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![Marc Branchaud](/assets/img/avatar_default.png)
Signed-off-by: Marc Branchaud <marcnarc@xiplink.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
314 lines
13 KiB
Plaintext
314 lines
13 KiB
Plaintext
Git v2.2 Release Notes
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======================
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Updates since v2.1
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------------------
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Ports
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* Building on older MacOS X systems automatically sets
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the necessary NO_APPLE_COMMON_CRYPTO build-time option.
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* Building with NO_PTHREADS has been resurrected.
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* Compilation options have been updated a bit to better support the
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z/OS port.
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UI, Workflows & Features
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* "git archive" learned to filter what gets archived with a pathspec.
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* "git config --edit --global" starts from a skeletal per-user
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configuration file contents, instead of a total blank, when the
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user does not already have any global config. This immediately
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reduces the need to later ask "Have you forgotten to set
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core.user?", and we can add more to the template as we gain
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more experience.
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* "git stash list -p" used to be almost always a no-op because each
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stash entry is represented as a merge commit. It learned to show
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the difference between the base commit version and the working tree
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version, which is in line with what "git stash show" gives.
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* Sometimes users want to report a bug they experience on their
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repository, but they are not at liberty to share the contents of
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the repository. "fast-export" was taught an "--anonymize" option
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to replace blob contents, names of people, paths and log
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messages with bland and simple strings to help them.
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* "git difftool" learned an option to stop feeding paths to the
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diff backend when it exits with a non-zero status.
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* "git grep" learned to paint (or not paint) partial matches on
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context lines when showing "grep -C<num>" output in color.
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* "log --date=iso" uses a slight variant of the ISO 8601 format that is
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more human readable. A new "--date=iso-strict" option gives
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datetime output that conforms more strictly.
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* The logic "git prune" uses is more resilient against various corner
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cases.
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* A broken reimplementation of Git could write an invalid index that
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records both stage #0 and higher-stage entries for the same path.
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We now notice and reject such an index, as there is no sensible
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fallback (we do not know if the broken tool wanted to resolve and
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forgot to remove the higher-stage entries, or if it wanted to unresolve
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and forgot to remove the stage #0 entry).
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* The temporary files "git mergetool" uses are renamed to avoid too
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many dots in them (e.g. a temporary file for "hello.c" used to be
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named e.g. "hello.BASE.4321.c" but now uses underscore instead,
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e.g. "hello_BASE_4321.c", to allow us to have multiple variants).
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* The temporary files "git mergetool" uses can be placed in a newly
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created temporary directory, instead of the current directory, by
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setting the mergetool.writeToTemp configuration variable.
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* "git mergetool" understands "--tool bc" now, as version 4 of
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BeyondCompare can be driven the same way as its version 3 and it
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feels awkward to say "--tool bc3" to run version 4.
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* The "pre-receive" and "post-receive" hooks are no longer required
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to consume their input fully (not following this requirement used
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to result in intermittent errors in "git push").
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* The pretty-format specifier "%d", which expands to " (tagname)"
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for a tagged commit, gained a cousin "%D" that just gives the
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"tagname" without frills.
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* "git push" learned "--signed" push, that allows a push (i.e.
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request to update the refs on the other side to point at a new
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history, together with the transmission of necessary objects) to be
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signed, so that it can be verified and audited, using the GPG
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signature of the person who pushed, that the tips of branches at a
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public repository really point the commits the pusher wanted to,
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without having to "trust" the server.
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* "git interpret-trailers" is a new filter to programmatically edit
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the tail end of the commit log messages, e.g. "Signed-off-by:".
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* "git help everyday" shows the "Everyday Git in 20 commands or so"
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document, whose contents have been updated to match more modern
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Git practice.
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* On the "git svn" front, work progresses to reduce memory consumption and
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to improve handling of mergeinfo.
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Performance, Internal Implementation, Development Support etc.
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* The API to manipulate the "refs" has been restructured to make it
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more transactional, with the eventual goal to allow all-or-none
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atomic updates and migrating the storage to something other than
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the traditional filesystem based one (e.g. databases).
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* The lockfile API and its users have been cleaned up.
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* We no longer attempt to keep track of individual dependencies to
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the header files in the build procedure, relying instead on automated
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dependency generation support from modern compilers.
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* In tests, we have been using NOT_{MINGW,CYGWIN} test prerequisites
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long before negated prerequisites e.g. !MINGW were invented.
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The former has been converted to the latter to avoid confusion.
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* Optimized looking up a remote's configuration in a repository with very many
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remotes defined.
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* There are cases where you lock and open to write a file, close it
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to show the updated contents to an external processes, and then have
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to update the file again while still holding the lock; now the
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lockfile API has support for such an access pattern.
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* The API to allocate the structure to keep track of commit
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decoration has been updated to make it less cumbersome to use.
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* An in-core caching layer to let us avoid reading the same
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configuration files several times has been added. A few commands
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have been converted to use this subsystem.
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* Various code paths have been cleaned up and simplified by using
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the "strbuf", "starts_with()", and "skip_prefix()" APIs more.
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* A few codepaths that died when large blobs that would not fit in
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core are involved in their operation have been taught to punt
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instead, by e.g. marking a too-large blob as not to be diffed.
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* A few more code paths in "commit" and "checkout" have been taught
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to repopulate the cache-tree in the index, to help speed up later
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"write-tree" (used in "commit") and "diff-index --cached" (used in
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"status").
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* A common programming mistake to assign the same short option name
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to two separate options is detected by the parse_options() API to help
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developers.
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* The code path to write out the packed-refs file has been optimized,
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which especially matters in a repository with a large number of
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refs.
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* The check to see if a ref $F can be created by making sure no
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existing ref has $F/ as its prefix has been optimized, which
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especially matters in a repository with a large number of existing
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refs.
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* "git fsck" was taught to check the contents of tag objects a bit more.
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* "git hash-object" was taught a "--literally" option to help
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debugging.
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* When running a required clean filter, we do not have to mmap the
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original before feeding the filter. Instead, stream the file
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contents directly to the filter and process its output.
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* The scripts in the test suite can be run with the "-x" option to show
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a shell-trace of each command they run.
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* The "run-command" API learned to manage the argv and environment
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arrays for child process, alleviating the need for the callers to
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allocate and deallocate them.
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* Some people use AsciiDoctor, instead of AsciiDoc, to format our
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documentation set; the documentation has been adjusted to be usable
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by both, as AsciiDoctor is pickier than AsciiDoc about its input
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mark-up.
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Also contains various documentation updates and code clean-ups.
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Fixes since v2.1
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----------------
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Unless otherwise noted, all the fixes since v2.1 in the maintenance
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track are contained in this release (see the maintenance releases'
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notes for details).
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* "git log --pretty/format=" with an empty format string did not
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mean the more obvious "No output whatsoever" but "Use default
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format", which was counterintuitive.
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* "git -c section.var command" and "git -c section.var= command"
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should pass the configuration value differently (the former should be a
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boolean true, the latter should be an empty string).
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* Applying a patch not generated by Git in a subdirectory used to
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check for whitespace breakage using the attributes of incorrect
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paths. Also whitespace checks were performed even for paths
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excluded via the "git apply --exclude=<path>" mechanism.
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* "git bundle create" with a date-range specification was meant to
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exclude tags outside the range, but it didn't.
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* "git add x" where x used to be a directory and is now a
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symbolic link to a directory misbehaved.
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* The prompt script checked the $GIT_DIR/ref/stash file to see if there
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is a stash, which was a no-no.
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* Pack-protocol documentation had a minor typo.
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* "git checkout -m" did not switch to another branch while carrying
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the local changes forward when a path was deleted from the index.
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* "git daemon" (with NO_IPV6 build configuration) used to incorrectly
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use the hostname even when gethostbyname() reported that the given
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hostname is not found.
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(merge 107efbe rs/daemon-fixes later to maint).
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* With sufficiently long refnames, "git fast-import" could have
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overflowed an on-stack buffer.
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* After "pack-refs --prune" packed refs at the top-level, it failed
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to prune them.
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* Progress output from "git gc --auto" was visible in "git fetch -q".
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* We used to pass -1000 to poll(2), expecting it to also mean "no
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timeout", which should be spelled as -1.
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* "git rebase" documentation was unclear that it is required to
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specify on what <upstream> the rebase is to be done when telling it
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to first check out <branch>.
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(merge 95c6826 so/rebase-doc later to maint).
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* "git push" over HTTP transport had an artificial limit on the number of
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refs that can be pushed, imposed by the command line length.
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(merge 26be19b jk/send-pack-many-refspecs later to maint).
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* When receiving an invalid pack stream that records the same object
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twice, multiple threads got confused due to a race.
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(merge ab791dd jk/index-pack-threading-races later to maint).
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* An attempt to remove the entire tree in the "git fast-import" input
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stream caused it to misbehave.
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(merge 2668d69 mb/fast-import-delete-root later to maint).
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* Reachability check (used in "git prune" and friends) did not add a
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detached HEAD as a starting point to traverse objects still in use.
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(merge c40fdd0 mk/reachable-protect-detached-head later to maint).
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* "git config --add section.var val" when section.var already has an
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empty-string value used to lose the empty-string value.
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(merge c1063be ta/config-add-to-empty-or-true-fix later to maint).
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* "git fsck" failed to report that it found corrupt objects via its
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exit status in some cases.
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(merge 30d1038 jk/fsck-exit-code-fix later to maint).
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* Use of the "--verbose" option used to break "git branch --merged".
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(merge 12994dd jk/maint-branch-verbose-merged later to maint).
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* Some MUAs mangle a line in a message that begins with "From " to
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">From " when writing to a mailbox file, and feeding such an input
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to "git am" used to lose such a line.
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(merge 85de86a jk/mbox-from-line later to maint).
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* "rev-parse --verify --quiet $name" is meant to quietly exit with a
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non-zero status when $name is not a valid object name, but still
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gave error messages in some cases.
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* A handful of C source files have been updated to include
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"git-compat-util.h" as the first thing, to conform better to our
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coding guidelines.
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(merge 1c4b660 da/include-compat-util-first-in-c later to maint).
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* The t7004 test, which tried to run Git with small stack space, has been
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updated to use a bit larger stack to avoid false breakage on some
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platforms.
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(merge b9a1907 sk/tag-contains-wo-recursion later to maint).
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* A few documentation pages had example sections marked up not quite
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correctly, which passed AsciiDoc but failed with AsciiDoctor.
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(merge c30c43c bc/asciidoc-pretty-formats-fix later to maint).
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(merge f8a48af bc/asciidoc later to maint).
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* "gitweb" used deprecated CGI::startfrom, which was removed from
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CGI.pm as of 4.04; use CGI::start_from instead.
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(merge 4750f4b rm/gitweb-start-form later to maint).
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* Newer versions of 'meld' break the auto-detection we use to see if
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they are new enough to support the `--output` option.
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(merge b12d045 da/mergetool-meld later to maint).
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* "git pack-objects" forgot to disable the codepath to generate the
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object reachability bitmap when it needs to split the resulting
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pack.
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(merge 2113471 jk/pack-objects-no-bitmap-when-splitting later to maint).
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* The code to use cache-tree trusted the on-disk data too much and
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fell into an infinite loop upon seeing an incorrectly recorded
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index file.
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(merge 729dbbd jk/cache-tree-protect-from-broken-libgit2 later to maint).
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* "git fetch" into a repository where branch B was deleted earlier,
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back when it had reflog enabled, and then branch B/C is fetched
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into it without reflog enabled, which is arguably an unlikely
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corner case, unnecessarily failed.
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(merge aae828b jk/fetch-reflog-df-conflict later to maint).
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* "git log --first-parent -L..." used to crash.
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(merge a8787c5 tm/line-log-first-parent later to maint).
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