[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 [-n [<num>]] -l [<pattern>]",
	"git-tag -v <tagname>...",
	NULL
};

static char signingkey[1000];

void launch_editor(const char *path, struct strbuf *buffer, const char *const *env)
{
	const char *editor, *terminal;

	editor = getenv("GIT_EDITOR");
	if (!editor && editor_program)
		editor = editor_program;
	if (!editor)
		editor = getenv("VISUAL");
	if (!editor)
		editor = getenv("EDITOR");

	terminal = getenv("TERM");
	if (!editor && (!terminal || !strcmp(terminal, "dumb"))) {
		fprintf(stderr,
		"Terminal is dumb but no VISUAL nor EDITOR defined.\n"
		"Please supply the message using either -m or -F option.\n");
		exit(1);
	}

	if (!editor)
		editor = "vi";

	if (strcmp(editor, ":")) {
		const char *args[] = { editor, path, NULL };

		if (run_command_v_opt_cd_env(args, 0, NULL, env))
			die("There was a problem with the editor %s.", editor);
	}

	if (!buffer)
		return;
	if (strbuf_read_file(buffer, path, 0) < 0)
		die("could not read message file '%s': %s",
		    path, strerror(errno));
}

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;

	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);
		finish_command(&gpg);
		return error("gpg did not accept the tag data");
	}
	close(gpg.in);
	gpg.close_in = 0;
	len = strbuf_read(buffer, gpg.out, 1024);

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

	if (len < 0)
		return error("could not read the entire signature from gpg.");

	return 0;
}

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

static int git_tag_config(const char *var, const char *value)
{
	if (!strcmp(var, "user.signingkey")) {
		if (!value)
			die("user.signingkey without value");
		if (strlcpy(signingkey, value, sizeof(signingkey))
						>= sizeof(signingkey))
			die("user.signingkey value too long");
		return 0;
	}

	return git_default_config(var, value);
}

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);

		launch_editor(path, buf, NULL);

		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,
					delete = 0, verify = 0;
	char *list = NULL, *msgfile = NULL, *keyid = NULL;
	const char *no_pattern = "NO_PATTERN";
	struct msg_arg msg = { 0, STRBUF_INIT };
	struct option options[] = {
		{ OPTION_STRING, 'l', NULL, &list, "pattern", "list tag names",
			PARSE_OPT_OPTARG, NULL, (intptr_t) no_pattern },
		{ 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);

	argc = parse_options(argc, argv, options, git_tag_usage, 0);

	if (sign)
		annotate = 1;

	if (list)
		return list_tags(list == no_pattern ? NULL : list, 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[] = {
	17	"git-tag [-a\|-s\|-u <key-id>] [-f] [-m <msg>\|-F <file>] <tagname> [<head>]",
	18	"git-tag -d <tagname>...",
	19	"git-tag [-n [<num>]] -l [<pattern>]",
	20	"git-tag -v <tagname>...",
	21	NULL
	22	};
62e09ce9 CR	23
	24	static char signingkey[1000];
	25
8babab95	26	void launch_editor(const char path, struct strbuf buffer, const char const env)
62e09ce9 CR	27	{
62e09ce9 CR	28	const char editor, terminal;
62e09ce9	29
4d87b9c5 JS	30	editor = getenv("GIT_EDITOR");
	31	if (!editor && editor_program)
	32	editor = editor_program;
	33	if (!editor)
	34	editor = getenv("VISUAL");
62e09ce9 CR	35	if (!editor)
	36	editor = getenv("EDITOR");
	37
	38	terminal = getenv("TERM");
	39	if (!editor && (!terminal \|\| !strcmp(terminal, "dumb"))) {
	40	fprintf(stderr,
	41	"Terminal is dumb but no VISUAL nor EDITOR defined.\n"
	42	"Please supply the message using either -m or -F option.\n");
	43	exit(1);
	44	}
	45
	46	if (!editor)
	47	editor = "vi";
	48
e97c9ad9 JS	49	if (strcmp(editor, ":")) {
e97c9ad9 JS	50	const char *args[] = { editor, path, NULL };
62e09ce9	51
8babab95	52	if (run_command_v_opt_cd_env(args, 0, NULL, env))
e97c9ad9 JS	53	die("There was a problem with the editor %s.", editor);
e97c9ad9 JS	54	}
62e09ce9	55
740001a5 JH	56	if (!buffer)
740001a5 JH	57	return;
387e7e19	58	if (strbuf_read_file(buffer, path, 0) < 0)
a9390b9f KH	59	die("could not read message file '%s': %s",
a9390b9f KH	60	path, strerror(errno));
62e09ce9 CR	61	}
	62
	63	struct tag_filter {
	64	const char *pattern;
	65	int lines;
	66	};
	67
	68	#define PGP_SIGNATURE "-----BEGIN PGP SIGNATURE-----"
	69
	70	static int show_reference(const char refname, const unsigned char sha1,
	71	int flag, void *cb_data)
	72	{
	73	struct tag_filter *filter = cb_data;
	74
	75	if (!fnmatch(filter->pattern, refname, 0)) {
	76	int i;
	77	unsigned long size;
	78	enum object_type type;
	79	char buf, sp, *eol;
	80	size_t len;
	81
	82	if (!filter->lines) {
	83	printf("%s\n", refname);
	84	return 0;
	85	}
	86	printf("%-15s ", refname);
	87
e1f14cce MH	88	buf = read_sha1_file(sha1, &type, &size);
e1f14cce MH	89	if (!buf \|\| !size)
62e09ce9	90	return 0;
e1f14cce MH	91
	92	/* skip header */
	93	sp = strstr(buf, "\n\n");
	94	if (!sp) {
e317cfaf CR	95	free(buf);
	96	return 0;
	97	}
62e09ce9	98	/* only take up to "lines" lines, and strip the signature */
e317cfaf CR	99	for (i = 0, sp += 2;
e317cfaf CR	100	i < filter->lines && sp < buf + size &&
62e09ce9 CR	101	prefixcmp(sp, PGP_SIGNATURE "\n");
	102	i++) {
	103	if (i)
	104	printf("\n ");
	105	eol = memchr(sp, '\n', size - (sp - buf));
	106	len = eol ? eol - sp : size - (sp - buf);
	107	fwrite(sp, len, 1, stdout);
	108	if (!eol)
	109	break;
	110	sp = eol + 1;
	111	}
	112	putchar('\n');
	113	free(buf);
	114	}
	115
	116	return 0;
	117	}
	118
	119	static int list_tags(const char *pattern, int lines)
	120	{
	121	struct tag_filter filter;
62e09ce9 CR	122
62e09ce9 CR	123	if (pattern == NULL)
18e32b5b	124	pattern = "*";
62e09ce9	125
18e32b5b	126	filter.pattern = pattern;
62e09ce9 CR	127	filter.lines = lines;
	128
	129	for_each_tag_ref(show_reference, (void *) &filter);
	130
62e09ce9 CR	131	return 0;
	132	}
	133
e317cfaf	134	typedef int (each_tag_name_fn)(const char name, const char *ref,
62e09ce9 CR	135	const unsigned char *sha1);
62e09ce9 CR	136
e317cfaf	137	static int for_each_tag_name(const char **argv, each_tag_name_fn fn)
62e09ce9 CR	138	{
	139	const char **p;
	140	char ref[PATH_MAX];
	141	int had_error = 0;
	142	unsigned char sha1[20];
	143
	144	for (p = argv; *p; p++) {
	145	if (snprintf(ref, sizeof(ref), "refs/tags/%s", *p)
	146	>= sizeof(ref)) {
	147	error("tag name too long: %.s...", 50, p);
	148	had_error = 1;
	149	continue;
	150	}
	151	if (!resolve_ref(ref, sha1, 1, NULL)) {
	152	error("tag '%s' not found.", *p);
	153	had_error = 1;
	154	continue;
	155	}
	156	if (fn(*p, ref, sha1))
	157	had_error = 1;
	158	}
	159	return had_error;
	160	}
	161
	162	static int delete_tag(const char name, const char ref,
	163	const unsigned char *sha1)
	164	{
	165	if (delete_ref(ref, sha1))
	166	return 1;
	167	printf("Deleted tag '%s'\n", name);
	168	return 0;
	169	}
	170
	171	static int verify_tag(const char name, const char ref,
	172	const unsigned char *sha1)
	173	{
	174	const char *argv_verify_tag[] = {"git-verify-tag",
	175	"-v", "SHA1_HEX", NULL};
	176	argv_verify_tag[2] = sha1_to_hex(sha1);
	177
	178	if (run_command_v_opt(argv_verify_tag, 0))
	179	return error("could not verify the tag '%s'", name);
	180	return 0;
	181	}
	182
fd17f5b5	183	static int do_sign(struct strbuf *buffer)
62e09ce9 CR	184	{
	185	struct child_process gpg;
	186	const char *args[4];
	187	char *bracket;
	188	int len;
	189
	190	if (!*signingkey) {
774751a8	191	if (strlcpy(signingkey, git_committer_info(IDENT_ERROR_ON_NO_NAME),
e317cfaf	192	sizeof(signingkey)) > sizeof(signingkey) - 1)
62e09ce9 CR	193	return error("committer info too long.");
	194	bracket = strchr(signingkey, '>');
	195	if (bracket)
	196	bracket[1] = '\0';
	197	}
	198
aba91192 CR	199	/* When the username signingkey is bad, program could be terminated
	200	* because gpg exits without reading and then write gets SIGPIPE. */
	201	signal(SIGPIPE, SIG_IGN);
	202
62e09ce9 CR	203	memset(&gpg, 0, sizeof(gpg));
	204	gpg.argv = args;
	205	gpg.in = -1;
	206	gpg.out = -1;
	207	args[0] = "gpg";
	208	args[1] = "-bsau";
	209	args[2] = signingkey;
	210	args[3] = NULL;
	211
	212	if (start_command(&gpg))
	213	return error("could not run gpg.");
	214
fd17f5b5	215	if (write_in_full(gpg.in, buffer->buf, buffer->len) != buffer->len) {
aba91192 CR	216	close(gpg.in);
	217	finish_command(&gpg);
	218	return error("gpg did not accept the tag data");
	219	}
62e09ce9 CR	220	close(gpg.in);
62e09ce9 CR	221	gpg.close_in = 0;
fd17f5b5	222	len = strbuf_read(buffer, gpg.out, 1024);
62e09ce9	223
aba91192 CR	224	if (finish_command(&gpg) \|\| !len \|\| len < 0)
aba91192 CR	225	return error("gpg failed to sign the tag");
62e09ce9	226
fd17f5b5	227	if (len < 0)
62e09ce9 CR	228	return error("could not read the entire signature from gpg.");
62e09ce9 CR	229
fd17f5b5	230	return 0;
62e09ce9 CR	231	}
	232
	233	static const char tag_template[] =
	234	"\n"
	235	"#\n"
	236	"# Write a tag message\n"
	237	"#\n";
	238
	239	static int git_tag_config(const char var, const char value)
	240	{
	241	if (!strcmp(var, "user.signingkey")) {
	242	if (!value)
	243	die("user.signingkey without value");
	244	if (strlcpy(signingkey, value, sizeof(signingkey))
	245	>= sizeof(signingkey))
	246	die("user.signingkey value too long");
	247	return 0;
	248	}
	249
	250	return git_default_config(var, value);
	251	}
	252
bab8118a MH	253	static void write_tag_body(int fd, const unsigned char *sha1)
	254	{
	255	unsigned long size;
	256	enum object_type type;
	257	char buf, sp, *eob;
	258	size_t len;
	259
	260	buf = read_sha1_file(sha1, &type, &size);
	261	if (!buf)
	262	return;
	263	/* skip header */
	264	sp = strstr(buf, "\n\n");
	265
	266	if (!sp \|\| !size \|\| type != OBJ_TAG) {
	267	free(buf);
	268	return;
	269	}
	270	sp += 2; /* skip the 2 LFs */
	271	eob = strstr(sp, "\n" PGP_SIGNATURE "\n");
	272	if (eob)
	273	len = eob - sp;
	274	else
	275	len = buf + size - sp;
	276	write_or_die(fd, sp, len);
	277
	278	free(buf);
	279	}
	280
62e09ce9	281	static void create_tag(const unsigned char object, const char tag,
fd17f5b5	282	struct strbuf *buf, int message, int sign,
bd46c9a9	283	unsigned char prev, unsigned char result)
62e09ce9 CR	284	{
62e09ce9 CR	285	enum object_type type;
fd17f5b5 PH	286	char header_buf[1024];
fd17f5b5 PH	287	int header_len;
62e09ce9 CR	288
62e09ce9 CR	289	type = sha1_object_info(object, NULL);
e317cfaf	290	if (type <= OBJ_NONE)
62e09ce9 CR	291	die("bad object type.");
	292
	293	header_len = snprintf(header_buf, sizeof(header_buf),
	294	"object %s\n"
	295	"type %s\n"
	296	"tag %s\n"
	297	"tagger %s\n\n",
	298	sha1_to_hex(object),
	299	typename(type),
	300	tag,
774751a8	301	git_committer_info(IDENT_ERROR_ON_NO_NAME));
62e09ce9	302
e317cfaf	303	if (header_len > sizeof(header_buf) - 1)
62e09ce9 CR	304	die("tag header too big.");
	305
	306	if (!message) {
	307	char *path;
	308	int fd;
	309
	310	/* write the template message before editing: */
	311	path = xstrdup(git_path("TAG_EDITMSG"));
	312	fd = open(path, O_CREAT \| O_TRUNC \| O_WRONLY, 0600);
	313	if (fd < 0)
	314	die("could not create file '%s': %s",
	315	path, strerror(errno));
bab8118a MH	316
	317	if (!is_null_sha1(prev))
	318	write_tag_body(fd, prev);
	319	else
	320	write_or_die(fd, tag_template, strlen(tag_template));
62e09ce9 CR	321	close(fd);
62e09ce9 CR	322
8babab95	323	launch_editor(path, buf, NULL);
62e09ce9 CR	324
	325	unlink(path);
	326	free(path);
	327	}
62e09ce9	328
6d69b6f6	329	stripspace(buf, 1);
62e09ce9	330
fd17f5b5	331	if (!message && !buf->len)
62e09ce9 CR	332	die("no tag message?");
62e09ce9 CR	333
fd17f5b5	334	strbuf_insert(buf, 0, header_buf, header_len);
62e09ce9	335
fd17f5b5 PH	336	if (sign && do_sign(buf) < 0)
	337	die("unable to sign the tag");
	338	if (write_sha1_file(buf->buf, buf->len, tag_type, result) < 0)
62e09ce9	339	die("unable to write tag file");
62e09ce9 CR	340	}
62e09ce9 CR	341
bd46c9a9 JH	342	struct msg_arg {
	343	int given;
	344	struct strbuf buf;
	345	};
	346
	347	static int parse_msg_arg(const struct option opt, const char arg, int unset)
	348	{
	349	struct msg_arg *msg = opt->value;
	350
	351	if (!arg)
	352	return -1;
	353	if (msg->buf.len)
	354	strbuf_addstr(&(msg->buf), "\n\n");
	355	strbuf_addstr(&(msg->buf), arg);
	356	msg->given = 1;
	357	return 0;
	358	}
	359
62e09ce9 CR	360	int cmd_tag(int argc, const char *argv, const char prefix)
62e09ce9 CR	361	{
fd17f5b5	362	struct strbuf buf;
62e09ce9	363	unsigned char object[20], prev[20];
62e09ce9 CR	364	char ref[PATH_MAX];
62e09ce9 CR	365	const char object_ref, tag;
62e09ce9 CR	366	struct ref_lock *lock;
62e09ce9 CR	367
39686585 CR	368	int annotate = 0, sign = 0, force = 0, lines = 0,
39686585 CR	369	delete = 0, verify = 0;
bd46c9a9	370	char list = NULL, msgfile = NULL, *keyid = NULL;
39686585	371	const char *no_pattern = "NO_PATTERN";
bd46c9a9	372	struct msg_arg msg = { 0, STRBUF_INIT };
39686585 CR	373	struct option options[] = {
	374	{ OPTION_STRING, 'l', NULL, &list, "pattern", "list tag names",
	375	PARSE_OPT_OPTARG, NULL, (intptr_t) no_pattern },
	376	{ OPTION_INTEGER, 'n', NULL, &lines, NULL,
	377	"print n lines of each tag message",
	378	PARSE_OPT_OPTARG, NULL, 1 },
	379	OPT_BOOLEAN('d', NULL, &delete, "delete tags"),
	380	OPT_BOOLEAN('v', NULL, &verify, "verify tags"),
	381
	382	OPT_GROUP("Tag creation options"),
	383	OPT_BOOLEAN('a', NULL, &annotate,
	384	"annotated tag, needs a message"),
bd46c9a9 JH	385	OPT_CALLBACK('m', NULL, &msg, "msg",
bd46c9a9 JH	386	"message for the tag", parse_msg_arg),
39686585 CR	387	OPT_STRING('F', NULL, &msgfile, "file", "message in a file"),
	388	OPT_BOOLEAN('s', NULL, &sign, "annotated and GPG-signed tag"),
	389	OPT_STRING('u', NULL, &keyid, "key-id",
	390	"use another key to sign the tag"),
	391	OPT_BOOLEAN('f', NULL, &force, "replace the tag if exists"),
	392	OPT_END()
	393	};
	394
62e09ce9 CR	395	git_config(git_tag_config);
62e09ce9 CR	396
39686585	397	argc = parse_options(argc, argv, options, git_tag_usage, 0);
62e09ce9	398
c1a41b9d JH	399	if (sign)
	400	annotate = 1;
	401
39686585 CR	402	if (list)
	403	return list_tags(list == no_pattern ? NULL : list, lines);
	404	if (delete)
	405	return for_each_tag_name(argv, delete_tag);
	406	if (verify)
	407	return for_each_tag_name(argv, verify_tag);
	408
	409	strbuf_init(&buf, 0);
bd46c9a9 JH	410	if (msg.given \|\| msgfile) {
bd46c9a9 JH	411	if (msg.given && msgfile)
39686585 CR	412	die("only one -F or -m option is allowed.");
39686585 CR	413	annotate = 1;
bd46c9a9 JH	414	if (msg.given)
bd46c9a9 JH	415	strbuf_addbuf(&buf, &(msg.buf));
39686585 CR	416	else {
39686585 CR	417	if (!strcmp(msgfile, "-")) {
387e7e19	418	if (strbuf_read(&buf, 0, 1024) < 0)
39686585	419	die("cannot read %s", msgfile);
387e7e19	420	} else {
39686585	421	if (strbuf_read_file(&buf, msgfile, 1024) < 0)
387e7e19	422	die("could not open or read '%s': %s",
39686585	423	msgfile, strerror(errno));
62e09ce9	424	}
62e09ce9	425	}
62e09ce9 CR	426	}
62e09ce9 CR	427
39686585	428	if (argc == 0) {
62e09ce9	429	if (annotate)
39686585	430	usage_with_options(git_tag_usage, options);
62e09ce9 CR	431	return list_tags(NULL, lines);
62e09ce9 CR	432	}
39686585	433	tag = argv[0];
62e09ce9	434
39686585 CR	435	object_ref = argc == 2 ? argv[1] : "HEAD";
39686585 CR	436	if (argc > 2)
62e09ce9 CR	437	die("too many params");
	438
	439	if (get_sha1(object_ref, object))
	440	die("Failed to resolve '%s' as a valid ref.", object_ref);
	441
e317cfaf	442	if (snprintf(ref, sizeof(ref), "refs/tags/%s", tag) > sizeof(ref) - 1)
62e09ce9 CR	443	die("tag name too long: %.*s...", 50, tag);
	444	if (check_ref_format(ref))
	445	die("'%s' is not a valid tag name.", tag);
	446
	447	if (!resolve_ref(ref, prev, 1, NULL))
	448	hashclr(prev);
	449	else if (!force)
	450	die("tag '%s' already exists", tag);
	451
	452	if (annotate)
bd46c9a9 JH	453	create_tag(object, tag, &buf, msg.given \|\| msgfile,
bd46c9a9 JH	454	sign, prev, object);
62e09ce9 CR	455
	456	lock = lock_any_ref_for_update(ref, prev, 0);
	457	if (!lock)
	458	die("%s: cannot lock the ref", ref);
	459	if (write_ref_sha1(lock, object, NULL) < 0)
	460	die("%s: cannot update the ref", ref);
	461
fd17f5b5	462	strbuf_release(&buf);
62e09ce9 CR	463	return 0;
62e09ce9 CR	464	}