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345 lines
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345 lines
15 KiB
Plaintext
Git 2.5 Release Notes
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=====================
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Updates since v2.4
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------------------
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Ports
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UI, Workflows & Features
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* "git p4" now detects the filetype (e.g. binary) correctly even when
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the files are opened exclusively.
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* git p4 attempts to better handle branches in Perforce.
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* "git p4" learned "--changes-block-size <n>" to read the changes in
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chunks from Perforce, instead of making one call to "p4 changes"
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that may trigger "too many rows scanned" error from Perforce.
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* "git show-branch --topics HEAD" (with no other arguments) did not
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do anything interesting. Instead, contrast the given revision
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against all the local branches by default.
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* A replacement for contrib/workdir/git-new-workdir that does not
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rely on symbolic links and make sharing of objects and refs safer
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by making the borrowee and borrowers aware of each other.
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* Tweak the sample "store" backend of the credential helper to honor
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XDG configuration file locations when specified.
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* A heuristic to help the "git <cmd> <revs> <pathspec>" command line
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convention to catch mistyped paths is to make sure all the non-rev
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parameters in the later part of the command line are names of the
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files in the working tree, but that means "git grep $str -- \*.c"
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must always be disambiguated with "--", because nobody sane will
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create a file whose name literally is asterisk-dot-see. Loosen the
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heuristic to declare that with a wildcard string the user likely
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meant to give us a pathspec.
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* "git merge FETCH_HEAD" learned that the previous "git fetch" could
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be to create an Octopus merge, i.e. recording multiple branches
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that are not marked as "not-for-merge"; this allows us to lose an
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old style invocation "git merge <msg> HEAD $commits..." in the
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implementation of "git pull" script; the old style syntax can now
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be deprecated.
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* Help us to find broken test script that splits the body part of the
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test by mistaken use of wrong kind of quotes.
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(merge d93d5d5 jc/test-prereq-validate later to maint).
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* Developer support to automatically detect broken &&-chain in the
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test scripts is now turned on by default.
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(merge 92b269f jk/test-chain-lint later to maint).
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* Filter scripts were run with SIGPIPE disabled on the Git side,
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expecting that they may not read what Git feeds them to filter.
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We however treated a filter that does not read its input fully
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before exiting as an error.
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This changes semantics, but arguably in a good way. If a filter
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can produce its output without consuming its input using whatever
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magic, we now let it do so, instead of diagnosing it as a
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programming error.
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* Instead of dying immediately upon failing to obtain a lock, the
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locking (of refs etc) retries after a short while with backoff.
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* Introduce http.<url>.SSLCipherList configuration variable to tweak
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the list of cipher suite to be used with libcURL when talking with
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https:// sites.
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* "git subtree" script (in contrib/) used "echo -n" to produce
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progress messages in a non-portable way.
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* "git subtree" script (in contrib/) does not have --squash option
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when pushing, but the documentation and help text pretended as if
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it did.
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* The Git subcommand completion (in contrib/) listed credential
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helpers among candidates, which is not something the end user would
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invoke interactively.
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* The index file can be taught with "update-index --untracked-cache"
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to optionally remember already seen untracked files, in order to
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speed up "git status" in a working tree with tons of cruft.
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Performance, Internal Implementation, Development Support etc.
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* "unsigned char [20]" used throughout the code to represent object
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names are being converted into a semi-opaque "struct object_id".
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This effort is expected to interfere with other topics in flight,
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but hopefully will give us one extra level of abstraction in the
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end, when completed.
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* Catch a programmer mistake to feed a pointer not an array to
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ARRAY_SIZE() macro, by using a couple of GCC extensions.
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(merge 89c855e ep/do-not-feed-a-pointer-to-array-size later to maint).
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* Some error messages in "git config" were emitted without calling
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the usual error() facility.
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* When "add--interactive" splits a hunk into two overlapping hunks
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and then let the user choose only one, it sometimes feeds an
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incorrect patch text to "git apply". Add tests to demonstrate
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this.
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I have a slight suspicion that this may be $gmane/87202 coming back
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and biting us (I seem to have said "let's run with this and see
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what happens" back then).
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* More line-ending tests.
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* An earlier rewrite to use strbuf_getwholeline() instead of fgets(3)
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to read packed-refs file revealed that the former is unacceptably
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inefficient.
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* The refs API uses ref_lock struct which had its own "int fd", even
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though the same file descriptor was in the lock struct it contains.
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Clean-up the code to lose this redundant field.
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* Add the "--allow-unknown-type" option to "cat-file" to allow
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inspecting loose objects of an experimental or a broken type.
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* Many long-running operations show progress eye-candy, even when
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they are later backgrounded. Hide the eye-candy when the process
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is sent to the background instead.
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(merge 9a9a41d lm/squelch-bg-progress later to maint).
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* There was a dead code that used to handle "git pull --tags" and
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show special-cased error message, which was made irrelevant when
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the semantics of the option changed back in Git 1.9 days.
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(merge 19d122b pt/pull-tags-error-diag later to maint).
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Also contains various documentation updates and code clean-ups.
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Fixes since v2.4
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----------------
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Unless otherwise noted, all the fixes since v2.4 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 2.4 broke setting verbosity and progress levels on "git clone"
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with native transports.
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(merge 822f0c4 mh/clone-verbosity-fix later to maint).
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* "git add -e" did not allow the user to abort the operation by
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killing the editor.
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(merge cb64800 jk/add-e-kill-editor later to maint).
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* Memory usage of "git index-pack" has been trimmed by tens of
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per-cent.
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(merge c6458e6 nd/slim-index-pack-memory-usage later to maint).
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* "git rev-list --objects $old --not --all" to see if everything that
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is reachable from $old is already connected to the existing refs
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was very inefficient.
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(merge b6e8a3b jk/still-interesting later to maint).
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* "hash-object --literally" introduced in v2.2 was not prepared to
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take a really long object type name.
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(merge 1427a7f jc/hash-object later to maint).
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* "git rebase --quiet" was not quite quiet when there is nothing to
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do.
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(merge 22946a9 jk/rebase-quiet-noop later to maint).
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* The completion for "log --decorate=" parameter value was incorrect.
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(merge af16bda sg/complete-decorate-full-not-long later to maint).
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* "filter-branch" corrupted commit log message that ends with an
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incomplete line on platforms with some "sed" implementations that
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munge such a line. Work it around by avoiding to use "sed".
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(merge df06201 jk/filter-branch-use-of-sed-on-incomplete-line later to maint).
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* "git daemon" fails to build from the source under NO_IPV6
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configuration (regression in 2.4).
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(merge d358f77 jc/daemon-no-ipv6-for-2.4.1 later to maint).
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* Some time ago, "git blame" (incorrectly) lost the convert_to_git()
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call when synthesizing a fake "tip" commit that represents the
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state in the working tree, which broke folks who record the history
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with LF line ending to make their project portable across platforms
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while terminating lines in their working tree files with CRLF for
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their platform.
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(merge 4bf256d tb/blame-resurrect-convert-to-git later to maint).
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* We avoid setting core.worktree when the repository location is the
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".git" directory directly at the top level of the working tree, but
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the code misdetected the case in which the working tree is at the
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root level of the filesystem (which arguably is a silly thing to
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do, but still valid).
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(merge 84ccad8 jk/init-core-worktree-at-root later to maint).
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* "git commit --date=now" or anything that relies on approxidate lost
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the daylight-saving-time offset.
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(merge f6e6362 jc/epochtime-wo-tz later to maint).
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* Access to objects in repositories that borrow from another one on a
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slow NFS server unnecessarily got more expensive due to recent code
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becoming more cautious in a naive way not to lose objects to pruning.
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(merge ee1c6c3 jk/prune-mtime later to maint).
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* The codepaths that read .gitignore and .gitattributes files have been
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taught that these files encoded in UTF-8 may have UTF-8 BOM marker at
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the beginning; this makes it in line with what we do for configuration
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files already.
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(merge 27547e5 cn/bom-in-gitignore later to maint).
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* a few helper scripts in the test suite did not report errors
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correctly.
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(merge de248e9 ep/fix-test-lib-functions-report later to maint).
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* The default $HOME/.gitconfig file created upon "git config --global"
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that edits it had incorrectly spelled user.name and user.email
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entries in it.
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(merge 7e11052 oh/fix-config-default-user-name-section later to maint).
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* "git cat-file bl $blob" failed to barf even though there is no
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object type that is "bl".
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(merge b7994af jk/type-from-string-gently later to maint).
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* The usual "git diff" when seeing a file turning into a directory
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showed a patchset to remove the file and create all files in the
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directory, but "git diff --no-index" simply refused to work. Also,
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when asked to compare a file and a directory, imitate POSIX "diff"
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and compare the file with the file with the same name in the
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directory, instead of refusing to run.
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(merge 0615173 jc/diff-no-index-d-f later to maint).
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* "git rebase -i" moved the "current" command from "todo" to "done" a
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bit too prematurely, losing a step when a "pick" did not even start.
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(merge 8cbc57c ph/rebase-i-redo later to maint).
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* The connection initiation code for "ssh" transport tried to absorb
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differences between the stock "ssh" and Putty-supplied "plink" and
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its derivatives, but the logic to tell that we are using "plink"
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variants were too loose and falsely triggered when "plink" appeared
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anywhere in the path (e.g. "/home/me/bin/uplink/ssh").
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(merge baaf233 bc/connect-plink later to maint).
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* "git stash pop/apply" forgot to make sure that not just the working
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tree is clean but also the index is clean. The latter is important
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as a stash application can conflict and the index will be used for
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conflict resolution.
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(merge ed178ef jk/stash-require-clean-index later to maint).
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* We have prepended $GIT_EXEC_PATH and the path "git" is installed in
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(typically "/usr/bin") to $PATH when invoking subprograms and hooks
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for almost eternity, but the original use case the latter tried to
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support was semi-bogus (i.e. install git to /opt/foo/git and run it
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without having /opt/foo on $PATH), and more importantly it has
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become less and less relevant as Git grew more mainstream (i.e. the
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users would _want_ to have it on their $PATH). Stop prepending the
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path in which "git" is installed to users' $PATH, as that would
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interfere the command search order people depend on (e.g. they may
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not like versions of programs that are unrelated to Git in /usr/bin
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and want to override them by having different ones in /usr/local/bin
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and have the latter directory earlier in their $PATH).
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(merge a0b4507 jk/git-no-more-argv0-path-munging later to maint).
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* core.excludesfile (defaulting to $XDG_HOME/git/ignore) is supposed
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to be overridden by repository-specific .git/info/exclude file, but
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the order was swapped from the beginning. This belatedly fixes it.
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(merge 099d2d8 jc/gitignore-precedence later to maint).
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* After "git add -N", the path appeared in output of "git diff HEAD"
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and "git diff --cached HEAD", leading "git status" to classify it
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as "Changes to be committed". Such a path, however, is not yet to
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be scheduled to be committed. "git diff" showed the change to the
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path as modification, not as a "new file", in the header of its
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output.
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Treat such paths as "yet to be added to the index but Git already
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know about them"; "git diff HEAD" and "git diff --cached HEAD"
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should not talk about them, and "git diff" should show them as new
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files yet to be added to the index.
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(merge d95d728 nd/diff-i-t-a later to maint).
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* There was a commented-out (instead of being marked to expect
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failure) test that documented a breakage that was fixed since the
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test was written; turn it into a proper test.
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(merge 66d2e04 sb/t1020-cleanup later to maint).
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* The "log --decorate" enhancement in Git 2.4 that shows the commit
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at the tip of the current branch e.g. "HEAD -> master", did not
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work with --decorate=full.
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(merge 429ad20 mg/log-decorate-HEAD later to maint).
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* The ref API did not handle cases where 'refs/heads/xyzzy/frotz' is
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removed at the same time as 'refs/heads/xyzzy' is added (or vice
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versa) very well.
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(merge c628edf mh/ref-directory-file later to maint).
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* Multi-ref transaction support we merged a few releases ago
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unnecessarily kept many file descriptors open, risking to fail with
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resource exhaustion. This is for 2.4.x track.
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(merge 185ce3a mh/write-refs-sooner-2.4 later to maint).
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* "git bundle verify" did not diagnose extra parameters on the
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command line.
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(merge 7886cfa ps/bundle-verify-arg later to maint).
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* Various documentation mark-up fixes to make the output more
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consistent in general and also make AsciiDoctor (an alternative
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formatter) happier.
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(merge d0258b9 jk/asciidoc-markup-fix later to maint).
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(merge ad3967a jk/stripspace-asciidoctor-fix later to maint).
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(merge 975e382 ja/tutorial-asciidoctor-fix later to maint).
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* The code to read pack-bitmap wanted to allocate a few hundred
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pointers to a structure, but by mistake allocated and leaked memory
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enough to hold that many actual structures. Correct the allocation
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size and also have it on stack, as it is small enough.
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(merge 599dc76 rs/plug-leak-in-pack-bitmaps later to maint).
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* The pull.ff configuration was supposed to override the merge.ff
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configuration, but it didn't.
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(merge db9bb28 pt/pull-ff-vs-merge-ff later to maint).
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* "git pull --log" and "git pull --no-log" worked as expected, but
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"git pull --log=20" did not.
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(merge 5061a44 pt/pull-log-n later to maint).
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* "git rerere forget" in a repository without rerere enabled gave a
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cryptic error message; it should be a silent no-op instead.
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(merge 0544574 jk/rerere-forget-check-enabled later to maint).
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* Code cleanups and documentation updates.
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(merge 0269f96 mm/usage-log-l-can-take-regex later to maint).
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(merge 64f2589 nd/t1509-chroot-test later to maint).
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(merge f86a374 sb/test-bitmap-free-at-end later to maint).
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(merge 05bfc7d sb/line-log-plug-pairdiff-leak later to maint).
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(merge 846e5df pt/xdg-config-path later to maint).
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(merge 1154aa4 jc/plug-fmt-merge-msg-leak later to maint).
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(merge 319b678 jk/sha1-file-reduce-useless-warnings later to maint).
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(merge 9a35c14 fg/document-commit-message-stripping later to maint).
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(merge bbf431c ps/doc-packfile-vs-pack-file later to maint).
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(merge 309a9e3 jk/skip-http-tests-under-no-curl later to maint).
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(merge ccd593c dl/branch-error-message later to maint).
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