Skip to content

HTTPS clone URL

Subversion checkout URL

You can clone with HTTPS or Subversion.

Download ZIP
Fetching contributors…

Cannot retrieve contributors at this time

125 lines (101 sloc) 3.093 kb
#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[] = {
N_("git merge-base [-a|--all] <commit> <commit>..."),
N_("git merge-base [-a|--all] --octopus <commit>..."),
N_("git merge-base --independent <commit>..."),
N_("git merge-base --is-ancestor <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 handle_octopus(int count, const char **args, int reduce, int show_all)
{
struct commit_list *revs = NULL;
struct commit_list *result;
int i;
if (reduce)
show_all = 1;
for (i = count - 1; i >= 0; i--)
commit_list_insert(get_commit_reference(args[i]), &revs);
result = reduce ? reduce_heads(revs) : 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;
}
static int handle_is_ancestor(int argc, const char **argv)
{
struct commit *one, *two;
if (argc != 2)
die("--is-ancestor takes exactly two commits");
one = get_commit_reference(argv[0]);
two = get_commit_reference(argv[1]);
if (in_merge_bases(one, two))
return 0;
else
return 1;
}
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;
int reduce = 0;
int is_ancestor = 0;
struct option options[] = {
OPT_BOOLEAN('a', "all", &show_all, N_("output all common ancestors")),
OPT_BOOLEAN(0, "octopus", &octopus, N_("find ancestors for a single n-way merge")),
OPT_BOOLEAN(0, "independent", &reduce, N_("list revs not reachable from others")),
OPT_BOOLEAN(0, "is-ancestor", &is_ancestor,
N_("is the first one ancestor of the other?")),
OPT_END()
};
git_config(git_default_config, NULL);
argc = parse_options(argc, argv, prefix, options, merge_base_usage, 0);
if (!octopus && !reduce && argc < 2)
usage_with_options(merge_base_usage, options);
if (is_ancestor && (show_all | octopus | reduce))
die("--is-ancestor cannot be used with other options");
if (is_ancestor)
return handle_is_ancestor(argc, argv);
if (reduce && (show_all || octopus))
die("--independent cannot be used with other options");
if (octopus || reduce)
return handle_octopus(argc, argv, reduce, 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);
}
Jump to Line
Something went wrong with that request. Please try again.