4 #include "parse-options.h"
6 static int show_merge_base(struct commit **rev, int rev_nr, int show_all)
8 struct commit_list *result;
10 result = get_merge_bases_many(rev[0], rev_nr - 1, rev + 1, 0);
16 printf("%s\n", sha1_to_hex(result->item->object.sha1));
19 result = result->next;
25 static const char * const merge_base_usage[] = {
26 "git merge-base [-a|--all] <commit> <commit>...",
30 static struct commit *get_commit_reference(const char *arg)
32 unsigned char revkey[20];
35 if (get_sha1(arg, revkey))
36 die("Not a valid object name %s", arg);
37 r = lookup_commit_reference(revkey);
39 die("Not a valid commit name %s", arg);
44 int cmd_merge_base(int argc, const char **argv, const char *prefix)
50 struct option options[] = {
51 OPT_BOOLEAN('a', "all", &show_all, "outputs all common ancestors"),
55 git_config(git_default_config, NULL);
56 argc = parse_options(argc, argv, prefix, options, merge_base_usage, 0);
58 usage_with_options(merge_base_usage, options);
59 rev = xmalloc(argc * sizeof(*rev));
61 rev[rev_nr++] = get_commit_reference(*argv++);
62 return show_merge_base(rev, rev_nr, show_all);