[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];

static void launch_editor(const char *path, struct strbuf *buffer)
{
	const char *editor, *terminal;
	struct child_process child;
	const char *args[3];

	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";

	memset(&child, 0, sizeof(child));
	child.argv = args;
	args[0] = editor;
	args[1] = path;
	args[2] = NULL;

	if (run_command(&child))
		die("There was a problem with the editor %s.", editor);

	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(1),
				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(1));

	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);

		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");
}

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