8 static const char describe_usage[] =
9 "git-describe [--all] [--tags] [--abbrev=<n>] <committish>*";
11 static int all = 0; /* Default to annotated tags only */
12 static int tags = 0; /* But allow any tags if --tags is specified */
14 #define DEFAULT_ABBREV 8 /* maybe too many */
15 static int abbrev = DEFAULT_ABBREV;
17 static int names = 0, allocs = 0;
18 static struct commit_name {
19 const struct commit *commit;
21 } **name_array = NULL;
23 static struct commit_name *match(struct commit *cmit)
26 struct commit_name **p = name_array;
29 struct commit_name *n = *p++;
30 if (n->commit == cmit)
36 static void add_to_known_names(const char *path, const struct commit *commit)
39 int len = strlen(path)+1;
40 struct commit_name *name = xmalloc(sizeof(struct commit_name) + len);
42 name->commit = commit;
43 memcpy(name->path, path, len);
46 allocs = (idx + 50) * 3 / 2;
47 name_array = xrealloc(name_array, allocs*sizeof(*name_array));
49 name_array[idx] = name;
53 static int get_name(const char *path, const unsigned char *sha1)
55 struct commit *commit = lookup_commit_reference_gently(sha1, 1);
58 /* If --all, then any refs are used.
59 * If --tags, then any tags are used.
60 * Otherwise only annotated tags are used.
63 if (strncmp(path, "refs/tags/", 10))
66 struct object *object;
67 object = parse_object(sha1);
68 if (object->type != tag_type)
72 add_to_known_names(all ? path : path + 10, commit);
76 static int compare_names(const void *_a, const void *_b)
78 struct commit_name *a = *(struct commit_name **)_a;
79 struct commit_name *b = *(struct commit_name **)_b;
80 unsigned long a_date = a->commit->date;
81 unsigned long b_date = b->commit->date;
82 return (a_date > b_date) ? -1 : (a_date == b_date) ? 0 : 1;
85 static void describe(struct commit *cmit)
87 struct commit_list *list;
88 static int initialized = 0;
89 struct commit_name *n;
93 for_each_ref(get_name);
94 qsort(name_array, names, sizeof(*name_array), compare_names);
99 printf("%s\n", n->path);
104 commit_list_insert(cmit, &list);
106 struct commit *c = pop_most_recent_commit(&list, SEEN);
109 printf("%s-g%s\n", n->path,
110 find_unique_abbrev(cmit->object.sha1, abbrev));
116 int main(int argc, char **argv)
120 for (i = 1; i < argc; i++) {
121 const char *arg = argv[i];
122 unsigned char sha1[20];
125 if (!strcmp(arg, "--all")) {
129 if (!strcmp(arg, "--tags")) {
133 if (!strncmp(arg, "--abbrev=", 9)) {
134 abbrev = strtoul(arg + 9, NULL, 10);
135 if (abbrev < 4 || 40 <= abbrev)
136 abbrev = DEFAULT_ABBREV;
139 if (get_sha1(arg, sha1) < 0)
140 usage(describe_usage);
141 cmit = lookup_commit_reference(sha1);
143 usage(describe_usage);