gitweb.git
Merge branch 'ys/bisect-object-id-missing-conversion... Junio C Hamano Tue, 10 Apr 2018 07:28:24 +0000 (16:28 +0900)

Merge branch 'ys/bisect-object-id-missing-conversion-fix'

Code clean-up.

* ys/bisect-object-id-missing-conversion-fix:
bisect: use oid_to_hex() for converting object_id hashes to hex strings

Merge branch 'yk/filter-branch-non-committish-refs'Junio C Hamano Tue, 10 Apr 2018 07:28:23 +0000 (16:28 +0900)

Merge branch 'yk/filter-branch-non-committish-refs'

when refs that do not point at committish are given, "git
filter-branch" gave a misleading error messages. This has been
corrected.

* yk/filter-branch-non-committish-refs:
filter-branch: fix errors caused by refs that point at non-committish

Merge branch 'nd/trace-with-env'Junio C Hamano Tue, 10 Apr 2018 07:28:22 +0000 (16:28 +0900)

Merge branch 'nd/trace-with-env'

Code cleanup.

* nd/trace-with-env:
run-command: use strbuf_addstr() for adding a string to a strbuf

Merge branch 'nd/parseopt-completion-more'Junio C Hamano Tue, 10 Apr 2018 07:28:22 +0000 (16:28 +0900)

Merge branch 'nd/parseopt-completion-more'

The mechanism to use parse-options API to automate the command line
completion continues to get extended and polished.

* nd/parseopt-completion-more:
completion: use __gitcomp_builtin in _git_cherry
completion: use __gitcomp_builtin in _git_ls_tree
completion: delete option-only completion commands
completion: add --option completion for most builtin commands
completion: factor out _git_xxx calling code
completion: mention the oldest version we need to support
git.c: add hidden option --list-parseopt-builtins
git.c: move cmd_struct declaration up

Merge branch 'ds/bsearch-hash'Junio C Hamano Tue, 10 Apr 2018 07:28:22 +0000 (16:28 +0900)

Merge branch 'ds/bsearch-hash'

Code to find the length to uniquely abbreviate object names based
on packfile content, which is a relatively recent addtion, has been
optimized to use the same fan-out table.

* ds/bsearch-hash:
sha1_name: use bsearch_pack() in unique_in_pack()
sha1_name: use bsearch_pack() for abbreviations
packfile: define and use bsearch_pack()
sha1_name: convert struct min_abbrev_data to object_id

Merge branch 'ws/rebase-p'Junio C Hamano Tue, 10 Apr 2018 07:28:21 +0000 (16:28 +0900)

Merge branch 'ws/rebase-p'

Code clean-up.

* ws/rebase-p:
rebase: remove merges_option and a blank line
rebase: remove unused code paths from git_rebase__interactive__preserve_merges
rebase: remove unused code paths from git_rebase__interactive
rebase: add and use git_rebase__interactive__preserve_merges
rebase: extract functions out of git_rebase__interactive
rebase: reindent function git_rebase__interactive
rebase: update invocation of rebase dot-sourced scripts
rebase-interactive: simplify pick_on_preserving_merges

Merge branch 'jk/diff-highlight-graph-fix'Junio C Hamano Tue, 10 Apr 2018 07:28:21 +0000 (16:28 +0900)

Merge branch 'jk/diff-highlight-graph-fix'

"diff-highlight" filter (in contrib/) learned to undertand "git log
--graph" output better.

* jk/diff-highlight-graph-fix:
diff-highlight: detect --graph by indent
diff-highlight: use flush() helper consistently
diff-highlight: test graphs with --color
diff-highlight: test interleaved parallel lines of history
diff-highlight: prefer "echo" to "cat" in tests
diff-highlight: use test_tick in graph test
diff-highlight: correct test graph diagram

Merge branch 'nd/remove-ignore-env-field'Junio C Hamano Tue, 10 Apr 2018 07:28:20 +0000 (16:28 +0900)

Merge branch 'nd/remove-ignore-env-field'

Code clean-up for the "repository" abstraction.

* nd/remove-ignore-env-field:
repository.h: add comment and clarify repo_set_gitdir
repository: delete ignore_env member
sha1_file.c: move delayed getenv(altdb) back to setup_git_env()
repository.c: delete dead functions
repository.c: move env-related setup code back to environment.c
repository: initialize the_repository in main()

Merge branch 'ps/contains-id-error-message'Junio C Hamano Tue, 10 Apr 2018 07:28:20 +0000 (16:28 +0900)

Merge branch 'ps/contains-id-error-message'

"git tag --contains no-such-commit" gave a full list of options
after giving an error message.

* ps/contains-id-error-message:
parse-options: do not show usage upon invalid option value

The first batch for 2.18 cycleJunio C Hamano Mon, 9 Apr 2018 23:31:10 +0000 (08:31 +0900)

The first batch for 2.18 cycle

Signed-off-by: Junio C Hamano <gitster@pobox.com>

Merge branch 'tg/stash-untracked-with-pathspec-fix'Junio C Hamano Mon, 9 Apr 2018 23:25:45 +0000 (08:25 +0900)

Merge branch 'tg/stash-untracked-with-pathspec-fix'

"git stash push -u -- <pathspec>" gave an unnecessary and confusing
error message when there was no tracked files that match the
<pathspec>, which has been fixed.

* tg/stash-untracked-with-pathspec-fix:
stash: drop superfluos pathspec parameter
stash push -u: don't create empty stash
stash push: avoid printing errors
stash: fix nonsense pipeline

Merge branch 'nd/worktree-prune'Junio C Hamano Mon, 9 Apr 2018 23:25:45 +0000 (08:25 +0900)

Merge branch 'nd/worktree-prune'

The way "git worktree prune" worked internally has been simplified,
by assuming how "git worktree move" moves an existing worktree to a
different place.

* nd/worktree-prune:
worktree prune: improve prune logic when worktree is moved
worktree: delete dead code
gc.txt: more details about what gc does

Merge branch 'bc/object-id'Junio C Hamano Mon, 9 Apr 2018 23:25:45 +0000 (08:25 +0900)

Merge branch 'bc/object-id'

Conversion from uchar[20] to struct object_id continues.

* bc/object-id: (36 commits)
convert: convert to struct object_id
sha1_file: introduce a constant for max header length
Convert lookup_replace_object to struct object_id
sha1_file: convert read_sha1_file to struct object_id
sha1_file: convert read_object_with_reference to object_id
tree-walk: convert tree entry functions to object_id
streaming: convert istream internals to struct object_id
tree-walk: convert get_tree_entry_follow_symlinks internals to object_id
builtin/notes: convert static functions to object_id
builtin/fmt-merge-msg: convert remaining code to object_id
sha1_file: convert sha1_object_info* to object_id
Convert remaining callers of sha1_object_info_extended to object_id
packfile: convert unpack_entry to struct object_id
sha1_file: convert retry_bad_packed_offset to struct object_id
sha1_file: convert assert_sha1_type to object_id
builtin/mktree: convert to struct object_id
streaming: convert open_istream to use struct object_id
sha1_file: convert check_sha1_signature to struct object_id
sha1_file: convert read_loose_object to use struct object_id
builtin/index-pack: convert struct ref_delta_entry to object_id
...

Merge branch 'ma/shortlog-revparse'Junio C Hamano Mon, 9 Apr 2018 23:25:44 +0000 (08:25 +0900)

Merge branch 'ma/shortlog-revparse'

"git shortlog cruft" aborted with a BUG message when run outside a
Git repository. The command has been taught to complain about
extra and unwanted arguments on its command line instead in such a
case.

* ma/shortlog-revparse:
shortlog: disallow left-over arguments outside repo
shortlog: add usage-string for stdin-reading
git-shortlog.txt: reorder usages

Merge branch 'ab/install-symlinks'Junio C Hamano Mon, 9 Apr 2018 23:25:44 +0000 (08:25 +0900)

Merge branch 'ab/install-symlinks'

The build procedure learned to optionally use symbolic links
(instead of hardlinks and copies) to install "git-foo" for built-in
commands, whose binaries are all identical.

* ab/install-symlinks:
Makefile: optionally symlink libexec/git-core binaries to bin/git
Makefile: add a gitexecdir_relative variable
Makefile: fix broken bindir_relative variable

Merge branch 'ml/filter-branch-no-op-error'Junio C Hamano Mon, 9 Apr 2018 23:25:44 +0000 (08:25 +0900)

Merge branch 'ml/filter-branch-no-op-error'

"git filter-branch" learned to use a different exit code to allow
the callers to tell the case where there was no new commits to
rewrite from other error cases.

* ml/filter-branch-no-op-error:
filter-branch: return 2 when nothing to rewrite

Merge branch 'ab/pcre-v2'Junio C Hamano Mon, 9 Apr 2018 23:25:43 +0000 (08:25 +0900)

Merge branch 'ab/pcre-v2'

Git can be built to use either v1 or v2 of the PCRE library, and so
far, the build-time configuration USE_LIBPCRE=YesPlease instructed
the build procedure to use v1, but now it means v2. USE_LIBPCRE1
and USE_LIBPCRE2 can be used to explicitly choose which version to
use, as before.

* ab/pcre-v2:
Makefile: make USE_LIBPCRE=YesPlease mean v2, not v1
configure: detect redundant --with-libpcre & --with-libpcre1
configure: fix a regression in PCRE v1 detection

Merge branch 'ti/fetch-everything-local-optim'Junio C Hamano Mon, 9 Apr 2018 23:25:43 +0000 (08:25 +0900)

Merge branch 'ti/fetch-everything-local-optim'

A "git fetch" from a repository with insane number of refs into a
repository that is already up-to-date still wasted too many cycles
making many lstat(2) calls to see if these objects at the tips
exist as loose objects locally. These lstat(2) calls are optimized
away by enumerating all loose objects beforehand.

It is unknown if the new strategy negatively affects existing use
cases, fetching into a repository with many loose objects from a
repository with small number of refs.

* ti/fetch-everything-local-optim:
fetch-pack.c: use oidset to check existence of loose object

Merge branch 'en/rename-directory-detection'Junio C Hamano Mon, 9 Apr 2018 23:25:43 +0000 (08:25 +0900)

Merge branch 'en/rename-directory-detection'

Rename detection logic in "diff" family that is used in "merge" has
learned to guess when all of x/a, x/b and x/c have moved to z/a,
z/b and z/c, it is likely that x/d added in the meantime would also
want to move to z/d by taking the hint that the entire directory
'x' moved to 'z'. A bug causing dirty files involved in a rename
to be overwritten during merge has also been fixed as part of this
work.

* en/rename-directory-detection: (29 commits)
merge-recursive: ensure we write updates for directory-renamed file
merge-recursive: avoid spurious rename/rename conflict from dir renames
directory rename detection: new testcases showcasing a pair of bugs
merge-recursive: fix remaining directory rename + dirty overwrite cases
merge-recursive: fix overwriting dirty files involved in renames
merge-recursive: avoid clobbering untracked files with directory renames
merge-recursive: apply necessary modifications for directory renames
merge-recursive: when comparing files, don't include trees
merge-recursive: check for file level conflicts then get new name
merge-recursive: add computation of collisions due to dir rename & merging
merge-recursive: check for directory level conflicts
merge-recursive: add get_directory_renames()
merge-recursive: make a helper function for cleanup for handle_renames
merge-recursive: split out code for determining diff_filepairs
merge-recursive: make !o->detect_rename codepath more obvious
merge-recursive: fix leaks of allocated renames and diff_filepairs
merge-recursive: introduce new functions to handle rename logic
merge-recursive: move the get_renames() function
directory rename detection: tests for handling overwriting dirty files
directory rename detection: tests for handling overwriting untracked files
...

Git 2.17 v2.17.0Junio C Hamano Mon, 2 Apr 2018 17:13:35 +0000 (10:13 -0700)

Git 2.17

Signed-off-by: Junio C Hamano <gitster@pobox.com>

Merge tag 'l10n-2.17.0-rnd1' of git://github.com/git... Junio C Hamano Mon, 2 Apr 2018 17:12:38 +0000 (10:12 -0700)

Merge tag 'l10n-2.17.0-rnd1' of git://github.com/git-l10n/git-po

l10n for Git 2.17.0 round 1

* tag 'l10n-2.17.0-rnd1' of git://github.com/git-l10n/git-po:
l10n: de.po: translate 132 new messages
l10n: zh_CN: review for git v2.17.0 l10n round 1
l10n: zh_CN: for git v2.17.0 l10n round 1
l10n: ko.po: Update Korean translation
l10n: fr.po: v2.17.0 no fuzzy
l10n: sv.po: Update Swedish translation (3376t0f0u)
l10n: Update Catalan translation
l10n: fr.po v2.17.0 round 1
l10n: vi.po(3376t): Updated Vietnamese translation for v2.17
l10n: bg.po: Updated Bulgarian translation (3376t)
l10n: es.po: Update Spanish translation 2.17.0
l10n: git.pot: v2.17.0 round 1 (132 new, 44 removed)
l10n: es.po: fixes to Spanish translation

Merge branch 'pw/add-p-single'Junio C Hamano Mon, 2 Apr 2018 17:10:54 +0000 (10:10 -0700)

Merge branch 'pw/add-p-single'

Hotfix.

* pw/add-p-single:
add -p: fix 2.17.0-rc* regression due to moved code

add -p: fix 2.17.0-rc* regression due to moved codeÆvar Arnfjörð Bjarmason Sat, 31 Mar 2018 12:50:58 +0000 (12:50 +0000)

add -p: fix 2.17.0-rc* regression due to moved code

Fix a regression in 88f6ffc1c2 ("add -p: only bind search key if
there's more than one hunk", 2018-02-13) which is present in
2.17.0-rc*, but not 2.16.0.

In Perl, regex variables like $1 always refer to the last regex
match. When the aforementioned change added a new regex match between
the old match and the corresponding code that was expecting $1, the $1
variable would always be undef, since the newly inserted regex match
doesn't have any captures.

As a result the "/" feature to search for a string in a hunk by regex
completely broke, on git.git:

$ perl -pi -e 's/Git/Tig/g' README.md
$ ./git --exec-path=$PWD add -p
[..]
Stage this hunk [y,n,q,a,d,j,J,g,/,s,e,?]? s
Split into 4 hunks.
[...]
Stage this hunk [y,n,q,a,d,j,J,g,/,s,e,?]? /Many
Use of uninitialized value $1 in string eq at /home/avar/g/git/git-add--interactive line 1568, <STDIN> line 1.
search for regex? Many

I.e. the initial "/regex" command wouldn't work, and would always emit
a warning and ask again for a regex, now it works as intended again.

Signed-off-by: Ævar Arnfjörð Bjarmason <avarab@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>

l10n: de.po: translate 132 new messagesRalf Thielow Fri, 16 Mar 2018 17:41:16 +0000 (18:41 +0100)

l10n: de.po: translate 132 new messages

Translate 132 new messages came from git.pot update in abc8de64d (l10n:
git.pot: v2.17.0 round 1 (132 new, 44 removed)).

Signed-off-by: Ralf Thielow <ralf.thielow@gmail.com>

Merge branch 'jh/partial-clone'Junio C Hamano Thu, 29 Mar 2018 22:39:59 +0000 (15:39 -0700)

Merge branch 'jh/partial-clone'

Hotfix.

* jh/partial-clone:
upload-pack: disable object filtering when disabled by config
unpack-trees: release oid_array after use in check_updates()

upload-pack: disable object filtering when disabled... Jonathan Nieder Wed, 28 Mar 2018 20:33:03 +0000 (13:33 -0700)

upload-pack: disable object filtering when disabled by config

When upload-pack gained partial clone support (v2.17.0-rc0~132^2~12,
2017-12-08), it was guarded by the uploadpack.allowFilter config item
to allow server operators to control when they start supporting it.

That config item didn't go far enough, though: it controls whether the
'filter' capability is advertised, but if a (custom) client ignores
the capability advertisement and passes a filter specification anyway,
the server would handle that despite allowFilter being false.

This is particularly significant if a security bug is discovered in
this new experimental partial clone code. Installations without
uploadpack.allowFilter ought not to be affected since they don't
intend to support partial clone, but they would be swept up into being
vulnerable.

Simplify and limit the attack surface by making uploadpack.allowFilter
disable the feature, not just the advertisement of it.

Signed-off-by: Jonathan Nieder <jrnieder@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>

l10n: zh_CN: review for git v2.17.0 l10n round 1Ray Chen Thu, 29 Mar 2018 07:09:20 +0000 (15:09 +0800)

l10n: zh_CN: review for git v2.17.0 l10n round 1

Signed-off-by: Ray Chen <oldsharp@gmail.com>

l10n: zh_CN: for git v2.17.0 l10n round 1Jiang Xin Thu, 22 Feb 2018 01:17:34 +0000 (09:17 +0800)

l10n: zh_CN: for git v2.17.0 l10n round 1

Translate 132 new messages (3376t0f0u) for git 2.17.0-rc0.

Reviewed-by: 依云 <lilydjwg@gmail.com>
Reviewed-by: Fangyi Zhou <fangyi.zhou@yuriko.moe>
Signed-off-by: Jiang Xin <worldhello.net@gmail.com>

Git 2.17-rc2 v2.17.0-rc2Junio C Hamano Wed, 28 Mar 2018 18:05:14 +0000 (11:05 -0700)

Git 2.17-rc2

Signed-off-by: Junio C Hamano <gitster@pobox.com>

Merge branch 'tg/stash-doc-typofix'Junio C Hamano Wed, 28 Mar 2018 18:04:25 +0000 (11:04 -0700)

Merge branch 'tg/stash-doc-typofix'

Hotfix.

* tg/stash-doc-typofix:
git-stash.txt: remove extra square bracket

Merge branch 'pc/submodule-helper'Junio C Hamano Wed, 28 Mar 2018 18:04:25 +0000 (11:04 -0700)

Merge branch 'pc/submodule-helper'

Hotfix.

* pc/submodule-helper:
submodule deinit: handle non existing pathspecs gracefully

Merge branch 'nd/parseopt-completion'Junio C Hamano Wed, 28 Mar 2018 18:04:24 +0000 (11:04 -0700)

Merge branch 'nd/parseopt-completion'

Hotfix for recently graduated topic that give help to completion
scripts from the Git subcommands that are being completed

* nd/parseopt-completion:
t9902: disable test on the list of merge-strategies under GETTEXT_POISON
completion: clear cached --options when sourcing the completion script

l10n: ko.po: Update Korean translationChangwoo Ryu Mon, 19 Mar 2018 04:59:50 +0000 (13:59 +0900)

l10n: ko.po: Update Korean translation

Signed-off-by: Changwoo Ryu <cwryu@debian.org>
Signed-off-by: Sihyeon Jang <uneedsihyeon@gmail.com>
Signed-off-by: Gwan-gyeong Mun <elongbug@gmail.com>
Reviewed-by: Changwoo Ryu <cwryu@debian.org>

submodule deinit: handle non existing pathspecs gracefullyStefan Beller Tue, 27 Mar 2018 23:28:24 +0000 (16:28 -0700)

submodule deinit: handle non existing pathspecs gracefully

This fixes a regression introduced in 2e612731b5 (submodule: port
submodule subcommand 'deinit' from shell to C, 2018-01-15), when
handling pathspecs that do not exist gracefully. This restores the
historic behavior of reporting the pathspec as unknown and returning
instead of reporting a bug.

Reported-by: Peter Oberndorfer <kumbayo84@arcor.de>
Signed-off-by: Stefan Beller <sbeller@google.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>

git-stash.txt: remove extra square bracketThomas Gummerer Mon, 26 Mar 2018 21:11:47 +0000 (22:11 +0100)

git-stash.txt: remove extra square bracket

In 1ada5020b3 ("stash: use stash_push for no verb form", 2017-02-28),
when the pathspec argument was introduced in 'git stash', that was also
documented. However I forgot to remove an extra square bracket after
the '--message' argument, even though the square bracket should have
been after the pathspec argument (where it was also added).

Remove the extra square bracket after the '--message' argument, to show
that the pathspec argument should be used with the 'push' verb.

While the pathspec argument can be used without the push verb, that's a
special case described later in the man page, and removing the first extra
square bracket instead of the second one makes the synopis easier to
understand.

Signed-off-by: Thomas Gummerer <t.gummerer@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>

unpack-trees: release oid_array after use in check_upda... René Scharfe Sun, 25 Mar 2018 16:31:48 +0000 (18:31 +0200)

unpack-trees: release oid_array after use in check_updates()

Signed-off-by: Rene Scharfe <l.s.r@web.de>
Signed-off-by: Junio C Hamano <gitster@pobox.com>

filter-branch: fix errors caused by refs that point... Yuki Kokubun Sun, 25 Mar 2018 16:54:58 +0000 (16:54 +0000)

filter-branch: fix errors caused by refs that point at non-committish

"git filter-branch -- --all" prints error messages when processing refs that
point at objects that are not committish. Such refs can be created by
"git replace" with trees or blobs. And also "git tag" with trees or blobs can
create such refs.

Filter these problematic refs out early, before they are seen by the logic to
see which refs have been modified and which have been left intact (which is
where the unwanted error messages come from), and warn that these refs are left
unwritten while doing so.

Signed-off-by: Yuki Kokubun <orga.chem.job@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>

run-command: use strbuf_addstr() for adding a string... René Scharfe Sun, 25 Mar 2018 10:57:50 +0000 (12:57 +0200)

run-command: use strbuf_addstr() for adding a string to a strbuf

Patch generated with Coccinelle and contrib/coccinelle/strbuf.cocci.

Signed-off-by: Rene Scharfe <l.s.r@web.de>
Signed-off-by: Junio C Hamano <gitster@pobox.com>

bisect: use oid_to_hex() for converting object_id hashe... René Scharfe Sun, 25 Mar 2018 10:57:36 +0000 (12:57 +0200)

bisect: use oid_to_hex() for converting object_id hashes to hex strings

Patch generated with Coccinelle and contrib/coccinelle/object_id.cocci.

Signed-off-by: Rene Scharfe <l.s.r@web.de>
Reviewed-by: brian m. carlson <sandals@crustytoothpaste.net>
Signed-off-by: Junio C Hamano <gitster@pobox.com>

completion: use __gitcomp_builtin in _git_cherryNguyễn Thái Ngọc Duy Sat, 24 Mar 2018 20:35:25 +0000 (21:35 +0100)

completion: use __gitcomp_builtin in _git_cherry

Signed-off-by: Nguyễn Thái Ngọc Duy <pclouds@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>

completion: use __gitcomp_builtin in _git_ls_treeNguyễn Thái Ngọc Duy Sat, 24 Mar 2018 20:35:24 +0000 (21:35 +0100)

completion: use __gitcomp_builtin in _git_ls_tree

Signed-off-by: Nguyễn Thái Ngọc Duy <pclouds@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>

completion: delete option-only completion commandsNguyễn Thái Ngọc Duy Sat, 24 Mar 2018 20:35:23 +0000 (21:35 +0100)

completion: delete option-only completion commands

The new function __git_complete_common can take over this job with
less code to maintain.

Signed-off-by: Nguyễn Thái Ngọc Duy <pclouds@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>

completion: add --option completion for most builtin... Nguyễn Thái Ngọc Duy Sat, 24 Mar 2018 20:35:22 +0000 (21:35 +0100)

completion: add --option completion for most builtin commands

Many builtin commands use parseopt which can expose the option list
via --git-completion-helper but do not have explicit support in
git-completion.bash. This patch detects those commands and uses
__gitcomp_builtin for option completion.

This does not pollute the command name completion though. "git <tab>"
will show you the same set as before. This only kicks in when you type
the correct command name.

Signed-off-by: Nguyễn Thái Ngọc Duy <pclouds@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>

completion: factor out _git_xxx calling codeNguyễn Thái Ngọc Duy Sat, 24 Mar 2018 20:35:21 +0000 (21:35 +0100)

completion: factor out _git_xxx calling code

Signed-off-by: Nguyễn Thái Ngọc Duy <pclouds@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>

completion: mention the oldest version we need to supportNguyễn Thái Ngọc Duy Sat, 24 Mar 2018 20:35:20 +0000 (21:35 +0100)

completion: mention the oldest version we need to support

This is more of a note for git-completion.bash contributors, not
users. The bash version is from MacOS [1]. Most Linux distros should
be 4.x at this point.

[1] https://public-inbox.org/git/%3CCAPig+cQXT1ov4MjzSzqiLBzr4wN1XcP7aSxMP+_dhtWtYwhDAA@mail.gmail.com%3E/

Signed-off-by: Nguyễn Thái Ngọc Duy <pclouds@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>

git.c: add hidden option --list-parseopt-builtinsNguyễn Thái Ngọc Duy Sat, 24 Mar 2018 20:35:19 +0000 (21:35 +0100)

git.c: add hidden option --list-parseopt-builtins

This is another step to help automate git-completion.bash. This option
gives a list of all builtin commands that do use parse_options(),
which supports another hidden option --git-completion-helper. The
output is prepared for easy consumption by git-completion.bash and
separates items by spaces instead of \n

Signed-off-by: Nguyễn Thái Ngọc Duy <pclouds@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>

git.c: move cmd_struct declaration upNguyễn Thái Ngọc Duy Sat, 24 Mar 2018 20:35:18 +0000 (21:35 +0100)

git.c: move cmd_struct declaration up

In a later patch we need access to one of these command option
constants near the top of this file. Move this block up so we will be
able to access the command options.

Signed-off-by: Nguyễn Thái Ngọc Duy <pclouds@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>

sha1_name: use bsearch_pack() in unique_in_pack()René Scharfe Sat, 24 Mar 2018 16:41:08 +0000 (17:41 +0100)

sha1_name: use bsearch_pack() in unique_in_pack()

Replace the custom binary search in unique_in_pack() with a call to
bsearch_pack(). This reduces code duplication and makes use of the
fan-out table of packs.

Signed-off-by: Rene Scharfe <l.s.r@web.de>
Signed-off-by: Junio C Hamano <gitster@pobox.com>

Merge branch 'fr_v2.17.0' of git://github.com/jnavila/gitJiang Xin Sun, 25 Mar 2018 13:24:02 +0000 (21:24 +0800)

Merge branch 'fr_v2.17.0' of git://github.com/jnavila/git

* 'fr_v2.17.0' of git://github.com/jnavila/git:
l10n: fr.po: v2.17.0 no fuzzy

rebase: remove merges_option and a blank lineWink Saville Fri, 23 Mar 2018 21:25:29 +0000 (14:25 -0700)

rebase: remove merges_option and a blank line

merges_option is unused in git_rebase__interactive and always empty in
git_rebase__interactive__preserve_merges so it can be removed.

Signed-off-by: Wink Saville <wink@saville.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>

rebase: remove unused code paths from git_rebase__inter... Wink Saville Fri, 23 Mar 2018 21:25:28 +0000 (14:25 -0700)

rebase: remove unused code paths from git_rebase__interactive__preserve_merges

Since git_rebase__interactive__preserve_merges is now always called with
$preserve_merges = t we can remove the unused code paths.

Signed-off-by: Wink Saville <wink@saville.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>

rebase: remove unused code paths from git_rebase__inter... Wink Saville Fri, 23 Mar 2018 21:25:27 +0000 (14:25 -0700)

rebase: remove unused code paths from git_rebase__interactive

Since git_rebase__interactive is now never called with
$preserve_merges = t we can remove those code paths.

Signed-off-by: Wink Saville <wink@saville.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>

rebase: add and use git_rebase__interactive__preserve_m... Wink Saville Fri, 23 Mar 2018 21:25:26 +0000 (14:25 -0700)

rebase: add and use git_rebase__interactive__preserve_merges

At the moment it's an exact copy of git_rebase__interactive except
the name has changed.

Signed-off-by: Wink Saville <wink@saville.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>

rebase: extract functions out of git_rebase__interactiveWink Saville Fri, 23 Mar 2018 21:25:25 +0000 (14:25 -0700)

rebase: extract functions out of git_rebase__interactive

The extracted functions are:
- initiate_action
- setup_reflog_action
- init_basic_state
- init_revisions_and_shortrevisions
- complete_action

Used by git_rebase__interactive

Signed-off-by: Wink Saville <wink@saville.com>
Helped-by: Junio C Hamano <gitster@pobox.com>
Helped-by: Johannes Schindelin <Johannes.Schindelin@gmx.de>
Signed-off-by: Junio C Hamano <gitster@pobox.com>

rebase: reindent function git_rebase__interactiveWink Saville Fri, 23 Mar 2018 21:25:24 +0000 (14:25 -0700)

rebase: reindent function git_rebase__interactive

Signed-off-by: Wink Saville <wink@saville.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>

rebase: update invocation of rebase dot-sourced scriptsWink Saville Fri, 23 Mar 2018 21:25:23 +0000 (14:25 -0700)

rebase: update invocation of rebase dot-sourced scripts

Due to historical reasons, the backend scriptlets for "git rebase"
are structured a bit unusually. As originally designed,
dot-sourcing them from "git rebase" was sufficient to invoke the
specific backend.

However, it was later discovered that some shell implementations
(e.g. FreeBSD 9.x) misbehaved by continuing to execute statements
following a top-level "return" rather than returning control to
the next statement in "git rebase" after dot-sourcing the
scriptlet. To work around this shortcoming, the whole body of
git-rebase--$backend.sh was made into a shell function
git_rebase__$backend, and then the very last line of the scriptlet
called that function.

A more normal architecture is for a dot-sourced scriptlet merely
to define functions (thus acting as a function library), and for
those functions to be called by the script doing the dot-sourcing.
Migrate to this arrangement by moving the git_rebase__$backend
call from the end of a scriptlet into "git rebase" itself.

While at it, remove the large comment block from each scriptlet
explaining this historic anomaly since it serves no purpose under
the new normalized architecture in which a scriptlet is merely a
function library.

Signed-off-by: Wink Saville <wink@saville.com>
Helped-by: Junio C Hamano <gitster@pobox.com>
Helped-by: Eric Sunshine <sunshine@sunshineco.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>

l10n: fr.po: v2.17.0 no fuzzyJean-Noël Avila Fri, 23 Mar 2018 22:03:37 +0000 (23:03 +0100)

l10n: fr.po: v2.17.0 no fuzzy

Signed-off-by: Jean-Noël Avila <jn.avila@free.fr>

t9902: disable test on the list of merge-strategies... Junio C Hamano Fri, 23 Mar 2018 17:40:06 +0000 (10:40 -0700)

t9902: disable test on the list of merge-strategies under GETTEXT_POISON

The code to learn the list of merge strategies from the output of
"git merge -s help" forces C locale, so that it can notice the
message shown to indicate where the list starts in the output.

However, GETTEXT_POISON build corrupts its output even when run in
the C locale, and we cannot expect this test to succeed.

Signed-off-by: Junio C Hamano <gitster@pobox.com>

repository.h: add comment and clarify repo_set_gitdirNguyễn Thái Ngọc Duy Fri, 23 Mar 2018 15:55:23 +0000 (16:55 +0100)

repository.h: add comment and clarify repo_set_gitdir

The argument name "optional" may mislead the reader to think this
option could be NULL. But it can't be. While at there, document a bit
more about struct set_gitdir_args.

Signed-off-by: Nguyễn Thái Ngọc Duy <pclouds@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>

rebase-interactive: simplify pick_on_preserving_mergesWink Saville Fri, 23 Mar 2018 04:39:52 +0000 (21:39 -0700)

rebase-interactive: simplify pick_on_preserving_merges

Use compound if statement instead of nested if statements to
simplify pick_on_preserving_merges.

Signed-off-by: Wink Saville <wink@saville.com>
Acked-by: Johannes Schindelin <Johannes.Schindelin@gmx.de>
Signed-off-by: Junio C Hamano <gitster@pobox.com>

Sync with Git 2.16.3Junio C Hamano Thu, 22 Mar 2018 21:36:51 +0000 (14:36 -0700)

Sync with Git 2.16.3

Git 2.16.3 v2.16.3Junio C Hamano Thu, 22 Mar 2018 21:24:45 +0000 (14:24 -0700)

Git 2.16.3

Signed-off-by: Junio C Hamano <gitster@pobox.com>

Merge branch 'ms/non-ascii-ticks' into maintJunio C Hamano Thu, 22 Mar 2018 21:24:25 +0000 (14:24 -0700)

Merge branch 'ms/non-ascii-ticks' into maint

Doc markup fix.

* ms/non-ascii-ticks:
Documentation/gitsubmodules.txt: avoid non-ASCII apostrophes

Merge branch 'jk/cached-commit-buffer' into maintJunio C Hamano Thu, 22 Mar 2018 21:24:25 +0000 (14:24 -0700)

Merge branch 'jk/cached-commit-buffer' into maint

Code clean-up.

* jk/cached-commit-buffer:
revision: drop --show-all option
commit: drop uses of get_cached_commit_buffer()

Merge branch 'sm/mv-dry-run-update' into maintJunio C Hamano Thu, 22 Mar 2018 21:24:25 +0000 (14:24 -0700)

Merge branch 'sm/mv-dry-run-update' into maint

Code clean-up.

* sm/mv-dry-run-update:
mv: remove unneeded 'if (!show_only)'
t7001: add test case for --dry-run

Merge branch 'tg/worktree-create-tracking' into maintJunio C Hamano Thu, 22 Mar 2018 21:24:24 +0000 (14:24 -0700)

Merge branch 'tg/worktree-create-tracking' into maint

Hotfix for a recent topic.

* tg/worktree-create-tracking:
git-worktree.txt: fix indentation of example and text of 'add' command
git-worktree.txt: fix missing ")" typo

Merge branch 'gs/test-unset-xdg-cache-home' into maintJunio C Hamano Thu, 22 Mar 2018 21:24:24 +0000 (14:24 -0700)

Merge branch 'gs/test-unset-xdg-cache-home' into maint

Test update.

* gs/test-unset-xdg-cache-home:
test-lib.sh: unset XDG_CACHE_HOME

Merge branch 'sb/status-doc-fix' into maintJunio C Hamano Thu, 22 Mar 2018 21:24:23 +0000 (14:24 -0700)

Merge branch 'sb/status-doc-fix' into maint

Docfix.

* sb/status-doc-fix:
Documentation/git-status: clarify status table for porcelain mode

Merge branch 'rd/typofix' into maintJunio C Hamano Thu, 22 Mar 2018 21:24:22 +0000 (14:24 -0700)

Merge branch 'rd/typofix' into maint

Typofix.

* rd/typofix:
Correct mispellings of ".gitmodule" to ".gitmodules"
t/: correct obvious typo "detahced"

Merge branch 'bp/fsmonitor' into maintJunio C Hamano Thu, 22 Mar 2018 21:24:21 +0000 (14:24 -0700)

Merge branch 'bp/fsmonitor' into maint

Doc update for a recently added feature.

* bp/fsmonitor:
fsmonitor: update documentation to remove reference to invalid config settings

Merge branch 'bc/doc-interpret-trailers-grammofix'... Junio C Hamano Thu, 22 Mar 2018 21:24:21 +0000 (14:24 -0700)

Merge branch 'bc/doc-interpret-trailers-grammofix' into maint

Docfix.

* bc/doc-interpret-trailers-grammofix:
docs/interpret-trailers: fix agreement error

Merge branch 'sg/doc-test-must-fail-args' into maintJunio C Hamano Thu, 22 Mar 2018 21:24:19 +0000 (14:24 -0700)

Merge branch 'sg/doc-test-must-fail-args' into maint

Devdoc update.

* sg/doc-test-must-fail-args:
t: document 'test_must_fail ok=<signal-name>'

Merge branch 'rj/sparse-updates' into maintJunio C Hamano Thu, 22 Mar 2018 21:24:19 +0000 (14:24 -0700)

Merge branch 'rj/sparse-updates' into maint

Devtool update.

* rj/sparse-updates:
Makefile: suppress a sparse warning for pack-revindex.c
config.mak.uname: remove SPARSE_FLAGS setting for cygwin

Merge branch 'jk/gettext-poison' into maintJunio C Hamano Thu, 22 Mar 2018 21:24:18 +0000 (14:24 -0700)

Merge branch 'jk/gettext-poison' into maint

Test updates.

* jk/gettext-poison:
git-sh-i18n: check GETTEXT_POISON before USE_GETTEXT_SCHEME
t0205: drop redundant test

Merge branch 'nd/ignore-glob-doc-update' into maintJunio C Hamano Thu, 22 Mar 2018 21:24:18 +0000 (14:24 -0700)

Merge branch 'nd/ignore-glob-doc-update' into maint

Doc update.

* nd/ignore-glob-doc-update:
gitignore.txt: elaborate shell glob syntax

Merge branch 'rs/cocci-strbuf-addf-to-addstr' into... Junio C Hamano Thu, 22 Mar 2018 21:24:17 +0000 (14:24 -0700)

Merge branch 'rs/cocci-strbuf-addf-to-addstr' into maint

* rs/cocci-strbuf-addf-to-addstr:
cocci: simplify check for trivial format strings

Merge branch 'jc/worktree-add-short-help' into maintJunio C Hamano Thu, 22 Mar 2018 21:24:17 +0000 (14:24 -0700)

Merge branch 'jc/worktree-add-short-help' into maint

Error message fix.

* jc/worktree-add-short-help:
worktree: say that "add" takes an arbitrary commit in short-help

Merge branch 'tz/doc-show-defaults-to-head' into maintJunio C Hamano Thu, 22 Mar 2018 21:24:17 +0000 (14:24 -0700)

Merge branch 'tz/doc-show-defaults-to-head' into maint

Doc update.

* tz/doc-show-defaults-to-head:
doc: mention 'git show' defaults to HEAD

Merge branch 'nd/shared-index-fix' into maintJunio C Hamano Thu, 22 Mar 2018 21:24:16 +0000 (14:24 -0700)

Merge branch 'nd/shared-index-fix' into maint

Code clean-up.

* nd/shared-index-fix:
read-cache: don't write index twice if we can't write shared index
read-cache.c: move tempfile creation/cleanup out of write_shared_index
read-cache.c: change type of "temp" in write_shared_index()

Merge branch 'jc/mailinfo-cleanup-fix' into maintJunio C Hamano Thu, 22 Mar 2018 21:24:16 +0000 (14:24 -0700)

Merge branch 'jc/mailinfo-cleanup-fix' into maint

Corner case bugfix.

* jc/mailinfo-cleanup-fix:
mailinfo: avoid segfault when can't open files

Merge branch 'rb/hashmap-h-compilation-fix' into maintJunio C Hamano Thu, 22 Mar 2018 21:24:15 +0000 (14:24 -0700)

Merge branch 'rb/hashmap-h-compilation-fix' into maint

Code clean-up.

* rb/hashmap-h-compilation-fix:
hashmap.h: remove unused variable

Merge branch 'rs/describe-unique-abbrev' into maintJunio C Hamano Thu, 22 Mar 2018 21:24:14 +0000 (14:24 -0700)

Merge branch 'rs/describe-unique-abbrev' into maint

Code clean-up.

* rs/describe-unique-abbrev:
describe: use strbuf_add_unique_abbrev() for adding short hashes

Merge branch 'ks/submodule-doc-updates' into maintJunio C Hamano Thu, 22 Mar 2018 21:24:13 +0000 (14:24 -0700)

Merge branch 'ks/submodule-doc-updates' into maint

Doc updates.

* ks/submodule-doc-updates:
Doc/git-submodule: improve readability and grammar of a sentence
Doc/gitsubmodules: make some changes to improve readability and syntax

Merge branch 'cl/t9001-cleanup' into maintJunio C Hamano Thu, 22 Mar 2018 21:24:13 +0000 (14:24 -0700)

Merge branch 'cl/t9001-cleanup' into maint

Test clean-up.

* cl/t9001-cleanup:
t9001: use existing helper in send-email test

Merge branch 'bw/oidmap-autoinit' into maintJunio C Hamano Thu, 22 Mar 2018 21:24:12 +0000 (14:24 -0700)

Merge branch 'bw/oidmap-autoinit' into maint

Code clean-up.

* bw/oidmap-autoinit:
oidmap: ensure map is initialized

Merge branch 'sg/test-i18ngrep' into maintJunio C Hamano Thu, 22 Mar 2018 21:24:12 +0000 (14:24 -0700)

Merge branch 'sg/test-i18ngrep' into maint

Test fixes.

* sg/test-i18ngrep:
t: make 'test_i18ngrep' more informative on failure
t: validate 'test_i18ngrep's parameters
t: move 'test_i18ncmp' and 'test_i18ngrep' to 'test-lib-functions.sh'
t5536: let 'test_i18ngrep' read the file without redirection
t5510: consolidate 'grep' and 'test_i18ngrep' patterns
t4001: don't run 'git status' upstream of a pipe
t6022: don't run 'git merge' upstream of a pipe
t5812: add 'test_i18ngrep's missing filename parameter
t5541: add 'test_i18ngrep's missing filename parameter

Merge branch 'jt/fsck-code-cleanup' into maintJunio C Hamano Thu, 22 Mar 2018 21:24:12 +0000 (14:24 -0700)

Merge branch 'jt/fsck-code-cleanup' into maint

Plug recently introduced leaks in fsck.

* jt/fsck-code-cleanup:
fsck: fix leak when traversing trees

Merge branch 'ew/svn-branch-segfault-fix' into maintJunio C Hamano Thu, 22 Mar 2018 21:24:11 +0000 (14:24 -0700)

Merge branch 'ew/svn-branch-segfault-fix' into maint

Workaround for segfault with more recent versions of SVN.

* ew/svn-branch-segfault-fix:
git-svn: control destruction order to avoid segfault

Merge branch 'nd/list-merge-strategy' into maintJunio C Hamano Thu, 22 Mar 2018 21:24:11 +0000 (14:24 -0700)

Merge branch 'nd/list-merge-strategy' into maint

Completion of "git merge -s<strategy>" (in contrib/) did not work
well in non-C locale.

* nd/list-merge-strategy:
completion: fix completing merge strategies on non-C locales

Merge branch 'jk/daemon-fixes' into maintJunio C Hamano Thu, 22 Mar 2018 21:24:10 +0000 (14:24 -0700)

Merge branch 'jk/daemon-fixes' into maint

Assorted fixes to "git daemon".

* jk/daemon-fixes:
daemon: fix length computation in newline stripping
t/lib-git-daemon: add network-protocol helpers
daemon: handle NULs in extended attribute string
daemon: fix off-by-one in logging extended attributes
t/lib-git-daemon: record daemon log
t5570: use ls-remote instead of clone for interp tests

Merge branch 'tg/split-index-fixes' into maintJunio C Hamano Thu, 22 Mar 2018 21:24:10 +0000 (14:24 -0700)

Merge branch 'tg/split-index-fixes' into maint

The split-index mode had a few corner case bugs fixed.

* tg/split-index-fixes:
travis: run tests with GIT_TEST_SPLIT_INDEX
split-index: don't write cache tree with null oid entries
read-cache: fix reading the shared index for other repos

Merge branch 'mr/packed-ref-store-fix' into maintJunio C Hamano Thu, 22 Mar 2018 21:24:10 +0000 (14:24 -0700)

Merge branch 'mr/packed-ref-store-fix' into maint

Crash fix for a corner case where an error codepath tried to unlock
what it did not acquire lock on.

* mr/packed-ref-store-fix:
files_initial_transaction_commit(): only unlock if locked

Merge branch 'jt/http-redact-cookies' into maintJunio C Hamano Thu, 22 Mar 2018 21:24:09 +0000 (14:24 -0700)

Merge branch 'jt/http-redact-cookies' into 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.

* jt/http-redact-cookies:
http: support omitting data from traces
http: support cookie redaction when tracing

Merge branch 'nd/diff-flush-before-warning' into maintJunio C Hamano Thu, 22 Mar 2018 21:24:09 +0000 (14:24 -0700)

Merge branch 'nd/diff-flush-before-warning' into maint

Avoid showing a warning message in the middle of a line of "git
diff" output.

* nd/diff-flush-before-warning:
diff.c: flush stdout before printing rename warnings

Merge branch 'sg/travis-build-during-script-phase'... Junio C Hamano Thu, 22 Mar 2018 21:24:08 +0000 (14:24 -0700)

Merge branch 'sg/travis-build-during-script-phase' into maint

Build the executable in 'script' phase in Travis CI integration, to
follow the established practice, rather than during 'before_script'
phase. This allows the CI categorize the failures better ('failed'
is project's fault, 'errored' is build environment's).

* sg/travis-build-during-script-phase:
travis-ci: build Git during the 'script' phase

parse-options: do not show usage upon invalid option... Paul-Sebastian Ungureanu Thu, 22 Mar 2018 18:43:51 +0000 (20:43 +0200)

parse-options: do not show usage upon invalid option value

Usually, the usage should be shown only if the user does not know what
options are available. If the user specifies an invalid value, the user
is already aware of the available options. In this case, there is no
point in displaying the usage anymore.

This patch applies to "git tag --contains", "git branch --contains",
"git branch --points-at", "git for-each-ref --contains" and many more.

Signed-off-by: Paul-Sebastian Ungureanu <ungureanupaulsebastian@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>

sha1_name: use bsearch_pack() for abbreviationsDerrick Stolee Thu, 22 Mar 2018 17:40:10 +0000 (13:40 -0400)

sha1_name: use bsearch_pack() for abbreviations

When computing abbreviation lengths for an object ID against a single
packfile, the method find_abbrev_len_for_pack() currently implements
binary search. This is one of several implementations. One issue with
this implementation is that it ignores the fanout table in the pack-
index.

Translate this binary search to use the existing bsearch_pack() method
that correctly uses a fanout table.

Due to the use of the fanout table, the abbreviation computation is
slightly faster than before. For a fully-repacked copy of the Linux
repo, the following 'git log' commands improved:

* git log --oneline --parents --raw
Before: 59.2s
After: 56.9s
Rel %: -3.8%

* git log --oneline --parents
Before: 6.48s
After: 5.91s
Rel %: -8.9%

Signed-off-by: Derrick Stolee <dstolee@microsoft.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>

packfile: define and use bsearch_pack()Derrick Stolee Thu, 22 Mar 2018 17:40:09 +0000 (13:40 -0400)

packfile: define and use bsearch_pack()

The method bsearch_hash() generalizes binary searches using a
fanout table. The only consumer is currently find_pack_entry_one().
It requires a bit of pointer arithmetic to align the fanout table
and the lookup table depending on the pack-index version.

Extract the pack-index pointer arithmetic to a new method,
bsearch_pack(), so this can be re-used in other code paths.

Signed-off-by: Derrick Stolee <dstolee@microsoft.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>

sha1_name: convert struct min_abbrev_data to object_idbrian m. carlson Thu, 22 Mar 2018 17:40:08 +0000 (13:40 -0400)

sha1_name: convert struct min_abbrev_data to object_id

This structure is only written to in one place, where we already have a
struct object_id. Convert the struct to use a struct object_id instead.

Signed-off-by: brian m. carlson <sandals@crustytoothpaste.net>
Signed-off-by: Junio C Hamano <gitster@pobox.com>

completion: clear cached --options when sourcing the... SZEDER Gábor Thu, 22 Mar 2018 14:16:04 +0000 (15:16 +0100)

completion: clear cached --options when sourcing the completion script

The established way to update the completion script in an already
running shell is to simply source it again: this brings in any new
--options and features, and clears caching variables. E.g. it clears
the variables caching the list of (all|porcelain) git commands, so
when they are later lazy-initialized again, then they will list and
cache any newly installed commmands as well.

Unfortunately, since d401f3debc (git-completion.bash: introduce
__gitcomp_builtin, 2018-02-09) and subsequent patches this doesn't
work for a lot of git commands' options. To eliminate a lot of
hard-to-maintain hard-coded lists of options, those commits changed
the completion script to use a bunch of programmatically created and
lazy-initialized variables to cache the options of those builtin
porcelain commands that use parse-options. These variables are not
cleared upon sourcing the completion script, therefore they continue
caching the old lists of options, even when some commands recently
learned new options or when deprecated options were removed.

Always 'unset' these variables caching the options of builtin commands
when sourcing the completion script.

Redirect 'unset's stderr to /dev/null, because ZSH's 'unset' complains
if it's invoked without any arguments, i.e. no variables caching
builtin's options are set. This can happen, if someone were to source
the completion script twice without completing any --options in
between. Bash stays silent in this case.

Add tests to ensure that these variables are indeed cleared when the
completion script is sourced; not just the variables caching options,
but all other caching variables, i.e. the variables caching commands,
porcelain commands and merge strategies as well.

Signed-off-by: SZEDER Gábor <szeder.dev@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>