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describe --contains: default to HEAD when no commit-ish is given

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'git describe --contains' doesn't default to HEAD when no commit is
given, and it doesn't produce any output, not even an error:

  ~/src/git ((v2.5.0))$ ./git describe --contains
  ~/src/git ((v2.5.0))$ ./git describe --contains HEAD
  v2.5.0^0

Unlike other 'git describe' options, the '--contains' code path is
implemented by calling 'name-rev' with a bunch of options plus all the
commit-ishes that were passed to 'git describe'.  If no commit-ish was
present, then 'name-rev' got invoked with none, which then leads to the
behavior illustrated above.

Porcelain commands usually default to HEAD when no commit-ish is given,
and 'git describe' already does so in all other cases, so it should do
so with '--contains' as well.

Pass HEAD to 'name-rev' when no commit-ish is given on the command line
to make '--contains' behave consistently with other 'git describe'
options.  While at it, use argv_array_pushv() instead of the loop to
pass commit-ishes to 'git name-rev'.

'git describe's short help already indicates that the commit-ish is
optional, but the synopsis in the man page doesn't, so update it
accordingly as well.

Signed-off-by: SZEDER Gábor <szeder@ira.uka.de>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
This commit is contained in:
SZEDER Gábor 2015-08-24 18:15:18 +02:00 committed by Junio C Hamano
parent 282616c72d
commit 2bd07065c3
3 changed files with 14 additions and 6 deletions
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4
Documentation/git-describe.txt
View File

@ -9,7 +9,7 @@ git-describe - Show the most recent tag that is reachable from a commit
SYNOPSIS
--------
[verse]
'git describe' [--all] [--tags] [--contains] [--abbrev=<n>] <commit-ish>...
'git describe' [--all] [--tags] [--contains] [--abbrev=<n>] [<commit-ish>...]
'git describe' [--all] [--tags] [--contains] [--abbrev=<n>] --dirty[=<mark>]
DESCRIPTION
@ -27,7 +27,7 @@ see the -a and -s options to linkgit:git-tag[1].
OPTIONS
-------
<commit-ish>...::
Commit-ish object names to describe.
Commit-ish object names to describe. Defaults to HEAD if omitted.
--dirty[=<mark>]::
Describe the working tree.

8
builtin/describe.c
View File

@ -451,10 +451,10 @@ int cmd_describe(int argc, const char **argv, const char *prefix)
if (pattern)
argv_array_pushf(&args, "--refs=refs/tags/%s", pattern);
}
while (*argv) {
argv_array_push(&args, *argv);
argv++;
}
if (argc)
argv_array_pushv(&args, argv);
else
argv_array_push(&args, "HEAD");
return cmd_name_rev(args.argc, args.argv, prefix);
}

8
t/t6120-describe.sh
View File

@ -113,6 +113,14 @@ check_describe A-3-* --long HEAD^^2
check_describe c-7-* --tags
check_describe e-3-* --first-parent --tags
test_expect_success 'describe --contains defaults to HEAD without commit-ish' '
echo "A^0" >expect &&
git checkout A &&
test_when_finished "git checkout -" &&
git describe --contains >actual &&
test_cmp expect actual
'
: >err.expect
check_describe A --all A^0
test_expect_success 'no warning was displayed for A' '