[thirdparty/git.git] / builtin-show-ref.c

#include "cache.h"
#include "refs.h"
#include "object.h"
#include "tag.h"
#include "path-list.h"

static const char show_ref_usage[] = "git show-ref [-q|--quiet] [--verify] [-h|--head] [-d|--dereference] [-s|--hash[=<length>]] [--abbrev[=<length>]] [--tags] [--heads] [--] [pattern*] | --filter-invalid < ref-list";

static int deref_tags = 0, show_head = 0, tags_only = 0, heads_only = 0,
	found_match = 0, verify = 0, quiet = 0, hash_only = 0, abbrev = 0;
static const char **pattern;

static void show_one(const char *refname, const unsigned char *sha1)
{
	const char *hex = find_unique_abbrev(sha1, abbrev);
	if (hash_only)
		printf("%s\n", hex);
	else
		printf("%s %s\n", hex, refname);
}

static int show_ref(const char *refname, const unsigned char *sha1, int flag, void *cbdata)
{
	struct object *obj;
	const char *hex;
	unsigned char peeled[20];

	if (tags_only || heads_only) {
		int match;

		match = heads_only && !strncmp(refname, "refs/heads/", 11);
		match |= tags_only && !strncmp(refname, "refs/tags/", 10);
		if (!match)
			return 0;
	}
	if (pattern) {
		int reflen = strlen(refname);
		const char **p = pattern, *m;
		while ((m = *p++) != NULL) {
			int len = strlen(m);
			if (len > reflen)
				continue;
			if (memcmp(m, refname + reflen - len, len))
				continue;
			if (len == reflen)
				goto match;
			/* "--verify" requires an exact match */
			if (verify)
				continue;
			if (refname[reflen - len - 1] == '/')
				goto match;
		}
		return 0;
	}

match:
	found_match++;

	/* This changes the semantics slightly that even under quiet we
	 * detect and return error if the repository is corrupt and
	 * ref points at a nonexistent object.
	 */
	if (!has_sha1_file(sha1))
		die("git-show-ref: bad ref %s (%s)", refname,
		    sha1_to_hex(sha1));

	if (quiet)
		return 0;

	show_one(refname, sha1);

	if (!deref_tags)
		return 0;

	if ((flag & REF_ISPACKED) && !peel_ref(refname, peeled)) {
		if (!is_null_sha1(peeled)) {
			hex = find_unique_abbrev(peeled, abbrev);
			printf("%s %s^{}\n", hex, refname);
		}
	}
	else {
		obj = parse_object(sha1);
		if (!obj)
			die("git-show-ref: bad ref %s (%s)", refname,
			    sha1_to_hex(sha1));
		if (obj->type == OBJ_TAG) {
			obj = deref_tag(obj, refname, 0);
			hex = find_unique_abbrev(obj->sha1, abbrev);
			printf("%s %s^{}\n", hex, refname);
		}
	}
	return 0;
}

static int add_existing(const char *refname, const unsigned char *sha1, int flag, void *cbdata)
{
	struct path_list *list = (struct path_list *)cbdata;
	path_list_insert(refname, list);
	return 0;
}

/*
 * read "^(?:<anything>\s)?<refname>(?:\^\{\})?$" from the standard input,
 * and
 * (1) strip "^{}" at the end of line if any;
 * (2) ignore if match is provided and does not head-match refname;
 * (3) warn if refname is not a well-formed refname and skip;
 * (4) ignore if refname is a ref that exists in the local repository;
 * (5) otherwise output the line.
 */
static int exclude_existing(const char *match)
{
	static struct path_list existing_refs = { NULL, 0, 0, 0 };
	char buf[1024];
	int matchlen = match ? strlen(match) : 0;

	for_each_ref(add_existing, &existing_refs);
	while (fgets(buf, sizeof(buf), stdin)) {
		int len = strlen(buf);
		char *ref;
		if (len > 0 && buf[len - 1] == '\n')
			buf[--len] = '\0';
		if (!strcmp(buf + len - 3, "^{}")) {
			len -= 3;
			buf[len] = '\0';
		}
		for (ref = buf + len; buf < ref; ref--)
			if (isspace(ref[-1]))
				break;
		if (match) {
			int reflen = buf + len - ref;
			if (reflen < matchlen)
				continue;
			if (strncmp(ref, match, matchlen))
				continue;
		}
		if (check_ref_format(ref)) {
			fprintf(stderr, "warning: ref '%s' ignored\n", ref);
			continue;
		}
		if (!path_list_has_path(&existing_refs, ref)) {
			printf("%s\n", buf);
		}
	}
	return 0;
}

int cmd_show_ref(int argc, const char **argv, const char *prefix)
{
	int i;

	for (i = 1; i < argc; i++) {
		const char *arg = argv[i];
		if (*arg != '-') {
			pattern = argv + i;
			break;
		}
		if (!strcmp(arg, "--")) {
			pattern = argv + i + 1;
			if (!*pattern)
				pattern = NULL;
			break;
		}
		if (!strcmp(arg, "-q") || !strcmp(arg, "--quiet")) {
			quiet = 1;
			continue;
		}
		if (!strcmp(arg, "-h") || !strcmp(arg, "--head")) {
			show_head = 1;
			continue;
		}
		if (!strcmp(arg, "-d") || !strcmp(arg, "--dereference")) {
			deref_tags = 1;
			continue;
		}
		if (!strcmp(arg, "-s") || !strcmp(arg, "--hash")) {
			hash_only = 1;
			continue;
		}
		if (!strncmp(arg, "--hash=", 7) ||
		    (!strncmp(arg, "--abbrev", 8) &&
		     (arg[8] == '=' || arg[8] == '\0'))) {
			if (arg[2] != 'h' && !arg[8])
				/* --abbrev only */
				abbrev = DEFAULT_ABBREV;
			else {
				/* --hash= or --abbrev= */
				char *end;
				if (arg[2] == 'h') {
					hash_only = 1;
					arg += 7;
				}
				else
					arg += 9;
				abbrev = strtoul(arg, &end, 10);
				if (*end || abbrev > 40)
					usage(show_ref_usage);
				if (abbrev < MINIMUM_ABBREV)
					abbrev = MINIMUM_ABBREV;
			}
			continue;
		}
		if (!strcmp(arg, "--verify")) {
			verify = 1;
			continue;
		}
		if (!strcmp(arg, "--tags")) {
			tags_only = 1;
			continue;
		}
		if (!strcmp(arg, "--heads")) {
			heads_only = 1;
			continue;
		}
		if (!strcmp(arg, "--exclude-existing"))
			return exclude_existing(NULL);
		if (!strncmp(arg, "--exclude-existing=", 19))
			return exclude_existing(arg + 19);
		usage(show_ref_usage);
	}

	if (verify) {
		unsigned char sha1[20];

		while (*pattern) {
			if (!strncmp(*pattern, "refs/", 5) &&
			    resolve_ref(*pattern, sha1, 1, NULL)) {
				if (!quiet)
					show_one(*pattern, sha1);
			}
			else if (!quiet)
				die("'%s' - not a valid ref", *pattern);
			else
				return 1;
			pattern++;
		}
		return 0;
	}

	if (show_head)
		head_ref(show_ref, NULL);
	for_each_ref(show_ref, NULL);
	if (!found_match) {
		if (verify && !quiet)
			die("No match");
		return 1;
	}
	return 0;
}
Commit	Line	Data
358ddb62 LT	1	#include "cache.h"
	2	#include "refs.h"
	3	#include "object.h"
	4	#include "tag.h"
ed9f7c95	5	#include "path-list.h"
358ddb62	6
ed9f7c95	7	static const char show_ref_usage[] = "git show-ref [-q\|--quiet] [--verify] [-h\|--head] [-d\|--dereference] [-s\|--hash[=<length>]] [--abbrev[=<length>]] [--tags] [--heads] [--] [pattern*] \| --filter-invalid < ref-list";
358ddb62	8
c40abef8	9	static int deref_tags = 0, show_head = 0, tags_only = 0, heads_only = 0,
2eaf2224	10	found_match = 0, verify = 0, quiet = 0, hash_only = 0, abbrev = 0;
358ddb62 LT	11	static const char **pattern;
358ddb62 LT	12
64fe031a JH	13	static void show_one(const char refname, const unsigned char sha1)
	14	{
	15	const char *hex = find_unique_abbrev(sha1, abbrev);
	16	if (hash_only)
	17	printf("%s\n", hex);
	18	else
	19	printf("%s %s\n", hex, refname);
	20	}
	21
eaf12a8c	22	static int show_ref(const char refname, const unsigned char sha1, int flag, void *cbdata)
358ddb62 LT	23	{
358ddb62 LT	24	struct object *obj;
2eaf2224	25	const char *hex;
cf0adba7	26	unsigned char peeled[20];
358ddb62 LT	27
	28	if (tags_only \|\| heads_only) {
	29	int match;
	30
	31	match = heads_only && !strncmp(refname, "refs/heads/", 11);
	32	match \|= tags_only && !strncmp(refname, "refs/tags/", 10);
	33	if (!match)
	34	return 0;
	35	}
	36	if (pattern) {
	37	int reflen = strlen(refname);
	38	const char *p = pattern, m;
	39	while ((m = *p++) != NULL) {
	40	int len = strlen(m);
	41	if (len > reflen)
	42	continue;
	43	if (memcmp(m, refname + reflen - len, len))
	44	continue;
	45	if (len == reflen)
	46	goto match;
	47	/* "--verify" requires an exact match */
	48	if (verify)
	49	continue;
	50	if (refname[reflen - len - 1] == '/')
	51	goto match;
	52	}
	53	return 0;
	54	}
	55
	56	match:
	57	found_match++;
cf0adba7 JH	58
	59	/* This changes the semantics slightly that even under quiet we
	60	* detect and return error if the repository is corrupt and
	61	* ref points at a nonexistent object.
	62	*/
	63	if (!has_sha1_file(sha1))
	64	die("git-show-ref: bad ref %s (%s)", refname,
	65	sha1_to_hex(sha1));
	66
358ddb62 LT	67	if (quiet)
358ddb62 LT	68	return 0;
2eaf2224	69
64fe031a	70	show_one(refname, sha1);
cf0adba7 JH	71
	72	if (!deref_tags)
	73	return 0;
	74
	75	if ((flag & REF_ISPACKED) && !peel_ref(refname, peeled)) {
f4204ab9 JH	76	if (!is_null_sha1(peeled)) {
	77	hex = find_unique_abbrev(peeled, abbrev);
	78	printf("%s %s^{}\n", hex, refname);
	79	}
358ddb62	80	}
cf0adba7 JH	81	else {
	82	obj = parse_object(sha1);
	83	if (!obj)
	84	die("git-show-ref: bad ref %s (%s)", refname,
	85	sha1_to_hex(sha1));
	86	if (obj->type == OBJ_TAG) {
	87	obj = deref_tag(obj, refname, 0);
	88	hex = find_unique_abbrev(obj->sha1, abbrev);
	89	printf("%s %s^{}\n", hex, refname);
	90	}
	91	}
358ddb62 LT	92	return 0;
	93	}
	94
ed9f7c95 JH	95	static int add_existing(const char refname, const unsigned char sha1, int flag, void *cbdata)
	96	{
	97	struct path_list list = (struct path_list )cbdata;
	98	path_list_insert(refname, list);
	99	return 0;
	100	}
	101
	102	/*
	103	* read "^(?:<anything>\s)?<refname>(?:\^\{\})?$" from the standard input,
	104	* and
	105	* (1) strip "^{}" at the end of line if any;
	106	* (2) ignore if match is provided and does not head-match refname;
	107	* (3) warn if refname is not a well-formed refname and skip;
	108	* (4) ignore if refname is a ref that exists in the local repository;
	109	* (5) otherwise output the line.
	110	*/
	111	static int exclude_existing(const char *match)
	112	{
	113	static struct path_list existing_refs = { NULL, 0, 0, 0 };
	114	char buf[1024];
	115	int matchlen = match ? strlen(match) : 0;
	116
	117	for_each_ref(add_existing, &existing_refs);
	118	while (fgets(buf, sizeof(buf), stdin)) {
	119	int len = strlen(buf);
	120	char *ref;
	121	if (len > 0 && buf[len - 1] == '\n')
	122	buf[--len] = '\0';
	123	if (!strcmp(buf + len - 3, "^{}")) {
	124	len -= 3;
	125	buf[len] = '\0';
	126	}
	127	for (ref = buf + len; buf < ref; ref--)
	128	if (isspace(ref[-1]))
	129	break;
	130	if (match) {
	131	int reflen = buf + len - ref;
	132	if (reflen < matchlen)
	133	continue;
	134	if (strncmp(ref, match, matchlen))
	135	continue;
	136	}
	137	if (check_ref_format(ref)) {
	138	fprintf(stderr, "warning: ref '%s' ignored\n", ref);
	139	continue;
	140	}
	141	if (!path_list_has_path(&existing_refs, ref)) {
	142	printf("%s\n", buf);
	143	}
	144	}
	145	return 0;
	146	}
	147
358ddb62 LT	148	int cmd_show_ref(int argc, const char *argv, const char prefix)
	149	{
	150	int i;
	151
	152	for (i = 1; i < argc; i++) {
	153	const char *arg = argv[i];
	154	if (*arg != '-') {
	155	pattern = argv + i;
	156	break;
	157	}
	158	if (!strcmp(arg, "--")) {
	159	pattern = argv + i + 1;
	160	if (!*pattern)
	161	pattern = NULL;
	162	break;
	163	}
	164	if (!strcmp(arg, "-q") \|\| !strcmp(arg, "--quiet")) {
	165	quiet = 1;
	166	continue;
	167	}
	168	if (!strcmp(arg, "-h") \|\| !strcmp(arg, "--head")) {
	169	show_head = 1;
	170	continue;
	171	}
	172	if (!strcmp(arg, "-d") \|\| !strcmp(arg, "--dereference")) {
	173	deref_tags = 1;
	174	continue;
	175	}
c40abef8 CC	176	if (!strcmp(arg, "-s") \|\| !strcmp(arg, "--hash")) {
	177	hash_only = 1;
	178	continue;
	179	}
2eaf2224 JH	180	if (!strncmp(arg, "--hash=", 7) \|\|
	181	(!strncmp(arg, "--abbrev", 8) &&
	182	(arg[8] == '=' \|\| arg[8] == '\0'))) {
64fe031a	183	if (arg[2] != 'h' && !arg[8])
2eaf2224 JH	184	/* --abbrev only */
	185	abbrev = DEFAULT_ABBREV;
	186	else {
	187	/* --hash= or --abbrev= */
	188	char *end;
64fe031a	189	if (arg[2] == 'h') {
2eaf2224 JH	190	hash_only = 1;
	191	arg += 7;
	192	}
	193	else
	194	arg += 9;
	195	abbrev = strtoul(arg, &end, 10);
	196	if (*end \|\| abbrev > 40)
	197	usage(show_ref_usage);
	198	if (abbrev < MINIMUM_ABBREV)
	199	abbrev = MINIMUM_ABBREV;
	200	}
	201	continue;
	202	}
358ddb62 LT	203	if (!strcmp(arg, "--verify")) {
	204	verify = 1;
	205	continue;
	206	}
	207	if (!strcmp(arg, "--tags")) {
	208	tags_only = 1;
	209	continue;
	210	}
	211	if (!strcmp(arg, "--heads")) {
	212	heads_only = 1;
	213	continue;
	214	}
ed9f7c95 JH	215	if (!strcmp(arg, "--exclude-existing"))
	216	return exclude_existing(NULL);
	217	if (!strncmp(arg, "--exclude-existing=", 19))
	218	return exclude_existing(arg + 19);
358ddb62 LT	219	usage(show_ref_usage);
358ddb62 LT	220	}
26cdd1e7 JH	221
	222	if (verify) {
	223	unsigned char sha1[20];
	224
	225	while (*pattern) {
64fe031a JH	226	if (!strncmp(*pattern, "refs/", 5) &&
64fe031a JH	227	resolve_ref(*pattern, sha1, 1, NULL)) {
dd914299	228	if (!quiet)
64fe031a	229	show_one(*pattern, sha1);
dd914299	230	}
26cdd1e7 JH	231	else if (!quiet)
	232	die("'%s' - not a valid ref", *pattern);
	233	else
	234	return 1;
	235	pattern++;
	236	}
	237	return 0;
	238	}
	239
358ddb62	240	if (show_head)
eaf12a8c JH	241	head_ref(show_ref, NULL);
eaf12a8c JH	242	for_each_ref(show_ref, NULL);
358ddb62 LT	243	if (!found_match) {
	244	if (verify && !quiet)
	245	die("No match");
	246	return 1;
	247	}
	248	return 0;
	249	}