341 lines
14 KiB
Plaintext
341 lines
14 KiB
Plaintext
Git 2.16 Release Notes
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======================
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Backward compatibility notes and other notable changes.
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* Use of an empty string as a pathspec element that is used for
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'everything matches' is now an error.
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Updates since v2.15
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-------------------
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UI, Workflows & Features
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* An empty string as a pathspec element that means "everything"
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i.e. 'git add ""', is now illegal. We started this by first
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deprecating and warning a pathspec that has such an element in
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2.11 (Nov 2016).
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* A hook script that is set unexecutable is simply ignored. Git
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notifies when such a file is ignored, unless the message is
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squelched via advice.ignoredHook configuration.
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* "git pull" has been taught to accept "--[no-]signoff" option and
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pass it down to "git merge".
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* The "--push-option=<string>" option to "git push" now defaults to a
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list of strings configured via push.pushOption variable.
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* "gitweb" checks if a directory is searchable with Perl's "-x"
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operator, which can be enhanced by using "filetest 'access'"
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pragma, which now we do.
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* "git stash save" has been deprecated in favour of "git stash push".
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* The set of paths output from "git status --ignored" was tied
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closely with its "--untracked=<mode>" option, but now it can be
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controlled more flexibly. Most notably, a directory that is
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ignored because it is listed to be ignored in the ignore/exclude
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mechanism can be handled differently from a directory that ends up
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to be ignored only because all files in it are ignored.
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* The remote-helper for talking to MediaWiki has been updated to
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truncate an overlong pagename so that ".mw" suffix can still be
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added.
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* The remote-helper for talking to MediaWiki has been updated to
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work with mediawiki namespaces.
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* The "--format=..." option "git for-each-ref" takes learned to show
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the name of the 'remote' repository and the ref at the remote side
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that is affected for 'upstream' and 'push' via "%(push:remotename)"
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and friends.
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* Doc and message updates to teach users "bisect view" is a synonym
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for "bisect visualize".
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* "git bisect run" that did not specify any command to run used to go
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ahead and treated all commits to be tested as 'good'. This has
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been corrected by making the command error out.
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* The SubmittingPatches document has been converted to produce an
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HTML version via AsciiDoc/Asciidoctor.
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* We learned to talk to watchman to speed up "git status" and other
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operations that need to see which paths have been modified.
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* The "diff" family of commands learned to ignore differences in
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carriage return at the end of line.
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* Places that know about "sendemail.to", like documentation and shell
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completion (in contrib/) have been taught about "sendemail.tocmd",
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too.
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* "git add --renormalize ." is a new and safer way to record the fact
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that you are correcting the end-of-line convention and other
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"convert_to_git()" glitches in the in-repository data.
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* "git branch" and "git checkout -b" are now forbidden from creating
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a branch whose name is "HEAD".
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* "git branch --list" learned to show its output through the pager by
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default when the output is going to a terminal, which is controlled
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by the pager.branch configuration variable. This is similar to a
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recent change to "git tag --list".
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* "git grep -W", "git diff -W" and their friends learned a heuristic
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to extend a pre-context beyond the line that matches the "function
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pattern" (aka "diff.*.xfuncname") to include a comment block, if
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exists, that immediately precedes it.
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* "git config --expiry-date gc.reflogexpire" can read "2.weeks" from
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the configuration and report it as a timestamp, just like "--int"
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would read "1k" and report 1024, to help consumption by scripts.
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* The shell completion (in contrib/) learned that "git pull" can take
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the "--autostash" option.
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* The tagnames "git log --decorate" uses to annotate the commits can
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now be limited to subset of available refs with the two additional
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options, --decorate-refs[-exclude]=<pattern>.
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* "git grep" compiled with libpcre2 sometimes triggered a segfault,
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which is being fixed.
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* "git send-email" tries to see if the sendmail program is available
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in /usr/lib and /usr/sbin; extend the list of locations to be
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checked to also include directories on $PATH.
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Performance, Internal Implementation, Development Support etc.
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* An earlier update made it possible to use an on-stack in-core
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lockfile structure (as opposed to having to deliberately leak an
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on-heap one). Many codepaths have been updated to take advantage
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of this new facility.
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* Calling cmd_foo() as if it is a general purpose helper function is
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a no-no. Correct two instances of such to set an example.
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* We try to see if somebody runs our test suite with a shell that
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does not support "local" like bash/dash does.
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* An early part of piece-by-piece rewrite of "git bisect" in C.
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* GSoC to piece-by-piece rewrite "git submodule" in C.
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* Optimize the code to find shortest unique prefix of object names.
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* Pathspec-limited revision traversal was taught not to keep finding
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unneeded differences once it knows two trees are different inside
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given pathspec.
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* Conversion from uchar[20] to struct object_id continues.
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* Code cleanup.
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* A single-word "unsigned flags" in the diff options is being split
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into a structure with many bitfields.
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* TravisCI build updates.
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* Parts of a test to drive the long-running content filter interface
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has been split into its own module, hopefully to eventually become
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reusable.
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* Drop (perhaps overly cautious) sanity check before using the index
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read from the filesystem at runtime.
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* The build procedure has been taught to avoid some unnecessary
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instability in the build products.
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* A new mechanism to upgrade the wire protocol in place is proposed
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and demonstrated that it works with the older versions of Git
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without harming them.
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* An infrastructure to define what hash function is used in Git is
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introduced, and an effort to plumb that throughout various
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codepaths has been started.
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* The code to iterate over loose object files got optimized.
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* An internal function that was left for backward compatibility has
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been removed, as there is no remaining callers.
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Also contains various documentation updates and code clean-ups.
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Fixes since v2.15
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-----------------
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* "auto" as a value for the columnar output configuration ought to
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judge "is the output consumed by humans?" with the same criteria as
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"auto" for coloured output configuration, i.e. either the standard
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output stream is going to tty, or a pager is in use. We forgot the
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latter, which has been fixed.
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* The experimental "color moved lines differently in diff output"
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feature was buggy around "ignore whitespace changes" edges, which
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has been corrected.
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* Instead of using custom line comparison and hashing functions to
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implement "moved lines" coloring in the diff output, use the pair
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of these functions from lower-layer xdiff/ code.
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* Some codepaths did not check for errors when asking what branch the
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HEAD points at, which have been fixed.
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* "git commit", after making a commit, did not check for errors when
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asking on what branch it made the commit, which has been corrected.
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* "git status --ignored -u" did not stop at a working tree of a
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separate project that is embedded in an ignored directory and
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listed files in that other project, instead of just showing the
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directory itself as ignored.
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* A broken access to object databases in recent update to "git grep
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--recurse-submodules" has been fixed.
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* A recent regression in "git rebase -i" that broke execution of git
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commands from subdirectories via "exec" instruction has been fixed.
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* A (possibly flakey) test fix.
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* "git check-ref-format --branch @{-1}" bit a "BUG()" when run
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outside a repository for obvious reasons; clarify the documentation
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and make sure we do not even try to expand the at-mark magic in
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such a case, but still call the validation logic for branch names.
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* "git fetch --recurse-submodules" now knows that submodules can be
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moved around in the superproject in addition to getting updated,
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and finds the ones that need to be fetched accordingly.
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* Command line completion (in contrib/) update.
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* Description of blame.{showroot,blankboundary,showemail,date}
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configuration variables have been added to "git config --help".
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* After an error from lstat(), diff_populate_filespec() function
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sometimes still went ahead and used invalid data in struct stat,
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which has been fixed.
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* UNC paths are also relevant in Cygwin builds and they are now
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tested just like Mingw builds.
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* Correct start-up sequence so that a repository could be placed
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immediately under the root directory again (which was broken at
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around Git 2.13).
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* The credential helper for libsecret (in contrib/) has been improved
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to allow possibly prompting the end user to unlock secrets that are
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currently locked (otherwise the secrets may not be loaded).
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* MinGW updates.
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* Error checking in "git imap-send" for empty response has been
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improved.
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* Recent update to the refs infrastructure implementation started
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rewriting packed-refs file more often than before; this has been
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optimized again for most trivial cases.
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* Some error messages did not quote filenames shown in it, which have
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been fixed.
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* "git rebase -i" recently started misbehaving when a submodule that
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is configured with 'submodule.<name>.ignore' is dirty; this has
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been corrected.
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* Building with NO_LIBPCRE1_JIT did not disable it, which has been fixed.
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* We used to add an empty alternate object database to the system
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that does not help anything; it has been corrected.
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* Doc update around use of "format-patch --subject-prefix" etc.
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* A fix for an ancient bug in "git apply --ignore-space-change" codepath.
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* Clarify and enhance documentation for "merge-base --fork-point", as
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it was clear what it computed but not why/what for.
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* A few scripts (both in production and tests) incorrectly redirected
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their error output. These have been corrected.
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* "git notes" sent its error message to its standard output stream,
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which was corrected.
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* The three-way merge performed by "git cherry-pick" was confused
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when a new submodule was added in the meantime, which has been
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fixed (or "papered over").
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* The sequencer machinery (used by "git cherry-pick A..B", and "git
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rebase -i", among other things) would have lost a commit if stopped
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due to an unlockable index file, which has been fixed.
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* "git apply --inaccurate-eof" when used with "--ignore-space-change"
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triggered an internal sanity check, which has been fixed.
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* Command line completion (in contrib/) has been taught about the
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"--copy" option of "git branch".
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* When "git rebase" prepared an mailbox of changes and fed it to "git
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am" to replay them, it was confused when a stray "From " happened
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to be in the log message of one of the replayed changes. This has
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been corrected.
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* There was a recent semantic mismerge in the codepath to write out a
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section of a configuration section, which has been corrected.
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* Mentions of "git-rebase" and "git-am" (dashed form) still remained
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in end-user visible strings emitted by the "git rebase" command;
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they have been corrected.
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* Contrary to the documentation, "git pull -4/-6 other-args" did not
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ask the underlying "git fetch" to go over IPv4/IPv6, which has been
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corrected.
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* "git checkout --recursive" may overwrite and rewind the history of
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the branch that happens to be checked out in submodule
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repositories, which might not be desirable. Detach the HEAD but
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still allow the recursive checkout to succeed in such a case.
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(merge 57f22bf997 sb/submodule-recursive-checkout-detach-head later to maint).
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* "git branch --set-upstream" has been deprecated and (sort of)
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removed, as "--set-upstream-to" is the preferred one these days.
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The documentation still had "--set-upstream" listed on its
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synopsys section, which has been corrected.
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(merge a060f3d3d8 tz/branch-doc-remove-set-upstream later to maint).
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* Internaly we use 0{40} as a placeholder object name to signal the
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codepath that there is no such object (e.g. the fast-forward check
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while "git fetch" stores a new remote-tracking ref says "we know
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there is no 'old' thing pointed at by the ref, as we are creating
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it anew" by passing 0{40} for the 'old' side), and expect that a
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codepath to locate an in-core object to return NULL as a sign that
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the object does not exist. A look-up for an object that does not
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exist however is quite costly with a repository with large number
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of packfiles. This access pattern has been optimized.
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(merge 87b5e236a1 jk/fewer-pack-rescan later to maint).
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* In addition to "git stash -m message", the command learned to
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accept "git stash -mmessage" form.
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(merge 5675473fcb ph/stash-save-m-option-fix later to maint).
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* @{-N} in "git checkout @{-N}" may refer to a detached HEAD state,
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but the documentation was not clear about it, which has been fixed.
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(merge 75ce149575 ks/doc-checkout-previous later to maint).
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* A regression in the progress eye-candy was fixed.
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(merge 9c5951cacf jk/progress-delay-fix later to maint).
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* Other minor doc, test and build updates and code cleanups.
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(merge 1a1fc2d5b5 rd/man-prune-progress later to maint).
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(merge 0ba014035a rd/man-reflog-add-n later to maint).
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(merge e54b63359f rd/doc-notes-prune-fix later to maint).
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(merge ff4c9b413a sp/doc-info-attributes later to maint).
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(merge 7db2cbf4f1 jc/receive-pack-hook-doc later to maint).
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(merge 5a0526264b tg/t-readme-updates later to maint).
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(merge 5e83cca0b8 jk/no-optional-locks later to maint).
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(merge 826c778f7c js/hashmap-update-sample later to maint).
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