[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, 0))
		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 int build_tag_object(struct strbuf *buf, int sign, unsigned char *result)
{
	if (sign && do_sign(buf) < 0)
		return error("unable to sign the tag");
	if (write_sha1_file(buf->buf, buf->len, tag_type, result) < 0)
		return error("unable to write tag file");
	return 0;
}

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;
	char *path = NULL;

	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) {
		int fd;

		/* write the template message before editing: */
		path = git_pathdup("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);
		}
	}

	stripspace(buf, 1);

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

	strbuf_insert(buf, 0, header_buf, header_len);

	if (build_tag_object(buf, sign, result) < 0) {
		if (path)
			fprintf(stderr, "The tag message has been left in %s\n",
				path);
		exit(128);
	}
	if (path) {
		unlink(path);
		free(path);
	}
}

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 = STRBUF_INIT;
	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 = -1,
		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 (argc == 0 && !(delete || verify))
		list = 1;

	if ((annotate || msg.given || msgfile || force) &&
	    (list || delete || verify))
		usage_with_options(git_tag_usage, options);

	if (list + delete + verify > 1)
		usage_with_options(git_tag_usage, options);
	if (list)
		return list_tags(argv[0], lines == -1 ? 0 : lines);
	if (lines != -1)
		die("-n option is only allowed with -l.");
	if (delete)
		return for_each_tag_name(argv, delete_tag);
	if (verify)
		return for_each_tag_name(argv, verify_tag);

	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));
			}
		}
	}

	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	{
eca35a25	128	if (delete_ref(ref, sha1, 0))
62e09ce9 CR	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
3927bbe9 JK	256	static int build_tag_object(struct strbuf buf, int sign, unsigned char result)
	257	{
	258	if (sign && do_sign(buf) < 0)
	259	return error("unable to sign the tag");
	260	if (write_sha1_file(buf->buf, buf->len, tag_type, result) < 0)
	261	return error("unable to write tag file");
	262	return 0;
	263	}
	264
62e09ce9	265	static void create_tag(const unsigned char object, const char tag,
fd17f5b5	266	struct strbuf *buf, int message, int sign,
bd46c9a9	267	unsigned char prev, unsigned char result)
62e09ce9 CR	268	{
62e09ce9 CR	269	enum object_type type;
fd17f5b5 PH	270	char header_buf[1024];
fd17f5b5 PH	271	int header_len;
3927bbe9	272	char *path = NULL;
62e09ce9 CR	273
62e09ce9 CR	274	type = sha1_object_info(object, NULL);
e317cfaf	275	if (type <= OBJ_NONE)
62e09ce9 CR	276	die("bad object type.");
	277
	278	header_len = snprintf(header_buf, sizeof(header_buf),
	279	"object %s\n"
	280	"type %s\n"
	281	"tag %s\n"
	282	"tagger %s\n\n",
	283	sha1_to_hex(object),
	284	typename(type),
	285	tag,
774751a8	286	git_committer_info(IDENT_ERROR_ON_NO_NAME));
62e09ce9	287
e317cfaf	288	if (header_len > sizeof(header_buf) - 1)
62e09ce9 CR	289	die("tag header too big.");
	290
	291	if (!message) {
62e09ce9 CR	292	int fd;
	293
	294	/* write the template message before editing: */
a4f34cbb	295	path = git_pathdup("TAG_EDITMSG");
62e09ce9 CR	296	fd = open(path, O_CREAT \| O_TRUNC \| O_WRONLY, 0600);
	297	if (fd < 0)
	298	die("could not create file '%s': %s",
	299	path, strerror(errno));
bab8118a MH	300
	301	if (!is_null_sha1(prev))
	302	write_tag_body(fd, prev);
	303	else
	304	write_or_die(fd, tag_template, strlen(tag_template));
62e09ce9 CR	305	close(fd);
62e09ce9 CR	306
7198203a SB	307	if (launch_editor(path, buf, NULL)) {
	308	fprintf(stderr,
	309	"Please supply the message using either -m or -F option.\n");
	310	exit(1);
	311	}
62e09ce9	312	}
62e09ce9	313
6d69b6f6	314	stripspace(buf, 1);
62e09ce9	315
fd17f5b5	316	if (!message && !buf->len)
62e09ce9 CR	317	die("no tag message?");
62e09ce9 CR	318
fd17f5b5	319	strbuf_insert(buf, 0, header_buf, header_len);
62e09ce9	320
3927bbe9 JK	321	if (build_tag_object(buf, sign, result) < 0) {
	322	if (path)
	323	fprintf(stderr, "The tag message has been left in %s\n",
	324	path);
	325	exit(128);
	326	}
	327	if (path) {
	328	unlink(path);
	329	free(path);
	330	}
62e09ce9 CR	331	}
62e09ce9 CR	332
bd46c9a9 JH	333	struct msg_arg {
	334	int given;
	335	struct strbuf buf;
	336	};
	337
	338	static int parse_msg_arg(const struct option opt, const char arg, int unset)
	339	{
	340	struct msg_arg *msg = opt->value;
	341
	342	if (!arg)
	343	return -1;
	344	if (msg->buf.len)
	345	strbuf_addstr(&(msg->buf), "\n\n");
	346	strbuf_addstr(&(msg->buf), arg);
	347	msg->given = 1;
	348	return 0;
	349	}
	350
62e09ce9 CR	351	int cmd_tag(int argc, const char *argv, const char prefix)
62e09ce9 CR	352	{
f285a2d7	353	struct strbuf buf = STRBUF_INIT;
62e09ce9	354	unsigned char object[20], prev[20];
62e09ce9 CR	355	char ref[PATH_MAX];
62e09ce9 CR	356	const char object_ref, tag;
62e09ce9 CR	357	struct ref_lock *lock;
62e09ce9 CR	358
6fa8342b	359	int annotate = 0, sign = 0, force = 0, lines = -1,
78d776a9	360	list = 0, delete = 0, verify = 0;
dbd0f5c7	361	const char msgfile = NULL, keyid = NULL;
bd46c9a9	362	struct msg_arg msg = { 0, STRBUF_INIT };
39686585	363	struct option options[] = {
78d776a9	364	OPT_BOOLEAN('l', NULL, &list, "list tag names"),
39686585 CR	365	{ OPTION_INTEGER, 'n', NULL, &lines, NULL,
	366	"print n lines of each tag message",
	367	PARSE_OPT_OPTARG, NULL, 1 },
	368	OPT_BOOLEAN('d', NULL, &delete, "delete tags"),
	369	OPT_BOOLEAN('v', NULL, &verify, "verify tags"),
	370
	371	OPT_GROUP("Tag creation options"),
	372	OPT_BOOLEAN('a', NULL, &annotate,
	373	"annotated tag, needs a message"),
bd46c9a9 JH	374	OPT_CALLBACK('m', NULL, &msg, "msg",
bd46c9a9 JH	375	"message for the tag", parse_msg_arg),
39686585 CR	376	OPT_STRING('F', NULL, &msgfile, "file", "message in a file"),
	377	OPT_BOOLEAN('s', NULL, &sign, "annotated and GPG-signed tag"),
	378	OPT_STRING('u', NULL, &keyid, "key-id",
	379	"use another key to sign the tag"),
	380	OPT_BOOLEAN('f', NULL, &force, "replace the tag if exists"),
	381	OPT_END()
	382	};
	383
ef90d6d4	384	git_config(git_tag_config, NULL);
62e09ce9	385
39686585	386	argc = parse_options(argc, argv, options, git_tag_usage, 0);
dbd0f5c7	387	msgfile = parse_options_fix_filename(prefix, msgfile);
62e09ce9	388
be15f505 LT	389	if (keyid) {
	390	sign = 1;
	391	set_signingkey(keyid);
	392	}
c1a41b9d JH	393	if (sign)
c1a41b9d JH	394	annotate = 1;
6fa8342b ST	395	if (argc == 0 && !(delete \|\| verify))
6fa8342b ST	396	list = 1;
c1a41b9d	397
6fa8342b ST	398	if ((annotate \|\| msg.given \|\| msgfile \|\| force) &&
	399	(list \|\| delete \|\| verify))
	400	usage_with_options(git_tag_usage, options);
	401
	402	if (list + delete + verify > 1)
	403	usage_with_options(git_tag_usage, options);
39686585	404	if (list)
6fa8342b ST	405	return list_tags(argv[0], lines == -1 ? 0 : lines);
	406	if (lines != -1)
	407	die("-n option is only allowed with -l.");
39686585 CR	408	if (delete)
	409	return for_each_tag_name(argv, delete_tag);
	410	if (verify)
	411	return for_each_tag_name(argv, verify_tag);
	412
bd46c9a9 JH	413	if (msg.given \|\| msgfile) {
bd46c9a9 JH	414	if (msg.given && msgfile)
39686585 CR	415	die("only one -F or -m option is allowed.");
39686585 CR	416	annotate = 1;
bd46c9a9 JH	417	if (msg.given)
bd46c9a9 JH	418	strbuf_addbuf(&buf, &(msg.buf));
39686585 CR	419	else {
39686585 CR	420	if (!strcmp(msgfile, "-")) {
387e7e19	421	if (strbuf_read(&buf, 0, 1024) < 0)
39686585	422	die("cannot read %s", msgfile);
387e7e19	423	} else {
39686585	424	if (strbuf_read_file(&buf, msgfile, 1024) < 0)
387e7e19	425	die("could not open or read '%s': %s",
39686585	426	msgfile, strerror(errno));
62e09ce9	427	}
62e09ce9	428	}
62e09ce9 CR	429	}
62e09ce9 CR	430
39686585	431	tag = argv[0];
62e09ce9	432
39686585 CR	433	object_ref = argc == 2 ? argv[1] : "HEAD";
39686585 CR	434	if (argc > 2)
62e09ce9 CR	435	die("too many params");
	436
	437	if (get_sha1(object_ref, object))
	438	die("Failed to resolve '%s' as a valid ref.", object_ref);
	439
e317cfaf	440	if (snprintf(ref, sizeof(ref), "refs/tags/%s", tag) > sizeof(ref) - 1)
62e09ce9 CR	441	die("tag name too long: %.*s...", 50, tag);
	442	if (check_ref_format(ref))
	443	die("'%s' is not a valid tag name.", tag);
	444
	445	if (!resolve_ref(ref, prev, 1, NULL))
	446	hashclr(prev);
	447	else if (!force)
	448	die("tag '%s' already exists", tag);
	449
	450	if (annotate)
bd46c9a9 JH	451	create_tag(object, tag, &buf, msg.given \|\| msgfile,
bd46c9a9 JH	452	sign, prev, object);
62e09ce9 CR	453
	454	lock = lock_any_ref_for_update(ref, prev, 0);
	455	if (!lock)
	456	die("%s: cannot lock the ref", ref);
	457	if (write_ref_sha1(lock, object, NULL) < 0)
	458	die("%s: cannot update the ref", ref);
	459
fd17f5b5	460	strbuf_release(&buf);
62e09ce9 CR	461	return 0;
62e09ce9 CR	462	}