mirror of
https://github.com/git/git.git
synced 2024-05-28 22:06:15 +02:00
aa8f98c1bf
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>
93 lines
2.0 KiB
C
93 lines
2.0 KiB
C
#include "builtin.h"
|
|
#include "cache.h"
|
|
#include "commit.h"
|
|
#include "parse-options.h"
|
|
|
|
static int show_merge_base(struct commit **rev, int rev_nr, int show_all)
|
|
{
|
|
struct commit_list *result;
|
|
|
|
result = get_merge_bases_many(rev[0], rev_nr - 1, rev + 1, 0);
|
|
|
|
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;
|
|
}
|
|
|
|
static const char * const merge_base_usage[] = {
|
|
"git merge-base [-a|--all] [--octopus] <commit> <commit>...",
|
|
NULL
|
|
};
|
|
|
|
static struct commit *get_commit_reference(const char *arg)
|
|
{
|
|
unsigned char revkey[20];
|
|
struct commit *r;
|
|
|
|
if (get_sha1(arg, revkey))
|
|
die("Not a valid object name %s", arg);
|
|
r = lookup_commit_reference(revkey);
|
|
if (!r)
|
|
die("Not a valid commit name %s", 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, "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 (!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++);
|
|
return show_merge_base(rev, rev_nr, show_all);
|
|
}
|