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Git 2.9 Release Notes
=====================
Backward compatibility note
---------------------------
The end-user facing Porcelain level commands in the "git diff" and
"git log" by default enables the rename detection; you can still use
"diff.renames" configuration variable to disable this.
Updates since v2.8
------------------
UI, Workflows & Features
* The end-user facing Porcelain level commands like "diff" and "log"
now enables the rename detection by default.
* The credential.helper configuration variable is cumulative and
there is no good way to override it from the command line. As
a special case, giving an empty string as its value now serves
as the signal to clear the values specified in various files.
* A new "interactive.diffFilter" configuration can be used to
customize the diff shown in "git add -i" session.
* "git p4" now allows P4 author names to be mapped to Git author
names.
* "git rebase -x" can be used without passing "-i" option.
* "git -c credential.<var>=<value> submodule" can now be used to
propagate configuration variables related to credential helper
down to the submodules.
* "git tag" can create an annotated tag without explicitly given an
"-a" (or "-s") option (i.e. when a tag message is given). A new
configuration variable, tag.forceSignAnnotated, can be used to tell
the command to create signed tag in such a situation.
Performance, Internal Implementation, Development Support etc.
* The embedded args argv-array in the child process is used to build
the command line to run pack-objects instead of using a separate
array of strings.
(merge 65a3629 mp/upload-pack-use-embedded-args later to maint).
* A test for tags has been restructured so that more parts of it can
easily be run on a platform without a working GnuPG.
* The startup_info data, which records if we are working inside a
repository (among other things), are now uniformly available to Git
subcommand implementations, and Git avoids attempting to touch
references when we are not in a repository.
(merge 11e6b3f jk/startup-info later to maint).
* The command line argument parser for "receive-pack" has been
rewritten to use parse-options.
* A major part of "git submodule update" has been ported to C to take
advantage of the recently added framework to run download tasks in
parallel.
* Rename bunch of tests on "git clone" for better organization.
(merge 8fbb03a sb/clone-t57-t56 later to maint).
* The tests that involve running httpd leaked the system-wide
configuration in /etc/gitconfig to the tested environment.
(merge 1fad503 jk/test-httpd-config-nosystem later to maint).
Also contains various documentation updates and code clean-ups.
Fixes since v2.8
----------------
Unless otherwise noted, all the fixes since v2.8 in the maintenance
track are contained in this release (see the maintenance releases'
notes for details).
* "git config --get-urlmatch", unlike other variants of the "git
config --get" family, did not signal error with its exit status
when there was no matching configuration.
(merge 24990b2 jk/config-get-urlmatch later to maint).
* The "--local-env-vars" and "--resolve-git-dir" options of "git
rev-parse" failed to work outside a repository when the command's
option parsing was rewritten in 1.8.5 era.
(merge fc7d47f jk/rev-parse-local-env-vars later to maint).
* "git index-pack --keep[=<msg>] pack-$name.pack" simply did not work.
(merge 0e94242 jc/maint-index-pack-keep later to maint).
* Fetching of history by naming a commit object name directly didn't
work across remote-curl transport.
(merge 754ecb1 gf/fetch-pack-direct-object-fetch later to maint).
* A small memory leak in an error codepath has been plugged in xdiff
code.
(merge 87f1625 rj/xdiff-prepare-plug-leak-on-error-codepath later to maint).
* strbuf_getwholeline() did not NUL-terminate the buffer on certain
corner cases in its error codepath.
(merge b709043 jk/getwholeline-getdelim-empty later to maint).
* "git mergetool" did not work well with conflicts that both sides
deleted.
(merge a298604 da/mergetool-delete-delete-conflict later to maint).
* "git send-email" had trouble parsing alias file in mailrc format
when lines in it had trailing whitespaces on them.
(merge a277d1e jk/send-email-rtrim-mailrc-alias later to maint).
* When "git merge --squash" stopped due to conflict, the concluding
"git commit" failed to read in the SQUASH_MSG that shows the log
messages from all the squashed commits.
(merge b64c1e0 ss/commit-squash-msg later to maint).
* "git merge FETCH_HEAD" dereferenced NULL pointer when merging
nothing into an unborn history (which is arguably unusual usage,
which perhaps was the reason why nobody noticed it).
(merge b84e65d jv/merge-nothing-into-void later to maint).
* Other minor clean-ups and documentation updates
(merge aed7480 mm/lockfile-error-message later to maint).
(merge bfee614 jc/index-pack later to maint).
(merge f870899 ss/exc-flag-is-a-collection-of-bits later to maint).
(merge dde7891 pb/t7502-drop-dup later to maint).
(merge 3bd1b51 cc/doc-recommend-performance-trace-to-file later to maint).
(merge 7d5e9c9 jk/credential-cache-comment-exit later to maint).
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