gitweb.git
t3700-add: do not check working tree file mode without... Johannes Sixt Tue, 20 Sep 2016 06:18:25 +0000 (08:18 +0200)

t3700-add: do not check working tree file mode without POSIXPERM

A recently introduced test checks the result of 'git status' after
setting the executable bit on a file. This check does not yield the
expected result when the filesystem does not support the executable
bit.

What we care about is that a file added with "--chmod=+x" has
executable bit in the index and that "--chmod=+x" (or any other
options for that matter) does not muck with working tree files.
The former is tested by other existing tests, so let's check the
latter more explicitly and only under POSIXPERM prerequisite.

Signed-off-by: Johannes Sixt <j6t@kdbg.org>
Signed-off-by: Junio C Hamano <gitster@pobox.com>

t3700-add: create subdirectory gentlyJohannes Sixt Tue, 20 Sep 2016 06:16:11 +0000 (08:16 +0200)

t3700-add: create subdirectory gently

The subdirectory 'sub' is created early in the test file. Later, a test
case removes it during its clean-up actions. However, this test case is
protected by POSIXPERM. Consequently, 'sub' remains when the POSIXPERM
prerequisite is not satisfied. Later, a recently introduced test case
creates 'sub' again. Use -p with mkdir so that it does not fail if 'sub'
already exists.

Signed-off-by: Johannes Sixt <j6t@kdbg.org>
Signed-off-by: Junio C Hamano <gitster@pobox.com>

add: modify already added files when --chmod is givenThomas Gummerer Wed, 14 Sep 2016 21:07:47 +0000 (22:07 +0100)

add: modify already added files when --chmod is given

When the chmod option was added to git add, it was hooked up to the diff
machinery, meaning that it only works when the version in the index
differs from the version on disk.

As the option was supposed to mirror the chmod option in update-index,
which always changes the mode in the index, regardless of the status of
the file, make sure the option behaves the same way in git add.

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

read-cache: introduce chmod_index_entryThomas Gummerer Wed, 14 Sep 2016 21:07:46 +0000 (22:07 +0100)

read-cache: introduce chmod_index_entry

As there are chmod options for both add and update-index, introduce a
new chmod_index_entry function to do the work. Use it in update-index,
while it will be used in add in the next patch.

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

update-index: add test for chmod flagsThomas Gummerer Wed, 14 Sep 2016 21:07:45 +0000 (22:07 +0100)

update-index: add test for chmod flags

Currently there is no test checking the expected behaviour when multiple
chmod flags with different arguments are passed. As argument handling
is not in line with other git commands it's easy to miss and
accidentally change the current behaviour.

While there, fix the argument type of chmod_path, which takes an int,
but had a char passed in.

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

Merge branch 'ib/t3700-add-chmod-x-updates' into tg... Junio C Hamano Wed, 14 Sep 2016 22:02:25 +0000 (15:02 -0700)

Merge branch 'ib/t3700-add-chmod-x-updates' into tg/add-chmod+x-fix

Newly added tests to this topic uses helper functions that did not
exist back when the bug being fixed by the topic was introduced.

* ib/t3700-add-chmod-x-updates:
t3700: add a test_mode_in_index helper function
t3700: merge two tests into one
t3700: remove unwanted leftover files before running new tests

add: document the chmod optionThomas Gummerer Mon, 12 Sep 2016 21:08:15 +0000 (22:08 +0100)

add: document the chmod option

The git add --chmod option was introduced in 4e55ed3 ("add: add
--chmod=+x / --chmod=-x options", 2016-05-31), but was never
documented. Document the feature.

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

t3700: add a test_mode_in_index helper functionIngo Brückl Sat, 30 Jul 2016 20:13:54 +0000 (22:13 +0200)

t3700: add a test_mode_in_index helper function

The case statement to check the file mode of a staged file appears
a number of times.

Simplify the test by utilizing a test_mode_in_index helper function.

Signed-off-by: Ingo Brückl <ib@wupperonline.de>
Signed-off-by: Junio C Hamano <gitster@pobox.com>

t3700: merge two tests into oneIngo Brückl Sat, 30 Jul 2016 20:13:48 +0000 (22:13 +0200)

t3700: merge two tests into one

Depending on the underlying platform a chmod may be a noop. Although it
wouldn't harm the result of the '--chmod=-x' test, there is a more
robust way to make sure the --chmod option works both ways.

Merge the two separate tests for the --chmod option into one, checking
both permissions on the same file.

Signed-off-by: Ingo Brückl <ib@wupperonline.de>
Signed-off-by: Junio C Hamano <gitster@pobox.com>

t3700: remove unwanted leftover files before running... Ingo Brückl Sat, 30 Jul 2016 20:13:38 +0000 (22:13 +0200)

t3700: remove unwanted leftover files before running new tests

When an earlier test that has prerequisite is skipped, files
used by later tests may be left in the working tree in an
unexpected state. For example, a test runs this sequence:

echo foo >xfoo1 && chmod 755 xfoo1

to create an executable file xfoo1, expecting that xfoo1
does not exist before it runs in the test sequence.
However, the absence of this file depends on "git reset
--hard" done in an earlier test, that is skipped when SANITY
prerequisite is not met, and worse yet, xfoo1 originally is
created as a symbolic link, which means the chmod does not
affect the modes of xfoo1 as this test expects.

Fix this by starting the test with "rm -f xfoo1" to make
sure the file is created from scratch, and do the same to
other similar tests.

Signed-off-by: Ingo Brückl <ib@wupperonline.de>
Signed-off-by: Junio C Hamano <gitster@pobox.com>

add: add --chmod=+x / --chmod=-x optionsEdward Thomson Tue, 31 May 2016 22:08:18 +0000 (17:08 -0500)

add: add --chmod=+x / --chmod=-x options

The executable bit will not be detected (and therefore will not be
set) for paths in a repository with `core.filemode` set to false,
though the users may still wish to add files as executable for
compatibility with other users who _do_ have `core.filemode`
functionality. For example, Windows users adding shell scripts may
wish to add them as executable for compatibility with users on
non-Windows.

Although this can be done with a plumbing command
(`git update-index --add --chmod=+x foo`), teaching the `git-add`
command allows users to set a file executable with a command that
they're already familiar with.

Signed-off-by: Edward Thomson <ethomson@edwardthomson.com>
Helped-by: Johannes Schindelin <johannes.schindelin@gmx.de>
Signed-off-by: Junio C Hamano <gitster@pobox.com>

Git 2.9-rc1 v2.9.0-rc1Junio C Hamano Tue, 31 May 2016 21:07:08 +0000 (14:07 -0700)

Git 2.9-rc1

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

Merge branch 'maint'Junio C Hamano Tue, 31 May 2016 21:12:08 +0000 (14:12 -0700)

Merge branch 'maint'

* maint:
More topics for 2.8.4

More topics for 2.8.4Junio C Hamano Tue, 31 May 2016 21:11:38 +0000 (14:11 -0700)

More topics for 2.8.4

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

Merge branch 'sb/submodule-deinit-all' into maintJunio C Hamano Tue, 31 May 2016 21:09:46 +0000 (14:09 -0700)

Merge branch 'sb/submodule-deinit-all' into maint

Correct faulty recommendation to use "git submodule deinit ." when
de-initialising all submodules, which would result in a strange
error message in a pathological corner case.

* sb/submodule-deinit-all:
submodule deinit: require '--all' instead of '.' for all submodules

Merge branch 'bn/http-cookiefile-config' into maintJunio C Hamano Tue, 31 May 2016 21:08:28 +0000 (14:08 -0700)

Merge branch 'bn/http-cookiefile-config' into maint

"http.cookieFile" configuration variable clearly wants a pathname,
but we forgot to treat it as such by e.g. applying tilde expansion.

* bn/http-cookiefile-config:
http: expand http.cookieFile as a path
Documentation: config: improve word ordering for http.cookieFile

Merge branch 'jk/test-send-sh-x-trace-elsewhere' into... Junio C Hamano Tue, 31 May 2016 21:08:27 +0000 (14:08 -0700)

Merge branch 'jk/test-send-sh-x-trace-elsewhere' into maint

Running tests with '-x' option to trace the individual command
executions is a useful way to debug test scripts, but some tests
that capture the standard error stream and check what the command
said can be broken with the trace output mixed in. When running
our tests under "bash", however, we can redirect the trace output
to another file descriptor to keep the standard error of programs
being tested intact.

* jk/test-send-sh-x-trace-elsewhere:
test-lib: set BASH_XTRACEFD automatically

Merge branch 'js/name-rev-use-oldest-ref' into maintJunio C Hamano Tue, 31 May 2016 21:08:26 +0000 (14:08 -0700)

Merge branch 'js/name-rev-use-oldest-ref' into maint

"git describe --contains" often made a hard-to-justify choice of
tag to give name to a given commit, because it tried to come up
with a name with smallest number of hops from a tag, causing an old
commit whose close descendant that is recently tagged were not
described with respect to an old tag but with a newer tag. It did
not help that its computation of "hop" count was further tweaked to
penalize being on a side branch of a merge. The logic has been
updated to favor using the tag with the oldest tagger date, which
is a lot easier to explain to the end users: "We describe a commit
in terms of the (chronologically) oldest tag that contains the
commit."

* js/name-rev-use-oldest-ref:
name-rev: include taggerdate in considering the best name

Merge branch 'es/t1500-modernize'Junio C Hamano Tue, 31 May 2016 19:40:55 +0000 (12:40 -0700)

Merge branch 'es/t1500-modernize'

test updates to make it more readable and maintainable.

* es/t1500-modernize:
t1500: avoid setting environment variables outside of tests
t1500: avoid setting configuration options outside of tests
t1500: avoid changing working directory outside of tests
t1500: test_rev_parse: facilitate future test enhancements
t1500: be considerate to future potential tests

Merge branch 'jk/cat-file-buffered-batch-all'Junio C Hamano Tue, 31 May 2016 19:40:54 +0000 (12:40 -0700)

Merge branch 'jk/cat-file-buffered-batch-all'

"git cat-file --batch-all" has been sped up, by taking advantage
of the fact that it does not have to read a list of objects, in two
ways.

* jk/cat-file-buffered-batch-all:
cat-file: default to --buffer when --batch-all-objects is used
cat-file: avoid noop calls to sha1_object_info_extended

Merge branch 'fc/fast-import-broken-marks-file'Junio C Hamano Tue, 31 May 2016 19:40:53 +0000 (12:40 -0700)

Merge branch 'fc/fast-import-broken-marks-file'

"git fast-import --export-marks" would overwrite the existing marks
file even when it makes a dump from its custom die routine.
Prevent it from doing so when we have an import-marks file but
haven't finished reading it.

* fc/fast-import-broken-marks-file:
fast-import: do not truncate exported marks file

Final batch before 2.9-rc1Junio C Hamano Mon, 30 May 2016 01:08:26 +0000 (18:08 -0700)

Final batch before 2.9-rc1

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

Merge branch 'ak/t0008-ksh88-workaround'Junio C Hamano Mon, 30 May 2016 01:06:44 +0000 (18:06 -0700)

Merge branch 'ak/t0008-ksh88-workaround'

Test portability workaround.

* ak/t0008-ksh88-workaround:
t0008: 4 tests fail with ksh88

Merge branch 'js/t6044-use-test-seq'Junio C Hamano Mon, 30 May 2016 01:06:43 +0000 (18:06 -0700)

Merge branch 'js/t6044-use-test-seq'

Test portability fix.

* js/t6044-use-test-seq:
t6044: replace seq by test_seq

Merge branch 'ak/t4204-shell-portability'Junio C Hamano Mon, 30 May 2016 01:06:43 +0000 (18:06 -0700)

Merge branch 'ak/t4204-shell-portability'

Update a test to run also under ksh88.

* ak/t4204-shell-portability:
t4204: do not let $name variable clobbered

Merge branch 'rj/log-decorate-auto'Junio C Hamano Mon, 30 May 2016 01:06:42 +0000 (18:06 -0700)

Merge branch 'rj/log-decorate-auto'

We forgot to add "git log --decorate=auto" to documentation when we
added the feature back in v2.1.0 timeframe.

* rj/log-decorate-auto:
log: document the --decorate=auto option

Merge branch 'mr/send-email-doc-gmail-2fa'Junio C Hamano Mon, 30 May 2016 01:06:42 +0000 (18:06 -0700)

Merge branch 'mr/send-email-doc-gmail-2fa'

Give hints to GMail users with two-factor auth enabled that
they need app-specific-password when using send-email.

* mr/send-email-doc-gmail-2fa:
Documentation: add instructions to help setup gmail 2FA

Merge branch 'kb/msys2-tty'Junio C Hamano Mon, 30 May 2016 01:06:41 +0000 (18:06 -0700)

Merge branch 'kb/msys2-tty'

The "are we talking with TTY, doing an interactive session?"
detection has been updated to work better for "Git for Windows".

* kb/msys2-tty:
mingw: make isatty() recognize MSYS2's pseudo terminals (/dev/pty*)

Documentation: add instructions to help setup gmail 2FAMichael Rappazzo Fri, 27 May 2016 20:39:57 +0000 (16:39 -0400)

Documentation: add instructions to help setup gmail 2FA

For those who use two-factor authentication with gmail, git-send-email
will not work unless it is setup with an app-specific password. The
example for setting up git-send-email for use with gmail will now
include information on generating and storing the app-specific password.

Signed-off-by: Michael Rappazzo <rappazzo@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>

log: document the --decorate=auto optionRamsay Jones Fri, 27 May 2016 15:56:02 +0000 (16:56 +0100)

log: document the --decorate=auto option

Signed-off-by: Ramsay Jones <ramsay@ramsayjones.plus.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>

Sync with maintJunio C Hamano Thu, 26 May 2016 20:28:24 +0000 (13:28 -0700)

Sync with maint

* maint:
Start preparing for 2.8.4
archive-tar: convert snprintf to xsnprintf

Start preparing for 2.8.4Junio C Hamano Thu, 26 May 2016 20:21:00 +0000 (13:21 -0700)

Start preparing for 2.8.4

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

Merge branch 'jc/linkgit-fix' into maintJunio C Hamano Thu, 26 May 2016 20:17:26 +0000 (13:17 -0700)

Merge branch 'jc/linkgit-fix' into maint

Many 'linkgit:<git documentation page>' references were broken,
which are all fixed with this.

* jc/linkgit-fix:
Documentation: fix linkgit references

Merge branch 'ls/travis-build-doc' into maintJunio C Hamano Thu, 26 May 2016 20:17:25 +0000 (13:17 -0700)

Merge branch 'ls/travis-build-doc' into maint

CI test was taught to build documentation pages.

* ls/travis-build-doc:
travis-ci: build documentation

Merge branch 'jc/fsck-nul-in-commit' into maintJunio C Hamano Thu, 26 May 2016 20:17:24 +0000 (13:17 -0700)

Merge branch 'jc/fsck-nul-in-commit' into maint

"git fsck" learned to catch NUL byte in a commit object as
potential error and warn.

* jc/fsck-nul-in-commit:
fsck: detect and warn a commit with embedded NUL
fsck_commit_buffer(): do not special case the last validation

Merge branch 'jk/rebase-interative-eval-fix' into maintJunio C Hamano Thu, 26 May 2016 20:17:24 +0000 (13:17 -0700)

Merge branch 'jk/rebase-interative-eval-fix' into maint

Portability enhancement for "rebase -i" to help platforms whose
shell does not like "for i in <empty>" (which is not POSIX-kosher).

* jk/rebase-interative-eval-fix:
rebase--interactive: avoid empty list in shell for-loop

Merge branch 'js/windows-dotgit' into maintJunio C Hamano Thu, 26 May 2016 20:17:23 +0000 (13:17 -0700)

Merge branch 'js/windows-dotgit' into maint

On Windows, .git and optionally any files whose name starts with a
dot are now marked as hidden, with a core.hideDotFiles knob to
customize this behaviour.

* js/windows-dotgit:
mingw: remove unnecessary definition
mingw: introduce the 'core.hideDotFiles' setting

Merge branch 'kf/gpg-sig-verification-doc' into maintJunio C Hamano Thu, 26 May 2016 20:17:22 +0000 (13:17 -0700)

Merge branch 'kf/gpg-sig-verification-doc' into maint

Documentation for "git merge --verify-signatures" has been updated
to clarify that the signature of only the commit at the tip is
verified. Also the phrasing used for signature and key validity is
adjusted to align with that used by OpenPGP.

* kf/gpg-sig-verification-doc:
Documentation: clarify signature verification

Merge branch 'lp/typofixes' into maintJunio C Hamano Thu, 26 May 2016 20:17:21 +0000 (13:17 -0700)

Merge branch 'lp/typofixes' into maint

Typofixes.

* lp/typofixes:
typofix: assorted typofixes in comments, documentation and messages

Merge branch 'sb/z-is-gnutar-ism' into maintJunio C Hamano Thu, 26 May 2016 20:17:21 +0000 (13:17 -0700)

Merge branch 'sb/z-is-gnutar-ism' into maint

Test fix.

* sb/z-is-gnutar-ism:
t6041: do not compress backup tar file
t3513: do not compress backup tar file

Merge branch 'va/i18n-misc-updates' into maintJunio C Hamano Thu, 26 May 2016 20:17:20 +0000 (13:17 -0700)

Merge branch 'va/i18n-misc-updates' into maint

Mark several messages for translation.

* va/i18n-misc-updates:
i18n: unpack-trees: avoid substituting only a verb in sentences
i18n: builtin/pull.c: split strings marked for translation
i18n: builtin/pull.c: mark placeholders for translation
i18n: git-parse-remote.sh: mark strings for translation
i18n: branch: move comment for translators
i18n: branch: unmark string for translation
i18n: builtin/rm.c: remove a comma ',' from string
i18n: unpack-trees: mark strings for translation
i18n: builtin/branch.c: mark option for translation
i18n: index-pack: use plural string instead of normal one

Merge branch 'bn/config-doc-tt-varnames' into maintJunio C Hamano Thu, 26 May 2016 20:17:19 +0000 (13:17 -0700)

Merge branch 'bn/config-doc-tt-varnames' into maint

Doc formatting fixes.

* bn/config-doc-tt-varnames:
config: consistently format $variables in monospaced font
config: describe 'pathname' value type

Merge branch 'nd/remote-plural-ours-plus-theirs' into... Junio C Hamano Thu, 26 May 2016 20:17:18 +0000 (13:17 -0700)

Merge branch 'nd/remote-plural-ours-plus-theirs' into maint

Message fix.

* nd/remote-plural-ours-plus-theirs:
remote.c: specify correct plural form in "commit diverge" message

Merge branch 'ak/t4151-ls-files-could-be-empty' into... Junio C Hamano Thu, 26 May 2016 20:17:17 +0000 (13:17 -0700)

Merge branch 'ak/t4151-ls-files-could-be-empty' into maint

Test fix.

* ak/t4151-ls-files-could-be-empty:
t4151: make sure argument to 'test -z' is given

Merge branch 'jc/test-seq' into maintJunio C Hamano Thu, 26 May 2016 20:17:16 +0000 (13:17 -0700)

Merge branch 'jc/test-seq' into maint

Test fix.

* jc/test-seq:
test-lib-functions.sh: rewrite test_seq without Perl
test-lib-functions.sh: remove misleading comment on test_seq

Merge branch 'tb/t5601-sed-fix' into maintJunio C Hamano Thu, 26 May 2016 20:17:15 +0000 (13:17 -0700)

Merge branch 'tb/t5601-sed-fix' into maint

Test fix.

* tb/t5601-sed-fix:
t5601: Remove trailing space in sed expression

Merge branch 'va/i18n-remote-comment-to-align' into... Junio C Hamano Thu, 26 May 2016 20:17:14 +0000 (13:17 -0700)

Merge branch 'va/i18n-remote-comment-to-align' into maint

Message fix.

* va/i18n-remote-comment-to-align:
i18n: remote: add comment for translators

Merge branch 'va/mailinfo-doc-typofix' into maintJunio C Hamano Thu, 26 May 2016 20:17:13 +0000 (13:17 -0700)

Merge branch 'va/mailinfo-doc-typofix' into maint

Typofix.

* va/mailinfo-doc-typofix:
Documentation/git-mailinfo: fix typo

Merge branch 'maint-2.7' into maintJunio C Hamano Thu, 26 May 2016 20:16:51 +0000 (13:16 -0700)

Merge branch 'maint-2.7' into maint

* maint-2.7:
archive-tar: convert snprintf to xsnprintf

mingw: make isatty() recognize MSYS2's pseudo terminals... Karsten Blees Wed, 27 Apr 2016 15:16:37 +0000 (17:16 +0200)

mingw: make isatty() recognize MSYS2's pseudo terminals (/dev/pty*)

MSYS2 emulates pseudo terminals via named pipes, and isatty() returns 0
for such file descriptors. Therefore, some interactive functionality
(such as launching a pager, asking if a failed unlink should be repeated
etc.) doesn't work when run in a terminal emulator that uses MSYS2's
ptys (such as mintty).

However, MSYS2 uses special names for its pty pipes ('msys-*-pty*'),
which allows us to distinguish them from normal piped input / output.

On startup, check if stdin / stdout / stderr are connected to such pipes
using the NtQueryObject API from NTDll.dll. If the names match, adjust
the flags in MSVCRT's ioinfo structure accordingly.

Signed-off-by: Karsten Blees <blees@dcon.de>
Signed-off-by: Johannes Schindelin <johannes.schindelin@gmx.de>
Signed-off-by: Junio C Hamano <gitster@pobox.com>

Merge branch 'jk/war-on-sprintf' into maint-2.7Junio C Hamano Thu, 26 May 2016 17:45:37 +0000 (10:45 -0700)

Merge branch 'jk/war-on-sprintf' into maint-2.7

* jk/war-on-sprintf:
archive-tar: convert snprintf to xsnprintf

archive-tar: convert snprintf to xsnprintfJeff King Thu, 26 May 2016 04:28:08 +0000 (00:28 -0400)

archive-tar: convert snprintf to xsnprintf

Commit f2f0267 (archive-tar: use xsnprintf for trivial
formatting, 2015-09-24) converted cases of "sprintf" to
"xsnprintf", but accidentally left one as just "snprintf".
This meant that we could silently truncate the resulting
buffer instead of flagging an error.

In practice, this is impossible to achieve, as we are
formatting a ustar checksum, which can be at most 7
characters. But the point of xsnprintf is to document and
check for "should be impossible" conditions; this site was
just accidentally mis-converted during f2f0267.

Noticed-by: Paul Green <Paul.Green@stratus.com>
Signed-off-by: Jeff King <peff@peff.net>
Signed-off-by: Junio C Hamano <gitster@pobox.com>

t4204: do not let $name variable clobberedJunio C Hamano Mon, 23 May 2016 22:23:56 +0000 (15:23 -0700)

t4204: do not let $name variable clobbered

test_patch_id_file_order shell function uses $name variable to hold
one filename, and calls another shell function calc_patch_id as a
downstream of one pipeline. The called function, however, also uses
the same $name variable. With a shell implementation that runs the
callee in the current shell environment, the caller's $name would
be clobbered by the callee's use of the same variable.

This hasn't been an issue with dash and bash. ksh93 reveals the
breakage in the test script.

Fix it by using a distinct variable name in the callee.

Reported-by: Armin Kunaschik <megabreit@googlemail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>

Git 2.9-rc0 v2.9.0-rc0Junio C Hamano Mon, 23 May 2016 22:02:48 +0000 (15:02 -0700)

Git 2.9-rc0

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

Merge branch 'svn-travis' of git://bogomips.org/git-svnJunio C Hamano Mon, 23 May 2016 22:01:03 +0000 (15:01 -0700)

Merge branch 'svn-travis' of git://bogomips.org/git-svn

* 'svn-travis' of git://bogomips.org/git-svn:
travis-ci: enable Git SVN tests t91xx on Linux

Merge branch 'jc/rerere-multi'Junio C Hamano Mon, 23 May 2016 21:54:37 +0000 (14:54 -0700)

Merge branch 'jc/rerere-multi'

* jc/rerere-multi:
rerere: remove an null statement
rerere: plug memory leaks upon "rerere forget" failure

Merge branch 'da/difftool'Junio C Hamano Mon, 23 May 2016 21:54:36 +0000 (14:54 -0700)

Merge branch 'da/difftool'

"git difftool" learned to handle unmerged paths correctly in
dir-diff mode.

* da/difftool:
difftool: handle unmerged files in dir-diff mode
difftool: initialize variables for readability

Merge branch 'jk/test-z-n-unquoted'Junio C Hamano Mon, 23 May 2016 21:54:35 +0000 (14:54 -0700)

Merge branch 'jk/test-z-n-unquoted'

t9xxx series has been updated primarily for readability, while
fixing small bugs in it. A few scripted Porcelains have also been
updated to fix possible bugs around their use of "test -z" and
"test -n".

* jk/test-z-n-unquoted:
always quote shell arguments to test -z/-n
t9103: modernize test style
t9107: switch inverted single/double quotes in test
t9107: use "return 1" instead of "exit 1"
t9100,t3419: enclose all test code in single-quotes
t/lib-git-svn: drop $remote_git_svn and $git_svn_id

Merge branch 'ar/diff-args-osx-precompose'Junio C Hamano Mon, 23 May 2016 21:54:35 +0000 (14:54 -0700)

Merge branch 'ar/diff-args-osx-precompose'

Many commands normalize command line arguments from NFD to NFC
variant of UTF-8 on OSX, but commands in the "diff" family did
not, causing "git diff $path" to complain that no such path is
known to Git. They have been taught to do the normalization.

* ar/diff-args-osx-precompose:
diff: run arguments through precompose_argv

Merge branch 'jc/doc-lint'Junio C Hamano Mon, 23 May 2016 21:54:34 +0000 (14:54 -0700)

Merge branch 'jc/doc-lint'

Find common mistakes when writing gitlink: in our documentation and
drive the check from "make check-docs".

I am not entirely happy with the way the script chooses what input
file to validate, but it is not worse than not having anything, so
let's move it forward and have the logic improved later when people
care about it deeply.

* jc/doc-lint:
ci: validate "linkgit:" in documentation

Merge branch 'js/perf-rebase-i'Junio C Hamano Mon, 23 May 2016 21:54:33 +0000 (14:54 -0700)

Merge branch 'js/perf-rebase-i'

Add perf test for "rebase -i"

* js/perf-rebase-i:
perf: run "rebase -i" under perf
perf: make the tests work in worktrees
perf: let's disable symlinks when they are not available

Merge branch 'jc/test-parse-options-expect'Junio C Hamano Mon, 23 May 2016 21:54:32 +0000 (14:54 -0700)

Merge branch 'jc/test-parse-options-expect'

t0040 had too many unnecessary repetitions in its test data. Teach
test-parse-options program so that a caller can tell what it
expects in its output, so that these repetitions can be cleaned up.

* jc/test-parse-options-expect:
t0040: convert a few tests to use test-parse-options --expect
t0040: remove unused test helpers
test-parse-options: --expect=<string> option to simplify tests
test-parse-options: fix output when callback option fails

Merge branch 'pb/commit-verbose-config'Junio C Hamano Mon, 23 May 2016 21:54:31 +0000 (14:54 -0700)

Merge branch 'pb/commit-verbose-config'

"git commit" learned to pay attention to "commit.verbose"
configuration variable and act as if "--verbose" option was
given from the command line.

* pb/commit-verbose-config:
commit: add a commit.verbose config variable
t7507-commit-verbose: improve test coverage by testing number of diffs
parse-options.c: make OPTION_COUNTUP respect "unspecified" values
t/t7507: improve test coverage
t0040-parse-options: improve test coverage
test-parse-options: print quiet as integer
t0040-test-parse-options.sh: fix style issues

Merge branch 'xy/format-patch-base'Junio C Hamano Mon, 23 May 2016 21:54:31 +0000 (14:54 -0700)

Merge branch 'xy/format-patch-base'

"git format-patch" learned a new "--base" option to record what
(public, well-known) commit the original series was built on in
its output.

* xy/format-patch-base:
format-patch: introduce format.useAutoBase configuration
format-patch: introduce --base=auto option
format-patch: add '--base' option to record base tree info
patch-ids: make commit_patch_id() a public helper function

Merge branch 'tb/core-eol-fix'Junio C Hamano Mon, 23 May 2016 21:54:30 +0000 (14:54 -0700)

Merge branch 'tb/core-eol-fix'

A couple of bugs around core.autocrlf have been fixed.

* tb/core-eol-fix:
convert.c: ident + core.autocrlf didn't work
t0027: test cases for combined attributes
convert: allow core.autocrlf=input and core.eol=crlf
t0027: make commit_chk_wrnNNO() reliable

Merge branch 'nd/worktree-various-heads'Junio C Hamano Mon, 23 May 2016 21:54:29 +0000 (14:54 -0700)

Merge branch 'nd/worktree-various-heads'

The experimental "multiple worktree" feature gains more safety to
forbid operations on a branch that is checked out or being actively
worked on elsewhere, by noticing that e.g. it is being rebased.

* nd/worktree-various-heads:
branch: do not rename a branch under bisect or rebase
worktree.c: check whether branch is bisected in another worktree
wt-status.c: split bisect detection out of wt_status_get_state()
worktree.c: check whether branch is rebased in another worktree
worktree.c: avoid referencing to worktrees[i] multiple times
wt-status.c: make wt_status_check_rebase() work on any worktree
wt-status.c: split rebase detection out of wt_status_get_state()
path.c: refactor and add worktree_git_path()
worktree.c: mark current worktree
worktree.c: make find_shared_symref() return struct worktree *
worktree.c: store "id" instead of "git_dir"
path.c: add git_common_path() and strbuf_git_common_path()
dir.c: rename str(n)cmp_icase to fspath(n)cmp

Merge branch 'ss/commit-dry-run-resolve-merge-to-no-op'Junio C Hamano Mon, 23 May 2016 21:54:28 +0000 (14:54 -0700)

Merge branch 'ss/commit-dry-run-resolve-merge-to-no-op'

"git commit --dry-run" reported "No, no, you cannot commit." in one
case where "git commit" would have allowed you to commit, and this
improves it a little bit ("git commit --dry-run --short" still does
not give you the correct answer, for example). This is a stop-gap
measure in that "commit --short --dry-run" still gives an incorrect
result.

* ss/commit-dry-run-resolve-merge-to-no-op:
wt-status.c: set commitable bit if there is a meaningful merge.

travis-ci: enable Git SVN tests t91xx on LinuxLars Schneider Thu, 19 May 2016 09:10:08 +0000 (11:10 +0200)

travis-ci: enable Git SVN tests t91xx on Linux

Install the "git-svn" package to make the Perl SVN libraries available
to the Git SVN tests on Travis-CI Linux build machines.

Signed-off-by: Lars Schneider <larsxschneider@gmail.com>
Signed-off-by: Eric Wong <e@80x24.org>

t0008: 4 tests fail with ksh88Armin Kunaschik Fri, 20 May 2016 14:31:30 +0000 (16:31 +0200)

t0008: 4 tests fail with ksh88

In t0008, we have

cat <<-EOF
...
a/b/.gitignore:8:!on* "a/b/one\"three"
...
EOF

and expect that the backslash-dq is passed through literally.

ksh88 eats the backslash and produces a wrong expect file to
compare the actual output with.

Using \\" works this around without breaking other POSIX shells
(which collapse backslash-backslash to a single backslash), and
ksh88 does so, too.

It makes it easier to read, too, because the reason why we are
writing backslash there is *not* because we think dq is special and
want to quote it (if that were the case we would have two more
backslashes on that line). It is simply because we want a single
literal backslash there. Since backslash is treated specially in
unquoted here-document, explicitly doubling it to quote it expresses
our intent better than relying on the character that immediately
comes after it (i.e. '"') not being a special character.

Signed-off-by: Armin Kunaschik <megabreit@googlemail.com>
Acked-by: Jeff King <peff@peff.net>
Signed-off-by: Junio C Hamano <gitster@pobox.com>

rerere: remove an null statementJunio C Hamano Thu, 19 May 2016 19:51:22 +0000 (12:51 -0700)

rerere: remove an null statement

J6t spotted that previous commit added an empty statement by
mistake.

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

Sync with 2.8.3Junio C Hamano Wed, 18 May 2016 22:33:57 +0000 (15:33 -0700)

Sync with 2.8.3

* maint:
Git 2.8.3

Git 2.8.3 v2.8.3Junio C Hamano Wed, 18 May 2016 21:45:08 +0000 (14:45 -0700)

Git 2.8.3

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

Merge branch 'jk/push-client-deadlock-fix'Junio C Hamano Wed, 18 May 2016 22:11:46 +0000 (15:11 -0700)

Merge branch 'jk/push-client-deadlock-fix'

Some Windows SDK lacks pthread_sigmask() implementation and fails
to compile the recently updated "git push" codepath that uses it.

* jk/push-client-deadlock-fix:
Windows: only add a no-op pthread_sigmask() when needed
Windows: add pthread_sigmask() that does nothing

Merge branch 'sb/misc-cleanups' into HEADJunio C Hamano Wed, 18 May 2016 21:40:15 +0000 (14:40 -0700)

Merge branch 'sb/misc-cleanups' into HEAD

* sb/misc-cleanups:
submodule-config: don't shadow `cache`
config.c: drop local variable
credential-cache, send_request: close fd when done
bundle: don't leak an fd in case of early return
abbrev_sha1_in_line: don't leak memory
notes: don't leak memory in git_config_get_notes_strategy

Merge branch 'ew/doc-split-pack-disables-bitmap' into... Junio C Hamano Wed, 18 May 2016 21:40:15 +0000 (14:40 -0700)

Merge branch 'ew/doc-split-pack-disables-bitmap' into HEAD

Doc update.

* ew/doc-split-pack-disables-bitmap:
pack-objects: warn on split packs disabling bitmaps

Merge branch 'sb/clean-test-fix' into HEADJunio C Hamano Wed, 18 May 2016 21:40:14 +0000 (14:40 -0700)

Merge branch 'sb/clean-test-fix' into HEAD

* sb/clean-test-fix:
t7300: mark test with SANITY

Merge branch 'rn/glossary-typofix' into HEADJunio C Hamano Wed, 18 May 2016 21:40:13 +0000 (14:40 -0700)

Merge branch 'rn/glossary-typofix' into HEAD

* rn/glossary-typofix:
Documentation: fix typo 'In such these cases'

Merge branch 'ew/normal-to-e' into HEADJunio C Hamano Wed, 18 May 2016 21:40:12 +0000 (14:40 -0700)

Merge branch 'ew/normal-to-e' into HEAD

* ew/normal-to-e:
.mailmap: update to my shorter email address

Merge branch 'sb/config-exit-status-list' into HEADJunio C Hamano Wed, 18 May 2016 21:40:12 +0000 (14:40 -0700)

Merge branch 'sb/config-exit-status-list' into HEAD

Doc update.

* sb/config-exit-status-list:
config doc: improve exit code listing

Merge branch 'rt/string-list-lookup-cleanup' into HEADJunio C Hamano Wed, 18 May 2016 21:40:12 +0000 (14:40 -0700)

Merge branch 'rt/string-list-lookup-cleanup' into HEAD

Code cleanup.

* rt/string-list-lookup-cleanup:
string_list: use string-list API in unsorted_string_list_lookup()

Merge branch 'jk/fix-attribute-macro-in-2.5' into HEADJunio C Hamano Wed, 18 May 2016 21:40:12 +0000 (14:40 -0700)

Merge branch 'jk/fix-attribute-macro-in-2.5' into HEAD

Code fixup.

* jk/fix-attribute-macro-in-2.5:
remote.c: spell __attribute__ correctly

Merge branch 'sg/test-lib-simplify-expr-away' into... Junio C Hamano Wed, 18 May 2016 21:40:11 +0000 (14:40 -0700)

Merge branch 'sg/test-lib-simplify-expr-away' into HEAD

Code cleanup.

* sg/test-lib-simplify-expr-away:
test-lib: simplify '--option=value' parsing

Merge branch 'nd/remove-unused' into HEADJunio C Hamano Wed, 18 May 2016 21:40:11 +0000 (14:40 -0700)

Merge branch 'nd/remove-unused' into HEAD

Code cleanup.

* nd/remove-unused:
wrapper.c: delete dead function git_mkstemps()
dir.c: remove dead function fnmatch_icase()

Merge branch 'sk/gitweb-highlight-encoding' into HEADJunio C Hamano Wed, 18 May 2016 21:40:10 +0000 (14:40 -0700)

Merge branch 'sk/gitweb-highlight-encoding' into HEAD

Some multi-byte encoding can have a backslash byte as a later part
of one letter, which would confuse "highlight" filter used in
gitweb.

* sk/gitweb-highlight-encoding:
gitweb: apply fallback encoding before highlight

Merge branch 'ls/travis-submitting-patches' into HEADJunio C Hamano Wed, 18 May 2016 21:40:09 +0000 (14:40 -0700)

Merge branch 'ls/travis-submitting-patches' into HEAD

* ls/travis-submitting-patches:
Documentation: add setup instructions for Travis CI

Merge branch 'js/close-packs-before-gc' into HEADJunio C Hamano Wed, 18 May 2016 21:40:09 +0000 (14:40 -0700)

Merge branch 'js/close-packs-before-gc' into HEAD

* js/close-packs-before-gc:
t5510: run auto-gc in the foreground

Merge branch 'ls/p4-lfs' into HEADJunio C Hamano Wed, 18 May 2016 21:40:08 +0000 (14:40 -0700)

Merge branch 'ls/p4-lfs' into HEAD

Recent update to Git LFS broke "git p4" by changing the output from
its "lfs pointer" subcommand.

* ls/p4-lfs:
git-p4: fix Git LFS pointer parsing
travis-ci: express Linux/OS X dependency versions more clearly
travis-ci: update Git-LFS and P4 to the latest version

Merge branch 'ls/p4-lfs-test-fix-2.7.0' into HEADJunio C Hamano Wed, 18 May 2016 21:40:08 +0000 (14:40 -0700)

Merge branch 'ls/p4-lfs-test-fix-2.7.0' into HEAD

Fix a broken test.

* ls/p4-lfs-test-fix-2.7.0:
t9824: fix wrong reference value
t9824: fix broken &&-chain in a subshell

Merge branch 'nf/mergetool-prompt' into HEADJunio C Hamano Wed, 18 May 2016 21:40:07 +0000 (14:40 -0700)

Merge branch 'nf/mergetool-prompt' into HEAD

UI consistency improvements.

* nf/mergetool-prompt:
difftool/mergetool: make the form of yes/no questions consistent

Merge branch 'jd/send-email-to-whom' into HEADJunio C Hamano Wed, 18 May 2016 21:40:07 +0000 (14:40 -0700)

Merge branch 'jd/send-email-to-whom' into HEAD

A question by "git send-email" to ask the identity of the sender
has been updated.

* jd/send-email-to-whom:
send-email: fix grammo in the prompt that asks e-mail recipients

Merge branch 'js/win32-mmap' into HEADJunio C Hamano Wed, 18 May 2016 21:40:06 +0000 (14:40 -0700)

Merge branch 'js/win32-mmap' into HEAD

mmap emulation on Windows has been optimized and work better without
consuming paging store when not needed.

* js/win32-mmap:
mmap(win32): avoid expensive fstat() call
mmap(win32): avoid copy-on-write when it is unnecessary
win32mmap: set errno appropriately

Merge branch 'jk/push-client-deadlock-fix' into HEADJunio C Hamano Wed, 18 May 2016 21:40:06 +0000 (14:40 -0700)

Merge branch 'jk/push-client-deadlock-fix' into HEAD

Some Windows SDK lacks pthread_sigmask() implementation and fails
to compile the recently updated "git push" codepath that uses it.

* jk/push-client-deadlock-fix:
Windows: only add a no-op pthread_sigmask() when needed
Windows: add pthread_sigmask() that does nothing
t5504: drop sigpipe=ok from push tests
fetch-pack: isolate sigpipe in demuxer thread
send-pack: isolate sigpipe in demuxer thread
run-command: teach async threads to ignore SIGPIPE
send-pack: close demux pipe before finishing async process

Merge branch 'sb/mv-submodule-fix' into HEADJunio C Hamano Wed, 18 May 2016 21:40:05 +0000 (14:40 -0700)

Merge branch 'sb/mv-submodule-fix' into HEAD

"git mv old new" did not adjust the path for a submodule that lives
as a subdirectory inside old/ directory correctly.

* sb/mv-submodule-fix:
mv: allow moving nested submodules

Merge branch 'da/user-useconfigonly' into HEADJunio C Hamano Wed, 18 May 2016 21:40:05 +0000 (14:40 -0700)

Merge branch 'da/user-useconfigonly' into HEAD

The "user.useConfigOnly" configuration variable makes it an error
if users do not explicitly set user.name and user.email. However,
its check was not done early enough and allowed another error to
trigger, reporting that the default value we guessed from the
system setting was unusable. This was a suboptimal end-user
experience as we want the users to set user.name/user.email without
relying on the auto-detection at all.

* da/user-useconfigonly:
ident: give "please tell me" message upon useConfigOnly error
ident: check for useConfigOnly before auto-detection of name/email

Merge branch 'ld/p4-test-py3' into HEADJunio C Hamano Wed, 18 May 2016 21:40:04 +0000 (14:40 -0700)

Merge branch 'ld/p4-test-py3' into HEAD

The test scripts for "git p4" (but not "git p4" implementation
itself) has been updated so that they would work even on a system
where the installed version of Python is python 3.

* ld/p4-test-py3:
git-p4 tests: time_in_seconds should use $PYTHON_PATH
git-p4 tests: work with python3 as well as python2
git-p4 tests: cd to / before running python

cat-file: default to --buffer when --batch-all-objects... Jeff King Wed, 18 May 2016 16:56:14 +0000 (12:56 -0400)

cat-file: default to --buffer when --batch-all-objects is used

Traditionally cat-file's batch-mode does not do any output
buffering. The reason is that a caller may have pipes
connected to its input and output, and would want to use
cat-file interactively, getting output immediately for each
input it sends.

This may involve a lot of small write() calls, which can be
slow. So we introduced --buffer to improve this, but we
can't turn it on by default, as it would break the
interactive case above.

However, when --batch-all-objects is used, we do not read
stdin at all. We generate the output ourselves as quickly as
possible, and then exit. In this case buffering is a strict
win, and it is simply a hassle for the user to have to
remember to specify --buffer.

This patch makes --buffer the default when --batch-all-objects
is used. Specifying "--buffer" manually is still OK, and you
can even override it with "--no-buffer" if you're a
masochist (or debugging).

For some real numbers, running:

git cat-file --batch-all-objects --batch-check='%(objectname)'

on torvalds/linux goes from:

real 0m1.464s
user 0m1.208s
sys 0m0.252s

to:

real 0m1.230s
user 0m1.172s
sys 0m0.056s

for a 16% speedup.

Suggested-by: Charles Bailey <charles@hashpling.org>
Signed-off-by: Jeff King <peff@peff.net>
Signed-off-by: Junio C Hamano <gitster@pobox.com>

cat-file: avoid noop calls to sha1_object_info_extendedJeff King Wed, 18 May 2016 16:55:23 +0000 (12:55 -0400)

cat-file: avoid noop calls to sha1_object_info_extended

It is not unreasonable to ask cat-file for a batch-check
format of simply "%(objectname)". At first glance this seems
like a noop (you are generally already feeding the object
names on stdin!), but it has a few uses:

1. With --batch-all-objects, you can generate a listing of
the sha1s present in the repository, without any input.

2. You do not have to feed sha1s; you can feed arbitrary
sha1 expressions and have git resolve them en masse.

3. You can even feed a raw sha1, with the result that git
will tell you whether we actually have the object or
not.

In case 3, the call to sha1_object_info is useful; it tells
us whether the object exists or not (technically we could
swap this out for has_sha1_file, but the cost is roughly the
same).

In case 2, the existence check is of debatable value. A
mass-resolution might prefer performance to safety (against
outputting a value for a corrupted ref, for example).
However, the object lookup cost is likely not as noticeable
compared to the resolution cost. And since we have provided
that safety in the past, the conservative choice is to keep
it.

In case 1, though, the object lookup is a definite noop; we
know about the object because we found it in the object
database. There is no new information gained by making the
call.

This patch detects that case and optimizes out the call.
Here are best-of-five timings for linux.git:

[before]
$ time git cat-file --buffer \
--batch-all-objects \
--batch-check='%(objectname)'
real 0m2.117s
user 0m2.044s
sys 0m0.072s

[after]
$ time git cat-file --buffer \
--batch-all-objects \
--batch-check='%(objectname)'
real 0m1.230s
user 0m1.176s
sys 0m0.052s

There are two implementation details to note here.

One is that we detect the noop case by seeing that "struct
object_info" does not request any information. But besides
object existence, there is one other piece of information
which sha1_object_info may fill in: whether the object is
cached, loose, or packed. We don't currently provide that
information in the output, but if we were to do so later,
we'd need to take note and disable the optimization in that
case.

And that leads to the second note. If we were to output
that information, a better implementation would be to
remember where we saw the object in --batch-all-objects in
the first place, and avoid looking it up again by sha1.

In fact, we could probably squeeze out some extra
performance for less-trivial cases, too, by remembering the
pack location where we saw the object, and going directly
there to find its information (like type, size, etc). That
would in theory make this optimization unnecessary.

I didn't pursue that path here for two reasons:

1. It's non-trivial to implement, and has memory
implications. Because we sort and de-dup the list of
output sha1s, we'd have to record the pack information
for each object, too.

2. It doesn't save as much as you might hope. It saves the
find_pack_entry() call, but getting the size and type
for deltified objects requires walking down the delta
chain (for the real type) or reading the delta data
header (for the size). These costs tend to dominate the
non-trivial cases.

By contrast, this optimization is easy and self-contained,
and speeds up a real-world case I've used.

Signed-off-by: Jeff King <peff@peff.net>
Signed-off-by: Junio C Hamano <gitster@pobox.com>

t1500: avoid setting environment variables outside... Eric Sunshine Wed, 18 May 2016 20:15:45 +0000 (16:15 -0400)

t1500: avoid setting environment variables outside of tests

Ideally, each test should be responsible for setting up state it needs
rather than relying upon transient global state. Toward this end, teach
test_rev_parse() to accept a "-g <dir>" option to allow callers to
specify the value of the GIT_DIR environment variable explicitly. Take
advantage of this new option to avoid polluting the global scope with
GIT_DIR assignments.

Implementation note: Typically, tests avoid polluting the global state
by wrapping transient environment variable assignments within a
subshell, however, this technique doesn't work here since test_config()
and test_unconfig() need to know GIT_DIR, as well, but neither function
can be used within a subshell. Consequently, GIT_DIR is instead cleared
manually via test_when_finished().

Signed-off-by: Eric Sunshine <sunshine@sunshineco.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>

t1500: avoid setting configuration options outside... Eric Sunshine Wed, 18 May 2016 20:15:44 +0000 (16:15 -0400)

t1500: avoid setting configuration options outside of tests

Ideally, each test should be responsible for setting up state it needs
rather than relying upon transient global state. Toward this end, teach
test_rev_parse() to accept a "-b <value>" option to allow callers to set
"core.bare" explicitly or undefine it. Take advantage of this new option
to avoid setting "core.bare" outside of tests.

Under the hood, "-b <value>" invokes "test_config -C <dir>" (or
"test_unconfig -C <dir>"), thus git-config knows explicitly where to
find its configuration file. Consequently, the global GIT_CONFIG
environment variable required by the manual git-config invocations
outside of tests is no longer needed, and is thus dropped.

Signed-off-by: Eric Sunshine <sunshine@sunshineco.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>

t1500: avoid changing working directory outside of... Eric Sunshine Wed, 18 May 2016 20:15:43 +0000 (16:15 -0400)

t1500: avoid changing working directory outside of tests

Ideally, each test should be responsible for setting up state it needs
rather than relying upon transient global state. Toward this end, teach
test_rev_parse() to accept a "-C <dir>" option to allow callers to
instruct it explicitly in which directory its tests should be run. Take
advantage of this new option to avoid changing the working directory
outside of tests.

Implementation note: test_rev_parse() passes "-C <dir>" along to
git-rev-parse with <dir> properly quoted. The natural and POSIX way to
do so is via ${dir:+-C "$dir"}, however, with some older broken shells,
this expression evaluates incorrectly to a single argument ("-C <dir>")
rather than the expected two (-C and "<dir>"). Work around this problem
with the slightly ungainly expression: ${dir:+-C} ${dir:+"$dir"}

Signed-off-by: Eric Sunshine <sunshine@sunshineco.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>