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Genki Sky a6c612b528 rebase: add --allow-empty-message option
This option allows commits with empty commit messages to be rebased,
matching the same option in git-commit and git-cherry-pick. While empty
log messages are frowned upon, sometimes one finds them in older
repositories (e.g. translated from another VCS [0]), or have other
reasons for desiring them. The option is available in git-commit and
git-cherry-pick, so it is natural to make other git tools play nicely
with them. Adding this as an option allows the default to be "give the
user a chance to fix", while not interrupting the user's workflow
otherwise [1].

  [0]: https://stackoverflow.com/q/8542304
  [1]: https://public-inbox.org/git/7vd33afqjh.fsf@alter.siamese.dyndns.org/

To implement this, add a new --allow-empty-message flag. Then propagate
it to all calls of 'git commit', 'git cherry-pick', and 'git rebase--helper'
within the rebase scripts.

Signed-off-by: Genki Sky <sky@genki.is>
Reviewed-by: Johannes Schindelin <Johannes.Schindelin@gmx.de>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2018-02-07 11:26:46 -08:00
Lucas Werkmeister 0c591cacba daemon: add --log-destination=(stderr|syslog|none)
This new option can be used to override the implicit --syslog of
--inetd, or to disable all logging. (While --detach also implies
--syslog, --log-destination=stderr with --detach is useless since
--detach disassociates the process from the original stderr.) --syslog
is retained as an alias for --log-destination=syslog.

--log-destination always overrides implicit --syslog regardless of
option order. This is different than the “last one wins” logic that
applies to some implicit options elsewhere in Git, but should hopefully
be less confusing. (I also don’t know if *all* implicit options in Git
follow “last one wins”.)

The combination of --inetd with --log-destination=stderr is useful, for
instance, when running `git daemon` as an instanced systemd service
(with associated socket unit). In this case, log messages sent via
syslog are received by the journal daemon, but run the risk of being
processed at a time when the `git daemon` process has already exited
(especially if the process was very short-lived, e.g. due to client
error), so that the journal daemon can no longer read its cgroup and
attach the message to the correct systemd unit (see systemd/systemd#2913
[1]). Logging to stderr instead can solve this problem, because systemd
can connect stderr directly to the journal daemon, which then already
knows which unit is associated with this stream.

[1]: https://github.com/systemd/systemd/issues/2913

Helped-by: Ævar Arnfjörð Bjarmason <avarab@gmail.com>
Helped-by: Junio C Hamano <gitster@pobox.com>
Helped-by: Eric Sunshine <sunshine@sunshineco.com>
Signed-off-by: Lucas Werkmeister <mail@lucaswerkmeister.de>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2018-02-05 10:30:44 -08:00
René Scharfe ae239fc8e5 cocci: simplify check for trivial format strings
353d84c537 (coccicheck: make transformation for strbuf_addf(sb, "...")
more precise) added a check to avoid transforming calls with format
strings which contain percent signs, as that would change the result.
It uses embedded Python code for that.  Simplify this rule by using the
regular expression matching operator instead.

Signed-off-by: Rene Scharfe <l.s.r@web.de>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2018-02-02 14:30:12 -08:00
Thomas Gummerer 1cf823fb68 reset --hard: make use of the pretty machinery
reset --hard currently uses its own logic for printing the first line of
the commit message in its output.  Instead of just using the first line,
use the pretty machinery to create the output.

In addition to the easier to follow code, this makes the output more
consistent with other commands that print the title of the commit, such
as 'git commit --oneline' or 'git checkout', which both use
'pp_commit_easy()' with the CMIT_FMT_ONELINE modifier.

It is a slight change of the output if the second line of the commit
message is not a blank line, i.e. if the commit message is

    foo
    bar

previously we would print "HEAD is now at 000000 foo", while after
this change we print "HEAD is now at 000000 foo bar", same as 'git log
--oneline' shows "000000 foo bar".

So this does make the output more consistent with other commands, and
'reset' is a porcelain command, so nobody should be parsing the output
in scripts.

The current behaviour dates back to 0e5a7faa3a ("Make "git reset" a
builtin.", 2007-09-11), so I assume (without digging into the old
codebase too much) that the logic was implemented because there was
no convenience function such as 'pp_commit_easy' that would do this
already.

Signed-off-by: Thomas Gummerer <t.gummerer@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2018-02-02 12:17:51 -08:00
Christian Couder ed103edfea perf/aggregate: sort JSON fields in output
It is much easier to diff the output against a previous
one when the fields are sorted.

Helped-by: Philip Oakley <philipoakley@iee.org>
Signed-off-by: Christian Couder <chriscool@tuxfamily.org>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2018-02-02 11:47:45 -08:00
Christian Couder fb2c362eb5 perf/aggregate: add --reponame option
This makes it easier to use the aggregate script
on the command line when one wants to get the
"environment" fields set in the codespeed output.

Previously setting GIT_REPO_NAME was needed
for this purpose.

Helped-by: Eric Sunshine <sunshine@sunshineco.com>
Signed-off-by: Christian Couder <chriscool@tuxfamily.org>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2018-02-02 11:47:41 -08:00
Christian Couder cd5d4bf609 perf/aggregate: add --subsection option
This makes it easier to use the aggregate script
on the command line, to get results from
subsections.

Previously setting GIT_PERF_SUBSECTION was needed
for this purpose.

Signed-off-by: Christian Couder <chriscool@tuxfamily.org>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2018-02-02 11:47:37 -08:00
brian m. carlson f87e813718 bulk-checkin: abstract SHA-1 usage
Convert uses of the direct SHA-1 functions to use the_hash_algo instead.

Signed-off-by: brian m. carlson <sandals@crustytoothpaste.net>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2018-02-02 11:28:41 -08:00
brian m. carlson 4d2735005a csum-file: abstract uses of SHA-1
Convert several direct uses of SHA-1 to use the_hash_algo instead.
Convert one use of the constant 20 as well.

Signed-off-by: brian m. carlson <sandals@crustytoothpaste.net>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2018-02-02 11:28:41 -08:00
brian m. carlson 98a3beab6a csum-file: rename sha1file to hashfile
Rename struct sha1file to struct hashfile, along with all of its related
functions.

The transformation in this commit was made by global search-and-replace.

Signed-off-by: Junio C Hamano <gitster@pobox.com>
2018-02-02 11:28:41 -08:00
brian m. carlson aab6135906 read-cache: abstract away uses of SHA-1
Convert various uses of direct calls to SHA-1 and 20- and 40-based
constants to use the_hash_algo instead.  Don't yet convert the on-disk
data structures, which will be handled in a future commit.

Adjust some comments so as not to refer explicitly to SHA-1.

Signed-off-by: brian m. carlson <sandals@crustytoothpaste.net>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2018-02-02 11:28:41 -08:00
brian m. carlson 81c58cd452 pack-write: switch various SHA-1 values to abstract forms
Convert various uses of hardcoded 20- and 40-based numbers to use
the_hash_algo, along with direct calls to SHA-1.  Adjust the names of
variables to refer to "hash" instead of "sha1".

Signed-off-by: brian m. carlson <sandals@crustytoothpaste.net>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2018-02-02 11:28:41 -08:00
brian m. carlson ccc12e0676 pack-check: convert various uses of SHA-1 to abstract forms
Convert various explicit calls to use SHA-1 functions and constants to
references to the_hash_algo.  Make several strings more generic with
respect to the hash algorithm used.

Signed-off-by: brian m. carlson <sandals@crustytoothpaste.net>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2018-02-02 11:28:41 -08:00
brian m. carlson 7f89428d37 fast-import: switch various uses of SHA-1 to the_hash_algo
Switch various uses of explicit calls to SHA-1 to use the_hash_algo.
Convert various uses of 20 and the GIT_SHA1 constants as well.

Signed-off-by: brian m. carlson <sandals@crustytoothpaste.net>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2018-02-02 11:28:41 -08:00
brian m. carlson 18e2588e11 sha1_file: switch uses of SHA-1 to the_hash_algo
Switch various uses of explicit calls to SHA-1 into references to
the_hash_algo for better abstraction.  Convert some calls to use struct
object_id.

Signed-off-by: brian m. carlson <sandals@crustytoothpaste.net>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2018-02-02 11:28:41 -08:00
brian m. carlson 3206b6bdf6 builtin/unpack-objects: switch uses of SHA-1 to the_hash_algo
Switch various uses of explicit calls to SHA-1 into references to
the_hash_algo to better abstract away the various uses of it.

Signed-off-by: brian m. carlson <sandals@crustytoothpaste.net>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2018-02-02 11:28:41 -08:00
brian m. carlson 454253f059 builtin/index-pack: improve hash function abstraction
Convert several uses of unsigned char [20] to struct object_id and
convert various hard-coded constants and uses of SHA-1 functions to use
the_hash_algo.

Signed-off-by: brian m. carlson <sandals@crustytoothpaste.net>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2018-02-02 11:28:41 -08:00
brian m. carlson ac73cedff0 hash: create union for hash context allocation
In various parts of our code, we want to allocate a structure
representing the internal state of a hash algorithm.  The original
implementation of the hash algorithm abstraction assumed we would do
that using heap allocations, and added a context size element to struct
git_hash_algo.  However, most of the existing code uses stack
allocations and conversion would needlessly complicate various parts of
the code.  Add a union for the purpose of allocating hash contexts on
the stack and a typedef for ease of use.  Use this union for defining
the init, update, and final functions to avoid casts.  Remove the ctxsz
element for struct git_hash_algo, which is no longer very useful.

This does mean that stack allocations will grow slightly as additional
hash functions are added, but this should not be a significant problem,
since we don't allocate many hash contexts.  The improved usability and
benefits from avoiding dynamic allocation outweigh this small downside.

Signed-off-by: brian m. carlson <sandals@crustytoothpaste.net>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2018-02-02 11:28:41 -08:00
brian m. carlson 164e716330 hash: move SHA-1 macros to hash.h
Most of the other code dealing with SHA-1 and other hashes is located in
hash.h, which is in turn loaded by cache.h.  Move the SHA-1 macros to
hash.h as well, so we can use them in additional hash-related items in
the future.

Signed-off-by: brian m. carlson <sandals@crustytoothpaste.net>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2018-02-02 11:28:40 -08:00
Nguyễn Thái Ngọc Duy ca54d9baa4 trace: measure where the time is spent in the index-heavy operations
All the known heavy code blocks are measured (except object database
access). This should help identify if an optimization is effective or
not. An unoptimized git-status would give something like below:

    0.001791141 s: read cache ...
    0.004011363 s: preload index
    0.000516161 s: refresh index
    0.003139257 s: git command: ... 'status' '--porcelain=2'
    0.006788129 s: diff-files
    0.002090267 s: diff-index
    0.001885735 s: initialize name hash
    0.032013138 s: read directory
    0.051781209 s: git command: './git' 'status'

Signed-off-by: Nguyễn Thái Ngọc Duy <pclouds@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2018-02-02 11:20:16 -08:00
Duy Nguyen 2e22a85e5c gitignore.txt: elaborate shell glob syntax
`fnmatch(3)` is a great mention if the intended audience is
programmers. For normal users it's probably better to spell out what
a shell glob is.

This paragraph is updated to roughly tell (or remind) what the main
wildcards are supposed to do. All the details are still hidden away
behind the `fnmatch(3)` wall because bringing the whole specification
here may be too much.

Signed-off-by: Nguyễn Thái Ngọc Duy <pclouds@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2018-02-02 10:56:46 -08:00
Nguyễn Thái Ngọc Duy 071dd0ba43 format-patch: reduce patch diffstat width to 72
Patches generated by format-patch are meant to be exchanged as emails,
most of the time. And since it's generally agreed that text in mails
should be wrapped around 70 columns or so, make sure these diffstat
follow the convention (especially when used with --cover-letter since we
already defaults to wrapping 72 columns). The default can still be
overriden with command line options.

Signed-off-by: Nguyễn Thái Ngọc Duy <pclouds@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2018-02-02 10:40:34 -08:00
Nguyễn Thái Ngọc Duy b673155074 dir.c: stop ignoring opendir() error in open_cached_dir()
A follow-up to the recently fixed bugs in the untracked
invalidation. If opendir() fails it should show a warning, perhaps
this should die, but if this ever happens the error is probably
recoverable for the user, and dying would just make things worse.

Signed-off-by: Nguyễn Thái Ngọc Duy <pclouds@gmail.com>
Signed-off-by: Ævar Arnfjörð Bjarmason <avarab@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2018-02-02 10:16:23 -08:00
Ævar Arnfjörð Bjarmason 8725923b85 wildmatch test: mark test as EXPENSIVE_ON_WINDOWS
Mark the newly added test which creates test files on-disk as
EXPENSIVE_ON_WINDOWS. According to [1] it takes almost ten minutes to
run this test file on Windows after this recent change, but just a few
seconds on Linux as noted in my [2].

This could be done faster by exiting earlier, however by using this
pattern we'll emit "skip" lines for each skipped test, making it clear
we're not running a lot of them in the TAP output, at the cost of some
overhead.

1. nycvar.QRO.7.76.6.1801061337020.1337@wbunaarf-fpuvaqryva.tvgsbejvaqbjf.bet
   (https://public-inbox.org/git/nycvar.QRO.7.76.6.1801061337020.1337@wbunaarf-fpuvaqryva.tvgsbejvaqbjf.bet/)

2. 87mv1raz9p.fsf@evledraar.gmail.com
   (https://public-inbox.org/git/87mv1raz9p.fsf@evledraar.gmail.com/)

Signed-off-by: Ævar Arnfjörð Bjarmason <avarab@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2018-01-30 14:04:01 -08:00
Ævar Arnfjörð Bjarmason 5b1fe6ebb7 test-lib: add an EXPENSIVE_ON_WINDOWS prerequisite
Add an EXPENSIVE_ON_WINDOWS prerequisite to mark those tests which are
very expensive to run on Windows, but cheap elsewhere.

Certain tests that heavily stress the filesystem or run a lot of shell
commands are disproportionately expensive on Windows, this
prerequisite will later be used by a tests that runs in 4-8 seconds on
a modern Linux system, but takes almost 10 minutes on Windows.

There's no reason to skip such tests by default on other platforms,
but Windows users shouldn't need to wait around while they finish.

Signed-off-by: Ævar Arnfjörð Bjarmason <avarab@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2018-01-30 14:04:01 -08:00
Ævar Arnfjörð Bjarmason de8bada2bf wildmatch test: create & test files on disk in addition to in-memory
There has never been any full roundtrip testing of what git-ls-files
and other commands that use wildmatch() actually do, rather we've been
satisfied with just testing the underlying C function.

Due to git-ls-files and friends having their own codepaths before they
call wildmatch() there's sometimes differences in the behavior between
the two. Even when we test for those (as with [1]), there was no one
place where you can review how these two modes differ.

Now there is. We now attempt to create a file called $haystack and
match $needle against it for each pair of $needle and $haystack that
we were passing to test-wildmatch.

If we can't create the file we skip the test. This ensures that we can
run this on all platforms and not maintain some infinitely growing
whitelist of e.g. platforms that don't support certain characters in
filenames.

A notable exception to this is Windows, where due to the reasons
explained in [2] the shellscript emulation layer might fake the
creation of a file such as "*", and "test -e" for it will succeed
since it just got created with some character that maps to "*", but
git ls-files won't be fooled by this.

Thus we need to skip creating certain filenames entirely on Windows,
the list here might be overly aggressive. I don't have access to a
Windows system to test this.

As a result of doing these tests we can now see the cases where these
two ways of testing wildmatch differ:

 * Creating a file called 'a[]b' and running ls-files 'a[]b' will show
   that file, but wildmatch("a[]b", "a[]b") will not match

 * wildmatch() won't match a file called \ against \, but ls-files
   will.

 * `git --glob-pathspecs ls-files 'foo**'` will match a file
   'foo/bba/arr', but wildmatch won't, however pathmatch will.

   This seems like a bug to me, the two are otherwise equivalent as
   these tests show.

This also reveals the case discussed in [1], since 2.16.0 '' is now an
error as far as ls-files is concerned, but wildmatch() itself happily
accepts it.

1. 9e4e8a64c2 ("pathspec: die on empty strings as pathspec",
   2017-06-06)

2. nycvar.QRO.7.76.6.1801052133380.1337@wbunaarf-fpuvaqryva.tvgsbejvaqbjf.bet
   (https://public-inbox.org/git/?q=nycvar.QRO.7.76.6.1801052133380.1337%40wbunaarf-fpuvaqryva.tvgsbejvaqbjf.bet)

Signed-off-by: Ævar Arnfjörð Bjarmason <avarab@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2018-01-30 14:04:01 -08:00
Ævar Arnfjörð Bjarmason 91061c444a wildmatch test: perform all tests under all wildmatch() modes
Rewrite the wildmatch() test suite so that each test now tests all
combinations of the wildmatch() WM_CASEFOLD and WM_PATHNAME flags.

Before this change some test inputs were not tested on
e.g. WM_PATHNAME. Now the function is stress tested on all possible
inputs, and for each input we declare what the result should be if the
mode is case-insensitive, or pathname matching, or case-sensitive or
not matching pathnames.

Also before this change, nothing was testing case-insensitive
non-pathname matching, so I've added that to test-wildmatch.c and made
use of it.

This yields a rather scary patch, but there are no functional changes
here, just more test coverage. Some now-redundant tests were deleted
as a result of this change, since they were now duplicating an earlier
test.

Signed-off-by: Ævar Arnfjörð Bjarmason <avarab@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2018-01-30 14:04:01 -08:00
Ævar Arnfjörð Bjarmason 4bc280f250 wildmatch test: use test_must_fail, not ! for test-wildmatch
Use of ! should be reserved for non-git programs that are assumed not
to fail, see README. With this change only
t/t0110-urlmatch-normalization.sh is still using this anti-pattern.

Signed-off-by: Ævar Arnfjörð Bjarmason <avarab@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2018-01-30 14:04:01 -08:00
Ævar Arnfjörð Bjarmason 50eafb1a27 wildmatch test: remove dead fnmatch() test code
Remove the unused fnmatch() test parameter from the wildmatch
test. The code that used to test this was removed in 70a8fc999d ("stop
using fnmatch (either native or compat)", 2014-02-15).

As a --word-diff shows the only change to the body of the tests is the
removal of the second out of four parameters passed to match().

Signed-off-by: Ævar Arnfjörð Bjarmason <avarab@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2018-01-30 14:04:01 -08:00
Ævar Arnfjörð Bjarmason 5684c2bc69 wildmatch test: use a paranoia pattern from nul_match()
Use a pattern from the nul_match() function in t7008-grep-binary.sh to
make sure that we don't just fall through to the "else" if there's an
unknown parameter.

This is something I added in commit 77f6f4406f ("grep: add a test
helper function for less verbose -f \0 tests", 2017-05-20) to grep
tests, which were modeled on these wildmatch tests, and I'm now
porting back to the original wildmatch tests.

I am not using the "say '...'; exit 1" pattern from t0000-basic.sh
because if I fail I want to run the rest of the tests (unless under
-i), and doing this makes sure we do that and don't exit right away
without fully reporting our errors.

Signed-off-by: Ævar Arnfjörð Bjarmason <avarab@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2018-01-30 14:04:00 -08:00
Ævar Arnfjörð Bjarmason f5ebe8f3f1 wildmatch test: don't try to vertically align our output
Don't try to vertically align the test output, which is futile anyway
under the TAP output where we're going to be emitting a number for
each test without aligning the test count.

This makes subsequent changes of mine where I'm not going to be
aligning this output as I add new tests easier.

Signed-off-by: Ævar Arnfjörð Bjarmason <avarab@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2018-01-30 14:04:00 -08:00
Ævar Arnfjörð Bjarmason 5008ba8c5e wildmatch test: use more standard shell style
Change the wildmatch test to use more standard shell style, usually we
use "if test" not "if [".

Signed-off-by: Ævar Arnfjörð Bjarmason <avarab@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2018-01-30 14:04:00 -08:00
Ævar Arnfjörð Bjarmason a4a136f56e wildmatch test: indent with tabs, not spaces
Replace the 4-width mixed space & tab indentation in this file with
indentation with tabs as we do in most of the rest of our tests.

Signed-off-by: Ævar Arnfjörð Bjarmason <avarab@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2018-01-30 14:04:00 -08:00
SZEDER Gábor 6b995760dc travis-ci: don't fail if user already exists on 32 bit Linux build job
The 32 bit Linux build job runs in a Docker container, which lends
itself to running and debugging locally, too.  Especially during
debugging one usually doesn't want to start with a fresh container
every time, to save time spent on installing a bunch of dependencies.
However, that doesn't work quite smootly, because the script running
in the container always creates a new user, which then must be removed
every time before subsequent executions, or the build script fails.

Make this process more convenient and don't try to create that user if
it already exists and has the right user ID in the container, so
developers don't have to bother with running a 'userdel' each time
before they run the build script.

The build job on Travis CI always starts with a fresh Docker
container, so this change doesn't make a difference there.

Signed-off-by: SZEDER Gábor <szeder.dev@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2018-01-30 13:27:19 -08:00
SZEDER Gábor 533033024a travis-ci: don't run the test suite as root in the 32 bit Linux build
Travis CI runs the 32 bit Linux build job in a Docker container, where
all commands are executed as root by default.  Therefore, ever since
we added this build job in 88dedd5e7 (Travis: also test on 32-bit
Linux, 2017-03-05), we have a bit of code to create a user in the
container matching the ID of the host user and then to run the test
suite as this user.  Matching the host user ID is important, because
otherwise the host user would have no access to any files written by
processes running in the container, notably the logs of failed tests
couldn't be included in the build job's trace log.

Alas, this piece of code never worked, because it sets the variable
holding the user name ($CI_USER) in a subshell, meaning it doesn't
have any effect by the time we get to the point to actually use the
variable to switch users with 'su'.  So all this time we were running
the test suite as root.

Reorganize that piece of code in 'ci/run-linux32-build.sh' a bit to
avoid that problematic subshell and to ensure that we switch to the
right user.  Furthermore, make the script's optional host user ID
option mandatory, so running the build accidentally as root will
become harder when debugging locally.  If someone really wants to run
the test suite as root, whatever the reasons might be, it'll still be
possible to do so by explicitly passing '0' as host user ID.

Finally, one last catch: since commit 7e72cfcee (travis-ci: save prove
state for the 32 bit Linux build, 2017-12-27) the 'prove' test harness
has been writing its state to the Travis CI cache directory from
within the Docker container while running as root.  After this patch
'prove' will run as a regular user, so in future build jobs it won't
be able overwrite a previously written, still root-owned state file,
resulting in build job failures.  To resolve this we should manually
delete caches containing such root-owned files, but that would be a
hassle.  Instead, work this around by changing the owner of the whole
contents of the cache directory to the host user ID.

Signed-off-by: SZEDER Gábor <szeder.dev@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2018-01-30 13:27:19 -08:00
SZEDER Gábor b2cbaa091c travis-ci: don't repeat the path of the cache directory
Some of our 'ci/*' scripts repeat the name or full path of the Travis
CI cache directory, and the following patches will add new places
using that path.

Use a variable to refer to the path of the cache directory instead, so
it's hard-coded only in a single place.

Pay extra attention to the 32 bit Linux build: it runs in a Docker
container, so pass the path of the cache directory from the host to
the container in an environment variable.  Note that an environment
variable passed this way is exported inside the container, therefore
its value is directly available in the 'su' snippet even though that
snippet is single quoted.  Furthermore, use the variable in the
container only if it's been assigned a non-empty value, to prevent
errors when someone is running or debugging the Docker build locally,
because in that case the variable won't be set as there won't be any
Travis CI cache.

Signed-off-by: SZEDER Gábor <szeder.dev@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2018-01-30 13:27:19 -08:00
SZEDER Gábor 04d47e969a travis-ci: use 'set -e' in the 32 bit Linux build job
The script 'ci/run-linux32-build.sh' running inside the Docker
container of the 32 bit Linux build job uses an && chain to break the
build if one of the commands fails.  This is problematic for two
reasons:

  - The && chain is broken, because there is this in the middle:

    test -z $HOST_UID || (CI_USER="ci" && useradd -u $HOST_UID $CI_USER) &&

    Luckily it is broken in a way that it didn't lead to false
    successes.  If installing dependencies fails, then the rest of the
    first && chain is skipped and execution resumes  after the ||
    operator.  At that point $HOST_UID is still unset, causing
    'useradd' to error out with "invalid user ID 'ci'", which in turn
    causes the second && chain to abort the script and thus break the
    build.

  - All other 'ci/*' scripts use 'set -e' to break the build if one of
    the commands fails.  This inconsistency among these scripts is
    asking for trouble: I forgot about the && chain more than once
    while working on this patch series.

Enable 'set -e' for the whole script and for the commands executed
under 'su' as well.

While touching every line in the 'su' command block anyway, change
their indentation to use a tab instead of spaces.

Signed-off-by: SZEDER Gábor <szeder.dev@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2018-01-30 13:27:18 -08:00
SZEDER Gábor f63b12392a travis-ci: use 'set -x' for the commands under 'su' in the 32 bit Linux build
Signed-off-by: SZEDER Gábor <szeder.dev@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2018-01-30 13:27:18 -08:00
Eric Wong 7f6f75e97a git-svn: control destruction order to avoid segfault
It seems necessary to control destruction ordering to avoid a
segfault with SVN 1.9.5 when using "git svn branch".  I've also
reported the problem against libsvn-perl to Debian [Bug #888791],
but releasing the SVN::Client instance can be beneficial anyways to
save memory.

ref: https://bugs.debian.org/888791
Tested-by: Todd Zullinger <tmz@pobox.com>
Reported-by: brian m. carlson <sandals@crustytoothpaste.net>
Signed-off-by: Eric Wong <e@80x24.org>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2018-01-30 13:14:38 -08:00
Todd Zullinger 9f5258cbb8 doc: mention 'git show' defaults to HEAD
When 'git show' is called without any object it defaults to HEAD.  This
has been true since d4ed9793fd ("Simplify common default options setup
for built-in log family.", 2006-04-16).

The SYNOPSIS suggests that the object argument is required.  Clarify
that it is not required and note the default.

Signed-off-by: Todd Zullinger <tmz@pobox.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2018-01-30 13:12:18 -08:00
Patryk Obara 1752cbbc44 sha1_file: rename hash_sha1_file_literally
This function was already converted to use struct object_id earlier.

Signed-off-by: Patryk Obara <patryk.obara@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2018-01-30 10:42:36 -08:00
Patryk Obara 3fc7281ffa sha1_file: convert write_loose_object to object_id
Convert the definition and declaration of static write_loose_object
function to struct object_id.

Signed-off-by: Patryk Obara <patryk.obara@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2018-01-30 10:42:36 -08:00
Patryk Obara 4bdb70a4f7 sha1_file: convert force_object_loose to object_id
Convert the definition and declaration of force_object_loose to
struct object_id and adjust usage of this function.

Signed-off-by: Patryk Obara <patryk.obara@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2018-01-30 10:42:36 -08:00
Patryk Obara a09c985eae sha1_file: convert write_sha1_file to object_id
Convert the definition and declaration of write_sha1_file to
struct object_id and adjust usage of this function.

This commit also converts static function write_sha1_file_prepare, as it
is closely related.

Rename these functions to write_object_file and
write_object_file_prepare respectively.

Replace sha1_to_hex, hashcpy and hashclr with their oid equivalents
wherever possible.

Signed-off-by: Patryk Obara <patryk.obara@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2018-01-30 10:42:36 -08:00
Patryk Obara bbca96d579 notes: convert write_notes_tree to object_id
Convert the definition and declaration of write_notes_tree to
struct object_id and adjust usage of this function.

Additionally, improve style of small part of this function, as old
formatting made it hard to understand at glance what this part of
code is doing.

Signed-off-by: Patryk Obara <patryk.obara@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2018-01-30 10:42:36 -08:00
Patryk Obara b7d591d17b notes: convert combine_notes_* to object_id
Convert the definition and declarations of combine_notes_* functions
to struct object_id and adjust usage of these functions.

Signed-off-by: Patryk Obara <patryk.obara@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2018-01-30 10:42:36 -08:00
Patryk Obara 5078f34459 commit: convert commit_tree* to object_id
Convert the definitions and declarations of commit_tree and
commit_tree_extended to use struct object_id and adjust all usages of
these functions.

Signed-off-by: Patryk Obara <patryk.obara@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2018-01-30 10:42:36 -08:00
Patryk Obara 3b34934dca match-trees: convert splice_tree to object_id
Convert the definition of static recursive splice_tree function to use
struct object_id and adjust single caller.

Signed-off-by: Patryk Obara <patryk.obara@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2018-01-30 10:42:36 -08:00
Patryk Obara 97a41a0c01 cache: clear whole hash buffer with oidclr
As long as GIT_SHA1_RAWSZ is equal to GIT_MAX_RAWSZ there's no problem,
but when new hashing algorithm will be in place this memset will clear
only 20-byte prefix of hash buffer.

Alternatively, hashclr implementation could be adjusted, but this
function is almost removed from codebase already.  Separate
implementation of oidclr prevents potential buffer overrun in case
someone incorrectly used hashclr on object_id in future.

Signed-off-by: Patryk Obara <patryk.obara@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2018-01-30 10:42:36 -08:00
Patryk Obara f070faccc1 sha1_file: convert hash_sha1_file to object_id
Convert the declaration and definition of hash_sha1_file to use
struct object_id and adjust all function calls.

Rename this function to hash_object_file.

Signed-off-by: Patryk Obara <patryk.obara@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2018-01-30 10:42:36 -08:00