4 sync' and 'git p4 clone' can +be one or more space-separated p4 depot paths, with an optional +p4 revision specifier on the end: + +"//depot/my/project":: + Import one commit with all files in the '#head' change under that tree. + +"//depot/my/project@all":: + Import one commit for each change in the history of that depot path. + +"//depot/my/project@1,6":: + Import only changes 1 through 6. + +"//depot/proj1@all //depot/proj2@all":: + Import all changes from both named depot paths into a single + repository. Only files below these directories are included. + There is not a subdirectory in Git for each "proj1" and "proj2". + You must use the '--destination' option when specifying more + than one depot path. The revision specifier must be specified + identically on each depot path. If there are files in the + depot paths with the same name, the path with the most recently + updated version of the file is the one that appears in Git. + +See 'p4 help revisions' for the full syntax of p4 revision specifiers. + + +CLIENT SPEC +----------- +The p4 client specification is maintained with the 'p4 client' command +and contains among other fields, a View that specifies how the depot +is mapped into the client repository. The 'clone' and 'sync' commands +can consult the client spec when given the '--use-client-spec' option or +when the useClientSpec variable is true. After 'git p4 clone', the +useClientSpec variable is automatically set in the repository +configuration file. This allows future 'git p4 submit' commands to +work properly; the submit command looks only at the variable and does +not have a command-line option. + +The full syntax for a p4 view is documented in 'p4 help views'. 'git p4' +knows only a subset of the view syntax. It understands multi-line +mappings, overlays with '+', exclusions with '-' and double-quotes +around whitespace. Of the possible wildcards, 'git p4' only handles +'...', and only when it is at the end of the path. 'git p4' will complain +if it encounters an unhandled wildcard. + +Bugs in the implementation of overlap mappings exist. If multiple depot +paths map through overlays to the same location in the repository, +'git p4' can choose the wrong one. This is hard to solve without +dedicating a client spec just for 'git p4'. + +The name of the client can be given to 'git p4' in multiple ways. The +variable 'git-p4.client' takes precedence if it exists. Otherwise, +normal p4 mechanisms of determining the client are used: environment +variable P4CLIENT, a file referenced by P4CONFIG, or the local host name. + + +BRANCH DETECTION +---------------- +P4 does not have the same concept of a branch as Git. Instead, +p4 organizes its content as a directory tree, where by convention +different logical branches are in different locations in the tree. +The 'p4 branch' command is used to maintain mappings between +different areas in the tree, and indicate related content. 'git p4' +can use these mappings to determine branch relationships. + +If you have a repository where all the branches of interest exist as +subdirectories of a single depot path, you can use '--detect-branches' +when cloning or syncing to have 'git p4' automatically find +subdirectories in p4, and to generate these as branches in Git. + +For example, if the P4 repository structure is: +---- +//depot/main/... +//depot/branch1/... +---- + +And "p4 branch -o branch1" shows a View line that looks like: +---- +//depot/main/... //depot/branch1/... +---- + +Then this 'git p4 clone' command: +---- +git p4 clone --detect-branches //depot@all +---- +produces a separate branch in 'refs/remotes/p4/' for //depot/main, +called 'master', and one for //depot/branch1 called 'depot/branch1'. + +However, it is not necessary to create branches in p4 to be able to use +them like branches. Because it is difficult to infer branch +relationships automatically, a Git configuration setting +'git-p4.branchList' can be used to explicitly identify branch +relationships. It is a list of "source:destination" pairs, like a +simple p4 branch specification, where the "source" and "destination" are +the path elements in the p4 repository. The example above relied on the +presence of the p4 branch. Without p4 branches, the same result will +occur with: +---- +git init depot +cd depot +git config git-p4.branchList main:branch1 +git p4 clone --detect-branches //depot@all . +---- + + +PERFORMANCE +----------- +The fast-import mechanism used by 'git p4' creates one pack file for +each invocation of 'git p4 sync'. Normally, Git garbage compression +(linkgit:git-gc[1]) automatically compresses these to fewer pack files, +but explicit invocation of 'git repack -adf' may improve performance. + + +CONFIGURATION VARIABLES +----------------------- +The following config settings can be used to modify 'git p4' behavior. +They all are in the 'git-p4' section. + +General variables +~~~~~~~~~~~~~~~~~ +git-p4.user:: + User specified as an option to all p4 commands, with '-u <user>'. + The environment variable 'P4USER' can be used instead. + +git-p4.password:: + Password specified as an option to all p4 commands, with + '-P <password>'. + The environment variable 'P4PASS' can be used instead. + +git-p4.port:: + Port specified as an option to all p4 commands, with + '-p <port>'. + The environment variable 'P4PORT' can be used instead. + +git-p4.host:: + Host specified as an option to all p4 commands, with + '-h <host>'. + The environment variable 'P4HOST' can be used instead. + +git-p4.client:: + Client specified as an option to all p4 commands, with + '-c <client>', including the client spec. + +Clone and sync variables +~~~~~~~~~~~~~~~~~~~~~~~~ +git-p4.syncFromOrigin:: + Because importing commits from other Git repositories is much faster + than importing them from p4, a mechanism exists to find p4 changes + first in Git remotes. If branches exist under 'refs/remote/origin/p4', + those will be fetched and used when syncing from p4. This + variable can be set to 'false' to disable this behavior. + +git-p4.branchUser:: + One phase in branch detection involves looking at p4 branches + to find new ones to import. By default, all branches are + inspected. This option limits the search to just those owned + by the single user named in the variable. + +git-p4.branchList:: + List of branches to be imported when branch detection is + enabled. Each entry should be a pair of branch names separated + by a colon (:). This example declares that both branchA and + branchB were created from main: ++ +------------- +git config git-p4.branchList main:branchA +git config --add git-p4.branchList main:branchB +------------- + +git-p4.ignoredP4Labels:: + List of p4 labels to ignore. This is built automatically as + unimportable labels are discovered. + +git-p4.importLabels:: + Import p4 labels into git, as per --import-labels. + +git-p4.labelImportRegexp:: + Only p4 labels matching this regular expression will be imported. The + default value is '[a-zA-Z0-9_\-.]+$'. + +git-p4.useClientSpec:: + Specify that the p4 client spec should be used to identify p4 + depot paths of interest. This is equivalent to specifying the + option '--use-client-spec'. See the "CLIENT SPEC" section above. + This variable is a boolean, not the name of a p4 client. + +git-p4.pathEncoding:: + Perforce keeps the encoding of a path as given by the originating OS. + Git expects paths encoded as UTF-8. Use this config to tell git-p4 + what encoding Perforce had used for the paths. This encoding is used + to transcode the paths to UTF-8. As an example, Perforce on Windows + often uses "cp1252" to encode path names. + +git-p4.largeFileSystem:: + Specify the system that is used for large (binary) files. Please note + that large file systems do not support the 'git p4 submit' command. + Only Git LFS is implemented right now (see https://git-lfs.github.com/ + for more information). Download and install the Git LFS command line + extension to use this option and configure it like this: ++ +------------- +git config git-p4.largeFileSystem GitLFS +------------- + +git-p4.largeFileExtensions:: + All files matching a file extension in the list will be processed + by the large file system. Do not prefix the extensions with '.'. + +git-p4.largeFileThreshold:: + All files with an uncompressed size exceeding the threshold will be + processed by the large file system. By default the threshold is + defined in bytes. Add the suffix k, m, or g to change the unit. + +git-p4.largeFileCompressedThreshold:: + All files with a compressed size exceeding the threshold will be + processed by the large file system. This option might slow down + your clone/sync process. By default the threshold is defined in + bytes. Add the suffix k, m, or g to change the unit. + +git-p4.largeFilePush:: + Boolean variable which defines if large files are automatically + pushed to a server. + +git-p4.keepEmptyCommits:: + A changelist that contains only excluded files will be imported + as an empty commit if this boolean option is set to true. + +Submit variables +~~~~~~~~~~~~~~~~ +git-p4.detectRenames:: + Detect renames. See linkgit:git-diff[1]. This can be true, + false, or a score as expected by 'git diff -M'. + +git-p4.detectCopies:: + Detect copies. See linkgit:git-diff[1]. This can be true, + false, or a score as expected by 'git diff -C'. + +git-p4.detectCopiesHarder:: + Detect copies harder. See linkgit:git-diff[1]. A boolean. + +git-p4.preserveUser:: + On submit, re-author changes to reflect the Git author, + regardless of who invokes 'git p4 submit'. + +git-p4.allowMissingP4Users:: + When 'preserveUser' is true, 'git p4' normally dies if it + cannot find an author in the p4 user map. This setting + submits the change regardless. + +git-p4.skipSubmitEdit:: + The submit process invokes the editor before each p4 change + is submitted. If this setting is true, though, the editing + step is skipped. + +git-p4.skipSubmitEditCheck:: + After editing the p4 change message, 'git p4' makes sure that + the description really was changed by looking at the file + modification time. This option disables that test. + +git-p4.allowSubmit:: + By default, any branch can be used as the source for a 'git p4 + submit' operation. This configuration variable, if set, permits only + the named branches to be used as submit sources. Branch names + must be the short names (no "refs/heads/"), and should be + separated by commas (","), with no spaces. + +git-p4.skipUserNameCheck:: + If the user running 'git p4 submit' does not exist in the p4 + user map, 'git p4' exits. This option can be used to force + submission regardless. + +git-p4.attemptRCSCleanup:: + If enabled, 'git p4 submit' will attempt to cleanup RCS keywords + ($Header$, etc). These would otherwise cause merge conflicts and prevent + the submit going ahead. This option should be considered experimental at + present. + +git-p4.exportLabels:: + Export Git tags to p4 labels, as per --export-labels. + +git-p4.labelExportRegexp:: + Only p4 labels matching this regular expression will be exported. The + default value is '[a-zA-Z0-9_\-.]+$'. + +git-p4.conflict:: + Specify submit behavior when a conflict with p4 is found, as per + --conflict. The default behavior is 'ask'. + +IMPLEMENTATION DETAILS +---------------------- +* Changesets from p4 are imported using Git fast-import. +* Cloning or syncing does not require a p4 client; file contents are + collected using 'p4 print'. +* Submitting requires a p4 client, which is not in the same location + as the Git repository. Patches are applied, one at a time, to + this p4 client and submitted from there. +* Each commit imported by 'git p4' has a line at the end of the log + message indicating the p4 depot location and change number. This + line is used by later 'git p4 sync' operations to know which p4 + changes are new. diff --git a/Documentation/git-pack-objects.txt b/Documentation/git-pack-objects.txt new file mode 100644 index 0000000..19cdcd0 --- /dev/null +++ b/Documentation/git-pack-objects.txt @@ -0,0 +1,242 @@ +git-pack-objects(1) +=================== + +NAME +---- +git-pack-objects - Create a packed archive of objects + + +SYNOPSIS +-------- +[verse] +'git pack-objects' [-q | --progress | --all-progress] [--all-progress-implied] + [--no-reuse-delta] [--delta-base-offset] [--non-empty] + [--local] [--incremental] [--window=<n>] [--depth=<n>] + [--revs [--unpacked | --all]] [--stdout | base-name] + [--shallow] [--keep-true-parents] < object-list + + +DESCRIPTION +----------- +Reads list of objects from the standard input, and writes a packed +archive with specified base-name, or to the standard output. + +A packed archive is an efficient way to transfer a set of objects +between two repositories as well as an access efficient archival +format. In a packed archive, an object is either stored as a +compressed whole or as a difference from some other object. +The latter is often called a delta. + +The packed archive format (.pack) is designed to be self-contained +so that it can be unpacked without any further information. Therefore, +each object that a delta depends upon must be present within the pack. + +A pack index file (.idx) is generated for fast, random access to the +objects in the pack. Placing both the index file (.idx) and the packed +archive (.pack) in the pack/ subdirectory of $GIT_OBJECT_DIRECTORY (or +any of the directories on $GIT_ALTERNATE_OBJECT_DIRECTORIES) +enables Git to read from the pack archive. + +The 'git unpack-objects' command can read the packed archive and +expand the objects contained in the pack into "one-file +one-object" format; this is typically done by the smart-pull +commands when a pack is created on-the-fly for efficient network +transport by their peers. + + +OPTIONS +------- +base-name:: + Write into a pair of files (.pack and .idx), using + <base-name> to determine the name of the created file. + When this option is used, the two files are written in + <base-name>-<SHA-1>.{pack,idx} files. <SHA-1> is a hash + based on the pack content and is written to the standard + output of the command. + +--stdout:: + Write the pack contents (what would have been written to + .pack file) out to the standard output. + +--revs:: + Read the revision arguments from the standard input, instead of + individual object names. The revision arguments are processed + the same way as 'git rev-list' with the `--objects` flag + uses its `commit` arguments to build the list of objects it + outputs. The objects on the resulting list are packed. + Besides revisions, `--not` or `--shallow <SHA-1>` lines are + also accepted. + +--unpacked:: + This implies `--revs`. When processing the list of + revision arguments read from the standard input, limit + the objects packed to those that are not already packed. + +--all:: + This implies `--revs`. In addition to the list of + revision arguments read from the standard input, pretend + as if all refs under `refs/` are specified to be + included. + +--include-tag:: + Include unasked-for annotated tags if the object they + reference was included in the resulting packfile. This + can be useful to send new tags to native Git clients. + +--window=<n>:: +--depth=<n>:: + These two options affect how the objects contained in + the pack are stored using delta compression. The + objects are first internally sorted by type, size and + optionally names and compared against the other objects + within --window to see if using delta compression saves + space. --depth limits the maximum delta depth; making + it too deep affects the performance on the unpacker + side, because delta data needs to be applied that many + times to get to the necessary object. + The default value for --window is 10 and --depth is 50. + +--window-memory=<n>:: + This option provides an additional limit on top of `--window`; + the window size will dynamically scale down so as to not take + up more than '<n>' bytes in memory. This is useful in + repositories with a mix of large and small objects to not run + out of memory with a large window, but still be able to take + advantage of the large window for the smaller objects. The + size can be suffixed with "k", "m", or "g". + `--window-memory=0` makes memory usage unlimited, which is the + default. + +--max-pack-size=<n>:: + Maximum size of each output pack file. The size can be suffixed with + "k", "m", or "g". The minimum size allowed is limited to 1 MiB. + If specified, multiple packfiles may be created, which also + prevents the creation of a bitmap index. + The default is unlimited, unless the config variable + `pack.packSizeLimit` is set. + +--honor-pack-keep:: + This flag causes an object already in a local pack that + has a .keep file to be ignored, even if it would have + otherwise been packed. + +--incremental:: + This flag causes an object already in a pack to be ignored + even if it would have otherwise been packed. + +--local:: + This flag causes an object that is borrowed from an alternate + object store to be ignored even if it would have otherwise been + packed. + +--non-empty:: + Only create a packed archive if it would contain at + least one object. + +--progress:: + Progress status is reported on the standard error stream + by default when it is attached to a terminal, unless -q + is specified. This flag forces progress status even if + the standard error stream is not directed to a terminal. + +--all-progress:: + When --stdout is specified then progress report is + displayed during the object count and compression phases + but inhibited during the write-out phase. The reason is + that in some cases the output stream is directly linked + to another command which may wish to display progress + status of its own as it processes incoming pack data. + This flag is like --progress except that it forces progress + report for the write-out phase as well even if --stdout is + used. + +--all-progress-implied:: + This is used to imply --all-progress whenever progress display + is activated. Unlike --all-progress this flag doesn't actually + force any progress display by itself. + +-q:: + This flag makes the command not to report its progress + on the standard error stream. + +--no-reuse-delta:: + When creating a packed archive in a repository that + has existing packs, the command reuses existing deltas. + This sometimes results in a slightly suboptimal pack. + This flag tells the command not to reuse existing deltas + but compute them from scratch. + +--no-reuse-object:: + This flag tells the command not to reuse existing object data at all, + including non deltified object, forcing recompression of everything. + This implies --no-reuse-delta. Useful only in the obscure case where + wholesale enforcement of a different compression level on the + packed data is desired. + +--compression=<n>:: + Specifies compression level for newly-compressed data in the + generated pack. If not specified, pack compression level is + determined first by pack.compression, then by core.compression, + and defaults to -1, the zlib default, if neither is set. + Add --no-reuse-object if you want to force a uniform compression + level on all data no matter the source. + +--thin:: + Create a "thin" pack by omitting the common objects between a + sender and a receiver in order to reduce network transfer. This + option only makes sense in conjunction with --stdout. ++ +Note: A thin pack violates the packed archive format by omitting +required objects and is thus unusable by Git without making it +self-contained. Use `git index-pack --fix-thin` +(see linkgit:git-index-pack[1]) to restore the self-contained property. + +--shallow:: + Optimize a pack that will be provided to a client with a shallow + repository. This option, combined with --thin, can result in a + smaller pack at the cost of speed. + +--delta-base-offset:: + A packed archive can express the base object of a delta as + either a 20-byte object name or as an offset in the + stream, but ancient versions of Git don't understand the + latter. By default, 'git pack-objects' only uses the + former format for better compatibility. This option + allows the command to use the latter format for + compactness. Depending on the average delta chain + length, this option typically shrinks the resulting + packfile by 3-5 per-cent. ++ +Note: Porcelain commands such as `git gc` (see linkgit:git-gc[1]), +`git repack` (see linkgit:git-repack[1]) pass this option by default +in modern Git when they put objects in your repository into pack files. +So does `git bundle` (see linkgit:git-bundle[1]) when it creates a bundle. + +--threads=<n>:: + Specifies the number of threads to spawn when searching for best + delta matches. This requires that pack-objects be compiled with + pthreads otherwise this option is ignored with a warning. + This is meant to reduce packing time on multiprocessor machines. + The required amount of memory for the delta search window is + however multiplied by the number of threads. + Specifying 0 will cause Git to auto-detect the number of CPU's + and set the number of threads accordingly. + +--index-version=<version>[,<offset>]:: + This is intended to be used by the test suite only. It allows + to force the version for the generated pack index, and to force + 64-bit index entries on objects located above the given offset. + +--keep-true-parents:: + With this option, parents that are hidden by grafts are packed + nevertheless. + +SEE ALSO +-------- +linkgit:git-rev-list[1] +linkgit:git-repack[1] +linkgit:git-prune-packed[1] + +GIT +--- +Part of the linkgit:git[1] suite diff --git a/Documentation/git-pack-redundant.txt b/Documentation/git-pack-redundant.txt new file mode 100644 index 0000000..f2869da --- /dev/null +++ b/Documentation/git-pack-redundant.txt @@ -0,0 +1,50 @@ +git-pack-redundant(1) +===================== + +NAME +---- +git-pack-redundant - Find redundant pack files + + +SYNOPSIS +-------- +[verse] +'git pack-redundant' [ --verbose ] [ --alt-odb ] < --all | .pack filename ... > + +DESCRIPTION +----------- +This program computes which packs in your repository +are redundant. The output is suitable for piping to +`xargs rm` if you are in the root of the repository. + +'git pack-redundant' accepts a list of objects on standard input. Any objects +given will be ignored when checking which packs are required. This makes the +following command useful when wanting to remove packs which contain unreachable +objects. + +git fsck --full --unreachable | cut -d ' ' -f3 | \ +git pack-redundant --all | xargs rm + +OPTIONS +------- + + +--all:: + Processes all packs. Any filenames on the command line are ignored. + +--alt-odb:: + Don't require objects present in packs from alternate object + directories to be present in local packs. + +--verbose:: + Outputs some statistics to stderr. Has a small performance penalty. + +SEE ALSO +-------- +linkgit:git-pack-objects[1] +linkgit:git-repack[1] +linkgit:git-prune-packed[1] + +GIT +--- +Part of the linkgit:git[1] suite diff --git a/Documentation/git-pack-refs.txt b/Documentation/git-pack-refs.txt new file mode 100644 index 0000000..154081f --- /dev/null +++ b/Documentation/git-pack-refs.txt @@ -0,0 +1,73 @@ +git-pack-refs(1) +================ + +NAME +---- +git-pack-refs - Pack heads and tags for efficient repository access + +SYNOPSIS +-------- +[verse] +'git pack-refs' [--all] [--no-prune] + +DESCRIPTION +----------- + +Traditionally, tips of branches and tags (collectively known as +'refs') were stored one file per ref in a (sub)directory +under `$GIT_DIR/refs` +directory. While many branch tips tend to be updated often, +most tags and some branch tips are never updated. When a +repository has hundreds or thousands of tags, this +one-file-per-ref format both wastes storage and hurts +performance. + +This command is used to solve the storage and performance +problem by storing the refs in a single file, +`$GIT_DIR/packed-refs`. When a ref is missing from the +traditional `$GIT_DIR/refs` directory hierarchy, it is looked +up in this +file and used if found. + +Subsequent updates to branches always create new files under +`$GIT_DIR/refs` directory hierarchy. + +A recommended practice to deal with a repository with too many +refs is to pack its refs with `--all` once, and +occasionally run `git pack-refs`. Tags are by +definition stationary and are not expected to change. Branch +heads will be packed with the initial `pack-refs --all`, but +only the currently active branch heads will become unpacked, +and the next `pack-refs` (without `--all`) will leave them +unpacked. + + +OPTIONS +------- + +--all:: + +The command by default packs all tags and refs that are already +packed, and leaves other refs +alone. This is because branches are expected to be actively +developed and packing their tips does not help performance. +This option causes branch tips to be packed as well. Useful for +a repository with many branches of historical interests. + +--no-prune:: + +The command usually removes loose refs under `$GIT_DIR/refs` +hierarchy after packing them. This option tells it not to. + + +BUGS +---- + +Older documentation written before the packed-refs mechanism was +introduced may still say things like ".git/refs/heads/<branch> file +exists" when it means "branch <branch> exists". + + +GIT +--- +Part of the linkgit:git[1] suite diff --git a/Documentation/git-parse-remote.txt b/Documentation/git-parse-remote.txt new file mode 100644 index 0000000..a45ea1e --- /dev/null +++ b/Documentation/git-parse-remote.txt @@ -0,0 +1,23 @@ +git-parse-remote(1) +=================== + +NAME +---- +git-parse-remote - Routines to help parsing remote repository access parameters + + +SYNOPSIS +-------- +[verse] +'. "$(git --exec-path)/git-parse-remote"' + +DESCRIPTION +----------- +This script is included in various scripts to supply +routines to parse files under $GIT_DIR/remotes/ and +$GIT_DIR/branches/ and configuration variables that are related +to fetching, pulling and pushing. + +GIT +--- +Part of the linkgit:git[1] suite diff --git a/Documentation/git-patch-id.txt b/Documentation/git-patch-id.txt new file mode 100644 index 0000000..cf71fba --- /dev/null +++ b/Documentation/git-patch-id.txt @@ -0,0 +1,64 @@ +git-patch-id(1) +=============== + +NAME +---- +git-patch-id - Compute unique ID for a patch + +SYNOPSIS +-------- +[verse] +'git patch-id' [--stable | --unstable] + +DESCRIPTION +----------- +Read a patch from the standard input and compute the patch ID for it. + +A "patch ID" is nothing but a sum of SHA-1 of the file diffs associated with a +patch, with whitespace and line numbers ignored. As such, it's "reasonably +stable", but at the same time also reasonably unique, i.e., two patches that +have the same "patch ID" are almost guaranteed to be the same thing. + +IOW, you can use this thing to look for likely duplicate commits. + +When dealing with 'git diff-tree' output, it takes advantage of +the fact that the patch is prefixed with the object name of the +commit, and outputs two 40-byte hexadecimal strings. The first +string is the patch ID, and the second string is the commit ID. +This can be used to make a mapping from patch ID to commit ID. + +OPTIONS +------- + +--stable:: + Use a "stable" sum of hashes as the patch ID. With this option: + - Reordering file diffs that make up a patch does not affect the ID. + In particular, two patches produced by comparing the same two trees + with two different settings for "-O<orderfile>" result in the same + patch ID signature, thereby allowing the computed result to be used + as a key to index some meta-information about the change between + the two trees; + + - Result is different from the value produced by git 1.9 and older + or produced when an "unstable" hash (see --unstable below) is + configured - even when used on a diff output taken without any use + of "-O<orderfile>", thereby making existing databases storing such + "unstable" or historical patch-ids unusable. + + This is the default if patchid.stable is set to true. + +--unstable:: + Use an "unstable" hash as the patch ID. With this option, + the result produced is compatible with the patch-id value produced + by git 1.9 and older. Users with pre-existing databases storing + patch-ids produced by git 1.9 and older (who do not deal with reordered + patches) may want to use this option. + + This is the default. + +<patch>:: + The diff to create the ID of. + +GIT +--- +Part of the linkgit:git[1] suite diff --git a/Documentation/git-prune-packed.txt b/Documentation/git-prune-packed.txt new file mode 100644 index 0000000..9fed59a --- /dev/null +++ b/Documentation/git-prune-packed.txt @@ -0,0 +1,47 @@ +git-prune-packed(1) +=================== + +NAME +---- +git-prune-packed - Remove extra objects that are already in pack files + + +SYNOPSIS +-------- +[verse] +'git prune-packed' [-n|--dry-run] [-q|--quiet] + + +DESCRIPTION +----------- +This program searches the `$GIT_OBJECT_DIRECTORY` for all objects that currently +exist in a pack file as well as the independent object directories. + +All such extra objects are removed. + +A pack is a collection of objects, individually compressed, with delta +compression applied, stored in a single file, with an associated index file. + +Packs are used to reduce the load on mirror systems, backup engines, +disk storage, etc. + + +OPTIONS +------- +-n:: +--dry-run:: + Don't actually remove any objects, only show those that would have been + removed. + +-q:: +--quiet:: + Squelch the progress indicator. + +SEE ALSO +-------- +linkgit:git-pack-objects[1] +linkgit:git-repack[1] + +GIT +--- +Part of the linkgit:git[1] suite diff --git a/Documentation/git-prune.txt b/Documentation/git-prune.txt new file mode 100644 index 0000000..7a493c8 --- /dev/null +++ b/Documentation/git-prune.txt @@ -0,0 +1,86 @@ +git-prune(1) +============ + +NAME +---- +git-prune - Prune all unreachable objects from the object database + + +SYNOPSIS +-------- +[verse] +'git prune' [-n] [-v] [--expire <expire>] [--] [<head>...] + +DESCRIPTION +----------- + +NOTE: In most cases, users should run 'git gc', which calls +'git prune'. See the section "NOTES", below. + +This runs 'git fsck --unreachable' using all the refs +available in `refs/`, optionally with additional set of +objects specified on the command line, and prunes all unpacked +objects unreachable from any of these head objects from the object database. +In addition, it +prunes the unpacked objects that are also found in packs by +running 'git prune-packed'. +It also removes entries from .git/shallow that are not reachable by +any ref. + +Note that unreachable, packed objects will remain. If this is +not desired, see linkgit:git-repack[1]. + +OPTIONS +------- + +-n:: +--dry-run:: + Do not remove anything; just report what it would + remove. + +-v:: +--verbose:: + Report all removed objects. + +\--:: + Do not interpret any more arguments as options. + +--expire <time>:: + Only expire loose objects older than <time>. + +<head>...:: + In addition to objects + reachable from any of our references, keep objects + reachable from listed <head>s. + +EXAMPLE +------- + +To prune objects not used by your repository or another that +borrows from your repository via its +`.git/objects/info/alternates`: + +------------ +$ git prune $(cd ../another && git rev-parse --all) +------------ + +Notes +----- + +In most cases, users will not need to call 'git prune' directly, but +should instead call 'git gc', which handles pruning along with +many other housekeeping tasks. + +For a description of which objects are considered for pruning, see +'git fsck''s --unreachable option. + +SEE ALSO +-------- + +linkgit:git-fsck[1], +linkgit:git-gc[1], +linkgit:git-reflog[1] + +GIT +--- +Part of the linkgit:git[1] suite diff --git a/Documentation/git-pull.txt b/Documentation/git-pull.txt new file mode 100644 index 0000000..a62a2a6 --- /dev/null +++ b/Documentation/git-pull.txt @@ -0,0 +1,246 @@ +git-pull(1) +=========== + +NAME +---- +git-pull - Fetch from and integrate with another repository or a local branch + + +SYNOPSIS +-------- +[verse] +'git pull' [options] [<repository> [<refspec>...]] + + +DESCRIPTION +----------- + +Incorporates changes from a remote repository into the current +branch. In its default mode, `git pull` is shorthand for +`git fetch` followed by `git merge FETCH_HEAD`. + +More precisely, 'git pull' runs 'git fetch' with the given +parameters and calls 'git merge' to merge the retrieved branch +heads into the current branch. +With `--rebase`, it runs 'git rebase' instead of 'git merge'. + +<repository> should be the name of a remote repository as +passed to linkgit:git-fetch[1]. <refspec> can name an +arbitrary remote ref (for example, the name of a tag) or even +a collection of refs with corresponding remote-tracking branches +(e.g., refs/heads/{asterisk}:refs/remotes/origin/{asterisk}), +but usually it is the name of a branch in the remote repository. + +Default values for <repository> and <branch> are read from the +"remote" and "merge" configuration for the current branch +as set by linkgit:git-branch[1] `--track`. + +Assume the following history exists and the current branch is +"`master`": + +------------ + A---B---C master on origin + / + D---E---F---G master + ^ + origin/master in your repository +------------ + +Then "`git pull`" will fetch and replay the changes from the remote +`master` branch since it diverged from the local `master` (i.e., `E`) +until its current commit (`C`) on top of `master` and record the +result in a new commit along with the names of the two parent commits +and a log message from the user describing the changes. + +------------ + A---B---C origin/master + / \ + D---E---F---G---H master +------------ + +See linkgit:git-merge[1] for details, including how conflicts +are presented and handled. + +In Git 1.7.0 or later, to cancel a conflicting merge, use +`git reset --merge`. *Warning*: In older versions of Git, running 'git pull' +with uncommitted changes is discouraged: while possible, it leaves you +in a state that may be hard to back out of in the case of a conflict. + +If any of the remote changes overlap with local uncommitted changes, +the merge will be automatically cancelled and the work tree untouched. +It is generally best to get any local changes in working order before +pulling or stash them away with linkgit:git-stash[1]. + +OPTIONS +------- + +-q:: +--quiet:: + This is passed to both underlying git-fetch to squelch reporting of + during transfer, and underlying git-merge to squelch output during + merging. + +-v:: +--verbose:: + Pass --verbose to git-fetch and git-merge. + +--[no-]recurse-submodules[=yes|on-demand|no]:: + This option controls if new commits of all populated submodules should + be fetched too (see linkgit:git-config[1] and linkgit:gitmodules[5]). + That might be necessary to get the data needed for merging submodule + commits, a feature Git learned in 1.7.3. Notice that the result of a + merge will not be checked out in the submodule, "git submodule update" + has to be called afterwards to bring the work tree up to date with the + merge result. + +Options related to merging +~~~~~~~~~~~~~~~~~~~~~~~~~~ + +:git-pull: 1 + +include::merge-options.txt[] + +-r:: +--rebase[=false|true|preserve|interactive]:: + When true, rebase the current branch on top of the upstream + branch after fetching. If there is a remote-tracking branch + corresponding to the upstream branch and the upstream branch + was rebased since last fetched, the rebase uses that information + to avoid rebasing non-local changes. ++ +When set to preserve, rebase with the `--preserve-merges` option passed +to `git rebase` so that locally created merge commits will not be flattened. ++ +When false, merge the current branch into the upstream branch. ++ +When `interactive`, enable the interactive mode of rebase. ++ +See `pull.rebase`, `branch.<name>.rebase` and `branch.autoSetupRebase` in +linkgit:git-config[1] if you want to make `git pull` always use +`--rebase` instead of merging. ++ +[NOTE] +This is a potentially _dangerous_ mode of operation. +It rewrites history, which does not bode well when you +published that history already. Do *not* use this option +unless you have read linkgit:git-rebase[1] carefully. + +--no-rebase:: + Override earlier --rebase. + +Options related to fetching +~~~~~~~~~~~~~~~~~~~~~~~~~~~ + +include::fetch-options.txt[] + +include::pull-fetch-param.txt[] + +include::urls-remotes.txt[] + +include::merge-strategies.txt[] + +DEFAULT BEHAVIOUR +----------------- + +Often people use `git pull` without giving any parameter. +Traditionally, this has been equivalent to saying `git pull +origin`. However, when configuration `branch.<name>.remote` is +present while on branch `<name>`, that value is used instead of +`origin`. + +In order to determine what URL to use to fetch from, the value +of the configuration `remote.<origin>.url` is consulted +and if there is not any such variable, the value on `URL: ` line +in `$GIT_DIR/remotes/<origin>` file is used. + +In order to determine what remote branches to fetch (and +optionally store in the remote-tracking branches) when the command is +run without any refspec parameters on the command line, values +of the configuration variable `remote.<origin>.fetch` are +consulted, and if there aren't any, `$GIT_DIR/remotes/<origin>` +file is consulted and its `Pull: ` lines are used. +In addition to the refspec formats described in the OPTIONS +section, you can have a globbing refspec that looks like this: + +------------ +refs/heads/*:refs/remotes/origin/* +------------ + +A globbing refspec must have a non-empty RHS (i.e. must store +what were fetched in remote-tracking branches), and its LHS and RHS +must end with `/*`. The above specifies that all remote +branches are tracked using remote-tracking branches in +`refs/remotes/origin/` hierarchy under the same name. + +The rule to determine which remote branch to merge after +fetching is a bit involved, in order not to break backward +compatibility. + +If explicit refspecs were given on the command +line of `git pull`, they are all merged. + +When no refspec was given on the command line, then `git pull` +uses the refspec from the configuration or +`$GIT_DIR/remotes/<origin>`. In such cases, the following +rules apply: + +. If `branch.<name>.merge` configuration for the current + branch `<name>` exists, that is the name of the branch at the + remote site that is merged. + +. If the refspec is a globbing one, nothing is merged. + +. Otherwise the remote branch of the first refspec is merged. + + +EXAMPLES +-------- + +* Update the remote-tracking branches for the repository + you cloned from, then merge one of them into your + current branch: ++ +------------------------------------------------ +$ git pull, git pull origin +------------------------------------------------ ++ +Normally the branch merged in is the HEAD of the remote repository, +but the choice is determined by the branch.<name>.remote and +branch.<name>.merge options; see linkgit:git-config[1] for details. + +* Merge into the current branch the remote branch `next`: ++ +------------------------------------------------ +$ git pull origin next +------------------------------------------------ ++ +This leaves a copy of `next` temporarily in FETCH_HEAD, but +does not update any remote-tracking branches. Using remote-tracking +branches, the same can be done by invoking fetch and merge: ++ +------------------------------------------------ +$ git fetch origin +$ git merge origin/next +------------------------------------------------ + + +If you tried a pull which resulted in complex conflicts and +would want to start over, you can recover with 'git reset'. + + +BUGS +---- +Using --recurse-submodules can only fetch new commits in already checked +out submodules right now. When e.g. upstream added a new submodule in the +just fetched commits of the superproject the submodule itself can not be +fetched, making it impossible to check out that submodule later without +having to do a fetch again. This is expected to be fixed in a future Git +version. + +SEE ALSO +-------- +linkgit:git-fetch[1], linkgit:git-merge[1], linkgit:git-config[1] + +GIT +--- +Part of the linkgit:git[1] suite diff --git a/Documentation/git-push.txt b/Documentation/git-push.txt new file mode 100644 index 0000000..cf6ee4a --- /dev/null +++ b/Documentation/git-push.txt @@ -0,0 +1,557 @@ +git-push(1) +=========== + +NAME +---- +git-push - Update remote refs along with associated objects + + +SYNOPSIS +-------- +[verse] +'git push' [--all | --mirror | --tags] [--follow-tags] [--atomic] [-n | --dry-run] [--receive-pack=<git-receive-pack>] + [--repo=<repository>] [-f | --force] [-d | --delete] [--prune] [-v | --verbose] + [-u | --set-upstream] + [--[no-]signed|--sign=(true|false|if-asked)] + [--force-with-lease[=<refname>[:<expect>]]] + [--no-verify] [<repository> [<refspec>...]] + +DESCRIPTION +----------- + +Updates remote refs using local refs, while sending objects +necessary to complete the given refs. + +You can make interesting things happen to a repository +every time you push into it, by setting up 'hooks' there. See +documentation for linkgit:git-receive-pack[1]. + +When the command line does not specify where to push with the +`<repository>` argument, `branch.*.remote` configuration for the +current branch is consulted to determine where to push. If the +configuration is missing, it defaults to 'origin'. + +When the command line does not specify what to push with `<refspec>...` +arguments or `--all`, `--mirror`, `--tags` options, the command finds +the default `<refspec>` by consulting `remote.*.push` configuration, +and if it is not found, honors `push.default` configuration to decide +what to push (See linkgit:git-config[1] for the meaning of `push.default`). + +When neither the command-line nor the configuration specify what to +push, the default behavior is used, which corresponds to the `simple` +value for `push.default`: the current branch is pushed to the +corresponding upstream branch, but as a safety measure, the push is +aborted if the upstream branch does not have the same name as the +local one. + + +OPTIONS[[OPTIONS]] +------------------ +<repository>:: + The "remote" repository that is destination of a push + operation. This parameter can be either a URL + (see the section <<URLS,GIT URLS>> below) or the name + of a remote (see the section <<REMOTES,REMOTES>> below). + +<refspec>...:: + Specify what destination ref to update with what source object. + The format of a <refspec> parameter is an optional plus + `+`, followed by the source object <src>, followed + by a colon `:`, followed by the destination ref <dst>. ++ +The <src> is often the name of the branch you would want to push, but +it can be any arbitrary "SHA-1 expression", such as `master~4` or +`HEAD` (see linkgit:gitrevisions[7]). ++ +The <dst> tells which ref on the remote side is updated with this +push. Arbitrary expressions cannot be used here, an actual ref must +be named. +If `git push [<repository>]` without any `<refspec>` argument is set to +update some ref at the destination with `<src>` with +`remote.<repository>.push` configuration variable, `:<dst>` part can +be omitted--such a push will update a ref that `<src>` normally updates +without any `<refspec>` on the command line. Otherwise, missing +`:<dst>` means to update the same ref as the `<src>`. ++ +The object referenced by <src> is used to update the <dst> reference +on the remote side. By default this is only allowed if <dst> is not +a tag (annotated or lightweight), and then only if it can fast-forward +<dst>. By having the optional leading `+`, you can tell Git to update +the <dst> ref even if it is not allowed by default (e.g., it is not a +fast-forward.) This does *not* attempt to merge <src> into <dst>. See +EXAMPLES below for details. ++ +`tag <tag>` means the same as `refs/tags/<tag>:refs/tags/<tag>`. ++ +Pushing an empty <src> allows you to delete the <dst> ref from +the remote repository. ++ +The special refspec `:` (or `+:` to allow non-fast-forward updates) +directs Git to push "matching" branches: for every branch that exists on +the local side, the remote side is updated if a branch of the same name +already exists on the remote side. + +--all:: + Push all branches (i.e. refs under `refs/heads/`); cannot be + used with other <refspec>. + +--prune:: + Remove remote branches that don't have a local counterpart. For example + a remote branch `tmp` will be removed if a local branch with the same + name doesn't exist any more. This also respects refspecs, e.g. + `git push --prune remote refs/heads/*:refs/tmp/*` would + make sure that remote `refs/tmp/foo` will be removed if `refs/heads/foo` + doesn't exist. + +--mirror:: + Instead of naming each ref to push, specifies that all + refs under `refs/` (which includes but is not + limited to `refs/heads/`, `refs/remotes/`, and `refs/tags/`) + be mirrored to the remote repository. Newly created local + refs will be pushed to the remote end, locally updated refs + will be force updated on the remote end, and deleted refs + will be removed from the remote end. This is the default + if the configuration option `remote.<remote>.mirror` is + set. + +-n:: +--dry-run:: + Do everything except actually send the updates. + +--porcelain:: + Produce machine-readable output. The output status line for each ref + will be tab-separated and sent to stdout instead of stderr. The full + symbolic names of the refs will be given. + +--delete:: + All listed refs are deleted from the remote repository. This is + the same as prefixing all refs with a colon. + +--tags:: + All refs under `refs/tags` are pushed, in + addition to refspecs explicitly listed on the command + line. + +--follow-tags:: + Push all the refs that would be pushed without this option, + and also push annotated tags in `refs/tags` that are missing + from the remote but are pointing at commit-ish that are + reachable from the refs being pushed. This can also be specified + with configuration variable 'push.followTags'. For more + information, see 'push.followTags' in linkgit:git-config[1]. + +--[no-]signed:: +--sign=(true|false|if-asked):: + GPG-sign the push request to update refs on the receiving + side, to allow it to be checked by the hooks and/or be + logged. If `false` or `--no-signed`, no signing will be + attempted. If `true` or `--signed`, the push will fail if the + server does not support signed pushes. If set to `if-asked`, + sign if and only if the server supports signed pushes. The push + will also fail if the actual call to `gpg --sign` fails. See + linkgit:git-receive-pack[1] for the details on the receiving end. + +--[no-]atomic:: + Use an atomic transaction on the remote side if available. + Either all refs are updated, or on error, no refs are updated. + If the server does not support atomic pushes the push will fail. + +--receive-pack=<git-receive-pack>:: +--exec=<git-receive-pack>:: + Path to the 'git-receive-pack' program on the remote + end. Sometimes useful when pushing to a remote + repository over ssh, and you do not have the program in + a directory on the default $PATH. + +--[no-]force-with-lease:: +--force-with-lease=<refname>:: +--force-with-lease=<refname>:<expect>:: + Usually, "git push" refuses to update a remote ref that is + not an ancestor of the local ref used to overwrite it. ++ +This option overrides this restriction if the current value of the +remote ref is the expected value. "git push" fails otherwise. ++ +Imagine that you have to rebase what you have already published. +You will have to bypass the "must fast-forward" rule in order to +replace the history you originally published with the rebased history. +If somebody else built on top of your original history while you are +rebasing, the tip of the branch at the remote may advance with her +commit, and blindly pushing with `--force` will lose her work. ++ +This option allows you to say that you expect the history you are +updating is what you rebased and want to replace. If the remote ref +still points at the commit you specified, you can be sure that no +other people did anything to the ref. It is like taking a "lease" on +the ref without explicitly locking it, and the remote ref is updated +only if the "lease" is still valid. ++ +`--force-with-lease` alone, without specifying the details, will protect +all remote refs that are going to be updated by requiring their +current value to be the same as the remote-tracking branch we have +for them. ++ +`--force-with-lease=<refname>`, without specifying the expected value, will +protect the named ref (alone), if it is going to be updated, by +requiring its current value to be the same as the remote-tracking +branch we have for it. ++ +`--force-with-lease=<refname>:<expect>` will protect the named ref (alone), +if it is going to be updated, by requiring its current value to be +the same as the specified value <expect> (which is allowed to be +different from the remote-tracking branch we have for the refname, +or we do not even have to have such a remote-tracking branch when +this form is used). ++ +Note that all forms other than `--force-with-lease=<refname>:<expect>` +that specifies the expected current value of the ref explicitly are +still experimental and their semantics may change as we gain experience +with this feature. ++ +"--no-force-with-lease" will cancel all the previous --force-with-lease on the +command line. + +-f:: +--force:: + Usually, the command refuses to update a remote ref that is + not an ancestor of the local ref used to overwrite it. + Also, when `--force-with-lease` option is used, the command refuses + to update a remote ref whose current value does not match + what is expected. ++ +This flag disables these checks, and can cause the remote repository +to lose commits; use it with care. ++ +Note that `--force` applies to all the refs that are pushed, hence +using it with `push.default` set to `matching` or with multiple push +destinations configured with `remote.*.push` may overwrite refs +other than the current branch (including local refs that are +strictly behind their remote counterpart). To force a push to only +one branch, use a `+` in front of the refspec to push (e.g `git push +origin +master` to force a push to the `master` branch). See the +`<refspec>...` section above for details. + +--repo=<repository>:: + This option is equivalent to the <repository> argument. If both + are specified, the command-line argument takes precedence. + +-u:: +--set-upstream:: + For every branch that is up to date or successfully pushed, add + upstream (tracking) reference, used by argument-less + linkgit:git-pull[1] and other commands. For more information, + see 'branch.<name>.merge' in linkgit:git-config[1]. + +--[no-]thin:: + These options are passed to linkgit:git-send-pack[1]. A thin transfer + significantly reduces the amount of sent data when the sender and + receiver share many of the same objects in common. The default is + \--thin. + +-q:: +--quiet:: + Suppress all output, including the listing of updated refs, + unless an error occurs. Progress is not reported to the standard + error stream. + +-v:: +--verbose:: + Run verbosely. + +--progress:: + Progress status is reported on the standard error stream + by default when it is attached to a terminal, unless -q + is specified. This flag forces progress status even if the + standard error stream is not directed to a terminal. + +--no-recurse-submodules:: +--recurse-submodules=check|on-demand|no:: + May be used to make sure all submodule commits used by the + revisions to be pushed are available on a remote-tracking branch. + If 'check' is used Git will verify that all submodule commits that + changed in the revisions to be pushed are available on at least one + remote of the submodule. If any commits are missing the push will + be aborted and exit with non-zero status. If 'on-demand' is used + all submodules that changed in the revisions to be pushed will be + pushed. If on-demand was not able to push all necessary revisions + it will also be aborted and exit with non-zero status. A value of + 'no' or using '--no-recurse-submodules' can be used to override the + push.recurseSubmodules configuration variable when no submodule + recursion is required. + +--[no-]verify:: + Toggle the pre-push hook (see linkgit:githooks[5]). The + default is --verify, giving the hook a chance to prevent the + push. With --no-verify, the hook is bypassed completely. + +-4:: +--ipv4:: + Use IPv4 addresses only, ignoring IPv6 addresses. + +-6:: +--ipv6:: + Use IPv6 addresses only, ignoring IPv4 addresses. + +include::urls-remotes.txt[] + +OUTPUT +------ + +The output of "git push" depends on the transport method used; this +section describes the output when pushing over the Git protocol (either +locally or via ssh). + +The status of the push is output in tabular form, with each line +representing the status of a single ref. Each line is of the form: + +------------------------------- + <flag> <summary> <from> -> <to> (<reason>) +------------------------------- + +If --porcelain is used, then each line of the output is of the form: + +------------------------------- + <flag> \t <from>:<to> \t <summary> (<reason>) +------------------------------- + +The status of up-to-date refs is shown only if --porcelain or --verbose +option is used. + +flag:: + A single character indicating the status of the ref: +(space);; for a successfully pushed fast-forward; +`+`;; for a successful forced update; +`-`;; for a successfully deleted ref; +`*`;; for a successfully pushed new ref; +`!`;; for a ref that was rejected or failed to push; and +`=`;; for a ref that was up to date and did not need pushing. + +summary:: + For a successfully pushed ref, the summary shows the old and new + values of the ref in a form suitable for using as an argument to + `git log` (this is `<old>..<new>` in most cases, and + `<old>...<new>` for forced non-fast-forward updates). ++ +For a failed update, more details are given: ++ +-- +rejected:: + Git did not try to send the ref at all, typically because it + is not a fast-forward and you did not force the update. + +remote rejected:: + The remote end refused the update. Usually caused by a hook + on the remote side, or because the remote repository has one + of the following safety options in effect: + `receive.denyCurrentBranch` (for pushes to the checked out + branch), `receive.denyNonFastForwards` (for forced + non-fast-forward updates), `receive.denyDeletes` or + `receive.denyDeleteCurrent`. See linkgit:git-config[1]. + +remote failure:: + The remote end did not report the successful update of the ref, + perhaps because of a temporary error on the remote side, a + break in the network connection, or other transient error. +-- + +from:: + The name of the local ref being pushed, minus its + `refs/<type>/` prefix. In the case of deletion, the + name of the local ref is omitted. + +to:: + The name of the remote ref being updated, minus its + `refs/<type>/` prefix. + +reason:: + A human-readable explanation. In the case of successfully pushed + refs, no explanation is needed. For a failed ref, the reason for + failure is described. + +Note about fast-forwards +------------------------ + +When an update changes a branch (or more in general, a ref) that used to +point at commit A to point at another commit B, it is called a +fast-forward update if and only if B is a descendant of A. + +In a fast-forward update from A to B, the set of commits that the original +commit A built on top of is a subset of the commits the new commit B +builds on top of. Hence, it does not lose any history. + +In contrast, a non-fast-forward update will lose history. For example, +suppose you and somebody else started at the same commit X, and you built +a history leading to commit B while the other person built a history +leading to commit A. The history looks like this: + +---------------- + + B + / + ---X---A + +---------------- + +Further suppose that the other person already pushed changes leading to A +back to the original repository from which you two obtained the original +commit X. + +The push done by the other person updated the branch that used to point at +commit X to point at commit A. It is a fast-forward. + +But if you try to push, you will attempt to update the branch (that +now points at A) with commit B. This does _not_ fast-forward. If you did +so, the changes introduced by commit A will be lost, because everybody +will now start building on top of B. + +The command by default does not allow an update that is not a fast-forward +to prevent such loss of history. + +If you do not want to lose your work (history from X to B) or the work by +the other person (history from X to A), you would need to first fetch the +history from the repository, create a history that contains changes done +by both parties, and push the result back. + +You can perform "git pull", resolve potential conflicts, and "git push" +the result. A "git pull" will create a merge commit C between commits A +and B. + +---------------- + + B---C + / / + ---X---A + +---------------- + +Updating A with the resulting merge commit will fast-forward and your +push will be accepted. + +Alternatively, you can rebase your change between X and B on top of A, +with "git pull --rebase", and push the result back. The rebase will +create a new commit D that builds the change between X and B on top of +A. + +---------------- + + B D + / / + ---X---A + +---------------- + +Again, updating A with this commit will fast-forward and your push will be +accepted. + +There is another common situation where you may encounter non-fast-forward +rejection when you try to push, and it is possible even when you are +pushing into a repository nobody else pushes into. After you push commit +A yourself (in the first picture in this section), replace it with "git +commit --amend" to produce commit B, and you try to push it out, because +forgot that you have pushed A out already. In such a case, and only if +you are certain that nobody in the meantime fetched your earlier commit A +(and started building on top of it), you can run "git push --force" to +overwrite it. In other words, "git push --force" is a method reserved for +a case where you do mean to lose history. + + +Examples +-------- + +`git push`:: + Works like `git push <remote>`, where <remote> is the + current branch's remote (or `origin`, if no remote is + configured for the current branch). + +`git push origin`:: + Without additional configuration, pushes the current branch to + the configured upstream (`remote.origin.merge` configuration + variable) if it has the same name as the current branch, and + errors out without pushing otherwise. ++ +The default behavior of this command when no <refspec> is given can be +configured by setting the `push` option of the remote, or the `push.default` +configuration variable. ++ +For example, to default to pushing only the current branch to `origin` +use `git config remote.origin.push HEAD`. Any valid <refspec> (like +the ones in the examples below) can be configured as the default for +`git push origin`. + +`git push origin :`:: + Push "matching" branches to `origin`. See + <refspec> in the <<OPTIONS,OPTIONS>> section above for a + description of "matching" branches. + +`git push origin master`:: + Find a ref that matches `master` in the source repository + (most likely, it would find `refs/heads/master`), and update + the same ref (e.g. `refs/heads/master`) in `origin` repository + with it. If `master` did not exist remotely, it would be + created. + +`git push origin HEAD`:: + A handy way to push the current branch to the same name on the + remote. + +`git push mothership master:satellite/master dev:satellite/dev`:: + Use the source ref that matches `master` (e.g. `refs/heads/master`) + to update the ref that matches `satellite/master` (most probably + `refs/remotes/satellite/master`) in the `mothership` repository; + do the same for `dev` and `satellite/dev`. ++ +This is to emulate `git fetch` run on the `mothership` using `git +push` that is run in the opposite direction in order to integrate +the work done on `satellite`, and is often necessary when you can +only make connection in one way (i.e. satellite can ssh into +mothership but mothership cannot initiate connection to satellite +because the latter is behind a firewall or does not run sshd). ++ +After running this `git push` on the `satellite` machine, you would +ssh into the `mothership` and run `git merge` there to complete the +emulation of `git pull` that were run on `mothership` to pull changes +made on `satellite`. + +`git push origin HEAD:master`:: + Push the current branch to the remote ref matching `master` in the + `origin` repository. This form is convenient to push the current + branch without thinking about its local name. + +`git push origin master:refs/heads/experimental`:: + Create the branch `experimental` in the `origin` repository + by copying the current `master` branch. This form is only + needed to create a new branch or tag in the remote repository when + the local name and the remote name are different; otherwise, + the ref name on its own will work. + +`git push origin :experimental`:: + Find a ref that matches `experimental` in the `origin` repository + (e.g. `refs/heads/experimental`), and delete it. + +`git push origin +dev:master`:: + Update the origin repository's master branch with the dev branch, + allowing non-fast-forward updates. *This can leave unreferenced + commits dangling in the origin repository.* Consider the + following situation, where a fast-forward is not possible: ++ +---- + o---o---o---A---B origin/master + \ + X---Y---Z dev +---- ++ +The above command would change the origin repository to ++ +---- + A---B (unnamed branch) + / + o---o---o---X---Y---Z master +---- ++ +Commits A and B would no longer belong to a branch with a symbolic name, +and so would be unreachable. As such, these commits would be removed by +a `git gc` command on the origin repository. + +GIT +--- +Part of the linkgit:git[1] suite diff --git a/Documentation/git-quiltimport.txt b/Documentation/git-quiltimport.txt new file mode 100644 index 0000000..ff633b0 --- /dev/null +++ b/Documentation/git-quiltimport.txt @@ -0,0 +1,61 @@ +git-quiltimport(1) +================== + +NAME +---- +git-quiltimport - Applies a quilt patchset onto the current branch + + +SYNOPSIS +-------- +[verse] +'git quiltimport' [--dry-run | -n] [--author <author>] [--patches <dir>] + [--series <file>] + + +DESCRIPTION +----------- +Applies a quilt patchset onto the current Git branch, preserving +the patch boundaries, patch order, and patch descriptions present +in the quilt patchset. + +For each patch the code attempts to extract the author from the +patch description. If that fails it falls back to the author +specified with --author. If the --author flag was not given +the patch description is displayed and the user is asked to +interactively enter the author of the patch. + +If a subject is not found in the patch description the patch name is +preserved as the 1 line subject in the Git description. + +OPTIONS +------- + +-n:: +--dry-run:: + Walk through the patches in the series and warn + if we cannot find all of the necessary information to commit + a patch. At the time of this writing only missing author + information is warned about. + +--author Author Name <Author Email>:: + The author name and email address to use when no author + information can be found in the patch description. + +--patches <dir>:: + The directory to find the quilt patches. ++ +The default for the patch directory is patches +or the value of the $QUILT_PATCHES environment +variable. + +--series <file>:: + The quilt series file. ++ +The default for the series file is <patches>/series +or the value of the $QUILT_SERIES environment +variable. + +GIT +--- +Part of the linkgit:git[1] suite diff --git a/Documentation/git-read-tree.txt b/Documentation/git-read-tree.txt new file mode 100644 index 0000000..fa1d557 --- /dev/null +++ b/Documentation/git-read-tree.txt @@ -0,0 +1,431 @@ +git-read-tree(1) +================ + +NAME +---- +git-read-tree - Reads tree information into the index + + +SYNOPSIS +-------- +[verse] +'git read-tree' [[-m [--trivial] [--aggressive] | --reset | --prefix=<prefix>] + [-u [--exclude-per-directory=<gitignore>] | -i]] + [--index-output=<file>] [--no-sparse-checkout] + (--empty | <tree-ish1> [<tree-ish2> [<tree-ish3>]]) + + +DESCRIPTION +----------- +Reads the tree information given by <tree-ish> into the index, +but does not actually *update* any of the files it "caches". (see: +linkgit:git-checkout-index[1]) + +Optionally, it can merge a tree into the index, perform a +fast-forward (i.e. 2-way) merge, or a 3-way merge, with the `-m` +flag. When used with `-m`, the `-u` flag causes it to also update +the files in the work tree with the result of the merge. + +Trivial merges are done by 'git read-tree' itself. Only conflicting paths +will be in unmerged state when 'git read-tree' returns. + +OPTIONS +------- +-m:: + Perform a merge, not just a read. The command will + refuse to run if your index file has unmerged entries, + indicating that you have not finished previous merge you + started. + +--reset:: + Same as -m, except that unmerged entries are discarded + instead of failing. + +-u:: + After a successful merge, update the files in the work + tree with the result of the merge. + +-i:: + Usually a merge requires the index file as well as the + files in the working tree to be up to date with the + current head commit, in order not to lose local + changes. This flag disables the check with the working + tree and is meant to be used when creating a merge of + trees that are not directly related to the current + working tree status into a temporary index file. + +-n:: +--dry-run:: + Check if the command would error out, without updating the index + or the files in the working tree for real. + +-v:: + Show the progress of checking files out. + +--trivial:: + Restrict three-way merge by 'git read-tree' to happen + only if there is no file-level merging required, instead + of resolving merge for trivial cases and leaving + conflicting files unresolved in the index. + +--aggressive:: + Usually a three-way merge by 'git read-tree' resolves + the merge for really trivial cases and leaves other + cases unresolved in the index, so that porcelains can + implement different merge policies. This flag makes the + command resolve a few more cases internally: ++ +* when one side removes a path and the other side leaves the path + unmodified. The resolution is to remove that path. +* when both sides remove a path. The resolution is to remove that path. +* when both sides add a path identically. The resolution + is to add that path. + +--prefix=<prefix>/:: + Keep the current index contents, and read the contents + of the named tree-ish under the directory at `<prefix>`. + The command will refuse to overwrite entries that already + existed in the original index file. Note that the `<prefix>/` + value must end with a slash. + +--exclude-per-directory=<gitignore>:: + When running the command with `-u` and `-m` options, the + merge result may need to overwrite paths that are not + tracked in the current branch. The command usually + refuses to proceed with the merge to avoid losing such a + path. However this safety valve sometimes gets in the + way. For example, it often happens that the other + branch added a file that used to be a generated file in + your branch, and the safety valve triggers when you try + to switch to that branch after you ran `make` but before + running `make clean` to remove the generated file. This + option tells the command to read per-directory exclude + file (usually '.gitignore') and allows such an untracked + but explicitly ignored file to be overwritten. + +--index-output=<file>:: + Instead of writing the results out to `$GIT_INDEX_FILE`, + write the resulting index in the named file. While the + command is operating, the original index file is locked + with the same mechanism as usual. The file must allow + to be rename(2)ed into from a temporary file that is + created next to the usual index file; typically this + means it needs to be on the same filesystem as the index + file itself, and you need write permission to the + directories the index file and index output file are + located in. + +--no-sparse-checkout:: + Disable sparse checkout support even if `core.sparseCheckout` + is true. + +--empty:: + Instead of reading tree object(s) into the index, just empty + it. + +<tree-ish#>:: + The id of the tree object(s) to be read/merged. + + +Merging +------- +If `-m` is specified, 'git read-tree' can perform 3 kinds of +merge, a single tree merge if only 1 tree is given, a +fast-forward merge with 2 trees, or a 3-way merge if 3 trees are +provided. + + +Single Tree Merge +~~~~~~~~~~~~~~~~~ +If only 1 tree is specified, 'git read-tree' operates as if the user did not +specify `-m`, except that if the original index has an entry for a +given pathname, and the contents of the path match with the tree +being read, the stat info from the index is used. (In other words, the +index's stat()s take precedence over the merged tree's). + +That means that if you do a `git read-tree -m <newtree>` followed by a +`git checkout-index -f -u -a`, the 'git checkout-index' only checks out +the stuff that really changed. + +This is used to avoid unnecessary false hits when 'git diff-files' is +run after 'git read-tree'. + + +Two Tree Merge +~~~~~~~~~~~~~~ + +Typically, this is invoked as `git read-tree -m $H $M`, where $H +is the head commit of the current repository, and $M is the head +of a foreign tree, which is simply ahead of $H (i.e. we are in a +fast-forward situation). + +When two trees are specified, the user is telling 'git read-tree' +the following: + + 1. The current index and work tree is derived from $H, but + the user may have local changes in them since $H. + + 2. The user wants to fast-forward to $M. + +In this case, the `git read-tree -m $H $M` command makes sure +that no local change is lost as the result of this "merge". +Here are the "carry forward" rules, where "I" denotes the index, +"clean" means that index and work tree coincide, and "exists"/"nothing" +refer to the presence of a path in the specified commit: + + I H M Result + ------------------------------------------------------- + 0 nothing nothing nothing (does not happen) + 1 nothing nothing exists use M + 2 nothing exists nothing remove path from index + 3 nothing exists exists, use M if "initial checkout", + H == M keep index otherwise + exists, fail + H != M + + clean I==H I==M + ------------------ + 4 yes N/A N/A nothing nothing keep index + 5 no N/A N/A nothing nothing keep index + + 6 yes N/A yes nothing exists keep index + 7 no N/A yes nothing exists keep index + 8 yes N/A no nothing exists fail + 9 no N/A no nothing exists fail + + 10 yes yes N/A exists nothing remove path from index + 11 no yes N/A exists nothing fail + 12 yes no N/A exists nothing fail + 13 no no N/A exists nothing fail + + clean (H==M) + ------ + 14 yes exists exists keep index + 15 no exists exists keep index + + clean I==H I==M (H!=M) + ------------------ + 16 yes no no exists exists fail + 17 no no no exists exists fail + 18 yes no yes exists exists keep index + 19 no no yes exists exists keep index + 20 yes yes no exists exists use M + 21 no yes no exists exists fail + +In all "keep index" cases, the index entry stays as in the +original index file. If the entry is not up to date, +'git read-tree' keeps the copy in the work tree intact when +operating under the -u flag. + +When this form of 'git read-tree' returns successfully, you can +see which of the "local changes" that you made were carried forward by running +`git diff-index --cached $M`. Note that this does not +necessarily match what `git diff-index --cached $H` would have +produced before such a two tree merge. This is because of cases +18 and 19 --- if you already had the changes in $M (e.g. maybe +you picked it up via e-mail in a patch form), `git diff-index +--cached $H` would have told you about the change before this +merge, but it would not show in `git diff-index --cached $M` +output after the two-tree merge. + +Case 3 is slightly tricky and needs explanation. The result from this +rule logically should be to remove the path if the user staged the removal +of the path and then switching to a new branch. That however will prevent +the initial checkout from happening, so the rule is modified to use M (new +tree) only when the content of the index is empty. Otherwise the removal +of the path is kept as long as $H and $M are the same. + +3-Way Merge +~~~~~~~~~~~ +Each "index" entry has two bits worth of "stage" state. stage 0 is the +normal one, and is the only one you'd see in any kind of normal use. + +However, when you do 'git read-tree' with three trees, the "stage" +starts out at 1. + +This means that you can do + +---------------- +$ git read-tree -m <tree1> <tree2> <tree3> +---------------- + +and you will end up with an index with all of the <tree1> entries in +"stage1", all of the <tree2> entries in "stage2" and all of the +<tree3> entries in "stage3". When performing a merge of another +branch into the current branch, we use the common ancestor tree +as <tree1>, the current branch head as <tree2>, and the other +branch head as <tree3>. + +Furthermore, 'git read-tree' has special-case logic that says: if you see +a file that matches in all respects in the following states, it +"collapses" back to "stage0": + + - stage 2 and 3 are the same; take one or the other (it makes no + difference - the same work has been done on our branch in + stage 2 and their branch in stage 3) + + - stage 1 and stage 2 are the same and stage 3 is different; take + stage 3 (our branch in stage 2 did not do anything since the + ancestor in stage 1 while their branch in stage 3 worked on + it) + + - stage 1 and stage 3 are the same and stage 2 is different take + stage 2 (we did something while they did nothing) + +The 'git write-tree' command refuses to write a nonsensical tree, and it +will complain about unmerged entries if it sees a single entry that is not +stage 0. + +OK, this all sounds like a collection of totally nonsensical rules, +but it's actually exactly what you want in order to do a fast +merge. The different stages represent the "result tree" (stage 0, aka +"merged"), the original tree (stage 1, aka "orig"), and the two trees +you are trying to merge (stage 2 and 3 respectively). + +The order of stages 1, 2 and 3 (hence the order of three +<tree-ish> command-line arguments) are significant when you +start a 3-way merge with an index file that is already +populated. Here is an outline of how the algorithm works: + +- if a file exists in identical format in all three trees, it will + automatically collapse to "merged" state by 'git read-tree'. + +- a file that has _any_ difference what-so-ever in the three trees + will stay as separate entries in the index. It's up to "porcelain + policy" to determine how to remove the non-0 stages, and insert a + merged version. + +- the index file saves and restores with all this information, so you + can merge things incrementally, but as long as it has entries in + stages 1/2/3 (i.e., "unmerged entries") you can't write the result. So + now the merge algorithm ends up being really simple: + + * you walk the index in order, and ignore all entries of stage 0, + since they've already been done. + + * if you find a "stage1", but no matching "stage2" or "stage3", you + know it's been removed from both trees (it only existed in the + original tree), and you remove that entry. + + * if you find a matching "stage2" and "stage3" tree, you remove one + of them, and turn the other into a "stage0" entry. Remove any + matching "stage1" entry if it exists too. .. all the normal + trivial rules .. + +You would normally use 'git merge-index' with supplied +'git merge-one-file' to do this last step. The script updates +the files in the working tree as it merges each path and at the +end of a successful merge. + +When you start a 3-way merge with an index file that is already +populated, it is assumed that it represents the state of the +files in your work tree, and you can even have files with +changes unrecorded in the index file. It is further assumed +that this state is "derived" from the stage 2 tree. The 3-way +merge refuses to run if it finds an entry in the original index +file that does not match stage 2. + +This is done to prevent you from losing your work-in-progress +changes, and mixing your random changes in an unrelated merge +commit. To illustrate, suppose you start from what has been +committed last to your repository: + +---------------- +$ JC=`git rev-parse --verify "HEAD^0"` +$ git checkout-index -f -u -a $JC +---------------- + +You do random edits, without running 'git update-index'. And then +you notice that the tip of your "upstream" tree has advanced +since you pulled from him: + +---------------- +$ git fetch git://.... linus +$ LT=`git rev-parse FETCH_HEAD` +---------------- + +Your work tree is still based on your HEAD ($JC), but you have +some edits since. Three-way merge makes sure that you have not +added or modified index entries since $JC, and if you haven't, +then does the right thing. So with the following sequence: + +---------------- +$ git read-tree -m -u `git merge-base $JC $LT` $JC $LT +$ git merge-index git-merge-one-file -a +$ echo "Merge with Linus" | \ + git commit-tree `git write-tree` -p $JC -p $LT +---------------- + +what you would commit is a pure merge between $JC and $LT without +your work-in-progress changes, and your work tree would be +updated to the result of the merge. + +However, if you have local changes in the working tree that +would be overwritten by this merge, 'git read-tree' will refuse +to run to prevent your changes from being lost. + +In other words, there is no need to worry about what exists only +in the working tree. When you have local changes in a part of +the project that is not involved in the merge, your changes do +not interfere with the merge, and are kept intact. When they +*do* interfere, the merge does not even start ('git read-tree' +complains loudly and fails without modifying anything). In such +a case, you can simply continue doing what you were in the +middle of doing, and when your working tree is ready (i.e. you +have finished your work-in-progress), attempt the merge again. + + +Sparse checkout +--------------- + +"Sparse checkout" allows populating the working directory sparsely. +It uses the skip-worktree bit (see linkgit:git-update-index[1]) to tell +Git whether a file in the working directory is worth looking at. + +'git read-tree' and other merge-based commands ('git merge', 'git +checkout'...) can help maintaining the skip-worktree bitmap and working +directory update. `$GIT_DIR/info/sparse-checkout` is used to +define the skip-worktree reference bitmap. When 'git read-tree' needs +to update the working directory, it resets the skip-worktree bit in the index +based on this file, which uses the same syntax as .gitignore files. +If an entry matches a pattern in this file, skip-worktree will not be +set on that entry. Otherwise, skip-worktree will be set. + +Then it compares the new skip-worktree value with the previous one. If +skip-worktree turns from set to unset, it will add the corresponding +file back. If it turns from unset to set, that file will be removed. + +While `$GIT_DIR/info/sparse-checkout` is usually used to specify what +files are in, you can also specify what files are _not_ in, using +negate patterns. For example, to remove the file `unwanted`: + +---------------- +/* +!unwanted +---------------- + +Another tricky thing is fully repopulating the working directory when you +no longer want sparse checkout. You cannot just disable "sparse +checkout" because skip-worktree bits are still in the index and your working +directory is still sparsely populated. You should re-populate the working +directory with the `$GIT_DIR/info/sparse-checkout` file content as +follows: + +---------------- +/* +---------------- + +Then you can disable sparse checkout. Sparse checkout support in 'git +read-tree' and similar commands is disabled by default. You need to +turn `core.sparseCheckout` on in order to have sparse checkout +support. + + +SEE ALSO +-------- +linkgit:git-write-tree[1]; linkgit:git-ls-files[1]; +linkgit:gitignore[5] + +GIT +--- +Part of the linkgit:git[1] suite diff --git a/Documentation/git-rebase.txt b/Documentation/git-rebase.txt new file mode 100644 index 0000000..6ed610a --- /dev/null +++ b/Documentation/git-rebase.txt @@ -0,0 +1,797 @@ +git-rebase(1) +============= + +NAME +---- +git-rebase - Reapply commits on top of another base tip + +SYNOPSIS +-------- +[verse] +'git rebase' [-i | --interactive] [options] [--exec <cmd>] [--onto <newbase>] + [<upstream> [<branch>]] +'git rebase' [-i | --interactive] [options] [--exec <cmd>] [--onto <newbase>] + --root [<branch>] +'git rebase' --continue | --skip | --abort | --edit-todo + +DESCRIPTION +----------- +If <branch> is specified, 'git rebase' will perform an automatic +`git checkout <branch>` before doing anything else. Otherwise +it remains on the current branch. + +If <upstream> is not specified, the upstream configured in +branch.<name>.remote and branch.<name>.merge options will be used (see +linkgit:git-config[1] for details) and the `--fork-point` option is +assumed. If you are currently not on any branch or if the current +branch does not have a configured upstream, the rebase will abort. + +All changes made by commits in the current branch but that are not +in <upstream> are saved to a temporary area. This is the same set +of commits that would be shown by `git log <upstream>..HEAD`; or by +`git log 'fork_point'..HEAD`, if `--fork-point` is active (see the +description on `--fork-point` below); or by `git log HEAD`, if the +`--root` option is specified. + +The current branch is reset to <upstream>, or <newbase> if the +--onto option was supplied. This has the exact same effect as +`git reset --hard <upstream>` (or <newbase>). ORIG_HEAD is set +to point at the tip of the branch before the reset. + +The commits that were previously saved into the temporary area are +then reapplied to the current branch, one by one, in order. Note that +any commits in HEAD which introduce the same textual changes as a commit +in HEAD..<upstream> are omitted (i.e., a patch already accepted upstream +with a different commit message or timestamp will be skipped). + +It is possible that a merge failure will prevent this process from being +completely automatic. You will have to resolve any such merge failure +and run `git rebase --continue`. Another option is to bypass the commit +that caused the merge failure with `git rebase --skip`. To check out the +original <branch> and remove the .git/rebase-apply working files, use the +command `git rebase --abort` instead. + +Assume the following history exists and the current branch is "topic": + +------------ + A---B---C topic + / + D---E---F---G master +------------ + +From this point, the result of either of the following commands: + + + git rebase master + git rebase master topic + +would be: + +------------ + A'--B'--C' topic + / + D---E---F---G master +------------ + +*NOTE:* The latter form is just a short-hand of `git checkout topic` +followed by `git rebase master`. When rebase exits `topic` will +remain the checked-out branch. + +If the upstream branch already contains a change you have made (e.g., +because you mailed a patch which was applied upstream), then that commit +will be skipped. For example, running `git rebase master` on the +following history (in which `A'` and `A` introduce the same set of changes, +but have different committer information): + +------------ + A---B---C topic + / + D---E---A'---F master +------------ + +will result in: + +------------ + B'---C' topic + / + D---E---A'---F master +------------ + +Here is how you would transplant a topic branch based on one +branch to another, to pretend that you forked the topic branch +from the latter branch, using `rebase --onto`. + +First let's assume your 'topic' is based on branch 'next'. +For example, a feature developed in 'topic' depends on some +functionality which is found in 'next'. + +------------ + o---o---o---o---o master + \ + o---o---o---o---o next + \ + o---o---o topic +------------ + +We want to make 'topic' forked from branch 'master'; for example, +because the functionality on which 'topic' depends was merged into the +more stable 'master' branch. We want our tree to look like this: + +------------ + o---o---o---o---o master + | \ + | o'--o'--o' topic + \ + o---o---o---o---o next +------------ + +We can get this using the following command: + + git rebase --onto master next topic + + +Another example of --onto option is to rebase part of a +branch. If we have the following situation: + +------------ + H---I---J topicB + / + E---F---G topicA + / + A---B---C---D master +------------ + +then the command + + git rebase --onto master topicA topicB + +would result in: + +------------ + H'--I'--J' topicB + / + | E---F---G topicA + |/ + A---B---C---D master +------------ + +This is useful when topicB does not depend on topicA. + +A range of commits could also be removed with rebase. If we have +the following situation: + +------------ + E---F---G---H---I---J topicA +------------ + +then the command + + git rebase --onto topicA~5 topicA~3 topicA + +would result in the removal of commits F and G: + +------------ + E---H'---I'---J' topicA +------------ + +This is useful if F and G were flawed in some way, or should not be +part of topicA. Note that the argument to --onto and the <upstream> +parameter can be any valid commit-ish. + +In case of conflict, 'git rebase' will stop at the first problematic commit +and leave conflict markers in the tree. You can use 'git diff' to locate +the markers (<<<<<<) and make edits to resolve the conflict. For each +file you edit, you need to tell Git that the conflict has been resolved, +typically this would be done with + + + git add <filename> + + +After resolving the conflict manually and updating the index with the +desired resolution, you can continue the rebasing process with + + + git rebase --continue + + +Alternatively, you can undo the 'git rebase' with + + + git rebase --abort + +CONFIGURATION +------------- + +rebase.stat:: + Whether to show a diffstat of what changed upstream since the last + rebase. False by default. + +rebase.autoSquash:: + If set to true enable '--autosquash' option by default. + +rebase.autoStash:: + If set to true enable '--autostash' option by default. + +rebase.missingCommitsCheck:: + If set to "warn", print warnings about removed commits in + interactive mode. If set to "error", print the warnings and + stop the rebase. If set to "ignore", no checking is + done. "ignore" by default. + +rebase.instructionFormat:: + Custom commit list format to use during an '--interactive' rebase. + +OPTIONS +------- +--onto <newbase>:: + Starting point at which to create the new commits. If the + --onto option is not specified, the starting point is + <upstream>. May be any valid commit, and not just an + existing branch name. ++ +As a special case, you may use "A\...B" as a shortcut for the +merge base of A and B if there is exactly one merge base. You can +leave out at most one of A and B, in which case it defaults to HEAD. + +<upstream>:: + Upstream branch to compare against. May be any valid commit, + not just an existing branch name. Defaults to the configured + upstream for the current branch. + +<branch>:: + Working branch; defaults to HEAD. + +--continue:: + Restart the rebasing process after having resolved a merge conflict. + +--abort:: + Abort the rebase operation and reset HEAD to the original + branch. If <branch> was provided when the rebase operation was + started, then HEAD will be reset to <branch>. Otherwise HEAD + will be reset to where it was when the rebase operation was + started. + +--keep-empty:: + Keep the commits that do not change anything from its + parents in the result. + +--skip:: + Restart the rebasing process by skipping the current patch. + +--edit-todo:: + Edit the todo list during an interactive rebase. + +-m:: +--merge:: + Use merging strategies to rebase. When the recursive (default) merge + strategy is used, this allows rebase to be aware of renames on the + upstream side. ++ +Note that a rebase merge works by replaying each commit from the working +branch on top of the <upstream> branch. Because of this, when a merge +conflict happens, the side reported as 'ours' is the so-far rebased +series, starting with <upstream>, and 'theirs' is the working branch. In +other words, the sides are swapped. + +-s <strategy>:: +--strategy=<strategy>:: + Use the given merge strategy. + If there is no `-s` option 'git merge-recursive' is used + instead. This implies --merge. ++ +Because 'git rebase' replays each commit from the working branch +on top of the <upstream> branch using the given strategy, using +the 'ours' strategy simply discards all patches from the <branch>, +which makes little sense. + +-X <strategy-option>:: +--strategy-option=<strategy-option>:: + Pass the <strategy-option> through to the merge strategy. + This implies `--merge` and, if no strategy has been + specified, `-s recursive`. Note the reversal of 'ours' and + 'theirs' as noted above for the `-m` option. + +-S[<keyid>]:: +--gpg-sign[=<keyid>]:: + GPG-sign commits. The `keyid` argument is optional and + defaults to the committer identity; if specified, it must be + stuck to the option without a space. + +-q:: +--quiet:: + Be quiet. Implies --no-stat. + +-v:: +--verbose:: + Be verbose. Implies --stat. + +--stat:: + Show a diffstat of what changed upstream since the last rebase. The + diffstat is also controlled by the configuration option rebase.stat. + +-n:: +--no-stat:: + Do not show a diffstat as part of the rebase process. + +--no-verify:: + This option bypasses the pre-rebase hook. See also linkgit:githooks[5]. + +--verify:: + Allows the pre-rebase hook to run, which is the default. This option can + be used to override --no-verify. See also linkgit:githooks[5]. + +-C<n>:: + Ensure at least <n> lines of surrounding context match before + and after each change. When fewer lines of surrounding + context exist they all must match. By default no context is + ever ignored. + +-f:: +--force-rebase:: + Force a rebase even if the current branch is up-to-date and + the command without `--force` would return without doing anything. ++ +You may find this (or --no-ff with an interactive rebase) helpful after +reverting a topic branch merge, as this option recreates the topic branch with +fresh commits so it can be remerged successfully without needing to "revert +the reversion" (see the +link:howto/revert-a-faulty-merge.html[revert-a-faulty-merge How-To] for details). + +--fork-point:: +--no-fork-point:: + Use reflog to find a better common ancestor between <upstream> + and <branch> when calculating which commits have been + introduced by <branch>. ++ +When --fork-point is active, 'fork_point' will be used instead of +<upstream> to calculate the set of commits to rebase, where +'fork_point' is the result of `git merge-base --fork-point <upstream> +<branch>` command (see linkgit:git-merge-base[1]). If 'fork_point' +ends up being empty, the <upstream> will be used as a fallback. ++ +If either <upstream> or --root is given on the command line, then the +default is `--no-fork-point`, otherwise the default is `--fork-point`. + +--ignore-whitespace:: +--whitespace=<option>:: + These flag are passed to the 'git apply' program + (see linkgit:git-apply[1]) that applies the patch. + Incompatible with the --interactive option. + +--committer-date-is-author-date:: +--ignore-date:: + These flags are passed to 'git am' to easily change the dates + of the rebased commits (see linkgit:git-am[1]). + Incompatible with the --interactive option. + +-i:: +--interactive:: + Make a list of the commits which are about to be rebased. Let the + user edit that list before rebasing. This mode can also be used to + split commits (see SPLITTING COMMITS below). ++ +The commit list format can be changed by setting the configuration option +rebase.instructionFormat. A customized instruction format will automatically +have the long commit hash prepended to the format. + +-p:: +--preserve-merges:: + Recreate merge commits instead of flattening the history by replaying + commits a merge commit introduces. Merge conflict resolutions or manual + amendments to merge commits are not preserved. ++ +This uses the `--interactive` machinery internally, but combining it +with the `--interactive` option explicitly is generally not a good +idea unless you know what you are doing (see BUGS below). + +-x <cmd>:: +--exec <cmd>:: + Append "exec <cmd>" after each line creating a commit in the + final history. <cmd> will be interpreted as one or more shell + commands. ++ +This option can only be used with the `--interactive` option +(see INTERACTIVE MODE below). ++ +You may execute several commands by either using one instance of `--exec` +with several commands: ++ + git rebase -i --exec "cmd1 && cmd2 && ..." ++ +or by giving more than one `--exec`: ++ + git rebase -i --exec "cmd1" --exec "cmd2" --exec ... ++ +If `--autosquash` is used, "exec" lines will not be appended for +the intermediate commits, and will only appear at the end of each +squash/fixup series. + +--root:: + Rebase all commits reachable from <branch>, instead of + limiting them with an <upstream>. This allows you to rebase + the root commit(s) on a branch. When used with --onto, it + will skip changes already contained in <newbase> (instead of + <upstream>) whereas without --onto it will operate on every change. + When used together with both --onto and --preserve-merges, + 'all' root commits will be rewritten to have <newbase> as parent + instead. + +--autosquash:: +--no-autosquash:: + When the commit log message begins with "squash! ..." (or + "fixup! ..."), and there is a commit whose title begins with + the same ..., automatically modify the todo list of rebase -i + so that the commit marked for squashing comes right after the + commit to be modified, and change the action of the moved + commit from `pick` to `squash` (or `fixup`). Ignores subsequent + "fixup! " or "squash! " after the first, in case you referred to an + earlier fixup/squash with `git commit --fixup/--squash`. ++ +This option is only valid when the '--interactive' option is used. ++ +If the '--autosquash' option is enabled by default using the +configuration variable `rebase.autoSquash`, this option can be +used to override and disable this setting. + +--autostash:: +--no-autostash:: + Automatically create a temporary stash before the operation + begins, and apply it after the operation ends. This means + that you can run rebase on a dirty worktree. However, use + with care: the final stash application after a successful + rebase might result in non-trivial conflicts. + +--no-ff:: + With --interactive, cherry-pick all rebased commits instead of + fast-forwarding over the unchanged ones. This ensures that the + entire history of the rebased branch is composed of new commits. ++ +Without --interactive, this is a synonym for --force-rebase. ++ +You may find this helpful after reverting a topic branch merge, as this option +recreates the topic branch with fresh commits so it can be remerged +successfully without needing to "revert the reversion" (see the +link:howto/revert-a-faulty-merge.html[revert-a-faulty-merge How-To] for details). + +include::merge-strategies.txt[] + +NOTES +----- + +You should understand the implications of using 'git rebase' on a +repository that you share. See also RECOVERING FROM UPSTREAM REBASE +below. + +When the git-rebase command is run, it will first execute a "pre-rebase" +hook if one exists. You can use this hook to do sanity checks and +reject the rebase if it isn't appropriate. Please see the template +pre-rebase hook script for an example. + +Upon completion, <branch> will be the current branch. + +INTERACTIVE MODE +---------------- + +Rebasing interactively means that you have a chance to edit the commits +which are rebased. You can reorder the commits, and you can +remove them (weeding out bad or otherwise unwanted patches). + +The interactive mode is meant for this type of workflow: + +1. have a wonderful idea +2. hack on the code +3. prepare a series for submission +4. submit + +where point 2. consists of several instances of + +a) regular use + + 1. finish something worthy of a commit + 2. commit + +b) independent fixup + + 1. realize that something does not work + 2. fix that + 3. commit it + +Sometimes the thing fixed in b.2. cannot be amended to the not-quite +perfect commit it fixes, because that commit is buried deeply in a +patch series. That is exactly what interactive rebase is for: use it +after plenty of "a"s and "b"s, by rearranging and editing +commits, and squashing multiple commits into one. + +Start it with the last commit you want to retain as-is: + + git rebase -i <after-this-commit> + +An editor will be fired up with all the commits in your current branch +(ignoring merge commits), which come after the given commit. You can +reorder the commits in this list to your heart's content, and you can +remove them. The list looks more or less like this: + +------------------------------------------- +pick deadbee The oneline of this commit +pick fa1afe1 The oneline of the next commit +... +------------------------------------------- + +The oneline descriptions are purely for your pleasure; 'git rebase' will +not look at them but at the commit names ("deadbee" and "fa1afe1" in this +example), so do not delete or edit the names. + +By replacing the command "pick" with the command "edit", you can tell +'git rebase' to stop after applying that commit, so that you can edit +the files and/or the commit message, amend the commit, and continue +rebasing. + +If you just want to edit the commit message for a commit, replace the +command "pick" with the command "reword". + +To drop a commit, replace the command "pick" with "drop", or just +delete the matching line. + +If you want to fold two or more commits into one, replace the command +"pick" for the second and subsequent commits with "squash" or "fixup". +If the commits had different authors, the folded commit will be +attributed to the author of the first commit. The suggested commit +message for the folded commit is the concatenation of the commit +messages of the first commit and of those with the "squash" command, +but omits the commit messages of commits with the "fixup" command. + +'git rebase' will stop when "pick" has been replaced with "edit" or +when a command fails due to merge errors. When you are done editing +and/or resolving conflicts you can continue with `git rebase --continue`. + +For example, if you want to reorder the last 5 commits, such that what +was HEAD~4 becomes the new HEAD. To achieve that, you would call +'git rebase' like this: + +---------------------- +$ git rebase -i HEAD~5 +---------------------- + +And move the first patch to the end of the list. + +You might want to preserve merges, if you have a history like this: + +------------------ + X + \ + A---M---B + / +---o---O---P---Q +------------------ + +Suppose you want to rebase the side branch starting at "A" to "Q". Make +sure that the current HEAD is "B", and call + +----------------------------- +$ git rebase -i -p --onto Q O +----------------------------- + +Reordering and editing commits usually creates untested intermediate +steps. You may want to check that your history editing did not break +anything by running a test, or at least recompiling at intermediate +points in history by using the "exec" command (shortcut "x"). You may +do so by creating a todo list like this one: + +------------------------------------------- +pick deadbee Implement feature XXX +fixup f1a5c00 Fix to feature XXX +exec make +pick c0ffeee The oneline of the next commit +edit deadbab The oneline of the commit after +exec cd subdir; make test +... +------------------------------------------- + +The interactive rebase will stop when a command fails (i.e. exits with +non-0 status) to give you an opportunity to fix the problem. You can +continue with `git rebase --continue`. + +The "exec" command launches the command in a shell (the one specified +in `$SHELL`, or the default shell if `$SHELL` is not set), so you can +use shell features (like "cd", ">", ";" ...). The command is run from +the root of the working tree. + +---------------------------------- +$ git rebase -i --exec "make test" +---------------------------------- + +This command lets you check that intermediate commits are compilable. +The todo list becomes like that: + +-------------------- +pick 5928aea one +exec make test +pick 04d0fda two +exec make test +pick ba46169 three +exec make test +pick f4593f9 four +exec make test +-------------------- + +SPLITTING COMMITS +----------------- + +In interactive mode, you can mark commits with the action "edit". However, +this does not necessarily mean that 'git rebase' expects the result of this +edit to be exactly one commit. Indeed, you can undo the commit, or you can +add other commits. This can be used to split a commit into two: + +- Start an interactive rebase with `git rebase -i <commit>^`, where + <commit> is the commit you want to split. In fact, any commit range + will do, as long as it contains that commit. + +- Mark the commit you want to split with the action "edit". + +- When it comes to editing that commit, execute `git reset HEAD^`. The + effect is that the HEAD is rewound by one, and the index follows suit. + However, the working tree stays the same. + +- Now add the changes to the index that you want to have in the first + commit. You can use `git add` (possibly interactively) or + 'git gui' (or both) to do that. + +- Commit the now-current index with whatever commit message is appropriate + now. + +- Repeat the last two steps until your working tree is clean. + +- Continue the rebase with `git rebase --continue`. + +If you are not absolutely sure that the intermediate revisions are +consistent (they compile, pass the testsuite, etc.) you should use +'git stash' to stash away the not-yet-committed changes +after each commit, test, and amend the commit if fixes are necessary. + + +RECOVERING FROM UPSTREAM REBASE +------------------------------- + +Rebasing (or any other form of rewriting) a branch that others have +based work on is a bad idea: anyone downstream of it is forced to +manually fix their history. This section explains how to do the fix +from the downstream's point of view. The real fix, however, would be +to avoid rebasing the upstream in the first place. + +To illustrate, suppose you are in a situation where someone develops a +'subsystem' branch, and you are working on a 'topic' that is dependent +on this 'subsystem'. You might end up with a history like the +following: + +------------ + o---o---o---o---o---o---o---o---o master + \ + o---o---o---o---o subsystem + \ + *---*---* topic +------------ + +If 'subsystem' is rebased against 'master', the following happens: + +------------ + o---o---o---o---o---o---o---o master + \ \ + o---o---o---o---o o'--o'--o'--o'--o' subsystem + \ + *---*---* topic +------------ + +If you now continue development as usual, and eventually merge 'topic' +to 'subsystem', the commits from 'subsystem' will remain duplicated forever: + +------------ + o---o---o---o---o---o---o---o master + \ \ + o---o---o---o---o o'--o'--o'--o'--o'--M subsystem + \ / + *---*---*-..........-*--* topic +------------ + +Such duplicates are generally frowned upon because they clutter up +history, making it harder to follow. To clean things up, you need to +transplant the commits on 'topic' to the new 'subsystem' tip, i.e., +rebase 'topic'. This becomes a ripple effect: anyone downstream from +'topic' is forced to rebase too, and so on! + +There are two kinds of fixes, discussed in the following subsections: + +Easy case: The changes are literally the same.:: + + This happens if the 'subsystem' rebase was a simple rebase and + had no conflicts. + +Hard case: The changes are not the same.:: + + This happens if the 'subsystem' rebase had conflicts, or used + `--interactive` to omit, edit, squash, or fixup commits; or + if the upstream used one of `commit --amend`, `reset`, or + `filter-branch`. + + +The easy case +~~~~~~~~~~~~~ + +Only works if the changes (patch IDs based on the diff contents) on +'subsystem' are literally the same before and after the rebase +'subsystem' did. + +In that case, the fix is easy because 'git rebase' knows to skip +changes that are already present in the new upstream. So if you say +(assuming you're on 'topic') +------------ + $ git rebase subsystem +------------ +you will end up with the fixed history +------------ + o---o---o---o---o---o---o---o master + \ + o'--o'--o'--o'--o' subsystem + \ + *---*---* topic +------------ + + +The hard case +~~~~~~~~~~~~~ + +Things get more complicated if the 'subsystem' changes do not exactly +correspond to the ones before the rebase. + +NOTE: While an "easy case recovery" sometimes appears to be successful + even in the hard case, it may have unintended consequences. For + example, a commit that was removed via `git rebase + --interactive` will be **resurrected**! + +The idea is to manually tell 'git rebase' "where the old 'subsystem' +ended and your 'topic' began", that is, what the old merge-base +between them was. You will have to find a way to name the last commit +of the old 'subsystem', for example: + +* With the 'subsystem' reflog: after 'git fetch', the old tip of + 'subsystem' is at `subsystem@{1}`. Subsequent fetches will + increase the number. (See linkgit:git-reflog[1].) + +* Relative to the tip of 'topic': knowing that your 'topic' has three + commits, the old tip of 'subsystem' must be `topic~3`. + +You can then transplant the old `subsystem..topic` to the new tip by +saying (for the reflog case, and assuming you are on 'topic' already): +------------ + $ git rebase --onto subsystem subsystem@{1} +------------ + +The ripple effect of a "hard case" recovery is especially bad: +'everyone' downstream from 'topic' will now have to perform a "hard +case" recovery too! + +BUGS +---- +The todo list presented by `--preserve-merges --interactive` does not +represent the topology of the revision graph. Editing commits and +rewording their commit messages should work fine, but attempts to +reorder commits tend to produce counterintuitive results. + +For example, an attempt to rearrange +------------ +1 --- 2 --- 3 --- 4 --- 5 +------------ +to +------------ +1 --- 2 --- 4 --- 3 --- 5 +------------ +by moving the "pick 4" line will result in the following history: +------------ + 3 + / +1 --- 2 --- 4 --- 5 +------------ + +GIT +--- +Part of the linkgit:git[1] suite diff --git a/Documentation/git-receive-pack.txt b/Documentation/git-receive-pack.txt new file mode 100644 index 0000000..000ee8d --- /dev/null +++ b/Documentation/git-receive-pack.txt @@ -0,0 +1,220 @@ +git-receive-pack(1) +=================== + +NAME +---- +git-receive-pack - Receive what is pushed into the repository + + +SYNOPSIS +-------- +[verse] +'git-receive-pack' <directory> + +DESCRIPTION +----------- +Invoked by 'git send-pack' and updates the repository with the +information fed from the remote end. + +This command is usually not invoked directly by the end user. +The UI for the protocol is on the 'git send-pack' side, and the +program pair is meant to be used to push updates to remote +repository. For pull operations, see linkgit:git-fetch-pack[1]. + +The command allows for creation and fast-forwarding of sha1 refs +(heads/tags) on the remote end (strictly speaking, it is the +local end 'git-receive-pack' runs, but to the user who is sitting at +the send-pack end, it is updating the remote. Confused?) + +There are other real-world examples of using update and +post-update hooks found in the Documentation/howto directory. + +'git-receive-pack' honours the receive.denyNonFastForwards config +option, which tells it if updates to a ref should be denied if they +are not fast-forwards. + +OPTIONS +------- +<directory>:: + The repository to sync into. + +pre-receive Hook +---------------- +Before any ref is updated, if $GIT_DIR/hooks/pre-receive file exists +and is executable, it will be invoked once with no parameters. The +standard input of the hook will be one line per ref to be updated: + + sha1-old SP sha1-new SP refname LF + +The refname value is relative to $GIT_DIR; e.g. for the master +head this is "refs/heads/master". The two sha1 values before +each refname are the object names for the refname before and after +the update. Refs to be created will have sha1-old equal to 0\{40}, +while refs to be deleted will have sha1-new equal to 0\{40}, otherwise +sha1-old and sha1-new should be valid objects in the repository. + +When accepting a signed push (see linkgit:git-push[1]), the signed +push certificate is stored in a blob and an environment variable +`GIT_PUSH_CERT` can be consulted for its object name. See the +description of `post-receive` hook for an example. In addition, the +certificate is verified using GPG and the result is exported with +the following environment variables: + +`GIT_PUSH_CERT_SIGNER`:: + The name and the e-mail address of the owner of the key that + signed the push certificate. + +`GIT_PUSH_CERT_KEY`:: + The GPG key ID of the key that signed the push certificate. + +`GIT_PUSH_CERT_STATUS`:: + The status of GPG verification of the push certificate, + using the same mnemonic as used in `%G?` format of `git log` + family of commands (see linkgit:git-log[1]). + +`GIT_PUSH_CERT_NONCE`:: + The nonce string the process asked the signer to include + in the push certificate. If this does not match the value + recorded on the "nonce" header in the push certificate, it + may indicate that the certificate is a valid one that is + being replayed from a separate "git push" session. + +`GIT_PUSH_CERT_NONCE_STATUS`:: +`UNSOLICITED`;; + "git push --signed" sent a nonce when we did not ask it to + send one. +`MISSING`;; + "git push --signed" did not send any nonce header. +`BAD`;; + "git push --signed" sent a bogus nonce. +`OK`;; + "git push --signed" sent the nonce we asked it to send. +`SLOP`;; + "git push --signed" sent a nonce different from what we + asked it to send now, but in a previous session. See + `GIT_PUSH_CERT_NONCE_SLOP` environment variable. + +`GIT_PUSH_CERT_NONCE_SLOP`:: + "git push --signed" sent a nonce different from what we + asked it to send now, but in a different session whose + starting time is different by this many seconds from the + current session. Only meaningful when + `GIT_PUSH_CERT_NONCE_STATUS` says `SLOP`. + Also read about `receive.certNonceSlop` variable in + linkgit:git-config[1]. + +This hook is called before any refname is updated and before any +fast-forward checks are performed. + +If the pre-receive hook exits with a non-zero exit status no updates +will be performed, and the update, post-receive and post-update +hooks will not be invoked either. This can be useful to quickly +bail out if the update is not to be supported. + +update Hook +----------- +Before each ref is updated, if $GIT_DIR/hooks/update file exists +and is executable, it is invoked once per ref, with three parameters: + + $GIT_DIR/hooks/update refname sha1-old sha1-new + +The refname parameter is relative to $GIT_DIR; e.g. for the master +head this is "refs/heads/master". The two sha1 arguments are +the object names for the refname before and after the update. +Note that the hook is called before the refname is updated, +so either sha1-old is 0\{40} (meaning there is no such ref yet), +or it should match what is recorded in refname. + +The hook should exit with non-zero status if it wants to disallow +updating the named ref. Otherwise it should exit with zero. + +Successful execution (a zero exit status) of this hook does not +ensure the ref will actually be updated, it is only a prerequisite. +As such it is not a good idea to send notices (e.g. email) from +this hook. Consider using the post-receive hook instead. + +post-receive Hook +----------------- +After all refs were updated (or attempted to be updated), if any +ref update was successful, and if $GIT_DIR/hooks/post-receive +file exists and is executable, it will be invoked once with no +parameters. The standard input of the hook will be one line +for each successfully updated ref: + + sha1-old SP sha1-new SP refname LF + +The refname value is relative to $GIT_DIR; e.g. for the master +head this is "refs/heads/master". The two sha1 values before +each refname are the object names for the refname before and after +the update. Refs that were created will have sha1-old equal to +0\{40}, while refs that were deleted will have sha1-new equal to +0\{40}, otherwise sha1-old and sha1-new should be valid objects in +the repository. + +The `GIT_PUSH_CERT*` environment variables can be inspected, just as +in `pre-receive` hook, after accepting a signed push. + +Using this hook, it is easy to generate mails describing the updates +to the repository. This example script sends one mail message per +ref listing the commits pushed to the repository, and logs the push +certificates of signed pushes with good signatures to a logger +service: + + #!/bin/sh + # mail out commit update information. + while read oval nval ref + do + if expr "$oval" : '0*$' >/dev/null + then + echo "Created a new ref, with the following commits:" + git rev-list --pretty "$nval" + else + echo "New commits:" + git rev-list --pretty "$nval" "^$oval" + fi | + mail -s "Changes to ref $ref" commit-list@mydomain + done + # log signed push certificate, if any + if test -n "${GIT_PUSH_CERT-}" && test ${GIT_PUSH_CERT_STATUS} = G + then + ( + echo expected nonce is ${GIT_PUSH_NONCE} + git cat-file blob ${GIT_PUSH_CERT} + ) | mail -s "push certificate from $GIT_PUSH_CERT_SIGNER" push-log@mydomain + fi + exit 0 + +The exit code from this hook invocation is ignored, however a +non-zero exit code will generate an error message. + +Note that it is possible for refname to not have sha1-new when this +hook runs. This can easily occur if another user modifies the ref +after it was updated by 'git-receive-pack', but before the hook was able +to evaluate it. It is recommended that hooks rely on sha1-new +rather than the current value of refname. + +post-update Hook +---------------- +After all other processing, if at least one ref was updated, and +if $GIT_DIR/hooks/post-update file exists and is executable, then +post-update will be called with the list of refs that have been updated. +This can be used to implement any repository wide cleanup tasks. + +The exit code from this hook invocation is ignored; the only thing +left for 'git-receive-pack' to do at that point is to exit itself +anyway. + +This hook can be used, for example, to run `git update-server-info` +if the repository is packed and is served via a dumb transport. + + #!/bin/sh + exec git update-server-info + + +SEE ALSO +-------- +linkgit:git-send-pack[1], linkgit:gitnamespaces[7] + +GIT +--- +Part of the linkgit:git[1] suite diff --git a/Documentation/git-reflog.txt b/Documentation/git-reflog.txt new file mode 100644 index 0000000..44c736f --- /dev/null +++ b/Documentation/git-reflog.txt @@ -0,0 +1,133 @@ +git-reflog(1) +============= + +NAME +---- +git-reflog - Manage reflog information + + +SYNOPSIS +-------- +[verse] +'git reflog' <subcommand> <options> + +DESCRIPTION +----------- +The command takes various subcommands, and different options +depending on the subcommand: + +[verse] +'git reflog' ['show'] [log-options] [<ref>] +'git reflog expire' [--expire=<time>] [--expire-unreachable=<time>] + [--rewrite] [--updateref] [--stale-fix] + [--dry-run] [--verbose] [--all | <refs>...] +'git reflog delete' [--rewrite] [--updateref] + [--dry-run] [--verbose] ref@\{specifier\}... +'git reflog exists' <ref> + +Reference logs, or "reflogs", record when the tips of branches and +other references were updated in the local repository. Reflogs are +useful in various Git commands, to specify the old value of a +reference. For example, `HEAD@{2}` means "where HEAD used to be two +moves ago", `master@{one.week.ago}` means "where master used to point +to one week ago in this local repository", and so on. See +linkgit:gitrevisions[7] for more details. + +This command manages the information recorded in the reflogs. + +The "show" subcommand (which is also the default, in the absence of +any subcommands) shows the log of the reference provided in the +command-line (or `HEAD`, by default). The reflog covers all recent +actions, and in addition the `HEAD` reflog records branch switching. +`git reflog show` is an alias for `git log -g --abbrev-commit +--pretty=oneline`; see linkgit:git-log[1] for more information. + +The "expire" subcommand prunes older reflog entries. Entries older +than `expire` time, or entries older than `expire-unreachable` time +and not reachable from the current tip, are removed from the reflog. +This is typically not used directly by end users -- instead, see +linkgit:git-gc[1]. + +The "delete" subcommand deletes single entries from the reflog. Its +argument must be an _exact_ entry (e.g. "`git reflog delete +master@{2}`"). This subcommand is also typically not used directly by +end users. + +The "exists" subcommand checks whether a ref has a reflog. It exits +with zero status if the reflog exists, and non-zero status if it does +not. + +OPTIONS +------- + +Options for `show` +~~~~~~~~~~~~~~~~~~ + +`git reflog show` accepts any of the options accepted by `git log`. + + +Options for `expire` +~~~~~~~~~~~~~~~~~~~~ + +--all:: + Process the reflogs of all references. + +--expire=<time>:: + Prune entries older than the specified time. If this option is + not specified, the expiration time is taken from the + configuration setting `gc.reflogExpire`, which in turn + defaults to 90 days. `--expire=all` prunes entries regardless + of their age; `--expire=never` turns off pruning of reachable + entries (but see `--expire-unreachable`). + +--expire-unreachable=<time>:: + Prune entries older than `<time>` that are not reachable from + the current tip of the branch. If this option is not + specified, the expiration time is taken from the configuration + setting `gc.reflogExpireUnreachable`, which in turn defaults + to 30 days. `--expire-unreachable=all` prunes unreachable + entries regardless of their age; `--expire-unreachable=never` + turns off early pruning of unreachable entries (but see + `--expire`). + +--updateref:: + Update the reference to the value of the top reflog entry (i.e. + <ref>@\{0\}) if the previous top entry was pruned. (This + option is ignored for symbolic references.) + +--rewrite:: + If a reflog entry's predecessor is pruned, adjust its "old" + SHA-1 to be equal to the "new" SHA-1 field of the entry that + now precedes it. + +--stale-fix:: + Prune any reflog entries that point to "broken commits". A + broken commit is a commit that is not reachable from any of + the reference tips and that refers, directly or indirectly, to + a missing commit, tree, or blob object. ++ +This computation involves traversing all the reachable objects, i.e. it +has the same cost as 'git prune'. It is primarily intended to fix +corruption caused by garbage collecting using older versions of Git, +which didn't protect objects referred to by reflogs. + +-n:: +--dry-run:: + Do not actually prune any entries; just show what would have + been pruned. + +--verbose:: + Print extra information on screen. + + +Options for `delete` +~~~~~~~~~~~~~~~~~~~~ + +`git reflog delete` accepts options `--updateref`, `--rewrite`, `-n`, +`--dry-run`, and `--verbose`, with the same meanings as when they are +used with `expire`. + + +GIT +--- +Part of the linkgit:git[1] suite diff --git a/Documentation/git-relink.txt b/Documentation/git-relink.txt new file mode 100644 index 0000000..3b33c99 --- /dev/null +++ b/Documentation/git-relink.txt @@ -0,0 +1,30 @@ +git-relink(1) +============= + +NAME +---- +git-relink - Hardlink common objects in local repositories + +SYNOPSIS +-------- +[verse] +'git relink' [--safe] <dir>... <master_dir> + +DESCRIPTION +----------- +This will scan 1 or more object repositories and look for objects in common +with a master repository. Objects not already hardlinked to the master +repository will be replaced with a hardlink to the master repository. + +OPTIONS +------- +--safe:: + Stops if two objects with the same hash exist but have different sizes. + Default is to warn and continue. + +<dir>:: + Directories containing a .git/objects/ subdirectory. + +GIT +--- +Part of the linkgit:git[1] suite diff --git a/Documentation/git-remote-ext.txt b/Documentation/git-remote-ext.txt new file mode 100644 index 0000000..b25d0b5 --- /dev/null +++ b/Documentation/git-remote-ext.txt @@ -0,0 +1,125 @@ +git-remote-ext(1) +================= + +NAME +---- +git-remote-ext - Bridge smart transport to external command. + +SYNOPSIS +-------- +[verse] +git remote add <nick> "ext::<command>[ <arguments>...]" + +DESCRIPTION +----------- +This remote helper uses the specified '<command>' to connect +to a remote Git server. + +Data written to stdin of the specified '<command>' is assumed +to be sent to a git:// server, git-upload-pack, git-receive-pack +or git-upload-archive (depending on situation), and data read +from stdout of <command> is assumed to be received from +the same service. + +Command and arguments are separated by an unescaped space. + +The following sequences have a special meaning: + +'% ':: + Literal space in command or argument. + +'%%':: + Literal percent sign. + +'%s':: + Replaced with name (receive-pack, upload-pack, or + upload-archive) of the service Git wants to invoke. + +'%S':: + Replaced with long name (git-receive-pack, + git-upload-pack, or git-upload-archive) of the service + Git wants to invoke. + +'%G' (must be the first characters in an argument):: + This argument will not be passed to '<command>'. Instead, it + will cause the helper to start by sending git:// service requests to + the remote side with the service field set to an appropriate value and + the repository field set to rest of the argument. Default is not to send + such a request. ++ +This is useful if remote side is git:// server accessed over +some tunnel. + +'%V' (must be first characters in argument):: + This argument will not be passed to '<command>'. Instead it sets + the vhost field in the git:// service request (to rest of the argument). + Default is not to send vhost in such request (if sent). + +ENVIRONMENT VARIABLES: +---------------------- + +GIT_TRANSLOOP_DEBUG:: + If set, prints debugging information about various reads/writes. + +ENVIRONMENT VARIABLES PASSED TO COMMAND: +---------------------------------------- + +GIT_EXT_SERVICE:: + Set to long name (git-upload-pack, etc...) of service helper needs + to invoke. + +GIT_EXT_SERVICE_NOPREFIX:: + Set to long name (upload-pack, etc...) of service helper needs + to invoke. + + +EXAMPLES: +--------- +This remote helper is transparently used by Git when +you use commands such as "git fetch <URL>", "git clone <URL>", +, "git push <URL>" or "git remote add <nick> <URL>", where <URL> +begins with `ext::`. Examples: + +"ext::ssh -i /home/foo/.ssh/somekey user@host.example %S 'foo/repo'":: + Like host.example:foo/repo, but use /home/foo/.ssh/somekey as + keypair and user as user on remote side. This avoids needing to + edit .ssh/config. + +"ext::socat -t3600 - ABSTRACT-CONNECT:/git-server %G/somerepo":: + Represents repository with path /somerepo accessible over + git protocol at abstract namespace address /git-server. + +"ext::git-server-alias foo %G/repo":: + Represents a repository with path /repo accessed using the + helper program "git-server-alias foo". The path to the + repository and type of request are not passed on the command + line but as part of the protocol stream, as usual with git:// + protocol. + +"ext::git-server-alias foo %G/repo %Vfoo":: + Represents a repository with path /repo accessed using the + helper program "git-server-alias foo". The hostname for the + remote server passed in the protocol stream will be "foo" + (this allows multiple virtual Git servers to share a + link-level address). + +"ext::git-server-alias foo %G/repo% with% spaces %Vfoo":: + Represents a repository with path '/repo with spaces' accessed + using the helper program "git-server-alias foo". The hostname for + the remote server passed in the protocol stream will be "foo" + (this allows multiple virtual Git servers to share a + link-level address). + +"ext::git-ssl foo.example /bar":: + Represents a repository accessed using the helper program + "git-ssl foo.example /bar". The type of request can be + determined by the helper using environment variables (see + above). + +SEE ALSO +-------- +linkgit:gitremote-helpers[1] + +GIT +--- +Part of the linkgit:git[1] suite diff --git a/Documentation/git-remote-fd.txt b/Documentation/git-remote-fd.txt new file mode 100644 index 0000000..e700baf --- /dev/null +++ b/Documentation/git-remote-fd.txt @@ -0,0 +1,59 @@ +git-remote-fd(1) +================ + +NAME +---- +git-remote-fd - Reflect smart transport stream back to caller + +SYNOPSIS +-------- +"fd::<infd>[,<outfd>][/<anything>]" (as URL) + +DESCRIPTION +----------- +This helper uses specified file descriptors to connect to a remote Git server. +This is not meant for end users but for programs and scripts calling git +fetch, push or archive. + +If only <infd> is given, it is assumed to be a bidirectional socket connected +to remote Git server (git-upload-pack, git-receive-pack or +git-upload-achive). If both <infd> and <outfd> are given, they are assumed +to be pipes connected to a remote Git server (<infd> being the inbound pipe +and <outfd> being the outbound pipe. + +It is assumed that any handshaking procedures have already been completed +(such as sending service request for git://) before this helper is started. + +<anything> can be any string. It is ignored. It is meant for providing +information to user in the URL in case that URL is displayed in some +context. + +ENVIRONMENT VARIABLES +--------------------- +GIT_TRANSLOOP_DEBUG:: + If set, prints debugging information about various reads/writes. + +EXAMPLES +-------- +`git fetch fd::17 master`:: + Fetch master, using file descriptor #17 to communicate with + git-upload-pack. + +`git fetch fd::17/foo master`:: + Same as above. + +`git push fd::7,8 master (as URL)`:: + Push master, using file descriptor #7 to read data from + git-receive-pack and file descriptor #8 to write data to + same service. + +`git push fd::7,8/bar master`:: + Same as above. + +SEE ALSO +-------- +linkgit:gitremote-helpers[1] + +GIT +--- +Part of the linkgit:git[1] suite diff --git a/Documentation/git-remote-helpers.txto b/Documentation/git-remote-helpers.txto new file mode 100644 index 0000000..49233f5 --- /dev/null +++ b/Documentation/git-remote-helpers.txto @@ -0,0 +1,9 @@ +git-remote-helpers +================== + +This document has been moved to linkgit:gitremote-helpers[1]. + +Please let the owners of the referring site know so that they can update the +link you clicked to get here. + +Thanks. diff --git a/Documentation/git-remote-testgit.txt b/Documentation/git-remote-testgit.txt new file mode 100644 index 0000000..f791d73 --- /dev/null +++ b/Documentation/git-remote-testgit.txt @@ -0,0 +1,30 @@ +git-remote-testgit(1) +===================== + +NAME +---- +git-remote-testgit - Example remote-helper + + +SYNOPSIS +-------- +[verse] +git clone testgit::<source-repo> [<destination>] + +DESCRIPTION +----------- + +This command is a simple remote-helper, that is used both as a +testcase for the remote-helper functionality, and as an example to +show remote-helper authors one possible implementation. + +The best way to learn more is to read the comments and source code in +'git-remote-testgit'. + +SEE ALSO +-------- +linkgit:gitremote-helpers[1] + +GIT +--- +Part of the linkgit:git[1] suite diff --git a/Documentation/git-remote.txt b/Documentation/git-remote.txt new file mode 100644 index 0000000..1d7ecea --- /dev/null +++ b/Documentation/git-remote.txt @@ -0,0 +1,252 @@ +git-remote(1) +============= + +NAME +---- +git-remote - Manage set of tracked repositories + + +SYNOPSIS +-------- +[verse] +'git remote' [-v | --verbose] +'git remote add' [-t <branch>] [-m <master>] [-f] [--[no-]tags] [--mirror=<fetch|push>] <name> <url> +'git remote rename' <old> <new> +'git remote remove' <name> +'git remote set-head' <name> (-a | --auto | -d | --delete | <branch>) +'git remote set-branches' [--add] <name> <branch>... +'git remote get-url' [--push] [--all] <name> +'git remote set-url' [--push] <name> <newurl> [<oldurl>] +'git remote set-url --add' [--push] <name> <newurl> +'git remote set-url --delete' [--push] <name> <url> +'git remote' [-v | --verbose] 'show' [-n] <name>... +'git remote prune' [-n | --dry-run] <name>... +'git remote' [-v | --verbose] 'update' [-p | --prune] [(<group> | <remote>)...] + +DESCRIPTION +----------- + +Manage the set of repositories ("remotes") whose branches you track. + + +OPTIONS +------- + +-v:: +--verbose:: + Be a little more verbose and show remote url after name. + NOTE: This must be placed between `remote` and `subcommand`. + + +COMMANDS +-------- + +With no arguments, shows a list of existing remotes. Several +subcommands are available to perform operations on the remotes. + +'add':: + +Adds a remote named <name> for the repository at +<url>. The command `git fetch <name>` can then be used to create and +update remote-tracking branches <name>/<branch>. ++ +With `-f` option, `git fetch <name>` is run immediately after +the remote information is set up. ++ +With `--tags` option, `git fetch <name>` imports every tag from the +remote repository. ++ +With `--no-tags` option, `git fetch <name>` does not import tags from +the remote repository. ++ +By default, only tags on fetched branches are imported +(see linkgit:git-fetch[1]). ++ +With `-t <branch>` option, instead of the default glob +refspec for the remote to track all branches under +the `refs/remotes/<name>/` namespace, a refspec to track only `<branch>` +is created. You can give more than one `-t <branch>` to track +multiple branches without grabbing all branches. ++ +With `-m <master>` option, a symbolic-ref `refs/remotes/<name>/HEAD` is set +up to point at remote's `<master>` branch. See also the set-head command. ++ +When a fetch mirror is created with `--mirror=fetch`, the refs will not +be stored in the 'refs/remotes/' namespace, but rather everything in +'refs/' on the remote will be directly mirrored into 'refs/' in the +local repository. This option only makes sense in bare repositories, +because a fetch would overwrite any local commits. ++ +When a push mirror is created with `--mirror=push`, then `git push` +will always behave as if `--mirror` was passed. + +'rename':: + +Rename the remote named <old> to <new>. All remote-tracking branches and +configuration settings for the remote are updated. ++ +In case <old> and <new> are the same, and <old> is a file under +`$GIT_DIR/remotes` or `$GIT_DIR/branches`, the remote is converted to +the configuration file format. + +'remove':: +'rm':: + +Remove the remote named <name>. All remote-tracking branches and +configuration settings for the remote are removed. + +'set-head':: + +Sets or deletes the default branch (i.e. the target of the +symbolic-ref `refs/remotes/<name>/HEAD`) for +the named remote. Having a default branch for a remote is not required, +but allows the name of the remote to be specified in lieu of a specific +branch. For example, if the default branch for `origin` is set to +`master`, then `origin` may be specified wherever you would normally +specify `origin/master`. ++ +With `-d` or `--delete`, the symbolic ref `refs/remotes/<name>/HEAD` is deleted. ++ +With `-a` or `--auto`, the remote is queried to determine its `HEAD`, then the +symbolic-ref `refs/remotes/<name>/HEAD` is set to the same branch. e.g., if the remote +`HEAD` is pointed at `next`, "`git remote set-head origin -a`" will set +the symbolic-ref `refs/remotes/origin/HEAD` to `refs/remotes/origin/next`. This will +only work if `refs/remotes/origin/next` already exists; if not it must be +fetched first. ++ +Use `<branch>` to set the symbolic-ref `refs/remotes/<name>/HEAD` explicitly. e.g., "git +remote set-head origin master" will set the symbolic-ref `refs/remotes/origin/HEAD` to +`refs/remotes/origin/master`. This will only work if +`refs/remotes/origin/master` already exists; if not it must be fetched first. ++ + +'set-branches':: + +Changes the list of branches tracked by the named remote. +This can be used to track a subset of the available remote branches +after the initial setup for a remote. ++ +The named branches will be interpreted as if specified with the +`-t` option on the 'git remote add' command line. ++ +With `--add`, instead of replacing the list of currently tracked +branches, adds to that list. + +'get-url':: + +Retrieves the URLs for a remote. Configurations for `insteadOf` and +`pushInsteadOf` are expanded here. By default, only the first URL is listed. ++ +With '--push', push URLs are queried rather than fetch URLs. ++ +With '--all', all URLs for the remote will be listed. + +'set-url':: + +Changes URLs for the remote. Sets first URL for remote <name> that matches +regex <oldurl> (first URL if no <oldurl> is given) to <newurl>. If +<oldurl> doesn't match any URL, an error occurs and nothing is changed. ++ +With '--push', push URLs are manipulated instead of fetch URLs. ++ +With '--add', instead of changing existing URLs, new URL is added. ++ +With '--delete', instead of changing existing URLs, all URLs matching +regex <url> are deleted for remote <name>. Trying to delete all +non-push URLs is an error. ++ +Note that the push URL and the fetch URL, even though they can +be set differently, must still refer to the same place. What you +pushed to the push URL should be what you would see if you +immediately fetched from the fetch URL. If you are trying to +fetch from one place (e.g. your upstream) and push to another (e.g. +your publishing repository), use two separate remotes. + + +'show':: + +Gives some information about the remote <name>. ++ +With `-n` option, the remote heads are not queried first with +`git ls-remote <name>`; cached information is used instead. + +'prune':: + +Deletes all stale remote-tracking branches under <name>. +These stale branches have already been removed from the remote repository +referenced by <name>, but are still locally available in +"remotes/<name>". ++ +With `--dry-run` option, report what branches will be pruned, but do not +actually prune them. + +'update':: + +Fetch updates for a named set of remotes in the repository as defined by +remotes.<group>. If a named group is not specified on the command line, +the configuration parameter remotes.default will be used; if +remotes.default is not defined, all remotes which do not have the +configuration parameter remote.<name>.skipDefaultUpdate set to true will +be updated. (See linkgit:git-config[1]). ++ +With `--prune` option, prune all the remotes that are updated. + + +DISCUSSION +---------- + +The remote configuration is achieved using the `remote.origin.url` and +`remote.origin.fetch` configuration variables. (See +linkgit:git-config[1]). + +Examples +-------- + +* Add a new remote, fetch, and check out a branch from it ++ +------------ +$ git remote +origin +$ git branch -r + origin/HEAD -> origin/master + origin/master +$ git remote add staging git://git.kernel.org/.../gregkh/staging.git +$ git remote +origin +staging +$ git fetch staging +... +From git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/staging + * [new branch] master -> staging/master + * [new branch] staging-linus -> staging/staging-linus + * [new branch] staging-next -> staging/staging-next +$ git branch -r + origin/HEAD -> origin/master + origin/master + staging/master + staging/staging-linus + staging/staging-next +$ git checkout -b staging staging/master +... +------------ + +* Imitate 'git clone' but track only selected branches ++ +------------ +$ mkdir project.git +$ cd project.git +$ git init +$ git remote add -f -t master -m master origin git://example.com/git.git/ +$ git merge origin +------------ + + +SEE ALSO +-------- +linkgit:git-fetch[1] +linkgit:git-branch[1] +linkgit:git-config[1] + +GIT +--- +Part of the linkgit:git[1] suite diff --git a/Documentation/git-repack.txt b/Documentation/git-repack.txt new file mode 100644 index 0000000..b9c02ce --- /dev/null +++ b/Documentation/git-repack.txt @@ -0,0 +1,151 @@ +git-repack(1) +============= + +NAME +---- +git-repack - Pack unpacked objects in a repository + + +SYNOPSIS +-------- +[verse] +'git repack' [-a] [-A] [-d] [-f] [-F] [-l] [-n] [-q] [-b] [--window=<n>] [--depth=<n>] + +DESCRIPTION +----------- + +This command is used to combine all objects that do not currently +reside in a "pack", into a pack. It can also be used to re-organize +existing packs into a single, more efficient pack. + +A pack is a collection of objects, individually compressed, with +delta compression applied, stored in a single file, with an +associated index file. + +Packs are used to reduce the load on mirror systems, backup +engines, disk storage, etc. + +OPTIONS +------- + +-a:: + Instead of incrementally packing the unpacked objects, + pack everything referenced into a single pack. + Especially useful when packing a repository that is used + for private development. Use + with '-d'. This will clean up the objects that `git prune` + leaves behind, but `git fsck --full --dangling` shows as + dangling. ++ +Note that users fetching over dumb protocols will have to fetch the +whole new pack in order to get any contained object, no matter how many +other objects in that pack they already have locally. + +-A:: + Same as `-a`, unless '-d' is used. Then any unreachable + objects in a previous pack become loose, unpacked objects, + instead of being left in the old pack. Unreachable objects + are never intentionally added to a pack, even when repacking. + This option prevents unreachable objects from being immediately + deleted by way of being left in the old pack and then + removed. Instead, the loose unreachable objects + will be pruned according to normal expiry rules + with the next 'git gc' invocation. See linkgit:git-gc[1]. + +-d:: + After packing, if the newly created packs make some + existing packs redundant, remove the redundant packs. + Also run 'git prune-packed' to remove redundant + loose object files. + +-l:: + Pass the `--local` option to 'git pack-objects'. See + linkgit:git-pack-objects[1]. + +-f:: + Pass the `--no-reuse-delta` option to `git-pack-objects`, see + linkgit:git-pack-objects[1]. + +-F:: + Pass the `--no-reuse-object` option to `git-pack-objects`, see + linkgit:git-pack-objects[1]. + +-q:: + Pass the `-q` option to 'git pack-objects'. See + linkgit:git-pack-objects[1]. + +-n:: + Do not update the server information with + 'git update-server-info'. This option skips + updating local catalog files needed to publish + this repository (or a direct copy of it) + over HTTP or FTP. See linkgit:git-update-server-info[1]. + +--window=<n>:: +--depth=<n>:: + These two options affect how the objects contained in the pack are + stored using delta compression. The objects are first internally + sorted by type, size and optionally names and compared against the + other objects within `--window` to see if using delta compression saves + space. `--depth` limits the maximum delta depth; making it too deep + affects the performance on the unpacker side, because delta data needs + to be applied that many times to get to the necessary object. + The default value for --window is 10 and --depth is 50. + +--window-memory=<n>:: + This option provides an additional limit on top of `--window`; + the window size will dynamically scale down so as to not take + up more than '<n>' bytes in memory. This is useful in + repositories with a mix of large and small objects to not run + out of memory with a large window, but still be able to take + advantage of the large window for the smaller objects. The + size can be suffixed with "k", "m", or "g". + `--window-memory=0` makes memory usage unlimited, which is the + default. + +--max-pack-size=<n>:: + Maximum size of each output pack file. The size can be suffixed with + "k", "m", or "g". The minimum size allowed is limited to 1 MiB. + If specified, multiple packfiles may be created, which also + prevents the creation of a bitmap index. + The default is unlimited, unless the config variable + `pack.packSizeLimit` is set. + +-b:: +--write-bitmap-index:: + Write a reachability bitmap index as part of the repack. This + only makes sense when used with `-a` or `-A`, as the bitmaps + must be able to refer to all reachable objects. This option + overrides the setting of `repack.writeBitmaps`. This option + has no effect if multiple packfiles are created. + +--pack-kept-objects:: + Include objects in `.keep` files when repacking. Note that we + still do not delete `.keep` packs after `pack-objects` finishes. + This means that we may duplicate objects, but this makes the + option safe to use when there are concurrent pushes or fetches. + This option is generally only useful if you are writing bitmaps + with `-b` or `repack.writeBitmaps`, as it ensures that the + bitmapped packfile has the necessary objects. + +Configuration +------------- + +By default, the command passes `--delta-base-offset` option to +'git pack-objects'; this typically results in slightly smaller packs, +but the generated packs are incompatible with versions of Git older than +version 1.4.4. If you need to share your repository with such ancient Git +versions, either directly or via the dumb http protocol, then you +need to set the configuration variable `repack.UseDeltaBaseOffset` to +"false" and repack. Access from old Git versions over the native protocol +is unaffected by this option as the conversion is performed on the fly +as needed in that case. + +SEE ALSO +-------- +linkgit:git-pack-objects[1] +linkgit:git-prune-packed[1] + +GIT +--- +Part of the linkgit:git[1] suite diff --git a/Documentation/git-replace.txt b/Documentation/git-replace.txt new file mode 100644 index 0000000..8fff598 --- /dev/null +++ b/Documentation/git-replace.txt @@ -0,0 +1,156 @@ +git-replace(1) +============== + +NAME +---- +git-replace - Create, list, delete refs to replace objects + +SYNOPSIS +-------- +[verse] +'git replace' [-f] <object> <replacement> +'git replace' [-f] --edit <object> +'git replace' [-f] --graft <commit> [<parent>...] +'git replace' -d <object>... +'git replace' [--format=<format>] [-l [<pattern>]] + +DESCRIPTION +----------- +Adds a 'replace' reference in `refs/replace/` namespace. + +The name of the 'replace' reference is the SHA-1 of the object that is +replaced. The content of the 'replace' reference is the SHA-1 of the +replacement object. + +The replaced object and the replacement object must be of the same type. +This restriction can be bypassed using `-f`. + +Unless `-f` is given, the 'replace' reference must not yet exist. + +There is no other restriction on the replaced and replacement objects. +Merge commits can be replaced by non-merge commits and vice versa. + +Replacement references will be used by default by all Git commands +except those doing reachability traversal (prune, pack transfer and +fsck). + +It is possible to disable use of replacement references for any +command using the `--no-replace-objects` option just after 'git'. + +For example if commit 'foo' has been replaced by commit 'bar': + +------------------------------------------------ +$ git --no-replace-objects cat-file commit foo +------------------------------------------------ + +shows information about commit 'foo', while: + +------------------------------------------------ +$ git cat-file commit foo +------------------------------------------------ + +shows information about commit 'bar'. + +The 'GIT_NO_REPLACE_OBJECTS' environment variable can be set to +achieve the same effect as the `--no-replace-objects` option. + +OPTIONS +------- +-f:: +--force:: + If an existing replace ref for the same object exists, it will + be overwritten (instead of failing). + +-d:: +--delete:: + Delete existing replace refs for the given objects. + +--edit <object>:: + Edit an object's content interactively. The existing content + for <object> is pretty-printed into a temporary file, an + editor is launched on the file, and the result is parsed to + create a new object of the same type as <object>. A + replacement ref is then created to replace <object> with the + newly created object. See linkgit:git-var[1] for details about + how the editor will be chosen. + +--raw:: + When editing, provide the raw object contents rather than + pretty-printed ones. Currently this only affects trees, which + will be shown in their binary form. This is harder to work with, + but can help when repairing a tree that is so corrupted it + cannot be pretty-printed. Note that you may need to configure + your editor to cleanly read and write binary data. + +--graft <commit> [<parent>...]:: + Create a graft commit. A new commit is created with the same + content as <commit> except that its parents will be + [<parent>...] instead of <commit>'s parents. A replacement ref + is then created to replace <commit> with the newly created + commit. See contrib/convert-grafts-to-replace-refs.sh for an + example script based on this option that can convert grafts to + replace refs. + +-l <pattern>:: +--list <pattern>:: + List replace refs for objects that match the given pattern (or + all if no pattern is given). + Typing "git replace" without arguments, also lists all replace + refs. + +--format=<format>:: + When listing, use the specified <format>, which can be one of + 'short', 'medium' and 'long'. When omitted, the format + defaults to 'short'. + +FORMATS +------- + +The following format are available: + +* 'short': + <replaced sha1> +* 'medium': + <replaced sha1> -> <replacement sha1> +* 'long': + <replaced sha1> (<replaced type>) -> <replacement sha1> (<replacement type>) + +CREATING REPLACEMENT OBJECTS +---------------------------- + +linkgit:git-filter-branch[1], linkgit:git-hash-object[1] and +linkgit:git-rebase[1], among other git commands, can be used to create +replacement objects from existing objects. The `--edit` option can +also be used with 'git replace' to create a replacement object by +editing an existing object. + +If you want to replace many blobs, trees or commits that are part of a +string of commits, you may just want to create a replacement string of +commits and then only replace the commit at the tip of the target +string of commits with the commit at the tip of the replacement string +of commits. + +BUGS +---- +Comparing blobs or trees that have been replaced with those that +replace them will not work properly. And using `git reset --hard` to +go back to a replaced commit will move the branch to the replacement +commit instead of the replaced commit. + +There may be other problems when using 'git rev-list' related to +pending objects. + +SEE ALSO +-------- +linkgit:git-hash-object[1] +linkgit:git-filter-branch[1] +linkgit:git-rebase[1] +linkgit:git-tag[1] +linkgit:git-branch[1] +linkgit:git-commit[1] +linkgit:git-var[1] +linkgit:git[1] + +GIT +--- +Part of the linkgit:git[1] suite diff --git a/Documentation/git-request-pull.txt b/Documentation/git-request-pull.txt new file mode 100644 index 0000000..c32cb0b --- /dev/null +++ b/Documentation/git-request-pull.txt @@ -0,0 +1,79 @@ +git-request-pull(1) +=================== + +NAME +---- +git-request-pull - Generates a summary of pending changes + +SYNOPSIS +-------- +[verse] +'git request-pull' [-p] <start> <url> [<end>] + +DESCRIPTION +----------- + +Generate a request asking your upstream project to pull changes into +their tree. The request, printed to the standard output, +begins with the branch description, summarizes +the changes and indicates from where they can be pulled. + +The upstream project is expected to have the commit named by +`<start>` and the output asks it to integrate the changes you made +since that commit, up to the commit named by `<end>`, by visiting +the repository named by `<url>`. + + +OPTIONS +------- +-p:: + Include patch text in the output. + +<start>:: + Commit to start at. This names a commit that is already in + the upstream history. + +<url>:: + The repository URL to be pulled from. + +<end>:: + Commit to end at (defaults to HEAD). This names the commit + at the tip of the history you are asking to be pulled. ++ +When the repository named by `<url>` has the commit at a tip of a +ref that is different from the ref you have locally, you can use the +`<local>:<remote>` syntax, to have its local name, a colon `:`, and +its remote name. + + +EXAMPLE +------- + +Imagine that you built your work on your `master` branch on top of +the `v1.0` release, and want it to be integrated to the project. +First you push that change to your public repository for others to +see: + + git push https://git.ko.xz/project master + +Then, you run this command: + + git request-pull v1.0 https://git.ko.xz/project master + +which will produce a request to the upstream, summarizing the +changes between the `v1.0` release and your `master`, to pull it +from your public repository. + +If you pushed your change to a branch whose name is different from +the one you have locally, e.g. + + git push https://git.ko.xz/project master:for-linus + +then you can ask that to be pulled with + + git request-pull v1.0 https://git.ko.xz/project master:for-linus + + +GIT +--- +Part of the linkgit:git[1] suite diff --git a/Documentation/git-rerere.txt b/Documentation/git-rerere.txt new file mode 100644 index 0000000..9ee083c --- /dev/null +++ b/Documentation/git-rerere.txt @@ -0,0 +1,216 @@ +git-rerere(1) +============= + +NAME +---- +git-rerere - Reuse recorded resolution of conflicted merges + +SYNOPSIS +-------- +[verse] +'git rerere' ['clear'|'forget' <pathspec>|'diff'|'remaining'|'status'|'gc'] + +DESCRIPTION +----------- + +In a workflow employing relatively long lived topic branches, +the developer sometimes needs to resolve the same conflicts over +and over again until the topic branches are done (either merged +to the "release" branch, or sent out and accepted upstream). + +This command assists the developer in this process by recording +conflicted automerge results and corresponding hand resolve results +on the initial manual merge, and applying previously recorded +hand resolutions to their corresponding automerge results. + +[NOTE] +You need to set the configuration variable rerere.enabled in order to +enable this command. + + +COMMANDS +-------- + +Normally, 'git rerere' is run without arguments or user-intervention. +However, it has several commands that allow it to interact with +its working state. + +'clear':: + +Reset the metadata used by rerere if a merge resolution is to be +aborted. Calling 'git am [--skip|--abort]' or 'git rebase [--skip|--abort]' +will automatically invoke this command. + +'forget' <pathspec>:: + +Reset the conflict resolutions which rerere has recorded for the current +conflict in <pathspec>. + +'diff':: + +Display diffs for the current state of the resolution. It is +useful for tracking what has changed while the user is resolving +conflicts. Additional arguments are passed directly to the system +'diff' command installed in PATH. + +'status':: + +Print paths with conflicts whose merge resolution rerere will record. + +'remaining':: + +Print paths with conflicts that have not been autoresolved by rerere. +This includes paths whose resolutions cannot be tracked by rerere, +such as conflicting submodules. + +'gc':: + +Prune records of conflicted merges that +occurred a long time ago. By default, unresolved conflicts older +than 15 days and resolved conflicts older than 60 +days are pruned. These defaults are controlled via the +`gc.rerereUnresolved` and `gc.rerereResolved` configuration +variables respectively. + + +DISCUSSION +---------- + +When your topic branch modifies an overlapping area that your +master branch (or upstream) touched since your topic branch +forked from it, you may want to test it with the latest master, +even before your topic branch is ready to be pushed upstream: + +------------ + o---*---o topic + / + o---o---o---*---o---o master +------------ + +For such a test, you need to merge master and topic somehow. +One way to do it is to pull master into the topic branch: + +------------ + $ git checkout topic + $ git merge master + + o---*---o---+ topic + / / + o---o---o---*---o---o master +------------ + +The commits marked with `*` touch the same area in the same +file; you need to resolve the conflicts when creating the commit +marked with `+`. Then you can test the result to make sure your +work-in-progress still works with what is in the latest master. + +After this test merge, there are two ways to continue your work +on the topic. The easiest is to build on top of the test merge +commit `+`, and when your work in the topic branch is finally +ready, pull the topic branch into master, and/or ask the +upstream to pull from you. By that time, however, the master or +the upstream might have been advanced since the test merge `+`, +in which case the final commit graph would look like this: + +------------ + $ git checkout topic + $ git merge master + $ ... work on both topic and master branches + $ git checkout master + $ git merge topic + + o---*---o---+---o---o topic + / / \ + o---o---o---*---o---o---o---o---+ master +------------ + +When your topic branch is long-lived, however, your topic branch +would end up having many such "Merge from master" commits on it, +which would unnecessarily clutter the development history. +Readers of the Linux kernel mailing list may remember that Linus +complained about such too frequent test merges when a subsystem +maintainer asked to pull from a branch full of "useless merges". + +As an alternative, to keep the topic branch clean of test +merges, you could blow away the test merge, and keep building on +top of the tip before the test merge: + +------------ + $ git checkout topic + $ git merge master + $ git reset --hard HEAD^ ;# rewind the test merge + $ ... work on both topic and master branches + $ git checkout master + $ git merge topic + + o---*---o-------o---o topic + / \ + o---o---o---*---o---o---o---o---+ master +------------ + +This would leave only one merge commit when your topic branch is +finally ready and merged into the master branch. This merge +would require you to resolve the conflict, introduced by the +commits marked with `*`. However, this conflict is often the +same conflict you resolved when you created the test merge you +blew away. 'git rerere' helps you resolve this final +conflicted merge using the information from your earlier hand +resolve. + +Running the 'git rerere' command immediately after a conflicted +automerge records the conflicted working tree files, with the +usual conflict markers `<<<<<<<`, `=======`, and `>>>>>>>` in +them. Later, after you are done resolving the conflicts, +running 'git rerere' again will record the resolved state of these +files. Suppose you did this when you created the test merge of +master into the topic branch. + +Next time, after seeing the same conflicted automerge, +running 'git rerere' will perform a three-way merge between the +earlier conflicted automerge, the earlier manual resolution, and +the current conflicted automerge. +If this three-way merge resolves cleanly, the result is written +out to your working tree file, so you do not have to manually +resolve it. Note that 'git rerere' leaves the index file alone, +so you still need to do the final sanity checks with `git diff` +(or `git diff -c`) and 'git add' when you are satisfied. + +As a convenience measure, 'git merge' automatically invokes +'git rerere' upon exiting with a failed automerge and 'git rerere' +records the hand resolve when it is a new conflict, or reuses the earlier hand +resolve when it is not. 'git commit' also invokes 'git rerere' +when committing a merge result. What this means is that you do +not have to do anything special yourself (besides enabling +the rerere.enabled config variable). + +In our example, when you do the test merge, the manual +resolution is recorded, and it will be reused when you do the +actual merge later with the updated master and topic branch, as long +as the recorded resolution is still applicable. + +The information 'git rerere' records is also used when running +'git rebase'. After blowing away the test merge and continuing +development on the topic branch: + +------------ + o---*---o-------o---o topic + / + o---o---o---*---o---o---o---o master + + $ git rebase master topic + + o---*---o-------o---o topic + / + o---o---o---*---o---o---o---o master +------------ + +you could run `git rebase master topic`, to bring yourself +up-to-date before your topic is ready to be sent upstream. +This would result in falling back to a three-way merge, and it +would conflict the same way as the test merge you resolved earlier. +'git rerere' will be run by 'git rebase' to help you resolve this +conflict. + +GIT +--- +Part of the linkgit:git[1] suite diff --git a/Documentation/git-reset.txt b/Documentation/git-reset.txt new file mode 100644 index 0000000..25432d9 --- /dev/null +++ b/Documentation/git-reset.txt @@ -0,0 +1,406 @@ +git-reset(1) +============ + +NAME +---- +git-reset - Reset current HEAD to the specified state + +SYNOPSIS +-------- +[verse] +'git reset' [-q] [<tree-ish>] [--] <paths>... +'git reset' (--patch | -p) [<tree-ish>] [--] [<paths>...] +'git reset' [--soft | --mixed [-N] | --hard | --merge | --keep] [-q] [<commit>] + +DESCRIPTION +----------- +In the first and second form, copy entries from <tree-ish> to the index. +In the third form, set the current branch head (HEAD) to <commit>, optionally +modifying index and working tree to match. The <tree-ish>/<commit> defaults +to HEAD in all forms. + +'git reset' [-q] [<tree-ish>] [--] <paths>...:: + This form resets the index entries for all <paths> to their + state at <tree-ish>. (It does not affect the working tree or + the current branch.) ++ +This means that `git reset <paths>` is the opposite of `git add +<paths>`. ++ +After running `git reset <paths>` to update the index entry, you can +use linkgit:git-checkout[1] to check the contents out of the index to +the working tree. +Alternatively, using linkgit:git-checkout[1] and specifying a commit, you +can copy the contents of a path out of a commit to the index and to the +working tree in one go. + +'git reset' (--patch | -p) [<tree-ish>] [--] [<paths>...]:: + Interactively select hunks in the difference between the index + and <tree-ish> (defaults to HEAD). The chosen hunks are applied + in reverse to the index. ++ +This means that `git reset -p` is the opposite of `git add -p`, i.e. +you can use it to selectively reset hunks. See the ``Interactive Mode'' +section of linkgit:git-add[1] to learn how to operate the `--patch` mode. + +'git reset' [<mode>] [<commit>]:: + This form resets the current branch head to <commit> and + possibly updates the index (resetting it to the tree of <commit>) and + the working tree depending on <mode>. If <mode> is omitted, + defaults to "--mixed". The <mode> must be one of the following: ++ +-- +--soft:: + Does not touch the index file or the working tree at all (but + resets the head to <commit>, just like all modes do). This leaves + all your changed files "Changes to be committed", as 'git status' + would put it. + +--mixed:: + Resets the index but not the working tree (i.e., the changed files + are preserved but not marked for commit) and reports what has not + been updated. This is the default action. ++ +If `-N` is specified, removed paths are marked as intent-to-add (see +linkgit:git-add[1]). + +--hard:: + Resets the index and working tree. Any changes to tracked files in the + working tree since <commit> are discarded. + +--merge:: + Resets the index and updates the files in the working tree that are + different between <commit> and HEAD, but keeps those which are + different between the index and working tree (i.e. which have changes + which have not been added). + If a file that is different between <commit> and the index has unstaged + changes, reset is aborted. ++ +In other words, --merge does something like a 'git read-tree -u -m <commit>', +but carries forward unmerged index entries. + +--keep:: + Resets index entries and updates files in the working tree that are + different between <commit> and HEAD. + If a file that is different between <commit> and HEAD has local changes, + reset is aborted. +-- + +If you want to undo a commit other than the latest on a branch, +linkgit:git-revert[1] is your friend. + + +OPTIONS +------- + +-q:: +--quiet:: + Be quiet, only report errors. + + +EXAMPLES +-------- + +Undo add:: ++ +------------ +$ edit <1> +$ git add frotz.c filfre.c +$ mailx <2> +$ git reset <3> +$ git pull git://info.example.com/ nitfol <4> +------------ ++ +<1> You are happily working on something, and find the changes +in these files are in good order. You do not want to see them +when you run "git diff", because you plan to work on other files +and changes with these files are distracting. +<2> Somebody asks you to pull, and the changes sounds worthy of merging. +<3> However, you already dirtied the index (i.e. your index does +not match the HEAD commit). But you know the pull you are going +to make does not affect frotz.c or filfre.c, so you revert the +index changes for these two files. Your changes in working tree +remain there. +<4> Then you can pull and merge, leaving frotz.c and filfre.c +changes still in the working tree. + +Undo a commit and redo:: ++ +------------ +$ git commit ... +$ git reset --soft HEAD^ <1> +$ edit <2> +$ git commit -a -c ORIG_HEAD <3> +------------ ++ +<1> This is most often done when you remembered what you +just committed is incomplete, or you misspelled your commit +message, or both. Leaves working tree as it was before "reset". +<2> Make corrections to working tree files. +<3> "reset" copies the old head to .git/ORIG_HEAD; redo the +commit by starting with its log message. If you do not need to +edit the message further, you can give -C option instead. ++ +See also the --amend option to linkgit:git-commit[1]. + +Undo a commit, making it a topic branch:: ++ +------------ +$ git branch topic/wip <1> +$ git reset --hard HEAD~3 <2> +$ git checkout topic/wip <3> +------------ ++ +<1> You have made some commits, but realize they were premature +to be in the "master" branch. You want to continue polishing +them in a topic branch, so create "topic/wip" branch off of the +current HEAD. +<2> Rewind the master branch to get rid of those three commits. +<3> Switch to "topic/wip" branch and keep working. + +Undo commits permanently:: ++ +------------ +$ git commit ... +$ git reset --hard HEAD~3 <1> +------------ ++ +<1> The last three commits (HEAD, HEAD^, and HEAD~2) were bad +and you do not want to ever see them again. Do *not* do this if +you have already given these commits to somebody else. (See the +"RECOVERING FROM UPSTREAM REBASE" section in linkgit:git-rebase[1] for +the implications of doing so.) + +Undo a merge or pull:: ++ +------------ +$ git pull <1> +Auto-merging nitfol +CONFLICT (content): Merge conflict in nitfol +Automatic merge failed; fix conflicts and then commit the result. +$ git reset --hard <2> +$ git pull . topic/branch <3> +Updating from 41223... to 13134... +Fast-forward +$ git reset --hard ORIG_HEAD <4> +------------ ++ +<1> Try to update from the upstream resulted in a lot of +conflicts; you were not ready to spend a lot of time merging +right now, so you decide to do that later. +<2> "pull" has not made merge commit, so "git reset --hard" +which is a synonym for "git reset --hard HEAD" clears the mess +from the index file and the working tree. +<3> Merge a topic branch into the current branch, which resulted +in a fast-forward. +<4> But you decided that the topic branch is not ready for public +consumption yet. "pull" or "merge" always leaves the original +tip of the current branch in ORIG_HEAD, so resetting hard to it +brings your index file and the working tree back to that state, +and resets the tip of the branch to that commit. + +Undo a merge or pull inside a dirty working tree:: ++ +------------ +$ git pull <1> +Auto-merging nitfol +Merge made by recursive. + nitfol | 20 +++++---- + ... +$ git reset --merge ORIG_HEAD <2> +------------ ++ +<1> Even if you may have local modifications in your +working tree, you can safely say "git pull" when you know +that the change in the other branch does not overlap with +them. +<2> After inspecting the result of the merge, you may find +that the change in the other branch is unsatisfactory. Running +"git reset --hard ORIG_HEAD" will let you go back to where you +were, but it will discard your local changes, which you do not +want. "git reset --merge" keeps your local changes. + + +Interrupted workflow:: ++ +Suppose you are interrupted by an urgent fix request while you +are in the middle of a large change. The files in your +working tree are not in any shape to be committed yet, but you +need to get to the other branch for a quick bugfix. ++ +------------ +$ git checkout feature ;# you were working in "feature" branch and +$ work work work ;# got interrupted +$ git commit -a -m "snapshot WIP" <1> +$ git checkout master +$ fix fix fix +$ git commit ;# commit with real log +$ git checkout feature +$ git reset --soft HEAD^ ;# go back to WIP state <2> +$ git reset <3> +------------ ++ +<1> This commit will get blown away so a throw-away log message is OK. +<2> This removes the 'WIP' commit from the commit history, and sets + your working tree to the state just before you made that snapshot. +<3> At this point the index file still has all the WIP changes you + committed as 'snapshot WIP'. This updates the index to show your + WIP files as uncommitted. ++ +See also linkgit:git-stash[1]. + +Reset a single file in the index:: ++ +Suppose you have added a file to your index, but later decide you do not +want to add it to your commit. You can remove the file from the index +while keeping your changes with git reset. ++ +------------ +$ git reset -- frotz.c <1> +$ git commit -m "Commit files in index" <2> +$ git add frotz.c <3> +------------ ++ +<1> This removes the file from the index while keeping it in the working + directory. +<2> This commits all other changes in the index. +<3> Adds the file to the index again. + +Keep changes in working tree while discarding some previous commits:: ++ +Suppose you are working on something and you commit it, and then you +continue working a bit more, but now you think that what you have in +your working tree should be in another branch that has nothing to do +with what you committed previously. You can start a new branch and +reset it while keeping the changes in your working tree. ++ +------------ +$ git tag start +$ git checkout -b branch1 +$ edit +$ git commit ... <1> +$ edit +$ git checkout -b branch2 <2> +$ git reset --keep start <3> +------------ ++ +<1> This commits your first edits in branch1. +<2> In the ideal world, you could have realized that the earlier + commit did not belong to the new topic when you created and switched + to branch2 (i.e. "git checkout -b branch2 start"), but nobody is + perfect. +<3> But you can use "reset --keep" to remove the unwanted commit after + you switched to "branch2". + + +DISCUSSION +---------- + +The tables below show what happens when running: + +---------- +git reset --option target +---------- + +to reset the HEAD to another commit (`target`) with the different +reset options depending on the state of the files. + +In these tables, A, B, C and D are some different states of a +file. For example, the first line of the first table means that if a +file is in state A in the working tree, in state B in the index, in +state C in HEAD and in state D in the target, then "git reset --soft +target" will leave the file in the working tree in state A and in the +index in state B. It resets (i.e. moves) the HEAD (i.e. the tip of +the current branch, if you are on one) to "target" (which has the file +in state D). + + working index HEAD target working index HEAD + ---------------------------------------------------- + A B C D --soft A B D + --mixed A D D + --hard D D D + --merge (disallowed) + --keep (disallowed) + + working index HEAD target working index HEAD + ---------------------------------------------------- + A B C C --soft A B C + --mixed A C C + --hard C C C + --merge (disallowed) + --keep A C C + + working index HEAD target working index HEAD + ---------------------------------------------------- + B B C D --soft B B D + --mixed B D D + --hard D D D + --merge D D D + --keep (disallowed) + + working index HEAD target working index HEAD + ---------------------------------------------------- + B B C C --soft B B C + --mixed B C C + --hard C C C + --merge C C C + --keep B C C + + working index HEAD target working index HEAD + ---------------------------------------------------- + B C C D --soft B C D + --mixed B D D + --hard D D D + --merge (disallowed) + --keep (disallowed) + + working index HEAD target working index HEAD + ---------------------------------------------------- + B C C C --soft B C C + --mixed B C C + --hard C C C + --merge B C C + --keep B C C + +"reset --merge" is meant to be used when resetting out of a conflicted +merge. Any mergy operation guarantees that the working tree file that is +involved in the merge does not have local change wrt the index before +it starts, and that it writes the result out to the working tree. So if +we see some difference between the index and the target and also +between the index and the working tree, then it means that we are not +resetting out from a state that a mergy operation left after failing +with a conflict. That is why we disallow --merge option in this case. + +"reset --keep" is meant to be used when removing some of the last +commits in the current branch while keeping changes in the working +tree. If there could be conflicts between the changes in the commit we +want to remove and the changes in the working tree we want to keep, +the reset is disallowed. That's why it is disallowed if there are both +changes between the working tree and HEAD, and between HEAD and the +target. To be safe, it is also disallowed when there are unmerged +entries. + +The following tables show what happens when there are unmerged +entries: + + working index HEAD target working index HEAD + ---------------------------------------------------- + X U A B --soft (disallowed) + --mixed X B B + --hard B B B + --merge B B B + --keep (disallowed) + + working index HEAD target working index HEAD + ---------------------------------------------------- + X U A A --soft (disallowed) + --mixed X A A + --hard A A A + --merge A A A + --keep (disallowed) + +X means any state and U means an unmerged index. + +GIT +--- +Part of the linkgit:git[1] suite diff --git a/Documentation/git-rev-list.txt b/Documentation/git-rev-list.txt new file mode 100644 index 0000000..ef22f17 --- /dev/null +++ b/Documentation/git-rev-list.txt @@ -0,0 +1,121 @@ +git-rev-list(1) +=============== + +NAME +---- +git-rev-list - Lists commit objects in reverse chronological order + + +SYNOPSIS +-------- +[verse] +'git rev-list' [ --max-count=<number> ] + [ --skip=<number> ] + [ --max-age=<timestamp> ] + [ --min-age=<timestamp> ] + [ --sparse ] + [ --merges ] + [ --no-merges ] + [ --min-parents=<number> ] + [ --no-min-parents ] + [ --max-parents=<number> ] + [ --no-max-parents ] + [ --first-parent ] + [ --remove-empty ] + [ --full-history ] + [ --not ] + [ --all ] + [ --branches[=<pattern>] ] + [ --tags[=<pattern>] ] + [ --remotes[=<pattern>] ] + [ --glob=<glob-pattern> ] + [ --ignore-missing ] + [ --stdin ] + [ --quiet ] + [ --topo-order ] + [ --parents ] + [ --timestamp ] + [ --left-right ] + [ --left-only ] + [ --right-only ] + [ --cherry-mark ] + [ --cherry-pick ] + [ --encoding=<encoding> ] + [ --(author|committer|grep)=<pattern> ] + [ --regexp-ignore-case | -i ] + [ --extended-regexp | -E ] + [ --fixed-strings | -F ] + [ --date=<format>] + [ [ --objects | --objects-edge | --objects-edge-aggressive ] + [ --unpacked ] ] + [ --pretty | --header ] + [ --bisect ] + [ --bisect-vars ] + [ --bisect-all ] + [ --merge ] + [ --reverse ] + [ --walk-reflogs ] + [ --no-walk ] [ --do-walk ] + [ --count ] + [ --use-bitmap-index ] + <commit>... [ \-- <paths>... ] + +DESCRIPTION +----------- + +List commits that are reachable by following the `parent` links from the +given commit(s), but exclude commits that are reachable from the one(s) +given with a '{caret}' in front of them. The output is given in reverse +chronological order by default. + +You can think of this as a set operation. Commits given on the command +line form a set of commits that are reachable from any of them, and then +commits reachable from any of the ones given with '{caret}' in front are +subtracted from that set. The remaining commits are what comes out in the +command's output. Various other options and paths parameters can be used +to further limit the result. + +Thus, the following command: + +----------------------------------------------------------------------- + $ git rev-list foo bar ^baz +----------------------------------------------------------------------- + +means "list all the commits which are reachable from 'foo' or 'bar', but +not from 'baz'". + +A special notation "'<commit1>'..'<commit2>'" can be used as a +short-hand for "{caret}'<commit1>' '<commit2>'". For example, either of +the following may be used interchangeably: + +----------------------------------------------------------------------- + $ git rev-list origin..HEAD + $ git rev-list HEAD ^origin +----------------------------------------------------------------------- + +Another special notation is "'<commit1>'...'<commit2>'" which is useful +for merges. The resulting set of commits is the symmetric difference +between the two operands. The following two commands are equivalent: + +----------------------------------------------------------------------- + $ git rev-list A B --not $(git merge-base --all A B) + $ git rev-list A...B +----------------------------------------------------------------------- + +'rev-list' is a very essential Git command, since it +provides the ability to build and traverse commit ancestry graphs. For +this reason, it has a lot of different options that enables it to be +used by commands as different as 'git bisect' and +'git repack'. + +OPTIONS +------- + +:git-rev-list: 1 +include::rev-list-options.txt[] + +include::pretty-formats.txt[] + +GIT +--- +Part of the linkgit:git[1] suite diff --git a/Documentation/git-rev-parse.txt b/Documentation/git-rev-parse.txt new file mode 100644 index 0000000..b6c6326 --- /dev/null +++ b/Documentation/git-rev-parse.txt @@ -0,0 +1,442 @@ +git-rev-parse(1) +================ + +NAME +---- +git-rev-parse - Pick out and massage parameters + + +SYNOPSIS +-------- +[verse] +'git rev-parse' [ --option ] <args>... + +DESCRIPTION +----------- + +Many Git porcelainish commands take mixture of flags +(i.e. parameters that begin with a dash '-') and parameters +meant for the underlying 'git rev-list' command they use internally +and flags and parameters for the other commands they use +downstream of 'git rev-list'. This command is used to +distinguish between them. + + +OPTIONS +------- + +Operation Modes +~~~~~~~~~~~~~~~ + +Each of these options must appear first on the command line. + +--parseopt:: + Use 'git rev-parse' in option parsing mode (see PARSEOPT section below). + +--sq-quote:: + Use 'git rev-parse' in shell quoting mode (see SQ-QUOTE + section below). In contrast to the `--sq` option below, this + mode does only quoting. Nothing else is done to command input. + +Options for --parseopt +~~~~~~~~~~~~~~~~~~~~~~ + +--keep-dashdash:: + Only meaningful in `--parseopt` mode. Tells the option parser to echo + out the first `--` met instead of skipping it. + +--stop-at-non-option:: + Only meaningful in `--parseopt` mode. Lets the option parser stop at + the first non-option argument. This can be used to parse sub-commands + that take options themselves. + +--stuck-long:: + Only meaningful in `--parseopt` mode. Output the options in their + long form if available, and with their arguments stuck. + +Options for Filtering +~~~~~~~~~~~~~~~~~~~~~ + +--revs-only:: + Do not output flags and parameters not meant for + 'git rev-list' command. + +--no-revs:: + Do not output flags and parameters meant for + 'git rev-list' command. + +--flags:: + Do not output non-flag parameters. + +--no-flags:: + Do not output flag parameters. + +Options for Output +~~~~~~~~~~~~~~~~~~ + +--default <arg>:: + If there is no parameter given by the user, use `<arg>` + instead. + +--prefix <arg>:: + Behave as if 'git rev-parse' was invoked from the `<arg>` + subdirectory of the working tree. Any relative filenames are + resolved as if they are prefixed by `<arg>` and will be printed + in that form. ++ +This can be used to convert arguments to a command run in a subdirectory +so that they can still be used after moving to the top-level of the +repository. For example: ++ +---- +prefix=$(git rev-parse --show-prefix) +cd "$(git rev-parse --show-toplevel)" +eval "set -- $(git rev-parse --sq --prefix "$prefix" "$@")" +---- + +--verify:: + Verify that exactly one parameter is provided, and that it + can be turned into a raw 20-byte SHA-1 that can be used to + access the object database. If so, emit it to the standard + output; otherwise, error out. ++ +If you want to make sure that the output actually names an object in +your object database and/or can be used as a specific type of object +you require, you can add the `^{type}` peeling operator to the parameter. +For example, `git rev-parse "$VAR^{commit}"` will make sure `$VAR` +names an existing object that is a commit-ish (i.e. a commit, or an +annotated tag that points at a commit). To make sure that `$VAR` +names an existing object of any type, `git rev-parse "$VAR^{object}"` +can be used. + +-q:: +--quiet:: + Only meaningful in `--verify` mode. Do not output an error + message if the first argument is not a valid object name; + instead exit with non-zero status silently. + SHA-1s for valid object names are printed to stdout on success. + +--sq:: + Usually the output is made one line per flag and + parameter. This option makes output a single line, + properly quoted for consumption by shell. Useful when + you expect your parameter to contain whitespaces and + newlines (e.g. when using pickaxe `-S` with + 'git diff-{asterisk}'). In contrast to the `--sq-quote` option, + the command input is still interpreted as usual. + +--not:: + When showing object names, prefix them with '{caret}' and + strip '{caret}' prefix from the object names that already have + one. + +--abbrev-ref[=(strict|loose)]:: + A non-ambiguous short name of the objects name. + The option core.warnAmbiguousRefs is used to select the strict + abbreviation mode. + +--short:: +--short=number:: + Instead of outputting the full SHA-1 values of object names try to + abbreviate them to a shorter unique name. When no length is specified + 7 is used. The minimum length is 4. + +--symbolic:: + Usually the object names are output in SHA-1 form (with + possible '{caret}' prefix); this option makes them output in a + form as close to the original input as possible. + +--symbolic-full-name:: + This is similar to --symbolic, but it omits input that + are not refs (i.e. branch or tag names; or more + explicitly disambiguating "heads/master" form, when you + want to name the "master" branch when there is an + unfortunately named tag "master"), and show them as full + refnames (e.g. "refs/heads/master"). + +Options for Objects +~~~~~~~~~~~~~~~~~~~ + +--all:: + Show all refs found in `refs/`. + +--branches[=pattern]:: +--tags[=pattern]:: +--remotes[=pattern]:: + Show all branches, tags, or remote-tracking branches, + respectively (i.e., refs found in `refs/heads`, + `refs/tags`, or `refs/remotes`, respectively). ++ +If a `pattern` is given, only refs matching the given shell glob are +shown. If the pattern does not contain a globbing character (`?`, +`*`, or `[`), it is turned into a prefix match by appending `/*`. + +--glob=pattern:: + Show all refs matching the shell glob pattern `pattern`. If + the pattern does not start with `refs/`, this is automatically + prepended. If the pattern does not contain a globbing + character (`?`, `*`, or `[`), it is turned into a prefix + match by appending `/*`. + +--exclude=<glob-pattern>:: + Do not include refs matching '<glob-pattern>' that the next `--all`, + `--branches`, `--tags`, `--remotes`, or `--glob` would otherwise + consider. Repetitions of this option accumulate exclusion patterns + up to the next `--all`, `--branches`, `--tags`, `--remotes`, or + `--glob` option (other options or arguments do not clear + accumulated patterns). ++ +The patterns given should not begin with `refs/heads`, `refs/tags`, or +`refs/remotes` when applied to `--branches`, `--tags`, or `--remotes`, +respectively, and they must begin with `refs/` when applied to `--glob` +or `--all`. If a trailing '/{asterisk}' is intended, it must be given +explicitly. + +--disambiguate=<prefix>:: + Show every object whose name begins with the given prefix. + The <prefix> must be at least 4 hexadecimal digits long to + avoid listing each and every object in the repository by + mistake. + +Options for Files +~~~~~~~~~~~~~~~~~ + +--local-env-vars:: + List the GIT_* environment variables that are local to the + repository (e.g. GIT_DIR or GIT_WORK_TREE, but not GIT_EDITOR). + Only the names of the variables are listed, not their value, + even if they are set. + +--git-dir:: + Show `$GIT_DIR` if defined. Otherwise show the path to + the .git directory. The path shown, when relative, is + relative to the current working directory. ++ +If `$GIT_DIR` is not defined and the current directory +is not detected to lie in a Git repository or work tree +print a message to stderr and exit with nonzero status. + +--git-common-dir:: + Show `$GIT_COMMON_DIR` if defined, else `$GIT_DIR`. + +--is-inside-git-dir:: + When the current working directory is below the repository + directory print "true", otherwise "false". + +--is-inside-work-tree:: + When the current working directory is inside the work tree of the + repository print "true", otherwise "false". + +--is-bare-repository:: + When the repository is bare print "true", otherwise "false". + +--resolve-git-dir <path>:: + Check if <path> is a valid repository or a gitfile that + points at a valid repository, and print the location of the + repository. If <path> is a gitfile then the resolved path + to the real repository is printed. + +--git-path <path>:: + Resolve "$GIT_DIR/<path>" and takes other path relocation + variables such as $GIT_OBJECT_DIRECTORY, + $GIT_INDEX_FILE... into account. For example, if + $GIT_OBJECT_DIRECTORY is set to /foo/bar then "git rev-parse + --git-path objects/abc" returns /foo/bar/abc. + +--show-cdup:: + When the command is invoked from a subdirectory, show the + path of the top-level directory relative to the current + directory (typically a sequence of "../", or an empty string). + +--show-prefix:: + When the command is invoked from a subdirectory, show the + path of the current directory relative to the top-level + directory. + +--show-toplevel:: + Show the absolute path of the top-level directory. + +--shared-index-path:: + Show the path to the shared index file in split index mode, or + empty if not in split-index mode. + +Other Options +~~~~~~~~~~~~~ + +--since=datestring:: +--after=datestring:: + Parse the date string, and output the corresponding + --max-age= parameter for 'git rev-list'. + +--until=datestring:: +--before=datestring:: + Parse the date string, and output the corresponding + --min-age= parameter for 'git rev-list'. + +<args>...:: + Flags and parameters to be parsed. + + +include::revisions.txt[] + +PARSEOPT +-------- + +In `--parseopt` mode, 'git rev-parse' helps massaging options to bring to shell +scripts the same facilities C builtins have. It works as an option normalizer +(e.g. splits single switches aggregate values), a bit like `getopt(1)` does. + +It takes on the standard input the specification of the options to parse and +understand, and echoes on the standard output a string suitable for `sh(1)` `eval` +to replace the arguments with normalized ones. In case of error, it outputs +usage on the standard error stream, and exits with code 129. + +Note: Make sure you quote the result when passing it to `eval`. See +below for an example. + +Input Format +~~~~~~~~~~~~ + +'git rev-parse --parseopt' input format is fully text based. It has two parts, +separated by a line that contains only `--`. The lines before the separator +(should be one or more) are used for the usage. +The lines after the separator describe the options. + +Each line of options has this format: + +------------ +<opt-spec><flags>*<arg-hint>? SP+ help LF +------------ + +`<opt-spec>`:: + its format is the short option character, then the long option name + separated by a comma. Both parts are not required, though at least one + is necessary. May not contain any of the `<flags>` characters. + `h,help`, `dry-run` and `f` are examples of correct `<opt-spec>`. + +`<flags>`:: + `<flags>` are of `*`, `=`, `?` or `!`. + * Use `=` if the option takes an argument. + + * Use `?` to mean that the option takes an optional argument. You + probably want to use the `--stuck-long` mode to be able to + unambiguously parse the optional argument. + + * Use `*` to mean that this option should not be listed in the usage + generated for the `-h` argument. It's shown for `--help-all` as + documented in linkgit:gitcli[7]. + + * Use `!` to not make the corresponding negated long option available. + +`<arg-hint>`:: + `<arg-hint>`, if specified, is used as a name of the argument in the + help output, for options that take arguments. `<arg-hint>` is + terminated by the first whitespace. It is customary to use a + dash to separate words in a multi-word argument hint. + +The remainder of the line, after stripping the spaces, is used +as the help associated to the option. + +Blank lines are ignored, and lines that don't match this specification are used +as option group headers (start the line with a space to create such +lines on purpose). + +Example +~~~~~~~ + +------------ +OPTS_SPEC="\ +some-command [options] <args>... + +some-command does foo and bar! +-- +h,help show the help + +foo some nifty option --foo +bar= some cool option --bar with an argument +baz=arg another cool option --baz with a named argument +qux?path qux may take a path argument but has meaning by itself + + An option group Header +C? option C with an optional argument" + +eval "$(echo "$OPTS_SPEC" | git rev-parse --parseopt -- "$@" || echo exit $?)" +------------ + + +Usage text +~~~~~~~~~~ + +When `"$@"` is `-h` or `--help` in the above example, the following +usage text would be shown: + +------------ +usage: some-command [options] <args>... + + some-command does foo and bar! + + -h, --help show the help + --foo some nifty option --foo + --bar ... some cool option --bar with an argument + --baz <arg> another cool option --baz with a named argument + --qux[=<path>] qux may take a path argument but has meaning by itself + +An option group Header + -C[...] option C with an optional argument +------------ + +SQ-QUOTE +-------- + +In `--sq-quote` mode, 'git rev-parse' echoes on the standard output a +single line suitable for `sh(1)` `eval`. This line is made by +normalizing the arguments following `--sq-quote`. Nothing other than +quoting the arguments is done. + +If you want command input to still be interpreted as usual by +'git rev-parse' before the output is shell quoted, see the `--sq` +option. + +Example +~~~~~~~ + +------------ +$ cat >your-git-script.sh <<\EOF +#!/bin/sh +args=$(git rev-parse --sq-quote "$@") # quote user-supplied arguments +command="git frotz -n24 $args" # and use it inside a handcrafted + # command line +eval "$command" +EOF + +$ sh your-git-script.sh "a b'c" +------------ + +EXAMPLES +-------- + +* Print the object name of the current commit: ++ +------------ +$ git rev-parse --verify HEAD +------------ + +* Print the commit object name from the revision in the $REV shell variable: ++ +------------ +$ git rev-parse --verify $REV^{commit} +------------ ++ +This will error out if $REV is empty or not a valid revision. + +* Similar to above: ++ +------------ +$ git rev-parse --default master --verify $REV +------------ ++ +but if $REV is empty, the commit object name from master will be printed. + +GIT +--- +Part of the linkgit:git[1] suite diff --git a/Documentation/git-revert.txt b/Documentation/git-revert.txt new file mode 100644 index 0000000..573616a --- /dev/null +++ b/Documentation/git-revert.txt @@ -0,0 +1,129 @@ +git-revert(1) +============= + +NAME +---- +git-revert - Revert some existing commits + +SYNOPSIS +-------- +[verse] +'git revert' [--[no-]edit] [-n] [-m parent-number] [-s] [-S[<keyid>]] <commit>... +'git revert' --continue +'git revert' --quit +'git revert' --abort + +DESCRIPTION +----------- + +Given one or more existing commits, revert the changes that the +related patches introduce, and record some new commits that record +them. This requires your working tree to be clean (no modifications +from the HEAD commit). + +Note: 'git revert' is used to record some new commits to reverse the +effect of some earlier commits (often only a faulty one). If you want to +throw away all uncommitted changes in your working directory, you +should see linkgit:git-reset[1], particularly the '--hard' option. If +you want to extract specific files as they were in another commit, you +should see linkgit:git-checkout[1], specifically the `git checkout +<commit> -- <filename>` syntax. Take care with these alternatives as +both will discard uncommitted changes in your working directory. + +OPTIONS +------- +<commit>...:: + Commits to revert. + For a more complete list of ways to spell commit names, see + linkgit:gitrevisions[7]. + Sets of commits can also be given but no traversal is done by + default, see linkgit:git-rev-list[1] and its '--no-walk' + option. + +-e:: +--edit:: + With this option, 'git revert' will let you edit the commit + message prior to committing the revert. This is the default if + you run the command from a terminal. + +-m parent-number:: +--mainline parent-number:: + Usually you cannot revert a merge because you do not know which + side of the merge should be considered the mainline. This + option specifies the parent number (starting from 1) of + the mainline and allows revert to reverse the change + relative to the specified parent. ++ +Reverting a merge commit declares that you will never want the tree changes +brought in by the merge. As a result, later merges will only bring in tree +changes introduced by commits that are not ancestors of the previously +reverted merge. This may or may not be what you want. ++ +See the link:howto/revert-a-faulty-merge.html[revert-a-faulty-merge How-To] for +more details. + +--no-edit:: + With this option, 'git revert' will not start the commit + message editor. + +-n:: +--no-commit:: + Usually the command automatically creates some commits with + commit log messages stating which commits were + reverted. This flag applies the changes necessary + to revert the named commits to your working tree + and the index, but does not make the commits. In addition, + when this option is used, your index does not have to match + the HEAD commit. The revert is done against the + beginning state of your index. ++ +This is useful when reverting more than one commits' +effect to your index in a row. + +-S[<keyid>]:: +--gpg-sign[=<keyid>]:: + GPG-sign commits. The `keyid` argument is optional and + defaults to the committer identity; if specified, it must be + stuck to the option without a space. + +-s:: +--signoff:: + Add Signed-off-by line at the end of the commit message. + See the signoff option in linkgit:git-commit[1] for more information. + +--strategy=<strategy>:: + Use the given merge strategy. Should only be used once. + See the MERGE STRATEGIES section in linkgit:git-merge[1] + for details. + +-X<option>:: +--strategy-option=<option>:: + Pass the merge strategy-specific option through to the + merge strategy. See linkgit:git-merge[1] for details. + +SEQUENCER SUBCOMMANDS +--------------------- +include::sequencer.txt[] + +EXAMPLES +-------- +`git revert HEAD~3`:: + + Revert the changes specified by the fourth last commit in HEAD + and create a new commit with the reverted changes. + +`git revert -n master~5..master~2`:: + + Revert the changes done by commits from the fifth last commit + in master (included) to the third last commit in master + (included), but do not create any commit with the reverted + changes. The revert only modifies the working tree and the + index. + +SEE ALSO +-------- +linkgit:git-cherry-pick[1] + +GIT +--- +Part of the linkgit:git[1] suite diff --git a/Documentation/git-rm.txt b/Documentation/git-rm.txt new file mode 100644 index 0000000..f1efc11 --- /dev/null +++ b/Documentation/git-rm.txt @@ -0,0 +1,188 @@ +git-rm(1) +========= + +NAME +---- +git-rm - Remove files from the working tree and from the index + +SYNOPSIS +-------- +[verse] +'git rm' [-f | --force] [-n] [-r] [--cached] [--ignore-unmatch] [--quiet] [--] <file>... + +DESCRIPTION +----------- +Remove files from the index, or from the working tree and the index. +`git rm` will not remove a file from just your working directory. +(There is no option to remove a file only from the working tree +and yet keep it in the index; use `/bin/rm` if you want to do that.) +The files being removed have to be identical to the tip of the branch, +and no updates to their contents can be staged in the index, +though that default behavior can be overridden with the `-f` option. +When `--cached` is given, the staged content has to +match either the tip of the branch or the file on disk, +allowing the file to be removed from just the index. + + +OPTIONS +------- +<file>...:: + Files to remove. Fileglobs (e.g. `*.c`) can be given to + remove all matching files. If you want Git to expand + file glob characters, you may need to shell-escape them. + A leading directory name + (e.g. `dir` to remove `dir/file1` and `dir/file2`) can be + given to remove all files in the directory, and recursively + all sub-directories, + but this requires the `-r` option to be explicitly given. + +-f:: +--force:: + Override the up-to-date check. + +-n:: +--dry-run:: + Don't actually remove any file(s). Instead, just show + if they exist in the index and would otherwise be removed + by the command. + +-r:: + Allow recursive removal when a leading directory name is + given. + +\--:: + This option can be used to separate command-line options from + the list of files, (useful when filenames might be mistaken + for command-line options). + +--cached:: + Use this option to unstage and remove paths only from the index. + Working tree files, whether modified or not, will be + left alone. + +--ignore-unmatch:: + Exit with a zero status even if no files matched. + +-q:: +--quiet:: + `git rm` normally outputs one line (in the form of an `rm` command) + for each file removed. This option suppresses that output. + + +DISCUSSION +---------- + +The <file> list given to the command can be exact pathnames, +file glob patterns, or leading directory names. The command +removes only the paths that are known to Git. Giving the name of +a file that you have not told Git about does not remove that file. + +File globbing matches across directory boundaries. Thus, given +two directories `d` and `d2`, there is a difference between +using `git rm 'd*'` and `git rm 'd/*'`, as the former will +also remove all of directory `d2`. + +REMOVING FILES THAT HAVE DISAPPEARED FROM THE FILESYSTEM +-------------------------------------------------------- +There is no option for `git rm` to remove from the index only +the paths that have disappeared from the filesystem. However, +depending on the use case, there are several ways that can be +done. + +Using ``git commit -a'' +~~~~~~~~~~~~~~~~~~~~~~~ +If you intend that your next commit should record all modifications +of tracked files in the working tree and record all removals of +files that have been removed from the working tree with `rm` +(as opposed to `git rm`), use `git commit -a`, as it will +automatically notice and record all removals. You can also have a +similar effect without committing by using `git add -u`. + +Using ``git add -A'' +~~~~~~~~~~~~~~~~~~~~ +When accepting a new code drop for a vendor branch, you probably +want to record both the removal of paths and additions of new paths +as well as modifications of existing paths. + +Typically you would first remove all tracked files from the working +tree using this command: + +---------------- +git ls-files -z | xargs -0 rm -f +---------------- + +and then untar the new code in the working tree. Alternately +you could 'rsync' the changes into the working tree. + +After that, the easiest way to record all removals, additions, and +modifications in the working tree is: + +---------------- +git add -A +---------------- + +See linkgit:git-add[1]. + +Other ways +~~~~~~~~~~ +If all you really want to do is to remove from the index the files +that are no longer present in the working tree (perhaps because +your working tree is dirty so that you cannot use `git commit -a`), +use the following command: + +---------------- +git diff --name-only --diff-filter=D -z | xargs -0 git rm --cached +---------------- + +SUBMODULES +---------- +Only submodules using a gitfile (which means they were cloned +with a Git version 1.7.8 or newer) will be removed from the work +tree, as their repository lives inside the .git directory of the +superproject. If a submodule (or one of those nested inside it) +still uses a .git directory, `git rm` will fail - no matter if forced +or not - to protect the submodule's history. If it exists the +submodule.<name> section in the linkgit:gitmodules[5] file will also +be removed and that file will be staged (unless --cached or -n are used). + +A submodule is considered up-to-date when the HEAD is the same as +recorded in the index, no tracked files are modified and no untracked +files that aren't ignored are present in the submodules work tree. +Ignored files are deemed expendable and won't stop a submodule's work +tree from being removed. + +If you only want to remove the local checkout of a submodule from your +work tree without committing the removal, +use linkgit:git-submodule[1] `deinit` instead. + +EXAMPLES +-------- +`git rm Documentation/\*.txt`:: + Removes all `*.txt` files from the index that are under the + `Documentation` directory and any of its subdirectories. ++ +Note that the asterisk `*` is quoted from the shell in this +example; this lets Git, and not the shell, expand the pathnames +of files and subdirectories under the `Documentation/` directory. + +`git rm -f git-*.sh`:: + Because this example lets the shell expand the asterisk + (i.e. you are listing the files explicitly), it + does not remove `subdir/git-foo.sh`. + +BUGS +---- +Each time a superproject update removes a populated submodule +(e.g. when switching between commits before and after the removal) a +stale submodule checkout will remain in the old location. Removing the +old directory is only safe when it uses a gitfile, as otherwise the +history of the submodule will be deleted too. This step will be +obsolete when recursive submodule update has been implemented. + +SEE ALSO +-------- +linkgit:git-add[1] + +GIT +--- +Part of the linkgit:git[1] suite diff --git a/Documentation/git-send-email.txt b/Documentation/git-send-email.txt new file mode 100644 index 0000000..771a7b5 --- /dev/null +++ b/Documentation/git-send-email.txt @@ -0,0 +1,469 @@ +git-send-email(1) +================= + +NAME +---- +git-send-email - Send a collection of patches as emails + + +SYNOPSIS +-------- +[verse] +'git send-email' [options] <file|directory|rev-list options>... +'git send-email' --dump-aliases + + +DESCRIPTION +----------- +Takes the patches given on the command line and emails them out. +Patches can be specified as files, directories (which will send all +files in the directory), or directly as a revision list. In the +last case, any format accepted by linkgit:git-format-patch[1] can +be passed to git send-email. + +The header of the email is configurable via command-line options. If not +specified on the command line, the user will be prompted with a ReadLine +enabled interface to provide the necessary information. + +There are two formats accepted for patch files: + +1. mbox format files ++ +This is what linkgit:git-format-patch[1] generates. Most headers and MIME +formatting are ignored. + +2. The original format used by Greg Kroah-Hartman's 'send_lots_of_email.pl' +script ++ +This format expects the first line of the file to contain the "Cc:" value +and the "Subject:" of the message as the second line. + + +OPTIONS +------- + +Composing +~~~~~~~~~ + +--annotate:: + Review and edit each patch you're about to send. Default is the value + of 'sendemail.annotate'. See the CONFIGURATION section for + 'sendemail.multiEdit'. + +--bcc=<address>,...:: + Specify a "Bcc:" value for each email. Default is the value of + 'sendemail.bcc'. ++ +This option may be specified multiple times. + +--cc=<address>,...:: + Specify a starting "Cc:" value for each email. + Default is the value of 'sendemail.cc'. ++ +This option may be specified multiple times. + +--compose:: + Invoke a text editor (see GIT_EDITOR in linkgit:git-var[1]) + to edit an introductory message for the patch series. ++ +When '--compose' is used, git send-email will use the From, Subject, and +In-Reply-To headers specified in the message. If the body of the message +(what you type after the headers and a blank line) only contains blank +(or Git: prefixed) lines, the summary won't be sent, but From, Subject, +and In-Reply-To headers will be used unless they are removed. ++ +Missing From or In-Reply-To headers will be prompted for. ++ +See the CONFIGURATION section for 'sendemail.multiEdit'. + +--from=<address>:: + Specify the sender of the emails. If not specified on the command line, + the value of the 'sendemail.from' configuration option is used. If + neither the command-line option nor 'sendemail.from' are set, then the + user will be prompted for the value. The default for the prompt will be + the value of GIT_AUTHOR_IDENT, or GIT_COMMITTER_IDENT if that is not + set, as returned by "git var -l". + +--in-reply-to=<identifier>:: + Make the first mail (or all the mails with `--no-thread`) appear as a + reply to the given Message-Id, which avoids breaking threads to + provide a new patch series. + The second and subsequent emails will be sent as replies according to + the `--[no]-chain-reply-to` setting. ++ +So for example when `--thread` and `--no-chain-reply-to` are specified, the +second and subsequent patches will be replies to the first one like in the +illustration below where `[PATCH v2 0/3]` is in reply to `[PATCH 0/2]`: ++ + [PATCH 0/2] Here is what I did... + [PATCH 1/2] Clean up and tests + [PATCH 2/2] Implementation + [PATCH v2 0/3] Here is a reroll + [PATCH v2 1/3] Clean up + [PATCH v2 2/3] New tests + [PATCH v2 3/3] Implementation ++ +Only necessary if --compose is also set. If --compose +is not set, this will be prompted for. + +--subject=<string>:: + Specify the initial subject of the email thread. + Only necessary if --compose is also set. If --compose + is not set, this will be prompted for. + +--to=<address>,...:: + Specify the primary recipient of the emails generated. Generally, this + will be the upstream maintainer of the project involved. Default is the + value of the 'sendemail.to' configuration value; if that is unspecified, + and --to-cmd is not specified, this will be prompted for. ++ +This option may be specified multiple times. + +--8bit-encoding=<encoding>:: + When encountering a non-ASCII message or subject that does not + declare its encoding, add headers/quoting to indicate it is + encoded in <encoding>. Default is the value of the + 'sendemail.assume8bitEncoding'; if that is unspecified, this + will be prompted for if any non-ASCII files are encountered. ++ +Note that no attempts whatsoever are made to validate the encoding. + +--compose-encoding=<encoding>:: + Specify encoding of compose message. Default is the value of the + 'sendemail.composeencoding'; if that is unspecified, UTF-8 is assumed. + +--transfer-encoding=(7bit|8bit|quoted-printable|base64):: + Specify the transfer encoding to be used to send the message over SMTP. + 7bit will fail upon encountering a non-ASCII message. quoted-printable + can be useful when the repository contains files that contain carriage + returns, but makes the raw patch email file (as saved from a MUA) much + harder to inspect manually. base64 is even more fool proof, but also + even more opaque. Default is the value of the 'sendemail.transferEncoding' + configuration value; if that is unspecified, git will use 8bit and not + add a Content-Transfer-Encoding header. + +--xmailer:: +--no-xmailer:: + Add (or prevent adding) the "X-Mailer:" header. By default, + the header is added, but it can be turned off by setting the + `sendemail.xmailer` configuration variable to `false`. + +Sending +~~~~~~~ + +--envelope-sender=<address>:: + Specify the envelope sender used to send the emails. + This is useful if your default address is not the address that is + subscribed to a list. In order to use the 'From' address, set the + value to "auto". If you use the sendmail binary, you must have + suitable privileges for the -f parameter. Default is the value of the + 'sendemail.envelopeSender' configuration variable; if that is + unspecified, choosing the envelope sender is left to your MTA. + +--smtp-encryption=<encryption>:: + Specify the encryption to use, either 'ssl' or 'tls'. Any other + value reverts to plain SMTP. Default is the value of + 'sendemail.smtpEncryption'. + +--smtp-domain=<FQDN>:: + Specifies the Fully Qualified Domain Name (FQDN) used in the + HELO/EHLO command to the SMTP server. Some servers require the + FQDN to match your IP address. If not set, git send-email attempts + to determine your FQDN automatically. Default is the value of + 'sendemail.smtpDomain'. + +--smtp-auth=<mechanisms>:: + Whitespace-separated list of allowed SMTP-AUTH mechanisms. This setting + forces using only the listed mechanisms. Example: ++ +------ +$ git send-email --smtp-auth="PLAIN LOGIN GSSAPI" ... +------ ++ +If at least one of the specified mechanisms matches the ones advertised by the +SMTP server and if it is supported by the utilized SASL library, the mechanism +is used for authentication. If neither 'sendemail.smtpAuth' nor '--smtp-auth' +is specified, all mechanisms supported by the SASL library can be used. + +--smtp-pass[=<password>]:: + Password for SMTP-AUTH. The argument is optional: If no + argument is specified, then the empty string is used as + the password. Default is the value of 'sendemail.smtpPass', + however '--smtp-pass' always overrides this value. ++ +Furthermore, passwords need not be specified in configuration files +or on the command line. If a username has been specified (with +'--smtp-user' or a 'sendemail.smtpUser'), but no password has been +specified (with '--smtp-pass' or 'sendemail.smtpPass'), then +a password is obtained using 'git-credential'. + +--smtp-server=<host>:: + If set, specifies the outgoing SMTP server to use (e.g. + `smtp.example.com` or a raw IP address). Alternatively it can + specify a full pathname of a sendmail-like program instead; + the program must support the `-i` option. Default value can + be specified by the 'sendemail.smtpServer' configuration + option; the built-in default is `/usr/sbin/sendmail` or + `/usr/lib/sendmail` if such program is available, or + `localhost` otherwise. + +--smtp-server-port=<port>:: + Specifies a port different from the default port (SMTP + servers typically listen to smtp port 25, but may also listen to + submission port 587, or the common SSL smtp port 465); + symbolic port names (e.g. "submission" instead of 587) + are also accepted. The port can also be set with the + 'sendemail.smtpServerPort' configuration variable. + +--smtp-server-option=<option>:: + If set, specifies the outgoing SMTP server option to use. + Default value can be specified by the 'sendemail.smtpServerOption' + configuration option. ++ +The --smtp-server-option option must be repeated for each option you want +to pass to the server. Likewise, different lines in the configuration files +must be used for each option. + +--smtp-ssl:: + Legacy alias for '--smtp-encryption ssl'. + +--smtp-ssl-cert-path:: + Path to a store of trusted CA certificates for SMTP SSL/TLS + certificate validation (either a directory that has been processed + by 'c_rehash', or a single file containing one or more PEM format + certificates concatenated together: see verify(1) -CAfile and + -CApath for more information on these). Set it to an empty string + to disable certificate verification. Defaults to the value of the + 'sendemail.smtpsslcertpath' configuration variable, if set, or the + backing SSL library's compiled-in default otherwise (which should + be the best choice on most platforms). + +--smtp-user=<user>:: + Username for SMTP-AUTH. Default is the value of 'sendemail.smtpUser'; + if a username is not specified (with '--smtp-user' or 'sendemail.smtpUser'), + then authentication is not attempted. + +--smtp-debug=0|1:: + Enable (1) or disable (0) debug output. If enabled, SMTP + commands and replies will be printed. Useful to debug TLS + connection and authentication problems. + +Automating +~~~~~~~~~~ + +--to-cmd=<command>:: + Specify a command to execute once per patch file which + should generate patch file specific "To:" entries. + Output of this command must be single email address per line. + Default is the value of 'sendemail.tocmd' configuration value. + +--cc-cmd=<command>:: + Specify a command to execute once per patch file which + should generate patch file specific "Cc:" entries. + Output of this command must be single email address per line. + Default is the value of 'sendemail.ccCmd' configuration value. + +--[no-]chain-reply-to:: + If this is set, each email will be sent as a reply to the previous + email sent. If disabled with "--no-chain-reply-to", all emails after + the first will be sent as replies to the first email sent. When using + this, it is recommended that the first file given be an overview of the + entire patch series. Disabled by default, but the 'sendemail.chainReplyTo' + configuration variable can be used to enable it. + +--identity=<identity>:: + A configuration identity. When given, causes values in the + 'sendemail.<identity>' subsection to take precedence over + values in the 'sendemail' section. The default identity is + the value of 'sendemail.identity'. + +--[no-]signed-off-by-cc:: + If this is set, add emails found in Signed-off-by: or Cc: lines to the + cc list. Default is the value of 'sendemail.signedoffbycc' configuration + value; if that is unspecified, default to --signed-off-by-cc. + +--[no-]cc-cover:: + If this is set, emails found in Cc: headers in the first patch of + the series (typically the cover letter) are added to the cc list + for each email set. Default is the value of 'sendemail.cccover' + configuration value; if that is unspecified, default to --no-cc-cover. + +--[no-]to-cover:: + If this is set, emails found in To: headers in the first patch of + the series (typically the cover letter) are added to the to list + for each email set. Default is the value of 'sendemail.tocover' + configuration value; if that is unspecified, default to --no-to-cover. + +--suppress-cc=<category>:: + Specify an additional category of recipients to suppress the + auto-cc of: ++ +-- +- 'author' will avoid including the patch author +- 'self' will avoid including the sender +- 'cc' will avoid including anyone mentioned in Cc lines in the patch header + except for self (use 'self' for that). +- 'bodycc' will avoid including anyone mentioned in Cc lines in the + patch body (commit message) except for self (use 'self' for that). +- 'sob' will avoid including anyone mentioned in Signed-off-by lines except + for self (use 'self' for that). +- 'cccmd' will avoid running the --cc-cmd. +- 'body' is equivalent to 'sob' + 'bodycc' +- 'all' will suppress all auto cc values. +-- ++ +Default is the value of 'sendemail.suppresscc' configuration value; if +that is unspecified, default to 'self' if --suppress-from is +specified, as well as 'body' if --no-signed-off-cc is specified. + +--[no-]suppress-from:: + If this is set, do not add the From: address to the cc: list. + Default is the value of 'sendemail.suppressFrom' configuration + value; if that is unspecified, default to --no-suppress-from. + +--[no-]thread:: + If this is set, the In-Reply-To and References headers will be + added to each email sent. Whether each mail refers to the + previous email (`deep` threading per 'git format-patch' + wording) or to the first email (`shallow` threading) is + governed by "--[no-]chain-reply-to". ++ +If disabled with "--no-thread", those headers will not be added +(unless specified with --in-reply-to). Default is the value of the +'sendemail.thread' configuration value; if that is unspecified, +default to --thread. ++ +It is up to the user to ensure that no In-Reply-To header already +exists when 'git send-email' is asked to add it (especially note that +'git format-patch' can be configured to do the threading itself). +Failure to do so may not produce the expected result in the +recipient's MUA. + + +Administering +~~~~~~~~~~~~~ + +--confirm=<mode>:: + Confirm just before sending: ++ +-- +- 'always' will always confirm before sending +- 'never' will never confirm before sending +- 'cc' will confirm before sending when send-email has automatically + added addresses from the patch to the Cc list +- 'compose' will confirm before sending the first message when using --compose. +- 'auto' is equivalent to 'cc' + 'compose' +-- ++ +Default is the value of 'sendemail.confirm' configuration value; if that +is unspecified, default to 'auto' unless any of the suppress options +have been specified, in which case default to 'compose'. + +--dry-run:: + Do everything except actually send the emails. + +--[no-]format-patch:: + When an argument may be understood either as a reference or as a file name, + choose to understand it as a format-patch argument ('--format-patch') + or as a file name ('--no-format-patch'). By default, when such a conflict + occurs, git send-email will fail. + +--quiet:: + Make git-send-email less verbose. One line per email should be + all that is output. + +--[no-]validate:: + Perform sanity checks on patches. + Currently, validation means the following: ++ +-- + * Warn of patches that contain lines longer than 998 characters; this + is due to SMTP limits as described by http://www.ietf.org/rfc/rfc2821.txt. +-- ++ +Default is the value of 'sendemail.validate'; if this is not set, +default to '--validate'. + +--force:: + Send emails even if safety checks would prevent it. + + +Information +~~~~~~~~~~~ + +--dump-aliases:: + Instead of the normal operation, dump the shorthand alias names from + the configured alias file(s), one per line in alphabetical order. Note, + this only includes the alias name and not its expanded email addresses. + See 'sendemail.aliasesfile' for more information about aliases. + + +CONFIGURATION +------------- + +sendemail.aliasesFile:: + To avoid typing long email addresses, point this to one or more + email aliases files. You must also supply 'sendemail.aliasFileType'. + +sendemail.aliasFileType:: + Format of the file(s) specified in sendemail.aliasesFile. Must be + one of 'mutt', 'mailrc', 'pine', 'elm', or 'gnus', or 'sendmail'. ++ +What an alias file in each format looks like can be found in +the documentation of the email program of the same name. The +differences and limitations from the standard formats are +described below: ++ +-- +sendmail;; +* Quoted aliases and quoted addresses are not supported: lines that + contain a `"` symbol are ignored. +* Redirection to a file (`/path/name`) or pipe (`|command`) is not + supported. +* File inclusion (`:include: /path/name`) is not supported. +* Warnings are printed on the standard error output for any + explicitly unsupported constructs, and any other lines that are not + recognized by the parser. +-- + +sendemail.multiEdit:: + If true (default), a single editor instance will be spawned to edit + files you have to edit (patches when '--annotate' is used, and the + summary when '--compose' is used). If false, files will be edited one + after the other, spawning a new editor each time. + +sendemail.confirm:: + Sets the default for whether to confirm before sending. Must be + one of 'always', 'never', 'cc', 'compose', or 'auto'. See '--confirm' + in the previous section for the meaning of these values. + +EXAMPLE +------- +Use gmail as the smtp server +~~~~~~~~~~~~~~~~~~~~~~~~~~~~ +To use 'git send-email' to send your patches through the GMail SMTP server, +edit ~/.gitconfig to specify your account settings: + + [sendemail] + smtpEncryption = tls + smtpServer = smtp.gmail.com + smtpUser = yourname@gmail.com + smtpServerPort = 587 + +Once your commits are ready to be sent to the mailing list, run the +following commands: + + $ git format-patch --cover-letter -M origin/master -o outgoing/ + $ edit outgoing/0000-* + $ git send-email outgoing/* + +Note: the following perl modules are required + Net::SMTP::SSL, MIME::Base64 and Authen::SASL + +SEE ALSO +-------- +linkgit:git-format-patch[1], linkgit:git-imap-send[1], mbox(5) + +GIT +--- +Part of the linkgit:git[1] suite diff --git a/Documentation/git-send-pack.txt b/Documentation/git-send-pack.txt new file mode 100644 index 0000000..6aa91e8 --- /dev/null +++ b/Documentation/git-send-pack.txt @@ -0,0 +1,150 @@ +git-send-pack(1) +================ + +NAME +---- +git-send-pack - Push objects over Git protocol to another repository + + +SYNOPSIS +-------- +[verse] +'git send-pack' [--all] [--dry-run] [--force] [--receive-pack=<git-receive-pack>] + [--verbose] [--thin] [--atomic] + [--[no-]signed|--sign=(true|false|if-asked)] + [<host>:]<directory> [<ref>...] + +DESCRIPTION +----------- +Usually you would want to use 'git push', which is a +higher-level wrapper of this command, instead. See linkgit:git-push[1]. + +Invokes 'git-receive-pack' on a possibly remote repository, and +updates it from the current repository, sending named refs. + + +OPTIONS +------- +--receive-pack=<git-receive-pack>:: + Path to the 'git-receive-pack' program on the remote + end. Sometimes useful when pushing to a remote + repository over ssh, and you do not have the program in + a directory on the default $PATH. + +--exec=<git-receive-pack>:: + Same as --receive-pack=<git-receive-pack>. + +--all:: + Instead of explicitly specifying which refs to update, + update all heads that locally exist. + +--stdin:: + Take the list of refs from stdin, one per line. If there + are refs specified on the command line in addition to this + option, then the refs from stdin are processed after those + on the command line. ++ +If '--stateless-rpc' is specified together with this option then +the list of refs must be in packet format (pkt-line). Each ref must +be in a separate packet, and the list must end with a flush packet. + +--dry-run:: + Do everything except actually send the updates. + +--force:: + Usually, the command refuses to update a remote ref that + is not an ancestor of the local ref used to overwrite it. + This flag disables the check. What this means is that + the remote repository can lose commits; use it with + care. + +--verbose:: + Run verbosely. + +--thin:: + Send a "thin" pack, which records objects in deltified form based + on objects not included in the pack to reduce network traffic. + +--atomic:: + Use an atomic transaction for updating the refs. If any of the refs + fails to update then the entire push will fail without changing any + refs. + +--[no-]signed:: +--sign=(true|false|if-asked):: + GPG-sign the push request to update refs on the receiving + side, to allow it to be checked by the hooks and/or be + logged. If `false` or `--no-signed`, no signing will be + attempted. If `true` or `--signed`, the push will fail if the + server does not support signed pushes. If set to `if-asked`, + sign if and only if the server supports signed pushes. The push + will also fail if the actual call to `gpg --sign` fails. See + linkgit:git-receive-pack[1] for the details on the receiving end. + +<host>:: + A remote host to house the repository. When this + part is specified, 'git-receive-pack' is invoked via + ssh. + +<directory>:: + The repository to update. + +<ref>...:: + The remote refs to update. + + +Specifying the Refs +------------------- + +There are three ways to specify which refs to update on the +remote end. + +With '--all' flag, all refs that exist locally are transferred to +the remote side. You cannot specify any '<ref>' if you use +this flag. + +Without '--all' and without any '<ref>', the heads that exist +both on the local side and on the remote side are updated. + +When one or more '<ref>' are specified explicitly (whether on the +command line or via `--stdin`), it can be either a +single pattern, or a pair of such pattern separated by a colon +":" (this means that a ref name cannot have a colon in it). A +single pattern '<name>' is just a shorthand for '<name>:<name>'. + +Each pattern pair consists of the source side (before the colon) +and the destination side (after the colon). The ref to be +pushed is determined by finding a match that matches the source +side, and where it is pushed is determined by using the +destination side. The rules used to match a ref are the same +rules used by 'git rev-parse' to resolve a symbolic ref +name. See linkgit:git-rev-parse[1]. + + - It is an error if <src> does not match exactly one of the + local refs. + + - It is an error if <dst> matches more than one remote refs. + + - If <dst> does not match any remote ref, either + + * it has to start with "refs/"; <dst> is used as the + destination literally in this case. + + * <src> == <dst> and the ref that matched the <src> must not + exist in the set of remote refs; the ref matched <src> + locally is used as the name of the destination. + +Without '--force', the <src> ref is stored at the remote only if +<dst> does not exist, or <dst> is a proper subset (i.e. an +ancestor) of <src>. This check, known as "fast-forward check", +is performed in order to avoid accidentally overwriting the +remote ref and lose other peoples' commits from there. + +With '--force', the fast-forward check is disabled for all refs. + +Optionally, a <ref> parameter can be prefixed with a plus '+' sign +to disable the fast-forward check only on that ref. + +GIT +--- +Part of the linkgit:git[1] suite diff --git a/Documentation/git-sh-i18n--envsubst.txt b/Documentation/git-sh-i18n--envsubst.txt new file mode 100644 index 0000000..2ffaf93 --- /dev/null +++ b/Documentation/git-sh-i18n--envsubst.txt @@ -0,0 +1,36 @@ +git-sh-i18n{litdd}envsubst(1) +============================= + +NAME +---- +git-sh-i18n--envsubst - Git's own envsubst(1) for i18n fallbacks + +SYNOPSIS +-------- +[verse] +eval_gettext () { + printf "%s" "$1" | ( + export PATH $('git sh-i18n{litdd}envsubst' --variables "$1"); + 'git sh-i18n{litdd}envsubst' "$1" + ) +} + +DESCRIPTION +----------- + +This is not a command the end user would want to run. Ever. +This documentation is meant for people who are studying the +plumbing scripts and/or are writing new ones. + +'git sh-i18n{litdd}envsubst' is Git's stripped-down copy of the GNU +`envsubst(1)` program that comes with the GNU gettext package. It's +used internally by linkgit:git-sh-i18n[1] to interpolate the variables +passed to the `eval_gettext` function. + +No promises are made about the interface, or that this +program won't disappear without warning in the next version +of Git. Don't use it. + +GIT +--- +Part of the linkgit:git[1] suite diff --git a/Documentation/git-sh-i18n.txt b/Documentation/git-sh-i18n.txt new file mode 100644 index 0000000..60cf49c --- /dev/null +++ b/Documentation/git-sh-i18n.txt @@ -0,0 +1,43 @@ +git-sh-i18n(1) +============== + +NAME +---- +git-sh-i18n - Git's i18n setup code for shell scripts + +SYNOPSIS +-------- +[verse] +'. "$(git --exec-path)/git-sh-i18n"' + +DESCRIPTION +----------- + +This is not a command the end user would want to run. Ever. +This documentation is meant for people who are studying the +Porcelain-ish scripts and/or are writing new ones. + +The 'git sh-i18n scriptlet is designed to be sourced (using +`.`) by Git's porcelain programs implemented in shell +script. It provides wrappers for the GNU `gettext` and +`eval_gettext` functions accessible through the `gettext.sh` +script, and provides pass-through fallbacks on systems +without GNU gettext. + +FUNCTIONS +--------- + +gettext:: + Currently a dummy fall-through function implemented as a wrapper + around `printf(1)`. Will be replaced by a real gettext + implementation in a later version. + +eval_gettext:: + Currently a dummy fall-through function implemented as a wrapper + around `printf(1)` with variables expanded by the + linkgit:git-sh-i18n{litdd}envsubst[1] helper. Will be replaced by a + real gettext implementation in a later version. + +GIT +--- +Part of the linkgit:git[1] suite diff --git a/Documentation/git-sh-setup.txt b/Documentation/git-sh-setup.txt new file mode 100644 index 0000000..4f67c4c --- /dev/null +++ b/Documentation/git-sh-setup.txt @@ -0,0 +1,95 @@ +git-sh-setup(1) +=============== + +NAME +---- +git-sh-setup - Common Git shell script setup code + +SYNOPSIS +-------- +[verse] +'. "$(git --exec-path)/git-sh-setup"' + +DESCRIPTION +----------- + +This is not a command the end user would want to run. Ever. +This documentation is meant for people who are studying the +Porcelain-ish scripts and/or are writing new ones. + +The 'git sh-setup' scriptlet is designed to be sourced (using +`.`) by other shell scripts to set up some variables pointing at +the normal Git directories and a few helper shell functions. + +Before sourcing it, your script should set up a few variables; +`USAGE` (and `LONG_USAGE`, if any) is used to define message +given by `usage()` shell function. `SUBDIRECTORY_OK` can be set +if the script can run from a subdirectory of the working tree +(some commands do not). + +The scriptlet sets `GIT_DIR` and `GIT_OBJECT_DIRECTORY` shell +variables, but does *not* export them to the environment. + +FUNCTIONS +--------- + +die:: + exit after emitting the supplied error message to the + standard error stream. + +usage:: + die with the usage message. + +set_reflog_action:: + Set GIT_REFLOG_ACTION environment to a given string (typically + the name of the program) unless it is already set. Whenever + the script runs a `git` command that updates refs, a reflog + entry is created using the value of this string to leave the + record of what command updated the ref. + +git_editor:: + runs an editor of user's choice (GIT_EDITOR, core.editor, VISUAL or + EDITOR) on a given file, but error out if no editor is specified + and the terminal is dumb. + +is_bare_repository:: + outputs `true` or `false` to the standard output stream + to indicate if the repository is a bare repository + (i.e. without an associated working tree). + +cd_to_toplevel:: + runs chdir to the toplevel of the working tree. + +require_work_tree:: + checks if the current directory is within the working tree + of the repository, and otherwise dies. + +require_work_tree_exists:: + checks if the working tree associated with the repository + exists, and otherwise dies. Often done before calling + cd_to_toplevel, which is impossible to do if there is no + working tree. + +require_clean_work_tree <action> [<hint>]:: + checks that the working tree and index associated with the + repository have no uncommitted changes to tracked files. + Otherwise it emits an error message of the form `Cannot + <action>: <reason>. <hint>`, and dies. Example: ++ +---------------- +require_clean_work_tree rebase "Please commit or stash them." +---------------- + +get_author_ident_from_commit:: + outputs code for use with eval to set the GIT_AUTHOR_NAME, + GIT_AUTHOR_EMAIL and GIT_AUTHOR_DATE variables for a given commit. + +create_virtual_base:: + modifies the first file so only lines in common with the + second file remain. If there is insufficient common material, + then the first file is left empty. The result is suitable + as a virtual base input for a 3-way merge. + +GIT +--- +Part of the linkgit:git[1] suite diff --git a/Documentation/git-shell.txt b/Documentation/git-shell.txt new file mode 100644 index 0000000..e4bdd22 --- /dev/null +++ b/Documentation/git-shell.txt @@ -0,0 +1,90 @@ +git-shell(1) +============ + +NAME +---- +git-shell - Restricted login shell for Git-only SSH access + + +SYNOPSIS +-------- +[verse] +'chsh' -s $(command -v git-shell) <user> +'git clone' <user>`@localhost:/path/to/repo.git` +'ssh' <user>`@localhost` + +DESCRIPTION +----------- + +This is a login shell for SSH accounts to provide restricted Git access. +It permits execution only of server-side Git commands implementing the +pull/push functionality, plus custom commands present in a subdirectory +named `git-shell-commands` in the user's home directory. + +COMMANDS +-------- + +'git shell' accepts the following commands after the '-c' option: + +'git receive-pack <argument>':: +'git upload-pack <argument>':: +'git upload-archive <argument>':: + Call the corresponding server-side command to support + the client's 'git push', 'git fetch', or 'git archive --remote' + request. +'cvs server':: + Imitate a CVS server. See linkgit:git-cvsserver[1]. + +If a `~/git-shell-commands` directory is present, 'git shell' will +also handle other, custom commands by running +"`git-shell-commands/<command> <arguments>`" from the user's home +directory. + +INTERACTIVE USE +--------------- + +By default, the commands above can be executed only with the '-c' +option; the shell is not interactive. + +If a `~/git-shell-commands` directory is present, 'git shell' +can also be run interactively (with no arguments). If a `help` +command is present in the `git-shell-commands` directory, it is +run to provide the user with an overview of allowed actions. Then a +"git> " prompt is presented at which one can enter any of the +commands from the `git-shell-commands` directory, or `exit` to close +the connection. + +Generally this mode is used as an administrative interface to allow +users to list repositories they have access to, create, delete, or +rename repositories, or change repository descriptions and +permissions. + +If a `no-interactive-login` command exists, then it is run and the +interactive shell is aborted. + +EXAMPLE +------- + +To disable interactive logins, displaying a greeting instead: + +---------------- +$ chsh -s /usr/bin/git-shell +$ mkdir $HOME/git-shell-commands +$ cat >$HOME/git-shell-commands/no-interactive-login <<\EOF +#!/bin/sh +printf '%s\n' "Hi $USER! You've successfully authenticated, but I do not" +printf '%s\n' "provide interactive shell access." +exit 128 +EOF +$ chmod +x $HOME/git-shell-commands/no-interactive-login +---------------- + +SEE ALSO +-------- +ssh(1), +linkgit:git-daemon[1], +contrib/git-shell-commands/README + +GIT +--- +Part of the linkgit:git[1] suite diff --git a/Documentation/git-shortlog.txt b/Documentation/git-shortlog.txt new file mode 100644 index 0000000..31af7f2 --- /dev/null +++ b/Documentation/git-shortlog.txt @@ -0,0 +1,86 @@ +git-shortlog(1) +=============== + +NAME +---- +git-shortlog - Summarize 'git log' output + +SYNOPSIS +-------- +[verse] +git log --pretty=short | 'git shortlog' [<options>] +'git shortlog' [<options>] [<revision range>] [[\--] <path>...] + +DESCRIPTION +----------- +Summarizes 'git log' output in a format suitable for inclusion +in release announcements. Each commit will be grouped by author and title. + +Additionally, "[PATCH]" will be stripped from the commit description. + +If no revisions are passed on the command line and either standard input +is not a terminal or there is no current branch, 'git shortlog' will +output a summary of the log read from standard input, without +reference to the current repository. + +OPTIONS +------- + +-n:: +--numbered:: + Sort output according to the number of commits per author instead + of author alphabetic order. + +-s:: +--summary:: + Suppress commit description and provide a commit count summary only. + +-e:: +--email:: + Show the email address of each author. + +--format[=<format>]:: + Instead of the commit subject, use some other information to + describe each commit. '<format>' can be any string accepted + by the `--format` option of 'git log', such as '* [%h] %s'. + (See the "PRETTY FORMATS" section of linkgit:git-log[1].) + + Each pretty-printed commit will be rewrapped before it is shown. + +-w[<width>[,<indent1>[,<indent2>]]]:: + Linewrap the output by wrapping each line at `width`. The first + line of each entry is indented by `indent1` spaces, and the second + and subsequent lines are indented by `indent2` spaces. `width`, + `indent1`, and `indent2` default to 76, 6 and 9 respectively. ++ +If width is `0` (zero) then indent the lines of the output without wrapping +them. + +<revision range>:: + Show only commits in the specified revision range. When no + <revision range> is specified, it defaults to `HEAD` (i.e. the + whole history leading to the current commit). `origin..HEAD` + specifies all the commits reachable from the current commit + (i.e. `HEAD`), but not from `origin`. For a complete list of + ways to spell <revision range>, see the "Specifying Ranges" + section of linkgit:gitrevisions[7]. + +[\--] <path>...:: + Consider only commits that are enough to explain how the files + that match the specified paths came to be. ++ +Paths may need to be prefixed with "\-- " to separate them from +options or the revision range, when confusion arises. + +MAPPING AUTHORS +--------------- + +The `.mailmap` feature is used to coalesce together commits by the same +person in the shortlog, where their name and/or email address was +spelled differently. + +include::mailmap.txt[] + +GIT +--- +Part of the linkgit:git[1] suite diff --git a/Documentation/git-show-branch.txt b/Documentation/git-show-branch.txt new file mode 100644 index 0000000..b91d4e5 --- /dev/null +++ b/Documentation/git-show-branch.txt @@ -0,0 +1,204 @@ +git-show-branch(1) +================== + +NAME +---- +git-show-branch - Show branches and their commits + +SYNOPSIS +-------- +[verse] +'git show-branch' [-a|--all] [-r|--remotes] [--topo-order | --date-order] + [--current] [--color[=<when>] | --no-color] [--sparse] + [--more=<n> | --list | --independent | --merge-base] + [--no-name | --sha1-name] [--topics] + [(<rev> | <glob>)...] +'git show-branch' (-g|--reflog)[=<n>[,<base>]] [--list] [<ref>] + +DESCRIPTION +----------- + +Shows the commit ancestry graph starting from the commits named +with <rev>s or <globs>s (or all refs under refs/heads +and/or refs/tags) semi-visually. + +It cannot show more than 29 branches and commits at a time. + +It uses `showbranch.default` multi-valued configuration items if +no <rev> or <glob> is given on the command line. + + +OPTIONS +------- +<rev>:: + Arbitrary extended SHA-1 expression (see linkgit:gitrevisions[7]) + that typically names a branch head or a tag. + +<glob>:: + A glob pattern that matches branch or tag names under + refs/. For example, if you have many topic + branches under refs/heads/topic, giving + `topic/*` would show all of them. + +-r:: +--remotes:: + Show the remote-tracking branches. + +-a:: +--all:: + Show both remote-tracking branches and local branches. + +--current:: + With this option, the command includes the current + branch to the list of revs to be shown when it is not + given on the command line. + +--topo-order:: + By default, the branches and their commits are shown in + reverse chronological order. This option makes them + appear in topological order (i.e., descendant commits + are shown before their parents). + +--date-order:: + This option is similar to '--topo-order' in the sense that no + parent comes before all of its children, but otherwise commits + are ordered according to their commit date. + +--sparse:: + By default, the output omits merges that are reachable + from only one tip being shown. This option makes them + visible. + +--more=<n>:: + Usually the command stops output upon showing the commit + that is the common ancestor of all the branches. This + flag tells the command to go <n> more common commits + beyond that. When <n> is negative, display only the + <reference>s given, without showing the commit ancestry + tree. + +--list:: + Synonym to `--more=-1` + +--merge-base:: + Instead of showing the commit list, determine possible + merge bases for the specified commits. All merge bases + will be contained in all specified commits. This is + different from how linkgit:git-merge-base[1] handles + the case of three or more commits. + +--independent:: + Among the <reference>s given, display only the ones that + cannot be reached from any other <reference>. + +--no-name:: + Do not show naming strings for each commit. + +--sha1-name:: + Instead of naming the commits using the path to reach + them from heads (e.g. "master~2" to mean the grandparent + of "master"), name them with the unique prefix of their + object names. + +--topics:: + Shows only commits that are NOT on the first branch given. + This helps track topic branches by hiding any commit that + is already in the main line of development. When given + "git show-branch --topics master topic1 topic2", this + will show the revisions given by "git rev-list {caret}master + topic1 topic2" + +-g:: +--reflog[=<n>[,<base>]] [<ref>]:: + Shows <n> most recent ref-log entries for the given + ref. If <base> is given, <n> entries going back from + that entry. <base> can be specified as count or date. + When no explicit <ref> parameter is given, it defaults to the + current branch (or `HEAD` if it is detached). + +--color[=<when>]:: + Color the status sign (one of these: `*` `!` `+` `-`) of each commit + corresponding to the branch it's in. + The value must be always (the default), never, or auto. + +--no-color:: + Turn off colored output, even when the configuration file gives the + default to color output. + Same as `--color=never`. + +Note that --more, --list, --independent and --merge-base options +are mutually exclusive. + + +OUTPUT +------ +Given N <references>, the first N lines are the one-line +description from their commit message. The branch head that is +pointed at by $GIT_DIR/HEAD is prefixed with an asterisk `*` +character while other heads are prefixed with a `!` character. + +Following these N lines, one-line log for each commit is +displayed, indented N places. If a commit is on the I-th +branch, the I-th indentation character shows a `+` sign; +otherwise it shows a space. Merge commits are denoted by +a `-` sign. Each commit shows a short name that +can be used as an extended SHA-1 to name that commit. + +The following example shows three branches, "master", "fixes" +and "mhf": + +------------------------------------------------ +$ git show-branch master fixes mhf +* [master] Add 'git show-branch'. + ! [fixes] Introduce "reset type" flag to "git reset" + ! [mhf] Allow "+remote:local" refspec to cause --force when fetching. +--- + + [mhf] Allow "+remote:local" refspec to cause --force when fetching. + + [mhf~1] Use git-octopus when pulling more than one heads. + + [fixes] Introduce "reset type" flag to "git reset" + + [mhf~2] "git fetch --force". + + [mhf~3] Use .git/remote/origin, not .git/branches/origin. + + [mhf~4] Make "git pull" and "git fetch" default to origin + + [mhf~5] Infamous 'octopus merge' + + [mhf~6] Retire git-parse-remote. + + [mhf~7] Multi-head fetch. + + [mhf~8] Start adding the $GIT_DIR/remotes/ support. +*++ [master] Add 'git show-branch'. +------------------------------------------------ + +These three branches all forked from a common commit, [master], +whose commit message is "Add {apostrophe}git show-branch{apostrophe}". +The "fixes" branch adds one commit "Introduce "reset type" flag to +"git reset"". The "mhf" branch adds many other commits. +The current branch is "master". + + +EXAMPLE +------- + +If you keep your primary branches immediately under +`refs/heads`, and topic branches in subdirectories of +it, having the following in the configuration file may help: + +------------ +[showbranch] + default = --topo-order + default = heads/* + +------------ + +With this, `git show-branch` without extra parameters would show +only the primary branches. In addition, if you happen to be on +your topic branch, it is shown as well. + +------------ +$ git show-branch --reflog="10,1 hour ago" --list master +------------ + +shows 10 reflog entries going back from the tip as of 1 hour ago. +Without `--list`, the output also shows how these tips are +topologically related with each other. + +GIT +--- +Part of the linkgit:git[1] suite diff --git a/Documentation/git-show-index.txt b/Documentation/git-show-index.txt new file mode 100644 index 0000000..a8a9509 --- /dev/null +++ b/Documentation/git-show-index.txt @@ -0,0 +1,27 @@ +git-show-index(1) +================= + +NAME +---- +git-show-index - Show packed archive index + + +SYNOPSIS +-------- +[verse] +'git show-index' + + +DESCRIPTION +----------- +Read the idx file for a Git packfile created with +'git pack-objects' command from the standard input, and +dump its contents. + +The information it outputs is subset of what you can get from +'git verify-pack -v'; this command only shows the packfile +offset and SHA-1 of each object. + +GIT +--- +Part of the linkgit:git[1] suite diff --git a/Documentation/git-show-ref.txt b/Documentation/git-show-ref.txt new file mode 100644 index 0000000..3a32451 --- /dev/null +++ b/Documentation/git-show-ref.txt @@ -0,0 +1,186 @@ +git-show-ref(1) +=============== + +NAME +---- +git-show-ref - List references in a local repository + +SYNOPSIS +-------- +[verse] +'git show-ref' [-q|--quiet] [--verify] [--head] [-d|--dereference] + [-s|--hash[=<n>]] [--abbrev[=<n>]] [--tags] + [--heads] [--] [<pattern>...] +'git show-ref' --exclude-existing[=<pattern>] + +DESCRIPTION +----------- + +Displays references available in a local repository along with the associated +commit IDs. Results can be filtered using a pattern and tags can be +dereferenced into object IDs. Additionally, it can be used to test whether a +particular ref exists. + +By default, shows the tags, heads, and remote refs. + +The --exclude-existing form is a filter that does the inverse. It reads +refs from stdin, one ref per line, and shows those that don't exist in +the local repository. + +Use of this utility is encouraged in favor of directly accessing files under +the `.git` directory. + +OPTIONS +------- + +--head:: + + Show the HEAD reference, even if it would normally be filtered out. + +--tags:: +--heads:: + + Limit to "refs/heads" and "refs/tags", respectively. These options + are not mutually exclusive; when given both, references stored in + "refs/heads" and "refs/tags" are displayed. + +-d:: +--dereference:: + + Dereference tags into object IDs as well. They will be shown with "{caret}{}" + appended. + +-s:: +--hash[=<n>]:: + + Only show the SHA-1 hash, not the reference name. When combined with + --dereference the dereferenced tag will still be shown after the SHA-1. + +--verify:: + + Enable stricter reference checking by requiring an exact ref path. + Aside from returning an error code of 1, it will also print an error + message if '--quiet' was not specified. + +--abbrev[=<n>]:: + + Abbreviate the object name. When using `--hash`, you do + not have to say `--hash --abbrev`; `--hash=n` would do. + +-q:: +--quiet:: + + Do not print any results to stdout. When combined with '--verify' this + can be used to silently check if a reference exists. + +--exclude-existing[=<pattern>]:: + + Make 'git show-ref' act as a filter that reads refs from stdin of the + form "`^(?:<anything>\s)?<refname>(?:\^{})?$`" + and performs the following actions on each: + (1) strip "{caret}{}" at the end of line if any; + (2) ignore if pattern is provided and does not head-match refname; + (3) warn if refname is not a well-formed refname and skip; + (4) ignore if refname is a ref that exists in the local repository; + (5) otherwise output the line. + + +<pattern>...:: + + Show references matching one or more patterns. Patterns are matched from + the end of the full name, and only complete parts are matched, e.g. + 'master' matches 'refs/heads/master', 'refs/remotes/origin/master', + 'refs/tags/jedi/master' but not 'refs/heads/mymaster' or + 'refs/remotes/master/jedi'. + +OUTPUT +------ + +The output is in the format: '<SHA-1 ID>' '<space>' '<reference name>'. + +----------------------------------------------------------------------------- +$ git show-ref --head --dereference +832e76a9899f560a90ffd62ae2ce83bbeff58f54 HEAD +832e76a9899f560a90ffd62ae2ce83bbeff58f54 refs/heads/master +832e76a9899f560a90ffd62ae2ce83bbeff58f54 refs/heads/origin +3521017556c5de4159da4615a39fa4d5d2c279b5 refs/tags/v0.99.9c +6ddc0964034342519a87fe013781abf31c6db6ad refs/tags/v0.99.9c^{} +055e4ae3ae6eb344cbabf2a5256a49ea66040131 refs/tags/v1.0rc4 +423325a2d24638ddcc82ce47be5e40be550f4507 refs/tags/v1.0rc4^{} +... +----------------------------------------------------------------------------- + +When using --hash (and not --dereference) the output format is: '<SHA-1 ID>' + +----------------------------------------------------------------------------- +$ git show-ref --heads --hash +2e3ba0114a1f52b47df29743d6915d056be13278 +185008ae97960c8d551adcd9e23565194651b5d1 +03adf42c988195b50e1a1935ba5fcbc39b2b029b +... +----------------------------------------------------------------------------- + +EXAMPLE +------- + +To show all references called "master", whether tags or heads or anything +else, and regardless of how deep in the reference naming hierarchy they are, +use: + +----------------------------------------------------------------------------- + git show-ref master +----------------------------------------------------------------------------- + +This will show "refs/heads/master" but also "refs/remote/other-repo/master", +if such references exists. + +When using the '--verify' flag, the command requires an exact path: + +----------------------------------------------------------------------------- + git show-ref --verify refs/heads/master +----------------------------------------------------------------------------- + +will only match the exact branch called "master". + +If nothing matches, 'git show-ref' will return an error code of 1, +and in the case of verification, it will show an error message. + +For scripting, you can ask it to be quiet with the "--quiet" flag, which +allows you to do things like + +----------------------------------------------------------------------------- + git show-ref --quiet --verify -- "refs/heads/$headname" || + echo "$headname is not a valid branch" +----------------------------------------------------------------------------- + +to check whether a particular branch exists or not (notice how we don't +actually want to show any results, and we want to use the full refname for it +in order to not trigger the problem with ambiguous partial matches). + +To show only tags, or only proper branch heads, use "--tags" and/or "--heads" +respectively (using both means that it shows tags and heads, but not other +random references under the refs/ subdirectory). + +To do automatic tag object dereferencing, use the "-d" or "--dereference" +flag, so you can do + +----------------------------------------------------------------------------- + git show-ref --tags --dereference +----------------------------------------------------------------------------- + +to get a listing of all tags together with what they dereference. + +FILES +----- +`.git/refs/*`, `.git/packed-refs` + +SEE ALSO +-------- +linkgit:git-for-each-ref[1], +linkgit:git-ls-remote[1], +linkgit:git-update-ref[1], +linkgit:gitrepository-layout[5] + +GIT +--- +Part of the linkgit:git[1] suite diff --git a/Documentation/git-show.txt b/Documentation/git-show.txt new file mode 100644 index 0000000..82a4125 --- /dev/null +++ b/Documentation/git-show.txt @@ -0,0 +1,87 @@ +git-show(1) +=========== + +NAME +---- +git-show - Show various types of objects + + +SYNOPSIS +-------- +[verse] +'git show' [options] <object>... + +DESCRIPTION +----------- +Shows one or more objects (blobs, trees, tags and commits). + +For commits it shows the log message and textual diff. It also +presents the merge commit in a special format as produced by +'git diff-tree --cc'. + +For tags, it shows the tag message and the referenced objects. + +For trees, it shows the names (equivalent to 'git ls-tree' +with --name-only). + +For plain blobs, it shows the plain contents. + +The command takes options applicable to the 'git diff-tree' command to +control how the changes the commit introduces are shown. + +This manual page describes only the most frequently used options. + + +OPTIONS +------- +<object>...:: + The names of objects to show. + For a more complete list of ways to spell object names, see + "SPECIFYING REVISIONS" section in linkgit:gitrevisions[7]. + +include::pretty-options.txt[] + + +include::pretty-formats.txt[] + + +COMMON DIFF OPTIONS +------------------- + +:git-log: 1 +include::diff-options.txt[] + +include::diff-generate-patch.txt[] + + +EXAMPLES +-------- + +`git show v1.0.0`:: + Shows the tag `v1.0.0`, along with the object the tags + points at. + +`git show v1.0.0^{tree}`:: + Shows the tree pointed to by the tag `v1.0.0`. + +`git show -s --format=%s v1.0.0^{commit}`:: + Shows the subject of the commit pointed to by the + tag `v1.0.0`. + +`git show next~10:Documentation/README`:: + Shows the contents of the file `Documentation/README` as + they were current in the 10th last commit of the branch + `next`. + +`git show master:Makefile master:t/Makefile`:: + Concatenates the contents of said Makefiles in the head + of the branch `master`. + +Discussion +---------- + +include::i18n.txt[] + +GIT +--- +Part of the linkgit:git[1] suite diff --git a/Documentation/git-stage.txt b/Documentation/git-stage.txt new file mode 100644 index 0000000..25bcda9 --- /dev/null +++ b/Documentation/git-stage.txt @@ -0,0 +1,23 @@ +git-stage(1) +============ + +NAME +---- +git-stage - Add file contents to the staging area + + +SYNOPSIS +-------- +[verse] +'git stage' args... + + +DESCRIPTION +----------- + +This is a synonym for linkgit:git-add[1]. Please refer to the +documentation of that command. + +GIT +--- +Part of the linkgit:git[1] suite diff --git a/Documentation/git-stash.txt b/Documentation/git-stash.txt new file mode 100644 index 0000000..92df596 --- /dev/null +++ b/Documentation/git-stash.txt @@ -0,0 +1,280 @@ +git-stash(1) +============ + +NAME +---- +git-stash - Stash the changes in a dirty working directory away + +SYNOPSIS +-------- +[verse] +'git stash' list [<options>] +'git stash' show [<stash>] +'git stash' drop [-q|--quiet] [<stash>] +'git stash' ( pop | apply ) [--index] [-q|--quiet] [<stash>] +'git stash' branch <branchname> [<stash>] +'git stash' [save [-p|--patch] [-k|--[no-]keep-index] [-q|--quiet] + [-u|--include-untracked] [-a|--all] [<message>]] +'git stash' clear +'git stash' create [<message>] +'git stash' store [-m|--message <message>] [-q|--quiet] <commit> + +DESCRIPTION +----------- + +Use `git stash` when you want to record the current state of the +working directory and the index, but want to go back to a clean +working directory. The command saves your local modifications away +and reverts the working directory to match the `HEAD` commit. + +The modifications stashed away by this command can be listed with +`git stash list`, inspected with `git stash show`, and restored +(potentially on top of a different commit) with `git stash apply`. +Calling `git stash` without any arguments is equivalent to `git stash save`. +A stash is by default listed as "WIP on 'branchname' ...", but +you can give a more descriptive message on the command line when +you create one. + +The latest stash you created is stored in `refs/stash`; older +stashes are found in the reflog of this reference and can be named using +the usual reflog syntax (e.g. `stash@{0}` is the most recently +created stash, `stash@{1}` is the one before it, `stash@{2.hours.ago}` +is also possible). + +OPTIONS +------- + +save [-p|--patch] [-k|--[no-]keep-index] [-u|--include-untracked] [-a|--all] [-q|--quiet] [<message>]:: + + Save your local modifications to a new 'stash', and run `git reset + --hard` to revert them. The <message> part is optional and gives + the description along with the stashed state. For quickly making + a snapshot, you can omit _both_ "save" and <message>, but giving + only <message> does not trigger this action to prevent a misspelled + subcommand from making an unwanted stash. ++ +If the `--keep-index` option is used, all changes already added to the +index are left intact. ++ +If the `--include-untracked` option is used, all untracked files are also +stashed and then cleaned up with `git clean`, leaving the working directory +in a very clean state. If the `--all` option is used instead then the +ignored files are stashed and cleaned in addition to the untracked files. ++ +With `--patch`, you can interactively select hunks from the diff +between HEAD and the working tree to be stashed. The stash entry is +constructed such that its index state is the same as the index state +of your repository, and its worktree contains only the changes you +selected interactively. The selected changes are then rolled back +from your worktree. See the ``Interactive Mode'' section of +linkgit:git-add[1] to learn how to operate the `--patch` mode. ++ +The `--patch` option implies `--keep-index`. You can use +`--no-keep-index` to override this. + +list [<options>]:: + + List the stashes that you currently have. Each 'stash' is listed + with its name (e.g. `stash@{0}` is the latest stash, `stash@{1}` is + the one before, etc.), the name of the branch that was current when the + stash was made, and a short description of the commit the stash was + based on. ++ +---------------------------------------------------------------- +stash@{0}: WIP on submit: 6ebd0e2... Update git-stash documentation +stash@{1}: On master: 9cc0589... Add git-stash +---------------------------------------------------------------- ++ +The command takes options applicable to the 'git log' +command to control what is shown and how. See linkgit:git-log[1]. + +show [<stash>]:: + + Show the changes recorded in the stash as a diff between the + stashed state and its original parent. When no `<stash>` is given, + shows the latest one. By default, the command shows the diffstat, but + it will accept any format known to 'git diff' (e.g., `git stash show + -p stash@{1}` to view the second most recent stash in patch form). + You can use stash.showStat and/or stash.showPatch config variables + to change the default behavior. + +pop [--index] [-q|--quiet] [<stash>]:: + + Remove a single stashed state from the stash list and apply it + on top of the current working tree state, i.e., do the inverse + operation of `git stash save`. The working directory must + match the index. ++ +Applying the state can fail with conflicts; in this case, it is not +removed from the stash list. You need to resolve the conflicts by hand +and call `git stash drop` manually afterwards. ++ +If the `--index` option is used, then tries to reinstate not only the working +tree's changes, but also the index's ones. However, this can fail, when you +have conflicts (which are stored in the index, where you therefore can no +longer apply the changes as they were originally). ++ +When no `<stash>` is given, `stash@{0}` is assumed, otherwise `<stash>` must +be a reference of the form `stash@{<revision>}`. + +apply [--index] [-q|--quiet] [<stash>]:: + + Like `pop`, but do not remove the state from the stash list. Unlike `pop`, + `<stash>` may be any commit that looks like a commit created by + `stash save` or `stash create`. + +branch <branchname> [<stash>]:: + + Creates and checks out a new branch named `<branchname>` starting from + the commit at which the `<stash>` was originally created, applies the + changes recorded in `<stash>` to the new working tree and index. + If that succeeds, and `<stash>` is a reference of the form + `stash@{<revision>}`, it then drops the `<stash>`. When no `<stash>` + is given, applies the latest one. ++ +This is useful if the branch on which you ran `git stash save` has +changed enough that `git stash apply` fails due to conflicts. Since +the stash is applied on top of the commit that was HEAD at the time +`git stash` was run, it restores the originally stashed state with +no conflicts. + +clear:: + Remove all the stashed states. Note that those states will then + be subject to pruning, and may be impossible to recover (see + 'Examples' below for a possible strategy). + +drop [-q|--quiet] [<stash>]:: + + Remove a single stashed state from the stash list. When no `<stash>` + is given, it removes the latest one. i.e. `stash@{0}`, otherwise + `<stash>` must be a valid stash log reference of the form + `stash@{<revision>}`. + +create:: + + Create a stash (which is a regular commit object) and return its + object name, without storing it anywhere in the ref namespace. + This is intended to be useful for scripts. It is probably not + the command you want to use; see "save" above. + +store:: + + Store a given stash created via 'git stash create' (which is a + dangling merge commit) in the stash ref, updating the stash + reflog. This is intended to be useful for scripts. It is + probably not the command you want to use; see "save" above. + +DISCUSSION +---------- + +A stash is represented as a commit whose tree records the state of the +working directory, and its first parent is the commit at `HEAD` when +the stash was created. The tree of the second parent records the +state of the index when the stash is made, and it is made a child of +the `HEAD` commit. The ancestry graph looks like this: + + .----W + / / + -----H----I + +where `H` is the `HEAD` commit, `I` is a commit that records the state +of the index, and `W` is a commit that records the state of the working +tree. + + +EXAMPLES +-------- + +Pulling into a dirty tree:: + +When you are in the middle of something, you learn that there are +upstream changes that are possibly relevant to what you are +doing. When your local changes do not conflict with the changes in +the upstream, a simple `git pull` will let you move forward. ++ +However, there are cases in which your local changes do conflict with +the upstream changes, and `git pull` refuses to overwrite your +changes. In such a case, you can stash your changes away, +perform a pull, and then unstash, like this: ++ +---------------------------------------------------------------- +$ git pull + ... +file foobar not up to date, cannot merge. +$ git stash +$ git pull +$ git stash pop +---------------------------------------------------------------- + +Interrupted workflow:: + +When you are in the middle of something, your boss comes in and +demands that you fix something immediately. Traditionally, you would +make a commit to a temporary branch to store your changes away, and +return to your original branch to make the emergency fix, like this: ++ +---------------------------------------------------------------- +# ... hack hack hack ... +$ git checkout -b my_wip +$ git commit -a -m "WIP" +$ git checkout master +$ edit emergency fix +$ git commit -a -m "Fix in a hurry" +$ git checkout my_wip +$ git reset --soft HEAD^ +# ... continue hacking ... +---------------------------------------------------------------- ++ +You can use 'git stash' to simplify the above, like this: ++ +---------------------------------------------------------------- +# ... hack hack hack ... +$ git stash +$ edit emergency fix +$ git commit -a -m "Fix in a hurry" +$ git stash pop +# ... continue hacking ... +---------------------------------------------------------------- + +Testing partial commits:: + +You can use `git stash save --keep-index` when you want to make two or +more commits out of the changes in the work tree, and you want to test +each change before committing: ++ +---------------------------------------------------------------- +# ... hack hack hack ... +$ git add --patch foo # add just first part to the index +$ git stash save --keep-index # save all other changes to the stash +$ edit/build/test first part +$ git commit -m 'First part' # commit fully tested change +$ git stash pop # prepare to work on all other changes +# ... repeat above five steps until one commit remains ... +$ edit/build/test remaining parts +$ git commit foo -m 'Remaining parts' +---------------------------------------------------------------- + +Recovering stashes that were cleared/dropped erroneously:: + +If you mistakenly drop or clear stashes, they cannot be recovered +through the normal safety mechanisms. However, you can try the +following incantation to get a list of stashes that are still in your +repository, but not reachable any more: ++ +---------------------------------------------------------------- +git fsck --unreachable | +grep commit | cut -d\ -f3 | +xargs git log --merges --no-walk --grep=WIP +---------------------------------------------------------------- + + +SEE ALSO +-------- +linkgit:git-checkout[1], +linkgit:git-commit[1], +linkgit:git-reflog[1], +linkgit:git-reset[1] + +GIT +--- +Part of the linkgit:git[1] suite diff --git a/Documentation/git-status.txt b/Documentation/git-status.txt new file mode 100644 index 0000000..e1e8f57 --- /dev/null +++ b/Documentation/git-status.txt @@ -0,0 +1,239 @@ +git-status(1) +============= + +NAME +---- +git-status - Show the working tree status + + +SYNOPSIS +-------- +[verse] +'git status' [<options>...] [--] [<pathspec>...] + +DESCRIPTION +----------- +Displays paths that have differences between the index file and the +current HEAD commit, paths that have differences between the working +tree and the index file, and paths in the working tree that are not +tracked by Git (and are not ignored by linkgit:gitignore[5]). The first +are what you _would_ commit by running `git commit`; the second and +third are what you _could_ commit by running 'git add' before running +`git commit`. + +OPTIONS +------- + +-s:: +--short:: + Give the output in the short-format. + +-b:: +--branch:: + Show the branch and tracking info even in short-format. + +--porcelain:: + Give the output in an easy-to-parse format for scripts. + This is similar to the short output, but will remain stable + across Git versions and regardless of user configuration. See + below for details. + +--long:: + Give the output in the long-format. This is the default. + +-v:: +--verbose:: + In addition to the names of files that have been changed, also + show the textual changes that are staged to be committed + (i.e., like the output of `git diff --cached`). If `-v` is specified + twice, then also show the changes in the working tree that + have not yet been staged (i.e., like the output of `git diff`). + +-u[<mode>]:: +--untracked-files[=<mode>]:: + Show untracked files. ++ +The mode parameter is used to specify the handling of untracked files. +It is optional: it defaults to 'all', and if specified, it must be +stuck to the option (e.g. `-uno`, but not `-u no`). ++ +The possible options are: ++ + - 'no' - Show no untracked files. + - 'normal' - Shows untracked files and directories. + - 'all' - Also shows individual files in untracked directories. ++ +When `-u` option is not used, untracked files and directories are +shown (i.e. the same as specifying `normal`), to help you avoid +forgetting to add newly created files. Because it takes extra work +to find untracked files in the filesystem, this mode may take some +time in a large working tree. +Consider enabling untracked cache and split index if supported (see +`git update-index --untracked-cache` and `git update-index +--split-index`), Otherwise you can use `no` to have `git status` +return more quickly without showing untracked files. ++ +The default can be changed using the status.showUntrackedFiles +configuration variable documented in linkgit:git-config[1]. + +--ignore-submodules[=<when>]:: + Ignore changes to submodules when looking for changes. <when> can be + either "none", "untracked", "dirty" or "all", which is the default. + Using "none" will consider the submodule modified when it either contains + untracked or modified files or its HEAD differs from the commit recorded + in the superproject and can be used to override any settings of the + 'ignore' option in linkgit:git-config[1] or linkgit:gitmodules[5]. When + "untracked" is used submodules are not considered dirty when they only + contain untracked content (but they are still scanned for modified + content). Using "dirty" ignores all changes to the work tree of submodules, + only changes to the commits stored in the superproject are shown (this was + the behavior before 1.7.0). Using "all" hides all changes to submodules + (and suppresses the output of submodule summaries when the config option + `status.submoduleSummary` is set). + +--ignored:: + Show ignored files as well. + +-z:: + Terminate entries with NUL, instead of LF. This implies + the `--porcelain` output format if no other format is given. + +--column[=<options>]:: +--no-column:: + Display untracked files in columns. See configuration variable + column.status for option syntax.`--column` and `--no-column` + without options are equivalent to 'always' and 'never' + respectively. + + +OUTPUT +------ +The output from this command is designed to be used as a commit +template comment. +The default, long format, is designed to be human readable, +verbose and descriptive. Its contents and format are subject to change +at any time. + +The paths mentioned in the output, unlike many other Git commands, are +made relative to the current directory if you are working in a +subdirectory (this is on purpose, to help cutting and pasting). See +the status.relativePaths config option below. + +Short Format +~~~~~~~~~~~~ + +In the short-format, the status of each path is shown as + + XY PATH1 -> PATH2 + +where `PATH1` is the path in the `HEAD`, and the " `-> PATH2`" part is +shown only when `PATH1` corresponds to a different path in the +index/worktree (i.e. the file is renamed). The `XY` is a two-letter +status code. + +The fields (including the `->`) are separated from each other by a +single space. If a filename contains whitespace or other nonprintable +characters, that field will be quoted in the manner of a C string +literal: surrounded by ASCII double quote (34) characters, and with +interior special characters backslash-escaped. + +For paths with merge conflicts, `X` and `Y` show the modification +states of each side of the merge. For paths that do not have merge +conflicts, `X` shows the status of the index, and `Y` shows the status +of the work tree. For untracked paths, `XY` are `??`. Other status +codes can be interpreted as follows: + +* ' ' = unmodified +* 'M' = modified +* 'A' = added +* 'D' = deleted +* 'R' = renamed +* 'C' = copied +* 'U' = updated but unmerged + +Ignored files are not listed, unless `--ignored` option is in effect, +in which case `XY` are `!!`. + + X Y Meaning + ------------------------------------------------- + [MD] not updated + M [ MD] updated in index + A [ MD] added to index + D [ M] deleted from index + R [ MD] renamed in index + C [ MD] copied in index + [MARC] index and work tree matches + [ MARC] M work tree changed since index + [ MARC] D deleted in work tree + ------------------------------------------------- + D D unmerged, both deleted + A U unmerged, added by us + U D unmerged, deleted by them + U A unmerged, added by them + D U unmerged, deleted by us + A A unmerged, both added + U U unmerged, both modified + ------------------------------------------------- + ? ? untracked + ! ! ignored + ------------------------------------------------- + +If -b is used the short-format status is preceded by a line + +## branchname tracking info + +Porcelain Format +~~~~~~~~~~~~~~~~ + +The porcelain format is similar to the short format, but is guaranteed +not to change in a backwards-incompatible way between Git versions or +based on user configuration. This makes it ideal for parsing by scripts. +The description of the short format above also describes the porcelain +format, with a few exceptions: + +1. The user's color.status configuration is not respected; color will + always be off. + +2. The user's status.relativePaths configuration is not respected; paths + shown will always be relative to the repository root. + +There is also an alternate -z format recommended for machine parsing. In +that format, the status field is the same, but some other things +change. First, the '\->' is omitted from rename entries and the field +order is reversed (e.g 'from \-> to' becomes 'to from'). Second, a NUL +(ASCII 0) follows each filename, replacing space as a field separator +and the terminating newline (but a space still separates the status +field from the first filename). Third, filenames containing special +characters are not specially formatted; no quoting or +backslash-escaping is performed. + +CONFIGURATION +------------- + +The command honors `color.status` (or `status.color` -- they +mean the same thing and the latter is kept for backward +compatibility) and `color.status.<slot>` configuration variables +to colorize its output. + +If the config variable `status.relativePaths` is set to false, then all +paths shown are relative to the repository root, not to the current +directory. + +If `status.submoduleSummary` is set to a non zero number or true (identical +to -1 or an unlimited number), the submodule summary will be enabled for +the long format and a summary of commits for modified submodules will be +shown (see --summary-limit option of linkgit:git-submodule[1]). Please note +that the summary output from the status command will be suppressed for all +submodules when `diff.ignoreSubmodules` is set to 'all' or only for those +submodules where `submodule.<name>.ignore=all`. To also view the summary for +ignored submodules you can either use the --ignore-submodules=dirty command +line option or the 'git submodule summary' command, which shows a similar +output but does not honor these settings. + +SEE ALSO +-------- +linkgit:gitignore[5] + +GIT +--- +Part of the linkgit:git[1] suite diff --git a/Documentation/git-stripspace.txt b/Documentation/git-stripspace.txt new file mode 100644 index 0000000..2438f76 --- /dev/null +++ b/Documentation/git-stripspace.txt @@ -0,0 +1,94 @@ +git-stripspace(1) +================= + +NAME +---- +git-stripspace - Remove unnecessary whitespace + + +SYNOPSIS +-------- +[verse] +'git stripspace' [-s | --strip-comments] +'git stripspace' [-c | --comment-lines] + +DESCRIPTION +----------- + +Read text, such as commit messages, notes, tags and branch +descriptions, from the standard input and clean it in the manner +used by Git. + +With no arguments, this will: + +- remove trailing whitespace from all lines +- collapse multiple consecutive empty lines into one empty line +- remove empty lines from the beginning and end of the input +- add a missing '\n' to the last line if necessary. + +In the case where the input consists entirely of whitespace characters, no +output will be produced. + +*NOTE*: This is intended for cleaning metadata, prefer the `--whitespace=fix` +mode of linkgit:git-apply[1] for correcting whitespace of patches or files in +the repository. + +OPTIONS +------- +-s:: +--strip-comments:: + Skip and remove all lines starting with comment character (default '#'). + +-c:: +--comment-lines:: + Prepend comment character and blank to each line. Lines will automatically + be terminated with a newline. On empty lines, only the comment character + will be prepended. + +EXAMPLES +-------- + +Given the following noisy input with '$' indicating the end of a line: + +--------- +|A brief introduction $ +| $ +|$ +|A new paragraph$ +|# with a commented-out line $ +|explaining lots of stuff.$ +|$ +|# An old paragraph, also commented-out. $ +| $ +|The end.$ +| $ +--------- + +Use 'git stripspace' with no arguments to obtain: + +--------- +|A brief introduction$ +|$ +|A new paragraph$ +|# with a commented-out line$ +|explaining lots of stuff.$ +|$ +|# An old paragraph, also commented-out.$ +|$ +|The end.$ +--------- + +Use 'git stripspace --strip-comments' to obtain: + +--------- +|A brief introduction$ +|$ +|A new paragraph$ +|explaining lots of stuff.$ +|$ +|The end.$ +--------- + +GIT +--- +Part of the linkgit:git[1] suite diff --git a/Documentation/git-submodule.txt b/Documentation/git-submodule.txt new file mode 100644 index 0000000..ad85183 --- /dev/null +++ b/Documentation/git-submodule.txt @@ -0,0 +1,403 @@ +git-submodule(1) +================ + +NAME +---- +git-submodule - Initialize, update or inspect submodules + + +SYNOPSIS +-------- +[verse] +'git submodule' [--quiet] add [-b <branch>] [-f|--force] [--name <name>] + [--reference <repository>] [--depth <depth>] [--] <repository> [<path>] +'git submodule' [--quiet] status [--cached] [--recursive] [--] [<path>...] +'git submodule' [--quiet] init [--] [<path>...] +'git submodule' [--quiet] deinit [-f|--force] (--all|[--] <path>...) +'git submodule' [--quiet] update [--init] [--remote] [-N|--no-fetch] + [-f|--force] [--rebase|--merge] [--reference <repository>] + [--depth <depth>] [--recursive] [--] [<path>...] +'git submodule' [--quiet] summary [--cached|--files] [(-n|--summary-limit) <n>] + [commit] [--] [<path>...] +'git submodule' [--quiet] foreach [--recursive] <command> +'git submodule' [--quiet] sync [--recursive] [--] [<path>...] + + +DESCRIPTION +----------- +Inspects, updates and manages submodules. + +A submodule allows you to keep another Git repository in a subdirectory +of your repository. The other repository has its own history, which does not +interfere with the history of the current repository. This can be used to +have external dependencies such as third party libraries for example. + +When cloning or pulling a repository containing submodules however, +these will not be checked out by default; the 'init' and 'update' +subcommands will maintain submodules checked out and at +appropriate revision in your working tree. + +Submodules are composed from a so-called `gitlink` tree entry +in the main repository that refers to a particular commit object +within the inner repository that is completely separate. +A record in the `.gitmodules` (see linkgit:gitmodules[5]) file at the +root of the source tree assigns a logical name to the submodule and +describes the default URL the submodule shall be cloned from. +The logical name can be used for overriding this URL within your +local repository configuration (see 'submodule init'). + +Submodules are not to be confused with remotes, which are other +repositories of the same project; submodules are meant for +different projects you would like to make part of your source tree, +while the history of the two projects still stays completely +independent and you cannot modify the contents of the submodule +from within the main project. +If you want to merge the project histories and want to treat the +aggregated whole as a single project from then on, you may want to +add a remote for the other project and use the 'subtree' merge strategy, +instead of treating the other project as a submodule. Directories +that come from both projects can be cloned and checked out as a whole +if you choose to go that route. + +COMMANDS +-------- +add:: + Add the given repository as a submodule at the given path + to the changeset to be committed next to the current + project: the current project is termed the "superproject". ++ +This requires at least one argument: <repository>. The optional +argument <path> is the relative location for the cloned submodule +to exist in the superproject. If <path> is not given, the +"humanish" part of the source repository is used ("repo" for +"/path/to/repo.git" and "foo" for "host.xz:foo/.git"). +The <path> is also used as the submodule's logical name in its +configuration entries unless `--name` is used to specify a logical name. ++ +<repository> is the URL of the new submodule's origin repository. +This may be either an absolute URL, or (if it begins with ./ +or ../), the location relative to the superproject's origin +repository (Please note that to specify a repository 'foo.git' +which is located right next to a superproject 'bar.git', you'll +have to use '../foo.git' instead of './foo.git' - as one might expect +when following the rules for relative URLs - because the evaluation +of relative URLs in Git is identical to that of relative directories). +If the superproject doesn't have an origin configured +the superproject is its own authoritative upstream and the current +working directory is used instead. ++ +<path> is the relative location for the cloned submodule to +exist in the superproject. If <path> does not exist, then the +submodule is created by cloning from the named URL. If <path> does +exist and is already a valid Git repository, then this is added +to the changeset without cloning. This second form is provided +to ease creating a new submodule from scratch, and presumes +the user will later push the submodule to the given URL. ++ +In either case, the given URL is recorded into .gitmodules for +use by subsequent users cloning the superproject. If the URL is +given relative to the superproject's repository, the presumption +is the superproject and submodule repositories will be kept +together in the same relative location, and only the +superproject's URL needs to be provided: git-submodule will correctly +locate the submodule using the relative URL in .gitmodules. + +status:: + Show the status of the submodules. This will print the SHA-1 of the + currently checked out commit for each submodule, along with the + submodule path and the output of 'git describe' for the + SHA-1. Each SHA-1 will be prefixed with `-` if the submodule is not + initialized, `+` if the currently checked out submodule commit + does not match the SHA-1 found in the index of the containing + repository and `U` if the submodule has merge conflicts. ++ +If `--recursive` is specified, this command will recurse into nested +submodules, and show their status as well. ++ +If you are only interested in changes of the currently initialized +submodules with respect to the commit recorded in the index or the HEAD, +linkgit:git-status[1] and linkgit:git-diff[1] will provide that information +too (and can also report changes to a submodule's work tree). + +init:: + Initialize the submodules recorded in the index (which were + added and committed elsewhere) by copying submodule + names and urls from .gitmodules to .git/config. + Optional <path> arguments limit which submodules will be initialized. + It will also copy the value of `submodule.$name.update` into + .git/config. + The key used in .git/config is `submodule.$name.url`. + This command does not alter existing information in .git/config. + You can then customize the submodule clone URLs in .git/config + for your local setup and proceed to `git submodule update`; + you can also just use `git submodule update --init` without + the explicit 'init' step if you do not intend to customize + any submodule locations. + +deinit:: + Unregister the given submodules, i.e. remove the whole + `submodule.$name` section from .git/config together with their work + tree. Further calls to `git submodule update`, `git submodule foreach` + and `git submodule sync` will skip any unregistered submodules until + they are initialized again, so use this command if you don't want to + have a local checkout of the submodule in your working tree anymore. If + you really want to remove a submodule from the repository and commit + that use linkgit:git-rm[1] instead. ++ +When the command is run without pathspec, it errors out, +instead of deinit-ing everything, to prevent mistakes. ++ +If `--force` is specified, the submodule's working tree will +be removed even if it contains local modifications. + +update:: ++ +-- +Update the registered submodules to match what the superproject +expects by cloning missing submodules and updating the working tree of +the submodules. The "updating" can be done in several ways depending +on command line options and the value of `submodule.<name>.update` +configuration variable. Supported update procedures are: + + checkout;; the commit recorded in the superproject will be + checked out in the submodule on a detached HEAD. This is + done when `--checkout` option is given, or no option is + given, and `submodule.<name>.update` is unset, or if it is + set to 'checkout'. ++ +If `--force` is specified, the submodule will be checked out (using +`git checkout --force` if appropriate), even if the commit specified +in the index of the containing repository already matches the commit +checked out in the submodule. + + rebase;; the current branch of the submodule will be rebased + onto the commit recorded in the superproject. This is done + when `--rebase` option is given, or no option is given, and + `submodule.<name>.update` is set to 'rebase'. + + merge;; the commit recorded in the superproject will be merged + into the current branch in the submodule. This is done + when `--merge` option is given, or no option is given, and + `submodule.<name>.update` is set to 'merge'. + + custom command;; arbitrary shell command that takes a single + argument (the sha1 of the commit recorded in the + superproject) is executed. This is done when no option is + given, and `submodule.<name>.update` has the form of + '!command'. + +When no option is given and `submodule.<name>.update` is set to 'none', +the submodule is not updated. + +If the submodule is not yet initialized, and you just want to use the +setting as stored in .gitmodules, you can automatically initialize the +submodule with the `--init` option. + +If `--recursive` is specified, this command will recurse into the +registered submodules, and update any nested submodules within. +-- +summary:: + Show commit summary between the given commit (defaults to HEAD) and + working tree/index. For a submodule in question, a series of commits + in the submodule between the given super project commit and the + index or working tree (switched by `--cached`) are shown. If the option + `--files` is given, show the series of commits in the submodule between + the index of the super project and the working tree of the submodule + (this option doesn't allow to use the `--cached` option or to provide an + explicit commit). ++ +Using the `--submodule=log` option with linkgit:git-diff[1] will provide that +information too. + +foreach:: + Evaluates an arbitrary shell command in each checked out submodule. + The command has access to the variables $name, $path, $sha1 and + $toplevel: + $name is the name of the relevant submodule section in .gitmodules, + $path is the name of the submodule directory relative to the + superproject, $sha1 is the commit as recorded in the superproject, + and $toplevel is the absolute path to the top-level of the superproject. + Any submodules defined in the superproject but not checked out are + ignored by this command. Unless given `--quiet`, foreach prints the name + of each submodule before evaluating the command. + If `--recursive` is given, submodules are traversed recursively (i.e. + the given shell command is evaluated in nested submodules as well). + A non-zero return from the command in any submodule causes + the processing to terminate. This can be overridden by adding '|| :' + to the end of the command. ++ +As an example, +git submodule foreach \'echo $path {backtick}git +rev-parse HEAD{backtick}'+ will show the path and currently checked out +commit for each submodule. + +sync:: + Synchronizes submodules' remote URL configuration setting + to the value specified in .gitmodules. It will only affect those + submodules which already have a URL entry in .git/config (that is the + case when they are initialized or freshly added). This is useful when + submodule URLs change upstream and you need to update your local + repositories accordingly. ++ +"git submodule sync" synchronizes all submodules while +"git submodule sync \-- A" synchronizes submodule "A" only. ++ +If `--recursive` is specified, this command will recurse into the +registered submodules, and sync any nested submodules within. + +OPTIONS +------- +-q:: +--quiet:: + Only print error messages. + +--all:: + This option is only valid for the deinit command. Unregister all + submodules in the working tree. + +-b:: +--branch:: + Branch of repository to add as submodule. + The name of the branch is recorded as `submodule.<name>.branch` in + `.gitmodules` for `update --remote`. + +-f:: +--force:: + This option is only valid for add, deinit and update commands. + When running add, allow adding an otherwise ignored submodule path. + When running deinit the submodule working trees will be removed even + if they contain local changes. + When running update (only effective with the checkout procedure), + throw away local changes in submodules when switching to a + different commit; and always run a checkout operation in the + submodule, even if the commit listed in the index of the + containing repository matches the commit checked out in the + submodule. + +--cached:: + This option is only valid for status and summary commands. These + commands typically use the commit found in the submodule HEAD, but + with this option, the commit stored in the index is used instead. + +--files:: + This option is only valid for the summary command. This command + compares the commit in the index with that in the submodule HEAD + when this option is used. + +-n:: +--summary-limit:: + This option is only valid for the summary command. + Limit the summary size (number of commits shown in total). + Giving 0 will disable the summary; a negative number means unlimited + (the default). This limit only applies to modified submodules. The + size is always limited to 1 for added/deleted/typechanged submodules. + +--remote:: + This option is only valid for the update command. Instead of using + the superproject's recorded SHA-1 to update the submodule, use the + status of the submodule's remote-tracking branch. The remote used + is branch's remote (`branch.<name>.remote`), defaulting to `origin`. + The remote branch used defaults to `master`, but the branch name may + be overridden by setting the `submodule.<name>.branch` option in + either `.gitmodules` or `.git/config` (with `.git/config` taking + precedence). ++ +This works for any of the supported update procedures (`--checkout`, +`--rebase`, etc.). The only change is the source of the target SHA-1. +For example, `submodule update --remote --merge` will merge upstream +submodule changes into the submodules, while `submodule update +--merge` will merge superproject gitlink changes into the submodules. ++ +In order to ensure a current tracking branch state, `update --remote` +fetches the submodule's remote repository before calculating the +SHA-1. If you don't want to fetch, you should use `submodule update +--remote --no-fetch`. ++ +Use this option to integrate changes from the upstream subproject with +your submodule's current HEAD. Alternatively, you can run `git pull` +from the submodule, which is equivalent except for the remote branch +name: `update --remote` uses the default upstream repository and +`submodule.<name>.branch`, while `git pull` uses the submodule's +`branch.<name>.merge`. Prefer `submodule.<name>.branch` if you want +to distribute the default upstream branch with the superproject and +`branch.<name>.merge` if you want a more native feel while working in +the submodule itself. + +-N:: +--no-fetch:: + This option is only valid for the update command. + Don't fetch new objects from the remote site. + +--checkout:: + This option is only valid for the update command. + Checkout the commit recorded in the superproject on a detached HEAD + in the submodule. This is the default behavior, the main use of + this option is to override `submodule.$name.update` when set to + a value other than `checkout`. + If the key `submodule.$name.update` is either not explicitly set or + set to `checkout`, this option is implicit. + +--merge:: + This option is only valid for the update command. + Merge the commit recorded in the superproject into the current branch + of the submodule. If this option is given, the submodule's HEAD will + not be detached. If a merge failure prevents this process, you will + have to resolve the resulting conflicts within the submodule with the + usual conflict resolution tools. + If the key `submodule.$name.update` is set to `merge`, this option is + implicit. + +--rebase:: + This option is only valid for the update command. + Rebase the current branch onto the commit recorded in the + superproject. If this option is given, the submodule's HEAD will not + be detached. If a merge failure prevents this process, you will have + to resolve these failures with linkgit:git-rebase[1]. + If the key `submodule.$name.update` is set to `rebase`, this option is + implicit. + +--init:: + This option is only valid for the update command. + Initialize all submodules for which "git submodule init" has not been + called so far before updating. + +--name:: + This option is only valid for the add command. It sets the submodule's + name to the given string instead of defaulting to its path. The name + must be valid as a directory name and may not end with a '/'. + +--reference <repository>:: + This option is only valid for add and update commands. These + commands sometimes need to clone a remote repository. In this case, + this option will be passed to the linkgit:git-clone[1] command. ++ +*NOTE*: Do *not* use this option unless you have read the note +for linkgit:git-clone[1]'s `--reference` and `--shared` options carefully. + +--recursive:: + This option is only valid for foreach, update, status and sync commands. + Traverse submodules recursively. The operation is performed not + only in the submodules of the current repo, but also + in any nested submodules inside those submodules (and so on). + +--depth:: + This option is valid for add and update commands. Create a 'shallow' + clone with a history truncated to the specified number of revisions. + See linkgit:git-clone[1] + + +<path>...:: + Paths to submodule(s). When specified this will restrict the command + to only operate on the submodules found at the specified paths. + (This argument is required with add). + +FILES +----- +When initializing submodules, a .gitmodules file in the top-level directory +of the containing repository is used to find the url of each submodule. +This file should be formatted in the same way as `$GIT_DIR/config`. The key +to each submodule url is "submodule.$name.url". See linkgit:gitmodules[5] +for details. + +GIT +--- +Part of the linkgit:git[1] suite diff --git a/Documentation/git-svn.txt b/Documentation/git-svn.txt new file mode 100644 index 0000000..fb23a98 --- /dev/null +++ b/Documentation/git-svn.txt @@ -0,0 +1,1113 @@ +git-svn(1) +========== + +NAME +---- +git-svn - Bidirectional operation between a Subversion repository and Git + +SYNOPSIS +-------- +[verse] +'git svn' <command> [options] [arguments] + +DESCRIPTION +----------- +'git svn' is a simple conduit for changesets between Subversion and Git. +It provides a bidirectional flow of changes between a Subversion and a Git +repository. + +'git svn' can track a standard Subversion repository, +following the common "trunk/branches/tags" layout, with the --stdlayout option. +It can also follow branches and tags in any layout with the -T/-t/-b options +(see options to 'init' below, and also the 'clone' command). + +Once tracking a Subversion repository (with any of the above methods), the Git +repository can be updated from Subversion by the 'fetch' command and +Subversion updated from Git by the 'dcommit' command. + +COMMANDS +-------- + +'init':: + Initializes an empty Git repository with additional + metadata directories for 'git svn'. The Subversion URL + may be specified as a command-line argument, or as full + URL arguments to -T/-t/-b. Optionally, the target + directory to operate on can be specified as a second + argument. Normally this command initializes the current + directory. + +-T<trunk_subdir>;; +--trunk=<trunk_subdir>;; +-t<tags_subdir>;; +--tags=<tags_subdir>;; +-b<branches_subdir>;; +--branches=<branches_subdir>;; +-s;; +--stdlayout;; + These are optional command-line options for init. Each of + these flags can point to a relative repository path + (--tags=project/tags) or a full url + (--tags=https://foo.org/project/tags). + You can specify more than one --tags and/or --branches options, in case + your Subversion repository places tags or branches under multiple paths. + The option --stdlayout is + a shorthand way of setting trunk,tags,branches as the relative paths, + which is the Subversion default. If any of the other options are given + as well, they take precedence. +--no-metadata;; + Set the 'noMetadata' option in the [svn-remote] config. + This option is not recommended, please read the 'svn.noMetadata' + section of this manpage before using this option. +--use-svm-props;; + Set the 'useSvmProps' option in the [svn-remote] config. +--use-svnsync-props;; + Set the 'useSvnsyncProps' option in the [svn-remote] config. +--rewrite-root=<URL>;; + Set the 'rewriteRoot' option in the [svn-remote] config. +--rewrite-uuid=<UUID>;; + Set the 'rewriteUUID' option in the [svn-remote] config. +--username=<user>;; + For transports that SVN handles authentication for (http, + https, and plain svn), specify the username. For other + transports (e.g. `svn+ssh://`), you must include the username in + the URL, e.g. `svn+ssh://foo@svn.bar.com/project` +--prefix=<prefix>;; + This allows one to specify a prefix which is prepended + to the names of remotes if trunk/branches/tags are + specified. The prefix does not automatically include a + trailing slash, so be sure you include one in the + argument if that is what you want. If --branches/-b is + specified, the prefix must include a trailing slash. + Setting a prefix (with a trailing slash) is strongly + encouraged in any case, as your SVN-tracking refs will + then be located at "refs/remotes/$prefix/*", which is + compatible with Git's own remote-tracking ref layout + (refs/remotes/$remote/*). Setting a prefix is also useful + if you wish to track multiple projects that share a common + repository. + By default, the prefix is set to 'origin/'. ++ +NOTE: Before Git v2.0, the default prefix was "" (no prefix). This +meant that SVN-tracking refs were put at "refs/remotes/*", which is +incompatible with how Git's own remote-tracking refs are organized. +If you still want the old default, you can get it by passing +`--prefix ""` on the command line (`--prefix=""` may not work if +your Perl's Getopt::Long is < v2.37). + +--ignore-paths=<regex>;; + When passed to 'init' or 'clone' this regular expression will + be preserved as a config key. See 'fetch' for a description + of '--ignore-paths'. +--include-paths=<regex>;; + When passed to 'init' or 'clone' this regular expression will + be preserved as a config key. See 'fetch' for a description + of '--include-paths'. +--no-minimize-url;; + When tracking multiple directories (using --stdlayout, + --branches, or --tags options), git svn will attempt to connect + to the root (or highest allowed level) of the Subversion + repository. This default allows better tracking of history if + entire projects are moved within a repository, but may cause + issues on repositories where read access restrictions are in + place. Passing '--no-minimize-url' will allow git svn to + accept URLs as-is without attempting to connect to a higher + level directory. This option is off by default when only + one URL/branch is tracked (it would do little good). + +'fetch':: + Fetch unfetched revisions from the Subversion remote we are + tracking. The name of the [svn-remote "..."] section in the + $GIT_DIR/config file may be specified as an optional + command-line argument. ++ +This automatically updates the rev_map if needed (see +'$GIT_DIR/svn/\*\*/.rev_map.*' in the FILES section below for details). + +--localtime;; + Store Git commit times in the local time zone instead of UTC. This + makes 'git log' (even without --date=local) show the same times + that `svn log` would in the local time zone. ++ +This doesn't interfere with interoperating with the Subversion +repository you cloned from, but if you wish for your local Git +repository to be able to interoperate with someone else's local Git +repository, either don't use this option or you should both use it in +the same local time zone. + +--parent;; + Fetch only from the SVN parent of the current HEAD. + +--ignore-paths=<regex>;; + This allows one to specify a Perl regular expression that will + cause skipping of all matching paths from checkout from SVN. + The '--ignore-paths' option should match for every 'fetch' + (including automatic fetches due to 'clone', 'dcommit', + 'rebase', etc) on a given repository. ++ +[verse] +config key: svn-remote.<name>.ignore-paths ++ +If the ignore-paths configuration key is set, and the command-line +option is also given, both regular expressions will be used. ++ +Examples: ++ +-- +Skip "doc*" directory for every fetch;; ++ +------------------------------------------------------------------------ +--ignore-paths="^doc" +------------------------------------------------------------------------ + +Skip "branches" and "tags" of first level directories;; ++ +------------------------------------------------------------------------ +--ignore-paths="^[^/]+/(?:branches|tags)" +------------------------------------------------------------------------ +-- + +--include-paths=<regex>;; + This allows one to specify a Perl regular expression that will + cause the inclusion of only matching paths from checkout from SVN. + The '--include-paths' option should match for every 'fetch' + (including automatic fetches due to 'clone', 'dcommit', + 'rebase', etc) on a given repository. '--ignore-paths' takes + precedence over '--include-paths'. ++ +[verse] +config key: svn-remote.<name>.include-paths + +--log-window-size=<n>;; + Fetch <n> log entries per request when scanning Subversion history. + The default is 100. For very large Subversion repositories, larger + values may be needed for 'clone'/'fetch' to complete in reasonable + time. But overly large values may lead to higher memory usage and + request timeouts. + +'clone':: + Runs 'init' and 'fetch'. It will automatically create a + directory based on the basename of the URL passed to it; + or if a second argument is passed; it will create a directory + and work within that. It accepts all arguments that the + 'init' and 'fetch' commands accept; with the exception of + '--fetch-all' and '--parent'. After a repository is cloned, + the 'fetch' command will be able to update revisions without + affecting the working tree; and the 'rebase' command will be + able to update the working tree with the latest changes. + +--preserve-empty-dirs;; + Create a placeholder file in the local Git repository for each + empty directory fetched from Subversion. This includes directories + that become empty by removing all entries in the Subversion + repository (but not the directory itself). The placeholder files + are also tracked and removed when no longer necessary. + +--placeholder-filename=<filename>;; + Set the name of placeholder files created by --preserve-empty-dirs. + Default: ".gitignore" + +'rebase':: + This fetches revisions from the SVN parent of the current HEAD + and rebases the current (uncommitted to SVN) work against it. ++ +This works similarly to `svn update` or 'git pull' except that +it preserves linear history with 'git rebase' instead of +'git merge' for ease of dcommitting with 'git svn'. ++ +This accepts all options that 'git svn fetch' and 'git rebase' +accept. However, '--fetch-all' only fetches from the current +[svn-remote], and not all [svn-remote] definitions. ++ +Like 'git rebase'; this requires that the working tree be clean +and have no uncommitted changes. ++ +This automatically updates the rev_map if needed (see +'$GIT_DIR/svn/\*\*/.rev_map.*' in the FILES section below for details). + +-l;; +--local;; + Do not fetch remotely; only run 'git rebase' against the + last fetched commit from the upstream SVN. + +'dcommit':: + Commit each diff from the current branch directly to the SVN + repository, and then rebase or reset (depending on whether or + not there is a diff between SVN and head). This will create + a revision in SVN for each commit in Git. ++ +When an optional Git branch name (or a Git commit object name) +is specified as an argument, the subcommand works on the specified +branch, not on the current branch. ++ +Use of 'dcommit' is preferred to 'set-tree' (below). ++ +--no-rebase;; + After committing, do not rebase or reset. +--commit-url <URL>;; + Commit to this SVN URL (the full path). This is intended to + allow existing 'git svn' repositories created with one transport + method (e.g. `svn://` or `http://` for anonymous read) to be + reused if a user is later given access to an alternate transport + method (e.g. `svn+ssh://` or `https://`) for commit. ++ +[verse] +config key: svn-remote.<name>.commiturl +config key: svn.commiturl (overwrites all svn-remote.<name>.commiturl options) ++ +Note that the SVN URL of the commiturl config key includes the SVN branch. +If you rather want to set the commit URL for an entire SVN repository use +svn-remote.<name>.pushurl instead. ++ +Using this option for any other purpose (don't ask) is very strongly +discouraged. + +--mergeinfo=<mergeinfo>;; + Add the given merge information during the dcommit + (e.g. `--mergeinfo="/branches/foo:1-10"`). All svn server versions can + store this information (as a property), and svn clients starting from + version 1.5 can make use of it. To specify merge information from multiple + branches, use a single space character between the branches + (`--mergeinfo="/branches/foo:1-10 /branches/bar:3,5-6,8"`) ++ +[verse] +config key: svn.pushmergeinfo ++ +This option will cause git-svn to attempt to automatically populate the +svn:mergeinfo property in the SVN repository when possible. Currently, this can +only be done when dcommitting non-fast-forward merges where all parents but the +first have already been pushed into SVN. + +--interactive;; + Ask the user to confirm that a patch set should actually be sent to SVN. + For each patch, one may answer "yes" (accept this patch), "no" (discard this + patch), "all" (accept all patches), or "quit". ++ +'git svn dcommit' returns immediately if answer is "no" or "quit", without +committing anything to SVN. + +'branch':: + Create a branch in the SVN repository. + +-m;; +--message;; + Allows to specify the commit message. + +-t;; +--tag;; + Create a tag by using the tags_subdir instead of the branches_subdir + specified during git svn init. + +-d<path>;; +--destination=<path>;; + + If more than one --branches (or --tags) option was given to the 'init' + or 'clone' command, you must provide the location of the branch (or + tag) you wish to create in the SVN repository. <path> specifies which + path to use to create the branch or tag and should match the pattern + on the left-hand side of one of the configured branches or tags + refspecs. You can see these refspecs with the commands ++ + git config --get-all svn-remote.<name>.branches + git config --get-all svn-remote.<name>.tags ++ +where <name> is the name of the SVN repository as specified by the -R option to +'init' (or "svn" by default). + +--username;; + Specify the SVN username to perform the commit as. This option overrides + the 'username' configuration property. + +--commit-url;; + Use the specified URL to connect to the destination Subversion + repository. This is useful in cases where the source SVN + repository is read-only. This option overrides configuration + property 'commiturl'. ++ + git config --get-all svn-remote.<name>.commiturl ++ + +--parents;; + Create parent folders. This parameter is equivalent to the parameter + --parents on svn cp commands and is useful for non-standard repository + layouts. + +'tag':: + Create a tag in the SVN repository. This is a shorthand for + 'branch -t'. + +'log':: + This should make it easy to look up svn log messages when svn + users refer to -r/--revision numbers. ++ +The following features from `svn log' are supported: ++ +-- +-r <n>[:<n>];; +--revision=<n>[:<n>];; + is supported, non-numeric args are not: + HEAD, NEXT, BASE, PREV, etc ... +-v;; +--verbose;; + it's not completely compatible with the --verbose + output in svn log, but reasonably close. +--limit=<n>;; + is NOT the same as --max-count, doesn't count + merged/excluded commits +--incremental;; + supported +-- ++ +New features: ++ +-- +--show-commit;; + shows the Git commit sha1, as well +--oneline;; + our version of --pretty=oneline +-- ++ +NOTE: SVN itself only stores times in UTC and nothing else. The regular svn +client converts the UTC time to the local time (or based on the TZ= +environment). This command has the same behaviour. ++ +Any other arguments are passed directly to 'git log' + +'blame':: + Show what revision and author last modified each line of a file. The + output of this mode is format-compatible with the output of + `svn blame' by default. Like the SVN blame command, + local uncommitted changes in the working tree are ignored; + the version of the file in the HEAD revision is annotated. Unknown + arguments are passed directly to 'git blame'. ++ +--git-format;; + Produce output in the same format as 'git blame', but with + SVN revision numbers instead of Git commit hashes. In this mode, + changes that haven't been committed to SVN (including local + working-copy edits) are shown as revision 0. + +'find-rev':: + When given an SVN revision number of the form 'rN', returns the + corresponding Git commit hash (this can optionally be followed by a + tree-ish to specify which branch should be searched). When given a + tree-ish, returns the corresponding SVN revision number. ++ +-B;; +--before;; + Don't require an exact match if given an SVN revision, instead find + the commit corresponding to the state of the SVN repository (on the + current branch) at the specified revision. ++ +-A;; +--after;; + Don't require an exact match if given an SVN revision; if there is + not an exact match return the closest match searching forward in the + history. + +'set-tree':: + You should consider using 'dcommit' instead of this command. + Commit specified commit or tree objects to SVN. This relies on + your imported fetch data being up-to-date. This makes + absolutely no attempts to do patching when committing to SVN, it + simply overwrites files with those specified in the tree or + commit. All merging is assumed to have taken place + independently of 'git svn' functions. + +'create-ignore':: + Recursively finds the svn:ignore property on directories and + creates matching .gitignore files. The resulting files are staged to + be committed, but are not committed. Use -r/--revision to refer to a + specific revision. + +'show-ignore':: + Recursively finds and lists the svn:ignore property on + directories. The output is suitable for appending to + the $GIT_DIR/info/exclude file. + +'mkdirs':: + Attempts to recreate empty directories that core Git cannot track + based on information in $GIT_DIR/svn/<refname>/unhandled.log files. + Empty directories are automatically recreated when using + "git svn clone" and "git svn rebase", so "mkdirs" is intended + for use after commands like "git checkout" or "git reset". + (See the svn-remote.<name>.automkdirs config file option for + more information.) + +'commit-diff':: + Commits the diff of two tree-ish arguments from the + command-line. This command does not rely on being inside an `git svn + init`-ed repository. This command takes three arguments, (a) the + original tree to diff against, (b) the new tree result, (c) the + URL of the target Subversion repository. The final argument + (URL) may be omitted if you are working from a 'git svn'-aware + repository (that has been `init`-ed with 'git svn'). + The -r<revision> option is required for this. + +'info':: + Shows information about a file or directory similar to what + `svn info' provides. Does not currently support a -r/--revision + argument. Use the --url option to output only the value of the + 'URL:' field. + +'proplist':: + Lists the properties stored in the Subversion repository about a + given file or directory. Use -r/--revision to refer to a specific + Subversion revision. + +'propget':: + Gets the Subversion property given as the first argument, for a + file. A specific revision can be specified with -r/--revision. + +'show-externals':: + Shows the Subversion externals. Use -r/--revision to specify a + specific revision. + +'gc':: + Compress $GIT_DIR/svn/<refname>/unhandled.log files and remove + $GIT_DIR/svn/<refname>/index files. + +'reset':: + Undoes the effects of 'fetch' back to the specified revision. + This allows you to re-'fetch' an SVN revision. Normally the + contents of an SVN revision should never change and 'reset' + should not be necessary. However, if SVN permissions change, + or if you alter your --ignore-paths option, a 'fetch' may fail + with "not found in commit" (file not previously visible) or + "checksum mismatch" (missed a modification). If the problem + file cannot be ignored forever (with --ignore-paths) the only + way to repair the repo is to use 'reset'. ++ +Only the rev_map and refs/remotes/git-svn are changed (see +'$GIT_DIR/svn/\*\*/.rev_map.*' in the FILES section below for details). +Follow 'reset' with a 'fetch' and then 'git reset' or 'git rebase' to +move local branches onto the new tree. + +-r <n>;; +--revision=<n>;; + Specify the most recent revision to keep. All later revisions + are discarded. +-p;; +--parent;; + Discard the specified revision as well, keeping the nearest + parent instead. +Example:;; +Assume you have local changes in "master", but you need to refetch "r2". ++ +------------ + r1---r2---r3 remotes/git-svn + \ + A---B master +------------ ++ +Fix the ignore-paths or SVN permissions problem that caused "r2" to +be incomplete in the first place. Then: ++ +[verse] +git svn reset -r2 -p +git svn fetch ++ +------------ + r1---r2'--r3' remotes/git-svn + \ + r2---r3---A---B master +------------ ++ +Then fixup "master" with 'git rebase'. +Do NOT use 'git merge' or your history will not be compatible with a +future 'dcommit'! ++ +[verse] +git rebase --onto remotes/git-svn A^ master ++ +------------ + r1---r2'--r3' remotes/git-svn + \ + A'--B' master +------------ + +OPTIONS +------- + +--shared[=(false|true|umask|group|all|world|everybody)]:: +--template=<template_directory>:: + Only used with the 'init' command. + These are passed directly to 'git init'. + +-r <arg>:: +--revision <arg>:: + Used with the 'fetch' command. ++ +This allows revision ranges for partial/cauterized history +to be supported. $NUMBER, $NUMBER1:$NUMBER2 (numeric ranges), +$NUMBER:HEAD, and BASE:$NUMBER are all supported. ++ +This can allow you to make partial mirrors when running fetch; +but is generally not recommended because history will be skipped +and lost. + +-:: +--stdin:: + Only used with the 'set-tree' command. ++ +Read a list of commits from stdin and commit them in reverse +order. Only the leading sha1 is read from each line, so +'git rev-list --pretty=oneline' output can be used. + +--rmdir:: + Only used with the 'dcommit', 'set-tree' and 'commit-diff' commands. ++ +Remove directories from the SVN tree if there are no files left +behind. SVN can version empty directories, and they are not +removed by default if there are no files left in them. Git +cannot version empty directories. Enabling this flag will make +the commit to SVN act like Git. ++ +[verse] +config key: svn.rmdir + +-e:: +--edit:: + Only used with the 'dcommit', 'set-tree' and 'commit-diff' commands. ++ +Edit the commit message before committing to SVN. This is off by +default for objects that are commits, and forced on when committing +tree objects. ++ +[verse] +config key: svn.edit + +-l<num>:: +--find-copies-harder:: + Only used with the 'dcommit', 'set-tree' and 'commit-diff' commands. ++ +They are both passed directly to 'git diff-tree'; see +linkgit:git-diff-tree[1] for more information. ++ +[verse] +config key: svn.l +config key: svn.findcopiesharder + +-A<filename>:: +--authors-file=<filename>:: + Syntax is compatible with the file used by 'git cvsimport': ++ +------------------------------------------------------------------------ + loginname = Joe User <user@example.com> +------------------------------------------------------------------------ ++ +If this option is specified and 'git svn' encounters an SVN +committer name that does not exist in the authors-file, 'git svn' +will abort operation. The user will then have to add the +appropriate entry. Re-running the previous 'git svn' command +after the authors-file is modified should continue operation. ++ +[verse] +config key: svn.authorsfile + +--authors-prog=<filename>:: + If this option is specified, for each SVN committer name that + does not exist in the authors file, the given file is executed + with the committer name as the first argument. The program is + expected to return a single line of the form "Name <email>", + which will be treated as if included in the authors file. + +-q:: +--quiet:: + Make 'git svn' less verbose. Specify a second time to make it + even less verbose. + +-m:: +--merge:: +-s<strategy>:: +--strategy=<strategy>:: +-p:: +--preserve-merges:: + These are only used with the 'dcommit' and 'rebase' commands. ++ +Passed directly to 'git rebase' when using 'dcommit' if a +'git reset' cannot be used (see 'dcommit'). + +-n:: +--dry-run:: + This can be used with the 'dcommit', 'rebase', 'branch' and + 'tag' commands. ++ +For 'dcommit', print out the series of Git arguments that would show +which diffs would be committed to SVN. ++ +For 'rebase', display the local branch associated with the upstream svn +repository associated with the current branch and the URL of svn +repository that will be fetched from. ++ +For 'branch' and 'tag', display the urls that will be used for copying when +creating the branch or tag. + +--use-log-author:: + When retrieving svn commits into Git (as part of 'fetch', 'rebase', or + 'dcommit' operations), look for the first `From:` or `Signed-off-by:` line + in the log message and use that as the author string. +--add-author-from:: + When committing to svn from Git (as part of 'commit-diff', 'set-tree' or 'dcommit' + operations), if the existing log message doesn't already have a + `From:` or `Signed-off-by:` line, append a `From:` line based on the + Git commit's author string. If you use this, then `--use-log-author` + will retrieve a valid author string for all commits. + + +ADVANCED OPTIONS +---------------- + +-i<GIT_SVN_ID>:: +--id <GIT_SVN_ID>:: + This sets GIT_SVN_ID (instead of using the environment). This + allows the user to override the default refname to fetch from + when tracking a single URL. The 'log' and 'dcommit' commands + no longer require this switch as an argument. + +-R<remote name>:: +--svn-remote <remote name>:: + Specify the [svn-remote "<remote name>"] section to use, + this allows SVN multiple repositories to be tracked. + Default: "svn" + +--follow-parent:: + This option is only relevant if we are tracking branches (using + one of the repository layout options --trunk, --tags, + --branches, --stdlayout). For each tracked branch, try to find + out where its revision was copied from, and set + a suitable parent in the first Git commit for the branch. + This is especially helpful when we're tracking a directory + that has been moved around within the repository. If this + feature is disabled, the branches created by 'git svn' will all + be linear and not share any history, meaning that there will be + no information on where branches were branched off or merged. + However, following long/convoluted histories can take a long + time, so disabling this feature may speed up the cloning + process. This feature is enabled by default, use + --no-follow-parent to disable it. ++ +[verse] +config key: svn.followparent + +CONFIG FILE-ONLY OPTIONS +------------------------ + +svn.noMetadata:: +svn-remote.<name>.noMetadata:: + This gets rid of the 'git-svn-id:' lines at the end of every commit. ++ +This option can only be used for one-shot imports as 'git svn' +will not be able to fetch again without metadata. Additionally, +if you lose your '$GIT_DIR/svn/\*\*/.rev_map.*' files, 'git svn' will not +be able to rebuild them. ++ +The 'git svn log' command will not work on repositories using +this, either. Using this conflicts with the 'useSvmProps' +option for (hopefully) obvious reasons. ++ +This option is NOT recommended as it makes it difficult to track down +old references to SVN revision numbers in existing documentation, bug +reports and archives. If you plan to eventually migrate from SVN to Git +and are certain about dropping SVN history, consider +linkgit:git-filter-branch[1] instead. filter-branch also allows +reformatting of metadata for ease-of-reading and rewriting authorship +info for non-"svn.authorsFile" users. + +svn.useSvmProps:: +svn-remote.<name>.useSvmProps:: + This allows 'git svn' to re-map repository URLs and UUIDs from + mirrors created using SVN::Mirror (or svk) for metadata. ++ +If an SVN revision has a property, "svm:headrev", it is likely +that the revision was created by SVN::Mirror (also used by SVK). +The property contains a repository UUID and a revision. We want +to make it look like we are mirroring the original URL, so +introduce a helper function that returns the original identity +URL and UUID, and use it when generating metadata in commit +messages. + +svn.useSvnsyncProps:: +svn-remote.<name>.useSvnsyncprops:: + Similar to the useSvmProps option; this is for users + of the svnsync(1) command distributed with SVN 1.4.x and + later. + +svn-remote.<name>.rewriteRoot:: + This allows users to create repositories from alternate + URLs. For example, an administrator could run 'git svn' on the + server locally (accessing via file://) but wish to distribute + the repository with a public http:// or svn:// URL in the + metadata so users of it will see the public URL. + +svn-remote.<name>.rewriteUUID:: + Similar to the useSvmProps option; this is for users who need + to remap the UUID manually. This may be useful in situations + where the original UUID is not available via either useSvmProps + or useSvnsyncProps. + +svn-remote.<name>.pushurl:: + + Similar to Git's 'remote.<name>.pushurl', this key is designed + to be used in cases where 'url' points to an SVN repository + via a read-only transport, to provide an alternate read/write + transport. It is assumed that both keys point to the same + repository. Unlike 'commiturl', 'pushurl' is a base path. If + either 'commiturl' or 'pushurl' could be used, 'commiturl' + takes precedence. + +svn.brokenSymlinkWorkaround:: + This disables potentially expensive checks to workaround + broken symlinks checked into SVN by broken clients. Set this + option to "false" if you track a SVN repository with many + empty blobs that are not symlinks. This option may be changed + while 'git svn' is running and take effect on the next + revision fetched. If unset, 'git svn' assumes this option to + be "true". + +svn.pathnameencoding:: + This instructs git svn to recode pathnames to a given encoding. + It can be used by windows users and by those who work in non-utf8 + locales to avoid corrupted file names with non-ASCII characters. + Valid encodings are the ones supported by Perl's Encode module. + +svn-remote.<name>.automkdirs:: + Normally, the "git svn clone" and "git svn rebase" commands + attempt to recreate empty directories that are in the + Subversion repository. If this option is set to "false", then + empty directories will only be created if the "git svn mkdirs" + command is run explicitly. If unset, 'git svn' assumes this + option to be "true". + +Since the noMetadata, rewriteRoot, rewriteUUID, useSvnsyncProps and useSvmProps +options all affect the metadata generated and used by 'git svn'; they +*must* be set in the configuration file before any history is imported +and these settings should never be changed once they are set. + +Additionally, only one of these options can be used per svn-remote +section because they affect the 'git-svn-id:' metadata line, except +for rewriteRoot and rewriteUUID which can be used together. + + +BASIC EXAMPLES +-------------- + +Tracking and contributing to the trunk of a Subversion-managed project +(ignoring tags and branches): + +------------------------------------------------------------------------ +# Clone a repo (like git clone): + git svn clone http://svn.example.com/project/trunk +# Enter the newly cloned directory: + cd trunk +# You should be on master branch, double-check with 'git branch' + git branch +# Do some work and commit locally to Git: + git commit ... +# Something is committed to SVN, rebase your local changes against the +# latest changes in SVN: + git svn rebase +# Now commit your changes (that were committed previously using Git) to SVN, +# as well as automatically updating your working HEAD: + git svn dcommit +# Append svn:ignore settings to the default Git exclude file: + git svn show-ignore >> .git/info/exclude +------------------------------------------------------------------------ + +Tracking and contributing to an entire Subversion-managed project +(complete with a trunk, tags and branches): + +------------------------------------------------------------------------ +# Clone a repo with standard SVN directory layout (like git clone): + git svn clone http://svn.example.com/project --stdlayout --prefix svn/ +# Or, if the repo uses a non-standard directory layout: + git svn clone http://svn.example.com/project -T tr -b branch -t tag --prefix svn/ +# View all branches and tags you have cloned: + git branch -r +# Create a new branch in SVN + git svn branch waldo +# Reset your master to trunk (or any other branch, replacing 'trunk' +# with the appropriate name): + git reset --hard svn/trunk +# You may only dcommit to one branch/tag/trunk at a time. The usage +# of dcommit/rebase/show-ignore should be the same as above. +------------------------------------------------------------------------ + +The initial 'git svn clone' can be quite time-consuming +(especially for large Subversion repositories). If multiple +people (or one person with multiple machines) want to use +'git svn' to interact with the same Subversion repository, you can +do the initial 'git svn clone' to a repository on a server and +have each person clone that repository with 'git clone': + +------------------------------------------------------------------------ +# Do the initial import on a server + ssh server "cd /pub && git svn clone http://svn.example.com/project [options...]" +# Clone locally - make sure the refs/remotes/ space matches the server + mkdir project + cd project + git init + git remote add origin server:/pub/project + git config --replace-all remote.origin.fetch '+refs/remotes/*:refs/remotes/*' + git fetch +# Prevent fetch/pull from remote Git server in the future, +# we only want to use git svn for future updates + git config --remove-section remote.origin +# Create a local branch from one of the branches just fetched + git checkout -b master FETCH_HEAD +# Initialize 'git svn' locally (be sure to use the same URL and +# --stdlayout/-T/-b/-t/--prefix options as were used on server) + git svn init http://svn.example.com/project [options...] +# Pull the latest changes from Subversion + git svn rebase +------------------------------------------------------------------------ + +REBASE VS. PULL/MERGE +--------------------- +Prefer to use 'git svn rebase' or 'git rebase', rather than +'git pull' or 'git merge' to synchronize unintegrated commits with a 'git svn' +branch. Doing so will keep the history of unintegrated commits linear with +respect to the upstream SVN repository and allow the use of the preferred +'git svn dcommit' subcommand to push unintegrated commits back into SVN. + +Originally, 'git svn' recommended that developers pulled or merged from +the 'git svn' branch. This was because the author favored +`git svn set-tree B` to commit a single head rather than the +`git svn set-tree A..B` notation to commit multiple commits. Use of +'git pull' or 'git merge' with `git svn set-tree A..B` will cause non-linear +history to be flattened when committing into SVN and this can lead to merge +commits unexpectedly reversing previous commits in SVN. + +MERGE TRACKING +-------------- +While 'git svn' can track +copy history (including branches and tags) for repositories adopting a +standard layout, it cannot yet represent merge history that happened +inside git back upstream to SVN users. Therefore it is advised that +users keep history as linear as possible inside Git to ease +compatibility with SVN (see the CAVEATS section below). + +HANDLING OF SVN BRANCHES +------------------------ +If 'git svn' is configured to fetch branches (and --follow-branches +is in effect), it sometimes creates multiple Git branches for one +SVN branch, where the additional branches have names of the form +'branchname@nnn' (with nnn an SVN revision number). These additional +branches are created if 'git svn' cannot find a parent commit for the +first commit in an SVN branch, to connect the branch to the history of +the other branches. + +Normally, the first commit in an SVN branch consists +of a copy operation. 'git svn' will read this commit to get the SVN +revision the branch was created from. It will then try to find the +Git commit that corresponds to this SVN revision, and use that as the +parent of the branch. However, it is possible that there is no suitable +Git commit to serve as parent. This will happen, among other reasons, +if the SVN branch is a copy of a revision that was not fetched by 'git +svn' (e.g. because it is an old revision that was skipped with +'--revision'), or if in SVN a directory was copied that is not tracked +by 'git svn' (such as a branch that is not tracked at all, or a +subdirectory of a tracked branch). In these cases, 'git svn' will still +create a Git branch, but instead of using an existing Git commit as the +parent of the branch, it will read the SVN history of the directory the +branch was copied from and create appropriate Git commits. This is +indicated by the message "Initializing parent: <branchname>". + +Additionally, it will create a special branch named +'<branchname>@<SVN-Revision>', where <SVN-Revision> is the SVN revision +number the branch was copied from. This branch will point to the newly +created parent commit of the branch. If in SVN the branch was deleted +and later recreated from a different version, there will be multiple +such branches with an '@'. + +Note that this may mean that multiple Git commits are created for a +single SVN revision. + +An example: in an SVN repository with a standard +trunk/tags/branches layout, a directory trunk/sub is created in r.100. +In r.200, trunk/sub is branched by copying it to branches/. 'git svn +clone -s' will then create a branch 'sub'. It will also create new Git +commits for r.100 through r.199 and use these as the history of branch +'sub'. Thus there will be two Git commits for each revision from r.100 +to r.199 (one containing trunk/, one containing trunk/sub/). Finally, +it will create a branch 'sub@200' pointing to the new parent commit of +branch 'sub' (i.e. the commit for r.200 and trunk/sub/). + +CAVEATS +------- + +For the sake of simplicity and interoperating with Subversion, +it is recommended that all 'git svn' users clone, fetch and dcommit +directly from the SVN server, and avoid all 'git clone'/'pull'/'merge'/'push' +operations between Git repositories and branches. The recommended +method of exchanging code between Git branches and users is +'git format-patch' and 'git am', or just 'dcommit'ing to the SVN repository. + +Running 'git merge' or 'git pull' is NOT recommended on a branch you +plan to 'dcommit' from because Subversion users cannot see any +merges you've made. Furthermore, if you merge or pull from a Git branch +that is a mirror of an SVN branch, 'dcommit' may commit to the wrong +branch. + +If you do merge, note the following rule: 'git svn dcommit' will +attempt to commit on top of the SVN commit named in +------------------------------------------------------------------------ +git log --grep=^git-svn-id: --first-parent -1 +------------------------------------------------------------------------ +You 'must' therefore ensure that the most recent commit of the branch +you want to dcommit to is the 'first' parent of the merge. Chaos will +ensue otherwise, especially if the first parent is an older commit on +the same SVN branch. + +'git clone' does not clone branches under the refs/remotes/ hierarchy or +any 'git svn' metadata, or config. So repositories created and managed with +using 'git svn' should use 'rsync' for cloning, if cloning is to be done +at all. + +Since 'dcommit' uses rebase internally, any Git branches you 'git push' to +before 'dcommit' on will require forcing an overwrite of the existing ref +on the remote repository. This is generally considered bad practice, +see the linkgit:git-push[1] documentation for details. + +Do not use the --amend option of linkgit:git-commit[1] on a change you've +already dcommitted. It is considered bad practice to --amend commits +you've already pushed to a remote repository for other users, and +dcommit with SVN is analogous to that. + +When cloning an SVN repository, if none of the options for describing +the repository layout is used (--trunk, --tags, --branches, +--stdlayout), 'git svn clone' will create a Git repository with +completely linear history, where branches and tags appear as separate +directories in the working copy. While this is the easiest way to get a +copy of a complete repository, for projects with many branches it will +lead to a working copy many times larger than just the trunk. Thus for +projects using the standard directory structure (trunk/branches/tags), +it is recommended to clone with option '--stdlayout'. If the project +uses a non-standard structure, and/or if branches and tags are not +required, it is easiest to only clone one directory (typically trunk), +without giving any repository layout options. If the full history with +branches and tags is required, the options '--trunk' / '--branches' / +'--tags' must be used. + +When using multiple --branches or --tags, 'git svn' does not automatically +handle name collisions (for example, if two branches from different paths have +the same name, or if a branch and a tag have the same name). In these cases, +use 'init' to set up your Git repository then, before your first 'fetch', edit +the $GIT_DIR/config file so that the branches and tags are associated +with different name spaces. For example: + + branches = stable/*:refs/remotes/svn/stable/* + branches = debug/*:refs/remotes/svn/debug/* + +BUGS +---- + +We ignore all SVN properties except svn:executable. Any unhandled +properties are logged to $GIT_DIR/svn/<refname>/unhandled.log + +Renamed and copied directories are not detected by Git and hence not +tracked when committing to SVN. I do not plan on adding support for +this as it's quite difficult and time-consuming to get working for all +the possible corner cases (Git doesn't do it, either). Committing +renamed and copied files is fully supported if they're similar enough +for Git to detect them. + +In SVN, it is possible (though discouraged) to commit changes to a tag +(because a tag is just a directory copy, thus technically the same as a +branch). When cloning an SVN repository, 'git svn' cannot know if such a +commit to a tag will happen in the future. Thus it acts conservatively +and imports all SVN tags as branches, prefixing the tag name with 'tags/'. + +CONFIGURATION +------------- + +'git svn' stores [svn-remote] configuration information in the +repository $GIT_DIR/config file. It is similar the core Git +[remote] sections except 'fetch' keys do not accept glob +arguments; but they are instead handled by the 'branches' +and 'tags' keys. Since some SVN repositories are oddly +configured with multiple projects glob expansions such those +listed below are allowed: + +------------------------------------------------------------------------ +[svn-remote "project-a"] + url = http://server.org/svn + fetch = trunk/project-a:refs/remotes/project-a/trunk + branches = branches/*/project-a:refs/remotes/project-a/branches/* + branches = branches/release_*:refs/remotes/project-a/branches/release_* + branches = branches/re*se:refs/remotes/project-a/branches/* + tags = tags/*/project-a:refs/remotes/project-a/tags/* +------------------------------------------------------------------------ + +Keep in mind that the '\*' (asterisk) wildcard of the local ref +(right of the ':') *must* be the farthest right path component; +however the remote wildcard may be anywhere as long as it's an +independent path component (surrounded by '/' or EOL). This +type of configuration is not automatically created by 'init' and +should be manually entered with a text-editor or using 'git config'. + +Also note that only one asterisk is allowed per word. For example: + + branches = branches/re*se:refs/remotes/project-a/branches/* + +will match branches 'release', 'rese', 're123se', however + + branches = branches/re*s*e:refs/remotes/project-a/branches/* + +will produce an error. + +It is also possible to fetch a subset of branches or tags by using a +comma-separated list of names within braces. For example: + +------------------------------------------------------------------------ +[svn-remote "huge-project"] + url = http://server.org/svn + fetch = trunk/src:refs/remotes/trunk + branches = branches/{red,green}/src:refs/remotes/project-a/branches/* + tags = tags/{1.0,2.0}/src:refs/remotes/project-a/tags/* +------------------------------------------------------------------------ + +Multiple fetch, branches, and tags keys are supported: + +------------------------------------------------------------------------ +[svn-remote "messy-repo"] + url = http://server.org/svn + fetch = trunk/project-a:refs/remotes/project-a/trunk + fetch = branches/demos/june-project-a-demo:refs/remotes/project-a/demos/june-demo + branches = branches/server/*:refs/remotes/project-a/branches/* + branches = branches/demos/2011/*:refs/remotes/project-a/2011-demos/* + tags = tags/server/*:refs/remotes/project-a/tags/* +------------------------------------------------------------------------ + +Creating a branch in such a configuration requires disambiguating which +location to use using the -d or --destination flag: + +------------------------------------------------------------------------ +$ git svn branch -d branches/server release-2-3-0 +------------------------------------------------------------------------ + +Note that git-svn keeps track of the highest revision in which a branch +or tag has appeared. If the subset of branches or tags is changed after +fetching, then $GIT_DIR/svn/.metadata must be manually edited to remove +(or reset) branches-maxRev and/or tags-maxRev as appropriate. + +FILES +----- +$GIT_DIR/svn/\*\*/.rev_map.*:: + Mapping between Subversion revision numbers and Git commit + names. In a repository where the noMetadata option is not set, + this can be rebuilt from the git-svn-id: lines that are at the + end of every commit (see the 'svn.noMetadata' section above for + details). ++ +'git svn fetch' and 'git svn rebase' automatically update the rev_map +if it is missing or not up to date. 'git svn reset' automatically +rewinds it. + +SEE ALSO +-------- +linkgit:git-rebase[1] + +GIT +--- +Part of the linkgit:git[1] suite diff --git a/Documentation/git-symbolic-ref.txt b/Documentation/git-symbolic-ref.txt new file mode 100644 index 0000000..ef68ad2 --- /dev/null +++ b/Documentation/git-symbolic-ref.txt @@ -0,0 +1,69 @@ +git-symbolic-ref(1) +=================== + +NAME +---- +git-symbolic-ref - Read, modify and delete symbolic refs + +SYNOPSIS +-------- +[verse] +'git symbolic-ref' [-m <reason>] <name> <ref> +'git symbolic-ref' [-q] [--short] <name> +'git symbolic-ref' --delete [-q] <name> + +DESCRIPTION +----------- +Given one argument, reads which branch head the given symbolic +ref refers to and outputs its path, relative to the `.git/` +directory. Typically you would give `HEAD` as the <name> +argument to see which branch your working tree is on. + +Given two arguments, creates or updates a symbolic ref <name> to +point at the given branch <ref>. + +Given `--delete` and an additional argument, deletes the given +symbolic ref. + +A symbolic ref is a regular file that stores a string that +begins with `ref: refs/`. For example, your `.git/HEAD` is +a regular file whose contents is `ref: refs/heads/master`. + +OPTIONS +------- + +-d:: +--delete:: + Delete the symbolic ref <name>. + +-q:: +--quiet:: + Do not issue an error message if the <name> is not a + symbolic ref but a detached HEAD; instead exit with + non-zero status silently. + +--short:: + When showing the value of <name> as a symbolic ref, try to shorten the + value, e.g. from `refs/heads/master` to `master`. + +-m:: + Update the reflog for <name> with <reason>. This is valid only + when creating or updating a symbolic ref. + +NOTES +----- +In the past, `.git/HEAD` was a symbolic link pointing at +`refs/heads/master`. When we wanted to switch to another branch, +we did `ln -sf refs/heads/newbranch .git/HEAD`, and when we wanted +to find out which branch we are on, we did `readlink .git/HEAD`. +But symbolic links are not entirely portable, so they are now +deprecated and symbolic refs (as described above) are used by +default. + +'git symbolic-ref' will exit with status 0 if the contents of the +symbolic ref were printed correctly, with status 1 if the requested +name is not a symbolic ref, or 128 if another error occurs. + +GIT +--- +Part of the linkgit:git[1] suite diff --git a/Documentation/git-tag.txt b/Documentation/git-tag.txt new file mode 100644 index 0000000..abab481 --- /dev/null +++ b/Documentation/git-tag.txt @@ -0,0 +1,344 @@ +git-tag(1) +========== + +NAME +---- +git-tag - Create, list, delete or verify a tag object signed with GPG + + +SYNOPSIS +-------- +[verse] +'git tag' [-a | -s | -u <keyid>] [-f] [-m <msg> | -F <file>] + <tagname> [<commit> | <object>] +'git tag' -d <tagname>... +'git tag' [-n[<num>]] -l [--contains <commit>] [--points-at <object>] + [--column[=<options>] | --no-column] [--create-reflog] [--sort=<key>] + [--format=<format>] [--[no-]merged [<commit>]] [<pattern>...] +'git tag' -v <tagname>... + +DESCRIPTION +----------- + +Add a tag reference in `refs/tags/`, unless `-d/-l/-v` is given +to delete, list or verify tags. + +Unless `-f` is given, the named tag must not yet exist. + +If one of `-a`, `-s`, or `-u <keyid>` is passed, the command +creates a 'tag' object, and requires a tag message. Unless +`-m <msg>` or `-F <file>` is given, an editor is started for the user to type +in the tag message. + +If `-m <msg>` or `-F <file>` is given and `-a`, `-s`, and `-u <keyid>` +are absent, `-a` is implied. + +Otherwise just a tag reference for the SHA-1 object name of the commit object is +created (i.e. a lightweight tag). + +A GnuPG signed tag object will be created when `-s` or `-u +<keyid>` is used. When `-u <keyid>` is not used, the +committer identity for the current user is used to find the +GnuPG key for signing. The configuration variable `gpg.program` +is used to specify custom GnuPG binary. + +Tag objects (created with `-a`, `-s`, or `-u`) are called "annotated" +tags; they contain a creation date, the tagger name and e-mail, a +tagging message, and an optional GnuPG signature. Whereas a +"lightweight" tag is simply a name for an object (usually a commit +object). + +Annotated tags are meant for release while lightweight tags are meant +for private or temporary object labels. For this reason, some git +commands for naming objects (like `git describe`) will ignore +lightweight tags by default. + + +OPTIONS +------- +-a:: +--annotate:: + Make an unsigned, annotated tag object + +-s:: +--sign:: + Make a GPG-signed tag, using the default e-mail address's key. + +-u <keyid>:: +--local-user=<keyid>:: + Make a GPG-signed tag, using the given key. + +-f:: +--force:: + Replace an existing tag with the given name (instead of failing) + +-d:: +--delete:: + Delete existing tags with the given names. + +-v:: +--verify:: + Verify the gpg signature of the given tag names. + +-n<num>:: + <num> specifies how many lines from the annotation, if any, + are printed when using -l. + The default is not to print any annotation lines. + If no number is given to `-n`, only the first line is printed. + If the tag is not annotated, the commit message is displayed instead. + +-l <pattern>:: +--list <pattern>:: + List tags with names that match the given pattern (or all if no + pattern is given). Running "git tag" without arguments also + lists all tags. The pattern is a shell wildcard (i.e., matched + using fnmatch(3)). Multiple patterns may be given; if any of + them matches, the tag is shown. + +--sort=<key>:: + Sort based on the key given. Prefix `-` to sort in + descending order of the value. You may use the --sort=<key> option + multiple times, in which case the last key becomes the primary + key. Also supports "version:refname" or "v:refname" (tag + names are treated as versions). The "version:refname" sort + order can also be affected by the + "versionsort.prereleaseSuffix" configuration variable. + The keys supported are the same as those in `git for-each-ref`. + Sort order defaults to the value configured for the 'tag.sort' + variable if it exists, or lexicographic order otherwise. See + linkgit:git-config[1]. + +--column[=<options>]:: +--no-column:: + Display tag listing in columns. See configuration variable + column.tag for option syntax.`--column` and `--no-column` + without options are equivalent to 'always' and 'never' respectively. ++ +This option is only applicable when listing tags without annotation lines. + +--contains [<commit>]:: + Only list tags which contain the specified commit (HEAD if not + specified). + +--points-at <object>:: + Only list tags of the given object. + +-m <msg>:: +--message=<msg>:: + Use the given tag message (instead of prompting). + If multiple `-m` options are given, their values are + concatenated as separate paragraphs. + Implies `-a` if none of `-a`, `-s`, or `-u <keyid>` + is given. + +-F <file>:: +--file=<file>:: + Take the tag message from the given file. Use '-' to + read the message from the standard input. + Implies `-a` if none of `-a`, `-s`, or `-u <keyid>` + is given. + +--cleanup=<mode>:: + This option sets how the tag message is cleaned up. + The '<mode>' can be one of 'verbatim', 'whitespace' and 'strip'. The + 'strip' mode is default. The 'verbatim' mode does not change message at + all, 'whitespace' removes just leading/trailing whitespace lines and + 'strip' removes both whitespace and commentary. + +--create-reflog:: + Create a reflog for the tag. + +<tagname>:: + The name of the tag to create, delete, or describe. + The new tag name must pass all checks defined by + linkgit:git-check-ref-format[1]. Some of these checks + may restrict the characters allowed in a tag name. + +<commit>:: +<object>:: + The object that the new tag will refer to, usually a commit. + Defaults to HEAD. + +<format>:: + A string that interpolates `%(fieldname)` from the object + pointed at by a ref being shown. The format is the same as + that of linkgit:git-for-each-ref[1]. When unspecified, + defaults to `%(refname:strip=2)`. + +--[no-]merged [<commit>]:: + Only list tags whose tips are reachable, or not reachable + if '--no-merged' is used, from the specified commit ('HEAD' + if not specified). + +CONFIGURATION +------------- +By default, 'git tag' in sign-with-default mode (-s) will use your +committer identity (of the form `Your Name <your@email.address>`) to +find a key. If you want to use a different default key, you can specify +it in the repository configuration as follows: + +------------------------------------- +[user] + signingKey = <gpg-keyid> +------------------------------------- + + +DISCUSSION +---------- + +On Re-tagging +~~~~~~~~~~~~~ + +What should you do when you tag a wrong commit and you would +want to re-tag? + +If you never pushed anything out, just re-tag it. Use "-f" to +replace the old one. And you're done. + +But if you have pushed things out (or others could just read +your repository directly), then others will have already seen +the old tag. In that case you can do one of two things: + +. The sane thing. +Just admit you screwed up, and use a different name. Others have +already seen one tag-name, and if you keep the same name, you +may be in the situation that two people both have "version X", +but they actually have 'different' "X"'s. So just call it "X.1" +and be done with it. + +. The insane thing. +You really want to call the new version "X" too, 'even though' +others have already seen the old one. So just use 'git tag -f' +again, as if you hadn't already published the old one. + +However, Git does *not* (and it should not) change tags behind +users back. So if somebody already got the old tag, doing a +'git pull' on your tree shouldn't just make them overwrite the old +one. + +If somebody got a release tag from you, you cannot just change +the tag for them by updating your own one. This is a big +security issue, in that people MUST be able to trust their +tag-names. If you really want to do the insane thing, you need +to just fess up to it, and tell people that you messed up. You +can do that by making a very public announcement saying: + +------------ +Ok, I messed up, and I pushed out an earlier version tagged as X. I +then fixed something, and retagged the *fixed* tree as X again. + +If you got the wrong tag, and want the new one, please delete +the old one and fetch the new one by doing: + + git tag -d X + git fetch origin tag X + +to get my updated tag. + +You can test which tag you have by doing + + git rev-parse X + +which should return 0123456789abcdef.. if you have the new version. + +Sorry for the inconvenience. +------------ + +Does this seem a bit complicated? It *should* be. There is no +way that it would be correct to just "fix" it automatically. +People need to know that their tags might have been changed. + + +On Automatic following +~~~~~~~~~~~~~~~~~~~~~~ + +If you are following somebody else's tree, you are most likely +using remote-tracking branches (`refs/heads/origin` in traditional +layout, or `refs/remotes/origin/master` in the separate-remote +layout). You usually want the tags from the other end. + +On the other hand, if you are fetching because you would want a +one-shot merge from somebody else, you typically do not want to +get tags from there. This happens more often for people near +the toplevel but not limited to them. Mere mortals when pulling +from each other do not necessarily want to automatically get +private anchor point tags from the other person. + +Often, "please pull" messages on the mailing list just provide +two pieces of information: a repo URL and a branch name; this +is designed to be easily cut&pasted at the end of a 'git fetch' +command line: + +------------ +Linus, please pull from + + git://git..../proj.git master + +to get the following updates... +------------ + +becomes: + +------------ +$ git pull git://git..../proj.git master +------------ + +In such a case, you do not want to automatically follow the other +person's tags. + +One important aspect of Git is its distributed nature, which +largely means there is no inherent "upstream" or +"downstream" in the system. On the face of it, the above +example might seem to indicate that the tag namespace is owned +by the upper echelon of people and that tags only flow downwards, but +that is not the case. It only shows that the usage pattern +determines who are interested in whose tags. + +A one-shot pull is a sign that a commit history is now crossing +the boundary between one circle of people (e.g. "people who are +primarily interested in the networking part of the kernel") who may +have their own set of tags (e.g. "this is the third release +candidate from the networking group to be proposed for general +consumption with 2.6.21 release") to another circle of people +(e.g. "people who integrate various subsystem improvements"). +The latter are usually not interested in the detailed tags used +internally in the former group (that is what "internal" means). +That is why it is desirable not to follow tags automatically in +this case. + +It may well be that among networking people, they may want to +exchange the tags internal to their group, but in that workflow +they are most likely tracking each other's progress by +having remote-tracking branches. Again, the heuristic to automatically +follow such tags is a good thing. + + +On Backdating Tags +~~~~~~~~~~~~~~~~~~ + +If you have imported some changes from another VCS and would like +to add tags for major releases of your work, it is useful to be able +to specify the date to embed inside of the tag object; such data in +the tag object affects, for example, the ordering of tags in the +gitweb interface. + +To set the date used in future tag objects, set the environment +variable GIT_COMMITTER_DATE (see the later discussion of possible +values; the most common form is "YYYY-MM-DD HH:MM"). + +For example: + +------------ +$ GIT_COMMITTER_DATE="2006-10-02 10:31" git tag -s v1.0.1 +------------ + +include::date-formats.txt[] + +SEE ALSO +-------- +linkgit:git-check-ref-format[1]. +linkgit:git-config[1]. + +GIT +--- +Part of the linkgit:git[1] suite diff --git a/Documentation/git-tools.txt b/Documentation/git-tools.txt new file mode 100644 index 0000000..2f4ff50 --- /dev/null +++ b/Documentation/git-tools.txt @@ -0,0 +1,10 @@ +Git Tools +========= + +When Git was young, people looking for third-party Git-related tools came +to the Git project itself to find them, thus a list of such tools was +maintained here. These days, however, search engines fill that role much +more efficiently, so this manually-maintained list has been retired. + +See also the `contrib/` area, and the Git wiki: +http://git.or.cz/gitwiki/InterfacesFrontendsAndTools diff --git a/Documentation/git-unpack-file.txt b/Documentation/git-unpack-file.txt new file mode 100644 index 0000000..e9f148a --- /dev/null +++ b/Documentation/git-unpack-file.txt @@ -0,0 +1,28 @@ +git-unpack-file(1) +================== + +NAME +---- +git-unpack-file - Creates a temporary file with a blob's contents + + + +SYNOPSIS +-------- +[verse] +'git unpack-file' <blob> + +DESCRIPTION +----------- +Creates a file holding the contents of the blob specified by sha1. It +returns the name of the temporary file in the following format: + .merge_file_XXXXX + +OPTIONS +------- +<blob>:: + Must be a blob id + +GIT +--- +Part of the linkgit:git[1] suite diff --git a/Documentation/git-unpack-objects.txt b/Documentation/git-unpack-objects.txt new file mode 100644 index 0000000..3e887d1 --- /dev/null +++ b/Documentation/git-unpack-objects.txt @@ -0,0 +1,49 @@ +git-unpack-objects(1) +===================== + +NAME +---- +git-unpack-objects - Unpack objects from a packed archive + + +SYNOPSIS +-------- +[verse] +'git unpack-objects' [-n] [-q] [-r] [--strict] + + +DESCRIPTION +----------- +Read a packed archive (.pack) from the standard input, expanding +the objects contained within and writing them into the repository in +"loose" (one object per file) format. + +Objects that already exist in the repository will *not* be unpacked +from the packfile. Therefore, nothing will be unpacked if you use +this command on a packfile that exists within the target repository. + +See linkgit:git-repack[1] for options to generate +new packs and replace existing ones. + +OPTIONS +------- +-n:: + Dry run. Check the pack file without actually unpacking + the objects. + +-q:: + The command usually shows percentage progress. This + flag suppresses it. + +-r:: + When unpacking a corrupt packfile, the command dies at + the first corruption. This flag tells it to keep going + and make the best effort to recover as many objects as + possible. + +--strict:: + Don't write objects with broken content or links. + +GIT +--- +Part of the linkgit:git[1] suite diff --git a/Documentation/git-update-index.txt b/Documentation/git-update-index.txt new file mode 100644 index 0000000..c6cbed1 --- /dev/null +++ b/Documentation/git-update-index.txt @@ -0,0 +1,459 @@ +git-update-index(1) +=================== + +NAME +---- +git-update-index - Register file contents in the working tree to the index + + +SYNOPSIS +-------- +[verse] +'git update-index' + [--add] [--remove | --force-remove] [--replace] + [--refresh] [-q] [--unmerged] [--ignore-missing] + [(--cacheinfo <mode>,<object>,<file>)...] + [--chmod=(+|-)x] + [--[no-]assume-unchanged] + [--[no-]skip-worktree] + [--ignore-submodules] + [--[no-]split-index] + [--[no-|test-|force-]untracked-cache] + [--really-refresh] [--unresolve] [--again | -g] + [--info-only] [--index-info] + [-z] [--stdin] [--index-version <n>] + [--verbose] + [--] [<file>...] + +DESCRIPTION +----------- +Modifies the index or directory cache. Each file mentioned is updated +into the index and any 'unmerged' or 'needs updating' state is +cleared. + +See also linkgit:git-add[1] for a more user-friendly way to do some of +the most common operations on the index. + +The way 'git update-index' handles files it is told about can be modified +using the various options: + +OPTIONS +------- +--add:: + If a specified file isn't in the index already then it's + added. + Default behaviour is to ignore new files. + +--remove:: + If a specified file is in the index but is missing then it's + removed. + Default behavior is to ignore removed file. + +--refresh:: + Looks at the current index and checks to see if merges or + updates are needed by checking stat() information. + +-q:: + Quiet. If --refresh finds that the index needs an update, the + default behavior is to error out. This option makes + 'git update-index' continue anyway. + +--ignore-submodules:: + Do not try to update submodules. This option is only respected + when passed before --refresh. + +--unmerged:: + If --refresh finds unmerged changes in the index, the default + behavior is to error out. This option makes 'git update-index' + continue anyway. + +--ignore-missing:: + Ignores missing files during a --refresh + +--cacheinfo <mode>,<object>,<path>:: +--cacheinfo <mode> <object> <path>:: + Directly insert the specified info into the index. For + backward compatibility, you can also give these three + arguments as three separate parameters, but new users are + encouraged to use a single-parameter form. + +--index-info:: + Read index information from stdin. + +--chmod=(+|-)x:: + Set the execute permissions on the updated files. + +--[no-]assume-unchanged:: + When this flag is specified, the object names recorded + for the paths are not updated. Instead, this option + sets/unsets the "assume unchanged" bit for the + paths. When the "assume unchanged" bit is on, the user + promises not to change the file and allows Git to assume + that the working tree file matches what is recorded in + the index. If you want to change the working tree file, + you need to unset the bit to tell Git. This is + sometimes helpful when working with a big project on a + filesystem that has very slow lstat(2) system call + (e.g. cifs). ++ +Git will fail (gracefully) in case it needs to modify this file +in the index e.g. when merging in a commit; +thus, in case the assumed-untracked file is changed upstream, +you will need to handle the situation manually. + +--really-refresh:: + Like '--refresh', but checks stat information unconditionally, + without regard to the "assume unchanged" setting. + +--[no-]skip-worktree:: + When one of these flags is specified, the object name recorded + for the paths are not updated. Instead, these options + set and unset the "skip-worktree" bit for the paths. See + section "Skip-worktree bit" below for more information. + +-g:: +--again:: + Runs 'git update-index' itself on the paths whose index + entries are different from those from the `HEAD` commit. + +--unresolve:: + Restores the 'unmerged' or 'needs updating' state of a + file during a merge if it was cleared by accident. + +--info-only:: + Do not create objects in the object database for all + <file> arguments that follow this flag; just insert + their object IDs into the index. + +--force-remove:: + Remove the file from the index even when the working directory + still has such a file. (Implies --remove.) + +--replace:: + By default, when a file `path` exists in the index, + 'git update-index' refuses an attempt to add `path/file`. + Similarly if a file `path/file` exists, a file `path` + cannot be added. With --replace flag, existing entries + that conflict with the entry being added are + automatically removed with warning messages. + +--stdin:: + Instead of taking list of paths from the command line, + read list of paths from the standard input. Paths are + separated by LF (i.e. one path per line) by default. + +--verbose:: + Report what is being added and removed from index. + +--index-version <n>:: + Write the resulting index out in the named on-disk format version. + Supported versions are 2, 3 and 4. The current default version is 2 + or 3, depending on whether extra features are used, such as + `git add -N`. ++ +Version 4 performs a simple pathname compression that reduces index +size by 30%-50% on large repositories, which results in faster load +time. Version 4 is relatively young (first released in in 1.8.0 in +October 2012). Other Git implementations such as JGit and libgit2 +may not support it yet. + +-z:: + Only meaningful with `--stdin` or `--index-info`; paths are + separated with NUL character instead of LF. + +--split-index:: +--no-split-index:: + Enable or disable split index mode. If enabled, the index is + split into two files, $GIT_DIR/index and $GIT_DIR/sharedindex.<SHA-1>. + Changes are accumulated in $GIT_DIR/index while the shared + index file contains all index entries stays unchanged. If + split-index mode is already enabled and `--split-index` is + given again, all changes in $GIT_DIR/index are pushed back to + the shared index file. This mode is designed for very large + indexes that take a significant amount of time to read or write. + +--untracked-cache:: +--no-untracked-cache:: + Enable or disable untracked cache feature. Please use + `--test-untracked-cache` before enabling it. ++ +These options take effect whatever the value of the `core.untrackedCache` +configuration variable (see linkgit:git-config[1]). But a warning is +emitted when the change goes against the configured value, as the +configured value will take effect next time the index is read and this +will remove the intended effect of the option. + +--test-untracked-cache:: + Only perform tests on the working directory to make sure + untracked cache can be used. You have to manually enable + untracked cache using `--untracked-cache` or + `--force-untracked-cache` or the `core.untrackedCache` + configuration variable afterwards if you really want to use + it. If a test fails the exit code is 1 and a message + explains what is not working as needed, otherwise the exit + code is 0 and OK is printed. + +--force-untracked-cache:: + Same as `--untracked-cache`. Provided for backwards + compatibility with older versions of Git where + `--untracked-cache` used to imply `--test-untracked-cache` but + this option would enable the extension unconditionally. + +\--:: + Do not interpret any more arguments as options. + +<file>:: + Files to act on. + Note that files beginning with '.' are discarded. This includes + `./file` and `dir/./file`. If you don't want this, then use + cleaner names. + The same applies to directories ending '/' and paths with '//' + +Using --refresh +--------------- +'--refresh' does not calculate a new sha1 file or bring the index +up-to-date for mode/content changes. But what it *does* do is to +"re-match" the stat information of a file with the index, so that you +can refresh the index for a file that hasn't been changed but where +the stat entry is out of date. + +For example, you'd want to do this after doing a 'git read-tree', to link +up the stat index details with the proper files. + +Using --cacheinfo or --info-only +-------------------------------- +'--cacheinfo' is used to register a file that is not in the +current working directory. This is useful for minimum-checkout +merging. + +To pretend you have a file with mode and sha1 at path, say: + +---------------- +$ git update-index --cacheinfo <mode>,<sha1>,<path> +---------------- + +'--info-only' is used to register files without placing them in the object +database. This is useful for status-only repositories. + +Both '--cacheinfo' and '--info-only' behave similarly: the index is updated +but the object database isn't. '--cacheinfo' is useful when the object is +in the database but the file isn't available locally. '--info-only' is +useful when the file is available, but you do not wish to update the +object database. + + +Using --index-info +------------------ + +`--index-info` is a more powerful mechanism that lets you feed +multiple entry definitions from the standard input, and designed +specifically for scripts. It can take inputs of three formats: + + . mode SP sha1 TAB path ++ +The first format is what "git-apply --index-info" +reports, and used to reconstruct a partial tree +that is used for phony merge base tree when falling +back on 3-way merge. + + . mode SP type SP sha1 TAB path ++ +The second format is to stuff 'git ls-tree' output +into the index file. + + . mode SP sha1 SP stage TAB path ++ +This format is to put higher order stages into the +index file and matches 'git ls-files --stage' output. + +To place a higher stage entry to the index, the path should +first be removed by feeding a mode=0 entry for the path, and +then feeding necessary input lines in the third format. + +For example, starting with this index: + +------------ +$ git ls-files -s +100644 8a1218a1024a212bb3db30becd860315f9f3ac52 0 frotz +------------ + +you can feed the following input to `--index-info`: + +------------ +$ git update-index --index-info +0 0000000000000000000000000000000000000000 frotz +100644 8a1218a1024a212bb3db30becd860315f9f3ac52 1 frotz +100755 8a1218a1024a212bb3db30becd860315f9f3ac52 2 frotz +------------ + +The first line of the input feeds 0 as the mode to remove the +path; the SHA-1 does not matter as long as it is well formatted. +Then the second and third line feeds stage 1 and stage 2 entries +for that path. After the above, we would end up with this: + +------------ +$ git ls-files -s +100644 8a1218a1024a212bb3db30becd860315f9f3ac52 1 frotz +100755 8a1218a1024a212bb3db30becd860315f9f3ac52 2 frotz +------------ + + +Using ``assume unchanged'' bit +------------------------------ + +Many operations in Git depend on your filesystem to have an +efficient `lstat(2)` implementation, so that `st_mtime` +information for working tree files can be cheaply checked to see +if the file contents have changed from the version recorded in +the index file. Unfortunately, some filesystems have +inefficient `lstat(2)`. If your filesystem is one of them, you +can set "assume unchanged" bit to paths you have not changed to +cause Git not to do this check. Note that setting this bit on a +path does not mean Git will check the contents of the file to +see if it has changed -- it makes Git to omit any checking and +assume it has *not* changed. When you make changes to working +tree files, you have to explicitly tell Git about it by dropping +"assume unchanged" bit, either before or after you modify them. + +In order to set "assume unchanged" bit, use `--assume-unchanged` +option. To unset, use `--no-assume-unchanged`. To see which files +have the "assume unchanged" bit set, use `git ls-files -v` +(see linkgit:git-ls-files[1]). + +The command looks at `core.ignorestat` configuration variable. When +this is true, paths updated with `git update-index paths...` and +paths updated with other Git commands that update both index and +working tree (e.g. 'git apply --index', 'git checkout-index -u', +and 'git read-tree -u') are automatically marked as "assume +unchanged". Note that "assume unchanged" bit is *not* set if +`git update-index --refresh` finds the working tree file matches +the index (use `git update-index --really-refresh` if you want +to mark them as "assume unchanged"). + + +Examples +-------- +To update and refresh only the files already checked out: + +---------------- +$ git checkout-index -n -f -a && git update-index --ignore-missing --refresh +---------------- + +On an inefficient filesystem with `core.ignorestat` set:: ++ +------------ +$ git update-index --really-refresh <1> +$ git update-index --no-assume-unchanged foo.c <2> +$ git diff --name-only <3> +$ edit foo.c +$ git diff --name-only <4> +M foo.c +$ git update-index foo.c <5> +$ git diff --name-only <6> +$ edit foo.c +$ git diff --name-only <7> +$ git update-index --no-assume-unchanged foo.c <8> +$ git diff --name-only <9> +M foo.c +------------ ++ +<1> forces lstat(2) to set "assume unchanged" bits for paths that match index. +<2> mark the path to be edited. +<3> this does lstat(2) and finds index matches the path. +<4> this does lstat(2) and finds index does *not* match the path. +<5> registering the new version to index sets "assume unchanged" bit. +<6> and it is assumed unchanged. +<7> even after you edit it. +<8> you can tell about the change after the fact. +<9> now it checks with lstat(2) and finds it has been changed. + + +Skip-worktree bit +----------------- + +Skip-worktree bit can be defined in one (long) sentence: When reading +an entry, if it is marked as skip-worktree, then Git pretends its +working directory version is up to date and read the index version +instead. + +To elaborate, "reading" means checking for file existence, reading +file attributes or file content. The working directory version may be +present or absent. If present, its content may match against the index +version or not. Writing is not affected by this bit, content safety +is still first priority. Note that Git _can_ update working directory +file, that is marked skip-worktree, if it is safe to do so (i.e. +working directory version matches index version) + +Although this bit looks similar to assume-unchanged bit, its goal is +different from assume-unchanged bit's. Skip-worktree also takes +precedence over assume-unchanged bit when both are set. + +Untracked cache +--------------- + +This cache is meant to speed up commands that involve determining +untracked files such as `git status`. + +This feature works by recording the mtime of the working tree +directories and then omitting reading directories and stat calls +against files in those directories whose mtime hasn't changed. For +this to work the underlying operating system and file system must +change the `st_mtime` field of directories if files in the directory +are added, modified or deleted. + +You can test whether the filesystem supports that with the +`--test-untracked-cache` option. The `--untracked-cache` option used +to implicitly perform that test in older versions of Git, but that's +no longer the case. + +If you want to enable (or disable) this feature, it is easier to use +the `core.untrackedCache` configuration variable (see +linkgit:git-config[1]) than using the `--untracked-cache` option to +`git update-index` in each repository, especially if you want to do so +across all repositories you use, because you can set the configuration +variable to `true` (or `false`) in your `$HOME/.gitconfig` just once +and have it affect all repositories you touch. + +When the `core.untrackedCache` configuration variable is changed, the +untracked cache is added to or removed from the index the next time a +command reads the index; while when `--[no-|force-]untracked-cache` +are used, the untracked cache is immediately added to or removed from +the index. + +Configuration +------------- + +The command honors `core.filemode` configuration variable. If +your repository is on a filesystem whose executable bits are +unreliable, this should be set to 'false' (see linkgit:git-config[1]). +This causes the command to ignore differences in file modes recorded +in the index and the file mode on the filesystem if they differ only on +executable bit. On such an unfortunate filesystem, you may +need to use 'git update-index --chmod='. + +Quite similarly, if `core.symlinks` configuration variable is set +to 'false' (see linkgit:git-config[1]), symbolic links are checked out +as plain files, and this command does not modify a recorded file mode +from symbolic link to regular file. + +The command looks at `core.ignorestat` configuration variable. See +'Using "assume unchanged" bit' section above. + +The command also looks at `core.trustctime` configuration variable. +It can be useful when the inode change time is regularly modified by +something outside Git (file system crawlers and backup systems use +ctime for marking files processed) (see linkgit:git-config[1]). + +The untracked cache extension can be enabled by the +`core.untrackedCache` configuration variable (see +linkgit:git-config[1]). + +SEE ALSO +-------- +linkgit:git-config[1], +linkgit:git-add[1], +linkgit:git-ls-files[1] + +GIT +--- +Part of the linkgit:git[1] suite diff --git a/Documentation/git-update-ref.txt b/Documentation/git-update-ref.txt new file mode 100644 index 0000000..969bfab --- /dev/null +++ b/Documentation/git-update-ref.txt @@ -0,0 +1,152 @@ +git-update-ref(1) +================= + +NAME +---- +git-update-ref - Update the object name stored in a ref safely + +SYNOPSIS +-------- +[verse] +'git update-ref' [-m <reason>] (-d <ref> [<oldvalue>] | [--no-deref] [--create-reflog] <ref> <newvalue> [<oldvalue>] | --stdin [-z]) + +DESCRIPTION +----------- +Given two arguments, stores the <newvalue> in the <ref>, possibly +dereferencing the symbolic refs. E.g. `git update-ref HEAD +<newvalue>` updates the current branch head to the new object. + +Given three arguments, stores the <newvalue> in the <ref>, +possibly dereferencing the symbolic refs, after verifying that +the current value of the <ref> matches <oldvalue>. +E.g. `git update-ref refs/heads/master <newvalue> <oldvalue>` +updates the master branch head to <newvalue> only if its current +value is <oldvalue>. You can specify 40 "0" or an empty string +as <oldvalue> to make sure that the ref you are creating does +not exist. + +It also allows a "ref" file to be a symbolic pointer to another +ref file by starting with the four-byte header sequence of +"ref:". + +More importantly, it allows the update of a ref file to follow +these symbolic pointers, whether they are symlinks or these +"regular file symbolic refs". It follows *real* symlinks only +if they start with "refs/": otherwise it will just try to read +them and update them as a regular file (i.e. it will allow the +filesystem to follow them, but will overwrite such a symlink to +somewhere else with a regular filename). + +If --no-deref is given, <ref> itself is overwritten, rather than +the result of following the symbolic pointers. + +In general, using + + git update-ref HEAD "$head" + +should be a _lot_ safer than doing + + echo "$head" > "$GIT_DIR/HEAD" + +both from a symlink following standpoint *and* an error checking +standpoint. The "refs/" rule for symlinks means that symlinks +that point to "outside" the tree are safe: they'll be followed +for reading but not for writing (so we'll never write through a +ref symlink to some other tree, if you have copied a whole +archive by creating a symlink tree). + +With `-d` flag, it deletes the named <ref> after verifying it +still contains <oldvalue>. + +With `--stdin`, update-ref reads instructions from standard input and +performs all modifications together. Specify commands of the form: + + update SP <ref> SP <newvalue> [SP <oldvalue>] LF + create SP <ref> SP <newvalue> LF + delete SP <ref> [SP <oldvalue>] LF + verify SP <ref> [SP <oldvalue>] LF + option SP <opt> LF + +With `--create-reflog`, update-ref will create a reflog for each ref +even if one would not ordinarily be created. + +Quote fields containing whitespace as if they were strings in C source +code; i.e., surrounded by double-quotes and with backslash escapes. +Use 40 "0" characters or the empty string to specify a zero value. To +specify a missing value, omit the value and its preceding SP entirely. + +Alternatively, use `-z` to specify in NUL-terminated format, without +quoting: + + update SP <ref> NUL <newvalue> NUL [<oldvalue>] NUL + create SP <ref> NUL <newvalue> NUL + delete SP <ref> NUL [<oldvalue>] NUL + verify SP <ref> NUL [<oldvalue>] NUL + option SP <opt> NUL + +In this format, use 40 "0" to specify a zero value, and use the empty +string to specify a missing value. + +In either format, values can be specified in any form that Git +recognizes as an object name. Commands in any other format or a +repeated <ref> produce an error. Command meanings are: + +update:: + Set <ref> to <newvalue> after verifying <oldvalue>, if given. + Specify a zero <newvalue> to ensure the ref does not exist + after the update and/or a zero <oldvalue> to make sure the + ref does not exist before the update. + +create:: + Create <ref> with <newvalue> after verifying it does not + exist. The given <newvalue> may not be zero. + +delete:: + Delete <ref> after verifying it exists with <oldvalue>, if + given. If given, <oldvalue> may not be zero. + +verify:: + Verify <ref> against <oldvalue> but do not change it. If + <oldvalue> zero or missing, the ref must not exist. + +option:: + Modify behavior of the next command naming a <ref>. + The only valid option is `no-deref` to avoid dereferencing + a symbolic ref. + +If all <ref>s can be locked with matching <oldvalue>s +simultaneously, all modifications are performed. Otherwise, no +modifications are performed. Note that while each individual +<ref> is updated or deleted atomically, a concurrent reader may +still see a subset of the modifications. + +Logging Updates +--------------- +If config parameter "core.logAllRefUpdates" is true and the ref is one under +"refs/heads/", "refs/remotes/", "refs/notes/", or the symbolic ref HEAD; or +the file "$GIT_DIR/logs/<ref>" exists then `git update-ref` will append +a line to the log file "$GIT_DIR/logs/<ref>" (dereferencing all +symbolic refs before creating the log name) describing the change +in ref value. Log lines are formatted as: + + . oldsha1 SP newsha1 SP committer LF ++ +Where "oldsha1" is the 40 character hexadecimal value previously +stored in <ref>, "newsha1" is the 40 character hexadecimal value of +<newvalue> and "committer" is the committer's name, email address +and date in the standard Git committer ident format. + +Optionally with -m: + + . oldsha1 SP newsha1 SP committer TAB message LF ++ +Where all fields are as described above and "message" is the +value supplied to the -m option. + +An update will fail (without changing <ref>) if the current user is +unable to create a new log file, append to the existing log file +or does not have committer information available. + +GIT +--- +Part of the linkgit:git[1] suite diff --git a/Documentation/git-update-server-info.txt b/Documentation/git-update-server-info.txt new file mode 100644 index 0000000..bd0e364 --- /dev/null +++ b/Documentation/git-update-server-info.txt @@ -0,0 +1,44 @@ +git-update-server-info(1) +========================= + +NAME +---- +git-update-server-info - Update auxiliary info file to help dumb servers + + +SYNOPSIS +-------- +[verse] +'git update-server-info' [--force] + +DESCRIPTION +----------- +A dumb server that does not do on-the-fly pack generations must +have some auxiliary information files in $GIT_DIR/info and +$GIT_OBJECT_DIRECTORY/info directories to help clients discover +what references and packs the server has. This command +generates such auxiliary files. + + +OPTIONS +------- + +-f:: +--force:: + Update the info files from scratch. + + +OUTPUT +------ + +Currently the command updates the following files. Please see +linkgit:gitrepository-layout[5] for description of +what they are for: + +* objects/info/packs + +* info/refs + +GIT +--- +Part of the linkgit:git[1] suite diff --git a/Documentation/git-upload-archive.txt b/Documentation/git-upload-archive.txt new file mode 100644 index 0000000..fba0f1c --- /dev/null +++ b/Documentation/git-upload-archive.txt @@ -0,0 +1,62 @@ +git-upload-archive(1) +===================== + +NAME +---- +git-upload-archive - Send archive back to git-archive + + +SYNOPSIS +-------- +[verse] +'git upload-archive' <directory> + +DESCRIPTION +----------- +Invoked by 'git archive --remote' and sends a generated archive to the +other end over the Git protocol. + +This command is usually not invoked directly by the end user. The UI +for the protocol is on the 'git archive' side, and the program pair +is meant to be used to get an archive from a remote repository. + +SECURITY +-------- + +In order to protect the privacy of objects that have been removed from +history but may not yet have been pruned, `git-upload-archive` avoids +serving archives for commits and trees that are not reachable from the +repository's refs. However, because calculating object reachability is +computationally expensive, `git-upload-archive` implements a stricter +but easier-to-check set of rules: + + 1. Clients may request a commit or tree that is pointed to directly by + a ref. E.g., `git archive --remote=origin v1.0`. + + 2. Clients may request a sub-tree within a commit or tree using the + `ref:path` syntax. E.g., `git archive --remote=origin v1.0:Documentation`. + + 3. Clients may _not_ use other sha1 expressions, even if the end + result is reachable. E.g., neither a relative commit like `master^` + nor a literal sha1 like `abcd1234` is allowed, even if the result + is reachable from the refs. + +Note that rule 3 disallows many cases that do not have any privacy +implications. These rules are subject to change in future versions of +git, and the server accessed by `git archive --remote` may or may not +follow these exact rules. + +If the config option `uploadArchive.allowUnreachable` is true, these +rules are ignored, and clients may use arbitrary sha1 expressions. +This is useful if you do not care about the privacy of unreachable +objects, or if your object database is already publicly available for +access via non-smart-http. + +OPTIONS +------- +<directory>:: + The repository to get a tar archive from. + +GIT +--- +Part of the linkgit:git[1] suite diff --git a/Documentation/git-upload-pack.txt b/Documentation/git-upload-pack.txt new file mode 100644 index 0000000..0abc806 --- /dev/null +++ b/Documentation/git-upload-pack.txt @@ -0,0 +1,43 @@ +git-upload-pack(1) +================== + +NAME +---- +git-upload-pack - Send objects packed back to git-fetch-pack + + +SYNOPSIS +-------- +[verse] +'git-upload-pack' [--strict] [--timeout=<n>] <directory> + +DESCRIPTION +----------- +Invoked by 'git fetch-pack', learns what +objects the other side is missing, and sends them after packing. + +This command is usually not invoked directly by the end user. +The UI for the protocol is on the 'git fetch-pack' side, and the +program pair is meant to be used to pull updates from a remote +repository. For push operations, see 'git send-pack'. + + +OPTIONS +------- + +--strict:: + Do not try <directory>/.git/ if <directory> is no Git directory. + +--timeout=<n>:: + Interrupt transfer after <n> seconds of inactivity. + +<directory>:: + The repository to sync from. + +SEE ALSO +-------- +linkgit:gitnamespaces[7] + +GIT +--- +Part of the linkgit:git[1] suite diff --git a/Documentation/git-var.txt b/Documentation/git-var.txt new file mode 100644 index 0000000..44ff954 --- /dev/null +++ b/Documentation/git-var.txt @@ -0,0 +1,70 @@ +git-var(1) +========== + +NAME +---- +git-var - Show a Git logical variable + + +SYNOPSIS +-------- +[verse] +'git var' ( -l | <variable> ) + +DESCRIPTION +----------- +Prints a Git logical variable. + +OPTIONS +------- +-l:: + Cause the logical variables to be listed. In addition, all the + variables of the Git configuration file .git/config are listed + as well. (However, the configuration variables listing functionality + is deprecated in favor of `git config -l`.) + +EXAMPLE +-------- + $ git var GIT_AUTHOR_IDENT + Eric W. Biederman <ebiederm@lnxi.com> 1121223278 -0600 + + +VARIABLES +---------- +GIT_AUTHOR_IDENT:: + The author of a piece of code. + +GIT_COMMITTER_IDENT:: + The person who put a piece of code into Git. + +GIT_EDITOR:: + Text editor for use by Git commands. The value is meant to be + interpreted by the shell when it is used. Examples: `~/bin/vi`, + `$SOME_ENVIRONMENT_VARIABLE`, `"C:\Program Files\Vim\gvim.exe" + --nofork`. The order of preference is the `$GIT_EDITOR` + environment variable, then `core.editor` configuration, then + `$VISUAL`, then `$EDITOR`, and then the default chosen at compile + time, which is usually 'vi'. +ifdef::git-default-editor[] + The build you are using chose '{git-default-editor}' as the default. +endif::git-default-editor[] + +GIT_PAGER:: + Text viewer for use by Git commands (e.g., 'less'). The value + is meant to be interpreted by the shell. The order of preference + is the `$GIT_PAGER` environment variable, then `core.pager` + configuration, then `$PAGER`, and then the default chosen at + compile time (usually 'less'). +ifdef::git-default-pager[] + The build you are using chose '{git-default-pager}' as the default. +endif::git-default-pager[] + +SEE ALSO +-------- +linkgit:git-commit-tree[1] +linkgit:git-tag[1] +linkgit:git-config[1] + +GIT +--- +Part of the linkgit:git[1] suite diff --git a/Documentation/git-verify-commit.txt b/Documentation/git-verify-commit.txt new file mode 100644 index 0000000..ecf4da1 --- /dev/null +++ b/Documentation/git-verify-commit.txt @@ -0,0 +1,32 @@ +git-verify-commit(1) +==================== + +NAME +---- +git-verify-commit - Check the GPG signature of commits + +SYNOPSIS +-------- +[verse] +'git verify-commit' <commit>... + +DESCRIPTION +----------- +Validates the gpg signature created by 'git commit -S'. + +OPTIONS +------- +--raw:: + Print the raw gpg status output to standard error instead of the normal + human-readable output. + +-v:: +--verbose:: + Print the contents of the commit object before validating it. + +<commit>...:: + SHA-1 identifiers of Git commit objects. + +GIT +--- +Part of the linkgit:git[1] suite diff --git a/Documentation/git-verify-pack.txt b/Documentation/git-verify-pack.txt new file mode 100644 index 0000000..61ca6d0 --- /dev/null +++ b/Documentation/git-verify-pack.txt @@ -0,0 +1,53 @@ +git-verify-pack(1) +================== + +NAME +---- +git-verify-pack - Validate packed Git archive files + + +SYNOPSIS +-------- +[verse] +'git verify-pack' [-v|--verbose] [-s|--stat-only] [--] <pack>.idx ... + + +DESCRIPTION +----------- +Reads given idx file for packed Git archive created with the +'git pack-objects' command and verifies idx file and the +corresponding pack file. + +OPTIONS +------- +<pack>.idx ...:: + The idx files to verify. + +-v:: +--verbose:: + After verifying the pack, show list of objects contained + in the pack and a histogram of delta chain length. + +-s:: +--stat-only:: + Do not verify the pack contents; only show the histogram of delta + chain length. With `--verbose`, list of objects is also shown. + +\--:: + Do not interpret any more arguments as options. + +OUTPUT FORMAT +------------- +When specifying the -v option the format used is: + + SHA-1 type size size-in-packfile offset-in-packfile + +for objects that are not deltified in the pack, and + + SHA-1 type size size-in-packfile offset-in-packfile depth base-SHA-1 + +for objects that are deltified. + +GIT +--- +Part of the linkgit:git[1] suite diff --git a/Documentation/git-verify-tag.txt b/Documentation/git-verify-tag.txt new file mode 100644 index 0000000..d590edc --- /dev/null +++ b/Documentation/git-verify-tag.txt @@ -0,0 +1,32 @@ +git-verify-tag(1) +================= + +NAME +---- +git-verify-tag - Check the GPG signature of tags + +SYNOPSIS +-------- +[verse] +'git verify-tag' <tag>... + +DESCRIPTION +----------- +Validates the gpg signature created by 'git tag'. + +OPTIONS +------- +--raw:: + Print the raw gpg status output to standard error instead of the normal + human-readable output. + +-v:: +--verbose:: + Print the contents of the tag object before validating it. + +<tag>...:: + SHA-1 identifiers of Git tag objects. + +GIT +--- +Part of the linkgit:git[1] suite diff --git a/Documentation/git-web--browse.txt b/Documentation/git-web--browse.txt new file mode 100644 index 0000000..16ede5b --- /dev/null +++ b/Documentation/git-web--browse.txt @@ -0,0 +1,124 @@ +git-web{litdd}browse(1) +======================= + +NAME +---- +git-web--browse - Git helper script to launch a web browser + +SYNOPSIS +-------- +[verse] +'git web{litdd}browse' [OPTIONS] URL/FILE ... + +DESCRIPTION +----------- + +This script tries, as much as possible, to display the URLs and FILEs +that are passed as arguments, as HTML pages in new tabs on an already +opened web browser. + +The following browsers (or commands) are currently supported: + +* firefox (this is the default under X Window when not using KDE) +* iceweasel +* seamonkey +* iceape +* chromium (also supported as chromium-browser) +* google-chrome (also supported as chrome) +* konqueror (this is the default under KDE, see 'Note about konqueror' below) +* opera +* w3m (this is the default outside graphical environments) +* elinks +* links +* lynx +* dillo +* open (this is the default under Mac OS X GUI) +* start (this is the default under MinGW) +* cygstart (this is the default under Cygwin) +* xdg-open + +Custom commands may also be specified. + +OPTIONS +------- +-b <browser>:: +--browser=<browser>:: + Use the specified browser. It must be in the list of supported + browsers. + +-t <browser>:: +--tool=<browser>:: + Same as above. + +-c <conf.var>:: +--config=<conf.var>:: + CONF.VAR is looked up in the Git config files. If it's set, + then its value specifies the browser that should be used. + +CONFIGURATION VARIABLES +----------------------- + +CONF.VAR (from -c option) and web.browser +~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ + +The web browser can be specified using a configuration variable passed +with the -c (or --config) command-line option, or the 'web.browser' +configuration variable if the former is not used. + +browser.<tool>.path +~~~~~~~~~~~~~~~~~~~ + +You can explicitly provide a full path to your preferred browser by +setting the configuration variable 'browser.<tool>.path'. For example, +you can configure the absolute path to firefox by setting +'browser.firefox.path'. Otherwise, 'git web{litdd}browse' assumes the tool +is available in PATH. + +browser.<tool>.cmd +~~~~~~~~~~~~~~~~~~ + +When the browser, specified by options or configuration variables, is +not among the supported ones, then the corresponding +'browser.<tool>.cmd' configuration variable will be looked up. If this +variable exists then 'git web{litdd}browse' will treat the specified tool +as a custom command and will use a shell eval to run the command with +the URLs passed as arguments. + +Note about konqueror +-------------------- + +When 'konqueror' is specified by a command-line option or a +configuration variable, we launch 'kfmclient' to try to open the HTML +man page on an already opened konqueror in a new tab if possible. + +For consistency, we also try such a trick if 'browser.konqueror.path' is +set to something like 'A_PATH_TO/konqueror'. That means we will try to +launch 'A_PATH_TO/kfmclient' instead. + +If you really want to use 'konqueror', then you can use something like +the following: + +------------------------------------------------ + [web] + browser = konq + + [browser "konq"] + cmd = A_PATH_TO/konqueror +------------------------------------------------ + +Note about git-config --global +~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ + +Note that these configuration variables should probably be set using +the '--global' flag, for example like this: + +------------------------------------------------ +$ git config --global web.browser firefox +------------------------------------------------ + +as they are probably more user specific than repository specific. +See linkgit:git-config[1] for more information about this. + +GIT +--- +Part of the linkgit:git[1] suite diff --git a/Documentation/git-whatchanged.txt b/Documentation/git-whatchanged.txt new file mode 100644 index 0000000..8b63ceb --- /dev/null +++ b/Documentation/git-whatchanged.txt @@ -0,0 +1,43 @@ +git-whatchanged(1) +================== + +NAME +---- +git-whatchanged - Show logs with difference each commit introduces + + +SYNOPSIS +-------- +[verse] +'git whatchanged' <option>... + +DESCRIPTION +----------- + +Shows commit logs and diff output each commit introduces. + +New users are encouraged to use linkgit:git-log[1] instead. The +`whatchanged` command is essentially the same as linkgit:git-log[1] +but defaults to show the raw format diff output and to skip merges. + +The command is kept primarily for historical reasons; fingers of +many people who learned Git long before `git log` was invented by +reading Linux kernel mailing list are trained to type it. + + +Examples +-------- +`git whatchanged -p v2.6.12.. include/scsi drivers/scsi`:: + + Show as patches the commits since version 'v2.6.12' that changed + any file in the include/scsi or drivers/scsi subdirectories + +`git whatchanged --since="2 weeks ago" -- gitk`:: + + Show the changes during the last two weeks to the file 'gitk'. + The "--" is necessary to avoid confusion with the *branch* named + 'gitk' + +GIT +--- +Part of the linkgit:git[1] suite diff --git a/Documentation/git-worktree.txt b/Documentation/git-worktree.txt new file mode 100644 index 0000000..62c76c1 --- /dev/null +++ b/Documentation/git-worktree.txt @@ -0,0 +1,228 @@ +git-worktree(1) +=============== + +NAME +---- +git-worktree - Manage multiple working trees + + +SYNOPSIS +-------- +[verse] +'git worktree add' [-f] [--detach] [-b <new-branch>] <path> [<branch>] +'git worktree prune' [-n] [-v] [--expire <expire>] +'git worktree list' [--porcelain] + +DESCRIPTION +----------- + +Manage multiple working trees attached to the same repository. + +A git repository can support multiple working trees, allowing you to check +out more than one branch at a time. With `git worktree add` a new working +tree is associated with the repository. This new working tree is called a +"linked working tree" as opposed to the "main working tree" prepared by "git +init" or "git clone". A repository has one main working tree (if it's not a +bare repository) and zero or more linked working trees. + +When you are done with a linked working tree you can simply delete it. +The working tree's administrative files in the repository (see +"DETAILS" below) will eventually be removed automatically (see +`gc.worktreePruneExpire` in linkgit:git-config[1]), or you can run +`git worktree prune` in the main or any linked working tree to +clean up any stale administrative files. + +If you move a linked working tree, you need to manually update the +administrative files so that they do not get pruned automatically. See +section "DETAILS" for more information. + +If a linked working tree is stored on a portable device or network share +which is not always mounted, you can prevent its administrative files from +being pruned by creating a file named 'locked' alongside the other +administrative files, optionally containing a plain text reason that +pruning should be suppressed. See section "DETAILS" for more information. + +COMMANDS +-------- +add <path> [<branch>]:: + +Create `<path>` and checkout `<branch>` into it. The new working directory +is linked to the current repository, sharing everything except working +directory specific files such as HEAD, index, etc. ++ +If `<branch>` is omitted and neither `-b` nor `-B` nor `--detached` used, +then, as a convenience, a new branch based at HEAD is created automatically, +as if `-b $(basename <path>)` was specified. + +prune:: + +Prune working tree information in $GIT_DIR/worktrees. + +list:: + +List details of each worktree. The main worktree is listed first, followed by +each of the linked worktrees. The output details include if the worktree is +bare, the revision currently checked out, and the branch currently checked out +(or 'detached HEAD' if none). + +OPTIONS +------- + +-f:: +--force:: + By default, `add` refuses to create a new working tree when `<branch>` + is already checked out by another working tree. This option overrides + that safeguard. + +-b <new-branch>:: +-B <new-branch>:: + With `add`, create a new branch named `<new-branch>` starting at + `<branch>`, and check out `<new-branch>` into the new working tree. + If `<branch>` is omitted, it defaults to HEAD. + By default, `-b` refuses to create a new branch if it already + exists. `-B` overrides this safeguard, resetting `<new-branch>` to + `<branch>`. + +--detach:: + With `add`, detach HEAD in the new working tree. See "DETACHED HEAD" + in linkgit:git-checkout[1]. + +-n:: +--dry-run:: + With `prune`, do not remove anything; just report what it would + remove. + +--porcelain:: + With `list`, output in an easy-to-parse format for scripts. + This format will remain stable across Git versions and regardless of user + configuration. See below for details. + +-v:: +--verbose:: + With `prune`, report all removals. + +--expire <time>:: + With `prune`, only expire unused working trees older than <time>. + +DETAILS +------- +Each linked working tree has a private sub-directory in the repository's +$GIT_DIR/worktrees directory. The private sub-directory's name is usually +the base name of the linked working tree's path, possibly appended with a +number to make it unique. For example, when `$GIT_DIR=/path/main/.git` the +command `git worktree add /path/other/test-next next` creates the linked +working tree in `/path/other/test-next` and also creates a +`$GIT_DIR/worktrees/test-next` directory (or `$GIT_DIR/worktrees/test-next1` +if `test-next` is already taken). + +Within a linked working tree, $GIT_DIR is set to point to this private +directory (e.g. `/path/main/.git/worktrees/test-next` in the example) and +$GIT_COMMON_DIR is set to point back to the main working tree's $GIT_DIR +(e.g. `/path/main/.git`). These settings are made in a `.git` file located at +the top directory of the linked working tree. + +Path resolution via `git rev-parse --git-path` uses either +$GIT_DIR or $GIT_COMMON_DIR depending on the path. For example, in the +linked working tree `git rev-parse --git-path HEAD` returns +`/path/main/.git/worktrees/test-next/HEAD` (not +`/path/other/test-next/.git/HEAD` or `/path/main/.git/HEAD`) while `git +rev-parse --git-path refs/heads/master` uses +$GIT_COMMON_DIR and returns `/path/main/.git/refs/heads/master`, +since refs are shared across all working trees. + +See linkgit:gitrepository-layout[5] for more information. The rule of +thumb is do not make any assumption about whether a path belongs to +$GIT_DIR or $GIT_COMMON_DIR when you need to directly access something +inside $GIT_DIR. Use `git rev-parse --git-path` to get the final path. + +If you move a linked working tree, you need to update the 'gitdir' file +in the entry's directory. For example, if a linked working tree is moved +to `/newpath/test-next` and its `.git` file points to +`/path/main/.git/worktrees/test-next`, then update +`/path/main/.git/worktrees/test-next/gitdir` to reference `/newpath/test-next` +instead. + +To prevent a $GIT_DIR/worktrees entry from being pruned (which +can be useful in some situations, such as when the +entry's working tree is stored on a portable device), add a file named +'locked' to the entry's directory. The file contains the reason in +plain text. For example, if a linked working tree's `.git` file points +to `/path/main/.git/worktrees/test-next` then a file named +`/path/main/.git/worktrees/test-next/locked` will prevent the +`test-next` entry from being pruned. See +linkgit:gitrepository-layout[5] for details. + +LIST OUTPUT FORMAT +------------------ +The worktree list command has two output formats. The default format shows the +details on a single line with columns. For example: + +------------ +S git worktree list +/path/to/bare-source (bare) +/path/to/linked-worktree abcd1234 [master] +/path/to/other-linked-worktree 1234abc (detached HEAD) +------------ + +Porcelain Format +~~~~~~~~~~~~~~~~ +The porcelain format has a line per attribute. Attributes are listed with a +label and value separated by a single space. Boolean attributes (like 'bare' +and 'detached') are listed as a label only, and are only present if and only +if the value is true. An empty line indicates the end of a worktree. For +example: + +------------ +S git worktree list --porcelain +worktree /path/to/bare-source +bare + +worktree /path/to/linked-worktree +HEAD abcd1234abcd1234abcd1234abcd1234abcd1234 +branch refs/heads/master + +worktree /path/to/other-linked-worktree +HEAD 1234abc1234abc1234abc1234abc1234abc1234a +detached + +------------ + +EXAMPLES +-------- +You are in the middle of a refactoring session and your boss comes in and +demands that you fix something immediately. You might typically use +linkgit:git-stash[1] to store your changes away temporarily, however, your +working tree is in such a state of disarray (with new, moved, and removed +files, and other bits and pieces strewn around) that you don't want to risk +disturbing any of it. Instead, you create a temporary linked working tree to +make the emergency fix, remove it when done, and then resume your earlier +refactoring session. + +------------ +$ git worktree add -b emergency-fix ../temp master +$ pushd ../temp +# ... hack hack hack ... +$ git commit -a -m 'emergency fix for boss' +$ popd +$ rm -rf ../temp +$ git worktree prune +------------ + +BUGS +---- +Multiple checkout in general is still experimental, and the support +for submodules is incomplete. It is NOT recommended to make multiple +checkouts of a superproject. + +git-worktree could provide more automation for tasks currently +performed manually, such as: + +- `remove` to remove a linked working tree and its administrative files (and + warn if the working tree is dirty) +- `mv` to move or rename a working tree and update its administrative files +- `lock` to prevent automatic pruning of administrative files (for instance, + for a working tree on a portable device) + +GIT +--- +Part of the linkgit:git[1] suite diff --git a/Documentation/git-write-tree.txt b/Documentation/git-write-tree.txt new file mode 100644 index 0000000..f22041a --- /dev/null +++ b/Documentation/git-write-tree.txt @@ -0,0 +1,42 @@ +git-write-tree(1) +================= + +NAME +---- +git-write-tree - Create a tree object from the current index + + +SYNOPSIS +-------- +[verse] +'git write-tree' [--missing-ok] [--prefix=<prefix>/] + +DESCRIPTION +----------- +Creates a tree object using the current index. The name of the new +tree object is printed to standard output. + +The index must be in a fully merged state. + +Conceptually, 'git write-tree' sync()s the current index contents +into a set of tree files. +In order to have that match what is actually in your directory right +now, you need to have done a 'git update-index' phase before you did the +'git write-tree'. + + +OPTIONS +------- +--missing-ok:: + Normally 'git write-tree' ensures that the objects referenced by the + directory exist in the object database. This option disables this + check. + +--prefix=<prefix>/:: + Writes a tree object that represents a subdirectory + `<prefix>`. This can be used to write the tree object + for a subproject that is in the named subdirectory. + +GIT +--- +Part of the linkgit:git[1] suite diff --git a/Documentation/git.txt b/Documentation/git.txt new file mode 100644 index 0000000..5a10e9b --- /dev/null +++ b/Documentation/git.txt @@ -0,0 +1,1253 @@ +git(1) +====== + +NAME +---- +git - the stupid content tracker + + +SYNOPSIS +-------- +[verse] +'git' [--version] [--help] [-C <path>] [-c <name>=<value>] + [--exec-path[=<path>]] [--html-path] [--man-path] [--info-path] + [-p|--paginate|--no-pager] [--no-replace-objects] [--bare] + [--git-dir=<path>] [--work-tree=<path>] [--namespace=<name>] + <command> [<args>] + +DESCRIPTION +----------- +Git is a fast, scalable, distributed revision control system with an +unusually rich command set that provides both high-level operations +and full access to internals. + +See linkgit:gittutorial[7] to get started, then see +linkgit:giteveryday[7] for a useful minimum set of +commands. The link:user-manual.html[Git User's Manual] has a more +in-depth introduction. + +After you mastered the basic concepts, you can come back to this +page to learn what commands Git offers. You can learn more about +individual Git commands with "git help command". linkgit:gitcli[7] +manual page gives you an overview of the command-line command syntax. + +Formatted and hyperlinked version of the latest Git documentation +can be viewed at `http://git-htmldocs.googlecode.com/git/git.html`. + +ifdef::stalenotes[] +[NOTE] +============ + +You are reading the documentation for the latest (possibly +unreleased) version of Git, that is available from the 'master' +branch of the `git.git` repository. +Documentation for older releases are available here: + +* link:v2.8.4/git.html[documentation for release 2.8.4] + +* release notes for + link:RelNotes/2.8.4.txt[2.8.4], + link:RelNotes/2.8.3.txt[2.8.3], + link:RelNotes/2.8.2.txt[2.8.2], + link:RelNotes/2.8.1.txt[2.8.1], + link:RelNotes/2.8.0.txt[2.8]. + +* link:v2.7.3/git.html[documentation for release 2.7.3] + +* release notes for + link:RelNotes/2.7.3.txt[2.7.3], + link:RelNotes/2.7.2.txt[2.7.2], + link:RelNotes/2.7.1.txt[2.7.1], + link:RelNotes/2.7.0.txt[2.7]. + +* link:v2.6.6/git.html[documentation for release 2.6.6] + +* release notes for + link:RelNotes/2.6.6.txt[2.6.6], + link:RelNotes/2.6.5.txt[2.6.5], + link:RelNotes/2.6.4.txt[2.6.4], + link:RelNotes/2.6.3.txt[2.6.3], + link:RelNotes/2.6.2.txt[2.6.2], + link:RelNotes/2.6.1.txt[2.6.1], + link:RelNotes/2.6.0.txt[2.6]. + +* link:v2.5.5/git.html[documentation for release 2.5.5] + +* release notes for + link:RelNotes/2.5.5.txt[2.5.5], + link:RelNotes/2.5.4.txt[2.5.4], + link:RelNotes/2.5.3.txt[2.5.3], + link:RelNotes/2.5.2.txt[2.5.2], + link:RelNotes/2.5.1.txt[2.5.1], + link:RelNotes/2.5.0.txt[2.5]. + +* link:v2.4.11/git.html[documentation for release 2.4.11] + +* release notes for + link:RelNotes/2.4.11.txt[2.4.11], + link:RelNotes/2.4.10.txt[2.4.10], + link:RelNotes/2.4.9.txt[2.4.9], + link:RelNotes/2.4.8.txt[2.4.8], + link:RelNotes/2.4.7.txt[2.4.7], + link:RelNotes/2.4.6.txt[2.4.6], + link:RelNotes/2.4.5.txt[2.4.5], + link:RelNotes/2.4.4.txt[2.4.4], + link:RelNotes/2.4.3.txt[2.4.3], + link:RelNotes/2.4.2.txt[2.4.2], + link:RelNotes/2.4.1.txt[2.4.1], + link:RelNotes/2.4.0.txt[2.4]. + +* link:v2.3.10/git.html[documentation for release 2.3.10] + +* release notes for + link:RelNotes/2.3.10.txt[2.3.10], + link:RelNotes/2.3.9.txt[2.3.9], + link:RelNotes/2.3.8.txt[2.3.8], + link:RelNotes/2.3.7.txt[2.3.7], + link:RelNotes/2.3.6.txt[2.3.6], + link:RelNotes/2.3.5.txt[2.3.5], + link:RelNotes/2.3.4.txt[2.3.4], + link:RelNotes/2.3.3.txt[2.3.3], + link:RelNotes/2.3.2.txt[2.3.2], + link:RelNotes/2.3.1.txt[2.3.1], + link:RelNotes/2.3.0.txt[2.3]. + +* link:v2.2.3/git.html[documentation for release 2.2.3] + +* release notes for + link:RelNotes/2.2.3.txt[2.2.3], + link:RelNotes/2.2.2.txt[2.2.2], + link:RelNotes/2.2.1.txt[2.2.1], + link:RelNotes/2.2.0.txt[2.2]. + +* link:v2.1.4/git.html[documentation for release 2.1.4] + +* release notes for + link:RelNotes/2.1.4.txt[2.1.4], + link:RelNotes/2.1.3.txt[2.1.3], + link:RelNotes/2.1.2.txt[2.1.2], + 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If the option '--all' or '-a' is given then all + available commands are printed. If a Git command is named this + option will bring up the manual page for that command. ++ +Other options are available to control how the manual page is +displayed. See linkgit:git-help[1] for more information, +because `git --help ...` is converted internally into `git +help ...`. + +-C <path>:: + Run as if git was started in '<path>' instead of the current working + directory. When multiple `-C` options are given, each subsequent + non-absolute `-C <path>` is interpreted relative to the preceding `-C + <path>`. ++ +This option affects options that expect path name like `--git-dir` and +`--work-tree` in that their interpretations of the path names would be +made relative to the working directory caused by the `-C` option. For +example the following invocations are equivalent: + + git --git-dir=a.git --work-tree=b -C c status + git --git-dir=c/a.git --work-tree=c/b status + +-c <name>=<value>:: + Pass a configuration parameter to the command. The value + given will override values from configuration files. + The <name> is expected in the same format as listed by + 'git config' (subkeys separated by dots). ++ +Note that omitting the `=` in `git -c foo.bar ...` is allowed and sets +`foo.bar` to the boolean true value (just like `[foo]bar` would in a +config file). Including the equals but with an empty value (like `git -c +foo.bar= ...`) sets `foo.bar` to the empty string. + +--exec-path[=<path>]:: + Path to wherever your core Git programs are installed. + This can also be controlled by setting the GIT_EXEC_PATH + environment variable. If no path is given, 'git' will print + the current setting and then exit. + +--html-path:: + Print the path, without trailing slash, where Git's HTML + documentation is installed and exit. + +--man-path:: + Print the manpath (see `man(1)`) for the man pages for + this version of Git and exit. + +--info-path:: + Print the path where the Info files documenting this + version of Git are installed and exit. + +-p:: +--paginate:: + Pipe all output into 'less' (or if set, $PAGER) if standard + output is a terminal. This overrides the `pager.<cmd>` + configuration options (see the "Configuration Mechanism" section + below). + +--no-pager:: + Do not pipe Git output into a pager. + +--git-dir=<path>:: + Set the path to the repository. This can also be controlled by + setting the GIT_DIR environment variable. It can be an absolute + path or relative path to current working directory. + +--work-tree=<path>:: + Set the path to the working tree. It can be an absolute path + or a path relative to the current working directory. + This can also be controlled by setting the GIT_WORK_TREE + environment variable and the core.worktree configuration + variable (see core.worktree in linkgit:git-config[1] for a + more detailed discussion). + +--namespace=<path>:: + Set the Git namespace. See linkgit:gitnamespaces[7] for more + details. Equivalent to setting the `GIT_NAMESPACE` environment + variable. + +--bare:: + Treat the repository as a bare repository. If GIT_DIR + environment is not set, it is set to the current working + directory. + +--no-replace-objects:: + Do not use replacement refs to replace Git objects. See + linkgit:git-replace[1] for more information. + +--literal-pathspecs:: + Treat pathspecs literally (i.e. no globbing, no pathspec magic). + This is equivalent to setting the `GIT_LITERAL_PATHSPECS` environment + variable to `1`. + +--glob-pathspecs:: + Add "glob" magic to all pathspec. This is equivalent to setting + the `GIT_GLOB_PATHSPECS` environment variable to `1`. Disabling + globbing on individual pathspecs can be done using pathspec + magic ":(literal)" + +--noglob-pathspecs:: + Add "literal" magic to all pathspec. This is equivalent to setting + the `GIT_NOGLOB_PATHSPECS` environment variable to `1`. Enabling + globbing on individual pathspecs can be done using pathspec + magic ":(glob)" + +--icase-pathspecs:: + Add "icase" magic to all pathspec. This is equivalent to setting + the `GIT_ICASE_PATHSPECS` environment variable to `1`. + +GIT COMMANDS +------------ + +We divide Git into high level ("porcelain") commands and low level +("plumbing") commands. + +High-level commands (porcelain) +------------------------------- + +We separate the porcelain commands into the main commands and some +ancillary user utilities. + +Main porcelain commands +~~~~~~~~~~~~~~~~~~~~~~~ + +include::cmds-mainporcelain.txt[] + +Ancillary Commands +~~~~~~~~~~~~~~~~~~ +Manipulators: + +include::cmds-ancillarymanipulators.txt[] + +Interrogators: + +include::cmds-ancillaryinterrogators.txt[] + + +Interacting with Others +~~~~~~~~~~~~~~~~~~~~~~~ + +These commands are to interact with foreign SCM and with other +people via patch over e-mail. + +include::cmds-foreignscminterface.txt[] + + +Low-level commands (plumbing) +----------------------------- + +Although Git includes its +own porcelain layer, its low-level commands are sufficient to support +development of alternative porcelains. Developers of such porcelains +might start by reading about linkgit:git-update-index[1] and +linkgit:git-read-tree[1]. + +The interface (input, output, set of options and the semantics) +to these low-level commands are meant to be a lot more stable +than Porcelain level commands, because these commands are +primarily for scripted use. The interface to Porcelain commands +on the other hand are subject to change in order to improve the +end user experience. + +The following description divides +the low-level commands into commands that manipulate objects (in +the repository, index, and working tree), commands that interrogate and +compare objects, and commands that move objects and references between +repositories. + + +Manipulation commands +~~~~~~~~~~~~~~~~~~~~~ + +include::cmds-plumbingmanipulators.txt[] + + +Interrogation commands +~~~~~~~~~~~~~~~~~~~~~~ + +include::cmds-plumbinginterrogators.txt[] + +In general, the interrogate commands do not touch the files in +the working tree. + + +Synching repositories +~~~~~~~~~~~~~~~~~~~~~ + +include::cmds-synchingrepositories.txt[] + +The following are helper commands used by the above; end users +typically do not use them directly. + +include::cmds-synchelpers.txt[] + + +Internal helper commands +~~~~~~~~~~~~~~~~~~~~~~~~ + +These are internal helper commands used by other commands; end +users typically do not use them directly. + +include::cmds-purehelpers.txt[] + + +Configuration Mechanism +----------------------- + +Git uses a simple text format to store customizations that are per +repository and are per user. Such a configuration file may look +like this: + +------------ +# +# A '#' or ';' character indicates a comment. +# + +; core variables +[core] + ; Don't trust file modes + filemode = false + +; user identity +[user] + name = "Junio C Hamano" + email = "gitster@pobox.com" + +------------ + +Various commands read from the configuration file and adjust +their operation accordingly. See linkgit:git-config[1] for a +list and more details about the configuration mechanism. + + +Identifier Terminology +---------------------- +<object>:: + Indicates the object name for any type of object. + +<blob>:: + Indicates a blob object name. + +<tree>:: + Indicates a tree object name. + +<commit>:: + Indicates a commit object name. + +<tree-ish>:: + Indicates a tree, commit or tag object name. A + command that takes a <tree-ish> argument ultimately wants to + operate on a <tree> object but automatically dereferences + <commit> and <tag> objects that point at a <tree>. + +<commit-ish>:: + Indicates a commit or tag object name. A + command that takes a <commit-ish> argument ultimately wants to + operate on a <commit> object but automatically dereferences + <tag> objects that point at a <commit>. + +<type>:: + Indicates that an object type is required. + Currently one of: `blob`, `tree`, `commit`, or `tag`. + +<file>:: + Indicates a filename - almost always relative to the + root of the tree structure `GIT_INDEX_FILE` describes. + +Symbolic Identifiers +-------------------- +Any Git command accepting any <object> can also use the following +symbolic notation: + +HEAD:: + indicates the head of the current branch. + +<tag>:: + a valid tag 'name' + (i.e. a `refs/tags/<tag>` reference). + +<head>:: + a valid head 'name' + (i.e. a `refs/heads/<head>` reference). + +For a more complete list of ways to spell object names, see +"SPECIFYING REVISIONS" section in linkgit:gitrevisions[7]. + + +File/Directory Structure +------------------------ + +Please see the linkgit:gitrepository-layout[5] document. + +Read linkgit:githooks[5] for more details about each hook. + +Higher level SCMs may provide and manage additional information in the +`$GIT_DIR`. + + +Terminology +----------- +Please see linkgit:gitglossary[7]. + + +Environment Variables +--------------------- +Various Git commands use the following environment variables: + +The Git Repository +~~~~~~~~~~~~~~~~~~ +These environment variables apply to 'all' core Git commands. Nb: it +is worth noting that they may be used/overridden by SCMS sitting above +Git so take care if using a foreign front-end. + +'GIT_INDEX_FILE':: + This environment allows the specification of an alternate + index file. If not specified, the default of `$GIT_DIR/index` + is used. + +'GIT_INDEX_VERSION':: + This environment variable allows the specification of an index + version for new repositories. It won't affect existing index + files. By default index file version 2 or 3 is used. See + linkgit:git-update-index[1] for more information. + +'GIT_OBJECT_DIRECTORY':: + If the object storage directory is specified via this + environment variable then the sha1 directories are created + underneath - otherwise the default `$GIT_DIR/objects` + directory is used. + +'GIT_ALTERNATE_OBJECT_DIRECTORIES':: + Due to the immutable nature of Git objects, old objects can be + archived into shared, read-only directories. This variable + specifies a ":" separated (on Windows ";" separated) list + of Git object directories which can be used to search for Git + objects. New objects will not be written to these directories. + +'GIT_DIR':: + If the 'GIT_DIR' environment variable is set then it + specifies a path to use instead of the default `.git` + for the base of the repository. + The '--git-dir' command-line option also sets this value. + +'GIT_WORK_TREE':: + Set the path to the root of the working tree. + This can also be controlled by the '--work-tree' command-line + option and the core.worktree configuration variable. + +'GIT_NAMESPACE':: + Set the Git namespace; see linkgit:gitnamespaces[7] for details. + The '--namespace' command-line option also sets this value. + +'GIT_CEILING_DIRECTORIES':: + This should be a colon-separated list of absolute paths. If + set, it is a list of directories that Git should not chdir up + into while looking for a repository directory (useful for + excluding slow-loading network directories). It will not + exclude the current working directory or a GIT_DIR set on the + command line or in the environment. Normally, Git has to read + the entries in this list and resolve any symlink that + might be present in order to compare them with the current + directory. However, if even this access is slow, you + can add an empty entry to the list to tell Git that the + subsequent entries are not symlinks and needn't be resolved; + e.g., + 'GIT_CEILING_DIRECTORIES=/maybe/symlink::/very/slow/non/symlink'. + +'GIT_DISCOVERY_ACROSS_FILESYSTEM':: + When run in a directory that does not have ".git" repository + directory, Git tries to find such a directory in the parent + directories to find the top of the working tree, but by default it + does not cross filesystem boundaries. This environment variable + can be set to true to tell Git not to stop at filesystem + boundaries. Like 'GIT_CEILING_DIRECTORIES', this will not affect + an explicit repository directory set via 'GIT_DIR' or on the + command line. + +'GIT_COMMON_DIR':: + If this variable is set to a path, non-worktree files that are + normally in $GIT_DIR will be taken from this path + instead. Worktree-specific files such as HEAD or index are + taken from $GIT_DIR. See linkgit:gitrepository-layout[5] and + linkgit:git-worktree[1] for + details. This variable has lower precedence than other path + variables such as GIT_INDEX_FILE, GIT_OBJECT_DIRECTORY... + +Git Commits +~~~~~~~~~~~ +'GIT_AUTHOR_NAME':: +'GIT_AUTHOR_EMAIL':: +'GIT_AUTHOR_DATE':: +'GIT_COMMITTER_NAME':: +'GIT_COMMITTER_EMAIL':: +'GIT_COMMITTER_DATE':: +'EMAIL':: + see linkgit:git-commit-tree[1] + +Git Diffs +~~~~~~~~~ +'GIT_DIFF_OPTS':: + Only valid setting is "--unified=??" or "-u??" to set the + number of context lines shown when a unified diff is created. + This takes precedence over any "-U" or "--unified" option + value passed on the Git diff command line. + +'GIT_EXTERNAL_DIFF':: + When the environment variable 'GIT_EXTERNAL_DIFF' is set, the + program named by it is called, instead of the diff invocation + described above. For a path that is added, removed, or modified, + 'GIT_EXTERNAL_DIFF' is called with 7 parameters: + + path old-file old-hex old-mode new-file new-hex new-mode ++ +where: + + <old|new>-file:: are files GIT_EXTERNAL_DIFF can use to read the + contents of <old|new>, + <old|new>-hex:: are the 40-hexdigit SHA-1 hashes, + <old|new>-mode:: are the octal representation of the file modes. ++ +The file parameters can point at the user's working file +(e.g. `new-file` in "git-diff-files"), `/dev/null` (e.g. `old-file` +when a new file is added), or a temporary file (e.g. `old-file` in the +index). 'GIT_EXTERNAL_DIFF' should not worry about unlinking the +temporary file --- it is removed when 'GIT_EXTERNAL_DIFF' exits. ++ +For a path that is unmerged, 'GIT_EXTERNAL_DIFF' is called with 1 +parameter, <path>. ++ +For each path 'GIT_EXTERNAL_DIFF' is called, two environment variables, +'GIT_DIFF_PATH_COUNTER' and 'GIT_DIFF_PATH_TOTAL' are set. + +'GIT_DIFF_PATH_COUNTER':: + A 1-based counter incremented by one for every path. + +'GIT_DIFF_PATH_TOTAL':: + The total number of paths. + +other +~~~~~ +'GIT_MERGE_VERBOSITY':: + A number controlling the amount of output shown by + the recursive merge strategy. Overrides merge.verbosity. + See linkgit:git-merge[1] + +'GIT_PAGER':: + This environment variable overrides `$PAGER`. If it is set + to an empty string or to the value "cat", Git will not launch + a pager. See also the `core.pager` option in + linkgit:git-config[1]. + +'GIT_EDITOR':: + This environment variable overrides `$EDITOR` and `$VISUAL`. + It is used by several Git commands when, on interactive mode, + an editor is to be launched. See also linkgit:git-var[1] + and the `core.editor` option in linkgit:git-config[1]. + +'GIT_SSH':: +'GIT_SSH_COMMAND':: + If either of these environment variables is set then 'git fetch' + and 'git push' will use the specified command instead of 'ssh' + when they need to connect to a remote system. + The command will be given exactly two or four arguments: the + 'username@host' (or just 'host') from the URL and the shell + command to execute on that remote system, optionally preceded by + '-p' (literally) and the 'port' from the URL when it specifies + something other than the default SSH port. ++ +`$GIT_SSH_COMMAND` takes precedence over `$GIT_SSH`, and is interpreted +by the shell, which allows additional arguments to be included. +`$GIT_SSH` on the other hand must be just the path to a program +(which can be a wrapper shell script, if additional arguments are +needed). ++ +Usually it is easier to configure any desired options through your +personal `.ssh/config` file. Please consult your ssh documentation +for further details. + +'GIT_ASKPASS':: + If this environment variable is set, then Git commands which need to + acquire passwords or passphrases (e.g. for HTTP or IMAP authentication) + will call this program with a suitable prompt as command-line argument + and read the password from its STDOUT. See also the 'core.askPass' + option in linkgit:git-config[1]. + +'GIT_TERMINAL_PROMPT':: + If this environment variable is set to `0`, git will not prompt + on the terminal (e.g., when asking for HTTP authentication). + +'GIT_CONFIG_NOSYSTEM':: + Whether to skip reading settings from the system-wide + `$(prefix)/etc/gitconfig` file. This environment variable can + be used along with `$HOME` and `$XDG_CONFIG_HOME` to create a + predictable environment for a picky script, or you can set it + temporarily to avoid using a buggy `/etc/gitconfig` file while + waiting for someone with sufficient permissions to fix it. + +'GIT_FLUSH':: + If this environment variable is set to "1", then commands such + as 'git blame' (in incremental mode), 'git rev-list', 'git log', + 'git check-attr' and 'git check-ignore' will + force a flush of the output stream after each record have been + flushed. If this + variable is set to "0", the output of these commands will be done + using completely buffered I/O. If this environment variable is + not set, Git will choose buffered or record-oriented flushing + based on whether stdout appears to be redirected to a file or not. + +'GIT_TRACE':: + Enables general trace messages, e.g. alias expansion, built-in + command execution and external command execution. ++ +If this variable is set to "1", "2" or "true" (comparison +is case insensitive), trace messages will be printed to +stderr. ++ +If the variable is set to an integer value greater than 2 +and lower than 10 (strictly) then Git will interpret this +value as an open file descriptor and will try to write the +trace messages into this file descriptor. ++ +Alternatively, if the variable is set to an absolute path +(starting with a '/' character), Git will interpret this +as a file path and will try to write the trace messages +into it. ++ +Unsetting the variable, or setting it to empty, "0" or +"false" (case insensitive) disables trace messages. + +'GIT_TRACE_PACK_ACCESS':: + Enables trace messages for all accesses to any packs. For each + access, the pack file name and an offset in the pack is + recorded. This may be helpful for troubleshooting some + pack-related performance problems. + See 'GIT_TRACE' for available trace output options. + +'GIT_TRACE_PACKET':: + Enables trace messages for all packets coming in or out of a + given program. This can help with debugging object negotiation + or other protocol issues. Tracing is turned off at a packet + starting with "PACK" (but see 'GIT_TRACE_PACKFILE' below). + See 'GIT_TRACE' for available trace output options. + +'GIT_TRACE_PACKFILE':: + Enables tracing of packfiles sent or received by a + given program. Unlike other trace output, this trace is + verbatim: no headers, and no quoting of binary data. You almost + certainly want to direct into a file (e.g., + `GIT_TRACE_PACKFILE=/tmp/my.pack`) rather than displaying it on + the terminal or mixing it with other trace output. ++ +Note that this is currently only implemented for the client side +of clones and fetches. + +'GIT_TRACE_PERFORMANCE':: + Enables performance related trace messages, e.g. total execution + time of each Git command. + See 'GIT_TRACE' for available trace output options. + +'GIT_TRACE_SETUP':: + Enables trace messages printing the .git, working tree and current + working directory after Git has completed its setup phase. + See 'GIT_TRACE' for available trace output options. + +'GIT_TRACE_SHALLOW':: + Enables trace messages that can help debugging fetching / + cloning of shallow repositories. + See 'GIT_TRACE' for available trace output options. + +'GIT_LITERAL_PATHSPECS':: + Setting this variable to `1` will cause Git to treat all + pathspecs literally, rather than as glob patterns. For example, + running `GIT_LITERAL_PATHSPECS=1 git log -- '*.c'` will search + for commits that touch the path `*.c`, not any paths that the + glob `*.c` matches. You might want this if you are feeding + literal paths to Git (e.g., paths previously given to you by + `git ls-tree`, `--raw` diff output, etc). + +'GIT_GLOB_PATHSPECS':: + Setting this variable to `1` will cause Git to treat all + pathspecs as glob patterns (aka "glob" magic). + +'GIT_NOGLOB_PATHSPECS':: + Setting this variable to `1` will cause Git to treat all + pathspecs as literal (aka "literal" magic). + +'GIT_ICASE_PATHSPECS':: + Setting this variable to `1` will cause Git to treat all + pathspecs as case-insensitive. + +'GIT_REFLOG_ACTION':: + When a ref is updated, reflog entries are created to keep + track of the reason why the ref was updated (which is + typically the name of the high-level command that updated + the ref), in addition to the old and new values of the ref. + A scripted Porcelain command can use set_reflog_action + helper function in `git-sh-setup` to set its name to this + variable when it is invoked as the top level command by the + end user, to be recorded in the body of the reflog. + +'GIT_REF_PARANOIA':: + If set to `1`, include broken or badly named refs when iterating + over lists of refs. In a normal, non-corrupted repository, this + does nothing. However, enabling it may help git to detect and + abort some operations in the presence of broken refs. Git sets + this variable automatically when performing destructive + operations like linkgit:git-prune[1]. You should not need to set + it yourself unless you want to be paranoid about making sure + an operation has touched every ref (e.g., because you are + cloning a repository to make a backup). + +'GIT_ALLOW_PROTOCOL':: + If set, provide a colon-separated list of protocols which are + allowed to be used with fetch/push/clone. This is useful to + restrict recursive submodule initialization from an untrusted + repository. Any protocol not mentioned will be disallowed (i.e., + this is a whitelist, not a blacklist). If the variable is not + set at all, all protocols are enabled. The protocol names + currently used by git are: + + - `file`: any local file-based path (including `file://` URLs, + or local paths) + + - `git`: the anonymous git protocol over a direct TCP + connection (or proxy, if configured) + + - `ssh`: git over ssh (including `host:path` syntax, + `ssh://`, etc). + + - `http`: git over http, both "smart http" and "dumb http". + Note that this does _not_ include `https`; if you want both, + you should specify both as `http:https`. + + - any external helpers are named by their protocol (e.g., use + `hg` to allow the `git-remote-hg` helper) + + +Discussion[[Discussion]] +------------------------ + +More detail on the following is available from the +link:user-manual.html#git-concepts[Git concepts chapter of the +user-manual] and linkgit:gitcore-tutorial[7]. + +A Git project normally consists of a working directory with a ".git" +subdirectory at the top level. The .git directory contains, among other +things, a compressed object database representing the complete history +of the project, an "index" file which links that history to the current +contents of the working tree, and named pointers into that history such +as tags and branch heads. + +The object database contains objects of three main types: blobs, which +hold file data; trees, which point to blobs and other trees to build up +directory hierarchies; and commits, which each reference a single tree +and some number of parent commits. + +The commit, equivalent to what other systems call a "changeset" or +"version", represents a step in the project's history, and each parent +represents an immediately preceding step. Commits with more than one +parent represent merges of independent lines of development. + +All objects are named by the SHA-1 hash of their contents, normally +written as a string of 40 hex digits. Such names are globally unique. +The entire history leading up to a commit can be vouched for by signing +just that commit. A fourth object type, the tag, is provided for this +purpose. + +When first created, objects are stored in individual files, but for +efficiency may later be compressed together into "pack files". + +Named pointers called refs mark interesting points in history. A ref +may contain the SHA-1 name of an object or the name of another ref. Refs +with names beginning `ref/head/` contain the SHA-1 name of the most +recent commit (or "head") of a branch under development. SHA-1 names of +tags of interest are stored under `ref/tags/`. A special ref named +`HEAD` contains the name of the currently checked-out branch. + +The index file is initialized with a list of all paths and, for each +path, a blob object and a set of attributes. The blob object represents +the contents of the file as of the head of the current branch. The +attributes (last modified time, size, etc.) are taken from the +corresponding file in the working tree. Subsequent changes to the +working tree can be found by comparing these attributes. The index may +be updated with new content, and new commits may be created from the +content stored in the index. + +The index is also capable of storing multiple entries (called "stages") +for a given pathname. These stages are used to hold the various +unmerged version of a file when a merge is in progress. + +FURTHER DOCUMENTATION +--------------------- + +See the references in the "description" section to get started +using Git. The following is probably more detail than necessary +for a first-time user. + +The link:user-manual.html#git-concepts[Git concepts chapter of the +user-manual] and linkgit:gitcore-tutorial[7] both provide +introductions to the underlying Git architecture. + +See linkgit:gitworkflows[7] for an overview of recommended workflows. + +See also the link:howto-index.html[howto] documents for some useful +examples. + +The internals are documented in the +link:technical/api-index.html[Git API documentation]. + +Users migrating from CVS may also want to +read linkgit:gitcvs-migration[7]. + + +Authors +------- +Git was started by Linus Torvalds, and is currently maintained by Junio +C Hamano. Numerous contributions have come from the Git mailing list +<git@vger.kernel.org>. http://www.openhub.net/p/git/contributors/summary +gives you a more complete list of contributors. + +If you have a clone of git.git itself, the +output of linkgit:git-shortlog[1] and linkgit:git-blame[1] can show you +the authors for specific parts of the project. + +Reporting Bugs +-------------- + +Report bugs to the Git mailing list <git@vger.kernel.org> where the +development and maintenance is primarily done. You do not have to be +subscribed to the list to send a message there. + +SEE ALSO +-------- +linkgit:gittutorial[7], linkgit:gittutorial-2[7], +linkgit:giteveryday[7], linkgit:gitcvs-migration[7], +linkgit:gitglossary[7], linkgit:gitcore-tutorial[7], +linkgit:gitcli[7], link:user-manual.html[The Git User's Manual], +linkgit:gitworkflows[7] + +GIT +--- +Part of the linkgit:git[1] suite diff --git a/Documentation/gitattributes.txt b/Documentation/gitattributes.txt new file mode 100644 index 0000000..e3b1de8 --- /dev/null +++ b/Documentation/gitattributes.txt @@ -0,0 +1,1005 @@ +gitattributes(5) +================ + +NAME +---- +gitattributes - defining attributes per path + +SYNOPSIS +-------- +$GIT_DIR/info/attributes, .gitattributes + + +DESCRIPTION +----------- + +A `gitattributes` file is a simple text file that gives +`attributes` to pathnames. + +Each line in `gitattributes` file is of form: + + pattern attr1 attr2 ... + +That is, a pattern followed by an attributes list, +separated by whitespaces. When the pattern matches the +path in question, the attributes listed on the line are given to +the path. + +Each attribute can be in one of these states for a given path: + +Set:: + + The path has the attribute with special value "true"; + this is specified by listing only the name of the + attribute in the attribute list. + +Unset:: + + The path has the attribute with special value "false"; + this is specified by listing the name of the attribute + prefixed with a dash `-` in the attribute list. + +Set to a value:: + + The path has the attribute with specified string value; + this is specified by listing the name of the attribute + followed by an equal sign `=` and its value in the + attribute list. + +Unspecified:: + + No pattern matches the path, and nothing says if + the path has or does not have the attribute, the + attribute for the path is said to be Unspecified. + +When more than one pattern matches the path, a later line +overrides an earlier line. This overriding is done per +attribute. The rules how the pattern matches paths are the +same as in `.gitignore` files; see linkgit:gitignore[5]. +Unlike `.gitignore`, negative patterns are forbidden. + +When deciding what attributes are assigned to a path, Git +consults `$GIT_DIR/info/attributes` file (which has the highest +precedence), `.gitattributes` file in the same directory as the +path in question, and its parent directories up to the toplevel of the +work tree (the further the directory that contains `.gitattributes` +is from the path in question, the lower its precedence). Finally +global and system-wide files are considered (they have the lowest +precedence). + +When the `.gitattributes` file is missing from the work tree, the +path in the index is used as a fall-back. During checkout process, +`.gitattributes` in the index is used and then the file in the +working tree is used as a fall-back. + +If you wish to affect only a single repository (i.e., to assign +attributes to files that are particular to +one user's workflow for that repository), then +attributes should be placed in the `$GIT_DIR/info/attributes` file. +Attributes which should be version-controlled and distributed to other +repositories (i.e., attributes of interest to all users) should go into +`.gitattributes` files. Attributes that should affect all repositories +for a single user should be placed in a file specified by the +`core.attributesFile` configuration option (see linkgit:git-config[1]). +Its default value is $XDG_CONFIG_HOME/git/attributes. If $XDG_CONFIG_HOME +is either not set or empty, $HOME/.config/git/attributes is used instead. +Attributes for all users on a system should be placed in the +`$(prefix)/etc/gitattributes` file. + +Sometimes you would need to override an setting of an attribute +for a path to `Unspecified` state. This can be done by listing +the name of the attribute prefixed with an exclamation point `!`. + + +EFFECTS +------- + +Certain operations by Git can be influenced by assigning +particular attributes to a path. Currently, the following +operations are attributes-aware. + +Checking-out and checking-in +~~~~~~~~~~~~~~~~~~~~~~~~~~~~ + +These attributes affect how the contents stored in the +repository are copied to the working tree files when commands +such as 'git checkout' and 'git merge' run. They also affect how +Git stores the contents you prepare in the working tree in the +repository upon 'git add' and 'git commit'. + +`text` +^^^^^^ + +This attribute enables and controls end-of-line normalization. When a +text file is normalized, its line endings are converted to LF in the +repository. To control what line ending style is used in the working +directory, use the `eol` attribute for a single file and the +`core.eol` configuration variable for all text files. + +Set:: + + Setting the `text` attribute on a path enables end-of-line + normalization and marks the path as a text file. End-of-line + conversion takes place without guessing the content type. + +Unset:: + + Unsetting the `text` attribute on a path tells Git not to + attempt any end-of-line conversion upon checkin or checkout. + +Set to string value "auto":: + + When `text` is set to "auto", the path is marked for automatic + end-of-line normalization. If Git decides that the content is + text, its line endings are normalized to LF on checkin. + +Unspecified:: + + If the `text` attribute is unspecified, Git uses the + `core.autocrlf` configuration variable to determine if the + file should be converted. + +Any other value causes Git to act as if `text` has been left +unspecified. + +`eol` +^^^^^ + +This attribute sets a specific line-ending style to be used in the +working directory. It enables end-of-line normalization without any +content checks, effectively setting the `text` attribute. + +Set to string value "crlf":: + + This setting forces Git to normalize line endings for this + file on checkin and convert them to CRLF when the file is + checked out. + +Set to string value "lf":: + + This setting forces Git to normalize line endings to LF on + checkin and prevents conversion to CRLF when the file is + checked out. + +Backwards compatibility with `crlf` attribute +^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ + +For backwards compatibility, the `crlf` attribute is interpreted as +follows: + +------------------------ +crlf text +-crlf -text +crlf=input eol=lf +------------------------ + +End-of-line conversion +^^^^^^^^^^^^^^^^^^^^^^ + +While Git normally leaves file contents alone, it can be configured to +normalize line endings to LF in the repository and, optionally, to +convert them to CRLF when files are checked out. + +Here is an example that will make Git normalize .txt, .vcproj and .sh +files, ensure that .vcproj files have CRLF and .sh files have LF in +the working directory, and prevent .jpg files from being normalized +regardless of their content. + +------------------------ +*.txt text +*.vcproj eol=crlf +*.sh eol=lf +*.jpg -text +------------------------ + +Other source code management systems normalize all text files in their +repositories, and there are two ways to enable similar automatic +normalization in Git. + +If you simply want to have CRLF line endings in your working directory +regardless of the repository you are working with, you can set the +config variable "core.autocrlf" without changing any attributes. + +------------------------ +[core] + autocrlf = true +------------------------ + +This does not force normalization of all text files, but does ensure +that text files that you introduce to the repository have their line +endings normalized to LF when they are added, and that files that are +already normalized in the repository stay normalized. + +If you want to interoperate with a source code management system that +enforces end-of-line normalization, or you simply want all text files +in your repository to be normalized, you should instead set the `text` +attribute to "auto" for _all_ files. + +------------------------ +* text=auto +------------------------ + +This ensures that all files that Git considers to be text will have +normalized (LF) line endings in the repository. The `core.eol` +configuration variable controls which line endings Git will use for +normalized files in your working directory; the default is to use the +native line ending for your platform, or CRLF if `core.autocrlf` is +set. + +NOTE: When `text=auto` normalization is enabled in an existing +repository, any text files containing CRLFs should be normalized. If +they are not they will be normalized the next time someone tries to +change them, causing unfortunate misattribution. From a clean working +directory: + +------------------------------------------------- +$ echo "* text=auto" >>.gitattributes +$ rm .git/index # Remove the index to force Git to +$ git reset # re-scan the working directory +$ git status # Show files that will be normalized +$ git add -u +$ git add .gitattributes +$ git commit -m "Introduce end-of-line normalization" +------------------------------------------------- + +If any files that should not be normalized show up in 'git status', +unset their `text` attribute before running 'git add -u'. + +------------------------ +manual.pdf -text +------------------------ + +Conversely, text files that Git does not detect can have normalization +enabled manually. + +------------------------ +weirdchars.txt text +------------------------ + +If `core.safecrlf` is set to "true" or "warn", Git verifies if +the conversion is reversible for the current setting of +`core.autocrlf`. For "true", Git rejects irreversible +conversions; for "warn", Git only prints a warning but accepts +an irreversible conversion. The safety triggers to prevent such +a conversion done to the files in the work tree, but there are a +few exceptions. Even though... + +- 'git add' itself does not touch the files in the work tree, the + next checkout would, so the safety triggers; + +- 'git apply' to update a text file with a patch does touch the files + in the work tree, but the operation is about text files and CRLF + conversion is about fixing the line ending inconsistencies, so the + safety does not trigger; + +- 'git diff' itself does not touch the files in the work tree, it is + often run to inspect the changes you intend to next 'git add'. To + catch potential problems early, safety triggers. + + +`ident` +^^^^^^^ + +When the attribute `ident` is set for a path, Git replaces +`$Id$` in the blob object with `$Id:`, followed by the +40-character hexadecimal blob object name, followed by a dollar +sign `$` upon checkout. Any byte sequence that begins with +`$Id:` and ends with `$` in the worktree file is replaced +with `$Id$` upon check-in. + + +`filter` +^^^^^^^^ + +A `filter` attribute can be set to a string value that names a +filter driver specified in the configuration. + +A filter driver consists of a `clean` command and a `smudge` +command, either of which can be left unspecified. Upon +checkout, when the `smudge` command is specified, the command is +fed the blob object from its standard input, and its standard +output is used to update the worktree file. Similarly, the +`clean` command is used to convert the contents of worktree file +upon checkin. + +One use of the content filtering is to massage the content into a shape +that is more convenient for the platform, filesystem, and the user to use. +For this mode of operation, the key phrase here is "more convenient" and +not "turning something unusable into usable". In other words, the intent +is that if someone unsets the filter driver definition, or does not have +the appropriate filter program, the project should still be usable. + +Another use of the content filtering is to store the content that cannot +be directly used in the repository (e.g. a UUID that refers to the true +content stored outside Git, or an encrypted content) and turn it into a +usable form upon checkout (e.g. download the external content, or decrypt +the encrypted content). + +These two filters behave differently, and by default, a filter is taken as +the former, massaging the contents into more convenient shape. A missing +filter driver definition in the config, or a filter driver that exits with +a non-zero status, is not an error but makes the filter a no-op passthru. + +You can declare that a filter turns a content that by itself is unusable +into a usable content by setting the filter.<driver>.required configuration +variable to `true`. + +For example, in .gitattributes, you would assign the `filter` +attribute for paths. + +------------------------ +*.c filter=indent +------------------------ + +Then you would define a "filter.indent.clean" and "filter.indent.smudge" +configuration in your .git/config to specify a pair of commands to +modify the contents of C programs when the source files are checked +in ("clean" is run) and checked out (no change is made because the +command is "cat"). + +------------------------ +[filter "indent"] + clean = indent + smudge = cat +------------------------ + +For best results, `clean` should not alter its output further if it is +run twice ("clean->clean" should be equivalent to "clean"), and +multiple `smudge` commands should not alter `clean`'s output +("smudge->smudge->clean" should be equivalent to "clean"). See the +section on merging below. + +The "indent" filter is well-behaved in this regard: it will not modify +input that is already correctly indented. In this case, the lack of a +smudge filter means that the clean filter _must_ accept its own output +without modifying it. + +If a filter _must_ succeed in order to make the stored contents usable, +you can declare that the filter is `required`, in the configuration: + +------------------------ +[filter "crypt"] + clean = openssl enc ... + smudge = openssl enc -d ... + required +------------------------ + +Sequence "%f" on the filter command line is replaced with the name of +the file the filter is working on. A filter might use this in keyword +substitution. For example: + +------------------------ +[filter "p4"] + clean = git-p4-filter --clean %f + smudge = git-p4-filter --smudge %f +------------------------ + + +Interaction between checkin/checkout attributes +^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ + +In the check-in codepath, the worktree file is first converted +with `filter` driver (if specified and corresponding driver +defined), then the result is processed with `ident` (if +specified), and then finally with `text` (again, if specified +and applicable). + +In the check-out codepath, the blob content is first converted +with `text`, and then `ident` and fed to `filter`. + + +Merging branches with differing checkin/checkout attributes +^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ + +If you have added attributes to a file that cause the canonical +repository format for that file to change, such as adding a +clean/smudge filter or text/eol/ident attributes, merging anything +where the attribute is not in place would normally cause merge +conflicts. + +To prevent these unnecessary merge conflicts, Git can be told to run a +virtual check-out and check-in of all three stages of a file when +resolving a three-way merge by setting the `merge.renormalize` +configuration variable. This prevents changes caused by check-in +conversion from causing spurious merge conflicts when a converted file +is merged with an unconverted file. + +As long as a "smudge->clean" results in the same output as a "clean" +even on files that are already smudged, this strategy will +automatically resolve all filter-related conflicts. Filters that do +not act in this way may cause additional merge conflicts that must be +resolved manually. + + +Generating diff text +~~~~~~~~~~~~~~~~~~~~ + +`diff` +^^^^^^ + +The attribute `diff` affects how Git generates diffs for particular +files. It can tell Git whether to generate a textual patch for the path +or to treat the path as a binary file. It can also affect what line is +shown on the hunk header `@@ -k,l +n,m @@` line, tell Git to use an +external command to generate the diff, or ask Git to convert binary +files to a text format before generating the diff. + +Set:: + + A path to which the `diff` attribute is set is treated + as text, even when they contain byte values that + normally never appear in text files, such as NUL. + +Unset:: + + A path to which the `diff` attribute is unset will + generate `Binary files differ` (or a binary patch, if + binary patches are enabled). + +Unspecified:: + + A path to which the `diff` attribute is unspecified + first gets its contents inspected, and if it looks like + text and is smaller than core.bigFileThreshold, it is treated + as text. Otherwise it would generate `Binary files differ`. + +String:: + + Diff is shown using the specified diff driver. Each driver may + specify one or more options, as described in the following + section. The options for the diff driver "foo" are defined + by the configuration variables in the "diff.foo" section of the + Git config file. + + +Defining an external diff driver +^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ + +The definition of a diff driver is done in `gitconfig`, not +`gitattributes` file, so strictly speaking this manual page is a +wrong place to talk about it. However... + +To define an external diff driver `jcdiff`, add a section to your +`$GIT_DIR/config` file (or `$HOME/.gitconfig` file) like this: + +---------------------------------------------------------------- +[diff "jcdiff"] + command = j-c-diff +---------------------------------------------------------------- + +When Git needs to show you a diff for the path with `diff` +attribute set to `jcdiff`, it calls the command you specified +with the above configuration, i.e. `j-c-diff`, with 7 +parameters, just like `GIT_EXTERNAL_DIFF` program is called. +See linkgit:git[1] for details. + + +Defining a custom hunk-header +^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ + +Each group of changes (called a "hunk") in the textual diff output +is prefixed with a line of the form: + + @@ -k,l +n,m @@ TEXT + +This is called a 'hunk header'. The "TEXT" portion is by default a line +that begins with an alphabet, an underscore or a dollar sign; this +matches what GNU 'diff -p' output uses. This default selection however +is not suited for some contents, and you can use a customized pattern +to make a selection. + +First, in .gitattributes, you would assign the `diff` attribute +for paths. + +------------------------ +*.tex diff=tex +------------------------ + +Then, you would define a "diff.tex.xfuncname" configuration to +specify a regular expression that matches a line that you would +want to appear as the hunk header "TEXT". Add a section to your +`$GIT_DIR/config` file (or `$HOME/.gitconfig` file) like this: + +------------------------ +[diff "tex"] + xfuncname = "^(\\\\(sub)*section\\{.*)$" +------------------------ + +Note. A single level of backslashes are eaten by the +configuration file parser, so you would need to double the +backslashes; the pattern above picks a line that begins with a +backslash, and zero or more occurrences of `sub` followed by +`section` followed by open brace, to the end of line. + +There are a few built-in patterns to make this easier, and `tex` +is one of them, so you do not have to write the above in your +configuration file (you still need to enable this with the +attribute mechanism, via `.gitattributes`). The following built in +patterns are available: + +- `ada` suitable for source code in the Ada language. + +- `bibtex` suitable for files with BibTeX coded references. + +- `cpp` suitable for source code in the C and C++ languages. + +- `csharp` suitable for source code in the C# language. + +- `fortran` suitable for source code in the Fortran language. + +- `fountain` suitable for Fountain documents. + +- `html` suitable for HTML/XHTML documents. + +- `java` suitable for source code in the Java language. + +- `matlab` suitable for source code in the MATLAB language. + +- `objc` suitable for source code in the Objective-C language. + +- `pascal` suitable for source code in the Pascal/Delphi language. + +- `perl` suitable for source code in the Perl language. + +- `php` suitable for source code in the PHP language. + +- `python` suitable for source code in the Python language. + +- `ruby` suitable for source code in the Ruby language. + +- `tex` suitable for source code for LaTeX documents. + + +Customizing word diff +^^^^^^^^^^^^^^^^^^^^^ + +You can customize the rules that `git diff --word-diff` uses to +split words in a line, by specifying an appropriate regular expression +in the "diff.*.wordRegex" configuration variable. For example, in TeX +a backslash followed by a sequence of letters forms a command, but +several such commands can be run together without intervening +whitespace. To separate them, use a regular expression in your +`$GIT_DIR/config` file (or `$HOME/.gitconfig` file) like this: + +------------------------ +[diff "tex"] + wordRegex = "\\\\[a-zA-Z]+|[{}]|\\\\.|[^\\{}[:space:]]+" +------------------------ + +A built-in pattern is provided for all languages listed in the +previous section. + + +Performing text diffs of binary files +^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ + +Sometimes it is desirable to see the diff of a text-converted +version of some binary files. For example, a word processor +document can be converted to an ASCII text representation, and +the diff of the text shown. Even though this conversion loses +some information, the resulting diff is useful for human +viewing (but cannot be applied directly). + +The `textconv` config option is used to define a program for +performing such a conversion. The program should take a single +argument, the name of a file to convert, and produce the +resulting text on stdout. + +For example, to show the diff of the exif information of a +file instead of the binary information (assuming you have the +exif tool installed), add the following section to your +`$GIT_DIR/config` file (or `$HOME/.gitconfig` file): + +------------------------ +[diff "jpg"] + textconv = exif +------------------------ + +NOTE: The text conversion is generally a one-way conversion; +in this example, we lose the actual image contents and focus +just on the text data. This means that diffs generated by +textconv are _not_ suitable for applying. For this reason, +only `git diff` and the `git log` family of commands (i.e., +log, whatchanged, show) will perform text conversion. `git +format-patch` will never generate this output. If you want to +send somebody a text-converted diff of a binary file (e.g., +because it quickly conveys the changes you have made), you +should generate it separately and send it as a comment _in +addition to_ the usual binary diff that you might send. + +Because text conversion can be slow, especially when doing a +large number of them with `git log -p`, Git provides a mechanism +to cache the output and use it in future diffs. To enable +caching, set the "cachetextconv" variable in your diff driver's +config. For example: + +------------------------ +[diff "jpg"] + textconv = exif + cachetextconv = true +------------------------ + +This will cache the result of running "exif" on each blob +indefinitely. If you change the textconv config variable for a +diff driver, Git will automatically invalidate the cache entries +and re-run the textconv filter. If you want to invalidate the +cache manually (e.g., because your version of "exif" was updated +and now produces better output), you can remove the cache +manually with `git update-ref -d refs/notes/textconv/jpg` (where +"jpg" is the name of the diff driver, as in the example above). + +Choosing textconv versus external diff +^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ + +If you want to show differences between binary or specially-formatted +blobs in your repository, you can choose to use either an external diff +command, or to use textconv to convert them to a diff-able text format. +Which method you choose depends on your exact situation. + +The advantage of using an external diff command is flexibility. You are +not bound to find line-oriented changes, nor is it necessary for the +output to resemble unified diff. You are free to locate and report +changes in the most appropriate way for your data format. + +A textconv, by comparison, is much more limiting. You provide a +transformation of the data into a line-oriented text format, and Git +uses its regular diff tools to generate the output. There are several +advantages to choosing this method: + +1. Ease of use. It is often much simpler to write a binary to text + transformation than it is to perform your own diff. In many cases, + existing programs can be used as textconv filters (e.g., exif, + odt2txt). + +2. Git diff features. By performing only the transformation step + yourself, you can still utilize many of Git's diff features, + including colorization, word-diff, and combined diffs for merges. + +3. Caching. Textconv caching can speed up repeated diffs, such as those + you might trigger by running `git log -p`. + + +Marking files as binary +^^^^^^^^^^^^^^^^^^^^^^^ + +Git usually guesses correctly whether a blob contains text or binary +data by examining the beginning of the contents. However, sometimes you +may want to override its decision, either because a blob contains binary +data later in the file, or because the content, while technically +composed of text characters, is opaque to a human reader. For example, +many postscript files contain only ASCII characters, but produce noisy +and meaningless diffs. + +The simplest way to mark a file as binary is to unset the diff +attribute in the `.gitattributes` file: + +------------------------ +*.ps -diff +------------------------ + +This will cause Git to generate `Binary files differ` (or a binary +patch, if binary patches are enabled) instead of a regular diff. + +However, one may also want to specify other diff driver attributes. For +example, you might want to use `textconv` to convert postscript files to +an ASCII representation for human viewing, but otherwise treat them as +binary files. You cannot specify both `-diff` and `diff=ps` attributes. +The solution is to use the `diff.*.binary` config option: + +------------------------ +[diff "ps"] + textconv = ps2ascii + binary = true +------------------------ + +Performing a three-way merge +~~~~~~~~~~~~~~~~~~~~~~~~~~~~ + +`merge` +^^^^^^^ + +The attribute `merge` affects how three versions of a file are +merged when a file-level merge is necessary during `git merge`, +and other commands such as `git revert` and `git cherry-pick`. + +Set:: + + Built-in 3-way merge driver is used to merge the + contents in a way similar to 'merge' command of `RCS` + suite. This is suitable for ordinary text files. + +Unset:: + + Take the version from the current branch as the + tentative merge result, and declare that the merge has + conflicts. This is suitable for binary files that do + not have a well-defined merge semantics. + +Unspecified:: + + By default, this uses the same built-in 3-way merge + driver as is the case when the `merge` attribute is set. + However, the `merge.default` configuration variable can name + different merge driver to be used with paths for which the + `merge` attribute is unspecified. + +String:: + + 3-way merge is performed using the specified custom + merge driver. The built-in 3-way merge driver can be + explicitly specified by asking for "text" driver; the + built-in "take the current branch" driver can be + requested with "binary". + + +Built-in merge drivers +^^^^^^^^^^^^^^^^^^^^^^ + +There are a few built-in low-level merge drivers defined that +can be asked for via the `merge` attribute. + +text:: + + Usual 3-way file level merge for text files. Conflicted + regions are marked with conflict markers `<<<<<<<`, + `=======` and `>>>>>>>`. The version from your branch + appears before the `=======` marker, and the version + from the merged branch appears after the `=======` + marker. + +binary:: + + Keep the version from your branch in the work tree, but + leave the path in the conflicted state for the user to + sort out. + +union:: + + Run 3-way file level merge for text files, but take + lines from both versions, instead of leaving conflict + markers. This tends to leave the added lines in the + resulting file in random order and the user should + verify the result. Do not use this if you do not + understand the implications. + + +Defining a custom merge driver +^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ + +The definition of a merge driver is done in the `.git/config` +file, not in the `gitattributes` file, so strictly speaking this +manual page is a wrong place to talk about it. However... + +To define a custom merge driver `filfre`, add a section to your +`$GIT_DIR/config` file (or `$HOME/.gitconfig` file) like this: + +---------------------------------------------------------------- +[merge "filfre"] + name = feel-free merge driver + driver = filfre %O %A %B %L %P + recursive = binary +---------------------------------------------------------------- + +The `merge.*.name` variable gives the driver a human-readable +name. + +The `merge.*.driver` variable's value is used to construct a +command to run to merge ancestor's version (`%O`), current +version (`%A`) and the other branches' version (`%B`). These +three tokens are replaced with the names of temporary files that +hold the contents of these versions when the command line is +built. Additionally, %L will be replaced with the conflict marker +size (see below). + +The merge driver is expected to leave the result of the merge in +the file named with `%A` by overwriting it, and exit with zero +status if it managed to merge them cleanly, or non-zero if there +were conflicts. + +The `merge.*.recursive` variable specifies what other merge +driver to use when the merge driver is called for an internal +merge between common ancestors, when there are more than one. +When left unspecified, the driver itself is used for both +internal merge and the final merge. + +The merge driver can learn the pathname in which the merged result +will be stored via placeholder `%P`. + + +`conflict-marker-size` +^^^^^^^^^^^^^^^^^^^^^^ + +This attribute controls the length of conflict markers left in +the work tree file during a conflicted merge. Only setting to +the value to a positive integer has any meaningful effect. + +For example, this line in `.gitattributes` can be used to tell the merge +machinery to leave much longer (instead of the usual 7-character-long) +conflict markers when merging the file `Documentation/git-merge.txt` +results in a conflict. + +------------------------ +Documentation/git-merge.txt conflict-marker-size=32 +------------------------ + + +Checking whitespace errors +~~~~~~~~~~~~~~~~~~~~~~~~~~ + +`whitespace` +^^^^^^^^^^^^ + +The `core.whitespace` configuration variable allows you to define what +'diff' and 'apply' should consider whitespace errors for all paths in +the project (See linkgit:git-config[1]). This attribute gives you finer +control per path. + +Set:: + + Notice all types of potential whitespace errors known to Git. + The tab width is taken from the value of the `core.whitespace` + configuration variable. + +Unset:: + + Do not notice anything as error. + +Unspecified:: + + Use the value of the `core.whitespace` configuration variable to + decide what to notice as error. + +String:: + + Specify a comma separate list of common whitespace problems to + notice in the same format as the `core.whitespace` configuration + variable. + + +Creating an archive +~~~~~~~~~~~~~~~~~~~ + +`export-ignore` +^^^^^^^^^^^^^^^ + +Files and directories with the attribute `export-ignore` won't be added to +archive files. + +`export-subst` +^^^^^^^^^^^^^^ + +If the attribute `export-subst` is set for a file then Git will expand +several placeholders when adding this file to an archive. The +expansion depends on the availability of a commit ID, i.e., if +linkgit:git-archive[1] has been given a tree instead of a commit or a +tag then no replacement will be done. The placeholders are the same +as those for the option `--pretty=format:` of linkgit:git-log[1], +except that they need to be wrapped like this: `$Format:PLACEHOLDERS$` +in the file. E.g. the string `$Format:%H$` will be replaced by the +commit hash. + + +Packing objects +~~~~~~~~~~~~~~~ + +`delta` +^^^^^^^ + +Delta compression will not be attempted for blobs for paths with the +attribute `delta` set to false. + + +Viewing files in GUI tools +~~~~~~~~~~~~~~~~~~~~~~~~~~ + +`encoding` +^^^^^^^^^^ + +The value of this attribute specifies the character encoding that should +be used by GUI tools (e.g. linkgit:gitk[1] and linkgit:git-gui[1]) to +display the contents of the relevant file. Note that due to performance +considerations linkgit:gitk[1] does not use this attribute unless you +manually enable per-file encodings in its options. + +If this attribute is not set or has an invalid value, the value of the +`gui.encoding` configuration variable is used instead +(See linkgit:git-config[1]). + + +USING MACRO ATTRIBUTES +---------------------- + +You do not want any end-of-line conversions applied to, nor textual diffs +produced for, any binary file you track. You would need to specify e.g. + +------------ +*.jpg -text -diff +------------ + +but that may become cumbersome, when you have many attributes. Using +macro attributes, you can define an attribute that, when set, also +sets or unsets a number of other attributes at the same time. The +system knows a built-in macro attribute, `binary`: + +------------ +*.jpg binary +------------ + +Setting the "binary" attribute also unsets the "text" and "diff" +attributes as above. Note that macro attributes can only be "Set", +though setting one might have the effect of setting or unsetting other +attributes or even returning other attributes to the "Unspecified" +state. + + +DEFINING MACRO ATTRIBUTES +------------------------- + +Custom macro attributes can be defined only in top-level gitattributes +files (`$GIT_DIR/info/attributes`, the `.gitattributes` file at the +top level of the working tree, or the global or system-wide +gitattributes files), not in `.gitattributes` files in working tree +subdirectories. The built-in macro attribute "binary" is equivalent +to: + +------------ +[attr]binary -diff -merge -text +------------ + + +EXAMPLE +------- + +If you have these three `gitattributes` file: + +---------------------------------------------------------------- +(in $GIT_DIR/info/attributes) + +a* foo !bar -baz + +(in .gitattributes) +abc foo bar baz + +(in t/.gitattributes) +ab* merge=filfre +abc -foo -bar +*.c frotz +---------------------------------------------------------------- + +the attributes given to path `t/abc` are computed as follows: + +1. By examining `t/.gitattributes` (which is in the same + directory as the path in question), Git finds that the first + line matches. `merge` attribute is set. It also finds that + the second line matches, and attributes `foo` and `bar` + are unset. + +2. Then it examines `.gitattributes` (which is in the parent + directory), and finds that the first line matches, but + `t/.gitattributes` file already decided how `merge`, `foo` + and `bar` attributes should be given to this path, so it + leaves `foo` and `bar` unset. Attribute `baz` is set. + +3. Finally it examines `$GIT_DIR/info/attributes`. This file + is used to override the in-tree settings. The first line is + a match, and `foo` is set, `bar` is reverted to unspecified + state, and `baz` is unset. + +As the result, the attributes assignment to `t/abc` becomes: + +---------------------------------------------------------------- +foo set to true +bar unspecified +baz set to false +merge set to string value "filfre" +frotz unspecified +---------------------------------------------------------------- + + +SEE ALSO +-------- +linkgit:git-check-attr[1]. + +GIT +--- +Part of the linkgit:git[1] suite diff --git a/Documentation/gitcli.txt b/Documentation/gitcli.txt new file mode 100644 index 0000000..dfe7d83 --- /dev/null +++ b/Documentation/gitcli.txt @@ -0,0 +1,214 @@ +gitcli(7) +========= + +NAME +---- +gitcli - Git command-line interface and conventions + +SYNOPSIS +-------- +gitcli + + +DESCRIPTION +----------- + +This manual describes the convention used throughout Git CLI. + +Many commands take revisions (most often "commits", but sometimes +"tree-ish", depending on the context and command) and paths as their +arguments. Here are the rules: + + * Revisions come first and then paths. + E.g. in `git diff v1.0 v2.0 arch/x86 include/asm-x86`, + `v1.0` and `v2.0` are revisions and `arch/x86` and `include/asm-x86` + are paths. + + * When an argument can be misunderstood as either a revision or a path, + they can be disambiguated by placing `--` between them. + E.g. `git diff -- HEAD` is, "I have a file called HEAD in my work + tree. Please show changes between the version I staged in the index + and what I have in the work tree for that file", not "show difference + between the HEAD commit and the work tree as a whole". You can say + `git diff HEAD --` to ask for the latter. + + * Without disambiguating `--`, Git makes a reasonable guess, but errors + out and asking you to disambiguate when ambiguous. E.g. if you have a + file called HEAD in your work tree, `git diff HEAD` is ambiguous, and + you have to say either `git diff HEAD --` or `git diff -- HEAD` to + disambiguate. ++ +When writing a script that is expected to handle random user-input, it is +a good practice to make it explicit which arguments are which by placing +disambiguating `--` at appropriate places. + + * Many commands allow wildcards in paths, but you need to protect + them from getting globbed by the shell. These two mean different + things: ++ +-------------------------------- +$ git checkout -- *.c +$ git checkout -- \*.c +-------------------------------- ++ +The former lets your shell expand the fileglob, and you are asking +the dot-C files in your working tree to be overwritten with the version +in the index. The latter passes the `*.c` to Git, and you are asking +the paths in the index that match the pattern to be checked out to your +working tree. After running `git add hello.c; rm hello.c`, you will _not_ +see `hello.c` in your working tree with the former, but with the latter +you will. + + * Just as the filesystem '.' (period) refers to the current directory, + using a '.' as a repository name in Git (a dot-repository) is a relative + path and means your current repository. + +Here are the rules regarding the "flags" that you should follow when you are +scripting Git: + + * it's preferred to use the non-dashed form of Git commands, which means that + you should prefer `git foo` to `git-foo`. + + * splitting short options to separate words (prefer `git foo -a -b` + to `git foo -ab`, the latter may not even work). + + * when a command-line option takes an argument, use the 'stuck' form. In + other words, write `git foo -oArg` instead of `git foo -o Arg` for short + options, and `git foo --long-opt=Arg` instead of `git foo --long-opt Arg` + for long options. An option that takes optional option-argument must be + written in the 'stuck' form. + + * when you give a revision parameter to a command, make sure the parameter is + not ambiguous with a name of a file in the work tree. E.g. do not write + `git log -1 HEAD` but write `git log -1 HEAD --`; the former will not work + if you happen to have a file called `HEAD` in the work tree. + + * many commands allow a long option `--option` to be abbreviated + only to their unique prefix (e.g. if there is no other option + whose name begins with `opt`, you may be able to spell `--opt` to + invoke the `--option` flag), but you should fully spell them out + when writing your scripts; later versions of Git may introduce a + new option whose name shares the same prefix, e.g. `--optimize`, + to make a short prefix that used to be unique no longer unique. + + +ENHANCED OPTION PARSER +---------------------- +From the Git 1.5.4 series and further, many Git commands (not all of them at the +time of the writing though) come with an enhanced option parser. + +Here is a list of the facilities provided by this option parser. + + +Magic Options +~~~~~~~~~~~~~ +Commands which have the enhanced option parser activated all understand a +couple of magic command-line options: + +-h:: + gives a pretty printed usage of the command. ++ +--------------------------------------------- +$ git describe -h +usage: git describe [options] <commit-ish>* + or: git describe [options] --dirty + + --contains find the tag that comes after the commit + --debug debug search strategy on stderr + --all use any ref + --tags use any tag, even unannotated + --long always use long format + --abbrev[=<n>] use <n> digits to display SHA-1s +--------------------------------------------- + +--help-all:: + Some Git commands take options that are only used for plumbing or that + are deprecated, and such options are hidden from the default usage. This + option gives the full list of options. + + +Negating options +~~~~~~~~~~~~~~~~ +Options with long option names can be negated by prefixing `--no-`. For +example, `git branch` has the option `--track` which is 'on' by default. You +can use `--no-track` to override that behaviour. The same goes for `--color` +and `--no-color`. + + +Aggregating short options +~~~~~~~~~~~~~~~~~~~~~~~~~ +Commands that support the enhanced option parser allow you to aggregate short +options. This means that you can for example use `git rm -rf` or +`git clean -fdx`. + + +Abbreviating long options +~~~~~~~~~~~~~~~~~~~~~~~~~ +Commands that support the enhanced option parser accepts unique +prefix of a long option as if it is fully spelled out, but use this +with a caution. For example, `git commit --amen` behaves as if you +typed `git commit --amend`, but that is true only until a later version +of Git introduces another option that shares the same prefix, +e.g. `git commit --amenity` option. + + +Separating argument from the option +~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ +You can write the mandatory option parameter to an option as a separate +word on the command line. That means that all the following uses work: + +---------------------------- +$ git foo --long-opt=Arg +$ git foo --long-opt Arg +$ git foo -oArg +$ git foo -o Arg +---------------------------- + +However, this is *NOT* allowed for switches with an optional value, where the +'stuck' form must be used: +---------------------------- +$ git describe --abbrev HEAD # correct +$ git describe --abbrev=10 HEAD # correct +$ git describe --abbrev 10 HEAD # NOT WHAT YOU MEANT +---------------------------- + + +NOTES ON FREQUENTLY CONFUSED OPTIONS +------------------------------------ + +Many commands that can work on files in the working tree +and/or in the index can take `--cached` and/or `--index` +options. Sometimes people incorrectly think that, because +the index was originally called cache, these two are +synonyms. They are *not* -- these two options mean very +different things. + + * The `--cached` option is used to ask a command that + usually works on files in the working tree to *only* work + with the index. For example, `git grep`, when used + without a commit to specify from which commit to look for + strings in, usually works on files in the working tree, + but with the `--cached` option, it looks for strings in + the index. + + * The `--index` option is used to ask a command that + usually works on files in the working tree to *also* + affect the index. For example, `git stash apply` usually + merges changes recorded in a stash to the working tree, + but with the `--index` option, it also merges changes to + the index as well. + +`git apply` command can be used with `--cached` and +`--index` (but not at the same time). Usually the command +only affects the files in the working tree, but with +`--index`, it patches both the files and their index +entries, and with `--cached`, it modifies only the index +entries. + +See also http://marc.info/?l=git&m=116563135620359 and +http://marc.info/?l=git&m=119150393620273 for further +information. + +GIT +--- +Part of the linkgit:git[1] suite diff --git a/Documentation/gitcore-tutorial.txt b/Documentation/gitcore-tutorial.txt new file mode 100644 index 0000000..15b3bfa --- /dev/null +++ b/Documentation/gitcore-tutorial.txt @@ -0,0 +1,1661 @@ +gitcore-tutorial(7) +=================== + +NAME +---- +gitcore-tutorial - A Git core tutorial for developers + +SYNOPSIS +-------- +git * + +DESCRIPTION +----------- + +This tutorial explains how to use the "core" Git commands to set up and +work with a Git repository. + +If you just need to use Git as a revision control system you may prefer +to start with "A Tutorial Introduction to Git" (linkgit:gittutorial[7]) or +link:user-manual.html[the Git User Manual]. + +However, an understanding of these low-level tools can be helpful if +you want to understand Git's internals. + +The core Git is often called "plumbing", with the prettier user +interfaces on top of it called "porcelain". You may not want to use the +plumbing directly very often, but it can be good to know what the +plumbing does for when the porcelain isn't flushing. + +Back when this document was originally written, many porcelain +commands were shell scripts. For simplicity, it still uses them as +examples to illustrate how plumbing is fit together to form the +porcelain commands. The source tree includes some of these scripts in +contrib/examples/ for reference. Although these are not implemented as +shell scripts anymore, the description of what the plumbing layer +commands do is still valid. + +[NOTE] +Deeper technical details are often marked as Notes, which you can +skip on your first reading. + + +Creating a Git repository +------------------------- + +Creating a new Git repository couldn't be easier: all Git repositories start +out empty, and the only thing you need to do is find yourself a +subdirectory that you want to use as a working tree - either an empty +one for a totally new project, or an existing working tree that you want +to import into Git. + +For our first example, we're going to start a totally new repository from +scratch, with no pre-existing files, and we'll call it 'git-tutorial'. +To start up, create a subdirectory for it, change into that +subdirectory, and initialize the Git infrastructure with 'git init': + +------------------------------------------------ +$ mkdir git-tutorial +$ cd git-tutorial +$ git init +------------------------------------------------ + +to which Git will reply + +---------------- +Initialized empty Git repository in .git/ +---------------- + +which is just Git's way of saying that you haven't been doing anything +strange, and that it will have created a local `.git` directory setup for +your new project. You will now have a `.git` directory, and you can +inspect that with 'ls'. For your new empty project, it should show you +three entries, among other things: + + - a file called `HEAD`, that has `ref: refs/heads/master` in it. + This is similar to a symbolic link and points at + `refs/heads/master` relative to the `HEAD` file. ++ +Don't worry about the fact that the file that the `HEAD` link points to +doesn't even exist yet -- you haven't created the commit that will +start your `HEAD` development branch yet. + + - a subdirectory called `objects`, which will contain all the + objects of your project. You should never have any real reason to + look at the objects directly, but you might want to know that these + objects are what contains all the real 'data' in your repository. + + - a subdirectory called `refs`, which contains references to objects. + +In particular, the `refs` subdirectory will contain two other +subdirectories, named `heads` and `tags` respectively. They do +exactly what their names imply: they contain references to any number +of different 'heads' of development (aka 'branches'), and to any +'tags' that you have created to name specific versions in your +repository. + +One note: the special `master` head is the default branch, which is +why the `.git/HEAD` file was created points to it even if it +doesn't yet exist. Basically, the `HEAD` link is supposed to always +point to the branch you are working on right now, and you always +start out expecting to work on the `master` branch. + +However, this is only a convention, and you can name your branches +anything you want, and don't have to ever even 'have' a `master` +branch. A number of the Git tools will assume that `.git/HEAD` is +valid, though. + +[NOTE] +An 'object' is identified by its 160-bit SHA-1 hash, aka 'object name', +and a reference to an object is always the 40-byte hex +representation of that SHA-1 name. The files in the `refs` +subdirectory are expected to contain these hex references +(usually with a final `\n` at the end), and you should thus +expect to see a number of 41-byte files containing these +references in these `refs` subdirectories when you actually start +populating your tree. + +[NOTE] +An advanced user may want to take a look at linkgit:gitrepository-layout[5] +after finishing this tutorial. + +You have now created your first Git repository. Of course, since it's +empty, that's not very useful, so let's start populating it with data. + + +Populating a Git repository +--------------------------- + +We'll keep this simple and stupid, so we'll start off with populating a +few trivial files just to get a feel for it. + +Start off with just creating any random files that you want to maintain +in your Git repository. We'll start off with a few bad examples, just to +get a feel for how this works: + +------------------------------------------------ +$ echo "Hello World" >hello +$ echo "Silly example" >example +------------------------------------------------ + +you have now created two files in your working tree (aka 'working directory'), +but to actually check in your hard work, you will have to go through two steps: + + - fill in the 'index' file (aka 'cache') with the information about your + working tree state. + + - commit that index file as an object. + +The first step is trivial: when you want to tell Git about any changes +to your working tree, you use the 'git update-index' program. That +program normally just takes a list of filenames you want to update, but +to avoid trivial mistakes, it refuses to add new entries to the index +(or remove existing ones) unless you explicitly tell it that you're +adding a new entry with the `--add` flag (or removing an entry with the +`--remove`) flag. + +So to populate the index with the two files you just created, you can do + +------------------------------------------------ +$ git update-index --add hello example +------------------------------------------------ + +and you have now told Git to track those two files. + +In fact, as you did that, if you now look into your object directory, +you'll notice that Git will have added two new objects to the object +database. If you did exactly the steps above, you should now be able to do + + +---------------- +$ ls .git/objects/??/* +---------------- + +and see two files: + +---------------- +.git/objects/55/7db03de997c86a4a028e1ebd3a1ceb225be238 +.git/objects/f2/4c74a2e500f5ee1332c86b94199f52b1d1d962 +---------------- + +which correspond with the objects with names of `557db...` and +`f24c7...` respectively. + +If you want to, you can use 'git cat-file' to look at those objects, but +you'll have to use the object name, not the filename of the object: + +---------------- +$ git cat-file -t 557db03de997c86a4a028e1ebd3a1ceb225be238 +---------------- + +where the `-t` tells 'git cat-file' to tell you what the "type" of the +object is. Git will tell you that you have a "blob" object (i.e., just a +regular file), and you can see the contents with + +---------------- +$ git cat-file blob 557db03 +---------------- + +which will print out "Hello World". The object `557db03` is nothing +more than the contents of your file `hello`. + +[NOTE] +Don't confuse that object with the file `hello` itself. The +object is literally just those specific *contents* of the file, and +however much you later change the contents in file `hello`, the object +we just looked at will never change. Objects are immutable. + +[NOTE] +The second example demonstrates that you can +abbreviate the object name to only the first several +hexadecimal digits in most places. + +Anyway, as we mentioned previously, you normally never actually take a +look at the objects themselves, and typing long 40-character hex +names is not something you'd normally want to do. The above digression +was just to show that 'git update-index' did something magical, and +actually saved away the contents of your files into the Git object +database. + +Updating the index did something else too: it created a `.git/index` +file. This is the index that describes your current working tree, and +something you should be very aware of. Again, you normally never worry +about the index file itself, but you should be aware of the fact that +you have not actually really "checked in" your files into Git so far, +you've only *told* Git about them. + +However, since Git knows about them, you can now start using some of the +most basic Git commands to manipulate the files or look at their status. + +In particular, let's not even check in the two files into Git yet, we'll +start off by adding another line to `hello` first: + +------------------------------------------------ +$ echo "It's a new day for git" >>hello +------------------------------------------------ + +and you can now, since you told Git about the previous state of `hello`, ask +Git what has changed in the tree compared to your old index, using the +'git diff-files' command: + +------------ +$ git diff-files +------------ + +Oops. That wasn't very readable. It just spit out its own internal +version of a 'diff', but that internal version really just tells you +that it has noticed that "hello" has been modified, and that the old object +contents it had have been replaced with something else. + +To make it readable, we can tell 'git diff-files' to output the +differences as a patch, using the `-p` flag: + +------------ +$ git diff-files -p +diff --git a/hello b/hello +index 557db03..263414f 100644 +--- a/hello ++++ b/hello +@@ -1 +1,2 @@ + Hello World ++It's a new day for git +------------ + +i.e. the diff of the change we caused by adding another line to `hello`. + +In other words, 'git diff-files' always shows us the difference between +what is recorded in the index, and what is currently in the working +tree. That's very useful. + +A common shorthand for `git diff-files -p` is to just write `git +diff`, which will do the same thing. + +------------ +$ git diff +diff --git a/hello b/hello +index 557db03..263414f 100644 +--- a/hello ++++ b/hello +@@ -1 +1,2 @@ + Hello World ++It's a new day for git +------------ + + +Committing Git state +-------------------- + +Now, we want to go to the next stage in Git, which is to take the files +that Git knows about in the index, and commit them as a real tree. We do +that in two phases: creating a 'tree' object, and committing that 'tree' +object as a 'commit' object together with an explanation of what the +tree was all about, along with information of how we came to that state. + +Creating a tree object is trivial, and is done with 'git write-tree'. +There are no options or other input: `git write-tree` will take the +current index state, and write an object that describes that whole +index. In other words, we're now tying together all the different +filenames with their contents (and their permissions), and we're +creating the equivalent of a Git "directory" object: + +------------------------------------------------ +$ git write-tree +------------------------------------------------ + +and this will just output the name of the resulting tree, in this case +(if you have done exactly as I've described) it should be + +---------------- +8988da15d077d4829fc51d8544c097def6644dbb +---------------- + +which is another incomprehensible object name. Again, if you want to, +you can use `git cat-file -t 8988d...` to see that this time the object +is not a "blob" object, but a "tree" object (you can also use +`git cat-file` to actually output the raw object contents, but you'll see +mainly a binary mess, so that's less interesting). + +However -- normally you'd never use 'git write-tree' on its own, because +normally you always commit a tree into a commit object using the +'git commit-tree' command. In fact, it's easier to not actually use +'git write-tree' on its own at all, but to just pass its result in as an +argument to 'git commit-tree'. + +'git commit-tree' normally takes several arguments -- it wants to know +what the 'parent' of a commit was, but since this is the first commit +ever in this new repository, and it has no parents, we only need to pass in +the object name of the tree. However, 'git commit-tree' also wants to get a +commit message on its standard input, and it will write out the resulting +object name for the commit to its standard output. + +And this is where we create the `.git/refs/heads/master` file +which is pointed at by `HEAD`. This file is supposed to contain +the reference to the top-of-tree of the master branch, and since +that's exactly what 'git commit-tree' spits out, we can do this +all with a sequence of simple shell commands: + +------------------------------------------------ +$ tree=$(git write-tree) +$ commit=$(echo 'Initial commit' | git commit-tree $tree) +$ git update-ref HEAD $commit +------------------------------------------------ + +In this case this creates a totally new commit that is not related to +anything else. Normally you do this only *once* for a project ever, and +all later commits will be parented on top of an earlier commit. + +Again, normally you'd never actually do this by hand. There is a +helpful script called `git commit` that will do all of this for you. So +you could have just written `git commit` +instead, and it would have done the above magic scripting for you. + + +Making a change +--------------- + +Remember how we did the 'git update-index' on file `hello` and then we +changed `hello` afterward, and could compare the new state of `hello` with the +state we saved in the index file? + +Further, remember how I said that 'git write-tree' writes the contents +of the *index* file to the tree, and thus what we just committed was in +fact the *original* contents of the file `hello`, not the new ones. We did +that on purpose, to show the difference between the index state, and the +state in the working tree, and how they don't have to match, even +when we commit things. + +As before, if we do `git diff-files -p` in our git-tutorial project, +we'll still see the same difference we saw last time: the index file +hasn't changed by the act of committing anything. However, now that we +have committed something, we can also learn to use a new command: +'git diff-index'. + +Unlike 'git diff-files', which showed the difference between the index +file and the working tree, 'git diff-index' shows the differences +between a committed *tree* and either the index file or the working +tree. In other words, 'git diff-index' wants a tree to be diffed +against, and before we did the commit, we couldn't do that, because we +didn't have anything to diff against. + +But now we can do + +---------------- +$ git diff-index -p HEAD +---------------- + +(where `-p` has the same meaning as it did in 'git diff-files'), and it +will show us the same difference, but for a totally different reason. +Now we're comparing the working tree not against the index file, +but against the tree we just wrote. It just so happens that those two +are obviously the same, so we get the same result. + +Again, because this is a common operation, you can also just shorthand +it with + +---------------- +$ git diff HEAD +---------------- + +which ends up doing the above for you. + +In other words, 'git diff-index' normally compares a tree against the +working tree, but when given the `--cached` flag, it is told to +instead compare against just the index cache contents, and ignore the +current working tree state entirely. Since we just wrote the index +file to HEAD, doing `git diff-index --cached -p HEAD` should thus return +an empty set of differences, and that's exactly what it does. + +[NOTE] +================ +'git diff-index' really always uses the index for its +comparisons, and saying that it compares a tree against the working +tree is thus not strictly accurate. In particular, the list of +files to compare (the "meta-data") *always* comes from the index file, +regardless of whether the `--cached` flag is used or not. The `--cached` +flag really only determines whether the file *contents* to be compared +come from the working tree or not. + +This is not hard to understand, as soon as you realize that Git simply +never knows (or cares) about files that it is not told about +explicitly. Git will never go *looking* for files to compare, it +expects you to tell it what the files are, and that's what the index +is there for. +================ + +However, our next step is to commit the *change* we did, and again, to +understand what's going on, keep in mind the difference between "working +tree contents", "index file" and "committed tree". We have changes +in the working tree that we want to commit, and we always have to +work through the index file, so the first thing we need to do is to +update the index cache: + +------------------------------------------------ +$ git update-index hello +------------------------------------------------ + +(note how we didn't need the `--add` flag this time, since Git knew +about the file already). + +Note what happens to the different 'git diff-{asterisk}' versions here. +After we've updated `hello` in the index, `git diff-files -p` now shows no +differences, but `git diff-index -p HEAD` still *does* show that the +current state is different from the state we committed. In fact, now +'git diff-index' shows the same difference whether we use the `--cached` +flag or not, since now the index is coherent with the working tree. + +Now, since we've updated `hello` in the index, we can commit the new +version. We could do it by writing the tree by hand again, and +committing the tree (this time we'd have to use the `-p HEAD` flag to +tell commit that the HEAD was the *parent* of the new commit, and that +this wasn't an initial commit any more), but you've done that once +already, so let's just use the helpful script this time: + +------------------------------------------------ +$ git commit +------------------------------------------------ + +which starts an editor for you to write the commit message and tells you +a bit about what you have done. + +Write whatever message you want, and all the lines that start with '#' +will be pruned out, and the rest will be used as the commit message for +the change. If you decide you don't want to commit anything after all at +this point (you can continue to edit things and update the index), you +can just leave an empty message. Otherwise `git commit` will commit +the change for you. + +You've now made your first real Git commit. And if you're interested in +looking at what `git commit` really does, feel free to investigate: +it's a few very simple shell scripts to generate the helpful (?) commit +message headers, and a few one-liners that actually do the +commit itself ('git commit'). + + +Inspecting Changes +------------------ + +While creating changes is useful, it's even more useful if you can tell +later what changed. The most useful command for this is another of the +'diff' family, namely 'git diff-tree'. + +'git diff-tree' can be given two arbitrary trees, and it will tell you the +differences between them. Perhaps even more commonly, though, you can +give it just a single commit object, and it will figure out the parent +of that commit itself, and show the difference directly. Thus, to get +the same diff that we've already seen several times, we can now do + +---------------- +$ git diff-tree -p HEAD +---------------- + +(again, `-p` means to show the difference as a human-readable patch), +and it will show what the last commit (in `HEAD`) actually changed. + +[NOTE] +============ +Here is an ASCII art by Jon Loeliger that illustrates how +various 'diff-{asterisk}' commands compare things. + + diff-tree + +----+ + | | + | | + V V + +-----------+ + | Object DB | + | Backing | + | Store | + +-----------+ + ^ ^ + | | + | | diff-index --cached + | | + diff-index | V + | +-----------+ + | | Index | + | | "cache" | + | +-----------+ + | ^ + | | + | | diff-files + | | + V V + +-----------+ + | Working | + | Directory | + +-----------+ +============ + +More interestingly, you can also give 'git diff-tree' the `--pretty` flag, +which tells it to also show the commit message and author and date of the +commit, and you can tell it to show a whole series of diffs. +Alternatively, you can tell it to be "silent", and not show the diffs at +all, but just show the actual commit message. + +In fact, together with the 'git rev-list' program (which generates a +list of revisions), 'git diff-tree' ends up being a veritable fount of +changes. You can emulate `git log`, `git log -p`, etc. with a trivial +script that pipes the output of `git rev-list` to `git diff-tree --stdin`, +which was exactly how early versions of `git log` were implemented. + + +Tagging a version +----------------- + +In Git, there are two kinds of tags, a "light" one, and an "annotated tag". + +A "light" tag is technically nothing more than a branch, except we put +it in the `.git/refs/tags/` subdirectory instead of calling it a `head`. +So the simplest form of tag involves nothing more than + +------------------------------------------------ +$ git tag my-first-tag +------------------------------------------------ + +which just writes the current `HEAD` into the `.git/refs/tags/my-first-tag` +file, after which point you can then use this symbolic name for that +particular state. You can, for example, do + +---------------- +$ git diff my-first-tag +---------------- + +to diff your current state against that tag which at this point will +obviously be an empty diff, but if you continue to develop and commit +stuff, you can use your tag as an "anchor-point" to see what has changed +since you tagged it. + +An "annotated tag" is actually a real Git object, and contains not only a +pointer to the state you want to tag, but also a small tag name and +message, along with optionally a PGP signature that says that yes, +you really did +that tag. You create these annotated tags with either the `-a` or +`-s` flag to 'git tag': + +---------------- +$ git tag -s <tagname> +---------------- + +which will sign the current `HEAD` (but you can also give it another +argument that specifies the thing to tag, e.g., you could have tagged the +current `mybranch` point by using `git tag <tagname> mybranch`). + +You normally only do signed tags for major releases or things +like that, while the light-weight tags are useful for any marking you +want to do -- any time you decide that you want to remember a certain +point, just create a private tag for it, and you have a nice symbolic +name for the state at that point. + + +Copying repositories +-------------------- + +Git repositories are normally totally self-sufficient and relocatable. +Unlike CVS, for example, there is no separate notion of +"repository" and "working tree". A Git repository normally *is* the +working tree, with the local Git information hidden in the `.git` +subdirectory. There is nothing else. What you see is what you got. + +[NOTE] +You can tell Git to split the Git internal information from +the directory that it tracks, but we'll ignore that for now: it's not +how normal projects work, and it's really only meant for special uses. +So the mental model of "the Git information is always tied directly to +the working tree that it describes" may not be technically 100% +accurate, but it's a good model for all normal use. + +This has two implications: + + - if you grow bored with the tutorial repository you created (or you've + made a mistake and want to start all over), you can just do simple ++ +---------------- +$ rm -rf git-tutorial +---------------- ++ +and it will be gone. There's no external repository, and there's no +history outside the project you created. + + - if you want to move or duplicate a Git repository, you can do so. There + is 'git clone' command, but if all you want to do is just to + create a copy of your repository (with all the full history that + went along with it), you can do so with a regular + `cp -a git-tutorial new-git-tutorial`. ++ +Note that when you've moved or copied a Git repository, your Git index +file (which caches various information, notably some of the "stat" +information for the files involved) will likely need to be refreshed. +So after you do a `cp -a` to create a new copy, you'll want to do ++ +---------------- +$ git update-index --refresh +---------------- ++ +in the new repository to make sure that the index file is up-to-date. + +Note that the second point is true even across machines. You can +duplicate a remote Git repository with *any* regular copy mechanism, be it +'scp', 'rsync' or 'wget'. + +When copying a remote repository, you'll want to at a minimum update the +index cache when you do this, and especially with other peoples' +repositories you often want to make sure that the index cache is in some +known state (you don't know *what* they've done and not yet checked in), +so usually you'll precede the 'git update-index' with a + +---------------- +$ git read-tree --reset HEAD +$ git update-index --refresh +---------------- + +which will force a total index re-build from the tree pointed to by `HEAD`. +It resets the index contents to `HEAD`, and then the 'git update-index' +makes sure to match up all index entries with the checked-out files. +If the original repository had uncommitted changes in its +working tree, `git update-index --refresh` notices them and +tells you they need to be updated. + +The above can also be written as simply + +---------------- +$ git reset +---------------- + +and in fact a lot of the common Git command combinations can be scripted +with the `git xyz` interfaces. You can learn things by just looking +at what the various git scripts do. For example, `git reset` used to be +the above two lines implemented in 'git reset', but some things like +'git status' and 'git commit' are slightly more complex scripts around +the basic Git commands. + +Many (most?) public remote repositories will not contain any of +the checked out files or even an index file, and will *only* contain the +actual core Git files. Such a repository usually doesn't even have the +`.git` subdirectory, but has all the Git files directly in the +repository. + +To create your own local live copy of such a "raw" Git repository, you'd +first create your own subdirectory for the project, and then copy the +raw repository contents into the `.git` directory. For example, to +create your own copy of the Git repository, you'd do the following + +---------------- +$ mkdir my-git +$ cd my-git +$ rsync -rL rsync://rsync.kernel.org/pub/scm/git/git.git/ .git +---------------- + +followed by + +---------------- +$ git read-tree HEAD +---------------- + +to populate the index. However, now you have populated the index, and +you have all the Git internal files, but you will notice that you don't +actually have any of the working tree files to work on. To get +those, you'd check them out with + +---------------- +$ git checkout-index -u -a +---------------- + +where the `-u` flag means that you want the checkout to keep the index +up-to-date (so that you don't have to refresh it afterward), and the +`-a` flag means "check out all files" (if you have a stale copy or an +older version of a checked out tree you may also need to add the `-f` +flag first, to tell 'git checkout-index' to *force* overwriting of any old +files). + +Again, this can all be simplified with + +---------------- +$ git clone git://git.kernel.org/pub/scm/git/git.git/ my-git +$ cd my-git +$ git checkout +---------------- + +which will end up doing all of the above for you. + +You have now successfully copied somebody else's (mine) remote +repository, and checked it out. + + +Creating a new branch +--------------------- + +Branches in Git are really nothing more than pointers into the Git +object database from within the `.git/refs/` subdirectory, and as we +already discussed, the `HEAD` branch is nothing but a symlink to one of +these object pointers. + +You can at any time create a new branch by just picking an arbitrary +point in the project history, and just writing the SHA-1 name of that +object into a file under `.git/refs/heads/`. You can use any filename you +want (and indeed, subdirectories), but the convention is that the +"normal" branch is called `master`. That's just a convention, though, +and nothing enforces it. + +To show that as an example, let's go back to the git-tutorial repository we +used earlier, and create a branch in it. You do that by simply just +saying that you want to check out a new branch: + +------------ +$ git checkout -b mybranch +------------ + +will create a new branch based at the current `HEAD` position, and switch +to it. + +[NOTE] +================================================ +If you make the decision to start your new branch at some +other point in the history than the current `HEAD`, you can do so by +just telling 'git checkout' what the base of the checkout would be. +In other words, if you have an earlier tag or branch, you'd just do + +------------ +$ git checkout -b mybranch earlier-commit +------------ + +and it would create the new branch `mybranch` at the earlier commit, +and check out the state at that time. +================================================ + +You can always just jump back to your original `master` branch by doing + +------------ +$ git checkout master +------------ + +(or any other branch-name, for that matter) and if you forget which +branch you happen to be on, a simple + +------------ +$ cat .git/HEAD +------------ + +will tell you where it's pointing. To get the list of branches +you have, you can say + +------------ +$ git branch +------------ + +which used to be nothing more than a simple script around `ls .git/refs/heads`. +There will be an asterisk in front of the branch you are currently on. + +Sometimes you may wish to create a new branch _without_ actually +checking it out and switching to it. If so, just use the command + +------------ +$ git branch <branchname> [startingpoint] +------------ + +which will simply _create_ the branch, but will not do anything further. +You can then later -- once you decide that you want to actually develop +on that branch -- switch to that branch with a regular 'git checkout' +with the branchname as the argument. + + +Merging two branches +-------------------- + +One of the ideas of having a branch is that you do some (possibly +experimental) work in it, and eventually merge it back to the main +branch. So assuming you created the above `mybranch` that started out +being the same as the original `master` branch, let's make sure we're in +that branch, and do some work there. + +------------------------------------------------ +$ git checkout mybranch +$ echo "Work, work, work" >>hello +$ git commit -m "Some work." -i hello +------------------------------------------------ + +Here, we just added another line to `hello`, and we used a shorthand for +doing both `git update-index hello` and `git commit` by just giving the +filename directly to `git commit`, with an `-i` flag (it tells +Git to 'include' that file in addition to what you have done to +the index file so far when making the commit). The `-m` flag is to give the +commit log message from the command line. + +Now, to make it a bit more interesting, let's assume that somebody else +does some work in the original branch, and simulate that by going back +to the master branch, and editing the same file differently there: + +------------ +$ git checkout master +------------ + +Here, take a moment to look at the contents of `hello`, and notice how they +don't contain the work we just did in `mybranch` -- because that work +hasn't happened in the `master` branch at all. Then do + +------------ +$ echo "Play, play, play" >>hello +$ echo "Lots of fun" >>example +$ git commit -m "Some fun." -i hello example +------------ + +since the master branch is obviously in a much better mood. + +Now, you've got two branches, and you decide that you want to merge the +work done. Before we do that, let's introduce a cool graphical tool that +helps you view what's going on: + +---------------- +$ gitk --all +---------------- + +will show you graphically both of your branches (that's what the `--all` +means: normally it will just show you your current `HEAD`) and their +histories. You can also see exactly how they came to be from a common +source. + +Anyway, let's exit 'gitk' (`^Q` or the File menu), and decide that we want +to merge the work we did on the `mybranch` branch into the `master` +branch (which is currently our `HEAD` too). To do that, there's a nice +script called 'git merge', which wants to know which branches you want +to resolve and what the merge is all about: + +------------ +$ git merge -m "Merge work in mybranch" mybranch +------------ + +where the first argument is going to be used as the commit message if +the merge can be resolved automatically. + +Now, in this case we've intentionally created a situation where the +merge will need to be fixed up by hand, though, so Git will do as much +of it as it can automatically (which in this case is just merge the `example` +file, which had no differences in the `mybranch` branch), and say: + +---------------- + Auto-merging hello + CONFLICT (content): Merge conflict in hello + Automatic merge failed; fix conflicts and then commit the result. +---------------- + +It tells you that it did an "Automatic merge", which +failed due to conflicts in `hello`. + +Not to worry. It left the (trivial) conflict in `hello` in the same form you +should already be well used to if you've ever used CVS, so let's just +open `hello` in our editor (whatever that may be), and fix it up somehow. +I'd suggest just making it so that `hello` contains all four lines: + +------------ +Hello World +It's a new day for git +Play, play, play +Work, work, work +------------ + +and once you're happy with your manual merge, just do a + +------------ +$ git commit -i hello +------------ + +which will very loudly warn you that you're now committing a merge +(which is correct, so never mind), and you can write a small merge +message about your adventures in 'git merge'-land. + +After you're done, start up `gitk --all` to see graphically what the +history looks like. Notice that `mybranch` still exists, and you can +switch to it, and continue to work with it if you want to. The +`mybranch` branch will not contain the merge, but next time you merge it +from the `master` branch, Git will know how you merged it, so you'll not +have to do _that_ merge again. + +Another useful tool, especially if you do not always work in X-Window +environment, is `git show-branch`. + +------------------------------------------------ +$ git show-branch --topo-order --more=1 master mybranch +* [master] Merge work in mybranch + ! [mybranch] Some work. +-- +- [master] Merge work in mybranch +*+ [mybranch] Some work. +* [master^] Some fun. +------------------------------------------------ + +The first two lines indicate that it is showing the two branches +with the titles of their top-of-the-tree commits, you are currently on +`master` branch (notice the asterisk `*` character), and the first +column for the later output lines is used to show commits contained in the +`master` branch, and the second column for the `mybranch` +branch. Three commits are shown along with their titles. +All of them have non blank characters in the first column (`*` +shows an ordinary commit on the current branch, `-` is a merge commit), which +means they are now part of the `master` branch. Only the "Some +work" commit has the plus `+` character in the second column, +because `mybranch` has not been merged to incorporate these +commits from the master branch. The string inside brackets +before the commit log message is a short name you can use to +name the commit. In the above example, 'master' and 'mybranch' +are branch heads. 'master^' is the first parent of 'master' +branch head. Please see linkgit:gitrevisions[7] if you want to +see more complex cases. + +[NOTE] +Without the '--more=1' option, 'git show-branch' would not output the +'[master^]' commit, as '[mybranch]' commit is a common ancestor of +both 'master' and 'mybranch' tips. Please see linkgit:git-show-branch[1] +for details. + +[NOTE] +If there were more commits on the 'master' branch after the merge, the +merge commit itself would not be shown by 'git show-branch' by +default. You would need to provide '--sparse' option to make the +merge commit visible in this case. + +Now, let's pretend you are the one who did all the work in +`mybranch`, and the fruit of your hard work has finally been merged +to the `master` branch. Let's go back to `mybranch`, and run +'git merge' to get the "upstream changes" back to your branch. + +------------ +$ git checkout mybranch +$ git merge -m "Merge upstream changes." master +------------ + +This outputs something like this (the actual commit object names +would be different) + +---------------- +Updating from ae3a2da... to a80b4aa.... +Fast-forward (no commit created; -m option ignored) + example | 1 + + hello | 1 + + 2 files changed, 2 insertions(+) +---------------- + +Because your branch did not contain anything more than what had +already been merged into the `master` branch, the merge operation did +not actually do a merge. Instead, it just updated the top of +the tree of your branch to that of the `master` branch. This is +often called 'fast-forward' merge. + +You can run `gitk --all` again to see how the commit ancestry +looks like, or run 'show-branch', which tells you this. + +------------------------------------------------ +$ git show-branch master mybranch +! [master] Merge work in mybranch + * [mybranch] Merge work in mybranch +-- +-- [master] Merge work in mybranch +------------------------------------------------ + + +Merging external work +--------------------- + +It's usually much more common that you merge with somebody else than +merging with your own branches, so it's worth pointing out that Git +makes that very easy too, and in fact, it's not that different from +doing a 'git merge'. In fact, a remote merge ends up being nothing +more than "fetch the work from a remote repository into a temporary tag" +followed by a 'git merge'. + +Fetching from a remote repository is done by, unsurprisingly, +'git fetch': + +---------------- +$ git fetch <remote-repository> +---------------- + +One of the following transports can be used to name the +repository to download from: + +SSH:: + `remote.machine:/path/to/repo.git/` or ++ +`ssh://remote.machine/path/to/repo.git/` ++ +This transport can be used for both uploading and downloading, +and requires you to have a log-in privilege over `ssh` to the +remote machine. It finds out the set of objects the other side +lacks by exchanging the head commits both ends have and +transfers (close to) minimum set of objects. It is by far the +most efficient way to exchange Git objects between repositories. + +Local directory:: + `/path/to/repo.git/` ++ +This transport is the same as SSH transport but uses 'sh' to run +both ends on the local machine instead of running other end on +the remote machine via 'ssh'. + +Git Native:: + `git://remote.machine/path/to/repo.git/` ++ +This transport was designed for anonymous downloading. Like SSH +transport, it finds out the set of objects the downstream side +lacks and transfers (close to) minimum set of objects. + +HTTP(S):: + `http://remote.machine/path/to/repo.git/` ++ +Downloader from http and https URL +first obtains the topmost commit object name from the remote site +by looking at the specified refname under `repo.git/refs/` directory, +and then tries to obtain the +commit object by downloading from `repo.git/objects/xx/xxx...` +using the object name of that commit object. Then it reads the +commit object to find out its parent commits and the associate +tree object; it repeats this process until it gets all the +necessary objects. Because of this behavior, they are +sometimes also called 'commit walkers'. ++ +The 'commit walkers' are sometimes also called 'dumb +transports', because they do not require any Git aware smart +server like Git Native transport does. Any stock HTTP server +that does not even support directory index would suffice. But +you must prepare your repository with 'git update-server-info' +to help dumb transport downloaders. + +Once you fetch from the remote repository, you `merge` that +with your current branch. + +However -- it's such a common thing to `fetch` and then +immediately `merge`, that it's called `git pull`, and you can +simply do + +---------------- +$ git pull <remote-repository> +---------------- + +and optionally give a branch-name for the remote end as a second +argument. + +[NOTE] +You could do without using any branches at all, by +keeping as many local repositories as you would like to have +branches, and merging between them with 'git pull', just like +you merge between branches. The advantage of this approach is +that it lets you keep a set of files for each `branch` checked +out and you may find it easier to switch back and forth if you +juggle multiple lines of development simultaneously. Of +course, you will pay the price of more disk usage to hold +multiple working trees, but disk space is cheap these days. + +It is likely that you will be pulling from the same remote +repository from time to time. As a short hand, you can store +the remote repository URL in the local repository's config file +like this: + +------------------------------------------------ +$ git config remote.linus.url http://www.kernel.org/pub/scm/git/git.git/ +------------------------------------------------ + +and use the "linus" keyword with 'git pull' instead of the full URL. + +Examples. + +. `git pull linus` +. `git pull linus tag v0.99.1` + +the above are equivalent to: + +. `git pull http://www.kernel.org/pub/scm/git/git.git/ HEAD` +. `git pull http://www.kernel.org/pub/scm/git/git.git/ tag v0.99.1` + + +How does the merge work? +------------------------ + +We said this tutorial shows what plumbing does to help you cope +with the porcelain that isn't flushing, but we so far did not +talk about how the merge really works. If you are following +this tutorial the first time, I'd suggest to skip to "Publishing +your work" section and come back here later. + +OK, still with me? To give us an example to look at, let's go +back to the earlier repository with "hello" and "example" file, +and bring ourselves back to the pre-merge state: + +------------ +$ git show-branch --more=2 master mybranch +! [master] Merge work in mybranch + * [mybranch] Merge work in mybranch +-- +-- [master] Merge work in mybranch ++* [master^2] Some work. ++* [master^] Some fun. +------------ + +Remember, before running 'git merge', our `master` head was at +"Some fun." commit, while our `mybranch` head was at "Some +work." commit. + +------------ +$ git checkout mybranch +$ git reset --hard master^2 +$ git checkout master +$ git reset --hard master^ +------------ + +After rewinding, the commit structure should look like this: + +------------ +$ git show-branch +* [master] Some fun. + ! [mybranch] Some work. +-- +* [master] Some fun. + + [mybranch] Some work. +*+ [master^] Initial commit +------------ + +Now we are ready to experiment with the merge by hand. + +`git merge` command, when merging two branches, uses 3-way merge +algorithm. First, it finds the common ancestor between them. +The command it uses is 'git merge-base': + +------------ +$ mb=$(git merge-base HEAD mybranch) +------------ + +The command writes the commit object name of the common ancestor +to the standard output, so we captured its output to a variable, +because we will be using it in the next step. By the way, the common +ancestor commit is the "Initial commit" commit in this case. You can +tell it by: + +------------ +$ git name-rev --name-only --tags $mb +my-first-tag +------------ + +After finding out a common ancestor commit, the second step is +this: + +------------ +$ git read-tree -m -u $mb HEAD mybranch +------------ + +This is the same 'git read-tree' command we have already seen, +but it takes three trees, unlike previous examples. This reads +the contents of each tree into different 'stage' in the index +file (the first tree goes to stage 1, the second to stage 2, +etc.). After reading three trees into three stages, the paths +that are the same in all three stages are 'collapsed' into stage +0. Also paths that are the same in two of three stages are +collapsed into stage 0, taking the SHA-1 from either stage 2 or +stage 3, whichever is different from stage 1 (i.e. only one side +changed from the common ancestor). + +After 'collapsing' operation, paths that are different in three +trees are left in non-zero stages. At this point, you can +inspect the index file with this command: + +------------ +$ git ls-files --stage +100644 7f8b141b65fdcee47321e399a2598a235a032422 0 example +100644 557db03de997c86a4a028e1ebd3a1ceb225be238 1 hello +100644 ba42a2a96e3027f3333e13ede4ccf4498c3ae942 2 hello +100644 cc44c73eb783565da5831b4d820c962954019b69 3 hello +------------ + +In our example of only two files, we did not have unchanged +files so only 'example' resulted in collapsing. But in real-life +large projects, when only a small number of files change in one commit, +this 'collapsing' tends to trivially merge most of the paths +fairly quickly, leaving only a handful of real changes in non-zero +stages. + +To look at only non-zero stages, use `--unmerged` flag: + +------------ +$ git ls-files --unmerged +100644 557db03de997c86a4a028e1ebd3a1ceb225be238 1 hello +100644 ba42a2a96e3027f3333e13ede4ccf4498c3ae942 2 hello +100644 cc44c73eb783565da5831b4d820c962954019b69 3 hello +------------ + +The next step of merging is to merge these three versions of the +file, using 3-way merge. This is done by giving +'git merge-one-file' command as one of the arguments to +'git merge-index' command: + +------------ +$ git merge-index git-merge-one-file hello +Auto-merging hello +ERROR: Merge conflict in hello +fatal: merge program failed +------------ + +'git merge-one-file' script is called with parameters to +describe those three versions, and is responsible to leave the +merge results in the working tree. +It is a fairly straightforward shell script, and +eventually calls 'merge' program from RCS suite to perform a +file-level 3-way merge. In this case, 'merge' detects +conflicts, and the merge result with conflict marks is left in +the working tree.. This can be seen if you run `ls-files +--stage` again at this point: + +------------ +$ git ls-files --stage +100644 7f8b141b65fdcee47321e399a2598a235a032422 0 example +100644 557db03de997c86a4a028e1ebd3a1ceb225be238 1 hello +100644 ba42a2a96e3027f3333e13ede4ccf4498c3ae942 2 hello +100644 cc44c73eb783565da5831b4d820c962954019b69 3 hello +------------ + +This is the state of the index file and the working file after +'git merge' returns control back to you, leaving the conflicting +merge for you to resolve. Notice that the path `hello` is still +unmerged, and what you see with 'git diff' at this point is +differences since stage 2 (i.e. your version). + + +Publishing your work +-------------------- + +So, we can use somebody else's work from a remote repository, but +how can *you* prepare a repository to let other people pull from +it? + +You do your real work in your working tree that has your +primary repository hanging under it as its `.git` subdirectory. +You *could* make that repository accessible remotely and ask +people to pull from it, but in practice that is not the way +things are usually done. A recommended way is to have a public +repository, make it reachable by other people, and when the +changes you made in your primary working tree are in good shape, +update the public repository from it. This is often called +'pushing'. + +[NOTE] +This public repository could further be mirrored, and that is +how Git repositories at `kernel.org` are managed. + +Publishing the changes from your local (private) repository to +your remote (public) repository requires a write privilege on +the remote machine. You need to have an SSH account there to +run a single command, 'git-receive-pack'. + +First, you need to create an empty repository on the remote +machine that will house your public repository. This empty +repository will be populated and be kept up-to-date by pushing +into it later. Obviously, this repository creation needs to be +done only once. + +[NOTE] +'git push' uses a pair of commands, +'git send-pack' on your local machine, and 'git-receive-pack' +on the remote machine. The communication between the two over +the network internally uses an SSH connection. + +Your private repository's Git directory is usually `.git`, but +your public repository is often named after the project name, +i.e. `<project>.git`. Let's create such a public repository for +project `my-git`. After logging into the remote machine, create +an empty directory: + +------------ +$ mkdir my-git.git +------------ + +Then, make that directory into a Git repository by running +'git init', but this time, since its name is not the usual +`.git`, we do things slightly differently: + +------------ +$ GIT_DIR=my-git.git git init +------------ + +Make sure this directory is available for others you want your +changes to be pulled via the transport of your choice. Also +you need to make sure that you have the 'git-receive-pack' +program on the `$PATH`. + +[NOTE] +Many installations of sshd do not invoke your shell as the login +shell when you directly run programs; what this means is that if +your login shell is 'bash', only `.bashrc` is read and not +`.bash_profile`. As a workaround, make sure `.bashrc` sets up +`$PATH` so that you can run 'git-receive-pack' program. + +[NOTE] +If you plan to publish this repository to be accessed over http, +you should do `mv my-git.git/hooks/post-update.sample +my-git.git/hooks/post-update` at this point. +This makes sure that every time you push into this +repository, `git update-server-info` is run. + +Your "public repository" is now ready to accept your changes. +Come back to the machine you have your private repository. From +there, run this command: + +------------ +$ git push <public-host>:/path/to/my-git.git master +------------ + +This synchronizes your public repository to match the named +branch head (i.e. `master` in this case) and objects reachable +from them in your current repository. + +As a real example, this is how I update my public Git +repository. Kernel.org mirror network takes care of the +propagation to other publicly visible machines: + +------------ +$ git push master.kernel.org:/pub/scm/git/git.git/ +------------ + + +Packing your repository +----------------------- + +Earlier, we saw that one file under `.git/objects/??/` directory +is stored for each Git object you create. This representation +is efficient to create atomically and safely, but +not so convenient to transport over the network. Since Git objects are +immutable once they are created, there is a way to optimize the +storage by "packing them together". The command + +------------ +$ git repack +------------ + +will do it for you. If you followed the tutorial examples, you +would have accumulated about 17 objects in `.git/objects/??/` +directories by now. 'git repack' tells you how many objects it +packed, and stores the packed file in `.git/objects/pack` +directory. + +[NOTE] +You will see two files, `pack-*.pack` and `pack-*.idx`, +in `.git/objects/pack` directory. They are closely related to +each other, and if you ever copy them by hand to a different +repository for whatever reason, you should make sure you copy +them together. The former holds all the data from the objects +in the pack, and the latter holds the index for random +access. + +If you are paranoid, running 'git verify-pack' command would +detect if you have a corrupt pack, but do not worry too much. +Our programs are always perfect ;-). + +Once you have packed objects, you do not need to leave the +unpacked objects that are contained in the pack file anymore. + +------------ +$ git prune-packed +------------ + +would remove them for you. + +You can try running `find .git/objects -type f` before and after +you run `git prune-packed` if you are curious. Also `git +count-objects` would tell you how many unpacked objects are in +your repository and how much space they are consuming. + +[NOTE] +`git pull` is slightly cumbersome for HTTP transport, as a +packed repository may contain relatively few objects in a +relatively large pack. If you expect many HTTP pulls from your +public repository you might want to repack & prune often, or +never. + +If you run `git repack` again at this point, it will say +"Nothing new to pack.". Once you continue your development and +accumulate the changes, running `git repack` again will create a +new pack, that contains objects created since you packed your +repository the last time. We recommend that you pack your project +soon after the initial import (unless you are starting your +project from scratch), and then run `git repack` every once in a +while, depending on how active your project is. + +When a repository is synchronized via `git push` and `git pull` +objects packed in the source repository are usually stored +unpacked in the destination. +While this allows you to use different packing strategies on +both ends, it also means you may need to repack both +repositories every once in a while. + + +Working with Others +------------------- + +Although Git is a truly distributed system, it is often +convenient to organize your project with an informal hierarchy +of developers. Linux kernel development is run this way. There +is a nice illustration (page 17, "Merges to Mainline") in +http://www.xenotime.net/linux/mentor/linux-mentoring-2006.pdf[Randy Dunlap's presentation]. + +It should be stressed that this hierarchy is purely *informal*. +There is nothing fundamental in Git that enforces the "chain of +patch flow" this hierarchy implies. You do not have to pull +from only one remote repository. + +A recommended workflow for a "project lead" goes like this: + +1. Prepare your primary repository on your local machine. Your + work is done there. + +2. Prepare a public repository accessible to others. ++ +If other people are pulling from your repository over dumb +transport protocols (HTTP), you need to keep this repository +'dumb transport friendly'. After `git init`, +`$GIT_DIR/hooks/post-update.sample` copied from the standard templates +would contain a call to 'git update-server-info' +but you need to manually enable the hook with +`mv post-update.sample post-update`. This makes sure +'git update-server-info' keeps the necessary files up-to-date. + +3. Push into the public repository from your primary + repository. + +4. 'git repack' the public repository. This establishes a big + pack that contains the initial set of objects as the + baseline, and possibly 'git prune' if the transport + used for pulling from your repository supports packed + repositories. + +5. Keep working in your primary repository. Your changes + include modifications of your own, patches you receive via + e-mails, and merges resulting from pulling the "public" + repositories of your "subsystem maintainers". ++ +You can repack this private repository whenever you feel like. + +6. Push your changes to the public repository, and announce it + to the public. + +7. Every once in a while, 'git repack' the public repository. + Go back to step 5. and continue working. + + +A recommended work cycle for a "subsystem maintainer" who works +on that project and has an own "public repository" goes like this: + +1. Prepare your work repository, by 'git clone' the public + repository of the "project lead". The URL used for the + initial cloning is stored in the remote.origin.url + configuration variable. + +2. Prepare a public repository accessible to others, just like + the "project lead" person does. + +3. Copy over the packed files from "project lead" public + repository to your public repository, unless the "project + lead" repository lives on the same machine as yours. In the + latter case, you can use `objects/info/alternates` file to + point at the repository you are borrowing from. + +4. Push into the public repository from your primary + repository. Run 'git repack', and possibly 'git prune' if the + transport used for pulling from your repository supports + packed repositories. + +5. Keep working in your primary repository. Your changes + include modifications of your own, patches you receive via + e-mails, and merges resulting from pulling the "public" + repositories of your "project lead" and possibly your + "sub-subsystem maintainers". ++ +You can repack this private repository whenever you feel +like. + +6. Push your changes to your public repository, and ask your + "project lead" and possibly your "sub-subsystem + maintainers" to pull from it. + +7. Every once in a while, 'git repack' the public repository. + Go back to step 5. and continue working. + + +A recommended work cycle for an "individual developer" who does +not have a "public" repository is somewhat different. It goes +like this: + +1. Prepare your work repository, by 'git clone' the public + repository of the "project lead" (or a "subsystem + maintainer", if you work on a subsystem). The URL used for + the initial cloning is stored in the remote.origin.url + configuration variable. + +2. Do your work in your repository on 'master' branch. + +3. Run `git fetch origin` from the public repository of your + upstream every once in a while. This does only the first + half of `git pull` but does not merge. The head of the + public repository is stored in `.git/refs/remotes/origin/master`. + +4. Use `git cherry origin` to see which ones of your patches + were accepted, and/or use `git rebase origin` to port your + unmerged changes forward to the updated upstream. + +5. Use `git format-patch origin` to prepare patches for e-mail + submission to your upstream and send it out. Go back to + step 2. and continue. + + +Working with Others, Shared Repository Style +-------------------------------------------- + +If you are coming from CVS background, the style of cooperation +suggested in the previous section may be new to you. You do not +have to worry. Git supports "shared public repository" style of +cooperation you are probably more familiar with as well. + +See linkgit:gitcvs-migration[7] for the details. + +Bundling your work together +--------------------------- + +It is likely that you will be working on more than one thing at +a time. It is easy to manage those more-or-less independent tasks +using branches with Git. + +We have already seen how branches work previously, +with "fun and work" example using two branches. The idea is the +same if there are more than two branches. Let's say you started +out from "master" head, and have some new code in the "master" +branch, and two independent fixes in the "commit-fix" and +"diff-fix" branches: + +------------ +$ git show-branch +! [commit-fix] Fix commit message normalization. + ! [diff-fix] Fix rename detection. + * [master] Release candidate #1 +--- + + [diff-fix] Fix rename detection. + + [diff-fix~1] Better common substring algorithm. ++ [commit-fix] Fix commit message normalization. + * [master] Release candidate #1 +++* [diff-fix~2] Pretty-print messages. +------------ + +Both fixes are tested well, and at this point, you want to merge +in both of them. You could merge in 'diff-fix' first and then +'commit-fix' next, like this: + +------------ +$ git merge -m "Merge fix in diff-fix" diff-fix +$ git merge -m "Merge fix in commit-fix" commit-fix +------------ + +Which would result in: + +------------ +$ git show-branch +! [commit-fix] Fix commit message normalization. + ! [diff-fix] Fix rename detection. + * [master] Merge fix in commit-fix +--- + - [master] Merge fix in commit-fix ++ * [commit-fix] Fix commit message normalization. + - [master~1] Merge fix in diff-fix + +* [diff-fix] Fix rename detection. + +* [diff-fix~1] Better common substring algorithm. + * [master~2] Release candidate #1 +++* [master~3] Pretty-print messages. +------------ + +However, there is no particular reason to merge in one branch +first and the other next, when what you have are a set of truly +independent changes (if the order mattered, then they are not +independent by definition). You could instead merge those two +branches into the current branch at once. First let's undo what +we just did and start over. We would want to get the master +branch before these two merges by resetting it to 'master~2': + +------------ +$ git reset --hard master~2 +------------ + +You can make sure `git show-branch` matches the state before +those two 'git merge' you just did. Then, instead of running +two 'git merge' commands in a row, you would merge these two +branch heads (this is known as 'making an Octopus'): + +------------ +$ git merge commit-fix diff-fix +$ git show-branch +! [commit-fix] Fix commit message normalization. + ! [diff-fix] Fix rename detection. + * [master] Octopus merge of branches 'diff-fix' and 'commit-fix' +--- + - [master] Octopus merge of branches 'diff-fix' and 'commit-fix' ++ * [commit-fix] Fix commit message normalization. + +* [diff-fix] Fix rename detection. + +* [diff-fix~1] Better common substring algorithm. + * [master~1] Release candidate #1 +++* [master~2] Pretty-print messages. +------------ + +Note that you should not do Octopus because you can. An octopus +is a valid thing to do and often makes it easier to view the +commit history if you are merging more than two independent +changes at the same time. However, if you have merge conflicts +with any of the branches you are merging in and need to hand +resolve, that is an indication that the development happened in +those branches were not independent after all, and you should +merge two at a time, documenting how you resolved the conflicts, +and the reason why you preferred changes made in one side over +the other. Otherwise it would make the project history harder +to follow, not easier. + +SEE ALSO +-------- +linkgit:gittutorial[7], +linkgit:gittutorial-2[7], +linkgit:gitcvs-migration[7], +linkgit:git-help[1], +linkgit:giteveryday[7], +link:user-manual.html[The Git User's Manual] + +GIT +--- +Part of the linkgit:git[1] suite. diff --git a/Documentation/gitcredentials.txt b/Documentation/gitcredentials.txt new file mode 100644 index 0000000..1c75be0 --- /dev/null +++ b/Documentation/gitcredentials.txt @@ -0,0 +1,183 @@ +gitcredentials(7) +================= + +NAME +---- +gitcredentials - providing usernames and passwords to Git + +SYNOPSIS +-------- +------------------ +git config credential.https://example.com.username myusername +git config credential.helper "$helper $options" +------------------ + +DESCRIPTION +----------- + +Git will sometimes need credentials from the user in order to perform +operations; for example, it may need to ask for a username and password +in order to access a remote repository over HTTP. This manual describes +the mechanisms Git uses to request these credentials, as well as some +features to avoid inputting these credentials repeatedly. + +REQUESTING CREDENTIALS +---------------------- + +Without any credential helpers defined, Git will try the following +strategies to ask the user for usernames and passwords: + +1. If the `GIT_ASKPASS` environment variable is set, the program + specified by the variable is invoked. A suitable prompt is provided + to the program on the command line, and the user's input is read + from its standard output. + +2. Otherwise, if the `core.askPass` configuration variable is set, its + value is used as above. + +3. Otherwise, if the `SSH_ASKPASS` environment variable is set, its + value is used as above. + +4. Otherwise, the user is prompted on the terminal. + +AVOIDING REPETITION +------------------- + +It can be cumbersome to input the same credentials over and over. Git +provides two methods to reduce this annoyance: + +1. Static configuration of usernames for a given authentication context. + +2. Credential helpers to cache or store passwords, or to interact with + a system password wallet or keychain. + +The first is simple and appropriate if you do not have secure storage available +for a password. It is generally configured by adding this to your config: + +--------------------------------------- +[credential "https://example.com"] + username = me +--------------------------------------- + +Credential helpers, on the other hand, are external programs from which Git can +request both usernames and passwords; they typically interface with secure +storage provided by the OS or other programs. + +To use a helper, you must first select one to use. Git currently +includes the following helpers: + +cache:: + + Cache credentials in memory for a short period of time. See + linkgit:git-credential-cache[1] for details. + +store:: + + Store credentials indefinitely on disk. See + linkgit:git-credential-store[1] for details. + +You may also have third-party helpers installed; search for +`credential-*` in the output of `git help -a`, and consult the +documentation of individual helpers. Once you have selected a helper, +you can tell Git to use it by putting its name into the +credential.helper variable. + +1. Find a helper. ++ +------------------------------------------- +$ git help -a | grep credential- +credential-foo +------------------------------------------- + +2. Read its description. ++ +------------------------------------------- +$ git help credential-foo +------------------------------------------- + +3. Tell Git to use it. ++ +------------------------------------------- +$ git config --global credential.helper foo +------------------------------------------- + +If there are multiple instances of the `credential.helper` configuration +variable, each helper will be tried in turn, and may provide a username, +password, or nothing. Once Git has acquired both a username and a +password, no more helpers will be tried. + + +CREDENTIAL CONTEXTS +------------------- + +Git considers each credential to have a context defined by a URL. This context +is used to look up context-specific configuration, and is passed to any +helpers, which may use it as an index into secure storage. + +For instance, imagine we are accessing `https://example.com/foo.git`. When Git +looks into a config file to see if a section matches this context, it will +consider the two a match if the context is a more-specific subset of the +pattern in the config file. For example, if you have this in your config file: + +-------------------------------------- +[credential "https://example.com"] + username = foo +-------------------------------------- + +then we will match: both protocols are the same, both hosts are the same, and +the "pattern" URL does not care about the path component at all. However, this +context would not match: + +-------------------------------------- +[credential "https://kernel.org"] + username = foo +-------------------------------------- + +because the hostnames differ. Nor would it match `foo.example.com`; Git +compares hostnames exactly, without considering whether two hosts are part of +the same domain. Likewise, a config entry for `http://example.com` would not +match: Git compares the protocols exactly. + + +CONFIGURATION OPTIONS +--------------------- + +Options for a credential context can be configured either in +`credential.*` (which applies to all credentials), or +`credential.<url>.*`, where <url> matches the context as described +above. + +The following options are available in either location: + +helper:: + + The name of an external credential helper, and any associated options. + If the helper name is not an absolute path, then the string `git + credential-` is prepended. The resulting string is executed by the + shell (so, for example, setting this to `foo --option=bar` will execute + `git credential-foo --option=bar` via the shell. See the manual of + specific helpers for examples of their use. + +username:: + + A default username, if one is not provided in the URL. + +useHttpPath:: + + By default, Git does not consider the "path" component of an http URL + to be worth matching via external helpers. This means that a credential + stored for `https://example.com/foo.git` will also be used for + `https://example.com/bar.git`. If you do want to distinguish these + cases, set this option to `true`. + + +CUSTOM HELPERS +-------------- + +You can write your own custom helpers to interface with any system in +which you keep credentials. See the documentation for Git's +link:technical/api-credentials.html[credentials API] for details. + +GIT +--- +Part of the linkgit:git[1] suite diff --git a/Documentation/gitcvs-migration.txt b/Documentation/gitcvs-migration.txt new file mode 100644 index 0000000..b06e852 --- /dev/null +++ b/Documentation/gitcvs-migration.txt @@ -0,0 +1,202 @@ +gitcvs-migration(7) +=================== + +NAME +---- +gitcvs-migration - Git for CVS users + +SYNOPSIS +-------- +[verse] +'git cvsimport' * + +DESCRIPTION +----------- + +Git differs from CVS in that every working tree contains a repository with +a full copy of the project history, and no repository is inherently more +important than any other. However, you can emulate the CVS model by +designating a single shared repository which people can synchronize with; +this document explains how to do that. + +Some basic familiarity with Git is required. Having gone through +linkgit:gittutorial[7] and +linkgit:gitglossary[7] should be sufficient. + +Developing against a shared repository +-------------------------------------- + +Suppose a shared repository is set up in /pub/repo.git on the host +foo.com. Then as an individual committer you can clone the shared +repository over ssh with: + +------------------------------------------------ +$ git clone foo.com:/pub/repo.git/ my-project +$ cd my-project +------------------------------------------------ + +and hack away. The equivalent of 'cvs update' is + +------------------------------------------------ +$ git pull origin +------------------------------------------------ + +which merges in any work that others might have done since the clone +operation. If there are uncommitted changes in your working tree, commit +them first before running git pull. + +[NOTE] +================================ +The 'pull' command knows where to get updates from because of certain +configuration variables that were set by the first 'git clone' +command; see `git config -l` and the linkgit:git-config[1] man +page for details. +================================ + +You can update the shared repository with your changes by first committing +your changes, and then using the 'git push' command: + +------------------------------------------------ +$ git push origin master +------------------------------------------------ + +to "push" those commits to the shared repository. If someone else has +updated the repository more recently, 'git push', like 'cvs commit', will +complain, in which case you must pull any changes before attempting the +push again. + +In the 'git push' command above we specify the name of the remote branch +to update (`master`). If we leave that out, 'git push' tries to update +any branches in the remote repository that have the same name as a branch +in the local repository. So the last 'push' can be done with either of: + +------------ +$ git push origin +$ git push foo.com:/pub/project.git/ +------------ + +as long as the shared repository does not have any branches +other than `master`. + +Setting Up a Shared Repository +------------------------------ + +We assume you have already created a Git repository for your project, +possibly created from scratch or from a tarball (see +linkgit:gittutorial[7]), or imported from an already existing CVS +repository (see the next section). + +Assume your existing repo is at /home/alice/myproject. Create a new "bare" +repository (a repository without a working tree) and fetch your project into +it: + +------------------------------------------------ +$ mkdir /pub/my-repo.git +$ cd /pub/my-repo.git +$ git --bare init --shared +$ git --bare fetch /home/alice/myproject master:master +------------------------------------------------ + +Next, give every team member read/write access to this repository. One +easy way to do this is to give all the team members ssh access to the +machine where the repository is hosted. If you don't want to give them a +full shell on the machine, there is a restricted shell which only allows +users to do Git pushes and pulls; see linkgit:git-shell[1]. + +Put all the committers in the same group, and make the repository +writable by that group: + +------------------------------------------------ +$ chgrp -R $group /pub/my-repo.git +------------------------------------------------ + +Make sure committers have a umask of at most 027, so that the directories +they create are writable and searchable by other group members. + +Importing a CVS archive +----------------------- + +First, install version 2.1 or higher of cvsps from +http://www.cobite.com/cvsps/[http://www.cobite.com/cvsps/] and make +sure it is in your path. Then cd to a checked out CVS working directory +of the project you are interested in and run linkgit:git-cvsimport[1]: + +------------------------------------------- +$ git cvsimport -C <destination> <module> +------------------------------------------- + +This puts a Git archive of the named CVS module in the directory +<destination>, which will be created if necessary. + +The import checks out from CVS every revision of every file. Reportedly +cvsimport can average some twenty revisions per second, so for a +medium-sized project this should not take more than a couple of minutes. +Larger projects or remote repositories may take longer. + +The main trunk is stored in the Git branch named `origin`, and additional +CVS branches are stored in Git branches with the same names. The most +recent version of the main trunk is also left checked out on the `master` +branch, so you can start adding your own changes right away. + +The import is incremental, so if you call it again next month it will +fetch any CVS updates that have been made in the meantime. For this to +work, you must not modify the imported branches; instead, create new +branches for your own changes, and merge in the imported branches as +necessary. + +If you want a shared repository, you will need to make a bare clone +of the imported directory, as described above. Then treat the imported +directory as another development clone for purposes of merging +incremental imports. + +Advanced Shared Repository Management +------------------------------------- + +Git allows you to specify scripts called "hooks" to be run at certain +points. You can use these, for example, to send all commits to the shared +repository to a mailing list. See linkgit:githooks[5]. + +You can enforce finer grained permissions using update hooks. See +link:howto/update-hook-example.html[Controlling access to branches using +update hooks]. + +Providing CVS Access to a Git Repository +---------------------------------------- + +It is also possible to provide true CVS access to a Git repository, so +that developers can still use CVS; see linkgit:git-cvsserver[1] for +details. + +Alternative Development Models +------------------------------ + +CVS users are accustomed to giving a group of developers commit access to +a common repository. As we've seen, this is also possible with Git. +However, the distributed nature of Git allows other development models, +and you may want to first consider whether one of them might be a better +fit for your project. + +For example, you can choose a single person to maintain the project's +primary public repository. Other developers then clone this repository +and each work in their own clone. When they have a series of changes that +they're happy with, they ask the maintainer to pull from the branch +containing the changes. The maintainer reviews their changes and pulls +them into the primary repository, which other developers pull from as +necessary to stay coordinated. The Linux kernel and other projects use +variants of this model. + +With a small group, developers may just pull changes from each other's +repositories without the need for a central maintainer. + +SEE ALSO +-------- +linkgit:gittutorial[7], +linkgit:gittutorial-2[7], +linkgit:gitcore-tutorial[7], +linkgit:gitglossary[7], +linkgit:giteveryday[7], +link:user-manual.html[The Git User's Manual] + +GIT +--- +Part of the linkgit:git[1] suite. diff --git a/Documentation/gitdiffcore.txt b/Documentation/gitdiffcore.txt new file mode 100644 index 0000000..c579593 --- /dev/null +++ b/Documentation/gitdiffcore.txt @@ -0,0 +1,291 @@ +gitdiffcore(7) +============== + +NAME +---- +gitdiffcore - Tweaking diff output + +SYNOPSIS +-------- +[verse] +'git diff' * + +DESCRIPTION +----------- + +The diff commands 'git diff-index', 'git diff-files', and 'git diff-tree' +can be told to manipulate differences they find in +unconventional ways before showing 'diff' output. The manipulation +is collectively called "diffcore transformation". This short note +describes what they are and how to use them to produce 'diff' output +that is easier to understand than the conventional kind. + + +The chain of operation +---------------------- + +The 'git diff-{asterisk}' family works by first comparing two sets of +files: + + - 'git diff-index' compares contents of a "tree" object and the + working directory (when '--cached' flag is not used) or a + "tree" object and the index file (when '--cached' flag is + used); + + - 'git diff-files' compares contents of the index file and the + working directory; + + - 'git diff-tree' compares contents of two "tree" objects; + +In all of these cases, the commands themselves first optionally limit +the two sets of files by any pathspecs given on their command-lines, +and compare corresponding paths in the two resulting sets of files. + +The pathspecs are used to limit the world diff operates in. They remove +the filepairs outside the specified sets of pathnames. E.g. If the +input set of filepairs included: + +------------------------------------------------ +:100644 100644 bcd1234... 0123456... M junkfile +------------------------------------------------ + +but the command invocation was `git diff-files myfile`, then the +junkfile entry would be removed from the list because only "myfile" +is under consideration. + +The result of comparison is passed from these commands to what is +internally called "diffcore", in a format similar to what is output +when the -p option is not used. E.g. + +------------------------------------------------ +in-place edit :100644 100644 bcd1234... 0123456... M file0 +create :000000 100644 0000000... 1234567... A file4 +delete :100644 000000 1234567... 0000000... D file5 +unmerged :000000 000000 0000000... 0000000... U file6 +------------------------------------------------ + +The diffcore mechanism is fed a list of such comparison results +(each of which is called "filepair", although at this point each +of them talks about a single file), and transforms such a list +into another list. There are currently 5 such transformations: + +- diffcore-break +- diffcore-rename +- diffcore-merge-broken +- diffcore-pickaxe +- diffcore-order + +These are applied in sequence. The set of filepairs 'git diff-{asterisk}' +commands find are used as the input to diffcore-break, and +the output from diffcore-break is used as the input to the +next transformation. The final result is then passed to the +output routine and generates either diff-raw format (see Output +format sections of the manual for 'git diff-{asterisk}' commands) or +diff-patch format. + + +diffcore-break: For Splitting Up "Complete Rewrites" +---------------------------------------------------- + +The second transformation in the chain is diffcore-break, and is +controlled by the -B option to the 'git diff-{asterisk}' commands. This is +used to detect a filepair that represents "complete rewrite" and +break such filepair into two filepairs that represent delete and +create. E.g. If the input contained this filepair: + +------------------------------------------------ +:100644 100644 bcd1234... 0123456... M file0 +------------------------------------------------ + +and if it detects that the file "file0" is completely rewritten, +it changes it to: + +------------------------------------------------ +:100644 000000 bcd1234... 0000000... D file0 +:000000 100644 0000000... 0123456... A file0 +------------------------------------------------ + +For the purpose of breaking a filepair, diffcore-break examines +the extent of changes between the contents of the files before +and after modification (i.e. the contents that have "bcd1234..." +and "0123456..." as their SHA-1 content ID, in the above +example). The amount of deletion of original contents and +insertion of new material are added together, and if it exceeds +the "break score", the filepair is broken into two. The break +score defaults to 50% of the size of the smaller of the original +and the result (i.e. if the edit shrinks the file, the size of +the result is used; if the edit lengthens the file, the size of +the original is used), and can be customized by giving a number +after "-B" option (e.g. "-B75" to tell it to use 75%). + + +diffcore-rename: For Detection Renames and Copies +------------------------------------------------- + +This transformation is used to detect renames and copies, and is +controlled by the -M option (to detect renames) and the -C option +(to detect copies as well) to the 'git diff-{asterisk}' commands. If the +input contained these filepairs: + +------------------------------------------------ +:100644 000000 0123456... 0000000... D fileX +:000000 100644 0000000... 0123456... A file0 +------------------------------------------------ + +and the contents of the deleted file fileX is similar enough to +the contents of the created file file0, then rename detection +merges these filepairs and creates: + +------------------------------------------------ +:100644 100644 0123456... 0123456... R100 fileX file0 +------------------------------------------------ + +When the "-C" option is used, the original contents of modified files, +and deleted files (and also unmodified files, if the +"--find-copies-harder" option is used) are considered as candidates +of the source files in rename/copy operation. If the input were like +these filepairs, that talk about a modified file fileY and a newly +created file file0: + +------------------------------------------------ +:100644 100644 0123456... 1234567... M fileY +:000000 100644 0000000... bcd3456... A file0 +------------------------------------------------ + +the original contents of fileY and the resulting contents of +file0 are compared, and if they are similar enough, they are +changed to: + +------------------------------------------------ +:100644 100644 0123456... 1234567... M fileY +:100644 100644 0123456... bcd3456... C100 fileY file0 +------------------------------------------------ + +In both rename and copy detection, the same "extent of changes" +algorithm used in diffcore-break is used to determine if two +files are "similar enough", and can be customized to use +a similarity score different from the default of 50% by giving a +number after the "-M" or "-C" option (e.g. "-M8" to tell it to use +8/10 = 80%). + +Note. When the "-C" option is used with `--find-copies-harder` +option, 'git diff-{asterisk}' commands feed unmodified filepairs to +diffcore mechanism as well as modified ones. This lets the copy +detector consider unmodified files as copy source candidates at +the expense of making it slower. Without `--find-copies-harder`, +'git diff-{asterisk}' commands can detect copies only if the file that was +copied happened to have been modified in the same changeset. + + +diffcore-merge-broken: For Putting "Complete Rewrites" Back Together +-------------------------------------------------------------------- + +This transformation is used to merge filepairs broken by +diffcore-break, and not transformed into rename/copy by +diffcore-rename, back into a single modification. This always +runs when diffcore-break is used. + +For the purpose of merging broken filepairs back, it uses a +different "extent of changes" computation from the ones used by +diffcore-break and diffcore-rename. It counts only the deletion +from the original, and does not count insertion. If you removed +only 10 lines from a 100-line document, even if you added 910 +new lines to make a new 1000-line document, you did not do a +complete rewrite. diffcore-break breaks such a case in order to +help diffcore-rename to consider such filepairs as candidate of +rename/copy detection, but if filepairs broken that way were not +matched with other filepairs to create rename/copy, then this +transformation merges them back into the original +"modification". + +The "extent of changes" parameter can be tweaked from the +default 80% (that is, unless more than 80% of the original +material is deleted, the broken pairs are merged back into a +single modification) by giving a second number to -B option, +like these: + +* -B50/60 (give 50% "break score" to diffcore-break, use 60% + for diffcore-merge-broken). + +* -B/60 (the same as above, since diffcore-break defaults to 50%). + +Note that earlier implementation left a broken pair as a separate +creation and deletion patches. This was an unnecessary hack and +the latest implementation always merges all the broken pairs +back into modifications, but the resulting patch output is +formatted differently for easier review in case of such +a complete rewrite by showing the entire contents of old version +prefixed with '-', followed by the entire contents of new +version prefixed with '+'. + + +diffcore-pickaxe: For Detecting Addition/Deletion of Specified String +--------------------------------------------------------------------- + +This transformation limits the set of filepairs to those that change +specified strings between the preimage and the postimage in a certain +way. -S<block of text> and -G<regular expression> options are used to +specify different ways these strings are sought. + +"-S<block of text>" detects filepairs whose preimage and postimage +have different number of occurrences of the specified block of text. +By definition, it will not detect in-file moves. Also, when a +changeset moves a file wholesale without affecting the interesting +string, diffcore-rename kicks in as usual, and `-S` omits the filepair +(since the number of occurrences of that string didn't change in that +rename-detected filepair). When used with `--pickaxe-regex`, treat +the <block of text> as an extended POSIX regular expression to match, +instead of a literal string. + +"-G<regular expression>" (mnemonic: grep) detects filepairs whose +textual diff has an added or a deleted line that matches the given +regular expression. This means that it will detect in-file (or what +rename-detection considers the same file) moves, which is noise. The +implementation runs diff twice and greps, and this can be quite +expensive. + +When `-S` or `-G` are used without `--pickaxe-all`, only filepairs +that match their respective criterion are kept in the output. When +`--pickaxe-all` is used, if even one filepair matches their respective +criterion in a changeset, the entire changeset is kept. This behavior +is designed to make reviewing changes in the context of the whole +changeset easier. + +diffcore-order: For Sorting the Output Based on Filenames +--------------------------------------------------------- + +This is used to reorder the filepairs according to the user's +(or project's) taste, and is controlled by the -O option to the +'git diff-{asterisk}' commands. + +This takes a text file each of whose lines is a shell glob +pattern. Filepairs that match a glob pattern on an earlier line +in the file are output before ones that match a later line, and +filepairs that do not match any glob pattern are output last. + +As an example, a typical orderfile for the core Git probably +would look like this: + +------------------------------------------------ +README +Makefile +Documentation +*.h +*.c +t +------------------------------------------------ + +SEE ALSO +-------- +linkgit:git-diff[1], +linkgit:git-diff-files[1], +linkgit:git-diff-index[1], +linkgit:git-diff-tree[1], +linkgit:git-format-patch[1], +linkgit:git-log[1], +linkgit:gitglossary[7], +link:user-manual.html[The Git User's Manual] + +GIT +--- +Part of the linkgit:git[1] suite. diff --git a/Documentation/giteveryday.txt b/Documentation/giteveryday.txt new file mode 100644 index 0000000..35473ad --- /dev/null +++ b/Documentation/giteveryday.txt @@ -0,0 +1,455 @@ +giteveryday(7) +============== + +NAME +---- +giteveryday - A useful minimum set of commands for Everyday Git + +SYNOPSIS +-------- + +Everyday Git With 20 Commands Or So + +DESCRIPTION +----------- + +Git users can broadly be grouped into four categories for the purposes of +describing here a small set of useful command for everyday Git. + +* <<STANDALONE,Individual Developer (Standalone)>> commands are essential + for anybody who makes a commit, even for somebody who works alone. + +* If you work with other people, you will need commands listed in + the <<PARTICIPANT,Individual Developer (Participant)>> section as well. + +* People who play the <<INTEGRATOR,Integrator>> role need to learn some + more commands in addition to the above. + +* <<ADMINISTRATION,Repository Administration>> commands are for system + administrators who are responsible for the care and feeding + of Git repositories. + + +Individual Developer (Standalone)[[STANDALONE]] +----------------------------------------------- + +A standalone individual developer does not exchange patches with +other people, and works alone in a single repository, using the +following commands. + + * linkgit:git-init[1] to create a new repository. + + * linkgit:git-log[1] to see what happened. + + * linkgit:git-checkout[1] and linkgit:git-branch[1] to switch + branches. + + * linkgit:git-add[1] to manage the index file. + + * linkgit:git-diff[1] and linkgit:git-status[1] to see what + you are in the middle of doing. + + * linkgit:git-commit[1] to advance the current branch. + + * linkgit:git-reset[1] and linkgit:git-checkout[1] (with + pathname parameters) to undo changes. + + * linkgit:git-merge[1] to merge between local branches. + + * linkgit:git-rebase[1] to maintain topic branches. + + * linkgit:git-tag[1] to mark a known point. + +Examples +~~~~~~~~ + +Use a tarball as a starting point for a new repository.:: ++ +------------ +$ tar zxf frotz.tar.gz +$ cd frotz +$ git init +$ git add . <1> +$ git commit -m "import of frotz source tree." +$ git tag v2.43 <2> +------------ ++ +<1> add everything under the current directory. +<2> make a lightweight, unannotated tag. + +Create a topic branch and develop.:: ++ +------------ +$ git checkout -b alsa-audio <1> +$ edit/compile/test +$ git checkout -- curses/ux_audio_oss.c <2> +$ git add curses/ux_audio_alsa.c <3> +$ edit/compile/test +$ git diff HEAD <4> +$ git commit -a -s <5> +$ edit/compile/test +$ git diff HEAD^ <6> +$ git commit -a --amend <7> +$ git checkout master <8> +$ git merge alsa-audio <9> +$ git log --since='3 days ago' <10> +$ git log v2.43.. curses/ <11> +------------ ++ +<1> create a new topic branch. +<2> revert your botched changes in `curses/ux_audio_oss.c`. +<3> you need to tell Git if you added a new file; removal and +modification will be caught if you do `git commit -a` later. +<4> to see what changes you are committing. +<5> commit everything, as you have tested, with your sign-off. +<6> look at all your changes including the previous commit. +<7> amend the previous commit, adding all your new changes, +using your original message. +<8> switch to the master branch. +<9> merge a topic branch into your master branch. +<10> review commit logs; other forms to limit output can be +combined and include `-10` (to show up to 10 commits), +`--until=2005-12-10`, etc. +<11> view only the changes that touch what's in `curses/` +directory, since `v2.43` tag. + + +Individual Developer (Participant)[[PARTICIPANT]] +------------------------------------------------- + +A developer working as a participant in a group project needs to +learn how to communicate with others, and uses these commands in +addition to the ones needed by a standalone developer. + + * linkgit:git-clone[1] from the upstream to prime your local + repository. + + * linkgit:git-pull[1] and linkgit:git-fetch[1] from "origin" + to keep up-to-date with the upstream. + + * linkgit:git-push[1] to shared repository, if you adopt CVS + style shared repository workflow. + + * linkgit:git-format-patch[1] to prepare e-mail submission, if + you adopt Linux kernel-style public forum workflow. + + * linkgit:git-send-email[1] to send your e-mail submission without + corruption by your MUA. + + * linkgit:git-request-pull[1] to create a summary of changes + for your upstream to pull. + + +Examples +~~~~~~~~ + +Clone the upstream and work on it. Feed changes to upstream.:: ++ +------------ +$ git clone git://git.kernel.org/pub/scm/.../torvalds/linux-2.6 my2.6 +$ cd my2.6 +$ git checkout -b mine master <1> +$ edit/compile/test; git commit -a -s <2> +$ git format-patch master <3> +$ git send-email --to="person <email@example.com>" 00*.patch <4> +$ git checkout master <5> +$ git pull <6> +$ git log -p ORIG_HEAD.. arch/i386 include/asm-i386 <7> +$ git ls-remote --heads http://git.kernel.org/.../jgarzik/libata-dev.git <8> +$ git pull git://git.kernel.org/pub/.../jgarzik/libata-dev.git ALL <9> +$ git reset --hard ORIG_HEAD <10> +$ git gc <11> +------------ ++ +<1> checkout a new branch `mine` from master. +<2> repeat as needed. +<3> extract patches from your branch, relative to master, +<4> and email them. +<5> return to `master`, ready to see what's new +<6> `git pull` fetches from `origin` by default and merges into the +current branch. +<7> immediately after pulling, look at the changes done upstream +since last time we checked, only in the +area we are interested in. +<8> check the branch names in an external repository (if not known). +<9> fetch from a specific branch `ALL` from a specific repository +and merge it. +<10> revert the pull. +<11> garbage collect leftover objects from reverted pull. + + +Push into another repository.:: ++ +------------ +satellite$ git clone mothership:frotz frotz <1> +satellite$ cd frotz +satellite$ git config --get-regexp '^(remote|branch)\.' <2> +remote.origin.url mothership:frotz +remote.origin.fetch refs/heads/*:refs/remotes/origin/* +branch.master.remote origin +branch.master.merge refs/heads/master +satellite$ git config remote.origin.push \ + +refs/heads/*:refs/remotes/satellite/* <3> +satellite$ edit/compile/test/commit +satellite$ git push origin <4> + +mothership$ cd frotz +mothership$ git checkout master +mothership$ git merge satellite/master <5> +------------ ++ +<1> mothership machine has a frotz repository under your home +directory; clone from it to start a repository on the satellite +machine. +<2> clone sets these configuration variables by default. +It arranges `git pull` to fetch and store the branches of mothership +machine to local `remotes/origin/*` remote-tracking branches. +<3> arrange `git push` to push all local branches to +their corresponding branch of the mothership machine. +<4> push will stash all our work away on `remotes/satellite/*` +remote-tracking branches on the mothership machine. You could use this +as a back-up method. Likewise, you can pretend that mothership +"fetched" from you (useful when access is one sided). +<5> on mothership machine, merge the work done on the satellite +machine into the master branch. + +Branch off of a specific tag.:: ++ +------------ +$ git checkout -b private2.6.14 v2.6.14 <1> +$ edit/compile/test; git commit -a +$ git checkout master +$ git cherry-pick v2.6.14..private2.6.14 <2> +------------ ++ +<1> create a private branch based on a well known (but somewhat behind) +tag. +<2> forward port all changes in `private2.6.14` branch to `master` branch +without a formal "merging". Or longhand + +`git format-patch -k -m --stdout v2.6.14..private2.6.14 | + git am -3 -k` + +An alternate participant submission mechanism is using the +`git request-pull` or pull-request mechanisms (e.g as used on +GitHub (www.github.com) to notify your upstream of your +contribution. + +Integrator[[INTEGRATOR]] +------------------------ + +A fairly central person acting as the integrator in a group +project receives changes made by others, reviews and integrates +them and publishes the result for others to use, using these +commands in addition to the ones needed by participants. + +This section can also be used by those who respond to `git +request-pull` or pull-request on GitHub (www.github.com) to +integrate the work of others into their history. An sub-area +lieutenant for a repository will act both as a participant and +as an integrator. + + + * linkgit:git-am[1] to apply patches e-mailed in from your + contributors. + + * linkgit:git-pull[1] to merge from your trusted lieutenants. + + * linkgit:git-format-patch[1] to prepare and send suggested + alternative to contributors. + + * linkgit:git-revert[1] to undo botched commits. + + * linkgit:git-push[1] to publish the bleeding edge. + + +Examples +~~~~~~~~ + +A typical integrator's Git day.:: ++ +------------ +$ git status <1> +$ git branch --no-merged master <2> +$ mailx <3> +& s 2 3 4 5 ./+to-apply +& s 7 8 ./+hold-linus +& q +$ git checkout -b topic/one master +$ git am -3 -i -s ./+to-apply <4> +$ compile/test +$ git checkout -b hold/linus && git am -3 -i -s ./+hold-linus <5> +$ git checkout topic/one && git rebase master <6> +$ git checkout pu && git reset --hard next <7> +$ git merge topic/one topic/two && git merge hold/linus <8> +$ git checkout maint +$ git cherry-pick master~4 <9> +$ compile/test +$ git tag -s -m "GIT 0.99.9x" v0.99.9x <10> +$ git fetch ko && for branch in master maint next pu <11> + do + git show-branch ko/$branch $branch <12> + done +$ git push --follow-tags ko <13> +------------ ++ +<1> see what you were in the middle of doing, if anything. +<2> see which branches haven't been merged into `master` yet. +Likewise for any other integration branches e.g. `maint`, `next` +and `pu` (potential updates). +<3> read mails, save ones that are applicable, and save others +that are not quite ready (other mail readers are available). +<4> apply them, interactively, with your sign-offs. +<5> create topic branch as needed and apply, again with sign-offs. +<6> rebase internal topic branch that has not been merged to the +master or exposed as a part of a stable branch. +<7> restart `pu` every time from the next. +<8> and bundle topic branches still cooking. +<9> backport a critical fix. +<10> create a signed tag. +<11> make sure master was not accidentally rewound beyond that +already pushed out. `ko` shorthand points at the Git maintainer's +repository at kernel.org, and looks like this: ++ +------------ +(in .git/config) +[remote "ko"] + url = kernel.org:/pub/scm/git/git.git + fetch = refs/heads/*:refs/remotes/ko/* + push = refs/heads/master + push = refs/heads/next + push = +refs/heads/pu + push = refs/heads/maint +------------ ++ +<12> In the output from `git show-branch`, `master` should have +everything `ko/master` has, and `next` should have +everything `ko/next` has, etc. +<13> push out the bleeding edge, together with new tags that point +into the pushed history. + + +Repository Administration[[ADMINISTRATION]] +------------------------------------------- + +A repository administrator uses the following tools to set up +and maintain access to the repository by developers. + + * linkgit:git-daemon[1] to allow anonymous download from + repository. + + * linkgit:git-shell[1] can be used as a 'restricted login shell' + for shared central repository users. + + * linkgit:git-http-backend[1] provides a server side implementation + of Git-over-HTTP ("Smart http") allowing both fetch and push services. + + * linkgit:gitweb[1] provides a web front-end to Git repositories, + which can be set-up using the linkgit:git-instaweb[1] script. + +link:howto/update-hook-example.html[update hook howto] has a good +example of managing a shared central repository. + +In addition there are a number of other widely deployed hosting, browsing +and reviewing solutions such as: + + * gitolite, gerrit code review, cgit and others. + +Examples +~~~~~~~~ +We assume the following in /etc/services:: ++ +------------ +$ grep 9418 /etc/services +git 9418/tcp # Git Version Control System +------------ + +Run git-daemon to serve /pub/scm from inetd.:: ++ +------------ +$ grep git /etc/inetd.conf +git stream tcp nowait nobody \ + /usr/bin/git-daemon git-daemon --inetd --export-all /pub/scm +------------ ++ +The actual configuration line should be on one line. + +Run git-daemon to serve /pub/scm from xinetd.:: ++ +------------ +$ cat /etc/xinetd.d/git-daemon +# default: off +# description: The Git server offers access to Git repositories +service git +{ + disable = no + type = UNLISTED + port = 9418 + socket_type = stream + wait = no + user = nobody + server = /usr/bin/git-daemon + server_args = --inetd --export-all --base-path=/pub/scm + log_on_failure += USERID +} +------------ ++ +Check your xinetd(8) documentation and setup, this is from a Fedora system. +Others might be different. + +Give push/pull only access to developers using git-over-ssh.:: + +e.g. those using: +`$ git push/pull ssh://host.xz/pub/scm/project` ++ +------------ +$ grep git /etc/passwd <1> +alice:x:1000:1000::/home/alice:/usr/bin/git-shell +bob:x:1001:1001::/home/bob:/usr/bin/git-shell +cindy:x:1002:1002::/home/cindy:/usr/bin/git-shell +david:x:1003:1003::/home/david:/usr/bin/git-shell +$ grep git /etc/shells <2> +/usr/bin/git-shell +------------ ++ +<1> log-in shell is set to /usr/bin/git-shell, which does not +allow anything but `git push` and `git pull`. The users require +ssh access to the machine. +<2> in many distributions /etc/shells needs to list what is used +as the login shell. + +CVS-style shared repository.:: ++ +------------ +$ grep git /etc/group <1> +git:x:9418:alice,bob,cindy,david +$ cd /home/devo.git +$ ls -l <2> + lrwxrwxrwx 1 david git 17 Dec 4 22:40 HEAD -> refs/heads/master + drwxrwsr-x 2 david git 4096 Dec 4 22:40 branches + -rw-rw-r-- 1 david git 84 Dec 4 22:40 config + -rw-rw-r-- 1 david git 58 Dec 4 22:40 description + drwxrwsr-x 2 david git 4096 Dec 4 22:40 hooks + -rw-rw-r-- 1 david git 37504 Dec 4 22:40 index + drwxrwsr-x 2 david git 4096 Dec 4 22:40 info + drwxrwsr-x 4 david git 4096 Dec 4 22:40 objects + drwxrwsr-x 4 david git 4096 Nov 7 14:58 refs + drwxrwsr-x 2 david git 4096 Dec 4 22:40 remotes +$ ls -l hooks/update <3> + -r-xr-xr-x 1 david git 3536 Dec 4 22:40 update +$ cat info/allowed-users <4> +refs/heads/master alice\|cindy +refs/heads/doc-update bob +refs/tags/v[0-9]* david +------------ ++ +<1> place the developers into the same git group. +<2> and make the shared repository writable by the group. +<3> use update-hook example by Carl from Documentation/howto/ +for branch policy control. +<4> alice and cindy can push into master, only bob can push into doc-update. +david is the release manager and is the only person who can +create and push version tags. + +GIT +--- +Part of the linkgit:git[1] suite diff --git a/Documentation/gitglossary.txt b/Documentation/gitglossary.txt new file mode 100644 index 0000000..212e254 --- /dev/null +++ b/Documentation/gitglossary.txt @@ -0,0 +1,27 @@ +gitglossary(7) +============== + +NAME +---- +gitglossary - A Git Glossary + +SYNOPSIS +-------- +* + +DESCRIPTION +----------- + +include::glossary-content.txt[] + +SEE ALSO +-------- +linkgit:gittutorial[7], +linkgit:gittutorial-2[7], +linkgit:gitcvs-migration[7], +linkgit:giteveryday[7], +link:user-manual.html[The Git User's Manual] + +GIT +--- +Part of the linkgit:git[1] suite. diff --git a/Documentation/githooks.txt b/Documentation/githooks.txt new file mode 100644 index 0000000..a2f59b1 --- /dev/null +++ b/Documentation/githooks.txt @@ -0,0 +1,417 @@ +githooks(5) +=========== + +NAME +---- +githooks - Hooks used by Git + +SYNOPSIS +-------- +$GIT_DIR/hooks/* + + +DESCRIPTION +----------- + +Hooks are little scripts you can place in `$GIT_DIR/hooks` +directory to trigger action at certain points. When +'git init' is run, a handful of example hooks are copied into the +`hooks` directory of the new repository, but by default they are +all disabled. To enable a hook, rename it by removing its `.sample` +suffix. + +NOTE: It is also a requirement for a given hook to be executable. +However - in a freshly initialized repository - the `.sample` files are +executable by default. + +This document describes the currently defined hooks. + +HOOKS +----- + +applypatch-msg +~~~~~~~~~~~~~~ + +This hook is invoked by 'git am' script. It takes a single +parameter, the name of the file that holds the proposed commit +log message. Exiting with non-zero status causes +'git am' to abort before applying the patch. + +The hook is allowed to edit the message file in place, and can +be used to normalize the message into some project standard +format (if the project has one). It can also be used to refuse +the commit after inspecting the message file. + +The default 'applypatch-msg' hook, when enabled, runs the +'commit-msg' hook, if the latter is enabled. + +pre-applypatch +~~~~~~~~~~~~~~ + +This hook is invoked by 'git am'. It takes no parameter, and is +invoked after the patch is applied, but before a commit is made. + +If it exits with non-zero status, then the working tree will not be +committed after applying the patch. + +It can be used to inspect the current working tree and refuse to +make a commit if it does not pass certain test. + +The default 'pre-applypatch' hook, when enabled, runs the +'pre-commit' hook, if the latter is enabled. + +post-applypatch +~~~~~~~~~~~~~~~ + +This hook is invoked by 'git am'. It takes no parameter, +and is invoked after the patch is applied and a commit is made. + +This hook is meant primarily for notification, and cannot affect +the outcome of 'git am'. + +pre-commit +~~~~~~~~~~ + +This hook is invoked by 'git commit', and can be bypassed +with `--no-verify` option. It takes no parameter, and is +invoked before obtaining the proposed commit log message and +making a commit. Exiting with non-zero status from this script +causes the 'git commit' to abort. + +The default 'pre-commit' hook, when enabled, catches introduction +of lines with trailing whitespaces and aborts the commit when +such a line is found. + +All the 'git commit' hooks are invoked with the environment +variable `GIT_EDITOR=:` if the command will not bring up an editor +to modify the commit message. + +prepare-commit-msg +~~~~~~~~~~~~~~~~~~ + +This hook is invoked by 'git commit' right after preparing the +default log message, and before the editor is started. + +It takes one to three parameters. The first is the name of the file +that contains the commit log message. The second is the source of the commit +message, and can be: `message` (if a `-m` or `-F` option was +given); `template` (if a `-t` option was given or the +configuration option `commit.template` is set); `merge` (if the +commit is a merge or a `.git/MERGE_MSG` file exists); `squash` +(if a `.git/SQUASH_MSG` file exists); or `commit`, followed by +a commit SHA-1 (if a `-c`, `-C` or `--amend` option was given). + +If the exit status is non-zero, 'git commit' will abort. + +The purpose of the hook is to edit the message file in place, and +it is not suppressed by the `--no-verify` option. A non-zero exit +means a failure of the hook and aborts the commit. It should not +be used as replacement for pre-commit hook. + +The sample `prepare-commit-msg` hook that comes with Git comments +out the `Conflicts:` part of a merge's commit message. + +commit-msg +~~~~~~~~~~ + +This hook is invoked by 'git commit', and can be bypassed +with `--no-verify` option. It takes a single parameter, the +name of the file that holds the proposed commit log message. +Exiting with non-zero status causes the 'git commit' to +abort. + +The hook is allowed to edit the message file in place, and can +be used to normalize the message into some project standard +format (if the project has one). It can also be used to refuse +the commit after inspecting the message file. + +The default 'commit-msg' hook, when enabled, detects duplicate +"Signed-off-by" lines, and aborts the commit if one is found. + +post-commit +~~~~~~~~~~~ + +This hook is invoked by 'git commit'. It takes no +parameter, and is invoked after a commit is made. + +This hook is meant primarily for notification, and cannot affect +the outcome of 'git commit'. + +pre-rebase +~~~~~~~~~~ + +This hook is called by 'git rebase' and can be used to prevent a +branch from getting rebased. The hook may be called with one or +two parameters. The first parameter is the upstream from which +the series was forked. The second parameter is the branch being +rebased, and is not set when rebasing the current branch. + +post-checkout +~~~~~~~~~~~~~ + +This hook is invoked when a 'git checkout' is run after having updated the +worktree. The hook is given three parameters: the ref of the previous HEAD, +the ref of the new HEAD (which may or may not have changed), and a flag +indicating whether the checkout was a branch checkout (changing branches, +flag=1) or a file checkout (retrieving a file from the index, flag=0). +This hook cannot affect the outcome of 'git checkout'. + +It is also run after 'git clone', unless the --no-checkout (-n) option is +used. The first parameter given to the hook is the null-ref, the second the +ref of the new HEAD and the flag is always 1. + +This hook can be used to perform repository validity checks, auto-display +differences from the previous HEAD if different, or set working dir metadata +properties. + +post-merge +~~~~~~~~~~ + +This hook is invoked by 'git merge', which happens when a 'git pull' +is done on a local repository. The hook takes a single parameter, a status +flag specifying whether or not the merge being done was a squash merge. +This hook cannot affect the outcome of 'git merge' and is not executed, +if the merge failed due to conflicts. + +This hook can be used in conjunction with a corresponding pre-commit hook to +save and restore any form of metadata associated with the working tree +(e.g.: permissions/ownership, ACLS, etc). See contrib/hooks/setgitperms.perl +for an example of how to do this. + +pre-push +~~~~~~~~ + +This hook is called by 'git push' and can be used to prevent a push from taking +place. The hook is called with two parameters which provide the name and +location of the destination remote, if a named remote is not being used both +values will be the same. + +Information about what is to be pushed is provided on the hook's standard +input with lines of the form: + + <local ref> SP <local sha1> SP <remote ref> SP <remote sha1> LF + +For instance, if the command +git push origin master:foreign+ were run the +hook would receive a line like the following: + + refs/heads/master 67890 refs/heads/foreign 12345 + +although the full, 40-character SHA-1s would be supplied. If the foreign ref +does not yet exist the `<remote SHA-1>` will be 40 `0`. If a ref is to be +deleted, the `<local ref>` will be supplied as `(delete)` and the `<local +SHA-1>` will be 40 `0`. If the local commit was specified by something other +than a name which could be expanded (such as `HEAD~`, or a SHA-1) it will be +supplied as it was originally given. + +If this hook exits with a non-zero status, 'git push' will abort without +pushing anything. Information about why the push is rejected may be sent +to the user by writing to standard error. + +[[pre-receive]] +pre-receive +~~~~~~~~~~~ + +This hook is invoked by 'git-receive-pack' on the remote repository, +which happens when a 'git push' is done on a local repository. +Just before starting to update refs on the remote repository, the +pre-receive hook is invoked. Its exit status determines the success +or failure of the update. + +This hook executes once for the receive operation. It takes no +arguments, but for each ref to be updated it receives on standard +input a line of the format: + + <old-value> SP <new-value> SP <ref-name> LF + +where `<old-value>` is the old object name stored in the ref, +`<new-value>` is the new object name to be stored in the ref and +`<ref-name>` is the full name of the ref. +When creating a new ref, `<old-value>` is 40 `0`. + +If the hook exits with non-zero status, none of the refs will be +updated. If the hook exits with zero, updating of individual refs can +still be prevented by the <<update,'update'>> hook. + +Both standard output and standard error output are forwarded to +'git send-pack' on the other end, so you can simply `echo` messages +for the user. + +[[update]] +update +~~~~~~ + +This hook is invoked by 'git-receive-pack' on the remote repository, +which happens when a 'git push' is done on a local repository. +Just before updating the ref on the remote repository, the update hook +is invoked. Its exit status determines the success or failure of +the ref update. + +The hook executes once for each ref to be updated, and takes +three parameters: + + - the name of the ref being updated, + - the old object name stored in the ref, + - and the new object name to be stored in the ref. + +A zero exit from the update hook allows the ref to be updated. +Exiting with a non-zero status prevents 'git-receive-pack' +from updating that ref. + +This hook can be used to prevent 'forced' update on certain refs by +making sure that the object name is a commit object that is a +descendant of the commit object named by the old object name. +That is, to enforce a "fast-forward only" policy. + +It could also be used to log the old..new status. However, it +does not know the entire set of branches, so it would end up +firing one e-mail per ref when used naively, though. The +<<post-receive,'post-receive'>> hook is more suited to that. + +Another use suggested on the mailing list is to use this hook to +implement access control which is finer grained than the one +based on filesystem group. + +Both standard output and standard error output are forwarded to +'git send-pack' on the other end, so you can simply `echo` messages +for the user. + +The default 'update' hook, when enabled--and with +`hooks.allowunannotated` config option unset or set to false--prevents +unannotated tags to be pushed. + +[[post-receive]] +post-receive +~~~~~~~~~~~~ + +This hook is invoked by 'git-receive-pack' on the remote repository, +which happens when a 'git push' is done on a local repository. +It executes on the remote repository once after all the refs have +been updated. + +This hook executes once for the receive operation. It takes no +arguments, but gets the same information as the +<<pre-receive,'pre-receive'>> +hook does on its standard input. + +This hook does not affect the outcome of 'git-receive-pack', as it +is called after the real work is done. + +This supersedes the <<post-update,'post-update'>> hook in that it gets +both old and new values of all the refs in addition to their +names. + +Both standard output and standard error output are forwarded to +'git send-pack' on the other end, so you can simply `echo` messages +for the user. + +The default 'post-receive' hook is empty, but there is +a sample script `post-receive-email` provided in the `contrib/hooks` +directory in Git distribution, which implements sending commit +emails. + +[[post-update]] +post-update +~~~~~~~~~~~ + +This hook is invoked by 'git-receive-pack' on the remote repository, +which happens when a 'git push' is done on a local repository. +It executes on the remote repository once after all the refs have +been updated. + +It takes a variable number of parameters, each of which is the +name of ref that was actually updated. + +This hook is meant primarily for notification, and cannot affect +the outcome of 'git-receive-pack'. + +The 'post-update' hook can tell what are the heads that were pushed, +but it does not know what their original and updated values are, +so it is a poor place to do log old..new. The +<<post-receive,'post-receive'>> hook does get both original and +updated values of the refs. You might consider it instead if you need +them. + +When enabled, the default 'post-update' hook runs +'git update-server-info' to keep the information used by dumb +transports (e.g., HTTP) up-to-date. If you are publishing +a Git repository that is accessible via HTTP, you should +probably enable this hook. + +Both standard output and standard error output are forwarded to +'git send-pack' on the other end, so you can simply `echo` messages +for the user. + +push-to-checkout +~~~~~~~~~~~~~~~~ + +This hook is invoked by 'git-receive-pack' on the remote repository, +which happens when a 'git push' is done on a local repository, when +the push tries to update the branch that is currently checked out +and the `receive.denyCurrentBranch` configuration variable is set to +`updateInstead`. Such a push by default is refused if the working +tree and the index of the remote repository has any difference from +the currently checked out commit; when both the working tree and the +index match the current commit, they are updated to match the newly +pushed tip of the branch. This hook is to be used to override the +default behaviour. + +The hook receives the commit with which the tip of the current +branch is going to be updated. It can exit with a non-zero status +to refuse the push (when it does so, it must not modify the index or +the working tree). Or it can make any necessary changes to the +working tree and to the index to bring them to the desired state +when the tip of the current branch is updated to the new commit, and +exit with a zero status. + +For example, the hook can simply run `git read-tree -u -m HEAD "$1"` +in order to emulate 'git fetch' that is run in the reverse direction +with `git push`, as the two-tree form of `read-tree -u -m` is +essentially the same as `git checkout` that switches branches while +keeping the local changes in the working tree that do not interfere +with the difference between the branches. + + +pre-auto-gc +~~~~~~~~~~~ + +This hook is invoked by 'git gc --auto'. It takes no parameter, and +exiting with non-zero status from this script causes the 'git gc --auto' +to abort. + +post-rewrite +~~~~~~~~~~~~ + +This hook is invoked by commands that rewrite commits (`git commit +--amend`, 'git-rebase'; currently 'git-filter-branch' does 'not' call +it!). Its first argument denotes the command it was invoked by: +currently one of `amend` or `rebase`. Further command-dependent +arguments may be passed in the future. + +The hook receives a list of the rewritten commits on stdin, in the +format + + <old-sha1> SP <new-sha1> [ SP <extra-info> ] LF + +The 'extra-info' is again command-dependent. If it is empty, the +preceding SP is also omitted. Currently, no commands pass any +'extra-info'. + +The hook always runs after the automatic note copying (see +"notes.rewrite.<command>" in linkgit:git-config[1]) has happened, and +thus has access to these notes. + +The following command-specific comments apply: + +rebase:: + For the 'squash' and 'fixup' operation, all commits that were + squashed are listed as being rewritten to the squashed commit. + This means that there will be several lines sharing the same + 'new-sha1'. ++ +The commits are guaranteed to be listed in the order that they were +processed by rebase. + + +GIT +--- +Part of the linkgit:git[1] suite diff --git a/Documentation/gitignore.txt b/Documentation/gitignore.txt new file mode 100644 index 0000000..473623d --- /dev/null +++ b/Documentation/gitignore.txt @@ -0,0 +1,208 @@ +gitignore(5) +============ + +NAME +---- +gitignore - Specifies intentionally untracked files to ignore + +SYNOPSIS +-------- +$HOME/.config/git/ignore, $GIT_DIR/info/exclude, .gitignore + +DESCRIPTION +----------- + +A `gitignore` file specifies intentionally untracked files that +Git should ignore. +Files already tracked by Git are not affected; see the NOTES +below for details. + +Each line in a `gitignore` file specifies a pattern. +When deciding whether to ignore a path, Git normally checks +`gitignore` patterns from multiple sources, with the following +order of precedence, from highest to lowest (within one level of +precedence, the last matching pattern decides the outcome): + + * Patterns read from the command line for those commands that support + them. + + * Patterns read from a `.gitignore` file in the same directory + as the path, or in any parent directory, with patterns in the + higher level files (up to the toplevel of the work tree) being overridden + by those in lower level files down to the directory containing the file. + These patterns match relative to the location of the + `.gitignore` file. A project normally includes such + `.gitignore` files in its repository, containing patterns for + files generated as part of the project build. + + * Patterns read from `$GIT_DIR/info/exclude`. + + * Patterns read from the file specified by the configuration + variable 'core.excludesFile'. + +Which file to place a pattern in depends on how the pattern is meant to +be used. + + * Patterns which should be version-controlled and distributed to + other repositories via clone (i.e., files that all developers will want + to ignore) should go into a `.gitignore` file. + + * Patterns which are + specific to a particular repository but which do not need to be shared + with other related repositories (e.g., auxiliary files that live inside + the repository but are specific to one user's workflow) should go into + the `$GIT_DIR/info/exclude` file. + + * Patterns which a user wants Git to + ignore in all situations (e.g., backup or temporary files generated by + the user's editor of choice) generally go into a file specified by + `core.excludesFile` in the user's `~/.gitconfig`. Its default value is + $XDG_CONFIG_HOME/git/ignore. If $XDG_CONFIG_HOME is either not set or + empty, $HOME/.config/git/ignore is used instead. + +The underlying Git plumbing tools, such as +'git ls-files' and 'git read-tree', read +`gitignore` patterns specified by command-line options, or from +files specified by command-line options. Higher-level Git +tools, such as 'git status' and 'git add', +use patterns from the sources specified above. + +PATTERN FORMAT +-------------- + + - A blank line matches no files, so it can serve as a separator + for readability. + + - A line starting with # serves as a comment. + Put a backslash ("`\`") in front of the first hash for patterns + that begin with a hash. + + - Trailing spaces are ignored unless they are quoted with backslash + ("`\`"). + + - An optional prefix "`!`" which negates the pattern; any + matching file excluded by a previous pattern will become + included again. It is not possible to re-include a file if a parent + directory of that file is excluded. Git doesn't list excluded + directories for performance reasons, so any patterns on contained + files have no effect, no matter where they are defined. + Put a backslash ("`\`") in front of the first "`!`" for patterns + that begin with a literal "`!`", for example, "`\!important!.txt`". + + - If the pattern ends with a slash, it is removed for the + purpose of the following description, but it would only find + a match with a directory. In other words, `foo/` will match a + directory `foo` and paths underneath it, but will not match a + regular file or a symbolic link `foo` (this is consistent + with the way how pathspec works in general in Git). + + - If the pattern does not contain a slash '/', Git treats it as + a shell glob pattern and checks for a match against the + pathname relative to the location of the `.gitignore` file + (relative to the toplevel of the work tree if not from a + `.gitignore` file). + + - Otherwise, Git treats the pattern as a shell glob suitable + for consumption by fnmatch(3) with the FNM_PATHNAME flag: + wildcards in the pattern will not match a / in the pathname. + For example, "Documentation/{asterisk}.html" matches + "Documentation/git.html" but not "Documentation/ppc/ppc.html" + or "tools/perf/Documentation/perf.html". + + - A leading slash matches the beginning of the pathname. + For example, "/{asterisk}.c" matches "cat-file.c" but not + "mozilla-sha1/sha1.c". + +Two consecutive asterisks ("`**`") in patterns matched against +full pathname may have special meaning: + + - A leading "`**`" followed by a slash means match in all + directories. For example, "`**/foo`" matches file or directory + "`foo`" anywhere, the same as pattern "`foo`". "`**/foo/bar`" + matches file or directory "`bar`" anywhere that is directly + under directory "`foo`". + + - A trailing "`/**`" matches everything inside. For example, + "`abc/**`" matches all files inside directory "`abc`", relative + to the location of the `.gitignore` file, with infinite depth. + + - A slash followed by two consecutive asterisks then a slash + matches zero or more directories. For example, "`a/**/b`" + matches "`a/b`", "`a/x/b`", "`a/x/y/b`" and so on. + + - Other consecutive asterisks are considered invalid. + +NOTES +----- + +The purpose of gitignore files is to ensure that certain files +not tracked by Git remain untracked. + +To stop tracking a file that is currently tracked, use +'git rm --cached'. + +EXAMPLES +-------- + +-------------------------------------------------------------- + $ git status + [...] + # Untracked files: + [...] + # Documentation/foo.html + # Documentation/gitignore.html + # file.o + # lib.a + # src/internal.o + [...] + $ cat .git/info/exclude + # ignore objects and archives, anywhere in the tree. + *.[oa] + $ cat Documentation/.gitignore + # ignore generated html files, + *.html + # except foo.html which is maintained by hand + !foo.html + $ git status + [...] + # Untracked files: + [...] + # Documentation/foo.html + [...] +-------------------------------------------------------------- + +Another example: + +-------------------------------------------------------------- + $ cat .gitignore + vmlinux* + $ ls arch/foo/kernel/vm* + arch/foo/kernel/vmlinux.lds.S + $ echo '!/vmlinux*' >arch/foo/kernel/.gitignore +-------------------------------------------------------------- + +The second .gitignore prevents Git from ignoring +`arch/foo/kernel/vmlinux.lds.S`. + +Example to exclude everything except a specific directory `foo/bar` +(note the `/*` - without the slash, the wildcard would also exclude +everything within `foo/bar`): + +-------------------------------------------------------------- + $ cat .gitignore + # exclude everything except directory foo/bar + /* + !/foo + /foo/* + !/foo/bar +-------------------------------------------------------------- + +SEE ALSO +-------- +linkgit:git-rm[1], +linkgit:gitrepository-layout[5], +linkgit:git-check-ignore[1] + +GIT +--- +Part of the linkgit:git[1] suite diff --git a/Documentation/gitk.txt b/Documentation/gitk.txt new file mode 100644 index 0000000..6ade002 --- /dev/null +++ b/Documentation/gitk.txt @@ -0,0 +1,200 @@ +gitk(1) +======= + +NAME +---- +gitk - The Git repository browser + +SYNOPSIS +-------- +[verse] +'gitk' [<options>] [<revision range>] [\--] [<path>...] + +DESCRIPTION +----------- +Displays changes in a repository or a selected set of commits. This includes +visualizing the commit graph, showing information related to each commit, and +the files in the trees of each revision. + +OPTIONS +------- + +To control which revisions to show, gitk supports most options +applicable to the 'git rev-list' command. It also supports a few +options applicable to the 'git diff-*' commands to control how the +changes each commit introduces are shown. Finally, it supports some +gitk-specific options. + +gitk generally only understands options with arguments in the +'sticked' form (see linkgit:gitcli[7]) due to limitations in the +command-line parser. + +rev-list options and arguments +~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ + +This manual page describes only the most frequently used options. See +linkgit:git-rev-list[1] for a complete list. + +--all:: + + Show all refs (branches, tags, etc.). + +--branches[=<pattern>]:: +--tags[=<pattern>]:: +--remotes[=<pattern>]:: + + Pretend as if all the branches (tags, remote branches, resp.) + are listed on the command line as '<commit>'. If '<pattern>' + is given, limit refs to ones matching given shell glob. If + pattern lacks '?', '{asterisk}', or '[', '/{asterisk}' at the + end is implied. + +--since=<date>:: + + Show commits more recent than a specific date. + +--until=<date>:: + + Show commits older than a specific date. + +--date-order:: + + Sort commits by date when possible. + +--merge:: + + After an attempt to merge stops with conflicts, show the commits on + the history between two branches (i.e. the HEAD and the MERGE_HEAD) + that modify the conflicted files and do not exist on all the heads + being merged. + +--left-right:: + + Mark which side of a symmetric diff a commit is reachable + from. Commits from the left side are prefixed with a `<` + symbol and those from the right with a `>` symbol. + +--full-history:: + + When filtering history with '<path>...', does not prune some + history. (See "History simplification" in linkgit:git-log[1] + for a more detailed explanation.) + +--simplify-merges:: + + Additional option to '--full-history' to remove some needless + merges from the resulting history, as there are no selected + commits contributing to this merge. (See "History + simplification" in linkgit:git-log[1] for a more detailed + explanation.) + +--ancestry-path:: + + When given a range of commits to display + (e.g. 'commit1..commit2' or 'commit2 {caret}commit1'), only + display commits that exist directly on the ancestry chain + between the 'commit1' and 'commit2', i.e. commits that are + both descendants of 'commit1', and ancestors of 'commit2'. + (See "History simplification" in linkgit:git-log[1] for a more + detailed explanation.) + +-L<start>,<end>:<file>:: +-L:<funcname>:<file>:: + + Trace the evolution of the line range given by "<start>,<end>" + (or the function name regex <funcname>) within the <file>. You may + not give any pathspec limiters. This is currently limited to + a walk starting from a single revision, i.e., you may only + give zero or one positive revision arguments. + You can specify this option more than once. ++ +*Note:* gitk (unlike linkgit:git-log[1]) currently only understands +this option if you specify it "glued together" with its argument. Do +*not* put a space after `-L`. ++ +include::line-range-format.txt[] + +<revision range>:: + + Limit the revisions to show. This can be either a single revision + meaning show from the given revision and back, or it can be a range in + the form "'<from>'..'<to>'" to show all revisions between '<from>' and + back to '<to>'. Note, more advanced revision selection can be applied. + For a more complete list of ways to spell object names, see + linkgit:gitrevisions[7]. + +<path>...:: + + Limit commits to the ones touching files in the given paths. Note, to + avoid ambiguity with respect to revision names use "--" to separate the paths + from any preceding options. + +gitk-specific options +~~~~~~~~~~~~~~~~~~~~~ + +--argscmd=<command>:: + + Command to be run each time gitk has to determine the revision + range to show. The command is expected to print on its + standard output a list of additional revisions to be shown, + one per line. Use this instead of explicitly specifying a + '<revision range>' if the set of commits to show may vary + between refreshes. + +--select-commit=<ref>:: + + Select the specified commit after loading the graph. + Default behavior is equivalent to specifying '--select-commit=HEAD'. + +Examples +-------- +gitk v2.6.12.. include/scsi drivers/scsi:: + + Show the changes since version 'v2.6.12' that changed any + file in the include/scsi or drivers/scsi subdirectories + +gitk --since="2 weeks ago" \-- gitk:: + + Show the changes during the last two weeks to the file 'gitk'. + The "--" is necessary to avoid confusion with the *branch* named + 'gitk' + +gitk --max-count=100 --all \-- Makefile:: + + Show at most 100 changes made to the file 'Makefile'. Instead of only + looking for changes in the current branch look in all branches. + +Files +----- +User configuration and preferences are stored at: + +* '$XDG_CONFIG_HOME/git/gitk' if it exists, otherwise +* '$HOME/.gitk' if it exists + +If neither of the above exist then '$XDG_CONFIG_HOME/git/gitk' is created and +used by default. If '$XDG_CONFIG_HOME' is not set it defaults to +'$HOME/.config' in all cases. + +History +------- +Gitk was the first graphical repository browser. It's written in +tcl/tk and started off in a separate repository but was later merged +into the main Git repository. + + +SEE ALSO +-------- +'qgit(1)':: + A repository browser written in C++ using Qt. + +'gitview(1)':: + A repository browser written in Python using Gtk. It's based on + 'bzrk(1)' and distributed in the contrib area of the Git repository. + +'tig(1)':: + A minimal repository browser and Git tool output highlighter written + in C using Ncurses. + +GIT +--- +Part of the linkgit:git[1] suite diff --git a/Documentation/gitmodules.txt b/Documentation/gitmodules.txt new file mode 100644 index 0000000..ac70eca --- /dev/null +++ b/Documentation/gitmodules.txt @@ -0,0 +1,107 @@ +gitmodules(5) +============= + +NAME +---- +gitmodules - defining submodule properties + +SYNOPSIS +-------- +$GIT_WORK_DIR/.gitmodules + + +DESCRIPTION +----------- + +The `.gitmodules` file, located in the top-level directory of a Git +working tree, is a text file with a syntax matching the requirements +of linkgit:git-config[1]. + +The file contains one subsection per submodule, and the subsection value +is the name of the submodule. The name is set to the path where the +submodule has been added unless it was customized with the '--name' +option of 'git submodule add'. Each submodule section also contains the +following required keys: + +submodule.<name>.path:: + Defines the path, relative to the top-level directory of the Git + working tree, where the submodule is expected to be checked out. + The path name must not end with a `/`. All submodule paths must + be unique within the .gitmodules file. + +submodule.<name>.url:: + Defines a URL from which the submodule repository can be cloned. + This may be either an absolute URL ready to be passed to + linkgit:git-clone[1] or (if it begins with ./ or ../) a location + relative to the superproject's origin repository. + +In addition, there are a number of optional keys: + +submodule.<name>.update:: + Defines the default update procedure for the named submodule, + i.e. how the submodule is updated by "git submodule update" + command in the superproject. This is only used by `git + submodule init` to initialize the configuration variable of + the same name. Allowed values here are 'checkout', 'rebase', + 'merge' or 'none'. See description of 'update' command in + linkgit:git-submodule[1] for their meaning. Note that the + '!command' form is intentionally ignored here for security + reasons. + +submodule.<name>.branch:: + A remote branch name for tracking updates in the upstream submodule. + If the option is not specified, it defaults to 'master'. See the + `--remote` documentation in linkgit:git-submodule[1] for details. + +submodule.<name>.fetchRecurseSubmodules:: + This option can be used to control recursive fetching of this + submodule. If this option is also present in the submodules entry in + .git/config of the superproject, the setting there will override the + one found in .gitmodules. + Both settings can be overridden on the command line by using the + "--[no-]recurse-submodules" option to "git fetch" and "git pull". + +submodule.<name>.ignore:: + Defines under what circumstances "git status" and the diff family show + a submodule as modified. When set to "all", it will never be considered + modified (but will nonetheless show up in the output of status and + commit when it has been staged), "dirty" will ignore all changes + to the submodules work tree and + takes only differences between the HEAD of the submodule and the commit + recorded in the superproject into account. "untracked" will additionally + let submodules with modified tracked files in their work tree show up. + Using "none" (the default when this option is not set) also shows + submodules that have untracked files in their work tree as changed. + If this option is also present in the submodules entry in .git/config of + the superproject, the setting there will override the one found in + .gitmodules. + Both settings can be overridden on the command line by using the + "--ignore-submodule" option. The 'git submodule' commands are not + affected by this setting. + + +EXAMPLES +-------- + +Consider the following .gitmodules file: + + [submodule "libfoo"] + path = include/foo + url = git://foo.com/git/lib.git + + [submodule "libbar"] + path = include/bar + url = git://bar.com/git/lib.git + + +This defines two submodules, `libfoo` and `libbar`. These are expected to +be checked out in the paths 'include/foo' and 'include/bar', and for both +submodules a URL is specified which can be used for cloning the submodules. + +SEE ALSO +-------- +linkgit:git-submodule[1] linkgit:git-config[1] + +GIT +--- +Part of the linkgit:git[1] suite diff --git a/Documentation/gitnamespaces.txt b/Documentation/gitnamespaces.txt new file mode 100644 index 0000000..7685e36 --- /dev/null +++ b/Documentation/gitnamespaces.txt @@ -0,0 +1,82 @@ +gitnamespaces(7) +================ + +NAME +---- +gitnamespaces - Git namespaces + +SYNOPSIS +-------- +[verse] +GIT_NAMESPACE=<namespace> 'git upload-pack' +GIT_NAMESPACE=<namespace> 'git receive-pack' + + +DESCRIPTION +----------- + +Git supports dividing the refs of a single repository into multiple +namespaces, each of which has its own branches, tags, and HEAD. Git can +expose each namespace as an independent repository to pull from and push +to, while sharing the object store, and exposing all the refs to +operations such as linkgit:git-gc[1]. + +Storing multiple repositories as namespaces of a single repository +avoids storing duplicate copies of the same objects, such as when +storing multiple branches of the same source. The alternates mechanism +provides similar support for avoiding duplicates, but alternates do not +prevent duplication between new objects added to the repositories +without ongoing maintenance, while namespaces do. + +To specify a namespace, set the `GIT_NAMESPACE` environment variable to +the namespace. For each ref namespace, Git stores the corresponding +refs in a directory under `refs/namespaces/`. For example, +`GIT_NAMESPACE=foo` will store refs under `refs/namespaces/foo/`. You +can also specify namespaces via the `--namespace` option to +linkgit:git[1]. + +Note that namespaces which include a `/` will expand to a hierarchy of +namespaces; for example, `GIT_NAMESPACE=foo/bar` will store refs under +`refs/namespaces/foo/refs/namespaces/bar/`. This makes paths in +`GIT_NAMESPACE` behave hierarchically, so that cloning with +`GIT_NAMESPACE=foo/bar` produces the same result as cloning with +`GIT_NAMESPACE=foo` and cloning from that repo with `GIT_NAMESPACE=bar`. It +also avoids ambiguity with strange namespace paths such as `foo/refs/heads/`, +which could otherwise generate directory/file conflicts within the `refs` +directory. + +linkgit:git-upload-pack[1] and linkgit:git-receive-pack[1] rewrite the +names of refs as specified by `GIT_NAMESPACE`. git-upload-pack and +git-receive-pack will ignore all references outside the specified +namespace. + +The smart HTTP server, linkgit:git-http-backend[1], will pass +GIT_NAMESPACE through to the backend programs; see +linkgit:git-http-backend[1] for sample configuration to expose +repository namespaces as repositories. + +For a simple local test, you can use linkgit:git-remote-ext[1]: + +---------- +git clone ext::'git --namespace=foo %s /tmp/prefixed.git' +---------- + +SECURITY +-------- + +Anyone with access to any namespace within a repository can potentially +access objects from any other namespace stored in the same repository. +You can't directly say "give me object ABCD" if you don't have a ref to +it, but you can do some other sneaky things like: + +. Claiming to push ABCD, at which point the server will optimize out the + need for you to actually send it. Now you have a ref to ABCD and can + fetch it (claiming not to have it, of course). + +. Requesting other refs, claiming that you have ABCD, at which point the + server may generate deltas against ABCD. + +None of this causes a problem if you only host public repositories, or +if everyone who may read one namespace may also read everything in every +other namespace (for instance, if everyone in an organization has read +permission to every repository). diff --git a/Documentation/gitremote-helpers.txt b/Documentation/gitremote-helpers.txt new file mode 100644 index 0000000..78e0b27 --- /dev/null +++ b/Documentation/gitremote-helpers.txt @@ -0,0 +1,468 @@ +gitremote-helpers(1) +==================== + +NAME +---- +gitremote-helpers - Helper programs to interact with remote repositories + +SYNOPSIS +-------- +[verse] +'git remote-<transport>' <repository> [<URL>] + +DESCRIPTION +----------- + +Remote helper programs are normally not used directly by end users, +but they are invoked by Git when it needs to interact with remote +repositories Git does not support natively. A given helper will +implement a subset of the capabilities documented here. When Git +needs to interact with a repository using a remote helper, it spawns +the helper as an independent process, sends commands to the helper's +standard input, and expects results from the helper's standard +output. Because a remote helper runs as an independent process from +Git, there is no need to re-link Git to add a new helper, nor any +need to link the helper with the implementation of Git. + +Every helper must support the "capabilities" command, which Git +uses to determine what other commands the helper will accept. Those +other commands can be used to discover and update remote refs, +transport objects between the object database and the remote repository, +and update the local object store. + +Git comes with a "curl" family of remote helpers, that handle various +transport protocols, such as 'git-remote-http', 'git-remote-https', +'git-remote-ftp' and 'git-remote-ftps'. They implement the capabilities +'fetch', 'option', and 'push'. + +INVOCATION +---------- + +Remote helper programs are invoked with one or (optionally) two +arguments. The first argument specifies a remote repository as in Git; +it is either the name of a configured remote or a URL. The second +argument specifies a URL; it is usually of the form +'<transport>://<address>', but any arbitrary string is possible. +The 'GIT_DIR' environment variable is set up for the remote helper +and can be used to determine where to store additional data or from +which directory to invoke auxiliary Git commands. + +When Git encounters a URL of the form '<transport>://<address>', where +'<transport>' is a protocol that it cannot handle natively, it +automatically invokes 'git remote-<transport>' with the full URL as +the second argument. If such a URL is encountered directly on the +command line, the first argument is the same as the second, and if it +is encountered in a configured remote, the first argument is the name +of that remote. + +A URL of the form '<transport>::<address>' explicitly instructs Git to +invoke 'git remote-<transport>' with '<address>' as the second +argument. If such a URL is encountered directly on the command line, +the first argument is '<address>', and if it is encountered in a +configured remote, the first argument is the name of that remote. + +Additionally, when a configured remote has 'remote.<name>.vcs' set to +'<transport>', Git explicitly invokes 'git remote-<transport>' with +'<name>' as the first argument. If set, the second argument is +'remote.<name>.url'; otherwise, the second argument is omitted. + +INPUT FORMAT +------------ + +Git sends the remote helper a list of commands on standard input, one +per line. The first command is always the 'capabilities' command, in +response to which the remote helper must print a list of the +capabilities it supports (see below) followed by a blank line. The +response to the capabilities command determines what commands Git uses +in the remainder of the command stream. + +The command stream is terminated by a blank line. In some cases +(indicated in the documentation of the relevant commands), this blank +line is followed by a payload in some other protocol (e.g., the pack +protocol), while in others it indicates the end of input. + +Capabilities +~~~~~~~~~~~~ + +Each remote helper is expected to support only a subset of commands. +The operations a helper supports are declared to Git in the response +to the `capabilities` command (see COMMANDS, below). + +In the following, we list all defined capabilities and for +each we list which commands a helper with that capability +must provide. + +Capabilities for Pushing +^^^^^^^^^^^^^^^^^^^^^^^^ +'connect':: + Can attempt to connect to 'git receive-pack' (for pushing), + 'git upload-pack', etc for communication using + git's native packfile protocol. This + requires a bidirectional, full-duplex connection. ++ +Supported commands: 'connect'. + +'push':: + Can discover remote refs and push local commits and the + history leading up to them to new or existing remote refs. ++ +Supported commands: 'list for-push', 'push'. + +'export':: + Can discover remote refs and push specified objects from a + fast-import stream to remote refs. ++ +Supported commands: 'list for-push', 'export'. + +If a helper advertises 'connect', Git will use it if possible and +fall back to another capability if the helper requests so when +connecting (see the 'connect' command under COMMANDS). +When choosing between 'push' and 'export', Git prefers 'push'. +Other frontends may have some other order of preference. + +'no-private-update':: + When using the 'refspec' capability, git normally updates the + private ref on successful push. This update is disabled when + the remote-helper declares the capability 'no-private-update'. + + +Capabilities for Fetching +^^^^^^^^^^^^^^^^^^^^^^^^^ +'connect':: + Can try to connect to 'git upload-pack' (for fetching), + 'git receive-pack', etc for communication using the + Git's native packfile protocol. This + requires a bidirectional, full-duplex connection. ++ +Supported commands: 'connect'. + +'fetch':: + Can discover remote refs and transfer objects reachable from + them to the local object store. ++ +Supported commands: 'list', 'fetch'. + +'import':: + Can discover remote refs and output objects reachable from + them as a stream in fast-import format. ++ +Supported commands: 'list', 'import'. + +'check-connectivity':: + Can guarantee that when a clone is requested, the received + pack is self contained and is connected. + +If a helper advertises 'connect', Git will use it if possible and +fall back to another capability if the helper requests so when +connecting (see the 'connect' command under COMMANDS). +When choosing between 'fetch' and 'import', Git prefers 'fetch'. +Other frontends may have some other order of preference. + +Miscellaneous capabilities +^^^^^^^^^^^^^^^^^^^^^^^^^^ + +'option':: + For specifying settings like `verbosity` (how much output to + write to stderr) and `depth` (how much history is wanted in the + case of a shallow clone) that affect how other commands are + carried out. + +'refspec' <refspec>:: + For remote helpers that implement 'import' or 'export', this capability + allows the refs to be constrained to a private namespace, instead of + writing to refs/heads or refs/remotes directly. + It is recommended that all importers providing the 'import' + capability use this. It's mandatory for 'export'. ++ +A helper advertising the capability +`refspec refs/heads/*:refs/svn/origin/branches/*` +is saying that, when it is asked to `import refs/heads/topic`, the +stream it outputs will update the `refs/svn/origin/branches/topic` +ref. ++ +This capability can be advertised multiple times. The first +applicable refspec takes precedence. The left-hand of refspecs +advertised with this capability must cover all refs reported by +the list command. If no 'refspec' capability is advertised, +there is an implied `refspec *:*`. ++ +When writing remote-helpers for decentralized version control +systems, it is advised to keep a local copy of the repository to +interact with, and to let the private namespace refs point to this +local repository, while the refs/remotes namespace is used to track +the remote repository. + +'bidi-import':: + This modifies the 'import' capability. + The fast-import commands 'cat-blob' and 'ls' can be used by remote-helpers + to retrieve information about blobs and trees that already exist in + fast-import's memory. This requires a channel from fast-import to the + remote-helper. + If it is advertised in addition to "import", Git establishes a pipe from + fast-import to the remote-helper's stdin. + It follows that Git and fast-import are both connected to the + remote-helper's stdin. Because Git can send multiple commands to + the remote-helper it is required that helpers that use 'bidi-import' + buffer all 'import' commands of a batch before sending data to fast-import. + This is to prevent mixing commands and fast-import responses on the + helper's stdin. + +'export-marks' <file>:: + This modifies the 'export' capability, instructing Git to dump the + internal marks table to <file> when complete. For details, + read up on '--export-marks=<file>' in linkgit:git-fast-export[1]. + +'import-marks' <file>:: + This modifies the 'export' capability, instructing Git to load the + marks specified in <file> before processing any input. For details, + read up on '--import-marks=<file>' in linkgit:git-fast-export[1]. + +'signed-tags':: + This modifies the 'export' capability, instructing Git to pass + '--signed-tags=verbatim' to linkgit:git-fast-export[1]. In the + absence of this capability, Git will use '--signed-tags=warn-strip'. + + + +COMMANDS +-------- + +Commands are given by the caller on the helper's standard input, one per line. + +'capabilities':: + Lists the capabilities of the helper, one per line, ending + with a blank line. Each capability may be preceded with '*', + which marks them mandatory for Git versions using the remote + helper to understand. Any unknown mandatory capability is a + fatal error. ++ +Support for this command is mandatory. + +'list':: + Lists the refs, one per line, in the format "<value> <name> + [<attr> ...]". The value may be a hex sha1 hash, "@<dest>" for + a symref, or "?" to indicate that the helper could not get the + value of the ref. A space-separated list of attributes follows + the name; unrecognized attributes are ignored. The list ends + with a blank line. ++ +See REF LIST ATTRIBUTES for a list of currently defined attributes. ++ +Supported if the helper has the "fetch" or "import" capability. + +'list for-push':: + Similar to 'list', except that it is used if and only if + the caller wants to the resulting ref list to prepare + push commands. + A helper supporting both push and fetch can use this + to distinguish for which operation the output of 'list' + is going to be used, possibly reducing the amount + of work that needs to be performed. ++ +Supported if the helper has the "push" or "export" capability. + +'option' <name> <value>:: + Sets the transport helper option <name> to <value>. Outputs a + single line containing one of 'ok' (option successfully set), + 'unsupported' (option not recognized) or 'error <msg>' + (option <name> is supported but <value> is not valid + for it). Options should be set before other commands, + and may influence the behavior of those commands. ++ +See OPTIONS for a list of currently defined options. ++ +Supported if the helper has the "option" capability. + +'fetch' <sha1> <name>:: + Fetches the given object, writing the necessary objects + to the database. Fetch commands are sent in a batch, one + per line, terminated with a blank line. + Outputs a single blank line when all fetch commands in the + same batch are complete. Only objects which were reported + in the output of 'list' with a sha1 may be fetched this way. ++ +Optionally may output a 'lock <file>' line indicating a file under +GIT_DIR/objects/pack which is keeping a pack until refs can be +suitably updated. ++ +If option 'check-connectivity' is requested, the helper must output +'connectivity-ok' if the clone is self-contained and connected. ++ +Supported if the helper has the "fetch" capability. + +'push' +<src>:<dst>:: + Pushes the given local <src> commit or branch to the + remote branch described by <dst>. A batch sequence of + one or more 'push' commands is terminated with a blank line + (if there is only one reference to push, a single 'push' command + is followed by a blank line). For example, the following would + be two batches of 'push', the first asking the remote-helper + to push the local ref 'master' to the remote ref 'master' and + the local 'HEAD' to the remote 'branch', and the second + asking to push ref 'foo' to ref 'bar' (forced update requested + by the '+'). ++ +------------ +push refs/heads/master:refs/heads/master +push HEAD:refs/heads/branch +\n +push +refs/heads/foo:refs/heads/bar +\n +------------ ++ +Zero or more protocol options may be entered after the last 'push' +command, before the batch's terminating blank line. ++ +When the push is complete, outputs one or more 'ok <dst>' or +'error <dst> <why>?' lines to indicate success or failure of +each pushed ref. The status report output is terminated by +a blank line. The option field <why> may be quoted in a C +style string if it contains an LF. ++ +Supported if the helper has the "push" capability. + +'import' <name>:: + Produces a fast-import stream which imports the current value + of the named ref. It may additionally import other refs as + needed to construct the history efficiently. The script writes + to a helper-specific private namespace. The value of the named + ref should be written to a location in this namespace derived + by applying the refspecs from the "refspec" capability to the + name of the ref. ++ +Especially useful for interoperability with a foreign versioning +system. ++ +Just like 'push', a batch sequence of one or more 'import' is +terminated with a blank line. For each batch of 'import', the remote +helper should produce a fast-import stream terminated by a 'done' +command. ++ +Note that if the 'bidi-import' capability is used the complete batch +sequence has to be buffered before starting to send data to fast-import +to prevent mixing of commands and fast-import responses on the helper's +stdin. ++ +Supported if the helper has the "import" capability. + +'export':: + Instructs the remote helper that any subsequent input is + part of a fast-import stream (generated by 'git fast-export') + containing objects which should be pushed to the remote. ++ +Especially useful for interoperability with a foreign versioning +system. ++ +The 'export-marks' and 'import-marks' capabilities, if specified, +affect this command in so far as they are passed on to 'git +fast-export', which then will load/store a table of marks for +local objects. This can be used to implement for incremental +operations. ++ +Supported if the helper has the "export" capability. + +'connect' <service>:: + Connects to given service. Standard input and standard output + of helper are connected to specified service (git prefix is + included in service name so e.g. fetching uses 'git-upload-pack' + as service) on remote side. Valid replies to this command are + empty line (connection established), 'fallback' (no smart + transport support, fall back to dumb transports) and just + exiting with error message printed (can't connect, don't + bother trying to fall back). After line feed terminating the + positive (empty) response, the output of service starts. After + the connection ends, the remote helper exits. ++ +Supported if the helper has the "connect" capability. + +If a fatal error occurs, the program writes the error message to +stderr and exits. The caller should expect that a suitable error +message has been printed if the child closes the connection without +completing a valid response for the current command. + +Additional commands may be supported, as may be determined from +capabilities reported by the helper. + +REF LIST ATTRIBUTES +------------------- + +The 'list' command produces a list of refs in which each ref +may be followed by a list of attributes. The following ref list +attributes are defined. + +'unchanged':: + This ref is unchanged since the last import or fetch, although + the helper cannot necessarily determine what value that produced. + +OPTIONS +------- + +The following options are defined and (under suitable circumstances) +set by Git if the remote helper has the 'option' capability. + +'option verbosity' <n>:: + Changes the verbosity of messages displayed by the helper. + A value of 0 for <n> means that processes operate + quietly, and the helper produces only error output. + 1 is the default level of verbosity, and higher values + of <n> correspond to the number of -v flags passed on the + command line. + +'option progress' {'true'|'false'}:: + Enables (or disables) progress messages displayed by the + transport helper during a command. + +'option depth' <depth>:: + Deepens the history of a shallow repository. + +'option followtags' {'true'|'false'}:: + If enabled the helper should automatically fetch annotated + tag objects if the object the tag points at was transferred + during the fetch command. If the tag is not fetched by + the helper a second fetch command will usually be sent to + ask for the tag specifically. Some helpers may be able to + use this option to avoid a second network connection. + +'option dry-run' {'true'|'false'}: + If true, pretend the operation completed successfully, + but don't actually change any repository data. For most + helpers this only applies to the 'push', if supported. + +'option servpath <c-style-quoted-path>':: + Sets service path (--upload-pack, --receive-pack etc.) for + next connect. Remote helper may support this option, but + must not rely on this option being set before + connect request occurs. + +'option check-connectivity' {'true'|'false'}:: + Request the helper to check connectivity of a clone. + +'option force' {'true'|'false'}:: + Request the helper to perform a force update. Defaults to + 'false'. + +'option cloning {'true'|'false'}:: + Notify the helper this is a clone request (i.e. the current + repository is guaranteed empty). + +'option update-shallow {'true'|'false'}:: + Allow to extend .git/shallow if the new refs require it. + +'option pushcert {'true'|'false'}:: + GPG sign pushes. + +SEE ALSO +-------- +linkgit:git-remote[1] + +linkgit:git-remote-ext[1] + +linkgit:git-remote-fd[1] + +linkgit:git-remote-testgit[1] + +linkgit:git-fast-import[1] + +GIT +--- +Part of the linkgit:git[1] suite diff --git a/Documentation/gitrepository-layout.txt b/Documentation/gitrepository-layout.txt new file mode 100644 index 0000000..577ee84 --- /dev/null +++ b/Documentation/gitrepository-layout.txt @@ -0,0 +1,292 @@ +gitrepository-layout(5) +======================= + +NAME +---- +gitrepository-layout - Git Repository Layout + +SYNOPSIS +-------- +$GIT_DIR/* + +DESCRIPTION +----------- + +A Git repository comes in two different flavours: + + * a `.git` directory at the root of the working tree; + + * a `<project>.git` directory that is a 'bare' repository + (i.e. without its own working tree), that is typically used for + exchanging histories with others by pushing into it and fetching + from it. + +*Note*: Also you can have a plain text file `.git` at the root of +your working tree, containing `gitdir: <path>` to point at the real +directory that has the repository. This mechanism is often used for +a working tree of a submodule checkout, to allow you in the +containing superproject to `git checkout` a branch that does not +have the submodule. The `checkout` has to remove the entire +submodule working tree, without losing the submodule repository. + +These things may exist in a Git repository. + +objects:: + Object store associated with this repository. Usually + an object store is self sufficient (i.e. all the objects + that are referred to by an object found in it are also + found in it), but there are a few ways to violate it. ++ +. You could have an incomplete but locally usable repository +by creating a shallow clone. See linkgit:git-clone[1]. +. You could be using the `objects/info/alternates` or +`$GIT_ALTERNATE_OBJECT_DIRECTORIES` mechanisms to 'borrow' +objects from other object stores. A repository with this kind +of incomplete object store is not suitable to be published for +use with dumb transports but otherwise is OK as long as +`objects/info/alternates` points at the object stores it +borrows from. ++ +This directory is ignored if $GIT_COMMON_DIR is set and +"$GIT_COMMON_DIR/objects" will be used instead. + +objects/[0-9a-f][0-9a-f]:: + A newly created object is stored in its own file. + The objects are splayed over 256 subdirectories using + the first two characters of the sha1 object name to + keep the number of directory entries in `objects` + itself to a manageable number. Objects found + here are often called 'unpacked' (or 'loose') objects. + +objects/pack:: + Packs (files that store many object in compressed form, + along with index files to allow them to be randomly + accessed) are found in this directory. + +objects/info:: + Additional information about the object store is + recorded in this directory. + +objects/info/packs:: + This file is to help dumb transports discover what packs + are available in this object store. Whenever a pack is + added or removed, `git update-server-info` should be run + to keep this file up-to-date if the repository is + published for dumb transports. 'git repack' does this + by default. + +objects/info/alternates:: + This file records paths to alternate object stores that + this object store borrows objects from, one pathname per + line. Note that not only native Git tools use it locally, + but the HTTP fetcher also tries to use it remotely; this + will usually work if you have relative paths (relative + to the object database, not to the repository!) in your + alternates file, but it will not work if you use absolute + paths unless the absolute path in filesystem and web URL + is the same. See also 'objects/info/http-alternates'. + +objects/info/http-alternates:: + This file records URLs to alternate object stores that + this object store borrows objects from, to be used when + the repository is fetched over HTTP. + +refs:: + References are stored in subdirectories of this + directory. The 'git prune' command knows to preserve + objects reachable from refs found in this directory and + its subdirectories. This directory is ignored if $GIT_COMMON_DIR + is set and "$GIT_COMMON_DIR/refs" will be used instead. + +refs/heads/`name`:: + records tip-of-the-tree commit objects of branch `name` + +refs/tags/`name`:: + records any object name (not necessarily a commit + object, or a tag object that points at a commit object). + +refs/remotes/`name`:: + records tip-of-the-tree commit objects of branches copied + from a remote repository. + +refs/replace/`<obj-sha1>`:: + records the SHA-1 of the object that replaces `<obj-sha1>`. + This is similar to info/grafts and is internally used and + maintained by linkgit:git-replace[1]. Such refs can be exchanged + between repositories while grafts are not. + +packed-refs:: + records the same information as refs/heads/, refs/tags/, + and friends record in a more efficient way. See + linkgit:git-pack-refs[1]. This file is ignored if $GIT_COMMON_DIR + is set and "$GIT_COMMON_DIR/packed-refs" will be used instead. + +HEAD:: + A symref (see glossary) to the `refs/heads/` namespace + describing the currently active branch. It does not mean + much if the repository is not associated with any working tree + (i.e. a 'bare' repository), but a valid Git repository + *must* have the HEAD file; some porcelains may use it to + guess the designated "default" branch of the repository + (usually 'master'). It is legal if the named branch + 'name' does not (yet) exist. In some legacy setups, it is + a symbolic link instead of a symref that points at the current + branch. ++ +HEAD can also record a specific commit directly, instead of +being a symref to point at the current branch. Such a state +is often called 'detached HEAD.' See linkgit:git-checkout[1] +for details. + +config:: + Repository specific configuration file. This file is ignored + if $GIT_COMMON_DIR is set and "$GIT_COMMON_DIR/config" will be + used instead. + +branches:: + A slightly deprecated way to store shorthands to be used + to specify a URL to 'git fetch', 'git pull' and 'git push'. + A file can be stored as `branches/<name>` and then + 'name' can be given to these commands in place of + 'repository' argument. See the REMOTES section in + linkgit:git-fetch[1] for details. This mechanism is legacy + and not likely to be found in modern repositories. This + directory is ignored if $GIT_COMMON_DIR is set and + "$GIT_COMMON_DIR/branches" will be used instead. + + +hooks:: + Hooks are customization scripts used by various Git + commands. A handful of sample hooks are installed when + 'git init' is run, but all of them are disabled by + default. To enable, the `.sample` suffix has to be + removed from the filename by renaming. + Read linkgit:githooks[5] for more details about + each hook. This directory is ignored if $GIT_COMMON_DIR is set + and "$GIT_COMMON_DIR/hooks" will be used instead. + + +index:: + The current index file for the repository. It is + usually not found in a bare repository. + +sharedindex.<SHA-1>:: + The shared index part, to be referenced by $GIT_DIR/index and + other temporary index files. Only valid in split index mode. + +info:: + Additional information about the repository is recorded + in this directory. This directory is ignored if $GIT_COMMON_DIR + is set and "$GIT_COMMON_DIR/index" will be used instead. + +info/refs:: + This file helps dumb transports discover what refs are + available in this repository. If the repository is + published for dumb transports, this file should be + regenerated by 'git update-server-info' every time a tag + or branch is created or modified. This is normally done + from the `hooks/update` hook, which is run by the + 'git-receive-pack' command when you 'git push' into the + repository. + +info/grafts:: + This file records fake commit ancestry information, to + pretend the set of parents a commit has is different + from how the commit was actually created. One record + per line describes a commit and its fake parents by + listing their 40-byte hexadecimal object names separated + by a space and terminated by a newline. ++ +Note that the grafts mechanism is outdated and can lead to problems +transferring objects between repositories; see linkgit:git-replace[1] +for a more flexible and robust system to do the same thing. + +info/exclude:: + This file, by convention among Porcelains, stores the + exclude pattern list. `.gitignore` is the per-directory + ignore file. 'git status', 'git add', 'git rm' and + 'git clean' look at it but the core Git commands do not look + at it. See also: linkgit:gitignore[5]. + +info/sparse-checkout:: + This file stores sparse checkout patterns. + See also: linkgit:git-read-tree[1]. + +remotes:: + Stores shorthands for URL and default refnames for use + when interacting with remote repositories via 'git fetch', + 'git pull' and 'git push' commands. See the REMOTES section + in linkgit:git-fetch[1] for details. This mechanism is legacy + and not likely to be found in modern repositories. This + directory is ignored if $GIT_COMMON_DIR is set and + "$GIT_COMMON_DIR/remotes" will be used instead. + +logs:: + Records of changes made to refs are stored in this directory. + See linkgit:git-update-ref[1] for more information. This + directory is ignored if $GIT_COMMON_DIR is set and + "$GIT_COMMON_DIR/logs" will be used instead. + +logs/refs/heads/`name`:: + Records all changes made to the branch tip named `name`. + +logs/refs/tags/`name`:: + Records all changes made to the tag named `name`. + +shallow:: + This is similar to `info/grafts` but is internally used + and maintained by shallow clone mechanism. See `--depth` + option to linkgit:git-clone[1] and linkgit:git-fetch[1]. This + file is ignored if $GIT_COMMON_DIR is set and + "$GIT_COMMON_DIR/shallow" will be used instead. + +commondir:: + If this file exists, $GIT_COMMON_DIR (see linkgit:git[1]) will + be set to the path specified in this file if it is not + explicitly set. If the specified path is relative, it is + relative to $GIT_DIR. The repository with commondir is + incomplete without the repository pointed by "commondir". + +modules:: + Contains the git-repositories of the submodules. + +worktrees:: + Contains administrative data for linked + working trees. Each subdirectory contains the working tree-related + part of a linked working tree. This directory is ignored if + $GIT_COMMON_DIR is set, in which case + "$GIT_COMMON_DIR/worktrees" will be used instead. + +worktrees/<id>/gitdir:: + A text file containing the absolute path back to the .git file + that points to here. This is used to check if the linked + repository has been manually removed and there is no need to + keep this directory any more. The mtime of this file should be + updated every time the linked repository is accessed. + +worktrees/<id>/locked:: + If this file exists, the linked working tree may be on a + portable device and not available. The presence of this file + prevents `worktrees/<id>` from being pruned either automatically + or manually by `git worktree prune`. The file may contain a string + explaining why the repository is locked. + +worktrees/<id>/link:: + If this file exists, it is a hard link to the linked .git + file. It is used to detect if the linked repository is + manually removed. + +SEE ALSO +-------- +linkgit:git-init[1], +linkgit:git-clone[1], +linkgit:git-fetch[1], +linkgit:git-pack-refs[1], +linkgit:git-gc[1], +linkgit:git-checkout[1], +linkgit:gitglossary[7], +link:user-manual.html[The Git User's Manual] + +GIT +--- +Part of the linkgit:git[1] suite. diff --git a/Documentation/gitrevisions.txt b/Documentation/gitrevisions.txt new file mode 100644 index 0000000..e903eb7 --- /dev/null +++ b/Documentation/gitrevisions.txt @@ -0,0 +1,35 @@ +gitrevisions(7) +=============== + +NAME +---- +gitrevisions - specifying revisions and ranges for Git + +SYNOPSIS +-------- +gitrevisions + + +DESCRIPTION +----------- + +Many Git commands take revision parameters as arguments. Depending on +the command, they denote a specific commit or, for commands which +walk the revision graph (such as linkgit:git-log[1]), all commits which can +be reached from that commit. In the latter case one can also specify a +range of revisions explicitly. + +In addition, some Git commands (such as linkgit:git-show[1]) also take +revision parameters which denote other objects than commits, e.g. blobs +("files") or trees ("directories of files"). + +include::revisions.txt[] + + +SEE ALSO +-------- +linkgit:git-rev-parse[1] + +GIT +--- +Part of the linkgit:git[1] suite diff --git a/Documentation/gittutorial-2.txt b/Documentation/gittutorial-2.txt new file mode 100644 index 0000000..30d2119 --- /dev/null +++ b/Documentation/gittutorial-2.txt @@ -0,0 +1,436 @@ +gittutorial-2(7) +================ + +NAME +---- +gittutorial-2 - A tutorial introduction to Git: part two + +SYNOPSIS +-------- +[verse] +git * + +DESCRIPTION +----------- + +You should work through linkgit:gittutorial[7] before reading this tutorial. + +The goal of this tutorial is to introduce two fundamental pieces of +Git's architecture--the object database and the index file--and to +provide the reader with everything necessary to understand the rest +of the Git documentation. + +The Git object database +----------------------- + +Let's start a new project and create a small amount of history: + +------------------------------------------------ +$ mkdir test-project +$ cd test-project +$ git init +Initialized empty Git repository in .git/ +$ echo 'hello world' > file.txt +$ git add . +$ git commit -a -m "initial commit" +[master (root-commit) 54196cc] initial commit + 1 file changed, 1 insertion(+) + create mode 100644 file.txt +$ echo 'hello world!' >file.txt +$ git commit -a -m "add emphasis" +[master c4d59f3] add emphasis + 1 file changed, 1 insertion(+), 1 deletion(-) +------------------------------------------------ + +What are the 7 digits of hex that Git responded to the commit with? + +We saw in part one of the tutorial that commits have names like this. +It turns out that every object in the Git history is stored under +a 40-digit hex name. That name is the SHA-1 hash of the object's +contents; among other things, this ensures that Git will never store +the same data twice (since identical data is given an identical SHA-1 +name), and that the contents of a Git object will never change (since +that would change the object's name as well). The 7 char hex strings +here are simply the abbreviation of such 40 character long strings. +Abbreviations can be used everywhere where the 40 character strings +can be used, so long as they are unambiguous. + +It is expected that the content of the commit object you created while +following the example above generates a different SHA-1 hash than +the one shown above because the commit object records the time when +it was created and the name of the person performing the commit. + +We can ask Git about this particular object with the `cat-file` +command. Don't copy the 40 hex digits from this example but use those +from your own version. Note that you can shorten it to only a few +characters to save yourself typing all 40 hex digits: + +------------------------------------------------ +$ git cat-file -t 54196cc2 +commit +$ git cat-file commit 54196cc2 +tree 92b8b694ffb1675e5975148e1121810081dbdffe +author J. Bruce Fields <bfields@puzzle.fieldses.org> 1143414668 -0500 +committer J. Bruce Fields <bfields@puzzle.fieldses.org> 1143414668 -0500 + +initial commit +------------------------------------------------ + +A tree can refer to one or more "blob" objects, each corresponding to +a file. In addition, a tree can also refer to other tree objects, +thus creating a directory hierarchy. You can examine the contents of +any tree using ls-tree (remember that a long enough initial portion +of the SHA-1 will also work): + +------------------------------------------------ +$ git ls-tree 92b8b694 +100644 blob 3b18e512dba79e4c8300dd08aeb37f8e728b8dad file.txt +------------------------------------------------ + +Thus we see that this tree has one file in it. The SHA-1 hash is a +reference to that file's data: + +------------------------------------------------ +$ git cat-file -t 3b18e512 +blob +------------------------------------------------ + +A "blob" is just file data, which we can also examine with cat-file: + +------------------------------------------------ +$ git cat-file blob 3b18e512 +hello world +------------------------------------------------ + +Note that this is the old file data; so the object that Git named in +its response to the initial tree was a tree with a snapshot of the +directory state that was recorded by the first commit. + +All of these objects are stored under their SHA-1 names inside the Git +directory: + +------------------------------------------------ +$ find .git/objects/ +.git/objects/ +.git/objects/pack +.git/objects/info +.git/objects/3b +.git/objects/3b/18e512dba79e4c8300dd08aeb37f8e728b8dad +.git/objects/92 +.git/objects/92/b8b694ffb1675e5975148e1121810081dbdffe +.git/objects/54 +.git/objects/54/196cc2703dc165cbd373a65a4dcf22d50ae7f7 +.git/objects/a0 +.git/objects/a0/423896973644771497bdc03eb99d5281615b51 +.git/objects/d0 +.git/objects/d0/492b368b66bdabf2ac1fd8c92b39d3db916e59 +.git/objects/c4 +.git/objects/c4/d59f390b9cfd4318117afde11d601c1085f241 +------------------------------------------------ + +and the contents of these files is just the compressed data plus a +header identifying their length and their type. The type is either a +blob, a tree, a commit, or a tag. + +The simplest commit to find is the HEAD commit, which we can find +from .git/HEAD: + +------------------------------------------------ +$ cat .git/HEAD +ref: refs/heads/master +------------------------------------------------ + +As you can see, this tells us which branch we're currently on, and it +tells us this by naming a file under the .git directory, which itself +contains a SHA-1 name referring to a commit object, which we can +examine with cat-file: + +------------------------------------------------ +$ cat .git/refs/heads/master +c4d59f390b9cfd4318117afde11d601c1085f241 +$ git cat-file -t c4d59f39 +commit +$ git cat-file commit c4d59f39 +tree d0492b368b66bdabf2ac1fd8c92b39d3db916e59 +parent 54196cc2703dc165cbd373a65a4dcf22d50ae7f7 +author J. Bruce Fields <bfields@puzzle.fieldses.org> 1143418702 -0500 +committer J. Bruce Fields <bfields@puzzle.fieldses.org> 1143418702 -0500 + +add emphasis +------------------------------------------------ + +The "tree" object here refers to the new state of the tree: + +------------------------------------------------ +$ git ls-tree d0492b36 +100644 blob a0423896973644771497bdc03eb99d5281615b51 file.txt +$ git cat-file blob a0423896 +hello world! +------------------------------------------------ + +and the "parent" object refers to the previous commit: + +------------------------------------------------ +$ git cat-file commit 54196cc2 +tree 92b8b694ffb1675e5975148e1121810081dbdffe +author J. Bruce Fields <bfields@puzzle.fieldses.org> 1143414668 -0500 +committer J. Bruce Fields <bfields@puzzle.fieldses.org> 1143414668 -0500 + +initial commit +------------------------------------------------ + +The tree object is the tree we examined first, and this commit is +unusual in that it lacks any parent. + +Most commits have only one parent, but it is also common for a commit +to have multiple parents. In that case the commit represents a +merge, with the parent references pointing to the heads of the merged +branches. + +Besides blobs, trees, and commits, the only remaining type of object +is a "tag", which we won't discuss here; refer to linkgit:git-tag[1] +for details. + +So now we know how Git uses the object database to represent a +project's history: + + * "commit" objects refer to "tree" objects representing the + snapshot of a directory tree at a particular point in the + history, and refer to "parent" commits to show how they're + connected into the project history. + * "tree" objects represent the state of a single directory, + associating directory names to "blob" objects containing file + data and "tree" objects containing subdirectory information. + * "blob" objects contain file data without any other structure. + * References to commit objects at the head of each branch are + stored in files under .git/refs/heads/. + * The name of the current branch is stored in .git/HEAD. + +Note, by the way, that lots of commands take a tree as an argument. +But as we can see above, a tree can be referred to in many different +ways--by the SHA-1 name for that tree, by the name of a commit that +refers to the tree, by the name of a branch whose head refers to that +tree, etc.--and most such commands can accept any of these names. + +In command synopses, the word "tree-ish" is sometimes used to +designate such an argument. + +The index file +-------------- + +The primary tool we've been using to create commits is `git-commit +-a`, which creates a commit including every change you've made to +your working tree. But what if you want to commit changes only to +certain files? Or only certain changes to certain files? + +If we look at the way commits are created under the cover, we'll see +that there are more flexible ways creating commits. + +Continuing with our test-project, let's modify file.txt again: + +------------------------------------------------ +$ echo "hello world, again" >>file.txt +------------------------------------------------ + +but this time instead of immediately making the commit, let's take an +intermediate step, and ask for diffs along the way to keep track of +what's happening: + +------------------------------------------------ +$ git diff +--- a/file.txt ++++ b/file.txt +@@ -1 +1,2 @@ + hello world! ++hello world, again +$ git add file.txt +$ git diff +------------------------------------------------ + +The last diff is empty, but no new commits have been made, and the +head still doesn't contain the new line: + +------------------------------------------------ +$ git diff HEAD +diff --git a/file.txt b/file.txt +index a042389..513feba 100644 +--- a/file.txt ++++ b/file.txt +@@ -1 +1,2 @@ + hello world! ++hello world, again +------------------------------------------------ + +So 'git diff' is comparing against something other than the head. +The thing that it's comparing against is actually the index file, +which is stored in .git/index in a binary format, but whose contents +we can examine with ls-files: + +------------------------------------------------ +$ git ls-files --stage +100644 513feba2e53ebbd2532419ded848ba19de88ba00 0 file.txt +$ git cat-file -t 513feba2 +blob +$ git cat-file blob 513feba2 +hello world! +hello world, again +------------------------------------------------ + +So what our 'git add' did was store a new blob and then put +a reference to it in the index file. If we modify the file again, +we'll see that the new modifications are reflected in the 'git diff' +output: + +------------------------------------------------ +$ echo 'again?' >>file.txt +$ git diff +index 513feba..ba3da7b 100644 +--- a/file.txt ++++ b/file.txt +@@ -1,2 +1,3 @@ + hello world! + hello world, again ++again? +------------------------------------------------ + +With the right arguments, 'git diff' can also show us the difference +between the working directory and the last commit, or between the +index and the last commit: + +------------------------------------------------ +$ git diff HEAD +diff --git a/file.txt b/file.txt +index a042389..ba3da7b 100644 +--- a/file.txt ++++ b/file.txt +@@ -1 +1,3 @@ + hello world! ++hello world, again ++again? +$ git diff --cached +diff --git a/file.txt b/file.txt +index a042389..513feba 100644 +--- a/file.txt ++++ b/file.txt +@@ -1 +1,2 @@ + hello world! ++hello world, again +------------------------------------------------ + +At any time, we can create a new commit using 'git commit' (without +the "-a" option), and verify that the state committed only includes the +changes stored in the index file, not the additional change that is +still only in our working tree: + +------------------------------------------------ +$ git commit -m "repeat" +$ git diff HEAD +diff --git a/file.txt b/file.txt +index 513feba..ba3da7b 100644 +--- a/file.txt ++++ b/file.txt +@@ -1,2 +1,3 @@ + hello world! + hello world, again ++again? +------------------------------------------------ + +So by default 'git commit' uses the index to create the commit, not +the working tree; the "-a" option to commit tells it to first update +the index with all changes in the working tree. + +Finally, it's worth looking at the effect of 'git add' on the index +file: + +------------------------------------------------ +$ echo "goodbye, world" >closing.txt +$ git add closing.txt +------------------------------------------------ + +The effect of the 'git add' was to add one entry to the index file: + +------------------------------------------------ +$ git ls-files --stage +100644 8b9743b20d4b15be3955fc8d5cd2b09cd2336138 0 closing.txt +100644 513feba2e53ebbd2532419ded848ba19de88ba00 0 file.txt +------------------------------------------------ + +And, as you can see with cat-file, this new entry refers to the +current contents of the file: + +------------------------------------------------ +$ git cat-file blob 8b9743b2 +goodbye, world +------------------------------------------------ + +The "status" command is a useful way to get a quick summary of the +situation: + +------------------------------------------------ +$ git status +On branch master +Changes to be committed: + (use "git reset HEAD <file>..." to unstage) + + new file: closing.txt + +Changes not staged for commit: + (use "git add <file>..." to update what will be committed) + (use "git checkout -- <file>..." to discard changes in working directory) + + modified: file.txt + +------------------------------------------------ + +Since the current state of closing.txt is cached in the index file, +it is listed as "Changes to be committed". Since file.txt has +changes in the working directory that aren't reflected in the index, +it is marked "changed but not updated". At this point, running "git +commit" would create a commit that added closing.txt (with its new +contents), but that didn't modify file.txt. + +Also, note that a bare `git diff` shows the changes to file.txt, but +not the addition of closing.txt, because the version of closing.txt +in the index file is identical to the one in the working directory. + +In addition to being the staging area for new commits, the index file +is also populated from the object database when checking out a +branch, and is used to hold the trees involved in a merge operation. +See linkgit:gitcore-tutorial[7] and the relevant man +pages for details. + +What next? +---------- + +At this point you should know everything necessary to read the man +pages for any of the git commands; one good place to start would be +with the commands mentioned in linkgit:giteveryday[7]. You +should be able to find any unknown jargon in linkgit:gitglossary[7]. + +The link:user-manual.html[Git User's Manual] provides a more +comprehensive introduction to Git. + +linkgit:gitcvs-migration[7] explains how to +import a CVS repository into Git, and shows how to use Git in a +CVS-like way. + +For some interesting examples of Git use, see the +link:howto-index.html[howtos]. + +For Git developers, linkgit:gitcore-tutorial[7] goes +into detail on the lower-level Git mechanisms involved in, for +example, creating a new commit. + +SEE ALSO +-------- +linkgit:gittutorial[7], +linkgit:gitcvs-migration[7], +linkgit:gitcore-tutorial[7], +linkgit:gitglossary[7], +linkgit:git-help[1], +linkgit:giteveryday[7], +link:user-manual.html[The Git User's Manual] + +GIT +--- +Part of the linkgit:git[1] suite. diff --git a/Documentation/gittutorial.txt b/Documentation/gittutorial.txt new file mode 100644 index 0000000..b3b58d3 --- /dev/null +++ b/Documentation/gittutorial.txt @@ -0,0 +1,677 @@ +gittutorial(7) +============== + +NAME +---- +gittutorial - A tutorial introduction to Git + +SYNOPSIS +-------- +[verse] +git * + +DESCRIPTION +----------- + +This tutorial explains how to import a new project into Git, make +changes to it, and share changes with other developers. + +If you are instead primarily interested in using Git to fetch a project, +for example, to test the latest version, you may prefer to start with +the first two chapters of link:user-manual.html[The Git User's Manual]. + +First, note that you can get documentation for a command such as +`git log --graph` with: + +------------------------------------------------ +$ man git-log +------------------------------------------------ + +or: + +------------------------------------------------ +$ git help log +------------------------------------------------ + +With the latter, you can use the manual viewer of your choice; see +linkgit:git-help[1] for more information. + +It is a good idea to introduce yourself to Git with your name and +public email address before doing any operation. The easiest +way to do so is: + +------------------------------------------------ +$ git config --global user.name "Your Name Comes Here" +$ git config --global user.email you@yourdomain.example.com +------------------------------------------------ + + +Importing a new project +----------------------- + +Assume you have a tarball project.tar.gz with your initial work. You +can place it under Git revision control as follows. + +------------------------------------------------ +$ tar xzf project.tar.gz +$ cd project +$ git init +------------------------------------------------ + +Git will reply + +------------------------------------------------ +Initialized empty Git repository in .git/ +------------------------------------------------ + +You've now initialized the working directory--you may notice a new +directory created, named ".git". + +Next, tell Git to take a snapshot of the contents of all files under the +current directory (note the '.'), with 'git add': + +------------------------------------------------ +$ git add . +------------------------------------------------ + +This snapshot is now stored in a temporary staging area which Git calls +the "index". You can permanently store the contents of the index in the +repository with 'git commit': + +------------------------------------------------ +$ git commit +------------------------------------------------ + +This will prompt you for a commit message. You've now stored the first +version of your project in Git. + +Making changes +-------------- + +Modify some files, then add their updated contents to the index: + +------------------------------------------------ +$ git add file1 file2 file3 +------------------------------------------------ + +You are now ready to commit. You can see what is about to be committed +using 'git diff' with the --cached option: + +------------------------------------------------ +$ git diff --cached +------------------------------------------------ + +(Without --cached, 'git diff' will show you any changes that +you've made but not yet added to the index.) You can also get a brief +summary of the situation with 'git status': + +------------------------------------------------ +$ git status +On branch master +Changes to be committed: +Your branch is up-to-date with 'origin/master'. + (use "git reset HEAD <file>..." to unstage) + + modified: file1 + modified: file2 + modified: file3 + +------------------------------------------------ + +If you need to make any further adjustments, do so now, and then add any +newly modified content to the index. Finally, commit your changes with: + +------------------------------------------------ +$ git commit +------------------------------------------------ + +This will again prompt you for a message describing the change, and then +record a new version of the project. + +Alternatively, instead of running 'git add' beforehand, you can use + +------------------------------------------------ +$ git commit -a +------------------------------------------------ + +which will automatically notice any modified (but not new) files, add +them to the index, and commit, all in one step. + +A note on commit messages: Though not required, it's a good idea to +begin the commit message with a single short (less than 50 character) +line summarizing the change, followed by a blank line and then a more +thorough description. The text up to the first blank line in a commit +message is treated as the commit title, and that title is used +throughout Git. For example, linkgit:git-format-patch[1] turns a +commit into email, and it uses the title on the Subject line and the +rest of the commit in the body. + +Git tracks content not files +---------------------------- + +Many revision control systems provide an `add` command that tells the +system to start tracking changes to a new file. Git's `add` command +does something simpler and more powerful: 'git add' is used both for new +and newly modified files, and in both cases it takes a snapshot of the +given files and stages that content in the index, ready for inclusion in +the next commit. + +Viewing project history +----------------------- + +At any point you can view the history of your changes using + +------------------------------------------------ +$ git log +------------------------------------------------ + +If you also want to see complete diffs at each step, use + +------------------------------------------------ +$ git log -p +------------------------------------------------ + +Often the overview of the change is useful to get a feel of +each step + +------------------------------------------------ +$ git log --stat --summary +------------------------------------------------ + +Managing branches +----------------- + +A single Git repository can maintain multiple branches of +development. To create a new branch named "experimental", use + +------------------------------------------------ +$ git branch experimental +------------------------------------------------ + +If you now run + +------------------------------------------------ +$ git branch +------------------------------------------------ + +you'll get a list of all existing branches: + +------------------------------------------------ + experimental +* master +------------------------------------------------ + +The "experimental" branch is the one you just created, and the +"master" branch is a default branch that was created for you +automatically. The asterisk marks the branch you are currently on; +type + +------------------------------------------------ +$ git checkout experimental +------------------------------------------------ + +to switch to the experimental branch. Now edit a file, commit the +change, and switch back to the master branch: + +------------------------------------------------ +(edit file) +$ git commit -a +$ git checkout master +------------------------------------------------ + +Check that the change you made is no longer visible, since it was +made on the experimental branch and you're back on the master branch. + +You can make a different change on the master branch: + +------------------------------------------------ +(edit file) +$ git commit -a +------------------------------------------------ + +at this point the two branches have diverged, with different changes +made in each. To merge the changes made in experimental into master, run + +------------------------------------------------ +$ git merge experimental +------------------------------------------------ + +If the changes don't conflict, you're done. If there are conflicts, +markers will be left in the problematic files showing the conflict; + +------------------------------------------------ +$ git diff +------------------------------------------------ + +will show this. Once you've edited the files to resolve the +conflicts, + +------------------------------------------------ +$ git commit -a +------------------------------------------------ + +will commit the result of the merge. Finally, + +------------------------------------------------ +$ gitk +------------------------------------------------ + +will show a nice graphical representation of the resulting history. + +At this point you could delete the experimental branch with + +------------------------------------------------ +$ git branch -d experimental +------------------------------------------------ + +This command ensures that the changes in the experimental branch are +already in the current branch. + +If you develop on a branch crazy-idea, then regret it, you can always +delete the branch with + +------------------------------------- +$ git branch -D crazy-idea +------------------------------------- + +Branches are cheap and easy, so this is a good way to try something +out. + +Using Git for collaboration +--------------------------- + +Suppose that Alice has started a new project with a Git repository in +/home/alice/project, and that Bob, who has a home directory on the +same machine, wants to contribute. + +Bob begins with: + +------------------------------------------------ +bob$ git clone /home/alice/project myrepo +------------------------------------------------ + +This creates a new directory "myrepo" containing a clone of Alice's +repository. The clone is on an equal footing with the original +project, possessing its own copy of the original project's history. + +Bob then makes some changes and commits them: + +------------------------------------------------ +(edit files) +bob$ git commit -a +(repeat as necessary) +------------------------------------------------ + +When he's ready, he tells Alice to pull changes from the repository +at /home/bob/myrepo. She does this with: + +------------------------------------------------ +alice$ cd /home/alice/project +alice$ git pull /home/bob/myrepo master +------------------------------------------------ + +This merges the changes from Bob's "master" branch into Alice's +current branch. If Alice has made her own changes in the meantime, +then she may need to manually fix any conflicts. + +The "pull" command thus performs two operations: it fetches changes +from a remote branch, then merges them into the current branch. + +Note that in general, Alice would want her local changes committed before +initiating this "pull". If Bob's work conflicts with what Alice did since +their histories forked, Alice will use her working tree and the index to +resolve conflicts, and existing local changes will interfere with the +conflict resolution process (Git will still perform the fetch but will +refuse to merge --- Alice will have to get rid of her local changes in +some way and pull again when this happens). + +Alice can peek at what Bob did without merging first, using the "fetch" +command; this allows Alice to inspect what Bob did, using a special +symbol "FETCH_HEAD", in order to determine if he has anything worth +pulling, like this: + +------------------------------------------------ +alice$ git fetch /home/bob/myrepo master +alice$ git log -p HEAD..FETCH_HEAD +------------------------------------------------ + +This operation is safe even if Alice has uncommitted local changes. +The range notation "HEAD..FETCH_HEAD" means "show everything that is reachable +from the FETCH_HEAD but exclude anything that is reachable from HEAD". +Alice already knows everything that leads to her current state (HEAD), +and reviews what Bob has in his state (FETCH_HEAD) that she has not +seen with this command. + +If Alice wants to visualize what Bob did since their histories forked +she can issue the following command: + +------------------------------------------------ +$ gitk HEAD..FETCH_HEAD +------------------------------------------------ + +This uses the same two-dot range notation we saw earlier with 'git log'. + +Alice may want to view what both of them did since they forked. +She can use three-dot form instead of the two-dot form: + +------------------------------------------------ +$ gitk HEAD...FETCH_HEAD +------------------------------------------------ + +This means "show everything that is reachable from either one, but +exclude anything that is reachable from both of them". + +Please note that these range notation can be used with both gitk +and "git log". + +After inspecting what Bob did, if there is nothing urgent, Alice may +decide to continue working without pulling from Bob. If Bob's history +does have something Alice would immediately need, Alice may choose to +stash her work-in-progress first, do a "pull", and then finally unstash +her work-in-progress on top of the resulting history. + +When you are working in a small closely knit group, it is not +unusual to interact with the same repository over and over +again. By defining 'remote' repository shorthand, you can make +it easier: + +------------------------------------------------ +alice$ git remote add bob /home/bob/myrepo +------------------------------------------------ + +With this, Alice can perform the first part of the "pull" operation +alone using the 'git fetch' command without merging them with her own +branch, using: + +------------------------------------- +alice$ git fetch bob +------------------------------------- + +Unlike the longhand form, when Alice fetches from Bob using a +remote repository shorthand set up with 'git remote', what was +fetched is stored in a remote-tracking branch, in this case +`bob/master`. So after this: + +------------------------------------- +alice$ git log -p master..bob/master +------------------------------------- + +shows a list of all the changes that Bob made since he branched from +Alice's master branch. + +After examining those changes, Alice +could merge the changes into her master branch: + +------------------------------------- +alice$ git merge bob/master +------------------------------------- + +This `merge` can also be done by 'pulling from her own remote-tracking +branch', like this: + +------------------------------------- +alice$ git pull . remotes/bob/master +------------------------------------- + +Note that git pull always merges into the current branch, +regardless of what else is given on the command line. + +Later, Bob can update his repo with Alice's latest changes using + +------------------------------------- +bob$ git pull +------------------------------------- + +Note that he doesn't need to give the path to Alice's repository; +when Bob cloned Alice's repository, Git stored the location of her +repository in the repository configuration, and that location is +used for pulls: + +------------------------------------- +bob$ git config --get remote.origin.url +/home/alice/project +------------------------------------- + +(The complete configuration created by 'git clone' is visible using +`git config -l`, and the linkgit:git-config[1] man page +explains the meaning of each option.) + +Git also keeps a pristine copy of Alice's master branch under the +name "origin/master": + +------------------------------------- +bob$ git branch -r + origin/master +------------------------------------- + +If Bob later decides to work from a different host, he can still +perform clones and pulls using the ssh protocol: + +------------------------------------- +bob$ git clone alice.org:/home/alice/project myrepo +------------------------------------- + +Alternatively, Git has a native protocol, or can use http; +see linkgit:git-pull[1] for details. + +Git can also be used in a CVS-like mode, with a central repository +that various users push changes to; see linkgit:git-push[1] and +linkgit:gitcvs-migration[7]. + +Exploring history +----------------- + +Git history is represented as a series of interrelated commits. We +have already seen that the 'git log' command can list those commits. +Note that first line of each git log entry also gives a name for the +commit: + +------------------------------------- +$ git log +commit c82a22c39cbc32576f64f5c6b3f24b99ea8149c7 +Author: Junio C Hamano <junkio@cox.net> +Date: Tue May 16 17:18:22 2006 -0700 + + merge-base: Clarify the comments on post processing. +------------------------------------- + +We can give this name to 'git show' to see the details about this +commit. + +------------------------------------- +$ git show c82a22c39cbc32576f64f5c6b3f24b99ea8149c7 +------------------------------------- + +But there are other ways to refer to commits. You can use any initial +part of the name that is long enough to uniquely identify the commit: + +------------------------------------- +$ git show c82a22c39c # the first few characters of the name are + # usually enough +$ git show HEAD # the tip of the current branch +$ git show experimental # the tip of the "experimental" branch +------------------------------------- + +Every commit usually has one "parent" commit +which points to the previous state of the project: + +------------------------------------- +$ git show HEAD^ # to see the parent of HEAD +$ git show HEAD^^ # to see the grandparent of HEAD +$ git show HEAD~4 # to see the great-great grandparent of HEAD +------------------------------------- + +Note that merge commits may have more than one parent: + +------------------------------------- +$ git show HEAD^1 # show the first parent of HEAD (same as HEAD^) +$ git show HEAD^2 # show the second parent of HEAD +------------------------------------- + +You can also give commits names of your own; after running + +------------------------------------- +$ git tag v2.5 1b2e1d63ff +------------------------------------- + +you can refer to 1b2e1d63ff by the name "v2.5". If you intend to +share this name with other people (for example, to identify a release +version), you should create a "tag" object, and perhaps sign it; see +linkgit:git-tag[1] for details. + +Any Git command that needs to know a commit can take any of these +names. For example: + +------------------------------------- +$ git diff v2.5 HEAD # compare the current HEAD to v2.5 +$ git branch stable v2.5 # start a new branch named "stable" based + # at v2.5 +$ git reset --hard HEAD^ # reset your current branch and working + # directory to its state at HEAD^ +------------------------------------- + +Be careful with that last command: in addition to losing any changes +in the working directory, it will also remove all later commits from +this branch. If this branch is the only branch containing those +commits, they will be lost. Also, don't use 'git reset' on a +publicly-visible branch that other developers pull from, as it will +force needless merges on other developers to clean up the history. +If you need to undo changes that you have pushed, use 'git revert' +instead. + +The 'git grep' command can search for strings in any version of your +project, so + +------------------------------------- +$ git grep "hello" v2.5 +------------------------------------- + +searches for all occurrences of "hello" in v2.5. + +If you leave out the commit name, 'git grep' will search any of the +files it manages in your current directory. So + +------------------------------------- +$ git grep "hello" +------------------------------------- + +is a quick way to search just the files that are tracked by Git. + +Many Git commands also take sets of commits, which can be specified +in a number of ways. Here are some examples with 'git log': + +------------------------------------- +$ git log v2.5..v2.6 # commits between v2.5 and v2.6 +$ git log v2.5.. # commits since v2.5 +$ git log --since="2 weeks ago" # commits from the last 2 weeks +$ git log v2.5.. Makefile # commits since v2.5 which modify + # Makefile +------------------------------------- + +You can also give 'git log' a "range" of commits where the first is not +necessarily an ancestor of the second; for example, if the tips of +the branches "stable" and "master" diverged from a common +commit some time ago, then + +------------------------------------- +$ git log stable..master +------------------------------------- + +will list commits made in the master branch but not in the +stable branch, while + +------------------------------------- +$ git log master..stable +------------------------------------- + +will show the list of commits made on the stable branch but not +the master branch. + +The 'git log' command has a weakness: it must present commits in a +list. When the history has lines of development that diverged and +then merged back together, the order in which 'git log' presents +those commits is meaningless. + +Most projects with multiple contributors (such as the Linux kernel, +or Git itself) have frequent merges, and 'gitk' does a better job of +visualizing their history. For example, + +------------------------------------- +$ gitk --since="2 weeks ago" drivers/ +------------------------------------- + +allows you to browse any commits from the last 2 weeks of commits +that modified files under the "drivers" directory. (Note: you can +adjust gitk's fonts by holding down the control key while pressing +"-" or "+".) + +Finally, most commands that take filenames will optionally allow you +to precede any filename by a commit, to specify a particular version +of the file: + +------------------------------------- +$ git diff v2.5:Makefile HEAD:Makefile.in +------------------------------------- + +You can also use 'git show' to see any such file: + +------------------------------------- +$ git show v2.5:Makefile +------------------------------------- + +Next Steps +---------- + +This tutorial should be enough to perform basic distributed revision +control for your projects. However, to fully understand the depth +and power of Git you need to understand two simple ideas on which it +is based: + + * The object database is the rather elegant system used to + store the history of your project--files, directories, and + commits. + + * The index file is a cache of the state of a directory tree, + used to create commits, check out working directories, and + hold the various trees involved in a merge. + +Part two of this tutorial explains the object +database, the index file, and a few other odds and ends that you'll +need to make the most of Git. You can find it at linkgit:gittutorial-2[7]. + +If you don't want to continue with that right away, a few other +digressions that may be interesting at this point are: + + * linkgit:git-format-patch[1], linkgit:git-am[1]: These convert + series of git commits into emailed patches, and vice versa, + useful for projects such as the Linux kernel which rely heavily + on emailed patches. + + * linkgit:git-bisect[1]: When there is a regression in your + project, one way to track down the bug is by searching through + the history to find the exact commit that's to blame. Git bisect + can help you perform a binary search for that commit. It is + smart enough to perform a close-to-optimal search even in the + case of complex non-linear history with lots of merged branches. + + * linkgit:gitworkflows[7]: Gives an overview of recommended + workflows. + + * linkgit:giteveryday[7]: Everyday Git with 20 Commands Or So. + + * linkgit:gitcvs-migration[7]: Git for CVS users. + +SEE ALSO +-------- +linkgit:gittutorial-2[7], +linkgit:gitcvs-migration[7], +linkgit:gitcore-tutorial[7], +linkgit:gitglossary[7], +linkgit:git-help[1], +linkgit:gitworkflows[7], +linkgit:giteveryday[7], +link:user-manual.html[The Git User's Manual] + +GIT +--- +Part of the linkgit:git[1] suite. diff --git a/Documentation/gitweb.conf.txt b/Documentation/gitweb.conf.txt new file mode 100644 index 0000000..8a42270 --- /dev/null +++ b/Documentation/gitweb.conf.txt @@ -0,0 +1,958 @@ +gitweb.conf(5) +============== + +NAME +---- +gitweb.conf - Gitweb (Git web interface) configuration file + +SYNOPSIS +-------- +/etc/gitweb.conf, /etc/gitweb-common.conf, $GITWEBDIR/gitweb_config.perl + +DESCRIPTION +----------- + +The gitweb CGI script for viewing Git repositories over the web uses a +perl script fragment as its configuration file. You can set variables +using "`our $variable = value`"; text from a "#" character until the +end of a line is ignored. See *perlsyn*(1) for details. + +An example: + + # gitweb configuration file for http://git.example.org + # + our $projectroot = "/srv/git"; # FHS recommendation + our $site_name = 'Example.org >> Repos'; + + +The configuration file is used to override the default settings that +were built into gitweb at the time the 'gitweb.cgi' script was generated. + +While one could just alter the configuration settings in the gitweb +CGI itself, those changes would be lost upon upgrade. Configuration +settings might also be placed into a file in the same directory as the +CGI script with the default name 'gitweb_config.perl' -- allowing +one to have multiple gitweb instances with different configurations by +the use of symlinks. + +Note that some configuration can be controlled on per-repository rather than +gitweb-wide basis: see "Per-repository gitweb configuration" subsection on +linkgit:gitweb[1] manpage. + + +DISCUSSION +---------- +Gitweb reads configuration data from the following sources in the +following order: + + * built-in values (some set during build stage), + + * common system-wide configuration file (defaults to + '/etc/gitweb-common.conf'), + + * either per-instance configuration file (defaults to 'gitweb_config.perl' + in the same directory as the installed gitweb), or if it does not exists + then fallback system-wide configuration file (defaults to '/etc/gitweb.conf'). + +Values obtained in later configuration files override values obtained earlier +in the above sequence. + +Locations of the common system-wide configuration file, the fallback +system-wide configuration file and the per-instance configuration file +are defined at compile time using build-time Makefile configuration +variables, respectively `GITWEB_CONFIG_COMMON`, `GITWEB_CONFIG_SYSTEM` +and `GITWEB_CONFIG`. + +You can also override locations of gitweb configuration files during +runtime by setting the following environment variables: +`GITWEB_CONFIG_COMMON`, `GITWEB_CONFIG_SYSTEM` and `GITWEB_CONFIG` +to a non-empty value. + + +The syntax of the configuration files is that of Perl, since these files are +handled by sourcing them as fragments of Perl code (the language that +gitweb itself is written in). Variables are typically set using the +`our` qualifier (as in "`our $variable = <value>;`") to avoid syntax +errors if a new version of gitweb no longer uses a variable and therefore +stops declaring it. + +You can include other configuration file using read_config_file() +subroutine. For example, one might want to put gitweb configuration +related to access control for viewing repositories via Gitolite (one +of Git repository management tools) in a separate file, e.g. in +'/etc/gitweb-gitolite.conf'. To include it, put + +-------------------------------------------------- +read_config_file("/etc/gitweb-gitolite.conf"); +-------------------------------------------------- + +somewhere in gitweb configuration file used, e.g. in per-installation +gitweb configuration file. Note that read_config_file() checks itself +that the file it reads exists, and does nothing if it is not found. +It also handles errors in included file. + + +The default configuration with no configuration file at all may work +perfectly well for some installations. Still, a configuration file is +useful for customizing or tweaking the behavior of gitweb in many ways, and +some optional features will not be present unless explicitly enabled using +the configurable `%features` variable (see also "Configuring gitweb +features" section below). + + +CONFIGURATION VARIABLES +----------------------- +Some configuration variables have their default values (embedded in the CGI +script) set during building gitweb -- if that is the case, this fact is put +in their description. See gitweb's 'INSTALL' file for instructions on building +and installing gitweb. + + +Location of repositories +~~~~~~~~~~~~~~~~~~~~~~~~ +The configuration variables described below control how gitweb finds +Git repositories, and how repositories are displayed and accessed. + +See also "Repositories" and later subsections in linkgit:gitweb[1] manpage. + +$projectroot:: + Absolute filesystem path which will be prepended to project path; + the path to repository is `$projectroot/$project`. Set to + `$GITWEB_PROJECTROOT` during installation. This variable has to be + set correctly for gitweb to find repositories. ++ +For example, if `$projectroot` is set to "/srv/git" by putting the following +in gitweb config file: ++ +---------------------------------------------------------------------------- +our $projectroot = "/srv/git"; +---------------------------------------------------------------------------- ++ +then ++ +------------------------------------------------ +http://git.example.com/gitweb.cgi?p=foo/bar.git +------------------------------------------------ ++ +and its path_info based equivalent ++ +------------------------------------------------ +http://git.example.com/gitweb.cgi/foo/bar.git +------------------------------------------------ ++ +will map to the path '/srv/git/foo/bar.git' on the filesystem. + +$projects_list:: + Name of a plain text file listing projects, or a name of directory + to be scanned for projects. ++ +Project list files should list one project per line, with each line +having the following format ++ +----------------------------------------------------------------------------- +<URI-encoded filesystem path to repository> SP <URI-encoded repository owner> +----------------------------------------------------------------------------- ++ +The default value of this variable is determined by the `GITWEB_LIST` +makefile variable at installation time. If this variable is empty, gitweb +will fall back to scanning the `$projectroot` directory for repositories. + +$project_maxdepth:: + If `$projects_list` variable is unset, gitweb will recursively + scan filesystem for Git repositories. The `$project_maxdepth` + is used to limit traversing depth, relative to `$projectroot` + (starting point); it means that directories which are further + from `$projectroot` than `$project_maxdepth` will be skipped. ++ +It is purely performance optimization, originally intended for MacOS X, +where recursive directory traversal is slow. Gitweb follows symbolic +links, but it detects cycles, ignoring any duplicate files and directories. ++ +The default value of this variable is determined by the build-time +configuration variable `GITWEB_PROJECT_MAXDEPTH`, which defaults to +2007. + +$export_ok:: + Show repository only if this file exists (in repository). Only + effective if this variable evaluates to true. Can be set when + building gitweb by setting `GITWEB_EXPORT_OK`. This path is + relative to `GIT_DIR`. git-daemon[1] uses 'git-daemon-export-ok', + unless started with `--export-all`. By default this variable is + not set, which means that this feature is turned off. + +$export_auth_hook:: + Function used to determine which repositories should be shown. + This subroutine should take one parameter, the full path to + a project, and if it returns true, that project will be included + in the projects list and can be accessed through gitweb as long + as it fulfills the other requirements described by $export_ok, + $projects_list, and $projects_maxdepth. Example: ++ +---------------------------------------------------------------------------- +our $export_auth_hook = sub { return -e "$_[0]/git-daemon-export-ok"; }; +---------------------------------------------------------------------------- ++ +though the above might be done by using `$export_ok` instead ++ +---------------------------------------------------------------------------- +our $export_ok = "git-daemon-export-ok"; +---------------------------------------------------------------------------- ++ +If not set (default), it means that this feature is disabled. ++ +See also more involved example in "Controlling access to Git repositories" +subsection on linkgit:gitweb[1] manpage. + +$strict_export:: + Only allow viewing of repositories also shown on the overview page. + This for example makes `$gitweb_export_ok` file decide if repository is + available and not only if it is shown. If `$gitweb_list` points to + file with list of project, only those repositories listed would be + available for gitweb. Can be set during building gitweb via + `GITWEB_STRICT_EXPORT`. By default this variable is not set, which + means that you can directly access those repositories that are hidden + from projects list page (e.g. the are not listed in the $projects_list + file). + + +Finding files +~~~~~~~~~~~~~ +The following configuration variables tell gitweb where to find files. +The values of these variables are paths on the filesystem. + +$GIT:: + Core git executable to use. By default set to `$GIT_BINDIR/git`, which + in turn is by default set to `$(bindir)/git`. If you use Git installed + from a binary package, you should usually set this to "/usr/bin/git". + This can just be "git" if your web server has a sensible PATH; from + security point of view it is better to use absolute path to git binary. + If you have multiple Git versions installed it can be used to choose + which one to use. Must be (correctly) set for gitweb to be able to + work. + +$mimetypes_file:: + File to use for (filename extension based) guessing of MIME types before + trying '/etc/mime.types'. *NOTE* that this path, if relative, is taken + as relative to the current Git repository, not to CGI script. If unset, + only '/etc/mime.types' is used (if present on filesystem). If no mimetypes + file is found, mimetype guessing based on extension of file is disabled. + Unset by default. + +$highlight_bin:: + Path to the highlight executable to use (it must be the one from + http://www.andre-simon.de[] due to assumptions about parameters and output). + By default set to 'highlight'; set it to full path to highlight + executable if it is not installed on your web server's PATH. + Note that 'highlight' feature must be set for gitweb to actually + use syntax highlighting. ++ +*NOTE*: if you want to add support for new file type (supported by +"highlight" but not used by gitweb), you need to modify `%highlight_ext` +or `%highlight_basename`, depending on whether you detect type of file +based on extension (for example "sh") or on its basename (for example +"Makefile"). The keys of these hashes are extension and basename, +respectively, and value for given key is name of syntax to be passed via +`--syntax <syntax>` to highlighter. ++ +For example if repositories you are hosting use "phtml" extension for +PHP files, and you want to have correct syntax-highlighting for those +files, you can add the following to gitweb configuration: ++ +--------------------------------------------------------- +our %highlight_ext; +$highlight_ext{'phtml'} = 'php'; +--------------------------------------------------------- + + +Links and their targets +~~~~~~~~~~~~~~~~~~~~~~~ +The configuration variables described below configure some of gitweb links: +their target and their look (text or image), and where to find page +prerequisites (stylesheet, favicon, images, scripts). Usually they are left +at their default values, with the possible exception of `@stylesheets` +variable. + +@stylesheets:: + List of URIs of stylesheets (relative to the base URI of a page). You + might specify more than one stylesheet, for example to use "gitweb.css" + as base with site specific modifications in a separate stylesheet + to make it easier to upgrade gitweb. For example, you can add + a `site` stylesheet by putting ++ +---------------------------------------------------------------------------- +push @stylesheets, "gitweb-site.css"; +---------------------------------------------------------------------------- ++ +in the gitweb config file. Those values that are relative paths are +relative to base URI of gitweb. ++ +This list should contain the URI of gitweb's standard stylesheet. The default +URI of gitweb stylesheet can be set at build time using the `GITWEB_CSS` +makefile variable. Its default value is 'static/gitweb.css' +(or 'static/gitweb.min.css' if the `CSSMIN` variable is defined, +i.e. if CSS minifier is used during build). ++ +*Note*: there is also a legacy `$stylesheet` configuration variable, which was +used by older gitweb. If `$stylesheet` variable is defined, only CSS stylesheet +given by this variable is used by gitweb. + +$logo:: + Points to the location where you put 'git-logo.png' on your web + server, or to be more the generic URI of logo, 72x27 size). This image + is displayed in the top right corner of each gitweb page and used as + a logo for the Atom feed. Relative to the base URI of gitweb (as a path). + Can be adjusted when building gitweb using `GITWEB_LOGO` variable + By default set to 'static/git-logo.png'. + +$favicon:: + Points to the location where you put 'git-favicon.png' on your web + server, or to be more the generic URI of favicon, which will be served + as "image/png" type. Web browsers that support favicons (website icons) + may display them in the browser's URL bar and next to the site name in + bookmarks. Relative to the base URI of gitweb. Can be adjusted at + build time using `GITWEB_FAVICON` variable. + By default set to 'static/git-favicon.png'. + +$javascript:: + Points to the location where you put 'gitweb.js' on your web server, + or to be more generic the URI of JavaScript code used by gitweb. + Relative to the base URI of gitweb. Can be set at build time using + the `GITWEB_JS` build-time configuration variable. ++ +The default value is either 'static/gitweb.js', or 'static/gitweb.min.js' if +the `JSMIN` build variable was defined, i.e. if JavaScript minifier was used +at build time. *Note* that this single file is generated from multiple +individual JavaScript "modules". + +$home_link:: + Target of the home link on the top of all pages (the first part of view + "breadcrumbs"). By default it is set to the absolute URI of a current page + (to the value of `$my_uri` variable, or to "/" if `$my_uri` is undefined + or is an empty string). + +$home_link_str:: + Label for the "home link" at the top of all pages, leading to `$home_link` + (usually the main gitweb page, which contains the projects list). It is + used as the first component of gitweb's "breadcrumb trail": + `<home link> / <project> / <action>`. Can be set at build time using + the `GITWEB_HOME_LINK_STR` variable. By default it is set to "projects", + as this link leads to the list of projects. Another popular choice is to + set it to the name of site. Note that it is treated as raw HTML so it + should not be set from untrusted sources. + +@extra_breadcrumbs:: + Additional links to be added to the start of the breadcrumb trail before + the home link, to pages that are logically "above" the gitweb projects + list, such as the organization and department which host the gitweb + server. Each element of the list is a reference to an array, in which + element 0 is the link text (equivalent to `$home_link_str`) and element + 1 is the target URL (equivalent to `$home_link`). ++ +For example, the following setting produces a breadcrumb trail like +"home / dev / projects / ..." where "projects" is the home link. +---------------------------------------------------------------------------- + our @extra_breadcrumbs = ( + [ 'home' => 'https://www.example.org/' ], + [ 'dev' => 'https://dev.example.org/' ], + ); +---------------------------------------------------------------------------- + +$logo_url:: +$logo_label:: + URI and label (title) for the Git logo link (or your site logo, + if you chose to use different logo image). By default, these both + refer to Git homepage, http://git-scm.com[]; in the past, they pointed + to Git documentation at http://www.kernel.org[]. + + +Changing gitweb's look +~~~~~~~~~~~~~~~~~~~~~~ +You can adjust how pages generated by gitweb look using the variables described +below. You can change the site name, add common headers and footers for all +pages, and add a description of this gitweb installation on its main page +(which is the projects list page), etc. + +$site_name:: + Name of your site or organization, to appear in page titles. Set it + to something descriptive for clearer bookmarks etc. If this variable + is not set or is, then gitweb uses the value of the `SERVER_NAME` + CGI environment variable, setting site name to "$SERVER_NAME Git", + or "Untitled Git" if this variable is not set (e.g. if running gitweb + as standalone script). ++ +Can be set using the `GITWEB_SITENAME` at build time. Unset by default. + +$site_html_head_string:: + HTML snippet to be included in the <head> section of each page. + Can be set using `GITWEB_SITE_HTML_HEAD_STRING` at build time. + No default value. + +$site_header:: + Name of a file with HTML to be included at the top of each page. + Relative to the directory containing the 'gitweb.cgi' script. + Can be set using `GITWEB_SITE_HEADER` at build time. No default + value. + +$site_footer:: + Name of a file with HTML to be included at the bottom of each page. + Relative to the directory containing the 'gitweb.cgi' script. + Can be set using `GITWEB_SITE_FOOTER` at build time. No default + value. + +$home_text:: + Name of a HTML file which, if it exists, is included on the + gitweb projects overview page ("projects_list" view). Relative to + the directory containing the gitweb.cgi script. Default value + can be adjusted during build time using `GITWEB_HOMETEXT` variable. + By default set to 'indextext.html'. + +$projects_list_description_width:: + The width (in characters) of the "Description" column of the projects list. + Longer descriptions will be truncated (trying to cut at word boundary); + the full description is available in the 'title' attribute (usually shown on + mouseover). The default is 25, which might be too small if you + use long project descriptions. + +$default_projects_order:: + Default value of ordering of projects on projects list page, which + means the ordering used if you don't explicitly sort projects list + (if there is no "o" CGI query parameter in the URL). Valid values + are "none" (unsorted), "project" (projects are by project name, + i.e. path to repository relative to `$projectroot`), "descr" + (project description), "owner", and "age" (by date of most current + commit). ++ +Default value is "project". Unknown value means unsorted. + + +Changing gitweb's behavior +~~~~~~~~~~~~~~~~~~~~~~~~~~ +These configuration variables control _internal_ gitweb behavior. + +$default_blob_plain_mimetype:: + Default mimetype for the blob_plain (raw) view, if mimetype checking + doesn't result in some other type; by default "text/plain". + Gitweb guesses mimetype of a file to display based on extension + of its filename, using `$mimetypes_file` (if set and file exists) + and '/etc/mime.types' files (see *mime.types*(5) manpage; only + filename extension rules are supported by gitweb). + +$default_text_plain_charset:: + Default charset for text files. If this is not set, the web server + configuration will be used. Unset by default. + +$fallback_encoding:: + Gitweb assumes this charset when a line contains non-UTF-8 characters. + The fallback decoding is used without error checking, so it can be even + "utf-8". The value must be a valid encoding; see the *Encoding::Supported*(3pm) + man page for a list. The default is "latin1", aka. "iso-8859-1". + +@diff_opts:: + Rename detection options for git-diff and git-diff-tree. The default is + (\'-M'); set it to (\'-C') or (\'-C', \'-C') to also detect copies, + or set it to () i.e. empty list if you don't want to have renames + detection. ++ +*Note* that rename and especially copy detection can be quite +CPU-intensive. Note also that non Git tools can have problems with +patches generated with options mentioned above, especially when they +involve file copies (\'-C') or criss-cross renames (\'-B'). + + +Some optional features and policies +~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ +Most of features are configured via `%feature` hash; however some of extra +gitweb features can be turned on and configured using variables described +below. This list beside configuration variables that control how gitweb +looks does contain variables configuring administrative side of gitweb +(e.g. cross-site scripting prevention; admittedly this as side effect +affects how "summary" pages look like, or load limiting). + +@git_base_url_list:: + List of Git base URLs. These URLs are used to generate URLs + describing from where to fetch a project, which are shown on + project summary page. The full fetch URL is "`$git_base_url/$project`", + for each element of this list. You can set up multiple base URLs + (for example one for `git://` protocol, and one for `http://` + protocol). ++ +Note that per repository configuration can be set in '$GIT_DIR/cloneurl' +file, or as values of multi-value `gitweb.url` configuration variable in +project config. Per-repository configuration takes precedence over value +composed from `@git_base_url_list` elements and project name. ++ +You can setup one single value (single entry/item in this list) at build +time by setting the `GITWEB_BASE_URL` build-time configuration variable. +By default it is set to (), i.e. an empty list. This means that gitweb +would not try to create project URL (to fetch) from project name. + +$projects_list_group_categories:: + Whether to enable the grouping of projects by category on the project + list page. The category of a project is determined by the + `$GIT_DIR/category` file or the `gitweb.category` variable in each + repository's configuration. Disabled by default (set to 0). + +$project_list_default_category:: + Default category for projects for which none is specified. If this is + set to the empty string, such projects will remain uncategorized and + listed at the top, above categorized projects. Used only if project + categories are enabled, which means if `$projects_list_group_categories` + is true. By default set to "" (empty string). + +$prevent_xss:: + If true, some gitweb features are disabled to prevent content in + repositories from launching cross-site scripting (XSS) attacks. Set this + to true if you don't trust the content of your repositories. + False by default (set to 0). + +$maxload:: + Used to set the maximum load that we will still respond to gitweb queries. + If the server load exceeds this value then gitweb will return + "503 Service Unavailable" error. The server load is taken to be 0 + if gitweb cannot determine its value. Currently it works only on Linux, + where it uses '/proc/loadavg'; the load there is the number of active + tasks on the system -- processes that are actually running -- averaged + over the last minute. ++ +Set `$maxload` to undefined value (`undef`) to turn this feature off. +The default value is 300. + +$omit_age_column:: + If true, omit the column with date of the most current commit on the + projects list page. It can save a bit of I/O and a fork per repository. + +$omit_owner:: + If true prevents displaying information about repository owner. + +$per_request_config:: + If this is set to code reference, it will be run once for each request. + You can set parts of configuration that change per session this way. + For example, one might use the following code in a gitweb configuration + file ++ +-------------------------------------------------------------------------------- +our $per_request_config = sub { + $ENV{GL_USER} = $cgi->remote_user || "gitweb"; +}; +-------------------------------------------------------------------------------- ++ +If `$per_request_config` is not a code reference, it is interpreted as boolean +value. If it is true gitweb will process config files once per request, +and if it is false gitweb will process config files only once, each time it +is executed. True by default (set to 1). ++ +*NOTE*: `$my_url`, `$my_uri`, and `$base_url` are overwritten with their default +values before every request, so if you want to change them, be sure to set +this variable to true or a code reference effecting the desired changes. ++ +This variable matters only when using persistent web environments that +serve multiple requests using single gitweb instance, like mod_perl, +FastCGI or Plackup. + + +Other variables +~~~~~~~~~~~~~~~ +Usually you should not need to change (adjust) any of configuration +variables described below; they should be automatically set by gitweb to +correct value. + + +$version:: + Gitweb version, set automatically when creating gitweb.cgi from + gitweb.perl. You might want to modify it if you are running modified + gitweb, for example ++ +--------------------------------------------------- +our $version .= " with caching"; +--------------------------------------------------- ++ +if you run modified version of gitweb with caching support. This variable +is purely informational, used e.g. in the "generator" meta header in HTML +header. + +$my_url:: +$my_uri:: + Full URL and absolute URL of the gitweb script; + in earlier versions of gitweb you might have need to set those + variables, but now there should be no need to do it. See + `$per_request_config` if you need to set them still. + +$base_url:: + Base URL for relative URLs in pages generated by gitweb, + (e.g. `$logo`, `$favicon`, `@stylesheets` if they are relative URLs), + needed and used '<base href="$base_url">' only for URLs with nonempty + PATH_INFO. Usually gitweb sets its value correctly, + and there is no need to set this variable, e.g. to $my_uri or "/". + See `$per_request_config` if you need to override it anyway. + + +CONFIGURING GITWEB FEATURES +--------------------------- +Many gitweb features can be enabled (or disabled) and configured using the +`%feature` hash. Names of gitweb features are keys of this hash. + +Each `%feature` hash element is a hash reference and has the following +structure: +---------------------------------------------------------------------- +"<feature_name>" => { + "sub" => <feature-sub (subroutine)>, + "override" => <allow-override (boolean)>, + "default" => [ <options>... ] +}, +---------------------------------------------------------------------- +Some features cannot be overridden per project. For those +features the structure of appropriate `%feature` hash element has a simpler +form: +---------------------------------------------------------------------- +"<feature_name>" => { + "override" => 0, + "default" => [ <options>... ] +}, +---------------------------------------------------------------------- +As one can see it lacks the \'sub' element. + +The meaning of each part of feature configuration is described +below: + +default:: + List (array reference) of feature parameters (if there are any), + used also to toggle (enable or disable) given feature. ++ +Note that it is currently *always* an array reference, even if +feature doesn't accept any configuration parameters, and \'default' +is used only to turn it on or off. In such case you turn feature on +by setting this element to `[1]`, and torn it off by setting it to +`[0]`. See also the passage about the "blame" feature in the "Examples" +section. ++ +To disable features that accept parameters (are configurable), you +need to set this element to empty list i.e. `[]`. + +override:: + If this field has a true value then the given feature is + overridable, which means that it can be configured + (or enabled/disabled) on a per-repository basis. ++ +Usually given "<feature>" is configurable via the `gitweb.<feature>` +config variable in the per-repository Git configuration file. ++ +*Note* that no feature is overridable by default. + +sub:: + Internal detail of implementation. What is important is that + if this field is not present then per-repository override for + given feature is not supported. ++ +You wouldn't need to ever change it in gitweb config file. + + +Features in `%feature` +~~~~~~~~~~~~~~~~~~~~~~ +The gitweb features that are configurable via `%feature` hash are listed +below. This should be a complete list, but ultimately the authoritative +and complete list is in gitweb.cgi source code, with features described +in the comments. + +blame:: + Enable the "blame" and "blame_incremental" blob views, showing for + each line the last commit that modified it; see linkgit:git-blame[1]. + This can be very CPU-intensive and is therefore disabled by default. ++ +This feature can be configured on a per-repository basis via +repository's `gitweb.blame` configuration variable (boolean). + +snapshot:: + Enable and configure the "snapshot" action, which allows user to + download a compressed archive of any tree or commit, as produced + by linkgit:git-archive[1] and possibly additionally compressed. + This can potentially generate high traffic if you have large project. ++ +The value of \'default' is a list of names of snapshot formats, +defined in `%known_snapshot_formats` hash, that you wish to offer. +Supported formats include "tgz", "tbz2", "txz" (gzip/bzip2/xz +compressed tar archive) and "zip"; please consult gitweb sources for +a definitive list. By default only "tgz" is offered. ++ +This feature can be configured on a per-repository basis via +repository's `gitweb.blame` configuration variable, which contains +a comma separated list of formats or "none" to disable snapshots. +Unknown values are ignored. + +grep:: + Enable grep search, which lists the files in currently selected + tree (directory) containing the given string; see linkgit:git-grep[1]. + This can be potentially CPU-intensive, of course. Enabled by default. ++ +This feature can be configured on a per-repository basis via +repository's `gitweb.grep` configuration variable (boolean). + +pickaxe:: + Enable the so called pickaxe search, which will list the commits + that introduced or removed a given string in a file. This can be + practical and quite faster alternative to "blame" action, but it is + still potentially CPU-intensive. Enabled by default. ++ +The pickaxe search is described in linkgit:git-log[1] (the +description of `-S<string>` option, which refers to pickaxe entry in +linkgit:gitdiffcore[7] for more details). ++ +This feature can be configured on a per-repository basis by setting +repository's `gitweb.pickaxe` configuration variable (boolean). + +show-sizes:: + Enable showing size of blobs (ordinary files) in a "tree" view, in a + separate column, similar to what `ls -l` does; see description of + `-l` option in linkgit:git-ls-tree[1] manpage. This costs a bit of + I/O. Enabled by default. ++ +This feature can be configured on a per-repository basis via +repository's `gitweb.showSizes` configuration variable (boolean). + +patches:: + Enable and configure "patches" view, which displays list of commits in email + (plain text) output format; see also linkgit:git-format-patch[1]. + The value is the maximum number of patches in a patchset generated + in "patches" view. Set the 'default' field to a list containing single + item of or to an empty list to disable patch view, or to a list + containing a single negative number to remove any limit. + Default value is 16. ++ +This feature can be configured on a per-repository basis via +repository's `gitweb.patches` configuration variable (integer). + +avatar:: + Avatar support. When this feature is enabled, views such as + "shortlog" or "commit" will display an avatar associated with + the email of each committer and author. ++ +Currently available providers are *"gravatar"* and *"picon"*. +Only one provider at a time can be selected ('default' is one element list). +If an unknown provider is specified, the feature is disabled. +*Note* that some providers might require extra Perl packages to be +installed; see 'gitweb/INSTALL' for more details. ++ +This feature can be configured on a per-repository basis via +repository's `gitweb.avatar` configuration variable. ++ +See also `%avatar_size` with pixel sizes for icons and avatars +("default" is used for one-line like "log" and "shortlog", "double" +is used for two-line like "commit", "commitdiff" or "tag"). If the +default font sizes or lineheights are changed (e.g. via adding extra +CSS stylesheet in `@stylesheets`), it may be appropriate to change +these values. + +highlight:: + Server-side syntax highlight support in "blob" view. It requires + `$highlight_bin` program to be available (see the description of + this variable in the "Configuration variables" section above), + and therefore is disabled by default. ++ +This feature can be configured on a per-repository basis via +repository's `gitweb.highlight` configuration variable (boolean). + +remote_heads:: + Enable displaying remote heads (remote-tracking branches) in the "heads" + list. In most cases the list of remote-tracking branches is an + unnecessary internal private detail, and this feature is therefore + disabled by default. linkgit:git-instaweb[1], which is usually used + to browse local repositories, enables and uses this feature. ++ +This feature can be configured on a per-repository basis via +repository's `gitweb.remote_heads` configuration variable (boolean). + + +The remaining features cannot be overridden on a per project basis. + +search:: + Enable text search, which will list the commits which match author, + committer or commit text to a given string; see the description of + `--author`, `--committer` and `--grep` options in linkgit:git-log[1] + manpage. Enabled by default. ++ +Project specific override is not supported. + +forks:: + If this feature is enabled, gitweb considers projects in + subdirectories of project root (basename) to be forks of existing + projects. For each project +$projname.git+, projects in the + +$projname/+ directory and its subdirectories will not be + shown in the main projects list. Instead, a \'\+' mark is shown + next to +$projname+, which links to a "forks" view that lists all + the forks (all projects in +$projname/+ subdirectory). Additionally + a "forks" view for a project is linked from project summary page. ++ +If the project list is taken from a file (+$projects_list+ points to a +file), forks are only recognized if they are listed after the main project +in that file. ++ +Project specific override is not supported. + +actions:: + Insert custom links to the action bar of all project pages. This + allows you to link to third-party scripts integrating into gitweb. ++ +The "default" value consists of a list of triplets in the form +`("<label>", "<link>", "<position>")` where "position" is the label +after which to insert the link, "link" is a format string where `%n` +expands to the project name, `%f` to the project path within the +filesystem (i.e. "$projectroot/$project"), `%h` to the current hash +(\'h' gitweb parameter) and `%b` to the current hash base +(\'hb' gitweb parameter); `%%` expands to \'%'. ++ +For example, at the time this page was written, the http://repo.or.cz[] +Git hosting site set it to the following to enable graphical log +(using the third party tool *git-browser*): ++ +---------------------------------------------------------------------- +$feature{'actions'}{'default'} = + [ ('graphiclog', '/git-browser/by-commit.html?r=%n', 'summary')]; +---------------------------------------------------------------------- ++ +This adds a link titled "graphiclog" after the "summary" link, leading to +`git-browser` script, passing `r=<project>` as a query parameter. ++ +Project specific override is not supported. + +timed:: + Enable displaying how much time and how many Git commands it took to + generate and display each page in the page footer (at the bottom of + page). For example the footer might contain: "This page took 6.53325 + seconds and 13 Git commands to generate." Disabled by default. ++ +Project specific override is not supported. + +javascript-timezone:: + Enable and configure the ability to change a common time zone for dates + in gitweb output via JavaScript. Dates in gitweb output include + authordate and committerdate in "commit", "commitdiff" and "log" + views, and taggerdate in "tag" view. Enabled by default. ++ +The value is a list of three values: a default time zone (for if the client +hasn't selected some other time zone and saved it in a cookie), a name of cookie +where to store selected time zone, and a CSS class used to mark up +dates for manipulation. If you want to turn this feature off, set "default" +to empty list: `[]`. ++ +Typical gitweb config files will only change starting (default) time zone, +and leave other elements at their default values: ++ +--------------------------------------------------------------------------- +$feature{'javascript-timezone'}{'default'}[0] = "utc"; +--------------------------------------------------------------------------- ++ +The example configuration presented here is guaranteed to be backwards +and forward compatible. ++ +Time zone values can be "local" (for local time zone that browser uses), "utc" +(what gitweb uses when JavaScript or this feature is disabled), or numerical +time zones in the form of "+/-HHMM", such as "+0200". ++ +Project specific override is not supported. + +extra-branch-refs:: + List of additional directories under "refs" which are going to + be used as branch refs. For example if you have a gerrit setup + where all branches under refs/heads/ are official, + push-after-review ones and branches under refs/sandbox/, + refs/wip and refs/other are user ones where permissions are + much wider, then you might want to set this variable as + follows: ++ +-------------------------------------------------------------------------------- +$feature{'extra-branch-refs'}{'default'} = + ['sandbox', 'wip', 'other']; +-------------------------------------------------------------------------------- ++ +This feature can be configured on per-repository basis after setting +$feature{'extra-branch-refs'}{'override'} to true, via repository's +`gitweb.extraBranchRefs` configuration variable, which contains a +space separated list of refs. An example: ++ +-------------------------------------------------------------------------------- +[gitweb] + extraBranchRefs = sandbox wip other +-------------------------------------------------------------------------------- ++ +The gitweb.extraBranchRefs is actually a multi-valued configuration +variable, so following example is also correct and the result is the +same as of the snippet above: ++ +-------------------------------------------------------------------------------- +[gitweb] + extraBranchRefs = sandbox + extraBranchRefs = wip other +-------------------------------------------------------------------------------- ++ +It is an error to specify a ref that does not pass "git check-ref-format" +scrutiny. Duplicated values are filtered. + + +EXAMPLES +-------- + +To enable blame, pickaxe search, and snapshot support (allowing "tar.gz" and +"zip" snapshots), while allowing individual projects to turn them off, put +the following in your GITWEB_CONFIG file: + + $feature{'blame'}{'default'} = [1]; + $feature{'blame'}{'override'} = 1; + + $feature{'pickaxe'}{'default'} = [1]; + $feature{'pickaxe'}{'override'} = 1; + + $feature{'snapshot'}{'default'} = ['zip', 'tgz']; + $feature{'snapshot'}{'override'} = 1; + +If you allow overriding for the snapshot feature, you can specify which +snapshot formats are globally disabled. You can also add any command-line +options you want (such as setting the compression level). For instance, you +can disable Zip compressed snapshots and set *gzip*(1) to run at level 6 by +adding the following lines to your gitweb configuration file: + + $known_snapshot_formats{'zip'}{'disabled'} = 1; + $known_snapshot_formats{'tgz'}{'compressor'} = ['gzip','-6']; + +BUGS +---- +Debugging would be easier if the fallback configuration file +(`/etc/gitweb.conf`) and environment variable to override its location +('GITWEB_CONFIG_SYSTEM') had names reflecting their "fallback" role. +The current names are kept to avoid breaking working setups. + +ENVIRONMENT +----------- +The location of per-instance and system-wide configuration files can be +overridden using the following environment variables: + +GITWEB_CONFIG:: + Sets location of per-instance configuration file. +GITWEB_CONFIG_SYSTEM:: + Sets location of fallback system-wide configuration file. + This file is read only if per-instance one does not exist. +GITWEB_CONFIG_COMMON:: + Sets location of common system-wide configuration file. + + +FILES +----- +gitweb_config.perl:: + This is default name of per-instance configuration file. The + format of this file is described above. +/etc/gitweb.conf:: + This is default name of fallback system-wide configuration + file. This file is used only if per-instance configuration + variable is not found. +/etc/gitweb-common.conf:: + This is default name of common system-wide configuration + file. + + +SEE ALSO +-------- +linkgit:gitweb[1], linkgit:git-instaweb[1] + +'gitweb/README', 'gitweb/INSTALL' + +GIT +--- +Part of the linkgit:git[1] suite diff --git a/Documentation/gitweb.txt b/Documentation/gitweb.txt new file mode 100644 index 0000000..cd9c895 --- /dev/null +++ b/Documentation/gitweb.txt @@ -0,0 +1,704 @@ +gitweb(1) +========= + +NAME +---- +gitweb - Git web interface (web frontend to Git repositories) + +SYNOPSIS +-------- +To get started with gitweb, run linkgit:git-instaweb[1] from a Git repository. +This would configure and start your web server, and run web browser pointing to +gitweb. + + +DESCRIPTION +----------- +Gitweb provides a web interface to Git repositories. Its features include: + +* Viewing multiple Git repositories with common root. +* Browsing every revision of the repository. +* Viewing the contents of files in the repository at any revision. +* Viewing the revision log of branches, history of files and directories, + see what was changed when, by who. +* Viewing the blame/annotation details of any file (if enabled). +* Generating RSS and Atom feeds of commits, for any branch. + The feeds are auto-discoverable in modern web browsers. +* Viewing everything that was changed in a revision, and step through + revisions one at a time, viewing the history of the repository. +* Finding commits which commit messages matches given search term. + +See http://git.kernel.org/?p=git/git.git;a=tree;f=gitweb[] or +http://repo.or.cz/w/git.git/tree/HEAD:/gitweb/[] for gitweb source code, +browsed using gitweb itself. + + +CONFIGURATION +------------- +Various aspects of gitweb's behavior can be controlled through the configuration +file 'gitweb_config.perl' or '/etc/gitweb.conf'. See the linkgit:gitweb.conf[5] +for details. + +Repositories +~~~~~~~~~~~~ +Gitweb can show information from one or more Git repositories. These +repositories have to be all on local filesystem, and have to share common +repository root, i.e. be all under a single parent repository (but see also +"Advanced web server setup" section, "Webserver configuration with multiple +projects' root" subsection). + +----------------------------------------------------------------------- +our $projectroot = '/path/to/parent/directory'; +----------------------------------------------------------------------- + +The default value for `$projectroot` is '/pub/git'. You can change it during +building gitweb via `GITWEB_PROJECTROOT` build configuration variable. + +By default all Git repositories under `$projectroot` are visible and available +to gitweb. The list of projects is generated by default by scanning the +`$projectroot` directory for Git repositories (for object databases to be +more exact; gitweb is not interested in a working area, and is best suited +to showing "bare" repositories). + +The name of the repository in gitweb is the path to its `$GIT_DIR` (its object +database) relative to `$projectroot`. Therefore the repository $repo can be +found at "$projectroot/$repo". + + +Projects list file format +~~~~~~~~~~~~~~~~~~~~~~~~~ +Instead of having gitweb find repositories by scanning filesystem +starting from $projectroot, you can provide a pre-generated list of +visible projects by setting `$projects_list` to point to a plain text +file with a list of projects (with some additional info). + +This file uses the following format: + +* One record (for project / repository) per line; does not support line +continuation (newline escaping). + +* Leading and trailing whitespace are ignored. + +* Whitespace separated fields; any run of whitespace can be used as field +separator (rules for Perl's "`split(" ", $line)`"). + +* Fields use modified URI encoding, defined in RFC 3986, section 2.1 +(Percent-Encoding), or rather "Query string encoding" (see +http://en.wikipedia.org/wiki/Query_string#URL_encoding[]), the difference +being that SP (" ") can be encoded as "{plus}" (and therefore "{plus}" has to be +also percent-encoded). ++ +Reserved characters are: "%" (used for encoding), "{plus}" (can be used to +encode SPACE), all whitespace characters as defined in Perl, including SP, +TAB and LF, (used to separate fields in a record). + +* Currently recognized fields are: +<repository path>:: + path to repository GIT_DIR, relative to `$projectroot` +<repository owner>:: + displayed as repository owner, preferably full name, or email, + or both + +You can generate the projects list index file using the project_index action +(the 'TXT' link on projects list page) directly from gitweb; see also +"Generating projects list using gitweb" section below. + +Example contents: +----------------------------------------------------------------------- +foo.git Joe+R+Hacker+<joe@example.com> +foo/bar.git O+W+Ner+<owner@example.org> +----------------------------------------------------------------------- + + +By default this file controls only which projects are *visible* on projects +list page (note that entries that do not point to correctly recognized Git +repositories won't be displayed by gitweb). Even if a project is not +visible on projects list page, you can view it nevertheless by hand-crafting +a gitweb URL. By setting `$strict_export` configuration variable (see +linkgit:gitweb.conf[5]) to true value you can allow viewing only of +repositories also shown on the overview page (i.e. only projects explicitly +listed in projects list file will be accessible). + + +Generating projects list using gitweb +~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ + +We assume that GITWEB_CONFIG has its default Makefile value, namely +'gitweb_config.perl'. Put the following in 'gitweb_make_index.perl' file: +---------------------------------------------------------------------------- +read_config_file("gitweb_config.perl"); +$projects_list = $projectroot; +---------------------------------------------------------------------------- + +Then create the following script to get list of project in the format +suitable for GITWEB_LIST build configuration variable (or +`$projects_list` variable in gitweb config): + +---------------------------------------------------------------------------- +#!/bin/sh + +export GITWEB_CONFIG="gitweb_make_index.perl" +export GATEWAY_INTERFACE="CGI/1.1" +export HTTP_ACCEPT="*/*" +export REQUEST_METHOD="GET" +export QUERY_STRING="a=project_index" + +perl -- /var/www/cgi-bin/gitweb.cgi +---------------------------------------------------------------------------- + +Run this script and save its output to a file. This file could then be used +as projects list file, which means that you can set `$projects_list` to its +filename. + + +Controlling access to Git repositories +~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ +By default all Git repositories under `$projectroot` are visible and +available to gitweb. You can however configure how gitweb controls access +to repositories. + +* As described in "Projects list file format" section, you can control which +projects are *visible* by selectively including repositories in projects +list file, and setting `$projects_list` gitweb configuration variable to +point to it. With `$strict_export` set, projects list file can be used to +control which repositories are *available* as well. + +* You can configure gitweb to only list and allow viewing of the explicitly +exported repositories, via `$export_ok` variable in gitweb config file; see +linkgit:gitweb.conf[5] manpage. If it evaluates to true, gitweb shows +repositories only if this file named by `$export_ok` exists in its object +database (if directory has the magic file named `$export_ok`). ++ +For example linkgit:git-daemon[1] by default (unless `--export-all` option +is used) allows pulling only for those repositories that have +'git-daemon-export-ok' file. Adding ++ +-------------------------------------------------------------------------- +our $export_ok = "git-daemon-export-ok"; +-------------------------------------------------------------------------- ++ +makes gitweb show and allow access only to those repositories that can be +fetched from via `git://` protocol. + +* Finally, it is possible to specify an arbitrary perl subroutine that will +be called for each repository to determine if it can be exported. The +subroutine receives an absolute path to the project (repository) as its only +parameter (i.e. "$projectroot/$project"). ++ +For example, if you use mod_perl to run the script, and have dumb +HTTP protocol authentication configured for your repositories, you +can use the following hook to allow access only if the user is +authorized to read the files: ++ +-------------------------------------------------------------------------- +$export_auth_hook = sub { + use Apache2::SubRequest (); + use Apache2::Const -compile => qw(HTTP_OK); + my $path = "$_[0]/HEAD"; + my $r = Apache2::RequestUtil->request; + my $sub = $r->lookup_file($path); + return $sub->filename eq $path + && $sub->status == Apache2::Const::HTTP_OK; +}; +-------------------------------------------------------------------------- + + +Per-repository gitweb configuration +~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ +You can configure individual repositories shown in gitweb by creating file +in the 'GIT_DIR' of Git repository, or by setting some repo configuration +variable (in 'GIT_DIR/config', see linkgit:git-config[1]). + +You can use the following files in repository: + +README.html:: + A html file (HTML fragment) which is included on the gitweb project + "summary" page inside `<div>` block element. You can use it for longer + description of a project, to provide links (for example to project's + homepage), etc. This is recognized only if XSS prevention is off + (`$prevent_xss` is false, see linkgit:gitweb.conf[5]); a way to include + a README safely when XSS prevention is on may be worked out in the + future. + +description (or `gitweb.description`):: + Short (shortened to `$projects_list_description_width` in the projects + list page, which is 25 characters by default; see + linkgit:gitweb.conf[5]) single line description of a project (of a + repository). Plain text file; HTML will be escaped. By default set to ++ +------------------------------------------------------------------------------- +Unnamed repository; edit this file to name it for gitweb. +------------------------------------------------------------------------------- ++ +from the template during repository creation, usually installed in +'/usr/share/git-core/templates/'. You can use the `gitweb.description` repo +configuration variable, but the file takes precedence. + +category (or `gitweb.category`):: + Singe line category of a project, used to group projects if + `$projects_list_group_categories` is enabled. By default (file and + configuration variable absent), uncategorized projects are put in the + `$project_list_default_category` category. You can use the + `gitweb.category` repo configuration variable, but the file takes + precedence. ++ +The configuration variables `$projects_list_group_categories` and +`$project_list_default_category` are described in linkgit:gitweb.conf[5] + +cloneurl (or multiple-valued `gitweb.url`):: + File with repository URL (used for clone and fetch), one per line. + Displayed in the project summary page. You can use multiple-valued + `gitweb.url` repository configuration variable for that, but the file + takes precedence. ++ +This is per-repository enhancement / version of global prefix-based +`@git_base_url_list` gitweb configuration variable (see +linkgit:gitweb.conf[5]). + +gitweb.owner:: + You can use the `gitweb.owner` repository configuration variable to set + repository's owner. It is displayed in the project list and summary + page. ++ +If it's not set, filesystem directory's owner is used (via GECOS field, +i.e. real name field from *getpwuid*(3)) if `$projects_list` is unset +(gitweb scans `$projectroot` for repositories); if `$projects_list` +points to file with list of repositories, then project owner defaults to +value from this file for given repository. + +various `gitweb.*` config variables (in config):: + Read description of `%feature` hash for detailed list, and descriptions. + See also "Configuring gitweb features" section in linkgit:gitweb.conf[5] + + +ACTIONS, AND URLS +----------------- +Gitweb can use path_info (component) based URLs, or it can pass all necessary +information via query parameters. The typical gitweb URLs are broken down in to +five components: + +----------------------------------------------------------------------- +.../gitweb.cgi/<repo>/<action>/<revision>:/<path>?<arguments> +----------------------------------------------------------------------- + +repo:: + The repository the action will be performed on. ++ +All actions except for those that list all available projects, +in whatever form, require this parameter. + +action:: + The action that will be run. Defaults to 'projects_list' if repo + is not set, and to 'summary' otherwise. + +revision:: + Revision shown. Defaults to HEAD. + +path:: + The path within the <repository> that the action is performed on, + for those actions that require it. + +arguments:: + Any arguments that control the behaviour of the action. + +Some actions require or allow to specify two revisions, and sometimes even two +pathnames. In most general form such path_info (component) based gitweb URL +looks like this: + +----------------------------------------------------------------------- +.../gitweb.cgi/<repo>/<action>/<revision_from>:/<path_from>..<revision_to>:/<path_to>?<arguments> +----------------------------------------------------------------------- + + +Each action is implemented as a subroutine, and must be present in %actions +hash. Some actions are disabled by default, and must be turned on via feature +mechanism. For example to enable 'blame' view add the following to gitweb +configuration file: + +----------------------------------------------------------------------- +$feature{'blame'}{'default'} = [1]; +----------------------------------------------------------------------- + + +Actions: +~~~~~~~~ +The standard actions are: + +project_list:: + Lists the available Git repositories. This is the default command if no + repository is specified in the URL. + +summary:: + Displays summary about given repository. This is the default command if + no action is specified in URL, and only repository is specified. + +heads:: +remotes:: + Lists all local or all remote-tracking branches in given repository. ++ +The latter is not available by default, unless configured. + +tags:: + List all tags (lightweight and annotated) in given repository. + +blob:: +tree:: + Shows the files and directories in a given repository path, at given + revision. This is default command if no action is specified in the URL, + and path is given. + +blob_plain:: + Returns the raw data for the file in given repository, at given path and + revision. Links to this action are marked 'raw'. + +blobdiff:: + Shows the difference between two revisions of the same file. + +blame:: +blame_incremental:: + Shows the blame (also called annotation) information for a file. On a + per line basis it shows the revision in which that line was last changed + and the user that committed the change. The incremental version (which + if configured is used automatically when JavaScript is enabled) uses + Ajax to incrementally add blame info to the contents of given file. ++ +This action is disabled by default for performance reasons. + +commit:: +commitdiff:: + Shows information about a specific commit in a repository. The 'commit' + view shows information about commit in more detail, the 'commitdiff' + action shows changeset for given commit. + +patch:: + Returns the commit in plain text mail format, suitable for applying with + linkgit:git-am[1]. + +tag:: + Display specific annotated tag (tag object). + +log:: +shortlog:: + Shows log information (commit message or just commit subject) for a + given branch (starting from given revision). ++ +The 'shortlog' view is more compact; it shows one commit per line. + +history:: + Shows history of the file or directory in a given repository path, + starting from given revision (defaults to HEAD, i.e. default branch). ++ +This view is similar to 'shortlog' view. + +rss:: +atom:: + Generates an RSS (or Atom) feed of changes to repository. + + +WEBSERVER CONFIGURATION +----------------------- +This section explains how to configure some common webservers to run gitweb. In +all cases, `/path/to/gitweb` in the examples is the directory you ran installed +gitweb in, and contains `gitweb_config.perl`. + +If you've configured a web server that isn't listed here for gitweb, please send +in the instructions so they can be included in a future release. + +Apache as CGI +~~~~~~~~~~~~~ +Apache must be configured to support CGI scripts in the directory in +which gitweb is installed. Let's assume that it is '/var/www/cgi-bin' +directory. + +----------------------------------------------------------------------- +ScriptAlias /cgi-bin/ "/var/www/cgi-bin/" + +<Directory "/var/www/cgi-bin"> + Options Indexes FollowSymlinks ExecCGI + AllowOverride None + Order allow,deny + Allow from all +</Directory> +----------------------------------------------------------------------- + +With that configuration the full path to browse repositories would be: + + http://server/cgi-bin/gitweb.cgi + +Apache with mod_perl, via ModPerl::Registry +~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ +You can use mod_perl with gitweb. You must install Apache::Registry +(for mod_perl 1.x) or ModPerl::Registry (for mod_perl 2.x) to enable +this support. + +Assuming that gitweb is installed to '/var/www/perl', the following +Apache configuration (for mod_perl 2.x) is suitable. + +----------------------------------------------------------------------- +Alias /perl "/var/www/perl" + +<Directory "/var/www/perl"> + SetHandler perl-script + PerlResponseHandler ModPerl::Registry + PerlOptions +ParseHeaders + Options Indexes FollowSymlinks +ExecCGI + AllowOverride None + Order allow,deny + Allow from all +</Directory> +----------------------------------------------------------------------- + +With that configuration the full path to browse repositories would be: + + http://server/perl/gitweb.cgi + +Apache with FastCGI +~~~~~~~~~~~~~~~~~~~ +Gitweb works with Apache and FastCGI. First you need to rename, copy +or symlink gitweb.cgi to gitweb.fcgi. Let's assume that gitweb is +installed in '/usr/share/gitweb' directory. The following Apache +configuration is suitable (UNTESTED!) + +----------------------------------------------------------------------- +FastCgiServer /usr/share/gitweb/gitweb.cgi +ScriptAlias /gitweb /usr/share/gitweb/gitweb.cgi + +Alias /gitweb/static /usr/share/gitweb/static +<Directory /usr/share/gitweb/static> + SetHandler default-handler +</Directory> +----------------------------------------------------------------------- + +With that configuration the full path to browse repositories would be: + + http://server/gitweb + + +ADVANCED WEB SERVER SETUP +------------------------- +All of those examples use request rewriting, and need `mod_rewrite` +(or equivalent; examples below are written for Apache). + +Single URL for gitweb and for fetching +~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ +If you want to have one URL for both gitweb and your `http://` +repositories, you can configure Apache like this: + +----------------------------------------------------------------------- +<VirtualHost *:80> + ServerName git.example.org + DocumentRoot /pub/git + SetEnv GITWEB_CONFIG /etc/gitweb.conf + + # turning on mod rewrite + RewriteEngine on + + # make the front page an internal rewrite to the gitweb script + RewriteRule ^/$ /cgi-bin/gitweb.cgi + + # make access for "dumb clients" work + RewriteRule ^/(.*\.git/(?!/?(HEAD|info|objects|refs)).*)?$ \ + /cgi-bin/gitweb.cgi%{REQUEST_URI} [L,PT] +</VirtualHost> +----------------------------------------------------------------------- + +The above configuration expects your public repositories to live under +'/pub/git' and will serve them as `http://git.domain.org/dir-under-pub-git`, +both as clonable Git URL and as browseable gitweb interface. If you then +start your linkgit:git-daemon[1] with `--base-path=/pub/git --export-all` +then you can even use the `git://` URL with exactly the same path. + +Setting the environment variable `GITWEB_CONFIG` will tell gitweb to use the +named file (i.e. in this example '/etc/gitweb.conf') as a configuration for +gitweb. You don't really need it in above example; it is required only if +your configuration file is in different place than built-in (during +compiling gitweb) 'gitweb_config.perl' or '/etc/gitweb.conf'. See +linkgit:gitweb.conf[5] for details, especially information about precedence +rules. + +If you use the rewrite rules from the example you *might* also need +something like the following in your gitweb configuration file +('/etc/gitweb.conf' following example): +---------------------------------------------------------------------------- +@stylesheets = ("/some/absolute/path/gitweb.css"); +$my_uri = "/"; +$home_link = "/"; +$per_request_config = 1; +---------------------------------------------------------------------------- +Nowadays though gitweb should create HTML base tag when needed (to set base +URI for relative links), so it should work automatically. + + +Webserver configuration with multiple projects' root +~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ +If you want to use gitweb with several project roots you can edit your +Apache virtual host and gitweb configuration files in the following way. + +The virtual host configuration (in Apache configuration file) should look +like this: +-------------------------------------------------------------------------- +<VirtualHost *:80> + ServerName git.example.org + DocumentRoot /pub/git + SetEnv GITWEB_CONFIG /etc/gitweb.conf + + # turning on mod rewrite + RewriteEngine on + + # make the front page an internal rewrite to the gitweb script + RewriteRule ^/$ /cgi-bin/gitweb.cgi [QSA,L,PT] + + # look for a public_git folder in unix users' home + # http://git.example.org/~<user>/ + RewriteRule ^/\~([^\/]+)(/|/gitweb.cgi)?$ /cgi-bin/gitweb.cgi \ + [QSA,E=GITWEB_PROJECTROOT:/home/$1/public_git/,L,PT] + + # http://git.example.org/+<user>/ + #RewriteRule ^/\+([^\/]+)(/|/gitweb.cgi)?$ /cgi-bin/gitweb.cgi \ + [QSA,E=GITWEB_PROJECTROOT:/home/$1/public_git/,L,PT] + + # http://git.example.org/user/<user>/ + #RewriteRule ^/user/([^\/]+)/(gitweb.cgi)?$ /cgi-bin/gitweb.cgi \ + [QSA,E=GITWEB_PROJECTROOT:/home/$1/public_git/,L,PT] + + # defined list of project roots + RewriteRule ^/scm(/|/gitweb.cgi)?$ /cgi-bin/gitweb.cgi \ + [QSA,E=GITWEB_PROJECTROOT:/pub/scm/,L,PT] + RewriteRule ^/var(/|/gitweb.cgi)?$ /cgi-bin/gitweb.cgi \ + [QSA,E=GITWEB_PROJECTROOT:/var/git/,L,PT] + + # make access for "dumb clients" work + RewriteRule ^/(.*\.git/(?!/?(HEAD|info|objects|refs)).*)?$ \ + /cgi-bin/gitweb.cgi%{REQUEST_URI} [L,PT] +</VirtualHost> +-------------------------------------------------------------------------- + +Here actual project root is passed to gitweb via `GITWEB_PROJECT_ROOT` +environment variable from a web server, so you need to put the following +line in gitweb configuration file ('/etc/gitweb.conf' in above example): +-------------------------------------------------------------------------- +$projectroot = $ENV{'GITWEB_PROJECTROOT'} || "/pub/git"; +-------------------------------------------------------------------------- +*Note* that this requires to be set for each request, so either +`$per_request_config` must be false, or the above must be put in code +referenced by `$per_request_config`; + +These configurations enable two things. First, each unix user (`<user>`) of +the server will be able to browse through gitweb Git repositories found in +'~/public_git/' with the following url: + + http://git.example.org/~<user>/ + +If you do not want this feature on your server just remove the second +rewrite rule. + +If you already use `mod_userdir` in your virtual host or you don't want to +use the \'~' as first character, just comment or remove the second rewrite +rule, and uncomment one of the following according to what you want. + +Second, repositories found in '/pub/scm/' and '/var/git/' will be accessible +through `http://git.example.org/scm/` and `http://git.example.org/var/`. +You can add as many project roots as you want by adding rewrite rules like +the third and the fourth. + + +PATH_INFO usage +~~~~~~~~~~~~~~~ +If you enable PATH_INFO usage in gitweb by putting +---------------------------------------------------------------------------- +$feature{'pathinfo'}{'default'} = [1]; +---------------------------------------------------------------------------- +in your gitweb configuration file, it is possible to set up your server so +that it consumes and produces URLs in the form + + http://git.example.com/project.git/shortlog/sometag + +i.e. without 'gitweb.cgi' part, by using a configuration such as the +following. This configuration assumes that '/var/www/gitweb' is the +DocumentRoot of your webserver, contains the gitweb.cgi script and +complementary static files (stylesheet, favicon, JavaScript): + +---------------------------------------------------------------------------- +<VirtualHost *:80> + ServerAlias git.example.com + + DocumentRoot /var/www/gitweb + + <Directory /var/www/gitweb> + Options ExecCGI + AddHandler cgi-script cgi + + DirectoryIndex gitweb.cgi + + RewriteEngine On + RewriteCond %{REQUEST_FILENAME} !-f + RewriteCond %{REQUEST_FILENAME} !-d + RewriteRule ^.* /gitweb.cgi/$0 [L,PT] + </Directory> +</VirtualHost> +---------------------------------------------------------------------------- +The rewrite rule guarantees that existing static files will be properly +served, whereas any other URL will be passed to gitweb as PATH_INFO +parameter. + +*Notice* that in this case you don't need special settings for +`@stylesheets`, `$my_uri` and `$home_link`, but you lose "dumb client" +access to your project .git dirs (described in "Single URL for gitweb and +for fetching" section). A possible workaround for the latter is the +following: in your project root dir (e.g. '/pub/git') have the projects +named *without* a .git extension (e.g. '/pub/git/project' instead of +'/pub/git/project.git') and configure Apache as follows: +---------------------------------------------------------------------------- +<VirtualHost *:80> + ServerAlias git.example.com + + DocumentRoot /var/www/gitweb + + AliasMatch ^(/.*?)(\.git)(/.*)?$ /pub/git$1$3 + <Directory /var/www/gitweb> + Options ExecCGI + AddHandler cgi-script cgi + + DirectoryIndex gitweb.cgi + + RewriteEngine On + RewriteCond %{REQUEST_FILENAME} !-f + RewriteCond %{REQUEST_FILENAME} !-d + RewriteRule ^.* /gitweb.cgi/$0 [L,PT] + </Directory> +</VirtualHost> +---------------------------------------------------------------------------- + +The additional AliasMatch makes it so that + + http://git.example.com/project.git + +will give raw access to the project's Git dir (so that the project can be +cloned), while + + http://git.example.com/project + +will provide human-friendly gitweb access. + +This solution is not 100% bulletproof, in the sense that if some project has +a named ref (branch, tag) starting with 'git/', then paths such as + + http://git.example.com/project/command/abranch..git/abranch + +will fail with a 404 error. + + +BUGS +---- +Please report any bugs or feature requests to git@vger.kernel.org, +putting "gitweb" in the subject of email. + +SEE ALSO +-------- +linkgit:gitweb.conf[5], linkgit:git-instaweb[1] + +'gitweb/README', 'gitweb/INSTALL' + +GIT +--- +Part of the linkgit:git[1] suite diff --git a/Documentation/gitworkflows.txt b/Documentation/gitworkflows.txt new file mode 100644 index 0000000..f16c414 --- /dev/null +++ b/Documentation/gitworkflows.txt @@ -0,0 +1,480 @@ +gitworkflows(7) +=============== + +NAME +---- +gitworkflows - An overview of recommended workflows with Git + +SYNOPSIS +-------- +[verse] +git * + + +DESCRIPTION +----------- + +This document attempts to write down and motivate some of the workflow +elements used for `git.git` itself. Many ideas apply in general, +though the full workflow is rarely required for smaller projects with +fewer people involved. + +We formulate a set of 'rules' for quick reference, while the prose +tries to motivate each of them. Do not always take them literally; +you should value good reasons for your actions higher than manpages +such as this one. + + +SEPARATE CHANGES +---------------- + +As a general rule, you should try to split your changes into small +logical steps, and commit each of them. They should be consistent, +working independently of any later commits, pass the test suite, etc. +This makes the review process much easier, and the history much more +useful for later inspection and analysis, for example with +linkgit:git-blame[1] and linkgit:git-bisect[1]. + +To achieve this, try to split your work into small steps from the very +beginning. It is always easier to squash a few commits together than +to split one big commit into several. Don't be afraid of making too +small or imperfect steps along the way. You can always go back later +and edit the commits with `git rebase --interactive` before you +publish them. You can use `git stash save --keep-index` to run the +test suite independent of other uncommitted changes; see the EXAMPLES +section of linkgit:git-stash[1]. + + +MANAGING BRANCHES +----------------- + +There are two main tools that can be used to include changes from one +branch on another: linkgit:git-merge[1] and +linkgit:git-cherry-pick[1]. + +Merges have many advantages, so we try to solve as many problems as +possible with merges alone. Cherry-picking is still occasionally +useful; see "Merging upwards" below for an example. + +Most importantly, merging works at the branch level, while +cherry-picking works at the commit level. This means that a merge can +carry over the changes from 1, 10, or 1000 commits with equal ease, +which in turn means the workflow scales much better to a large number +of contributors (and contributions). Merges are also easier to +understand because a merge commit is a "promise" that all changes from +all its parents are now included. + +There is a tradeoff of course: merges require a more careful branch +management. The following subsections discuss the important points. + + +Graduation +~~~~~~~~~~ + +As a given feature goes from experimental to stable, it also +"graduates" between the corresponding branches of the software. +`git.git` uses the following 'integration branches': + +* 'maint' tracks the commits that should go into the next "maintenance + release", i.e., update of the last released stable version; + +* 'master' tracks the commits that should go into the next release; + +* 'next' is intended as a testing branch for topics being tested for + stability for master. + +There is a fourth official branch that is used slightly differently: + +* 'pu' (proposed updates) is an integration branch for things that are + not quite ready for inclusion yet (see "Integration Branches" + below). + +Each of the four branches is usually a direct descendant of the one +above it. + +Conceptually, the feature enters at an unstable branch (usually 'next' +or 'pu'), and "graduates" to 'master' for the next release once it is +considered stable enough. + + +Merging upwards +~~~~~~~~~~~~~~~ + +The "downwards graduation" discussed above cannot be done by actually +merging downwards, however, since that would merge 'all' changes on +the unstable branch into the stable one. Hence the following: + +.Merge upwards +[caption="Rule: "] +===================================== +Always commit your fixes to the oldest supported branch that require +them. Then (periodically) merge the integration branches upwards into each +other. +===================================== + +This gives a very controlled flow of fixes. If you notice that you +have applied a fix to e.g. 'master' that is also required in 'maint', +you will need to cherry-pick it (using linkgit:git-cherry-pick[1]) +downwards. This will happen a few times and is nothing to worry about +unless you do it very frequently. + + +Topic branches +~~~~~~~~~~~~~~ + +Any nontrivial feature will require several patches to implement, and +may get extra bugfixes or improvements during its lifetime. + +Committing everything directly on the integration branches leads to many +problems: Bad commits cannot be undone, so they must be reverted one +by one, which creates confusing histories and further error potential +when you forget to revert part of a group of changes. Working in +parallel mixes up the changes, creating further confusion. + +Use of "topic branches" solves these problems. The name is pretty +self explanatory, with a caveat that comes from the "merge upwards" +rule above: + +.Topic branches +[caption="Rule: "] +===================================== +Make a side branch for every topic (feature, bugfix, ...). Fork it off +at the oldest integration branch that you will eventually want to merge it +into. +===================================== + +Many things can then be done very naturally: + +* To get the feature/bugfix into an integration branch, simply merge + it. If the topic has evolved further in the meantime, merge again. + (Note that you do not necessarily have to merge it to the oldest + integration branch first. For example, you can first merge a bugfix + to 'next', give it some testing time, and merge to 'maint' when you + know it is stable.) + +* If you find you need new features from the branch 'other' to continue + working on your topic, merge 'other' to 'topic'. (However, do not + do this "just habitually", see below.) + +* If you find you forked off the wrong branch and want to move it + "back in time", use linkgit:git-rebase[1]. + +Note that the last point clashes with the other two: a topic that has +been merged elsewhere should not be rebased. See the section on +RECOVERING FROM UPSTREAM REBASE in linkgit:git-rebase[1]. + +We should point out that "habitually" (regularly for no real reason) +merging an integration branch into your topics -- and by extension, +merging anything upstream into anything downstream on a regular basis +-- is frowned upon: + +.Merge to downstream only at well-defined points +[caption="Rule: "] +===================================== +Do not merge to downstream except with a good reason: upstream API +changes affect your branch; your branch no longer merges to upstream +cleanly; etc. +===================================== + +Otherwise, the topic that was merged to suddenly contains more than a +single (well-separated) change. The many resulting small merges will +greatly clutter up history. Anyone who later investigates the history +of a file will have to find out whether that merge affected the topic +in development. An upstream might even inadvertently be merged into a +"more stable" branch. And so on. + + +Throw-away integration +~~~~~~~~~~~~~~~~~~~~~~ + +If you followed the last paragraph, you will now have many small topic +branches, and occasionally wonder how they interact. Perhaps the +result of merging them does not even work? But on the other hand, we +want to avoid merging them anywhere "stable" because such merges +cannot easily be undone. + +The solution, of course, is to make a merge that we can undo: merge +into a throw-away branch. + +.Throw-away integration branches +[caption="Rule: "] +===================================== +To test the interaction of several topics, merge them into a +throw-away branch. You must never base any work on such a branch! +===================================== + +If you make it (very) clear that this branch is going to be deleted +right after the testing, you can even publish this branch, for example +to give the testers a chance to work with it, or other developers a +chance to see if their in-progress work will be compatible. `git.git` +has such an official throw-away integration branch called 'pu'. + + +Branch management for a release +~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ + +Assuming you are using the merge approach discussed above, when you +are releasing your project you will need to do some additional branch +management work. + +A feature release is created from the 'master' branch, since 'master' +tracks the commits that should go into the next feature release. + +The 'master' branch is supposed to be a superset of 'maint'. If this +condition does not hold, then 'maint' contains some commits that +are not included on 'master'. The fixes represented by those commits +will therefore not be included in your feature release. + +To verify that 'master' is indeed a superset of 'maint', use git log: + +.Verify 'master' is a superset of 'maint' +[caption="Recipe: "] +===================================== +`git log master..maint` +===================================== + +This command should not list any commits. Otherwise, check out +'master' and merge 'maint' into it. + +Now you can proceed with the creation of the feature release. Apply a +tag to the tip of 'master' indicating the release version: + +.Release tagging +[caption="Recipe: "] +===================================== +`git tag -s -m "Git X.Y.Z" vX.Y.Z master` +===================================== + +You need to push the new tag to a public Git server (see +"DISTRIBUTED WORKFLOWS" below). This makes the tag available to +others tracking your project. The push could also trigger a +post-update hook to perform release-related items such as building +release tarballs and preformatted documentation pages. + +Similarly, for a maintenance release, 'maint' is tracking the commits +to be released. Therefore, in the steps above simply tag and push +'maint' rather than 'master'. + + +Maintenance branch management after a feature release +~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ + +After a feature release, you need to manage your maintenance branches. + +First, if you wish to continue to release maintenance fixes for the +feature release made before the recent one, then you must create +another branch to track commits for that previous release. + +To do this, the current maintenance branch is copied to another branch +named with the previous release version number (e.g. maint-X.Y.(Z-1) +where X.Y.Z is the current release). + +.Copy maint +[caption="Recipe: "] +===================================== +`git branch maint-X.Y.(Z-1) maint` +===================================== + +The 'maint' branch should now be fast-forwarded to the newly released +code so that maintenance fixes can be tracked for the current release: + +.Update maint to new release +[caption="Recipe: "] +===================================== +* `git checkout maint` +* `git merge --ff-only master` +===================================== + +If the merge fails because it is not a fast-forward, then it is +possible some fixes on 'maint' were missed in the feature release. +This will not happen if the content of the branches was verified as +described in the previous section. + + +Branch management for next and pu after a feature release +~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ + +After a feature release, the integration branch 'next' may optionally be +rewound and rebuilt from the tip of 'master' using the surviving +topics on 'next': + +.Rewind and rebuild next +[caption="Recipe: "] +===================================== +* `git checkout next` +* `git reset --hard master` +* `git merge ai/topic_in_next1` +* `git merge ai/topic_in_next2` +* ... +===================================== + +The advantage of doing this is that the history of 'next' will be +clean. For example, some topics merged into 'next' may have initially +looked promising, but were later found to be undesirable or premature. +In such a case, the topic is reverted out of 'next' but the fact +remains in the history that it was once merged and reverted. By +recreating 'next', you give another incarnation of such topics a clean +slate to retry, and a feature release is a good point in history to do +so. + +If you do this, then you should make a public announcement indicating +that 'next' was rewound and rebuilt. + +The same rewind and rebuild process may be followed for 'pu'. A public +announcement is not necessary since 'pu' is a throw-away branch, as +described above. + + +DISTRIBUTED WORKFLOWS +--------------------- + +After the last section, you should know how to manage topics. In +general, you will not be the only person working on the project, so +you will have to share your work. + +Roughly speaking, there are two important workflows: merge and patch. +The important difference is that the merge workflow can propagate full +history, including merges, while patches cannot. Both workflows can +be used in parallel: in `git.git`, only subsystem maintainers use +the merge workflow, while everyone else sends patches. + +Note that the maintainer(s) may impose restrictions, such as +"Signed-off-by" requirements, that all commits/patches submitted for +inclusion must adhere to. Consult your project's documentation for +more information. + + +Merge workflow +~~~~~~~~~~~~~~ + +The merge workflow works by copying branches between upstream and +downstream. Upstream can merge contributions into the official +history; downstream base their work on the official history. + +There are three main tools that can be used for this: + +* linkgit:git-push[1] copies your branches to a remote repository, + usually to one that can be read by all involved parties; + +* linkgit:git-fetch[1] that copies remote branches to your repository; + and + +* linkgit:git-pull[1] that does fetch and merge in one go. + +Note the last point. Do 'not' use 'git pull' unless you actually want +to merge the remote branch. + +Getting changes out is easy: + +.Push/pull: Publishing branches/topics +[caption="Recipe: "] +===================================== +`git push <remote> <branch>` and tell everyone where they can fetch +from. +===================================== + +You will still have to tell people by other means, such as mail. (Git +provides the linkgit:git-request-pull[1] to send preformatted pull +requests to upstream maintainers to simplify this task.) + +If you just want to get the newest copies of the integration branches, +staying up to date is easy too: + +.Push/pull: Staying up to date +[caption="Recipe: "] +===================================== +Use `git fetch <remote>` or `git remote update` to stay up to date. +===================================== + +Then simply fork your topic branches from the stable remotes as +explained earlier. + +If you are a maintainer and would like to merge other people's topic +branches to the integration branches, they will typically send a +request to do so by mail. Such a request looks like + +------------------------------------- +Please pull from + <url> <branch> +------------------------------------- + +In that case, 'git pull' can do the fetch and merge in one go, as +follows. + +.Push/pull: Merging remote topics +[caption="Recipe: "] +===================================== +`git pull <url> <branch>` +===================================== + +Occasionally, the maintainer may get merge conflicts when he tries to +pull changes from downstream. In this case, he can ask downstream to +do the merge and resolve the conflicts themselves (perhaps they will +know better how to resolve them). It is one of the rare cases where +downstream 'should' merge from upstream. + + +Patch workflow +~~~~~~~~~~~~~~ + +If you are a contributor that sends changes upstream in the form of +emails, you should use topic branches as usual (see above). Then use +linkgit:git-format-patch[1] to generate the corresponding emails +(highly recommended over manually formatting them because it makes the +maintainer's life easier). + +.format-patch/am: Publishing branches/topics +[caption="Recipe: "] +===================================== +* `git format-patch -M upstream..topic` to turn them into preformatted + patch files +* `git send-email --to=<recipient> <patches>` +===================================== + +See the linkgit:git-format-patch[1] and linkgit:git-send-email[1] +manpages for further usage notes. + +If the maintainer tells you that your patch no longer applies to the +current upstream, you will have to rebase your topic (you cannot use a +merge because you cannot format-patch merges): + +.format-patch/am: Keeping topics up to date +[caption="Recipe: "] +===================================== +`git pull --rebase <url> <branch>` +===================================== + +You can then fix the conflicts during the rebase. Presumably you have +not published your topic other than by mail, so rebasing it is not a +problem. + +If you receive such a patch series (as maintainer, or perhaps as a +reader of the mailing list it was sent to), save the mails to files, +create a new topic branch and use 'git am' to import the commits: + +.format-patch/am: Importing patches +[caption="Recipe: "] +===================================== +`git am < patch` +===================================== + +One feature worth pointing out is the three-way merge, which can help +if you get conflicts: `git am -3` will use index information contained +in patches to figure out the merge base. See linkgit:git-am[1] for +other options. + + +SEE ALSO +-------- +linkgit:gittutorial[7], +linkgit:git-push[1], +linkgit:git-pull[1], +linkgit:git-merge[1], +linkgit:git-rebase[1], +linkgit:git-format-patch[1], +linkgit:git-send-email[1], +linkgit:git-am[1] + +GIT +--- +Part of the linkgit:git[1] suite. diff --git a/Documentation/glossary-content.txt b/Documentation/glossary-content.txt new file mode 100644 index 0000000..8ad29e6 --- /dev/null +++ b/Documentation/glossary-content.txt @@ -0,0 +1,633 @@ +[[def_alternate_object_database]]alternate object database:: + Via the alternates mechanism, a <<def_repository,repository>> + can inherit part of its <<def_object_database,object database>> + from another object database, which is called an "alternate". + +[[def_bare_repository]]bare repository:: + A bare repository is normally an appropriately + named <<def_directory,directory>> with a `.git` suffix that does not + have a locally checked-out copy of any of the files under + revision control. That is, all of the Git + administrative and control files that would normally be present in the + hidden `.git` sub-directory are directly present in the + `repository.git` directory instead, + and no other files are present and checked out. Usually publishers of + public repositories make bare repositories available. + +[[def_blob_object]]blob object:: + Untyped <<def_object,object>>, e.g. the contents of a file. + +[[def_branch]]branch:: + A "branch" is an active line of development. The most recent + <<def_commit,commit>> on a branch is referred to as the tip of + that branch. The tip of the branch is referenced by a branch + <<def_head,head>>, which moves forward as additional development + is done on the branch. A single Git + <<def_repository,repository>> can track an arbitrary number of + branches, but your <<def_working_tree,working tree>> is + associated with just one of them (the "current" or "checked out" + branch), and <<def_HEAD,HEAD>> points to that branch. + +[[def_cache]]cache:: + Obsolete for: <<def_index,index>>. + +[[def_chain]]chain:: + A list of objects, where each <<def_object,object>> in the list contains + a reference to its successor (for example, the successor of a + <<def_commit,commit>> could be one of its <<def_parent,parents>>). + +[[def_changeset]]changeset:: + BitKeeper/cvsps speak for "<<def_commit,commit>>". Since Git does not + store changes, but states, it really does not make sense to use the term + "changesets" with Git. + +[[def_checkout]]checkout:: + The action of updating all or part of the + <<def_working_tree,working tree>> with a <<def_tree_object,tree object>> + or <<def_blob_object,blob>> from the + <<def_object_database,object database>>, and updating the + <<def_index,index>> and <<def_HEAD,HEAD>> if the whole working tree has + been pointed at a new <<def_branch,branch>>. + +[[def_cherry-picking]]cherry-picking:: + In <<def_SCM,SCM>> jargon, "cherry pick" means to choose a subset of + changes out of a series of changes (typically commits) and record them + as a new series of changes on top of a different codebase. In Git, this is + performed by the "git cherry-pick" command to extract the change introduced + by an existing <<def_commit,commit>> and to record it based on the tip + of the current <<def_branch,branch>> as a new commit. + +[[def_clean]]clean:: + A <<def_working_tree,working tree>> is clean, if it + corresponds to the <<def_revision,revision>> referenced by the current + <<def_head,head>>. Also see "<<def_dirty,dirty>>". + +[[def_commit]]commit:: + As a noun: A single point in the + Git history; the entire history of a project is represented as a + set of interrelated commits. The word "commit" is often + used by Git in the same places other revision control systems + use the words "revision" or "version". Also used as a short + hand for <<def_commit_object,commit object>>. ++ +As a verb: The action of storing a new snapshot of the project's +state in the Git history, by creating a new commit representing the current +state of the <<def_index,index>> and advancing <<def_HEAD,HEAD>> +to point at the new commit. + +[[def_commit_object]]commit object:: + An <<def_object,object>> which contains the information about a + particular <<def_revision,revision>>, such as <<def_parent,parents>>, committer, + author, date and the <<def_tree_object,tree object>> which corresponds + to the top <<def_directory,directory>> of the stored + revision. + +[[def_commit-ish]]commit-ish (also committish):: + A <<def_commit_object,commit object>> or an + <<def_object,object>> that can be recursively dereferenced to + a commit object. + The following are all commit-ishes: + a commit object, + a <<def_tag_object,tag object>> that points to a commit + object, + a tag object that points to a tag object that points to a + commit object, + etc. + +[[def_core_git]]core Git:: + Fundamental data structures and utilities of Git. Exposes only limited + source code management tools. + +[[def_DAG]]DAG:: + Directed acyclic graph. The <<def_commit_object,commit objects>> form a + directed acyclic graph, because they have parents (directed), and the + graph of commit objects is acyclic (there is no <<def_chain,chain>> + which begins and ends with the same <<def_object,object>>). + +[[def_dangling_object]]dangling object:: + An <<def_unreachable_object,unreachable object>> which is not + <<def_reachable,reachable>> even from other unreachable objects; a + dangling object has no references to it from any + reference or <<def_object,object>> in the <<def_repository,repository>>. + +[[def_detached_HEAD]]detached HEAD:: + Normally the <<def_HEAD,HEAD>> stores the name of a + <<def_branch,branch>>, and commands that operate on the + history HEAD represents operate on the history leading to the + tip of the branch the HEAD points at. However, Git also + allows you to <<def_checkout,check out>> an arbitrary + <<def_commit,commit>> that isn't necessarily the tip of any + particular branch. The HEAD in such a state is called + "detached". ++ +Note that commands that operate on the history of the current branch +(e.g. `git commit` to build a new history on top of it) still work +while the HEAD is detached. They update the HEAD to point at the tip +of the updated history without affecting any branch. Commands that +update or inquire information _about_ the current branch (e.g. `git +branch --set-upstream-to` that sets what remote-tracking branch the +current branch integrates with) obviously do not work, as there is no +(real) current branch to ask about in this state. + +[[def_directory]]directory:: + The list you get with "ls" :-) + +[[def_dirty]]dirty:: + A <<def_working_tree,working tree>> is said to be "dirty" if + it contains modifications which have not been <<def_commit,committed>> to the current + <<def_branch,branch>>. + +[[def_evil_merge]]evil merge:: + An evil merge is a <<def_merge,merge>> that introduces changes that + do not appear in any <<def_parent,parent>>. + +[[def_fast_forward]]fast-forward:: + A fast-forward is a special type of <<def_merge,merge>> where you have a + <<def_revision,revision>> and you are "merging" another + <<def_branch,branch>>'s changes that happen to be a descendant of what + you have. In such a case, you do not make a new <<def_merge,merge>> + <<def_commit,commit>> but instead just update to his + revision. This will happen frequently on a + <<def_remote_tracking_branch,remote-tracking branch>> of a remote + <<def_repository,repository>>. + +[[def_fetch]]fetch:: + Fetching a <<def_branch,branch>> means to get the + branch's <<def_head_ref,head ref>> from a remote + <<def_repository,repository>>, to find out which objects are + missing from the local <<def_object_database,object database>>, + and to get them, too. See also linkgit:git-fetch[1]. + +[[def_file_system]]file system:: + Linus Torvalds originally designed Git to be a user space file system, + i.e. the infrastructure to hold files and directories. That ensured the + efficiency and speed of Git. + +[[def_git_archive]]Git archive:: + Synonym for <<def_repository,repository>> (for arch people). + +[[def_gitfile]]gitfile:: + A plain file `.git` at the root of a working tree that + points at the directory that is the real repository. + +[[def_grafts]]grafts:: + Grafts enables two otherwise different lines of development to be joined + together by recording fake ancestry information for commits. This way + you can make Git pretend the set of <<def_parent,parents>> a <<def_commit,commit>> has + is different from what was recorded when the commit was + created. Configured via the `.git/info/grafts` file. ++ +Note that the grafts mechanism is outdated and can lead to problems +transferring objects between repositories; see linkgit:git-replace[1] +for a more flexible and robust system to do the same thing. + +[[def_hash]]hash:: + In Git's context, synonym for <<def_object_name,object name>>. + +[[def_head]]head:: + A <<def_ref,named reference>> to the <<def_commit,commit>> at the tip of a + <<def_branch,branch>>. Heads are stored in a file in + `$GIT_DIR/refs/heads/` directory, except when using packed refs. (See + linkgit:git-pack-refs[1].) + +[[def_HEAD]]HEAD:: + The current <<def_branch,branch>>. In more detail: Your <<def_working_tree, + working tree>> is normally derived from the state of the tree + referred to by HEAD. HEAD is a reference to one of the + <<def_head,heads>> in your repository, except when using a + <<def_detached_HEAD,detached HEAD>>, in which case it directly + references an arbitrary commit. + +[[def_head_ref]]head ref:: + A synonym for <<def_head,head>>. + +[[def_hook]]hook:: + During the normal execution of several Git commands, call-outs are made + to optional scripts that allow a developer to add functionality or + checking. Typically, the hooks allow for a command to be pre-verified + and potentially aborted, and allow for a post-notification after the + operation is done. The hook scripts are found in the + `$GIT_DIR/hooks/` directory, and are enabled by simply + removing the `.sample` suffix from the filename. In earlier versions + of Git you had to make them executable. + +[[def_index]]index:: + A collection of files with stat information, whose contents are stored + as objects. The index is a stored version of your + <<def_working_tree,working tree>>. Truth be told, it can also contain a second, and even + a third version of a working tree, which are used + when <<def_merge,merging>>. + +[[def_index_entry]]index entry:: + The information regarding a particular file, stored in the + <<def_index,index>>. An index entry can be unmerged, if a + <<def_merge,merge>> was started, but not yet finished (i.e. if + the index contains multiple versions of that file). + +[[def_master]]master:: + The default development <<def_branch,branch>>. Whenever you + create a Git <<def_repository,repository>>, a branch named + "master" is created, and becomes the active branch. In most + cases, this contains the local development, though that is + purely by convention and is not required. + +[[def_merge]]merge:: + As a verb: To bring the contents of another + <<def_branch,branch>> (possibly from an external + <<def_repository,repository>>) into the current branch. In the + case where the merged-in branch is from a different repository, + this is done by first <<def_fetch,fetching>> the remote branch + and then merging the result into the current branch. This + combination of fetch and merge operations is called a + <<def_pull,pull>>. Merging is performed by an automatic process + that identifies changes made since the branches diverged, and + then applies all those changes together. In cases where changes + conflict, manual intervention may be required to complete the + merge. ++ +As a noun: unless it is a <<def_fast_forward,fast-forward>>, a +successful merge results in the creation of a new <<def_commit,commit>> +representing the result of the merge, and having as +<<def_parent,parents>> the tips of the merged <<def_branch,branches>>. +This commit is referred to as a "merge commit", or sometimes just a +"merge". + +[[def_object]]object:: + The unit of storage in Git. It is uniquely identified by the + <<def_SHA1,SHA-1>> of its contents. Consequently, an + object can not be changed. + +[[def_object_database]]object database:: + Stores a set of "objects", and an individual <<def_object,object>> is + identified by its <<def_object_name,object name>>. The objects usually + live in `$GIT_DIR/objects/`. + +[[def_object_identifier]]object identifier:: + Synonym for <<def_object_name,object name>>. + +[[def_object_name]]object name:: + The unique identifier of an <<def_object,object>>. The + object name is usually represented by a 40 character + hexadecimal string. Also colloquially called <<def_SHA1,SHA-1>>. + +[[def_object_type]]object type:: + One of the identifiers "<<def_commit_object,commit>>", + "<<def_tree_object,tree>>", "<<def_tag_object,tag>>" or + "<<def_blob_object,blob>>" describing the type of an + <<def_object,object>>. + +[[def_octopus]]octopus:: + To <<def_merge,merge>> more than two <<def_branch,branches>>. + +[[def_origin]]origin:: + The default upstream <<def_repository,repository>>. Most projects have + at least one upstream project which they track. By default + 'origin' is used for that purpose. New upstream updates + will be fetched into <<def_remote_tracking_branch,remote-tracking branches>> named + origin/name-of-upstream-branch, which you can see using + `git branch -r`. + +[[def_pack]]pack:: + A set of objects which have been compressed into one file (to save space + or to transmit them efficiently). + +[[def_pack_index]]pack index:: + The list of identifiers, and other information, of the objects in a + <<def_pack,pack>>, to assist in efficiently accessing the contents of a + pack. + +[[def_pathspec]]pathspec:: + Pattern used to limit paths in Git commands. ++ +Pathspecs are used on the command line of "git ls-files", "git +ls-tree", "git add", "git grep", "git diff", "git checkout", +and many other commands to +limit the scope of operations to some subset of the tree or +worktree. See the documentation of each command for whether +paths are relative to the current directory or toplevel. The +pathspec syntax is as follows: ++ +-- + +* any path matches itself +* the pathspec up to the last slash represents a + directory prefix. The scope of that pathspec is + limited to that subtree. +* the rest of the pathspec is a pattern for the remainder + of the pathname. Paths relative to the directory + prefix will be matched against that pattern using fnmatch(3); + in particular, '*' and '?' _can_ match directory separators. + +-- ++ +For example, Documentation/*.jpg will match all .jpg files +in the Documentation subtree, +including Documentation/chapter_1/figure_1.jpg. ++ +A pathspec that begins with a colon `:` has special meaning. In the +short form, the leading colon `:` is followed by zero or more "magic +signature" letters (which optionally is terminated by another colon `:`), +and the remainder is the pattern to match against the path. +The "magic signature" consists of ASCII symbols that are neither +alphanumeric, glob, regex special characters nor colon. +The optional colon that terminates the "magic signature" can be +omitted if the pattern begins with a character that does not belong to +"magic signature" symbol set and is not a colon. ++ +In the long form, the leading colon `:` is followed by a open +parenthesis `(`, a comma-separated list of zero or more "magic words", +and a close parentheses `)`, and the remainder is the pattern to match +against the path. ++ +A pathspec with only a colon means "there is no pathspec". This form +should not be combined with other pathspec. ++ +-- +top;; + The magic word `top` (magic signature: `/`) makes the pattern + match from the root of the working tree, even when you are + running the command from inside a subdirectory. + +literal;; + Wildcards in the pattern such as `*` or `?` are treated + as literal characters. + +icase;; + Case insensitive match. + +glob;; + Git treats the pattern as a shell glob suitable for + consumption by fnmatch(3) with the FNM_PATHNAME flag: + wildcards in the pattern will not match a / in the pathname. + For example, "Documentation/{asterisk}.html" matches + "Documentation/git.html" but not "Documentation/ppc/ppc.html" + or "tools/perf/Documentation/perf.html". ++ +Two consecutive asterisks ("`**`") in patterns matched against +full pathname may have special meaning: + + - A leading "`**`" followed by a slash means match in all + directories. For example, "`**/foo`" matches file or directory + "`foo`" anywhere, the same as pattern "`foo`". "`**/foo/bar`" + matches file or directory "`bar`" anywhere that is directly + under directory "`foo`". + + - A trailing "`/**`" matches everything inside. For example, + "`abc/**`" matches all files inside directory "abc", relative + to the location of the `.gitignore` file, with infinite depth. + + - A slash followed by two consecutive asterisks then a slash + matches zero or more directories. For example, "`a/**/b`" + matches "`a/b`", "`a/x/b`", "`a/x/y/b`" and so on. + + - Other consecutive asterisks are considered invalid. ++ +Glob magic is incompatible with literal magic. + +exclude;; + After a path matches any non-exclude pathspec, it will be run + through all exclude pathspec (magic signature: `!`). If it + matches, the path is ignored. +-- + +[[def_parent]]parent:: + A <<def_commit_object,commit object>> contains a (possibly empty) list + of the logical predecessor(s) in the line of development, i.e. its + parents. + +[[def_pickaxe]]pickaxe:: + The term <<def_pickaxe,pickaxe>> refers to an option to the diffcore + routines that help select changes that add or delete a given text + string. With the `--pickaxe-all` option, it can be used to view the full + <<def_changeset,changeset>> that introduced or removed, say, a + particular line of text. See linkgit:git-diff[1]. + +[[def_plumbing]]plumbing:: + Cute name for <<def_core_git,core Git>>. + +[[def_porcelain]]porcelain:: + Cute name for programs and program suites depending on + <<def_core_git,core Git>>, presenting a high level access to + core Git. Porcelains expose more of a <<def_SCM,SCM>> + interface than the <<def_plumbing,plumbing>>. + +[[def_per_worktree_ref]]per-worktree ref:: + Refs that are per-<<def_working_tree,worktree>>, rather than + global. This is presently only <<def_HEAD,HEAD>> and any refs + that start with `refs/bisect/`, but might later include other + unusual refs. + +[[def_pseudoref]]pseudoref:: + Pseudorefs are a class of files under `$GIT_DIR` which behave + like refs for the purposes of rev-parse, but which are treated + specially by git. Pseudorefs both have names that are all-caps, + and always start with a line consisting of a + <<def_SHA1,SHA-1>> followed by whitespace. So, HEAD is not a + pseudoref, because it is sometimes a symbolic ref. They might + optionally contain some additional data. `MERGE_HEAD` and + `CHERRY_PICK_HEAD` are examples. Unlike + <<def_per_worktree_ref,per-worktree refs>>, these files cannot + be symbolic refs, and never have reflogs. They also cannot be + updated through the normal ref update machinery. Instead, + they are updated by directly writing to the files. However, + they can be read as if they were refs, so `git rev-parse + MERGE_HEAD` will work. + +[[def_pull]]pull:: + Pulling a <<def_branch,branch>> means to <<def_fetch,fetch>> it and + <<def_merge,merge>> it. See also linkgit:git-pull[1]. + +[[def_push]]push:: + Pushing a <<def_branch,branch>> means to get the branch's + <<def_head_ref,head ref>> from a remote <<def_repository,repository>>, + find out if it is a direct ancestor to the branch's local + head ref, and in that case, putting all + objects, which are <<def_reachable,reachable>> from the local + head ref, and which are missing from the remote + repository, into the remote + <<def_object_database,object database>>, and updating the remote + head ref. If the remote <<def_head,head>> is not an + ancestor to the local head, the push fails. + +[[def_reachable]]reachable:: + All of the ancestors of a given <<def_commit,commit>> are said to be + "reachable" from that commit. More + generally, one <<def_object,object>> is reachable from + another if we can reach the one from the other by a <<def_chain,chain>> + that follows <<def_tag,tags>> to whatever they tag, + <<def_commit_object,commits>> to their parents or trees, and + <<def_tree_object,trees>> to the trees or <<def_blob_object,blobs>> + that they contain. + +[[def_rebase]]rebase:: + To reapply a series of changes from a <<def_branch,branch>> to a + different base, and reset the <<def_head,head>> of that branch + to the result. + +[[def_ref]]ref:: + A name that begins with `refs/` (e.g. `refs/heads/master`) + that points to an <<def_object_name,object name>> or another + ref (the latter is called a <<def_symref,symbolic ref>>). + For convenience, a ref can sometimes be abbreviated when used + as an argument to a Git command; see linkgit:gitrevisions[7] + for details. + Refs are stored in the <<def_repository,repository>>. ++ +The ref namespace is hierarchical. +Different subhierarchies are used for different purposes (e.g. the +`refs/heads/` hierarchy is used to represent local branches). ++ +There are a few special-purpose refs that do not begin with `refs/`. +The most notable example is `HEAD`. + +[[def_reflog]]reflog:: + A reflog shows the local "history" of a ref. In other words, + it can tell you what the 3rd last revision in _this_ repository + was, and what was the current state in _this_ repository, + yesterday 9:14pm. See linkgit:git-reflog[1] for details. + +[[def_refspec]]refspec:: + A "refspec" is used by <<def_fetch,fetch>> and + <<def_push,push>> to describe the mapping between remote + <<def_ref,ref>> and local ref. + +[[def_remote]]remote repository:: + A <<def_repository,repository>> which is used to track the same + project but resides somewhere else. To communicate with remotes, + see <<def_fetch,fetch>> or <<def_push,push>>. + +[[def_remote_tracking_branch]]remote-tracking branch:: + A <<def_ref,ref>> that is used to follow changes from another + <<def_repository,repository>>. It typically looks like + 'refs/remotes/foo/bar' (indicating that it tracks a branch named + 'bar' in a remote named 'foo'), and matches the right-hand-side of + a configured fetch <<def_refspec,refspec>>. A remote-tracking + branch should not contain direct modifications or have local + commits made to it. + +[[def_repository]]repository:: + A collection of <<def_ref,refs>> together with an + <<def_object_database,object database>> containing all objects + which are <<def_reachable,reachable>> from the refs, possibly + accompanied by meta data from one or more <<def_porcelain,porcelains>>. A + repository can share an object database with other repositories + via <<def_alternate_object_database,alternates mechanism>>. + +[[def_resolve]]resolve:: + The action of fixing up manually what a failed automatic + <<def_merge,merge>> left behind. + +[[def_revision]]revision:: + Synonym for <<def_commit,commit>> (the noun). + +[[def_rewind]]rewind:: + To throw away part of the development, i.e. to assign the + <<def_head,head>> to an earlier <<def_revision,revision>>. + +[[def_SCM]]SCM:: + Source code management (tool). + +[[def_SHA1]]SHA-1:: + "Secure Hash Algorithm 1"; a cryptographic hash function. + In the context of Git used as a synonym for <<def_object_name,object name>>. + +[[def_shallow_clone]]shallow clone:: + Mostly a synonym to <<def_shallow_repository,shallow repository>> + but the phrase makes it more explicit that it was created by + running `git clone --depth=...` command. + +[[def_shallow_repository]]shallow repository:: + A shallow <<def_repository,repository>> has an incomplete + history some of whose <<def_commit,commits>> have <<def_parent,parents>> cauterized away (in other + words, Git is told to pretend that these commits do not have the + parents, even though they are recorded in the <<def_commit_object,commit + object>>). This is sometimes useful when you are interested only in the + recent history of a project even though the real history recorded in the + upstream is much larger. A shallow repository + is created by giving the `--depth` option to linkgit:git-clone[1], and + its history can be later deepened with linkgit:git-fetch[1]. + +[[def_submodule]]submodule:: + A <<def_repository,repository>> that holds the history of a + separate project inside another repository (the latter of + which is called <<def_superproject, superproject>>). + +[[def_superproject]]superproject:: + A <<def_repository,repository>> that references repositories + of other projects in its working tree as <<def_submodule,submodules>>. + The superproject knows about the names of (but does not hold + copies of) commit objects of the contained submodules. + +[[def_symref]]symref:: + Symbolic reference: instead of containing the <<def_SHA1,SHA-1>> + id itself, it is of the format 'ref: refs/some/thing' and when + referenced, it recursively dereferences to this reference. + '<<def_HEAD,HEAD>>' is a prime example of a symref. Symbolic + references are manipulated with the linkgit:git-symbolic-ref[1] + command. + +[[def_tag]]tag:: + A <<def_ref,ref>> under `refs/tags/` namespace that points to an + object of an arbitrary type (typically a tag points to either a + <<def_tag_object,tag>> or a <<def_commit_object,commit object>>). + In contrast to a <<def_head,head>>, a tag is not updated by + the `commit` command. A Git tag has nothing to do with a Lisp + tag (which would be called an <<def_object_type,object type>> + in Git's context). A tag is most typically used to mark a particular + point in the commit ancestry <<def_chain,chain>>. + +[[def_tag_object]]tag object:: + An <<def_object,object>> containing a <<def_ref,ref>> pointing to + another object, which can contain a message just like a + <<def_commit_object,commit object>>. It can also contain a (PGP) + signature, in which case it is called a "signed tag object". + +[[def_topic_branch]]topic branch:: + A regular Git <<def_branch,branch>> that is used by a developer to + identify a conceptual line of development. Since branches are very easy + and inexpensive, it is often desirable to have several small branches + that each contain very well defined concepts or small incremental yet + related changes. + +[[def_tree]]tree:: + Either a <<def_working_tree,working tree>>, or a <<def_tree_object,tree + object>> together with the dependent <<def_blob_object,blob>> and tree objects + (i.e. a stored representation of a working tree). + +[[def_tree_object]]tree object:: + An <<def_object,object>> containing a list of file names and modes along + with refs to the associated blob and/or tree objects. A + <<def_tree,tree>> is equivalent to a <<def_directory,directory>>. + +[[def_tree-ish]]tree-ish (also treeish):: + A <<def_tree_object,tree object>> or an <<def_object,object>> + that can be recursively dereferenced to a tree object. + Dereferencing a <<def_commit_object,commit object>> yields the + tree object corresponding to the <<def_revision,revision>>'s + top <<def_directory,directory>>. + The following are all tree-ishes: + a <<def_commit-ish,commit-ish>>, + a tree object, + a <<def_tag_object,tag object>> that points to a tree object, + a tag object that points to a tag object that points to a tree + object, + etc. + +[[def_unmerged_index]]unmerged index:: + An <<def_index,index>> which contains unmerged + <<def_index_entry,index entries>>. + +[[def_unreachable_object]]unreachable object:: + An <<def_object,object>> which is not <<def_reachable,reachable>> from a + <<def_branch,branch>>, <<def_tag,tag>>, or any other reference. + +[[def_upstream_branch]]upstream branch:: + The default <<def_branch,branch>> that is merged into the branch in + question (or the branch in question is rebased onto). It is configured + via branch.<name>.remote and branch.<name>.merge. If the upstream branch + of 'A' is 'origin/B' sometimes we say "'A' is tracking 'origin/B'". + +[[def_working_tree]]working tree:: + The tree of actual checked out files. The working tree normally + contains the contents of the <<def_HEAD,HEAD>> commit's tree, + plus any local changes that you have made but not yet committed. diff --git a/Documentation/howto-index.sh b/Documentation/howto-index.sh new file mode 100755 index 0000000..167b363 --- /dev/null +++ b/Documentation/howto-index.sh @@ -0,0 +1,56 @@ +#!/bin/sh + +cat <<\EOF +Git Howto Index +=============== + +Here is a collection of mailing list postings made by various +people describing how they use Git in their workflow. + +EOF + +for txt +do + title=$(expr "$txt" : '.*/\(.*\)\.txt$') + from=$(sed -ne ' + /^$/q + /^From:[ ]/{ + s/// + s/^[ ]*// + s/[ ]*$// + s/^/by / + p + } + ' "$txt") + + abstract=$(sed -ne ' + /^Abstract:[ ]/{ + s/^[^ ]*// + x + s/.*// + x + : again + /^[ ]/{ + s/^[ ]*// + H + n + b again + } + x + p + q + }' "$txt") + + if grep 'Content-type: text/asciidoc' >/dev/null $txt + then + file=$(expr "$txt" : '\(.*\)\.txt$').html + else + file="$txt" + fi + + echo "* link:$file[$title] $from +$abstract + +" + +done diff --git a/Documentation/howto/keep-canonical-history-correct.txt b/Documentation/howto/keep-canonical-history-correct.txt new file mode 100644 index 0000000..35d48ef --- /dev/null +++ b/Documentation/howto/keep-canonical-history-correct.txt @@ -0,0 +1,216 @@ +From: Junio C Hamano <gitster@pobox.com> +Date: Wed, 07 May 2014 13:15:39 -0700 +Subject: Beginner question on "Pull is mostly evil" +Abstract: This how-to explains a method for keeping a + project's history correct when using git pull. +Content-type: text/asciidoc + +Keep authoritative canonical history correct with git pull +========================================================== + +Sometimes a new project integrator will end up with project history +that appears to be "backwards" from what other project developers +expect. This howto presents a suggested integration workflow for +maintaining a central repository. + +Suppose that that central repository has this history: + +------------ + ---o---o---A +------------ + +which ends at commit `A` (time flows from left to right and each node +in the graph is a commit, lines between them indicating parent-child +relationship). + +Then you clone it and work on your own commits, which leads you to +have this history in *your* repository: + +------------ + ---o---o---A---B---C +------------ + +Imagine your coworker did the same and built on top of `A` in *his* +repository in the meantime, and then pushed it to the +central repository: + +------------ + ---o---o---A---X---Y---Z +------------ + +Now, if you `git push` at this point, because your history that leads +to `C` lacks `X`, `Y` and `Z`, it will fail. You need to somehow make +the tip of your history a descendant of `Z`. + +One suggested way to solve the problem is "fetch and then merge", aka +`git pull`. When you fetch, your repository will have a history like +this: + +------------ + ---o---o---A---B---C + \ + X---Y---Z +------------ + +Once you run merge after that, while still on *your* branch, i.e. `C`, +you will create a merge `M` and make the history look like this: + +------------ + ---o---o---A---B---C---M + \ / + X---Y---Z +------------ + +`M` is a descendant of `Z`, so you can push to update the central +repository. Such a merge `M` does not lose any commit in both +histories, so in that sense it may not be wrong, but when people want +to talk about "the authoritative canonical history that is shared +among the project participants", i.e. "the trunk", they often view +it as "commits you see by following the first-parent chain", and use +this command to view it: + +------------ + $ git log --first-parent +------------ + +For all other people who observed the central repository after your +coworker pushed `Z` but before you pushed `M`, the commit on the trunk +used to be `o-o-A-X-Y-Z`. But because you made `M` while you were on +`C`, `M`'s first parent is `C`, so by pushing `M` to advance the +central repository, you made `X-Y-Z` a side branch, not on the trunk. + +You would rather want to have a history of this shape: + +------------ + ---o---o---A---X---Y---Z---M' + \ / + B-----------C +------------ + +so that in the first-parent chain, it is clear that the project first +did `X` and then `Y` and then `Z` and merged a change that consists of +two commits `B` and `C` that achieves a single goal. You may have +worked on fixing the bug #12345 with these two patches, and the merge +`M'` with swapped parents can say in its log message "Merge +fix-bug-12345". Having a way to tell `git pull` to create a merge +but record the parents in reverse order may be a way to do so. + +Note that I said "achieves a single goal" above, because this is +important. "Swapping the merge order" only covers a special case +where the project does not care too much about having unrelated +things done on a single merge but cares a lot about first-parent +chain. + +There are multiple schools of thought about the "trunk" management. + + 1. Some projects want to keep a completely linear history without any + merges. Obviously, swapping the merge order would not match their + taste. You would need to flatten your history on top of the + updated upstream to result in a history of this shape instead: ++ +------------ + ---o---o---A---X---Y---Z---B---C +------------ ++ +with `git pull --rebase` or something. + + 2. Some projects tolerate merges in their history, but do not worry + too much about the first-parent order, and allow fast-forward + merges. To them, swapping the merge order does not hurt, but + it is unnecessary. + + 3. Some projects want each commit on the "trunk" to do one single + thing. The output of `git log --first-parent` in such a project + would show either a merge of a side branch that completes a single + theme, or a single commit that completes a single theme by itself. + If your two commits `B` and `C` (or they may even be two groups of + commits) were solving two independent issues, then the merge `M'` + we made in the earlier example by swapping the merge order is + still not up to the project standard. It merges two unrelated + efforts `B` and `C` at the same time. + +For projects in the last category (Git itself is one of them), +individual developers would want to prepare a history more like +this: + +------------ + C0--C1--C2 topic-c + / + ---o---o---A master + \ + B0--B1--B2 topic-b +------------ + +That is, keeping separate topics on separate branches, perhaps like +so: + +------------ + $ git clone $URL work && cd work + $ git checkout -b topic-b master + $ ... work to create B0, B1 and B2 to complete one theme + $ git checkout -b topic-c master + $ ... same for the theme of topic-c +------------ + +And then + +------------ + $ git checkout master + $ git pull --ff-only +------------ + +would grab `X`, `Y` and `Z` from the upstream and advance your master +branch: + +------------ + C0--C1--C2 topic-c + / + ---o---o---A---X---Y---Z master + \ + B0--B1--B2 topic-b +------------ + +And then you would merge these two branches separately: + +------------ + $ git merge topic-b + $ git merge topic-c +------------ + +to result in + +------------ + C0--C1---------C2 + / \ + ---o---o---A---X---Y---Z---M---N + \ / + B0--B1-----B2 +------------ + +and push it back to the central repository. + +It is very much possible that while you are merging topic-b and +topic-c, somebody again advanced the history in the central repository +to put `W` on top of `Z`, and make your `git push` fail. + +In such a case, you would rewind to discard `M` and `N`, update the +tip of your 'master' again and redo the two merges: + +------------ + $ git reset --hard origin/master + $ git pull --ff-only + $ git merge topic-b + $ git merge topic-c +------------ + +The procedure will result in a history that looks like this: + +------------ + C0--C1--------------C2 + / \ + ---o---o---A---X---Y---Z---W---M'--N' + \ / + B0--B1---------B2 +------------ + +See also http://git-blame.blogspot.com/2013/09/fun-with-first-parent-history.html diff --git a/Documentation/howto/maintain-git.txt b/Documentation/howto/maintain-git.txt new file mode 100644 index 0000000..ca43787 --- /dev/null +++ b/Documentation/howto/maintain-git.txt @@ -0,0 +1,449 @@ +From: Junio C Hamano <gitster@pobox.com> +Date: Wed, 21 Nov 2007 16:32:55 -0800 +Subject: Addendum to "MaintNotes" +Abstract: Imagine that Git development is racing along as usual, when our friendly + neighborhood maintainer is struck down by a wayward bus. Out of the + hordes of suckers (loyal developers), you have been tricked (chosen) to + step up as the new maintainer. This howto will show you "how to" do it. +Content-type: text/asciidoc + +How to maintain Git +=================== + +Activities +---------- + +The maintainer's Git time is spent on three activities. + + - Communication (45%) + + Mailing list discussions on general design, fielding user + questions, diagnosing bug reports; reviewing, commenting on, + suggesting alternatives to, and rejecting patches. + + - Integration (50%) + + Applying new patches from the contributors while spotting and + correcting minor mistakes, shuffling the integration and + testing branches, pushing the results out, cutting the + releases, and making announcements. + + - Own development (5%) + + Scratching my own itch and sending proposed patch series out. + +The Policy +---------- + +The policy on Integration is informally mentioned in "A Note +from the maintainer" message, which is periodically posted to +this mailing list after each feature release is made. + + - Feature releases are numbered as vX.Y.0 and are meant to + contain bugfixes and enhancements in any area, including + functionality, performance and usability, without regression. + + - One release cycle for a feature release is expected to last for + eight to ten weeks. + + - Maintenance releases are numbered as vX.Y.Z and are meant + to contain only bugfixes for the corresponding vX.Y.0 feature + release and earlier maintenance releases vX.Y.W (W < Z). + + - 'master' branch is used to prepare for the next feature + release. In other words, at some point, the tip of 'master' + branch is tagged with vX.Y.0. + + - 'maint' branch is used to prepare for the next maintenance + release. After the feature release vX.Y.0 is made, the tip + of 'maint' branch is set to that release, and bugfixes will + accumulate on the branch, and at some point, the tip of the + branch is tagged with vX.Y.1, vX.Y.2, and so on. + + - 'next' branch is used to publish changes (both enhancements + and fixes) that (1) have worthwhile goal, (2) are in a fairly + good shape suitable for everyday use, (3) but have not yet + demonstrated to be regression free. New changes are tested + in 'next' before merged to 'master'. + + - 'pu' branch is used to publish other proposed changes that do + not yet pass the criteria set for 'next'. + + - The tips of 'master' and 'maint' branches will not be rewound to + allow people to build their own customization on top of them. + Early in a new development cycle, 'next' is rewound to the tip of + 'master' once, but otherwise it will not be rewound until the end + of the cycle. + + - Usually 'master' contains all of 'maint' and 'next' contains all + of 'master'. 'pu' contains all the topics merged to 'next', but + is rebuilt directly on 'master'. + + - The tip of 'master' is meant to be more stable than any + tagged releases, and the users are encouraged to follow it. + + - The 'next' branch is where new action takes place, and the + users are encouraged to test it so that regressions and bugs + are found before new topics are merged to 'master'. + +Note that before v1.9.0 release, the version numbers used to be +structured slightly differently. vX.Y.Z were feature releases while +vX.Y.Z.W were maintenance releases for vX.Y.Z. + + +A Typical Git Day +----------------- + +A typical Git day for the maintainer implements the above policy +by doing the following: + + - Scan mailing list. Respond with review comments, suggestions + etc. Kibitz. Collect potentially usable patches from the + mailing list. Patches about a single topic go to one mailbox (I + read my mail in Gnus, and type \C-o to save/append messages in + files in mbox format). + + - Write his own patches to address issues raised on the list but + nobody has stepped up solving. Send it out just like other + contributors do, and pick them up just like patches from other + contributors (see above). + + - Review the patches in the saved mailboxes. Edit proposed log + message for typofixes and clarifications, and add Acks + collected from the list. Edit patch to incorporate "Oops, + that should have been like this" fixes from the discussion. + + - Classify the collected patches and handle 'master' and + 'maint' updates: + + - Obviously correct fixes that pertain to the tip of 'maint' + are directly applied to 'maint'. + + - Obviously correct fixes that pertain to the tip of 'master' + are directly applied to 'master'. + + - Other topics are not handled in this step. + + This step is done with "git am". + + $ git checkout master ;# or "git checkout maint" + $ git am -sc3 mailbox + $ make test + + In practice, almost no patch directly goes to 'master' or + 'maint'. + + - Review the last issue of "What's cooking" message, review the + topics ready for merging (topic->master and topic->maint). Use + "Meta/cook -w" script (where Meta/ contains a checkout of the + 'todo' branch) to aid this step. + + And perform the merge. Use "Meta/Reintegrate -e" script (see + later) to aid this step. + + $ Meta/cook -w last-issue-of-whats-cooking.mbox + + $ git checkout master ;# or "git checkout maint" + $ echo ai/topic | Meta/Reintegrate -e ;# "git merge ai/topic" + $ git log -p ORIG_HEAD.. ;# final review + $ git diff ORIG_HEAD.. ;# final review + $ make test ;# final review + + - Handle the remaining patches: + + - Anything unobvious that is applicable to 'master' (in other + words, does not depend on anything that is still in 'next' + and not in 'master') is applied to a new topic branch that + is forked from the tip of 'master'. This includes both + enhancements and unobvious fixes to 'master'. A topic + branch is named as ai/topic where "ai" is two-letter string + named after author's initial and "topic" is a descriptive name + of the topic (in other words, "what's the series is about"). + + - An unobvious fix meant for 'maint' is applied to a new + topic branch that is forked from the tip of 'maint'. The + topic is named as ai/maint-topic. + + - Changes that pertain to an existing topic are applied to + the branch, but: + + - obviously correct ones are applied first; + + - questionable ones are discarded or applied to near the tip; + + - Replacement patches to an existing topic are accepted only + for commits not in 'next'. + + The above except the "replacement" are all done with: + + $ git checkout ai/topic ;# or "git checkout -b ai/topic master" + $ git am -sc3 mailbox + + while patch replacement is often done by: + + $ git format-patch ai/topic~$n..ai/topic ;# export existing + + then replace some parts with the new patch, and reapplying: + + $ git checkout ai/topic + $ git reset --hard ai/topic~$n + $ git am -sc3 -s 000*.txt + + The full test suite is always run for 'maint' and 'master' + after patch application; for topic branches the tests are run + as time permits. + + - Merge maint to master as needed: + + $ git checkout master + $ git merge maint + $ make test + + - Merge master to next as needed: + + $ git checkout next + $ git merge master + $ make test + + - Review the last issue of "What's cooking" again and see if topics + that are ready to be merged to 'next' are still in good shape + (e.g. has there any new issue identified on the list with the + series?) + + - Prepare 'jch' branch, which is used to represent somewhere + between 'master' and 'pu' and often is slightly ahead of 'next'. + + $ Meta/Reintegrate master..pu >Meta/redo-jch.sh + + The result is a script that lists topics to be merged in order to + rebuild 'pu' as the input to Meta/Reintegrate script. Remove + later topics that should not be in 'jch' yet. Add a line that + consists of '### match next' before the name of the first topic + in the output that should be in 'jch' but not in 'next' yet. + + - Now we are ready to start merging topics to 'next'. For each + branch whose tip is not merged to 'next', one of three things can + happen: + + - The commits are all next-worthy; merge the topic to next; + - The new parts are of mixed quality, but earlier ones are + next-worthy; merge the early parts to next; + - Nothing is next-worthy; do not do anything. + + This step is aided with Meta/redo-jch.sh script created earlier. + If a topic that was already in 'next' gained a patch, the script + would list it as "ai/topic~1". To include the new patch to the + updated 'next', drop the "~1" part; to keep it excluded, do not + touch the line. If a topic that was not in 'next' should be + merged to 'next', add it at the end of the list. Then: + + $ git checkout -B jch master + $ Meta/redo-jch.sh -c1 + + to rebuild the 'jch' branch from scratch. "-c1" tells the script + to stop merging at the first line that begins with '###' + (i.e. the "### match next" line you added earlier). + + At this point, build-test the result. It may reveal semantic + conflicts (e.g. a topic renamed a variable, another added a new + reference to the variable under its old name), in which case + prepare an appropriate merge-fix first (see appendix), and + rebuild the 'jch' branch from scratch, starting at the tip of + 'master'. + + Then do the same to 'next' + + $ git checkout next + $ sh Meta/redo-jch.sh -c1 -e + + The "-e" option allows the merge message that comes from the + history of the topic and the comments in the "What's cooking" to + be edited. The resulting tree should match 'jch' as the same set + of topics are merged on 'master'; otherwise there is a mismerge. + Investigate why and do not proceed until the mismerge is found + and rectified. + + $ git diff jch next + + When all is well, clean up the redo-jch.sh script with + + $ sh Meta/redo-jch.sh -u + + This removes topics listed in the script that have already been + merged to 'master'. This may lose '### match next' marker; + add it again to the appropriate place when it happens. + + - Rebuild 'pu'. + + $ Meta/Reintegrate master..pu >Meta/redo-pu.sh + + Edit the result by adding new topics that are not still in 'pu' + in the script. Then + + $ git checkout -B pu jch + $ sh Meta/redo-pu.sh + + When all is well, clean up the redo-pu.sh script with + + $ sh Meta/redo-pu.sh -u + + Double check by running + + $ git branch --no-merged pu + + to see there is no unexpected leftover topics. + + At this point, build-test the result for semantic conflicts, and + if there are, prepare an appropriate merge-fix first (see + appendix), and rebuild the 'pu' branch from scratch, starting at + the tip of 'jch'. + + - Update "What's cooking" message to review the updates to + existing topics, newly added topics and graduated topics. + + This step is helped with Meta/cook script. + + $ Meta/cook + + This script inspects the history between master..pu, finds tips + of topic branches, compares what it found with the current + contents in Meta/whats-cooking.txt, and updates that file. + Topics not listed in the file but are found in master..pu are + added to the "New topics" section, topics listed in the file that + are no longer found in master..pu are moved to the "Graduated to + master" section, and topics whose commits changed their states + (e.g. used to be only in 'pu', now merged to 'next') are updated + with change markers "<<" and ">>". + + Look for lines enclosed in "<<" and ">>"; they hold contents from + old file that are replaced by this integration round. After + verifying them, remove the old part. Review the description for + each topic and update its doneness and plan as needed. To review + the updated plan, run + + $ Meta/cook -w + + which will pick up comments given to the topics, such as "Will + merge to 'next'", etc. (see Meta/cook script to learn what kind + of phrases are supported). + + - Compile, test and install all four (five) integration branches; + Meta/Dothem script may aid this step. + + - Format documentation if the 'master' branch was updated; + Meta/dodoc.sh script may aid this step. + + - Push the integration branches out to public places; Meta/pushall + script may aid this step. + +Observations +------------ + +Some observations to be made. + + * Each topic is tested individually, and also together with other + topics cooking first in 'pu', then in 'jch' and then in 'next'. + Until it matures, no part of it is merged to 'master'. + + * A topic already in 'next' can get fixes while still in + 'next'. Such a topic will have many merges to 'next' (in + other words, "git log --first-parent next" will show many + "Merge branch 'ai/topic' to next" for the same topic. + + * An unobvious fix for 'maint' is cooked in 'next' and then + merged to 'master' to make extra sure it is Ok and then + merged to 'maint'. + + * Even when 'next' becomes empty (in other words, all topics + prove stable and are merged to 'master' and "git diff master + next" shows empty), it has tons of merge commits that will + never be in 'master'. + + * In principle, "git log --first-parent master..next" should + show nothing but merges (in practice, there are fixup commits + and reverts that are not merges). + + * Commits near the tip of a topic branch that are not in 'next' + are fair game to be discarded, replaced or rewritten. + Commits already merged to 'next' will not be. + + * Being in the 'next' branch is not a guarantee for a topic to + be included in the next feature release. Being in the + 'master' branch typically is. + + +Appendix +-------- + +Preparing a "merge-fix" +~~~~~~~~~~~~~~~~~~~~~~~ + +A merge of two topics may not textually conflict but still have +conflict at the semantic level. A classic example is for one topic +to rename an variable and all its uses, while another topic adds a +new use of the variable under its old name. When these two topics +are merged together, the reference to the variable newly added by +the latter topic will still use the old name in the result. + +The Meta/Reintegrate script that is used by redo-jch and redo-pu +scripts implements a crude but usable way to work this issue around. +When the script merges branch $X, it checks if "refs/merge-fix/$X" +exists, and if so, the effect of it is squashed into the result of +the mechanical merge. In other words, + + $ echo $X | Meta/Reintegrate + +is roughly equivalent to this sequence: + + $ git merge --rerere-autoupdate $X + $ git commit + $ git cherry-pick -n refs/merge-fix/$X + $ git commit --amend + +The goal of this "prepare a merge-fix" step is to come up with a +commit that can be squashed into a result of mechanical merge to +correct semantic conflicts. + +After finding that the result of merging branch "ai/topic" to an +integration branch had such a semantic conflict, say pu~4, check the +problematic merge out on a detached HEAD, edit the working tree to +fix the semantic conflict, and make a separate commit to record the +fix-up: + + $ git checkout pu~4 + $ git show -s --pretty=%s ;# double check + Merge branch 'ai/topic' to pu + $ edit + $ git commit -m 'merge-fix/ai/topic' -a + +Then make a reference "refs/merge-fix/ai/topic" to point at this +result: + + $ git update-ref refs/merge-fix/ai/topic HEAD + +Then double check the result by asking Meta/Reintegrate to redo the +merge: + + $ git checkout pu~5 ;# the parent of the problem merge + $ echo ai/topic | Meta/Reintegrate + $ git diff pu~4 + +This time, because you prepared refs/merge-fix/ai/topic, the +resulting merge should have been tweaked to include the fix for the +semantic conflict. + +Note that this assumes that the order in which conflicting branches +are merged does not change. If the reason why merging ai/topic +branch needs this merge-fix is because another branch merged earlier +to the integration branch changed the underlying assumption ai/topic +branch made (e.g. ai/topic branch added a site to refer to a +variable, while the other branch renamed that variable and adjusted +existing use sites), and if you changed redo-jch (or redo-pu) script +to merge ai/topic branch before the other branch, then the above +merge-fix should not be applied while merging ai/topic, but should +instead be applied while merging the other branch. You would need +to move the fix to apply to the other branch, perhaps like this: + + $ mf=refs/merge-fix + $ git update-ref $mf/$the_other_branch $mf/ai/topic + $ git update-ref -d $mf/ai/topic diff --git a/Documentation/howto/new-command.txt b/Documentation/howto/new-command.txt new file mode 100644 index 0000000..6d772bd --- /dev/null +++ b/Documentation/howto/new-command.txt @@ -0,0 +1,106 @@ +From: Eric S. Raymond <esr@thyrsus.com> +Abstract: This is how-to documentation for people who want to add extension + commands to Git. It should be read alongside api-builtin.txt. +Content-type: text/asciidoc + +How to integrate new subcommands +================================ + +This is how-to documentation for people who want to add extension +commands to Git. It should be read alongside api-builtin.txt. + +Runtime environment +------------------- + +Git subcommands are standalone executables that live in the Git exec +path, normally /usr/lib/git-core. The git executable itself is a +thin wrapper that knows where the subcommands live, and runs them by +passing command-line arguments to them. + +(If "git foo" is not found in the Git exec path, the wrapper +will look in the rest of your $PATH for it. Thus, it's possible +to write local Git extensions that don't live in system space.) + +Implementation languages +------------------------ + +Most subcommands are written in C or shell. A few are written in +Perl. + +While we strongly encourage coding in portable C for portability, +these specific scripting languages are also acceptable. We won't +accept more without a very strong technical case, as we don't want +to broaden the Git suite's required dependencies. Import utilities, +surgical tools, remote helpers and other code at the edges of the +Git suite are more lenient and we allow Python (and even Tcl/tk), +but they should not be used for core functions. + +This may change in the future. Especially Python is not allowed in +core because we need better Python integration in the Git Windows +installer before we can be confident people in that environment +won't experience an unacceptably large loss of capability. + +C commands are normally written as single modules, named after the +command, that link a collection of functions called libgit. Thus, +your command 'git-foo' would normally be implemented as a single +"git-foo.c" (or "builtin/foo.c" if it is to be linked to the main +binary); this organization makes it easy for people reading the code +to find things. + +See the CodingGuidelines document for other guidance on what we consider +good practice in C and shell, and api-builtin.txt for the support +functions available to built-in commands written in C. + +What every extension command needs +---------------------------------- + +You must have a man page, written in asciidoc (this is what Git help +followed by your subcommand name will display). Be aware that there is +a local asciidoc configuration and macros which you should use. It's +often helpful to start by cloning an existing page and replacing the +text content. + +You must have a test, written to report in TAP (Test Anything Protocol). +Tests are executables (usually shell scripts) that live in the 't' +subdirectory of the tree. Each test name begins with 't' and a sequence +number that controls where in the test sequence it will be executed; +conventionally the rest of the name stem is that of the command +being tested. + +Read the file t/README to learn more about the conventions to be used +in writing tests, and the test support library. + +Integrating a command +--------------------- + +Here are the things you need to do when you want to merge a new +subcommand into the Git tree. + +1. Don't forget to sign off your patch! + +2. Append your command name to one of the variables BUILTIN_OBJS, +EXTRA_PROGRAMS, SCRIPT_SH, SCRIPT_PERL or SCRIPT_PYTHON. + +3. Drop its test in the t directory. + +4. If your command is implemented in an interpreted language with a +p-code intermediate form, make sure .gitignore in the main directory +includes a pattern entry that ignores such files. Python .pyc and +.pyo files will already be covered. + +5. If your command has any dependency on a particular version of +your language, document it in the INSTALL file. + +6. There is a file command-list.txt in the distribution main directory +that categorizes commands by type, so they can be listed in appropriate +subsections in the documentation's summary command list. Add an entry +for yours. To understand the categories, look at git-commands.txt +in the main directory. If the new command is part of the typical Git +workflow and you believe it common enough to be mentioned in 'git help', +map this command to a common group in the column [common]. + +7. Give the maintainer one paragraph to include in the RelNotes file +to describe the new feature; a good place to do so is in the cover +letter [PATCH 0/n]. + +That's all there is to it. diff --git a/Documentation/howto/rebase-from-internal-branch.txt b/Documentation/howto/rebase-from-internal-branch.txt new file mode 100644 index 0000000..02cb5f7 --- /dev/null +++ b/Documentation/howto/rebase-from-internal-branch.txt @@ -0,0 +1,164 @@ +From: Junio C Hamano <gitster@pobox.com> +To: git@vger.kernel.org +Cc: Petr Baudis <pasky@suse.cz>, Linus Torvalds <torvalds@osdl.org> +Subject: Re: sending changesets from the middle of a git tree +Date: Sun, 14 Aug 2005 18:37:39 -0700 +Abstract: In this article, JC talks about how he rebases the + public "pu" branch using the core Git tools when he updates + the "master" branch, and how "rebase" works. Also discussed + is how this applies to individual developers who sends patches + upstream. +Content-type: text/asciidoc + +How to rebase from an internal branch +===================================== + +-------------------------------------- +Petr Baudis <pasky@suse.cz> writes: + +> Dear diary, on Sun, Aug 14, 2005 at 09:57:13AM CEST, I got a letter +> where Junio C Hamano <junkio@cox.net> told me that... +>> Linus Torvalds <torvalds@osdl.org> writes: +>> +>> > Junio, maybe you want to talk about how you move patches from your "pu" +>> > branch to the real branches. +>> +> Actually, wouldn't this be also precisely for what StGIT is intended to? +-------------------------------------- + +Exactly my feeling. I was sort of waiting for Catalin to speak +up. With its basing philosophical ancestry on quilt, this is +the kind of task StGIT is designed to do. + +I just have done a simpler one, this time using only the core +Git tools. + +I had a handful of commits that were ahead of master in pu, and I +wanted to add some documentation bypassing my usual habit of +placing new things in pu first. At the beginning, the commit +ancestry graph looked like this: + + *"pu" head + master --> #1 --> #2 --> #3 + +So I started from master, made a bunch of edits, and committed: + + $ git checkout master + $ cd Documentation; ed git.txt ... + $ cd ..; git add Documentation/*.txt + $ git commit -s + +After the commit, the ancestry graph would look like this: + + *"pu" head + master^ --> #1 --> #2 --> #3 + \ + \---> master + +The old master is now master^ (the first parent of the master). +The new master commit holds my documentation updates. + +Now I have to deal with "pu" branch. + +This is the kind of situation I used to have all the time when +Linus was the maintainer and I was a contributor, when you look +at "master" branch being the "maintainer" branch, and "pu" +branch being the "contributor" branch. Your work started at the +tip of the "maintainer" branch some time ago, you made a lot of +progress in the meantime, and now the maintainer branch has some +other commits you do not have yet. And "git rebase" was written +with the explicit purpose of helping to maintain branches like +"pu". You _could_ merge master to pu and keep going, but if you +eventually want to cherrypick and merge some but not necessarily +all changes back to the master branch, it often makes later +operations for _you_ easier if you rebase (i.e. carry forward +your changes) "pu" rather than merge. So I ran "git rebase": + + $ git checkout pu + $ git rebase master pu + +What this does is to pick all the commits since the current +branch (note that I now am on "pu" branch) forked from the +master branch, and forward port these changes. + + master^ --> #1 --> #2 --> #3 + \ *"pu" head + \---> master --> #1' --> #2' --> #3' + +The diff between master^ and #1 is applied to master and +committed to create #1' commit with the commit information (log, +author and date) taken from commit #1. On top of that #2' and #3' +commits are made similarly out of #2 and #3 commits. + +Old #3 is not recorded in any of the .git/refs/heads/ file +anymore, so after doing this you will have dangling commit if +you ran fsck-cache, which is normal. After testing "pu", you +can run "git prune" to get rid of those original three commits. + +While I am talking about "git rebase", I should talk about how +to do cherrypicking using only the core Git tools. + +Let's go back to the earlier picture, with different labels. + +You, as an individual developer, cloned upstream repository and +made a couple of commits on top of it. + + *your "master" head + upstream --> #1 --> #2 --> #3 + +You would want changes #2 and #3 incorporated in the upstream, +while you feel that #1 may need further improvements. So you +prepare #2 and #3 for e-mail submission. + + $ git format-patch master^^ master + +This creates two files, 0001-XXXX.patch and 0002-XXXX.patch. Send +them out "To: " your project maintainer and "Cc: " your mailing +list. You could use contributed script git-send-email if +your host has necessary perl modules for this, but your usual +MUA would do as long as it does not corrupt whitespaces in the +patch. + +Then you would wait, and you find out that the upstream picked +up your changes, along with other changes. + + where *your "master" head + upstream --> #1 --> #2 --> #3 + used \ + to be \--> #A --> #2' --> #3' --> #B --> #C + *upstream head + +The two commits #2' and #3' in the above picture record the same +changes your e-mail submission for #2 and #3 contained, but +probably with the new sign-off line added by the upstream +maintainer and definitely with different committer and ancestry +information, they are different objects from #2 and #3 commits. + +You fetch from upstream, but not merge. + + $ git fetch upstream + +This leaves the updated upstream head in .git/FETCH_HEAD but +does not touch your .git/HEAD or .git/refs/heads/master. +You run "git rebase" now. + + $ git rebase FETCH_HEAD master + +Earlier, I said that rebase applies all the commits from your +branch on top of the upstream head. Well, I lied. "git rebase" +is a bit smarter than that and notices that #2 and #3 need not +be applied, so it only applies #1. The commit ancestry graph +becomes something like this: + + where *your old "master" head + upstream --> #1 --> #2 --> #3 + used \ your new "master" head* + to be \--> #A --> #2' --> #3' --> #B --> #C --> #1' + *upstream + head + +Again, "git prune" would discard the disused commits #1-#3 and +you continue on starting from the new "master" head, which is +the #1' commit. + +-jc diff --git a/Documentation/howto/rebuild-from-update-hook.txt b/Documentation/howto/rebuild-from-update-hook.txt new file mode 100644 index 0000000..25378f6 --- /dev/null +++ b/Documentation/howto/rebuild-from-update-hook.txt @@ -0,0 +1,90 @@ +Subject: [HOWTO] Using post-update hook +Message-ID: <7vy86o6usx.fsf@assigned-by-dhcp.cox.net> +From: Junio C Hamano <gitster@pobox.com> +Date: Fri, 26 Aug 2005 18:19:10 -0700 +Abstract: In this how-to article, JC talks about how he + uses the post-update hook to automate Git documentation page + shown at http://www.kernel.org/pub/software/scm/git/docs/. +Content-type: text/asciidoc + +How to rebuild from update hook +=============================== + +The pages under http://www.kernel.org/pub/software/scm/git/docs/ +are built from Documentation/ directory of the git.git project +and needed to be kept up-to-date. The www.kernel.org/ servers +are mirrored and I was told that the origin of the mirror is on +the machine $some.kernel.org, on which I was given an account +when I took over Git maintainership from Linus. + +The directories relevant to this how-to are these two: + + /pub/scm/git/git.git/ The public Git repository. + /pub/software/scm/git/docs/ The HTML documentation page. + +So I made a repository to generate the documentation under my +home directory over there. + + $ cd + $ mkdir doc-git && cd doc-git + $ git clone /pub/scm/git/git.git/ docgen + +What needs to happen is to update the $HOME/doc-git/docgen/ +working tree, build HTML docs there and install the result in +/pub/software/scm/git/docs/ directory. So I wrote a little +script: + + $ cat >dododoc.sh <<\EOF + #!/bin/sh + cd $HOME/doc-git/docgen || exit + + unset GIT_DIR + + git pull /pub/scm/git/git.git/ master && + cd Documentation && + make install-webdoc + EOF + +Initially I used to run this by hand whenever I push into the +public Git repository. Then I did a cron job that ran twice a +day. The current round uses the post-update hook mechanism, +like this: + + $ cat >/pub/scm/git/git.git/hooks/post-update <<\EOF + #!/bin/sh + # + # An example hook script to prepare a packed repository for use over + # dumb transports. + # + # To enable this hook, make this file executable by "chmod +x post-update". + + case " $* " in + *' refs/heads/master '*) + echo $HOME/doc-git/dododoc.sh | at now + ;; + esac + exec git-update-server-info + EOF + $ chmod +x /pub/scm/git/git.git/hooks/post-update + +There are four things worth mentioning: + + - The update-hook is run after the repository accepts a "git + push", under my user privilege. It is given the full names + of refs that have been updated as arguments. My post-update + runs the dododoc.sh script only when the master head is + updated. + + - When update-hook is run, GIT_DIR is set to '.' by the calling + receive-pack. This is inherited by the dododoc.sh run via + the "at" command, and needs to be unset; otherwise, "git + pull" it does into $HOME/doc-git/docgen/ repository would not + work correctly. + + - The stdout of update hook script is not connected to git + push; I run the heavy part of the command inside "at", to + receive the execution report via e-mail. + + - This is still crude and does not protect against simultaneous + make invocations stomping on each other. I would need to add + some locking mechanism for this. diff --git a/Documentation/howto/recover-corrupted-blob-object.txt b/Documentation/howto/recover-corrupted-blob-object.txt new file mode 100644 index 0000000..1b3b188 --- /dev/null +++ b/Documentation/howto/recover-corrupted-blob-object.txt @@ -0,0 +1,144 @@ +Date: Fri, 9 Nov 2007 08:28:38 -0800 (PST) +From: Linus Torvalds <torvalds@linux-foundation.org> +Subject: corrupt object on git-gc +Abstract: Some tricks to reconstruct blob objects in order to fix + a corrupted repository. +Content-type: text/asciidoc + +How to recover a corrupted blob object +====================================== + +----------------------------------------------------------- +On Fri, 9 Nov 2007, Yossi Leybovich wrote: +> +> Did not help still the repository look for this object? +> Any one know how can I track this object and understand which file is it +----------------------------------------------------------- + +So exactly *because* the SHA-1 hash is cryptographically secure, the hash +itself doesn't actually tell you anything, in order to fix a corrupt +object you basically have to find the "original source" for it. + +The easiest way to do that is almost always to have backups, and find the +same object somewhere else. Backups really are a good idea, and Git makes +it pretty easy (if nothing else, just clone the repository somewhere else, +and make sure that you do *not* use a hard-linked clone, and preferably +not the same disk/machine). + +But since you don't seem to have backups right now, the good news is that +especially with a single blob being corrupt, these things *are* somewhat +debuggable. + +First off, move the corrupt object away, and *save* it. The most common +cause of corruption so far has been memory corruption, but even so, there +are people who would be interested in seeing the corruption - but it's +basically impossible to judge the corruption until we can also see the +original object, so right now the corrupt object is useless, but it's very +interesting for the future, in the hope that you can re-create a +non-corrupt version. + +----------------------------------------------------------- +So: + +> ib]$ mv .git/objects/4b/9458b3786228369c63936db65827de3cc06200 ../ +----------------------------------------------------------- + +This is the right thing to do, although it's usually best to save it under +it's full SHA-1 name (you just dropped the "4b" from the result ;). + +Let's see what that tells us: + +----------------------------------------------------------- +> ib]$ git-fsck --full +> broken link from tree 2d9263c6d23595e7cb2a21e5ebbb53655278dff8 +> to blob 4b9458b3786228369c63936db65827de3cc06200 +> missing blob 4b9458b3786228369c63936db65827de3cc06200 +----------------------------------------------------------- + +Ok, I removed the "dangling commit" messages, because they are just +messages about the fact that you probably have rebased etc, so they're not +at all interesting. But what remains is still very useful. In particular, +we now know which tree points to it! + +Now you can do + + git ls-tree 2d9263c6d23595e7cb2a21e5ebbb53655278dff8 + +which will show something like + + 100644 blob 8d14531846b95bfa3564b58ccfb7913a034323b8 .gitignore + 100644 blob ebf9bf84da0aab5ed944264a5db2a65fe3a3e883 .mailmap + 100644 blob ca442d313d86dc67e0a2e5d584b465bd382cbf5c COPYING + 100644 blob ee909f2cc49e54f0799a4739d24c4cb9151ae453 CREDITS + 040000 tree 0f5f709c17ad89e72bdbbef6ea221c69807009f6 Documentation + 100644 blob 1570d248ad9237e4fa6e4d079336b9da62d9ba32 Kbuild + 100644 blob 1c7c229a092665b11cd46a25dbd40feeb31661d9 MAINTAINERS + ... + +and you should now have a line that looks like + + 10064 blob 4b9458b3786228369c63936db65827de3cc06200 my-magic-file + +in the output. This already tells you a *lot* it tells you what file the +corrupt blob came from! + +Now, it doesn't tell you quite enough, though: it doesn't tell what +*version* of the file didn't get correctly written! You might be really +lucky, and it may be the version that you already have checked out in your +working tree, in which case fixing this problem is really simple, just do + + git hash-object -w my-magic-file + +again, and if it outputs the missing SHA-1 (4b945..) you're now all done! + +But that's the really lucky case, so let's assume that it was some older +version that was broken. How do you tell which version it was? + +The easiest way to do it is to do + + git log --raw --all --full-history -- subdirectory/my-magic-file + +and that will show you the whole log for that file (please realize that +the tree you had may not be the top-level tree, so you need to figure out +which subdirectory it was in on your own), and because you're asking for +raw output, you'll now get something like + + commit abc + Author: + Date: + .. + :100644 100644 4b9458b... newsha... M somedirectory/my-magic-file + + + commit xyz + Author: + Date: + + .. + :100644 100644 oldsha... 4b9458b... M somedirectory/my-magic-file + +and this actually tells you what the *previous* and *subsequent* versions +of that file were! So now you can look at those ("oldsha" and "newsha" +respectively), and hopefully you have done commits often, and can +re-create the missing my-magic-file version by looking at those older and +newer versions! + +If you can do that, you can now recreate the missing object with + + git hash-object -w <recreated-file> + +and your repository is good again! + +(Btw, you could have ignored the fsck, and started with doing a + + git log --raw --all + +and just looked for the sha of the missing object (4b9458b..) in that +whole thing. It's up to you - Git does *have* a lot of information, it is +just missing one particular blob version. + +Trying to recreate trees and especially commits is *much* harder. So you +were lucky that it's a blob. It's quite possible that you can recreate the +thing. + + Linus diff --git a/Documentation/howto/recover-corrupted-object-harder.txt b/Documentation/howto/recover-corrupted-object-harder.txt new file mode 100644 index 0000000..9c4cd09 --- /dev/null +++ b/Documentation/howto/recover-corrupted-object-harder.txt @@ -0,0 +1,479 @@ +Date: Wed, 16 Oct 2013 04:34:01 -0400 +From: Jeff King <peff@peff.net> +Subject: pack corruption post-mortem +Abstract: Recovering a corrupted object when no good copy is available. +Content-type: text/asciidoc + +How to recover an object from scratch +===================================== + +I was recently presented with a repository with a corrupted packfile, +and was asked if the data was recoverable. This post-mortem describes +the steps I took to investigate and fix the problem. I thought others +might find the process interesting, and it might help somebody in the +same situation. + +******************************** +Note: In this case, no good copy of the repository was available. For +the much easier case where you can get the corrupted object from +elsewhere, see link:recover-corrupted-blob-object.html[this howto]. +******************************** + +I started with an fsck, which found a problem with exactly one object +(I've used $pack and $obj below to keep the output readable, and also +because I'll refer to them later): + +----------- + $ git fsck + error: $pack SHA1 checksum mismatch + error: index CRC mismatch for object $obj from $pack at offset 51653873 + error: inflate: data stream error (incorrect data check) + error: cannot unpack $obj from $pack at offset 51653873 +----------- + +The pack checksum failing means a byte is munged somewhere, and it is +presumably in the object mentioned (since both the index checksum and +zlib were failing). + +Reading the zlib source code, I found that "incorrect data check" means +that the adler-32 checksum at the end of the zlib data did not match the +inflated data. So stepping the data through zlib would not help, as it +did not fail until the very end, when we realize the CRC does not match. +The problematic bytes could be anywhere in the object data. + +The first thing I did was pull the broken data out of the packfile. I +needed to know how big the object was, which I found out with: + +------------ + $ git show-index <$idx | cut -d' ' -f1 | sort -n | grep -A1 51653873 + 51653873 + 51664736 +------------ + +Show-index gives us the list of objects and their offsets. We throw away +everything but the offsets, and then sort them so that our interesting +offset (which we got from the fsck output above) is followed immediately +by the offset of the next object. Now we know that the object data is +10863 bytes long, and we can grab it with: + +------------ + dd if=$pack of=object bs=1 skip=51653873 count=10863 +------------ + +I inspected a hexdump of the data, looking for any obvious bogosity +(e.g., a 4K run of zeroes would be a good sign of filesystem +corruption). But everything looked pretty reasonable. + +Note that the "object" file isn't fit for feeding straight to zlib; it +has the git packed object header, which is variable-length. We want to +strip that off so we can start playing with the zlib data directly. You +can either work your way through it manually (the format is described in +link:../technical/pack-format.html[Documentation/technical/pack-format.txt]), +or you can walk through it in a debugger. I did the latter, creating a +valid pack like: + +------------ + # pack magic and version + printf 'PACK\0\0\0\2' >tmp.pack + # pack has one object + printf '\0\0\0\1' >>tmp.pack + # now add our object data + cat object >>tmp.pack + # and then append the pack trailer + /path/to/git.git/test-sha1 -b <tmp.pack >trailer + cat trailer >>tmp.pack +------------ + +and then running "git index-pack tmp.pack" in the debugger (stop at +unpack_raw_entry). Doing this, I found that there were 3 bytes of header +(and the header itself had a sane type and size). So I stripped those +off with: + +------------ + dd if=object of=zlib bs=1 skip=3 +------------ + +I ran the result through zlib's inflate using a custom C program. And +while it did report the error, I did get the right number of output +bytes (i.e., it matched git's size header that we decoded above). But +feeding the result back to "git hash-object" didn't produce the same +sha1. So there were some wrong bytes, but I didn't know which. The file +happened to be C source code, so I hoped I could notice something +obviously wrong with it, but I didn't. I even got it to compile! + +I also tried comparing it to other versions of the same path in the +repository, hoping that there would be some part of the diff that didn't +make sense. Unfortunately, this happened to be the only revision of this +particular file in the repository, so I had nothing to compare against. + +So I took a different approach. Working under the guess that the +corruption was limited to a single byte, I wrote a program to munge each +byte individually, and try inflating the result. Since the object was +only 10K compressed, that worked out to about 2.5M attempts, which took +a few minutes. + +The program I used is here: + +---------------------------------------------- +#include <stdio.h> +#include <unistd.h> +#include <string.h> +#include <signal.h> +#include <zlib.h> + +static int try_zlib(unsigned char *buf, int len) +{ + /* make this absurdly large so we don't have to loop */ + static unsigned char out[1024*1024]; + z_stream z; + int ret; + + memset(&z, 0, sizeof(z)); + inflateInit(&z); + + z.next_in = buf; + z.avail_in = len; + z.next_out = out; + z.avail_out = sizeof(out); + + ret = inflate(&z, 0); + inflateEnd(&z); + return ret >= 0; +} + +/* eye candy */ +static int counter = 0; +static void progress(int sig) +{ + fprintf(stderr, "\r%d", counter); + alarm(1); +} + +int main(void) +{ + /* oversized so we can read the whole buffer in */ + unsigned char buf[1024*1024]; + int len; + unsigned i, j; + + signal(SIGALRM, progress); + alarm(1); + + len = read(0, buf, sizeof(buf)); + for (i = 0; i < len; i++) { + unsigned char c = buf[i]; + for (j = 0; j <= 0xff; j++) { + buf[i] = j; + + counter++; + if (try_zlib(buf, len)) + printf("i=%d, j=%x\n", i, j); + } + buf[i] = c; + } + + alarm(0); + fprintf(stderr, "\n"); + return 0; +} +---------------------------------------------- + +I compiled and ran with: + +------- + gcc -Wall -Werror -O3 munge.c -o munge -lz + ./munge <zlib +------- + + +There were a few false positives early on (if you write "no data" in the +zlib header, zlib thinks it's just fine :) ). But I got a hit about +halfway through: + +------- + i=5642, j=c7 +------- + +I let it run to completion, and got a few more hits at the end (where it +was munging the CRC to match our broken data). So there was a good +chance this middle hit was the source of the problem. + +I confirmed by tweaking the byte in a hex editor, zlib inflating the +result (no errors!), and then piping the output into "git hash-object", +which reported the sha1 of the broken object. Success! + +I fixed the packfile itself with: + +------- + chmod +w $pack + printf '\xc7' | dd of=$pack bs=1 seek=51659518 conv=notrunc + chmod -w $pack +------- + +The `\xc7` comes from the replacement byte our "munge" program found. +The offset 51659518 is derived by taking the original object offset +(51653873), adding the replacement offset found by "munge" (5642), and +then adding back in the 3 bytes of git header we stripped. + +After that, "git fsck" ran clean. + +As for the corruption itself, I was lucky that it was indeed a single +byte. In fact, it turned out to be a single bit. The byte 0xc7 was +corrupted to 0xc5. So presumably it was caused by faulty hardware, or a +cosmic ray. + +And the aborted attempt to look at the inflated output to see what was +wrong? I could have looked forever and never found it. Here's the diff +between what the corrupted data inflates to, versus the real data: + +-------------- + - cp = strtok (arg, "+"); + + cp = strtok (arg, "."); +-------------- + +It tweaked one byte and still ended up as valid, readable C that just +happened to do something totally different! One takeaway is that on a +less unlucky day, looking at the zlib output might have actually been +helpful, as most random changes would actually break the C code. + +But more importantly, git's hashing and checksumming noticed a problem +that easily could have gone undetected in another system. The result +still compiled, but would have caused an interesting bug (that would +have been blamed on some random commit). + + +The adventure continues... +-------------------------- + +I ended up doing this again! Same entity, new hardware. The assumption +at this point is that the old disk corrupted the packfile, and then the +corruption was migrated to the new hardware (because it was done by +rsync or similar, and no fsck was done at the time of migration). + +This time, the affected blob was over 20 megabytes, which was far too +large to do a brute-force on. I followed the instructions above to +create the `zlib` file. I then used the `inflate` program below to pull +the corrupted data from that. Examining that output gave me a hint about +where in the file the corruption was. But now I was working with the +file itself, not the zlib contents. So knowing the sha1 of the object +and the approximate area of the corruption, I used the `sha1-munge` +program below to brute-force the correct byte. + +Here's the inflate program (it's essentially `gunzip` but without the +`.gz` header processing): + +-------------------------- +#include <stdio.h> +#include <string.h> +#include <zlib.h> +#include <stdlib.h> + +int main(int argc, char **argv) +{ + /* + * oversized so we can read the whole buffer in; + * this could actually be switched to streaming + * to avoid any memory limitations + */ + static unsigned char buf[25 * 1024 * 1024]; + static unsigned char out[25 * 1024 * 1024]; + int len; + z_stream z; + int ret; + + len = read(0, buf, sizeof(buf)); + memset(&z, 0, sizeof(z)); + inflateInit(&z); + + z.next_in = buf; + z.avail_in = len; + z.next_out = out; + z.avail_out = sizeof(out); + + ret = inflate(&z, 0); + if (ret != Z_OK && ret != Z_STREAM_END) + fprintf(stderr, "initial inflate failed (%d)\n", ret); + + fprintf(stderr, "outputting %lu bytes", z.total_out); + fwrite(out, 1, z.total_out, stdout); + return 0; +} +-------------------------- + +And here is the `sha1-munge` program: + +-------------------------- +#include <stdio.h> +#include <unistd.h> +#include <string.h> +#include <signal.h> +#include <openssl/sha.h> +#include <stdlib.h> + +/* eye candy */ +static int counter = 0; +static void progress(int sig) +{ + fprintf(stderr, "\r%d", counter); + alarm(1); +} + +static const signed char hexval_table[256] = { + -1, -1, -1, -1, -1, -1, -1, -1, /* 00-07 */ + -1, -1, -1, -1, -1, -1, -1, -1, /* 08-0f */ + -1, -1, -1, -1, -1, -1, -1, -1, /* 10-17 */ + -1, -1, -1, -1, -1, -1, -1, -1, /* 18-1f */ + -1, -1, -1, -1, -1, -1, -1, -1, /* 20-27 */ + -1, -1, -1, -1, -1, -1, -1, -1, /* 28-2f */ + 0, 1, 2, 3, 4, 5, 6, 7, /* 30-37 */ + 8, 9, -1, -1, -1, -1, -1, -1, /* 38-3f */ + -1, 10, 11, 12, 13, 14, 15, -1, /* 40-47 */ + -1, -1, -1, -1, -1, -1, -1, -1, /* 48-4f */ + -1, -1, -1, -1, -1, -1, -1, -1, /* 50-57 */ + -1, -1, -1, -1, -1, -1, -1, -1, /* 58-5f */ + -1, 10, 11, 12, 13, 14, 15, -1, /* 60-67 */ + -1, -1, -1, -1, -1, -1, -1, -1, /* 68-67 */ + -1, -1, -1, -1, -1, -1, -1, -1, /* 70-77 */ + -1, -1, -1, -1, -1, -1, -1, -1, /* 78-7f */ + -1, -1, -1, -1, -1, -1, -1, -1, /* 80-87 */ + -1, -1, -1, -1, -1, -1, -1, -1, /* 88-8f */ + -1, -1, -1, -1, -1, -1, -1, -1, /* 90-97 */ + -1, -1, -1, -1, -1, -1, -1, -1, /* 98-9f */ + -1, -1, -1, -1, -1, -1, -1, -1, /* a0-a7 */ + -1, -1, -1, -1, -1, -1, -1, -1, /* a8-af */ + -1, -1, -1, -1, -1, -1, -1, -1, /* b0-b7 */ + -1, -1, -1, -1, -1, -1, -1, -1, /* b8-bf */ + -1, -1, -1, -1, -1, -1, -1, -1, /* c0-c7 */ + -1, -1, -1, -1, -1, -1, -1, -1, /* c8-cf */ + -1, -1, -1, -1, -1, -1, -1, -1, /* d0-d7 */ + -1, -1, -1, -1, -1, -1, -1, -1, /* d8-df */ + -1, -1, -1, -1, -1, -1, -1, -1, /* e0-e7 */ + -1, -1, -1, -1, -1, -1, -1, -1, /* e8-ef */ + -1, -1, -1, -1, -1, -1, -1, -1, /* f0-f7 */ + -1, -1, -1, -1, -1, -1, -1, -1, /* f8-ff */ +}; + +static inline unsigned int hexval(unsigned char c) +{ +return hexval_table[c]; +} + +static int get_sha1_hex(const char *hex, unsigned char *sha1) +{ + int i; + for (i = 0; i < 20; i++) { + unsigned int val; + /* + * hex[1]=='\0' is caught when val is checked below, + * but if hex[0] is NUL we have to avoid reading + * past the end of the string: + */ + if (!hex[0]) + return -1; + val = (hexval(hex[0]) << 4) | hexval(hex[1]); + if (val & ~0xff) + return -1; + *sha1++ = val; + hex += 2; + } + return 0; +} + +int main(int argc, char **argv) +{ + /* oversized so we can read the whole buffer in */ + static unsigned char buf[25 * 1024 * 1024]; + char header[32]; + int header_len; + unsigned char have[20], want[20]; + int start, len; + SHA_CTX orig; + unsigned i, j; + + if (!argv[1] || get_sha1_hex(argv[1], want)) { + fprintf(stderr, "usage: sha1-munge <sha1> [start] <file.in\n"); + return 1; + } + + if (argv[2]) + start = atoi(argv[2]); + else + start = 0; + + len = read(0, buf, sizeof(buf)); + header_len = sprintf(header, "blob %d", len) + 1; + fprintf(stderr, "using header: %s\n", header); + + /* + * We keep a running sha1 so that if you are munging + * near the end of the file, we do not have to re-sha1 + * the unchanged earlier bytes + */ + SHA1_Init(&orig); + SHA1_Update(&orig, header, header_len); + if (start) + SHA1_Update(&orig, buf, start); + + signal(SIGALRM, progress); + alarm(1); + + for (i = start; i < len; i++) { + unsigned char c; + SHA_CTX x; + +#if 0 + /* + * deletion -- this would not actually work in practice, + * I think, because we've already committed to a + * particular size in the header. Ditto for addition + * below. In those cases, you'd have to do the whole + * sha1 from scratch, or possibly keep three running + * "orig" sha1 computations going. + */ + memcpy(&x, &orig, sizeof(x)); + SHA1_Update(&x, buf + i + 1, len - i - 1); + SHA1_Final(have, &x); + if (!memcmp(have, want, 20)) + printf("i=%d, deletion\n", i); +#endif + + /* + * replacement -- note that this tries each of the 256 + * possible bytes. If you suspect a single-bit flip, + * it would be much shorter to just try the 8 + * bit-flipped variants. + */ + c = buf[i]; + for (j = 0; j <= 0xff; j++) { + buf[i] = j; + + memcpy(&x, &orig, sizeof(x)); + SHA1_Update(&x, buf + i, len - i); + SHA1_Final(have, &x); + if (!memcmp(have, want, 20)) + printf("i=%d, j=%02x\n", i, j); + } + buf[i] = c; + +#if 0 + /* addition */ + for (j = 0; j <= 0xff; j++) { + unsigned char extra = j; + memcpy(&x, &orig, sizeof(x)); + SHA1_Update(&x, &extra, 1); + SHA1_Update(&x, buf + i, len - i); + SHA1_Final(have, &x); + if (!memcmp(have, want, 20)) + printf("i=%d, addition=%02x", i, j); + } +#endif + + SHA1_Update(&orig, buf + i, 1); + counter++; + } + + alarm(0); + fprintf(stderr, "\r%d\n", counter); + return 0; +} +-------------------------- diff --git a/Documentation/howto/revert-a-faulty-merge.txt b/Documentation/howto/revert-a-faulty-merge.txt new file mode 100644 index 0000000..462255e --- /dev/null +++ b/Documentation/howto/revert-a-faulty-merge.txt @@ -0,0 +1,273 @@ +Date: Fri, 19 Dec 2008 00:45:19 -0800 +From: Linus Torvalds <torvalds@linux-foundation.org>, Junio C Hamano <gitster@pobox.com> +Subject: Re: Odd merge behaviour involving reverts +Abstract: Sometimes a branch that was already merged to the mainline + is later found to be faulty. Linus and Junio give guidance on + recovering from such a premature merge and continuing development + after the offending branch is fixed. +Message-ID: <7vocz8a6zk.fsf@gitster.siamese.dyndns.org> +References: <alpine.LFD.2.00.0812181949450.14014@localhost.localdomain> +Content-type: text/asciidoc + +How to revert a faulty merge +============================ + +Alan <alan@clueserver.org> said: + + I have a master branch. We have a branch off of that that some + developers are doing work on. They claim it is ready. We merge it + into the master branch. It breaks something so we revert the merge. + They make changes to the code. they get it to a point where they say + it is ok and we merge again. + + When examined, we find that code changes made before the revert are + not in the master branch, but code changes after are in the master + branch. + +and asked for help recovering from this situation. + +The history immediately after the "revert of the merge" would look like +this: + + ---o---o---o---M---x---x---W + / + ---A---B + +where A and B are on the side development that was not so good, M is the +merge that brings these premature changes into the mainline, x are changes +unrelated to what the side branch did and already made on the mainline, +and W is the "revert of the merge M" (doesn't W look M upside down?). +IOW, `"diff W^..W"` is similar to `"diff -R M^..M"`. + +Such a "revert" of a merge can be made with: + + $ git revert -m 1 M + +After the developers of the side branch fix their mistakes, the history +may look like this: + + ---o---o---o---M---x---x---W---x + / + ---A---B-------------------C---D + +where C and D are to fix what was broken in A and B, and you may already +have some other changes on the mainline after W. + +If you merge the updated side branch (with D at its tip), none of the +changes made in A or B will be in the result, because they were reverted +by W. That is what Alan saw. + +Linus explains the situation: + + Reverting a regular commit just effectively undoes what that commit + did, and is fairly straightforward. But reverting a merge commit also + undoes the _data_ that the commit changed, but it does absolutely + nothing to the effects on _history_ that the merge had. + + So the merge will still exist, and it will still be seen as joining + the two branches together, and future merges will see that merge as + the last shared state - and the revert that reverted the merge brought + in will not affect that at all. + + So a "revert" undoes the data changes, but it's very much _not_ an + "undo" in the sense that it doesn't undo the effects of a commit on + the repository history. + + So if you think of "revert" as "undo", then you're going to always + miss this part of reverts. Yes, it undoes the data, but no, it doesn't + undo history. + +In such a situation, you would want to first revert the previous revert, +which would make the history look like this: + + ---o---o---o---M---x---x---W---x---Y + / + ---A---B-------------------C---D + +where Y is the revert of W. Such a "revert of the revert" can be done +with: + + $ git revert W + +This history would (ignoring possible conflicts between what W and W..Y +changed) be equivalent to not having W or Y at all in the history: + + ---o---o---o---M---x---x-------x---- + / + ---A---B-------------------C---D + +and merging the side branch again will not have conflict arising from an +earlier revert and revert of the revert. + + ---o---o---o---M---x---x-------x-------* + / / + ---A---B-------------------C---D + +Of course the changes made in C and D still can conflict with what was +done by any of the x, but that is just a normal merge conflict. + +On the other hand, if the developers of the side branch discarded their +faulty A and B, and redone the changes on top of the updated mainline +after the revert, the history would have looked like this: + + ---o---o---o---M---x---x---W---x---x + / \ + ---A---B A'--B'--C' + +If you reverted the revert in such a case as in the previous example: + + ---o---o---o---M---x---x---W---x---x---Y---* + / \ / + ---A---B A'--B'--C' + +where Y is the revert of W, A' and B' are rerolled A and B, and there may +also be a further fix-up C' on the side branch. `"diff Y^..Y"` is similar +to `"diff -R W^..W"` (which in turn means it is similar to `"diff M^..M"`), +and `"diff A'^..C'"` by definition would be similar but different from that, +because it is a rerolled series of the earlier change. There will be a +lot of overlapping changes that result in conflicts. So do not do "revert +of revert" blindly without thinking.. + + ---o---o---o---M---x---x---W---x---x + / \ + ---A---B A'--B'--C' + +In the history with rebased side branch, W (and M) are behind the merge +base of the updated branch and the tip of the mainline, and they should +merge without the past faulty merge and its revert getting in the way. + +To recap, these are two very different scenarios, and they want two very +different resolution strategies: + + - If the faulty side branch was fixed by adding corrections on top, then + doing a revert of the previous revert would be the right thing to do. + + - If the faulty side branch whose effects were discarded by an earlier + revert of a merge was rebuilt from scratch (i.e. rebasing and fixing, + as you seem to have interpreted), then re-merging the result without + doing anything else fancy would be the right thing to do. + (See the ADDENDUM below for how to rebuild a branch from scratch + without changing its original branching-off point.) + +However, there are things to keep in mind when reverting a merge (and +reverting such a revert). + +For example, think about what reverting a merge (and then reverting the +revert) does to bisectability. Ignore the fact that the revert of a revert +is undoing it - just think of it as a "single commit that does a lot". +Because that is what it does. + +When you have a problem you are chasing down, and you hit a "revert this +merge", what you're hitting is essentially a single commit that contains +all the changes (but obviously in reverse) of all the commits that got +merged. So it's debugging hell, because now you don't have lots of small +changes that you can try to pinpoint which _part_ of it changes. + +But does it all work? Sure it does. You can revert a merge, and from a +purely technical angle, Git did it very naturally and had no real +troubles. It just considered it a change from "state before merge" to +"state after merge", and that was it. Nothing complicated, nothing odd, +nothing really dangerous. Git will do it without even thinking about it. + +So from a technical angle, there's nothing wrong with reverting a merge, +but from a workflow angle it's something that you generally should try to +avoid. + +If at all possible, for example, if you find a problem that got merged +into the main tree, rather than revert the merge, try _really_ hard to +bisect the problem down into the branch you merged, and just fix it, or +try to revert the individual commit that caused it. + +Yes, it's more complex, and no, it's not always going to work (sometimes +the answer is: "oops, I really shouldn't have merged it, because it wasn't +ready yet, and I really need to undo _all_ of the merge"). So then you +really should revert the merge, but when you want to re-do the merge, you +now need to do it by reverting the revert. + +ADDENDUM + +Sometimes you have to rewrite one of a topic branch's commits *and* you can't +change the topic's branching-off point. Consider the following situation: + + P---o---o---M---x---x---W---x + \ / + A---B---C + +where commit W reverted commit M because it turned out that commit B was wrong +and needs to be rewritten, but you need the rewritten topic to still branch +from commit P (perhaps P is a branching-off point for yet another branch, and +you want be able to merge the topic into both branches). + +The natural thing to do in this case is to checkout the A-B-C branch and use +"rebase -i P" to change commit B. However this does not rewrite commit A, +because "rebase -i" by default fast-forwards over any initial commits selected +with the "pick" command. So you end up with this: + + P---o---o---M---x---x---W---x + \ / + A---B---C <-- old branch + \ + B'---C' <-- naively rewritten branch + +To merge A-B'-C' into the mainline branch you would still have to first revert +commit W in order to pick up the changes in A, but then it's likely that the +changes in B' will conflict with the original B changes re-introduced by the +reversion of W. + +However, you can avoid these problems if you recreate the entire branch, +including commit A: + + A'---B'---C' <-- completely rewritten branch + / + P---o---o---M---x---x---W---x + \ / + A---B---C + +You can merge A'-B'-C' into the mainline branch without worrying about first +reverting W. Mainline's history would look like this: + + A'---B'---C'------------------ + / \ + P---o---o---M---x---x---W---x---M2 + \ / + A---B---C + +But if you don't actually need to change commit A, then you need some way to +recreate it as a new commit with the same changes in it. The rebase command's +--no-ff option provides a way to do this: + + $ git rebase [-i] --no-ff P + +The --no-ff option creates a new branch A'-B'-C' with all-new commits (all the +SHA IDs will be different) even if in the interactive case you only actually +modify commit B. You can then merge this new branch directly into the mainline +branch and be sure you'll get all of the branch's changes. + +You can also use --no-ff in cases where you just add extra commits to the topic +to fix it up. Let's revisit the situation discussed at the start of this howto: + + P---o---o---M---x---x---W---x + \ / + A---B---C----------------D---E <-- fixed-up topic branch + +At this point, you can use --no-ff to recreate the topic branch: + + $ git checkout E + $ git rebase --no-ff P + +yielding + + A'---B'---C'------------D'---E' <-- recreated topic branch + / + P---o---o---M---x---x---W---x + \ / + A---B---C----------------D---E + +You can merge the recreated branch into the mainline without reverting commit W, +and mainline's history will look like this: + + A'---B'---C'------------D'---E' + / \ + P---o---o---M---x---x---W---x---M2 + \ / + A---B---C diff --git a/Documentation/howto/revert-branch-rebase.txt b/Documentation/howto/revert-branch-rebase.txt new file mode 100644 index 0000000..149508e --- /dev/null +++ b/Documentation/howto/revert-branch-rebase.txt @@ -0,0 +1,187 @@ +From: Junio C Hamano <gitster@pobox.com> +To: git@vger.kernel.org +Subject: [HOWTO] Reverting an existing commit +Abstract: In this article, JC gives a small real-life example of using + 'git revert' command, and using a temporary branch and tag for safety + and easier sanity checking. +Date: Mon, 29 Aug 2005 21:39:02 -0700 +Content-type: text/asciidoc +Message-ID: <7voe7g3uop.fsf@assigned-by-dhcp.cox.net> + +How to revert an existing commit +================================ + +One of the changes I pulled into the 'master' branch turns out to +break building Git with GCC 2.95. While they were well-intentioned +portability fixes, keeping things working with gcc-2.95 was also +important. Here is what I did to revert the change in the 'master' +branch and to adjust the 'pu' branch, using core Git tools and +barebone Porcelain. + +First, prepare a throw-away branch in case I screw things up. + +------------------------------------------------ +$ git checkout -b revert-c99 master +------------------------------------------------ + +Now I am on the 'revert-c99' branch. Let's figure out which commit to +revert. I happen to know that the top of the 'master' branch is a +merge, and its second parent (i.e. foreign commit I merged from) has +the change I would want to undo. Further I happen to know that that +merge introduced 5 commits or so: + +------------------------------------------------ +$ git show-branch --more=4 master master^2 | head +* [master] Merge refs/heads/portable from http://www.cs.berkeley.... + ! [master^2] Replace C99 array initializers with code. +-- +- [master] Merge refs/heads/portable from http://www.cs.berkeley.... +*+ [master^2] Replace C99 array initializers with code. +*+ [master^2~1] Replace unsetenv() and setenv() with older putenv(). +*+ [master^2~2] Include sys/time.h in daemon.c. +*+ [master^2~3] Fix ?: statements. +*+ [master^2~4] Replace zero-length array decls with []. +* [master~1] tutorial note about git branch +------------------------------------------------ + +The '--more=4' above means "after we reach the merge base of refs, +show until we display four more common commits". That last commit +would have been where the "portable" branch was forked from the main +git.git repository, so this would show everything on both branches +since then. I just limited the output to the first handful using +'head'. + +Now I know 'master^2~4' (pronounce it as "find the second parent of +the 'master', and then go four generations back following the first +parent") is the one I would want to revert. Since I also want to say +why I am reverting it, the '-n' flag is given to 'git revert'. This +prevents it from actually making a commit, and instead 'git revert' +leaves the commit log message it wanted to use in '.msg' file: + +------------------------------------------------ +$ git revert -n master^2~4 +$ cat .msg +Revert "Replace zero-length array decls with []." + +This reverts 6c5f9baa3bc0d63e141e0afc23110205379905a4 commit. +$ git diff HEAD ;# to make sure what we are reverting makes sense. +$ make CC=gcc-2.95 clean test ;# make sure it fixed the breakage. +$ make clean test ;# make sure it did not cause other breakage. +------------------------------------------------ + +The reverted change makes sense (from reading the 'diff' output), does +fix the problem (from 'make CC=gcc-2.95' test), and does not cause new +breakage (from the last 'make test'). I'm ready to commit: + +------------------------------------------------ +$ git commit -a -s ;# read .msg into the log, + # and explain why I am reverting. +------------------------------------------------ + +I could have screwed up in any of the above steps, but in the worst +case I could just have done 'git checkout master' to start over. +Fortunately I did not have to; what I have in the current branch +'revert-c99' is what I want. So merge that back into 'master': + +------------------------------------------------ +$ git checkout master +$ git merge revert-c99 ;# this should be a fast-forward +Updating from 10d781b9caa4f71495c7b34963bef137216f86a8 to e3a693c... + cache.h | 8 ++++---- + commit.c | 2 +- + ls-files.c | 2 +- + receive-pack.c | 2 +- + server-info.c | 2 +- + 5 files changed, 8 insertions(+), 8 deletions(-) +------------------------------------------------ + +There is no need to redo the test at this point. We fast-forwarded +and we know 'master' matches 'revert-c99' exactly. In fact: + +------------------------------------------------ +$ git diff master..revert-c99 +------------------------------------------------ + +says nothing. + +Then we rebase the 'pu' branch as usual. + +------------------------------------------------ +$ git checkout pu +$ git tag pu-anchor pu +$ git rebase master +* Applying: Redo "revert" using three-way merge machinery. +First trying simple merge strategy to cherry-pick. +* Applying: Remove git-apply-patch-script. +First trying simple merge strategy to cherry-pick. +Simple cherry-pick fails; trying Automatic cherry-pick. +Removing Documentation/git-apply-patch-script.txt +Removing git-apply-patch-script +* Applying: Document "git cherry-pick" and "git revert" +First trying simple merge strategy to cherry-pick. +* Applying: mailinfo and applymbox updates +First trying simple merge strategy to cherry-pick. +* Applying: Show commits in topo order and name all commits. +First trying simple merge strategy to cherry-pick. +* Applying: More documentation updates. +First trying simple merge strategy to cherry-pick. +------------------------------------------------ + +The temporary tag 'pu-anchor' is me just being careful, in case 'git +rebase' screws up. After this, I can do these for sanity check: + +------------------------------------------------ +$ git diff pu-anchor..pu ;# make sure we got the master fix. +$ make CC=gcc-2.95 clean test ;# make sure it fixed the breakage. +$ make clean test ;# make sure it did not cause other breakage. +------------------------------------------------ + +Everything is in the good order. I do not need the temporary branch +or tag anymore, so remove them: + +------------------------------------------------ +$ rm -f .git/refs/tags/pu-anchor +$ git branch -d revert-c99 +------------------------------------------------ + +It was an emergency fix, so we might as well merge it into the +'release candidate' branch, although I expect the next release would +be some days off: + +------------------------------------------------ +$ git checkout rc +$ git pull . master +Packing 0 objects +Unpacking 0 objects + +* commit-ish: e3a693c... refs/heads/master from . +Trying to merge e3a693c... into 8c1f5f0... using 10d781b... +Committed merge 7fb9b7262a1d1e0a47bbfdcbbcf50ce0635d3f8f + cache.h | 8 ++++---- + commit.c | 2 +- + ls-files.c | 2 +- + receive-pack.c | 2 +- + server-info.c | 2 +- + 5 files changed, 8 insertions(+), 8 deletions(-) +------------------------------------------------ + +And the final repository status looks like this: + +------------------------------------------------ +$ git show-branch --more=1 master pu rc +! [master] Revert "Replace zero-length array decls with []." + ! [pu] git-repack: Add option to repack all objects. + * [rc] Merge refs/heads/master from . +--- + + [pu] git-repack: Add option to repack all objects. + + [pu~1] More documentation updates. + + [pu~2] Show commits in topo order and name all commits. + + [pu~3] mailinfo and applymbox updates + + [pu~4] Document "git cherry-pick" and "git revert" + + [pu~5] Remove git-apply-patch-script. + + [pu~6] Redo "revert" using three-way merge machinery. + - [rc] Merge refs/heads/master from . +++* [master] Revert "Replace zero-length array decls with []." + - [rc~1] Merge refs/heads/master from . +... [master~1] Merge refs/heads/portable from http://www.cs.berkeley.... +------------------------------------------------ diff --git a/Documentation/howto/separating-topic-branches.txt b/Documentation/howto/separating-topic-branches.txt new file mode 100644 index 0000000..bd10274 --- /dev/null +++ b/Documentation/howto/separating-topic-branches.txt @@ -0,0 +1,94 @@ +From: Junio C Hamano <gitster@pobox.com> +Subject: Separating topic branches +Abstract: In this article, JC describes how to separate topic branches. +Content-type: text/asciidoc + +How to separate topic branches +============================== + +This text was originally a footnote to a discussion about the +behaviour of the git diff commands. + +Often I find myself doing that [running diff against something other +than HEAD] while rewriting messy development history. For example, I +start doing some work without knowing exactly where it leads, and end +up with a history like this: + + "master" + o---o + \ "topic" + o---o---o---o---o---o + +At this point, "topic" contains something I know I want, but it +contains two concepts that turned out to be completely independent. +And often, one topic component is larger than the other. It may +contain more than two topics. + +In order to rewrite this mess to be more manageable, I would first do +"diff master..topic", to extract the changes into a single patch, start +picking pieces from it to get logically self-contained units, and +start building on top of "master": + + $ git diff master..topic >P.diff + $ git checkout -b topicA master + ... pick and apply pieces from P.diff to build + ... commits on topicA branch. + + o---o---o + / "topicA" + o---o"master" + \ "topic" + o---o---o---o---o---o + +Before doing each commit on "topicA" HEAD, I run "diff HEAD" +before update-index the affected paths, or "diff --cached HEAD" +after. Also I would run "diff --cached master" to make sure +that the changes are only the ones related to "topicA". Usually +I do this for smaller topics first. + +After that, I'd do the remainder of the original "topic", but +for that, I do not start from the patchfile I extracted by +comparing "master" and "topic" I used initially. Still on +"topicA", I extract "diff topic", and use it to rebuild the +other topic: + + $ git diff -R topic >P.diff ;# --cached also would work fine + $ git checkout -b topicB master + ... pick and apply pieces from P.diff to build + ... commits on topicB branch. + + "topicB" + o---o---o---o---o + / + /o---o---o + |/ "topicA" + o---o"master" + \ "topic" + o---o---o---o---o---o + +After I am done, I'd try a pretend-merge between "topicA" and +"topicB" in order to make sure I have not missed anything: + + $ git pull . topicA ;# merge it into current "topicB" + $ git diff topic + "topicB" + o---o---o---o---o---* (pretend merge) + / / + /o---o---o----------' + |/ "topicA" + o---o"master" + \ "topic" + o---o---o---o---o---o + +The last diff better not to show anything other than cleanups +for crufts. Then I can finally clean things up: + + $ git branch -D topic + $ git reset --hard HEAD^ ;# nuke pretend merge + + "topicB" + o---o---o---o---o + / + /o---o---o + |/ "topicA" + o---o"master" diff --git a/Documentation/howto/setup-git-server-over-http.txt b/Documentation/howto/setup-git-server-over-http.txt new file mode 100644 index 0000000..f44e5e9 --- /dev/null +++ b/Documentation/howto/setup-git-server-over-http.txt @@ -0,0 +1,285 @@ +From: Rutger Nijlunsing <rutger@nospam.com> +Subject: Setting up a Git repository which can be pushed into and pulled from over HTTP(S). +Date: Thu, 10 Aug 2006 22:00:26 +0200 +Content-type: text/asciidoc + +How to setup Git server over http +================================= + +NOTE: This document is from 2006. A lot has happened since then, and this +document is now relevant mainly if your web host is not CGI capable. +Almost everyone else should instead look at linkgit:git-http-backend[1]. + +Since Apache is one of those packages people like to compile +themselves while others prefer the bureaucrat's dream Debian, it is +impossible to give guidelines which will work for everyone. Just send +some feedback to the mailing list at git@vger.kernel.org to get this +document tailored to your favorite distro. + + +What's needed: + +- Have an Apache web-server + + On Debian: + $ apt-get install apache2 + To get apache2 by default started, + edit /etc/default/apache2 and set NO_START=0 + +- can edit the configuration of it. + + This could be found under /etc/httpd, or refer to your Apache documentation. + + On Debian: this means being able to edit files under /etc/apache2 + +- can restart it. + + 'apachectl --graceful' might do. If it doesn't, just stop and + restart apache. Be warning that active connections to your server + might be aborted by this. + + On Debian: + $ /etc/init.d/apache2 restart + or + $ /etc/init.d/apache2 force-reload + (which seems to do the same) + This adds symlinks from the /etc/apache2/mods-enabled to + /etc/apache2/mods-available. + +- have permissions to chown a directory + +- have Git installed on the client, and + +- either have Git installed on the server or have a webdav client on + the client. + +In effect, this means you're going to be root, or that you're using a +preconfigured WebDAV server. + + +Step 1: setup a bare Git repository +----------------------------------- + +At the time of writing, git-http-push cannot remotely create a Git +repository. So we have to do that at the server side with Git. Another +option is to generate an empty bare repository at the client and copy +it to the server with a WebDAV client (which is the only option if Git +is not installed on the server). + +Create the directory under the DocumentRoot of the directories served +by Apache. As an example we take /usr/local/apache2, but try "grep +DocumentRoot /where/ever/httpd.conf" to find your root: + + $ cd /usr/local/apache/htdocs + $ mkdir my-new-repo.git + + On Debian: + + $ cd /var/www + $ mkdir my-new-repo.git + + +Initialize a bare repository + + $ cd my-new-repo.git + $ git --bare init + + +Change the ownership to your web-server's credentials. Use `"grep ^User +httpd.conf"` and `"grep ^Group httpd.conf"` to find out: + + $ chown -R www.www . + + On Debian: + + $ chown -R www-data.www-data . + + +If you do not know which user Apache runs as, you can alternatively do +a "chmod -R a+w .", inspect the files which are created later on, and +set the permissions appropriately. + +Restart apache2, and check whether http://server/my-new-repo.git gives +a directory listing. If not, check whether apache started up +successfully. + + +Step 2: enable DAV on this repository +------------------------------------- + +First make sure the dav_module is loaded. For this, insert in httpd.conf: + + LoadModule dav_module libexec/httpd/libdav.so + AddModule mod_dav.c + +Also make sure that this line exists which is the file used for +locking DAV operations: + + DAVLockDB "/usr/local/apache2/temp/DAV.lock" + + On Debian these steps can be performed with: + + Enable the dav and dav_fs modules of apache: + $ a2enmod dav_fs + (just to be sure. dav_fs might be unneeded, I don't know) + $ a2enmod dav + The DAV lock is located in /etc/apache2/mods-available/dav_fs.conf: + DAVLockDB /var/lock/apache2/DAVLock + +Of course, it can point somewhere else, but the string is actually just a +prefix in some Apache configurations, and therefore the _directory_ has to +be writable by the user Apache runs as. + +Then, add something like this to your httpd.conf + + <Location /my-new-repo.git> + DAV on + AuthType Basic + AuthName "Git" + AuthUserFile /usr/local/apache2/conf/passwd.git + Require valid-user + </Location> + + On Debian: + Create (or add to) /etc/apache2/conf.d/git.conf : + + <Location /my-new-repo.git> + DAV on + AuthType Basic + AuthName "Git" + AuthUserFile /etc/apache2/passwd.git + Require valid-user + </Location> + + Debian automatically reads all files under /etc/apache2/conf.d. + +The password file can be somewhere else, but it has to be readable by +Apache and preferably not readable by the world. + +Create this file by + $ htpasswd -c /usr/local/apache2/conf/passwd.git <user> + + On Debian: + $ htpasswd -c /etc/apache2/passwd.git <user> + +You will be asked a password, and the file is created. Subsequent calls +to htpasswd should omit the '-c' option, since you want to append to the +existing file. + +You need to restart Apache. + +Now go to http://<username>@<servername>/my-new-repo.git in your +browser to check whether it asks for a password and accepts the right +password. + +On Debian: + + To test the WebDAV part, do: + + $ apt-get install litmus + $ litmus http://<servername>/my-new-repo.git <username> <password> + + Most tests should pass. + +A command-line tool to test WebDAV is cadaver. If you prefer GUIs, for +example, konqueror can open WebDAV URLs as "webdav://..." or +"webdavs://...". + +If you're into Windows, from XP onwards Internet Explorer supports +WebDAV. For this, do Internet Explorer -> Open Location -> +http://<servername>/my-new-repo.git [x] Open as webfolder -> login . + + +Step 3: setup the client +------------------------ + +Make sure that you have HTTP support, i.e. your Git was built with +libcurl (version more recent than 7.10). The command 'git http-push' with +no argument should display a usage message. + +Then, add the following to your $HOME/.netrc (you can do without, but will be +asked to input your password a _lot_ of times): + + machine <servername> + login <username> + password <password> + +...and set permissions: + chmod 600 ~/.netrc + +If you want to access the web-server by its IP, you have to type that in, +instead of the server name. + +To check whether all is OK, do: + + curl --netrc --location -v http://<username>@<servername>/my-new-repo.git/HEAD + +...this should give something like 'ref: refs/heads/master', which is +the content of the file HEAD on the server. + +Now, add the remote in your existing repository which contains the project +you want to export: + + $ git-config remote.upload.url \ + http://<username>@<servername>/my-new-repo.git/ + +It is important to put the last '/'; Without it, the server will send +a redirect which git-http-push does not (yet) understand, and git-http-push +will repeat the request infinitely. + + +Step 4: make the initial push +----------------------------- + +From your client repository, do + + $ git push upload master + +This pushes branch 'master' (which is assumed to be the branch you +want to export) to repository called 'upload', which we previously +defined with git-config. + + +Using a proxy: +-------------- + +If you have to access the WebDAV server from behind an HTTP(S) proxy, +set the variable 'all_proxy' to 'http://proxy-host.com:port', or +'http://login-on-proxy:passwd-on-proxy@proxy-host.com:port'. See 'man +curl' for details. + + +Troubleshooting: +---------------- + +If git-http-push says + + Error: no DAV locking support on remote repo http://... + +then it means the web-server did not accept your authentication. Make sure +that the user name and password matches in httpd.conf, .netrc and the URL +you are uploading to. + +If git-http-push shows you an error (22/502) when trying to MOVE a blob, +it means that your web-server somehow does not recognize its name in the +request; This can happen when you start Apache, but then disable the +network interface. A simple restart of Apache helps. + +Errors like (22/502) are of format (curl error code/http error +code). So (22/404) means something like 'not found' at the server. + +Reading /usr/local/apache2/logs/error_log is often helpful. + + On Debian: Read /var/log/apache2/error.log instead. + +If you access HTTPS locations, Git may fail verifying the SSL +certificate (this is return code 60). Setting http.sslVerify=false can +help diagnosing the problem, but removes security checks. + + +Debian References: http://www.debian-administration.org/articles/285 + +Authors + Johannes Schindelin <Johannes.Schindelin@gmx.de> + Rutger Nijlunsing <git@wingding.demon.nl> + Matthieu Moy <Matthieu.Moy@imag.fr> diff --git a/Documentation/howto/update-hook-example.txt b/Documentation/howto/update-hook-example.txt new file mode 100644 index 0000000..a5193b1 --- /dev/null +++ b/Documentation/howto/update-hook-example.txt @@ -0,0 +1,192 @@ +From: Junio C Hamano <gitster@pobox.com> and Carl Baldwin <cnb@fc.hp.com> +Subject: control access to branches. +Date: Thu, 17 Nov 2005 23:55:32 -0800 +Message-ID: <7vfypumlu3.fsf@assigned-by-dhcp.cox.net> +Abstract: An example hooks/update script is presented to + implement repository maintenance policies, such as who can push + into which branch and who can make a tag. +Content-type: text/asciidoc + +How to use the update hook +========================== + +When your developer runs git-push into the repository, +git-receive-pack is run (either locally or over ssh) as that +developer, so is hooks/update script. Quoting from the relevant +section of the documentation: + + Before each ref is updated, if $GIT_DIR/hooks/update file exists + and executable, it is called with three parameters: + + $GIT_DIR/hooks/update refname sha1-old sha1-new + + The refname parameter is relative to $GIT_DIR; e.g. for the + master head this is "refs/heads/master". Two sha1 are the + object names for the refname before and after the update. Note + that the hook is called before the refname is updated, so either + sha1-old is 0{40} (meaning there is no such ref yet), or it + should match what is recorded in refname. + +So if your policy is (1) always require fast-forward push +(i.e. never allow "git-push repo +branch:branch"), (2) you +have a list of users allowed to update each branch, and (3) you +do not let tags to be overwritten, then you can use something +like this as your hooks/update script. + +[jc: editorial note. This is a much improved version by Carl +since I posted the original outline] + +---------------------------------------------------- +#!/bin/bash + +umask 002 + +# If you are having trouble with this access control hook script +# you can try setting this to true. It will tell you exactly +# why a user is being allowed/denied access. + +verbose=false + +# Default shell globbing messes things up downstream +GLOBIGNORE=* + +function grant { + $verbose && echo >&2 "-Grant- $1" + echo grant + exit 0 +} + +function deny { + $verbose && echo >&2 "-Deny- $1" + echo deny + exit 1 +} + +function info { + $verbose && echo >&2 "-Info- $1" +} + +# Implement generic branch and tag policies. +# - Tags should not be updated once created. +# - Branches should only be fast-forwarded unless their pattern starts with '+' +case "$1" in + refs/tags/*) + git rev-parse --verify -q "$1" && + deny >/dev/null "You can't overwrite an existing tag" + ;; + refs/heads/*) + # No rebasing or rewinding + if expr "$2" : '0*$' >/dev/null; then + info "The branch '$1' is new..." + else + # updating -- make sure it is a fast-forward + mb=$(git-merge-base "$2" "$3") + case "$mb,$2" in + "$2,$mb") info "Update is fast-forward" ;; + *) noff=y; info "This is not a fast-forward update.";; + esac + fi + ;; + *) + deny >/dev/null \ + "Branch is not under refs/heads or refs/tags. What are you trying to do?" + ;; +esac + +# Implement per-branch controls based on username +allowed_users_file=$GIT_DIR/info/allowed-users +username=$(id -u -n) +info "The user is: '$username'" + +if test -f "$allowed_users_file" +then + rc=$(cat $allowed_users_file | grep -v '^#' | grep -v '^$' | + while read heads user_patterns + do + # does this rule apply to us? + head_pattern=${heads#+} + matchlen=$(expr "$1" : "${head_pattern#+}") + test "$matchlen" = ${#1} || continue + + # if non-ff, $heads must be with the '+' prefix + test -n "$noff" && + test "$head_pattern" = "$heads" && continue + + info "Found matching head pattern: '$head_pattern'" + for user_pattern in $user_patterns; do + info "Checking user: '$username' against pattern: '$user_pattern'" + matchlen=$(expr "$username" : "$user_pattern") + if test "$matchlen" = "${#username}" + then + grant "Allowing user: '$username' with pattern: '$user_pattern'" + fi + done + deny "The user is not in the access list for this branch" + done + ) + case "$rc" in + grant) grant >/dev/null "Granting access based on $allowed_users_file" ;; + deny) deny >/dev/null "Denying access based on $allowed_users_file" ;; + *) ;; + esac +fi + +allowed_groups_file=$GIT_DIR/info/allowed-groups +groups=$(id -G -n) +info "The user belongs to the following groups:" +info "'$groups'" + +if test -f "$allowed_groups_file" +then + rc=$(cat $allowed_groups_file | grep -v '^#' | grep -v '^$' | + while read heads group_patterns + do + # does this rule apply to us? + head_pattern=${heads#+} + matchlen=$(expr "$1" : "${head_pattern#+}") + test "$matchlen" = ${#1} || continue + + # if non-ff, $heads must be with the '+' prefix + test -n "$noff" && + test "$head_pattern" = "$heads" && continue + + info "Found matching head pattern: '$head_pattern'" + for group_pattern in $group_patterns; do + for groupname in $groups; do + info "Checking group: '$groupname' against pattern: '$group_pattern'" + matchlen=$(expr "$groupname" : "$group_pattern") + if test "$matchlen" = "${#groupname}" + then + grant "Allowing group: '$groupname' with pattern: '$group_pattern'" + fi + done + done + deny "None of the user's groups are in the access list for this branch" + done + ) + case "$rc" in + grant) grant >/dev/null "Granting access based on $allowed_groups_file" ;; + deny) deny >/dev/null "Denying access based on $allowed_groups_file" ;; + *) ;; + esac +fi + +deny >/dev/null "There are no more rules to check. Denying access" +---------------------------------------------------- + +This uses two files, $GIT_DIR/info/allowed-users and +allowed-groups, to describe which heads can be pushed into by +whom. The format of each file would look like this: + + refs/heads/master junio + +refs/heads/pu junio + refs/heads/cogito$ pasky + refs/heads/bw/.* linus + refs/heads/tmp/.* .* + refs/tags/v[0-9].* junio + +With this, Linus can push or create "bw/penguin" or "bw/zebra" +or "bw/panda" branches, Pasky can do only "cogito", and JC can +do master and pu branches and make versioned tags. And anybody +can do tmp/blah branches. The '+' sign at the pu record means +that JC can make non-fast-forward pushes on it. diff --git a/Documentation/howto/use-git-daemon.txt b/Documentation/howto/use-git-daemon.txt new file mode 100644 index 0000000..7af2e52 --- /dev/null +++ b/Documentation/howto/use-git-daemon.txt @@ -0,0 +1,54 @@ +Content-type: text/asciidoc + +How to use git-daemon +===================== + +Git can be run in inetd mode and in stand alone mode. But all you want is +let a coworker pull from you, and therefore need to set up a Git server +real quick, right? + +Note that git-daemon is not really chatty at the moment, especially when +things do not go according to plan (e.g. a socket could not be bound). + +Another word of warning: if you run + + $ git ls-remote git://127.0.0.1/rule-the-world.git + +and you see a message like + + fatal: The remote end hung up unexpectedly + +it only means that _something_ went wrong. To find out _what_ went wrong, +you have to ask the server. (Git refuses to be more precise for your +security only. Take off your shoes now. You have any coins in your pockets? +Sorry, not allowed -- who knows what you planned to do with them?) + +With these two caveats, let's see an example: + + $ git daemon --reuseaddr --verbose --base-path=/home/gitte/git \ + --export-all -- /home/gitte/git/rule-the-world.git + +(Of course, unless your user name is `gitte` _and_ your repository is in +~/rule-the-world.git, you have to adjust the paths. If your repository is +not bare, be aware that you have to type the path to the .git directory!) + +This invocation tries to reuse the address if it is already taken +(this can save you some debugging, because otherwise killing and restarting +git-daemon could just silently fail to bind to a socket). + +Also, it is (relatively) verbose when somebody actually connects to it. +It also sets the base path, which means that all the projects which can be +accessed using this daemon have to reside in or under that path. + +The option `--export-all` just means that you _don't_ have to create a +file named `git-daemon-export-ok` in each exported repository. (Otherwise, +git-daemon would complain loudly, and refuse to cooperate.) + +Last of all, the repository which should be exported is specified. It is +a good practice to put the paths after a "--" separator. + +Now, test your daemon with + + $ git ls-remote git://127.0.0.1/rule-the-world.git + +If this does not work, find out why, and submit a patch to this document. diff --git a/Documentation/howto/using-merge-subtree.txt b/Documentation/howto/using-merge-subtree.txt new file mode 100644 index 0000000..1ae8d12 --- /dev/null +++ b/Documentation/howto/using-merge-subtree.txt @@ -0,0 +1,75 @@ +Date: Sat, 5 Jan 2008 20:17:40 -0500 +From: Sean <seanlkml@sympatico.ca> +To: Miklos Vajna <vmiklos@frugalware.org> +Cc: git@vger.kernel.org +Subject: how to use git merge -s subtree? +Abstract: In this article, Sean demonstrates how one can use the subtree merge + strategy. +Content-type: text/asciidoc +Message-ID: <BAYC1-PASMTP12374B54BA370A1E1C6E78AE4E0@CEZ.ICE> + +How to use the subtree merge strategy +===================================== + +There are situations where you want to include contents in your project +from an independently developed project. You can just pull from the +other project as long as there are no conflicting paths. + +The problematic case is when there are conflicting files. Potential +candidates are Makefiles and other standard filenames. You could merge +these files but probably you do not want to. A better solution for this +problem can be to merge the project as its own subdirectory. This is not +supported by the 'recursive' merge strategy, so just pulling won't work. + +What you want is the 'subtree' merge strategy, which helps you in such a +situation. + +In this example, let's say you have the repository at `/path/to/B` (but +it can be a URL as well, if you want). You want to merge the 'master' +branch of that repository to the `dir-B` subdirectory in your current +branch. + +Here is the command sequence you need: + +---------------- +$ git remote add -f Bproject /path/to/B <1> +$ git merge -s ours --no-commit Bproject/master <2> +$ git read-tree --prefix=dir-B/ -u Bproject/master <3> +$ git commit -m "Merge B project as our subdirectory" <4> + +$ git pull -s subtree Bproject master <5> +---------------- +<1> name the other project "Bproject", and fetch. +<2> prepare for the later step to record the result as a merge. +<3> read "master" branch of Bproject to the subdirectory "dir-B". +<4> record the merge result. +<5> maintain the result with subsequent merges using "subtree" + +The first four commands are used for the initial merge, while the last +one is to merge updates from 'B project'. + +Comparing 'subtree' merge with submodules +----------------------------------------- + +- The benefit of using subtree merge is that it requires less + administrative burden from the users of your repository. It works with + older (before Git v1.5.2) clients and you have the code right after + clone. + +- However if you use submodules then you can choose not to transfer the + submodule objects. This may be a problem with the subtree merge. + +- Also, in case you make changes to the other project, it is easier to + submit changes if you just use submodules. + +Additional tips +--------------- + +- If you made changes to the other project in your repository, they may + want to merge from your project. This is possible using subtree -- it + can shift up the paths in your tree and then they can merge only the + relevant parts of your tree. + +- Please note that if the other project merges from you, then it will + connect its history to yours, which can be something they don't want + to. diff --git a/Documentation/howto/using-signed-tag-in-pull-request.txt b/Documentation/howto/using-signed-tag-in-pull-request.txt new file mode 100644 index 0000000..bbf040e --- /dev/null +++ b/Documentation/howto/using-signed-tag-in-pull-request.txt @@ -0,0 +1,217 @@ +From: Junio C Hamano <gitster@pobox.com> +Date: Tue, 17 Jan 2011 13:00:00 -0800 +Subject: Using signed tag in pull requests +Abstract: Beginning v1.7.9, a contributor can push a signed tag to her + publishing repository and ask her integrator to pull it. This assures the + integrator that the pulled history is authentic and allows others to + later validate it. +Content-type: text/asciidoc + +How to use a signed tag in pull requests +======================================== + +A typical distributed workflow using Git is for a contributor to fork a +project, build on it, publish the result to her public repository, and ask +the "upstream" person (often the owner of the project where she forked +from) to pull from her public repository. Requesting such a "pull" is made +easy by the `git request-pull` command. + +Earlier, a typical pull request may have started like this: + +------------ + The following changes since commit 406da78032179...: + + Froboz 3.2 (2011-09-30 14:20:57 -0700) + + are available in the Git repository at: + + example.com:/git/froboz.git for-xyzzy +------------ + +followed by a shortlog of the changes and a diffstat. + +The request was for a branch name (e.g. `for-xyzzy`) in the public +repository of the contributor, and even though it stated where the +contributor forked her work from, the message did not say anything about +the commit to expect at the tip of the for-xyzzy branch. If the site that +hosts the public repository of the contributor cannot be fully trusted, it +was unnecessarily hard to make sure what was pulled by the integrator was +genuinely what the contributor had produced for the project. Also there +was no easy way for third-party auditors to later verify the resulting +history. + +Starting from Git release v1.7.9, a contributor can add a signed tag to +the commit at the tip of the history and ask the integrator to pull that +signed tag. When the integrator runs `git pull`, the signed tag is +automatically verified to assure that the history is not tampered with. +In addition, the resulting merge commit records the content of the signed +tag, so that other people can verify that the branch merged by the +integrator was signed by the contributor, without fetching the signed tag +used to validate the pull request separately and keeping it in the refs +namespace. + +This document describes the workflow between the contributor and the +integrator, using Git v1.7.9 or later. + + +A contributor or a lieutenant +----------------------------- + +After preparing her work to be pulled, the contributor uses `git tag -s` +to create a signed tag: + +------------ + $ git checkout work + $ ... "git pull" from sublieutenants, "git commit" your own work ... + $ git tag -s -m "Completed frotz feature" frotz-for-xyzzy work +------------ + +Note that this example uses the `-m` option to create a signed tag with +just a one-liner message, but this is for illustration purposes only. It +is advisable to compose a well-written explanation of what the topic does +to justify why it is worthwhile for the integrator to pull it, as this +message will eventually become part of the final history after the +integrator responds to the pull request (as we will see later). + +Then she pushes the tag out to her public repository: + +------------ + $ git push example.com:/git/froboz.git/ +frotz-for-xyzzy +------------ + +There is no need to push the `work` branch or anything else. + +Note that the above command line used a plus sign at the beginning of +`+frotz-for-xyzzy` to allow forcing the update of a tag, as the same +contributor may want to reuse a signed tag with the same name after the +previous pull request has already been responded to. + +The contributor then prepares a message to request a "pull": + +------------ + $ git request-pull v3.2 example.com:/git/froboz.git/ frotz-for-xyzzy >msg.txt +------------ + +The arguments are: + +. the version of the integrator's commit the contributor based her work on; +. the URL of the repository, to which the contributor has pushed what she + wants to get pulled; and +. the name of the tag the contributor wants to get pulled (earlier, she could + write only a branch name here). + +The resulting msg.txt file begins like so: + +------------ + The following changes since commit 406da78032179...: + + Froboz 3.2 (2011-09-30 14:20:57 -0700) + + are available in the Git repository at: + + example.com:/git/froboz.git tags/frotz-for-xyzzy + + for you to fetch changes up to 703f05ad5835c...: + + Add tests and documentation for frotz (2011-12-02 10:02:52 -0800) + + ----------------------------------------------- + Completed frotz feature + ----------------------------------------------- +------------ + +followed by a shortlog of the changes and a diffstat. Comparing this with +the earlier illustration of the output from the traditional `git request-pull` +command, the reader should notice that: + +. The tip commit to expect is shown to the integrator; and +. The signed tag message is shown prominently between the dashed lines + before the shortlog. + +The latter is why the contributor would want to justify why pulling her +work is worthwhile when creating the signed tag. The contributor then +opens her favorite MUA, reads msg.txt, edits and sends it to her upstream +integrator. + + +Integrator +---------- + +After receiving such a pull request message, the integrator fetches and +integrates the tag named in the request, with: + +------------ + $ git pull example.com:/git/froboz.git/ tags/frotz-for-xyzzy +------------ + +This operation will always open an editor to allow the integrator to fine +tune the commit log message when merging a signed tag. Also, pulling a +signed tag will always create a merge commit even when the integrator does +not have any new commit since the contributor's work forked (i.e. 'fast +forward'), so that the integrator can properly explain what the merge is +about and why it was made. + +In the editor, the integrator will see something like this: + +------------ + Merge tag 'frotz-for-xyzzy' of example.com:/git/froboz.git/ + + Completed frotz feature + # gpg: Signature made Fri 02 Dec 2011 10:03:01 AM PST using RSA key ID 96AFE6CB + # gpg: Good signature from "Con Tributor <nitfol@example.com>" +------------ + +Notice that the message recorded in the signed tag "Completed frotz +feature" appears here, and again that is why it is important for the +contributor to explain her work well when creating the signed tag. + +As usual, the lines commented with `#` are stripped out. The resulting +commit records the signed tag used for this validation in a hidden field +so that it can later be used by others to audit the history. There is no +need for the integrator to keep a separate copy of the tag in his +repository (i.e. `git tag -l` won't list the `frotz-for-xyzzy` tag in the +above example), and there is no need to publish the tag to his public +repository, either. + +After the integrator responds to the pull request and her work becomes +part of the permanent history, the contributor can remove the tag from +her public repository, if she chooses, in order to keep the tag namespace +of her public repository clean, with: + +------------ + $ git push example.com:/git/froboz.git :frotz-for-xyzzy +------------ + + +Auditors +-------- + +The `--show-signature` option can be given to `git log` or `git show` and +shows the verification status of the embedded signed tag in merge commits +created when the integrator responded to a pull request of a signed tag. + +A typical output from `git show --show-signature` may look like this: + +------------ + $ git show --show-signature + commit 02306ef6a3498a39118aef9df7975bdb50091585 + merged tag 'frotz-for-xyzzy' + gpg: Signature made Fri 06 Jan 2012 12:41:49 PM PST using RSA key ID 96AFE6CB + gpg: Good signature from "Con Tributor <nitfol@example.com>" + Merge: 406da78 703f05a + Author: Inte Grator <xyzzy@example.com> + Date: Tue Jan 17 13:49:41 2012 -0800 + + Merge tag 'frotz-for-xyzzy' of example.com:/git/froboz.git/ + + Completed frotz feature + + * tag 'frotz-for-xyzzy' (100 commits) + Add tests and documentation for frotz + ... +------------ + +There is no need for the auditor to explicitly fetch the contributor's +signature, or to even be aware of what tag(s) the contributor and integrator +used to communicate the signature. All the required information is recorded +as part of the merge commit. diff --git a/Documentation/i18n.txt b/Documentation/i18n.txt new file mode 100644 index 0000000..2dd79db --- /dev/null +++ b/Documentation/i18n.txt @@ -0,0 +1,70 @@ +Git is to some extent character encoding agnostic. + + - The contents of the blob objects are uninterpreted sequences + of bytes. There is no encoding translation at the core + level. + + - Path names are encoded in UTF-8 normalization form C. This + applies to tree objects, the index file, ref names, as well as + path names in command line arguments, environment variables + and config files (`.git/config` (see linkgit:git-config[1]), + linkgit:gitignore[5], linkgit:gitattributes[5] and + linkgit:gitmodules[5]). ++ +Note that Git at the core level treats path names simply as +sequences of non-NUL bytes, there are no path name encoding +conversions (except on Mac and Windows). Therefore, using +non-ASCII path names will mostly work even on platforms and file +systems that use legacy extended ASCII encodings. However, +repositories created on such systems will not work properly on +UTF-8-based systems (e.g. Linux, Mac, Windows) and vice versa. +Additionally, many Git-based tools simply assume path names to +be UTF-8 and will fail to display other encodings correctly. + + - Commit log messages are typically encoded in UTF-8, but other + extended ASCII encodings are also supported. This includes + ISO-8859-x, CP125x and many others, but _not_ UTF-16/32, + EBCDIC and CJK multi-byte encodings (GBK, Shift-JIS, Big5, + EUC-x, CP9xx etc.). + +Although we encourage that the commit log messages are encoded +in UTF-8, both the core and Git Porcelain are designed not to +force UTF-8 on projects. If all participants of a particular +project find it more convenient to use legacy encodings, Git +does not forbid it. However, there are a few things to keep in +mind. + +. 'git commit' and 'git commit-tree' issues + a warning if the commit log message given to it does not look + like a valid UTF-8 string, unless you explicitly say your + project uses a legacy encoding. The way to say this is to + have i18n.commitencoding in `.git/config` file, like this: ++ +------------ +[i18n] + commitencoding = ISO-8859-1 +------------ ++ +Commit objects created with the above setting record the value +of `i18n.commitencoding` in its `encoding` header. This is to +help other people who look at them later. Lack of this header +implies that the commit log message is encoded in UTF-8. + +. 'git log', 'git show', 'git blame' and friends look at the + `encoding` header of a commit object, and try to re-code the + log message into UTF-8 unless otherwise specified. You can + specify the desired output encoding with + `i18n.logoutputencoding` in `.git/config` file, like this: ++ +------------ +[i18n] + logoutputencoding = ISO-8859-1 +------------ ++ +If you do not have this configuration variable, the value of +`i18n.commitencoding` is used instead. + +Note that we deliberately chose not to re-code the commit log +message when a commit is made to force UTF-8 at the commit +object level, because re-coding to UTF-8 is not necessarily a +reversible operation. diff --git a/Documentation/install-doc-quick.sh b/Documentation/install-doc-quick.sh new file mode 100755 index 0000000..327f69b --- /dev/null +++ b/Documentation/install-doc-quick.sh @@ -0,0 +1,39 @@ +#!/bin/sh +# This requires git-manpages and/or git-htmldocs repositories + +repository=${1?repository} +destdir=${2?destination} + +head=master GIT_DIR= +for d in "$repository/.git" "$repository" +do + if GIT_DIR="$d" git rev-parse refs/heads/master >/dev/null 2>&1 + then + GIT_DIR="$d" + export GIT_DIR + break + fi +done + +if test -z "$GIT_DIR" +then + echo >&2 "Neither $repository nor $repository/.git is a repository" + exit 1 +fi + +GIT_WORK_TREE=$(pwd) +GIT_INDEX_FILE=$(pwd)/.quick-doc.$$ +export GIT_INDEX_FILE GIT_WORK_TREE +rm -f "$GIT_INDEX_FILE" +trap 'rm -f "$GIT_INDEX_FILE"' 0 + +git read-tree $head +git checkout-index -a -f --prefix="$destdir"/ + +if test -n "$GZ" +then + git ls-tree -r --name-only $head | + xargs printf "$destdir/%s\n" | + xargs gzip -f +fi +rm -f "$GIT_INDEX_FILE" diff --git a/Documentation/install-webdoc.sh b/Documentation/install-webdoc.sh new file mode 100755 index 0000000..ed8b4ff --- /dev/null +++ b/Documentation/install-webdoc.sh @@ -0,0 +1,39 @@ +#!/bin/sh + +T="$1" + +for h in \ + *.txt *.html \ + howto/*.txt howto/*.html \ + technical/*.txt technical/*.html \ + RelNotes/*.txt *.css +do + if test ! -f "$h" + then + : did not match + elif test -f "$T/$h" && + $DIFF -u -I'^Last updated ' "$T/$h" "$h" + then + :; # up to date + else + echo >&2 "# install $h $T/$h" + rm -f "$T/$h" + mkdir -p $(dirname "$T/$h") + cp "$h" "$T/$h" + fi +done +strip_leading=$(echo "$T/" | sed -e 's|.|.|g') +for th in \ + "$T"/*.html "$T"/*.txt \ + "$T"/howto/*.txt "$T"/howto/*.html \ + "$T"/technical/*.txt "$T"/technical/*.html +do + h=$(expr "$th" : "$strip_leading"'\(.*\)') + case "$h" in + RelNotes-*.txt | index.html) continue ;; + esac + test -f "$h" && continue + echo >&2 "# rm -f $th" + rm -f "$th" +done +ln -sf git.html "$T/index.html" diff --git a/Documentation/line-range-format.txt b/Documentation/line-range-format.txt new file mode 100644 index 0000000..829676f --- /dev/null +++ b/Documentation/line-range-format.txt @@ -0,0 +1,30 @@ +<start> and <end> can take one of these forms: + +- number ++ +If <start> or <end> is a number, it specifies an +absolute line number (lines count from 1). ++ + +- /regex/ ++ +This form will use the first line matching the given +POSIX regex. If <start> is a regex, it will search from the end of +the previous `-L` range, if any, otherwise from the start of file. +If <start> is ``^/regex/'', it will search from the start of file. +If <end> is a regex, it will search +starting at the line given by <start>. ++ + +- +offset or -offset ++ +This is only valid for <end> and will specify a number +of lines before or after the line given by <start>. + ++ +If ``:<funcname>'' is given in place of <start> and <end>, it is a +regular expression that denotes the range from the first funcname line +that matches <funcname>, up to the next funcname line. ``:<funcname>'' +searches from the end of the previous `-L` range, if any, otherwise +from the start of file. ``^:<funcname>'' searches from the start of +file. diff --git a/Documentation/mailmap.txt b/Documentation/mailmap.txt new file mode 100644 index 0000000..4a8c276 --- /dev/null +++ b/Documentation/mailmap.txt @@ -0,0 +1,75 @@ +If the file `.mailmap` exists at the toplevel of the repository, or at +the location pointed to by the mailmap.file or mailmap.blob +configuration options, it +is used to map author and committer names and email addresses to +canonical real names and email addresses. + +In the simple form, each line in the file consists of the canonical +real name of an author, whitespace, and an email address used in the +commit (enclosed by '<' and '>') to map to the name. For example: +-- + Proper Name <commit@email.xx> +-- + +The more complex forms are: +-- + <proper@email.xx> <commit@email.xx> +-- +which allows mailmap to replace only the email part of a commit, and: +-- + Proper Name <proper@email.xx> <commit@email.xx> +-- +which allows mailmap to replace both the name and the email of a +commit matching the specified commit email address, and: +-- + Proper Name <proper@email.xx> Commit Name <commit@email.xx> +-- +which allows mailmap to replace both the name and the email of a +commit matching both the specified commit name and email address. + +Example 1: Your history contains commits by two authors, Jane +and Joe, whose names appear in the repository under several forms: + +------------ +Joe Developer <joe@example.com> +Joe R. Developer <joe@example.com> +Jane Doe <jane@example.com> +Jane Doe <jane@laptop.(none)> +Jane D. <jane@desktop.(none)> +------------ + +Now suppose that Joe wants his middle name initial used, and Jane +prefers her family name fully spelled out. A proper `.mailmap` file +would look like: + +------------ +Jane Doe <jane@desktop.(none)> +Joe R. Developer <joe@example.com> +------------ + +Note how there is no need for an entry for `<jane@laptop.(none)>`, because the +real name of that author is already correct. + +Example 2: Your repository contains commits from the following +authors: + +------------ +nick1 <bugs@company.xx> +nick2 <bugs@company.xx> +nick2 <nick2@company.xx> +santa <me@company.xx> +claus <me@company.xx> +CTO <cto@coompany.xx> +------------ + +Then you might want a `.mailmap` file that looks like: +------------ +<cto@company.xx> <cto@coompany.xx> +Some Dude <some@dude.xx> nick1 <bugs@company.xx> +Other Author <other@author.xx> nick2 <bugs@company.xx> +Other Author <other@author.xx> <nick2@company.xx> +Santa Claus <santa.claus@northpole.xx> <me@company.xx> +------------ + +Use hash '#' for comments that are either on their own line, or after +the email address. diff --git a/Documentation/manpage-1.72.xsl b/Documentation/manpage-1.72.xsl new file mode 100644 index 0000000..b4d315c --- /dev/null +++ b/Documentation/manpage-1.72.xsl @@ -0,0 +1,14 @@ +<!-- manpage-1.72.xsl: + special settings for manpages rendered from asciidoc+docbook + handles peculiarities in docbook-xsl 1.72.0 --> +<xsl:stylesheet xmlns:xsl="http://www.w3.org/1999/XSL/Transform" + version="1.0"> + +<xsl:import href="manpage-base.xsl"/> + +<!-- these are the special values for the roff control characters + needed for docbook-xsl 1.72.0 --> +<xsl:param name="git.docbook.backslash">▓</xsl:param> +<xsl:param name="git.docbook.dot" >⌂</xsl:param> + +</xsl:stylesheet> diff --git a/Documentation/manpage-base-url.xsl.in b/Documentation/manpage-base-url.xsl.in new file mode 100644 index 0000000..e800904 --- /dev/null +++ b/Documentation/manpage-base-url.xsl.in @@ -0,0 +1,10 @@ +<!-- manpage-base-url.xsl: + special settings for manpages rendered from newer docbook --> +<xsl:stylesheet xmlns:xsl="http://www.w3.org/1999/XSL/Transform" + version="1.0"> + +<!-- set a base URL for relative links --> +<xsl:param name="man.base.url.for.relative.links" + >@@MAN_BASE_URL@@</xsl:param> + +</xsl:stylesheet> diff --git a/Documentation/manpage-base.xsl b/Documentation/manpage-base.xsl new file mode 100644 index 0000000..a264fa6 --- /dev/null +++ b/Documentation/manpage-base.xsl @@ -0,0 +1,35 @@ +<!-- manpage-base.xsl: + special formatting for manpages rendered from asciidoc+docbook --> +<xsl:stylesheet xmlns:xsl="http://www.w3.org/1999/XSL/Transform" + version="1.0"> + +<!-- these params silence some output from xmlto --> +<xsl:param name="man.output.quietly" select="1"/> +<xsl:param name="refentry.meta.get.quietly" select="1"/> + +<!-- convert asciidoc callouts to man page format; + git.docbook.backslash and git.docbook.dot params + must be supplied by another XSL file or other means --> +<xsl:template match="co"> + <xsl:value-of select="concat( + $git.docbook.backslash,'fB(', + substring-after(@id,'-'),')', + $git.docbook.backslash,'fR')"/> +</xsl:template> +<xsl:template match="calloutlist"> + <xsl:value-of select="$git.docbook.dot"/> + <xsl:text>sp </xsl:text> + <xsl:apply-templates/> + <xsl:text> </xsl:text> +</xsl:template> +<xsl:template match="callout"> + <xsl:value-of select="concat( + $git.docbook.backslash,'fB', + substring-after(@arearefs,'-'), + '. ',$git.docbook.backslash,'fR')"/> + <xsl:apply-templates/> + <xsl:value-of select="$git.docbook.dot"/> + <xsl:text>br </xsl:text> +</xsl:template> + +</xsl:stylesheet> diff --git a/Documentation/manpage-bold-literal.xsl b/Documentation/manpage-bold-literal.xsl new file mode 100644 index 0000000..608eb5d --- /dev/null +++ b/Documentation/manpage-bold-literal.xsl @@ -0,0 +1,17 @@ +<!-- manpage-bold-literal.xsl: + special formatting for manpages rendered from asciidoc+docbook --> +<xsl:stylesheet xmlns:xsl="http://www.w3.org/1999/XSL/Transform" + version="1.0"> + +<!-- render literal text as bold (instead of plain or monospace); + this makes literal text easier to distinguish in manpages + viewed on a tty --> +<xsl:template match="literal"> + <xsl:value-of select="$git.docbook.backslash"/> + <xsl:text>fB</xsl:text> + <xsl:apply-templates/> + <xsl:value-of select="$git.docbook.backslash"/> + <xsl:text>fR</xsl:text> +</xsl:template> + +</xsl:stylesheet> diff --git a/Documentation/manpage-normal.xsl b/Documentation/manpage-normal.xsl new file mode 100644 index 0000000..a48f5b1 --- /dev/null +++ b/Documentation/manpage-normal.xsl @@ -0,0 +1,13 @@ +<!-- manpage-normal.xsl: + special settings for manpages rendered from asciidoc+docbook + handles anything we want to keep away from docbook-xsl 1.72.0 --> +<xsl:stylesheet xmlns:xsl="http://www.w3.org/1999/XSL/Transform" + version="1.0"> + +<xsl:import href="manpage-base.xsl"/> + +<!-- these are the normal values for the roff control characters --> +<xsl:param name="git.docbook.backslash">\</xsl:param> +<xsl:param name="git.docbook.dot" >.</xsl:param> + +</xsl:stylesheet> diff --git a/Documentation/manpage-quote-apos.xsl b/Documentation/manpage-quote-apos.xsl new file mode 100644 index 0000000..aeb8839 --- /dev/null +++ b/Documentation/manpage-quote-apos.xsl @@ -0,0 +1,16 @@ +<xsl:stylesheet xmlns:xsl="http://www.w3.org/1999/XSL/Transform" + version="1.0"> + +<!-- work around newer groff/man setups using a prettier apostrophe + that unfortunately does not quote anything when cut&pasting + examples to the shell --> +<xsl:template name="escape.apostrophe"> + <xsl:param name="content"/> + <xsl:call-template name="string.subst"> + <xsl:with-param name="string" select="$content"/> + <xsl:with-param name="target">'</xsl:with-param> + <xsl:with-param name="replacement">\(aq</xsl:with-param> + </xsl:call-template> +</xsl:template> + +</xsl:stylesheet> diff --git a/Documentation/manpage-suppress-sp.xsl b/Documentation/manpage-suppress-sp.xsl new file mode 100644 index 0000000..a63c763 --- /dev/null +++ b/Documentation/manpage-suppress-sp.xsl @@ -0,0 +1,21 @@ +<!-- manpage-suppress-sp.xsl: + special settings for manpages rendered from asciidoc+docbook + handles erroneous, inline .sp in manpage output of some + versions of docbook-xsl --> +<xsl:stylesheet xmlns:xsl="http://www.w3.org/1999/XSL/Transform" + version="1.0"> + +<!-- attempt to work around spurious .sp at the tail of the line + that some versions of docbook stylesheets seem to add --> +<xsl:template match="simpara"> + <xsl:variable name="content"> + <xsl:apply-templates/> + </xsl:variable> + <xsl:value-of select="normalize-space($content)"/> + <xsl:if test="not(ancestor::authorblurb) and + not(ancestor::personblurb)"> + <xsl:text> </xsl:text> + </xsl:if> +</xsl:template> + +</xsl:stylesheet> diff --git a/Documentation/merge-config.txt b/Documentation/merge-config.txt new file mode 100644 index 0000000..002ca58 --- /dev/null +++ b/Documentation/merge-config.txt @@ -0,0 +1,77 @@ +merge.conflictStyle:: + Specify the style in which conflicted hunks are written out to + working tree files upon merge. The default is "merge", which + shows a `<<<<<<<` conflict marker, changes made by one side, + a `=======` marker, changes made by the other side, and then + a `>>>>>>>` marker. An alternate style, "diff3", adds a `|||||||` + marker and the original text before the `=======` marker. + +merge.defaultToUpstream:: + If merge is called without any commit argument, merge the upstream + branches configured for the current branch by using their last + observed values stored in their remote-tracking branches. + The values of the `branch.<current branch>.merge` that name the + branches at the remote named by `branch.<current branch>.remote` + are consulted, and then they are mapped via `remote.<remote>.fetch` + to their corresponding remote-tracking branches, and the tips of + these tracking branches are merged. + +merge.ff:: + By default, Git does not create an extra merge commit when merging + a commit that is a descendant of the current commit. Instead, the + tip of the current branch is fast-forwarded. When set to `false`, + this variable tells Git to create an extra merge commit in such + a case (equivalent to giving the `--no-ff` option from the command + line). When set to `only`, only such fast-forward merges are + allowed (equivalent to giving the `--ff-only` option from the + command line). + +include::fmt-merge-msg-config.txt[] + +merge.renameLimit:: + The number of files to consider when performing rename detection + during a merge; if not specified, defaults to the value of + diff.renameLimit. + +merge.renormalize:: + Tell Git that canonical representation of files in the + repository has changed over time (e.g. earlier commits record + text files with CRLF line endings, but recent ones use LF line + endings). In such a repository, Git can convert the data + recorded in commits to a canonical form before performing a + merge to reduce unnecessary conflicts. For more information, + see section "Merging branches with differing checkin/checkout + attributes" in linkgit:gitattributes[5]. + +merge.stat:: + Whether to print the diffstat between ORIG_HEAD and the merge result + at the end of the merge. True by default. + +merge.tool:: + Controls which merge tool is used by linkgit:git-mergetool[1]. + The list below shows the valid built-in values. + Any other value is treated as a custom merge tool and requires + that a corresponding mergetool.<tool>.cmd variable is defined. + +include::mergetools-merge.txt[] + +merge.verbosity:: + Controls the amount of output shown by the recursive merge + strategy. Level 0 outputs nothing except a final error + message if conflicts were detected. Level 1 outputs only + conflicts, 2 outputs conflicts and file changes. Level 5 and + above outputs debugging information. The default is level 2. + Can be overridden by the 'GIT_MERGE_VERBOSITY' environment variable. + +merge.<driver>.name:: + Defines a human-readable name for a custom low-level + merge driver. See linkgit:gitattributes[5] for details. + +merge.<driver>.driver:: + Defines the command that implements a custom low-level + merge driver. See linkgit:gitattributes[5] for details. + +merge.<driver>.recursive:: + Names a low-level merge driver to be used when + performing an internal merge between common ancestors. + See linkgit:gitattributes[5] for details. diff --git a/Documentation/merge-options.txt b/Documentation/merge-options.txt new file mode 100644 index 0000000..30808a0 --- /dev/null +++ b/Documentation/merge-options.txt @@ -0,0 +1,119 @@ +--commit:: +--no-commit:: + Perform the merge and commit the result. This option can + be used to override --no-commit. ++ +With --no-commit perform the merge but pretend the merge +failed and do not autocommit, to give the user a chance to +inspect and further tweak the merge result before committing. + +--edit:: +-e:: +--no-edit:: + Invoke an editor before committing successful mechanical merge to + further edit the auto-generated merge message, so that the user + can explain and justify the merge. The `--no-edit` option can be + used to accept the auto-generated message (this is generally + discouraged). +ifndef::git-pull[] +The `--edit` (or `-e`) option is still useful if you are +giving a draft message with the `-m` option from the command line +and want to edit it in the editor. +endif::git-pull[] ++ +Older scripts may depend on the historical behaviour of not allowing the +user to edit the merge log message. They will see an editor opened when +they run `git merge`. To make it easier to adjust such scripts to the +updated behaviour, the environment variable `GIT_MERGE_AUTOEDIT` can be +set to `no` at the beginning of them. + +--ff:: + When the merge resolves as a fast-forward, only update the branch + pointer, without creating a merge commit. This is the default + behavior. + +--no-ff:: + Create a merge commit even when the merge resolves as a + fast-forward. This is the default behaviour when merging an + annotated (and possibly signed) tag. + +--ff-only:: + Refuse to merge and exit with a non-zero status unless the + current `HEAD` is already up-to-date or the merge can be + resolved as a fast-forward. + +--log[=<n>]:: +--no-log:: + In addition to branch names, populate the log message with + one-line descriptions from at most <n> actual commits that are being + merged. See also linkgit:git-fmt-merge-msg[1]. ++ +With --no-log do not list one-line descriptions from the +actual commits being merged. + + +--stat:: +-n:: +--no-stat:: + Show a diffstat at the end of the merge. The diffstat is also + controlled by the configuration option merge.stat. ++ +With -n or --no-stat do not show a diffstat at the end of the +merge. + +--squash:: +--no-squash:: + Produce the working tree and index state as if a real merge + happened (except for the merge information), but do not actually + make a commit, move the `HEAD`, or record `$GIT_DIR/MERGE_HEAD` + (to cause the next `git commit` command to create a merge + commit). This allows you to create a single commit on top of + the current branch whose effect is the same as merging another + branch (or more in case of an octopus). ++ +With --no-squash perform the merge and commit the result. This +option can be used to override --squash. + +-s <strategy>:: +--strategy=<strategy>:: + Use the given merge strategy; can be supplied more than + once to specify them in the order they should be tried. + If there is no `-s` option, a built-in list of strategies + is used instead ('git merge-recursive' when merging a single + head, 'git merge-octopus' otherwise). + +-X <option>:: +--strategy-option=<option>:: + Pass merge strategy specific option through to the merge + strategy. + +--verify-signatures:: +--no-verify-signatures:: + Verify that the tip commit of the side branch being merged is + signed with a valid key, i.e. a key that has a valid uid: in the + default trust model, this means the signing key has been signed by + a trusted key. If the tip commit of the side branch is not signed + with a valid key, the merge is aborted. + +--summary:: +--no-summary:: + Synonyms to --stat and --no-stat; these are deprecated and will be + removed in the future. + +ifndef::git-pull[] +-q:: +--quiet:: + Operate quietly. Implies --no-progress. + +-v:: +--verbose:: + Be verbose. + +--progress:: +--no-progress:: + Turn progress on/off explicitly. If neither is specified, + progress is shown if standard error is connected to a terminal. + Note that not all merge strategies may support progress + reporting. + +endif::git-pull[] diff --git a/Documentation/merge-strategies.txt b/Documentation/merge-strategies.txt new file mode 100644 index 0000000..2eb92b9 --- /dev/null +++ b/Documentation/merge-strategies.txt @@ -0,0 +1,131 @@ +MERGE STRATEGIES +---------------- + +The merge mechanism (`git merge` and `git pull` commands) allows the +backend 'merge strategies' to be chosen with `-s` option. Some strategies +can also take their own options, which can be passed by giving `-X<option>` +arguments to `git merge` and/or `git pull`. + +resolve:: + This can only resolve two heads (i.e. the current branch + and another branch you pulled from) using a 3-way merge + algorithm. It tries to carefully detect criss-cross + merge ambiguities and is considered generally safe and + fast. + +recursive:: + This can only resolve two heads using a 3-way merge + algorithm. When there is more than one common + ancestor that can be used for 3-way merge, it creates a + merged tree of the common ancestors and uses that as + the reference tree for the 3-way merge. This has been + reported to result in fewer merge conflicts without + causing mismerges by tests done on actual merge commits + taken from Linux 2.6 kernel development history. + Additionally this can detect and handle merges involving + renames. This is the default merge strategy when + pulling or merging one branch. ++ +The 'recursive' strategy can take the following options: + +ours;; + This option forces conflicting hunks to be auto-resolved cleanly by + favoring 'our' version. Changes from the other tree that do not + conflict with our side are reflected to the merge result. + For a binary file, the entire contents are taken from our side. ++ +This should not be confused with the 'ours' merge strategy, which does not +even look at what the other tree contains at all. It discards everything +the other tree did, declaring 'our' history contains all that happened in it. + +theirs;; + This is the opposite of 'ours'. + +patience;; + With this option, 'merge-recursive' spends a little extra time + to avoid mismerges that sometimes occur due to unimportant + matching lines (e.g., braces from distinct functions). Use + this when the branches to be merged have diverged wildly. + See also linkgit:git-diff[1] `--patience`. + +diff-algorithm=[patience|minimal|histogram|myers];; + Tells 'merge-recursive' to use a different diff algorithm, which + can help avoid mismerges that occur due to unimportant matching + lines (such as braces from distinct functions). See also + linkgit:git-diff[1] `--diff-algorithm`. + +ignore-space-change;; +ignore-all-space;; +ignore-space-at-eol;; + Treats lines with the indicated type of whitespace change as + unchanged for the sake of a three-way merge. Whitespace + changes mixed with other changes to a line are not ignored. + See also linkgit:git-diff[1] `-b`, `-w`, and + `--ignore-space-at-eol`. ++ +* If 'their' version only introduces whitespace changes to a line, + 'our' version is used; +* If 'our' version introduces whitespace changes but 'their' + version includes a substantial change, 'their' version is used; +* Otherwise, the merge proceeds in the usual way. + +renormalize;; + This runs a virtual check-out and check-in of all three stages + of a file when resolving a three-way merge. This option is + meant to be used when merging branches with different clean + filters or end-of-line normalization rules. See "Merging + branches with differing checkin/checkout attributes" in + linkgit:gitattributes[5] for details. + +no-renormalize;; + Disables the `renormalize` option. This overrides the + `merge.renormalize` configuration variable. + +no-renames;; + Turn off rename detection. + See also linkgit:git-diff[1] `--no-renames`. + +find-renames[=<n>];; + Turn on rename detection, optionally setting the similarity + threshold. This is the default. + See also linkgit:git-diff[1] `--find-renames`. + +rename-threshold=<n>;; + Deprecated synonym for `find-renames=<n>`. + +subtree[=<path>];; + This option is a more advanced form of 'subtree' strategy, where + the strategy makes a guess on how two trees must be shifted to + match with each other when merging. Instead, the specified path + is prefixed (or stripped from the beginning) to make the shape of + two trees to match. + +octopus:: + This resolves cases with more than two heads, but refuses to do + a complex merge that needs manual resolution. It is + primarily meant to be used for bundling topic branch + heads together. This is the default merge strategy when + pulling or merging more than one branch. + +ours:: + This resolves any number of heads, but the resulting tree of the + merge is always that of the current branch head, effectively + ignoring all changes from all other branches. It is meant to + be used to supersede old development history of side + branches. Note that this is different from the -Xours option to + the 'recursive' merge strategy. + +subtree:: + This is a modified recursive strategy. When merging trees A and + B, if B corresponds to a subtree of A, B is first adjusted to + match the tree structure of A, instead of reading the trees at + the same level. This adjustment is also done to the common + ancestor tree. + +With the strategies that use 3-way merge (including the default, 'recursive'), +if a change is made on both branches, but later reverted on one of the +branches, that change will be present in the merged result; some people find +this behavior confusing. It occurs because only the heads and the merge base +are considered when performing a merge, not the individual commits. The merge +algorithm therefore considers the reverted change as no change at all, and +substitutes the changed version instead. diff --git a/Documentation/pretty-formats.txt b/Documentation/pretty-formats.txt new file mode 100644 index 0000000..29b19b9 --- /dev/null +++ b/Documentation/pretty-formats.txt @@ -0,0 +1,238 @@ +PRETTY FORMATS +-------------- + +If the commit is a merge, and if the pretty-format +is not 'oneline', 'email' or 'raw', an additional line is +inserted before the 'Author:' line. This line begins with +"Merge: " and the sha1s of ancestral commits are printed, +separated by spaces. Note that the listed commits may not +necessarily be the list of the *direct* parent commits if you +have limited your view of history: for example, if you are +only interested in changes related to a certain directory or +file. + +There are several built-in formats, and you can define +additional formats by setting a pretty.<name> +config option to either another format name, or a +'format:' string, as described below (see +linkgit:git-config[1]). Here are the details of the +built-in formats: + +* 'oneline' + + <sha1> <title line> ++ +This is designed to be as compact as possible. + +* 'short' + + commit <sha1> + Author: <author> + + <title line> + +* 'medium' + + commit <sha1> + Author: <author> + Date: <author date> + + <title line> + + <full commit message> + +* 'full' + + commit <sha1> + Author: <author> + Commit: <committer> + + <title line> + + <full commit message> + +* 'fuller' + + commit <sha1> + Author: <author> + AuthorDate: <author date> + Commit: <committer> + CommitDate: <committer date> + + <title line> + + <full commit message> + +* 'email' + + From <sha1> <date> + From: <author> + Date: <author date> + Subject: [PATCH] <title line> + + <full commit message> + +* 'raw' ++ +The 'raw' format shows the entire commit exactly as +stored in the commit object. Notably, the SHA-1s are +displayed in full, regardless of whether --abbrev or +--no-abbrev are used, and 'parents' information show the +true parent commits, without taking grafts or history +simplification into account. Note that this format affects the way +commits are displayed, but not the way the diff is shown e.g. with +`git log --raw`. To get full object names in a raw diff format, +use `--no-abbrev`. + +* 'format:<string>' ++ +The 'format:<string>' format allows you to specify which information +you want to show. It works a little bit like printf format, +with the notable exception that you get a newline with '%n' +instead of '\n'. ++ +E.g, 'format:"The author of %h was %an, %ar%nThe title was >>%s<<%n"' +would show something like this: ++ +------- +The author of fe6e0ee was Junio C Hamano, 23 hours ago +The title was >>t4119: test autocomputing -p<n> for traditional diff input.<< + +------- ++ +The placeholders are: + +- '%H': commit hash +- '%h': abbreviated commit hash +- '%T': tree hash +- '%t': abbreviated tree hash +- '%P': parent hashes +- '%p': abbreviated parent hashes +- '%an': author name +- '%aN': author name (respecting .mailmap, see linkgit:git-shortlog[1] + or linkgit:git-blame[1]) +- '%ae': author email +- '%aE': author email (respecting .mailmap, see + linkgit:git-shortlog[1] or linkgit:git-blame[1]) +- '%ad': author date (format respects --date= option) +- '%aD': author date, RFC2822 style +- '%ar': author date, relative +- '%at': author date, UNIX timestamp +- '%ai': author date, ISO 8601-like format +- '%aI': author date, strict ISO 8601 format +- '%cn': committer name +- '%cN': committer name (respecting .mailmap, see + linkgit:git-shortlog[1] or linkgit:git-blame[1]) +- '%ce': committer email +- '%cE': committer email (respecting .mailmap, see + linkgit:git-shortlog[1] or linkgit:git-blame[1]) +- '%cd': committer date (format respects --date= option) +- '%cD': committer date, RFC2822 style +- '%cr': committer date, relative +- '%ct': committer date, UNIX timestamp +- '%ci': committer date, ISO 8601-like format +- '%cI': committer date, strict ISO 8601 format +- '%d': ref names, like the --decorate option of linkgit:git-log[1] +- '%D': ref names without the " (", ")" wrapping. +- '%e': encoding +- '%s': subject +- '%f': sanitized subject line, suitable for a filename +- '%b': body +- '%B': raw body (unwrapped subject and body) +ifndef::git-rev-list[] +- '%N': commit notes +endif::git-rev-list[] +- '%GG': raw verification message from GPG for a signed commit +- '%G?': show "G" for a good (valid) signature, "B" for a bad signature, + "U" for a good signature with unknown validity and "N" for no signature +- '%GS': show the name of the signer for a signed commit +- '%GK': show the key used to sign a signed commit +- '%gD': reflog selector, e.g., `refs/stash@{1}` +- '%gd': shortened reflog selector, e.g., `stash@{1}` +- '%gn': reflog identity name +- '%gN': reflog identity name (respecting .mailmap, see + linkgit:git-shortlog[1] or linkgit:git-blame[1]) +- '%ge': reflog identity email +- '%gE': reflog identity email (respecting .mailmap, see + linkgit:git-shortlog[1] or linkgit:git-blame[1]) +- '%gs': reflog subject +- '%Cred': switch color to red +- '%Cgreen': switch color to green +- '%Cblue': switch color to blue +- '%Creset': reset color +- '%C(...)': color specification, as described in color.branch.* config option; + adding `auto,` at the beginning will emit color only when colors are + enabled for log output (by `color.diff`, `color.ui`, or `--color`, and + respecting the `auto` settings of the former if we are going to a + terminal). `auto` alone (i.e. `%C(auto)`) will turn on auto coloring + on the next placeholders until the color is switched again. +- '%m': left, right or boundary mark +- '%n': newline +- '%%': a raw '%' +- '%x00': print a byte from a hex code +- '%w([<w>[,<i1>[,<i2>]]])': switch line wrapping, like the -w option of + linkgit:git-shortlog[1]. +- '%<(<N>[,trunc|ltrunc|mtrunc])': make the next placeholder take at + least N columns, padding spaces on the right if necessary. + Optionally truncate at the beginning (ltrunc), the middle (mtrunc) + or the end (trunc) if the output is longer than N columns. + Note that truncating only works correctly with N >= 2. +- '%<|(<N>)': make the next placeholder take at least until Nth + columns, padding spaces on the right if necessary +- '%>(<N>)', '%>|(<N>)': similar to '%<(<N>)', '%<|(<N>)' + respectively, but padding spaces on the left +- '%>>(<N>)', '%>>|(<N>)': similar to '%>(<N>)', '%>|(<N>)' + respectively, except that if the next placeholder takes more spaces + than given and there are spaces on its left, use those spaces +- '%><(<N>)', '%><|(<N>)': similar to '% <(<N>)', '%<|(<N>)' + respectively, but padding both sides (i.e. the text is centered) + +NOTE: Some placeholders may depend on other options given to the +revision traversal engine. For example, the `%g*` reflog options will +insert an empty string unless we are traversing reflog entries (e.g., by +`git log -g`). The `%d` and `%D` placeholders will use the "short" +decoration format if `--decorate` was not already provided on the command +line. + +If you add a `+` (plus sign) after '%' of a placeholder, a line-feed +is inserted immediately before the expansion if and only if the +placeholder expands to a non-empty string. + +If you add a `-` (minus sign) after '%' of a placeholder, line-feeds that +immediately precede the expansion are deleted if and only if the +placeholder expands to an empty string. + +If you add a ` ` (space) after '%' of a placeholder, a space +is inserted immediately before the expansion if and only if the +placeholder expands to a non-empty string. + +* 'tformat:' ++ +The 'tformat:' format works exactly like 'format:', except that it +provides "terminator" semantics instead of "separator" semantics. In +other words, each commit has the message terminator character (usually a +newline) appended, rather than a separator placed between entries. +This means that the final entry of a single-line format will be properly +terminated with a new line, just as the "oneline" format does. +For example: ++ +--------------------- +$ git log -2 --pretty=format:%h 4da45bef \ + | perl -pe '$_ .= " -- NO NEWLINE\n" unless /\n/' +4da45be +7134973 -- NO NEWLINE + +$ git log -2 --pretty=tformat:%h 4da45bef \ + | perl -pe '$_ .= " -- NO NEWLINE\n" unless /\n/' +4da45be +7134973 +--------------------- ++ +In addition, any unrecognized string that has a `%` in it is interpreted +as if it has `tformat:` in front of it. For example, these two are +equivalent: ++ +--------------------- +$ git log -2 --pretty=tformat:%h 4da45bef +$ git log -2 --pretty=%h 4da45bef +--------------------- diff --git a/Documentation/pretty-options.txt b/Documentation/pretty-options.txt new file mode 100644 index 0000000..54b88b6 --- /dev/null +++ b/Documentation/pretty-options.txt @@ -0,0 +1,82 @@ +--pretty[=<format>]:: +--format=<format>:: + + Pretty-print the contents of the commit logs in a given format, + where '<format>' can be one of 'oneline', 'short', 'medium', + 'full', 'fuller', 'email', 'raw', 'format:<string>' + and 'tformat:<string>'. When '<format>' is none of the above, + and has '%placeholder' in it, it acts as if + '--pretty=tformat:<format>' were given. ++ +See the "PRETTY FORMATS" section for some additional details for each +format. When '=<format>' part is omitted, it defaults to 'medium'. ++ +Note: you can specify the default pretty format in the repository +configuration (see linkgit:git-config[1]). + +--abbrev-commit:: + Instead of showing the full 40-byte hexadecimal commit object + name, show only a partial prefix. Non default number of + digits can be specified with "--abbrev=<n>" (which also modifies + diff output, if it is displayed). ++ +This should make "--pretty=oneline" a whole lot more readable for +people using 80-column terminals. + +--no-abbrev-commit:: + Show the full 40-byte hexadecimal commit object name. This negates + `--abbrev-commit` and those options which imply it such as + "--oneline". It also overrides the 'log.abbrevCommit' variable. + +--oneline:: + This is a shorthand for "--pretty=oneline --abbrev-commit" + used together. + +--encoding=<encoding>:: + The commit objects record the encoding used for the log message + in their encoding header; this option can be used to tell the + command to re-code the commit log message in the encoding + preferred by the user. For non plumbing commands this + defaults to UTF-8. Note that if an object claims to be encoded + in `X` and we are outputting in `X`, we will output the object + verbatim; this means that invalid sequences in the original + commit may be copied to the output. + +ifndef::git-rev-list[] +--notes[=<treeish>]:: + Show the notes (see linkgit:git-notes[1]) that annotate the + commit, when showing the commit log message. This is the default + for `git log`, `git show` and `git whatchanged` commands when + there is no `--pretty`, `--format`, or `--oneline` option given + on the command line. ++ +By default, the notes shown are from the notes refs listed in the +'core.notesRef' and 'notes.displayRef' variables (or corresponding +environment overrides). See linkgit:git-config[1] for more details. ++ +With an optional '<treeish>' argument, use the treeish to find the notes +to display. The treeish can specify the full refname when it begins +with `refs/notes/`; when it begins with `notes/`, `refs/` and otherwise +`refs/notes/` is prefixed to form a full name of the ref. ++ +Multiple --notes options can be combined to control which notes are +being displayed. Examples: "--notes=foo" will show only notes from +"refs/notes/foo"; "--notes=foo --notes" will show both notes from +"refs/notes/foo" and from the default notes ref(s). + +--no-notes:: + Do not show notes. This negates the above `--notes` option, by + resetting the list of notes refs from which notes are shown. + Options are parsed in the order given on the command line, so e.g. + "--notes --notes=foo --no-notes --notes=bar" will only show notes + from "refs/notes/bar". + +--show-notes[=<treeish>]:: +--[no-]standard-notes:: + These options are deprecated. Use the above --notes/--no-notes + options instead. +endif::git-rev-list[] + +--show-signature:: + Check the validity of a signed commit object by passing the signature + to `gpg --verify` and show the output. diff --git a/Documentation/pull-fetch-param.txt b/Documentation/pull-fetch-param.txt new file mode 100644 index 0000000..1ebbf1d --- /dev/null +++ b/Documentation/pull-fetch-param.txt @@ -0,0 +1,71 @@ +<repository>:: + The "remote" repository that is the source of a fetch + or pull operation. This parameter can be either a URL + (see the section <<URLS,GIT URLS>> below) or the name + of a remote (see the section <<REMOTES,REMOTES>> below). + +ifndef::git-pull[] +<group>:: + A name referring to a list of repositories as the value + of remotes.<group> in the configuration file. + (See linkgit:git-config[1]). +endif::git-pull[] + +<refspec>:: + Specifies which refs to fetch and which local refs to update. + When no <refspec>s appear on the command line, the refs to fetch + are read from `remote.<repository>.fetch` variables instead +ifndef::git-pull[] + (see <<CRTB,CONFIGURED REMOTE-TRACKING BRANCHES>> below). +endif::git-pull[] +ifdef::git-pull[] + (see linkgit:git-fetch[1]). +endif::git-pull[] ++ +The format of a <refspec> parameter is an optional plus +`+`, followed by the source ref <src>, followed +by a colon `:`, followed by the destination ref <dst>. +The colon can be omitted when <dst> is empty. ++ +`tag <tag>` means the same as `refs/tags/<tag>:refs/tags/<tag>`; +it requests fetching everything up to the given tag. ++ +The remote ref that matches <src> +is fetched, and if <dst> is not empty string, the local +ref that matches it is fast-forwarded using <src>. +If the optional plus `+` is used, the local ref +is updated even if it does not result in a fast-forward +update. ++ +[NOTE] +When the remote branch you want to fetch is known to +be rewound and rebased regularly, it is expected that +its new tip will not be descendant of its previous tip +(as stored in your remote-tracking branch the last time +you fetched). You would want +to use the `+` sign to indicate non-fast-forward updates +will be needed for such branches. There is no way to +determine or declare that a branch will be made available +in a repository with this behavior; the pulling user simply +must know this is the expected usage pattern for a branch. +ifdef::git-pull[] ++ +[NOTE] +There is a difference between listing multiple <refspec> +directly on 'git pull' command line and having multiple +`remote.<repository>.fetch` entries in your configuration +for a <repository> and running a +'git pull' command without any explicit <refspec> parameters. +<refspec>s listed explicitly on the command line are always +merged into the current branch after fetching. In other words, +if you list more than one remote ref, 'git pull' will create +an Octopus merge. On the other hand, if you do not list any +explicit <refspec> parameter on the command line, 'git pull' +will fetch all the <refspec>s it finds in the +`remote.<repository>.fetch` configuration and merge +only the first <refspec> found into the current branch. +This is because making an +Octopus from remote refs is rarely done, while keeping track +of multiple remote heads in one-go by fetching more than one +is often useful. +endif::git-pull[] diff --git a/Documentation/rev-list-options.txt b/Documentation/rev-list-options.txt new file mode 100644 index 0000000..4f009d4 --- /dev/null +++ b/Documentation/rev-list-options.txt @@ -0,0 +1,861 @@ +Commit Limiting +~~~~~~~~~~~~~~~ + +Besides specifying a range of commits that should be listed using the +special notations explained in the description, additional commit +limiting may be applied. + +Using more options generally further limits the output (e.g. +`--since=<date1>` limits to commits newer than `<date1>`, and using it +with `--grep=<pattern>` further limits to commits whose log message +has a line that matches `<pattern>`), unless otherwise noted. + +Note that these are applied before commit +ordering and formatting options, such as `--reverse`. + +-- + +-<number>:: +-n <number>:: +--max-count=<number>:: + Limit the number of commits to output. + +--skip=<number>:: + Skip 'number' commits before starting to show the commit output. + +--since=<date>:: +--after=<date>:: + Show commits more recent than a specific date. + +--until=<date>:: +--before=<date>:: + Show commits older than a specific date. + +ifdef::git-rev-list[] +--max-age=<timestamp>:: +--min-age=<timestamp>:: + Limit the commits output to specified time range. +endif::git-rev-list[] + +--author=<pattern>:: +--committer=<pattern>:: + Limit the commits output to ones with author/committer + header lines that match the specified pattern (regular + expression). With more than one `--author=<pattern>`, + commits whose author matches any of the given patterns are + chosen (similarly for multiple `--committer=<pattern>`). + +--grep-reflog=<pattern>:: + Limit the commits output to ones with reflog entries that + match the specified pattern (regular expression). With + more than one `--grep-reflog`, commits whose reflog message + matches any of the given patterns are chosen. It is an + error to use this option unless `--walk-reflogs` is in use. + +--grep=<pattern>:: + Limit the commits output to ones with log message that + matches the specified pattern (regular expression). With + more than one `--grep=<pattern>`, commits whose message + matches any of the given patterns are chosen (but see + `--all-match`). +ifndef::git-rev-list[] ++ +When `--show-notes` is in effect, the message from the notes is +matched as if it were part of the log message. +endif::git-rev-list[] + +--all-match:: + Limit the commits output to ones that match all given `--grep`, + instead of ones that match at least one. + +--invert-grep:: + Limit the commits output to ones with log message that do not + match the pattern specified with `--grep=<pattern>`. + +-i:: +--regexp-ignore-case:: + Match the regular expression limiting patterns without regard to letter + case. + +--basic-regexp:: + Consider the limiting patterns to be basic regular expressions; + this is the default. + +-E:: +--extended-regexp:: + Consider the limiting patterns to be extended regular expressions + instead of the default basic regular expressions. + +-F:: +--fixed-strings:: + Consider the limiting patterns to be fixed strings (don't interpret + pattern as a regular expression). + +--perl-regexp:: + Consider the limiting patterns to be Perl-compatible regular expressions. + Requires libpcre to be compiled in. + +--remove-empty:: + Stop when a given path disappears from the tree. + +--merges:: + Print only merge commits. This is exactly the same as `--min-parents=2`. + +--no-merges:: + Do not print commits with more than one parent. This is + exactly the same as `--max-parents=1`. + +--min-parents=<number>:: +--max-parents=<number>:: +--no-min-parents:: +--no-max-parents:: + Show only commits which have at least (or at most) that many parent + commits. In particular, `--max-parents=1` is the same as `--no-merges`, + `--min-parents=2` is the same as `--merges`. `--max-parents=0` + gives all root commits and `--min-parents=3` all octopus merges. ++ +`--no-min-parents` and `--no-max-parents` reset these limits (to no limit) +again. Equivalent forms are `--min-parents=0` (any commit has 0 or more +parents) and `--max-parents=-1` (negative numbers denote no upper limit). + +--first-parent:: + Follow only the first parent commit upon seeing a merge + commit. This option can give a better overview when + viewing the evolution of a particular topic branch, + because merges into a topic branch tend to be only about + adjusting to updated upstream from time to time, and + this option allows you to ignore the individual commits + brought in to your history by such a merge. Cannot be + combined with --bisect. + +--not:: + Reverses the meaning of the '{caret}' prefix (or lack thereof) + for all following revision specifiers, up to the next `--not`. + +--all:: + Pretend as if all the refs in `refs/` are listed on the + command line as '<commit>'. + +--branches[=<pattern>]:: + Pretend as if all the refs in `refs/heads` are listed + on the command line as '<commit>'. If '<pattern>' is given, limit + branches to ones matching given shell glob. If pattern lacks '?', + '{asterisk}', or '[', '/{asterisk}' at the end is implied. + +--tags[=<pattern>]:: + Pretend as if all the refs in `refs/tags` are listed + on the command line as '<commit>'. If '<pattern>' is given, limit + tags to ones matching given shell glob. If pattern lacks '?', '{asterisk}', + or '[', '/{asterisk}' at the end is implied. + +--remotes[=<pattern>]:: + Pretend as if all the refs in `refs/remotes` are listed + on the command line as '<commit>'. If '<pattern>' is given, limit + remote-tracking branches to ones matching given shell glob. + If pattern lacks '?', '{asterisk}', or '[', '/{asterisk}' at the end is implied. + +--glob=<glob-pattern>:: + Pretend as if all the refs matching shell glob '<glob-pattern>' + are listed on the command line as '<commit>'. Leading 'refs/', + is automatically prepended if missing. If pattern lacks '?', '{asterisk}', + or '[', '/{asterisk}' at the end is implied. + +--exclude=<glob-pattern>:: + + Do not include refs matching '<glob-pattern>' that the next `--all`, + `--branches`, `--tags`, `--remotes`, or `--glob` would otherwise + consider. Repetitions of this option accumulate exclusion patterns + up to the next `--all`, `--branches`, `--tags`, `--remotes`, or + `--glob` option (other options or arguments do not clear + accumulated patterns). ++ +The patterns given should not begin with `refs/heads`, `refs/tags`, or +`refs/remotes` when applied to `--branches`, `--tags`, or `--remotes`, +respectively, and they must begin with `refs/` when applied to `--glob` +or `--all`. If a trailing '/{asterisk}' is intended, it must be given +explicitly. + +--reflog:: + Pretend as if all objects mentioned by reflogs are listed on the + command line as `<commit>`. + +--ignore-missing:: + Upon seeing an invalid object name in the input, pretend as if + the bad input was not given. + +ifndef::git-rev-list[] +--bisect:: + Pretend as if the bad bisection ref `refs/bisect/bad` + was listed and as if it was followed by `--not` and the good + bisection refs `refs/bisect/good-*` on the command + line. Cannot be combined with --first-parent. +endif::git-rev-list[] + +--stdin:: + In addition to the '<commit>' listed on the command + line, read them from the standard input. If a '--' separator is + seen, stop reading commits and start reading paths to limit the + result. + +ifdef::git-rev-list[] +--quiet:: + Don't print anything to standard output. This form + is primarily meant to allow the caller to + test the exit status to see if a range of objects is fully + connected (or not). It is faster than redirecting stdout + to `/dev/null` as the output does not have to be formatted. +endif::git-rev-list[] + +--cherry-mark:: + Like `--cherry-pick` (see below) but mark equivalent commits + with `=` rather than omitting them, and inequivalent ones with `+`. + +--cherry-pick:: + Omit any commit that introduces the same change as + another commit on the ``other side'' when the set of + commits are limited with symmetric difference. ++ +For example, if you have two branches, `A` and `B`, a usual way +to list all commits on only one side of them is with +`--left-right` (see the example below in the description of +the `--left-right` option). However, it shows the commits that were +cherry-picked from the other branch (for example, ``3rd on b'' may be +cherry-picked from branch A). With this option, such pairs of commits are +excluded from the output. + +--left-only:: +--right-only:: + List only commits on the respective side of a symmetric range, + i.e. only those which would be marked `<` resp. `>` by + `--left-right`. ++ +For example, `--cherry-pick --right-only A...B` omits those +commits from `B` which are in `A` or are patch-equivalent to a commit in +`A`. In other words, this lists the `+` commits from `git cherry A B`. +More precisely, `--cherry-pick --right-only --no-merges` gives the exact +list. + +--cherry:: + A synonym for `--right-only --cherry-mark --no-merges`; useful to + limit the output to the commits on our side and mark those that + have been applied to the other side of a forked history with + `git log --cherry upstream...mybranch`, similar to + `git cherry upstream mybranch`. + +-g:: +--walk-reflogs:: + Instead of walking the commit ancestry chain, walk + reflog entries from the most recent one to older ones. + When this option is used you cannot specify commits to + exclude (that is, '{caret}commit', 'commit1..commit2', + and 'commit1\...commit2' notations cannot be used). ++ +With `--pretty` format other than `oneline` (for obvious reasons), +this causes the output to have two extra lines of information +taken from the reflog. By default, 'commit@\{Nth}' notation is +used in the output. When the starting commit is specified as +'commit@\{now}', output also uses 'commit@\{timestamp}' notation +instead. Under `--pretty=oneline`, the commit message is +prefixed with this information on the same line. +This option cannot be combined with `--reverse`. +See also linkgit:git-reflog[1]. + +--merge:: + After a failed merge, show refs that touch files having a + conflict and don't exist on all heads to merge. + +--boundary:: + Output excluded boundary commits. Boundary commits are + prefixed with `-`. + +ifdef::git-rev-list[] +--use-bitmap-index:: + + Try to speed up the traversal using the pack bitmap index (if + one is available). Note that when traversing with `--objects`, + trees and blobs will not have their associated path printed. +endif::git-rev-list[] + +-- + +History Simplification +~~~~~~~~~~~~~~~~~~~~~~ + +Sometimes you are only interested in parts of the history, for example the +commits modifying a particular <path>. But there are two parts of +'History Simplification', one part is selecting the commits and the other +is how to do it, as there are various strategies to simplify the history. + +The following options select the commits to be shown: + +<paths>:: + Commits modifying the given <paths> are selected. + +--simplify-by-decoration:: + Commits that are referred by some branch or tag are selected. + +Note that extra commits can be shown to give a meaningful history. + +The following options affect the way the simplification is performed: + +Default mode:: + Simplifies the history to the simplest history explaining the + final state of the tree. Simplest because it prunes some side + branches if the end result is the same (i.e. merging branches + with the same content) + +--full-history:: + Same as the default mode, but does not prune some history. + +--dense:: + Only the selected commits are shown, plus some to have a + meaningful history. + +--sparse:: + All commits in the simplified history are shown. + +--simplify-merges:: + Additional option to `--full-history` to remove some needless + merges from the resulting history, as there are no selected + commits contributing to this merge. + +--ancestry-path:: + When given a range of commits to display (e.g. 'commit1..commit2' + or 'commit2 {caret}commit1'), only display commits that exist + directly on the ancestry chain between the 'commit1' and + 'commit2', i.e. commits that are both descendants of 'commit1', + and ancestors of 'commit2'. + +A more detailed explanation follows. + +Suppose you specified `foo` as the <paths>. We shall call commits +that modify `foo` !TREESAME, and the rest TREESAME. (In a diff +filtered for `foo`, they look different and equal, respectively.) + +In the following, we will always refer to the same example history to +illustrate the differences between simplification settings. We assume +that you are filtering for a file `foo` in this commit graph: +----------------------------------------------------------------------- + .-A---M---N---O---P---Q + / / / / / / + I B C D E Y + \ / / / / / + `-------------' X +----------------------------------------------------------------------- +The horizontal line of history A---Q is taken to be the first parent of +each merge. The commits are: + +* `I` is the initial commit, in which `foo` exists with contents + ``asdf'', and a file `quux` exists with contents ``quux''. Initial + commits are compared to an empty tree, so `I` is !TREESAME. + +* In `A`, `foo` contains just ``foo''. + +* `B` contains the same change as `A`. Its merge `M` is trivial and + hence TREESAME to all parents. + +* `C` does not change `foo`, but its merge `N` changes it to ``foobar'', + so it is not TREESAME to any parent. + +* `D` sets `foo` to ``baz''. Its merge `O` combines the strings from + `N` and `D` to ``foobarbaz''; i.e., it is not TREESAME to any parent. + +* `E` changes `quux` to ``xyzzy'', and its merge `P` combines the + strings to ``quux xyzzy''. `P` is TREESAME to `O`, but not to `E`. + +* `X` is an independent root commit that added a new file `side`, and `Y` + modified it. `Y` is TREESAME to `X`. Its merge `Q` added `side` to `P`, and + `Q` is TREESAME to `P`, but not to `Y`. + +`rev-list` walks backwards through history, including or excluding +commits based on whether `--full-history` and/or parent rewriting +(via `--parents` or `--children`) are used. The following settings +are available. + +Default mode:: + Commits are included if they are not TREESAME to any parent + (though this can be changed, see `--sparse` below). If the + commit was a merge, and it was TREESAME to one parent, follow + only that parent. (Even if there are several TREESAME + parents, follow only one of them.) Otherwise, follow all + parents. ++ +This results in: ++ +----------------------------------------------------------------------- + .-A---N---O + / / / + I---------D +----------------------------------------------------------------------- ++ +Note how the rule to only follow the TREESAME parent, if one is +available, removed `B` from consideration entirely. `C` was +considered via `N`, but is TREESAME. Root commits are compared to an +empty tree, so `I` is !TREESAME. ++ +Parent/child relations are only visible with `--parents`, but that does +not affect the commits selected in default mode, so we have shown the +parent lines. + +--full-history without parent rewriting:: + This mode differs from the default in one point: always follow + all parents of a merge, even if it is TREESAME to one of them. + Even if more than one side of the merge has commits that are + included, this does not imply that the merge itself is! In + the example, we get ++ +----------------------------------------------------------------------- + I A B N D O P Q +----------------------------------------------------------------------- ++ +`M` was excluded because it is TREESAME to both parents. `E`, +`C` and `B` were all walked, but only `B` was !TREESAME, so the others +do not appear. ++ +Note that without parent rewriting, it is not really possible to talk +about the parent/child relationships between the commits, so we show +them disconnected. + +--full-history with parent rewriting:: + Ordinary commits are only included if they are !TREESAME + (though this can be changed, see `--sparse` below). ++ +Merges are always included. However, their parent list is rewritten: +Along each parent, prune away commits that are not included +themselves. This results in ++ +----------------------------------------------------------------------- + .-A---M---N---O---P---Q + / / / / / + I B / D / + \ / / / / + `-------------' +----------------------------------------------------------------------- ++ +Compare to `--full-history` without rewriting above. Note that `E` +was pruned away because it is TREESAME, but the parent list of P was +rewritten to contain `E`'s parent `I`. The same happened for `C` and +`N`, and `X`, `Y` and `Q`. + +In addition to the above settings, you can change whether TREESAME +affects inclusion: + +--dense:: + Commits that are walked are included if they are not TREESAME + to any parent. + +--sparse:: + All commits that are walked are included. ++ +Note that without `--full-history`, this still simplifies merges: if +one of the parents is TREESAME, we follow only that one, so the other +sides of the merge are never walked. + +--simplify-merges:: + First, build a history graph in the same way that + `--full-history` with parent rewriting does (see above). ++ +Then simplify each commit `C` to its replacement `C'` in the final +history according to the following rules: ++ +-- +* Set `C'` to `C`. ++ +* Replace each parent `P` of `C'` with its simplification `P'`. In + the process, drop parents that are ancestors of other parents or that are + root commits TREESAME to an empty tree, and remove duplicates, but take care + to never drop all parents that we are TREESAME to. ++ +* If after this parent rewriting, `C'` is a root or merge commit (has + zero or >1 parents), a boundary commit, or !TREESAME, it remains. + Otherwise, it is replaced with its only parent. +-- ++ +The effect of this is best shown by way of comparing to +`--full-history` with parent rewriting. The example turns into: ++ +----------------------------------------------------------------------- + .-A---M---N---O + / / / + I B D + \ / / + `---------' +----------------------------------------------------------------------- ++ +Note the major differences in `N`, `P`, and `Q` over `--full-history`: ++ +-- +* `N`'s parent list had `I` removed, because it is an ancestor of the + other parent `M`. Still, `N` remained because it is !TREESAME. ++ +* `P`'s parent list similarly had `I` removed. `P` was then + removed completely, because it had one parent and is TREESAME. ++ +* `Q`'s parent list had `Y` simplified to `X`. `X` was then removed, because it + was a TREESAME root. `Q` was then removed completely, because it had one + parent and is TREESAME. +-- + +Finally, there is a fifth simplification mode available: + +--ancestry-path:: + Limit the displayed commits to those directly on the ancestry + chain between the ``from'' and ``to'' commits in the given commit + range. I.e. only display commits that are ancestor of the ``to'' + commit and descendants of the ``from'' commit. ++ +As an example use case, consider the following commit history: ++ +----------------------------------------------------------------------- + D---E-------F + / \ \ + B---C---G---H---I---J + / \ + A-------K---------------L--M +----------------------------------------------------------------------- ++ +A regular 'D..M' computes the set of commits that are ancestors of `M`, +but excludes the ones that are ancestors of `D`. This is useful to see +what happened to the history leading to `M` since `D`, in the sense +that ``what does `M` have that did not exist in `D`''. The result in this +example would be all the commits, except `A` and `B` (and `D` itself, +of course). ++ +When we want to find out what commits in `M` are contaminated with the +bug introduced by `D` and need fixing, however, we might want to view +only the subset of 'D..M' that are actually descendants of `D`, i.e. +excluding `C` and `K`. This is exactly what the `--ancestry-path` +option does. Applied to the 'D..M' range, it results in: ++ +----------------------------------------------------------------------- + E-------F + \ \ + G---H---I---J + \ + L--M +----------------------------------------------------------------------- + +The `--simplify-by-decoration` option allows you to view only the +big picture of the topology of the history, by omitting commits +that are not referenced by tags. Commits are marked as !TREESAME +(in other words, kept after history simplification rules described +above) if (1) they are referenced by tags, or (2) they change the +contents of the paths given on the command line. All other +commits are marked as TREESAME (subject to be simplified away). + +ifdef::git-rev-list[] +Bisection Helpers +~~~~~~~~~~~~~~~~~ + +--bisect:: + Limit output to the one commit object which is roughly halfway between + included and excluded commits. Note that the bad bisection ref + `refs/bisect/bad` is added to the included commits (if it + exists) and the good bisection refs `refs/bisect/good-*` are + added to the excluded commits (if they exist). Thus, supposing there + are no refs in `refs/bisect/`, if ++ +----------------------------------------------------------------------- + $ git rev-list --bisect foo ^bar ^baz +----------------------------------------------------------------------- ++ +outputs 'midpoint', the output of the two commands ++ +----------------------------------------------------------------------- + $ git rev-list foo ^midpoint + $ git rev-list midpoint ^bar ^baz +----------------------------------------------------------------------- ++ +would be of roughly the same length. Finding the change which +introduces a regression is thus reduced to a binary search: repeatedly +generate and test new 'midpoint's until the commit chain is of length +one. Cannot be combined with --first-parent. + +--bisect-vars:: + This calculates the same as `--bisect`, except that refs in + `refs/bisect/` are not used, and except that this outputs + text ready to be eval'ed by the shell. These lines will assign the + name of the midpoint revision to the variable `bisect_rev`, and the + expected number of commits to be tested after `bisect_rev` is tested + to `bisect_nr`, the expected number of commits to be tested if + `bisect_rev` turns out to be good to `bisect_good`, the expected + number of commits to be tested if `bisect_rev` turns out to be bad to + `bisect_bad`, and the number of commits we are bisecting right now to + `bisect_all`. + +--bisect-all:: + This outputs all the commit objects between the included and excluded + commits, ordered by their distance to the included and excluded + commits. Refs in `refs/bisect/` are not used. The farthest + from them is displayed first. (This is the only one displayed by + `--bisect`.) ++ +This is useful because it makes it easy to choose a good commit to +test when you want to avoid to test some of them for some reason (they +may not compile for example). ++ +This option can be used along with `--bisect-vars`, in this case, +after all the sorted commit objects, there will be the same text as if +`--bisect-vars` had been used alone. +endif::git-rev-list[] + + +Commit Ordering +~~~~~~~~~~~~~~~ + +By default, the commits are shown in reverse chronological order. + +--date-order:: + Show no parents before all of its children are shown, but + otherwise show commits in the commit timestamp order. + +--author-date-order:: + Show no parents before all of its children are shown, but + otherwise show commits in the author timestamp order. + +--topo-order:: + Show no parents before all of its children are shown, and + avoid showing commits on multiple lines of history + intermixed. ++ +For example, in a commit history like this: ++ +---------------------------------------------------------------- + + ---1----2----4----7 + \ \ + 3----5----6----8--- + +---------------------------------------------------------------- ++ +where the numbers denote the order of commit timestamps, `git +rev-list` and friends with `--date-order` show the commits in the +timestamp order: 8 7 6 5 4 3 2 1. ++ +With `--topo-order`, they would show 8 6 5 3 7 4 2 1 (or 8 7 4 2 6 5 +3 1); some older commits are shown before newer ones in order to +avoid showing the commits from two parallel development track mixed +together. + +--reverse:: + Output the commits in reverse order. + Cannot be combined with `--walk-reflogs`. + +Object Traversal +~~~~~~~~~~~~~~~~ + +These options are mostly targeted for packing of Git repositories. + +ifdef::git-rev-list[] +--objects:: + Print the object IDs of any object referenced by the listed + commits. `--objects foo ^bar` thus means ``send me + all object IDs which I need to download if I have the commit + object _bar_ but not _foo_''. + +--objects-edge:: + Similar to `--objects`, but also print the IDs of excluded + commits prefixed with a ``-'' character. This is used by + linkgit:git-pack-objects[1] to build a ``thin'' pack, which records + objects in deltified form based on objects contained in these + excluded commits to reduce network traffic. + +--objects-edge-aggressive:: + Similar to `--objects-edge`, but it tries harder to find excluded + commits at the cost of increased time. This is used instead of + `--objects-edge` to build ``thin'' packs for shallow repositories. + +--indexed-objects:: + Pretend as if all trees and blobs used by the index are listed + on the command line. Note that you probably want to use + `--objects`, too. + +--unpacked:: + Only useful with `--objects`; print the object IDs that are not + in packs. +endif::git-rev-list[] + +--no-walk[=(sorted|unsorted)]:: + Only show the given commits, but do not traverse their ancestors. + This has no effect if a range is specified. If the argument + `unsorted` is given, the commits are shown in the order they were + given on the command line. Otherwise (if `sorted` or no argument + was given), the commits are shown in reverse chronological order + by commit time. + Cannot be combined with `--graph`. + +--do-walk:: + Overrides a previous `--no-walk`. + +Commit Formatting +~~~~~~~~~~~~~~~~~ + +ifdef::git-rev-list[] +Using these options, linkgit:git-rev-list[1] will act similar to the +more specialized family of commit log tools: linkgit:git-log[1], +linkgit:git-show[1], and linkgit:git-whatchanged[1] +endif::git-rev-list[] + +include::pretty-options.txt[] + +--relative-date:: + Synonym for `--date=relative`. + +--date=<format>:: + Only takes effect for dates shown in human-readable format, such + as when using `--pretty`. `log.date` config variable sets a default + value for the log command's `--date` option. By default, dates + are shown in the original time zone (either committer's or + author's). If `-local` is appended to the format (e.g., + `iso-local`), the user's local time zone is used instead. ++ +`--date=relative` shows dates relative to the current time, +e.g. ``2 hours ago''. The `-local` option cannot be used with +`--raw` or `--relative`. ++ +`--date=local` is an alias for `--date=default-local`. ++ +`--date=iso` (or `--date=iso8601`) shows timestamps in a ISO 8601-like format. +The differences to the strict ISO 8601 format are: + + - a space instead of the `T` date/time delimiter + - a space between time and time zone + - no colon between hours and minutes of the time zone + ++ +`--date=iso-strict` (or `--date=iso8601-strict`) shows timestamps in strict +ISO 8601 format. ++ +`--date=rfc` (or `--date=rfc2822`) shows timestamps in RFC 2822 +format, often found in email messages. ++ +`--date=short` shows only the date, but not the time, in `YYYY-MM-DD` format. ++ +`--date=raw` shows the date in the internal raw Git format `%s %z` format. ++ +`--date=format:...` feeds the format `...` to your system `strftime`. +Use `--date=format:%c` to show the date in your system locale's +preferred format. See the `strftime` manual for a complete list of +format placeholders. When using `-local`, the correct syntax is +`--date=format-local:...`. ++ +`--date=default` is the default format, and is similar to +`--date=rfc2822`, with a few exceptions: + + - there is no comma after the day-of-week + + - the time zone is omitted when the local time zone is used + +ifdef::git-rev-list[] +--header:: + Print the contents of the commit in raw-format; each record is + separated with a NUL character. +endif::git-rev-list[] + +--parents:: + Print also the parents of the commit (in the form "commit parent..."). + Also enables parent rewriting, see 'History Simplification' below. + +--children:: + Print also the children of the commit (in the form "commit child..."). + Also enables parent rewriting, see 'History Simplification' below. + +ifdef::git-rev-list[] +--timestamp:: + Print the raw commit timestamp. +endif::git-rev-list[] + +--left-right:: + Mark which side of a symmetric diff a commit is reachable from. + Commits from the left side are prefixed with `<` and those from + the right with `>`. If combined with `--boundary`, those + commits are prefixed with `-`. ++ +For example, if you have this topology: ++ +----------------------------------------------------------------------- + y---b---b branch B + / \ / + / . + / / \ + o---x---a---a branch A +----------------------------------------------------------------------- ++ +you would get an output like this: ++ +----------------------------------------------------------------------- + $ git rev-list --left-right --boundary --pretty=oneline A...B + + >bbbbbbb... 3rd on b + >bbbbbbb... 2nd on b + <aaaaaaa... 3rd on a + <aaaaaaa... 2nd on a + -yyyyyyy... 1st on b + -xxxxxxx... 1st on a +----------------------------------------------------------------------- + +--graph:: + Draw a text-based graphical representation of the commit history + on the left hand side of the output. This may cause extra lines + to be printed in between commits, in order for the graph history + to be drawn properly. + Cannot be combined with `--no-walk`. ++ +This enables parent rewriting, see 'History Simplification' below. ++ +This implies the `--topo-order` option by default, but the +`--date-order` option may also be specified. + +--show-linear-break[=<barrier>]:: + When --graph is not used, all history branches are flattened + which can make it hard to see that the two consecutive commits + do not belong to a linear branch. This option puts a barrier + in between them in that case. If `<barrier>` is specified, it + is the string that will be shown instead of the default one. + +ifdef::git-rev-list[] +--count:: + Print a number stating how many commits would have been + listed, and suppress all other output. When used together + with `--left-right`, instead print the counts for left and + right commits, separated by a tab. When used together with + `--cherry-mark`, omit patch equivalent commits from these + counts and print the count for equivalent commits separated + by a tab. +endif::git-rev-list[] + +ifndef::git-rev-list[] +Diff Formatting +~~~~~~~~~~~~~~~ + +Listed below are options that control the formatting of diff output. +Some of them are specific to linkgit:git-rev-list[1], however other diff +options may be given. See linkgit:git-diff-files[1] for more options. + +-c:: + With this option, diff output for a merge commit + shows the differences from each of the parents to the merge result + simultaneously instead of showing pairwise diff between a parent + and the result one at a time. Furthermore, it lists only files + which were modified from all parents. + +--cc:: + This flag implies the `-c` option and further compresses the + patch output by omitting uninteresting hunks whose contents in + the parents have only two variants and the merge result picks + one of them without modification. + +-m:: + This flag makes the merge commits show the full diff like + regular commits; for each merge parent, a separate log entry + and diff is generated. An exception is that only diff against + the first parent is shown when `--first-parent` option is given; + in that case, the output represents the changes the merge + brought _into_ the then-current branch. + +-r:: + Show recursive diffs. + +-t:: + Show the tree objects in the diff output. This implies `-r`. +endif::git-rev-list[] diff --git a/Documentation/revisions.txt b/Documentation/revisions.txt new file mode 100644 index 0000000..19314e3 --- /dev/null +++ b/Documentation/revisions.txt @@ -0,0 +1,315 @@ +SPECIFYING REVISIONS +-------------------- + +A revision parameter '<rev>' typically, but not necessarily, names a +commit object. It uses what is called an 'extended SHA-1' +syntax. Here are various ways to spell object names. The +ones listed near the end of this list name trees and +blobs contained in a commit. + +'<sha1>', e.g. 'dae86e1950b1277e545cee180551750029cfe735', 'dae86e':: + The full SHA-1 object name (40-byte hexadecimal string), or + a leading substring that is unique within the repository. + E.g. dae86e1950b1277e545cee180551750029cfe735 and dae86e both + name the same commit object if there is no other object in + your repository whose object name starts with dae86e. + +'<describeOutput>', e.g. 'v1.7.4.2-679-g3bee7fb':: + Output from `git describe`; i.e. a closest tag, optionally + followed by a dash and a number of commits, followed by a dash, a + 'g', and an abbreviated object name. + +'<refname>', e.g. 'master', 'heads/master', 'refs/heads/master':: + A symbolic ref name. E.g. 'master' typically means the commit + object referenced by 'refs/heads/master'. If you + happen to have both 'heads/master' and 'tags/master', you can + explicitly say 'heads/master' to tell Git which one you mean. + When ambiguous, a '<refname>' is disambiguated by taking the + first match in the following rules: + + . If '$GIT_DIR/<refname>' exists, that is what you mean (this is usually + useful only for 'HEAD', 'FETCH_HEAD', 'ORIG_HEAD', 'MERGE_HEAD' + and 'CHERRY_PICK_HEAD'); + + . otherwise, 'refs/<refname>' if it exists; + + . otherwise, 'refs/tags/<refname>' if it exists; + + . otherwise, 'refs/heads/<refname>' if it exists; + + . otherwise, 'refs/remotes/<refname>' if it exists; + + . otherwise, 'refs/remotes/<refname>/HEAD' if it exists. ++ +'HEAD' names the commit on which you based the changes in the working tree. +'FETCH_HEAD' records the branch which you fetched from a remote repository +with your last `git fetch` invocation. +'ORIG_HEAD' is created by commands that move your 'HEAD' in a drastic +way, to record the position of the 'HEAD' before their operation, so that +you can easily change the tip of the branch back to the state before you ran +them. +'MERGE_HEAD' records the commit(s) which you are merging into your branch +when you run `git merge`. +'CHERRY_PICK_HEAD' records the commit which you are cherry-picking +when you run `git cherry-pick`. ++ +Note that any of the 'refs/*' cases above may come either from +the '$GIT_DIR/refs' directory or from the '$GIT_DIR/packed-refs' file. +While the ref name encoding is unspecified, UTF-8 is preferred as +some output processing may assume ref names in UTF-8. + +'@':: + '@' alone is a shortcut for 'HEAD'. + +'<refname>@{<date>}', e.g. 'master@\{yesterday\}', 'HEAD@{5 minutes ago}':: + A ref followed by the suffix '@' with a date specification + enclosed in a brace + pair (e.g. '\{yesterday\}', '{1 month 2 weeks 3 days 1 hour 1 + second ago}' or '{1979-02-26 18:30:00}') specifies the value + of the ref at a prior point in time. This suffix may only be + used immediately following a ref name and the ref must have an + existing log ('$GIT_DIR/logs/<ref>'). Note that this looks up the state + of your *local* ref at a given time; e.g., what was in your local + 'master' branch last week. If you want to look at commits made during + certain times, see '--since' and '--until'. + +'<refname>@{<n>}', e.g. 'master@\{1\}':: + A ref followed by the suffix '@' with an ordinal specification + enclosed in a brace pair (e.g. '\{1\}', '\{15\}') specifies + the n-th prior value of that ref. For example 'master@\{1\}' + is the immediate prior value of 'master' while 'master@\{5\}' + is the 5th prior value of 'master'. This suffix may only be used + immediately following a ref name and the ref must have an existing + log ('$GIT_DIR/logs/<refname>'). + +'@{<n>}', e.g. '@\{1\}':: + You can use the '@' construct with an empty ref part to get at a + reflog entry of the current branch. For example, if you are on + branch 'blabla' then '@\{1\}' means the same as 'blabla@\{1\}'. + +'@{-<n>}', e.g. '@{-1}':: + The construct '@{-<n>}' means the <n>th branch/commit checked out + before the current one. + +'<branchname>@\{upstream\}', e.g. 'master@\{upstream\}', '@\{u\}':: + The suffix '@\{upstream\}' to a branchname (short form '<branchname>@\{u\}') + refers to the branch that the branch specified by branchname is set to build on + top of (configured with `branch.<name>.remote` and + `branch.<name>.merge`). A missing branchname defaults to the + current one. + +'<branchname>@\{push\}', e.g. 'master@\{push\}', '@\{push\}':: + The suffix '@\{push}' reports the branch "where we would push to" if + `git push` were run while `branchname` was checked out (or the current + 'HEAD' if no branchname is specified). Since our push destination is + in a remote repository, of course, we report the local tracking branch + that corresponds to that branch (i.e., something in 'refs/remotes/'). ++ +Here's an example to make it more clear: ++ +------------------------------ +$ git config push.default current +$ git config remote.pushdefault myfork +$ git checkout -b mybranch origin/master + +$ git rev-parse --symbolic-full-name @{upstream} +refs/remotes/origin/master + +$ git rev-parse --symbolic-full-name @{push} +refs/remotes/myfork/mybranch +------------------------------ ++ +Note in the example that we set up a triangular workflow, where we pull +from one location and push to another. In a non-triangular workflow, +'@\{push}' is the same as '@\{upstream}', and there is no need for it. + +'<rev>{caret}', e.g. 'HEAD{caret}, v1.5.1{caret}0':: + A suffix '{caret}' to a revision parameter means the first parent of + that commit object. '{caret}<n>' means the <n>th parent (i.e. + '<rev>{caret}' + is equivalent to '<rev>{caret}1'). As a special rule, + '<rev>{caret}0' means the commit itself and is used when '<rev>' is the + object name of a tag object that refers to a commit object. + +'<rev>{tilde}<n>', e.g. 'master{tilde}3':: + A suffix '{tilde}<n>' to a revision parameter means the commit + object that is the <n>th generation ancestor of the named + commit object, following only the first parents. I.e. '<rev>{tilde}3' is + equivalent to '<rev>{caret}{caret}{caret}' which is equivalent to + '<rev>{caret}1{caret}1{caret}1'. See below for an illustration of + the usage of this form. + +'<rev>{caret}{<type>}', e.g. 'v0.99.8{caret}\{commit\}':: + A suffix '{caret}' followed by an object type name enclosed in + brace pair means dereference the object at '<rev>' recursively until + an object of type '<type>' is found or the object cannot be + dereferenced anymore (in which case, barf). + For example, if '<rev>' is a commit-ish, '<rev>{caret}\{commit\}' + describes the corresponding commit object. + Similarly, if '<rev>' is a tree-ish, '<rev>{caret}\{tree\}' + describes the corresponding tree object. + '<rev>{caret}0' + is a short-hand for '<rev>{caret}\{commit\}'. ++ +'rev{caret}\{object\}' can be used to make sure 'rev' names an +object that exists, without requiring 'rev' to be a tag, and +without dereferencing 'rev'; because a tag is already an object, +it does not have to be dereferenced even once to get to an object. ++ +'rev{caret}\{tag\}' can be used to ensure that 'rev' identifies an +existing tag object. + +'<rev>{caret}{}', e.g. 'v0.99.8{caret}{}':: + A suffix '{caret}' followed by an empty brace pair + means the object could be a tag, + and dereference the tag recursively until a non-tag object is + found. + +'<rev>{caret}{/<text>}', e.g. 'HEAD^{/fix nasty bug}':: + A suffix '{caret}' to a revision parameter, followed by a brace + pair that contains a text led by a slash, + is the same as the ':/fix nasty bug' syntax below except that + it returns the youngest matching commit which is reachable from + the '<rev>' before '{caret}'. + +':/<text>', e.g. ':/fix nasty bug':: + A colon, followed by a slash, followed by a text, names + a commit whose commit message matches the specified regular expression. + This name returns the youngest matching commit which is + reachable from any ref. The regular expression can match any part of the + commit message. To match messages starting with a string, one can use + e.g. ':/^foo'. The special sequence ':/!' is reserved for modifiers to what + is matched. ':/!-foo' performs a negative match, while ':/!!foo' matches a + literal '!' character, followed by 'foo'. Any other sequence beginning with + ':/!' is reserved for now. + +'<rev>:<path>', e.g. 'HEAD:README', ':README', 'master:./README':: + A suffix ':' followed by a path names the blob or tree + at the given path in the tree-ish object named by the part + before the colon. + ':path' (with an empty part before the colon) + is a special case of the syntax described next: content + recorded in the index at the given path. + A path starting with './' or '../' is relative to the current working directory. + The given path will be converted to be relative to the working tree's root directory. + This is most useful to address a blob or tree from a commit or tree that has + the same tree structure as the working tree. + +':<n>:<path>', e.g. ':0:README', ':README':: + A colon, optionally followed by a stage number (0 to 3) and a + colon, followed by a path, names a blob object in the + index at the given path. A missing stage number (and the colon + that follows it) names a stage 0 entry. During a merge, stage + 1 is the common ancestor, stage 2 is the target branch's version + (typically the current branch), and stage 3 is the version from + the branch which is being merged. + +Here is an illustration, by Jon Loeliger. Both commit nodes B +and C are parents of commit node A. Parent commits are ordered +left-to-right. + +........................................ +G H I J + \ / \ / + D E F + \ | / \ + \ | / | + \|/ | + B C + \ / + \ / + A +........................................ + + A = = A^0 + B = A^ = A^1 = A~1 + C = A^2 = A^2 + D = A^^ = A^1^1 = A~2 + E = B^2 = A^^2 + F = B^3 = A^^3 + G = A^^^ = A^1^1^1 = A~3 + H = D^2 = B^^2 = A^^^2 = A~2^2 + I = F^ = B^3^ = A^^3^ + J = F^2 = B^3^2 = A^^3^2 + + +SPECIFYING RANGES +----------------- + +History traversing commands such as `git log` operate on a set +of commits, not just a single commit. To these commands, +specifying a single revision with the notation described in the +previous section means the set of commits reachable from that +commit, following the commit ancestry chain. + +To exclude commits reachable from a commit, a prefix '{caret}' +notation is used. E.g. '{caret}r1 r2' means commits reachable +from 'r2' but exclude the ones reachable from 'r1'. + +This set operation appears so often that there is a shorthand +for it. When you have two commits 'r1' and 'r2' (named according +to the syntax explained in SPECIFYING REVISIONS above), you can ask +for commits that are reachable from r2 excluding those that are reachable +from r1 by '{caret}r1 r2' and it can be written as 'r1..r2'. + +A similar notation 'r1\...r2' is called symmetric difference +of 'r1' and 'r2' and is defined as +'r1 r2 --not $(git merge-base --all r1 r2)'. +It is the set of commits that are reachable from either one of +'r1' or 'r2' but not from both. + +In these two shorthands, you can omit one end and let it default to HEAD. +For example, 'origin..' is a shorthand for 'origin..HEAD' and asks "What +did I do since I forked from the origin branch?" Similarly, '..origin' +is a shorthand for 'HEAD..origin' and asks "What did the origin do since +I forked from them?" Note that '..' would mean 'HEAD..HEAD' which is an +empty range that is both reachable and unreachable from HEAD. + +Two other shorthands for naming a set that is formed by a commit +and its parent commits exist. The 'r1{caret}@' notation means all +parents of 'r1'. 'r1{caret}!' includes commit 'r1' but excludes +all of its parents. + +To summarize: + +'<rev>':: + Include commits that are reachable from (i.e. ancestors of) + <rev>. + +'{caret}<rev>':: + Exclude commits that are reachable from (i.e. ancestors of) + <rev>. + +'<rev1>..<rev2>':: + Include commits that are reachable from <rev2> but exclude + those that are reachable from <rev1>. When either <rev1> or + <rev2> is omitted, it defaults to 'HEAD'. + +'<rev1>\...<rev2>':: + Include commits that are reachable from either <rev1> or + <rev2> but exclude those that are reachable from both. When + either <rev1> or <rev2> is omitted, it defaults to 'HEAD'. + +'<rev>{caret}@', e.g. 'HEAD{caret}@':: + A suffix '{caret}' followed by an at sign is the same as listing + all parents of '<rev>' (meaning, include anything reachable from + its parents, but not the commit itself). + +'<rev>{caret}!', e.g. 'HEAD{caret}!':: + A suffix '{caret}' followed by an exclamation mark is the same + as giving commit '<rev>' and then all its parents prefixed with + '{caret}' to exclude them (and their ancestors). + +Here are a handful of examples: + + D G H D + D F G H I J D F + ^G D H D + ^D B E I J F B + B..C C + B...C G H D E B C + ^D B C E I J F B C + C I J F C + C^@ I J F + C^! C + F^! D G H D F diff --git a/Documentation/sequencer.txt b/Documentation/sequencer.txt new file mode 100644 index 0000000..5747f44 --- /dev/null +++ b/Documentation/sequencer.txt @@ -0,0 +1,12 @@ +--continue:: + Continue the operation in progress using the information in + '.git/sequencer'. Can be used to continue after resolving + conflicts in a failed cherry-pick or revert. + +--quit:: + Forget about the current operation in progress. Can be used + to clear the sequencer state after a failed cherry-pick or + revert. + +--abort:: + Cancel the operation and return to the pre-sequence state. diff --git a/Documentation/technical/.gitignore b/Documentation/technical/.gitignore new file mode 100644 index 0000000..8aa891d --- /dev/null +++ b/Documentation/technical/.gitignore @@ -0,0 +1 @@ +api-index.txt diff --git a/Documentation/technical/api-allocation-growing.txt b/Documentation/technical/api-allocation-growing.txt new file mode 100644 index 0000000..5a59b54 --- /dev/null +++ b/Documentation/technical/api-allocation-growing.txt @@ -0,0 +1,39 @@ +allocation growing API +====================== + +Dynamically growing an array using realloc() is error prone and boring. + +Define your array with: + +* a pointer (`item`) that points at the array, initialized to `NULL` + (although please name the variable based on its contents, not on its + type); + +* an integer variable (`alloc`) that keeps track of how big the current + allocation is, initialized to `0`; + +* another integer variable (`nr`) to keep track of how many elements the + array currently has, initialized to `0`. + +Then before adding `n`th element to the item, call `ALLOC_GROW(item, n, +alloc)`. This ensures that the array can hold at least `n` elements by +calling `realloc(3)` and adjusting `alloc` variable. + +------------ +sometype *item; +size_t nr; +size_t alloc + +for (i = 0; i < nr; i++) + if (we like item[i] already) + return; + +/* we did not like any existing one, so add one */ +ALLOC_GROW(item, nr + 1, alloc); +item[nr++] = value you like; +------------ + +You are responsible for updating the `nr` variable. + +If you need to specify the number of elements to allocate explicitly +then use the macro `REALLOC_ARRAY(item, alloc)` instead of `ALLOC_GROW`. diff --git a/Documentation/technical/api-argv-array.txt b/Documentation/technical/api-argv-array.txt new file mode 100644 index 0000000..cfc0630 --- /dev/null +++ b/Documentation/technical/api-argv-array.txt @@ -0,0 +1,65 @@ +argv-array API +============== + +The argv-array API allows one to dynamically build and store +NULL-terminated lists. An argv-array maintains the invariant that the +`argv` member always points to a non-NULL array, and that the array is +always NULL-terminated at the element pointed to by `argv[argc]`. This +makes the result suitable for passing to functions expecting to receive +argv from main(), or the link:api-run-command.html[run-command API]. + +The link:api-string-list.html[string-list API] is similar, but cannot be +used for these purposes; instead of storing a straight string pointer, +it contains an item structure with a `util` field that is not compatible +with the traditional argv interface. + +Each `argv_array` manages its own memory. Any strings pushed into the +array are duplicated, and all memory is freed by argv_array_clear(). + +Data Structures +--------------- + +`struct argv_array`:: + + A single array. This should be initialized by assignment from + `ARGV_ARRAY_INIT`, or by calling `argv_array_init`. The `argv` + member contains the actual array; the `argc` member contains the + number of elements in the array, not including the terminating + NULL. + +Functions +--------- + +`argv_array_init`:: + Initialize an array. This is no different than assigning from + `ARGV_ARRAY_INIT`. + +`argv_array_push`:: + Push a copy of a string onto the end of the array. + +`argv_array_pushl`:: + Push a list of strings onto the end of the array. The arguments + should be a list of `const char *` strings, terminated by a NULL + argument. + +`argv_array_pushf`:: + Format a string and push it onto the end of the array. This is a + convenience wrapper combining `strbuf_addf` and `argv_array_push`. + +`argv_array_pushv`:: + Push a null-terminated array of strings onto the end of the array. + +`argv_array_pop`:: + Remove the final element from the array. If there are no + elements in the array, do nothing. + +`argv_array_clear`:: + Free all memory associated with the array and return it to the + initial, empty state. + +`argv_array_detach`:: + Disconnect the `argv` member from the `argv_array` struct and + return it. The caller is responsible for freeing the memory used + by the array, and by the strings it references. After detaching, + the `argv_array` is in a reinitialized state and can be pushed + into again. diff --git a/Documentation/technical/api-builtin.txt b/Documentation/technical/api-builtin.txt new file mode 100644 index 0000000..22a39b9 --- /dev/null +++ b/Documentation/technical/api-builtin.txt @@ -0,0 +1,73 @@ +builtin API +=========== + +Adding a new built-in +--------------------- + +There are 4 things to do to add a built-in command implementation to +Git: + +. Define the implementation of the built-in command `foo` with + signature: + + int cmd_foo(int argc, const char **argv, const char *prefix); + +. Add the external declaration for the function to `builtin.h`. + +. Add the command to the `commands[]` table defined in `git.c`. + The entry should look like: + + { "foo", cmd_foo, <options> }, ++ +where options is the bitwise-or of: + +`RUN_SETUP`:: + If there is not a Git directory to work on, abort. If there + is a work tree, chdir to the top of it if the command was + invoked in a subdirectory. If there is no work tree, no + chdir() is done. + +`RUN_SETUP_GENTLY`:: + If there is a Git directory, chdir as per RUN_SETUP, otherwise, + don't chdir anywhere. + +`USE_PAGER`:: + + If the standard output is connected to a tty, spawn a pager and + feed our output to it. + +`NEED_WORK_TREE`:: + + Make sure there is a work tree, i.e. the command cannot act + on bare repositories. + This only makes sense when `RUN_SETUP` is also set. + +. Add `builtin/foo.o` to `BUILTIN_OBJS` in `Makefile`. + +Additionally, if `foo` is a new command, there are 3 more things to do: + +. Add tests to `t/` directory. + +. Write documentation in `Documentation/git-foo.txt`. + +. Add an entry for `git-foo` to `command-list.txt`. + +. Add an entry for `/git-foo` to `.gitignore`. + + +How a built-in is called +------------------------ + +The implementation `cmd_foo()` takes three parameters, `argc`, `argv, +and `prefix`. The first two are similar to what `main()` of a +standalone command would be called with. + +When `RUN_SETUP` is specified in the `commands[]` table, and when you +were started from a subdirectory of the work tree, `cmd_foo()` is called +after chdir(2) to the top of the work tree, and `prefix` gets the path +to the subdirectory the command started from. This allows you to +convert a user-supplied pathname (typically relative to that directory) +to a pathname relative to the top of the work tree. + +The return value from `cmd_foo()` becomes the exit status of the +command. diff --git a/Documentation/technical/api-config.txt b/Documentation/technical/api-config.txt new file mode 100644 index 0000000..20741f3 --- /dev/null +++ b/Documentation/technical/api-config.txt @@ -0,0 +1,317 @@ +config API +========== + +The config API gives callers a way to access Git configuration files +(and files which have the same syntax). See linkgit:git-config[1] for a +discussion of the config file syntax. + +General Usage +------------- + +Config files are parsed linearly, and each variable found is passed to a +caller-provided callback function. The callback function is responsible +for any actions to be taken on the config option, and is free to ignore +some options. It is not uncommon for the configuration to be parsed +several times during the run of a Git program, with different callbacks +picking out different variables useful to themselves. + +A config callback function takes three parameters: + +- the name of the parsed variable. This is in canonical "flat" form: the + section, subsection, and variable segments will be separated by dots, + and the section and variable segments will be all lowercase. E.g., + `core.ignorecase`, `diff.SomeType.textconv`. + +- the value of the found variable, as a string. If the variable had no + value specified, the value will be NULL (typically this means it + should be interpreted as boolean true). + +- a void pointer passed in by the caller of the config API; this can + contain callback-specific data + +A config callback should return 0 for success, or -1 if the variable +could not be parsed properly. + +Basic Config Querying +--------------------- + +Most programs will simply want to look up variables in all config files +that Git knows about, using the normal precedence rules. To do this, +call `git_config` with a callback function and void data pointer. + +`git_config` will read all config sources in order of increasing +priority. Thus a callback should typically overwrite previously-seen +entries with new ones (e.g., if both the user-wide `~/.gitconfig` and +repo-specific `.git/config` contain `color.ui`, the config machinery +will first feed the user-wide one to the callback, and then the +repo-specific one; by overwriting, the higher-priority repo-specific +value is left at the end). + +The `git_config_with_options` function lets the caller examine config +while adjusting some of the default behavior of `git_config`. It should +almost never be used by "regular" Git code that is looking up +configuration variables. It is intended for advanced callers like +`git-config`, which are intentionally tweaking the normal config-lookup +process. It takes two extra parameters: + +`filename`:: +If this parameter is non-NULL, it specifies the name of a file to +parse for configuration, rather than looking in the usual files. Regular +`git_config` defaults to `NULL`. + +`respect_includes`:: +Specify whether include directives should be followed in parsed files. +Regular `git_config` defaults to `1`. + +Reading Specific Files +---------------------- + +To read a specific file in git-config format, use +`git_config_from_file`. This takes the same callback and data parameters +as `git_config`. + +Querying For Specific Variables +------------------------------- + +For programs wanting to query for specific variables in a non-callback +manner, the config API provides two functions `git_config_get_value` +and `git_config_get_value_multi`. They both read values from an internal +cache generated previously from reading the config files. + +`int git_config_get_value(const char *key, const char **value)`:: + + Finds the highest-priority value for the configuration variable `key`, + stores the pointer to it in `value` and returns 0. When the + configuration variable `key` is not found, returns 1 without touching + `value`. The caller should not free or modify `value`, as it is owned + by the cache. + +`const struct string_list *git_config_get_value_multi(const char *key)`:: + + Finds and returns the value list, sorted in order of increasing priority + for the configuration variable `key`. When the configuration variable + `key` is not found, returns NULL. The caller should not free or modify + the returned pointer, as it is owned by the cache. + +`void git_config_clear(void)`:: + + Resets and invalidates the config cache. + +The config API also provides type specific API functions which do conversion +as well as retrieval for the queried variable, including: + +`int git_config_get_int(const char *key, int *dest)`:: + + Finds and parses the value to an integer for the configuration variable + `key`. Dies on error; otherwise, stores the value of the parsed integer in + `dest` and returns 0. When the configuration variable `key` is not found, + returns 1 without touching `dest`. + +`int git_config_get_ulong(const char *key, unsigned long *dest)`:: + + Similar to `git_config_get_int` but for unsigned longs. + +`int git_config_get_bool(const char *key, int *dest)`:: + + Finds and parses the value into a boolean value, for the configuration + variable `key` respecting keywords like "true" and "false". Integer + values are converted into true/false values (when they are non-zero or + zero, respectively). Other values cause a die(). If parsing is successful, + stores the value of the parsed result in `dest` and returns 0. When the + configuration variable `key` is not found, returns 1 without touching + `dest`. + +`int git_config_get_bool_or_int(const char *key, int *is_bool, int *dest)`:: + + Similar to `git_config_get_bool`, except that integers are copied as-is, + and `is_bool` flag is unset. + +`int git_config_get_maybe_bool(const char *key, int *dest)`:: + + Similar to `git_config_get_bool`, except that it returns -1 on error + rather than dying. + +`int git_config_get_string_const(const char *key, const char **dest)`:: + + Allocates and copies the retrieved string into the `dest` parameter for + the configuration variable `key`; if NULL string is given, prints an + error message and returns -1. When the configuration variable `key` is + not found, returns 1 without touching `dest`. + +`int git_config_get_string(const char *key, char **dest)`:: + + Similar to `git_config_get_string_const`, except that retrieved value + copied into the `dest` parameter is a mutable string. + +`int git_config_get_pathname(const char *key, const char **dest)`:: + + Similar to `git_config_get_string`, but expands `~` or `~user` into + the user's home directory when found at the beginning of the path. + +`git_die_config(const char *key, const char *err, ...)`:: + + First prints the error message specified by the caller in `err` and then + dies printing the line number and the file name of the highest priority + value for the configuration variable `key`. + +`void git_die_config_linenr(const char *key, const char *filename, int linenr)`:: + + Helper function which formats the die error message according to the + parameters entered. Used by `git_die_config()`. It can be used by callers + handling `git_config_get_value_multi()` to print the correct error message + for the desired value. + +See test-config.c for usage examples. + +Value Parsing Helpers +--------------------- + +To aid in parsing string values, the config API provides callbacks with +a number of helper functions, including: + +`git_config_int`:: +Parse the string to an integer, including unit factors. Dies on error; +otherwise, returns the parsed result. + +`git_config_ulong`:: +Identical to `git_config_int`, but for unsigned longs. + +`git_config_bool`:: +Parse a string into a boolean value, respecting keywords like "true" and +"false". Integer values are converted into true/false values (when they +are non-zero or zero, respectively). Other values cause a die(). If +parsing is successful, the return value is the result. + +`git_config_bool_or_int`:: +Same as `git_config_bool`, except that integers are returned as-is, and +an `is_bool` flag is unset. + +`git_config_maybe_bool`:: +Same as `git_config_bool`, except that it returns -1 on error rather +than dying. + +`git_config_string`:: +Allocates and copies the value string into the `dest` parameter; if no +string is given, prints an error message and returns -1. + +`git_config_pathname`:: +Similar to `git_config_string`, but expands `~` or `~user` into the +user's home directory when found at the beginning of the path. + +Include Directives +------------------ + +By default, the config parser does not respect include directives. +However, a caller can use the special `git_config_include` wrapper +callback to support them. To do so, you simply wrap your "real" callback +function and data pointer in a `struct config_include_data`, and pass +the wrapper to the regular config-reading functions. For example: + +------------------------------------------- +int read_file_with_include(const char *file, config_fn_t fn, void *data) +{ + struct config_include_data inc = CONFIG_INCLUDE_INIT; + inc.fn = fn; + inc.data = data; + return git_config_from_file(git_config_include, file, &inc); +} +------------------------------------------- + +`git_config` respects includes automatically. The lower-level +`git_config_from_file` does not. + +Custom Configsets +----------------- + +A `config_set` can be used to construct an in-memory cache for +config-like files that the caller specifies (i.e., files like `.gitmodules`, +`~/.gitconfig` etc.). For example, + +--------------------------------------- +struct config_set gm_config; +git_configset_init(&gm_config); +int b; +/* we add config files to the config_set */ +git_configset_add_file(&gm_config, ".gitmodules"); +git_configset_add_file(&gm_config, ".gitmodules_alt"); + +if (!git_configset_get_bool(gm_config, "submodule.frotz.ignore", &b)) { + /* hack hack hack */ +} + +/* when we are done with the configset */ +git_configset_clear(&gm_config); +---------------------------------------- + +Configset API provides functions for the above mentioned work flow, including: + +`void git_configset_init(struct config_set *cs)`:: + + Initializes the config_set `cs`. + +`int git_configset_add_file(struct config_set *cs, const char *filename)`:: + + Parses the file and adds the variable-value pairs to the `config_set`, + dies if there is an error in parsing the file. Returns 0 on success, or + -1 if the file does not exist or is inaccessible. The user has to decide + if he wants to free the incomplete configset or continue using it when + the function returns -1. + +`int git_configset_get_value(struct config_set *cs, const char *key, const char **value)`:: + + Finds the highest-priority value for the configuration variable `key` + and config set `cs`, stores the pointer to it in `value` and returns 0. + When the configuration variable `key` is not found, returns 1 without + touching `value`. The caller should not free or modify `value`, as it + is owned by the cache. + +`const struct string_list *git_configset_get_value_multi(struct config_set *cs, const char *key)`:: + + Finds and returns the value list, sorted in order of increasing priority + for the configuration variable `key` and config set `cs`. When the + configuration variable `key` is not found, returns NULL. The caller + should not free or modify the returned pointer, as it is owned by the cache. + +`void git_configset_clear(struct config_set *cs)`:: + + Clears `config_set` structure, removes all saved variable-value pairs. + +In addition to above functions, the `config_set` API provides type specific +functions in the vein of `git_config_get_int` and family but with an extra +parameter, pointer to struct `config_set`. +They all behave similarly to the `git_config_get*()` family described in +"Querying For Specific Variables" above. + +Writing Config Files +-------------------- + +Git gives multiple entry points in the Config API to write config values to +files namely `git_config_set_in_file` and `git_config_set`, which write to +a specific config file or to `.git/config` respectively. They both take a +key/value pair as parameter. +In the end they both call `git_config_set_multivar_in_file` which takes four +parameters: + +- the name of the file, as a string, to which key/value pairs will be written. + +- the name of key, as a string. This is in canonical "flat" form: the section, + subsection, and variable segments will be separated by dots, and the section + and variable segments will be all lowercase. + E.g., `core.ignorecase`, `diff.SomeType.textconv`. + +- the value of the variable, as a string. If value is equal to NULL, it will + remove the matching key from the config file. + +- the value regex, as a string. It will disregard key/value pairs where value + does not match. + +- a multi_replace value, as an int. If value is equal to zero, nothing or only + one matching key/value is replaced, else all matching key/values (regardless + how many) are removed, before the new pair is written. + +It returns 0 on success. + +Also, there are functions `git_config_rename_section` and +`git_config_rename_section_in_file` with parameters `old_name` and `new_name` +for renaming or removing sections in the config files. If NULL is passed +through `new_name` parameter, the section will be removed from the config file. diff --git a/Documentation/technical/api-credentials.txt b/Documentation/technical/api-credentials.txt new file mode 100644 index 0000000..75368f2 --- /dev/null +++ b/Documentation/technical/api-credentials.txt @@ -0,0 +1,271 @@ +credentials API +=============== + +The credentials API provides an abstracted way of gathering username and +password credentials from the user (even though credentials in the wider +world can take many forms, in this document the word "credential" always +refers to a username and password pair). + +This document describes two interfaces: the C API that the credential +subsystem provides to the rest of Git, and the protocol that Git uses to +communicate with system-specific "credential helpers". If you are +writing Git code that wants to look up or prompt for credentials, see +the section "C API" below. If you want to write your own helper, see +the section on "Credential Helpers" below. + +Typical setup +------------- + +------------ ++-----------------------+ +| Git code (C) |--- to server requiring ---> +| | authentication +|.......................| +| C credential API |--- prompt ---> User ++-----------------------+ + ^ | + | pipe | + | v ++-----------------------+ +| Git credential helper | ++-----------------------+ +------------ + +The Git code (typically a remote-helper) will call the C API to obtain +credential data like a login/password pair (credential_fill). The +API will itself call a remote helper (e.g. "git credential-cache" or +"git credential-store") that may retrieve credential data from a +store. If the credential helper cannot find the information, the C API +will prompt the user. Then, the caller of the API takes care of +contacting the server, and does the actual authentication. + +C API +----- + +The credential C API is meant to be called by Git code which needs to +acquire or store a credential. It is centered around an object +representing a single credential and provides three basic operations: +fill (acquire credentials by calling helpers and/or prompting the user), +approve (mark a credential as successfully used so that it can be stored +for later use), and reject (mark a credential as unsuccessful so that it +can be erased from any persistent storage). + +Data Structures +~~~~~~~~~~~~~~~ + +`struct credential`:: + + This struct represents a single username/password combination + along with any associated context. All string fields should be + heap-allocated (or NULL if they are not known or not applicable). + The meaning of the individual context fields is the same as + their counterparts in the helper protocol; see the section below + for a description of each field. ++ +The `helpers` member of the struct is a `string_list` of helpers. Each +string specifies an external helper which will be run, in order, to +either acquire or store credentials. See the section on credential +helpers below. This list is filled-in by the API functions +according to the corresponding configuration variables before +consulting helpers, so there usually is no need for a caller to +modify the helpers field at all. ++ +This struct should always be initialized with `CREDENTIAL_INIT` or +`credential_init`. + + +Functions +~~~~~~~~~ + +`credential_init`:: + + Initialize a credential structure, setting all fields to empty. + +`credential_clear`:: + + Free any resources associated with the credential structure, + returning it to a pristine initialized state. + +`credential_fill`:: + + Instruct the credential subsystem to fill the username and + password fields of the passed credential struct by first + consulting helpers, then asking the user. After this function + returns, the username and password fields of the credential are + guaranteed to be non-NULL. If an error occurs, the function will + die(). + +`credential_reject`:: + + Inform the credential subsystem that the provided credentials + have been rejected. This will cause the credential subsystem to + notify any helpers of the rejection (which allows them, for + example, to purge the invalid credentials from storage). It + will also free() the username and password fields of the + credential and set them to NULL (readying the credential for + another call to `credential_fill`). Any errors from helpers are + ignored. + +`credential_approve`:: + + Inform the credential subsystem that the provided credentials + were successfully used for authentication. This will cause the + credential subsystem to notify any helpers of the approval, so + that they may store the result to be used again. Any errors + from helpers are ignored. + +`credential_from_url`:: + + Parse a URL into broken-down credential fields. + +Example +~~~~~~~ + +The example below shows how the functions of the credential API could be +used to login to a fictitious "foo" service on a remote host: + +----------------------------------------------------------------------- +int foo_login(struct foo_connection *f) +{ + int status; + /* + * Create a credential with some context; we don't yet know the + * username or password. + */ + + struct credential c = CREDENTIAL_INIT; + c.protocol = xstrdup("foo"); + c.host = xstrdup(f->hostname); + + /* + * Fill in the username and password fields by contacting + * helpers and/or asking the user. The function will die if it + * fails. + */ + credential_fill(&c); + + /* + * Otherwise, we have a username and password. Try to use it. + */ + status = send_foo_login(f, c.username, c.password); + switch (status) { + case FOO_OK: + /* It worked. Store the credential for later use. */ + credential_accept(&c); + break; + case FOO_BAD_LOGIN: + /* Erase the credential from storage so we don't try it + * again. */ + credential_reject(&c); + break; + default: + /* + * Some other error occurred. We don't know if the + * credential is good or bad, so report nothing to the + * credential subsystem. + */ + } + + /* Free any associated resources. */ + credential_clear(&c); + + return status; +} +----------------------------------------------------------------------- + + +Credential Helpers +------------------ + +Credential helpers are programs executed by Git to fetch or save +credentials from and to long-term storage (where "long-term" is simply +longer than a single Git process; e.g., credentials may be stored +in-memory for a few minutes, or indefinitely on disk). + +Each helper is specified by a single string in the configuration +variable `credential.helper` (and others, see linkgit:git-config[1]). +The string is transformed by Git into a command to be executed using +these rules: + + 1. If the helper string begins with "!", it is considered a shell + snippet, and everything after the "!" becomes the command. + + 2. Otherwise, if the helper string begins with an absolute path, the + verbatim helper string becomes the command. + + 3. Otherwise, the string "git credential-" is prepended to the helper + string, and the result becomes the command. + +The resulting command then has an "operation" argument appended to it +(see below for details), and the result is executed by the shell. + +Here are some example specifications: + +---------------------------------------------------- +# run "git credential-foo" +foo + +# same as above, but pass an argument to the helper +foo --bar=baz + +# the arguments are parsed by the shell, so use shell +# quoting if necessary +foo --bar="whitespace arg" + +# you can also use an absolute path, which will not use the git wrapper +/path/to/my/helper --with-arguments + +# or you can specify your own shell snippet +!f() { echo "password=`cat $HOME/.secret`"; }; f +---------------------------------------------------- + +Generally speaking, rule (3) above is the simplest for users to specify. +Authors of credential helpers should make an effort to assist their +users by naming their program "git-credential-$NAME", and putting it in +the $PATH or $GIT_EXEC_PATH during installation, which will allow a user +to enable it with `git config credential.helper $NAME`. + +When a helper is executed, it will have one "operation" argument +appended to its command line, which is one of: + +`get`:: + + Return a matching credential, if any exists. + +`store`:: + + Store the credential, if applicable to the helper. + +`erase`:: + + Remove a matching credential, if any, from the helper's storage. + +The details of the credential will be provided on the helper's stdin +stream. The exact format is the same as the input/output format of the +`git credential` plumbing command (see the section `INPUT/OUTPUT +FORMAT` in linkgit:git-credential[1] for a detailed specification). + +For a `get` operation, the helper should produce a list of attributes +on stdout in the same format. A helper is free to produce a subset, or +even no values at all if it has nothing useful to provide. Any provided +attributes will overwrite those already known about by Git. If a helper +outputs a `quit` attribute with a value of `true` or `1`, no further +helpers will be consulted, nor will the user be prompted (if no +credential has been provided, the operation will then fail). + +For a `store` or `erase` operation, the helper's output is ignored. +If it fails to perform the requested operation, it may complain to +stderr to inform the user. If it does not support the requested +operation (e.g., a read-only store), it should silently ignore the +request. + +If a helper receives any other operation, it should silently ignore the +request. This leaves room for future operations to be added (older +helpers will just ignore the new requests). + +See also +-------- + +linkgit:gitcredentials[7] + +linkgit:git-config[1] (See configuration variables `credential.*`) diff --git a/Documentation/technical/api-decorate.txt b/Documentation/technical/api-decorate.txt new file mode 100644 index 0000000..1d52a6c --- /dev/null +++ b/Documentation/technical/api-decorate.txt @@ -0,0 +1,6 @@ +decorate API +============ + +Talk about <decorate.h> + +(Linus) diff --git a/Documentation/technical/api-diff.txt b/Documentation/technical/api-diff.txt new file mode 100644 index 0000000..8b001de --- /dev/null +++ b/Documentation/technical/api-diff.txt @@ -0,0 +1,174 @@ +diff API +======== + +The diff API is for programs that compare two sets of files (e.g. two +trees, one tree and the index) and present the found difference in +various ways. The calling program is responsible for feeding the API +pairs of files, one from the "old" set and the corresponding one from +"new" set, that are different. The library called through this API is +called diffcore, and is responsible for two things. + +* finding total rewrites (`-B`), renames (`-M`) and copies (`-C`), and + changes that touch a string (`-S`), as specified by the caller. + +* outputting the differences in various formats, as specified by the + caller. + +Calling sequence +---------------- + +* Prepare `struct diff_options` to record the set of diff options, and + then call `diff_setup()` to initialize this structure. This sets up + the vanilla default. + +* Fill in the options structure to specify desired output format, rename + detection, etc. `diff_opt_parse()` can be used to parse options given + from the command line in a way consistent with existing git-diff + family of programs. + +* Call `diff_setup_done()`; this inspects the options set up so far for + internal consistency and make necessary tweaking to it (e.g. if + textual patch output was asked, recursive behaviour is turned on); + the callback set_default in diff_options can be used to tweak this more. + +* As you find different pairs of files, call `diff_change()` to feed + modified files, `diff_addremove()` to feed created or deleted files, + or `diff_unmerge()` to feed a file whose state is 'unmerged' to the + API. These are thin wrappers to a lower-level `diff_queue()` function + that is flexible enough to record any of these kinds of changes. + +* Once you finish feeding the pairs of files, call `diffcore_std()`. + This will tell the diffcore library to go ahead and do its work. + +* Calling `diff_flush()` will produce the output. + + +Data structures +--------------- + +* `struct diff_filespec` + +This is the internal representation for a single file (blob). It +records the blob object name (if known -- for a work tree file it +typically is a NUL SHA-1), filemode and pathname. This is what the +`diff_addremove()`, `diff_change()` and `diff_unmerge()` synthesize and +feed `diff_queue()` function with. + +* `struct diff_filepair` + +This records a pair of `struct diff_filespec`; the filespec for a file +in the "old" set (i.e. preimage) is called `one`, and the filespec for a +file in the "new" set (i.e. postimage) is called `two`. A change that +represents file creation has NULL in `one`, and file deletion has NULL +in `two`. + +A `filepair` starts pointing at `one` and `two` that are from the same +filename, but `diffcore_std()` can break pairs and match component +filespecs with other filespecs from a different filepair to form new +filepair. This is called 'rename detection'. + +* `struct diff_queue` + +This is a collection of filepairs. Notable members are: + +`queue`:: + + An array of pointers to `struct diff_filepair`. This + dynamically grows as you add filepairs; + +`alloc`:: + + The allocated size of the `queue` array; + +`nr`:: + + The number of elements in the `queue` array. + + +* `struct diff_options` + +This describes the set of options the calling program wants to affect +the operation of diffcore library with. + +Notable members are: + +`output_format`:: + The output format used when `diff_flush()` is run. + +`context`:: + Number of context lines to generate in patch output. + +`break_opt`, `detect_rename`, `rename-score`, `rename_limit`:: + Affects the way detection logic for complete rewrites, renames + and copies. + +`abbrev`:: + Number of hexdigits to abbreviate raw format output to. + +`pickaxe`:: + A constant string (can and typically does contain newlines to + look for a block of text, not just a single line) to filter out + the filepairs that do not change the number of strings contained + in its preimage and postimage of the diff_queue. + +`flags`:: + This is mostly a collection of boolean options that affects the + operation, but some do not have anything to do with the diffcore + library. + +`touched_flags`:: + Records whether a flag has been changed due to user request + (rather than just set/unset by default). + +`set_default`:: + Callback which allows tweaking the options in diff_setup_done(). + +BINARY, TEXT;; + Affects the way how a file that is seemingly binary is treated. + +FULL_INDEX;; + Tells the patch output format not to use abbreviated object + names on the "index" lines. + +FIND_COPIES_HARDER;; + Tells the diffcore library that the caller is feeding unchanged + filepairs to allow copies from unmodified files be detected. + +COLOR_DIFF;; + Output should be colored. + +COLOR_DIFF_WORDS;; + Output is a colored word-diff. + +NO_INDEX;; + Tells diff-files that the input is not tracked files but files + in random locations on the filesystem. + +ALLOW_EXTERNAL;; + Tells output routine that it is Ok to call user specified patch + output routine. Plumbing disables this to ensure stable output. + +QUIET;; + Do not show any output. + +REVERSE_DIFF;; + Tells the library that the calling program is feeding the + filepairs reversed; `one` is two, and `two` is one. + +EXIT_WITH_STATUS;; + For communication between the calling program and the options + parser; tell the calling program to signal the presence of + difference using program exit code. + +HAS_CHANGES;; + Internal; used for optimization to see if there is any change. + +SILENT_ON_REMOVE;; + Affects if diff-files shows removed files. + +RECURSIVE, TREE_IN_RECURSIVE;; + Tells if tree traversal done by tree-diff should recursively + descend into a tree object pair that are different in preimage + and postimage set. + +(JC) diff --git a/Documentation/technical/api-directory-listing.txt b/Documentation/technical/api-directory-listing.txt new file mode 100644 index 0000000..7f8e78d --- /dev/null +++ b/Documentation/technical/api-directory-listing.txt @@ -0,0 +1,105 @@ +directory listing API +===================== + +The directory listing API is used to enumerate paths in the work tree, +optionally taking `.git/info/exclude` and `.gitignore` files per +directory into account. + +Data structure +-------------- + +`struct dir_struct` structure is used to pass directory traversal +options to the library and to record the paths discovered. A single +`struct dir_struct` is used regardless of whether or not the traversal +recursively descends into subdirectories. + +The notable options are: + +`exclude_per_dir`:: + + The name of the file to be read in each directory for excluded + files (typically `.gitignore`). + +`flags`:: + + A bit-field of options (the `*IGNORED*` flags are mutually exclusive): + +`DIR_SHOW_IGNORED`::: + + Return just ignored files in `entries[]`, not untracked files. + +`DIR_SHOW_IGNORED_TOO`::: + + Similar to `DIR_SHOW_IGNORED`, but return ignored files in `ignored[]` + in addition to untracked files in `entries[]`. + +`DIR_COLLECT_IGNORED`::: + + Special mode for git-add. Return ignored files in `ignored[]` and + untracked files in `entries[]`. Only returns ignored files that match + pathspec exactly (no wildcards). Does not recurse into ignored + directories. + +`DIR_SHOW_OTHER_DIRECTORIES`::: + + Include a directory that is not tracked. + +`DIR_HIDE_EMPTY_DIRECTORIES`::: + + Do not include a directory that is not tracked and is empty. + +`DIR_NO_GITLINKS`::: + + If set, recurse into a directory that looks like a Git + directory. Otherwise it is shown as a directory. + +The result of the enumeration is left in these fields: + +`entries[]`:: + + An array of `struct dir_entry`, each element of which describes + a path. + +`nr`:: + + The number of members in `entries[]` array. + +`alloc`:: + + Internal use; keeps track of allocation of `entries[]` array. + +`ignored[]`:: + + An array of `struct dir_entry`, used for ignored paths with the + `DIR_SHOW_IGNORED_TOO` and `DIR_COLLECT_IGNORED` flags. + +`ignored_nr`:: + + The number of members in `ignored[]` array. + +Calling sequence +---------------- + +Note: index may be looked at for .gitignore files that are CE_SKIP_WORKTREE +marked. If you to exclude files, make sure you have loaded index first. + +* Prepare `struct dir_struct dir` and clear it with `memset(&dir, 0, + sizeof(dir))`. + +* To add single exclude pattern, call `add_exclude_list()` and then + `add_exclude()`. + +* To add patterns from a file (e.g. `.git/info/exclude`), call + `add_excludes_from_file()` , and/or set `dir.exclude_per_dir`. A + short-hand function `setup_standard_excludes()` can be used to set + up the standard set of exclude settings. + +* Set options described in the Data Structure section above. + +* Call `read_directory()`. + +* Use `dir.entries[]`. + +* Call `clear_directory()` when none of the contained elements are no longer in use. + +(JC) diff --git a/Documentation/technical/api-error-handling.txt b/Documentation/technical/api-error-handling.txt new file mode 100644 index 0000000..ceeedd4 --- /dev/null +++ b/Documentation/technical/api-error-handling.txt @@ -0,0 +1,75 @@ +Error reporting in git +====================== + +`die`, `usage`, `error`, and `warning` report errors of various +kinds. + +- `die` is for fatal application errors. It prints a message to + the user and exits with status 128. + +- `usage` is for errors in command line usage. After printing its + message, it exits with status 129. (See also `usage_with_options` + in the link:api-parse-options.html[parse-options API].) + +- `error` is for non-fatal library errors. It prints a message + to the user and returns -1 for convenience in signaling the error + to the caller. + +- `warning` is for reporting situations that probably should not + occur but which the user (and Git) can continue to work around + without running into too many problems. Like `error`, it + returns -1 after reporting the situation to the caller. + +Customizable error handlers +--------------------------- + +The default behavior of `die` and `error` is to write a message to +stderr and then exit or return as appropriate. This behavior can be +overridden using `set_die_routine` and `set_error_routine`. For +example, "git daemon" uses set_die_routine to write the reason `die` +was called to syslog before exiting. + +Library errors +-------------- + +Functions return a negative integer on error. Details beyond that +vary from function to function: + +- Some functions return -1 for all errors. Others return a more + specific value depending on how the caller might want to react + to the error. + +- Some functions report the error to stderr with `error`, + while others leave that for the caller to do. + +- errno is not meaningful on return from most functions (except + for thin wrappers for system calls). + +Check the function's API documentation to be sure. + +Caller-handled errors +--------------------- + +An increasing number of functions take a parameter 'struct strbuf *err'. +On error, such functions append a message about what went wrong to the +'err' strbuf. The message is meant to be complete enough to be passed +to `die` or `error` as-is. For example: + + if (ref_transaction_commit(transaction, &err)) + die("%s", err.buf); + +The 'err' parameter will be untouched if no error occurred, so multiple +function calls can be chained: + + t = ref_transaction_begin(&err); + if (!t || + ref_transaction_update(t, "HEAD", ..., &err) || + ret_transaction_commit(t, &err)) + die("%s", err.buf); + +The 'err' parameter must be a pointer to a valid strbuf. To silence +a message, pass a strbuf that is explicitly ignored: + + if (thing_that_can_fail_in_an_ignorable_way(..., &err)) + /* This failure is okay. */ + strbuf_reset(&err); diff --git a/Documentation/technical/api-gitattributes.txt b/Documentation/technical/api-gitattributes.txt new file mode 100644 index 0000000..2602668 --- /dev/null +++ b/Documentation/technical/api-gitattributes.txt @@ -0,0 +1,128 @@ +gitattributes API +================= + +gitattributes mechanism gives a uniform way to associate various +attributes to set of paths. + + +Data Structure +-------------- + +`struct git_attr`:: + + An attribute is an opaque object that is identified by its name. + Pass the name to `git_attr()` function to obtain the object of + this type. The internal representation of this structure is + of no interest to the calling programs. The name of the + attribute can be retrieved by calling `git_attr_name()`. + +`struct git_attr_check`:: + + This structure represents a set of attributes to check in a call + to `git_check_attr()` function, and receives the results. + + +Attribute Values +---------------- + +An attribute for a path can be in one of four states: Set, Unset, +Unspecified or set to a string, and `.value` member of `struct +git_attr_check` records it. There are three macros to check these: + +`ATTR_TRUE()`:: + + Returns true if the attribute is Set for the path. + +`ATTR_FALSE()`:: + + Returns true if the attribute is Unset for the path. + +`ATTR_UNSET()`:: + + Returns true if the attribute is Unspecified for the path. + +If none of the above returns true, `.value` member points at a string +value of the attribute for the path. + + +Querying Specific Attributes +---------------------------- + +* Prepare an array of `struct git_attr_check` to define the list of + attributes you would want to check. To populate this array, you would + need to define necessary attributes by calling `git_attr()` function. + +* Call `git_check_attr()` to check the attributes for the path. + +* Inspect `git_attr_check` structure to see how each of the attribute in + the array is defined for the path. + + +Example +------- + +To see how attributes "crlf" and "indent" are set for different paths. + +. Prepare an array of `struct git_attr_check` with two elements (because + we are checking two attributes). Initialize their `attr` member with + pointers to `struct git_attr` obtained by calling `git_attr()`: + +------------ +static struct git_attr_check check[2]; +static void setup_check(void) +{ + if (check[0].attr) + return; /* already done */ + check[0].attr = git_attr("crlf"); + check[1].attr = git_attr("ident"); +} +------------ + +. Call `git_check_attr()` with the prepared array of `struct git_attr_check`: + +------------ + const char *path; + + setup_check(); + git_check_attr(path, ARRAY_SIZE(check), check); +------------ + +. Act on `.value` member of the result, left in `check[]`: + +------------ + const char *value = check[0].value; + + if (ATTR_TRUE(value)) { + The attribute is Set, by listing only the name of the + attribute in the gitattributes file for the path. + } else if (ATTR_FALSE(value)) { + The attribute is Unset, by listing the name of the + attribute prefixed with a dash - for the path. + } else if (ATTR_UNSET(value)) { + The attribute is neither set nor unset for the path. + } else if (!strcmp(value, "input")) { + If none of ATTR_TRUE(), ATTR_FALSE(), or ATTR_UNSET() is + true, the value is a string set in the gitattributes + file for the path by saying "attr=value". + } else if (... other check using value as string ...) { + ... + } +------------ + + +Querying All Attributes +----------------------- + +To get the values of all attributes associated with a file: + +* Call `git_all_attrs()`, which returns an array of `git_attr_check` + structures. + +* Iterate over the `git_attr_check` array to examine the attribute + names and values. The name of the attribute described by a + `git_attr_check` object can be retrieved via + `git_attr_name(check[i].attr)`. (Please note that no items will be + returned for unset attributes, so `ATTR_UNSET()` will return false + for all returned `git_array_check` objects.) + +* Free the `git_array_check` array. diff --git a/Documentation/technical/api-grep.txt b/Documentation/technical/api-grep.txt new file mode 100644 index 0000000..a69cc89 --- /dev/null +++ b/Documentation/technical/api-grep.txt @@ -0,0 +1,8 @@ +grep API +======== + +Talk about <grep.h>, things like: + +* grep_buffer() + +(JC) diff --git a/Documentation/technical/api-hashmap.txt b/Documentation/technical/api-hashmap.txt new file mode 100644 index 0000000..ad7a5bd --- /dev/null +++ b/Documentation/technical/api-hashmap.txt @@ -0,0 +1,280 @@ +hashmap API +=========== + +The hashmap API is a generic implementation of hash-based key-value mappings. + +Data Structures +--------------- + +`struct hashmap`:: + + The hash table structure. Members can be used as follows, but should + not be modified directly: ++ +The `size` member keeps track of the total number of entries (0 means the +hashmap is empty). ++ +`tablesize` is the allocated size of the hash table. A non-0 value indicates +that the hashmap is initialized. It may also be useful for statistical purposes +(i.e. `size / tablesize` is the current load factor). ++ +`cmpfn` stores the comparison function specified in `hashmap_init()`. In +advanced scenarios, it may be useful to change this, e.g. to switch between +case-sensitive and case-insensitive lookup. + +`struct hashmap_entry`:: + + An opaque structure representing an entry in the hash table, which must + be used as first member of user data structures. Ideally it should be + followed by an int-sized member to prevent unused memory on 64-bit + systems due to alignment. ++ +The `hash` member is the entry's hash code and the `next` member points to the +next entry in case of collisions (i.e. if multiple entries map to the same +bucket). + +`struct hashmap_iter`:: + + An iterator structure, to be used with hashmap_iter_* functions. + +Types +----- + +`int (*hashmap_cmp_fn)(const void *entry, const void *entry_or_key, const void *keydata)`:: + + User-supplied function to test two hashmap entries for equality. Shall + return 0 if the entries are equal. ++ +This function is always called with non-NULL `entry` / `entry_or_key` +parameters that have the same hash code. When looking up an entry, the `key` +and `keydata` parameters to hashmap_get and hashmap_remove are always passed +as second and third argument, respectively. Otherwise, `keydata` is NULL. + +Functions +--------- + +`unsigned int strhash(const char *buf)`:: +`unsigned int strihash(const char *buf)`:: +`unsigned int memhash(const void *buf, size_t len)`:: +`unsigned int memihash(const void *buf, size_t len)`:: + + Ready-to-use hash functions for strings, using the FNV-1 algorithm (see + http://www.isthe.com/chongo/tech/comp/fnv). ++ +`strhash` and `strihash` take 0-terminated strings, while `memhash` and +`memihash` operate on arbitrary-length memory. ++ +`strihash` and `memihash` are case insensitive versions. + +`unsigned int sha1hash(const unsigned char *sha1)`:: + + Converts a cryptographic hash (e.g. SHA-1) into an int-sized hash code + for use in hash tables. Cryptographic hashes are supposed to have + uniform distribution, so in contrast to `memhash()`, this just copies + the first `sizeof(int)` bytes without shuffling any bits. Note that + the results will be different on big-endian and little-endian + platforms, so they should not be stored or transferred over the net. + +`void hashmap_init(struct hashmap *map, hashmap_cmp_fn equals_function, size_t initial_size)`:: + + Initializes a hashmap structure. ++ +`map` is the hashmap to initialize. ++ +The `equals_function` can be specified to compare two entries for equality. +If NULL, entries are considered equal if their hash codes are equal. ++ +If the total number of entries is known in advance, the `initial_size` +parameter may be used to preallocate a sufficiently large table and thus +prevent expensive resizing. If 0, the table is dynamically resized. + +`void hashmap_free(struct hashmap *map, int free_entries)`:: + + Frees a hashmap structure and allocated memory. ++ +`map` is the hashmap to free. ++ +If `free_entries` is true, each hashmap_entry in the map is freed as well +(using stdlib's free()). + +`void hashmap_entry_init(void *entry, unsigned int hash)`:: + + Initializes a hashmap_entry structure. ++ +`entry` points to the entry to initialize. ++ +`hash` is the hash code of the entry. + +`void *hashmap_get(const struct hashmap *map, const void *key, const void *keydata)`:: + + Returns the hashmap entry for the specified key, or NULL if not found. ++ +`map` is the hashmap structure. ++ +`key` is a hashmap_entry structure (or user data structure that starts with +hashmap_entry) that has at least been initialized with the proper hash code +(via `hashmap_entry_init`). ++ +If an entry with matching hash code is found, `key` and `keydata` are passed +to `hashmap_cmp_fn` to decide whether the entry matches the key. + +`void *hashmap_get_from_hash(const struct hashmap *map, unsigned int hash, const void *keydata)`:: + + Returns the hashmap entry for the specified hash code and key data, + or NULL if not found. ++ +`map` is the hashmap structure. ++ +`hash` is the hash code of the entry to look up. ++ +If an entry with matching hash code is found, `keydata` is passed to +`hashmap_cmp_fn` to decide whether the entry matches the key. The +`entry_or_key` parameter points to a bogus hashmap_entry structure that +should not be used in the comparison. + +`void *hashmap_get_next(const struct hashmap *map, const void *entry)`:: + + Returns the next equal hashmap entry, or NULL if not found. This can be + used to iterate over duplicate entries (see `hashmap_add`). ++ +`map` is the hashmap structure. ++ +`entry` is the hashmap_entry to start the search from, obtained via a previous +call to `hashmap_get` or `hashmap_get_next`. + +`void hashmap_add(struct hashmap *map, void *entry)`:: + + Adds a hashmap entry. This allows to add duplicate entries (i.e. + separate values with the same key according to hashmap_cmp_fn). ++ +`map` is the hashmap structure. ++ +`entry` is the entry to add. + +`void *hashmap_put(struct hashmap *map, void *entry)`:: + + Adds or replaces a hashmap entry. If the hashmap contains duplicate + entries equal to the specified entry, only one of them will be replaced. ++ +`map` is the hashmap structure. ++ +`entry` is the entry to add or replace. ++ +Returns the replaced entry, or NULL if not found (i.e. the entry was added). + +`void *hashmap_remove(struct hashmap *map, const void *key, const void *keydata)`:: + + Removes a hashmap entry matching the specified key. If the hashmap + contains duplicate entries equal to the specified key, only one of + them will be removed. ++ +`map` is the hashmap structure. ++ +`key` is a hashmap_entry structure (or user data structure that starts with +hashmap_entry) that has at least been initialized with the proper hash code +(via `hashmap_entry_init`). ++ +If an entry with matching hash code is found, `key` and `keydata` are +passed to `hashmap_cmp_fn` to decide whether the entry matches the key. ++ +Returns the removed entry, or NULL if not found. + +`void hashmap_iter_init(struct hashmap *map, struct hashmap_iter *iter)`:: +`void *hashmap_iter_next(struct hashmap_iter *iter)`:: +`void *hashmap_iter_first(struct hashmap *map, struct hashmap_iter *iter)`:: + + Used to iterate over all entries of a hashmap. ++ +`hashmap_iter_init` initializes a `hashmap_iter` structure. ++ +`hashmap_iter_next` returns the next hashmap_entry, or NULL if there are no +more entries. ++ +`hashmap_iter_first` is a combination of both (i.e. initializes the iterator +and returns the first entry, if any). + +`const char *strintern(const char *string)`:: +`const void *memintern(const void *data, size_t len)`:: + + Returns the unique, interned version of the specified string or data, + similar to the `String.intern` API in Java and .NET, respectively. + Interned strings remain valid for the entire lifetime of the process. ++ +Can be used as `[x]strdup()` or `xmemdupz` replacement, except that interned +strings / data must not be modified or freed. ++ +Interned strings are best used for short strings with high probability of +duplicates. ++ +Uses a hashmap to store the pool of interned strings. + +Usage example +------------- + +Here's a simple usage example that maps long keys to double values. +------------ +struct hashmap map; + +struct long2double { + struct hashmap_entry ent; /* must be the first member! */ + long key; + double value; +}; + +static int long2double_cmp(const struct long2double *e1, const struct long2double *e2, const void *unused) +{ + return !(e1->key == e2->key); +} + +void long2double_init(void) +{ + hashmap_init(&map, (hashmap_cmp_fn) long2double_cmp, 0); +} + +void long2double_free(void) +{ + hashmap_free(&map, 1); +} + +static struct long2double *find_entry(long key) +{ + struct long2double k; + hashmap_entry_init(&k, memhash(&key, sizeof(long))); + k.key = key; + return hashmap_get(&map, &k, NULL); +} + +double get_value(long key) +{ + struct long2double *e = find_entry(key); + return e ? e->value : 0; +} + +void set_value(long key, double value) +{ + struct long2double *e = find_entry(key); + if (!e) { + e = malloc(sizeof(struct long2double)); + hashmap_entry_init(e, memhash(&key, sizeof(long))); + e->key = key; + hashmap_add(&map, e); + } + e->value = value; +} +------------ + +Using variable-sized keys +------------------------- + +The `hashmap_entry_get` and `hashmap_entry_remove` functions expect an ordinary +`hashmap_entry` structure as key to find the correct entry. If the key data is +variable-sized (e.g. a FLEX_ARRAY string) or quite large, it is undesirable +to create a full-fledged entry structure on the heap and copy all the key data +into the structure. + +In this case, the `keydata` parameter can be used to pass +variable-sized key data directly to the comparison function, and the `key` +parameter can be a stripped-down, fixed size entry structure allocated on the +stack. + +See test-hashmap.c for an example using arbitrary-length strings as keys. diff --git a/Documentation/technical/api-history-graph.txt b/Documentation/technical/api-history-graph.txt new file mode 100644 index 0000000..18142b6 --- /dev/null +++ b/Documentation/technical/api-history-graph.txt @@ -0,0 +1,174 @@ +history graph API +================= + +The graph API is used to draw a text-based representation of the commit +history. The API generates the graph in a line-by-line fashion. + +Functions +--------- + +Core functions: + +* `graph_init()` creates a new `struct git_graph` + +* `graph_update()` moves the graph to a new commit. + +* `graph_next_line()` outputs the next line of the graph into a strbuf. It + does not add a terminating newline. + +* `graph_padding_line()` outputs a line of vertical padding in the graph. It + is similar to `graph_next_line()`, but is guaranteed to never print the line + containing the current commit. Where `graph_next_line()` would print the + commit line next, `graph_padding_line()` prints a line that simply extends + all branch lines downwards one row, leaving their positions unchanged. + +* `graph_is_commit_finished()` determines if the graph has output all lines + necessary for the current commit. If `graph_update()` is called before all + lines for the current commit have been printed, the next call to + `graph_next_line()` will output an ellipsis, to indicate that a portion of + the graph was omitted. + +The following utility functions are wrappers around `graph_next_line()` and +`graph_is_commit_finished()`. They always print the output to stdout. +They can all be called with a NULL graph argument, in which case no graph +output will be printed. + +* `graph_show_commit()` calls `graph_next_line()` and + `graph_is_commit_finished()` until one of them return non-zero. This prints + all graph lines up to, and including, the line containing this commit. + Output is printed to stdout. The last line printed does not contain a + terminating newline. + +* `graph_show_oneline()` calls `graph_next_line()` and prints the result to + stdout. The line printed does not contain a terminating newline. + +* `graph_show_padding()` calls `graph_padding_line()` and prints the result to + stdout. The line printed does not contain a terminating newline. + +* `graph_show_remainder()` calls `graph_next_line()` until + `graph_is_commit_finished()` returns non-zero. Output is printed to stdout. + The last line printed does not contain a terminating newline. Returns 1 if + output was printed, and 0 if no output was necessary. + +* `graph_show_strbuf()` prints the specified strbuf to stdout, prefixing all + lines but the first with a graph line. The caller is responsible for + ensuring graph output for the first line has already been printed to stdout. + (This can be done with `graph_show_commit()` or `graph_show_oneline()`.) If + a NULL graph is supplied, the strbuf is printed as-is. + +* `graph_show_commit_msg()` is similar to `graph_show_strbuf()`, but it also + prints the remainder of the graph, if more lines are needed after the strbuf + ends. It is better than directly calling `graph_show_strbuf()` followed by + `graph_show_remainder()` since it properly handles buffers that do not end in + a terminating newline. The output printed by `graph_show_commit_msg()` will + end in a newline if and only if the strbuf ends in a newline. + +Data structure +-------------- +`struct git_graph` is an opaque data type used to store the current graph +state. + +Calling sequence +---------------- + +* Create a `struct git_graph` by calling `graph_init()`. When using the + revision walking API, this is done automatically by `setup_revisions()` if + the '--graph' option is supplied. + +* Use the revision walking API to walk through a group of contiguous commits. + The `get_revision()` function automatically calls `graph_update()` each time + it is invoked. + +* For each commit, call `graph_next_line()` repeatedly, until + `graph_is_commit_finished()` returns non-zero. Each call go + `graph_next_line()` will output a single line of the graph. The resulting + lines will not contain any newlines. `graph_next_line()` returns 1 if the + resulting line contains the current commit, or 0 if this is merely a line + needed to adjust the graph before or after the current commit. This return + value can be used to determine where to print the commit summary information + alongside the graph output. + +Limitations +----------- + +* `graph_update()` must be called with commits in topological order. It should + not be called on a commit if it has already been invoked with an ancestor of + that commit, or the graph output will be incorrect. + +* `graph_update()` must be called on a contiguous group of commits. If + `graph_update()` is called on a particular commit, it should later be called + on all parents of that commit. Parents must not be skipped, or the graph + output will appear incorrect. ++ +`graph_update()` may be used on a pruned set of commits only if the parent list +has been rewritten so as to include only ancestors from the pruned set. + +* The graph API does not currently support reverse commit ordering. In + order to implement reverse ordering, the graphing API needs an + (efficient) mechanism to find the children of a commit. + +Sample usage +------------ + +------------ +struct commit *commit; +struct git_graph *graph = graph_init(opts); + +while ((commit = get_revision(opts)) != NULL) { + graph_update(graph, commit); + while (!graph_is_commit_finished(graph)) + { + struct strbuf sb; + int is_commit_line; + + strbuf_init(&sb, 0); + is_commit_line = graph_next_line(graph, &sb); + fputs(sb.buf, stdout); + + if (is_commit_line) + log_tree_commit(opts, commit); + else + putchar(opts->diffopt.line_termination); + } +} +------------ + +Sample output +------------- + +The following is an example of the output from the graph API. This output does +not include any commit summary information--callers are responsible for +outputting that information, if desired. + +------------ +* +* +* +|\ +* | +| | * +| \ \ +| \ \ +*-. \ \ +|\ \ \ \ +| | * | | +| | | | | * +| | | | | * +| | | | | * +| | | | | |\ +| | | | | | * +| * | | | | | +| | | | | * \ +| | | | | |\ | +| | | | * | | | +| | | | * | | | +* | | | | | | | +| |/ / / / / / +|/| / / / / / +* | | | | | | +|/ / / / / / +* | | | | | +| | | | | * +| | | | |/ +| | | | * +------------ diff --git a/Documentation/technical/api-in-core-index.txt b/Documentation/technical/api-in-core-index.txt new file mode 100644 index 0000000..adbdbf5 --- /dev/null +++ b/Documentation/technical/api-in-core-index.txt @@ -0,0 +1,21 @@ +in-core index API +================= + +Talk about <read-cache.c> and <cache-tree.c>, things like: + +* cache -> the_index macros +* read_index() +* write_index() +* ie_match_stat() and ie_modified(); how they are different and when to + use which. +* index_name_pos() +* remove_index_entry_at() +* remove_file_from_index() +* add_file_to_index() +* add_index_entry() +* refresh_index() +* discard_index() +* cache_tree_invalidate_path() +* cache_tree_update() + +(JC, Linus) diff --git a/Documentation/technical/api-index-skel.txt b/Documentation/technical/api-index-skel.txt new file mode 100644 index 0000000..eda8c19 --- /dev/null +++ b/Documentation/technical/api-index-skel.txt @@ -0,0 +1,13 @@ +Git API Documents +================= + +Git has grown a set of internal API over time. This collection +documents them. + +//////////////////////////////////////////////////////////////// +// table of contents begin +//////////////////////////////////////////////////////////////// + +//////////////////////////////////////////////////////////////// +// table of contents end +//////////////////////////////////////////////////////////////// diff --git a/Documentation/technical/api-index.sh b/Documentation/technical/api-index.sh new file mode 100755 index 0000000..9c3f413 --- /dev/null +++ b/Documentation/technical/api-index.sh @@ -0,0 +1,28 @@ +#!/bin/sh + +( + c=//////////////////////////////////////////////////////////////// + skel=api-index-skel.txt + sed -e '/^\/\/ table of contents begin/q' "$skel" + echo "$c" + + ls api-*.txt | + while read filename + do + case "$filename" in + api-index-skel.txt | api-index.txt) continue ;; + esac + title=$(sed -e 1q "$filename") + html=${filename%.txt}.html + echo "* link:$html[$title]" + done + echo "$c" + sed -n -e '/^\/\/ table of contents end/,$p' "$skel" +) >api-index.txt+ + +if test -f api-index.txt && cmp api-index.txt api-index.txt+ >/dev/null +then + rm -f api-index.txt+ +else + mv api-index.txt+ api-index.txt +fi diff --git a/Documentation/technical/api-merge.txt b/Documentation/technical/api-merge.txt new file mode 100644 index 0000000..9dc1bed --- /dev/null +++ b/Documentation/technical/api-merge.txt @@ -0,0 +1,104 @@ +merge API +========= + +The merge API helps a program to reconcile two competing sets of +improvements to some files (e.g., unregistered changes from the work +tree versus changes involved in switching to a new branch), reporting +conflicts if found. The library called through this API is +responsible for a few things. + + * determining which trees to merge (recursive ancestor consolidation); + + * lining up corresponding files in the trees to be merged (rename + detection, subtree shifting), reporting edge cases like add/add + and rename/rename conflicts to the user; + + * performing a three-way merge of corresponding files, taking + path-specific merge drivers (specified in `.gitattributes`) + into account. + +Data structures +--------------- + +* `mmbuffer_t`, `mmfile_t` + +These store data usable for use by the xdiff backend, for writing and +for reading, respectively. See `xdiff/xdiff.h` for the definitions +and `diff.c` for examples. + +* `struct ll_merge_options` + +This describes the set of options the calling program wants to affect +the operation of a low-level (single file) merge. Some options: + +`virtual_ancestor`:: + Behave as though this were part of a merge between common + ancestors in a recursive merge. + If a helper program is specified by the + `[merge "<driver>"] recursive` configuration, it will + be used (see linkgit:gitattributes[5]). + +`variant`:: + Resolve local conflicts automatically in favor + of one side or the other (as in 'git merge-file' + `--ours`/`--theirs`/`--union`). Can be `0`, + `XDL_MERGE_FAVOR_OURS`, `XDL_MERGE_FAVOR_THEIRS`, or + `XDL_MERGE_FAVOR_UNION`. + +`renormalize`:: + Resmudge and clean the "base", "theirs" and "ours" files + before merging. Use this when the merge is likely to have + overlapped with a change in smudge/clean or end-of-line + normalization rules. + +Low-level (single file) merge +----------------------------- + +`ll_merge`:: + + Perform a three-way single-file merge in core. This is + a thin wrapper around `xdl_merge` that takes the path and + any merge backend specified in `.gitattributes` or + `.git/info/attributes` into account. Returns 0 for a + clean merge. + +Calling sequence: + +* Prepare a `struct ll_merge_options` to record options. + If you have no special requests, skip this and pass `NULL` + as the `opts` parameter to use the default options. + +* Allocate an mmbuffer_t variable for the result. + +* Allocate and fill variables with the file's original content + and two modified versions (using `read_mmfile`, for example). + +* Call `ll_merge()`. + +* Read the merged content from `result_buf.ptr` and `result_buf.size`. + +* Release buffers when finished. A simple + `free(ancestor.ptr); free(ours.ptr); free(theirs.ptr); + free(result_buf.ptr);` will do. + +If the modifications do not merge cleanly, `ll_merge` will return a +nonzero value and `result_buf` will generally include a description of +the conflict bracketed by markers such as the traditional `<<<<<<<` +and `>>>>>>>`. + +The `ancestor_label`, `our_label`, and `their_label` parameters are +used to label the different sides of a conflict if the merge driver +supports this. + +Everything else +--------------- + +Talk about <merge-recursive.h> and merge_file(): + + - merge_trees() to merge with rename detection + - merge_recursive() for ancestor consolidation + - try_merge_command() for other strategies + - conflict format + - merge options + +(Daniel, Miklos, Stephan, JC) diff --git a/Documentation/technical/api-object-access.txt b/Documentation/technical/api-object-access.txt new file mode 100644 index 0000000..03bb0e9 --- /dev/null +++ b/Documentation/technical/api-object-access.txt @@ -0,0 +1,15 @@ +object access API +================= + +Talk about <sha1_file.c> and <object.h> family, things like + +* read_sha1_file() +* read_object_with_reference() +* has_sha1_file() +* write_sha1_file() +* pretend_sha1_file() +* lookup_{object,commit,tag,blob,tree} +* parse_{object,commit,tag,blob,tree} +* Use of object flags + +(JC, Shawn, Daniel, Dscho, Linus) diff --git a/Documentation/technical/api-parse-options.txt b/Documentation/technical/api-parse-options.txt new file mode 100644 index 0000000..695bd4b --- /dev/null +++ b/Documentation/technical/api-parse-options.txt @@ -0,0 +1,306 @@ +parse-options API +================= + +The parse-options API is used to parse and massage options in Git +and to provide a usage help with consistent look. + +Basics +------ + +The argument vector `argv[]` may usually contain mandatory or optional +'non-option arguments', e.g. a filename or a branch, and 'options'. +Options are optional arguments that start with a dash and +that allow to change the behavior of a command. + +* There are basically three types of options: + 'boolean' options, + options with (mandatory) 'arguments' and + options with 'optional arguments' + (i.e. a boolean option that can be adjusted). + +* There are basically two forms of options: + 'Short options' consist of one dash (`-`) and one alphanumeric + character. + 'Long options' begin with two dashes (`--`) and some + alphanumeric characters. + +* Options are case-sensitive. + Please define 'lower-case long options' only. + +The parse-options API allows: + +* 'stuck' and 'separate form' of options with arguments. + `-oArg` is stuck, `-o Arg` is separate form. + `--option=Arg` is stuck, `--option Arg` is separate form. + +* Long options may be 'abbreviated', as long as the abbreviation + is unambiguous. + +* Short options may be bundled, e.g. `-a -b` can be specified as `-ab`. + +* Boolean long options can be 'negated' (or 'unset') by prepending + `no-`, e.g. `--no-abbrev` instead of `--abbrev`. Conversely, + options that begin with `no-` can be 'negated' by removing it. + Other long options can be unset (e.g., set string to NULL, set + integer to 0) by prepending `no-`. + +* Options and non-option arguments can clearly be separated using the `--` + option, e.g. `-a -b --option -- --this-is-a-file` indicates that + `--this-is-a-file` must not be processed as an option. + +Steps to parse options +---------------------- + +. `#include "parse-options.h"` + +. define a NULL-terminated + `static const char * const builtin_foo_usage[]` array + containing alternative usage strings + +. define `builtin_foo_options` array as described below + in section 'Data Structure'. + +. in `cmd_foo(int argc, const char **argv, const char *prefix)` + call + + argc = parse_options(argc, argv, prefix, builtin_foo_options, builtin_foo_usage, flags); ++ +`parse_options()` will filter out the processed options of `argv[]` and leave the +non-option arguments in `argv[]`. +`argc` is updated appropriately because of the assignment. ++ +You can also pass NULL instead of a usage array as the fifth parameter of +parse_options(), to avoid displaying a help screen with usage info and +option list. This should only be done if necessary, e.g. to implement +a limited parser for only a subset of the options that needs to be run +before the full parser, which in turn shows the full help message. ++ +Flags are the bitwise-or of: + +`PARSE_OPT_KEEP_DASHDASH`:: + Keep the `--` that usually separates options from + non-option arguments. + +`PARSE_OPT_STOP_AT_NON_OPTION`:: + Usually the whole argument vector is massaged and reordered. + Using this flag, processing is stopped at the first non-option + argument. + +`PARSE_OPT_KEEP_ARGV0`:: + Keep the first argument, which contains the program name. It's + removed from argv[] by default. + +`PARSE_OPT_KEEP_UNKNOWN`:: + Keep unknown arguments instead of erroring out. This doesn't + work for all combinations of arguments as users might expect + it to do. E.g. if the first argument in `--unknown --known` + takes a value (which we can't know), the second one is + mistakenly interpreted as a known option. Similarly, if + `PARSE_OPT_STOP_AT_NON_OPTION` is set, the second argument in + `--unknown value` will be mistakenly interpreted as a + non-option, not as a value belonging to the unknown option, + the parser early. That's why parse_options() errors out if + both options are set. + +`PARSE_OPT_NO_INTERNAL_HELP`:: + By default, parse_options() handles `-h`, `--help` and + `--help-all` internally, by showing a help screen. This option + turns it off and allows one to add custom handlers for these + options, or to just leave them unknown. + +Data Structure +-------------- + +The main data structure is an array of the `option` struct, +say `static struct option builtin_add_options[]`. +There are some macros to easily define options: + +`OPT__ABBREV(&int_var)`:: + Add `--abbrev[=<n>]`. + +`OPT__COLOR(&int_var, description)`:: + Add `--color[=<when>]` and `--no-color`. + +`OPT__DRY_RUN(&int_var, description)`:: + Add `-n, --dry-run`. + +`OPT__FORCE(&int_var, description)`:: + Add `-f, --force`. + +`OPT__QUIET(&int_var, description)`:: + Add `-q, --quiet`. + +`OPT__VERBOSE(&int_var, description)`:: + Add `-v, --verbose`. + +`OPT_GROUP(description)`:: + Start an option group. `description` is a short string that + describes the group or an empty string. + Start the description with an upper-case letter. + +`OPT_BOOL(short, long, &int_var, description)`:: + Introduce a boolean option. `int_var` is set to one with + `--option` and set to zero with `--no-option`. + +`OPT_COUNTUP(short, long, &int_var, description)`:: + Introduce a count-up option. + `int_var` is incremented on each use of `--option`, and + reset to zero with `--no-option`. + +`OPT_BIT(short, long, &int_var, description, mask)`:: + Introduce a boolean option. + If used, `int_var` is bitwise-ored with `mask`. + +`OPT_NEGBIT(short, long, &int_var, description, mask)`:: + Introduce a boolean option. + If used, `int_var` is bitwise-anded with the inverted `mask`. + +`OPT_SET_INT(short, long, &int_var, description, integer)`:: + Introduce an integer option. + `int_var` is set to `integer` with `--option`, and + reset to zero with `--no-option`. + +`OPT_STRING(short, long, &str_var, arg_str, description)`:: + Introduce an option with string argument. + The string argument is put into `str_var`. + +`OPT_INTEGER(short, long, &int_var, description)`:: + Introduce an option with integer argument. + The integer is put into `int_var`. + +`OPT_MAGNITUDE(short, long, &unsigned_long_var, description)`:: + Introduce an option with a size argument. The argument must be a + non-negative integer and may include a suffix of 'k', 'm' or 'g' to + scale the provided value by 1024, 1024^2 or 1024^3 respectively. + The scaled value is put into `unsigned_long_var`. + +`OPT_DATE(short, long, &int_var, description)`:: + Introduce an option with date argument, see `approxidate()`. + The timestamp is put into `int_var`. + +`OPT_EXPIRY_DATE(short, long, &int_var, description)`:: + Introduce an option with expiry date argument, see `parse_expiry_date()`. + The timestamp is put into `int_var`. + +`OPT_CALLBACK(short, long, &var, arg_str, description, func_ptr)`:: + Introduce an option with argument. + The argument will be fed into the function given by `func_ptr` + and the result will be put into `var`. + See 'Option Callbacks' below for a more elaborate description. + +`OPT_FILENAME(short, long, &var, description)`:: + Introduce an option with a filename argument. + The filename will be prefixed by passing the filename along with + the prefix argument of `parse_options()` to `prefix_filename()`. + +`OPT_ARGUMENT(long, description)`:: + Introduce a long-option argument that will be kept in `argv[]`. + +`OPT_NUMBER_CALLBACK(&var, description, func_ptr)`:: + Recognize numerical options like -123 and feed the integer as + if it was an argument to the function given by `func_ptr`. + The result will be put into `var`. There can be only one such + option definition. It cannot be negated and it takes no + arguments. Short options that happen to be digits take + precedence over it. + +`OPT_COLOR_FLAG(short, long, &int_var, description)`:: + Introduce an option that takes an optional argument that can + have one of three values: "always", "never", or "auto". If the + argument is not given, it defaults to "always". The `--no-` form + works like `--long=never`; it cannot take an argument. If + "always", set `int_var` to 1; if "never", set `int_var` to 0; if + "auto", set `int_var` to 1 if stdout is a tty or a pager, + 0 otherwise. + +`OPT_NOOP_NOARG(short, long)`:: + Introduce an option that has no effect and takes no arguments. + Use it to hide deprecated options that are still to be recognized + and ignored silently. + +`OPT_PASSTHRU(short, long, &char_var, arg_str, description, flags)`:: + Introduce an option that will be reconstructed into a char* string, + which must be initialized to NULL. This is useful when you need to + pass the command-line option to another command. Any previous value + will be overwritten, so this should only be used for options where + the last one specified on the command line wins. + +`OPT_PASSTHRU_ARGV(short, long, &argv_array_var, arg_str, description, flags)`:: + Introduce an option where all instances of it on the command-line will + be reconstructed into an argv_array. This is useful when you need to + pass the command-line option, which can be specified multiple times, + to another command. + +`OPT_CMDMODE(short, long, &int_var, description, enum_val)`:: + Define an "operation mode" option, only one of which in the same + group of "operating mode" options that share the same `int_var` + can be given by the user. `enum_val` is set to `int_var` when the + option is used, but an error is reported if other "operating mode" + option has already set its value to the same `int_var`. + + +The last element of the array must be `OPT_END()`. + +If not stated otherwise, interpret the arguments as follows: + +* `short` is a character for the short option + (e.g. `'e'` for `-e`, use `0` to omit), + +* `long` is a string for the long option + (e.g. `"example"` for `--example`, use `NULL` to omit), + +* `int_var` is an integer variable, + +* `str_var` is a string variable (`char *`), + +* `arg_str` is the string that is shown as argument + (e.g. `"branch"` will result in `<branch>`). + If set to `NULL`, three dots (`...`) will be displayed. + +* `description` is a short string to describe the effect of the option. + It shall begin with a lower-case letter and a full stop (`.`) shall be + omitted at the end. + +Option Callbacks +---------------- + +The function must be defined in this form: + + int func(const struct option *opt, const char *arg, int unset) + +The callback mechanism is as follows: + +* Inside `func`, the only interesting member of the structure + given by `opt` is the void pointer `opt->value`. + `*opt->value` will be the value that is saved into `var`, if you + use `OPT_CALLBACK()`. + For example, do `*(unsigned long *)opt->value = 42;` to get 42 + into an `unsigned long` variable. + +* Return value `0` indicates success and non-zero return + value will invoke `usage_with_options()` and, thus, die. + +* If the user negates the option, `arg` is `NULL` and `unset` is 1. + +Sophisticated option parsing +---------------------------- + +If you need, for example, option callbacks with optional arguments +or without arguments at all, or if you need other special cases, +that are not handled by the macros above, you need to specify the +members of the `option` structure manually. + +This is not covered in this document, but well documented +in `parse-options.h` itself. + +Examples +-------- + +See `test-parse-options.c` and +`builtin/add.c`, +`builtin/clone.c`, +`builtin/commit.c`, +`builtin/fetch.c`, +`builtin/fsck.c`, +`builtin/rm.c` +for real-world examples. diff --git a/Documentation/technical/api-quote.txt b/Documentation/technical/api-quote.txt new file mode 100644 index 0000000..e8a1bce --- /dev/null +++ b/Documentation/technical/api-quote.txt @@ -0,0 +1,10 @@ +quote API +========= + +Talk about <quote.h>, things like + +* sq_quote and unquote +* c_style quote and unquote +* quoting for foreign languages + +(JC) diff --git a/Documentation/technical/api-ref-iteration.txt b/Documentation/technical/api-ref-iteration.txt new file mode 100644 index 0000000..37379d8 --- /dev/null +++ b/Documentation/technical/api-ref-iteration.txt @@ -0,0 +1,81 @@ +ref iteration API +================= + + +Iteration of refs is done by using an iterate function which will call a +callback function for every ref. The callback function has this +signature: + + int handle_one_ref(const char *refname, const struct object_id *oid, + int flags, void *cb_data); + +There are different kinds of iterate functions which all take a +callback of this type. The callback is then called for each found ref +until the callback returns nonzero. The returned value is then also +returned by the iterate function. + +Iteration functions +------------------- + +* `head_ref()` just iterates the head ref. + +* `for_each_ref()` iterates all refs. + +* `for_each_ref_in()` iterates all refs which have a defined prefix and + strips that prefix from the passed variable refname. + +* `for_each_tag_ref()`, `for_each_branch_ref()`, `for_each_remote_ref()`, + `for_each_replace_ref()` iterate refs from the respective area. + +* `for_each_glob_ref()` iterates all refs that match the specified glob + pattern. + +* `for_each_glob_ref_in()` the previous and `for_each_ref_in()` combined. + +* `head_ref_submodule()`, `for_each_ref_submodule()`, + `for_each_ref_in_submodule()`, `for_each_tag_ref_submodule()`, + `for_each_branch_ref_submodule()`, `for_each_remote_ref_submodule()` + do the same as the functions described above but for a specified + submodule. + +* `for_each_rawref()` can be used to learn about broken ref and symref. + +* `for_each_reflog()` iterates each reflog file. + +Submodules +---------- + +If you want to iterate the refs of a submodule you first need to add the +submodules object database. You can do this by a code-snippet like +this: + + const char *path = "path/to/submodule" + if (add_submodule_odb(path)) + die("Error submodule '%s' not populated.", path); + +`add_submodule_odb()` will return zero on success. If you +do not do this you will get an error for each ref that it does not point +to a valid object. + +Note: As a side-effect of this you can not safely assume that all +objects you lookup are available in superproject. All submodule objects +will be available the same way as the superprojects objects. + +Example: +-------- + +---- +static int handle_remote_ref(const char *refname, + const unsigned char *sha1, int flags, void *cb_data) +{ + struct strbuf *output = cb_data; + strbuf_addf(output, "%s\n", refname); + return 0; +} + +... + + struct strbuf output = STRBUF_INIT; + for_each_remote_ref(handle_remote_ref, &output); + printf("%s", output.buf); +---- diff --git a/Documentation/technical/api-remote.txt b/Documentation/technical/api-remote.txt new file mode 100644 index 0000000..f10941b --- /dev/null +++ b/Documentation/technical/api-remote.txt @@ -0,0 +1,127 @@ +Remotes configuration API +========================= + +The API in remote.h gives access to the configuration related to +remotes. It handles all three configuration mechanisms historically +and currently used by Git, and presents the information in a uniform +fashion. Note that the code also handles plain URLs without any +configuration, giving them just the default information. + +struct remote +------------- + +`name`:: + + The user's nickname for the remote + +`url`:: + + An array of all of the url_nr URLs configured for the remote + +`pushurl`:: + + An array of all of the pushurl_nr push URLs configured for the remote + +`push`:: + + An array of refspecs configured for pushing, with + push_refspec being the literal strings, and push_refspec_nr + being the quantity. + +`fetch`:: + + An array of refspecs configured for fetching, with + fetch_refspec being the literal strings, and fetch_refspec_nr + being the quantity. + +`fetch_tags`:: + + The setting for whether to fetch tags (as a separate rule from + the configured refspecs); -1 means never to fetch tags, 0 + means to auto-follow tags based on the default heuristic, 1 + means to always auto-follow tags, and 2 means to fetch all + tags. + +`receivepack`, `uploadpack`:: + + The configured helper programs to run on the remote side, for + Git-native protocols. + +`http_proxy`:: + + The proxy to use for curl (http, https, ftp, etc.) URLs. + +`http_proxy_authmethod`:: + + The method used for authenticating against `http_proxy`. + +struct remotes can be found by name with remote_get(), and iterated +through with for_each_remote(). remote_get(NULL) will return the +default remote, given the current branch and configuration. + +struct refspec +-------------- + +A struct refspec holds the parsed interpretation of a refspec. If it +will force updates (starts with a '+'), force is true. If it is a +pattern (sides end with '*') pattern is true. src and dest are the +two sides (including '*' characters if present); if there is only one +side, it is src, and dst is NULL; if sides exist but are empty (i.e., +the refspec either starts or ends with ':'), the corresponding side is +"". + +An array of strings can be parsed into an array of struct refspecs +using parse_fetch_refspec() or parse_push_refspec(). + +remote_find_tracking(), given a remote and a struct refspec with +either src or dst filled out, will fill out the other such that the +result is in the "fetch" specification for the remote (note that this +evaluates patterns and returns a single result). + +struct branch +------------- + +Note that this may end up moving to branch.h + +struct branch holds the configuration for a branch. It can be looked +up with branch_get(name) for "refs/heads/{name}", or with +branch_get(NULL) for HEAD. + +It contains: + +`name`:: + + The short name of the branch. + +`refname`:: + + The full path for the branch ref. + +`remote_name`:: + + The name of the remote listed in the configuration. + +`merge_name`:: + + An array of the "merge" lines in the configuration. + +`merge`:: + + An array of the struct refspecs used for the merge lines. That + is, merge[i]->dst is a local tracking ref which should be + merged into this branch by default. + +`merge_nr`:: + + The number of merge configurations + +branch_has_merge_config() returns true if the given branch has merge +configuration given. + +Other stuff +----------- + +There is other stuff in remote.h that is related, in general, to the +process of interacting with remotes. + +(Daniel Barkalow) diff --git a/Documentation/technical/api-revision-walking.txt b/Documentation/technical/api-revision-walking.txt new file mode 100644 index 0000000..55b878a --- /dev/null +++ b/Documentation/technical/api-revision-walking.txt @@ -0,0 +1,72 @@ +revision walking API +==================== + +The revision walking API offers functions to build a list of revisions +and then iterate over that list. + +Calling sequence +---------------- + +The walking API has a given calling sequence: first you need to +initialize a rev_info structure, then add revisions to control what kind +of revision list do you want to get, finally you can iterate over the +revision list. + +Functions +--------- + +`init_revisions`:: + + Initialize a rev_info structure with default values. The second + parameter may be NULL or can be prefix path, and then the `.prefix` + variable will be set to it. This is typically the first function you + want to call when you want to deal with a revision list. After calling + this function, you are free to customize options, like set + `.ignore_merges` to 0 if you don't want to ignore merges, and so on. See + `revision.h` for a complete list of available options. + +`add_pending_object`:: + + This function can be used if you want to add commit objects as revision + information. You can use the `UNINTERESTING` object flag to indicate if + you want to include or exclude the given commit (and commits reachable + from the given commit) from the revision list. ++ +NOTE: If you have the commits as a string list then you probably want to +use setup_revisions(), instead of parsing each string and using this +function. + +`setup_revisions`:: + + Parse revision information, filling in the `rev_info` structure, and + removing the used arguments from the argument list. Returns the number + of arguments left that weren't recognized, which are also moved to the + head of the argument list. The last parameter is used in case no + parameter given by the first two arguments. + +`prepare_revision_walk`:: + + Prepares the rev_info structure for a walk. You should check if it + returns any error (non-zero return code) and if it does not, you can + start using get_revision() to do the iteration. + +`get_revision`:: + + Takes a pointer to a `rev_info` structure and iterates over it, + returning a `struct commit *` each time you call it. The end of the + revision list is indicated by returning a NULL pointer. + +`reset_revision_walk`:: + + Reset the flags used by the revision walking api. You can use + this to do multiple sequential revision walks. + +Data structures +--------------- + +Talk about <revision.h>, things like: + +* two diff_options, one for path limiting, another for output; +* remaining functions; + +(Linus, JC, Dscho) diff --git a/Documentation/technical/api-run-command.txt b/Documentation/technical/api-run-command.txt new file mode 100644 index 0000000..8bf3e37 --- /dev/null +++ b/Documentation/technical/api-run-command.txt @@ -0,0 +1,264 @@ +run-command API +=============== + +The run-command API offers a versatile tool to run sub-processes with +redirected input and output as well as with a modified environment +and an alternate current directory. + +A similar API offers the capability to run a function asynchronously, +which is primarily used to capture the output that the function +produces in the caller in order to process it. + + +Functions +--------- + +`child_process_init`:: + + Initialize a struct child_process variable. + +`start_command`:: + + Start a sub-process. Takes a pointer to a `struct child_process` + that specifies the details and returns pipe FDs (if requested). + See below for details. + +`finish_command`:: + + Wait for the completion of a sub-process that was started with + start_command(). + +`run_command`:: + + A convenience function that encapsulates a sequence of + start_command() followed by finish_command(). Takes a pointer + to a `struct child_process` that specifies the details. + +`run_command_v_opt`, `run_command_v_opt_cd_env`:: + + Convenience functions that encapsulate a sequence of + start_command() followed by finish_command(). The argument argv + specifies the program and its arguments. The argument opt is zero + or more of the flags `RUN_COMMAND_NO_STDIN`, `RUN_GIT_CMD`, + `RUN_COMMAND_STDOUT_TO_STDERR`, or `RUN_SILENT_EXEC_FAILURE` + that correspond to the members .no_stdin, .git_cmd, + .stdout_to_stderr, .silent_exec_failure of `struct child_process`. + The argument dir corresponds the member .dir. The argument env + corresponds to the member .env. + +`child_process_clear`:: + + Release the memory associated with the struct child_process. + Most users of the run-command API don't need to call this + function explicitly because `start_command` invokes it on + failure and `finish_command` calls it automatically already. + +The functions above do the following: + +. If a system call failed, errno is set and -1 is returned. A diagnostic + is printed. + +. If the program was not found, then -1 is returned and errno is set to + ENOENT; a diagnostic is printed only if .silent_exec_failure is 0. + +. Otherwise, the program is run. If it terminates regularly, its exit + code is returned. No diagnostic is printed, even if the exit code is + non-zero. + +. If the program terminated due to a signal, then the return value is the + signal number + 128, ie. the same value that a POSIX shell's $? would + report. A diagnostic is printed. + + +`start_async`:: + + Run a function asynchronously. Takes a pointer to a `struct + async` that specifies the details and returns a set of pipe FDs + for communication with the function. See below for details. + +`finish_async`:: + + Wait for the completion of an asynchronous function that was + started with start_async(). + +`run_hook`:: + + Run a hook. + The first argument is a pathname to an index file, or NULL + if the hook uses the default index file or no index is needed. + The second argument is the name of the hook. + The further arguments correspond to the hook arguments. + The last argument has to be NULL to terminate the arguments list. + If the hook does not exist or is not executable, the return + value will be zero. + If it is executable, the hook will be executed and the exit + status of the hook is returned. + On execution, .stdout_to_stderr and .no_stdin will be set. + (See below.) + + +Data structures +--------------- + +* `struct child_process` + +This describes the arguments, redirections, and environment of a +command to run in a sub-process. + +The caller: + +1. allocates and clears (using child_process_init() or + CHILD_PROCESS_INIT) a struct child_process variable; +2. initializes the members; +3. calls start_command(); +4. processes the data; +5. closes file descriptors (if necessary; see below); +6. calls finish_command(). + +The .argv member is set up as an array of string pointers (NULL +terminated), of which .argv[0] is the program name to run (usually +without a path). If the command to run is a git command, set argv[0] to +the command name without the 'git-' prefix and set .git_cmd = 1. + +Note that the ownership of the memory pointed to by .argv stays with the +caller, but it should survive until `finish_command` completes. If the +.argv member is NULL, `start_command` will point it at the .args +`argv_array` (so you may use one or the other, but you must use exactly +one). The memory in .args will be cleaned up automatically during +`finish_command` (or during `start_command` when it is unsuccessful). + +The members .in, .out, .err are used to redirect stdin, stdout, +stderr as follows: + +. Specify 0 to request no special redirection. No new file descriptor + is allocated. The child process simply inherits the channel from the + parent. + +. Specify -1 to have a pipe allocated; start_command() replaces -1 + by the pipe FD in the following way: + + .in: Returns the writable pipe end into which the caller writes; + the readable end of the pipe becomes the child's stdin. + + .out, .err: Returns the readable pipe end from which the caller + reads; the writable end of the pipe end becomes child's + stdout/stderr. + + The caller of start_command() must close the so returned FDs + after it has completed reading from/writing to it! + +. Specify a file descriptor > 0 to be used by the child: + + .in: The FD must be readable; it becomes child's stdin. + .out: The FD must be writable; it becomes child's stdout. + .err: The FD must be writable; it becomes child's stderr. + + The specified FD is closed by start_command(), even if it fails to + run the sub-process! + +. Special forms of redirection are available by setting these members + to 1: + + .no_stdin, .no_stdout, .no_stderr: The respective channel is + redirected to /dev/null. + + .stdout_to_stderr: stdout of the child is redirected to its + stderr. This happens after stderr is itself redirected. + So stdout will follow stderr to wherever it is + redirected. + +To modify the environment of the sub-process, specify an array of +string pointers (NULL terminated) in .env: + +. If the string is of the form "VAR=value", i.e. it contains '=' + the variable is added to the child process's environment. + +. If the string does not contain '=', it names an environment + variable that will be removed from the child process's environment. + +If the .env member is NULL, `start_command` will point it at the +.env_array `argv_array` (so you may use one or the other, but not both). +The memory in .env_array will be cleaned up automatically during +`finish_command` (or during `start_command` when it is unsuccessful). + +To specify a new initial working directory for the sub-process, +specify it in the .dir member. + +If the program cannot be found, the functions return -1 and set +errno to ENOENT. Normally, an error message is printed, but if +.silent_exec_failure is set to 1, no message is printed for this +special error condition. + + +* `struct async` + +This describes a function to run asynchronously, whose purpose is +to produce output that the caller reads. + +The caller: + +1. allocates and clears (memset(&asy, 0, sizeof(asy));) a + struct async variable; +2. initializes .proc and .data; +3. calls start_async(); +4. processes communicates with proc through .in and .out; +5. closes .in and .out; +6. calls finish_async(). + +The members .in, .out are used to provide a set of fd's for +communication between the caller and the callee as follows: + +. Specify 0 to have no file descriptor passed. The callee will + receive -1 in the corresponding argument. + +. Specify < 0 to have a pipe allocated; start_async() replaces + with the pipe FD in the following way: + + .in: Returns the writable pipe end into which the caller + writes; the readable end of the pipe becomes the function's + in argument. + + .out: Returns the readable pipe end from which the caller + reads; the writable end of the pipe becomes the function's + out argument. + + The caller of start_async() must close the returned FDs after it + has completed reading from/writing from them. + +. Specify a file descriptor > 0 to be used by the function: + + .in: The FD must be readable; it becomes the function's in. + .out: The FD must be writable; it becomes the function's out. + + The specified FD is closed by start_async(), even if it fails to + run the function. + +The function pointer in .proc has the following signature: + + int proc(int in, int out, void *data); + +. in, out specifies a set of file descriptors to which the function + must read/write the data that it needs/produces. The function + *must* close these descriptors before it returns. A descriptor + may be -1 if the caller did not configure a descriptor for that + direction. + +. data is the value that the caller has specified in the .data member + of struct async. + +. The return value of the function is 0 on success and non-zero + on failure. If the function indicates failure, finish_async() will + report failure as well. + + +There are serious restrictions on what the asynchronous function can do +because this facility is implemented by a thread in the same address +space on most platforms (when pthreads is available), but by a pipe to +a forked process otherwise: + +. It cannot change the program's state (global variables, environment, + etc.) in a way that the caller notices; in other words, .in and .out + are the only communication channels to the caller. + +. It must not change the program's state that the caller of the + facility also uses. diff --git a/Documentation/technical/api-setup.txt b/Documentation/technical/api-setup.txt new file mode 100644 index 0000000..540e455 --- /dev/null +++ b/Documentation/technical/api-setup.txt @@ -0,0 +1,49 @@ +setup API +========= + +Talk about + +* setup_git_directory() +* setup_git_directory_gently() +* is_inside_git_dir() +* is_inside_work_tree() +* setup_work_tree() + +(Dscho) + +Pathspec +-------- + +See glossary-context.txt for the syntax of pathspec. In memory, a +pathspec set is represented by "struct pathspec" and is prepared by +parse_pathspec(). This function takes several arguments: + +- magic_mask specifies what features that are NOT supported by the + following code. If a user attempts to use such a feature, + parse_pathspec() can reject it early. + +- flags specifies other things that the caller wants parse_pathspec to + perform. + +- prefix and args come from cmd_* functions + +get_pathspec() is obsolete and should never be used in new code. + +parse_pathspec() helps catch unsupported features and reject them +politely. At a lower level, different pathspec-related functions may +not support the same set of features. Such pathspec-sensitive +functions are guarded with GUARD_PATHSPEC(), which will die in an +unfriendly way when an unsupported feature is requested. + +The command designers are supposed to make sure that GUARD_PATHSPEC() +never dies. They have to make sure all unsupported features are caught +by parse_pathspec(), not by GUARD_PATHSPEC. grepping GUARD_PATHSPEC() +should give the designers all pathspec-sensitive codepaths and what +features they support. + +A similar process is applied when a new pathspec magic is added. The +designer lifts the GUARD_PATHSPEC restriction in the functions that +support the new magic. At the same time (s)he has to make sure this +new feature will be caught at parse_pathspec() in commands that cannot +handle the new magic in some cases. grepping parse_pathspec() should +help. diff --git a/Documentation/technical/api-sha1-array.txt b/Documentation/technical/api-sha1-array.txt new file mode 100644 index 0000000..3e75497 --- /dev/null +++ b/Documentation/technical/api-sha1-array.txt @@ -0,0 +1,76 @@ +sha1-array API +============== + +The sha1-array API provides storage and manipulation of sets of SHA-1 +identifiers. The emphasis is on storage and processing efficiency, +making them suitable for large lists. Note that the ordering of items is +not preserved over some operations. + +Data Structures +--------------- + +`struct sha1_array`:: + + A single array of SHA-1 hashes. This should be initialized by + assignment from `SHA1_ARRAY_INIT`. The `sha1` member contains + the actual data. The `nr` member contains the number of items in + the set. The `alloc` and `sorted` members are used internally, + and should not be needed by API callers. + +Functions +--------- + +`sha1_array_append`:: + Add an item to the set. The sha1 will be placed at the end of + the array (but note that some operations below may lose this + ordering). + +`sha1_array_lookup`:: + Perform a binary search of the array for a specific sha1. + If found, returns the offset (in number of elements) of the + sha1. If not found, returns a negative integer. If the array is + not sorted, this function has the side effect of sorting it. + +`sha1_array_clear`:: + Free all memory associated with the array and return it to the + initial, empty state. + +`sha1_array_for_each_unique`:: + Efficiently iterate over each unique element of the list, + executing the callback function for each one. If the array is + not sorted, this function has the side effect of sorting it. + +Examples +-------- + +----------------------------------------- +void print_callback(const unsigned char sha1[20], + void *data) +{ + printf("%s\n", sha1_to_hex(sha1)); +} + +void some_func(void) +{ + struct sha1_array hashes = SHA1_ARRAY_INIT; + unsigned char sha1[20]; + + /* Read objects into our set */ + while (read_object_from_stdin(sha1)) + sha1_array_append(&hashes, sha1); + + /* Check if some objects are in our set */ + while (read_object_from_stdin(sha1)) { + if (sha1_array_lookup(&hashes, sha1) >= 0) + printf("it's in there!\n"); + + /* + * Print the unique set of objects. We could also have + * avoided adding duplicate objects in the first place, + * but we would end up re-sorting the array repeatedly. + * Instead, this will sort once and then skip duplicates + * in linear time. + */ + sha1_array_for_each_unique(&hashes, print_callback, NULL); +} +----------------------------------------- diff --git a/Documentation/technical/api-sigchain.txt b/Documentation/technical/api-sigchain.txt new file mode 100644 index 0000000..9e1189e --- /dev/null +++ b/Documentation/technical/api-sigchain.txt @@ -0,0 +1,41 @@ +sigchain API +============ + +Code often wants to set a signal handler to clean up temporary files or +other work-in-progress when we die unexpectedly. For multiple pieces of +code to do this without conflicting, each piece of code must remember +the old value of the handler and restore it either when: + + 1. The work-in-progress is finished, and the handler is no longer + necessary. The handler should revert to the original behavior + (either another handler, SIG_DFL, or SIG_IGN). + + 2. The signal is received. We should then do our cleanup, then chain + to the next handler (or die if it is SIG_DFL). + +Sigchain is a tiny library for keeping a stack of handlers. Your handler +and installation code should look something like: + +------------------------------------------ + void clean_foo_on_signal(int sig) + { + clean_foo(); + sigchain_pop(sig); + raise(sig); + } + + void other_func() + { + sigchain_push_common(clean_foo_on_signal); + mess_up_foo(); + clean_foo(); + } +------------------------------------------ + +Handlers are given the typedef of sigchain_fun. This is the same type +that is given to signal() or sigaction(). It is perfectly reasonable to +push SIG_DFL or SIG_IGN onto the stack. + +You can sigchain_push and sigchain_pop individual signals. For +convenience, sigchain_push_common will push the handler onto the stack +for many common signals. diff --git a/Documentation/technical/api-string-list.txt b/Documentation/technical/api-string-list.txt new file mode 100644 index 0000000..c08402b --- /dev/null +++ b/Documentation/technical/api-string-list.txt @@ -0,0 +1,209 @@ +string-list API +=============== + +The string_list API offers a data structure and functions to handle +sorted and unsorted string lists. A "sorted" list is one whose +entries are sorted by string value in `strcmp()` order. + +The 'string_list' struct used to be called 'path_list', but was renamed +because it is not specific to paths. + +The caller: + +. Allocates and clears a `struct string_list` variable. + +. Initializes the members. You might want to set the flag `strdup_strings` + if the strings should be strdup()ed. For example, this is necessary + when you add something like git_path("..."), since that function returns + a static buffer that will change with the next call to git_path(). ++ +If you need something advanced, you can manually malloc() the `items` +member (you need this if you add things later) and you should set the +`nr` and `alloc` members in that case, too. + +. Adds new items to the list, using `string_list_append`, + `string_list_append_nodup`, `string_list_insert`, + `string_list_split`, and/or `string_list_split_in_place`. + +. Can check if a string is in the list using `string_list_has_string` or + `unsorted_string_list_has_string` and get it from the list using + `string_list_lookup` for sorted lists. + +. Can sort an unsorted list using `string_list_sort`. + +. Can remove duplicate items from a sorted list using + `string_list_remove_duplicates`. + +. Can remove individual items of an unsorted list using + `unsorted_string_list_delete_item`. + +. Can remove items not matching a criterion from a sorted or unsorted + list using `filter_string_list`, or remove empty strings using + `string_list_remove_empty_items`. + +. Finally it should free the list using `string_list_clear`. + +Example: + +---- +struct string_list list = STRING_LIST_INIT_NODUP; +int i; + +string_list_append(&list, "foo"); +string_list_append(&list, "bar"); +for (i = 0; i < list.nr; i++) + printf("%s\n", list.items[i].string) +---- + +NOTE: It is more efficient to build an unsorted list and sort it +afterwards, instead of building a sorted list (`O(n log n)` instead of +`O(n^2)`). ++ +However, if you use the list to check if a certain string was added +already, you should not do that (using unsorted_string_list_has_string()), +because the complexity would be quadratic again (but with a worse factor). + +Functions +--------- + +* General ones (works with sorted and unsorted lists as well) + +`string_list_init`:: + + Initialize the members of the string_list, set `strdup_strings` + member according to the value of the second parameter. + +`filter_string_list`:: + + Apply a function to each item in a list, retaining only the + items for which the function returns true. If free_util is + true, call free() on the util members of any items that have + to be deleted. Preserve the order of the items that are + retained. + +`string_list_remove_empty_items`:: + + Remove any empty strings from the list. If free_util is true, + call free() on the util members of any items that have to be + deleted. Preserve the order of the items that are retained. + +`print_string_list`:: + + Dump a string_list to stdout, useful mainly for debugging purposes. It + can take an optional header argument and it writes out the + string-pointer pairs of the string_list, each one in its own line. + +`string_list_clear`:: + + Free a string_list. The `string` pointer of the items will be freed in + case the `strdup_strings` member of the string_list is set. The second + parameter controls if the `util` pointer of the items should be freed + or not. + +* Functions for sorted lists only + +`string_list_has_string`:: + + Determine if the string_list has a given string or not. + +`string_list_insert`:: + + Insert a new element to the string_list. The returned pointer can be + handy if you want to write something to the `util` pointer of the + string_list_item containing the just added string. If the given + string already exists the insertion will be skipped and the + pointer to the existing item returned. ++ +Since this function uses xrealloc() (which die()s if it fails) if the +list needs to grow, it is safe not to check the pointer. I.e. you may +write `string_list_insert(...)->util = ...;`. + +`string_list_lookup`:: + + Look up a given string in the string_list, returning the containing + string_list_item. If the string is not found, NULL is returned. + +`string_list_remove_duplicates`:: + + Remove all but the first of consecutive entries that have the + same string value. If free_util is true, call free() on the + util members of any items that have to be deleted. + +* Functions for unsorted lists only + +`string_list_append`:: + + Append a new string to the end of the string_list. If + `strdup_string` is set, then the string argument is copied; + otherwise the new `string_list_entry` refers to the input + string. + +`string_list_append_nodup`:: + + Append a new string to the end of the string_list. The new + `string_list_entry` always refers to the input string, even if + `strdup_string` is set. This function can be used to hand + ownership of a malloc()ed string to a `string_list` that has + `strdup_string` set. + +`string_list_sort`:: + + Sort the list's entries by string value in `strcmp()` order. + +`unsorted_string_list_has_string`:: + + It's like `string_list_has_string()` but for unsorted lists. + +`unsorted_string_list_lookup`:: + + It's like `string_list_lookup()` but for unsorted lists. ++ +The above two functions need to look through all items, as opposed to their +counterpart for sorted lists, which performs a binary search. + +`unsorted_string_list_delete_item`:: + + Remove an item from a string_list. The `string` pointer of the items + will be freed in case the `strdup_strings` member of the string_list + is set. The third parameter controls if the `util` pointer of the + items should be freed or not. + +`string_list_split`:: +`string_list_split_in_place`:: + + Split a string into substrings on a delimiter character and + append the substrings to a `string_list`. If `maxsplit` is + non-negative, then split at most `maxsplit` times. Return the + number of substrings appended to the list. ++ +`string_list_split` requires a `string_list` that has `strdup_strings` +set to true; it leaves the input string untouched and makes copies of +the substrings in newly-allocated memory. +`string_list_split_in_place` requires a `string_list` that has +`strdup_strings` set to false; it splits the input string in place, +overwriting the delimiter characters with NULs and creating new +string_list_items that point into the original string (the original +string must therefore not be modified or freed while the `string_list` +is in use). + + +Data structures +--------------- + +* `struct string_list_item` + +Represents an item of the list. The `string` member is a pointer to the +string, and you may use the `util` member for any purpose, if you want. + +* `struct string_list` + +Represents the list itself. + +. The array of items are available via the `items` member. +. The `nr` member contains the number of items stored in the list. +. The `alloc` member is used to avoid reallocating at every insertion. + You should not tamper with it. +. Setting the `strdup_strings` member to 1 will strdup() the strings + before adding them, see above. +. The `compare_strings_fn` member is used to specify a custom compare + function, otherwise `strcmp()` is used as the default function. diff --git a/Documentation/technical/api-submodule-config.txt b/Documentation/technical/api-submodule-config.txt new file mode 100644 index 0000000..941fa17 --- /dev/null +++ b/Documentation/technical/api-submodule-config.txt @@ -0,0 +1,62 @@ +submodule config cache API +========================== + +The submodule config cache API allows to read submodule +configurations/information from specified revisions. Internally +information is lazily read into a cache that is used to avoid +unnecessary parsing of the same .gitmodule files. Lookups can be done by +submodule path or name. + +Usage +----- + +To initialize the cache with configurations from the worktree the caller +typically first calls `gitmodules_config()` to read values from the +worktree .gitmodules and then to overlay the local git config values +`parse_submodule_config_option()` from the config parsing +infrastructure. + +The caller can look up information about submodules by using the +`submodule_from_path()` or `submodule_from_name()` functions. They return +a `struct submodule` which contains the values. The API automatically +initializes and allocates the needed infrastructure on-demand. If the +caller does only want to lookup values from revisions the initialization +can be skipped. + +If the internal cache might grow too big or when the caller is done with +the API, all internally cached values can be freed with submodule_free(). + +Data Structures +--------------- + +`struct submodule`:: + + This structure is used to return the information about one + submodule for a certain revision. It is returned by the lookup + functions. + +Functions +--------- + +`void submodule_free()`:: + + Use these to free the internally cached values. + +`int parse_submodule_config_option(const char *var, const char *value)`:: + + Can be passed to the config parsing infrastructure to parse + local (worktree) submodule configurations. + +`const struct submodule *submodule_from_path(const unsigned char *commit_sha1, const char *path)`:: + + Lookup values for one submodule by its commit_sha1 and path. + +`const struct submodule *submodule_from_name(const unsigned char *commit_sha1, const char *name)`:: + + The same as above but lookup by name. + +If given the null_sha1 as commit_sha1 the local configuration of a +submodule will be returned (e.g. consolidated values from local git +configuration and the .gitmodules file in the worktree). + +For an example usage see test-submodule-config.c. diff --git a/Documentation/technical/api-trace.txt b/Documentation/technical/api-trace.txt new file mode 100644 index 0000000..fadb597 --- /dev/null +++ b/Documentation/technical/api-trace.txt @@ -0,0 +1,140 @@ +trace API +========= + +The trace API can be used to print debug messages to stderr or a file. Trace +code is inactive unless explicitly enabled by setting `GIT_TRACE*` environment +variables. + +The trace implementation automatically adds `timestamp file:line ... \n` to +all trace messages. E.g.: + +------------ +23:59:59.123456 git.c:312 trace: built-in: git 'foo' +00:00:00.000001 builtin/foo.c:99 foo: some message +------------ + +Data Structures +--------------- + +`struct trace_key`:: + + Defines a trace key (or category). The default (for API functions that + don't take a key) is `GIT_TRACE`. ++ +E.g. to define a trace key controlled by environment variable `GIT_TRACE_FOO`: ++ +------------ +static struct trace_key trace_foo = TRACE_KEY_INIT(FOO); + +static void trace_print_foo(const char *message) +{ + trace_printf_key(&trace_foo, "%s", message); +} +------------ ++ +Note: don't use `const` as the trace implementation stores internal state in +the `trace_key` structure. + +Functions +--------- + +`int trace_want(struct trace_key *key)`:: + + Checks whether the trace key is enabled. Used to prevent expensive + string formatting before calling one of the printing APIs. + +`void trace_disable(struct trace_key *key)`:: + + Disables tracing for the specified key, even if the environment + variable was set. + +`void trace_printf(const char *format, ...)`:: +`void trace_printf_key(struct trace_key *key, const char *format, ...)`:: + + Prints a formatted message, similar to printf. + +`void trace_argv_printf(const char **argv, const char *format, ...)``:: + + Prints a formatted message, followed by a quoted list of arguments. + +`void trace_strbuf(struct trace_key *key, const struct strbuf *data)`:: + + Prints the strbuf, without additional formatting (i.e. doesn't + choke on `%` or even `\0`). + +`uint64_t getnanotime(void)`:: + + Returns nanoseconds since the epoch (01/01/1970), typically used + for performance measurements. ++ +Currently there are high precision timer implementations for Linux (using +`clock_gettime(CLOCK_MONOTONIC)`) and Windows (`QueryPerformanceCounter`). +Other platforms use `gettimeofday` as time source. + +`void trace_performance(uint64_t nanos, const char *format, ...)`:: +`void trace_performance_since(uint64_t start, const char *format, ...)`:: + + Prints the elapsed time (in nanoseconds), or elapsed time since + `start`, followed by a formatted message. Enabled via environment + variable `GIT_TRACE_PERFORMANCE`. Used for manual profiling, e.g.: ++ +------------ +uint64_t start = getnanotime(); +/* code section to measure */ +trace_performance_since(start, "foobar"); +------------ ++ +------------ +uint64_t t = 0; +for (;;) { + /* ignore */ + t -= getnanotime(); + /* code section to measure */ + t += getnanotime(); + /* ignore */ +} +trace_performance(t, "frotz"); +------------ + +Bugs & Caveats +-------------- + +GIT_TRACE_* environment variables can be used to tell Git to show +trace output to its standard error stream. Git can often spawn a pager +internally to run its subcommand and send its standard output and +standard error to it. + +Because GIT_TRACE_PERFORMANCE trace is generated only at the very end +of the program with atexit(), which happens after the pager exits, it +would not work well if you send its log to the standard error output +and let Git spawn the pager at the same time. + +As a work around, you can for example use '--no-pager', or set +GIT_TRACE_PERFORMANCE to another file descriptor which is redirected +to stderr, or set GIT_TRACE_PERFORMANCE to a file specified by its +absolute path. + +For example instead of the following command which by default may not +print any performance information: + +------------ +GIT_TRACE_PERFORMANCE=2 git log -1 +------------ + +you may want to use: + +------------ +GIT_TRACE_PERFORMANCE=2 git --no-pager log -1 +------------ + +or: + +------------ +GIT_TRACE_PERFORMANCE=3 3>&2 git log -1 +------------ + +or: + +------------ +GIT_TRACE_PERFORMANCE=/path/to/log/file git log -1 +------------ diff --git a/Documentation/technical/api-tree-walking.txt b/Documentation/technical/api-tree-walking.txt new file mode 100644 index 0000000..14af37c --- /dev/null +++ b/Documentation/technical/api-tree-walking.txt @@ -0,0 +1,147 @@ +tree walking API +================ + +The tree walking API is used to traverse and inspect trees. + +Data Structures +--------------- + +`struct name_entry`:: + + An entry in a tree. Each entry has a sha1 identifier, pathname, and + mode. + +`struct tree_desc`:: + + A semi-opaque data structure used to maintain the current state of the + walk. ++ +* `buffer` is a pointer into the memory representation of the tree. It always +points at the current entry being visited. + +* `size` counts the number of bytes left in the `buffer`. + +* `entry` points to the current entry being visited. + +`struct traverse_info`:: + + A structure used to maintain the state of a traversal. ++ +* `prev` points to the traverse_info which was used to descend into the +current tree. If this is the top-level tree `prev` will point to +a dummy traverse_info. + +* `name` is the entry for the current tree (if the tree is a subtree). + +* `pathlen` is the length of the full path for the current tree. + +* `conflicts` can be used by callbacks to maintain directory-file conflicts. + +* `fn` is a callback called for each entry in the tree. See Traversing for more +information. + +* `data` can be anything the `fn` callback would want to use. + +* `show_all_errors` tells whether to stop at the first error or not. + +Initializing +------------ + +`init_tree_desc`:: + + Initialize a `tree_desc` and decode its first entry. The buffer and + size parameters are assumed to be the same as the buffer and size + members of `struct tree`. + +`fill_tree_descriptor`:: + + Initialize a `tree_desc` and decode its first entry given the sha1 of + a tree. Returns the `buffer` member if the sha1 is a valid tree + identifier and NULL otherwise. + +`setup_traverse_info`:: + + Initialize a `traverse_info` given the pathname of the tree to start + traversing from. The `base` argument is assumed to be the `path` + member of the `name_entry` being recursed into unless the tree is a + top-level tree in which case the empty string ("") is used. + +Walking +------- + +`tree_entry`:: + + Visit the next entry in a tree. Returns 1 when there are more entries + left to visit and 0 when all entries have been visited. This is + commonly used in the test of a while loop. + +`tree_entry_len`:: + + Calculate the length of a tree entry's pathname. This utilizes the + memory structure of a tree entry to avoid the overhead of using a + generic strlen(). + +`update_tree_entry`:: + + Walk to the next entry in a tree. This is commonly used in conjunction + with `tree_entry_extract` to inspect the current entry. + +`tree_entry_extract`:: + + Decode the entry currently being visited (the one pointed to by + `tree_desc's` `entry` member) and return the sha1 of the entry. The + `pathp` and `modep` arguments are set to the entry's pathname and mode + respectively. + +`get_tree_entry`:: + + Find an entry in a tree given a pathname and the sha1 of a tree to + search. Returns 0 if the entry is found and -1 otherwise. The third + and fourth parameters are set to the entry's sha1 and mode + respectively. + +Traversing +---------- + +`traverse_trees`:: + + Traverse `n` number of trees in parallel. The `fn` callback member of + `traverse_info` is called once for each tree entry. + +`traverse_callback_t`:: + The arguments passed to the traverse callback are as follows: ++ +* `n` counts the number of trees being traversed. + +* `mask` has its nth bit set if something exists in the nth entry. + +* `dirmask` has its nth bit set if the nth tree's entry is a directory. + +* `entry` is an array of size `n` where the nth entry is from the nth tree. + +* `info` maintains the state of the traversal. + ++ +Returning a negative value will terminate the traversal. Otherwise the +return value is treated as an update mask. If the nth bit is set the nth tree +will be updated and if the bit is not set the nth tree entry will be the +same in the next callback invocation. + +`make_traverse_path`:: + + Generate the full pathname of a tree entry based from the root of the + traversal. For example, if the traversal has recursed into another + tree named "bar" the pathname of an entry "baz" in the "bar" + tree would be "bar/baz". + +`traverse_path_len`:: + + Calculate the length of a pathname returned by `make_traverse_path`. + This utilizes the memory structure of a tree entry to avoid the + overhead of using a generic strlen(). + +Authors +------- + +Written by Junio C Hamano <gitster@pobox.com> and Linus Torvalds +<torvalds@linux-foundation.org> diff --git a/Documentation/technical/api-xdiff-interface.txt b/Documentation/technical/api-xdiff-interface.txt new file mode 100644 index 0000000..6296eca --- /dev/null +++ b/Documentation/technical/api-xdiff-interface.txt @@ -0,0 +1,7 @@ +xdiff interface API +=================== + +Talk about our calling convention to xdiff library, including +xdiff_emit_consume_fn. + +(Dscho, JC) diff --git a/Documentation/technical/bitmap-format.txt b/Documentation/technical/bitmap-format.txt new file mode 100644 index 0000000..f8c18a0 --- /dev/null +++ b/Documentation/technical/bitmap-format.txt @@ -0,0 +1,164 @@ +GIT bitmap v1 format +==================== + + - A header appears at the beginning: + + 4-byte signature: {'B', 'I', 'T', 'M'} + + 2-byte version number (network byte order) + The current implementation only supports version 1 + of the bitmap index (the same one as JGit). + + 2-byte flags (network byte order) + + The following flags are supported: + + - BITMAP_OPT_FULL_DAG (0x1) REQUIRED + This flag must always be present. It implies that the bitmap + index has been generated for a packfile with full closure + (i.e. where every single object in the packfile can find + its parent links inside the same packfile). This is a + requirement for the bitmap index format, also present in JGit, + that greatly reduces the complexity of the implementation. + + - BITMAP_OPT_HASH_CACHE (0x4) + If present, the end of the bitmap file contains + `N` 32-bit name-hash values, one per object in the + pack. The format and meaning of the name-hash is + described below. + + 4-byte entry count (network byte order) + + The total count of entries (bitmapped commits) in this bitmap index. + + 20-byte checksum + + The SHA1 checksum of the pack this bitmap index belongs to. + + - 4 EWAH bitmaps that act as type indexes + + Type indexes are serialized after the hash cache in the shape + of four EWAH bitmaps stored consecutively (see Appendix A for + the serialization format of an EWAH bitmap). + + There is a bitmap for each Git object type, stored in the following + order: + + - Commits + - Trees + - Blobs + - Tags + + In each bitmap, the `n`th bit is set to true if the `n`th object + in the packfile is of that type. + + The obvious consequence is that the OR of all 4 bitmaps will result + in a full set (all bits set), and the AND of all 4 bitmaps will + result in an empty bitmap (no bits set). + + - N entries with compressed bitmaps, one for each indexed commit + + Where `N` is the total amount of entries in this bitmap index. + Each entry contains the following: + + - 4-byte object position (network byte order) + The position **in the index for the packfile** where the + bitmap for this commit is found. + + - 1-byte XOR-offset + The xor offset used to compress this bitmap. For an entry + in position `x`, a XOR offset of `y` means that the actual + bitmap representing this commit is composed by XORing the + bitmap for this entry with the bitmap in entry `x-y` (i.e. + the bitmap `y` entries before this one). + + Note that this compression can be recursive. In order to + XOR this entry with a previous one, the previous entry needs + to be decompressed first, and so on. + + The hard-limit for this offset is 160 (an entry can only be + xor'ed against one of the 160 entries preceding it). This + number is always positive, and hence entries are always xor'ed + with **previous** bitmaps, not bitmaps that will come afterwards + in the index. + + - 1-byte flags for this bitmap + At the moment the only available flag is `0x1`, which hints + that this bitmap can be re-used when rebuilding bitmap indexes + for the repository. + + - The compressed bitmap itself, see Appendix A. + +== Appendix A: Serialization format for an EWAH bitmap + +Ewah bitmaps are serialized in the same protocol as the JAVAEWAH +library, making them backwards compatible with the JGit +implementation: + + - 4-byte number of bits of the resulting UNCOMPRESSED bitmap + + - 4-byte number of words of the COMPRESSED bitmap, when stored + + - N x 8-byte words, as specified by the previous field + + This is the actual content of the compressed bitmap. + + - 4-byte position of the current RLW for the compressed + bitmap + +All words are stored in network byte order for their corresponding +sizes. + +The compressed bitmap is stored in a form of run-length encoding, as +follows. It consists of a concatenation of an arbitrary number of +chunks. Each chunk consists of one or more 64-bit words + + H L_1 L_2 L_3 .... L_M + +H is called RLW (run length word). It consists of (from lower to higher +order bits): + + - 1 bit: the repeated bit B + + - 32 bits: repetition count K (unsigned) + + - 31 bits: literal word count M (unsigned) + +The bitstream represented by the above chunk is then: + + - K repetitions of B + + - The bits stored in `L_1` through `L_M`. Within a word, bits at + lower order come earlier in the stream than those at higher + order. + +The next word after `L_M` (if any) must again be a RLW, for the next +chunk. For efficient appending to the bitstream, the EWAH stores a +pointer to the last RLW in the stream. + + +== Appendix B: Optional Bitmap Sections + +These sections may or may not be present in the `.bitmap` file; their +presence is indicated by the header flags section described above. + +Name-hash cache +--------------- + +If the BITMAP_OPT_HASH_CACHE flag is set, the end of the bitmap contains +a cache of 32-bit values, one per object in the pack. The value at +position `i` is the hash of the pathname at which the `i`th object +(counting in index order) in the pack can be found. This can be fed +into the delta heuristics to compare objects with similar pathnames. + +The hash algorithm used is: + + hash = 0; + while ((c = *name++)) + if (!isspace(c)) + hash = (hash >> 2) + (c << 24); + +Note that this hashing scheme is tied to the BITMAP_OPT_HASH_CACHE flag. +If implementations want to choose a different hashing scheme, they are +free to do so, but MUST allocate a new header flag (because comparing +hashes made under two different schemes would be pointless). diff --git a/Documentation/technical/http-protocol.txt b/Documentation/technical/http-protocol.txt new file mode 100644 index 0000000..1c561bd --- /dev/null +++ b/Documentation/technical/http-protocol.txt @@ -0,0 +1,507 @@ +HTTP transfer protocols +======================= + +Git supports two HTTP based transfer protocols. A "dumb" protocol +which requires only a standard HTTP server on the server end of the +connection, and a "smart" protocol which requires a Git aware CGI +(or server module). This document describes both protocols. + +As a design feature smart clients can automatically upgrade "dumb" +protocol URLs to smart URLs. This permits all users to have the +same published URL, and the peers automatically select the most +efficient transport available to them. + + +URL Format +---------- + +URLs for Git repositories accessed by HTTP use the standard HTTP +URL syntax documented by RFC 1738, so they are of the form: + + http://<host>:<port>/<path>?<searchpart> + +Within this documentation the placeholder `$GIT_URL` will stand for +the http:// repository URL entered by the end-user. + +Servers SHOULD handle all requests to locations matching `$GIT_URL`, as +both the "smart" and "dumb" HTTP protocols used by Git operate +by appending additional path components onto the end of the user +supplied `$GIT_URL` string. + +An example of a dumb client requesting for a loose object: + + $GIT_URL: http://example.com:8080/git/repo.git + URL request: http://example.com:8080/git/repo.git/objects/d0/49f6c27a2244e12041955e262a404c7faba355 + +An example of a smart request to a catch-all gateway: + + $GIT_URL: http://example.com/daemon.cgi?svc=git&q= + URL request: http://example.com/daemon.cgi?svc=git&q=/info/refs&service=git-receive-pack + +An example of a request to a submodule: + + $GIT_URL: http://example.com/git/repo.git/path/submodule.git + URL request: http://example.com/git/repo.git/path/submodule.git/info/refs + +Clients MUST strip a trailing `/`, if present, from the user supplied +`$GIT_URL` string to prevent empty path tokens (`//`) from appearing +in any URL sent to a server. Compatible clients MUST expand +`$GIT_URL/info/refs` as `foo/info/refs` and not `foo//info/refs`. + + +Authentication +-------------- + +Standard HTTP authentication is used if authentication is required +to access a repository, and MAY be configured and enforced by the +HTTP server software. + +Because Git repositories are accessed by standard path components +server administrators MAY use directory based permissions within +their HTTP server to control repository access. + +Clients SHOULD support Basic authentication as described by RFC 2617. +Servers SHOULD support Basic authentication by relying upon the +HTTP server placed in front of the Git server software. + +Servers SHOULD NOT require HTTP cookies for the purposes of +authentication or access control. + +Clients and servers MAY support other common forms of HTTP based +authentication, such as Digest authentication. + + +SSL +--- + +Clients and servers SHOULD support SSL, particularly to protect +passwords when relying on Basic HTTP authentication. + + +Session State +------------- + +The Git over HTTP protocol (much like HTTP itself) is stateless +from the perspective of the HTTP server side. All state MUST be +retained and managed by the client process. This permits simple +round-robin load-balancing on the server side, without needing to +worry about state management. + +Clients MUST NOT require state management on the server side in +order to function correctly. + +Servers MUST NOT require HTTP cookies in order to function correctly. +Clients MAY store and forward HTTP cookies during request processing +as described by RFC 2616 (HTTP/1.1). Servers SHOULD ignore any +cookies sent by a client. + + +General Request Processing +-------------------------- + +Except where noted, all standard HTTP behavior SHOULD be assumed +by both client and server. This includes (but is not necessarily +limited to): + +If there is no repository at `$GIT_URL`, or the resource pointed to by a +location matching `$GIT_URL` does not exist, the server MUST NOT respond +with `200 OK` response. A server SHOULD respond with +`404 Not Found`, `410 Gone`, or any other suitable HTTP status code +which does not imply the resource exists as requested. + +If there is a repository at `$GIT_URL`, but access is not currently +permitted, the server MUST respond with the `403 Forbidden` HTTP +status code. + +Servers SHOULD support both HTTP 1.0 and HTTP 1.1. +Servers SHOULD support chunked encoding for both request and response +bodies. + +Clients SHOULD support both HTTP 1.0 and HTTP 1.1. +Clients SHOULD support chunked encoding for both request and response +bodies. + +Servers MAY return ETag and/or Last-Modified headers. + +Clients MAY revalidate cached entities by including If-Modified-Since +and/or If-None-Match request headers. + +Servers MAY return `304 Not Modified` if the relevant headers appear +in the request and the entity has not changed. Clients MUST treat +`304 Not Modified` identical to `200 OK` by reusing the cached entity. + +Clients MAY reuse a cached entity without revalidation if the +Cache-Control and/or Expires header permits caching. Clients and +servers MUST follow RFC 2616 for cache controls. + + +Discovering References +---------------------- + +All HTTP clients MUST begin either a fetch or a push exchange by +discovering the references available on the remote repository. + +Dumb Clients +~~~~~~~~~~~~ + +HTTP clients that only support the "dumb" protocol MUST discover +references by making a request for the special info/refs file of +the repository. + +Dumb HTTP clients MUST make a `GET` request to `$GIT_URL/info/refs`, +without any search/query parameters. + + C: GET $GIT_URL/info/refs HTTP/1.0 + + S: 200 OK + S: + S: 95dcfa3633004da0049d3d0fa03f80589cbcaf31 refs/heads/maint + S: d049f6c27a2244e12041955e262a404c7faba355 refs/heads/master + S: 2cb58b79488a98d2721cea644875a8dd0026b115 refs/tags/v1.0 + S: a3c2e2402b99163d1d59756e5f207ae21cccba4c refs/tags/v1.0^{} + +The Content-Type of the returned info/refs entity SHOULD be +`text/plain; charset=utf-8`, but MAY be any content type. +Clients MUST NOT attempt to validate the returned Content-Type. +Dumb servers MUST NOT return a return type starting with +`application/x-git-`. + +Cache-Control headers MAY be returned to disable caching of the +returned entity. + +When examining the response clients SHOULD only examine the HTTP +status code. Valid responses are `200 OK`, or `304 Not Modified`. + +The returned content is a UNIX formatted text file describing +each ref and its known value. The file SHOULD be sorted by name +according to the C locale ordering. The file SHOULD NOT include +the default ref named `HEAD`. + + info_refs = *( ref_record ) + ref_record = any_ref / peeled_ref + + any_ref = obj-id HTAB refname LF + peeled_ref = obj-id HTAB refname LF + obj-id HTAB refname "^{}" LF + +Smart Clients +~~~~~~~~~~~~~ + +HTTP clients that support the "smart" protocol (or both the +"smart" and "dumb" protocols) MUST discover references by making +a parameterized request for the info/refs file of the repository. + +The request MUST contain exactly one query parameter, +`service=$servicename`, where `$servicename` MUST be the service +name the client wishes to contact to complete the operation. +The request MUST NOT contain additional query parameters. + + C: GET $GIT_URL/info/refs?service=git-upload-pack HTTP/1.0 + +dumb server reply: + + S: 200 OK + S: + S: 95dcfa3633004da0049d3d0fa03f80589cbcaf31 refs/heads/maint + S: d049f6c27a2244e12041955e262a404c7faba355 refs/heads/master + S: 2cb58b79488a98d2721cea644875a8dd0026b115 refs/tags/v1.0 + S: a3c2e2402b99163d1d59756e5f207ae21cccba4c refs/tags/v1.0^{} + +smart server reply: + + S: 200 OK + S: Content-Type: application/x-git-upload-pack-advertisement + S: Cache-Control: no-cache + S: + S: 001e# service=git-upload-pack\n + S: 004895dcfa3633004da0049d3d0fa03f80589cbcaf31 refs/heads/maint\0multi_ack\n + S: 0042d049f6c27a2244e12041955e262a404c7faba355 refs/heads/master\n + S: 003c2cb58b79488a98d2721cea644875a8dd0026b115 refs/tags/v1.0\n + S: 003fa3c2e2402b99163d1d59756e5f207ae21cccba4c refs/tags/v1.0^{}\n + +Dumb Server Response +^^^^^^^^^^^^^^^^^^^^ +Dumb servers MUST respond with the dumb server reply format. + +See the prior section under dumb clients for a more detailed +description of the dumb server response. + +Smart Server Response +^^^^^^^^^^^^^^^^^^^^^ +If the server does not recognize the requested service name, or the +requested service name has been disabled by the server administrator, +the server MUST respond with the `403 Forbidden` HTTP status code. + +Otherwise, smart servers MUST respond with the smart server reply +format for the requested service name. + +Cache-Control headers SHOULD be used to disable caching of the +returned entity. + +The Content-Type MUST be `application/x-$servicename-advertisement`. +Clients SHOULD fall back to the dumb protocol if another content +type is returned. When falling back to the dumb protocol clients +SHOULD NOT make an additional request to `$GIT_URL/info/refs`, but +instead SHOULD use the response already in hand. Clients MUST NOT +continue if they do not support the dumb protocol. + +Clients MUST validate the status code is either `200 OK` or +`304 Not Modified`. + +Clients MUST validate the first five bytes of the response entity +matches the regex `^[0-9a-f]{4}#`. If this test fails, clients +MUST NOT continue. + +Clients MUST parse the entire response as a sequence of pkt-line +records. + +Clients MUST verify the first pkt-line is `# service=$servicename`. +Servers MUST set $servicename to be the request parameter value. +Servers SHOULD include an LF at the end of this line. +Clients MUST ignore an LF at the end of the line. + +Servers MUST terminate the response with the magic `0000` end +pkt-line marker. + +The returned response is a pkt-line stream describing each ref and +its known value. The stream SHOULD be sorted by name according to +the C locale ordering. The stream SHOULD include the default ref +named `HEAD` as the first ref. The stream MUST include capability +declarations behind a NUL on the first ref. + + smart_reply = PKT-LINE("# service=$servicename" LF) + ref_list + "0000" + ref_list = empty_list / non_empty_list + + empty_list = PKT-LINE(zero-id SP "capabilities^{}" NUL cap-list LF) + + non_empty_list = PKT-LINE(obj-id SP name NUL cap_list LF) + *ref_record + + cap-list = capability *(SP capability) + capability = 1*(LC_ALPHA / DIGIT / "-" / "_") + LC_ALPHA = %x61-7A + + ref_record = any_ref / peeled_ref + any_ref = PKT-LINE(obj-id SP name LF) + peeled_ref = PKT-LINE(obj-id SP name LF) + PKT-LINE(obj-id SP name "^{}" LF + + +Smart Service git-upload-pack +------------------------------ +This service reads from the repository pointed to by `$GIT_URL`. + +Clients MUST first perform ref discovery with +`$GIT_URL/info/refs?service=git-upload-pack`. + + C: POST $GIT_URL/git-upload-pack HTTP/1.0 + C: Content-Type: application/x-git-upload-pack-request + C: + C: 0032want 0a53e9ddeaddad63ad106860237bbf53411d11a7\n + C: 0032have 441b40d833fdfa93eb2908e52742248faf0ee993\n + C: 0000 + + S: 200 OK + S: Content-Type: application/x-git-upload-pack-result + S: Cache-Control: no-cache + S: + S: ....ACK %s, continue + S: ....NAK + +Clients MUST NOT reuse or revalidate a cached response. +Servers MUST include sufficient Cache-Control headers +to prevent caching of the response. + +Servers SHOULD support all capabilities defined here. + +Clients MUST send at least one "want" command in the request body. +Clients MUST NOT reference an id in a "want" command which did not +appear in the response obtained through ref discovery unless the +server advertises capability `allow-tip-sha1-in-want` or +`allow-reachable-sha1-in-want`. + + compute_request = want_list + have_list + request_end + request_end = "0000" / "done" + + want_list = PKT-LINE(want NUL cap_list LF) + *(want_pkt) + want_pkt = PKT-LINE(want LF) + want = "want" SP id + cap_list = *(SP capability) SP + + have_list = *PKT-LINE("have" SP id LF) + +TODO: Document this further. + +The Negotiation Algorithm +~~~~~~~~~~~~~~~~~~~~~~~~~ +The computation to select the minimal pack proceeds as follows +(C = client, S = server): + +'init step:' + +C: Use ref discovery to obtain the advertised refs. + +C: Place any object seen into set `advertised`. + +C: Build an empty set, `common`, to hold the objects that are later + determined to be on both ends. + +C: Build a set, `want`, of the objects from `advertised` the client + wants to fetch, based on what it saw during ref discovery. + +C: Start a queue, `c_pending`, ordered by commit time (popping newest + first). Add all client refs. When a commit is popped from + the queue its parents SHOULD be automatically inserted back. + Commits MUST only enter the queue once. + +'one compute step:' + +C: Send one `$GIT_URL/git-upload-pack` request: + + C: 0032want <want #1>............................... + C: 0032want <want #2>............................... + .... + C: 0032have <common #1>............................. + C: 0032have <common #2>............................. + .... + C: 0032have <have #1>............................... + C: 0032have <have #2>............................... + .... + C: 0000 + +The stream is organized into "commands", with each command +appearing by itself in a pkt-line. Within a command line, +the text leading up to the first space is the command name, +and the remainder of the line to the first LF is the value. +Command lines are terminated with an LF as the last byte of +the pkt-line value. + +Commands MUST appear in the following order, if they appear +at all in the request stream: + +* "want" +* "have" + +The stream is terminated by a pkt-line flush (`0000`). + +A single "want" or "have" command MUST have one hex formatted +SHA-1 as its value. Multiple SHA-1s MUST be sent by sending +multiple commands. + +The `have` list is created by popping the first 32 commits +from `c_pending`. Less can be supplied if `c_pending` empties. + +If the client has sent 256 "have" commits and has not yet +received one of those back from `s_common`, or the client has +emptied `c_pending` it SHOULD include a "done" command to let +the server know it won't proceed: + + C: 0009done + +S: Parse the git-upload-pack request: + +Verify all objects in `want` are directly reachable from refs. + +The server MAY walk backwards through history or through +the reflog to permit slightly stale requests. + +If no "want" objects are received, send an error: +TODO: Define error if no "want" lines are requested. + +If any "want" object is not reachable, send an error: +TODO: Define error if an invalid "want" is requested. + +Create an empty list, `s_common`. + +If "have" was sent: + +Loop through the objects in the order supplied by the client. + +For each object, if the server has the object reachable from +a ref, add it to `s_common`. If a commit is added to `s_common`, +do not add any ancestors, even if they also appear in `have`. + +S: Send the git-upload-pack response: + +If the server has found a closed set of objects to pack or the +request ends with "done", it replies with the pack. +TODO: Document the pack based response + + S: PACK... + +The returned stream is the side-band-64k protocol supported +by the git-upload-pack service, and the pack is embedded into +stream 1. Progress messages from the server side MAY appear +in stream 2. + +Here a "closed set of objects" is defined to have at least +one path from every "want" to at least one "common" object. + +If the server needs more information, it replies with a +status continue response: +TODO: Document the non-pack response + +C: Parse the upload-pack response: + TODO: Document parsing response + +'Do another compute step.' + + +Smart Service git-receive-pack +------------------------------ +This service reads from the repository pointed to by `$GIT_URL`. + +Clients MUST first perform ref discovery with +`$GIT_URL/info/refs?service=git-receive-pack`. + + C: POST $GIT_URL/git-receive-pack HTTP/1.0 + C: Content-Type: application/x-git-receive-pack-request + C: + C: ....0a53e9ddeaddad63ad106860237bbf53411d11a7 441b40d833fdfa93eb2908e52742248faf0ee993 refs/heads/maint\0 report-status + C: 0000 + C: PACK.... + + S: 200 OK + S: Content-Type: application/x-git-receive-pack-result + S: Cache-Control: no-cache + S: + S: .... + +Clients MUST NOT reuse or revalidate a cached response. +Servers MUST include sufficient Cache-Control headers +to prevent caching of the response. + +Servers SHOULD support all capabilities defined here. + +Clients MUST send at least one command in the request body. +Within the command portion of the request body clients SHOULD send +the id obtained through ref discovery as old_id. + + update_request = command_list + "PACK" <binary data> + + command_list = PKT-LINE(command NUL cap_list LF) + *(command_pkt) + command_pkt = PKT-LINE(command LF) + cap_list = *(SP capability) SP + + command = create / delete / update + create = zero-id SP new_id SP name + delete = old_id SP zero-id SP name + update = old_id SP new_id SP name + +TODO: Document this further. + + +References +---------- + +http://www.ietf.org/rfc/rfc1738.txt[RFC 1738: Uniform Resource Locators (URL)] +http://www.ietf.org/rfc/rfc2616.txt[RFC 2616: Hypertext Transfer Protocol -- HTTP/1.1] +link:technical/pack-protocol.html +link:technical/protocol-capabilities.html diff --git a/Documentation/technical/index-format.txt b/Documentation/technical/index-format.txt new file mode 100644 index 0000000..ade0b0c --- /dev/null +++ b/Documentation/technical/index-format.txt @@ -0,0 +1,297 @@ +Git index format +================ + +== The Git index file has the following format + + All binary numbers are in network byte order. Version 2 is described + here unless stated otherwise. + + - A 12-byte header consisting of + + 4-byte signature: + The signature is { 'D', 'I', 'R', 'C' } (stands for "dircache") + + 4-byte version number: + The current supported versions are 2, 3 and 4. + + 32-bit number of index entries. + + - A number of sorted index entries (see below). + + - Extensions + + Extensions are identified by signature. Optional extensions can + be ignored if Git does not understand them. + + Git currently supports cached tree and resolve undo extensions. + + 4-byte extension signature. If the first byte is 'A'..'Z' the + extension is optional and can be ignored. + + 32-bit size of the extension + + Extension data + + - 160-bit SHA-1 over the content of the index file before this + checksum. + +== Index entry + + Index entries are sorted in ascending order on the name field, + interpreted as a string of unsigned bytes (i.e. memcmp() order, no + localization, no special casing of directory separator '/'). Entries + with the same name are sorted by their stage field. + + 32-bit ctime seconds, the last time a file's metadata changed + this is stat(2) data + + 32-bit ctime nanosecond fractions + this is stat(2) data + + 32-bit mtime seconds, the last time a file's data changed + this is stat(2) data + + 32-bit mtime nanosecond fractions + this is stat(2) data + + 32-bit dev + this is stat(2) data + + 32-bit ino + this is stat(2) data + + 32-bit mode, split into (high to low bits) + + 4-bit object type + valid values in binary are 1000 (regular file), 1010 (symbolic link) + and 1110 (gitlink) + + 3-bit unused + + 9-bit unix permission. Only 0755 and 0644 are valid for regular files. + Symbolic links and gitlinks have value 0 in this field. + + 32-bit uid + this is stat(2) data + + 32-bit gid + this is stat(2) data + + 32-bit file size + This is the on-disk size from stat(2), truncated to 32-bit. + + 160-bit SHA-1 for the represented object + + A 16-bit 'flags' field split into (high to low bits) + + 1-bit assume-valid flag + + 1-bit extended flag (must be zero in version 2) + + 2-bit stage (during merge) + + 12-bit name length if the length is less than 0xFFF; otherwise 0xFFF + is stored in this field. + + (Version 3 or later) A 16-bit field, only applicable if the + "extended flag" above is 1, split into (high to low bits). + + 1-bit reserved for future + + 1-bit skip-worktree flag (used by sparse checkout) + + 1-bit intent-to-add flag (used by "git add -N") + + 13-bit unused, must be zero + + Entry path name (variable length) relative to top level directory + (without leading slash). '/' is used as path separator. The special + path components ".", ".." and ".git" (without quotes) are disallowed. + Trailing slash is also disallowed. + + The exact encoding is undefined, but the '.' and '/' characters + are encoded in 7-bit ASCII and the encoding cannot contain a NUL + byte (iow, this is a UNIX pathname). + + (Version 4) In version 4, the entry path name is prefix-compressed + relative to the path name for the previous entry (the very first + entry is encoded as if the path name for the previous entry is an + empty string). At the beginning of an entry, an integer N in the + variable width encoding (the same encoding as the offset is encoded + for OFS_DELTA pack entries; see pack-format.txt) is stored, followed + by a NUL-terminated string S. Removing N bytes from the end of the + path name for the previous entry, and replacing it with the string S + yields the path name for this entry. + + 1-8 nul bytes as necessary to pad the entry to a multiple of eight bytes + while keeping the name NUL-terminated. + + (Version 4) In version 4, the padding after the pathname does not + exist. + + Interpretation of index entries in split index mode is completely + different. See below for details. + +== Extensions + +=== Cached tree + + Cached tree extension contains pre-computed hashes for trees that can + be derived from the index. It helps speed up tree object generation + from index for a new commit. + + When a path is updated in index, the path must be invalidated and + removed from tree cache. + + The signature for this extension is { 'T', 'R', 'E', 'E' }. + + A series of entries fill the entire extension; each of which + consists of: + + - NUL-terminated path component (relative to its parent directory); + + - ASCII decimal number of entries in the index that is covered by the + tree this entry represents (entry_count); + + - A space (ASCII 32); + + - ASCII decimal number that represents the number of subtrees this + tree has; + + - A newline (ASCII 10); and + + - 160-bit object name for the object that would result from writing + this span of index as a tree. + + An entry can be in an invalidated state and is represented by having + a negative number in the entry_count field. In this case, there is no + object name and the next entry starts immediately after the newline. + When writing an invalid entry, -1 should always be used as entry_count. + + The entries are written out in the top-down, depth-first order. The + first entry represents the root level of the repository, followed by the + first subtree--let's call this A--of the root level (with its name + relative to the root level), followed by the first subtree of A (with + its name relative to A), ... + +=== Resolve undo + + A conflict is represented in the index as a set of higher stage entries. + When a conflict is resolved (e.g. with "git add path"), these higher + stage entries will be removed and a stage-0 entry with proper resolution + is added. + + When these higher stage entries are removed, they are saved in the + resolve undo extension, so that conflicts can be recreated (e.g. with + "git checkout -m"), in case users want to redo a conflict resolution + from scratch. + + The signature for this extension is { 'R', 'E', 'U', 'C' }. + + A series of entries fill the entire extension; each of which + consists of: + + - NUL-terminated pathname the entry describes (relative to the root of + the repository, i.e. full pathname); + + - Three NUL-terminated ASCII octal numbers, entry mode of entries in + stage 1 to 3 (a missing stage is represented by "0" in this field); + and + + - At most three 160-bit object names of the entry in stages from 1 to 3 + (nothing is written for a missing stage). + +=== Split index + + In split index mode, the majority of index entries could be stored + in a separate file. This extension records the changes to be made on + top of that to produce the final index. + + The signature for this extension is { 'l', 'i', 'n', 'k' }. + + The extension consists of: + + - 160-bit SHA-1 of the shared index file. The shared index file path + is $GIT_DIR/sharedindex.<SHA-1>. If all 160 bits are zero, the + index does not require a shared index file. + + - An ewah-encoded delete bitmap, each bit represents an entry in the + shared index. If a bit is set, its corresponding entry in the + shared index will be removed from the final index. Note, because + a delete operation changes index entry positions, but we do need + original positions in replace phase, it's best to just mark + entries for removal, then do a mass deletion after replacement. + + - An ewah-encoded replace bitmap, each bit represents an entry in + the shared index. If a bit is set, its corresponding entry in the + shared index will be replaced with an entry in this index + file. All replaced entries are stored in sorted order in this + index. The first "1" bit in the replace bitmap corresponds to the + first index entry, the second "1" bit to the second entry and so + on. Replaced entries may have empty path names to save space. + + The remaining index entries after replaced ones will be added to the + final index. These added entries are also sorted by entry name then + stage. + +== Untracked cache + + Untracked cache saves the untracked file list and necessary data to + verify the cache. The signature for this extension is { 'U', 'N', + 'T', 'R' }. + + The extension starts with + + - A sequence of NUL-terminated strings, preceded by the size of the + sequence in variable width encoding. Each string describes the + environment where the cache can be used. + + - Stat data of $GIT_DIR/info/exclude. See "Index entry" section from + ctime field until "file size". + + - Stat data of core.excludesfile + + - 32-bit dir_flags (see struct dir_struct) + + - 160-bit SHA-1 of $GIT_DIR/info/exclude. Null SHA-1 means the file + does not exist. + + - 160-bit SHA-1 of core.excludesfile. Null SHA-1 means the file does + not exist. + + - NUL-terminated string of per-dir exclude file name. This usually + is ".gitignore". + + - The number of following directory blocks, variable width + encoding. If this number is zero, the extension ends here with a + following NUL. + + - A number of directory blocks in depth-first-search order, each + consists of + + - The number of untracked entries, variable width encoding. + + - The number of sub-directory blocks, variable width encoding. + + - The directory name terminated by NUL. + + - A number of untracked file/dir names terminated by NUL. + +The remaining data of each directory block is grouped by type: + + - An ewah bitmap, the n-th bit marks whether the n-th directory has + valid untracked cache entries. + + - An ewah bitmap, the n-th bit records "check-only" bit of + read_directory_recursive() for the n-th directory. + + - An ewah bitmap, the n-th bit indicates whether SHA-1 and stat data + is valid for the n-th directory and exists in the next data. + + - An array of stat data. The n-th data corresponds with the n-th + "one" bit in the previous ewah bitmap. + + - An array of SHA-1. The n-th SHA-1 corresponds with the n-th "one" bit + in the previous ewah bitmap. + + - One NUL. diff --git a/Documentation/technical/pack-format.txt b/Documentation/technical/pack-format.txt new file mode 100644 index 0000000..8e5bf60 --- /dev/null +++ b/Documentation/technical/pack-format.txt @@ -0,0 +1,162 @@ +Git pack format +=============== + +== pack-*.pack files have the following format: + + - A header appears at the beginning and consists of the following: + + 4-byte signature: + The signature is: {'P', 'A', 'C', 'K'} + + 4-byte version number (network byte order): + Git currently accepts version number 2 or 3 but + generates version 2 only. + + 4-byte number of objects contained in the pack (network byte order) + + Observation: we cannot have more than 4G versions ;-) and + more than 4G objects in a pack. + + - The header is followed by number of object entries, each of + which looks like this: + + (undeltified representation) + n-byte type and length (3-bit type, (n-1)*7+4-bit length) + compressed data + + (deltified representation) + n-byte type and length (3-bit type, (n-1)*7+4-bit length) + 20-byte base object name if OBJ_REF_DELTA or a negative relative + offset from the delta object's position in the pack if this + is an OBJ_OFS_DELTA object + compressed delta data + + Observation: length of each object is encoded in a variable + length format and is not constrained to 32-bit or anything. + + - The trailer records 20-byte SHA-1 checksum of all of the above. + +== Original (version 1) pack-*.idx files have the following format: + + - The header consists of 256 4-byte network byte order + integers. N-th entry of this table records the number of + objects in the corresponding pack, the first byte of whose + object name is less than or equal to N. This is called the + 'first-level fan-out' table. + + - The header is followed by sorted 24-byte entries, one entry + per object in the pack. Each entry is: + + 4-byte network byte order integer, recording where the + object is stored in the packfile as the offset from the + beginning. + + 20-byte object name. + + - The file is concluded with a trailer: + + A copy of the 20-byte SHA-1 checksum at the end of + corresponding packfile. + + 20-byte SHA-1-checksum of all of the above. + +Pack Idx file: + + -- +--------------------------------+ +fanout | fanout[0] = 2 (for example) |-. +table +--------------------------------+ | + | fanout[1] | | + +--------------------------------+ | + | fanout[2] | | + ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ | + | fanout[255] = total objects |---. + -- +--------------------------------+ | | +main | offset | | | +index | object name 00XXXXXXXXXXXXXXXX | | | +table +--------------------------------+ | | + | offset | | | + | object name 00XXXXXXXXXXXXXXXX | | | + +--------------------------------+<+ | + .-| offset | | + | | object name 01XXXXXXXXXXXXXXXX | | + | +--------------------------------+ | + | | offset | | + | | object name 01XXXXXXXXXXXXXXXX | | + | ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ | + | | offset | | + | | object name FFXXXXXXXXXXXXXXXX | | + --| +--------------------------------+<--+ +trailer | | packfile checksum | + | +--------------------------------+ + | | idxfile checksum | + | +--------------------------------+ + .-------. + | +Pack file entry: <+ + + packed object header: + 1-byte size extension bit (MSB) + type (next 3 bit) + size0 (lower 4-bit) + n-byte sizeN (as long as MSB is set, each 7-bit) + size0..sizeN form 4+7+7+..+7 bit integer, size0 + is the least significant part, and sizeN is the + most significant part. + packed object data: + If it is not DELTA, then deflated bytes (the size above + is the size before compression). + If it is REF_DELTA, then + 20-byte base object name SHA-1 (the size above is the + size of the delta data that follows). + delta data, deflated. + If it is OFS_DELTA, then + n-byte offset (see below) interpreted as a negative + offset from the type-byte of the header of the + ofs-delta entry (the size above is the size of + the delta data that follows). + delta data, deflated. + + offset encoding: + n bytes with MSB set in all but the last one. + The offset is then the number constructed by + concatenating the lower 7 bit of each byte, and + for n >= 2 adding 2^7 + 2^14 + ... + 2^(7*(n-1)) + to the result. + + + +== Version 2 pack-*.idx files support packs larger than 4 GiB, and + have some other reorganizations. They have the format: + + - A 4-byte magic number '\377tOc' which is an unreasonable + fanout[0] value. + + - A 4-byte version number (= 2) + + - A 256-entry fan-out table just like v1. + + - A table of sorted 20-byte SHA-1 object names. These are + packed together without offset values to reduce the cache + footprint of the binary search for a specific object name. + + - A table of 4-byte CRC32 values of the packed object data. + This is new in v2 so compressed data can be copied directly + from pack to pack during repacking without undetected + data corruption. + + - A table of 4-byte offset values (in network byte order). + These are usually 31-bit pack file offsets, but large + offsets are encoded as an index into the next table with + the msbit set. + + - A table of 8-byte offset entries (empty for pack files less + than 2 GiB). Pack files are organized with heavily used + objects toward the front, so most object references should + not need to refer to this table. + + - The same trailer as a v1 pack file: + + A copy of the 20-byte SHA-1 checksum at the end of + corresponding packfile. + + 20-byte SHA-1-checksum of all of the above. diff --git a/Documentation/technical/pack-heuristics.txt b/Documentation/technical/pack-heuristics.txt new file mode 100644 index 0000000..95a07db --- /dev/null +++ b/Documentation/technical/pack-heuristics.txt @@ -0,0 +1,460 @@ +Concerning Git's Packing Heuristics +=================================== + + Oh, here's a really stupid question: + + Where do I go + to learn the details + of Git's packing heuristics? + +Be careful what you ask! + +Followers of the Git, please open the Git IRC Log and turn to +February 10, 2006. + +It's a rare occasion, and we are joined by the King Git Himself, +Linus Torvalds (linus). Nathaniel Smith, (njs`), has the floor +and seeks enlightenment. Others are present, but silent. + +Let's listen in! + + <njs`> Oh, here's a really stupid question -- where do I go to + learn the details of Git's packing heuristics? google avails + me not, reading the source didn't help a lot, and wading + through the whole mailing list seems less efficient than any + of that. + +It is a bold start! A plea for help combined with a simultaneous +tri-part attack on some of the tried and true mainstays in the quest +for enlightenment. Brash accusations of google being useless. Hubris! +Maligning the source. Heresy! Disdain for the mailing list archives. +Woe. + + <pasky> yes, the packing-related delta stuff is somewhat + mysterious even for me ;) + +Ah! Modesty after all. + + <linus> njs, I don't think the docs exist. That's something where + I don't think anybody else than me even really got involved. + Most of the rest of Git others have been busy with (especially + Junio), but packing nobody touched after I did it. + +It's cryptic, yet vague. Linus in style for sure. Wise men +interpret this as an apology. A few argue it is merely a +statement of fact. + + <njs`> I guess the next step is "read the source again", but I + have to build up a certain level of gumption first :-) + +Indeed! On both points. + + <linus> The packing heuristic is actually really really simple. + +Bait... + + <linus> But strange. + +And switch. That ought to do it! + + <linus> Remember: Git really doesn't follow files. So what it does is + - generate a list of all objects + - sort the list according to magic heuristics + - walk the list, using a sliding window, seeing if an object + can be diffed against another object in the window + - write out the list in recency order + +The traditional understatement: + + <njs`> I suspect that what I'm missing is the precise definition of + the word "magic" + +The traditional insight: + + <pasky> yes + +And Babel-like confusion flowed. + + <njs`> oh, hmm, and I'm not sure what this sliding window means either + + <pasky> iirc, it appeared to me to be just the sha1 of the object + when reading the code casually ... + + ... which simply doesn't sound as a very good heuristics, though ;) + + <njs`> .....and recency order. okay, I think it's clear I didn't + even realize how much I wasn't realizing :-) + +Ah, grasshopper! And thus the enlightenment begins anew. + + <linus> The "magic" is actually in theory totally arbitrary. + ANY order will give you a working pack, but no, it's not + ordered by SHA-1. + + Before talking about the ordering for the sliding delta + window, let's talk about the recency order. That's more + important in one way. + + <njs`> Right, but if all you want is a working way to pack things + together, you could just use cat and save yourself some + trouble... + +Waaait for it.... + + <linus> The recency ordering (which is basically: put objects + _physically_ into the pack in the order that they are + "reachable" from the head) is important. + + <njs`> okay + + <linus> It's important because that's the thing that gives packs + good locality. It keeps the objects close to the head (whether + they are old or new, but they are _reachable_ from the head) + at the head of the pack. So packs actually have absolutely + _wonderful_ IO patterns. + +Read that again, because it is important. + + <linus> But recency ordering is totally useless for deciding how + to actually generate the deltas, so the delta ordering is + something else. + + The delta ordering is (wait for it): + - first sort by the "basename" of the object, as defined by + the name the object was _first_ reached through when + generating the object list + - within the same basename, sort by size of the object + - but always sort different types separately (commits first). + + That's not exactly it, but it's very close. + + <njs`> The "_first_ reached" thing is not too important, just you + need some way to break ties since the same objects may be + reachable many ways, yes? + +And as if to clarify: + + <linus> The point is that it's all really just any random + heuristic, and the ordering is totally unimportant for + correctness, but it helps a lot if the heuristic gives + "clumping" for things that are likely to delta well against + each other. + +It is an important point, so secretly, I did my own research and have +included my results below. To be fair, it has changed some over time. +And through the magic of Revisionistic History, I draw upon this entry +from The Git IRC Logs on my father's birthday, March 1: + + <gitster> The quote from the above linus should be rewritten a + bit (wait for it): + - first sort by type. Different objects never delta with + each other. + - then sort by filename/dirname. hash of the basename + occupies the top BITS_PER_INT-DIR_BITS bits, and bottom + DIR_BITS are for the hash of leading path elements. + - then if we are doing "thin" pack, the objects we are _not_ + going to pack but we know about are sorted earlier than + other objects. + - and finally sort by size, larger to smaller. + +In one swell-foop, clarification and obscurification! Nonetheless, +authoritative. Cryptic, yet concise. It even solicits notions of +quotes from The Source Code. Clearly, more study is needed. + + <gitster> That's the sort order. What this means is: + - we do not delta different object types. + - we prefer to delta the objects with the same full path, but + allow files with the same name from different directories. + - we always prefer to delta against objects we are not going + to send, if there are some. + - we prefer to delta against larger objects, so that we have + lots of removals. + + The penultimate rule is for "thin" packs. It is used when + the other side is known to have such objects. + +There it is again. "Thin" packs. I'm thinking to myself, "What +is a 'thin' pack?" So I ask: + + <jdl> What is a "thin" pack? + + <gitster> Use of --objects-edge to rev-list as the upstream of + pack-objects. The pack transfer protocol negotiates that. + +Woo hoo! Cleared that _right_ up! + + <gitster> There are two directions - push and fetch. + +There! Did you see it? It is not '"push" and "pull"'! How often the +confusion has started here. So casually mentioned, too! + + <gitster> For push, git-send-pack invokes git-receive-pack on the + other end. The receive-pack says "I have up to these commits". + send-pack looks at them, and computes what are missing from + the other end. So "thin" could be the default there. + + In the other direction, fetch, git-fetch-pack and + git-clone-pack invokes git-upload-pack on the other end + (via ssh or by talking to the daemon). + + There are two cases: fetch-pack with -k and clone-pack is one, + fetch-pack without -k is the other. clone-pack and fetch-pack + with -k will keep the downloaded packfile without expanded, so + we do not use thin pack transfer. Otherwise, the generated + pack will have delta without base object in the same pack. + + But fetch-pack without -k will explode the received pack into + individual objects, so we automatically ask upload-pack to + give us a thin pack if upload-pack supports it. + +OK then. + +Uh. + +Let's return to the previous conversation still in progress. + + <njs`> and "basename" means something like "the tail of end of + path of file objects and dir objects, as per basename(3), and + we just declare all commit and tag objects to have the same + basename" or something? + +Luckily, that too is a point that gitster clarified for us! + +If I might add, the trick is to make files that _might_ be similar be +located close to each other in the hash buckets based on their file +names. It used to be that "foo/Makefile", "bar/baz/quux/Makefile" and +"Makefile" all landed in the same bucket due to their common basename, +"Makefile". However, now they land in "close" buckets. + +The algorithm allows not just for the _same_ bucket, but for _close_ +buckets to be considered delta candidates. The rationale is +essentially that files, like Makefiles, often have very similar +content no matter what directory they live in. + + <linus> I played around with different delta algorithms, and with + making the "delta window" bigger, but having too big of a + sliding window makes it very expensive to generate the pack: + you need to compare every object with a _ton_ of other objects. + + There are a number of other trivial heuristics too, which + basically boil down to "don't bother even trying to delta this + pair" if we can tell before-hand that the delta isn't worth it + (due to size differences, where we can take a previous delta + result into account to decide that "ok, no point in trying + that one, it will be worse"). + + End result: packing is actually very size efficient. It's + somewhat CPU-wasteful, but on the other hand, since you're + really only supposed to do it maybe once a month (and you can + do it during the night), nobody really seems to care. + +Nice Engineering Touch, there. Find when it doesn't matter, and +proclaim it a non-issue. Good style too! + + <njs`> So, just to repeat to see if I'm following, we start by + getting a list of the objects we want to pack, we sort it by + this heuristic (basically lexicographically on the tuple + (type, basename, size)). + + Then we walk through this list, and calculate a delta of + each object against the last n (tunable parameter) objects, + and pick the smallest of these deltas. + +Vastly simplified, but the essence is there! + + <linus> Correct. + + <njs`> And then once we have picked a delta or fulltext to + represent each object, we re-sort by recency, and write them + out in that order. + + <linus> Yup. Some other small details: + +And of course there is the "Other Shoe" Factor too. + + <linus> - We limit the delta depth to another magic value (right + now both the window and delta depth magic values are just "10") + + <njs`> Hrm, my intuition is that you'd end up with really _bad_ IO + patterns, because the things you want are near by, but to + actually reconstruct them you may have to jump all over in + random ways. + + <linus> - When we write out a delta, and we haven't yet written + out the object it is a delta against, we write out the base + object first. And no, when we reconstruct them, we actually + get nice IO patterns, because: + - larger objects tend to be "more recent" (Linus' law: files grow) + - we actively try to generate deltas from a larger object to a + smaller one + - this means that the top-of-tree very seldom has deltas + (i.e. deltas in _practice_ are "backwards deltas") + +Again, we should reread that whole paragraph. Not just because +Linus has slipped Linus's Law in there on us, but because it is +important. Let's make sure we clarify some of the points here: + + <njs`> So the point is just that in practice, delta order and + recency order match each other quite well. + + <linus> Yes. There's another nice side to this (and yes, it was + designed that way ;): + - the reason we generate deltas against the larger object is + actually a big space saver too! + + <njs`> Hmm, but your last comment (if "we haven't yet written out + the object it is a delta against, we write out the base object + first"), seems like it would make these facts mostly + irrelevant because even if in practice you would not have to + wander around much, in fact you just brute-force say that in + the cases where you might have to wander, don't do that :-) + + <linus> Yes and no. Notice the rule: we only write out the base + object first if the delta against it was more recent. That + means that you can actually have deltas that refer to a base + object that is _not_ close to the delta object, but that only + happens when the delta is needed to generate an _old_ object. + + <linus> See? + +Yeah, no. I missed that on the first two or three readings myself. + + <linus> This keeps the front of the pack dense. The front of the + pack never contains data that isn't relevant to a "recent" + object. The size optimization comes from our use of xdelta + (but is true for many other delta algorithms): removing data + is cheaper (in size) than adding data. + + When you remove data, you only need to say "copy bytes n--m". + In contrast, in a delta that _adds_ data, you have to say "add + these bytes: 'actual data goes here'" + + *** njs` has quit: Read error: 104 (Connection reset by peer) + + <linus> Uhhuh. I hope I didn't blow njs` mind. + + *** njs` has joined channel #git + + <pasky> :) + +The silent observers are amused. Of course. + +And as if njs` was expected to be omniscient: + + <linus> njs - did you miss anything? + +OK, I'll spell it out. That's Geek Humor. If njs` was not actually +connected for a little bit there, how would he know if missed anything +while he was disconnected? He's a benevolent dictator with a sense of +humor! Well noted! + + <njs`> Stupid router. Or gremlins, or whatever. + +It's a cheap shot at Cisco. Take 'em when you can. + + <njs`> Yes and no. Notice the rule: we only write out the base + object first if the delta against it was more recent. + + I'm getting lost in all these orders, let me re-read :-) + So the write-out order is from most recent to least recent? + (Conceivably it could be the opposite way too, I'm not sure if + we've said) though my connection back at home is logging, so I + can just read what you said there :-) + +And for those of you paying attention, the Omniscient Trick has just +been detailed! + + <linus> Yes, we always write out most recent first + + <njs`> And, yeah, I got the part about deeper-in-history stuff + having worse IO characteristics, one sort of doesn't care. + + <linus> With the caveat that if the "most recent" needs an older + object to delta against (hey, shrinking sometimes does + happen), we write out the old object with the delta. + + <njs`> (if only it happened more...) + + <linus> Anyway, the pack-file could easily be denser still, but + because it's used both for streaming (the Git protocol) and + for on-disk, it has a few pessimizations. + +Actually, it is a made-up word. But it is a made-up word being +used as setup for a later optimization, which is a real word: + + <linus> In particular, while the pack-file is then compressed, + it's compressed just one object at a time, so the actual + compression factor is less than it could be in theory. But it + means that it's all nice random-access with a simple index to + do "object name->location in packfile" translation. + + <njs`> I'm assuming the real win for delta-ing large->small is + more homogeneous statistics for gzip to run over? + + (You have to put the bytes in one place or another, but + putting them in a larger blob wins on compression) + + Actually, what is the compression strategy -- each delta + individually gzipped, the whole file gzipped, somewhere in + between, no compression at all, ....? + + Right. + +Reality IRC sets in. For example: + + <pasky> I'll read the rest in the morning, I really have to go + sleep or there's no hope whatsoever for me at the today's + exam... g'nite all. + +Heh. + + <linus> pasky: g'nite + + <njs`> pasky: 'luck + + <linus> Right: large->small matters exactly because of compression + behaviour. If it was non-compressed, it probably wouldn't make + any difference. + + <njs`> yeah + + <linus> Anyway: I'm not even trying to claim that the pack-files + are perfect, but they do tend to have a nice balance of + density vs ease-of use. + +Gasp! OK, saved. That's a fair Engineering trade off. Close call! +In fact, Linus reflects on some Basic Engineering Fundamentals, +design options, etc. + + <linus> More importantly, they allow Git to still _conceptually_ + never deal with deltas at all, and be a "whole object" store. + + Which has some problems (we discussed bad huge-file + behaviour on the Git lists the other day), but it does mean + that the basic Git concepts are really really simple and + straightforward. + + It's all been quite stable. + + Which I think is very much a result of having very simple + basic ideas, so that there's never any confusion about what's + going on. + + Bugs happen, but they are "simple" bugs. And bugs that + actually get some object store detail wrong are almost always + so obvious that they never go anywhere. + + <njs`> Yeah. + +Nuff said. + + <linus> Anyway. I'm off for bed. It's not 6AM here, but I've got + three kids, and have to get up early in the morning to send + them off. I need my beauty sleep. + + <njs`> :-) + + <njs`> appreciate the infodump, I really was failing to find the + details on Git packs :-) + +And now you know the rest of the story. diff --git a/Documentation/technical/pack-protocol.txt b/Documentation/technical/pack-protocol.txt new file mode 100644 index 0000000..8b36343 --- /dev/null +++ b/Documentation/technical/pack-protocol.txt @@ -0,0 +1,603 @@ +Packfile transfer protocols +=========================== + +Git supports transferring data in packfiles over the ssh://, git://, http:// and +file:// transports. There exist two sets of protocols, one for pushing +data from a client to a server and another for fetching data from a +server to a client. The three transports (ssh, git, file) use the same +protocol to transfer data. http is documented in http-protocol.txt. + +The processes invoked in the canonical Git implementation are 'upload-pack' +on the server side and 'fetch-pack' on the client side for fetching data; +then 'receive-pack' on the server and 'send-pack' on the client for pushing +data. The protocol functions to have a server tell a client what is +currently on the server, then for the two to negotiate the smallest amount +of data to send in order to fully update one or the other. + +pkt-line Format +--------------- + +The descriptions below build on the pkt-line format described in +protocol-common.txt. When the grammar indicate `PKT-LINE(...)`, unless +otherwise noted the usual pkt-line LF rules apply: the sender SHOULD +include a LF, but the receiver MUST NOT complain if it is not present. + +Transports +---------- +There are three transports over which the packfile protocol is +initiated. The Git transport is a simple, unauthenticated server that +takes the command (almost always 'upload-pack', though Git +servers can be configured to be globally writable, in which 'receive- +pack' initiation is also allowed) with which the client wishes to +communicate and executes it and connects it to the requesting +process. + +In the SSH transport, the client just runs the 'upload-pack' +or 'receive-pack' process on the server over the SSH protocol and then +communicates with that invoked process over the SSH connection. + +The file:// transport runs the 'upload-pack' or 'receive-pack' +process locally and communicates with it over a pipe. + +Git Transport +------------- + +The Git transport starts off by sending the command and repository +on the wire using the pkt-line format, followed by a NUL byte and a +hostname parameter, terminated by a NUL byte. + + 0032git-upload-pack /project.git\0host=myserver.com\0 + +-- + git-proto-request = request-command SP pathname NUL [ host-parameter NUL ] + request-command = "git-upload-pack" / "git-receive-pack" / + "git-upload-archive" ; case sensitive + pathname = *( %x01-ff ) ; exclude NUL + host-parameter = "host=" hostname [ ":" port ] +-- + +Only host-parameter is allowed in the git-proto-request. Clients +MUST NOT attempt to send additional parameters. It is used for the +git-daemon name based virtual hosting. See --interpolated-path +option to git daemon, with the %H/%CH format characters. + +Basically what the Git client is doing to connect to an 'upload-pack' +process on the server side over the Git protocol is this: + + $ echo -e -n \ + "0039git-upload-pack /schacon/gitbook.git\0host=example.com\0" | + nc -v example.com 9418 + +If the server refuses the request for some reasons, it could abort +gracefully with an error message. + +---- + error-line = PKT-LINE("ERR" SP explanation-text) +---- + + +SSH Transport +------------- + +Initiating the upload-pack or receive-pack processes over SSH is +executing the binary on the server via SSH remote execution. +It is basically equivalent to running this: + + $ ssh git.example.com "git-upload-pack '/project.git'" + +For a server to support Git pushing and pulling for a given user over +SSH, that user needs to be able to execute one or both of those +commands via the SSH shell that they are provided on login. On some +systems, that shell access is limited to only being able to run those +two commands, or even just one of them. + +In an ssh:// format URI, it's absolute in the URI, so the '/' after +the host name (or port number) is sent as an argument, which is then +read by the remote git-upload-pack exactly as is, so it's effectively +an absolute path in the remote filesystem. + + git clone ssh://user@example.com/project.git + | + v + ssh user@example.com "git-upload-pack '/project.git'" + +In a "user@host:path" format URI, its relative to the user's home +directory, because the Git client will run: + + git clone user@example.com:project.git + | + v + ssh user@example.com "git-upload-pack 'project.git'" + +The exception is if a '~' is used, in which case +we execute it without the leading '/'. + + ssh://user@example.com/~alice/project.git, + | + v + ssh user@example.com "git-upload-pack '~alice/project.git'" + +A few things to remember here: + +- The "command name" is spelled with dash (e.g. git-upload-pack), but + this can be overridden by the client; + +- The repository path is always quoted with single quotes. + +Fetching Data From a Server +--------------------------- + +When one Git repository wants to get data that a second repository +has, the first can 'fetch' from the second. This operation determines +what data the server has that the client does not then streams that +data down to the client in packfile format. + + +Reference Discovery +------------------- + +When the client initially connects the server will immediately respond +with a listing of each reference it has (all branches and tags) along +with the object name that each reference currently points to. + + $ echo -e -n "0039git-upload-pack /schacon/gitbook.git\0host=example.com\0" | + nc -v example.com 9418 + 00887217a7c7e582c46cec22a130adf4b9d7d950fba0 HEAD\0multi_ack thin-pack + side-band side-band-64k ofs-delta shallow no-progress include-tag + 00441d3fcd5ced445d1abc402225c0b8a1299641f497 refs/heads/integration + 003f7217a7c7e582c46cec22a130adf4b9d7d950fba0 refs/heads/master + 003cb88d2441cac0977faf98efc80305012112238d9d refs/tags/v0.9 + 003c525128480b96c89e6418b1e40909bf6c5b2d580f refs/tags/v1.0 + 003fe92df48743b7bc7d26bcaabfddde0a1e20cae47c refs/tags/v1.0^{} + 0000 + +The returned response is a pkt-line stream describing each ref and +its current value. The stream MUST be sorted by name according to +the C locale ordering. + +If HEAD is a valid ref, HEAD MUST appear as the first advertised +ref. If HEAD is not a valid ref, HEAD MUST NOT appear in the +advertisement list at all, but other refs may still appear. + +The stream MUST include capability declarations behind a NUL on the +first ref. The peeled value of a ref (that is "ref^{}") MUST be +immediately after the ref itself, if presented. A conforming server +MUST peel the ref if it's an annotated tag. + +---- + advertised-refs = (no-refs / list-of-refs) + *shallow + flush-pkt + + no-refs = PKT-LINE(zero-id SP "capabilities^{}" + NUL capability-list) + + list-of-refs = first-ref *other-ref + first-ref = PKT-LINE(obj-id SP refname + NUL capability-list) + + other-ref = PKT-LINE(other-tip / other-peeled) + other-tip = obj-id SP refname + other-peeled = obj-id SP refname "^{}" + + shallow = PKT-LINE("shallow" SP obj-id) + + capability-list = capability *(SP capability) + capability = 1*(LC_ALPHA / DIGIT / "-" / "_") + LC_ALPHA = %x61-7A +---- + +Server and client MUST use lowercase for obj-id, both MUST treat obj-id +as case-insensitive. + +See protocol-capabilities.txt for a list of allowed server capabilities +and descriptions. + +Packfile Negotiation +-------------------- +After reference and capabilities discovery, the client can decide to +terminate the connection by sending a flush-pkt, telling the server it can +now gracefully terminate, and disconnect, when it does not need any pack +data. This can happen with the ls-remote command, and also can happen when +the client already is up-to-date. + +Otherwise, it enters the negotiation phase, where the client and +server determine what the minimal packfile necessary for transport is, +by telling the server what objects it wants, its shallow objects +(if any), and the maximum commit depth it wants (if any). The client +will also send a list of the capabilities it wants to be in effect, +out of what the server said it could do with the first 'want' line. + +---- + upload-request = want-list + *shallow-line + *1depth-request + flush-pkt + + want-list = first-want + *additional-want + + shallow-line = PKT-LINE("shallow" SP obj-id) + + depth-request = PKT-LINE("deepen" SP depth) + + first-want = PKT-LINE("want" SP obj-id SP capability-list) + additional-want = PKT-LINE("want" SP obj-id) + + depth = 1*DIGIT +---- + +Clients MUST send all the obj-ids it wants from the reference +discovery phase as 'want' lines. Clients MUST send at least one +'want' command in the request body. Clients MUST NOT mention an +obj-id in a 'want' command which did not appear in the response +obtained through ref discovery. + +The client MUST write all obj-ids which it only has shallow copies +of (meaning that it does not have the parents of a commit) as +'shallow' lines so that the server is aware of the limitations of +the client's history. + +The client now sends the maximum commit history depth it wants for +this transaction, which is the number of commits it wants from the +tip of the history, if any, as a 'deepen' line. A depth of 0 is the +same as not making a depth request. The client does not want to receive +any commits beyond this depth, nor does it want objects needed only to +complete those commits. Commits whose parents are not received as a +result are defined as shallow and marked as such in the server. This +information is sent back to the client in the next step. + +Once all the 'want's and 'shallow's (and optional 'deepen') are +transferred, clients MUST send a flush-pkt, to tell the server side +that it is done sending the list. + +Otherwise, if the client sent a positive depth request, the server +will determine which commits will and will not be shallow and +send this information to the client. If the client did not request +a positive depth, this step is skipped. + +---- + shallow-update = *shallow-line + *unshallow-line + flush-pkt + + shallow-line = PKT-LINE("shallow" SP obj-id) + + unshallow-line = PKT-LINE("unshallow" SP obj-id) +---- + +If the client has requested a positive depth, the server will compute +the set of commits which are no deeper than the desired depth. The set +of commits start at the client's wants. + +The server writes 'shallow' lines for each +commit whose parents will not be sent as a result. The server writes +an 'unshallow' line for each commit which the client has indicated is +shallow, but is no longer shallow at the currently requested depth +(that is, its parents will now be sent). The server MUST NOT mark +as unshallow anything which the client has not indicated was shallow. + +Now the client will send a list of the obj-ids it has using 'have' +lines, so the server can make a packfile that only contains the objects +that the client needs. In multi_ack mode, the canonical implementation +will send up to 32 of these at a time, then will send a flush-pkt. The +canonical implementation will skip ahead and send the next 32 immediately, +so that there is always a block of 32 "in-flight on the wire" at a time. + +---- + upload-haves = have-list + compute-end + + have-list = *have-line + have-line = PKT-LINE("have" SP obj-id) + compute-end = flush-pkt / PKT-LINE("done") +---- + +If the server reads 'have' lines, it then will respond by ACKing any +of the obj-ids the client said it had that the server also has. The +server will ACK obj-ids differently depending on which ack mode is +chosen by the client. + +In multi_ack mode: + + * the server will respond with 'ACK obj-id continue' for any common + commits. + + * once the server has found an acceptable common base commit and is + ready to make a packfile, it will blindly ACK all 'have' obj-ids + back to the client. + + * the server will then send a 'NACK' and then wait for another response + from the client - either a 'done' or another list of 'have' lines. + +In multi_ack_detailed mode: + + * the server will differentiate the ACKs where it is signaling + that it is ready to send data with 'ACK obj-id ready' lines, and + signals the identified common commits with 'ACK obj-id common' lines. + +Without either multi_ack or multi_ack_detailed: + + * upload-pack sends "ACK obj-id" on the first common object it finds. + After that it says nothing until the client gives it a "done". + + * upload-pack sends "NAK" on a flush-pkt if no common object + has been found yet. If one has been found, and thus an ACK + was already sent, it's silent on the flush-pkt. + +After the client has gotten enough ACK responses that it can determine +that the server has enough information to send an efficient packfile +(in the canonical implementation, this is determined when it has received +enough ACKs that it can color everything left in the --date-order queue +as common with the server, or the --date-order queue is empty), or the +client determines that it wants to give up (in the canonical implementation, +this is determined when the client sends 256 'have' lines without getting +any of them ACKed by the server - meaning there is nothing in common and +the server should just send all of its objects), then the client will send +a 'done' command. The 'done' command signals to the server that the client +is ready to receive its packfile data. + +However, the 256 limit *only* turns on in the canonical client +implementation if we have received at least one "ACK %s continue" +during a prior round. This helps to ensure that at least one common +ancestor is found before we give up entirely. + +Once the 'done' line is read from the client, the server will either +send a final 'ACK obj-id' or it will send a 'NAK'. 'obj-id' is the object +name of the last commit determined to be common. The server only sends +ACK after 'done' if there is at least one common base and multi_ack or +multi_ack_detailed is enabled. The server always sends NAK after 'done' +if there is no common base found. + +Then the server will start sending its packfile data. + +---- + server-response = *ack_multi ack / nak + ack_multi = PKT-LINE("ACK" SP obj-id ack_status) + ack_status = "continue" / "common" / "ready" + ack = PKT-LINE("ACK" SP obj-id) + nak = PKT-LINE("NAK") +---- + +A simple clone may look like this (with no 'have' lines): + +---- + C: 0054want 74730d410fcb6603ace96f1dc55ea6196122532d multi_ack \ + side-band-64k ofs-delta\n + C: 0032want 7d1665144a3a975c05f1f43902ddaf084e784dbe\n + C: 0032want 5a3f6be755bbb7deae50065988cbfa1ffa9ab68a\n + C: 0032want 7e47fe2bd8d01d481f44d7af0531bd93d3b21c01\n + C: 0032want 74730d410fcb6603ace96f1dc55ea6196122532d\n + C: 0000 + C: 0009done\n + + S: 0008NAK\n + S: [PACKFILE] +---- + +An incremental update (fetch) response might look like this: + +---- + C: 0054want 74730d410fcb6603ace96f1dc55ea6196122532d multi_ack \ + side-band-64k ofs-delta\n + C: 0032want 7d1665144a3a975c05f1f43902ddaf084e784dbe\n + C: 0032want 5a3f6be755bbb7deae50065988cbfa1ffa9ab68a\n + C: 0000 + C: 0032have 7e47fe2bd8d01d481f44d7af0531bd93d3b21c01\n + C: [30 more have lines] + C: 0032have 74730d410fcb6603ace96f1dc55ea6196122532d\n + C: 0000 + + S: 003aACK 7e47fe2bd8d01d481f44d7af0531bd93d3b21c01 continue\n + S: 003aACK 74730d410fcb6603ace96f1dc55ea6196122532d continue\n + S: 0008NAK\n + + C: 0009done\n + + S: 0031ACK 74730d410fcb6603ace96f1dc55ea6196122532d\n + S: [PACKFILE] +---- + + +Packfile Data +------------- + +Now that the client and server have finished negotiation about what +the minimal amount of data that needs to be sent to the client is, the server +will construct and send the required data in packfile format. + +See pack-format.txt for what the packfile itself actually looks like. + +If 'side-band' or 'side-band-64k' capabilities have been specified by +the client, the server will send the packfile data multiplexed. + +Each packet starting with the packet-line length of the amount of data +that follows, followed by a single byte specifying the sideband the +following data is coming in on. + +In 'side-band' mode, it will send up to 999 data bytes plus 1 control +code, for a total of up to 1000 bytes in a pkt-line. In 'side-band-64k' +mode it will send up to 65519 data bytes plus 1 control code, for a +total of up to 65520 bytes in a pkt-line. + +The sideband byte will be a '1', '2' or a '3'. Sideband '1' will contain +packfile data, sideband '2' will be used for progress information that the +client will generally print to stderr and sideband '3' is used for error +information. + +If no 'side-band' capability was specified, the server will stream the +entire packfile without multiplexing. + + +Pushing Data To a Server +------------------------ + +Pushing data to a server will invoke the 'receive-pack' process on the +server, which will allow the client to tell it which references it should +update and then send all the data the server will need for those new +references to be complete. Once all the data is received and validated, +the server will then update its references to what the client specified. + +Authentication +-------------- + +The protocol itself contains no authentication mechanisms. That is to be +handled by the transport, such as SSH, before the 'receive-pack' process is +invoked. If 'receive-pack' is configured over the Git transport, those +repositories will be writable by anyone who can access that port (9418) as +that transport is unauthenticated. + +Reference Discovery +------------------- + +The reference discovery phase is done nearly the same way as it is in the +fetching protocol. Each reference obj-id and name on the server is sent +in packet-line format to the client, followed by a flush-pkt. The only +real difference is that the capability listing is different - the only +possible values are 'report-status', 'delete-refs' and 'ofs-delta'. + +Reference Update Request and Packfile Transfer +---------------------------------------------- + +Once the client knows what references the server is at, it can send a +list of reference update requests. For each reference on the server +that it wants to update, it sends a line listing the obj-id currently on +the server, the obj-id the client would like to update it to and the name +of the reference. + +This list is followed by a flush-pkt and then the packfile that should +contain all the objects that the server will need to complete the new +references. + +---- + update-request = *shallow ( command-list | push-cert ) [packfile] + + shallow = PKT-LINE("shallow" SP obj-id) + + command-list = PKT-LINE(command NUL capability-list) + *PKT-LINE(command) + flush-pkt + + command = create / delete / update + create = zero-id SP new-id SP name + delete = old-id SP zero-id SP name + update = old-id SP new-id SP name + + old-id = obj-id + new-id = obj-id + + push-cert = PKT-LINE("push-cert" NUL capability-list LF) + PKT-LINE("certificate version 0.1" LF) + PKT-LINE("pusher" SP ident LF) + PKT-LINE("pushee" SP url LF) + PKT-LINE("nonce" SP nonce LF) + PKT-LINE(LF) + *PKT-LINE(command LF) + *PKT-LINE(gpg-signature-lines LF) + PKT-LINE("push-cert-end" LF) + + packfile = "PACK" 28*(OCTET) +---- + +If the receiving end does not support delete-refs, the sending end MUST +NOT ask for delete command. + +If the receiving end does not support push-cert, the sending end +MUST NOT send a push-cert command. When a push-cert command is +sent, command-list MUST NOT be sent; the commands recorded in the +push certificate is used instead. + +The packfile MUST NOT be sent if the only command used is 'delete'. + +A packfile MUST be sent if either create or update command is used, +even if the server already has all the necessary objects. In this +case the client MUST send an empty packfile. The only time this +is likely to happen is if the client is creating +a new branch or a tag that points to an existing obj-id. + +The server will receive the packfile, unpack it, then validate each +reference that is being updated that it hasn't changed while the request +was being processed (the obj-id is still the same as the old-id), and +it will run any update hooks to make sure that the update is acceptable. +If all of that is fine, the server will then update the references. + +Push Certificate +---------------- + +A push certificate begins with a set of header lines. After the +header and an empty line, the protocol commands follow, one per +line. Note that the trailing LF in push-cert PKT-LINEs is _not_ +optional; it must be present. + +Currently, the following header fields are defined: + +`pusher` ident:: + Identify the GPG key in "Human Readable Name <email@address>" + format. + +`pushee` url:: + The repository URL (anonymized, if the URL contains + authentication material) the user who ran `git push` + intended to push into. + +`nonce` nonce:: + The 'nonce' string the receiving repository asked the + pushing user to include in the certificate, to prevent + replay attacks. + +The GPG signature lines are a detached signature for the contents +recorded in the push certificate before the signature block begins. +The detached signature is used to certify that the commands were +given by the pusher, who must be the signer. + +Report Status +------------- + +After receiving the pack data from the sender, the receiver sends a +report if 'report-status' capability is in effect. +It is a short listing of what happened in that update. It will first +list the status of the packfile unpacking as either 'unpack ok' or +'unpack [error]'. Then it will list the status for each of the references +that it tried to update. Each line is either 'ok [refname]' if the +update was successful, or 'ng [refname] [error]' if the update was not. + +---- + report-status = unpack-status + 1*(command-status) + flush-pkt + + unpack-status = PKT-LINE("unpack" SP unpack-result) + unpack-result = "ok" / error-msg + + command-status = command-ok / command-fail + command-ok = PKT-LINE("ok" SP refname) + command-fail = PKT-LINE("ng" SP refname SP error-msg) + + error-msg = 1*(OCTECT) ; where not "ok" +---- + +Updates can be unsuccessful for a number of reasons. The reference can have +changed since the reference discovery phase was originally sent, meaning +someone pushed in the meantime. The reference being pushed could be a +non-fast-forward reference and the update hooks or configuration could be +set to not allow that, etc. Also, some references can be updated while others +can be rejected. + +An example client/server communication might look like this: + +---- + S: 007c74730d410fcb6603ace96f1dc55ea6196122532d refs/heads/local\0report-status delete-refs ofs-delta\n + S: 003e7d1665144a3a975c05f1f43902ddaf084e784dbe refs/heads/debug\n + S: 003f74730d410fcb6603ace96f1dc55ea6196122532d refs/heads/master\n + S: 003f74730d410fcb6603ace96f1dc55ea6196122532d refs/heads/team\n + S: 0000 + + C: 003e7d1665144a3a975c05f1f43902ddaf084e784dbe 74730d410fcb6603ace96f1dc55ea6196122532d refs/heads/debug\n + C: 003e74730d410fcb6603ace96f1dc55ea6196122532d 5a3f6be755bbb7deae50065988cbfa1ffa9ab68a refs/heads/master\n + C: 0000 + C: [PACKDATA] + + S: 000eunpack ok\n + S: 0018ok refs/heads/debug\n + S: 002ang refs/heads/master non-fast-forward\n +---- diff --git a/Documentation/technical/protocol-capabilities.txt b/Documentation/technical/protocol-capabilities.txt new file mode 100644 index 0000000..eaab6b4 --- /dev/null +++ b/Documentation/technical/protocol-capabilities.txt @@ -0,0 +1,277 @@ +Git Protocol Capabilities +========================= + +Servers SHOULD support all capabilities defined in this document. + +On the very first line of the initial server response of either +receive-pack and upload-pack the first reference is followed by +a NUL byte and then a list of space delimited server capabilities. +These allow the server to declare what it can and cannot support +to the client. + +Client will then send a space separated list of capabilities it wants +to be in effect. The client MUST NOT ask for capabilities the server +did not say it supports. + +Server MUST diagnose and abort if capabilities it does not understand +was sent. Server MUST NOT ignore capabilities that client requested +and server advertised. As a consequence of these rules, server MUST +NOT advertise capabilities it does not understand. + +The 'atomic', 'report-status', 'delete-refs', 'quiet', and 'push-cert' +capabilities are sent and recognized by the receive-pack (push to server) +process. + +The 'ofs-delta' and 'side-band-64k' capabilities are sent and recognized +by both upload-pack and receive-pack protocols. The 'agent' capability +may optionally be sent in both protocols. + +All other capabilities are only recognized by the upload-pack (fetch +from server) process. + +multi_ack +--------- + +The 'multi_ack' capability allows the server to return "ACK obj-id +continue" as soon as it finds a commit that it can use as a common +base, between the client's wants and the client's have set. + +By sending this early, the server can potentially head off the client +from walking any further down that particular branch of the client's +repository history. The client may still need to walk down other +branches, sending have lines for those, until the server has a +complete cut across the DAG, or the client has said "done". + +Without multi_ack, a client sends have lines in --date-order until +the server has found a common base. That means the client will send +have lines that are already known by the server to be common, because +they overlap in time with another branch that the server hasn't found +a common base on yet. + +For example suppose the client has commits in caps that the server +doesn't and the server has commits in lower case that the client +doesn't, as in the following diagram: + + +---- u ---------------------- x + / +----- y + / / + a -- b -- c -- d -- E -- F + \ + +--- Q -- R -- S + +If the client wants x,y and starts out by saying have F,S, the server +doesn't know what F,S is. Eventually the client says "have d" and +the server sends "ACK d continue" to let the client know to stop +walking down that line (so don't send c-b-a), but it's not done yet, +it needs a base for x. The client keeps going with S-R-Q, until a +gets reached, at which point the server has a clear base and it all +ends. + +Without multi_ack the client would have sent that c-b-a chain anyway, +interleaved with S-R-Q. + +multi_ack_detailed +------------------ +This is an extension of multi_ack that permits client to better +understand the server's in-memory state. See pack-protocol.txt, +section "Packfile Negotiation" for more information. + +no-done +------- +This capability should only be used with the smart HTTP protocol. If +multi_ack_detailed and no-done are both present, then the sender is +free to immediately send a pack following its first "ACK obj-id ready" +message. + +Without no-done in the smart HTTP protocol, the server session would +end and the client has to make another trip to send "done" before +the server can send the pack. no-done removes the last round and +thus slightly reduces latency. + +thin-pack +--------- + +A thin pack is one with deltas which reference base objects not +contained within the pack (but are known to exist at the receiving +end). This can reduce the network traffic significantly, but it +requires the receiving end to know how to "thicken" these packs by +adding the missing bases to the pack. + +The upload-pack server advertises 'thin-pack' when it can generate +and send a thin pack. A client requests the 'thin-pack' capability +when it understands how to "thicken" it, notifying the server that +it can receive such a pack. A client MUST NOT request the +'thin-pack' capability if it cannot turn a thin pack into a +self-contained pack. + +Receive-pack, on the other hand, is assumed by default to be able to +handle thin packs, but can ask the client not to use the feature by +advertising the 'no-thin' capability. A client MUST NOT send a thin +pack if the server advertises the 'no-thin' capability. + +The reasons for this asymmetry are historical. The receive-pack +program did not exist until after the invention of thin packs, so +historically the reference implementation of receive-pack always +understood thin packs. Adding 'no-thin' later allowed receive-pack +to disable the feature in a backwards-compatible manner. + + +side-band, side-band-64k +------------------------ + +This capability means that server can send, and client understand multiplexed +progress reports and error info interleaved with the packfile itself. + +These two options are mutually exclusive. A modern client always +favors 'side-band-64k'. + +Either mode indicates that the packfile data will be streamed broken +up into packets of up to either 1000 bytes in the case of 'side_band', +or 65520 bytes in the case of 'side_band_64k'. Each packet is made up +of a leading 4-byte pkt-line length of how much data is in the packet, +followed by a 1-byte stream code, followed by the actual data. + +The stream code can be one of: + + 1 - pack data + 2 - progress messages + 3 - fatal error message just before stream aborts + +The "side-band-64k" capability came about as a way for newer clients +that can handle much larger packets to request packets that are +actually crammed nearly full, while maintaining backward compatibility +for the older clients. + +Further, with side-band and its up to 1000-byte messages, it's actually +999 bytes of payload and 1 byte for the stream code. With side-band-64k, +same deal, you have up to 65519 bytes of data and 1 byte for the stream +code. + +The client MUST send only maximum of one of "side-band" and "side- +band-64k". Server MUST diagnose it as an error if client requests +both. + +ofs-delta +--------- + +Server can send, and client understand PACKv2 with delta referring to +its base by position in pack rather than by an obj-id. That is, they can +send/read OBJ_OFS_DELTA (aka type 6) in a packfile. + +agent +----- + +The server may optionally send a capability of the form `agent=X` to +notify the client that the server is running version `X`. The client may +optionally return its own agent string by responding with an `agent=Y` +capability (but it MUST NOT do so if the server did not mention the +agent capability). The `X` and `Y` strings may contain any printable +ASCII characters except space (i.e., the byte range 32 < x < 127), and +are typically of the form "package/version" (e.g., "git/1.8.3.1"). The +agent strings are purely informative for statistics and debugging +purposes, and MUST NOT be used to programmatically assume the presence +or absence of particular features. + +shallow +------- + +This capability adds "deepen", "shallow" and "unshallow" commands to +the fetch-pack/upload-pack protocol so clients can request shallow +clones. + +no-progress +----------- + +The client was started with "git clone -q" or something, and doesn't +want that side band 2. Basically the client just says "I do not +wish to receive stream 2 on sideband, so do not send it to me, and if +you did, I will drop it on the floor anyway". However, the sideband +channel 3 is still used for error responses. + +include-tag +----------- + +The 'include-tag' capability is about sending annotated tags if we are +sending objects they point to. If we pack an object to the client, and +a tag object points exactly at that object, we pack the tag object too. +In general this allows a client to get all new annotated tags when it +fetches a branch, in a single network connection. + +Clients MAY always send include-tag, hardcoding it into a request when +the server advertises this capability. The decision for a client to +request include-tag only has to do with the client's desires for tag +data, whether or not a server had advertised objects in the +refs/tags/* namespace. + +Servers MUST pack the tags if their referrant is packed and the client +has requested include-tags. + +Clients MUST be prepared for the case where a server has ignored +include-tag and has not actually sent tags in the pack. In such +cases the client SHOULD issue a subsequent fetch to acquire the tags +that include-tag would have otherwise given the client. + +The server SHOULD send include-tag, if it supports it, regardless +of whether or not there are tags available. + +report-status +------------- + +The receive-pack process can receive a 'report-status' capability, +which tells it that the client wants a report of what happened after +a packfile upload and reference update. If the pushing client requests +this capability, after unpacking and updating references the server +will respond with whether the packfile unpacked successfully and if +each reference was updated successfully. If any of those were not +successful, it will send back an error message. See pack-protocol.txt +for example messages. + +delete-refs +----------- + +If the server sends back the 'delete-refs' capability, it means that +it is capable of accepting a zero-id value as the target +value of a reference update. It is not sent back by the client, it +simply informs the client that it can be sent zero-id values +to delete references. + +quiet +----- + +If the receive-pack server advertises the 'quiet' capability, it is +capable of silencing human-readable progress output which otherwise may +be shown when processing the received pack. A send-pack client should +respond with the 'quiet' capability to suppress server-side progress +reporting if the local progress reporting is also being suppressed +(e.g., via `push -q`, or if stderr does not go to a tty). + +atomic +------ + +If the server sends the 'atomic' capability it is capable of accepting +atomic pushes. If the pushing client requests this capability, the server +will update the refs in one atomic transaction. Either all refs are +updated or none. + +allow-tip-sha1-in-want +---------------------- + +If the upload-pack server advertises this capability, fetch-pack may +send "want" lines with SHA-1s that exist at the server but are not +advertised by upload-pack. + +allow-reachable-sha1-in-want +---------------------------- + +If the upload-pack server advertises this capability, fetch-pack may +send "want" lines with SHA-1s that exist at the server but are not +advertised by upload-pack. + +push-cert=<nonce> +----------------- + +The receive-pack server that advertises this capability is willing +to accept a signed push certificate, and asks the <nonce> to be +included in the push certificate. A send-pack client MUST NOT +send a push-cert packet unless the receive-pack server advertises +this capability. diff --git a/Documentation/technical/protocol-common.txt b/Documentation/technical/protocol-common.txt new file mode 100644 index 0000000..bf30167 --- /dev/null +++ b/Documentation/technical/protocol-common.txt @@ -0,0 +1,99 @@ +Documentation Common to Pack and Http Protocols +=============================================== + +ABNF Notation +------------- + +ABNF notation as described by RFC 5234 is used within the protocol documents, +except the following replacement core rules are used: +---- + HEXDIG = DIGIT / "a" / "b" / "c" / "d" / "e" / "f" +---- + +We also define the following common rules: +---- + NUL = %x00 + zero-id = 40*"0" + obj-id = 40*(HEXDIGIT) + + refname = "HEAD" + refname /= "refs/" <see discussion below> +---- + +A refname is a hierarchical octet string beginning with "refs/" and +not violating the 'git-check-ref-format' command's validation rules. +More specifically, they: + +. They can include slash `/` for hierarchical (directory) + grouping, but no slash-separated component can begin with a + dot `.`. + +. They must contain at least one `/`. This enforces the presence of a + category like `heads/`, `tags/` etc. but the actual names are not + restricted. + +. They cannot have two consecutive dots `..` anywhere. + +. They cannot have ASCII control characters (i.e. bytes whose + values are lower than \040, or \177 `DEL`), space, tilde `~`, + caret `^`, colon `:`, question-mark `?`, asterisk `*`, + or open bracket `[` anywhere. + +. They cannot end with a slash `/` or a dot `.`. + +. They cannot end with the sequence `.lock`. + +. They cannot contain a sequence `@{`. + +. They cannot contain a `\\`. + + +pkt-line Format +--------------- + +Much (but not all) of the payload is described around pkt-lines. + +A pkt-line is a variable length binary string. The first four bytes +of the line, the pkt-len, indicates the total length of the line, +in hexadecimal. The pkt-len includes the 4 bytes used to contain +the length's hexadecimal representation. + +A pkt-line MAY contain binary data, so implementors MUST ensure +pkt-line parsing/formatting routines are 8-bit clean. + +A non-binary line SHOULD BE terminated by an LF, which if present +MUST be included in the total length. Receivers MUST treat pkt-lines +with non-binary data the same whether or not they contain the trailing +LF (stripping the LF if present, and not complaining when it is +missing). + +The maximum length of a pkt-line's data component is 65520 bytes. +Implementations MUST NOT send pkt-line whose length exceeds 65524 +(65520 bytes of payload + 4 bytes of length data). + +Implementations SHOULD NOT send an empty pkt-line ("0004"). + +A pkt-line with a length field of 0 ("0000"), called a flush-pkt, +is a special case and MUST be handled differently than an empty +pkt-line ("0004"). + +---- + pkt-line = data-pkt / flush-pkt + + data-pkt = pkt-len pkt-payload + pkt-len = 4*(HEXDIG) + pkt-payload = (pkt-len - 4)*(OCTET) + + flush-pkt = "0000" +---- + +Examples (as C-style strings): + +---- + pkt-line actual value + --------------------------------- + "0006a\n" "a\n" + "0005a" "a" + "000bfoobar\n" "foobar\n" + "0004" "" +---- diff --git a/Documentation/technical/racy-git.txt b/Documentation/technical/racy-git.txt new file mode 100644 index 0000000..4a8be4d --- /dev/null +++ b/Documentation/technical/racy-git.txt @@ -0,0 +1,201 @@ +Use of index and Racy Git problem +================================= + +Background +---------- + +The index is one of the most important data structures in Git. +It represents a virtual working tree state by recording list of +paths and their object names and serves as a staging area to +write out the next tree object to be committed. The state is +"virtual" in the sense that it does not necessarily have to, and +often does not, match the files in the working tree. + +There are cases Git needs to examine the differences between the +virtual working tree state in the index and the files in the +working tree. The most obvious case is when the user asks `git +diff` (or its low level implementation, `git diff-files`) or +`git-ls-files --modified`. In addition, Git internally checks +if the files in the working tree are different from what are +recorded in the index to avoid stomping on local changes in them +during patch application, switching branches, and merging. + +In order to speed up this comparison between the files in the +working tree and the index entries, the index entries record the +information obtained from the filesystem via `lstat(2)` system +call when they were last updated. When checking if they differ, +Git first runs `lstat(2)` on the files and compares the result +with this information (this is what was originally done by the +`ce_match_stat()` function, but the current code does it in +`ce_match_stat_basic()` function). If some of these "cached +stat information" fields do not match, Git can tell that the +files are modified without even looking at their contents. + +Note: not all members in `struct stat` obtained via `lstat(2)` +are used for this comparison. For example, `st_atime` obviously +is not useful. Currently, Git compares the file type (regular +files vs symbolic links) and executable bits (only for regular +files) from `st_mode` member, `st_mtime` and `st_ctime` +timestamps, `st_uid`, `st_gid`, `st_ino`, and `st_size` members. +With a `USE_STDEV` compile-time option, `st_dev` is also +compared, but this is not enabled by default because this member +is not stable on network filesystems. With `USE_NSEC` +compile-time option, `st_mtim.tv_nsec` and `st_ctim.tv_nsec` +members are also compared. On Linux, this is not enabled by default +because in-core timestamps can have finer granularity than +on-disk timestamps, resulting in meaningless changes when an +inode is evicted from the inode cache. See commit 8ce13b0 +of git://git.kernel.org/pub/scm/linux/kernel/git/tglx/history.git +([PATCH] Sync in core time granularity with filesystems, +2005-01-04). This patch is included in kernel 2.6.11 and newer, but +only fixes the issue for file systems with exactly 1 ns or 1 s +resolution. Other file systems are still broken in current Linux +kernels (e.g. CEPH, CIFS, NTFS, UDF), see +https://lkml.org/lkml/2015/6/9/714 + +Racy Git +-------- + +There is one slight problem with the optimization based on the +cached stat information. Consider this sequence: + + : modify 'foo' + $ git update-index 'foo' + : modify 'foo' again, in-place, without changing its size + +The first `update-index` computes the object name of the +contents of file `foo` and updates the index entry for `foo` +along with the `struct stat` information. If the modification +that follows it happens very fast so that the file's `st_mtime` +timestamp does not change, after this sequence, the cached stat +information the index entry records still exactly match what you +would see in the filesystem, even though the file `foo` is now +different. +This way, Git can incorrectly think files in the working tree +are unmodified even though they actually are. This is called +the "racy Git" problem (discovered by Pasky), and the entries +that appear clean when they may not be because of this problem +are called "racily clean". + +To avoid this problem, Git does two things: + +. When the cached stat information says the file has not been + modified, and the `st_mtime` is the same as (or newer than) + the timestamp of the index file itself (which is the time `git + update-index foo` finished running in the above example), it + also compares the contents with the object registered in the + index entry to make sure they match. + +. When the index file is updated that contains racily clean + entries, cached `st_size` information is truncated to zero + before writing a new version of the index file. + +Because the index file itself is written after collecting all +the stat information from updated paths, `st_mtime` timestamp of +it is usually the same as or newer than any of the paths the +index contains. And no matter how quick the modification that +follows `git update-index foo` finishes, the resulting +`st_mtime` timestamp on `foo` cannot get a value earlier +than the index file. Therefore, index entries that can be +racily clean are limited to the ones that have the same +timestamp as the index file itself. + +The callers that want to check if an index entry matches the +corresponding file in the working tree continue to call +`ce_match_stat()`, but with this change, `ce_match_stat()` uses +`ce_modified_check_fs()` to see if racily clean ones are +actually clean after comparing the cached stat information using +`ce_match_stat_basic()`. + +The problem the latter solves is this sequence: + + $ git update-index 'foo' + : modify 'foo' in-place without changing its size + : wait for enough time + $ git update-index 'bar' + +Without the latter, the timestamp of the index file gets a newer +value, and falsely clean entry `foo` would not be caught by the +timestamp comparison check done with the former logic anymore. +The latter makes sure that the cached stat information for `foo` +would never match with the file in the working tree, so later +checks by `ce_match_stat_basic()` would report that the index entry +does not match the file and Git does not have to fall back on more +expensive `ce_modified_check_fs()`. + + +Runtime penalty +--------------- + +The runtime penalty of falling back to `ce_modified_check_fs()` +from `ce_match_stat()` can be very expensive when there are many +racily clean entries. An obvious way to artificially create +this situation is to give the same timestamp to all the files in +the working tree in a large project, run `git update-index` on +them, and give the same timestamp to the index file: + + $ date >.datestamp + $ git ls-files | xargs touch -r .datestamp + $ git ls-files | git update-index --stdin + $ touch -r .datestamp .git/index + +This will make all index entries racily clean. The linux project, for +example, there are over 20,000 files in the working tree. On my +Athlon 64 X2 3800+, after the above: + + $ /usr/bin/time git diff-files + 1.68user 0.54system 0:02.22elapsed 100%CPU (0avgtext+0avgdata 0maxresident)k + 0inputs+0outputs (0major+67111minor)pagefaults 0swaps + $ git update-index MAINTAINERS + $ /usr/bin/time git diff-files + 0.02user 0.12system 0:00.14elapsed 100%CPU (0avgtext+0avgdata 0maxresident)k + 0inputs+0outputs (0major+935minor)pagefaults 0swaps + +Running `git update-index` in the middle checked the racily +clean entries, and left the cached `st_mtime` for all the paths +intact because they were actually clean (so this step took about +the same amount of time as the first `git diff-files`). After +that, they are not racily clean anymore but are truly clean, so +the second invocation of `git diff-files` fully took advantage +of the cached stat information. + + +Avoiding runtime penalty +------------------------ + +In order to avoid the above runtime penalty, post 1.4.2 Git used +to have a code that made sure the index file +got timestamp newer than the youngest files in the index when +there are many young files with the same timestamp as the +resulting index file would otherwise would have by waiting +before finishing writing the index file out. + +I suspected that in practice the situation where many paths in the +index are all racily clean was quite rare. The only code paths +that can record recent timestamp for large number of paths are: + +. Initial `git add .` of a large project. + +. `git checkout` of a large project from an empty index into an + unpopulated working tree. + +Note: switching branches with `git checkout` keeps the cached +stat information of existing working tree files that are the +same between the current branch and the new branch, which are +all older than the resulting index file, and they will not +become racily clean. Only the files that are actually checked +out can become racily clean. + +In a large project where raciness avoidance cost really matters, +however, the initial computation of all object names in the +index takes more than one second, and the index file is written +out after all that happens. Therefore the timestamp of the +index file will be more than one seconds later than the +youngest file in the working tree. This means that in these +cases there actually will not be any racily clean entry in +the resulting index. + +Based on this discussion, the current code does not use the +"workaround" to avoid the runtime penalty that does not exist in +practice anymore. This was done with commit 0fc82cff on Aug 15, +2006. diff --git a/Documentation/technical/repository-version.txt b/Documentation/technical/repository-version.txt new file mode 100644 index 0000000..00ad379 --- /dev/null +++ b/Documentation/technical/repository-version.txt @@ -0,0 +1,88 @@ +Git Repository Format Versions +============================== + +Every git repository is marked with a numeric version in the +`core.repositoryformatversion` key of its `config` file. This version +specifies the rules for operating on the on-disk repository data. An +implementation of git which does not understand a particular version +advertised by an on-disk repository MUST NOT operate on that repository; +doing so risks not only producing wrong results, but actually losing +data. + +Because of this rule, version bumps should be kept to an absolute +minimum. Instead, we generally prefer these strategies: + + - bumping format version numbers of individual data files (e.g., + index, packfiles, etc). This restricts the incompatibilities only to + those files. + + - introducing new data that gracefully degrades when used by older + clients (e.g., pack bitmap files are ignored by older clients, which + simply do not take advantage of the optimization they provide). + +A whole-repository format version bump should only be part of a change +that cannot be independently versioned. For instance, if one were to +change the reachability rules for objects, or the rules for locking +refs, that would require a bump of the repository format version. + +Note that this applies only to accessing the repository's disk contents +directly. An older client which understands only format `0` may still +connect via `git://` to a repository using format `1`, as long as the +server process understands format `1`. + +The preferred strategy for rolling out a version bump (whether whole +repository or for a single file) is to teach git to read the new format, +and allow writing the new format with a config switch or command line +option (for experimentation or for those who do not care about backwards +compatibility with older gits). Then after a long period to allow the +reading capability to become common, we may switch to writing the new +format by default. + +The currently defined format versions are: + +Version `0` +----------- + +This is the format defined by the initial version of git, including but +not limited to the format of the repository directory, the repository +configuration file, and the object and ref storage. Specifying the +complete behavior of git is beyond the scope of this document. + +Version `1` +----------- + +This format is identical to version `0`, with the following exceptions: + + 1. When reading the `core.repositoryformatversion` variable, a git + implementation which supports version 1 MUST also read any + configuration keys found in the `extensions` section of the + configuration file. + + 2. If a version-1 repository specifies any `extensions.*` keys that + the running git has not implemented, the operation MUST NOT + proceed. Similarly, if the value of any known key is not understood + by the implementation, the operation MUST NOT proceed. + +Note that if no extensions are specified in the config file, then +`core.repositoryformatversion` SHOULD be set to `0` (setting it to `1` +provides no benefit, and makes the repository incompatible with older +implementations of git). + +This document will serve as the master list for extensions. Any +implementation wishing to define a new extension should make a note of +it here, in order to claim the name. + +The defined extensions are: + +`noop` +~~~~~~ + +This extension does not change git's behavior at all. It is useful only +for testing format-1 compatibility. + +`preciousObjects` +~~~~~~~~~~~~~~~~~ + +When the config key `extensions.preciousObjects` is set to `true`, +objects in the repository MUST NOT be deleted (e.g., by `git-prune` or +`git repack -d`). diff --git a/Documentation/technical/send-pack-pipeline.txt b/Documentation/technical/send-pack-pipeline.txt new file mode 100644 index 0000000..9b5a0bc --- /dev/null +++ b/Documentation/technical/send-pack-pipeline.txt @@ -0,0 +1,63 @@ +Git-send-pack internals +======================= + +Overall operation +----------------- + +. Connects to the remote side and invokes git-receive-pack. + +. Learns what refs the remote has and what commit they point at. + Matches them to the refspecs we are pushing. + +. Checks if there are non-fast-forwards. Unlike fetch-pack, + the repository send-pack runs in is supposed to be a superset + of the recipient in fast-forward cases, so there is no need + for want/have exchanges, and fast-forward check can be done + locally. Tell the result to the other end. + +. Calls pack_objects() which generates a packfile and sends it + over to the other end. + +. If the remote side is new enough (v1.1.0 or later), wait for + the unpack and hook status from the other end. + +. Exit with appropriate error codes. + + +Pack_objects pipeline +--------------------- + +This function gets one file descriptor (`fd`) which is either a +socket (over the network) or a pipe (local). What's written to +this fd goes to git-receive-pack to be unpacked. + + send-pack ---> fd ---> receive-pack + +The function pack_objects creates a pipe and then forks. The +forked child execs pack-objects with --revs to receive revision +parameters from its standard input. This process will write the +packfile to the other end. + + send-pack + | + pack_objects() ---> fd ---> receive-pack + | ^ (pipe) + v | + (child) + +The child dup2's to arrange its standard output to go back to +the other end, and read its standard input to come from the +pipe. After that it exec's pack-objects. On the other hand, +the parent process, before starting to feed the child pipeline, +closes the reading side of the pipe and fd to receive-pack. + + send-pack + | + pack_objects(parent) + | + v [0] + pack-objects [0] ---> receive-pack + + +[jc: the pipeline was much more complex and needed documentation before + I understood an earlier bug, but now it is trivial and straightforward.] diff --git a/Documentation/technical/shallow.txt b/Documentation/technical/shallow.txt new file mode 100644 index 0000000..5183b15 --- /dev/null +++ b/Documentation/technical/shallow.txt @@ -0,0 +1,58 @@ +Shallow commits +=============== + +.Definition +********************************************************* +Shallow commits do have parents, but not in the shallow +repo, and therefore grafts are introduced pretending that +these commits have no parents. +********************************************************* + +The basic idea is to write the SHA-1s of shallow commits into +$GIT_DIR/shallow, and handle its contents like the contents +of $GIT_DIR/info/grafts (with the difference that shallow +cannot contain parent information). + +This information is stored in a new file instead of grafts, or +even the config, since the user should not touch that file +at all (even throughout development of the shallow clone, it +was never manually edited!). + +Each line contains exactly one SHA-1. When read, a commit_graft +will be constructed, which has nr_parent < 0 to make it easier +to discern from user provided grafts. + +Since fsck-objects relies on the library to read the objects, +it honours shallow commits automatically. + +There are some unfinished ends of the whole shallow business: + +- maybe we have to force non-thin packs when fetching into a + shallow repo (ATM they are forced non-thin). + +- A special handling of a shallow upstream is needed. At some + stage, upload-pack has to check if it sends a shallow commit, + and it should send that information early (or fail, if the + client does not support shallow repositories). There is no + support at all for this in this patch series. + +- Instead of locking $GIT_DIR/shallow at the start, just + the timestamp of it is noted, and when it comes to writing it, + a check is performed if the mtime is still the same, dying if + it is not. + +- It is unclear how "push into/from a shallow repo" should behave. + +- If you deepen a history, you'd want to get the tags of the + newly stored (but older!) commits. This does not work right now. + +To make a shallow clone, you can call "git-clone --depth 20 repo". +The result contains only commit chains with a length of at most 20. +It also writes an appropriate $GIT_DIR/shallow. + +You can deepen a shallow repository with "git-fetch --depth 20 +repo branch", which will fetch branch from repo, but stop at depth +20, updating $GIT_DIR/shallow. + +The special depth 2147483647 (or 0x7fffffff, the largest positive +number a signed 32-bit integer can contain) means infinite depth. diff --git a/Documentation/technical/trivial-merge.txt b/Documentation/technical/trivial-merge.txt new file mode 100644 index 0000000..c79d4a7 --- /dev/null +++ b/Documentation/technical/trivial-merge.txt @@ -0,0 +1,121 @@ +Trivial merge rules +=================== + +This document describes the outcomes of the trivial merge logic in read-tree. + +One-way merge +------------- + +This replaces the index with a different tree, keeping the stat info +for entries that don't change, and allowing -u to make the minimum +required changes to the working tree to have it match. + +Entries marked '+' have stat information. Spaces marked '*' don't +affect the result. + + index tree result + ----------------------- + * (empty) (empty) + (empty) tree tree + index+ tree tree + index+ index index+ + +Two-way merge +------------- + +It is permitted for the index to lack an entry; this does not prevent +any case from applying. + +If the index exists, it is an error for it not to match either the old +or the result. + +If multiple cases apply, the one used is listed first. + +A result which changes the index is an error if the index is not empty +and not up-to-date. + +Entries marked '+' have stat information. Spaces marked '*' don't +affect the result. + + case index old new result + ------------------------------------- + 0/2 (empty) * (empty) (empty) + 1/3 (empty) * new new + 4/5 index+ (empty) (empty) index+ + 6/7 index+ (empty) index index+ + 10 index+ index (empty) (empty) + 14/15 index+ old old index+ + 18/19 index+ old index index+ + 20 index+ index new new + +Three-way merge +--------------- + +It is permitted for the index to lack an entry; this does not prevent +any case from applying. + +If the index exists, it is an error for it not to match either the +head or (if the merge is trivial) the result. + +If multiple cases apply, the one used is listed first. + +A result of "no merge" means that index is left in stage 0, ancest in +stage 1, head in stage 2, and remote in stage 3 (if any of these are +empty, no entry is left for that stage). Otherwise, the given entry is +left in stage 0, and there are no other entries. + +A result of "no merge" is an error if the index is not empty and not +up-to-date. + +*empty* means that the tree must not have a directory-file conflict + with the entry. + +For multiple ancestors, a '+' means that this case applies even if +only one ancestor or remote fits; a '^' means all of the ancestors +must be the same. + + case ancest head remote result + ---------------------------------------- + 1 (empty)+ (empty) (empty) (empty) + 2ALT (empty)+ *empty* remote remote + 2 (empty)^ (empty) remote no merge + 3ALT (empty)+ head *empty* head + 3 (empty)^ head (empty) no merge + 4 (empty)^ head remote no merge + 5ALT * head head head + 6 ancest+ (empty) (empty) no merge + 8 ancest^ (empty) ancest no merge + 7 ancest+ (empty) remote no merge + 10 ancest^ ancest (empty) no merge + 9 ancest+ head (empty) no merge + 16 anc1/anc2 anc1 anc2 no merge + 13 ancest+ head ancest head + 14 ancest+ ancest remote remote + 11 ancest+ head remote no merge + +Only #2ALT and #3ALT use *empty*, because these are the only cases +where there can be conflicts that didn't exist before. Note that we +allow directory-file conflicts between things in different stages +after the trivial merge. + +A possible alternative for #6 is (empty), which would make it like +#1. This is not used, due to the likelihood that it arises due to +moving the file to multiple different locations or moving and deleting +it in different branches. + +Case #1 is included for completeness, and also in case we decide to +put on '+' markings; any path that is never mentioned at all isn't +handled. + +Note that #16 is when both #13 and #14 apply; in this case, we refuse +the trivial merge, because we can't tell from this data which is +right. This is a case of a reverted patch (in some direction, maybe +multiple times), and the right answer depends on looking at crossings +of history or common ancestors of the ancestors. + +Note that, between #6, #7, #9, and #11, all cases not otherwise +covered are handled in this table. + +For #8 and #10, there is alternative behavior, not currently +implemented, where the result is (empty). As currently implemented, +the automatic merge will generally give this effect. diff --git a/Documentation/urls-remotes.txt b/Documentation/urls-remotes.txt new file mode 100644 index 0000000..bd184cd --- /dev/null +++ b/Documentation/urls-remotes.txt @@ -0,0 +1,94 @@ +include::urls.txt[] + +REMOTES[[REMOTES]] +------------------ + +The name of one of the following can be used instead +of a URL as `<repository>` argument: + +* a remote in the Git configuration file: `$GIT_DIR/config`, +* a file in the `$GIT_DIR/remotes` directory, or +* a file in the `$GIT_DIR/branches` directory. + +All of these also allow you to omit the refspec from the command line +because they each contain a refspec which git will use by default. + +Named remote in configuration file +~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ + +You can choose to provide the name of a remote which you had previously +configured using linkgit:git-remote[1], linkgit:git-config[1] +or even by a manual edit to the `$GIT_DIR/config` file. The URL of +this remote will be used to access the repository. The refspec +of this remote will be used by default when you do +not provide a refspec on the command line. The entry in the +config file would appear like this: + +------------ + [remote "<name>"] + url = <url> + pushurl = <pushurl> + push = <refspec> + fetch = <refspec> +------------ + +The `<pushurl>` is used for pushes only. It is optional and defaults +to `<url>`. + +Named file in `$GIT_DIR/remotes` +~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ + +You can choose to provide the name of a +file in `$GIT_DIR/remotes`. The URL +in this file will be used to access the repository. The refspec +in this file will be used as default when you do not +provide a refspec on the command line. This file should have the +following format: + +------------ + URL: one of the above URL format + Push: <refspec> + Pull: <refspec> + +------------ + +`Push:` lines are used by 'git push' and +`Pull:` lines are used by 'git pull' and 'git fetch'. +Multiple `Push:` and `Pull:` lines may +be specified for additional branch mappings. + +Named file in `$GIT_DIR/branches` +~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ + +You can choose to provide the name of a +file in `$GIT_DIR/branches`. +The URL in this file will be used to access the repository. +This file should have the following format: + + +------------ + <url>#<head> +------------ + +`<url>` is required; `#<head>` is optional. + +Depending on the operation, git will use one of the following +refspecs, if you don't provide one on the command line. +`<branch>` is the name of this file in `$GIT_DIR/branches` and +`<head>` defaults to `master`. + +git fetch uses: + +------------ + refs/heads/<head>:refs/heads/<branch> +------------ + +git push uses: + +------------ + HEAD:refs/heads/<head> +------------ + + + + diff --git a/Documentation/urls.txt b/Documentation/urls.txt new file mode 100644 index 0000000..b05da95 --- /dev/null +++ b/Documentation/urls.txt @@ -0,0 +1,105 @@ +GIT URLS[[URLS]] +---------------- + +In general, URLs contain information about the transport protocol, the +address of the remote server, and the path to the repository. +Depending on the transport protocol, some of this information may be +absent. + +Git supports ssh, git, http, and https protocols (in addition, ftp, +and ftps can be used for fetching, but this is inefficient and +deprecated; do not use it). + +The native transport (i.e. git:// URL) does no authentication and +should be used with caution on unsecured networks. + +The following syntaxes may be used with them: + +- ssh://{startsb}user@{endsb}host.xz{startsb}:port{endsb}/path/to/repo.git/ +- git://host.xz{startsb}:port{endsb}/path/to/repo.git/ +- http{startsb}s{endsb}://host.xz{startsb}:port{endsb}/path/to/repo.git/ +- ftp{startsb}s{endsb}://host.xz{startsb}:port{endsb}/path/to/repo.git/ + +An alternative scp-like syntax may also be used with the ssh protocol: + +- {startsb}user@{endsb}host.xz:path/to/repo.git/ + +This syntax is only recognized if there are no slashes before the +first colon. This helps differentiate a local path that contains a +colon. For example the local path `foo:bar` could be specified as an +absolute path or `./foo:bar` to avoid being misinterpreted as an ssh +url. + +The ssh and git protocols additionally support ~username expansion: + +- ssh://{startsb}user@{endsb}host.xz{startsb}:port{endsb}/~{startsb}user{endsb}/path/to/repo.git/ +- git://host.xz{startsb}:port{endsb}/~{startsb}user{endsb}/path/to/repo.git/ +- {startsb}user@{endsb}host.xz:/~{startsb}user{endsb}/path/to/repo.git/ + +For local repositories, also supported by Git natively, the following +syntaxes may be used: + +- /path/to/repo.git/ +- \file:///path/to/repo.git/ + +ifndef::git-clone[] +These two syntaxes are mostly equivalent, except when cloning, when +the former implies --local option. See linkgit:git-clone[1] for +details. +endif::git-clone[] + +ifdef::git-clone[] +These two syntaxes are mostly equivalent, except the former implies +--local option. +endif::git-clone[] + +When Git doesn't know how to handle a certain transport protocol, it +attempts to use the 'remote-<transport>' remote helper, if one +exists. To explicitly request a remote helper, the following syntax +may be used: + +- <transport>::<address> + +where <address> may be a path, a server and path, or an arbitrary +URL-like string recognized by the specific remote helper being +invoked. See linkgit:gitremote-helpers[1] for details. + +If there are a large number of similarly-named remote repositories and +you want to use a different format for them (such that the URLs you +use will be rewritten into URLs that work), you can create a +configuration section of the form: + +------------ + [url "<actual url base>"] + insteadOf = <other url base> +------------ + +For example, with this: + +------------ + [url "git://git.host.xz/"] + insteadOf = host.xz:/path/to/ + insteadOf = work: +------------ + +a URL like "work:repo.git" or like "host.xz:/path/to/repo.git" will be +rewritten in any context that takes a URL to be "git://git.host.xz/repo.git". + +If you want to rewrite URLs for push only, you can create a +configuration section of the form: + +------------ + [url "<actual url base>"] + pushInsteadOf = <other url base> +------------ + +For example, with this: + +------------ + [url "ssh://example.org/"] + pushInsteadOf = git://example.org/ +------------ + +a URL like "git://example.org/path/to/repo.git" will be rewritten to +"ssh://example.org/path/to/repo.git" for pushes, but pulls will still +use the original URL. diff --git a/Documentation/user-manual.conf b/Documentation/user-manual.conf new file mode 100644 index 0000000..d87294d --- /dev/null +++ b/Documentation/user-manual.conf @@ -0,0 +1,21 @@ +[titles] + underlines="__","==","--","~~","^^" + +[attributes] +caret=^ +startsb=[ +endsb=] +tilde=~ + +[linkgit-inlinemacro] +<ulink url="{target}.html">{target}{0?({0})}</ulink> + +ifdef::backend-docbook[] +# "unbreak" docbook-xsl v1.68 for manpages. v1.69 works with or without this. +[listingblock] +<example><title>{title}</title> +<literallayout class="monospaced"> +| +</literallayout> +{title#}</example> +endif::backend-docbook[] diff --git a/Documentation/user-manual.txt b/Documentation/user-manual.txt new file mode 100644 index 0000000..5e07454 --- /dev/null +++ b/Documentation/user-manual.txt @@ -0,0 +1,4683 @@ +Git User Manual +=============== + +Git is a fast distributed revision control system. + +This manual is designed to be readable by someone with basic UNIX +command-line skills, but no previous knowledge of Git. + +<<repositories-and-branches>> and <<exploring-git-history>> explain how +to fetch and study a project using git--read these chapters to learn how +to build and test a particular version of a software project, search for +regressions, and so on. + +People needing to do actual development will also want to read +<<Developing-With-git>> and <<sharing-development>>. + +Further chapters cover more specialized topics. + +Comprehensive reference documentation is available through the man +pages, or linkgit:git-help[1] command. For example, for the command +`git clone <repo>`, you can either use: + +------------------------------------------------ +$ man git-clone +------------------------------------------------ + +or: + +------------------------------------------------ +$ git help clone +------------------------------------------------ + +With the latter, you can use the manual viewer of your choice; see +linkgit:git-help[1] for more information. + +See also <<git-quick-start>> for a brief overview of Git commands, +without any explanation. + +Finally, see <<todo>> for ways that you can help make this manual more +complete. + + +[[repositories-and-branches]] +Repositories and Branches +========================= + +[[how-to-get-a-git-repository]] +How to get a Git repository +--------------------------- + +It will be useful to have a Git repository to experiment with as you +read this manual. + +The best way to get one is by using the linkgit:git-clone[1] command to +download a copy of an existing repository. If you don't already have a +project in mind, here are some interesting examples: + +------------------------------------------------ + # Git itself (approx. 40MB download): +$ git clone git://git.kernel.org/pub/scm/git/git.git + # the Linux kernel (approx. 640MB download): +$ git clone git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git +------------------------------------------------ + +The initial clone may be time-consuming for a large project, but you +will only need to clone once. + +The clone command creates a new directory named after the project +(`git` or `linux` in the examples above). After you cd into this +directory, you will see that it contains a copy of the project files, +called the <<def_working_tree,working tree>>, together with a special +top-level directory named `.git`, which contains all the information +about the history of the project. + +[[how-to-check-out]] +How to check out a different version of a project +------------------------------------------------- + +Git is best thought of as a tool for storing the history of a collection +of files. It stores the history as a compressed collection of +interrelated snapshots of the project's contents. In Git each such +version is called a <<def_commit,commit>>. + +Those snapshots aren't necessarily all arranged in a single line from +oldest to newest; instead, work may simultaneously proceed along +parallel lines of development, called <<def_branch,branches>>, which may +merge and diverge. + +A single Git repository can track development on multiple branches. It +does this by keeping a list of <<def_head,heads>> which reference the +latest commit on each branch; the linkgit:git-branch[1] command shows +you the list of branch heads: + +------------------------------------------------ +$ git branch +* master +------------------------------------------------ + +A freshly cloned repository contains a single branch head, by default +named "master", with the working directory initialized to the state of +the project referred to by that branch head. + +Most projects also use <<def_tag,tags>>. Tags, like heads, are +references into the project's history, and can be listed using the +linkgit:git-tag[1] command: + +------------------------------------------------ +$ git tag -l +v2.6.11 +v2.6.11-tree +v2.6.12 +v2.6.12-rc2 +v2.6.12-rc3 +v2.6.12-rc4 +v2.6.12-rc5 +v2.6.12-rc6 +v2.6.13 +... +------------------------------------------------ + +Tags are expected to always point at the same version of a project, +while heads are expected to advance as development progresses. + +Create a new branch head pointing to one of these versions and check it +out using linkgit:git-checkout[1]: + +------------------------------------------------ +$ git checkout -b new v2.6.13 +------------------------------------------------ + +The working directory then reflects the contents that the project had +when it was tagged v2.6.13, and linkgit:git-branch[1] shows two +branches, with an asterisk marking the currently checked-out branch: + +------------------------------------------------ +$ git branch + master +* new +------------------------------------------------ + +If you decide that you'd rather see version 2.6.17, you can modify +the current branch to point at v2.6.17 instead, with + +------------------------------------------------ +$ git reset --hard v2.6.17 +------------------------------------------------ + +Note that if the current branch head was your only reference to a +particular point in history, then resetting that branch may leave you +with no way to find the history it used to point to; so use this command +carefully. + +[[understanding-commits]] +Understanding History: Commits +------------------------------ + +Every change in the history of a project is represented by a commit. +The linkgit:git-show[1] command shows the most recent commit on the +current branch: + +------------------------------------------------ +$ git show +commit 17cf781661e6d38f737f15f53ab552f1e95960d7 +Author: Linus Torvalds <torvalds@ppc970.osdl.org.(none)> +Date: Tue Apr 19 14:11:06 2005 -0700 + + Remove duplicate getenv(DB_ENVIRONMENT) call + + Noted by Tony Luck. + +diff --git a/init-db.c b/init-db.c +index 65898fa..b002dc6 100644 +--- a/init-db.c ++++ b/init-db.c +@@ -7,7 +7,7 @@ + + int main(int argc, char **argv) + { +- char *sha1_dir = getenv(DB_ENVIRONMENT), *path; ++ char *sha1_dir, *path; + int len, i; + + if (mkdir(".git", 0755) < 0) { +------------------------------------------------ + +As you can see, a commit shows who made the latest change, what they +did, and why. + +Every commit has a 40-hexdigit id, sometimes called the "object name" or the +"SHA-1 id", shown on the first line of the `git show` output. You can usually +refer to a commit by a shorter name, such as a tag or a branch name, but this +longer name can also be useful. Most importantly, it is a globally unique +name for this commit: so if you tell somebody else the object name (for +example in email), then you are guaranteed that name will refer to the same +commit in their repository that it does in yours (assuming their repository +has that commit at all). Since the object name is computed as a hash over the +contents of the commit, you are guaranteed that the commit can never change +without its name also changing. + +In fact, in <<git-concepts>> we shall see that everything stored in Git +history, including file data and directory contents, is stored in an object +with a name that is a hash of its contents. + +[[understanding-reachability]] +Understanding history: commits, parents, and reachability +~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ + +Every commit (except the very first commit in a project) also has a +parent commit which shows what happened before this commit. +Following the chain of parents will eventually take you back to the +beginning of the project. + +However, the commits do not form a simple list; Git allows lines of +development to diverge and then reconverge, and the point where two +lines of development reconverge is called a "merge". The commit +representing a merge can therefore have more than one parent, with +each parent representing the most recent commit on one of the lines +of development leading to that point. + +The best way to see how this works is using the linkgit:gitk[1] +command; running gitk now on a Git repository and looking for merge +commits will help understand how Git organizes history. + +In the following, we say that commit X is "reachable" from commit Y +if commit X is an ancestor of commit Y. Equivalently, you could say +that Y is a descendant of X, or that there is a chain of parents +leading from commit Y to commit X. + +[[history-diagrams]] +Understanding history: History diagrams +~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ + +We will sometimes represent Git history using diagrams like the one +below. Commits are shown as "o", and the links between them with +lines drawn with - / and \. Time goes left to right: + + +................................................ + o--o--o <-- Branch A + / + o--o--o <-- master + \ + o--o--o <-- Branch B +................................................ + +If we need to talk about a particular commit, the character "o" may +be replaced with another letter or number. + +[[what-is-a-branch]] +Understanding history: What is a branch? +~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ + +When we need to be precise, we will use the word "branch" to mean a line +of development, and "branch head" (or just "head") to mean a reference +to the most recent commit on a branch. In the example above, the branch +head named "A" is a pointer to one particular commit, but we refer to +the line of three commits leading up to that point as all being part of +"branch A". + +However, when no confusion will result, we often just use the term +"branch" both for branches and for branch heads. + +[[manipulating-branches]] +Manipulating branches +--------------------- + +Creating, deleting, and modifying branches is quick and easy; here's +a summary of the commands: + +`git branch`:: + list all branches. +`git branch <branch>`:: + create a new branch named `<branch>`, referencing the same + point in history as the current branch. +`git branch <branch> <start-point>`:: + create a new branch named `<branch>`, referencing + `<start-point>`, which may be specified any way you like, + including using a branch name or a tag name. +`git branch -d <branch>`:: + delete the branch `<branch>`; if the branch is not fully + merged in its upstream branch or contained in the current branch, + this command will fail with a warning. +`git branch -D <branch>`:: + delete the branch `<branch>` irrespective of its merged status. +`git checkout <branch>`:: + make the current branch `<branch>`, updating the working + directory to reflect the version referenced by `<branch>`. +`git checkout -b <new> <start-point>`:: + create a new branch `<new>` referencing `<start-point>`, and + check it out. + +The special symbol "HEAD" can always be used to refer to the current +branch. In fact, Git uses a file named `HEAD` in the `.git` directory +to remember which branch is current: + +------------------------------------------------ +$ cat .git/HEAD +ref: refs/heads/master +------------------------------------------------ + +[[detached-head]] +Examining an old version without creating a new branch +------------------------------------------------------ + +The `git checkout` command normally expects a branch head, but will also +accept an arbitrary commit; for example, you can check out the commit +referenced by a tag: + +------------------------------------------------ +$ git checkout v2.6.17 +Note: checking out 'v2.6.17'. + +You are in 'detached HEAD' state. You can look around, make experimental +changes and commit them, and you can discard any commits you make in this +state without impacting any branches by performing another checkout. + +If you want to create a new branch to retain commits you create, you may +do so (now or later) by using -b with the checkout command again. Example: + + git checkout -b new_branch_name + +HEAD is now at 427abfa... Linux v2.6.17 +------------------------------------------------ + +The HEAD then refers to the SHA-1 of the commit instead of to a branch, +and git branch shows that you are no longer on a branch: + +------------------------------------------------ +$ cat .git/HEAD +427abfa28afedffadfca9dd8b067eb6d36bac53f +$ git branch +* (detached from v2.6.17) + master +------------------------------------------------ + +In this case we say that the HEAD is "detached". + +This is an easy way to check out a particular version without having to +make up a name for the new branch. You can still create a new branch +(or tag) for this version later if you decide to. + +[[examining-remote-branches]] +Examining branches from a remote repository +------------------------------------------- + +The "master" branch that was created at the time you cloned is a copy +of the HEAD in the repository that you cloned from. That repository +may also have had other branches, though, and your local repository +keeps branches which track each of those remote branches, called +remote-tracking branches, which you +can view using the `-r` option to linkgit:git-branch[1]: + +------------------------------------------------ +$ git branch -r + origin/HEAD + origin/html + origin/maint + origin/man + origin/master + origin/next + origin/pu + origin/todo +------------------------------------------------ + +In this example, "origin" is called a remote repository, or "remote" +for short. The branches of this repository are called "remote +branches" from our point of view. The remote-tracking branches listed +above were created based on the remote branches at clone time and will +be updated by `git fetch` (hence `git pull`) and `git push`. See +<<Updating-a-repository-With-git-fetch>> for details. + +You might want to build on one of these remote-tracking branches +on a branch of your own, just as you would for a tag: + +------------------------------------------------ +$ git checkout -b my-todo-copy origin/todo +------------------------------------------------ + +You can also check out `origin/todo` directly to examine it or +write a one-off patch. See <<detached-head,detached head>>. + +Note that the name "origin" is just the name that Git uses by default +to refer to the repository that you cloned from. + +[[how-git-stores-references]] +Naming branches, tags, and other references +------------------------------------------- + +Branches, remote-tracking branches, and tags are all references to +commits. All references are named with a slash-separated path name +starting with `refs`; the names we've been using so far are actually +shorthand: + + - The branch `test` is short for `refs/heads/test`. + - The tag `v2.6.18` is short for `refs/tags/v2.6.18`. + - `origin/master` is short for `refs/remotes/origin/master`. + +The full name is occasionally useful if, for example, there ever +exists a tag and a branch with the same name. + +(Newly created refs are actually stored in the `.git/refs` directory, +under the path given by their name. However, for efficiency reasons +they may also be packed together in a single file; see +linkgit:git-pack-refs[1]). + +As another useful shortcut, the "HEAD" of a repository can be referred +to just using the name of that repository. So, for example, "origin" +is usually a shortcut for the HEAD branch in the repository "origin". + +For the complete list of paths which Git checks for references, and +the order it uses to decide which to choose when there are multiple +references with the same shorthand name, see the "SPECIFYING +REVISIONS" section of linkgit:gitrevisions[7]. + +[[Updating-a-repository-With-git-fetch]] +Updating a repository with git fetch +------------------------------------ + +After you clone a repository and commit a few changes of your own, you +may wish to check the original repository for updates. + +The `git-fetch` command, with no arguments, will update all of the +remote-tracking branches to the latest version found in the original +repository. It will not touch any of your own branches--not even the +"master" branch that was created for you on clone. + +[[fetching-branches]] +Fetching branches from other repositories +----------------------------------------- + +You can also track branches from repositories other than the one you +cloned from, using linkgit:git-remote[1]: + +------------------------------------------------- +$ git remote add staging git://git.kernel.org/.../gregkh/staging.git +$ git fetch staging +... +From git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/staging + * [new branch] master -> staging/master + * [new branch] staging-linus -> staging/staging-linus + * [new branch] staging-next -> staging/staging-next +------------------------------------------------- + +New remote-tracking branches will be stored under the shorthand name +that you gave `git remote add`, in this case `staging`: + +------------------------------------------------- +$ git branch -r + origin/HEAD -> origin/master + origin/master + staging/master + staging/staging-linus + staging/staging-next +------------------------------------------------- + +If you run `git fetch <remote>` later, the remote-tracking branches +for the named `<remote>` will be updated. + +If you examine the file `.git/config`, you will see that Git has added +a new stanza: + +------------------------------------------------- +$ cat .git/config +... +[remote "staging"] + url = git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/staging.git + fetch = +refs/heads/*:refs/remotes/staging/* +... +------------------------------------------------- + +This is what causes Git to track the remote's branches; you may modify +or delete these configuration options by editing `.git/config` with a +text editor. (See the "CONFIGURATION FILE" section of +linkgit:git-config[1] for details.) + +[[exploring-git-history]] +Exploring Git history +===================== + +Git is best thought of as a tool for storing the history of a +collection of files. It does this by storing compressed snapshots of +the contents of a file hierarchy, together with "commits" which show +the relationships between these snapshots. + +Git provides extremely flexible and fast tools for exploring the +history of a project. + +We start with one specialized tool that is useful for finding the +commit that introduced a bug into a project. + +[[using-bisect]] +How to use bisect to find a regression +-------------------------------------- + +Suppose version 2.6.18 of your project worked, but the version at +"master" crashes. Sometimes the best way to find the cause of such a +regression is to perform a brute-force search through the project's +history to find the particular commit that caused the problem. The +linkgit:git-bisect[1] command can help you do this: + +------------------------------------------------- +$ git bisect start +$ git bisect good v2.6.18 +$ git bisect bad master +Bisecting: 3537 revisions left to test after this +[65934a9a028b88e83e2b0f8b36618fe503349f8e] BLOCK: Make USB storage depend on SCSI rather than selecting it [try #6] +------------------------------------------------- + +If you run `git branch` at this point, you'll see that Git has +temporarily moved you in "(no branch)". HEAD is now detached from any +branch and points directly to a commit (with commit id 65934...) that +is reachable from "master" but not from v2.6.18. Compile and test it, +and see whether it crashes. Assume it does crash. Then: + +------------------------------------------------- +$ git bisect bad +Bisecting: 1769 revisions left to test after this +[7eff82c8b1511017ae605f0c99ac275a7e21b867] i2c-core: Drop useless bitmaskings +------------------------------------------------- + +checks out an older version. Continue like this, telling Git at each +stage whether the version it gives you is good or bad, and notice +that the number of revisions left to test is cut approximately in +half each time. + +After about 13 tests (in this case), it will output the commit id of +the guilty commit. You can then examine the commit with +linkgit:git-show[1], find out who wrote it, and mail them your bug +report with the commit id. Finally, run + +------------------------------------------------- +$ git bisect reset +------------------------------------------------- + +to return you to the branch you were on before. + +Note that the version which `git bisect` checks out for you at each +point is just a suggestion, and you're free to try a different +version if you think it would be a good idea. For example, +occasionally you may land on a commit that broke something unrelated; +run + +------------------------------------------------- +$ git bisect visualize +------------------------------------------------- + +which will run gitk and label the commit it chose with a marker that +says "bisect". Choose a safe-looking commit nearby, note its commit +id, and check it out with: + +------------------------------------------------- +$ git reset --hard fb47ddb2db... +------------------------------------------------- + +then test, run `bisect good` or `bisect bad` as appropriate, and +continue. + +Instead of `git bisect visualize` and then `git reset --hard +fb47ddb2db...`, you might just want to tell Git that you want to skip +the current commit: + +------------------------------------------------- +$ git bisect skip +------------------------------------------------- + +In this case, though, Git may not eventually be able to tell the first +bad one between some first skipped commits and a later bad commit. + +There are also ways to automate the bisecting process if you have a +test script that can tell a good from a bad commit. See +linkgit:git-bisect[1] for more information about this and other `git +bisect` features. + +[[naming-commits]] +Naming commits +-------------- + +We have seen several ways of naming commits already: + + - 40-hexdigit object name + - branch name: refers to the commit at the head of the given + branch + - tag name: refers to the commit pointed to by the given tag + (we've seen branches and tags are special cases of + <<how-git-stores-references,references>>). + - HEAD: refers to the head of the current branch + +There are many more; see the "SPECIFYING REVISIONS" section of the +linkgit:gitrevisions[7] man page for the complete list of ways to +name revisions. Some examples: + +------------------------------------------------- +$ git show fb47ddb2 # the first few characters of the object name + # are usually enough to specify it uniquely +$ git show HEAD^ # the parent of the HEAD commit +$ git show HEAD^^ # the grandparent +$ git show HEAD~4 # the great-great-grandparent +------------------------------------------------- + +Recall that merge commits may have more than one parent; by default, +`^` and `~` follow the first parent listed in the commit, but you can +also choose: + +------------------------------------------------- +$ git show HEAD^1 # show the first parent of HEAD +$ git show HEAD^2 # show the second parent of HEAD +------------------------------------------------- + +In addition to HEAD, there are several other special names for +commits: + +Merges (to be discussed later), as well as operations such as +`git reset`, which change the currently checked-out commit, generally +set ORIG_HEAD to the value HEAD had before the current operation. + +The `git fetch` operation always stores the head of the last fetched +branch in FETCH_HEAD. For example, if you run `git fetch` without +specifying a local branch as the target of the operation + +------------------------------------------------- +$ git fetch git://example.com/proj.git theirbranch +------------------------------------------------- + +the fetched commits will still be available from FETCH_HEAD. + +When we discuss merges we'll also see the special name MERGE_HEAD, +which refers to the other branch that we're merging in to the current +branch. + +The linkgit:git-rev-parse[1] command is a low-level command that is +occasionally useful for translating some name for a commit to the object +name for that commit: + +------------------------------------------------- +$ git rev-parse origin +e05db0fd4f31dde7005f075a84f96b360d05984b +------------------------------------------------- + +[[creating-tags]] +Creating tags +------------- + +We can also create a tag to refer to a particular commit; after +running + +------------------------------------------------- +$ git tag stable-1 1b2e1d63ff +------------------------------------------------- + +You can use `stable-1` to refer to the commit 1b2e1d63ff. + +This creates a "lightweight" tag. If you would also like to include a +comment with the tag, and possibly sign it cryptographically, then you +should create a tag object instead; see the linkgit:git-tag[1] man page +for details. + +[[browsing-revisions]] +Browsing revisions +------------------ + +The linkgit:git-log[1] command can show lists of commits. On its +own, it shows all commits reachable from the parent commit; but you +can also make more specific requests: + +------------------------------------------------- +$ git log v2.5.. # commits since (not reachable from) v2.5 +$ git log test..master # commits reachable from master but not test +$ git log master..test # ...reachable from test but not master +$ git log master...test # ...reachable from either test or master, + # but not both +$ git log --since="2 weeks ago" # commits from the last 2 weeks +$ git log Makefile # commits which modify Makefile +$ git log fs/ # ... which modify any file under fs/ +$ git log -S'foo()' # commits which add or remove any file data + # matching the string 'foo()' +------------------------------------------------- + +And of course you can combine all of these; the following finds +commits since v2.5 which touch the `Makefile` or any file under `fs`: + +------------------------------------------------- +$ git log v2.5.. Makefile fs/ +------------------------------------------------- + +You can also ask git log to show patches: + +------------------------------------------------- +$ git log -p +------------------------------------------------- + +See the `--pretty` option in the linkgit:git-log[1] man page for more +display options. + +Note that git log starts with the most recent commit and works +backwards through the parents; however, since Git history can contain +multiple independent lines of development, the particular order that +commits are listed in may be somewhat arbitrary. + +[[generating-diffs]] +Generating diffs +---------------- + +You can generate diffs between any two versions using +linkgit:git-diff[1]: + +------------------------------------------------- +$ git diff master..test +------------------------------------------------- + +That will produce the diff between the tips of the two branches. If +you'd prefer to find the diff from their common ancestor to test, you +can use three dots instead of two: + +------------------------------------------------- +$ git diff master...test +------------------------------------------------- + +Sometimes what you want instead is a set of patches; for this you can +use linkgit:git-format-patch[1]: + +------------------------------------------------- +$ git format-patch master..test +------------------------------------------------- + +will generate a file with a patch for each commit reachable from test +but not from master. + +[[viewing-old-file-versions]] +Viewing old file versions +------------------------- + +You can always view an old version of a file by just checking out the +correct revision first. But sometimes it is more convenient to be +able to view an old version of a single file without checking +anything out; this command does that: + +------------------------------------------------- +$ git show v2.5:fs/locks.c +------------------------------------------------- + +Before the colon may be anything that names a commit, and after it +may be any path to a file tracked by Git. + +[[history-examples]] +Examples +-------- + +[[counting-commits-on-a-branch]] +Counting the number of commits on a branch +~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ + +Suppose you want to know how many commits you've made on `mybranch` +since it diverged from `origin`: + +------------------------------------------------- +$ git log --pretty=oneline origin..mybranch | wc -l +------------------------------------------------- + +Alternatively, you may often see this sort of thing done with the +lower-level command linkgit:git-rev-list[1], which just lists the SHA-1's +of all the given commits: + +------------------------------------------------- +$ git rev-list origin..mybranch | wc -l +------------------------------------------------- + +[[checking-for-equal-branches]] +Check whether two branches point at the same history +~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ + +Suppose you want to check whether two branches point at the same point +in history. + +------------------------------------------------- +$ git diff origin..master +------------------------------------------------- + +will tell you whether the contents of the project are the same at the +two branches; in theory, however, it's possible that the same project +contents could have been arrived at by two different historical +routes. You could compare the object names: + +------------------------------------------------- +$ git rev-list origin +e05db0fd4f31dde7005f075a84f96b360d05984b +$ git rev-list master +e05db0fd4f31dde7005f075a84f96b360d05984b +------------------------------------------------- + +Or you could recall that the `...` operator selects all commits +reachable from either one reference or the other but not +both; so + +------------------------------------------------- +$ git log origin...master +------------------------------------------------- + +will return no commits when the two branches are equal. + +[[finding-tagged-descendants]] +Find first tagged version including a given fix +~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ + +Suppose you know that the commit e05db0fd fixed a certain problem. +You'd like to find the earliest tagged release that contains that +fix. + +Of course, there may be more than one answer--if the history branched +after commit e05db0fd, then there could be multiple "earliest" tagged +releases. + +You could just visually inspect the commits since e05db0fd: + +------------------------------------------------- +$ gitk e05db0fd.. +------------------------------------------------- + +or you can use linkgit:git-name-rev[1], which will give the commit a +name based on any tag it finds pointing to one of the commit's +descendants: + +------------------------------------------------- +$ git name-rev --tags e05db0fd +e05db0fd tags/v1.5.0-rc1^0~23 +------------------------------------------------- + +The linkgit:git-describe[1] command does the opposite, naming the +revision using a tag on which the given commit is based: + +------------------------------------------------- +$ git describe e05db0fd +v1.5.0-rc0-260-ge05db0f +------------------------------------------------- + +but that may sometimes help you guess which tags might come after the +given commit. + +If you just want to verify whether a given tagged version contains a +given commit, you could use linkgit:git-merge-base[1]: + +------------------------------------------------- +$ git merge-base e05db0fd v1.5.0-rc1 +e05db0fd4f31dde7005f075a84f96b360d05984b +------------------------------------------------- + +The merge-base command finds a common ancestor of the given commits, +and always returns one or the other in the case where one is a +descendant of the other; so the above output shows that e05db0fd +actually is an ancestor of v1.5.0-rc1. + +Alternatively, note that + +------------------------------------------------- +$ git log v1.5.0-rc1..e05db0fd +------------------------------------------------- + +will produce empty output if and only if v1.5.0-rc1 includes e05db0fd, +because it outputs only commits that are not reachable from v1.5.0-rc1. + +As yet another alternative, the linkgit:git-show-branch[1] command lists +the commits reachable from its arguments with a display on the left-hand +side that indicates which arguments that commit is reachable from. +So, if you run something like + +------------------------------------------------- +$ git show-branch e05db0fd v1.5.0-rc0 v1.5.0-rc1 v1.5.0-rc2 +! [e05db0fd] Fix warnings in sha1_file.c - use C99 printf format if +available + ! [v1.5.0-rc0] GIT v1.5.0 preview + ! [v1.5.0-rc1] GIT v1.5.0-rc1 + ! [v1.5.0-rc2] GIT v1.5.0-rc2 +... +------------------------------------------------- + +then a line like + +------------------------------------------------- ++ ++ [e05db0fd] Fix warnings in sha1_file.c - use C99 printf format if +available +------------------------------------------------- + +shows that e05db0fd is reachable from itself, from v1.5.0-rc1, +and from v1.5.0-rc2, and not from v1.5.0-rc0. + +[[showing-commits-unique-to-a-branch]] +Showing commits unique to a given branch +~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ + +Suppose you would like to see all the commits reachable from the branch +head named `master` but not from any other head in your repository. + +We can list all the heads in this repository with +linkgit:git-show-ref[1]: + +------------------------------------------------- +$ git show-ref --heads +bf62196b5e363d73353a9dcf094c59595f3153b7 refs/heads/core-tutorial +db768d5504c1bb46f63ee9d6e1772bd047e05bf9 refs/heads/maint +a07157ac624b2524a059a3414e99f6f44bebc1e7 refs/heads/master +24dbc180ea14dc1aebe09f14c8ecf32010690627 refs/heads/tutorial-2 +1e87486ae06626c2f31eaa63d26fc0fd646c8af2 refs/heads/tutorial-fixes +------------------------------------------------- + +We can get just the branch-head names, and remove `master`, with +the help of the standard utilities cut and grep: + +------------------------------------------------- +$ git show-ref --heads | cut -d' ' -f2 | grep -v '^refs/heads/master' +refs/heads/core-tutorial +refs/heads/maint +refs/heads/tutorial-2 +refs/heads/tutorial-fixes +------------------------------------------------- + +And then we can ask to see all the commits reachable from master +but not from these other heads: + +------------------------------------------------- +$ gitk master --not $( git show-ref --heads | cut -d' ' -f2 | + grep -v '^refs/heads/master' ) +------------------------------------------------- + +Obviously, endless variations are possible; for example, to see all +commits reachable from some head but not from any tag in the repository: + +------------------------------------------------- +$ gitk $( git show-ref --heads ) --not $( git show-ref --tags ) +------------------------------------------------- + +(See linkgit:gitrevisions[7] for explanations of commit-selecting +syntax such as `--not`.) + +[[making-a-release]] +Creating a changelog and tarball for a software release +~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ + +The linkgit:git-archive[1] command can create a tar or zip archive from +any version of a project; for example: + +------------------------------------------------- +$ git archive -o latest.tar.gz --prefix=project/ HEAD +------------------------------------------------- + +will use HEAD to produce a gzipped tar archive in which each filename +is preceded by `project/`. The output file format is inferred from +the output file extension if possible, see linkgit:git-archive[1] for +details. + +Versions of Git older than 1.7.7 don't know about the `tar.gz` format, +you'll need to use gzip explicitly: + +------------------------------------------------- +$ git archive --format=tar --prefix=project/ HEAD | gzip >latest.tar.gz +------------------------------------------------- + +If you're releasing a new version of a software project, you may want +to simultaneously make a changelog to include in the release +announcement. + +Linus Torvalds, for example, makes new kernel releases by tagging them, +then running: + +------------------------------------------------- +$ release-script 2.6.12 2.6.13-rc6 2.6.13-rc7 +------------------------------------------------- + +where release-script is a shell script that looks like: + +------------------------------------------------- +#!/bin/sh +stable="$1" +last="$2" +new="$3" +echo "# git tag v$new" +echo "git archive --prefix=linux-$new/ v$new | gzip -9 > ../linux-$new.tar.gz" +echo "git diff v$stable v$new | gzip -9 > ../patch-$new.gz" +echo "git log --no-merges v$new ^v$last > ../ChangeLog-$new" +echo "git shortlog --no-merges v$new ^v$last > ../ShortLog" +echo "git diff --stat --summary -M v$last v$new > ../diffstat-$new" +------------------------------------------------- + +and then he just cut-and-pastes the output commands after verifying that +they look OK. + +[[Finding-commits-With-given-Content]] +Finding commits referencing a file with given content +~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ + +Somebody hands you a copy of a file, and asks which commits modified a +file such that it contained the given content either before or after the +commit. You can find out with this: + +------------------------------------------------- +$ git log --raw --abbrev=40 --pretty=oneline | + grep -B 1 `git hash-object filename` +------------------------------------------------- + +Figuring out why this works is left as an exercise to the (advanced) +student. The linkgit:git-log[1], linkgit:git-diff-tree[1], and +linkgit:git-hash-object[1] man pages may prove helpful. + +[[Developing-With-git]] +Developing with Git +=================== + +[[telling-git-your-name]] +Telling Git your name +--------------------- + +Before creating any commits, you should introduce yourself to Git. +The easiest way to do so is to use linkgit:git-config[1]: + +------------------------------------------------ +$ git config --global user.name 'Your Name Comes Here' +$ git config --global user.email 'you@yourdomain.example.com' +------------------------------------------------ + +Which will add the following to a file named `.gitconfig` in your +home directory: + +------------------------------------------------ +[user] + name = Your Name Comes Here + email = you@yourdomain.example.com +------------------------------------------------ + +See the "CONFIGURATION FILE" section of linkgit:git-config[1] for +details on the configuration file. The file is plain text, so you can +also edit it with your favorite editor. + + +[[creating-a-new-repository]] +Creating a new repository +------------------------- + +Creating a new repository from scratch is very easy: + +------------------------------------------------- +$ mkdir project +$ cd project +$ git init +------------------------------------------------- + +If you have some initial content (say, a tarball): + +------------------------------------------------- +$ tar xzvf project.tar.gz +$ cd project +$ git init +$ git add . # include everything below ./ in the first commit: +$ git commit +------------------------------------------------- + +[[how-to-make-a-commit]] +How to make a commit +-------------------- + +Creating a new commit takes three steps: + + 1. Making some changes to the working directory using your + favorite editor. + 2. Telling Git about your changes. + 3. Creating the commit using the content you told Git about + in step 2. + +In practice, you can interleave and repeat steps 1 and 2 as many +times as you want: in order to keep track of what you want committed +at step 3, Git maintains a snapshot of the tree's contents in a +special staging area called "the index." + +At the beginning, the content of the index will be identical to +that of the HEAD. The command `git diff --cached`, which shows +the difference between the HEAD and the index, should therefore +produce no output at that point. + +Modifying the index is easy: + +To update the index with the contents of a new or modified file, use + +------------------------------------------------- +$ git add path/to/file +------------------------------------------------- + +To remove a file from the index and from the working tree, use + +------------------------------------------------- +$ git rm path/to/file +------------------------------------------------- + +After each step you can verify that + +------------------------------------------------- +$ git diff --cached +------------------------------------------------- + +always shows the difference between the HEAD and the index file--this +is what you'd commit if you created the commit now--and that + +------------------------------------------------- +$ git diff +------------------------------------------------- + +shows the difference between the working tree and the index file. + +Note that `git add` always adds just the current contents of a file +to the index; further changes to the same file will be ignored unless +you run `git add` on the file again. + +When you're ready, just run + +------------------------------------------------- +$ git commit +------------------------------------------------- + +and Git will prompt you for a commit message and then create the new +commit. Check to make sure it looks like what you expected with + +------------------------------------------------- +$ git show +------------------------------------------------- + +As a special shortcut, + +------------------------------------------------- +$ git commit -a +------------------------------------------------- + +will update the index with any files that you've modified or removed +and create a commit, all in one step. + +A number of commands are useful for keeping track of what you're +about to commit: + +------------------------------------------------- +$ git diff --cached # difference between HEAD and the index; what + # would be committed if you ran "commit" now. +$ git diff # difference between the index file and your + # working directory; changes that would not + # be included if you ran "commit" now. +$ git diff HEAD # difference between HEAD and working tree; what + # would be committed if you ran "commit -a" now. +$ git status # a brief per-file summary of the above. +------------------------------------------------- + +You can also use linkgit:git-gui[1] to create commits, view changes in +the index and the working tree files, and individually select diff hunks +for inclusion in the index (by right-clicking on the diff hunk and +choosing "Stage Hunk For Commit"). + +[[creating-good-commit-messages]] +Creating good commit messages +----------------------------- + +Though not required, it's a good idea to begin the commit message +with a single short (less than 50 character) line summarizing the +change, followed by a blank line and then a more thorough +description. The text up to the first blank line in a commit +message is treated as the commit title, and that title is used +throughout Git. For example, linkgit:git-format-patch[1] turns a +commit into email, and it uses the title on the Subject line and the +rest of the commit in the body. + + +[[ignoring-files]] +Ignoring files +-------------- + +A project will often generate files that you do 'not' want to track with Git. +This typically includes files generated by a build process or temporary +backup files made by your editor. Of course, 'not' tracking files with Git +is just a matter of 'not' calling `git add` on them. But it quickly becomes +annoying to have these untracked files lying around; e.g. they make +`git add .` practically useless, and they keep showing up in the output of +`git status`. + +You can tell Git to ignore certain files by creating a file called +`.gitignore` in the top level of your working directory, with contents +such as: + +------------------------------------------------- +# Lines starting with '#' are considered comments. +# Ignore any file named foo.txt. +foo.txt +# Ignore (generated) html files, +*.html +# except foo.html which is maintained by hand. +!foo.html +# Ignore objects and archives. +*.[oa] +------------------------------------------------- + +See linkgit:gitignore[5] for a detailed explanation of the syntax. You can +also place .gitignore files in other directories in your working tree, and they +will apply to those directories and their subdirectories. The `.gitignore` +files can be added to your repository like any other files (just run `git add +.gitignore` and `git commit`, as usual), which is convenient when the exclude +patterns (such as patterns matching build output files) would also make sense +for other users who clone your repository. + +If you wish the exclude patterns to affect only certain repositories +(instead of every repository for a given project), you may instead put +them in a file in your repository named `.git/info/exclude`, or in any +file specified by the `core.excludesFile` configuration variable. +Some Git commands can also take exclude patterns directly on the +command line. See linkgit:gitignore[5] for the details. + +[[how-to-merge]] +How to merge +------------ + +You can rejoin two diverging branches of development using +linkgit:git-merge[1]: + +------------------------------------------------- +$ git merge branchname +------------------------------------------------- + +merges the development in the branch `branchname` into the current +branch. + +A merge is made by combining the changes made in `branchname` and the +changes made up to the latest commit in your current branch since +their histories forked. The work tree is overwritten by the result of +the merge when this combining is done cleanly, or overwritten by a +half-merged results when this combining results in conflicts. +Therefore, if you have uncommitted changes touching the same files as +the ones impacted by the merge, Git will refuse to proceed. Most of +the time, you will want to commit your changes before you can merge, +and if you don't, then linkgit:git-stash[1] can take these changes +away while you're doing the merge, and reapply them afterwards. + +If the changes are independent enough, Git will automatically complete +the merge and commit the result (or reuse an existing commit in case +of <<fast-forwards,fast-forward>>, see below). On the other hand, +if there are conflicts--for example, if the same file is +modified in two different ways in the remote branch and the local +branch--then you are warned; the output may look something like this: + +------------------------------------------------- +$ git merge next + 100% (4/4) done +Auto-merged file.txt +CONFLICT (content): Merge conflict in file.txt +Automatic merge failed; fix conflicts and then commit the result. +------------------------------------------------- + +Conflict markers are left in the problematic files, and after +you resolve the conflicts manually, you can update the index +with the contents and run Git commit, as you normally would when +creating a new file. + +If you examine the resulting commit using gitk, you will see that it +has two parents, one pointing to the top of the current branch, and +one to the top of the other branch. + +[[resolving-a-merge]] +Resolving a merge +----------------- + +When a merge isn't resolved automatically, Git leaves the index and +the working tree in a special state that gives you all the +information you need to help resolve the merge. + +Files with conflicts are marked specially in the index, so until you +resolve the problem and update the index, linkgit:git-commit[1] will +fail: + +------------------------------------------------- +$ git commit +file.txt: needs merge +------------------------------------------------- + +Also, linkgit:git-status[1] will list those files as "unmerged", and the +files with conflicts will have conflict markers added, like this: + +------------------------------------------------- +<<<<<<< HEAD:file.txt +Hello world +======= +Goodbye +>>>>>>> 77976da35a11db4580b80ae27e8d65caf5208086:file.txt +------------------------------------------------- + +All you need to do is edit the files to resolve the conflicts, and then + +------------------------------------------------- +$ git add file.txt +$ git commit +------------------------------------------------- + +Note that the commit message will already be filled in for you with +some information about the merge. Normally you can just use this +default message unchanged, but you may add additional commentary of +your own if desired. + +The above is all you need to know to resolve a simple merge. But Git +also provides more information to help resolve conflicts: + +[[conflict-resolution]] +Getting conflict-resolution help during a merge +~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ + +All of the changes that Git was able to merge automatically are +already added to the index file, so linkgit:git-diff[1] shows only +the conflicts. It uses an unusual syntax: + +------------------------------------------------- +$ git diff +diff --cc file.txt +index 802992c,2b60207..0000000 +--- a/file.txt ++++ b/file.txt +@@@ -1,1 -1,1 +1,5 @@@ +++<<<<<<< HEAD:file.txt + +Hello world +++======= ++ Goodbye +++>>>>>>> 77976da35a11db4580b80ae27e8d65caf5208086:file.txt +------------------------------------------------- + +Recall that the commit which will be committed after we resolve this +conflict will have two parents instead of the usual one: one parent +will be HEAD, the tip of the current branch; the other will be the +tip of the other branch, which is stored temporarily in MERGE_HEAD. + +During the merge, the index holds three versions of each file. Each of +these three "file stages" represents a different version of the file: + +------------------------------------------------- +$ git show :1:file.txt # the file in a common ancestor of both branches +$ git show :2:file.txt # the version from HEAD. +$ git show :3:file.txt # the version from MERGE_HEAD. +------------------------------------------------- + +When you ask linkgit:git-diff[1] to show the conflicts, it runs a +three-way diff between the conflicted merge results in the work tree with +stages 2 and 3 to show only hunks whose contents come from both sides, +mixed (in other words, when a hunk's merge results come only from stage 2, +that part is not conflicting and is not shown. Same for stage 3). + +The diff above shows the differences between the working-tree version of +file.txt and the stage 2 and stage 3 versions. So instead of preceding +each line by a single `+` or `-`, it now uses two columns: the first +column is used for differences between the first parent and the working +directory copy, and the second for differences between the second parent +and the working directory copy. (See the "COMBINED DIFF FORMAT" section +of linkgit:git-diff-files[1] for a details of the format.) + +After resolving the conflict in the obvious way (but before updating the +index), the diff will look like: + +------------------------------------------------- +$ git diff +diff --cc file.txt +index 802992c,2b60207..0000000 +--- a/file.txt ++++ b/file.txt +@@@ -1,1 -1,1 +1,1 @@@ +- Hello world + -Goodbye +++Goodbye world +------------------------------------------------- + +This shows that our resolved version deleted "Hello world" from the +first parent, deleted "Goodbye" from the second parent, and added +"Goodbye world", which was previously absent from both. + +Some special diff options allow diffing the working directory against +any of these stages: + +------------------------------------------------- +$ git diff -1 file.txt # diff against stage 1 +$ git diff --base file.txt # same as the above +$ git diff -2 file.txt # diff against stage 2 +$ git diff --ours file.txt # same as the above +$ git diff -3 file.txt # diff against stage 3 +$ git diff --theirs file.txt # same as the above. +------------------------------------------------- + +The linkgit:git-log[1] and linkgit:gitk[1] commands also provide special help +for merges: + +------------------------------------------------- +$ git log --merge +$ gitk --merge +------------------------------------------------- + +These will display all commits which exist only on HEAD or on +MERGE_HEAD, and which touch an unmerged file. + +You may also use linkgit:git-mergetool[1], which lets you merge the +unmerged files using external tools such as Emacs or kdiff3. + +Each time you resolve the conflicts in a file and update the index: + +------------------------------------------------- +$ git add file.txt +------------------------------------------------- + +the different stages of that file will be "collapsed", after which +`git diff` will (by default) no longer show diffs for that file. + +[[undoing-a-merge]] +Undoing a merge +--------------- + +If you get stuck and decide to just give up and throw the whole mess +away, you can always return to the pre-merge state with + +------------------------------------------------- +$ git reset --hard HEAD +------------------------------------------------- + +Or, if you've already committed the merge that you want to throw away, + +------------------------------------------------- +$ git reset --hard ORIG_HEAD +------------------------------------------------- + +However, this last command can be dangerous in some cases--never +throw away a commit you have already committed if that commit may +itself have been merged into another branch, as doing so may confuse +further merges. + +[[fast-forwards]] +Fast-forward merges +------------------- + +There is one special case not mentioned above, which is treated +differently. Normally, a merge results in a merge commit, with two +parents, one pointing at each of the two lines of development that +were merged. + +However, if the current branch is an ancestor of the other--so every commit +present in the current branch is already contained in the other branch--then Git +just performs a "fast-forward"; the head of the current branch is moved forward +to point at the head of the merged-in branch, without any new commits being +created. + +[[fixing-mistakes]] +Fixing mistakes +--------------- + +If you've messed up the working tree, but haven't yet committed your +mistake, you can return the entire working tree to the last committed +state with + +------------------------------------------------- +$ git reset --hard HEAD +------------------------------------------------- + +If you make a commit that you later wish you hadn't, there are two +fundamentally different ways to fix the problem: + + 1. You can create a new commit that undoes whatever was done + by the old commit. This is the correct thing if your + mistake has already been made public. + + 2. You can go back and modify the old commit. You should + never do this if you have already made the history public; + Git does not normally expect the "history" of a project to + change, and cannot correctly perform repeated merges from + a branch that has had its history changed. + +[[reverting-a-commit]] +Fixing a mistake with a new commit +~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ + +Creating a new commit that reverts an earlier change is very easy; +just pass the linkgit:git-revert[1] command a reference to the bad +commit; for example, to revert the most recent commit: + +------------------------------------------------- +$ git revert HEAD +------------------------------------------------- + +This will create a new commit which undoes the change in HEAD. You +will be given a chance to edit the commit message for the new commit. + +You can also revert an earlier change, for example, the next-to-last: + +------------------------------------------------- +$ git revert HEAD^ +------------------------------------------------- + +In this case Git will attempt to undo the old change while leaving +intact any changes made since then. If more recent changes overlap +with the changes to be reverted, then you will be asked to fix +conflicts manually, just as in the case of <<resolving-a-merge, +resolving a merge>>. + +[[fixing-a-mistake-by-rewriting-history]] +Fixing a mistake by rewriting history +~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ + +If the problematic commit is the most recent commit, and you have not +yet made that commit public, then you may just +<<undoing-a-merge,destroy it using `git reset`>>. + +Alternatively, you +can edit the working directory and update the index to fix your +mistake, just as if you were going to <<how-to-make-a-commit,create a +new commit>>, then run + +------------------------------------------------- +$ git commit --amend +------------------------------------------------- + +which will replace the old commit by a new commit incorporating your +changes, giving you a chance to edit the old commit message first. + +Again, you should never do this to a commit that may already have +been merged into another branch; use linkgit:git-revert[1] instead in +that case. + +It is also possible to replace commits further back in the history, but +this is an advanced topic to be left for +<<cleaning-up-history,another chapter>>. + +[[checkout-of-path]] +Checking out an old version of a file +~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ + +In the process of undoing a previous bad change, you may find it +useful to check out an older version of a particular file using +linkgit:git-checkout[1]. We've used `git checkout` before to switch +branches, but it has quite different behavior if it is given a path +name: the command + +------------------------------------------------- +$ git checkout HEAD^ path/to/file +------------------------------------------------- + +replaces path/to/file by the contents it had in the commit HEAD^, and +also updates the index to match. It does not change branches. + +If you just want to look at an old version of the file, without +modifying the working directory, you can do that with +linkgit:git-show[1]: + +------------------------------------------------- +$ git show HEAD^:path/to/file +------------------------------------------------- + +which will display the given version of the file. + +[[interrupted-work]] +Temporarily setting aside work in progress +~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ + +While you are in the middle of working on something complicated, you +find an unrelated but obvious and trivial bug. You would like to fix it +before continuing. You can use linkgit:git-stash[1] to save the current +state of your work, and after fixing the bug (or, optionally after doing +so on a different branch and then coming back), unstash the +work-in-progress changes. + +------------------------------------------------ +$ git stash save "work in progress for foo feature" +------------------------------------------------ + +This command will save your changes away to the `stash`, and +reset your working tree and the index to match the tip of your +current branch. Then you can make your fix as usual. + +------------------------------------------------ +... edit and test ... +$ git commit -a -m "blorpl: typofix" +------------------------------------------------ + +After that, you can go back to what you were working on with +`git stash pop`: + +------------------------------------------------ +$ git stash pop +------------------------------------------------ + + +[[ensuring-good-performance]] +Ensuring good performance +------------------------- + +On large repositories, Git depends on compression to keep the history +information from taking up too much space on disk or in memory. Some +Git commands may automatically run linkgit:git-gc[1], so you don't +have to worry about running it manually. However, compressing a large +repository may take a while, so you may want to call `gc` explicitly +to avoid automatic compression kicking in when it is not convenient. + + +[[ensuring-reliability]] +Ensuring reliability +-------------------- + +[[checking-for-corruption]] +Checking the repository for corruption +~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ + +The linkgit:git-fsck[1] command runs a number of self-consistency checks +on the repository, and reports on any problems. This may take some +time. + +------------------------------------------------- +$ git fsck +dangling commit 7281251ddd2a61e38657c827739c57015671a6b3 +dangling commit 2706a059f258c6b245f298dc4ff2ccd30ec21a63 +dangling commit 13472b7c4b80851a1bc551779171dcb03655e9b5 +dangling blob 218761f9d90712d37a9c5e36f406f92202db07eb +dangling commit bf093535a34a4d35731aa2bd90fe6b176302f14f +dangling commit 8e4bec7f2ddaa268bef999853c25755452100f8e +dangling tree d50bb86186bf27b681d25af89d3b5b68382e4085 +dangling tree b24c2473f1fd3d91352a624795be026d64c8841f +... +------------------------------------------------- + +You will see informational messages on dangling objects. They are objects +that still exist in the repository but are no longer referenced by any of +your branches, and can (and will) be removed after a while with `gc`. +You can run `git fsck --no-dangling` to suppress these messages, and still +view real errors. + +[[recovering-lost-changes]] +Recovering lost changes +~~~~~~~~~~~~~~~~~~~~~~~ + +[[reflogs]] +Reflogs +^^^^^^^ + +Say you modify a branch with <<fixing-mistakes,`git reset --hard`>>, +and then realize that the branch was the only reference you had to +that point in history. + +Fortunately, Git also keeps a log, called a "reflog", of all the +previous values of each branch. So in this case you can still find the +old history using, for example, + +------------------------------------------------- +$ git log master@{1} +------------------------------------------------- + +This lists the commits reachable from the previous version of the +`master` branch head. This syntax can be used with any Git command +that accepts a commit, not just with `git log`. Some other examples: + +------------------------------------------------- +$ git show master@{2} # See where the branch pointed 2, +$ git show master@{3} # 3, ... changes ago. +$ gitk master@{yesterday} # See where it pointed yesterday, +$ gitk master@{"1 week ago"} # ... or last week +$ git log --walk-reflogs master # show reflog entries for master +------------------------------------------------- + +A separate reflog is kept for the HEAD, so + +------------------------------------------------- +$ git show HEAD@{"1 week ago"} +------------------------------------------------- + +will show what HEAD pointed to one week ago, not what the current branch +pointed to one week ago. This allows you to see the history of what +you've checked out. + +The reflogs are kept by default for 30 days, after which they may be +pruned. See linkgit:git-reflog[1] and linkgit:git-gc[1] to learn +how to control this pruning, and see the "SPECIFYING REVISIONS" +section of linkgit:gitrevisions[7] for details. + +Note that the reflog history is very different from normal Git history. +While normal history is shared by every repository that works on the +same project, the reflog history is not shared: it tells you only about +how the branches in your local repository have changed over time. + +[[dangling-object-recovery]] +Examining dangling objects +^^^^^^^^^^^^^^^^^^^^^^^^^^ + +In some situations the reflog may not be able to save you. For example, +suppose you delete a branch, then realize you need the history it +contained. The reflog is also deleted; however, if you have not yet +pruned the repository, then you may still be able to find the lost +commits in the dangling objects that `git fsck` reports. See +<<dangling-objects>> for the details. + +------------------------------------------------- +$ git fsck +dangling commit 7281251ddd2a61e38657c827739c57015671a6b3 +dangling commit 2706a059f258c6b245f298dc4ff2ccd30ec21a63 +dangling commit 13472b7c4b80851a1bc551779171dcb03655e9b5 +... +------------------------------------------------- + +You can examine +one of those dangling commits with, for example, + +------------------------------------------------ +$ gitk 7281251ddd --not --all +------------------------------------------------ + +which does what it sounds like: it says that you want to see the commit +history that is described by the dangling commit(s), but not the +history that is described by all your existing branches and tags. Thus +you get exactly the history reachable from that commit that is lost. +(And notice that it might not be just one commit: we only report the +"tip of the line" as being dangling, but there might be a whole deep +and complex commit history that was dropped.) + +If you decide you want the history back, you can always create a new +reference pointing to it, for example, a new branch: + +------------------------------------------------ +$ git branch recovered-branch 7281251ddd +------------------------------------------------ + +Other types of dangling objects (blobs and trees) are also possible, and +dangling objects can arise in other situations. + + +[[sharing-development]] +Sharing development with others +=============================== + +[[getting-updates-With-git-pull]] +Getting updates with git pull +----------------------------- + +After you clone a repository and commit a few changes of your own, you +may wish to check the original repository for updates and merge them +into your own work. + +We have already seen <<Updating-a-repository-With-git-fetch,how to +keep remote-tracking branches up to date>> with linkgit:git-fetch[1], +and how to merge two branches. So you can merge in changes from the +original repository's master branch with: + +------------------------------------------------- +$ git fetch +$ git merge origin/master +------------------------------------------------- + +However, the linkgit:git-pull[1] command provides a way to do this in +one step: + +------------------------------------------------- +$ git pull origin master +------------------------------------------------- + +In fact, if you have `master` checked out, then this branch has been +configured by `git clone` to get changes from the HEAD branch of the +origin repository. So often you can +accomplish the above with just a simple + +------------------------------------------------- +$ git pull +------------------------------------------------- + +This command will fetch changes from the remote branches to your +remote-tracking branches `origin/*`, and merge the default branch into +the current branch. + +More generally, a branch that is created from a remote-tracking branch +will pull +by default from that branch. See the descriptions of the +`branch.<name>.remote` and `branch.<name>.merge` options in +linkgit:git-config[1], and the discussion of the `--track` option in +linkgit:git-checkout[1], to learn how to control these defaults. + +In addition to saving you keystrokes, `git pull` also helps you by +producing a default commit message documenting the branch and +repository that you pulled from. + +(But note that no such commit will be created in the case of a +<<fast-forwards,fast-forward>>; instead, your branch will just be +updated to point to the latest commit from the upstream branch.) + +The `git pull` command can also be given `.` as the "remote" repository, +in which case it just merges in a branch from the current repository; so +the commands + +------------------------------------------------- +$ git pull . branch +$ git merge branch +------------------------------------------------- + +are roughly equivalent. + +[[submitting-patches]] +Submitting patches to a project +------------------------------- + +If you just have a few changes, the simplest way to submit them may +just be to send them as patches in email: + +First, use linkgit:git-format-patch[1]; for example: + +------------------------------------------------- +$ git format-patch origin +------------------------------------------------- + +will produce a numbered series of files in the current directory, one +for each patch in the current branch but not in `origin/HEAD`. + +`git format-patch` can include an initial "cover letter". You can insert +commentary on individual patches after the three dash line which +`format-patch` places after the commit message but before the patch +itself. If you use `git notes` to track your cover letter material, +`git format-patch --notes` will include the commit's notes in a similar +manner. + +You can then import these into your mail client and send them by +hand. However, if you have a lot to send at once, you may prefer to +use the linkgit:git-send-email[1] script to automate the process. +Consult the mailing list for your project first to determine +their requirements for submitting patches. + +[[importing-patches]] +Importing patches to a project +------------------------------ + +Git also provides a tool called linkgit:git-am[1] (am stands for +"apply mailbox"), for importing such an emailed series of patches. +Just save all of the patch-containing messages, in order, into a +single mailbox file, say `patches.mbox`, then run + +------------------------------------------------- +$ git am -3 patches.mbox +------------------------------------------------- + +Git will apply each patch in order; if any conflicts are found, it +will stop, and you can fix the conflicts as described in +"<<resolving-a-merge,Resolving a merge>>". (The `-3` option tells +Git to perform a merge; if you would prefer it just to abort and +leave your tree and index untouched, you may omit that option.) + +Once the index is updated with the results of the conflict +resolution, instead of creating a new commit, just run + +------------------------------------------------- +$ git am --continue +------------------------------------------------- + +and Git will create the commit for you and continue applying the +remaining patches from the mailbox. + +The final result will be a series of commits, one for each patch in +the original mailbox, with authorship and commit log message each +taken from the message containing each patch. + +[[public-repositories]] +Public Git repositories +----------------------- + +Another way to submit changes to a project is to tell the maintainer +of that project to pull the changes from your repository using +linkgit:git-pull[1]. In the section "<<getting-updates-With-git-pull, +Getting updates with `git pull`>>" we described this as a way to get +updates from the "main" repository, but it works just as well in the +other direction. + +If you and the maintainer both have accounts on the same machine, then +you can just pull changes from each other's repositories directly; +commands that accept repository URLs as arguments will also accept a +local directory name: + +------------------------------------------------- +$ git clone /path/to/repository +$ git pull /path/to/other/repository +------------------------------------------------- + +or an ssh URL: + +------------------------------------------------- +$ git clone ssh://yourhost/~you/repository +------------------------------------------------- + +For projects with few developers, or for synchronizing a few private +repositories, this may be all you need. + +However, the more common way to do this is to maintain a separate public +repository (usually on a different host) for others to pull changes +from. This is usually more convenient, and allows you to cleanly +separate private work in progress from publicly visible work. + +You will continue to do your day-to-day work in your personal +repository, but periodically "push" changes from your personal +repository into your public repository, allowing other developers to +pull from that repository. So the flow of changes, in a situation +where there is one other developer with a public repository, looks +like this: + + you push + your personal repo ------------------> your public repo + ^ | + | | + | you pull | they pull + | | + | | + | they push V + their public repo <------------------- their repo + +We explain how to do this in the following sections. + +[[setting-up-a-public-repository]] +Setting up a public repository +~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ + +Assume your personal repository is in the directory `~/proj`. We +first create a new clone of the repository and tell `git daemon` that it +is meant to be public: + +------------------------------------------------- +$ git clone --bare ~/proj proj.git +$ touch proj.git/git-daemon-export-ok +------------------------------------------------- + +The resulting directory proj.git contains a "bare" git repository--it is +just the contents of the `.git` directory, without any files checked out +around it. + +Next, copy `proj.git` to the server where you plan to host the +public repository. You can use scp, rsync, or whatever is most +convenient. + +[[exporting-via-git]] +Exporting a Git repository via the Git protocol +~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ + +This is the preferred method. + +If someone else administers the server, they should tell you what +directory to put the repository in, and what `git://` URL it will +appear at. You can then skip to the section +"<<pushing-changes-to-a-public-repository,Pushing changes to a public +repository>>", below. + +Otherwise, all you need to do is start linkgit:git-daemon[1]; it will +listen on port 9418. By default, it will allow access to any directory +that looks like a Git directory and contains the magic file +git-daemon-export-ok. Passing some directory paths as `git daemon` +arguments will further restrict the exports to those paths. + +You can also run `git daemon` as an inetd service; see the +linkgit:git-daemon[1] man page for details. (See especially the +examples section.) + +[[exporting-via-http]] +Exporting a git repository via HTTP +~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ + +The Git protocol gives better performance and reliability, but on a +host with a web server set up, HTTP exports may be simpler to set up. + +All you need to do is place the newly created bare Git repository in +a directory that is exported by the web server, and make some +adjustments to give web clients some extra information they need: + +------------------------------------------------- +$ mv proj.git /home/you/public_html/proj.git +$ cd proj.git +$ git --bare update-server-info +$ mv hooks/post-update.sample hooks/post-update +------------------------------------------------- + +(For an explanation of the last two lines, see +linkgit:git-update-server-info[1] and linkgit:githooks[5].) + +Advertise the URL of `proj.git`. Anybody else should then be able to +clone or pull from that URL, for example with a command line like: + +------------------------------------------------- +$ git clone http://yourserver.com/~you/proj.git +------------------------------------------------- + +(See also +link:howto/setup-git-server-over-http.html[setup-git-server-over-http] +for a slightly more sophisticated setup using WebDAV which also +allows pushing over HTTP.) + +[[pushing-changes-to-a-public-repository]] +Pushing changes to a public repository +~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ + +Note that the two techniques outlined above (exporting via +<<exporting-via-http,http>> or <<exporting-via-git,git>>) allow other +maintainers to fetch your latest changes, but they do not allow write +access, which you will need to update the public repository with the +latest changes created in your private repository. + +The simplest way to do this is using linkgit:git-push[1] and ssh; to +update the remote branch named `master` with the latest state of your +branch named `master`, run + +------------------------------------------------- +$ git push ssh://yourserver.com/~you/proj.git master:master +------------------------------------------------- + +or just + +------------------------------------------------- +$ git push ssh://yourserver.com/~you/proj.git master +------------------------------------------------- + +As with `git fetch`, `git push` will complain if this does not result in a +<<fast-forwards,fast-forward>>; see the following section for details on +handling this case. + +Note that the target of a `push` is normally a +<<def_bare_repository,bare>> repository. You can also push to a +repository that has a checked-out working tree, but a push to update the +currently checked-out branch is denied by default to prevent confusion. +See the description of the receive.denyCurrentBranch option +in linkgit:git-config[1] for details. + +As with `git fetch`, you may also set up configuration options to +save typing; so, for example: + +------------------------------------------------- +$ git remote add public-repo ssh://yourserver.com/~you/proj.git +------------------------------------------------- + +adds the following to `.git/config`: + +------------------------------------------------- +[remote "public-repo"] + url = yourserver.com:proj.git + fetch = +refs/heads/*:refs/remotes/example/* +------------------------------------------------- + +which lets you do the same push with just + +------------------------------------------------- +$ git push public-repo master +------------------------------------------------- + +See the explanations of the `remote.<name>.url`, +`branch.<name>.remote`, and `remote.<name>.push` options in +linkgit:git-config[1] for details. + +[[forcing-push]] +What to do when a push fails +~~~~~~~~~~~~~~~~~~~~~~~~~~~~ + +If a push would not result in a <<fast-forwards,fast-forward>> of the +remote branch, then it will fail with an error like: + +------------------------------------------------- +error: remote 'refs/heads/master' is not an ancestor of + local 'refs/heads/master'. + Maybe you are not up-to-date and need to pull first? +error: failed to push to 'ssh://yourserver.com/~you/proj.git' +------------------------------------------------- + +This can happen, for example, if you: + + - use `git reset --hard` to remove already-published commits, or + - use `git commit --amend` to replace already-published commits + (as in <<fixing-a-mistake-by-rewriting-history>>), or + - use `git rebase` to rebase any already-published commits (as + in <<using-git-rebase>>). + +You may force `git push` to perform the update anyway by preceding the +branch name with a plus sign: + +------------------------------------------------- +$ git push ssh://yourserver.com/~you/proj.git +master +------------------------------------------------- + +Note the addition of the `+` sign. Alternatively, you can use the +`-f` flag to force the remote update, as in: + +------------------------------------------------- +$ git push -f ssh://yourserver.com/~you/proj.git master +------------------------------------------------- + +Normally whenever a branch head in a public repository is modified, it +is modified to point to a descendant of the commit that it pointed to +before. By forcing a push in this situation, you break that convention. +(See <<problems-With-rewriting-history>>.) + +Nevertheless, this is a common practice for people that need a simple +way to publish a work-in-progress patch series, and it is an acceptable +compromise as long as you warn other developers that this is how you +intend to manage the branch. + +It's also possible for a push to fail in this way when other people have +the right to push to the same repository. In that case, the correct +solution is to retry the push after first updating your work: either by a +pull, or by a fetch followed by a rebase; see the +<<setting-up-a-shared-repository,next section>> and +linkgit:gitcvs-migration[7] for more. + +[[setting-up-a-shared-repository]] +Setting up a shared repository +~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ + +Another way to collaborate is by using a model similar to that +commonly used in CVS, where several developers with special rights +all push to and pull from a single shared repository. See +linkgit:gitcvs-migration[7] for instructions on how to +set this up. + +However, while there is nothing wrong with Git's support for shared +repositories, this mode of operation is not generally recommended, +simply because the mode of collaboration that Git supports--by +exchanging patches and pulling from public repositories--has so many +advantages over the central shared repository: + + - Git's ability to quickly import and merge patches allows a + single maintainer to process incoming changes even at very + high rates. And when that becomes too much, `git pull` provides + an easy way for that maintainer to delegate this job to other + maintainers while still allowing optional review of incoming + changes. + - Since every developer's repository has the same complete copy + of the project history, no repository is special, and it is + trivial for another developer to take over maintenance of a + project, either by mutual agreement, or because a maintainer + becomes unresponsive or difficult to work with. + - The lack of a central group of "committers" means there is + less need for formal decisions about who is "in" and who is + "out". + +[[setting-up-gitweb]] +Allowing web browsing of a repository +~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ + +The gitweb cgi script provides users an easy way to browse your +project's revisions, file contents and logs without having to install +Git. Features like RSS/Atom feeds and blame/annotation details may +optionally be enabled. + +The linkgit:git-instaweb[1] command provides a simple way to start +browsing the repository using gitweb. The default server when using +instaweb is lighttpd. + +See the file gitweb/INSTALL in the Git source tree and +linkgit:gitweb[1] for instructions on details setting up a permanent +installation with a CGI or Perl capable server. + +[[how-to-get-a-git-repository-with-minimal-history]] +How to get a Git repository with minimal history +------------------------------------------------ + +A <<def_shallow_clone,shallow clone>>, with its truncated +history, is useful when one is interested only in recent history +of a project and getting full history from the upstream is +expensive. + +A <<def_shallow_clone,shallow clone>> is created by specifying +the linkgit:git-clone[1] `--depth` switch. The depth can later be +changed with the linkgit:git-fetch[1] `--depth` switch, or full +history restored with `--unshallow`. + +Merging inside a <<def_shallow_clone,shallow clone>> will work as long +as a merge base is in the recent history. +Otherwise, it will be like merging unrelated histories and may +have to result in huge conflicts. This limitation may make such +a repository unsuitable to be used in merge based workflows. + +[[sharing-development-examples]] +Examples +-------- + +[[maintaining-topic-branches]] +Maintaining topic branches for a Linux subsystem maintainer +~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ + +This describes how Tony Luck uses Git in his role as maintainer of the +IA64 architecture for the Linux kernel. + +He uses two public branches: + + - A "test" tree into which patches are initially placed so that they + can get some exposure when integrated with other ongoing development. + This tree is available to Andrew for pulling into -mm whenever he + wants. + + - A "release" tree into which tested patches are moved for final sanity + checking, and as a vehicle to send them upstream to Linus (by sending + him a "please pull" request.) + +He also uses a set of temporary branches ("topic branches"), each +containing a logical grouping of patches. + +To set this up, first create your work tree by cloning Linus's public +tree: + +------------------------------------------------- +$ git clone git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git work +$ cd work +------------------------------------------------- + +Linus's tree will be stored in the remote-tracking branch named origin/master, +and can be updated using linkgit:git-fetch[1]; you can track other +public trees using linkgit:git-remote[1] to set up a "remote" and +linkgit:git-fetch[1] to keep them up-to-date; see +<<repositories-and-branches>>. + +Now create the branches in which you are going to work; these start out +at the current tip of origin/master branch, and should be set up (using +the `--track` option to linkgit:git-branch[1]) to merge changes in from +Linus by default. + +------------------------------------------------- +$ git branch --track test origin/master +$ git branch --track release origin/master +------------------------------------------------- + +These can be easily kept up to date using linkgit:git-pull[1]. + +------------------------------------------------- +$ git checkout test && git pull +$ git checkout release && git pull +------------------------------------------------- + +Important note! If you have any local changes in these branches, then +this merge will create a commit object in the history (with no local +changes Git will simply do a "fast-forward" merge). Many people dislike +the "noise" that this creates in the Linux history, so you should avoid +doing this capriciously in the `release` branch, as these noisy commits +will become part of the permanent history when you ask Linus to pull +from the release branch. + +A few configuration variables (see linkgit:git-config[1]) can +make it easy to push both branches to your public tree. (See +<<setting-up-a-public-repository>>.) + +------------------------------------------------- +$ cat >> .git/config <<EOF +[remote "mytree"] + url = master.kernel.org:/pub/scm/linux/kernel/git/aegl/linux.git + push = release + push = test +EOF +------------------------------------------------- + +Then you can push both the test and release trees using +linkgit:git-push[1]: + +------------------------------------------------- +$ git push mytree +------------------------------------------------- + +or push just one of the test and release branches using: + +------------------------------------------------- +$ git push mytree test +------------------------------------------------- + +or + +------------------------------------------------- +$ git push mytree release +------------------------------------------------- + +Now to apply some patches from the community. Think of a short +snappy name for a branch to hold this patch (or related group of +patches), and create a new branch from a recent stable tag of +Linus's branch. Picking a stable base for your branch will: +1) help you: by avoiding inclusion of unrelated and perhaps lightly +tested changes +2) help future bug hunters that use `git bisect` to find problems + +------------------------------------------------- +$ git checkout -b speed-up-spinlocks v2.6.35 +------------------------------------------------- + +Now you apply the patch(es), run some tests, and commit the change(s). If +the patch is a multi-part series, then you should apply each as a separate +commit to this branch. + +------------------------------------------------- +$ ... patch ... test ... commit [ ... patch ... test ... commit ]* +------------------------------------------------- + +When you are happy with the state of this change, you can merge it into the +"test" branch in preparation to make it public: + +------------------------------------------------- +$ git checkout test && git merge speed-up-spinlocks +------------------------------------------------- + +It is unlikely that you would have any conflicts here ... but you might if you +spent a while on this step and had also pulled new versions from upstream. + +Sometime later when enough time has passed and testing done, you can pull the +same branch into the `release` tree ready to go upstream. This is where you +see the value of keeping each patch (or patch series) in its own branch. It +means that the patches can be moved into the `release` tree in any order. + +------------------------------------------------- +$ git checkout release && git merge speed-up-spinlocks +------------------------------------------------- + +After a while, you will have a number of branches, and despite the +well chosen names you picked for each of them, you may forget what +they are for, or what status they are in. To get a reminder of what +changes are in a specific branch, use: + +------------------------------------------------- +$ git log linux..branchname | git shortlog +------------------------------------------------- + +To see whether it has already been merged into the test or release branches, +use: + +------------------------------------------------- +$ git log test..branchname +------------------------------------------------- + +or + +------------------------------------------------- +$ git log release..branchname +------------------------------------------------- + +(If this branch has not yet been merged, you will see some log entries. +If it has been merged, then there will be no output.) + +Once a patch completes the great cycle (moving from test to release, +then pulled by Linus, and finally coming back into your local +`origin/master` branch), the branch for this change is no longer needed. +You detect this when the output from: + +------------------------------------------------- +$ git log origin..branchname +------------------------------------------------- + +is empty. At this point the branch can be deleted: + +------------------------------------------------- +$ git branch -d branchname +------------------------------------------------- + +Some changes are so trivial that it is not necessary to create a separate +branch and then merge into each of the test and release branches. For +these changes, just apply directly to the `release` branch, and then +merge that into the `test` branch. + +After pushing your work to `mytree`, you can use +linkgit:git-request-pull[1] to prepare a "please pull" request message +to send to Linus: + +------------------------------------------------- +$ git push mytree +$ git request-pull origin mytree release +------------------------------------------------- + +Here are some of the scripts that simplify all this even further. + +------------------------------------------------- +==== update script ==== +# Update a branch in my Git tree. If the branch to be updated +# is origin, then pull from kernel.org. Otherwise merge +# origin/master branch into test|release branch + +case "$1" in +test|release) + git checkout $1 && git pull . origin + ;; +origin) + before=$(git rev-parse refs/remotes/origin/master) + git fetch origin + after=$(git rev-parse refs/remotes/origin/master) + if [ $before != $after ] + then + git log $before..$after | git shortlog + fi + ;; +*) + echo "usage: $0 origin|test|release" 1>&2 + exit 1 + ;; +esac +------------------------------------------------- + +------------------------------------------------- +==== merge script ==== +# Merge a branch into either the test or release branch + +pname=$0 + +usage() +{ + echo "usage: $pname branch test|release" 1>&2 + exit 1 +} + +git show-ref -q --verify -- refs/heads/"$1" || { + echo "Can't see branch <$1>" 1>&2 + usage +} + +case "$2" in +test|release) + if [ $(git log $2..$1 | wc -c) -eq 0 ] + then + echo $1 already merged into $2 1>&2 + exit 1 + fi + git checkout $2 && git pull . $1 + ;; +*) + usage + ;; +esac +------------------------------------------------- + +------------------------------------------------- +==== status script ==== +# report on status of my ia64 Git tree + +gb=$(tput setab 2) +rb=$(tput setab 1) +restore=$(tput setab 9) + +if [ `git rev-list test..release | wc -c` -gt 0 ] +then + echo $rb Warning: commits in release that are not in test $restore + git log test..release +fi + +for branch in `git show-ref --heads | sed 's|^.*/||'` +do + if [ $branch = test -o $branch = release ] + then + continue + fi + + echo -n $gb ======= $branch ====== $restore " " + status= + for ref in test release origin/master + do + if [ `git rev-list $ref..$branch | wc -c` -gt 0 ] + then + status=$status${ref:0:1} + fi + done + case $status in + trl) + echo $rb Need to pull into test $restore + ;; + rl) + echo "In test" + ;; + l) + echo "Waiting for linus" + ;; + "") + echo $rb All done $restore + ;; + *) + echo $rb "<$status>" $restore + ;; + esac + git log origin/master..$branch | git shortlog +done +------------------------------------------------- + + +[[cleaning-up-history]] +Rewriting history and maintaining patch series +============================================== + +Normally commits are only added to a project, never taken away or +replaced. Git is designed with this assumption, and violating it will +cause Git's merge machinery (for example) to do the wrong thing. + +However, there is a situation in which it can be useful to violate this +assumption. + +[[patch-series]] +Creating the perfect patch series +--------------------------------- + +Suppose you are a contributor to a large project, and you want to add a +complicated feature, and to present it to the other developers in a way +that makes it easy for them to read your changes, verify that they are +correct, and understand why you made each change. + +If you present all of your changes as a single patch (or commit), they +may find that it is too much to digest all at once. + +If you present them with the entire history of your work, complete with +mistakes, corrections, and dead ends, they may be overwhelmed. + +So the ideal is usually to produce a series of patches such that: + + 1. Each patch can be applied in order. + + 2. Each patch includes a single logical change, together with a + message explaining the change. + + 3. No patch introduces a regression: after applying any initial + part of the series, the resulting project still compiles and + works, and has no bugs that it didn't have before. + + 4. The complete series produces the same end result as your own + (probably much messier!) development process did. + +We will introduce some tools that can help you do this, explain how to +use them, and then explain some of the problems that can arise because +you are rewriting history. + +[[using-git-rebase]] +Keeping a patch series up to date using git rebase +-------------------------------------------------- + +Suppose that you create a branch `mywork` on a remote-tracking branch +`origin`, and create some commits on top of it: + +------------------------------------------------- +$ git checkout -b mywork origin +$ vi file.txt +$ git commit +$ vi otherfile.txt +$ git commit +... +------------------------------------------------- + +You have performed no merges into mywork, so it is just a simple linear +sequence of patches on top of `origin`: + +................................................ + o--o--O <-- origin + \ + a--b--c <-- mywork +................................................ + +Some more interesting work has been done in the upstream project, and +`origin` has advanced: + +................................................ + o--o--O--o--o--o <-- origin + \ + a--b--c <-- mywork +................................................ + +At this point, you could use `pull` to merge your changes back in; +the result would create a new merge commit, like this: + +................................................ + o--o--O--o--o--o <-- origin + \ \ + a--b--c--m <-- mywork +................................................ + +However, if you prefer to keep the history in mywork a simple series of +commits without any merges, you may instead choose to use +linkgit:git-rebase[1]: + +------------------------------------------------- +$ git checkout mywork +$ git rebase origin +------------------------------------------------- + +This will remove each of your commits from mywork, temporarily saving +them as patches (in a directory named `.git/rebase-apply`), update mywork to +point at the latest version of origin, then apply each of the saved +patches to the new mywork. The result will look like: + + +................................................ + o--o--O--o--o--o <-- origin + \ + a'--b'--c' <-- mywork +................................................ + +In the process, it may discover conflicts. In that case it will stop +and allow you to fix the conflicts; after fixing conflicts, use `git add` +to update the index with those contents, and then, instead of +running `git commit`, just run + +------------------------------------------------- +$ git rebase --continue +------------------------------------------------- + +and Git will continue applying the rest of the patches. + +At any point you may use the `--abort` option to abort this process and +return mywork to the state it had before you started the rebase: + +------------------------------------------------- +$ git rebase --abort +------------------------------------------------- + +If you need to reorder or edit a number of commits in a branch, it may +be easier to use `git rebase -i`, which allows you to reorder and +squash commits, as well as marking them for individual editing during +the rebase. See <<interactive-rebase>> for details, and +<<reordering-patch-series>> for alternatives. + +[[rewriting-one-commit]] +Rewriting a single commit +------------------------- + +We saw in <<fixing-a-mistake-by-rewriting-history>> that you can replace the +most recent commit using + +------------------------------------------------- +$ git commit --amend +------------------------------------------------- + +which will replace the old commit by a new commit incorporating your +changes, giving you a chance to edit the old commit message first. +This is useful for fixing typos in your last commit, or for adjusting +the patch contents of a poorly staged commit. + +If you need to amend commits from deeper in your history, you can +use <<interactive-rebase,interactive rebase's `edit` instruction>>. + +[[reordering-patch-series]] +Reordering or selecting from a patch series +------------------------------------------- + +Sometimes you want to edit a commit deeper in your history. One +approach is to use `git format-patch` to create a series of patches +and then reset the state to before the patches: + +------------------------------------------------- +$ git format-patch origin +$ git reset --hard origin +------------------------------------------------- + +Then modify, reorder, or eliminate patches as needed before applying +them again with linkgit:git-am[1]: + +------------------------------------------------- +$ git am *.patch +------------------------------------------------- + +[[interactive-rebase]] +Using interactive rebases +------------------------- + +You can also edit a patch series with an interactive rebase. This is +the same as <<reordering-patch-series,reordering a patch series using +`format-patch`>>, so use whichever interface you like best. + +Rebase your current HEAD on the last commit you want to retain as-is. +For example, if you want to reorder the last 5 commits, use: + +------------------------------------------------- +$ git rebase -i HEAD~5 +------------------------------------------------- + +This will open your editor with a list of steps to be taken to perform +your rebase. + +------------------------------------------------- +pick deadbee The oneline of this commit +pick fa1afe1 The oneline of the next commit +... + +# Rebase c0ffeee..deadbee onto c0ffeee +# +# Commands: +# p, pick = use commit +# r, reword = use commit, but edit the commit message +# e, edit = use commit, but stop for amending +# s, squash = use commit, but meld into previous commit +# f, fixup = like "squash", but discard this commit's log message +# x, exec = run command (the rest of the line) using shell +# +# These lines can be re-ordered; they are executed from top to bottom. +# +# If you remove a line here THAT COMMIT WILL BE LOST. +# +# However, if you remove everything, the rebase will be aborted. +# +# Note that empty commits are commented out +------------------------------------------------- + +As explained in the comments, you can reorder commits, squash them +together, edit commit messages, etc. by editing the list. Once you +are satisfied, save the list and close your editor, and the rebase +will begin. + +The rebase will stop where `pick` has been replaced with `edit` or +when a step in the list fails to mechanically resolve conflicts and +needs your help. When you are done editing and/or resolving conflicts +you can continue with `git rebase --continue`. If you decide that +things are getting too hairy, you can always bail out with `git rebase +--abort`. Even after the rebase is complete, you can still recover +the original branch by using the <<reflogs,reflog>>. + +For a more detailed discussion of the procedure and additional tips, +see the "INTERACTIVE MODE" section of linkgit:git-rebase[1]. + +[[patch-series-tools]] +Other tools +----------- + +There are numerous other tools, such as StGit, which exist for the +purpose of maintaining a patch series. These are outside of the scope of +this manual. + +[[problems-With-rewriting-history]] +Problems with rewriting history +------------------------------- + +The primary problem with rewriting the history of a branch has to do +with merging. Suppose somebody fetches your branch and merges it into +their branch, with a result something like this: + +................................................ + o--o--O--o--o--o <-- origin + \ \ + t--t--t--m <-- their branch: +................................................ + +Then suppose you modify the last three commits: + +................................................ + o--o--o <-- new head of origin + / + o--o--O--o--o--o <-- old head of origin +................................................ + +If we examined all this history together in one repository, it will +look like: + +................................................ + o--o--o <-- new head of origin + / + o--o--O--o--o--o <-- old head of origin + \ \ + t--t--t--m <-- their branch: +................................................ + +Git has no way of knowing that the new head is an updated version of +the old head; it treats this situation exactly the same as it would if +two developers had independently done the work on the old and new heads +in parallel. At this point, if someone attempts to merge the new head +in to their branch, Git will attempt to merge together the two (old and +new) lines of development, instead of trying to replace the old by the +new. The results are likely to be unexpected. + +You may still choose to publish branches whose history is rewritten, +and it may be useful for others to be able to fetch those branches in +order to examine or test them, but they should not attempt to pull such +branches into their own work. + +For true distributed development that supports proper merging, +published branches should never be rewritten. + +[[bisect-merges]] +Why bisecting merge commits can be harder than bisecting linear history +----------------------------------------------------------------------- + +The linkgit:git-bisect[1] command correctly handles history that +includes merge commits. However, when the commit that it finds is a +merge commit, the user may need to work harder than usual to figure out +why that commit introduced a problem. + +Imagine this history: + +................................................ + ---Z---o---X---...---o---A---C---D + \ / + o---o---Y---...---o---B +................................................ + +Suppose that on the upper line of development, the meaning of one +of the functions that exists at Z is changed at commit X. The +commits from Z leading to A change both the function's +implementation and all calling sites that exist at Z, as well +as new calling sites they add, to be consistent. There is no +bug at A. + +Suppose that in the meantime on the lower line of development somebody +adds a new calling site for that function at commit Y. The +commits from Z leading to B all assume the old semantics of that +function and the callers and the callee are consistent with each +other. There is no bug at B, either. + +Suppose further that the two development lines merge cleanly at C, +so no conflict resolution is required. + +Nevertheless, the code at C is broken, because the callers added +on the lower line of development have not been converted to the new +semantics introduced on the upper line of development. So if all +you know is that D is bad, that Z is good, and that +linkgit:git-bisect[1] identifies C as the culprit, how will you +figure out that the problem is due to this change in semantics? + +When the result of a `git bisect` is a non-merge commit, you should +normally be able to discover the problem by examining just that commit. +Developers can make this easy by breaking their changes into small +self-contained commits. That won't help in the case above, however, +because the problem isn't obvious from examination of any single +commit; instead, a global view of the development is required. To +make matters worse, the change in semantics in the problematic +function may be just one small part of the changes in the upper +line of development. + +On the other hand, if instead of merging at C you had rebased the +history between Z to B on top of A, you would have gotten this +linear history: + +................................................................ + ---Z---o---X--...---o---A---o---o---Y*--...---o---B*--D* +................................................................ + +Bisecting between Z and D* would hit a single culprit commit Y*, +and understanding why Y* was broken would probably be easier. + +Partly for this reason, many experienced Git users, even when +working on an otherwise merge-heavy project, keep the history +linear by rebasing against the latest upstream version before +publishing. + +[[advanced-branch-management]] +Advanced branch management +========================== + +[[fetching-individual-branches]] +Fetching individual branches +---------------------------- + +Instead of using linkgit:git-remote[1], you can also choose just +to update one branch at a time, and to store it locally under an +arbitrary name: + +------------------------------------------------- +$ git fetch origin todo:my-todo-work +------------------------------------------------- + +The first argument, `origin`, just tells Git to fetch from the +repository you originally cloned from. The second argument tells Git +to fetch the branch named `todo` from the remote repository, and to +store it locally under the name `refs/heads/my-todo-work`. + +You can also fetch branches from other repositories; so + +------------------------------------------------- +$ git fetch git://example.com/proj.git master:example-master +------------------------------------------------- + +will create a new branch named `example-master` and store in it the +branch named `master` from the repository at the given URL. If you +already have a branch named example-master, it will attempt to +<<fast-forwards,fast-forward>> to the commit given by example.com's +master branch. In more detail: + +[[fetch-fast-forwards]] +git fetch and fast-forwards +--------------------------- + +In the previous example, when updating an existing branch, `git fetch` +checks to make sure that the most recent commit on the remote +branch is a descendant of the most recent commit on your copy of the +branch before updating your copy of the branch to point at the new +commit. Git calls this process a <<fast-forwards,fast-forward>>. + +A fast-forward looks something like this: + +................................................ + o--o--o--o <-- old head of the branch + \ + o--o--o <-- new head of the branch +................................................ + + +In some cases it is possible that the new head will *not* actually be +a descendant of the old head. For example, the developer may have +realized she made a serious mistake, and decided to backtrack, +resulting in a situation like: + +................................................ + o--o--o--o--a--b <-- old head of the branch + \ + o--o--o <-- new head of the branch +................................................ + +In this case, `git fetch` will fail, and print out a warning. + +In that case, you can still force Git to update to the new head, as +described in the following section. However, note that in the +situation above this may mean losing the commits labeled `a` and `b`, +unless you've already created a reference of your own pointing to +them. + +[[forcing-fetch]] +Forcing git fetch to do non-fast-forward updates +------------------------------------------------ + +If git fetch fails because the new head of a branch is not a +descendant of the old head, you may force the update with: + +------------------------------------------------- +$ git fetch git://example.com/proj.git +master:refs/remotes/example/master +------------------------------------------------- + +Note the addition of the `+` sign. Alternatively, you can use the `-f` +flag to force updates of all the fetched branches, as in: + +------------------------------------------------- +$ git fetch -f origin +------------------------------------------------- + +Be aware that commits that the old version of example/master pointed at +may be lost, as we saw in the previous section. + +[[remote-branch-configuration]] +Configuring remote-tracking branches +------------------------------------ + +We saw above that `origin` is just a shortcut to refer to the +repository that you originally cloned from. This information is +stored in Git configuration variables, which you can see using +linkgit:git-config[1]: + +------------------------------------------------- +$ git config -l +core.repositoryformatversion=0 +core.filemode=true +core.logallrefupdates=true +remote.origin.url=git://git.kernel.org/pub/scm/git/git.git +remote.origin.fetch=+refs/heads/*:refs/remotes/origin/* +branch.master.remote=origin +branch.master.merge=refs/heads/master +------------------------------------------------- + +If there are other repositories that you also use frequently, you can +create similar configuration options to save typing; for example, + +------------------------------------------------- +$ git remote add example git://example.com/proj.git +------------------------------------------------- + +adds the following to `.git/config`: + +------------------------------------------------- +[remote "example"] + url = git://example.com/proj.git + fetch = +refs/heads/*:refs/remotes/example/* +------------------------------------------------- + +Also note that the above configuration can be performed by directly +editing the file `.git/config` instead of using linkgit:git-remote[1]. + +After configuring the remote, the following three commands will do the +same thing: + +------------------------------------------------- +$ git fetch git://example.com/proj.git +refs/heads/*:refs/remotes/example/* +$ git fetch example +refs/heads/*:refs/remotes/example/* +$ git fetch example +------------------------------------------------- + +See linkgit:git-config[1] for more details on the configuration +options mentioned above and linkgit:git-fetch[1] for more details on +the refspec syntax. + + +[[git-concepts]] +Git concepts +============ + +Git is built on a small number of simple but powerful ideas. While it +is possible to get things done without understanding them, you will find +Git much more intuitive if you do. + +We start with the most important, the <<def_object_database,object +database>> and the <<def_index,index>>. + +[[the-object-database]] +The Object Database +------------------- + + +We already saw in <<understanding-commits>> that all commits are stored +under a 40-digit "object name". In fact, all the information needed to +represent the history of a project is stored in objects with such names. +In each case the name is calculated by taking the SHA-1 hash of the +contents of the object. The SHA-1 hash is a cryptographic hash function. +What that means to us is that it is impossible to find two different +objects with the same name. This has a number of advantages; among +others: + +- Git can quickly determine whether two objects are identical or not, + just by comparing names. +- Since object names are computed the same way in every repository, the + same content stored in two repositories will always be stored under + the same name. +- Git can detect errors when it reads an object, by checking that the + object's name is still the SHA-1 hash of its contents. + +(See <<object-details>> for the details of the object formatting and +SHA-1 calculation.) + +There are four different types of objects: "blob", "tree", "commit", and +"tag". + +- A <<def_blob_object,"blob" object>> is used to store file data. +- A <<def_tree_object,"tree" object>> ties one or more + "blob" objects into a directory structure. In addition, a tree object + can refer to other tree objects, thus creating a directory hierarchy. +- A <<def_commit_object,"commit" object>> ties such directory hierarchies + together into a <<def_DAG,directed acyclic graph>> of revisions--each + commit contains the object name of exactly one tree designating the + directory hierarchy at the time of the commit. In addition, a commit + refers to "parent" commit objects that describe the history of how we + arrived at that directory hierarchy. +- A <<def_tag_object,"tag" object>> symbolically identifies and can be + used to sign other objects. It contains the object name and type of + another object, a symbolic name (of course!) and, optionally, a + signature. + +The object types in some more detail: + +[[commit-object]] +Commit Object +~~~~~~~~~~~~~ + +The "commit" object links a physical state of a tree with a description +of how we got there and why. Use the `--pretty=raw` option to +linkgit:git-show[1] or linkgit:git-log[1] to examine your favorite +commit: + +------------------------------------------------ +$ git show -s --pretty=raw 2be7fcb476 +commit 2be7fcb4764f2dbcee52635b91fedb1b3dcf7ab4 +tree fb3a8bdd0ceddd019615af4d57a53f43d8cee2bf +parent 257a84d9d02e90447b149af58b271c19405edb6a +author Dave Watson <dwatson@mimvista.com> 1187576872 -0400 +committer Junio C Hamano <gitster@pobox.com> 1187591163 -0700 + + Fix misspelling of 'suppress' in docs + + Signed-off-by: Junio C Hamano <gitster@pobox.com> +------------------------------------------------ + +As you can see, a commit is defined by: + +- a tree: The SHA-1 name of a tree object (as defined below), representing + the contents of a directory at a certain point in time. +- parent(s): The SHA-1 name(s) of some number of commits which represent the + immediately previous step(s) in the history of the project. The + example above has one parent; merge commits may have more than + one. A commit with no parents is called a "root" commit, and + represents the initial revision of a project. Each project must have + at least one root. A project can also have multiple roots, though + that isn't common (or necessarily a good idea). +- an author: The name of the person responsible for this change, together + with its date. +- a committer: The name of the person who actually created the commit, + with the date it was done. This may be different from the author, for + example, if the author was someone who wrote a patch and emailed it + to the person who used it to create the commit. +- a comment describing this commit. + +Note that a commit does not itself contain any information about what +actually changed; all changes are calculated by comparing the contents +of the tree referred to by this commit with the trees associated with +its parents. In particular, Git does not attempt to record file renames +explicitly, though it can identify cases where the existence of the same +file data at changing paths suggests a rename. (See, for example, the +`-M` option to linkgit:git-diff[1]). + +A commit is usually created by linkgit:git-commit[1], which creates a +commit whose parent is normally the current HEAD, and whose tree is +taken from the content currently stored in the index. + +[[tree-object]] +Tree Object +~~~~~~~~~~~ + +The ever-versatile linkgit:git-show[1] command can also be used to +examine tree objects, but linkgit:git-ls-tree[1] will give you more +details: + +------------------------------------------------ +$ git ls-tree fb3a8bdd0ce +100644 blob 63c918c667fa005ff12ad89437f2fdc80926e21c .gitignore +100644 blob 5529b198e8d14decbe4ad99db3f7fb632de0439d .mailmap +100644 blob 6ff87c4664981e4397625791c8ea3bbb5f2279a3 COPYING +040000 tree 2fb783e477100ce076f6bf57e4a6f026013dc745 Documentation +100755 blob 3c0032cec592a765692234f1cba47dfdcc3a9200 GIT-VERSION-GEN +100644 blob 289b046a443c0647624607d471289b2c7dcd470b INSTALL +100644 blob 4eb463797adc693dc168b926b6932ff53f17d0b1 Makefile +100644 blob 548142c327a6790ff8821d67c2ee1eff7a656b52 README +... +------------------------------------------------ + +As you can see, a tree object contains a list of entries, each with a +mode, object type, SHA-1 name, and name, sorted by name. It represents +the contents of a single directory tree. + +The object type may be a blob, representing the contents of a file, or +another tree, representing the contents of a subdirectory. Since trees +and blobs, like all other objects, are named by the SHA-1 hash of their +contents, two trees have the same SHA-1 name if and only if their +contents (including, recursively, the contents of all subdirectories) +are identical. This allows Git to quickly determine the differences +between two related tree objects, since it can ignore any entries with +identical object names. + +(Note: in the presence of submodules, trees may also have commits as +entries. See <<submodules>> for documentation.) + +Note that the files all have mode 644 or 755: Git actually only pays +attention to the executable bit. + +[[blob-object]] +Blob Object +~~~~~~~~~~~ + +You can use linkgit:git-show[1] to examine the contents of a blob; take, +for example, the blob in the entry for `COPYING` from the tree above: + +------------------------------------------------ +$ git show 6ff87c4664 + + Note that the only valid version of the GPL as far as this project + is concerned is _this_ particular version of the license (ie v2, not + v2.2 or v3.x or whatever), unless explicitly otherwise stated. +... +------------------------------------------------ + +A "blob" object is nothing but a binary blob of data. It doesn't refer +to anything else or have attributes of any kind. + +Since the blob is entirely defined by its data, if two files in a +directory tree (or in multiple different versions of the repository) +have the same contents, they will share the same blob object. The object +is totally independent of its location in the directory tree, and +renaming a file does not change the object that file is associated with. + +Note that any tree or blob object can be examined using +linkgit:git-show[1] with the <revision>:<path> syntax. This can +sometimes be useful for browsing the contents of a tree that is not +currently checked out. + +[[trust]] +Trust +~~~~~ + +If you receive the SHA-1 name of a blob from one source, and its contents +from another (possibly untrusted) source, you can still trust that those +contents are correct as long as the SHA-1 name agrees. This is because +the SHA-1 is designed so that it is infeasible to find different contents +that produce the same hash. + +Similarly, you need only trust the SHA-1 name of a top-level tree object +to trust the contents of the entire directory that it refers to, and if +you receive the SHA-1 name of a commit from a trusted source, then you +can easily verify the entire history of commits reachable through +parents of that commit, and all of those contents of the trees referred +to by those commits. + +So to introduce some real trust in the system, the only thing you need +to do is to digitally sign just 'one' special note, which includes the +name of a top-level commit. Your digital signature shows others +that you trust that commit, and the immutability of the history of +commits tells others that they can trust the whole history. + +In other words, you can easily validate a whole archive by just +sending out a single email that tells the people the name (SHA-1 hash) +of the top commit, and digitally sign that email using something +like GPG/PGP. + +To assist in this, Git also provides the tag object... + +[[tag-object]] +Tag Object +~~~~~~~~~~ + +A tag object contains an object, object type, tag name, the name of the +person ("tagger") who created the tag, and a message, which may contain +a signature, as can be seen using linkgit:git-cat-file[1]: + +------------------------------------------------ +$ git cat-file tag v1.5.0 +object 437b1b20df4b356c9342dac8d38849f24ef44f27 +type commit +tag v1.5.0 +tagger Junio C Hamano <junkio@cox.net> 1171411200 +0000 + +GIT 1.5.0 +-----BEGIN PGP SIGNATURE----- +Version: GnuPG v1.4.6 (GNU/Linux) + +iD8DBQBF0lGqwMbZpPMRm5oRAuRiAJ9ohBLd7s2kqjkKlq1qqC57SbnmzQCdG4ui +nLE/L9aUXdWeTFPron96DLA= +=2E+0 +-----END PGP SIGNATURE----- +------------------------------------------------ + +See the linkgit:git-tag[1] command to learn how to create and verify tag +objects. (Note that linkgit:git-tag[1] can also be used to create +"lightweight tags", which are not tag objects at all, but just simple +references whose names begin with `refs/tags/`). + +[[pack-files]] +How Git stores objects efficiently: pack files +~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ + +Newly created objects are initially created in a file named after the +object's SHA-1 hash (stored in `.git/objects`). + +Unfortunately this system becomes inefficient once a project has a +lot of objects. Try this on an old project: + +------------------------------------------------ +$ git count-objects +6930 objects, 47620 kilobytes +------------------------------------------------ + +The first number is the number of objects which are kept in +individual files. The second is the amount of space taken up by +those "loose" objects. + +You can save space and make Git faster by moving these loose objects in +to a "pack file", which stores a group of objects in an efficient +compressed format; the details of how pack files are formatted can be +found in link:technical/pack-format.html[pack format]. + +To put the loose objects into a pack, just run git repack: + +------------------------------------------------ +$ git repack +Counting objects: 6020, done. +Delta compression using up to 4 threads. +Compressing objects: 100% (6020/6020), done. +Writing objects: 100% (6020/6020), done. +Total 6020 (delta 4070), reused 0 (delta 0) +------------------------------------------------ + +This creates a single "pack file" in .git/objects/pack/ +containing all currently unpacked objects. You can then run + +------------------------------------------------ +$ git prune +------------------------------------------------ + +to remove any of the "loose" objects that are now contained in the +pack. This will also remove any unreferenced objects (which may be +created when, for example, you use `git reset` to remove a commit). +You can verify that the loose objects are gone by looking at the +`.git/objects` directory or by running + +------------------------------------------------ +$ git count-objects +0 objects, 0 kilobytes +------------------------------------------------ + +Although the object files are gone, any commands that refer to those +objects will work exactly as they did before. + +The linkgit:git-gc[1] command performs packing, pruning, and more for +you, so is normally the only high-level command you need. + +[[dangling-objects]] +Dangling objects +~~~~~~~~~~~~~~~~ + +The linkgit:git-fsck[1] command will sometimes complain about dangling +objects. They are not a problem. + +The most common cause of dangling objects is that you've rebased a +branch, or you have pulled from somebody else who rebased a branch--see +<<cleaning-up-history>>. In that case, the old head of the original +branch still exists, as does everything it pointed to. The branch +pointer itself just doesn't, since you replaced it with another one. + +There are also other situations that cause dangling objects. For +example, a "dangling blob" may arise because you did a `git add` of a +file, but then, before you actually committed it and made it part of the +bigger picture, you changed something else in that file and committed +that *updated* thing--the old state that you added originally ends up +not being pointed to by any commit or tree, so it's now a dangling blob +object. + +Similarly, when the "recursive" merge strategy runs, and finds that +there are criss-cross merges and thus more than one merge base (which is +fairly unusual, but it does happen), it will generate one temporary +midway tree (or possibly even more, if you had lots of criss-crossing +merges and more than two merge bases) as a temporary internal merge +base, and again, those are real objects, but the end result will not end +up pointing to them, so they end up "dangling" in your repository. + +Generally, dangling objects aren't anything to worry about. They can +even be very useful: if you screw something up, the dangling objects can +be how you recover your old tree (say, you did a rebase, and realized +that you really didn't want to--you can look at what dangling objects +you have, and decide to reset your head to some old dangling state). + +For commits, you can just use: + +------------------------------------------------ +$ gitk <dangling-commit-sha-goes-here> --not --all +------------------------------------------------ + +This asks for all the history reachable from the given commit but not +from any branch, tag, or other reference. If you decide it's something +you want, you can always create a new reference to it, e.g., + +------------------------------------------------ +$ git branch recovered-branch <dangling-commit-sha-goes-here> +------------------------------------------------ + +For blobs and trees, you can't do the same, but you can still examine +them. You can just do + +------------------------------------------------ +$ git show <dangling-blob/tree-sha-goes-here> +------------------------------------------------ + +to show what the contents of the blob were (or, for a tree, basically +what the `ls` for that directory was), and that may give you some idea +of what the operation was that left that dangling object. + +Usually, dangling blobs and trees aren't very interesting. They're +almost always the result of either being a half-way mergebase (the blob +will often even have the conflict markers from a merge in it, if you +have had conflicting merges that you fixed up by hand), or simply +because you interrupted a `git fetch` with ^C or something like that, +leaving _some_ of the new objects in the object database, but just +dangling and useless. + +Anyway, once you are sure that you're not interested in any dangling +state, you can just prune all unreachable objects: + +------------------------------------------------ +$ git prune +------------------------------------------------ + +and they'll be gone. (You should only run `git prune` on a quiescent +repository--it's kind of like doing a filesystem fsck recovery: you +don't want to do that while the filesystem is mounted. +`git prune` is designed not to cause any harm in such cases of concurrent +accesses to a repository but you might receive confusing or scary messages.) + +[[recovering-from-repository-corruption]] +Recovering from repository corruption +~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ + +By design, Git treats data trusted to it with caution. However, even in +the absence of bugs in Git itself, it is still possible that hardware or +operating system errors could corrupt data. + +The first defense against such problems is backups. You can back up a +Git directory using clone, or just using cp, tar, or any other backup +mechanism. + +As a last resort, you can search for the corrupted objects and attempt +to replace them by hand. Back up your repository before attempting this +in case you corrupt things even more in the process. + +We'll assume that the problem is a single missing or corrupted blob, +which is sometimes a solvable problem. (Recovering missing trees and +especially commits is *much* harder). + +Before starting, verify that there is corruption, and figure out where +it is with linkgit:git-fsck[1]; this may be time-consuming. + +Assume the output looks like this: + +------------------------------------------------ +$ git fsck --full --no-dangling +broken link from tree 2d9263c6d23595e7cb2a21e5ebbb53655278dff8 + to blob 4b9458b3786228369c63936db65827de3cc06200 +missing blob 4b9458b3786228369c63936db65827de3cc06200 +------------------------------------------------ + +Now you know that blob 4b9458b3 is missing, and that the tree 2d9263c6 +points to it. If you could find just one copy of that missing blob +object, possibly in some other repository, you could move it into +`.git/objects/4b/9458b3...` and be done. Suppose you can't. You can +still examine the tree that pointed to it with linkgit:git-ls-tree[1], +which might output something like: + +------------------------------------------------ +$ git ls-tree 2d9263c6d23595e7cb2a21e5ebbb53655278dff8 +100644 blob 8d14531846b95bfa3564b58ccfb7913a034323b8 .gitignore +100644 blob ebf9bf84da0aab5ed944264a5db2a65fe3a3e883 .mailmap +100644 blob ca442d313d86dc67e0a2e5d584b465bd382cbf5c COPYING +... +100644 blob 4b9458b3786228369c63936db65827de3cc06200 myfile +... +------------------------------------------------ + +So now you know that the missing blob was the data for a file named +`myfile`. And chances are you can also identify the directory--let's +say it's in `somedirectory`. If you're lucky the missing copy might be +the same as the copy you have checked out in your working tree at +`somedirectory/myfile`; you can test whether that's right with +linkgit:git-hash-object[1]: + +------------------------------------------------ +$ git hash-object -w somedirectory/myfile +------------------------------------------------ + +which will create and store a blob object with the contents of +somedirectory/myfile, and output the SHA-1 of that object. if you're +extremely lucky it might be 4b9458b3786228369c63936db65827de3cc06200, in +which case you've guessed right, and the corruption is fixed! + +Otherwise, you need more information. How do you tell which version of +the file has been lost? + +The easiest way to do this is with: + +------------------------------------------------ +$ git log --raw --all --full-history -- somedirectory/myfile +------------------------------------------------ + +Because you're asking for raw output, you'll now get something like + +------------------------------------------------ +commit abc +Author: +Date: +... +:100644 100644 4b9458b... newsha... M somedirectory/myfile + + +commit xyz +Author: +Date: + +... +:100644 100644 oldsha... 4b9458b... M somedirectory/myfile +------------------------------------------------ + +This tells you that the immediately following version of the file was +"newsha", and that the immediately preceding version was "oldsha". +You also know the commit messages that went with the change from oldsha +to 4b9458b and with the change from 4b9458b to newsha. + +If you've been committing small enough changes, you may now have a good +shot at reconstructing the contents of the in-between state 4b9458b. + +If you can do that, you can now recreate the missing object with + +------------------------------------------------ +$ git hash-object -w <recreated-file> +------------------------------------------------ + +and your repository is good again! + +(Btw, you could have ignored the `fsck`, and started with doing a + +------------------------------------------------ +$ git log --raw --all +------------------------------------------------ + +and just looked for the sha of the missing object (4b9458b..) in that +whole thing. It's up to you--Git does *have* a lot of information, it is +just missing one particular blob version. + +[[the-index]] +The index +--------- + +The index is a binary file (generally kept in `.git/index`) containing a +sorted list of path names, each with permissions and the SHA-1 of a blob +object; linkgit:git-ls-files[1] can show you the contents of the index: + +------------------------------------------------- +$ git ls-files --stage +100644 63c918c667fa005ff12ad89437f2fdc80926e21c 0 .gitignore +100644 5529b198e8d14decbe4ad99db3f7fb632de0439d 0 .mailmap +100644 6ff87c4664981e4397625791c8ea3bbb5f2279a3 0 COPYING +100644 a37b2152bd26be2c2289e1f57a292534a51a93c7 0 Documentation/.gitignore +100644 fbefe9a45b00a54b58d94d06eca48b03d40a50e0 0 Documentation/Makefile +... +100644 2511aef8d89ab52be5ec6a5e46236b4b6bcd07ea 0 xdiff/xtypes.h +100644 2ade97b2574a9f77e7ae4002a4e07a6a38e46d07 0 xdiff/xutils.c +100644 d5de8292e05e7c36c4b68857c1cf9855e3d2f70a 0 xdiff/xutils.h +------------------------------------------------- + +Note that in older documentation you may see the index called the +"current directory cache" or just the "cache". It has three important +properties: + +1. The index contains all the information necessary to generate a single +(uniquely determined) tree object. ++ +For example, running linkgit:git-commit[1] generates this tree object +from the index, stores it in the object database, and uses it as the +tree object associated with the new commit. + +2. The index enables fast comparisons between the tree object it defines +and the working tree. ++ +It does this by storing some additional data for each entry (such as +the last modified time). This data is not displayed above, and is not +stored in the created tree object, but it can be used to determine +quickly which files in the working directory differ from what was +stored in the index, and thus save Git from having to read all of the +data from such files to look for changes. + +3. It can efficiently represent information about merge conflicts +between different tree objects, allowing each pathname to be +associated with sufficient information about the trees involved that +you can create a three-way merge between them. ++ +We saw in <<conflict-resolution>> that during a merge the index can +store multiple versions of a single file (called "stages"). The third +column in the linkgit:git-ls-files[1] output above is the stage +number, and will take on values other than 0 for files with merge +conflicts. + +The index is thus a sort of temporary staging area, which is filled with +a tree which you are in the process of working on. + +If you blow the index away entirely, you generally haven't lost any +information as long as you have the name of the tree that it described. + +[[submodules]] +Submodules +========== + +Large projects are often composed of smaller, self-contained modules. For +example, an embedded Linux distribution's source tree would include every +piece of software in the distribution with some local modifications; a movie +player might need to build against a specific, known-working version of a +decompression library; several independent programs might all share the same +build scripts. + +With centralized revision control systems this is often accomplished by +including every module in one single repository. Developers can check out +all modules or only the modules they need to work with. They can even modify +files across several modules in a single commit while moving things around +or updating APIs and translations. + +Git does not allow partial checkouts, so duplicating this approach in Git +would force developers to keep a local copy of modules they are not +interested in touching. Commits in an enormous checkout would be slower +than you'd expect as Git would have to scan every directory for changes. +If modules have a lot of local history, clones would take forever. + +On the plus side, distributed revision control systems can much better +integrate with external sources. In a centralized model, a single arbitrary +snapshot of the external project is exported from its own revision control +and then imported into the local revision control on a vendor branch. All +the history is hidden. With distributed revision control you can clone the +entire external history and much more easily follow development and re-merge +local changes. + +Git's submodule support allows a repository to contain, as a subdirectory, a +checkout of an external project. Submodules maintain their own identity; +the submodule support just stores the submodule repository location and +commit ID, so other developers who clone the containing project +("superproject") can easily clone all the submodules at the same revision. +Partial checkouts of the superproject are possible: you can tell Git to +clone none, some or all of the submodules. + +The linkgit:git-submodule[1] command is available since Git 1.5.3. Users +with Git 1.5.2 can look up the submodule commits in the repository and +manually check them out; earlier versions won't recognize the submodules at +all. + +To see how submodule support works, create four example +repositories that can be used later as a submodule: + +------------------------------------------------- +$ mkdir ~/git +$ cd ~/git +$ for i in a b c d +do + mkdir $i + cd $i + git init + echo "module $i" > $i.txt + git add $i.txt + git commit -m "Initial commit, submodule $i" + cd .. +done +------------------------------------------------- + +Now create the superproject and add all the submodules: + +------------------------------------------------- +$ mkdir super +$ cd super +$ git init +$ for i in a b c d +do + git submodule add ~/git/$i $i +done +------------------------------------------------- + +NOTE: Do not use local URLs here if you plan to publish your superproject! + +See what files `git submodule` created: + +------------------------------------------------- +$ ls -a +. .. .git .gitmodules a b c d +------------------------------------------------- + +The `git submodule add <repo> <path>` command does a couple of things: + +- It clones the submodule from `<repo>` to the given `<path>` under the + current directory and by default checks out the master branch. +- It adds the submodule's clone path to the linkgit:gitmodules[5] file and + adds this file to the index, ready to be committed. +- It adds the submodule's current commit ID to the index, ready to be + committed. + +Commit the superproject: + +------------------------------------------------- +$ git commit -m "Add submodules a, b, c and d." +------------------------------------------------- + +Now clone the superproject: + +------------------------------------------------- +$ cd .. +$ git clone super cloned +$ cd cloned +------------------------------------------------- + +The submodule directories are there, but they're empty: + +------------------------------------------------- +$ ls -a a +. .. +$ git submodule status +-d266b9873ad50488163457f025db7cdd9683d88b a +-e81d457da15309b4fef4249aba9b50187999670d b +-c1536a972b9affea0f16e0680ba87332dc059146 c +-d96249ff5d57de5de093e6baff9e0aafa5276a74 d +------------------------------------------------- + +NOTE: The commit object names shown above would be different for you, but they +should match the HEAD commit object names of your repositories. You can check +it by running `git ls-remote ../a`. + +Pulling down the submodules is a two-step process. First run `git submodule +init` to add the submodule repository URLs to `.git/config`: + +------------------------------------------------- +$ git submodule init +------------------------------------------------- + +Now use `git submodule update` to clone the repositories and check out the +commits specified in the superproject: + +------------------------------------------------- +$ git submodule update +$ cd a +$ ls -a +. .. .git a.txt +------------------------------------------------- + +One major difference between `git submodule update` and `git submodule add` is +that `git submodule update` checks out a specific commit, rather than the tip +of a branch. It's like checking out a tag: the head is detached, so you're not +working on a branch. + +------------------------------------------------- +$ git branch +* (detached from d266b98) + master +------------------------------------------------- + +If you want to make a change within a submodule and you have a detached head, +then you should create or checkout a branch, make your changes, publish the +change within the submodule, and then update the superproject to reference the +new commit: + +------------------------------------------------- +$ git checkout master +------------------------------------------------- + +or + +------------------------------------------------- +$ git checkout -b fix-up +------------------------------------------------- + +then + +------------------------------------------------- +$ echo "adding a line again" >> a.txt +$ git commit -a -m "Updated the submodule from within the superproject." +$ git push +$ cd .. +$ git diff +diff --git a/a b/a +index d266b98..261dfac 160000 +--- a/a ++++ b/a +@@ -1 +1 @@ +-Subproject commit d266b9873ad50488163457f025db7cdd9683d88b ++Subproject commit 261dfac35cb99d380eb966e102c1197139f7fa24 +$ git add a +$ git commit -m "Updated submodule a." +$ git push +------------------------------------------------- + +You have to run `git submodule update` after `git pull` if you want to update +submodules, too. + +Pitfalls with submodules +------------------------ + +Always publish the submodule change before publishing the change to the +superproject that references it. If you forget to publish the submodule change, +others won't be able to clone the repository: + +------------------------------------------------- +$ cd ~/git/super/a +$ echo i added another line to this file >> a.txt +$ git commit -a -m "doing it wrong this time" +$ cd .. +$ git add a +$ git commit -m "Updated submodule a again." +$ git push +$ cd ~/git/cloned +$ git pull +$ git submodule update +error: pathspec '261dfac35cb99d380eb966e102c1197139f7fa24' did not match any file(s) known to git. +Did you forget to 'git add'? +Unable to checkout '261dfac35cb99d380eb966e102c1197139f7fa24' in submodule path 'a' +------------------------------------------------- + +In older Git versions it could be easily forgotten to commit new or modified +files in a submodule, which silently leads to similar problems as not pushing +the submodule changes. Starting with Git 1.7.0 both `git status` and `git diff` +in the superproject show submodules as modified when they contain new or +modified files to protect against accidentally committing such a state. `git +diff` will also add a `-dirty` to the work tree side when generating patch +output or used with the `--submodule` option: + +------------------------------------------------- +$ git diff +diff --git a/sub b/sub +--- a/sub ++++ b/sub +@@ -1 +1 @@ +-Subproject commit 3f356705649b5d566d97ff843cf193359229a453 ++Subproject commit 3f356705649b5d566d97ff843cf193359229a453-dirty +$ git diff --submodule +Submodule sub 3f35670..3f35670-dirty: +------------------------------------------------- + +You also should not rewind branches in a submodule beyond commits that were +ever recorded in any superproject. + +It's not safe to run `git submodule update` if you've made and committed +changes within a submodule without checking out a branch first. They will be +silently overwritten: + +------------------------------------------------- +$ cat a.txt +module a +$ echo line added from private2 >> a.txt +$ git commit -a -m "line added inside private2" +$ cd .. +$ git submodule update +Submodule path 'a': checked out 'd266b9873ad50488163457f025db7cdd9683d88b' +$ cd a +$ cat a.txt +module a +------------------------------------------------- + +NOTE: The changes are still visible in the submodule's reflog. + +If you have uncommitted changes in your submodule working tree, `git +submodule update` will not overwrite them. Instead, you get the usual +warning about not being able switch from a dirty branch. + +[[low-level-operations]] +Low-level Git operations +======================== + +Many of the higher-level commands were originally implemented as shell +scripts using a smaller core of low-level Git commands. These can still +be useful when doing unusual things with Git, or just as a way to +understand its inner workings. + +[[object-manipulation]] +Object access and manipulation +------------------------------ + +The linkgit:git-cat-file[1] command can show the contents of any object, +though the higher-level linkgit:git-show[1] is usually more useful. + +The linkgit:git-commit-tree[1] command allows constructing commits with +arbitrary parents and trees. + +A tree can be created with linkgit:git-write-tree[1] and its data can be +accessed by linkgit:git-ls-tree[1]. Two trees can be compared with +linkgit:git-diff-tree[1]. + +A tag is created with linkgit:git-mktag[1], and the signature can be +verified by linkgit:git-verify-tag[1], though it is normally simpler to +use linkgit:git-tag[1] for both. + +[[the-workflow]] +The Workflow +------------ + +High-level operations such as linkgit:git-commit[1], +linkgit:git-checkout[1] and linkgit:git-reset[1] work by moving data +between the working tree, the index, and the object database. Git +provides low-level operations which perform each of these steps +individually. + +Generally, all Git operations work on the index file. Some operations +work *purely* on the index file (showing the current state of the +index), but most operations move data between the index file and either +the database or the working directory. Thus there are four main +combinations: + +[[working-directory-to-index]] +working directory -> index +~~~~~~~~~~~~~~~~~~~~~~~~~~ + +The linkgit:git-update-index[1] command updates the index with +information from the working directory. You generally update the +index information by just specifying the filename you want to update, +like so: + +------------------------------------------------- +$ git update-index filename +------------------------------------------------- + +but to avoid common mistakes with filename globbing etc., the command +will not normally add totally new entries or remove old entries, +i.e. it will normally just update existing cache entries. + +To tell Git that yes, you really do realize that certain files no +longer exist, or that new files should be added, you +should use the `--remove` and `--add` flags respectively. + +NOTE! A `--remove` flag does 'not' mean that subsequent filenames will +necessarily be removed: if the files still exist in your directory +structure, the index will be updated with their new status, not +removed. The only thing `--remove` means is that update-index will be +considering a removed file to be a valid thing, and if the file really +does not exist any more, it will update the index accordingly. + +As a special case, you can also do `git update-index --refresh`, which +will refresh the "stat" information of each index to match the current +stat information. It will 'not' update the object status itself, and +it will only update the fields that are used to quickly test whether +an object still matches its old backing store object. + +The previously introduced linkgit:git-add[1] is just a wrapper for +linkgit:git-update-index[1]. + +[[index-to-object-database]] +index -> object database +~~~~~~~~~~~~~~~~~~~~~~~~ + +You write your current index file to a "tree" object with the program + +------------------------------------------------- +$ git write-tree +------------------------------------------------- + +that doesn't come with any options--it will just write out the +current index into the set of tree objects that describe that state, +and it will return the name of the resulting top-level tree. You can +use that tree to re-generate the index at any time by going in the +other direction: + +[[object-database-to-index]] +object database -> index +~~~~~~~~~~~~~~~~~~~~~~~~ + +You read a "tree" file from the object database, and use that to +populate (and overwrite--don't do this if your index contains any +unsaved state that you might want to restore later!) your current +index. Normal operation is just + +------------------------------------------------- +$ git read-tree <SHA-1 of tree> +------------------------------------------------- + +and your index file will now be equivalent to the tree that you saved +earlier. However, that is only your 'index' file: your working +directory contents have not been modified. + +[[index-to-working-directory]] +index -> working directory +~~~~~~~~~~~~~~~~~~~~~~~~~~ + +You update your working directory from the index by "checking out" +files. This is not a very common operation, since normally you'd just +keep your files updated, and rather than write to your working +directory, you'd tell the index files about the changes in your +working directory (i.e. `git update-index`). + +However, if you decide to jump to a new version, or check out somebody +else's version, or just restore a previous tree, you'd populate your +index file with read-tree, and then you need to check out the result +with + +------------------------------------------------- +$ git checkout-index filename +------------------------------------------------- + +or, if you want to check out all of the index, use `-a`. + +NOTE! `git checkout-index` normally refuses to overwrite old files, so +if you have an old version of the tree already checked out, you will +need to use the `-f` flag ('before' the `-a` flag or the filename) to +'force' the checkout. + + +Finally, there are a few odds and ends which are not purely moving +from one representation to the other: + +[[tying-it-all-together]] +Tying it all together +~~~~~~~~~~~~~~~~~~~~~ + +To commit a tree you have instantiated with `git write-tree`, you'd +create a "commit" object that refers to that tree and the history +behind it--most notably the "parent" commits that preceded it in +history. + +Normally a "commit" has one parent: the previous state of the tree +before a certain change was made. However, sometimes it can have two +or more parent commits, in which case we call it a "merge", due to the +fact that such a commit brings together ("merges") two or more +previous states represented by other commits. + +In other words, while a "tree" represents a particular directory state +of a working directory, a "commit" represents that state in time, +and explains how we got there. + +You create a commit object by giving it the tree that describes the +state at the time of the commit, and a list of parents: + +------------------------------------------------- +$ git commit-tree <tree> -p <parent> [(-p <parent2>)...] +------------------------------------------------- + +and then giving the reason for the commit on stdin (either through +redirection from a pipe or file, or by just typing it at the tty). + +`git commit-tree` will return the name of the object that represents +that commit, and you should save it away for later use. Normally, +you'd commit a new `HEAD` state, and while Git doesn't care where you +save the note about that state, in practice we tend to just write the +result to the file pointed at by `.git/HEAD`, so that we can always see +what the last committed state was. + +Here is a picture that illustrates how various pieces fit together: + +------------ + + commit-tree + commit obj + +----+ + | | + | | + V V + +-----------+ + | Object DB | + | Backing | + | Store | + +-----------+ + ^ + write-tree | | + tree obj | | + | | read-tree + | | tree obj + V + +-----------+ + | Index | + | "cache" | + +-----------+ + update-index ^ + blob obj | | + | | + checkout-index -u | | checkout-index + stat | | blob obj + V + +-----------+ + | Working | + | Directory | + +-----------+ + +------------ + + +[[examining-the-data]] +Examining the data +------------------ + +You can examine the data represented in the object database and the +index with various helper tools. For every object, you can use +linkgit:git-cat-file[1] to examine details about the +object: + +------------------------------------------------- +$ git cat-file -t <objectname> +------------------------------------------------- + +shows the type of the object, and once you have the type (which is +usually implicit in where you find the object), you can use + +------------------------------------------------- +$ git cat-file blob|tree|commit|tag <objectname> +------------------------------------------------- + +to show its contents. NOTE! Trees have binary content, and as a result +there is a special helper for showing that content, called +`git ls-tree`, which turns the binary content into a more easily +readable form. + +It's especially instructive to look at "commit" objects, since those +tend to be small and fairly self-explanatory. In particular, if you +follow the convention of having the top commit name in `.git/HEAD`, +you can do + +------------------------------------------------- +$ git cat-file commit HEAD +------------------------------------------------- + +to see what the top commit was. + +[[merging-multiple-trees]] +Merging multiple trees +---------------------- + +Git can help you perform a three-way merge, which can in turn be +used for a many-way merge by repeating the merge procedure several +times. The usual situation is that you only do one three-way merge +(reconciling two lines of history) and commit the result, but if +you like to, you can merge several branches in one go. + +To perform a three-way merge, you start with the two commits you +want to merge, find their closest common parent (a third commit), +and compare the trees corresponding to these three commits. + +To get the "base" for the merge, look up the common parent of two +commits: + +------------------------------------------------- +$ git merge-base <commit1> <commit2> +------------------------------------------------- + +This prints the name of a commit they are both based on. You should +now look up the tree objects of those commits, which you can easily +do with + +------------------------------------------------- +$ git cat-file commit <commitname> | head -1 +------------------------------------------------- + +since the tree object information is always the first line in a commit +object. + +Once you know the three trees you are going to merge (the one "original" +tree, aka the common tree, and the two "result" trees, aka the branches +you want to merge), you do a "merge" read into the index. This will +complain if it has to throw away your old index contents, so you should +make sure that you've committed those--in fact you would normally +always do a merge against your last commit (which should thus match what +you have in your current index anyway). + +To do the merge, do + +------------------------------------------------- +$ git read-tree -m -u <origtree> <yourtree> <targettree> +------------------------------------------------- + +which will do all trivial merge operations for you directly in the +index file, and you can just write the result out with +`git write-tree`. + + +[[merging-multiple-trees-2]] +Merging multiple trees, continued +--------------------------------- + +Sadly, many merges aren't trivial. If there are files that have +been added, moved or removed, or if both branches have modified the +same file, you will be left with an index tree that contains "merge +entries" in it. Such an index tree can 'NOT' be written out to a tree +object, and you will have to resolve any such merge clashes using +other tools before you can write out the result. + +You can examine such index state with `git ls-files --unmerged` +command. An example: + +------------------------------------------------ +$ git read-tree -m $orig HEAD $target +$ git ls-files --unmerged +100644 263414f423d0e4d70dae8fe53fa34614ff3e2860 1 hello.c +100644 06fa6a24256dc7e560efa5687fa84b51f0263c3a 2 hello.c +100644 cc44c73eb783565da5831b4d820c962954019b69 3 hello.c +------------------------------------------------ + +Each line of the `git ls-files --unmerged` output begins with +the blob mode bits, blob SHA-1, 'stage number', and the +filename. The 'stage number' is Git's way to say which tree it +came from: stage 1 corresponds to the `$orig` tree, stage 2 to +the `HEAD` tree, and stage 3 to the `$target` tree. + +Earlier we said that trivial merges are done inside +`git read-tree -m`. For example, if the file did not change +from `$orig` to `HEAD` or `$target`, or if the file changed +from `$orig` to `HEAD` and `$orig` to `$target` the same way, +obviously the final outcome is what is in `HEAD`. What the +above example shows is that file `hello.c` was changed from +`$orig` to `HEAD` and `$orig` to `$target` in a different way. +You could resolve this by running your favorite 3-way merge +program, e.g. `diff3`, `merge`, or Git's own merge-file, on +the blob objects from these three stages yourself, like this: + +------------------------------------------------ +$ git cat-file blob 263414f... >hello.c~1 +$ git cat-file blob 06fa6a2... >hello.c~2 +$ git cat-file blob cc44c73... >hello.c~3 +$ git merge-file hello.c~2 hello.c~1 hello.c~3 +------------------------------------------------ + +This would leave the merge result in `hello.c~2` file, along +with conflict markers if there are conflicts. After verifying +the merge result makes sense, you can tell Git what the final +merge result for this file is by: + +------------------------------------------------- +$ mv -f hello.c~2 hello.c +$ git update-index hello.c +------------------------------------------------- + +When a path is in the "unmerged" state, running `git update-index` for +that path tells Git to mark the path resolved. + +The above is the description of a Git merge at the lowest level, +to help you understand what conceptually happens under the hood. +In practice, nobody, not even Git itself, runs `git cat-file` three times +for this. There is a `git merge-index` program that extracts the +stages to temporary files and calls a "merge" script on it: + +------------------------------------------------- +$ git merge-index git-merge-one-file hello.c +------------------------------------------------- + +and that is what higher level `git merge -s resolve` is implemented with. + +[[hacking-git]] +Hacking Git +=========== + +This chapter covers internal details of the Git implementation which +probably only Git developers need to understand. + +[[object-details]] +Object storage format +--------------------- + +All objects have a statically determined "type" which identifies the +format of the object (i.e. how it is used, and how it can refer to other +objects). There are currently four different object types: "blob", +"tree", "commit", and "tag". + +Regardless of object type, all objects share the following +characteristics: they are all deflated with zlib, and have a header +that not only specifies their type, but also provides size information +about the data in the object. It's worth noting that the SHA-1 hash +that is used to name the object is the hash of the original data +plus this header, so `sha1sum` 'file' does not match the object name +for 'file'. + +As a result, the general consistency of an object can always be tested +independently of the contents or the type of the object: all objects can +be validated by verifying that (a) their hashes match the content of the +file and (b) the object successfully inflates to a stream of bytes that +forms a sequence of +`<ascii type without space> + <space> + <ascii decimal size> + +<byte\0> + <binary object data>`. + +The structured objects can further have their structure and +connectivity to other objects verified. This is generally done with +the `git fsck` program, which generates a full dependency graph +of all objects, and verifies their internal consistency (in addition +to just verifying their superficial consistency through the hash). + +[[birdview-on-the-source-code]] +A birds-eye view of Git's source code +------------------------------------- + +It is not always easy for new developers to find their way through Git's +source code. This section gives you a little guidance to show where to +start. + +A good place to start is with the contents of the initial commit, with: + +---------------------------------------------------- +$ git checkout e83c5163 +---------------------------------------------------- + +The initial revision lays the foundation for almost everything Git has +today, but is small enough to read in one sitting. + +Note that terminology has changed since that revision. For example, the +README in that revision uses the word "changeset" to describe what we +now call a <<def_commit_object,commit>>. + +Also, we do not call it "cache" any more, but rather "index"; however, the +file is still called `cache.h`. Remark: Not much reason to change it now, +especially since there is no good single name for it anyway, because it is +basically _the_ header file which is included by _all_ of Git's C sources. + +If you grasp the ideas in that initial commit, you should check out a +more recent version and skim `cache.h`, `object.h` and `commit.h`. + +In the early days, Git (in the tradition of UNIX) was a bunch of programs +which were extremely simple, and which you used in scripts, piping the +output of one into another. This turned out to be good for initial +development, since it was easier to test new things. However, recently +many of these parts have become builtins, and some of the core has been +"libified", i.e. put into libgit.a for performance, portability reasons, +and to avoid code duplication. + +By now, you know what the index is (and find the corresponding data +structures in `cache.h`), and that there are just a couple of object types +(blobs, trees, commits and tags) which inherit their common structure from +`struct object`, which is their first member (and thus, you can cast e.g. +`(struct object *)commit` to achieve the _same_ as `&commit->object`, i.e. +get at the object name and flags). + +Now is a good point to take a break to let this information sink in. + +Next step: get familiar with the object naming. Read <<naming-commits>>. +There are quite a few ways to name an object (and not only revisions!). +All of these are handled in `sha1_name.c`. Just have a quick look at +the function `get_sha1()`. A lot of the special handling is done by +functions like `get_sha1_basic()` or the likes. + +This is just to get you into the groove for the most libified part of Git: +the revision walker. + +Basically, the initial version of `git log` was a shell script: + +---------------------------------------------------------------- +$ git-rev-list --pretty $(git-rev-parse --default HEAD "$@") | \ + LESS=-S ${PAGER:-less} +---------------------------------------------------------------- + +What does this mean? + +`git rev-list` is the original version of the revision walker, which +_always_ printed a list of revisions to stdout. It is still functional, +and needs to, since most new Git commands start out as scripts using +`git rev-list`. + +`git rev-parse` is not as important any more; it was only used to filter out +options that were relevant for the different plumbing commands that were +called by the script. + +Most of what `git rev-list` did is contained in `revision.c` and +`revision.h`. It wraps the options in a struct named `rev_info`, which +controls how and what revisions are walked, and more. + +The original job of `git rev-parse` is now taken by the function +`setup_revisions()`, which parses the revisions and the common command-line +options for the revision walker. This information is stored in the struct +`rev_info` for later consumption. You can do your own command-line option +parsing after calling `setup_revisions()`. After that, you have to call +`prepare_revision_walk()` for initialization, and then you can get the +commits one by one with the function `get_revision()`. + +If you are interested in more details of the revision walking process, +just have a look at the first implementation of `cmd_log()`; call +`git show v1.3.0~155^2~4` and scroll down to that function (note that you +no longer need to call `setup_pager()` directly). + +Nowadays, `git log` is a builtin, which means that it is _contained_ in the +command `git`. The source side of a builtin is + +- a function called `cmd_<bla>`, typically defined in `builtin/<bla.c>` + (note that older versions of Git used to have it in `builtin-<bla>.c` + instead), and declared in `builtin.h`. + +- an entry in the `commands[]` array in `git.c`, and + +- an entry in `BUILTIN_OBJECTS` in the `Makefile`. + +Sometimes, more than one builtin is contained in one source file. For +example, `cmd_whatchanged()` and `cmd_log()` both reside in `builtin/log.c`, +since they share quite a bit of code. In that case, the commands which are +_not_ named like the `.c` file in which they live have to be listed in +`BUILT_INS` in the `Makefile`. + +`git log` looks more complicated in C than it does in the original script, +but that allows for a much greater flexibility and performance. + +Here again it is a good point to take a pause. + +Lesson three is: study the code. Really, it is the best way to learn about +the organization of Git (after you know the basic concepts). + +So, think about something which you are interested in, say, "how can I +access a blob just knowing the object name of it?". The first step is to +find a Git command with which you can do it. In this example, it is either +`git show` or `git cat-file`. + +For the sake of clarity, let's stay with `git cat-file`, because it + +- is plumbing, and + +- was around even in the initial commit (it literally went only through + some 20 revisions as `cat-file.c`, was renamed to `builtin/cat-file.c` + when made a builtin, and then saw less than 10 versions). + +So, look into `builtin/cat-file.c`, search for `cmd_cat_file()` and look what +it does. + +------------------------------------------------------------------ + git_config(git_default_config); + if (argc != 3) + usage("git cat-file [-t|-s|-e|-p|<type>] <sha1>"); + if (get_sha1(argv[2], sha1)) + die("Not a valid object name %s", argv[2]); +------------------------------------------------------------------ + +Let's skip over the obvious details; the only really interesting part +here is the call to `get_sha1()`. It tries to interpret `argv[2]` as an +object name, and if it refers to an object which is present in the current +repository, it writes the resulting SHA-1 into the variable `sha1`. + +Two things are interesting here: + +- `get_sha1()` returns 0 on _success_. This might surprise some new + Git hackers, but there is a long tradition in UNIX to return different + negative numbers in case of different errors--and 0 on success. + +- the variable `sha1` in the function signature of `get_sha1()` is `unsigned + char *`, but is actually expected to be a pointer to `unsigned + char[20]`. This variable will contain the 160-bit SHA-1 of the given + commit. Note that whenever a SHA-1 is passed as `unsigned char *`, it + is the binary representation, as opposed to the ASCII representation in + hex characters, which is passed as `char *`. + +You will see both of these things throughout the code. + +Now, for the meat: + +----------------------------------------------------------------------------- + case 0: + buf = read_object_with_reference(sha1, argv[1], &size, NULL); +----------------------------------------------------------------------------- + +This is how you read a blob (actually, not only a blob, but any type of +object). To know how the function `read_object_with_reference()` actually +works, find the source code for it (something like `git grep +read_object_with | grep ":[a-z]"` in the Git repository), and read +the source. + +To find out how the result can be used, just read on in `cmd_cat_file()`: + +----------------------------------- + write_or_die(1, buf, size); +----------------------------------- + +Sometimes, you do not know where to look for a feature. In many such cases, +it helps to search through the output of `git log`, and then `git show` the +corresponding commit. + +Example: If you know that there was some test case for `git bundle`, but +do not remember where it was (yes, you _could_ `git grep bundle t/`, but that +does not illustrate the point!): + +------------------------ +$ git log --no-merges t/ +------------------------ + +In the pager (`less`), just search for "bundle", go a few lines back, +and see that it is in commit 18449ab0... Now just copy this object name, +and paste it into the command line + +------------------- +$ git show 18449ab0 +------------------- + +Voila. + +Another example: Find out what to do in order to make some script a +builtin: + +------------------------------------------------- +$ git log --no-merges --diff-filter=A builtin/*.c +------------------------------------------------- + +You see, Git is actually the best tool to find out about the source of Git +itself! + +[[glossary]] +Git Glossary +============ + +include::glossary-content.txt[] + +[[git-quick-start]] +Appendix A: Git Quick Reference +=============================== + +This is a quick summary of the major commands; the previous chapters +explain how these work in more detail. + +[[quick-creating-a-new-repository]] +Creating a new repository +------------------------- + +From a tarball: + +----------------------------------------------- +$ tar xzf project.tar.gz +$ cd project +$ git init +Initialized empty Git repository in .git/ +$ git add . +$ git commit +----------------------------------------------- + +From a remote repository: + +----------------------------------------------- +$ git clone git://example.com/pub/project.git +$ cd project +----------------------------------------------- + +[[managing-branches]] +Managing branches +----------------- + +----------------------------------------------- +$ git branch # list all local branches in this repo +$ git checkout test # switch working directory to branch "test" +$ git branch new # create branch "new" starting at current HEAD +$ git branch -d new # delete branch "new" +----------------------------------------------- + +Instead of basing a new branch on current HEAD (the default), use: + +----------------------------------------------- +$ git branch new test # branch named "test" +$ git branch new v2.6.15 # tag named v2.6.15 +$ git branch new HEAD^ # commit before the most recent +$ git branch new HEAD^^ # commit before that +$ git branch new test~10 # ten commits before tip of branch "test" +----------------------------------------------- + +Create and switch to a new branch at the same time: + +----------------------------------------------- +$ git checkout -b new v2.6.15 +----------------------------------------------- + +Update and examine branches from the repository you cloned from: + +----------------------------------------------- +$ git fetch # update +$ git branch -r # list + origin/master + origin/next + ... +$ git checkout -b masterwork origin/master +----------------------------------------------- + +Fetch a branch from a different repository, and give it a new +name in your repository: + +----------------------------------------------- +$ git fetch git://example.com/project.git theirbranch:mybranch +$ git fetch git://example.com/project.git v2.6.15:mybranch +----------------------------------------------- + +Keep a list of repositories you work with regularly: + +----------------------------------------------- +$ git remote add example git://example.com/project.git +$ git remote # list remote repositories +example +origin +$ git remote show example # get details +* remote example + URL: git://example.com/project.git + Tracked remote branches + master + next + ... +$ git fetch example # update branches from example +$ git branch -r # list all remote branches +----------------------------------------------- + + +[[exploring-history]] +Exploring history +----------------- + +----------------------------------------------- +$ gitk # visualize and browse history +$ git log # list all commits +$ git log src/ # ...modifying src/ +$ git log v2.6.15..v2.6.16 # ...in v2.6.16, not in v2.6.15 +$ git log master..test # ...in branch test, not in branch master +$ git log test..master # ...in branch master, but not in test +$ git log test...master # ...in one branch, not in both +$ git log -S'foo()' # ...where difference contain "foo()" +$ git log --since="2 weeks ago" +$ git log -p # show patches as well +$ git show # most recent commit +$ git diff v2.6.15..v2.6.16 # diff between two tagged versions +$ git diff v2.6.15..HEAD # diff with current head +$ git grep "foo()" # search working directory for "foo()" +$ git grep v2.6.15 "foo()" # search old tree for "foo()" +$ git show v2.6.15:a.txt # look at old version of a.txt +----------------------------------------------- + +Search for regressions: + +----------------------------------------------- +$ git bisect start +$ git bisect bad # current version is bad +$ git bisect good v2.6.13-rc2 # last known good revision +Bisecting: 675 revisions left to test after this + # test here, then: +$ git bisect good # if this revision is good, or +$ git bisect bad # if this revision is bad. + # repeat until done. +----------------------------------------------- + +[[making-changes]] +Making changes +-------------- + +Make sure Git knows who to blame: + +------------------------------------------------ +$ cat >>~/.gitconfig <<\EOF +[user] + name = Your Name Comes Here + email = you@yourdomain.example.com +EOF +------------------------------------------------ + +Select file contents to include in the next commit, then make the +commit: + +----------------------------------------------- +$ git add a.txt # updated file +$ git add b.txt # new file +$ git rm c.txt # old file +$ git commit +----------------------------------------------- + +Or, prepare and create the commit in one step: + +----------------------------------------------- +$ git commit d.txt # use latest content only of d.txt +$ git commit -a # use latest content of all tracked files +----------------------------------------------- + +[[merging]] +Merging +------- + +----------------------------------------------- +$ git merge test # merge branch "test" into the current branch +$ git pull git://example.com/project.git master + # fetch and merge in remote branch +$ git pull . test # equivalent to git merge test +----------------------------------------------- + +[[sharing-your-changes]] +Sharing your changes +-------------------- + +Importing or exporting patches: + +----------------------------------------------- +$ git format-patch origin..HEAD # format a patch for each commit + # in HEAD but not in origin +$ git am mbox # import patches from the mailbox "mbox" +----------------------------------------------- + +Fetch a branch in a different Git repository, then merge into the +current branch: + +----------------------------------------------- +$ git pull git://example.com/project.git theirbranch +----------------------------------------------- + +Store the fetched branch into a local branch before merging into the +current branch: + +----------------------------------------------- +$ git pull git://example.com/project.git theirbranch:mybranch +----------------------------------------------- + +After creating commits on a local branch, update the remote +branch with your commits: + +----------------------------------------------- +$ git push ssh://example.com/project.git mybranch:theirbranch +----------------------------------------------- + +When remote and local branch are both named "test": + +----------------------------------------------- +$ git push ssh://example.com/project.git test +----------------------------------------------- + +Shortcut version for a frequently used remote repository: + +----------------------------------------------- +$ git remote add example ssh://example.com/project.git +$ git push example test +----------------------------------------------- + +[[repository-maintenance]] +Repository maintenance +---------------------- + +Check for corruption: + +----------------------------------------------- +$ git fsck +----------------------------------------------- + +Recompress, remove unused cruft: + +----------------------------------------------- +$ git gc +----------------------------------------------- + + +[[todo]] +Appendix B: Notes and todo list for this manual +=============================================== + +This is a work in progress. + +The basic requirements: + +- It must be readable in order, from beginning to end, by someone + intelligent with a basic grasp of the UNIX command line, but without + any special knowledge of Git. If necessary, any other prerequisites + should be specifically mentioned as they arise. +- Whenever possible, section headings should clearly describe the task + they explain how to do, in language that requires no more knowledge + than necessary: for example, "importing patches into a project" rather + than "the `git am` command" + +Think about how to create a clear chapter dependency graph that will +allow people to get to important topics without necessarily reading +everything in between. + +Scan `Documentation/` for other stuff left out; in particular: + +- howto's +- some of `technical/`? +- hooks +- list of commands in linkgit:git[1] + +Scan email archives for other stuff left out + +Scan man pages to see if any assume more background than this manual +provides. + +Add more good examples. Entire sections of just cookbook examples +might be a good idea; maybe make an "advanced examples" section a +standard end-of-chapter section? + +Include cross-references to the glossary, where appropriate. + +Add a section on working with other version control systems, including +CVS, Subversion, and just imports of series of release tarballs. + +Write a chapter on using plumbing and writing scripts. + +Alternates, clone -reference, etc. + +More on recovery from repository corruption. See: + http://marc.info/?l=git&m=117263864820799&w=2 + http://marc.info/?l=git&m=117147855503798&w=2 |