Commit Graph

50603 Commits

Author SHA1 Message Date
Junio C Hamano
085f5f95a2 Git 2.17-rc1
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2018-03-21 12:02:04 -07:00
Junio C Hamano
d16c37964c Merge branch 'jk/attributes-path-doc'
Doc update.

* jk/attributes-path-doc:
  doc/gitattributes: mention non-recursive behavior
2018-03-21 11:30:15 -07:00
Junio C Hamano
d17811154b Merge branch 'rj/warning-uninitialized-fix'
Compilation fix.

* rj/warning-uninitialized-fix:
  read-cache: fix an -Wmaybe-uninitialized warning
  -Wuninitialized: remove some 'init-self' workarounds
2018-03-21 11:30:15 -07:00
Junio C Hamano
c108a77f8f Merge branch 'tz/complete-tag-delete-tagname'
* tz/complete-tag-delete-tagname:
  completion: complete tags with git tag --delete/--verify
2018-03-21 11:30:15 -07:00
Junio C Hamano
f46cdf4a3a Merge branch 'ml/filter-branch-portability-fix'
Shell script portability fix.

* ml/filter-branch-portability-fix:
  filter-branch: use printf instead of echo -e
2018-03-21 11:30:14 -07:00
Junio C Hamano
4c5dbf1c14 Merge branch 'js/ming-strftime'
* js/ming-strftime:
  mingw: abort on invalid strftime formats
2018-03-21 11:30:14 -07:00
Junio C Hamano
e2a37ec2b0 Merge branch 'dp/merge-strategy-doc-fix'
Doc fix.

* dp/merge-strategy-doc-fix:
  Documentation/merge-strategies: typofix
2018-03-21 11:30:13 -07:00
Junio C Hamano
bfaab4885a Merge branch 'tz/relnotes-1.7-on-perl'
* tz/relnotes-1.7-on-perl:
  RelNotes: add details on Perl module changes
2018-03-21 11:30:12 -07:00
Junio C Hamano
79cc6432ec Merge branch 'rj/http-code-cleanup'
There was an unused file-scope static variable left in http.c when
building for versions of libCURL that is older than 7.19.4, which
has been fixed.

* rj/http-code-cleanup:
  http: fix an unused variable warning for 'curl_no_proxy'
2018-03-21 11:30:12 -07:00
Junio C Hamano
564710379b Merge branch 'ks/t3200-typofix'
Test typofix.

* ks/t3200-typofix:
  t/t3200: fix a typo in a test description
2018-03-21 11:30:12 -07:00
Junio C Hamano
f62452ecfc Merge branch 'jt/transfer-fsck-with-promissor'
The transfer.fsckobjects configuration tells "git fetch" to
validate the data and connected-ness of objects in the received
pack; the code to perform this check has been taught about the
narrow clone's convention that missing objects that are reachable
from objects in a pack that came from a promissor remote is OK.

* jt/transfer-fsck-with-promissor:
  fetch-pack: do not check links for partial fetch
  index-pack: support checking objects but not links
2018-03-21 11:30:11 -07:00
Junio C Hamano
fddf9a2d06 Merge branch 'bp/refresh-cache-ent-rehash-fix'
The codepath to replace an existing entry in the index had a bug in
updating the name hash structure, which has been fixed.

* bp/refresh-cache-ent-rehash-fix:
  Fix bugs preventing adding updated cache entries to the name hash
2018-03-21 11:30:11 -07:00
Junio C Hamano
649406644d Merge branch 'jh/fsck-promisors'
A hotfix to a topic that graduated recently.

* jh/fsck-promisors:
  sha1_file: restore OBJECT_INFO_QUICK functionality
2018-03-21 11:30:10 -07:00
Junio C Hamano
beb2cdf504 Merge branch 'ma/skip-writing-unchanged-index'
Internal API clean-up to allow write_locked_index() optionally skip
writing the in-core index when it is not modified.

* ma/skip-writing-unchanged-index:
  write_locked_index(): add flag to avoid writing unchanged index
2018-03-21 11:30:10 -07:00
Junio C Hamano
75901dfd52 Merge branch 'ma/config-page-only-in-list-mode'
In a way similar to how "git tag" learned to honor the pager
setting only in the list mode, "git config" learned to ignore the
pager setting when it is used for setting values (i.e. when the
purpose of the operation is not to "show").

* ma/config-page-only-in-list-mode:
  config: change default of `pager.config` to "on"
  config: respect `pager.config` in list/get-mode only
  t7006: add tests for how git config paginates
2018-03-21 11:30:09 -07:00
Jeff King
b635ed97a0 doc/gitattributes: mention non-recursive behavior
The gitattributes documentation claims that the pattern
rules are largely the same as for gitignore. However, the
rules for recursion are different.

In an ideal world, we would make them the same (if for
nothing else than consistency and simplicity), but that
would create backwards compatibility issues. For some
discussion, see this thread:

  https://public-inbox.org/git/slrnkldd3g.1l4.jan@majutsushi.net/

But let's at least document the differences instead of
actively misleading the user by claiming that they're the
same.

Signed-off-by: Jeff King <peff@peff.net>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2018-03-20 10:01:03 -07:00
Ramsay Jones
00a4b03501 read-cache: fix an -Wmaybe-uninitialized warning
The function ce_write_entry() uses a 'self-initialised' variable
construct, for the symbol 'saved_namelen', to suppress a gcc
'-Wmaybe-uninitialized' warning, given that the warning is a false
positive.

For the purposes of this discussion, the ce_write_entry() function has
three code blocks of interest, that look like so:

        /* block #1 */
        if (ce->ce_flags & CE_STRIP_NAME) {
                saved_namelen = ce_namelen(ce);
                ce->ce_namelen = 0;
        }

        /* block #2 */
        /*
	 * several code blocks that contain, among others, calls
         * to copy_cache_entry_to_ondisk(ondisk, ce);
         */

        /* block #3 */
        if (ce->ce_flags & CE_STRIP_NAME) {
                ce->ce_namelen = saved_namelen;
                ce->ce_flags &= ~CE_STRIP_NAME;
        }

The warning implies that gcc thinks it is possible that the first
block is not entered, the calls to copy_cache_entry_to_ondisk()
could toggle the CE_STRIP_NAME flag on, thereby entering block #3
with saved_namelen unset. However, the copy_cache_entry_to_ondisk()
function does not write to ce->ce_flags (it only reads). gcc could
easily determine this, since that function is local to this file,
but it obviously doesn't.

In order to suppress this warning, we make it clear to the reader
(human and compiler), that block #3 will only be entered when the
first block has been entered, by introducing a new 'stripped_name'
boolean variable. We also take the opportunity to change the type
of 'saved_namelen' to 'unsigned int' to match ce->ce_namelen.

Signed-off-by: Ramsay Jones <ramsay@ramsayjones.plus.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2018-03-20 09:59:21 -07:00
Ramsay Jones
156e1782a8 -Wuninitialized: remove some 'init-self' workarounds
The 'self-initialised' variables construct (ie <type> var = var;) has
been used to silence gcc '-W[maybe-]uninitialized' warnings. This has,
unfortunately, caused MSVC to issue 'uninitialized variable' warnings.
Also, using clang static analysis causes complaints about an 'Assigned
value is garbage or undefined'.

There are six such constructs in the current codebase. Only one of the
six causes gcc to issue a '-Wmaybe-uninitialized' warning (which will
be addressed elsewhere). The remaining five 'init-self' gcc workarounds
are noted below, along with the commit which introduced them:

  1. builtin/rev-list.c: 'reaches' and 'all', see commit 457f08a030
     ("git-rev-list: add --bisect-vars option.", 2007-03-21).

  2. merge-recursive.c:2064 'mrtree', see commit f120ae2a8e ("merge-
     recursive.c: mrtree in merge() is not used before set", 2007-10-29).

  3. fast-import.c:3023 'oe', see commit 85c62395b1 ("fast-import: let
     importers retrieve blobs", 2010-11-28).

  4. fast-import.c:3006 'oe', see commit 28c7b1f7b7 ("fast-import: add a
     get-mark command", 2015-07-01).

Remove the 'self-initialised' variable constructs noted above.

Signed-off-by: Ramsay Jones <ramsay@ramsayjones.plus.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2018-03-20 09:59:21 -07:00
Michele Locati
206a6ae013 filter-branch: use printf instead of echo -e
In order to echo a tab character, it's better to use printf instead of
"echo -e", because it's more portable (for instance, "echo -e" doesn't work
as expected on a Mac).

This solves the "fatal: Not a valid object name" error in git-filter-branch
when using the --state-branch option.

Furthermore, let's switch from "/bin/echo" to just "echo", so that the
built-in echo command is used where available.

Signed-off-by: Michele Locati <michele@locati.it>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2018-03-19 10:59:28 -07:00
Johannes Schindelin
9ee0540a40 mingw: abort on invalid strftime formats
On Windows, strftime() does not silently ignore invalid formats, but
warns about them and then returns 0 and sets errno to EINVAL.

Unfortunately, Git does not expect such a behavior, as it disagrees
with strftime()'s semantics on Linux. As a consequence, Git
misinterprets the return value 0 as "I need more space" and grows the
buffer. As the larger buffer does not fix the format, the buffer grows
and grows and grows until we are out of memory and abort.

Ideally, we would switch off the parameter validation just for
strftime(), but we cannot even override the invalid parameter handler
via _set_thread_local_invalid_parameter_handler() using MINGW because
that function is not declared. Even _set_invalid_parameter_handler(),
which *is* declared, does not help, as it simply does... nothing.

So let's just bite the bullet and override strftime() for MINGW and
abort on an invalid format string. While this does not provide the
best user experience, it is the best we can do.

See https://msdn.microsoft.com/en-us/library/fe06s4ak.aspx for more
details.

This fixes https://github.com/git-for-windows/git/issues/863

Signed-off-by: Johannes Schindelin <johannes.schindelin@gmx.de>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2018-03-19 10:53:17 -07:00
Todd Zullinger
1775e990f7 completion: complete tags with git tag --delete/--verify
Completion of tag names has worked for the short -d/-v options since
88e21dc746 ("Teach bash about completing arguments for git-tag",
2007-08-31).  The long options were not added to "git tag" until many
years later, in c97eff5a95 ("git-tag: introduce long forms for the
options", 2011-08-28).

Extend tag name completion to --delete/--verify.

Signed-off-by: Todd Zullinger <tmz@pobox.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2018-03-19 09:55:01 -07:00
David Pursehouse
bd9958c358 Documentation/merge-strategies: typofix
It's strategy, not stragegy.

Signed-off-by: David Pursehouse <dpursehouse@collab.net>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2018-03-19 09:47:56 -07:00
Todd Zullinger
14f437f338 RelNotes: add details on Perl module changes
Document changes to core and non-core Perl module handling in 2.17.

Signed-off-by: Todd Zullinger <tmz@pobox.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2018-03-16 16:07:37 -07:00
Junio C Hamano
0afbf6caa5 Git 2.17-rc0
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2018-03-15 15:01:05 -07:00
Junio C Hamano
e215e89791 Merge branch 'tl/userdiff-csharp-async'
Update funcname pattern used for C# to recognize "async" keyword.

* tl/userdiff-csharp-async:
  userdiff.c: add C# async keyword in diff pattern
2018-03-15 15:00:47 -07:00
Junio C Hamano
9ecfd98a87 Merge branch 'sg/cvs-tests-with-x'
Allow running a couple of tests with "sh -x".

* sg/cvs-tests-with-x:
  t9402-git-cvsserver-refs: don't check the stderr of a subshell
  t9400-git-cvsserver-server: don't rely on the output of 'test_cmp'
2018-03-15 15:00:46 -07:00
Junio C Hamano
a8ba07c68a Merge branch 'ab/man-sec-list'
Doc update.

* ab/man-sec-list:
  git manpage: note git-security@googlegroups.com
2018-03-15 15:00:46 -07:00
Junio C Hamano
ae1644b08e Merge branch 'ab/perl-fixes'
Clean-up to various pieces of Perl code we have.

* ab/perl-fixes:
  perl Git::LoadCPAN: emit better errors under NO_PERL_CPAN_FALLBACKS
  Makefile: add NO_PERL_CPAN_FALLBACKS knob
  perl: move the perl/Git/FromCPAN tree to perl/FromCPAN
  perl: generalize the Git::LoadCPAN facility
  perl: move CPAN loader wrappers to another namespace
  perl: update our copy of Mail::Address
  perl: update our ancient copy of Error.pm
  git-send-email: unconditionally use Net::{SMTP,Domain}
  Git.pm: hard-depend on the File::{Temp,Spec} modules
  gitweb: hard-depend on the Digest::MD5 5.8 module
  Git.pm: add the "use warnings" pragma
  Git.pm: remove redundant "use strict" from sub-package
  perl: *.pm files should not have the executable bit
2018-03-15 15:00:46 -07:00
Junio C Hamano
e74737b6a1 Merge branch 'cl/send-email-reply-to'
"git send-email" learned "--reply-to=<address>" option.

* cl/send-email-reply-to:
  send-email: support separate Reply-To address
  send-email: rename variable for clarity
2018-03-15 15:00:45 -07:00
Junio C Hamano
fbc615b70a Merge branch 'np/send-email-header-parsing'
Code refactoring.

* np/send-email-header-parsing:
  send-email: extract email-parsing code into a subroutine
2018-03-15 15:00:45 -07:00
Kaartic Sivaraam
40c17eb184 t/t3200: fix a typo in a test description
Signed-off-by: Kaartic Sivaraam <kaartic.sivaraam@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2018-03-15 13:34:40 -07:00
Ramsay Jones
b8fd6008ec http: fix an unused variable warning for 'curl_no_proxy'
Signed-off-by: Ramsay Jones <ramsay@ramsayjones.plus.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2018-03-15 13:11:52 -07:00
Ben Peart
0e267b7a24 Fix bugs preventing adding updated cache entries to the name hash
Update replace_index_entry() to clear the CE_HASHED flag from the new cache
entry so that it can add it to the name hash in set_index_entry()

Fix refresh_cache_ent() to use the copy_cache_entry() macro instead of memcpy()
so that it doesn't incorrectly copy the hash state from the old entry.

Signed-off-by: Ben Peart <benpeart@microsoft.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2018-03-15 10:58:30 -07:00
Jonathan Tan
98a2ea46c2 fetch-pack: do not check links for partial fetch
When doing a partial clone or fetch with transfer.fsckobjects=1, use the
--fsck-objects instead of the --strict flag when invoking index-pack so
that links are not checked, only objects. This is because incomplete
links are expected when doing a partial clone or fetch.

Signed-off-by: Jonathan Tan <jonathantanmy@google.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2018-03-15 10:16:27 -07:00
Jonathan Tan
ffb2c0fe5c index-pack: support checking objects but not links
The index-pack command currently supports the
--check-self-contained-and-connected argument, for internal use only,
that instructs it to only check for broken links and not broken objects.
For partial clones, we need the inverse, so add a --fsck-objects
argument that checks for broken objects and not broken links, also for
internal use only.

This will be used by fetch-pack in a subsequent patch.

Signed-off-by: Jonathan Tan <jonathantanmy@google.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2018-03-15 10:16:24 -07:00
Junio C Hamano
7fb6aefd2a Merge branch 'nd/parseopt-completion'
Teach parse-options API an option to help the completion script,
and make use of the mechanism in command line completion.

* nd/parseopt-completion: (45 commits)
  completion: more subcommands in _git_notes()
  completion: complete --{reuse,reedit}-message= for all notes subcmds
  completion: simplify _git_notes
  completion: don't set PARSE_OPT_NOCOMPLETE on --rerere-autoupdate
  completion: use __gitcomp_builtin in _git_worktree
  completion: use __gitcomp_builtin in _git_tag
  completion: use __gitcomp_builtin in _git_status
  completion: use __gitcomp_builtin in _git_show_branch
  completion: use __gitcomp_builtin in _git_rm
  completion: use __gitcomp_builtin in _git_revert
  completion: use __gitcomp_builtin in _git_reset
  completion: use __gitcomp_builtin in _git_replace
  remote: force completing --mirror= instead of --mirror
  completion: use __gitcomp_builtin in _git_remote
  completion: use __gitcomp_builtin in _git_push
  completion: use __gitcomp_builtin in _git_pull
  completion: use __gitcomp_builtin in _git_notes
  completion: use __gitcomp_builtin in _git_name_rev
  completion: use __gitcomp_builtin in _git_mv
  completion: use __gitcomp_builtin in _git_merge_base
  ...
2018-03-14 12:01:07 -07:00
Junio C Hamano
99321e327b Merge branch 'nd/object-allocation-comments'
Code doc update.

* nd/object-allocation-comments:
  object.h: realign object flag allocation comment
  object.h: update flag allocation comment
2018-03-14 12:01:06 -07:00
Junio C Hamano
88506cb887 Merge branch 'jk/smart-http-protocol-doc-fix'
A doc update.

* jk/smart-http-protocol-doc-fix:
  smart-http: document flush after "# service" line
2018-03-14 12:01:06 -07:00
Junio C Hamano
c5e2df04ac Merge branch 'jk/add-i-diff-filter'
The "interactive.diffFilter" used by "git add -i" must retain
one-to-one correspondence between its input and output, but it was
not enforced and caused end-user confusion.  We now at least make
sure the filtered result has the same number of lines as its input
to detect a broken filter.

* jk/add-i-diff-filter:
  add--interactive: detect bogus diffFilter output
  t3701: add a test for interactive.diffFilter
2018-03-14 12:01:05 -07:00
Junio C Hamano
bd0f794342 Merge branch 'nd/worktree-move'
"git worktree" learned move and remove subcommands.

* nd/worktree-move:
  t2028: fix minor error and issues in newly-added "worktree move" tests
  worktree remove: allow it when $GIT_WORK_TREE is already gone
  worktree remove: new command
  worktree move: refuse to move worktrees with submodules
  worktree move: accept destination as directory
  worktree move: new command
  worktree.c: add update_worktree_location()
  worktree.c: add validate_worktree()
2018-03-14 12:01:05 -07:00
Junio C Hamano
436d18f2d0 Merge branch 'pw/add-p-recount'
"git add -p" has been lazy in coalescing split patches before
passing the result to underlying "git apply", leading to corner
case bugs; the logic to prepare the patch to be applied after hunk
selections has been tightened.

* pw/add-p-recount:
  add -p: don't rely on apply's '--recount' option
  add -p: fix counting when splitting and coalescing
  add -p: calculate offset delta for edited patches
  add -p: adjust offsets of subsequent hunks when one is skipped
  t3701: add failing test for pathological context lines
  t3701: don't hard code sha1 hash values
  t3701: use test_write_lines and write_script
  t3701: indent here documents
  add -i: add function to format hunk header
2018-03-14 12:01:04 -07:00
Junio C Hamano
b423234dde Merge branch 'ab/pre-auto-gc-battery'
A sample auto-gc hook (in contrib/) to skip auto-gc while on
battery has been updated to almost always allow running auto-gc
unless on_ac_power command is absolutely sure that we are on
battery power (earlier, it skipped unless the command is sure that
we are on ac power).

* ab/pre-auto-gc-battery:
  hooks/pre-auto-gc-battery: allow gc to run on non-laptops
2018-03-14 12:01:04 -07:00
Junio C Hamano
571e472dc4 Merge branch 'sg/test-x'
Running test scripts under -x option of the shell is often not a
useful way to debug them, because the error messages from the
commands tests try to capture and inspect are contaminated by the
tracing output by the shell.  An earlier work done to make it more
pleasant to run tests under -x with recent versions of bash is
extended to cover posix shells that do not support BASH_XTRACEFD.

* sg/test-x:
  travis-ci: run tests with '-x' tracing
  t/README: add a note about don't saving stderr of compound commands
  t1510-repo-setup: mark as untraceable with '-x'
  t9903-bash-prompt: don't check the stderr of __git_ps1()
  t5570-git-daemon: don't check the stderr of a subshell
  t5526: use $TRASH_DIRECTORY to specify the path of GIT_TRACE log file
  t5500-fetch-pack: don't check the stderr of a subshell
  t3030-merge-recursive: don't check the stderr of a subshell
  t1507-rev-parse-upstream: don't check the stderr of a shell function
  t: add means to disable '-x' tracing for individual test scripts
  t: prevent '-x' tracing from interfering with test helpers' stderr
2018-03-14 12:01:03 -07:00
Junio C Hamano
d92a015660 Merge branch 'rj/test-i18ngrep'
Test updates.

* rj/test-i18ngrep:
  t5536: simplify checking of messages output to stderr
  t4151: consolidate multiple calls to test_i18ngrep
2018-03-14 12:01:03 -07:00
Junio C Hamano
787aa97f21 Merge branch 'ma/roll-back-lockfiles'
Some codepaths used to take a lockfile and did not roll it back;
they are automatically rolled back at program exit, so there is no
real "breakage", but it still is a good practice to roll back when
you are done with a lockfile.

* ma/roll-back-lockfiles:
  sequencer: do not roll back lockfile unnecessarily
  merge: always roll back lock in `checkout_fast_forward()`
  merge-recursive: always roll back lock in `merge_recursive_generic()`
  sequencer: always roll back lock in `do_recursive_merge()`
  sequencer: make lockfiles non-static
2018-03-14 12:01:03 -07:00
Junio C Hamano
868f7d2338 Merge branch 'nd/diff-stat-with-summary'
"git diff" and friends learned "--compact-summary" that shows the
information usually given with the "--summary" option on the same
line as the diffstat output of the "--stat" option (which saves
vertical space and keeps info on a single path at the same place).

* nd/diff-stat-with-summary:
  diff: add --compact-summary
  diff.c: refactor pprint_rename() to use strbuf
2018-03-14 12:01:02 -07:00
Jonathan Tan
2b7750c923 sha1_file: restore OBJECT_INFO_QUICK functionality
Support for the OBJECT_INFO_QUICK flag in sha1_object_info_extended()
was added in commit dfdd4afcf9 ("sha1_file: teach
sha1_object_info_extended more flags", 2017-06-26) in order to support
commit e83e71c5e1 ("sha1_file: refactor has_sha1_file_with_flags",
2017-06-26), but it was inadvertently removed in commit 8b4c0103a9
("sha1_file: support lazily fetching missing objects", 2017-12-08).

Restore this functionality.

Signed-off-by: Jonathan Tan <jonathantanmy@google.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2018-03-13 12:11:04 -07:00
SZEDER Gábor
c20bf94abc t9402-git-cvsserver-refs: don't check the stderr of a subshell
Four 'cvs diff' related tests in 't9402-git-cvsserver-refs.sh' fail
when the test script is run with '-x' tracing (and using a shell other
than a Bash version supporting BASH_XTRACEFD).  The reason for those
failures is that the tests check the emptiness of a subshell's stderr,
which includes the trace of commands executed in that subshell as
well, throwing off the emptiness check.

Save the stdout and stderr of the invoked 'cvs' command instead of the
whole subshell, so the latter remains free from tracing output.  (Note
that changing how stdout is saved is only done for the sake of
consistency, it's not necessary for correctness.)

After this change t9402 passes with '-x', even when running with
/bin/sh.

Signed-off-by: SZEDER Gábor <szeder.dev@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2018-03-08 15:37:14 -08:00
SZEDER Gábor
54ce2e9be9 t9400-git-cvsserver-server: don't rely on the output of 'test_cmp'
The test 'cvs update (-p)' redirects and checks 'test_cmp's stdout and
even its stderr.  The commit introducing this test in 6e8937a084
(cvsserver: Add test for update -p, 2008-03-27) doesn't discuss why,
in fact its log message only consists of that subject line.  Anyway,
weird as it is, it kind of made sense due to the way that test was
structured:

After a bit of preparation, this test updates four files via CVS and
checks their contents using 'test_cmp', but it does so in a for loop
iterating over the names of those four files.  Now, the exit status of
a for loop is the exit status of the last command executed in the
loop, meaning that the test can't simply rely on the exit code of
'test_cmp' in the loop's body.  Instead, the test works it around by
relying on the stdout of 'test_cmp' being silent on success and
showing the diff on failure, as it appends the stdout of all four
'test_cmp' invocations to a single file and checks that file's
emptiness after the loop (with 'test -z "$(cat ...)"', no less; there
was no 'test_must_be_empty' back then).  Furthermore, the test
redirects the stderr of those 'test_cmp' invocations to this file,
too: while 'test_cmp' itself doesn't output anything to stderr, the
invoked 'diff' or 'cmp' commands do send their error messages there,
e.g. if they can't open a file because its name was misspelled.

This also makes this test fail when the test script is run with '-x'
tracing (and using a shell other than a Bash version supporting
BASH_XTRACEFD), because 'test_cmp's stderr contains the trace of the
'diff' command executed inside the helper function, throwing off the
subsequent emptiness check.

Stop relying on 'test_cmp's output and instead run 'test_cmp a b ||
return 1' in the for loop in order to make 'test_cmp's error code fail
the test.  Furthermore, add the missing && after the cvs command to
create a && chain in the loop's body.

After this change t9400 passes with '-x', even when running with
/bin/sh.

Signed-off-by: SZEDER Gábor <szeder.dev@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2018-03-08 15:37:07 -08:00
Junio C Hamano
d0db9edba0 Eighth batch for 2.17
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2018-03-08 12:59:17 -08:00