399 lines
18 KiB
Plaintext
399 lines
18 KiB
Plaintext
Git 2.17 Release Notes
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======================
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Updates since v2.16
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-------------------
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UI, Workflows & Features
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* "diff" family of commands learned "--find-object=<object-id>" option
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to limit the findings to changes that involve the named object.
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* "git format-patch" learned to give 72-cols to diffstat, which is
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consistent with other line length limits the subcommand uses for
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its output meant for e-mails.
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* The log from "git daemon" can be redirected with a new option; one
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relevant use case is to send the log to standard error (instead of
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syslog) when running it from inetd.
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* "git rebase" learned to take "--allow-empty-message" option.
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* "git am" has learned the "--quit" option, in addition to the
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existing "--abort" option; having the pair mirrors a few other
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commands like "rebase" and "cherry-pick".
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* "git worktree add" learned to run the post-checkout hook, just like
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"git clone" runs it upon the initial checkout.
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* "git tag" learned an explicit "--edit" option that allows the
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message given via "-m" and "-F" to be further edited.
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* "git fetch --prune-tags" may be used as a handy short-hand for
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getting rid of stale tags that are locally held.
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* The new "--show-current-patch" option gives an end-user facing way
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to get the diff being applied when "git rebase" (and "git am")
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stops with a conflict.
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* "git add -p" used to offer "/" (look for a matching hunk) as a
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choice, even there was only one hunk, which has been corrected.
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Also the single-key help is now given only for keys that are
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enabled (e.g. help for '/' won't be shown when there is only one
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hunk).
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* Since Git 1.7.9, "git merge" defaulted to --no-ff (i.e. even when
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the side branch being merged is a descendant of the current commit,
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create a merge commit instead of fast-forwarding) when merging a
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tag object. This was appropriate default for integrators who pull
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signed tags from their downstream contributors, but caused an
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unnecessary merges when used by downstream contributors who
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habitually "catch up" their topic branches with tagged releases
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from the upstream. Update "git merge" to default to --no-ff only
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when merging a tag object that does *not* sit at its usual place in
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refs/tags/ hierarchy, and allow fast-forwarding otherwise, to
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mitigate the problem.
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* "git status" can spend a lot of cycles to compute the relation
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between the current branch and its upstream, which can now be
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disabled with "--no-ahead-behind" option.
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* "git diff" and friends learned funcname patterns for Go language
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source files.
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* "git send-email" learned "--reply-to=<address>" option.
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* Funcname pattern used for C# now recognizes "async" keyword.
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* In a way similar to how "git tag" learned to honor the pager
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setting only in the list mode, "git config" learned to ignore the
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pager setting when it is used for setting values (i.e. when the
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purpose of the operation is not to "show").
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Performance, Internal Implementation, Development Support etc.
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* More perf tests for threaded grep
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* "perf" test output can be sent to codespeed server.
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* The build procedure for perl/ part has been greatly simplified by
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weaning ourselves off of MakeMaker.
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* Perl 5.8 or greater has been required since Git 1.7.4 released in
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2010, but we continued to assume some core modules may not exist and
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used a conditional "eval { require <<module>> }"; we no longer do
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this. Some platforms (Fedora/RedHat/CentOS, for example) ship Perl
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without all core modules by default (e.g. Digest::MD5, File::Temp,
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File::Spec, Net::Domain, Net::SMTP). Users on such platforms may
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need to install these additional modules.
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* As a convenience, we install copies of Perl modules we require which
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are not part of the core Perl distribution (e.g. Error and
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Mail::Address). Users and packagers whose operating system provides
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these modules can set NO_PERL_CPAN_FALLBACKS to avoid installing the
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bundled modules.
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* In preparation for implementing narrow/partial clone, the machinery
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for checking object connectivity used by gc and fsck has been
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taught that a missing object is OK when it is referenced by a
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packfile specially marked as coming from trusted repository that
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promises to make them available on-demand and lazily.
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* The machinery to clone & fetch, which in turn involves packing and
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unpacking objects, has been told how to omit certain objects using
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the filtering mechanism introduced by another topic. It now knows
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to mark the resulting pack as a promisor pack to tolerate missing
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objects, laying foundation for "narrow" clones.
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* The first step to getting rid of mru API and using the
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doubly-linked list API directly instead.
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* Retire mru API as it does not give enough abstraction over
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underlying list API to be worth it.
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* Rewrite two more "git submodule" subcommands in C.
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* The tracing machinery learned to report tweaking of environment
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variables as well.
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* Update Coccinelle rules to catch and optimize strbuf_addf(&buf, "%s", str)
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* Prevent "clang-format" from breaking line after function return type.
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* The sequencer infrastructure is shared across "git cherry-pick",
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"git rebase -i", etc., and has always spawned "git commit" when it
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needs to create a commit. It has been taught to do so internally,
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when able, by reusing the codepath "git commit" itself uses, which
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gives performance boost for a few tens of percents in some sample
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scenarios.
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* Push the submodule version of collision-detecting SHA-1 hash
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implementation a bit harder on builders.
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* Avoid mmapping small files while using packed refs (especially ones
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with zero size, which would cause later munmap() to fail).
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* Conversion from uchar[20] to struct object_id continues.
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* More tests for wildmatch functions.
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* The code to binary search starting from a fan-out table (which is
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how the packfile is indexed with object names) has been refactored
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into a reusable helper.
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* We now avoid using identifiers that clash with C++ keywords. Even
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though it is not a goal to compile Git with C++ compilers, changes
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like this help use of code analysis tools that targets C++ on our
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codebase.
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* The executable is now built in 'script' phase in Travis CI integration,
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to follow the established practice, rather than during 'before_script'
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phase. This allows the CI categorize the failures better ('failed'
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is project's fault, 'errored' is build environment's).
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(merge 3c93b82920 sg/travis-build-during-script-phase later to maint).
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* Writing out the index file when the only thing that changed in it
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is the untracked cache information is often wasteful, and this has
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been optimized out.
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* Various pieces of Perl code we have have been cleaned up.
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* Internal API clean-up to allow write_locked_index() optionally skip
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writing the in-core index when it is not modified.
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Also contains various documentation updates and code clean-ups.
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Fixes since v2.16
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-----------------
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* An old regression in "git describe --all $annotated_tag^0" has been
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fixed.
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* "git status" after moving a path in the working tree (hence making
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it appear "removed") and then adding with the -N option (hence
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making that appear "added") detected it as a rename, but did not
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report the old and new pathnames correctly.
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* "git svn dcommit" did not take into account the fact that a
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svn+ssh:// URL with a username@ (typically used for pushing) refers
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to the same SVN repository without the username@ and failed when
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svn.pushmergeinfo option is set.
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* API clean-up around revision traversal.
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* "git merge -Xours/-Xtheirs" learned to use our/their version when
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resolving a conflicting updates to a symbolic link.
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* "git clone $there $here" is allowed even when here directory exists
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as long as it is an empty directory, but the command incorrectly
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removed it upon a failure of the operation.
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* "git commit --fixup" did not allow "-m<message>" option to be used
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at the same time; allow it to annotate resulting commit with more
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text.
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* When resetting the working tree files recursively, the working tree
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of submodules are now also reset to match.
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* "git stash -- <pathspec>" incorrectly blew away untracked files in
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the directory that matched the pathspec, which has been corrected.
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* Instead of maintaining home-grown email address parsing code, ship
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a copy of reasonably recent Mail::Address to be used as a fallback
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in 'git send-email' when the platform lacks it.
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(merge d60be8acab mm/send-email-fallback-to-local-mail-address later to maint).
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* "git add -p" was taught to ignore local changes to submodules as
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they do not interfere with the partial addition of regular changes
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anyway.
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* Avoid showing a warning message in the middle of a line of "git
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diff" output.
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(merge 4e056c989f nd/diff-flush-before-warning later to maint).
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* The http tracing code, often used to debug connection issues,
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learned to redact potentially sensitive information from its output
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so that it can be more safely shareable.
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(merge 8ba18e6fa4 jt/http-redact-cookies later to maint).
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* Crash fix for a corner case where an error codepath tried to unlock
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what it did not acquire lock on.
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(merge 81fcb698e0 mr/packed-ref-store-fix later to maint).
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* The split-index mode had a few corner case bugs fixed.
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(merge ae59a4e44f tg/split-index-fixes later to maint).
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* Assorted fixes to "git daemon".
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(merge ed15e58efe jk/daemon-fixes later to maint).
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* Completion of "git merge -s<strategy>" (in contrib/) did not work
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well in non-C locale.
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(merge 7cc763aaa3 nd/list-merge-strategy later to maint).
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* Workaround for segfault with more recent versions of SVN.
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(merge 7f6f75e97a ew/svn-branch-segfault-fix later to maint).
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* Plug recently introduced leaks in fsck.
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(merge ba3a08ca0e jt/fsck-code-cleanup later to maint).
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* "git pull --rebase" did not pass verbosity setting down when
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recursing into a submodule.
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(merge a56771a668 sb/pull-rebase-submodule later to maint).
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* The way "git reset --hard" reports the commit the updated HEAD
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points at is made consistent with the way how the commit title is
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generated by the other parts of the system. This matters when the
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title is spread across physically multiple lines.
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(merge 1cf823fb68 tg/reset-hard-show-head-with-pretty later to maint).
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* Test fixes.
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(merge 63b1a175ee sg/test-i18ngrep later to maint).
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* Some bugs around "untracked cache" feature have been fixed. This
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will notice corrupt data in the untracked cache left by old and
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buggy code and issue a warning---the index can be fixed by clearing
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the untracked cache from it.
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(merge 0cacebf099 nd/fix-untracked-cache-invalidation later to maint).
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(merge 7bf0be7501 ab/untracked-cache-invalidation-docs later to maint).
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* "git blame HEAD COPYING" in a bare repository failed to run, while
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"git blame HEAD -- COPYING" run just fine. This has been corrected.
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* "git add" files in the same directory, but spelling the directory
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path in different cases on case insensitive filesystem, corrupted
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the name hash data structure and led to unexpected results. This
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has been corrected.
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(merge c95525e90d bp/name-hash-dirname-fix later to maint).
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* "git rebase -p" mangled log messages of a merge commit, which is
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now fixed.
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(merge ed5144d7eb js/fix-merge-arg-quoting-in-rebase-p later to maint).
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* Some low level protocol codepath could crash when they get an
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unexpected flush packet, which is now fixed.
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(merge bb1356dc64 js/packet-read-line-check-null later to maint).
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* "git check-ignore" with multiple paths got confused when one is a
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file and the other is a directory, which has been fixed.
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(merge d60771e930 rs/check-ignore-multi later to maint).
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* "git describe $garbage" stopped giving any errors when the garbage
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happens to be a string with 40 hexadecimal letters.
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(merge a8e7a2bf0f sb/describe-blob later to maint).
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* Code to unquote single-quoted string (used in the parser for
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configuration files, etc.) did not diagnose bogus input correctly
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and produced bogus results instead.
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(merge ddbbf8eb25 jk/sq-dequote-on-bogus-input later to maint).
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* Many places in "git apply" knew that "/dev/null" that signals
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"there is no such file on this side of the diff" can be followed by
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whitespace and garbage when parsing a patch, except for one, which
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made an otherwise valid patch (e.g. ones from subversion) rejected.
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(merge e454ad4bec tk/apply-dev-null-verify-name-fix later to maint).
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* We no longer create any *.spec file, so "make clean" should not
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remove it.
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(merge 4321bdcabb tz/do-not-clean-spec-file later to maint).
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* "git push" over http transport did not unquote the push-options
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correctly.
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(merge 90dce21eb0 jk/push-options-via-transport-fix later to maint).
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* "git send-email" learned to complain when the batch-size option is
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not defined when the relogin-delay option is, since these two are
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mutually required.
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(merge 9caa70697b xz/send-email-batch-size later to maint).
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* Y2k20 fix ;-) for our perl scripts.
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(merge a40e06ee33 bw/perl-timegm-timelocal-fix later to maint).
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* Threaded "git grep" has been optimized to avoid allocation in code
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section that is covered under a mutex.
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(merge 38ef24dccf rv/grep-cleanup later to maint).
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* "git subtree" script (in contrib/) scripted around "git log", whose
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output got affected by end-user configuration like log.showsignature
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(merge 8841b5222c sg/subtree-signed-commits later to maint).
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* While finding unique object name abbreviation, the code may
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accidentally have read beyond the end of the array of object names
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in a pack.
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(merge 21abed500c ds/find-unique-abbrev-optim later to maint).
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* Micro optimization in revision traversal code.
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(merge ebbed3ba04 ds/mark-parents-uninteresting-optim later to maint).
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* "git commit" used to run "gc --auto" near the end, which was lost
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when the command was reimplemented in C by mistake.
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(merge 095c741edd ab/gc-auto-in-commit later to maint).
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* Allow running a couple of tests with "sh -x".
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(merge c20bf94abc sg/cvs-tests-with-x later to maint).
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* The codepath to replace an existing entry in the index had a bug in
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updating the name hash structure, which has been fixed.
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(merge 0e267b7a24 bp/refresh-cache-ent-rehash-fix later to maint).
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* The transfer.fsckobjects configuration tells "git fetch" to
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validate the data and connected-ness of objects in the received
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pack; the code to perform this check has been taught about the
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narrow clone's convention that missing objects that are reachable
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from objects in a pack that came from a promisor remote is OK.
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* There was an unused file-scope static variable left in http.c when
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building for versions of libCURL that is older than 7.19.4, which
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has been fixed.
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(merge b8fd6008ec rj/http-code-cleanup later to maint).
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* Shell script portability fix.
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(merge 206a6ae013 ml/filter-branch-portability-fix later to maint).
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* Other minor doc, test and build updates and code cleanups.
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(merge e2a5a028c7 bw/oidmap-autoinit later to maint).
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(merge ec3b4b06f8 cl/t9001-cleanup later to maint).
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(merge e1b3f3dd38 ks/submodule-doc-updates later to maint).
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(merge fbac558a9b rs/describe-unique-abbrev later to maint).
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(merge 8462ff43e4 tb/crlf-conv-flags later to maint).
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(merge 7d68bb0766 rb/hashmap-h-compilation-fix later to maint).
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(merge 3449847168 cc/sha1-file-name later to maint).
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(merge ad622a256f ds/use-get-be64 later to maint).
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(merge f919ffebed sg/cocci-move-array later to maint).
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(merge 4e801463c7 jc/mailinfo-cleanup-fix later to maint).
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(merge ef5b3a6c5e nd/shared-index-fix later to maint).
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(merge 9f5258cbb8 tz/doc-show-defaults-to-head later to maint).
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(merge b780e4407d jc/worktree-add-short-help later to maint).
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(merge ae239fc8e5 rs/cocci-strbuf-addf-to-addstr later to maint).
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(merge 2e22a85e5c nd/ignore-glob-doc-update later to maint).
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(merge 3738031581 jk/gettext-poison later to maint).
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(merge 54360a1956 rj/sparse-updates later to maint).
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(merge 12e31a6b12 sg/doc-test-must-fail-args later to maint).
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(merge 760f1ad101 bc/doc-interpret-trailers-grammofix later to maint).
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(merge 4ccf461f56 bp/fsmonitor later to maint).
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(merge a6119f82b1 jk/test-hashmap-updates later to maint).
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(merge 5aea9fe6cc rd/typofix later to maint).
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(merge e4e5da2796 sb/status-doc-fix later to maint).
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(merge 7976e901c8 gs/test-unset-xdg-cache-home later to maint).
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(merge d023df1ee6 tg/worktree-create-tracking later to maint).
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(merge 4cbe92fd41 sm/mv-dry-run-update later to maint).
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(merge 75e5e9c3f7 sb/color-h-cleanup later to maint).
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(merge 2708ef4af6 sg/t6300-modernize later to maint).
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(merge d88e92d4e0 bw/doc-submodule-recurse-config-with-clone later to maint).
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(merge f74bbc8dd2 jk/cached-commit-buffer later to maint).
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(merge 1316416903 ms/non-ascii-ticks later to maint).
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(merge 878056005e rs/strbuf-read-file-or-whine later to maint).
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(merge 79f0ba1547 jk/strbuf-read-file-close-error later to maint).
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(merge edfb8ba068 ot/ref-filter-cleanup later to maint).
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(merge 11395a3b4b jc/test-must-be-empty later to maint).
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(merge 768b9d6db7 mk/doc-pretty-fill later to maint).
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(merge 2caa7b8d27 ab/man-sec-list later to maint).
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(merge 40c17eb184 ks/t3200-typofix later to maint).
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(merge bd9958c358 dp/merge-strategy-doc-fix later to maint).
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(merge 9ee0540a40 js/ming-strftime later to maint).
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(merge 1775e990f7 tz/complete-tag-delete-tagname later to maint).
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(merge 00a4b03501 rj/warning-uninitialized-fix later to maint).
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(merge b635ed97a0 jk/attributes-path-doc later to maint).
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