Git 2.13 Release Notes ====================== Backward compatibility notes. * Use of an empty string as a pathspec element that is used for 'everything matches' is still warned and Git asks users to use a more explicit '.' for that instead. The hope is that existing users will not mind this change, and eventually the warning can be turned into a hard error, upgrading the deprecation into removal of this (mis)feature. That is not scheduled to happen in the upcoming release (yet). * The historical argument order "git merge HEAD ..." has been deprecated for quite some time, and is now removed. * The default location "~/.git-credential-cache/socket" for the socket used to communicate with the credential-cache daemon has been moved to "~/.cache/git/credential/socket". * Git now avoids blindly falling back to ".git" when the setup sequence said we are _not_ in Git repository. A corner case that happens to work right now may be broken by a call to die("BUG"). We've tried hard to locate such cases and fixed them, but there might still be cases that need to be addressed--bug reports are greatly appreciated. Updates since v2.12 ------------------- UI, Workflows & Features * "git describe" and "git name-rev" have been taught to take more than one refname patterns to restrict the set of refs to base their naming output on, and also learned to take negative patterns to name refs not to be used for naming via their "--exclude" option. * Deletion of a branch "foo/bar" could remove .git/refs/heads/foo once there no longer is any other branch whose name begins with "foo/", but we didn't do so so far. Now we do. * When "git merge" detects a path that is renamed in one history while the other history deleted (or modified) it, it now reports both paths to help the user understand what is going on in the two histories being merged. * The part in "http.." configuration variable can now be spelled with '*' that serves as wildcard. E.g. "http.https://*.example.com.proxy" can be used to specify the proxy used for https://a.example.com, https://b.example.com, etc., i.e. any host in the example.com domain. * "git tag" did not leave useful message when adding a new entry to reflog; this was left unnoticed for a long time because refs/tags/* doesn't keep reflog by default. * The "negative" pathspec feature was somewhat more cumbersome to use than necessary in that its short-hand used "!" which needed to be escaped from shells, and it required "exclude from what?" specified. * The command line options for ssh invocation needs to be tweaked for some implementations of SSH (e.g. PuTTY plink wants "-P " while OpenSSH wants "-p " to specify port to connect to), and the variant was guessed when GIT_SSH environment variable is used to specify it. The logic to guess now applies to the command specified by the newer GIT_SSH_COMMAND and also core.sshcommand configuration variable, and comes with an escape hatch for users to deal with misdetected cases. * The "--git-path", "--git-common-dir", and "--shared-index-path" options of "git rev-parse" did not produce usable output. They are now updated to show the path to the correct file, relative to where the caller is. * "git diff -W" has been taught to handle the case where a new function is added at the end of the file better. * "git update-ref -d" and other operations to delete references did not leave any entry in HEAD's reflog when the reference being deleted was the current branch. This is not a problem in practice because you do not want to delete the branch you are currently on, but caused renaming of the current branch to something else not to be logged in a useful way. * "Cc:" on the trailer part does not have to conform to RFC strictly, unlike in the e-mail header. "git send-email" has been updated to ignore anything after '>' when picking addresses, to allow non-address cruft like " # stable 4.4" after the address. * When "git submodule init" decides that the submodule in the working tree is its upstream, it now gives a warning as it is not a very common setup. * "git stash push" takes a pathspec so that the local changes can be stashed away only partially. * Documentation for "git ls-files" did not refer to core.quotePath. * The experimental "split index" feature has gained a few configuration variables to make it easier to use. * From a working tree of a repository, a new option of "rev-parse" lets you ask if the repository is used as a submodule of another project, and where the root level of the working tree of that project (i.e. your superproject) is. * The pathspec mechanism learned to further limit the paths that match the pattern to those that have specified attributes attached via the gitattributes mechanism. * Our source code has used the SHA1_HEADER cpp macro after "#include" in the C code to switch among the SHA-1 implementations. Instead, list the exact header file names and switch among implementations using "#ifdef BLK_SHA1/#include "block-sha1/sha1.h"/.../#endif"; this helps some IDE tools. * The start-up sequence of "git" needs to figure out some configured settings before it finds and set itself up in the location of the repository and was quite messy due to its "chicken-and-egg" nature. The code has been restructured. * The command line prompt (in contrib/) learned a new 'tag' style that can be specified with GIT_PS1_DESCRIBE_STYLE, to describe a detached HEAD with "git describe --tags". * The configuration file learned a new "includeIf..path" that includes the contents of the given path only when the condition holds. This allows you to say "include this work-related bit only in the repositories under my ~/work/ directory". * Recent update to "rebase -i" started showing a message that is not a warning with "warning:" prefix by mistake. This has been fixed. * Recently we started passing the "--push-options" through the external remote helper interface; now the "smart HTTP" remote helper understands what to do with the passed information. * "git describe --dirty" dies when it cannot be determined if the state in the working tree matches that of HEAD (e.g. broken repository or broken submodule). The command learned a new option "git describe --broken" to give "$name-broken" (where $name is the description of HEAD) in such a case. * "git checkout" is taught the "--recurse-submodules" option. * Recent enhancement to "git stash push" command to support pathspec to allow only a subset of working tree changes to be stashed away was found to be too chatty and exposed the internal implementation detail (e.g. when it uses reset to match the index to HEAD before doing other things, output from reset seeped out). These, and other chattyness has been fixed. * "git merge HEAD " syntax that has been deprecated since October 2007 has been removed. * The refs completion for large number of refs has been sped up, partly by giving up disambiguating ambiguous refs and partly by eliminating most of the shell processing between 'git for-each-ref' and 'ls-remote' and Bash's completion facility. * On many keyboards, typing "@{" involves holding down SHIFT key and one can easily end up with "@{Up..." when typing "@{upstream}". As the upstream/push keywords do not appear anywhere else in the syntax, we can safely accept them case insensitively without introducing ambiguity or confusion to solve this. Performance, Internal Implementation, Development Support etc. * The code to list branches in "git branch" has been consolidated with the more generic ref-filter API. * Resource usage while enumerating refs from alternate object store has been optimized to help receiving end of "push" that hosts a repository with many "forks". * The gitattributes machinery is being taught to work better in a multi-threaded environment. * "git rebase -i" starts using the recently updated "sequencer" code. * Code and design clean-up for the refs API. * The preload-index code has been taught not to bother with the index entries that are paths that are not checked out by "sparse checkout". * Some warning() messages from "git clean" were updated to show the errno from failed system calls. * The "parse_config_key()" API function has been cleaned up. * A test that creates a confusing branch whose name is HEAD has been corrected not to do so. * The code that parses header fields in the commit object has been updated for (micro)performance and code hygiene. * An helper function to make it easier to append the result from real_path() to a strbuf has been added. * Reduce authentication round-trip over HTTP when the server supports just a single authentication method. This also improves the behaviour when Git is misconfigured to enable http.emptyAuth against a server that does not authenticate without a username (i.e. not using Kerberos etc., which makes http.emptyAuth pointless). * Windows port wants to use OpenSSL's implementation of SHA-1 routines, so let them. * The t/perf performance test suite was not prepared to test not so old versions of Git, but now it covers versions of Git that are not so ancient. * Add 32-bit Linux variant to the set of platforms to be tested with Travis CI. * "git branch --list" takes the "--abbrev" and "--no-abbrev" options to control the output of the object name in its "-v"(erbose) output, but a recent update started ignoring them; fix it before the breakage reaches to any released version. * Picking two versions of Git and running tests to make sure the older one and the newer one interoperate happily has now become possible. * "uchar [40]" to "struct object_id" conversion continues. * "git tag --contains" used to (ab)use the object bits to keep track of the state of object reachability without clearing them after use; this has been cleaned up and made to use the newer commit-slab facility. * The "debug" helper used in the test framework learned to run a command under "gdb" interactively. * The "detect attempt to create collisions" variant of SHA-1 implementation by Marc Stevens (CWI) and Dan Shumow (Microsoft) has been integrated and made the default. * The test framework learned to detect unterminated here documents. * The name-hash used for detecting paths that are different only in cases (which matter on case insensitive filesystems) has been optimized to take advantage of multi-threading when it makes sense. * An earlier version of sha1dc/sha1.c that was merged to 'master' compiled incorrectly on Windows, which has been fixed. * "what URL do we want to update this submodule?" and "are we interested in this submodule?" are split into two distinct concepts, and then the way used to express the latter got extended, paving a way to make it easier to manage a project with many submodules and make it possible to later extend use of multiple worktrees for a project with submodules. * Some debugging output from "git describe" were marked for l10n, but some weren't. Mark missing ones for l10n. Also contains various documentation updates and code clean-ups. Fixes since v2.12 ----------------- Unless otherwise noted, all the fixes since v2.12 in the maintenance track are contained in this release (see the maintenance releases' notes for details). * "git repack --depth=" for a long time busted the specified depth when reusing delta from existing packs. This has been corrected. * The code to parse the command line "git grep ... [[--] ...]" has been cleaned up, and a handful of bugs have been fixed (e.g. we used to check "--" if it is a rev). * "git ls-remote" and "git archive --remote" are designed to work without being in a directory under Git's control. However, recent updates revealed that we randomly look into a directory called .git/ without actually doing necessary set-up when working in a repository. Stop doing so. * "git show-branch" expected there were only very short branch names in the repository and used a fixed-length buffer to hold them without checking for overflow. * A caller of tempfile API that uses stdio interface to write to files may ignore errors while writing, which is detected when tempfile is closed (with a call to ferror()). By that time, the original errno that may have told us what went wrong is likely to be long gone and was overwritten by an irrelevant value. close_tempfile() now resets errno to EIO to make errno at least predictable. * "git remote rm X", when a branch has remote X configured as the value of its branch.*.remote, tried to remove branch.*.remote and branch.*.merge and failed if either is unset. * A "gc.log" file left by a backgrounded "gc --auto" disables further automatic gc; it has been taught to run at least once a day (by default) by ignoring a stale "gc.log" file that is too old. * The code to parse "git -c VAR=VAL cmd" and set configuration variable for the duration of cmd had two small bugs, which have been fixed. * user.email that consists of only cruft chars should consistently error out, but didn't. * "git upload-pack", which is a counter-part of "git fetch", did not report a request for a ref that was not advertised as invalid. This is generally not a problem (because "git fetch" will stop before making such a request), but is the right thing to do. * A leak in a codepath to read from a packed object in (rare) cases has been plugged. * When a redirected http transport gets an error during the redirected request, we ignored the error we got from the server, and ended up giving a not-so-useful error message. * The patch subcommand of "git add -i" was meant to have paths selection prompt just like other subcommand, unlike "git add -p" directly jumps to hunk selection. Recently, this was broken and "add -i" lost the paths selection dialog, but it now has been fixed. * Git v2.12 was shipped with an embarrassing breakage where various operations that verify paths given from the user stopped dying when seeing an issue, and instead later triggering segfault. * There is no need for Python only to give a few messages to the standard error stream, but we somehow did. * The code to parse "git log -L..." command line was buggy when there are many ranges specified with -L; overrun of the allocated buffer has been fixed. * The command-line parsing of "git log -L" copied internal data structures using incorrect size on ILP32 systems. * "git diff --quiet" relies on the size field in diff_filespec to be correctly populated, but diff_populate_filespec() helper function made an incorrect short-cut when asked only to populate the size field for paths that need to go through convert_to_git() (e.g. CRLF conversion). * A few tests were run conditionally under (rare) conditions where they cannot be run (like running cvs tests under 'root' account). * "git branch @" created refs/heads/@ as a branch, and in general the code that handled @{-1} and @{upstream} was a bit too loose in disambiguating. * "git fetch" that requests a commit by object name, when the other side does not allow such an request, failed without much explanation. * "git filter-branch --prune-empty" drops a single-parent commit that becomes a no-op, but did not drop a root commit whose tree is empty. * Recent versions of Git treats http alternates (used in dumb http transport) just like HTTP redirects and requires the client to enable following it, due to security concerns. But we forgot to give a warning when we decide not to honor the alternates. * "git push" had a handful of codepaths that could lead to a deadlock when unexpected error happened, which has been fixed. * "Dumb http" transport used to misparse a nonsense http-alternates response, which has been fixed. * "git add -p " unnecessarily expanded the pathspec to a list of individual files that matches the pathspec by running "git ls-files ", before feeding it to "git diff-index" to see which paths have changes, because historically the pathspec language supported by "diff-index" was weaker. These days they are equivalent and there is no reason to internally expand it. This helps both performance and avoids command line argument limit on some platforms. (merge 7288e12cce jk/add-i-use-pathspecs later to maint). * "git status --porcelain" is supposed to give a stable output, but a few strings were left as translatable by mistake. * "git revert -m 0 $merge_commit" complained that reverting a merge needs to say relative to which parent the reversion needs to happen, as if "-m 0" weren't given. The correct diagnosis is that "-m 0" does not refer to the first parent ("-m 1" does). This has been fixed. * Code to read submodule..ignore config did not state the variable name correctly when giving an error message diagnosing misconfiguration. * Fix for NO_PTHREADS build. * Fix for potential segv introduced in v2.11.0 and later (also v2.10.2) to "git log --pickaxe-regex -S". * A few unterminated here documents in tests were fixed, which in turn revealed incorrect expectations the tests make. These tests have been updated. * Fix for NO_PTHREADS option. (merge 2225e1ea20 bw/grep-recurse-submodules later to maint). * Git now avoids blindly falling back to ".git" when the setup sequence said we are _not_ in Git repository. A corner case that happens to work right now may be broken by a call to die("BUG"). (merge b1ef400eec jk/no-looking-at-dotgit-outside-repo-final later to maint). * A few commands that recently learned the "--recurse-submodule" option misbehaved when started from a subdirectory of the superproject. (merge b2dfeb7c00 bw/recurse-submodules-relative-fix later to maint). * FreeBSD implementation of getcwd(3) behaved differently when an intermediate directory is unreadable/unsearchable depending on the length of the buffer provided, which our strbuf_getcwd() was not aware of. strbuf_getcwd() has been taught to cope with it better. (merge a54e938e5b rs/freebsd-getcwd-workaround later to maint). * A recent update to "rebase -i" stopped running hooks for the "git commit" command during "reword" action, which has been fixed. * Removing an entry from a notes tree and then looking another note entry from the resulting tree using the internal notes API functions did not work as expected. No in-tree users of the API has such access pattern, but it still is worth fixing. * "git receive-pack" could have been forced to die by attempting allocate an unreasonably large amount of memory with a crafted push certificate; this has been fixed. (merge f2214dede9 bc/push-cert-receive-fix later to maint). * Other minor doc, test and build updates and code cleanups. (merge df2a6e38b7 jk/pager-in-use later to maint). (merge 75ec4a6cb0 ab/branch-list-doc later to maint). (merge 3e5b36c637 sg/skip-prefix-in-prettify-refname later to maint). (merge 2c5e2865cc jk/fast-import-cleanup later to maint). (merge 4473060bc2 ab/test-readme-updates later to maint). (merge 48a96972fd ab/doc-submitting later to maint). (merge f5c2bc2b96 jk/make-coccicheck-detect-errors later to maint).