summaryrefslogtreecommitdiff
path: root/merge-base.c
blob: 59f723f4047f831165b8d52ac13def398e663ac3 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
#include <stdlib.h>
#include "cache.h"
#include "commit.h"
 
static int show_all = 0;
 
static int merge_base(struct commit *rev1, struct commit *rev2)
{
	struct commit_list *result = get_merge_bases(rev1, rev2, 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 merge_base_usage[] =
"git-merge-base [--all] <commit-id> <commit-id>";
 
int main(int argc, char **argv)
{
	struct commit *rev1, *rev2;
	unsigned char rev1key[20], rev2key[20];
 
	setup_git_directory();
	git_config(git_default_config);
 
	while (1 < argc && argv[1][0] == '-') {
		char *arg = argv[1];
		if (!strcmp(arg, "-a") || !strcmp(arg, "--all"))
			show_all = 1;
		else
			usage(merge_base_usage);
		argc--; argv++;
	}
	if (argc != 3)
		usage(merge_base_usage);
	if (get_sha1(argv[1], rev1key))
		die("Not a valid object name %s", argv[1]);
	if (get_sha1(argv[2], rev2key))
		die("Not a valid object name %s", argv[2]);
	rev1 = lookup_commit_reference(rev1key);
	rev2 = lookup_commit_reference(rev2key);
	if (!rev1 || !rev2)
		return 1;
	return merge_base(rev1, rev2);
}