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

/*
 * Builtin "git tag"
 *
 * Copyright (c) 2007 Kristian Høgsberg <krh@redhat.com>,
 *                    Carlos Rica <jasampler@gmail.com>
 * Based on git-tag.sh and mktag.c by Linus Torvalds.
 */

#include "cache.h"
#include "builtin.h"
#include "refs.h"
#include "tag.h"
#include "run-command.h"
#include "parse-options.h"

static const char * const git_tag_usage[] = {
	"git tag [-a|-s|-u <key-id>] [-f] [-m <msg>|-F <file>] <tagname> [<head>]",
	"git tag -d <tagname>...",
	"git tag -l [-n[<num>]] [<pattern>]",
	"git tag -v <tagname>...",
	NULL
};

static char signingkey[1000];

struct tag_filter {
	const char *pattern;
	int lines;
};

#define PGP_SIGNATURE "-----BEGIN PGP SIGNATURE-----"

static int show_reference(const char *refname, const unsigned char *sha1,
			  int flag, void *cb_data)
{
	struct tag_filter *filter = cb_data;

	if (!fnmatch(filter->pattern, refname, 0)) {
		int i;
		unsigned long size;
		enum object_type type;
		char *buf, *sp, *eol;
		size_t len;

		if (!filter->lines) {
			printf("%s\n", refname);
			return 0;
		}
		printf("%-15s ", refname);

		buf = read_sha1_file(sha1, &type, &size);
		if (!buf || !size)
			return 0;

		/* skip header */
		sp = strstr(buf, "\n\n");
		if (!sp) {
			free(buf);
			return 0;
		}
		/* only take up to "lines" lines, and strip the signature */
		for (i = 0, sp += 2;
				i < filter->lines && sp < buf + size &&
				prefixcmp(sp, PGP_SIGNATURE "\n");
				i++) {
			if (i)
				printf("\n    ");
			eol = memchr(sp, '\n', size - (sp - buf));
			len = eol ? eol - sp : size - (sp - buf);
			fwrite(sp, len, 1, stdout);
			if (!eol)
				break;
			sp = eol + 1;
		}
		putchar('\n');
		free(buf);
	}

	return 0;
}

static int list_tags(const char *pattern, int lines)
{
	struct tag_filter filter;

	if (pattern == NULL)
		pattern = "*";

	filter.pattern = pattern;
	filter.lines = lines;

	for_each_tag_ref(show_reference, (void *) &filter);

	return 0;
}

typedef int (*each_tag_name_fn)(const char *name, const char *ref,
				const unsigned char *sha1);

static int for_each_tag_name(const char **argv, each_tag_name_fn fn)
{
	const char **p;
	char ref[PATH_MAX];
	int had_error = 0;
	unsigned char sha1[20];

	for (p = argv; *p; p++) {
		if (snprintf(ref, sizeof(ref), "refs/tags/%s", *p)
					>= sizeof(ref)) {
			error("tag name too long: %.*s...", 50, *p);
			had_error = 1;
			continue;
		}
		if (!resolve_ref(ref, sha1, 1, NULL)) {
			error("tag '%s' not found.", *p);
			had_error = 1;
			continue;
		}
		if (fn(*p, ref, sha1))
			had_error = 1;
	}
	return had_error;
}

static int delete_tag(const char *name, const char *ref,
				const unsigned char *sha1)
{
	if (delete_ref(ref, sha1))
		return 1;
	printf("Deleted tag '%s'\n", name);
	return 0;
}

static int verify_tag(const char *name, const char *ref,
				const unsigned char *sha1)
{
	const char *argv_verify_tag[] = {"git-verify-tag",
					"-v", "SHA1_HEX", NULL};
	argv_verify_tag[2] = sha1_to_hex(sha1);

	if (run_command_v_opt(argv_verify_tag, 0))
		return error("could not verify the tag '%s'", name);
	return 0;
}

static int do_sign(struct strbuf *buffer)
{
	struct child_process gpg;
	const char *args[4];
	char *bracket;
	int len;
	int i, j;

	if (!*signingkey) {
		if (strlcpy(signingkey, git_committer_info(IDENT_ERROR_ON_NO_NAME),
				sizeof(signingkey)) > sizeof(signingkey) - 1)
			return error("committer info too long.");
		bracket = strchr(signingkey, '>');
		if (bracket)
			bracket[1] = '\0';
	}

	/* When the username signingkey is bad, program could be terminated
	 * because gpg exits without reading and then write gets SIGPIPE. */
	signal(SIGPIPE, SIG_IGN);

	memset(&gpg, 0, sizeof(gpg));
	gpg.argv = args;
	gpg.in = -1;
	gpg.out = -1;
	args[0] = "gpg";
	args[1] = "-bsau";
	args[2] = signingkey;
	args[3] = NULL;

	if (start_command(&gpg))
		return error("could not run gpg.");

	if (write_in_full(gpg.in, buffer->buf, buffer->len) != buffer->len) {
		close(gpg.in);
		close(gpg.out);
		finish_command(&gpg);
		return error("gpg did not accept the tag data");
	}
	close(gpg.in);
	len = strbuf_read(buffer, gpg.out, 1024);
	close(gpg.out);

	if (finish_command(&gpg) || !len || len < 0)
		return error("gpg failed to sign the tag");

	/* Strip CR from the line endings, in case we are on Windows. */
	for (i = j = 0; i < buffer->len; i++)
		if (buffer->buf[i] != '\r') {
			if (i != j)
				buffer->buf[j] = buffer->buf[i];
			j++;
		}
	strbuf_setlen(buffer, j);

	return 0;
}

static const char tag_template[] =
	"\n"
	"#\n"
	"# Write a tag message\n"
	"#\n";

static void set_signingkey(const char *value)
{
	if (strlcpy(signingkey, value, sizeof(signingkey)) >= sizeof(signingkey))
		die("signing key value too long (%.10s...)", value);
}

static int git_tag_config(const char *var, const char *value, void *cb)
{
	if (!strcmp(var, "user.signingkey")) {
		if (!value)
			return config_error_nonbool(var);
		set_signingkey(value);
		return 0;
	}

	return git_default_config(var, value, cb);
}

static void write_tag_body(int fd, const unsigned char *sha1)
{
	unsigned long size;
	enum object_type type;
	char *buf, *sp, *eob;
	size_t len;

	buf = read_sha1_file(sha1, &type, &size);
	if (!buf)
		return;
	/* skip header */
	sp = strstr(buf, "\n\n");

	if (!sp || !size || type != OBJ_TAG) {
		free(buf);
		return;
	}
	sp += 2; /* skip the 2 LFs */
	eob = strstr(sp, "\n" PGP_SIGNATURE "\n");
	if (eob)
		len = eob - sp;
	else
		len = buf + size - sp;
	write_or_die(fd, sp, len);

	free(buf);
}

static void create_tag(const unsigned char *object, const char *tag,
		       struct strbuf *buf, int message, int sign,
		       unsigned char *prev, unsigned char *result)
{
	enum object_type type;
	char header_buf[1024];
	int header_len;

	type = sha1_object_info(object, NULL);
	if (type <= OBJ_NONE)
	    die("bad object type.");

	header_len = snprintf(header_buf, sizeof(header_buf),
			  "object %s\n"
			  "type %s\n"
			  "tag %s\n"
			  "tagger %s\n\n",
			  sha1_to_hex(object),
			  typename(type),
			  tag,
			  git_committer_info(IDENT_ERROR_ON_NO_NAME));

	if (header_len > sizeof(header_buf) - 1)
		die("tag header too big.");

	if (!message) {
		char *path;
		int fd;

		/* write the template message before editing: */
		path = xstrdup(git_path("TAG_EDITMSG"));
		fd = open(path, O_CREAT | O_TRUNC | O_WRONLY, 0600);
		if (fd < 0)
			die("could not create file '%s': %s",
						path, strerror(errno));

		if (!is_null_sha1(prev))
			write_tag_body(fd, prev);
		else
			write_or_die(fd, tag_template, strlen(tag_template));
		close(fd);

		if (launch_editor(path, buf, NULL)) {
			fprintf(stderr,
			"Please supply the message using either -m or -F option.\n");
			exit(1);
		}

		unlink(path);
		free(path);
	}

	stripspace(buf, 1);

	if (!message && !buf->len)
		die("no tag message?");

	strbuf_insert(buf, 0, header_buf, header_len);

	if (sign && do_sign(buf) < 0)
		die("unable to sign the tag");
	if (write_sha1_file(buf->buf, buf->len, tag_type, result) < 0)
		die("unable to write tag file");
}

struct msg_arg {
	int given;
	struct strbuf buf;
};

static int parse_msg_arg(const struct option *opt, const char *arg, int unset)
{
	struct msg_arg *msg = opt->value;

	if (!arg)
		return -1;
	if (msg->buf.len)
		strbuf_addstr(&(msg->buf), "\n\n");
	strbuf_addstr(&(msg->buf), arg);
	msg->given = 1;
	return 0;
}

int cmd_tag(int argc, const char **argv, const char *prefix)
{
	struct strbuf buf;
	unsigned char object[20], prev[20];
	char ref[PATH_MAX];
	const char *object_ref, *tag;
	struct ref_lock *lock;

	int annotate = 0, sign = 0, force = 0, lines = 0,
		list = 0, delete = 0, verify = 0;
	const char *msgfile = NULL, *keyid = NULL;
	struct msg_arg msg = { 0, STRBUF_INIT };
	struct option options[] = {
		OPT_BOOLEAN('l', NULL, &list, "list tag names"),
		{ OPTION_INTEGER, 'n', NULL, &lines, NULL,
				"print n lines of each tag message",
				PARSE_OPT_OPTARG, NULL, 1 },
		OPT_BOOLEAN('d', NULL, &delete, "delete tags"),
		OPT_BOOLEAN('v', NULL, &verify, "verify tags"),

		OPT_GROUP("Tag creation options"),
		OPT_BOOLEAN('a', NULL, &annotate,
					"annotated tag, needs a message"),
		OPT_CALLBACK('m', NULL, &msg, "msg",
			     "message for the tag", parse_msg_arg),
		OPT_STRING('F', NULL, &msgfile, "file", "message in a file"),
		OPT_BOOLEAN('s', NULL, &sign, "annotated and GPG-signed tag"),
		OPT_STRING('u', NULL, &keyid, "key-id",
					"use another key to sign the tag"),
		OPT_BOOLEAN('f', NULL, &force, "replace the tag if exists"),
		OPT_END()
	};

	git_config(git_tag_config, NULL);

	argc = parse_options(argc, argv, options, git_tag_usage, 0);
	msgfile = parse_options_fix_filename(prefix, msgfile);

	if (keyid) {
		sign = 1;
		set_signingkey(keyid);
	}
	if (sign)
		annotate = 1;

	if (list)
		return list_tags(argv[0], lines);
	if (delete)
		return for_each_tag_name(argv, delete_tag);
	if (verify)
		return for_each_tag_name(argv, verify_tag);

	strbuf_init(&buf, 0);
	if (msg.given || msgfile) {
		if (msg.given && msgfile)
			die("only one -F or -m option is allowed.");
		annotate = 1;
		if (msg.given)
			strbuf_addbuf(&buf, &(msg.buf));
		else {
			if (!strcmp(msgfile, "-")) {
				if (strbuf_read(&buf, 0, 1024) < 0)
					die("cannot read %s", msgfile);
			} else {
				if (strbuf_read_file(&buf, msgfile, 1024) < 0)
					die("could not open or read '%s': %s",
						msgfile, strerror(errno));
			}
		}
	}

	if (argc == 0) {
		if (annotate)
			usage_with_options(git_tag_usage, options);
		return list_tags(NULL, lines);
	}
	tag = argv[0];

	object_ref = argc == 2 ? argv[1] : "HEAD";
	if (argc > 2)
		die("too many params");

	if (get_sha1(object_ref, object))
		die("Failed to resolve '%s' as a valid ref.", object_ref);

	if (snprintf(ref, sizeof(ref), "refs/tags/%s", tag) > sizeof(ref) - 1)
		die("tag name too long: %.*s...", 50, tag);
	if (check_ref_format(ref))
		die("'%s' is not a valid tag name.", tag);

	if (!resolve_ref(ref, prev, 1, NULL))
		hashclr(prev);
	else if (!force)
		die("tag '%s' already exists", tag);

	if (annotate)
		create_tag(object, tag, &buf, msg.given || msgfile,
			   sign, prev, object);

	lock = lock_any_ref_for_update(ref, prev, 0);
	if (!lock)
		die("%s: cannot lock the ref", ref);
	if (write_ref_sha1(lock, object, NULL) < 0)
		die("%s: cannot update the ref", ref);

	strbuf_release(&buf);
	return 0;
}
Commit	Line	Data
62e09ce9 CR	1	/*
	2	* Builtin "git tag"
	3	*
	4	* Copyright (c) 2007 Kristian Høgsberg <krh@redhat.com>,
	5	* Carlos Rica <jasampler@gmail.com>
	6	* Based on git-tag.sh and mktag.c by Linus Torvalds.
	7	*/
	8
	9	#include "cache.h"
	10	#include "builtin.h"
	11	#include "refs.h"
	12	#include "tag.h"
	13	#include "run-command.h"
39686585 CR	14	#include "parse-options.h"
	15
	16	static const char * const git_tag_usage[] = {
1b1dd23f SB	17	"git tag [-a\|-s\|-u <key-id>] [-f] [-m <msg>\|-F <file>] <tagname> [<head>]",
	18	"git tag -d <tagname>...",
	19	"git tag -l [-n[<num>]] [<pattern>]",
	20	"git tag -v <tagname>...",
39686585 CR	21	NULL
39686585 CR	22	};
62e09ce9 CR	23
	24	static char signingkey[1000];
	25
62e09ce9 CR	26	struct tag_filter {
	27	const char *pattern;
	28	int lines;
	29	};
	30
	31	#define PGP_SIGNATURE "-----BEGIN PGP SIGNATURE-----"
	32
	33	static int show_reference(const char refname, const unsigned char sha1,
	34	int flag, void *cb_data)
	35	{
	36	struct tag_filter *filter = cb_data;
	37
	38	if (!fnmatch(filter->pattern, refname, 0)) {
	39	int i;
	40	unsigned long size;
	41	enum object_type type;
	42	char buf, sp, *eol;
	43	size_t len;
	44
	45	if (!filter->lines) {
	46	printf("%s\n", refname);
	47	return 0;
	48	}
	49	printf("%-15s ", refname);
	50
e1f14cce MH	51	buf = read_sha1_file(sha1, &type, &size);
e1f14cce MH	52	if (!buf \|\| !size)
62e09ce9	53	return 0;
e1f14cce MH	54
	55	/* skip header */
	56	sp = strstr(buf, "\n\n");
	57	if (!sp) {
e317cfaf CR	58	free(buf);
	59	return 0;
	60	}
62e09ce9	61	/* only take up to "lines" lines, and strip the signature */
e317cfaf CR	62	for (i = 0, sp += 2;
e317cfaf CR	63	i < filter->lines && sp < buf + size &&
62e09ce9 CR	64	prefixcmp(sp, PGP_SIGNATURE "\n");
	65	i++) {
	66	if (i)
	67	printf("\n ");
	68	eol = memchr(sp, '\n', size - (sp - buf));
	69	len = eol ? eol - sp : size - (sp - buf);
	70	fwrite(sp, len, 1, stdout);
	71	if (!eol)
	72	break;
	73	sp = eol + 1;
	74	}
	75	putchar('\n');
	76	free(buf);
	77	}
	78
	79	return 0;
	80	}
	81
	82	static int list_tags(const char *pattern, int lines)
	83	{
	84	struct tag_filter filter;
62e09ce9 CR	85
62e09ce9 CR	86	if (pattern == NULL)
18e32b5b	87	pattern = "*";
62e09ce9	88
18e32b5b	89	filter.pattern = pattern;
62e09ce9 CR	90	filter.lines = lines;
	91
	92	for_each_tag_ref(show_reference, (void *) &filter);
	93
62e09ce9 CR	94	return 0;
	95	}
	96
e317cfaf	97	typedef int (each_tag_name_fn)(const char name, const char *ref,
62e09ce9 CR	98	const unsigned char *sha1);
62e09ce9 CR	99
e317cfaf	100	static int for_each_tag_name(const char **argv, each_tag_name_fn fn)
62e09ce9 CR	101	{
	102	const char **p;
	103	char ref[PATH_MAX];
	104	int had_error = 0;
	105	unsigned char sha1[20];
	106
	107	for (p = argv; *p; p++) {
	108	if (snprintf(ref, sizeof(ref), "refs/tags/%s", *p)
	109	>= sizeof(ref)) {
	110	error("tag name too long: %.s...", 50, p);
	111	had_error = 1;
	112	continue;
	113	}
	114	if (!resolve_ref(ref, sha1, 1, NULL)) {
	115	error("tag '%s' not found.", *p);
	116	had_error = 1;
	117	continue;
	118	}
	119	if (fn(*p, ref, sha1))
	120	had_error = 1;
	121	}
	122	return had_error;
	123	}
	124
	125	static int delete_tag(const char name, const char ref,
	126	const unsigned char *sha1)
	127	{
	128	if (delete_ref(ref, sha1))
	129	return 1;
	130	printf("Deleted tag '%s'\n", name);
	131	return 0;
	132	}
	133
	134	static int verify_tag(const char name, const char ref,
	135	const unsigned char *sha1)
	136	{
	137	const char *argv_verify_tag[] = {"git-verify-tag",
	138	"-v", "SHA1_HEX", NULL};
	139	argv_verify_tag[2] = sha1_to_hex(sha1);
	140
	141	if (run_command_v_opt(argv_verify_tag, 0))
	142	return error("could not verify the tag '%s'", name);
	143	return 0;
	144	}
	145
fd17f5b5	146	static int do_sign(struct strbuf *buffer)
62e09ce9 CR	147	{
	148	struct child_process gpg;
	149	const char *args[4];
	150	char *bracket;
	151	int len;
c4adea82	152	int i, j;
62e09ce9 CR	153
62e09ce9 CR	154	if (!*signingkey) {
774751a8	155	if (strlcpy(signingkey, git_committer_info(IDENT_ERROR_ON_NO_NAME),
e317cfaf	156	sizeof(signingkey)) > sizeof(signingkey) - 1)
62e09ce9 CR	157	return error("committer info too long.");
	158	bracket = strchr(signingkey, '>');
	159	if (bracket)
	160	bracket[1] = '\0';
	161	}
	162
aba91192 CR	163	/* When the username signingkey is bad, program could be terminated
	164	* because gpg exits without reading and then write gets SIGPIPE. */
	165	signal(SIGPIPE, SIG_IGN);
	166
62e09ce9 CR	167	memset(&gpg, 0, sizeof(gpg));
	168	gpg.argv = args;
	169	gpg.in = -1;
	170	gpg.out = -1;
	171	args[0] = "gpg";
	172	args[1] = "-bsau";
	173	args[2] = signingkey;
	174	args[3] = NULL;
	175
	176	if (start_command(&gpg))
	177	return error("could not run gpg.");
	178
fd17f5b5	179	if (write_in_full(gpg.in, buffer->buf, buffer->len) != buffer->len) {
aba91192	180	close(gpg.in);
e72ae288	181	close(gpg.out);
aba91192 CR	182	finish_command(&gpg);
	183	return error("gpg did not accept the tag data");
	184	}
62e09ce9	185	close(gpg.in);
fd17f5b5	186	len = strbuf_read(buffer, gpg.out, 1024);
e72ae288	187	close(gpg.out);
62e09ce9	188
aba91192 CR	189	if (finish_command(&gpg) \|\| !len \|\| len < 0)
aba91192 CR	190	return error("gpg failed to sign the tag");
62e09ce9	191
c4adea82 JS	192	/* Strip CR from the line endings, in case we are on Windows. */
	193	for (i = j = 0; i < buffer->len; i++)
	194	if (buffer->buf[i] != '\r') {
	195	if (i != j)
	196	buffer->buf[j] = buffer->buf[i];
	197	j++;
	198	}
	199	strbuf_setlen(buffer, j);
	200
fd17f5b5	201	return 0;
62e09ce9 CR	202	}
	203
	204	static const char tag_template[] =
	205	"\n"
	206	"#\n"
	207	"# Write a tag message\n"
	208	"#\n";
	209
be15f505 LT	210	static void set_signingkey(const char *value)
	211	{
	212	if (strlcpy(signingkey, value, sizeof(signingkey)) >= sizeof(signingkey))
	213	die("signing key value too long (%.10s...)", value);
	214	}
	215
ef90d6d4	216	static int git_tag_config(const char var, const char value, void *cb)
62e09ce9 CR	217	{
	218	if (!strcmp(var, "user.signingkey")) {
	219	if (!value)
c96a6d36	220	return config_error_nonbool(var);
be15f505	221	set_signingkey(value);
62e09ce9 CR	222	return 0;
	223	}
	224
ef90d6d4	225	return git_default_config(var, value, cb);
62e09ce9 CR	226	}
62e09ce9 CR	227
bab8118a MH	228	static void write_tag_body(int fd, const unsigned char *sha1)
	229	{
	230	unsigned long size;
	231	enum object_type type;
	232	char buf, sp, *eob;
	233	size_t len;
	234
	235	buf = read_sha1_file(sha1, &type, &size);
	236	if (!buf)
	237	return;
	238	/* skip header */
	239	sp = strstr(buf, "\n\n");
	240
	241	if (!sp \|\| !size \|\| type != OBJ_TAG) {
	242	free(buf);
	243	return;
	244	}
	245	sp += 2; /* skip the 2 LFs */
	246	eob = strstr(sp, "\n" PGP_SIGNATURE "\n");
	247	if (eob)
	248	len = eob - sp;
	249	else
	250	len = buf + size - sp;
	251	write_or_die(fd, sp, len);
	252
	253	free(buf);
	254	}
	255
62e09ce9	256	static void create_tag(const unsigned char object, const char tag,
fd17f5b5	257	struct strbuf *buf, int message, int sign,
bd46c9a9	258	unsigned char prev, unsigned char result)
62e09ce9 CR	259	{
62e09ce9 CR	260	enum object_type type;
fd17f5b5 PH	261	char header_buf[1024];
fd17f5b5 PH	262	int header_len;
62e09ce9 CR	263
62e09ce9 CR	264	type = sha1_object_info(object, NULL);
e317cfaf	265	if (type <= OBJ_NONE)
62e09ce9 CR	266	die("bad object type.");
	267
	268	header_len = snprintf(header_buf, sizeof(header_buf),
	269	"object %s\n"
	270	"type %s\n"
	271	"tag %s\n"
	272	"tagger %s\n\n",
	273	sha1_to_hex(object),
	274	typename(type),
	275	tag,
774751a8	276	git_committer_info(IDENT_ERROR_ON_NO_NAME));
62e09ce9	277
e317cfaf	278	if (header_len > sizeof(header_buf) - 1)
62e09ce9 CR	279	die("tag header too big.");
	280
	281	if (!message) {
	282	char *path;
	283	int fd;
	284
	285	/* write the template message before editing: */
	286	path = xstrdup(git_path("TAG_EDITMSG"));
	287	fd = open(path, O_CREAT \| O_TRUNC \| O_WRONLY, 0600);
	288	if (fd < 0)
	289	die("could not create file '%s': %s",
	290	path, strerror(errno));
bab8118a MH	291
	292	if (!is_null_sha1(prev))
	293	write_tag_body(fd, prev);
	294	else
	295	write_or_die(fd, tag_template, strlen(tag_template));
62e09ce9 CR	296	close(fd);
62e09ce9 CR	297
7198203a SB	298	if (launch_editor(path, buf, NULL)) {
	299	fprintf(stderr,
	300	"Please supply the message using either -m or -F option.\n");
	301	exit(1);
	302	}
62e09ce9 CR	303
	304	unlink(path);
	305	free(path);
	306	}
62e09ce9	307
6d69b6f6	308	stripspace(buf, 1);
62e09ce9	309
fd17f5b5	310	if (!message && !buf->len)
62e09ce9 CR	311	die("no tag message?");
62e09ce9 CR	312
fd17f5b5	313	strbuf_insert(buf, 0, header_buf, header_len);
62e09ce9	314
fd17f5b5 PH	315	if (sign && do_sign(buf) < 0)
	316	die("unable to sign the tag");
	317	if (write_sha1_file(buf->buf, buf->len, tag_type, result) < 0)
62e09ce9	318	die("unable to write tag file");
62e09ce9 CR	319	}
62e09ce9 CR	320
bd46c9a9 JH	321	struct msg_arg {
	322	int given;
	323	struct strbuf buf;
	324	};
	325
	326	static int parse_msg_arg(const struct option opt, const char arg, int unset)
	327	{
	328	struct msg_arg *msg = opt->value;
	329
	330	if (!arg)
	331	return -1;
	332	if (msg->buf.len)
	333	strbuf_addstr(&(msg->buf), "\n\n");
	334	strbuf_addstr(&(msg->buf), arg);
	335	msg->given = 1;
	336	return 0;
	337	}
	338
62e09ce9 CR	339	int cmd_tag(int argc, const char *argv, const char prefix)
62e09ce9 CR	340	{
fd17f5b5	341	struct strbuf buf;
62e09ce9	342	unsigned char object[20], prev[20];
62e09ce9 CR	343	char ref[PATH_MAX];
62e09ce9 CR	344	const char object_ref, tag;
62e09ce9 CR	345	struct ref_lock *lock;
62e09ce9 CR	346
39686585	347	int annotate = 0, sign = 0, force = 0, lines = 0,
78d776a9	348	list = 0, delete = 0, verify = 0;
dbd0f5c7	349	const char msgfile = NULL, keyid = NULL;
bd46c9a9	350	struct msg_arg msg = { 0, STRBUF_INIT };
39686585	351	struct option options[] = {
78d776a9	352	OPT_BOOLEAN('l', NULL, &list, "list tag names"),
39686585 CR	353	{ OPTION_INTEGER, 'n', NULL, &lines, NULL,
	354	"print n lines of each tag message",
	355	PARSE_OPT_OPTARG, NULL, 1 },
	356	OPT_BOOLEAN('d', NULL, &delete, "delete tags"),
	357	OPT_BOOLEAN('v', NULL, &verify, "verify tags"),
	358
	359	OPT_GROUP("Tag creation options"),
	360	OPT_BOOLEAN('a', NULL, &annotate,
	361	"annotated tag, needs a message"),
bd46c9a9 JH	362	OPT_CALLBACK('m', NULL, &msg, "msg",
bd46c9a9 JH	363	"message for the tag", parse_msg_arg),
39686585 CR	364	OPT_STRING('F', NULL, &msgfile, "file", "message in a file"),
	365	OPT_BOOLEAN('s', NULL, &sign, "annotated and GPG-signed tag"),
	366	OPT_STRING('u', NULL, &keyid, "key-id",
	367	"use another key to sign the tag"),
	368	OPT_BOOLEAN('f', NULL, &force, "replace the tag if exists"),
	369	OPT_END()
	370	};
	371
ef90d6d4	372	git_config(git_tag_config, NULL);
62e09ce9	373
39686585	374	argc = parse_options(argc, argv, options, git_tag_usage, 0);
dbd0f5c7	375	msgfile = parse_options_fix_filename(prefix, msgfile);
62e09ce9	376
be15f505 LT	377	if (keyid) {
	378	sign = 1;
	379	set_signingkey(keyid);
	380	}
c1a41b9d JH	381	if (sign)
	382	annotate = 1;
	383
39686585	384	if (list)
78d776a9	385	return list_tags(argv[0], lines);
39686585 CR	386	if (delete)
	387	return for_each_tag_name(argv, delete_tag);
	388	if (verify)
	389	return for_each_tag_name(argv, verify_tag);
	390
	391	strbuf_init(&buf, 0);
bd46c9a9 JH	392	if (msg.given \|\| msgfile) {
bd46c9a9 JH	393	if (msg.given && msgfile)
39686585 CR	394	die("only one -F or -m option is allowed.");
39686585 CR	395	annotate = 1;
bd46c9a9 JH	396	if (msg.given)
bd46c9a9 JH	397	strbuf_addbuf(&buf, &(msg.buf));
39686585 CR	398	else {
39686585 CR	399	if (!strcmp(msgfile, "-")) {
387e7e19	400	if (strbuf_read(&buf, 0, 1024) < 0)
39686585	401	die("cannot read %s", msgfile);
387e7e19	402	} else {
39686585	403	if (strbuf_read_file(&buf, msgfile, 1024) < 0)
387e7e19	404	die("could not open or read '%s': %s",
39686585	405	msgfile, strerror(errno));
62e09ce9	406	}
62e09ce9	407	}
62e09ce9 CR	408	}
62e09ce9 CR	409
39686585	410	if (argc == 0) {
62e09ce9	411	if (annotate)
39686585	412	usage_with_options(git_tag_usage, options);
62e09ce9 CR	413	return list_tags(NULL, lines);
62e09ce9 CR	414	}
39686585	415	tag = argv[0];
62e09ce9	416
39686585 CR	417	object_ref = argc == 2 ? argv[1] : "HEAD";
39686585 CR	418	if (argc > 2)
62e09ce9 CR	419	die("too many params");
	420
	421	if (get_sha1(object_ref, object))
	422	die("Failed to resolve '%s' as a valid ref.", object_ref);
	423
e317cfaf	424	if (snprintf(ref, sizeof(ref), "refs/tags/%s", tag) > sizeof(ref) - 1)
62e09ce9 CR	425	die("tag name too long: %.*s...", 50, tag);
	426	if (check_ref_format(ref))
	427	die("'%s' is not a valid tag name.", tag);
	428
	429	if (!resolve_ref(ref, prev, 1, NULL))
	430	hashclr(prev);
	431	else if (!force)
	432	die("tag '%s' already exists", tag);
	433
	434	if (annotate)
bd46c9a9 JH	435	create_tag(object, tag, &buf, msg.given \|\| msgfile,
bd46c9a9 JH	436	sign, prev, object);
62e09ce9 CR	437
	438	lock = lock_any_ref_for_update(ref, prev, 0);
	439	if (!lock)
	440	die("%s: cannot lock the ref", ref);
	441	if (write_ref_sha1(lock, object, NULL) < 0)
	442	die("%s: cannot update the ref", ref);
	443
fd17f5b5	444	strbuf_release(&buf);
62e09ce9 CR	445	return 0;
62e09ce9 CR	446	}