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 the users still may want to be aware of the changes: * Output from "git log --decorate" (and "%d" format specifier used in the userformat "--format=" parameter "git log" family of command takes) used to list "HEAD" just like other tips of branch names, separated with a comma in between. E.g. $ git log --decorate -1 master commit bdb0f6788fa5e3cacc4315e9ff318a27b2676ff4 (HEAD, master) ... This release updates the output slightly when HEAD refers to the tip of a branch whose name is also shown in the output. The above is 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 match that of "git status": - When the HEAD is at the same commit as it was originally detached, they now both show "detached at ". - When the HEAD has moved since it was originally detached, they now both show "detached from ". Earlier "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 CURLOPT_PROXYAUTH feature that may not exist. * 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 a "--atomic" option that makes push to update more than one ref an "all-or-none" affair. * Extending the "push to deploy" added in 2.3, the behaviour of "git push" when updating the branch that is checked out can now be tweaked by push-to-checkout hook. * Using environment variable LANGUAGE and friends on the client side, HTTP-based transports now send Accept-Language when making requests. * "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" to be given twice to show the differences that are left in the working tree not 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 resulting commits. * "git archive" can now be told to set the 'text' attribute in the resulting zip archive. * Output from "git log --decorate" mentions HEAD when it points at a tip of an branch differently from a detached HEAD. This is a potentially backward-incompatible change. * "git branch" on a detached HEAD always said "(detached from xyz)", even when "git status" would report "detached at xyz". The HEAD is actually at xyz and haven't been moved since it was detached in such a case, but the user cannot read what the current value of HEAD is when "detached from" is used. * "git -C '' subcmd" refused to work in the current directory, unlike "cd ''" which silently behaves as a no-op. (merge 6a536e2 kn/git-cd-to-empty later to maint). * The versionsort.prerelease configuration variable can be used to specify that 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 conflicting request that asks nonsense; no-walk tells us show discrete points in the history, while graph asks to draw connections between these discrete points. Forbid the combination. * "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 it is also forbidden for now. Performance, Internal Implementation, Development Support etc. * Implementation of N_() macro has been updated slightly to help us detect mistakes. * Implementation of "reflog expire" has been restructured to fit the reflogs better with the recently updated ref API. * The transport-helper did not give 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 the chance to honor the wish of the end-users better. * 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. (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 strbuf API was explained between the API documentation and in the header file. Move missing bits to strbuf.h so that programmers can check only one place for all necessary information. * The error handling functions and conventions are now documented in the API manual. * Optimize attribute 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 around how "the ref should be pointing at this object" is specified. * Code in "git daemon" to parse out and hold hostnames used in request interpolation has been simplified. * "git push" codepath has been restructured to make it easier to add new configuration bits. * The run-command interface was easy to abuse and make a pipe for us to read from the process, wait for the process to finish and then attempt to read its output, which is a pattern that lead to a deadlock. Fix such uses by introducing a helper to do this correctly (i.e. we need to read first 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 &&, leaving 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 told to update the working tree files and failed to do so 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 made the "--repo=" option easily misunderstood. (merge 57b92a7 mg/push-repo-option-doc later to maint). * Code to read branch name from various files in .git/ directory would have misbehaved if the code to write them left an empty file. (merge 66ec904 jk/status-read-branch-name-fix later to maint). * A misspelled conditional that is always true has been fixed. (merge 94ee8e2 jk/remote-curl-an-array-in-struct-cannot-be-null later to maint). * 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. (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 the 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 "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. (merge a9c4641 ak/add-i-empty-candidates later to maint). * The insn sheet "git rebase -i" creates 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 "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" 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. (merge afcb6ee jc/push-cert later to maint). * The completion script (in contrib/) contaminated global namespace and clobbered on a shell variable $x. (merge 852ff1c ma/bash-completion-leaking-x later to maint). * We didn't format an integer that wouldn't fit in "int" but in "uintmax_t" correctly. (merge d306f3d jk/decimal-width-for-uintmax later to maint). * Reading configuration from a blob object, when it ends with a lone CR, use to confuse the configuration parser. (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..pushURL" and "remote..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 a user name with an at-sign in it. (merge 13d261e av/wincred-with-at-in-username-fix later to maint). * "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). (merge 8d00662 jk/colors later to maint). * "git merge --quiet" did not squelch messages from the underlying merge-recursive strategy. (merge 2bf15a3 jk/merge-quiet later to maint). * Longstanding configuration variable naming rules has been added to the documentation. (merge 35840a3 jc/conf-var-doc later to maint). * 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. (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 in a subdirectory. (merge 204a8ff ab/merge-file-prefix later to maint). * "git blame" died, 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 conclude the resulting packfile cleanly. (merge 5e915f3 jk/fast-import-die-nicely-fix later to maint). * "update-index --refresh" used to leak when an entry cannot 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 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" looked up the hostname even when "%CH" and "%IP" interpolations are not requested, which was unnecessary. (merge dc8edc8 rs/daemon-interpolate later to maint). * 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. (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). * A breakage to git-svn around v2.2 era that triggers premature closing of FileHandle has been corrected. (merge e426311 ew/svn-maint-fixes later to maint). * 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. (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 --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. (merge ab27389 mk/diff-shortstat-dirstat-fix later to maint). * "git remote add" mentioned "--tags" and "--no-tags" and was not clear that fetch from the remote in the future will use the default behaviour when neither is given to override it. (merge aaba0ab mg/doc-remote-tags-or-not later to maint). * Description given by "grep -h" for its --exclude-standard option 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 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. (merge 2185d3b es/rebase-i-count-todo later to maint). * The borrowed code in 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 NO_OPENSSL option, use that codepath by default under such configuration. (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). * "git tag -h" used to show the "--column" and "--sort" options that are about listing in a wrong 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 spread an existing small damage and make it a larger one. (merge ea56c4e jk/prune-with-corrupt-refs later to maint). * 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. (merge 03f15a7 tg/fix-check-order-with-split-index later to maint). * "git fetch" that fetches a commit using the allow-tip-sha1-in-want extension could have failed to fetch all 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 some directories and files left without getting cleaned up. (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). * Even though "git grep --quiet" is run merely to ask for the exit status, we spawned the pager regardless. Stop doing that. (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 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. (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).