486 lines
21 KiB
Text
486 lines
21 KiB
Text
Git v1.8.4 Release Notes
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========================
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Backward compatibility notes (for Git 2.0)
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------------------------------------------
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When "git push [$there]" does not say what to push, we have used the
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traditional "matching" semantics so far (all your branches were sent
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to the remote as long as there already are branches of the same name
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over there). In Git 2.0, the default will change to the "simple"
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semantics that pushes:
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- only the current branch to the branch with the same name, and only
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when the current branch is set to integrate with that remote
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branch, if you are pushing to the same remote as you fetch from; or
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- only the current branch to the branch with the same name, if you
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are pushing to a remote that is not where you usually fetch from.
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Use the user preference configuration variable "push.default" to
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change this. If you are an old-timer who is used to the "matching"
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semantics, you can set the variable to "matching" to keep the
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traditional behaviour. If you want to live in the future early, you
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can set it to "simple" today without waiting for Git 2.0.
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When "git add -u" (and "git add -A") is run inside a subdirectory and
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does not specify which paths to add on the command line, it
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will operate on the entire tree in Git 2.0 for consistency
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with "git commit -a" and other commands. There will be no
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mechanism to make plain "git add -u" behave like "git add -u .".
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Current users of "git add -u" (without a pathspec) should start
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training their fingers to explicitly say "git add -u ."
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before Git 2.0 comes. A warning is issued when these commands are
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run without a pathspec and when you have local changes outside the
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current directory, because the behaviour in Git 2.0 will be different
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from today's version in such a situation.
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In Git 2.0, "git add <path>" will behave as "git add -A <path>", so
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that "git add dir/" will notice paths you removed from the directory
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and record the removal. Versions before Git 2.0, including this
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release, will keep ignoring removals, but the users who rely on this
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behaviour are encouraged to start using "git add --ignore-removal <path>"
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now before 2.0 is released.
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Updates since v1.8.3
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--------------------
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Foreign interfaces, subsystems and ports.
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* Cygwin port has been updated for more recent Cygwin 1.7.
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* "git rebase -i" now honors --strategy and -X options.
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* Git-gui has been updated to its 0.18.0 version.
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* MediaWiki remote helper (in contrib/) has been updated to use the
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credential helper interface from Git.pm.
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* Update build for Cygwin 1.[57]. Torsten Bögershausen reports that
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this is fine with Cygwin 1.7 ($gmane/225824) so let's try moving it
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ahead.
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* The credential helper to talk to keychain on OS X (in contrib/) has
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been updated to kick in not just when talking http/https but also
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imap(s) and smtp.
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* Remote transport helper has been updated to report errors and
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maintain ref hierarchy used to keep track of its own state better.
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* With "export" remote-helper protocol, (1) a push that tries to
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update a remote ref whose name is different from the pushing side
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does not work yet, and (2) the helper may not know how to do
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--dry-run; these problematic cases are disabled for now.
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* git-remote-hg/bzr (in contrib/) updates.
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* git-remote-mw (in contrib/) hints users to check the certificate,
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when https:// connection failed.
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* git-remote-mw (in contrib/) adds a command to allow previewing the
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contents locally before pushing it out, when working with a
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MediaWiki remote.
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UI, Workflows & Features
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* Sample "post-receive-email" hook script got an enhanced replacement
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"multimail" (in contrib/).
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* Also in contrib/ is a new "contacts" script that runs "git blame"
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to find out the people who may be interested in a set of changes.
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* "git clean" command learned an interactive mode.
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* The "--head" option to "git show-ref" was only to add "HEAD" to the
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list of candidate refs to be filtered by the usual rules
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(e.g. "--heads" that only show refs under refs/heads). The meaning
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of the option has been changed to always show "HEAD" regardless of
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what filtering will be applied to any other ref.
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This is a backward incompatible change and might cause breakages to
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people's existing scripts.
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* "git show -s" was less discoverable than it should have been. It
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now has a natural synonym "git show --no-patch".
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* "git check-mailmap" is a new command that lets you map usernames
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and e-mail addresses through the mailmap mechanism, just like many
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built-in commands do.
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* "git name-rev" learned to name an annotated tag object back to its
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tagname; "git name-rev $(git rev-parse v1.0.0)" gives "tags/v1.0.0",
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for example.
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* "git cat-file --batch-check=<format>" is added, primarily to allow
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on-disk footprint of objects in packfiles (often they are a lot
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smaller than their true size, when expressed as deltas) to be
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reported.
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* "git rebase [-i]" used to leave just "rebase" as its reflog messages
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for some operations. They have been reworded to be more informative.
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* In addition to the choice from "rebase, merge, or checkout-detach",
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"submodule update" can allow a custom command to be used in to
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update the working tree of submodules via the "submodule.*.update"
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configuration variable.
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* "git submodule update" can optionally clone the submodule
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repositories shallowly.
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* "git format-patch" learned "--from[=whom]" option, which sets the
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"From: " header to the specified person (or the person who runs the
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command, if "=whom" part is missing) and move the original author
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information to an in-body From: header as necessary.
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* The configuration variable "merge.ff" was cleary a tri-state to
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choose one from "favor fast-forward when possible", "always create
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a merge even when the history could fast-forward" and "do not
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create any merge, only update when the history fast-forwards", but
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the command line parser did not implement the usual convention of
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"last one wins, and command line overrides the configuration"
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correctly.
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* "gitweb" learned to optionally place extra links that point at the
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levels higher than the Gitweb pages themselves in the breadcrumbs,
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so that it can be used as part of a larger installation.
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* "git log --format=" now honors i18n.logoutputencoding configuration
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variable.
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* The "push.default=simple" mode of "git push" has been updated to
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behave like "current" without requiring a remote tracking
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information, when you push to a remote that is different from where
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you fetch from (i.e. a triangular workflow).
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* Having multiple "fixup!" on a line in the rebase instruction sheet
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did not work very well with "git rebase -i --autosquash".
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* "git log" learned the "--author-date-order" option, with which the
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output is topologically sorted and commits in parallel histories
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are shown intermixed together based on the author timestamp.
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* Various subcommands of "git submodule" refused to run from anywhere
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other than the top of the working tree of the superproject, but
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they have been taught to let you run from a subdirectory.
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* "git diff" learned a mode that ignores hunks whose change consists
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only of additions and removals of blank lines, which is the same as
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"diff -B" (ignore blank lines) of GNU diff.
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* "git rm" gives a single message followed by list of paths to report
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multiple paths that cannot be removed.
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* "git rebase" can be told with ":/look for this string" syntax commits
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to replay the changes onto and where the work to be replayed begins.
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* Many tutorials teach users to set "color.ui" to "auto" as the first
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thing after you set "user.name/email" to introduce yourselves to
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Git. Now the variable defaults to "auto".
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* On Cygwin, "cygstart" is now recognised as a possible way to start
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a web browser (used in "help -w" and "instaweb" among others).
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* "git status" learned status.branch and status.short configuration
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variables to use --branch and --short options by default (override
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with --no-branch and --no-short options from the command line).
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* "git cmd <name>", when <name> happens to be a 40-hex string,
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directly uses the 40-hex string as an object name, even if a ref
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"refs/<some hierarchy>/<name>" exists. This disambiguation order
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is unlikely to change, but we should warn about the ambiguity just
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like we warn when more than one refs/ hierarchies share the same
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name.
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* "git rebase" learned "--[no-]autostash" option to save local
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changes instead of refusing to run (to which people's normal
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response was to stash them and re-run). This introduced a corner
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case breakage to "git am --abort" but it has been fixed.
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* "check-ignore" (new feature since 1.8.2) has been updated to work
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more like "check-attr" over bidi-pipes.
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* "git describe" learned "--first-parent" option to limit its closest
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tagged commit search to the first-parent chain.
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* "git merge foo" that might have meant "git merge origin/foo" is
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diagnosed with a more informative error message.
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* "git log -L<line>,<range>:<filename>" has been added. This may
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still have leaks and rough edges, though.
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* We used the approxidate() parser for "--expire=<timestamp>" options
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of various commands, but it is better to treat --expire=all and
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--expire=now a bit more specially than using the current timestamp.
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"git gc" and "git reflog" have been updated with a new parsing
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function for expiry dates.
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* Updates to completion (both bash and zsh) helpers.
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* The behaviour of the "--chain-reply-to" option of "git send-email"
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have changed at 1.7.0, and we added a warning/advice message to
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help users adjust to the new behaviour back then, but we kept it
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around for too long. The message has finally been removed.
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* "git fetch origin master" unlike "git fetch origin" or "git fetch"
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did not update "refs/remotes/origin/master"; this was an early
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design decision to keep the update of remote tracking branches
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predictable, but in practice it turns out that people find it more
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convenient to opportunistically update them whenever we have a
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chance, and we have been updating them when we run "git push" which
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already breaks the original "predictability" anyway.
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* The configuration variable core.checkstat was advertised in the
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documentation but the code expected core.statinfo instead.
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For now, we accept both core.checkstat and core.statinfo, but the
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latter will be removed in the longer term.
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Performance, Internal Implementation, etc.
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* On Cygwin, we used to use our own lstat(2) emulation that is
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allegedly faster than the platform one in codepaths where some of
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the information it returns did not matter, but it started to bite
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us in a few codepaths where the trick it uses to cheat does show
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breakages. This emulation has been removed and we use the native
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lstat(2) emulation supplied by Cygwin now.
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* The function attributes extensions are used to catch mistakes in
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use of our own variadic functions that use NULL sentinel at the end
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(i.e. like execl(3)) and format strings (i.e. like printf(3)).
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* The code to allow configuration data to be read from in-tree blob
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objects is in. This may help working in a bare repository and
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submodule updates.
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* Fetching between repositories with many refs employed O(n^2)
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algorithm to match up the common objects, which has been corrected.
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* The original way to specify remote repository using .git/branches/
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used to have a nifty feature. The code to support the feature was
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still in a function but the caller was changed not to call it 5
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years ago, breaking that feature and leaving the supporting code
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unreachable. The dead code has been removed.
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* "git pack-refs" that races with new ref creation or deletion have
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been susceptible to lossage of refs under right conditions, which
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has been tightened up.
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* We read loose and packed references in two steps, but after
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deciding to read a loose ref but before actually opening it to read
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it, another process racing with us can unlink it, which would cause
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us to barf. The codepath has been updated to retry when such a
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race is detected, instead of outright failing.
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* Uses of the platform fnmatch(3) function (many places in the code,
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matching pathspec, .gitignore and .gitattributes to name a few)
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have been replaced with wildmatch, allowing "foo/**/bar" that would
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match foo/bar, foo/a/bar, foo/a/b/bar, etc.
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* Memory ownership and lifetime rules for what for-each-ref feeds to
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its callbacks have been clarified (in short, "you do not own it, so
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make a copy if you want to keep it").
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* The revision traversal logic to improve culling of irrelevant
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parents while traversing a mergy history has been updated.
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* Some leaks in unpack-trees (used in merge, cherry-pick and other
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codepaths) have been plugged.
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* The codepath to read from marks files in fast-import/export did not
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have to accept anything but 40-hex representation of the object
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name. Further, fast-export did not need full in-core object
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representation to have parsed wen reading from them. These
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codepaths have been optimized by taking advantage of these access
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patterns.
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* Object lookup logic, when the object hashtable starts to become
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crowded, has been optimized.
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* When TEST_OUTPUT_DIRECTORY setting is used, it was handled somewhat
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inconsistently between the test framework and t/Makefile, and logic
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to summarize the results looked at a wrong place.
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* "git clone" uses a lighter-weight implementation when making sure
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that the history behind refs are complete.
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* Many warnings from sparse source checker in compat/ area has been
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squelched.
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* The code to reading and updating packed-refs file has been updated,
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correcting corner case bugs.
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Also contains various documentation updates and code clean-ups.
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Fixes since v1.8.3
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------------------
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Unless otherwise noted, all the fixes since v1.8.3 in the maintenance
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track are contained in this release (see release notes to them for
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details).
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* Newer Net::SMTP::SSL module does not want the user programs to use
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the default behaviour to let server certificate go without
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verification, so by default enable the verification with a
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mechanism to turn it off if needed.
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(merge 35035bb rr/send-email-ssl-verify later to maint).
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* When "git" is spawned in such a way that any of the low 3 file
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descriptors is closed, our first open() may yield file descriptor 2,
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and writing error message to it would screw things up in a big way.
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(merge a11c396 tr/protect-low-3-fds later to maint).
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* The mailmap mechanism unnecessarily downcased the e-mail addresses
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in the output, and also ignored the human name when it is a single
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character name.
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(merge bd23794 jc/mailmap-case-insensitivity later to maint).
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* In two places we did not check return value (expected to be a file
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descriptor) correctly.
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(merge a77f106 tr/fd-gotcha-fixes later to maint).
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* Logic to auto-detect character encodings in the commit log message
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did not reject overlong and invalid UTF-8 characters.
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(merge 81050ac bc/commit-invalid-utf8 later to maint).
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* Pass port number as a separate argument when "send-email" initializes
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Net::SMTP, instead of as a part of the hostname, i.e. host:port.
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This allows GSSAPI codepath to match with the hostname given.
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(merge 1a741bf bc/send-email-use-port-as-separate-param later to maint).
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* "git diff" refused to even show difference when core.safecrlf is
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set to true (i.e. error out) and there are offending lines in the
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working tree files.
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(merge 5430bb2 jc/maint-diff-core-safecrlf later to maint).
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* A test that should have failed but didn't revealed a bug that needs
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to be corrected.
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(merge 94d75d1 jc/t1512-fix later to maint).
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* An overlong path to a .git directory may have overflown the
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temporary path buffer used to create a name for lockfiles.
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(merge 2fbd4f9 mh/maint-lockfile-overflow later to maint).
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* Invocations of "git checkout" used internally by "git rebase" were
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counted as "checkout", and affected later "git checkout -" to the
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the user to an unexpected place.
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(merge 3bed291 rr/rebase-checkout-reflog later to maint).
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* The configuration variable column.ui was poorly documented.
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(merge 5e62cc1 rr/column-doc later to maint).
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* "git name-rev --refs=tags/v*" were forbidden, which was a bit
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inconvenient (you had to give a pattern to match refs fully, like
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--refs=refs/tags/v*).
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(merge 98c5c4a nk/name-rev-abbreviated-refs later to maint).
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* "git apply" parsed patches that add new files, generated by
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programs other than Git, incorrectly. This is an old breakage in
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v1.7.11 and will need to be merged down to the maintenance tracks.
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* Older cURL wanted piece of memory we call it with to be stable, but
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we updated the auth material after handing it to a call.
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* "git pull" into nothing trashed "local changes" that were in the
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index, and this avoids it.
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* Many "git submodule" operations do not work on a submodule at a
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path whose name is not in ASCII.
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* "cherry-pick" had a small leak in an error codepath.
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* Logic used by git-send-email to suppress cc mishandled names like
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"A U. Thor" <author@example.xz>, where the human readable part
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needs to be quoted (the user input may not have the double quotes
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around the name, and comparison was done between quoted and
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unquoted strings). It also mishandled names that need RFC2047
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quoting.
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* Call to discard_cache/discard_index (used when we use different
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contents of the index in-core, in many operations like commit,
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apply, and merge) used to leak memory that held the array of index
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entries, which has been plugged.
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(merge a0fc4db rs/discard-index-discard-array later to maint).
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* "gitweb" forgot to clear a global variable $search_regexp upon each
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request, mistakenly carrying over the previous search to a new one
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when used as a persistent CGI.
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* The wildmatch engine did not honor WM_CASEFOLD option correctly.
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* "git log -c --follow $path" segfaulted upon hitting the commit that
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renamed the $path being followed.
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* When a reflog notation is used for implicit "current branch", we
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did not say which branch and worse said "branch ''".
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* "difftool --dir-diff" did not copy back changes made by the
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end-user in the diff tool backend to the working tree in some
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cases.
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* "git push $there HEAD:branch" did not resolve HEAD early enough, so
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it was easy to flip it around while push is still going on and push
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out a branch that the user did not originally intended when the
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command was started.
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* The bash prompt code (in contrib/) displayed the name of the branch
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being rebased when "rebase -i/-m/-p" modes are in use, but not the
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plain vanilla "rebase".
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* Handling of negative exclude pattern for directories "!dir" was
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broken in the update to v1.8.3.
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* zsh prompt script that borrowed from bash prompt script did not
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work due to slight differences in array variable notation between
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these two shells.
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* An entry for "file://" scheme in the enumeration of URL types Git
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can take in the HTML documentation was made into a clickable link
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by mistake.
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* "git push --[no-]verify" was not documented.
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* Stop installing the git-remote-testpy script that is only used for
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testing.
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* "git commit --allow-empty-message -m ''" should not start an
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editor.
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* "git merge @{-1}~22" was rewritten to "git merge frotz@{1}~22"
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incorrectly when your previous branch was "frotz" (it should be
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rewritten to "git merge frotz~22" instead).
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* "git diff -c -p" was not showing a deleted line from a hunk when
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another hunk immediately begins where the earlier one ends.
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* "git log --ancestry-path A...B" did not work as expected, as it did
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not pay attention to the fact that the merge base between A and B
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was the bottom of the range being specified.
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|
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* Mac OS X does not like to write(2) more than INT_MAX number of
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bytes; work it around by chopping write(2) into smaller pieces.
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|
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* Newer MacOS X encourages the programs to compile and link with
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their CommonCrypto, not with OpenSSL.
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|
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* "git clone foo/bar:baz" cannot be a request to clone from a remote
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|
over git-over-ssh specified in the scp style. This case is now
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|
detected and clones from a local repository at "foo/bar:baz".
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|
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|
* When $HOME is misconfigured to point at an unreadable directory, we
|
|
used to complain and die. Loosen the check.
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|
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|
* "git subtree" (in contrib/) had one codepath with loose error
|
|
checks to lose data at the remote side.
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|
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|
* "git fetch" into a shallow repository from a repository that does
|
|
not know about the shallow boundary commits (e.g. a different fork
|
|
from the repository the current shallow repository was cloned from)
|
|
did not work correctly.
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|
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|
* "git checkout foo" DWIMs the intended "upstream" and turns it into
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|
"git checkout -t -b foo remotes/origin/foo". This codepath has been
|
|
updated to correctly take existing remote definitions into account.
|