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Commit | Line | Data |
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baffc0e7 | 1 | #include "builtin.h" |
6683463e | 2 | #include "cache.h" |
b5039db6 | 3 | #include "commit.h" |
e5d1a4df | 4 | #include "parse-options.h" |
6683463e | 5 | |
53eda89b | 6 | static int show_merge_base(struct commit **rev, int rev_nr, int show_all) |
52cab8a0 | 7 | { |
53eda89b CC |
8 | struct commit_list *result; |
9 | ||
10 | result = get_merge_bases_many(rev[0], rev_nr - 1, rev + 1, 0); | |
52cab8a0 JS |
11 | |
12 | if (!result) | |
13 | return 1; | |
14 | ||
9585e406 | 15 | while (result) { |
52cab8a0 | 16 | printf("%s\n", sha1_to_hex(result->item->object.sha1)); |
9585e406 JH |
17 | if (!show_all) |
18 | return 0; | |
52cab8a0 | 19 | result = result->next; |
9585e406 | 20 | } |
52cab8a0 | 21 | |
9585e406 | 22 | return 0; |
6683463e LT |
23 | } |
24 | ||
e5d1a4df | 25 | static const char * const merge_base_usage[] = { |
aa8f98c1 | 26 | "git merge-base [-a|--all] [--octopus] <commit> <commit>...", |
a1e0ad78 | 27 | "git merge-base --independent <commit>...", |
e5d1a4df PH |
28 | NULL |
29 | }; | |
9585e406 | 30 | |
df57accb CC |
31 | static struct commit *get_commit_reference(const char *arg) |
32 | { | |
33 | unsigned char revkey[20]; | |
34 | struct commit *r; | |
35 | ||
36 | if (get_sha1(arg, revkey)) | |
37 | die("Not a valid object name %s", arg); | |
38 | r = lookup_commit_reference(revkey); | |
39 | if (!r) | |
40 | die("Not a valid commit name %s", arg); | |
41 | ||
42 | return r; | |
43 | } | |
44 | ||
a1e0ad78 | 45 | static int handle_octopus(int count, const char **args, int reduce, int show_all) |
aa8f98c1 JN |
46 | { |
47 | struct commit_list *revs = NULL; | |
48 | struct commit_list *result; | |
49 | int i; | |
50 | ||
a1e0ad78 JN |
51 | if (reduce) |
52 | show_all = 1; | |
53 | ||
54 | for (i = count - 1; i >= 0; i--) | |
aa8f98c1 | 55 | commit_list_insert(get_commit_reference(args[i]), &revs); |
a1e0ad78 JN |
56 | |
57 | result = reduce ? reduce_heads(revs) : get_octopus_merge_bases(revs); | |
aa8f98c1 JN |
58 | |
59 | if (!result) | |
60 | return 1; | |
61 | ||
62 | while (result) { | |
63 | printf("%s\n", sha1_to_hex(result->item->object.sha1)); | |
64 | if (!show_all) | |
65 | return 0; | |
66 | result = result->next; | |
67 | } | |
68 | ||
69 | return 0; | |
70 | } | |
71 | ||
71dfbf22 | 72 | int cmd_merge_base(int argc, const char **argv, const char *prefix) |
6683463e | 73 | { |
53eda89b CC |
74 | struct commit **rev; |
75 | int rev_nr = 0; | |
71dfbf22 | 76 | int show_all = 0; |
aa8f98c1 | 77 | int octopus = 0; |
a1e0ad78 | 78 | int reduce = 0; |
6683463e | 79 | |
e5d1a4df | 80 | struct option options[] = { |
aa8f98c1 JN |
81 | OPT_BOOLEAN('a', "all", &show_all, "output all common ancestors"), |
82 | OPT_BOOLEAN(0, "octopus", &octopus, "find ancestors for a single n-way merge"), | |
a1e0ad78 | 83 | OPT_BOOLEAN(0, "independent", &reduce, "list revs not reachable from others"), |
e5d1a4df PH |
84 | OPT_END() |
85 | }; | |
53eda89b | 86 | |
e5d1a4df | 87 | git_config(git_default_config, NULL); |
37782920 | 88 | argc = parse_options(argc, argv, prefix, options, merge_base_usage, 0); |
a1e0ad78 | 89 | if (!octopus && !reduce && argc < 2) |
e5d1a4df | 90 | usage_with_options(merge_base_usage, options); |
a1e0ad78 JN |
91 | if (reduce && (show_all || octopus)) |
92 | die("--independent cannot be used with other options"); | |
aa8f98c1 | 93 | |
a1e0ad78 JN |
94 | if (octopus || reduce) |
95 | return handle_octopus(argc, argv, reduce, show_all); | |
aa8f98c1 | 96 | |
e5d1a4df PH |
97 | rev = xmalloc(argc * sizeof(*rev)); |
98 | while (argc-- > 0) | |
99 | rev[rev_nr++] = get_commit_reference(*argv++); | |
53eda89b | 100 | return show_merge_base(rev, rev_nr, show_all); |
6683463e | 101 | } |