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diff --git a/third_party/git/Documentation/RelNotes/2.7.0.txt b/third_party/git/Documentation/RelNotes/2.7.0.txt new file mode 100644 index 000000000000..e3cbf3a73c46 --- /dev/null +++ b/third_party/git/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 re-encode 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. |