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authorJonathan Nieder <jrnieder@gmail.com>2010-08-17 07:01:15 (GMT)
committerJunio C Hamano <gitster@pobox.com>2010-08-18 21:02:03 (GMT)
commitaa8f98c1bfcf162e0bd23d20c34857940f2c2256 (patch)
tree7defce780500efc5e152b080e67143e22255829e /builtin/merge-base.c
parent1846e9edf6b9c8b8e84b96eab8753a1420b6b28d (diff)
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merge-base --octopus to mimic show-branch --merge-base
While show-branch --merge-base does not support more than MAX_REVS revs, git supports more with a different algorithm (v1.6.0-rc0~51^2~13, Introduce get_octopus_merge_bases() in commit.c, 2008-06-27). Expose that functionality. This should help scripts to catch up with builtin merge in supporting dodecapus. Signed-off-by: Jonathan Nieder <jrnieder@gmail.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
Diffstat (limited to 'builtin/merge-base.c')
-rw-r--r--builtin/merge-base.c35
1 files changed, 32 insertions, 3 deletions
diff --git a/builtin/merge-base.c b/builtin/merge-base.c
index 54e7ec2..c301286 100644
--- a/builtin/merge-base.c
+++ b/builtin/merge-base.c
@@ -23,7 +23,7 @@ static int show_merge_base(struct commit **rev, int rev_nr, int show_all)
}
static const char * const merge_base_usage[] = {
- "git merge-base [-a|--all] <commit> <commit>...",
+ "git merge-base [-a|--all] [--octopus] <commit> <commit>...",
NULL
};
@@ -41,21 +41,50 @@ static struct commit *get_commit_reference(const char *arg)
return r;
}
+static int show_octopus_merge_bases(int count, const char **args, int show_all)
+{
+ struct commit_list *revs = NULL;
+ struct commit_list *result;
+ int i;
+
+ for (i = count - 1; i >= 0; i++)
+ commit_list_insert(get_commit_reference(args[i]), &revs);
+ result = get_octopus_merge_bases(revs);
+
+ if (!result)
+ return 1;
+
+ while (result) {
+ printf("%s\n", sha1_to_hex(result->item->object.sha1));
+ if (!show_all)
+ return 0;
+ result = result->next;
+ }
+
+ return 0;
+}
+
int cmd_merge_base(int argc, const char **argv, const char *prefix)
{
struct commit **rev;
int rev_nr = 0;
int show_all = 0;
+ int octopus = 0;
struct option options[] = {
- OPT_BOOLEAN('a', "all", &show_all, "outputs all common ancestors"),
+ OPT_BOOLEAN('a', "all", &show_all, "output all common ancestors"),
+ OPT_BOOLEAN(0, "octopus", &octopus, "find ancestors for a single n-way merge"),
OPT_END()
};
git_config(git_default_config, NULL);
argc = parse_options(argc, argv, prefix, options, merge_base_usage, 0);
- if (argc < 2)
+ if (!octopus && argc < 2)
usage_with_options(merge_base_usage, options);
+
+ if (octopus)
+ return show_octopus_merge_bases(argc, argv, show_all);
+
rev = xmalloc(argc * sizeof(*rev));
while (argc-- > 0)
rev[rev_nr++] = get_commit_reference(*argv++);