path: root/Documentation/gitattributes.txt
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2008-02-06safecrlf: Add mechanism to warn about irreversible crlf conversionsSteffen Prohaska
CRLF conversion bears a slight chance of corrupting data. autocrlf=true 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. This patch adds a mechanism that can either warn the user about an irreversible conversion or can even refuse to convert. The mechanism is controlled by the variable core.safecrlf, with the following values: - false: disable safecrlf mechanism - warn: warn about irreversible conversions - true: refuse irreversible conversions The default is to warn. Users are only affected by this default if core.autocrlf is set. But the current default of git is to leave core.autocrlf unset, so users will not see warnings unless they deliberately chose to activate the autocrlf mechanism. The safecrlf mechanism's details depend on the git command. The general principles when safecrlf is active (not false) are: - we warn/error out if files in the work tree can modified in an irreversible way without giving the user a chance to backup the original file. - for read-only operations that do not modify files in the work tree we do not not print annoying warnings. There are 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. The concept of a safety check was originally proposed in a similar way by Linus Torvalds. Thanks to Dimitry Potapov for insisting on getting the naked LF/autocrlf=true case right. Signed-off-by: Steffen Prohaska <>
2008-01-07Documentation: rename gitlink macro to linkgitDan McGee
Between AsciiDoc 8.2.2 and 8.2.3, the following change was made to the stock Asciidoc configuration: @@ -149,7 +153,10 @@ # Inline macros. # Backslash prefix required for escape processing. # (?s) re flag for line spanning. -(?su)[\\]?(?P<name>\w(\w|-)*?):(?P<target>\S*?)(\[(?P<attrlist>.*?)\])= + +# Explicit so they can be nested. +(?su)[\\]?(?P<name>(http|https|ftp|file|mailto|callto|image|link)):(?P<target>\S*?)(\[(?P<attrlist>.*?)\])= + # Anchor: [[[id]]]. Bibliographic anchor. (?su)[\\]?\[\[\[(?P<attrlist>[\w][\w-]*?)\]\]\]=anchor3 # Anchor: [[id,xreflabel]] This default regex now matches explicit values, and unfortunately in this case gitlink was being matched by just 'link', causing the wrong inline macro template to be applied. By renaming the macro, we can avoid being matched by the wrong regex. Signed-off-by: Dan McGee <> Signed-off-by: Junio C Hamano <>
2007-12-23Documentation: describe 'union' low-level merge driverJunio C Hamano
Signed-off-by: Junio C Hamano <>
2007-12-09Merge branch 'jc/spht'Junio C Hamano
* jc/spht: Use gitattributes to define per-path whitespace rule core.whitespace: documentation updates. builtin-apply: teach whitespace_rules builtin-apply: rename "whitespace" variables and fix styles core.whitespace: add test for diff whitespace error highlighting git-diff: complain about >=8 consecutive spaces in initial indent War on whitespace: first, a bit of retreat. Conflicts: cache.h config.c diff.c
2007-12-06Use gitattributes to define per-path whitespace ruleJunio C Hamano
The `core.whitespace` configuration variable allows you to define what `diff` and `apply` should consider whitespace errors for all paths in the project (See gitlink:git-config[1]). This attribute gives you finer control per path. For example, if you have these in the .gitattributes: frotz whitespace nitfol -whitespace xyzzy whitespace=-trailing all types of whitespace problems known to git are noticed in path 'frotz' (i.e. diff shows them in diff.whitespace color, and apply warns about them), no whitespace problem is noticed in path 'nitfol', and the default types of whitespace problems except "trailing whitespace" are noticed for path 'xyzzy'. A project with mixed Python and C might want to have: *.c whitespace *.py whitespace=-indent-with-non-tab in its toplevel .gitattributes file. Signed-off-by: Junio C Hamano <>
2007-11-14Merge branch 'maint'Junio C Hamano
* maint: git-clean: honor core.excludesfile Documentation: Fix man page breakage with DocBook XSL v1.72 git-remote.txt: fix typo core-tutorial.txt: Fix argument mistake in an example. replace reference to git-rm with git-reset in git-commit doc Grammar fixes for gitattributes documentation Don't allow fast-import tree delta chains to exceed maximum depth revert/cherry-pick: allow starting from dirty work tree. t/t3404: fix test for a bogus todo file. Conflicts: fast-import.c
2007-11-14Grammar fixes for gitattributes documentationWincent Colaiuta
Tweak the "filter" section of the gitattributes documentation to add some missing articles and improve some word choices without changing the semantics of the section. Signed-off-by: Wincent Colaiuta <> Signed-off-by: Junio C Hamano <>
2007-09-29Sync with GIT C Hamano
Signed-off-by: Junio C Hamano <>
2007-09-26gitattributes.txt: Be more to the point in the filter driver description.Johannes Sixt
The description was meant to emphasizes that the project should remain usable even if the filter driver was not used. This makes it more explicit and removes the "here is rope to hang yourself" paraphrase. Signed-off-by: Johannes Sixt <> Signed-off-by: Junio C Hamano <>
2007-09-26gitattributes.txt: Remove a duplicated paragraph about 'ident' and 'crlf' ↵Johannes Sixt
interaction. The order in which 'ident' and 'crlf' are carried out is documented a few paragraphs later again, after 'filter' was introduced. Signed-off-by: Johannes Sixt <> Signed-off-by: Junio C Hamano <>
2007-09-07archive: rename attribute specfile to export-substRené Scharfe
As suggested by Junio and Johannes, change the name of the former attribute specfile to export-subst to indicate its function rather than purpose and to make clear that it is not applied to working tree files. Signed-off-by: Rene Scharfe <> Signed-off-by: Junio C Hamano <>
2007-09-07archive: specfile syntax change: "$Format:%PLCHLDR$" instead of just ↵René Scharfe
"%PLCHLDR" (take 2) As suggested by Johannes, --pretty=format: placeholders in specfiles need to be wrapped in $Format:...$ now. This syntax change restricts the expansion of placeholders and makes it easier to use with files that contain non-placeholder percent signs. Signed-off-by: Rene Scharfe <> Signed-off-by: Junio C Hamano <>
2007-09-03archive: specfile support (--pretty=format: in archive files)René Scharfe
Add support for a new attribute, specfile. Files marked as being specfiles are expanded by git-archive when they are written to an archive. It has no effect on worktree files. The same placeholders as those for the option --pretty=format: of git-log et al. can be used. The attribute is useful for creating auto-updating specfiles. It is limited by the underlying function format_commit_message(), though. E.g. currently there is no placeholder for git-describe like output, and expanded specfiles can't contain NUL bytes. That can be fixed in format_commit_message() later and will then benefit users of git-log, too. Signed-off-by: Rene Scharfe <> Signed-off-by: Junio C Hamano <>
2007-08-25Documentation: Correct various misspellings and typos.Brian Hetro
Fix minor typos throughout the documentation. Signed-off-by: Brian Hetro <> Signed-off-by: Junio C Hamano <>
2007-07-30Documentation/gitattributes.txt: typofixDavid Soria Parra
The file used for per-repository attribute setting is not $GIT_DIR/info/gitattributes, but $GIT_DIR/info/attributes. Signed-off-by: Junio C Hamano <>
2007-07-09Document custom hunk header selectionJunio C Hamano
Since the external interface seems to have stabilized for this new feature, let's document it properly. Acked-by: Johannes Schindelin <> Signed-off-by: Junio C Hamano <>
2007-05-15Use $Id$ as the ident attribute keyword rather than $ident$ to be consistent ↵Andy Parkins
with other VCSs $Id$ is present already in SVN and CVS; it would mean that people converting their existing repositories won't have to make any changes to the source files should they want to make use of the ident attribute. Given that it's a feature that's meant to calm those very people, it seems obtuse to make them edit every file just to make use of it. I think that bzr uses $Id$; Mercurial has examples hooks for $Id$; monotone has $Id$ on its wishlist. I can't think of a good reason not to stick with the de-facto standard and call ours $Id$ instead of $ident$. Signed-off-by: Andy Parkins <> Signed-off-by: Junio C Hamano <>
2007-04-25Add 'filter' attribute and external filter driver definition.Junio C Hamano
The interface is similar to the custom low-level merge drivers. First you configure your filter driver by defining 'filter.<name>.*' variables in the configuration. filter.<name>.clean filter command to run upon checkin filter.<name>.smudge filter command to run upon checkout Then you assign filter attribute to each path, whose name matches the custom filter driver's name. Example: (in .gitattributes) *.c filter=indent (in config) [filter "indent"] clean = indent smudge = cat Signed-off-by: Junio C Hamano <>
2007-04-25Add 'ident' conversion.Junio C Hamano
The 'ident' attribute set to path squashes "$ident:<any bytes except dollor sign>$" to "$ident$" upon checkin, and expands it to "$ident: <blob SHA-1> $" upon checkout. As we have two conversions that affect checkin/checkout paths, clarify how they interact with each other. Signed-off-by: Junio C Hamano <>
2007-04-24gitattributes documentation: clarify overridingJunio C Hamano
Signed-off-by: Junio C Hamano <>
2007-04-23Document "diff=driver" attributeJunio C Hamano
Signed-off-by: Junio C Hamano <>
2007-04-22Documentation/Makefile: fix section (5) installationJunio C Hamano
Signed-off-by: Junio C Hamano <>
2007-04-20Document gitattributes(5)Junio C Hamano
Signed-off-by: Junio C Hamano <>