[thirdparty/git.git] / builtin-describe.c

#include "cache.h"
#include "commit.h"
#include "tag.h"
#include "refs.h"
#include "builtin.h"
#include "exec_cmd.h"
#include "parse-options.h"

#define SEEN		(1u<<0)
#define MAX_TAGS	(FLAG_BITS - 1)

static const char * const describe_usage[] = {
	"git describe [options] <committish>*",
	NULL
};

static int debug;	/* Display lots of verbose info */
static int all;	/* Default to annotated tags only */
static int tags;	/* But allow any tags if --tags is specified */
static int longformat;
static int abbrev = DEFAULT_ABBREV;
static int max_candidates = 10;
static const char *pattern;
static int always;

struct commit_name {
	struct tag *tag;
	int prio; /* annotated tag = 2, tag = 1, head = 0 */
	unsigned char sha1[20];
	char path[FLEX_ARRAY]; /* more */
};
static const char *prio_names[] = {
	"head", "lightweight", "annotated",
};

static void add_to_known_names(const char *path,
			       struct commit *commit,
			       int prio,
			       const unsigned char *sha1)
{
	struct commit_name *e = commit->util;
	if (!e || e->prio < prio) {
		size_t len = strlen(path)+1;
		free(e);
		e = xmalloc(sizeof(struct commit_name) + len);
		e->tag = NULL;
		e->prio = prio;
		hashcpy(e->sha1, sha1);
		memcpy(e->path, path, len);
		commit->util = e;
	}
}

static int get_name(const char *path, const unsigned char *sha1, int flag, void *cb_data)
{
	int might_be_tag = !prefixcmp(path, "refs/tags/");
	struct commit *commit;
	struct object *object;
	unsigned char peeled[20];
	int is_tag, prio;

	if (!all && !might_be_tag)
		return 0;

	if (!peel_ref(path, peeled) && !is_null_sha1(peeled)) {
		commit = lookup_commit_reference_gently(peeled, 1);
		if (!commit)
			return 0;
		is_tag = !!hashcmp(sha1, commit->object.sha1);
	} else {
		commit = lookup_commit_reference_gently(sha1, 1);
		object = parse_object(sha1);
		if (!commit || !object)
			return 0;
		is_tag = object->type == OBJ_TAG;
	}

	/* If --all, then any refs are used.
	 * If --tags, then any tags are used.
	 * Otherwise only annotated tags are used.
	 */
	if (might_be_tag) {
		if (is_tag)
			prio = 2;
		else
			prio = 1;

		if (pattern && fnmatch(pattern, path + 10, 0))
			prio = 0;
	}
	else
		prio = 0;

	if (!all) {
		if (!prio)
			return 0;
		if (!tags && prio < 2)
			return 0;
	}
	add_to_known_names(all ? path + 5 : path + 10, commit, prio, sha1);
	return 0;
}

struct possible_tag {
	struct commit_name *name;
	int depth;
	int found_order;
	unsigned flag_within;
};

static int compare_pt(const void *a_, const void *b_)
{
	struct possible_tag *a = (struct possible_tag *)a_;
	struct possible_tag *b = (struct possible_tag *)b_;
	if (a->name->prio != b->name->prio)
		return b->name->prio - a->name->prio;
	if (a->depth != b->depth)
		return a->depth - b->depth;
	if (a->found_order != b->found_order)
		return a->found_order - b->found_order;
	return 0;
}

static unsigned long finish_depth_computation(
	struct commit_list **list,
	struct possible_tag *best)
{
	unsigned long seen_commits = 0;
	while (*list) {
		struct commit *c = pop_commit(list);
		struct commit_list *parents = c->parents;
		seen_commits++;
		if (c->object.flags & best->flag_within) {
			struct commit_list *a = *list;
			while (a) {
				struct commit *i = a->item;
				if (!(i->object.flags & best->flag_within))
					break;
				a = a->next;
			}
			if (!a)
				break;
		} else
			best->depth++;
		while (parents) {
			struct commit *p = parents->item;
			parse_commit(p);
			if (!(p->object.flags & SEEN))
				insert_by_date(p, list);
			p->object.flags |= c->object.flags;
			parents = parents->next;
		}
	}
	return seen_commits;
}

static void display_name(struct commit_name *n)
{
	if (n->prio == 2 && !n->tag) {
		n->tag = lookup_tag(n->sha1);
		if (!n->tag || parse_tag(n->tag) || !n->tag->tag)
			die("annotated tag %s not available", n->path);
		if (strcmp(n->tag->tag, n->path))
			warning("tag '%s' is really '%s' here", n->tag->tag, n->path);
	}

	if (n->tag)
		printf("%s", n->tag->tag);
	else
		printf("%s", n->path);
}

static void show_suffix(int depth, const unsigned char *sha1)
{
	printf("-%d-g%s", depth, find_unique_abbrev(sha1, abbrev));
}

static void describe(const char *arg, int last_one)
{
	unsigned char sha1[20];
	struct commit *cmit, *gave_up_on = NULL;
	struct commit_list *list;
	static int initialized = 0;
	struct commit_name *n;
	struct possible_tag all_matches[MAX_TAGS];
	unsigned int match_cnt = 0, annotated_cnt = 0, cur_match;
	unsigned long seen_commits = 0;

	if (get_sha1(arg, sha1))
		die("Not a valid object name %s", arg);
	cmit = lookup_commit_reference(sha1);
	if (!cmit)
		die("%s is not a valid '%s' object", arg, commit_type);

	if (!initialized) {
		initialized = 1;
		for_each_ref(get_name, NULL);
	}

	n = cmit->util;
	if (n) {
		/*
		 * Exact match to an existing ref.
		 */
		display_name(n);
		if (longformat)
			show_suffix(0, n->tag ? n->tag->tagged->sha1 : sha1);
		printf("\n");
		return;
	}

	if (!max_candidates)
		die("no tag exactly matches '%s'", sha1_to_hex(cmit->object.sha1));
	if (debug)
		fprintf(stderr, "searching to describe %s\n", arg);

	list = NULL;
	cmit->object.flags = SEEN;
	commit_list_insert(cmit, &list);
	while (list) {
		struct commit *c = pop_commit(&list);
		struct commit_list *parents = c->parents;
		seen_commits++;
		n = c->util;
		if (n) {
			if (match_cnt < max_candidates) {
				struct possible_tag *t = &all_matches[match_cnt++];
				t->name = n;
				t->depth = seen_commits - 1;
				t->flag_within = 1u << match_cnt;
				t->found_order = match_cnt;
				c->object.flags |= t->flag_within;
				if (n->prio == 2)
					annotated_cnt++;
			}
			else {
				gave_up_on = c;
				break;
			}
		}
		for (cur_match = 0; cur_match < match_cnt; cur_match++) {
			struct possible_tag *t = &all_matches[cur_match];
			if (!(c->object.flags & t->flag_within))
				t->depth++;
		}
		if (annotated_cnt && !list) {
			if (debug)
				fprintf(stderr, "finished search at %s\n",
					sha1_to_hex(c->object.sha1));
			break;
		}
		while (parents) {
			struct commit *p = parents->item;
			parse_commit(p);
			if (!(p->object.flags & SEEN))
				insert_by_date(p, &list);
			p->object.flags |= c->object.flags;
			parents = parents->next;
		}
	}

	if (!match_cnt) {
		const unsigned char *sha1 = cmit->object.sha1;
		if (always) {
			printf("%s\n", find_unique_abbrev(sha1, abbrev));
			return;
		}
		die("cannot describe '%s'", sha1_to_hex(sha1));
	}

	qsort(all_matches, match_cnt, sizeof(all_matches[0]), compare_pt);

	if (gave_up_on) {
		insert_by_date(gave_up_on, &list);
		seen_commits--;
	}
	seen_commits += finish_depth_computation(&list, &all_matches[0]);
	free_commit_list(list);

	if (debug) {
		for (cur_match = 0; cur_match < match_cnt; cur_match++) {
			struct possible_tag *t = &all_matches[cur_match];
			fprintf(stderr, " %-11s %8d %s\n",
				prio_names[t->name->prio],
				t->depth, t->name->path);
		}
		fprintf(stderr, "traversed %lu commits\n", seen_commits);
		if (gave_up_on) {
			fprintf(stderr,
				"more than %i tags found; listed %i most recent\n"
				"gave up search at %s\n",
				max_candidates, max_candidates,
				sha1_to_hex(gave_up_on->object.sha1));
		}
	}

	display_name(all_matches[0].name);
	if (abbrev)
		show_suffix(all_matches[0].depth, cmit->object.sha1);
	printf("\n");

	if (!last_one)
		clear_commit_marks(cmit, -1);
}

int cmd_describe(int argc, const char **argv, const char *prefix)
{
	int contains = 0;
	struct option options[] = {
		OPT_BOOLEAN(0, "contains",   &contains, "find the tag that comes after the commit"),
		OPT_BOOLEAN(0, "debug",      &debug, "debug search strategy on stderr"),
		OPT_BOOLEAN(0, "all",        &all, "use any ref in .git/refs"),
		OPT_BOOLEAN(0, "tags",       &tags, "use any tag in .git/refs/tags"),
		OPT_BOOLEAN(0, "long",       &longformat, "always use long format"),
		OPT__ABBREV(&abbrev),
		OPT_SET_INT(0, "exact-match", &max_candidates,
			    "only output exact matches", 0),
		OPT_INTEGER(0, "candidates", &max_candidates,
			    "consider <n> most recent tags (default: 10)"),
		OPT_STRING(0, "match",       &pattern, "pattern",
			   "only consider tags matching <pattern>"),
		OPT_BOOLEAN(0, "always",     &always,
			   "show abbreviated commit object as fallback"),
		OPT_END(),
	};

	argc = parse_options(argc, argv, options, describe_usage, 0);
	if (max_candidates < 0)
		max_candidates = 0;
	else if (max_candidates > MAX_TAGS)
		max_candidates = MAX_TAGS;

	save_commit_buffer = 0;

	if (longformat && abbrev == 0)
		die("--long is incompatible with --abbrev=0");

	if (contains) {
		const char **args = xmalloc((7 + argc) * sizeof(char*));
		int i = 0;
		args[i++] = "name-rev";
		args[i++] = "--name-only";
		args[i++] = "--no-undefined";
		if (always)
			args[i++] = "--always";
		if (!all) {
			args[i++] = "--tags";
			if (pattern) {
				char *s = xmalloc(strlen("--refs=refs/tags/") + strlen(pattern) + 1);
				sprintf(s, "--refs=refs/tags/%s", pattern);
				args[i++] = s;
			}
		}
		memcpy(args + i, argv, argc * sizeof(char*));
		args[i + argc] = NULL;
		return cmd_name_rev(i + argc, args, prefix);
	}

	if (argc == 0) {
		describe("HEAD", 1);
	} else {
		while (argc-- > 0) {
			describe(*argv++, argc == 0);
		}
	}
	return 0;
}
Commit	Line	Data
908e5310 LT	1	#include "cache.h"
908e5310 LT	2	#include "commit.h"
635d4134	3	#include "tag.h"
908e5310	4	#include "refs.h"
9a0eaf83	5	#include "builtin.h"
23615708	6	#include "exec_cmd.h"
166185be	7	#include "parse-options.h"
908e5310	8
8713ab30 SP	9	#define SEEN (1u<<0)
	10	#define MAX_TAGS (FLAG_BITS - 1)
	11
166185be	12	static const char * const describe_usage[] = {
1b1dd23f	13	"git describe [options] <committish>*",
166185be PH	14	NULL
166185be PH	15	};
908e5310	16
8713ab30	17	static int debug; /* Display lots of verbose info */
96f1e58f DR	18	static int all; /* Default to annotated tags only */
96f1e58f DR	19	static int tags; /* But allow any tags if --tags is specified */
518120e3	20	static int longformat;
2d9e7c9f	21	static int abbrev = DEFAULT_ABBREV;
8713ab30	22	static int max_candidates = 10;
cb2a1cc2	23	static const char *pattern;
da2478db	24	static int always;
908e5310	25
e7eb5034	26	struct commit_name {
212945d4	27	struct tag *tag;
64deb858	28	int prio; /* annotated tag = 2, tag = 1, head = 0 */
212945d4	29	unsigned char sha1[20];
5a2282de	30	char path[FLEX_ARRAY]; /* more */
e7eb5034	31	};
cf69fd49 SP	32	static const char *prio_names[] = {
	33	"head", "lightweight", "annotated",
	34	};
908e5310	35
64deb858	36	static void add_to_known_names(const char *path,
80dbae03	37	struct commit *commit,
212945d4 SP	38	int prio,
212945d4 SP	39	const unsigned char *sha1)
908e5310	40	{
e7eb5034 SP	41	struct commit_name *e = commit->util;
	42	if (!e \|\| e->prio < prio) {
	43	size_t len = strlen(path)+1;
	44	free(e);
	45	e = xmalloc(sizeof(struct commit_name) + len);
212945d4	46	e->tag = NULL;
e7eb5034	47	e->prio = prio;
212945d4	48	hashcpy(e->sha1, sha1);
e7eb5034 SP	49	memcpy(e->path, path, len);
e7eb5034 SP	50	commit->util = e;
908e5310	51	}
908e5310 LT	52	}
908e5310 LT	53
8da19775	54	static int get_name(const char path, const unsigned char sha1, int flag, void *cb_data)
908e5310	55	{
8a5a1884	56	int might_be_tag = !prefixcmp(path, "refs/tags/");
feededd0	57	struct commit *commit;
64deb858	58	struct object *object;
feededd0 SP	59	unsigned char peeled[20];
	60	int is_tag, prio;
	61
8a5a1884 SP	62	if (!all && !might_be_tag)
	63	return 0;
	64
feededd0 SP	65	if (!peel_ref(path, peeled) && !is_null_sha1(peeled)) {
	66	commit = lookup_commit_reference_gently(peeled, 1);
	67	if (!commit)
	68	return 0;
	69	is_tag = !!hashcmp(sha1, commit->object.sha1);
	70	} else {
	71	commit = lookup_commit_reference_gently(sha1, 1);
	72	object = parse_object(sha1);
	73	if (!commit \|\| !object)
	74	return 0;
	75	is_tag = object->type == OBJ_TAG;
	76	}
64deb858	77
2d9e7c9f JH	78	/* If --all, then any refs are used.
	79	* If --tags, then any tags are used.
	80	* Otherwise only annotated tags are used.
	81	*/
8a5a1884	82	if (might_be_tag) {
4ed19a3c	83	if (is_tag)
64deb858	84	prio = 2;
4ed19a3c	85	else
64deb858	86	prio = 1;
4ed19a3c MD	87
	88	if (pattern && fnmatch(pattern, path + 10, 0))
	89	prio = 0;
64deb858 JH	90	}
	91	else
	92	prio = 0;
	93
635d4134	94	if (!all) {
64deb858 JH	95	if (!prio)
	96	return 0;
	97	if (!tags && prio < 2)
635d4134	98	return 0;
635d4134	99	}
212945d4	100	add_to_known_names(all ? path + 5 : path + 10, commit, prio, sha1);
908e5310 LT	101	return 0;
	102	}
	103
80dbae03	104	struct possible_tag {
80dbae03	105	struct commit_name *name;
cf69fd49 SP	106	int depth;
cf69fd49 SP	107	int found_order;
8713ab30	108	unsigned flag_within;
80dbae03 SP	109	};
80dbae03 SP	110
cf69fd49 SP	111	static int compare_pt(const void a_, const void b_)
	112	{
	113	struct possible_tag a = (struct possible_tag )a_;
	114	struct possible_tag b = (struct possible_tag )b_;
	115	if (a->name->prio != b->name->prio)
	116	return b->name->prio - a->name->prio;
	117	if (a->depth != b->depth)
	118	return a->depth - b->depth;
	119	if (a->found_order != b->found_order)
	120	return a->found_order - b->found_order;
	121	return 0;
	122	}
	123
1b600e65 SP	124	static unsigned long finish_depth_computation(
	125	struct commit_list **list,
	126	struct possible_tag *best)
	127	{
	128	unsigned long seen_commits = 0;
	129	while (*list) {
	130	struct commit *c = pop_commit(list);
	131	struct commit_list *parents = c->parents;
	132	seen_commits++;
	133	if (c->object.flags & best->flag_within) {
	134	struct commit_list a = list;
	135	while (a) {
	136	struct commit *i = a->item;
	137	if (!(i->object.flags & best->flag_within))
	138	break;
	139	a = a->next;
	140	}
	141	if (!a)
	142	break;
	143	} else
	144	best->depth++;
	145	while (parents) {
	146	struct commit *p = parents->item;
	147	parse_commit(p);
	148	if (!(p->object.flags & SEEN))
	149	insert_by_date(p, list);
	150	p->object.flags \|= c->object.flags;
	151	parents = parents->next;
	152	}
	153	}
	154	return seen_commits;
	155	}
	156
212945d4 SP	157	static void display_name(struct commit_name *n)
	158	{
	159	if (n->prio == 2 && !n->tag) {
	160	n->tag = lookup_tag(n->sha1);
3167d725	161	if (!n->tag \|\| parse_tag(n->tag) \|\| !n->tag->tag)
212945d4 SP	162	die("annotated tag %s not available", n->path);
	163	if (strcmp(n->tag->tag, n->path))
	164	warning("tag '%s' is really '%s' here", n->tag->tag, n->path);
	165	}
	166
	167	if (n->tag)
	168	printf("%s", n->tag->tag);
	169	else
	170	printf("%s", n->path);
870cf7d6 JH	171	}
	172
	173	static void show_suffix(int depth, const unsigned char *sha1)
	174	{
	175	printf("-%d-g%s", depth, find_unique_abbrev(sha1, abbrev));
212945d4 SP	176	}
212945d4 SP	177
554fe20d	178	static void describe(const char *arg, int last_one)
908e5310	179	{
4c34a2c5	180	unsigned char sha1[20];
8713ab30	181	struct commit cmit, gave_up_on = NULL;
908e5310 LT	182	struct commit_list *list;
	183	static int initialized = 0;
	184	struct commit_name *n;
cf69fd49	185	struct possible_tag all_matches[MAX_TAGS];
8713ab30 SP	186	unsigned int match_cnt = 0, annotated_cnt = 0, cur_match;
8713ab30 SP	187	unsigned long seen_commits = 0;
908e5310	188
31fff305 DL	189	if (get_sha1(arg, sha1))
31fff305 DL	190	die("Not a valid object name %s", arg);
4c34a2c5 JH	191	cmit = lookup_commit_reference(sha1);
4c34a2c5 JH	192	if (!cmit)
31fff305	193	die("%s is not a valid '%s' object", arg, commit_type);
4c34a2c5	194
908e5310 LT	195	if (!initialized) {
908e5310 LT	196	initialized = 1;
cb5d709f	197	for_each_ref(get_name, NULL);
908e5310 LT	198	}
908e5310 LT	199
e7eb5034	200	n = cmit->util;
908e5310	201	if (n) {
870cf7d6 JH	202	/*
	203	* Exact match to an existing ref.
	204	*/
212945d4	205	display_name(n);
870cf7d6	206	if (longformat)
14d4642e	207	show_suffix(0, n->tag ? n->tag->tagged->sha1 : sha1);
212945d4	208	printf("\n");
908e5310 LT	209	return;
	210	}
	211
2c33f757 SP	212	if (!max_candidates)
2c33f757 SP	213	die("no tag exactly matches '%s'", sha1_to_hex(cmit->object.sha1));
8713ab30 SP	214	if (debug)
	215	fprintf(stderr, "searching to describe %s\n", arg);
	216
908e5310	217	list = NULL;
8713ab30	218	cmit->object.flags = SEEN;
908e5310 LT	219	commit_list_insert(cmit, &list);
908e5310 LT	220	while (list) {
80dbae03	221	struct commit *c = pop_commit(&list);
dccd0c2a	222	struct commit_list *parents = c->parents;
8713ab30	223	seen_commits++;
e7eb5034	224	n = c->util;
908e5310	225	if (n) {
8713ab30 SP	226	if (match_cnt < max_candidates) {
	227	struct possible_tag *t = &all_matches[match_cnt++];
	228	t->name = n;
	229	t->depth = seen_commits - 1;
	230	t->flag_within = 1u << match_cnt;
8a8169c0	231	t->found_order = match_cnt;
8713ab30 SP	232	c->object.flags \|= t->flag_within;
	233	if (n->prio == 2)
	234	annotated_cnt++;
	235	}
	236	else {
	237	gave_up_on = c;
	238	break;
	239	}
	240	}
	241	for (cur_match = 0; cur_match < match_cnt; cur_match++) {
	242	struct possible_tag *t = &all_matches[cur_match];
	243	if (!(c->object.flags & t->flag_within))
	244	t->depth++;
	245	}
	246	if (annotated_cnt && !list) {
	247	if (debug)
	248	fprintf(stderr, "finished search at %s\n",
	249	sha1_to_hex(c->object.sha1));
	250	break;
dccd0c2a SP	251	}
	252	while (parents) {
	253	struct commit *p = parents->item;
	254	parse_commit(p);
8713ab30	255	if (!(p->object.flags & SEEN))
dccd0c2a	256	insert_by_date(p, &list);
8713ab30	257	p->object.flags \|= c->object.flags;
dccd0c2a	258	parents = parents->next;
80dbae03 SP	259	}
	260	}
	261
da2478db JH	262	if (!match_cnt) {
	263	const unsigned char *sha1 = cmit->object.sha1;
	264	if (always) {
	265	printf("%s\n", find_unique_abbrev(sha1, abbrev));
	266	return;
	267	}
	268	die("cannot describe '%s'", sha1_to_hex(sha1));
	269	}
80dbae03	270
cf69fd49	271	qsort(all_matches, match_cnt, sizeof(all_matches[0]), compare_pt);
1b600e65 SP	272
	273	if (gave_up_on) {
	274	insert_by_date(gave_up_on, &list);
	275	seen_commits--;
	276	}
	277	seen_commits += finish_depth_computation(&list, &all_matches[0]);
	278	free_commit_list(list);
	279
8713ab30 SP	280	if (debug) {
	281	for (cur_match = 0; cur_match < match_cnt; cur_match++) {
	282	struct possible_tag *t = &all_matches[cur_match];
cf69fd49 SP	283	fprintf(stderr, " %-11s %8d %s\n",
cf69fd49 SP	284	prio_names[t->name->prio],
8713ab30 SP	285	t->depth, t->name->path);
	286	}
	287	fprintf(stderr, "traversed %lu commits\n", seen_commits);
	288	if (gave_up_on) {
	289	fprintf(stderr,
	290	"more than %i tags found; listed %i most recent\n"
	291	"gave up search at %s\n",
	292	max_candidates, max_candidates,
	293	sha1_to_hex(gave_up_on->object.sha1));
	294	}
80dbae03	295	}
212945d4 SP	296
	297	display_name(all_matches[0].name);
	298	if (abbrev)
870cf7d6	299	show_suffix(all_matches[0].depth, cmit->object.sha1);
212945d4	300	printf("\n");
80dbae03	301
8713ab30 SP	302	if (!last_one)
8713ab30 SP	303	clear_commit_marks(cmit, -1);
908e5310 LT	304	}
908e5310 LT	305
9a0eaf83	306	int cmd_describe(int argc, const char *argv, const char prefix)
908e5310	307	{
23615708	308	int contains = 0;
166185be PH	309	struct option options[] = {
	310	OPT_BOOLEAN(0, "contains", &contains, "find the tag that comes after the commit"),
	311	OPT_BOOLEAN(0, "debug", &debug, "debug search strategy on stderr"),
	312	OPT_BOOLEAN(0, "all", &all, "use any ref in .git/refs"),
	313	OPT_BOOLEAN(0, "tags", &tags, "use any tag in .git/refs/tags"),
518120e3	314	OPT_BOOLEAN(0, "long", &longformat, "always use long format"),
166185be	315	OPT__ABBREV(&abbrev),
2c33f757 SP	316	OPT_SET_INT(0, "exact-match", &max_candidates,
2c33f757 SP	317	"only output exact matches", 0),
166185be	318	OPT_INTEGER(0, "candidates", &max_candidates,
30ffa603 PH	319	"consider <n> most recent tags (default: 10)"),
	320	OPT_STRING(0, "match", &pattern, "pattern",
	321	"only consider tags matching <pattern>"),
da2478db JH	322	OPT_BOOLEAN(0, "always", &always,
da2478db JH	323	"show abbreviated commit object as fallback"),
166185be PH	324	OPT_END(),
166185be PH	325	};
908e5310	326
166185be	327	argc = parse_options(argc, argv, options, describe_usage, 0);
2c33f757 SP	328	if (max_candidates < 0)
2c33f757 SP	329	max_candidates = 0;
166185be PH	330	else if (max_candidates > MAX_TAGS)
166185be PH	331	max_candidates = MAX_TAGS;
4c34a2c5	332
8c599c74	333	save_commit_buffer = 0;
8112894d	334
518120e3 SB	335	if (longformat && abbrev == 0)
	336	die("--long is incompatible with --abbrev=0");
	337
23615708	338	if (contains) {
da2478db	339	const char *args = xmalloc((7 + argc) sizeof(char*));
3f7701a4 NP	340	int i = 0;
	341	args[i++] = "name-rev";
	342	args[i++] = "--name-only";
a2cf9f44	343	args[i++] = "--no-undefined";
da2478db JH	344	if (always)
da2478db JH	345	args[i++] = "--always";
30ffa603	346	if (!all) {
3f7701a4	347	args[i++] = "--tags";
30ffa603 PH	348	if (pattern) {
	349	char *s = xmalloc(strlen("--refs=refs/tags/") + strlen(pattern) + 1);
	350	sprintf(s, "--refs=refs/tags/%s", pattern);
	351	args[i++] = s;
	352	}
	353	}
3f7701a4 NP	354	memcpy(args + i, argv, argc * sizeof(char*));
	355	args[i + argc] = NULL;
	356	return cmd_name_rev(i + argc, args, prefix);
23615708 SP	357	}
23615708 SP	358
166185be	359	if (argc == 0) {
fec9ebf1	360	describe("HEAD", 1);
166185be PH	361	} else {
	362	while (argc-- > 0) {
	363	describe(*argv++, argc == 0);
fec9ebf1	364	}
166185be	365	}
908e5310 LT	366	return 0;
908e5310 LT	367	}