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rev-parse: Add support for the ^! and ^@ syntax

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Those shorthands are explained in the rev-parse documentation but were not
actually supported by rev-parse itself.

gitk internally uses rev-parse to interpret its command line arguments, and
being able to use these "limit with parents" syntax is handy there.

Signed-off-by: Björn Steinbrink <B.Steinbrink@gmx.de>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
This commit is contained in:
Björn Steinbrink 2008-07-26 18:37:56 +02:00 committed by Junio C Hamano
parent 47c6ef1c8d
commit 2122f8b963
2 changed files with 34 additions and 0 deletions
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32
builtin-rev-parse.c
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@ -241,6 +241,36 @@ static int try_difference(const char *arg)
return 0;
}
static int try_parent_shorthands(const char *arg)
{
char *dotdot;
unsigned char sha1[20];
struct commit *commit;
struct commit_list *parents;
int parents_only;
if ((dotdot = strstr(arg, "^!")))
parents_only = 0;
else if ((dotdot = strstr(arg, "^@")))
parents_only = 1;
if (!dotdot || dotdot[2])
return 0;
*dotdot = 0;
if (get_sha1(arg, sha1))
return 0;
if (!parents_only)
show_rev(NORMAL, sha1, arg);
commit = lookup_commit_reference(sha1);
for (parents = commit->parents; parents; parents = parents->next)
show_rev(parents_only ? NORMAL : REVERSED,
parents->item->object.sha1, arg);
return 1;
}
static int parseopt_dump(const struct option *o, const char *arg, int unset)
{
struct strbuf *parsed = o->value;
@ -573,6 +603,8 @@ int cmd_rev_parse(int argc, const char **argv, const char *prefix)
/* Not a flag argument */
if (try_difference(arg))
continue;
if (try_parent_shorthands(arg))
continue;
name = arg;
type = NORMAL;
if (*arg == '^') {

2
t/t6101-rev-parse-parents.sh
View File

@ -28,6 +28,8 @@ test_expect_success 'final^1^2 != final^1^1' "test $(git rev-parse final^1^2) !=
test_expect_success 'final^1^3 not valid' "if git rev-parse --verify final^1^3; then false; else :; fi"
test_expect_success '--verify start2^1' 'test_must_fail git rev-parse --verify start2^1'
test_expect_success '--verify start2^0' 'git rev-parse --verify start2^0'
test_expect_success 'final^1^@ = final^1^1 final^1^2' "test \"$(git rev-parse final^1^@)\" = \"$(git rev-parse final^1^1 final^1^2)\""
test_expect_success 'final^1^! = final^1 ^final^1^1 ^final^1^2' "test \"$(git rev-parse final^1^\!)\" = \"$(git rev-parse final^1 ^final^1^1 ^final^1^2)\""
test_expect_success 'repack for next test' 'git repack -a -d'
test_expect_success 'short SHA-1 works' '