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Git 2.10 Release Notes
======================
Backward compatibility notes
----------------------------
Updates since v2.9
------------------
UI, Workflows & Features
* "git pull --rebase --verify-signature" learned to warn the user
that "--verify-signature" is a no-op when rebasing.
* An upstream project can make a recommendation to shallowly clone
some submodules in the .gitmodules file it ships.
* "git worktree add" learned that '-' can be used as a short-hand for
"@{-1}", the previous branch.
* Update the funcname definition to support css files.
* The completion script (in contrib/) learned to complete "git
status" options.
* Messages that are generated by auto gc during "git push" on the
receiving end are now passed back to the sending end in such a way
that they are shown with "remote: " prefix to avoid confusing the
users.
* "git add -i/-p" learned to honor diff.compactionHeuristic
experimental knob, so that the user can work on the same hunk split
as "git diff" output.
(merge 46e3d17 jk/add-i-diff-compact-heuristics later to maint).
* "upload-pack" allows a custom "git pack-objects" replacement when
responding to "fetch/clone" via the uploadpack.packObjectsHook.
(merge 20b20a2 jk/upload-pack-hook later to maint).
* Teach format-patch and mailsplit (hence "am") how a line that
happens to begin with "From " in the e-mail message is quoted with
">", so that these lines can be restored to their original shape.
(merge d9925d1 ew/mboxrd-format-am later to maint).
* "git repack" learned the "--keep-unreachable" option, which sends
loose unreachable objects to a pack instead of leaving them loose.
This helps heuristics based on the number of loose objects
(e.g. "gc --auto").
(merge e26a8c4 jk/repack-keep-unreachable later to maint).
* "log --graph --format=" learned that "%>|(N)" specifies the width
relative to the terminal's left edge, not relative to the area to
draw text that is to the right of the ancestry-graph section. It
also now accepts negative N that means the column limit is relative
to the right border.
(merge 066790d nd/graph-width-padded later to maint).
Performance, Internal Implementation, Development Support etc.
* "git fast-import" learned the same performance trick to avoid
creating too small a packfile as "git fetch" and "git push" have,
using *.unpackLimit configuration.
* When "git daemon" is run without --[init-]timeout specified, a
connection from a client that silently goes offline can hang around
for a long time, wasting resources. The socket-level KEEPALIVE has
been enabled to allow the OS to notice such failed connections.
(merge a43b68a ew/daemon-socket-keepalive later to maint).
* "git upload-pack" command has been updated to use the parse-options
API.
* The "git apply" standalone program is being libified; this is the
first step to move many state variables into a structure that can
be explicitly (re)initialized to make the machinery callable more
than once.
* HTTP transport gained an option to produce more detailed debugging
trace.
(merge 73e57aa ep/http-curl-trace later to maint).
* Instead of taking advantage of a struct string_list that is
allocated with all NULs happens to be STRING_LIST_INIT_NODUP kind,
initialize them explicitly as such, to document their behaviour
better.
(merge 2721ce2 jk/string-list-static-init later to maint).
* HTTPd tests learned to show the server error log to help diagnosing
a failing tests.
(merge 44f243d nd/test-lib-httpd-show-error-log-in-verbose later to maint).
* The ownership rule for the piece of memory that hold references to
be fetched in "git fetch" was screwy, which has been cleaned up.
(merge b7410f6 km/fetch-do-not-free-remote-name later to maint).
* "git bisect" makes an internal call to "git diff-tree" when
bisection finds the culprit, but this call did not initialize the
data structure to pass to the diff-tree API correctly.
(merge 43ec550 jk/bisect-show-tree later to maint).
* Further preparatory clean-up for "worktree" feature continues.
(merge 0409e0b nd/worktree-cleanup-post-head-protection later to maint).
* Formats of the various data (and how to validate them) where we use
GPG signature have been documented.
(merge cc6ee97 mg/signature-doc later to maint).
* A new run-command API function pipe_command() is introduced to
sanely feed data to the standard input while capturing data from
the standard output and the standard error of an external process,
which is cumbersome to hand-roll correctly without deadlocking.
The codepath to sign data in a prepared buffer with GPG has been
updated to use this API to read from the status-fd to check for
errors (instead of relying on GPG's exit status).
(merge efee955 jk/gpg-interface-cleanup later to maint).
Also contains various documentation updates and code clean-ups.
Fixes since v2.9
----------------
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).
* The commands in `git log` family take %C(auto) in a custom format
string. This unconditionally turned the color on, ignoring
--no-color or with --color=auto when the output is not connected to
a tty; this was corrected to make the format truly behave as
"auto".
(merge b15a3e0 et/pretty-format-c-auto later to maint).
* "git rev-list --count" whose walk-length is limited with "-n"
option did not work well with the counting optimized to look at the
bitmap index.
(merge fb85db8 jk/rev-list-count-with-bitmap later to maint).
* "git show -W" (extend hunks to cover the entire function, delimited
by lines that match the "funcname" pattern) used to show the entire
file when a change added an entire function at the end of the file,
which has been fixed.
(merge 6f8d9bc rs/xdiff-hunk-with-func-line later to maint).
* The documentation set has been updated so that literal commands,
configuration variables and environment variables are consistently
typeset in fixed-width font and bold in manpages.
* "git svn propset" subcommand that was added in 2.3 days is
documented now.
* The documentation tries to consistently spell "GPG"; when
referring to the specific program name, "gpg" is used.
* "git reflog" stopped upon seeing an entry that denotes a branch
creation event (aka "unborn"), which made it appear as if the
reflog was truncated.
* The git-prompt scriptlet (in contrib/) was not friendly with those
who uses "set -u", which has been fixed.
* compat/regex code did not cleanly compile.
* A codepath that used alloca(3) to place an unbounded amount of data
on the stack has been updated to avoid doing so.
* "git update-index --add --chmod=+x file" may be usable as an escape
hatch, but not a friendly thing to force for people who do need to
use it regularly. "git add --chmod=+x file" can be used instead.
* Build improvements for gnome-keyring (in contrib/)
* "git status" used to say "working directory" when it meant "working
tree".
* Comments about misbehaving FreeBSD shells have been clarified with
the version number (9.x and before are broken, newer ones are OK).
* "git cherry-pick A" worked on an unborn branch, but "git
cherry-pick A..B" didn't.
* Fix an unintended regression in v2.9 that breaks "clone --depth"
that recurses down to submodules by forcing the submodules to also
be cloned shallowly, which many server instances that host upstream
of the submodules are not prepared for.
(merge 18a74a0 sb/clone-shallow-passthru later to maint).
* Fix unnecessarily waste in the idiomatic use of ': ${VAR=default}'
to set the default value, without enclosing it in double quotes.
(merge 01247e0 lc/shell-default-value-noexpand later to maint).
* Some platform-specific code had non-ANSI strict declarations of C
functions that do not take any parameters, which has been
corrected.
(merge 0767172 js/mingw-parameter-less-c-functions later to maint).
* The internal code used to show local timezone offset is not
prepared to handle timestamps beyond year 2100, and gave a
bogus offset value to the caller. Use a more benign looking
+0000 instead and let "git log" going in such a case, instead
of aborting.
(merge bab7483 jk/tzoffset-fix later to maint).
* One among four invocations of readlink(1) in our test suite has
been rewritten so that the test can run on systems without the
command (others are in valgrind test framework and t9802).
(merge d2addc3 ak/t7800-wo-readlink later to maint).
* t/perf needs /usr/bin/time with GNU extension; the invocation of it
is updated to "gtime" on Darwin.
(merge e3efa94 js/perf-on-apple later to maint).
* A bug, which caused "git p4" while running under verbose mode to
report paths that are omitted due to branch prefix incorrectly, has
been fixed; the command said "Ignoring file outside of prefix" for
paths that are _inside_.
(merge 09667d0 ao/p4-has-branch-prefix-fix later to maint).
* Other minor clean-ups and documentation updates
(merge e51b0df pb/commit-editmsg-path later to maint).
(merge b333d0d jk/send-pack-stdio later to maint).
(merge fcf0fe9 lf/sideband-returns-void later to maint).
(merge 5819c2e sb/t5614-modernize later to maint).
(merge fe0537a cb/t7810-test-label-fix later to maint).
(merge 412b9a1 jc/t2300-setup later to maint).
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