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Git 2.17 Release Notes
======================
Updates since v2.16
-------------------
UI, Workflows & Features
* "diff" family of commands learned "--find-object=<object-id>" option
to limit the findings to changes that involve the named object.
* "git format-patch" learned to give 72-cols to diffstat, which is
consistent with other line length limits the subcommand uses for
its output meant for e-mails.
* The log from "git daemon" can be redirected with a new option; one
relevant use case is to send the log to standard error (instead of
syslog) when running it from inetd.
* "git rebase" learned to take "--allow-empty-message" option.
* "git am" has learned the "--quit" option, in addition to the
existing "--abort" option; having the pair mirrors a few other
commands like "rebase" and "cherry-pick".
* "git worktree add" learned to run the post-checkout hook, just like
"git clone" runs it upon the initial checkout.
Performance, Internal Implementation, Development Support etc.
* More perf tests for threaded grep
* "perf" test output can be sent to codespeed server.
(merge 19cf57a92e cc/codespeed later to maint).
* The build procedure for perl/ part has been greatly simplified by
weaning ourselves off of MakeMaker.
* In preparation for implementing narrow/partial clone, the machinery
for checking object connectivity used by gc and fsck has been
taught that a missing object is OK when it is referenced by a
packfile specially marked as coming from trusted repository that
promises to make them available on-demand and lazily.
* The machinery to clone & fetch, which in turn involves packing and
unpacking objects, has been told how to omit certain objects using
the filtering mechanism introduced by another topic. It now knows
to mark the resulting pack as a promisor pack to tolerate missing
objects, laying foundation for "narrow" clones.
* The first step to getting rid of mru API and using the
doubly-linked list API directly instead.
* Retire mru API as it does not give enough abstraction over
underlying list API to be worth it.
* Rewrite two more "git submodule" subcommands in C.
* The tracing machinery learned to report tweaking of environment
variables as well.
(merge 090a09272a nd/trace-with-env later to maint).
* Update Coccinelle rules to catch and optimize strbuf_addf(&buf, "%s", str)
(merge cd9a4b6d93 rs/strbuf-cocci-workaround later to maint).
* Prevent "clang-format" from breaking line after function return type.
(merge a3715d43e8 po/clang-format-functype-weight later to maint).
* The sequencer infrastructure is shared across "git cherry-pick",
"git rebase -i", etc., and has always spawned "git commit" when it
needs to create a commit. It has been taught to do so internally,
when able, by reusing the codepath "git commit" itself uses, which
gives performance boost for a few tens of percents in some sample
scenarios.
* Push the submodule version of collision-detecting SHA-1 hash
implementation a bit harder on builders.
* Avoid mmapping small files while using packed refs (especially ones
with zero size, which would cause later munmap() to fail).
(merge ba41a8b600 kg/packed-ref-cache-fix later to maint).
* Conversion from uchar[20] to struct object_id continues.
* More tests for wildmatch functions.
* The code to binary search starting from a fan-out table (which is
how the packfile is indexed with object names) has been refactored
into a reusable helper.
Also contains various documentation updates and code clean-ups.
Fixes since v2.16
-----------------
* An old regression in "git describe --all $annotated_tag^0" has been
fixed.
* "git status" after moving a path in the working tree (hence making
it appear "removed") and then adding with the -N option (hence
making that appear "added") detected it as a rename, but did not
report the old and new pathnames correctly.
* "git svn dcommit" did not take into account the fact that a
svn+ssh:// URL with a username@ (typically used for pushing) refers
to the same SVN repository without the username@ and failed when
svn.pushmergeinfo option is set.
* API clean-up around revision traversal.
* "git merge -Xours/-Xtheirs" learned to use our/their version when
resolving a conflicting updates to a symbolic link.
* "git clone $there $here" is allowed even when here directory exists
as long as it is an empty directory, but the command incorrectly
removed it upon a failure of the operation.
* "git commit --fixup" did not allow "-m<message>" option to be used
at the same time; allow it to annotate resulting commit with more
text.
* When resetting the working tree files recursively, the working tree
of submodules are now also reset to match.
* "git stash -- <pathspec>" incorrectly blew away untracked files in
the directory that matched the pathspec, which has been corrected.
* Instead of maintaining home-grown email address parsing code, ship
a copy of reasonably recent Mail::Address to be used as a fallback
in 'git send-email' when the platform lacks it.
(merge d60be8acab mm/send-email-fallback-to-local-mail-address later to maint).
* "git add -p" was taught to ignore local changes to submodules as
they do not interfere with the partial addition of regular changes
anyway.
* Avoid showing a warning message in the middle of a line of "git
diff" output.
(merge 4e056c989f nd/diff-flush-before-warning later to maint).
* The http tracing code, often used to debug connection issues,
learned to redact potentially sensitive information from its output
so that it can be more safely sharable.
(merge 8ba18e6fa4 jt/http-redact-cookies later to maint).
* Crash fix for a corner case where an error codepath tried to unlock
what it did not acquire lock on.
(merge 81fcb698e0 mr/packed-ref-store-fix later to maint).
* The split-index mode had a few corner case bugs fixed.
(merge ae59a4e44f tg/split-index-fixes later to maint).
* Assorted fixes to "git daemon".
(merge ed15e58efe jk/daemon-fixes later to maint).
* Completion of "git merge -s<strategy>" (in contrib/) did not work
well in non-C locale.
(merge 7cc763aaa3 nd/list-merge-strategy later to maint).
* Workaround for segfault with more recent versions of SVN.
(merge 7f6f75e97a ew/svn-branch-segfault-fix later to maint).
* Plug recently introduced leaks in fsck.
(merge ba3a08ca0e jt/fsck-code-cleanup later to maint).
* "git pull --rebase" did not pass verbosity setting down when
recursing into a submodule.
(merge a56771a668 sb/pull-rebase-submodule later to maint).
* The way "git reset --hard" reports the commit the updated HEAD
points at is made consistent with the way how the commit title is
generated by the other parts of the system. This matters when the
title is spread across physically multiple lines.
(merge 1cf823fb68 tg/reset-hard-show-head-with-pretty later to maint).
* Test fixes.
(merge 63b1a175ee sg/test-i18ngrep later to maint).
* Some bugs around "untracked cache" feature have been fixed. This
will notice corrupt data in the untracked cache left by old and
buggy code and issue a warning---the index can be fixed by clearing
the untracked cache from it.
(merge 0cacebf099 nd/fix-untracked-cache-invalidation later to maint).
(merge 7bf0be7501 ab/untracked-cache-invalidation-docs later to maint).
* "git blame HEAD COPYING" in a bare repository failed to run, while
"git blame HEAD -- COPYING" run just fine. This has been corrected.
* "git add" files in the same directory, but spelling the directory
path in different cases on case insensitive filesystem, corrupted
the name hash data structure and led to unexpected results. This
has been corrected.
(merge c95525e90d bp/name-hash-dirname-fix later to maint).
* "git rebase -p" mangled log messages of a merge commit, which is
now fixed.
(merge ed5144d7eb js/fix-merge-arg-quoting-in-rebase-p later to maint).
* Some low level protocol codepath could crash when they get an
unexpected flush packet, which is now fixed.
(merge bb1356dc64 js/packet-read-line-check-null later to maint).
* "git check-ignore" with multiple paths got confused when one is a
file and the other is a directory, which has been fixed.
(merge d60771e930 rs/check-ignore-multi later to maint).
* "git describe $garbage" stopped giving any errors when the garbage
happens to be a string with 40 hexadecimal letters.
(merge a8e7a2bf0f sb/describe-blob later to maint).
* Code to unquote single-quoted string (used in the parser for
configuration files, etc.) did not diagnose bogus input correctly
and produced bogus results instead.
(merge ddbbf8eb25 jk/sq-dequote-on-bogus-input later to maint).
* Many places in "git apply" knew that "/dev/null" that signals
"there is no such file on this side of the diff" can be followed by
whitespace and garbage when parsing a patch, except for one, which
made an otherwise valid patch (e.g. ones from subversion) rejected.
(merge e454ad4bec tk/apply-dev-null-verify-name-fix later to maint).
* We no longer create any *.spec file, so "make clean" should not
remove it.
(merge 4321bdcabb tz/do-not-clean-spec-file later to maint).
* "git push" over http transport did not unquote the push-options
correctly.
(merge 90dce21eb0 jk/push-options-via-transport-fix later to maint).
* Other minor doc, test and build updates and code cleanups.
(merge e2a5a028c7 bw/oidmap-autoinit later to maint).
(merge ec3b4b06f8 cl/t9001-cleanup later to maint).
(merge e1b3f3dd38 ks/submodule-doc-updates later to maint).
(merge fbac558a9b rs/describe-unique-abbrev later to maint).
(merge 8462ff43e4 tb/crlf-conv-flags later to maint).
(merge 7d68bb0766 rb/hashmap-h-compilation-fix later to maint).
(merge 3449847168 cc/sha1-file-name later to maint).
(merge ad622a256f ds/use-get-be64 later to maint).
(merge f919ffebed sg/cocci-move-array later to maint).
(merge 4e801463c7 jc/mailinfo-cleanup-fix later to maint).
(merge ef5b3a6c5e nd/shared-index-fix later to maint).
(merge 9f5258cbb8 tz/doc-show-defaults-to-head later to maint).
(merge b780e4407d jc/worktree-add-short-help later to maint).
(merge ae239fc8e5 rs/cocci-strbuf-addf-to-addstr later to maint).
(merge 2e22a85e5c nd/ignore-glob-doc-update later to maint).
(merge 3738031581 jk/gettext-poison later to maint).
(merge 54360a1956 rj/sparse-updates later to maint).
(merge 12e31a6b12 sg/doc-test-must-fail-args later to maint).
(merge 760f1ad101 bc/doc-interpret-trailers-grammofix later to maint).
(merge 4ccf461f56 bp/fsmonitor later to maint).
(merge a6119f82b1 jk/test-hashmap-updates later to maint).
(merge 5aea9fe6cc rd/typofix later to maint).
(merge e4e5da2796 sb/status-doc-fix later to maint).
(merge 7976e901c8 gs/test-unset-xdg-cache-home later to maint).
(merge d023df1ee6 tg/worktree-create-tracking later to maint).
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