Commit Graph

47282 Commits

Author SHA1 Message Date
Junio C Hamano
fd8567c990 Merge branch 'kn/ref-filter-branch-list' into maint
"git for-each-ref --format=..." with %(HEAD) in the format used to
resolve the HEAD symref as many times as it had processed refs,
which was wasteful, and "git branch" shared the same problem.

* kn/ref-filter-branch-list:
  ref-filter: resolve HEAD when parsing %(HEAD) atom
2017-06-05 09:03:13 +09:00
Junio C Hamano
a207ad7081 Merge branch 'rs/checkout-am-fix-unborn' into maint
A few codepaths in "checkout" and "am" working on an unborn branch
tried to access an uninitialized piece of memory.

* rs/checkout-am-fix-unborn:
  am: check return value of resolve_refdup before using hash
  checkout: check return value of resolve_refdup before using hash
2017-06-05 09:03:12 +09:00
Junio C Hamano
c8c3321633 Merge branch 'jn/clone-add-empty-config-from-command-line' into maint
"git clone --config var=val" is a way to populate the
per-repository configuration file of the new repository, but it did
not work well when val is an empty string.  This has been fixed.

* jn/clone-add-empty-config-from-command-line:
  clone: handle empty config values in -c
2017-06-05 09:03:11 +09:00
Junio C Hamano
b19174e2f3 Merge branch 'ab/c-translators-comment-style' into maint
Update the C style recommendation for notes for translators, as
recent versions of gettext tools can work with our style of
multi-line comments.

* ab/c-translators-comment-style:
  C style: use standard style for "TRANSLATORS" comments
2017-06-05 09:03:10 +09:00
Junio C Hamano
916a338754 Merge branch 'ls/travis-doc-asciidoctor' into maint
Travis CI gained a task to format the documentation with both
AsciiDoc and AsciiDoctor.

* ls/travis-doc-asciidoctor:
  travis-ci: check AsciiDoc/AsciiDoctor stderr output
  travis-ci: unset compiler for jobs that do not need one
  travis-ci: parallelize documentation build
  travis-ci: build documentation with AsciiDoc and Asciidoctor
2017-06-05 09:03:10 +09:00
Stefan Beller
68602c01fd Documentation/git-rm: correct submodule description
Since 3ccd681c2a (Merge branch 'sb/submodule-rm-absorb', 2017-01-18)
git-rm tries to absorb any submodules git dir before deleting the
submodule. Correct the documentation to say so.

Signed-off-by: Stefan Beller <sbeller@google.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2017-06-04 11:07:04 +09:00
Junio C Hamano
e215bd91bb Prepare for 2.13.1; more topics to follow
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2017-06-04 10:29:06 +09:00
Junio C Hamano
5ecbaaf101 Merge branch 'tg/stash-push-fixup' into maint
The shell completion script (in contrib/) learned "git stash" has
a new "push" subcommand.

* tg/stash-push-fixup:
  completion: add git stash push
2017-06-04 10:21:08 +09:00
Junio C Hamano
b522c33b45 Merge branch 'km/log-showsignature-doc' into maint
Doc update.

* km/log-showsignature-doc:
  config.txt: add an entry for log.showSignature
2017-06-04 10:21:07 +09:00
Junio C Hamano
e2ae5ec1f3 Merge branch 'jt/use-trailer-api-in-commands' into maint
"git cherry-pick" and other uses of the sequencer machinery
mishandled a trailer block whose last line is an incomplete line.
This has been fixed so that an additional sign-off etc. are added
after completing the existing incomplete line.

* jt/use-trailer-api-in-commands:
  sequencer: add newline before adding footers
2017-06-04 10:21:06 +09:00
Junio C Hamano
058d655f8f Merge branch 'jt/push-options-doc' into maint
The receive-pack program now makes sure that the push certificate
records the same set of push options used for pushing.

* jt/push-options-doc:
  receive-pack: verify push options in cert
  docs: correct receive.advertisePushOptions default
2017-06-04 10:21:05 +09:00
Junio C Hamano
34bbe2edd4 Merge branch 'js/plug-leaks' into maint
Fix memory leaks pointed out by Coverity (and people).

* js/plug-leaks: (26 commits)
  checkout: fix memory leak
  submodule_uses_worktrees(): plug memory leak
  show_worktree(): plug memory leak
  name-rev: avoid leaking memory in the `deref` case
  remote: plug memory leak in match_explicit()
  add_reflog_for_walk: avoid memory leak
  shallow: avoid memory leak
  line-log: avoid memory leak
  receive-pack: plug memory leak in update()
  fast-export: avoid leaking memory in handle_tag()
  mktree: plug memory leaks reported by Coverity
  pack-redundant: plug memory leak
  setup_discovered_git_dir(): plug memory leak
  setup_bare_git_dir(): help static analysis
  split_commit_in_progress(): simplify & fix memory leak
  checkout: fix memory leak
  cat-file: fix memory leak
  mailinfo & mailsplit: check for EOF while parsing
  status: close file descriptor after reading git-rebase-todo
  difftool: address a couple of resource/memory leaks
  ...
2017-06-04 10:21:04 +09:00
Junio C Hamano
7ba4fa5c08 Merge branch 'js/eol-on-ourselves' into maint
Make sure our tests would pass when the sources are checked out
with "platform native" line ending convention by default on
Windows.  Some "text" files out tests use and the test scripts
themselves that are meant to be run with /bin/sh, ought to be
checked out with eol=LF even on Windows.

* js/eol-on-ourselves:
  t4051: mark supporting files as requiring LF-only line endings
  Fix the remaining tests that failed with core.autocrlf=true
  t3901: move supporting files into t/t3901/
  completion: mark bash script as LF-only
  git-new-workdir: mark script as LF-only
  Fix build with core.autocrlf=true
2017-06-04 10:21:04 +09:00
Junio C Hamano
970fb22dd6 Merge branch 'jk/update-links-in-docs' into maint
A few http:// links that are redirected to https:// in the
documentation have been updated to https:// links.

* jk/update-links-in-docs:
  doc: use https links to Wikipedia to avoid http redirects
2017-06-04 10:21:04 +09:00
Junio C Hamano
8d958b97c6 Merge branch 'jk/ignore-broken-tags-when-ignoring-missing-links' into maint
Tag objects, which are not reachable from any ref, that point at
missing objects were mishandled by "git gc" and friends (they
should silently be ignored instead)

* jk/ignore-broken-tags-when-ignoring-missing-links:
  revision.c: ignore broken tags with ignore_missing_links
2017-06-04 10:21:03 +09:00
Junio C Hamano
aa5439d623 Merge branch 'jk/doc-config-include' into maint
Clarify documentation for include.path and includeIf.<condition>.path
configuration variables.

* jk/doc-config-include:
  docs/config: consistify include.path examples
  docs/config: avoid the term "expand" for includes
  docs/config: give a relative includeIf example
  docs/config: clarify include/includeIf relationship
2017-06-04 10:21:02 +09:00
Junio C Hamano
f305016f42 Merge branch 'jk/disable-pack-reuse-when-broken' into maint
"pack-objects" can stream a slice of an existing packfile out when
the pack bitmap can tell that the reachable objects are all needed
in the output, without inspecting individual objects.  This
strategy however would not work well when "--local" and other
options are in use, and need to be disabled.

* jk/disable-pack-reuse-when-broken:
  t5310: fix "; do" style
  pack-objects: disable pack reuse for object-selection options
2017-06-04 10:21:02 +09:00
Junio C Hamano
70d19a436d Merge branch 'jk/am-leakfix' into maint
The codepath in "git am" that is used when running "git rebase"
leaked memory held for the log message of the commits being rebased.

* jk/am-leakfix:
  am: shorten ident_split variable name in get_commit_info()
  am: simplify allocations in get_commit_info()
  am: fix commit buffer leak in get_commit_info()
2017-06-04 10:21:01 +09:00
Junio C Hamano
8a17b259e2 Merge branch 'jc/read-tree-empty-with-m' into maint
"git read-tree -m" (no tree-ish) gave a nonsense suggestion "use
--empty if you want to clear the index".  With "-m", such a request
will still fail anyway, as you'd need to name at least one tree-ish
to be merged.

* jc/read-tree-empty-with-m:
  read-tree: "read-tree -m --empty" does not make sense
2017-06-04 10:21:00 +09:00
Junio C Hamano
34a75ccb1d Merge branch 'jc/apply-fix-mismerge' into maint
Mismerge fix.

* jc/apply-fix-mismerge:
  apply.c: fix whitespace-only mismerge
2017-06-04 10:20:59 +09:00
Junio C Hamano
0501b7e785 Merge branch 'ja/do-not-ask-needless-questions' into maint
Git sometimes gives an advice in a rhetorical question that does
not require an answer, which can confuse new users and non native
speakers.  Attempt to rephrase them.

* ja/do-not-ask-needless-questions:
  git-filter-branch: be more direct in an error message
  read-tree -m: make error message for merging 0 trees less smart aleck
  usability: don't ask questions if no reply is required
2017-06-04 10:20:59 +09:00
Junio C Hamano
c95f0d2f9d Merge branch 'bw/submodule-with-bs-path' into maint
A hotfix to a topic that is already in v2.13.

* bw/submodule-with-bs-path:
  t7400: add !CYGWIN prerequisite to 'add with \\ in path'
2017-06-04 10:20:58 +09:00
Junio C Hamano
fb11de9ef5 Merge branch 'ah/log-decorate-default-to-auto' into maint
Setting "log.decorate=false" in the configuration file did not take
effect in v2.13, which has been corrected.

* ah/log-decorate-default-to-auto:
  builtin/log: honor log.decorate
2017-06-04 10:20:57 +09:00
Junio C Hamano
6c940eb94d Merge branch 'ab/fix-poison-tests' into maint
Update tests to pass under GETTEXT_POISON (a mechanism to ensure
that output strings that should not be translated are not
translated by mistake), and tell TravisCI to run them.

* ab/fix-poison-tests:
  travis-ci: add job to run tests with GETTEXT_POISON
  travis-ci: setup "prove cache" in "script" step
  tests: fix tests broken under GETTEXT_POISON=YesPlease
2017-06-04 10:20:56 +09:00
Junio C Hamano
16b4a48fec Merge branch 'ab/doc-replace-gmane-links' into maint
The Web interface to gmane news archive is long gone, even though
the articles are still accessible via NTTP.  Replace the links with
ones to public-inbox.org.  Because their message identification is
based on the actual message-id, it is likely that it will be easier
to migrate away from it if/when necessary.

* ab/doc-replace-gmane-links:
  doc: replace more gmane links
  doc: replace a couple of broken gmane links
2017-06-04 10:20:56 +09:00
Junio C Hamano
9102f423f1 Merge branch 'ab/aix-needs-compat-regex' into maint
Build fix.

* ab/aix-needs-compat-regex:
  config.mak.uname: set NO_REGEX=NeedsStartEnd on AIX
2017-06-04 10:20:56 +09:00
Junio C Hamano
19a23d6d83 Merge branch 'pw/rebase-i-regression-fix' into maint
Just the first one of three? new tests that follows up a regression
fix.

* pw/rebase-i-regression-fix:
  rebase -i: add missing newline to end of message
  rebase -i: silence stash apply
  rebase -i: fix reflog message
2017-06-04 10:20:55 +09:00
Adam Dinwoodie
0c79cee697 docs: fix formatting and grammar
When compiling the documentation, asciidoc thinks a backtick surrounded
by whitespace shouldn't be interpreted as marking the start or end of a
literal.  In most cases, that's useful behaviour, but in the git-pull
documentation it means asciidoc is failing to correctly detect which
text should be monospaced and which shouldn't.

To avoid this, remove the extraneous spaces from the text to be
monospaced.  It would also be possible to fix the formatting by
switching to asciidoc's ++ monospace format markers and still have the
space characters included in the monospace text, but the spaces aren't
necessary and not having them keeps the markup simpler.

Also include a minor grammar fix suggested by Jeff while we're changing
these lines.

Signed-off-by: Adam Dinwoodie <adam@dinwoodie.org>
Helped-by: Jeff King <peff@peff.net>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2017-06-02 14:10:57 +09:00
Junio C Hamano
8ba74bfd7c diff-tree: update stale in-code comments
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2017-06-02 11:34:15 +09:00
Tyler Brazier
f15e7cf5cc pull: ff --rebase --autostash works in dirty repo
When `git pull --rebase --autostash` in a dirty repository resulted in a
fast-forward, nothing was being autostashed and the pull failed. This
was due to a shortcut to avoid running rebase when we can fast-forward,
but autostash is ignored on that codepath.

Now we will only take the shortcut if autostash is not in effect.
Based on a few tests against the git.git repo, the shortcut does not
seem to give us significant performance benefits, on Linux at least.
Regardless, it is more important to be correct than to be fast.

Signed-off-by: Tyler Brazier <tyler@tylerbrazier.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2017-06-01 14:09:39 +09:00
Jonathan Nieder
bfbfc9a953 send-email: Net::SMTP::starttls was introduced in v2.34
We cannot rely on the starttls method being present in Net::SMTP until
c274b798e6881a941d941808c6d89966975cb8c8 (Merge branch 'ipv6_ssl' of
https://github.com/noxxi/perl-libnet into noxxi-ipv6_ssl, 2014-06-02),
which set the module version to 2.34.

This version was first shipped as part of perl in v5.21.5~169 (Update
libnet to CPAN version 3.01, 2014-10-10).

Noticed on an Ubuntu system with perl 5.18.2-2ubuntu1.1, which
provides Net::SMTP version 2.31. The error message is

  Can't locate object method "starttls" via package "Net::SMTP" at /usr/lib/git-core/git-send-email line 1410.

Reported-by: Brandon Williams <bmwill@google.com>
Reported-and-tested-by: Eric Biggers <ebiggers3@gmail.com>
Signed-off-by: Jonathan Nieder <jrnieder@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2017-06-01 11:23:35 +09:00
Andreas Heiduk
fb87327aee doc: rewrite description for rev-parse --short
`git rev-parse --short` is not a generic modifier but just a variant
of `--verify` and considers the given length only as a suggestion to
ensure uniqueness.

Signed-off-by: Andreas Heiduk <asheiduk@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2017-06-01 10:37:42 +09:00
Jeff King
2c9a2ae285 docs/config: mention protocol implications of url.insteadOf
If a URL rewrite switches the protocol to something
nonstandard (like "persistent-https" for "https"), the user
may be bitten by the fact that the default protocol
restrictions are different between the two. Let's drop a
note in insteadOf that points the user in the right
direction.

It would be nice if we could make this work out of the box,
but we can't without knowing the security implications of
the user's rewrite. Only the documentation for a particular
remote helper can advise one way or the other. Since we do
include the persistent-https helper in contrib/ (and since
it was the helper in the real-world case that inspired that
patch), let's also drop a note there.

Suggested-by: Elliott Cable <me@ell.io>
Signed-off-by: Jeff King <peff@peff.net>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2017-06-01 10:07:10 +09:00
Jeff King
a56eea28c4 remote: drop free_refspecs() function
We already have free_refspec(), a public function which does
the same thing as the static free_refspecs(). Let's just
keep one.  There are two minor differences between the
functions:

  1. free_refspecs() is a noop when the refspec argument is
     NULL. This probably doesn't matter in practice.  The
     nr_refspec parameter would presumably be 0 in that
     case, skipping the loop. And free(NULL) is explicitly
     OK. But it doesn't hurt for us to port this extra
     safety to free_refspec(), as one of the callers passes
     a funny "i+1" count.

  2. The order of arguments is reversed between the two
     functions. This patch uses the already-public order of
     free_refspec(), as it matches the argument order on the
     parsing side.

Signed-off-by: Jeff King <peff@peff.net>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2017-06-01 09:59:00 +09:00
Ævar Arnfjörð Bjarmason
66f5f6dca9 C style: use standard style for "TRANSLATORS" comments
Change all the "TRANSLATORS: [...]" comments in the C code to use the
regular Git coding style, and amend the style guide so that the
example there uses that style.

This custom style was necessary back in 2010 when the gettext support
was initially added, and was subsequently documented in commit
cbcfd4e3ea ("i18n: mention "TRANSLATORS:" marker in
Documentation/CodingGuidelines", 2014-04-18).

GNU xgettext hasn't had the parsing limitation that necessitated this
exception for almost 3 years. Since its 0.19 release on 2014-06-02
it's been able to recognize TRANSLATOR comments in the standard Git
comment syntax[1].

Usually we'd like to keep compatibility with software that's that
young, but in this case literally the only person who needs to be
using a gettext newer than 3 years old is Jiang Xin (the only person
who runs & commits "make pot" results), so I think in this case we can
make an exception.

This xgettext parsing feature was added after a thread on the Git
mailing list[2] which continued on the bug-gettext[3] list, but we
never subsequently changed our style & styleguide, do so.

There are already longstanding changes in git that use the standard
comment style & have their TRANSLATORS comments extracted properly
without getting the literal "*"'s mixed up in the text, as would
happen before xgettext 0.19.

Commit 7ff2683253 ("builtin-am: implement -i/--interactive",
2015-08-04) added one such comment, which in commit df0617bfa7 ("l10n:
git.pot: v2.6.0 round 1 (123 new, 41 removed)", 2015-09-05) got picked
up in the po/git.pot file with the right format, showing that Jiang
already runs a modern xgettext.

The xgettext parser does not handle the sort of non-standard comment
style that I'm amending here in sequencer.c, but that isn't standard
Git comment syntax anyway. With this change to sequencer.c & "make
pot" the comment in the pot file is now correct:

     #. TRANSLATORS: %s will be "revert", "cherry-pick" or
    -#. * "rebase -i".
    +#. "rebase -i".

1. http://git.savannah.gnu.org/cgit/gettext.git/commit/?id=10af7fe6bd
2. <2ce9ec406501d112e032c8208417f8100bed04c6.1397712142.git.worldhello.net@gmail.com>
   (https://public-inbox.org/git/2ce9ec406501d112e032c8208417f8100bed04c6.1397712142.git.worldhello.net@gmail.com/)
3. https://lists.gnu.org/archive/html/bug-gettext/2014-04/msg00016.html

Signed-off-by: Ævar Arnfjörð Bjarmason <avarab@gmail.com>
Acked-by: Jiang Xin <worldhello.net@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2017-05-31 08:01:42 +09:00
Jeff King
f3a2fffe06 am: handle "-h" argument earlier
If the user provides "-h" on the command line, then our
parse_options() invocation will show a usage message and
quit. But if "-h" is the only argument, the git wrapper
behaves specially: it ignores our RUN_SETUP flag and calls
cmd_am() without having done repository setup at all.  This
is due to 99caeed05 (Let 'git <command> -h' show usage
without a git dir, 2009-11-09).

Before cmd_am() calls parse_options(), though, it runs a few
other setup functions. One of these is am_state_init(),
which uses git_pathdup() to set up the default rebase-apply
path. But calling git_pathdup() when we haven't done
repository setup will fall back to using ".git". That's
mostly harmless (since we won't use the value anyway), but
is forbidden since b1ef400eec ("setup_git_env: avoid blind
fall-back to ".git"", 2016-10-20), and we now BUG().

We can't easily move that setup to after the parse_options()
call; the point is to set up defaults that are overwritten
by the option parsing. Instead, we'll detect the "-h" case
early and show the usage then. This matches the behavior of
other builtins which have a similar setup-ordering issue
(e.g., git-branch).

Signed-off-by: Jeff King <peff@peff.net>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2017-05-30 14:39:47 +09:00
Rikard Falkeborn
9ee4aa95db completion: add completions for git config commit
Add missing completions for git config:

* commit.cleanup
* commit.gpgSign
* commit.verbose

Signed-off-by: Rikard Falkeborn <rikard.falkeborn@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2017-05-30 13:29:38 +09:00
Sahil Dua
b8f354f294 branch test: fix invalid config key access
Fixes the test by changing "branch.s/s/dummy" to "branch.s/s.dummy" which is
the right way of accessing config key "branch.s/s.dummy". Purpose of
this test is to confirm that this key doesn't exist after the branch
"s/s" has been renamed to "s".

Earlier it was trying to access invalid config key and hence was getting
an error. However, this wasn't caught because we were expecting the
command to fail for other reason as mentioned above.

Signed-off-by: Sahil Dua <sahildua2305@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2017-05-29 13:18:43 +09:00
Ævar Arnfjörð Bjarmason
44e2ff09ce wildmatch test: remove redundant duplicate test
Remove a test line that's exactly the same as the preceding
line.

This was brought in in commit feabcc173b ("Integrate wildmatch to
git", 2012-10-15), these tests are originally copied from rsync.git,
but the duplicate line was never present there, so must have just
snuck in during integration with git by accident.

Signed-off-by: Ævar Arnfjörð Bjarmason <avarab@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2017-05-29 09:54:15 +09:00
Andreas Heiduk
ba746ff9c9 doc: filter-branch does not require re-export of vars
The function `set_ident` in `filter-branch` exported the variables
GIT_(AUTHOR|COMMITTER)_(NAME|EMAIL|DATE) at least since 6f6826c52b in 2007.
Therefore the filter scripts don't need to re-eport them again.

Signed-off-by: Andreas Heiduk <asheiduk@gmail.com>
Reviewed-by: Jeff King <peff@peff.net>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2017-05-29 08:53:38 +09:00
Jeff King
ef4fe5617e connect.c: fix leak in parse_one_symref_info()
If we successfully parse a symref value like
"HEAD:refs/heads/master", we add the result to a string
list. But because the string list is marked
STRING_LIST_INIT_DUP, the string list code will make a copy
of the string and add the copy.

This patch fixes it by adding the entry with
string_list_append_nodup(), which lets the string list take
ownership of our newly allocated string. There are two
alternatives that seem like they would work, but aren't the
right solution.

The first is to initialize the list with the "NODUP"
initializer. That would avoid the copy, but then the string
list would not realize that it owns the strings. When we
eventually call string_list_clear(), it would not free the
strings, causing a leak.

The second option would be to use the normal
string_list_append(), but free the local copy in our
function. We can't do this because the local copy actually
contains _two_ strings; the symref name and its target. We
point to the target pointer via the "util" field, and its
memory must last as long as the string list does.

You may also wonder whether it's safe to ever free the local
copy, since the target points into it. The answer is yes,
because we duplicate it in annotaate_refs_with_symref_info
before clearing the string list.

Signed-off-by: Jeff King <peff@peff.net>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2017-05-26 12:51:06 +09:00
SZEDER Gábor
449456ad47 docs/config.txt: fix indefinite article in core.fileMode description
Signed-off-by: SZEDER Gábor <szeder.dev@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2017-05-26 12:21:07 +09:00
Johannes Sixt
d9244ecf4f Windows: do not treat a path with backslashes as a remote's nick name
On Windows, the remote repository name in, e.g., `git fetch foo\bar`
is clearly not a nickname for a configured remote repository. However,
the function valid_remote_nick() does not account for backslashes.
Use is_dir_sep() to check for both slashes and backslashes on Windows.

This was discovered while playing with Duy's patches that warn after
fopen() failures. The functions that read the branches and remotes
files are protected by a valid_remote_nick() check. Without this
change, a Windows style absolute path is incorrectly regarded as
nickname and is concatenated to a prefix and used with fopen(). This
triggers warnings because a colon in a path name is not allowed:

C:\Temp\gittest>git fetch C:\Temp\gittest
warning: unable to access '.git/remotes/C:\Temp\gittest': Invalid argument
warning: unable to access '.git/branches/C:\Temp\gittest': Invalid argument
From C:\Temp\gittest
 * branch            HEAD       -> FETCH_HEAD

Signed-off-by: Johannes Sixt <j6t@kdbg.org>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2017-05-26 08:05:32 +09:00
Jeff King
30d005c020 diff: use blob path for blob/file diffs
When we diff a blob against a working tree file like:

  git diff HEAD:Makefile Makefile

we always use the working tree filename for both sides of
the diff. In most cases that's fine, as the two would be the
same anyway, as above. And until recently, we used the
"name" for the blob, not the path, which would have the
messy "HEAD:" on the beginning.

But when they don't match, like:

  git diff HEAD:old_path new_path

it makes sense to show both names.

This patch uses the blob's path field if it's available, and
otherwise falls back to using the filename (in preference to
the blob's name, which is likely to be garbage like a raw
sha1).

Signed-off-by: Jeff King <peff@peff.net>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2017-05-24 10:59:27 +09:00
Jeff King
158b06caee diff: use pending "path" if it is available
There's a subtle distinction between "name" and "path" for a
blob that we resolve: the name is what the user told us on
the command line, and the path is what we traversed when
finding the blob within a tree (if we did so).

When we diff blobs directly, we use "name", but "path" is
more likely to be useful to the user (it will find the
correct .gitattributes, and give them a saner diff header).

We still have to fall back to using the name for some cases
(i.e., any blob reference that isn't of the form tree:path).
That's the best we can do in such a case.

Signed-off-by: Jeff King <peff@peff.net>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2017-05-24 10:59:27 +09:00
Jeff King
d04ec74b17 diff: use the word "path" instead of "name" for blobs
The stuff_change() function makes diff_filespecs out of
blobs. The term we generally use for filespecs is "path",
not "name", so let's be consistent here.  That will make
things less confusing when the next patch starts caring
about the path/name distinction inside the pending object
array.

Signed-off-by: Jeff King <peff@peff.net>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2017-05-24 10:59:27 +09:00
Jeff King
42f5ba5bb6 diff: pass whole pending entry in blobinfo
When diffing blobs directly, git-diff picks the blobs out of
the rev_info's pending array and copies the relevant bits to
a custom "struct blobinfo". But the pending array entry
already has all of this information (and more, which we'll
use in future patches). Let's just pass the original entry
instead.

In practice, these two blobs are probably adjacent in the
revs->pending array, and we could just pass the whole array.
But the current code is careful to pick each blob out
separately and put it into another array, so we'll continue
to do so and make our own array-of-pointers.

Signed-off-by: Jeff King <peff@peff.net>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2017-05-24 10:59:27 +09:00
Jeff King
18f1ad7639 handle_revision_arg: record paths for pending objects
If the revision parser sees an argument like tree:path, we
parse it down to the correct blob (or tree), but throw away
the "path" portion. Let's ask get_sha1_with_context() to
record it, and pass it along in the pending array.

This will let programs like git-diff which rely on the
revision-parser show more accurate paths.

Note that the implementation is a little tricky; we have to
make sure we free oc.path in all code paths. For handle_dotdot(),
we can piggy-back on the existing cleanup-wrapper pattern.
The real work happens in handle_dotdot_1(), but the
handle_dotdot() wrapper makes sure that the path is freed no
matter how we exit the function (and for that reason we make
sure that the object_context struct is zero'd, so if we fail
to even get to the get_sha1_with_context() call, we just end
up calling free(NULL)).

Signed-off-by: Jeff King <peff@peff.net>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2017-05-24 10:59:27 +09:00
Jeff King
101dd4de16 handle_revision_arg: record modes for "a..b" endpoints
The "a..b" revision syntax was designed to handle commits,
so it doesn't bother to record any mode we find while
traversing a "tree:path" endpoint. These days "git diff" can
diff blobs using either "a:path..b:path" (with dots) or
"a:path b:path" (without), but the two behave
inconsistently, as the with-dots version fails to notice the
mode.

Let's teach the dot-dot range parser to record modes; it
doesn't cost us anything, and it makes this case work.

Signed-off-by: Jeff King <peff@peff.net>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2017-05-24 10:59:27 +09:00
Jeff King
74e89110a3 t4063: add tests of direct blob diffs
The git-diff command can directly compare two blobs (or a
blob and a file), but we don't test this at all. Let's add
some basic tests that reveal a few problems.

There are basically four interesting inputs:

  1. sha1 against sha1 (where diff has no information beyond
     the contents)

  2. tree:path against tree:path (where it can get
     information via get_sha1_with_context)

  3. Same as (2), but using the ".." range syntax

  4. tree:path against a filename

And beyond generating a sane diff, we care about a few
little bits: which paths they show in the diff header, and
whether they correctly pick up a mode change.

They should all be able to show a mode except for (1),
though note that case (3) is currently broken.

For the headers, we would ideally show the path within the
tree if we have it, making:

  git diff a:path b:path

look the same as:

  git diff a b -- path

We can't always do that (e.g., in the direct sha1/sha1 diff,
we have no path to show), in which case we should fall back
to the name that resolved to the blob (which is nonsense
from the repository's perspective, but is the best we can
do).

Aside from the fallback case in (1), none of the cases get
this right. Cases (2) and (3) always show the full
tree:path, even though we should be able to know just the
"path" portion.

Case (4) picks up the filename path, but assigns it to
_both_ sides of the diff. So this works for:

  git diff tree:path path

but not for:

  git diff tree:other_path path

The appropriate tests are marked to expect failure.

Signed-off-by: Jeff King <peff@peff.net>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2017-05-24 10:59:27 +09:00