[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];

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, ":")) {
		size_t len = strlen(editor);
		int i = 0;
		const char *args[6];

		if (strcspn(editor, "$ \t'") != len) {
			/* there are specials */
			args[i++] = "sh";
			args[i++] = "-c";
			args[i++] = "$0 \"$@\"";
		}
		args[i++] = editor;
		args[i++] = path;
		args[i] = 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);
		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");

	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)
{
	if (!strcmp(var, "user.signingkey")) {
		if (!value)
			return config_error_nonbool(value);
		set_signingkey(value);
		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,
		list = 0, delete = 0, verify = 0;
	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);

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

	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[] = {
	17	"git-tag [-a\|-s\|-u <key-id>] [-f] [-m <msg>\|-F <file>] <tagname> [<head>]",
	18	"git-tag -d <tagname>...",
78d776a9	19	"git-tag -l [-n [<num>]] [<pattern>]",
39686585 CR	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	49	if (strcmp(editor, ":")) {
5e2de4f9 JH	50	size_t len = strlen(editor);
	51	int i = 0;
	52	const char *args[6];
	53
	54	if (strcspn(editor, "$ \t'") != len) {
	55	/* there are specials */
	56	args[i++] = "sh";
	57	args[i++] = "-c";
	58	args[i++] = "$0 \"$@\"";
	59	}
	60	args[i++] = editor;
	61	args[i++] = path;
	62	args[i] = NULL;
62e09ce9	63
8babab95	64	if (run_command_v_opt_cd_env(args, 0, NULL, env))
e97c9ad9 JS	65	die("There was a problem with the editor %s.", editor);
e97c9ad9 JS	66	}
62e09ce9	67
740001a5 JH	68	if (!buffer)
740001a5 JH	69	return;
387e7e19	70	if (strbuf_read_file(buffer, path, 0) < 0)
a9390b9f KH	71	die("could not read message file '%s': %s",
a9390b9f KH	72	path, strerror(errno));
62e09ce9 CR	73	}
	74
	75	struct tag_filter {
	76	const char *pattern;
	77	int lines;
	78	};
	79
	80	#define PGP_SIGNATURE "-----BEGIN PGP SIGNATURE-----"
	81
	82	static int show_reference(const char refname, const unsigned char sha1,
	83	int flag, void *cb_data)
	84	{
	85	struct tag_filter *filter = cb_data;
	86
	87	if (!fnmatch(filter->pattern, refname, 0)) {
	88	int i;
	89	unsigned long size;
	90	enum object_type type;
	91	char buf, sp, *eol;
	92	size_t len;
	93
	94	if (!filter->lines) {
	95	printf("%s\n", refname);
	96	return 0;
	97	}
	98	printf("%-15s ", refname);
	99
e1f14cce MH	100	buf = read_sha1_file(sha1, &type, &size);
e1f14cce MH	101	if (!buf \|\| !size)
62e09ce9	102	return 0;
e1f14cce MH	103
	104	/* skip header */
	105	sp = strstr(buf, "\n\n");
	106	if (!sp) {
e317cfaf CR	107	free(buf);
	108	return 0;
	109	}
62e09ce9	110	/* only take up to "lines" lines, and strip the signature */
e317cfaf CR	111	for (i = 0, sp += 2;
e317cfaf CR	112	i < filter->lines && sp < buf + size &&
62e09ce9 CR	113	prefixcmp(sp, PGP_SIGNATURE "\n");
	114	i++) {
	115	if (i)
	116	printf("\n ");
	117	eol = memchr(sp, '\n', size - (sp - buf));
	118	len = eol ? eol - sp : size - (sp - buf);
	119	fwrite(sp, len, 1, stdout);
	120	if (!eol)
	121	break;
	122	sp = eol + 1;
	123	}
	124	putchar('\n');
	125	free(buf);
	126	}
	127
	128	return 0;
	129	}
	130
	131	static int list_tags(const char *pattern, int lines)
	132	{
	133	struct tag_filter filter;
62e09ce9 CR	134
62e09ce9 CR	135	if (pattern == NULL)
18e32b5b	136	pattern = "*";
62e09ce9	137
18e32b5b	138	filter.pattern = pattern;
62e09ce9 CR	139	filter.lines = lines;
	140
	141	for_each_tag_ref(show_reference, (void *) &filter);
	142
62e09ce9 CR	143	return 0;
	144	}
	145
e317cfaf	146	typedef int (each_tag_name_fn)(const char name, const char *ref,
62e09ce9 CR	147	const unsigned char *sha1);
62e09ce9 CR	148
e317cfaf	149	static int for_each_tag_name(const char **argv, each_tag_name_fn fn)
62e09ce9 CR	150	{
	151	const char **p;
	152	char ref[PATH_MAX];
	153	int had_error = 0;
	154	unsigned char sha1[20];
	155
	156	for (p = argv; *p; p++) {
	157	if (snprintf(ref, sizeof(ref), "refs/tags/%s", *p)
	158	>= sizeof(ref)) {
	159	error("tag name too long: %.s...", 50, p);
	160	had_error = 1;
	161	continue;
	162	}
	163	if (!resolve_ref(ref, sha1, 1, NULL)) {
	164	error("tag '%s' not found.", *p);
	165	had_error = 1;
	166	continue;
	167	}
	168	if (fn(*p, ref, sha1))
	169	had_error = 1;
	170	}
	171	return had_error;
	172	}
	173
	174	static int delete_tag(const char name, const char ref,
	175	const unsigned char *sha1)
	176	{
	177	if (delete_ref(ref, sha1))
	178	return 1;
	179	printf("Deleted tag '%s'\n", name);
	180	return 0;
	181	}
	182
	183	static int verify_tag(const char name, const char ref,
	184	const unsigned char *sha1)
	185	{
	186	const char *argv_verify_tag[] = {"git-verify-tag",
	187	"-v", "SHA1_HEX", NULL};
	188	argv_verify_tag[2] = sha1_to_hex(sha1);
	189
	190	if (run_command_v_opt(argv_verify_tag, 0))
	191	return error("could not verify the tag '%s'", name);
	192	return 0;
	193	}
	194
fd17f5b5	195	static int do_sign(struct strbuf *buffer)
62e09ce9 CR	196	{
	197	struct child_process gpg;
	198	const char *args[4];
	199	char *bracket;
	200	int len;
	201
	202	if (!*signingkey) {
774751a8	203	if (strlcpy(signingkey, git_committer_info(IDENT_ERROR_ON_NO_NAME),
e317cfaf	204	sizeof(signingkey)) > sizeof(signingkey) - 1)
62e09ce9 CR	205	return error("committer info too long.");
	206	bracket = strchr(signingkey, '>');
	207	if (bracket)
	208	bracket[1] = '\0';
	209	}
	210
aba91192 CR	211	/* When the username signingkey is bad, program could be terminated
	212	* because gpg exits without reading and then write gets SIGPIPE. */
	213	signal(SIGPIPE, SIG_IGN);
	214
62e09ce9 CR	215	memset(&gpg, 0, sizeof(gpg));
	216	gpg.argv = args;
	217	gpg.in = -1;
	218	gpg.out = -1;
	219	args[0] = "gpg";
	220	args[1] = "-bsau";
	221	args[2] = signingkey;
	222	args[3] = NULL;
	223
	224	if (start_command(&gpg))
	225	return error("could not run gpg.");
	226
fd17f5b5	227	if (write_in_full(gpg.in, buffer->buf, buffer->len) != buffer->len) {
aba91192	228	close(gpg.in);
e72ae288	229	close(gpg.out);
aba91192 CR	230	finish_command(&gpg);
	231	return error("gpg did not accept the tag data");
	232	}
62e09ce9	233	close(gpg.in);
fd17f5b5	234	len = strbuf_read(buffer, gpg.out, 1024);
e72ae288	235	close(gpg.out);
62e09ce9	236
aba91192 CR	237	if (finish_command(&gpg) \|\| !len \|\| len < 0)
aba91192 CR	238	return error("gpg failed to sign the tag");
62e09ce9	239
fd17f5b5	240	return 0;
62e09ce9 CR	241	}
	242
	243	static const char tag_template[] =
	244	"\n"
	245	"#\n"
	246	"# Write a tag message\n"
	247	"#\n";
	248
be15f505 LT	249	static void set_signingkey(const char *value)
	250	{
	251	if (strlcpy(signingkey, value, sizeof(signingkey)) >= sizeof(signingkey))
	252	die("signing key value too long (%.10s...)", value);
	253	}
	254
62e09ce9 CR	255	static int git_tag_config(const char var, const char value)
	256	{
	257	if (!strcmp(var, "user.signingkey")) {
	258	if (!value)
406d95f2	259	return config_error_nonbool(value);
be15f505	260	set_signingkey(value);
62e09ce9 CR	261	return 0;
	262	}
	263
	264	return git_default_config(var, value);
	265	}
	266
bab8118a MH	267	static void write_tag_body(int fd, const unsigned char *sha1)
	268	{
	269	unsigned long size;
	270	enum object_type type;
	271	char buf, sp, *eob;
	272	size_t len;
	273
	274	buf = read_sha1_file(sha1, &type, &size);
	275	if (!buf)
	276	return;
	277	/* skip header */
	278	sp = strstr(buf, "\n\n");
	279
	280	if (!sp \|\| !size \|\| type != OBJ_TAG) {
	281	free(buf);
	282	return;
	283	}
	284	sp += 2; /* skip the 2 LFs */
	285	eob = strstr(sp, "\n" PGP_SIGNATURE "\n");
	286	if (eob)
	287	len = eob - sp;
	288	else
	289	len = buf + size - sp;
	290	write_or_die(fd, sp, len);
	291
	292	free(buf);
	293	}
	294
62e09ce9	295	static void create_tag(const unsigned char object, const char tag,
fd17f5b5	296	struct strbuf *buf, int message, int sign,
bd46c9a9	297	unsigned char prev, unsigned char result)
62e09ce9 CR	298	{
62e09ce9 CR	299	enum object_type type;
fd17f5b5 PH	300	char header_buf[1024];
fd17f5b5 PH	301	int header_len;
62e09ce9 CR	302
62e09ce9 CR	303	type = sha1_object_info(object, NULL);
e317cfaf	304	if (type <= OBJ_NONE)
62e09ce9 CR	305	die("bad object type.");
	306
	307	header_len = snprintf(header_buf, sizeof(header_buf),
	308	"object %s\n"
	309	"type %s\n"
	310	"tag %s\n"
	311	"tagger %s\n\n",
	312	sha1_to_hex(object),
	313	typename(type),
	314	tag,
774751a8	315	git_committer_info(IDENT_ERROR_ON_NO_NAME));
62e09ce9	316
e317cfaf	317	if (header_len > sizeof(header_buf) - 1)
62e09ce9 CR	318	die("tag header too big.");
	319
	320	if (!message) {
	321	char *path;
	322	int fd;
	323
	324	/* write the template message before editing: */
	325	path = xstrdup(git_path("TAG_EDITMSG"));
	326	fd = open(path, O_CREAT \| O_TRUNC \| O_WRONLY, 0600);
	327	if (fd < 0)
	328	die("could not create file '%s': %s",
	329	path, strerror(errno));
bab8118a MH	330
	331	if (!is_null_sha1(prev))
	332	write_tag_body(fd, prev);
	333	else
	334	write_or_die(fd, tag_template, strlen(tag_template));
62e09ce9 CR	335	close(fd);
62e09ce9 CR	336
8babab95	337	launch_editor(path, buf, NULL);
62e09ce9 CR	338
	339	unlink(path);
	340	free(path);
	341	}
62e09ce9	342
6d69b6f6	343	stripspace(buf, 1);
62e09ce9	344
fd17f5b5	345	if (!message && !buf->len)
62e09ce9 CR	346	die("no tag message?");
62e09ce9 CR	347
fd17f5b5	348	strbuf_insert(buf, 0, header_buf, header_len);
62e09ce9	349
fd17f5b5 PH	350	if (sign && do_sign(buf) < 0)
	351	die("unable to sign the tag");
	352	if (write_sha1_file(buf->buf, buf->len, tag_type, result) < 0)
62e09ce9	353	die("unable to write tag file");
62e09ce9 CR	354	}
62e09ce9 CR	355
bd46c9a9 JH	356	struct msg_arg {
	357	int given;
	358	struct strbuf buf;
	359	};
	360
	361	static int parse_msg_arg(const struct option opt, const char arg, int unset)
	362	{
	363	struct msg_arg *msg = opt->value;
	364
	365	if (!arg)
	366	return -1;
	367	if (msg->buf.len)
	368	strbuf_addstr(&(msg->buf), "\n\n");
	369	strbuf_addstr(&(msg->buf), arg);
	370	msg->given = 1;
	371	return 0;
	372	}
	373
62e09ce9 CR	374	int cmd_tag(int argc, const char *argv, const char prefix)
62e09ce9 CR	375	{
fd17f5b5	376	struct strbuf buf;
62e09ce9	377	unsigned char object[20], prev[20];
62e09ce9 CR	378	char ref[PATH_MAX];
62e09ce9 CR	379	const char object_ref, tag;
62e09ce9 CR	380	struct ref_lock *lock;
62e09ce9 CR	381
39686585	382	int annotate = 0, sign = 0, force = 0, lines = 0,
78d776a9 PH	383	list = 0, delete = 0, verify = 0;
78d776a9 PH	384	char msgfile = NULL, keyid = NULL;
bd46c9a9	385	struct msg_arg msg = { 0, STRBUF_INIT };
39686585	386	struct option options[] = {
78d776a9	387	OPT_BOOLEAN('l', NULL, &list, "list tag names"),
39686585 CR	388	{ OPTION_INTEGER, 'n', NULL, &lines, NULL,
	389	"print n lines of each tag message",
	390	PARSE_OPT_OPTARG, NULL, 1 },
	391	OPT_BOOLEAN('d', NULL, &delete, "delete tags"),
	392	OPT_BOOLEAN('v', NULL, &verify, "verify tags"),
	393
	394	OPT_GROUP("Tag creation options"),
	395	OPT_BOOLEAN('a', NULL, &annotate,
	396	"annotated tag, needs a message"),
bd46c9a9 JH	397	OPT_CALLBACK('m', NULL, &msg, "msg",
bd46c9a9 JH	398	"message for the tag", parse_msg_arg),
39686585 CR	399	OPT_STRING('F', NULL, &msgfile, "file", "message in a file"),
	400	OPT_BOOLEAN('s', NULL, &sign, "annotated and GPG-signed tag"),
	401	OPT_STRING('u', NULL, &keyid, "key-id",
	402	"use another key to sign the tag"),
	403	OPT_BOOLEAN('f', NULL, &force, "replace the tag if exists"),
	404	OPT_END()
	405	};
	406
62e09ce9 CR	407	git_config(git_tag_config);
62e09ce9 CR	408
39686585	409	argc = parse_options(argc, argv, options, git_tag_usage, 0);
62e09ce9	410
be15f505 LT	411	if (keyid) {
	412	sign = 1;
	413	set_signingkey(keyid);
	414	}
c1a41b9d JH	415	if (sign)
	416	annotate = 1;
	417
39686585	418	if (list)
78d776a9	419	return list_tags(argv[0], lines);
39686585 CR	420	if (delete)
	421	return for_each_tag_name(argv, delete_tag);
	422	if (verify)
	423	return for_each_tag_name(argv, verify_tag);
	424
	425	strbuf_init(&buf, 0);
bd46c9a9 JH	426	if (msg.given \|\| msgfile) {
bd46c9a9 JH	427	if (msg.given && msgfile)
39686585 CR	428	die("only one -F or -m option is allowed.");
39686585 CR	429	annotate = 1;
bd46c9a9 JH	430	if (msg.given)
bd46c9a9 JH	431	strbuf_addbuf(&buf, &(msg.buf));
39686585 CR	432	else {
39686585 CR	433	if (!strcmp(msgfile, "-")) {
387e7e19	434	if (strbuf_read(&buf, 0, 1024) < 0)
39686585	435	die("cannot read %s", msgfile);
387e7e19	436	} else {
39686585	437	if (strbuf_read_file(&buf, msgfile, 1024) < 0)
387e7e19	438	die("could not open or read '%s': %s",
39686585	439	msgfile, strerror(errno));
62e09ce9	440	}
62e09ce9	441	}
62e09ce9 CR	442	}
62e09ce9 CR	443
39686585	444	if (argc == 0) {
62e09ce9	445	if (annotate)
39686585	446	usage_with_options(git_tag_usage, options);
62e09ce9 CR	447	return list_tags(NULL, lines);
62e09ce9 CR	448	}
39686585	449	tag = argv[0];
62e09ce9	450
39686585 CR	451	object_ref = argc == 2 ? argv[1] : "HEAD";
39686585 CR	452	if (argc > 2)
62e09ce9 CR	453	die("too many params");
	454
	455	if (get_sha1(object_ref, object))
	456	die("Failed to resolve '%s' as a valid ref.", object_ref);
	457
e317cfaf	458	if (snprintf(ref, sizeof(ref), "refs/tags/%s", tag) > sizeof(ref) - 1)
62e09ce9 CR	459	die("tag name too long: %.*s...", 50, tag);
	460	if (check_ref_format(ref))
	461	die("'%s' is not a valid tag name.", tag);
	462
	463	if (!resolve_ref(ref, prev, 1, NULL))
	464	hashclr(prev);
	465	else if (!force)
	466	die("tag '%s' already exists", tag);
	467
	468	if (annotate)
bd46c9a9 JH	469	create_tag(object, tag, &buf, msg.given \|\| msgfile,
bd46c9a9 JH	470	sign, prev, object);
62e09ce9 CR	471
	472	lock = lock_any_ref_for_update(ref, prev, 0);
	473	if (!lock)
	474	die("%s: cannot lock the ref", ref);
	475	if (write_ref_sha1(lock, object, NULL) < 0)
	476	die("%s: cannot update the ref", ref);
	477
fd17f5b5	478	strbuf_release(&buf);
62e09ce9 CR	479	return 0;
62e09ce9 CR	480	}