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Git v1.8.4 Release Notes
========================
Updates since v1.8.3
--------------------
Foreign interfaces, subsystems and ports.
* Git-gui has been updated to its 0.18.0 version.
* MediaWiki remote helper (in contrib/) has been updated to use the
credential helper interface from Git.pm.
* Update build for Cygwin 1.[57]. Torsten Bögershausen reports that
this is fine with Cygwin 1.7 ($gmane/225824) so let's try moving it
ahead.
* The credential helper to talk to keychain on OS X (in contrib/) has
been updated to kick in not just when talking http/https but also
imap(s) and smtp.
* Remote transport helper has been updated to report errors and
maintain ref hierarchy used to keep track of its own state better.
* With "export" remote-helper protocol, (1) a push that tries to
update a remote ref whose name is different from the pushing side
does not work yet, and (2) the helper may not know how to do
--dry-run; these problematic cases are disabled for now.
* git-remote-hg/bzr (in contrib/) updates.
* git-remote-mw (in contrib/) hints users to check the certificate,
when https:// connection failed.
UI, Workflows & Features
* "git rm" gives a single message followed by list of paths to report
multiple paths that cannot be removed.
* "git rebase" can be told with ":/look for this string" syntax commits
to replay the changes onto and where the work to be replayed begins.
* Many tutorials teach users to set "color.ui" to "auto" as the first
thing after you set "user.name/email" to introduce yourselves to
Git. Now the variable defaults to "auto".
### * "git status" learned status.branch and status.short configuration
### variables to use --branch and --short options by default (override
### with --no-branch and --no-short options from the command line).
* "git cmd <name>", when <name> happens to be a 40-hex string,
directly uses the 40-hex string as an object name, even if a ref
"refs/<some hierarchy>/<name>" exists. This disambiguation order
is unlikely to change, but we should warn about the ambiguity just
like we warn when more than one refs/ hierachies share the same
name.
* "git rebase" learned "--[no-]autostash" option to save local
changes instead of refusing to run (to which people's normal
response was to stash them and re-run). This introduced a corner
case breakage to "git am --abort" but it has been fixed.
* Instead of typing four capital letters "HEAD", you can say "@" now,
e.g. "git log @".
* "check-ignore" (new feature since 1.8.2) has been updated to work
more like "check-attr" over bidi-pipes.
* "git describe" learned "--first-parent" option to limit its closest
tagged commit search to the first-parent chain.
* "git merge foo" that might have meant "git merge origin/foo" is
diagnosed with a more informative error message.
* "git log -L<line>,<range>:<filename>" has been added. This may
still have leaks and rough edges, though.
* We used the approxidate() parser for "--expire=<timestamp>" options
of various commands, but it is better to treat --expire=all and
--expire=now a bit more specially than using the current timestamp.
"git gc" and "git reflog" have been updated with a new parsing
function for expiry dates.
* Updates to completion (both bash and zsh) helpers.
* The behaviour of the "--chain-reply-to" option of "git send-email"
have changed at 1.7.0, and we added a warning/advice message to
help users adjust to the new behaviour back then, but we kept it
around for too long. The message has finally been removed.
* "git fetch origin master" unlike "git fetch origin" or "git fetch"
did not update "refs/remotes/origin/master"; this was an early
design decision to keep the update of remote tracking branches
predictable, but in practice it turns out that people find it more
convenient to opportunistically update them whenever we have a
chance, and we have been updating them when we run "git push" which
already breaks the original "predictability" anyway.
* The configuration variable core.checkstat was advertised in the
documentation but the code expected core.statinfo instead.
For now, we accept both core.checkstat and core.statinfo, but the
latter will be removed in the longer term.
Performance, Internal Implementation, etc.
* Uses of the platform fnmatch(3) function (many places in the code,
matching pathspec, .gitignore and .gitattributes to name a few)
have been replaced with wildmatch, allowing "foo/**/bar" that would
match foo/bar, foo/a/bar, foo/a/b/bar, etc.
* Memory ownership and lifetime rules for what for-each-ref feeds to
its callbacks have been clarified (in short, "you do not own it, so
make a copy if you want to keep it").
* The revision traversal logic to improve culling of irrelevant
parents while traversing a mergy history has been updated.
* Some leaks in unpack-trees (used in merge, cherry-pick and other
codepaths) have been plugged.
* The codepath to read from marks files in fast-import/export did not
have to accept anything but 40-hex representation of the object
name. Further, fast-export did not need full in-core object
representation to have parsed wen reading from them. These
codepaths have been optimized by taking advantage of these access
patterns.
* Object lookup logic, when the object hashtable starts to become
crowded, has been optimized.
* When TEST_OUTPUT_DIRECTORY setting is used, it was handled somewhat
inconsistently between the test framework and t/Makefile, and logic
to summarize the results looked at a wrong place.
* "git clone" uses a lighter-weight implementation when making sure
that the history behind refs are complete.
* Many warnings from sparse source checker in compat/ area has been
squelched.
* The code to reading and updating packed-refs file has been updated,
correcting corner case bugs.
Also contains various documentation updates and code clean-ups.
Fixes since v1.8.3
------------------
Unless otherwise noted, all the fixes since v1.8.3 in the maintenance
track are contained in this release (see release notes to them for
details).
* "cherry-pick" had a small leak in an error codepath.
(merge 706728a fc/sequencer-plug-leak later to maint).
* Logic used by git-send-email to suppress cc mishandled names like
"A U. Thor" <author@example.xz>, where the human readable part
needs to be quoted (the user input may not have the double quotes
around the name, and comparison was done between quoted and
unquoted strings).
(merge 1495266 mt/send-email-cc-match-fix later to maint).
* Call to discard_cache/discard_index (used when we use different
contents of the index in-core, in many operations like commit,
apply, and merge) used to leak memory that held the array of index
entries, which has been plugged.
(merge a0fc4db rs/discard-index-discard-array later to maint).
* "gitweb" forgot to clear a global variable $search_regexp upon each
request, mistakenly carrying over the previous search to a new one
when used as a persistent CGI.
(merge ca7a5dc cm/gitweb-project-list-persistent-cgi-fix later to maint).
* The wildmatch engine did not honor WM_CASEFOLD option correctly.
(merge b79c0c3 ar/wildmatch-foldcase later to maint).
* "git log -c --follow $path" segfaulted upon hitting the commit that
renamed the $path being followed.
(merge 46ec510 cb/log-follow-with-combined later to maint).
* When a reflog notation is used for implicit "current branch", we
did not say which branch and worse said "branch ''".
(merge 305ebea rr/die-on-missing-upstream later to maint).
* "difftool --dir-diff" did not copy back changes made by the
end-user in the diff tool backend to the working tree in some
cases.
(merge 32eaf1d ks/difftool-dir-diff-copy-fix later to maint).
* "git push $there HEAD:branch" did not resolve HEAD early enough, so
it was easy to flip it around while push is still going on and push
out a branch that the user did not originally intended when the
command was started.
(merge 0f075b2 rr/push-head later to maint).
* The bash prompt code (in contrib/) displayed the name of the branch
being rebased when "rebase -i/-m/-p" modes are in use, but not the
plain vanilla "rebase".
(merge 1306321 fc/show-branch-in-rebase-am later to maint).
* Handling of negative exclude pattern for directories "!dir" was
broken in the update to v1.8.3.
(merge c3c327d kb/status-ignored-optim-2 later to maint).
* zsh prompt script that borrowed from bash prompt script did not
work due to slight differences in array variable notation between
these two shells.
(merge d0583da tg/maint-zsh-svn-remote-prompt later to maint).
* An entry for "file://" scheme in the enumeration of URL types Git
can take in the HTML documentation was made into a clickable link
by mistake.
(merge 4c32e36 nd/urls-doc-no-file-hyperlink-fix later to maint).
* "git push --[no-]verify" was not documented.
(merge 90d32d1 tr/push-no-verify-doc later to maint).
* Stop installing the git-remote-testpy script that is only used for
testing.
(merge 416fda6 fc/makefile later to maint).
* "git commit --allow-empty-message -m ''" should not start an
editor.
(merge 2520677 rs/commit-m-no-edit later to maint).
* "git merge @{-1}~22" was rewritten to "git merge frotz@{1}~22"
incorrectly when your previous branch was "frotz" (it should be
rewritten to "git merge frotz~22" instead).
(merge 84cf246 jc/strbuf-branchname-fix later to maint).
* "git diff -c -p" was not showing a deleted line from a hunk when
another hunk immediately begins where the earlier one ends.
(merge aac3857 mk/combine-diff-context-horizon-fix later to maint).
* "git log --ancestry-path A...B" did not work as expected, as it did
not pay attention to the fact that the merge base between A and B
was the bottom of the range being specified.
(merge a765499 kb/ancestry-path-threedots later to maint).
* Mac OS X does not like to write(2) more than INT_MAX number of
bytes; work it around by chopping write(2) into smaller pieces.
(merge 6c642a8 fc/macos-x-clipped-write later to maint).
* Newer MacOS X encourages the programs to compile and link with
their CommonCrypto, not with OpenSSL.
(merge be4c828 da/darwin later to maint).
* "git clone foo/bar:baz" cannot be a request to clone from a remote
over git-over-ssh specified in the scp style. This case is now
detected and clones from a local repository at "foo/bar:baz".
(merge 6000334 nd/clone-local-with-colon later to maint).
* When $HOME is misconfigured to point at an unreadable directory, we
used to complain and die. Loosen the check.
(merge 4698c8f jn/config-ignore-inaccessible later to maint).
* "git subtree" (in contrib/) had one codepath with loose error
checks to lose data at the remote side.
(merge 3212d56 jk/subtree-do-not-push-if-split-fails later to maint).
* "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.
(merge 71d5f93 mh/fetch-into-shallow later to maint).
* "git checkout foo" DWIMs the intended "upstream" and turns it into
"git checkout -t -b foo remotes/origin/foo". This codepath has been
updated to correctly take existing remote definitions into account.
(merge 229177a jh/checkout-auto-tracking later to maint).
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