undef/git-commit-vandalism
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describe: fix --contains when a tag is given as input

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"git describe" takes a commit and gives it a name based on tags in
its neighbourhood.  The command does take a commit-ish but when
given a tag that points at a commit, it should dereference the tag
before computing the name for the commit.

As the whole processing is internally delegated to name-rev, if we
unwrap tags down to the underlying commit when invoking name-rev, it
will make the name-rev issue an error message based on the unwrapped
object name (i.e. either 40-hex object name, or "$tag^0") that is
different from what the end-user gave to the command when the commit
cannot be described.  Introduce an internal option --peel-tag to the
name-rev to tell it to unwrap a tag in its input from the command
line.

Signed-off-by: Junio C Hamano <gitster@pobox.com>
This commit is contained in:
Junio C Hamano 2013-07-18 14:46:51 -07:00
parent 118aa4acff
commit adfc1857bd
3 changed files with 30 additions and 2 deletions
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3
builtin/describe.c
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@ -446,7 +446,8 @@ int cmd_describe(int argc, const char **argv, const char *prefix)
struct argv_array args;
argv_array_init(&args);
argv_array_pushl(&args, "name-rev", "--name-only", "--no-undefined",
argv_array_pushl(&args, "name-rev",
"--peel-tag", "--name-only", "--no-undefined",
NULL);
if (always)
argv_array_push(&args, "--always");

17
builtin/name-rev.c
View File

@ -307,7 +307,7 @@ static void name_rev_line(char *p, struct name_ref_data *data)
int cmd_name_rev(int argc, const char **argv, const char *prefix)
{
struct object_array revs = OBJECT_ARRAY_INIT;
int all = 0, transform_stdin = 0, allow_undefined = 1, always = 0;
int all = 0, transform_stdin = 0, allow_undefined = 1, always = 0, peel_tag = 0;
struct name_ref_data data = { 0, 0, NULL };
struct option opts[] = {
OPT_BOOLEAN(0, "name-only", &data.name_only, N_("print only names (no SHA-1)")),
@ -320,6 +320,12 @@ int cmd_name_rev(int argc, const char **argv, const char *prefix)
OPT_BOOLEAN(0, "undefined", &allow_undefined, N_("allow to print `undefined` names")),
OPT_BOOLEAN(0, "always", &always,
N_("show abbreviated commit object as fallback")),
{
/* A Hidden OPT_BOOL */
OPTION_SET_INT, 0, "peel-tag", &peel_tag, NULL,
N_("dereference tags in the input (internal use)"),
PARSE_OPT_NOARG | PARSE_OPT_HIDDEN, NULL, 1,
},
OPT_END(),
};
@ -361,6 +367,15 @@ int cmd_name_rev(int argc, const char **argv, const char *prefix)
if (cutoff > commit->date)
cutoff = commit->date;
}
if (peel_tag) {
if (!commit) {
fprintf(stderr, "Could not get commit for %s. Skipping.\n",
*argv);
continue;
}
object = (struct object *)commit;
}
add_object_array(object, *argv, &revs);
}

12
t/t6120-describe.sh
View File

@ -186,4 +186,16 @@ test_expect_success 'name-rev with exact tags' '
test_cmp expect actual
'
test_expect_success 'describe --contains with the exact tags' '
echo "A^0" >expect &&
tag_object=$(git rev-parse refs/tags/A) &&
git describe --contains $tag_object >actual &&
test_cmp expect actual &&
echo "A^0" >expect &&
tagged_commit=$(git rev-parse "refs/tags/A^0") &&
git describe --contains $tagged_commit >actual &&
test_cmp expect actual
'
test_done