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[git/jr.git] / builtin-tag.c
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1 /*
2 * Builtin "git tag"
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 */
9 #include "cache.h"
10 #include "builtin.h"
11 #include "refs.h"
12 #include "tag.h"
13 #include "run-command.h"
14 #include "parse-options.h"
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 -l [-n [<num>]] [<pattern>]",
20 "git-tag -v <tagname>...",
21 NULL
24 static char signingkey[1000];
26 void launch_editor(const char *path, struct strbuf *buffer, const char *const *env)
28 const char *editor, *terminal;
30 editor = getenv("GIT_EDITOR");
31 if (!editor && editor_program)
32 editor = editor_program;
33 if (!editor)
34 editor = getenv("VISUAL");
35 if (!editor)
36 editor = getenv("EDITOR");
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);
46 if (!editor)
47 editor = "vi";
49 if (strcmp(editor, ":")) {
50 size_t len = strlen(editor);
51 int i = 0;
52 const char *args[6];
54 if (strcspn(editor, "$ \t'") != len) {
55 /* there are specials */
56 args[i++] = "sh";
57 args[i++] = "-c";
58 args[i++] = "$0 \"$@\"";
60 args[i++] = editor;
61 args[i++] = path;
62 args[i] = NULL;
64 if (run_command_v_opt_cd_env(args, 0, NULL, env))
65 die("There was a problem with the editor %s.", editor);
68 if (!buffer)
69 return;
70 if (strbuf_read_file(buffer, path, 0) < 0)
71 die("could not read message file '%s': %s",
72 path, strerror(errno));
75 struct tag_filter {
76 const char *pattern;
77 int lines;
80 #define PGP_SIGNATURE "-----BEGIN PGP SIGNATURE-----"
82 static int show_reference(const char *refname, const unsigned char *sha1,
83 int flag, void *cb_data)
85 struct tag_filter *filter = cb_data;
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;
94 if (!filter->lines) {
95 printf("%s\n", refname);
96 return 0;
98 printf("%-15s ", refname);
100 buf = read_sha1_file(sha1, &type, &size);
101 if (!buf || !size)
102 return 0;
104 /* skip header */
105 sp = strstr(buf, "\n\n");
106 if (!sp) {
107 free(buf);
108 return 0;
110 /* only take up to "lines" lines, and strip the signature */
111 for (i = 0, sp += 2;
112 i < filter->lines && sp < buf + size &&
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;
124 putchar('\n');
125 free(buf);
128 return 0;
131 static int list_tags(const char *pattern, int lines)
133 struct tag_filter filter;
135 if (pattern == NULL)
136 pattern = "*";
138 filter.pattern = pattern;
139 filter.lines = lines;
141 for_each_tag_ref(show_reference, (void *) &filter);
143 return 0;
146 typedef int (*each_tag_name_fn)(const char *name, const char *ref,
147 const unsigned char *sha1);
149 static int for_each_tag_name(const char **argv, each_tag_name_fn fn)
151 const char **p;
152 char ref[PATH_MAX];
153 int had_error = 0;
154 unsigned char sha1[20];
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;
163 if (!resolve_ref(ref, sha1, 1, NULL)) {
164 error("tag '%s' not found.", *p);
165 had_error = 1;
166 continue;
168 if (fn(*p, ref, sha1))
169 had_error = 1;
171 return had_error;
174 static int delete_tag(const char *name, const char *ref,
175 const unsigned char *sha1)
177 if (delete_ref(ref, sha1))
178 return 1;
179 printf("Deleted tag '%s'\n", name);
180 return 0;
183 static int verify_tag(const char *name, const char *ref,
184 const unsigned char *sha1)
186 const char *argv_verify_tag[] = {"git-verify-tag",
187 "-v", "SHA1_HEX", NULL};
188 argv_verify_tag[2] = sha1_to_hex(sha1);
190 if (run_command_v_opt(argv_verify_tag, 0))
191 return error("could not verify the tag '%s'", name);
192 return 0;
195 static int do_sign(struct strbuf *buffer)
197 struct child_process gpg;
198 const char *args[4];
199 char *bracket;
200 int len;
202 if (!*signingkey) {
203 if (strlcpy(signingkey, git_committer_info(IDENT_ERROR_ON_NO_NAME),
204 sizeof(signingkey)) > sizeof(signingkey) - 1)
205 return error("committer info too long.");
206 bracket = strchr(signingkey, '>');
207 if (bracket)
208 bracket[1] = '\0';
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);
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;
224 if (start_command(&gpg))
225 return error("could not run gpg.");
227 if (write_in_full(gpg.in, buffer->buf, buffer->len) != buffer->len) {
228 close(gpg.in);
229 finish_command(&gpg);
230 return error("gpg did not accept the tag data");
232 close(gpg.in);
233 gpg.close_in = 0;
234 len = strbuf_read(buffer, gpg.out, 1024);
236 if (finish_command(&gpg) || !len || len < 0)
237 return error("gpg failed to sign the tag");
239 if (len < 0)
240 return error("could not read the entire signature from gpg.");
242 return 0;
245 static const char tag_template[] =
246 "\n"
247 "#\n"
248 "# Write a tag message\n"
249 "#\n";
251 static void set_signingkey(const char *value)
253 if (strlcpy(signingkey, value, sizeof(signingkey)) >= sizeof(signingkey))
254 die("signing key value too long (%.10s...)", value);
257 static int git_tag_config(const char *var, const char *value)
259 if (!strcmp(var, "user.signingkey")) {
260 if (!value)
261 die("user.signingkey without value");
262 set_signingkey(value);
263 return 0;
266 return git_default_config(var, value);
269 static void write_tag_body(int fd, const unsigned char *sha1)
271 unsigned long size;
272 enum object_type type;
273 char *buf, *sp, *eob;
274 size_t len;
276 buf = read_sha1_file(sha1, &type, &size);
277 if (!buf)
278 return;
279 /* skip header */
280 sp = strstr(buf, "\n\n");
282 if (!sp || !size || type != OBJ_TAG) {
283 free(buf);
284 return;
286 sp += 2; /* skip the 2 LFs */
287 eob = strstr(sp, "\n" PGP_SIGNATURE "\n");
288 if (eob)
289 len = eob - sp;
290 else
291 len = buf + size - sp;
292 write_or_die(fd, sp, len);
294 free(buf);
297 static void create_tag(const unsigned char *object, const char *tag,
298 struct strbuf *buf, int message, int sign,
299 unsigned char *prev, unsigned char *result)
301 enum object_type type;
302 char header_buf[1024];
303 int header_len;
305 type = sha1_object_info(object, NULL);
306 if (type <= OBJ_NONE)
307 die("bad object type.");
309 header_len = snprintf(header_buf, sizeof(header_buf),
310 "object %s\n"
311 "type %s\n"
312 "tag %s\n"
313 "tagger %s\n\n",
314 sha1_to_hex(object),
315 typename(type),
316 tag,
317 git_committer_info(IDENT_ERROR_ON_NO_NAME));
319 if (header_len > sizeof(header_buf) - 1)
320 die("tag header too big.");
322 if (!message) {
323 char *path;
324 int fd;
326 /* write the template message before editing: */
327 path = xstrdup(git_path("TAG_EDITMSG"));
328 fd = open(path, O_CREAT | O_TRUNC | O_WRONLY, 0600);
329 if (fd < 0)
330 die("could not create file '%s': %s",
331 path, strerror(errno));
333 if (!is_null_sha1(prev))
334 write_tag_body(fd, prev);
335 else
336 write_or_die(fd, tag_template, strlen(tag_template));
337 close(fd);
339 launch_editor(path, buf, NULL);
341 unlink(path);
342 free(path);
345 stripspace(buf, 1);
347 if (!message && !buf->len)
348 die("no tag message?");
350 strbuf_insert(buf, 0, header_buf, header_len);
352 if (sign && do_sign(buf) < 0)
353 die("unable to sign the tag");
354 if (write_sha1_file(buf->buf, buf->len, tag_type, result) < 0)
355 die("unable to write tag file");
358 struct msg_arg {
359 int given;
360 struct strbuf buf;
363 static int parse_msg_arg(const struct option *opt, const char *arg, int unset)
365 struct msg_arg *msg = opt->value;
367 if (!arg)
368 return -1;
369 if (msg->buf.len)
370 strbuf_addstr(&(msg->buf), "\n\n");
371 strbuf_addstr(&(msg->buf), arg);
372 msg->given = 1;
373 return 0;
376 int cmd_tag(int argc, const char **argv, const char *prefix)
378 struct strbuf buf;
379 unsigned char object[20], prev[20];
380 char ref[PATH_MAX];
381 const char *object_ref, *tag;
382 struct ref_lock *lock;
384 int annotate = 0, sign = 0, force = 0, lines = 0,
385 list = 0, delete = 0, verify = 0;
386 char *msgfile = NULL, *keyid = NULL;
387 struct msg_arg msg = { 0, STRBUF_INIT };
388 struct option options[] = {
389 OPT_BOOLEAN('l', NULL, &list, "list tag names"),
390 { OPTION_INTEGER, 'n', NULL, &lines, NULL,
391 "print n lines of each tag message",
392 PARSE_OPT_OPTARG, NULL, 1 },
393 OPT_BOOLEAN('d', NULL, &delete, "delete tags"),
394 OPT_BOOLEAN('v', NULL, &verify, "verify tags"),
396 OPT_GROUP("Tag creation options"),
397 OPT_BOOLEAN('a', NULL, &annotate,
398 "annotated tag, needs a message"),
399 OPT_CALLBACK('m', NULL, &msg, "msg",
400 "message for the tag", parse_msg_arg),
401 OPT_STRING('F', NULL, &msgfile, "file", "message in a file"),
402 OPT_BOOLEAN('s', NULL, &sign, "annotated and GPG-signed tag"),
403 OPT_STRING('u', NULL, &keyid, "key-id",
404 "use another key to sign the tag"),
405 OPT_BOOLEAN('f', NULL, &force, "replace the tag if exists"),
406 OPT_END()
409 git_config(git_tag_config);
411 argc = parse_options(argc, argv, options, git_tag_usage, 0);
413 if (keyid) {
414 sign = 1;
415 set_signingkey(keyid);
417 if (sign)
418 annotate = 1;
420 if (list)
421 return list_tags(argv[0], lines);
422 if (delete)
423 return for_each_tag_name(argv, delete_tag);
424 if (verify)
425 return for_each_tag_name(argv, verify_tag);
427 strbuf_init(&buf, 0);
428 if (msg.given || msgfile) {
429 if (msg.given && msgfile)
430 die("only one -F or -m option is allowed.");
431 annotate = 1;
432 if (msg.given)
433 strbuf_addbuf(&buf, &(msg.buf));
434 else {
435 if (!strcmp(msgfile, "-")) {
436 if (strbuf_read(&buf, 0, 1024) < 0)
437 die("cannot read %s", msgfile);
438 } else {
439 if (strbuf_read_file(&buf, msgfile, 1024) < 0)
440 die("could not open or read '%s': %s",
441 msgfile, strerror(errno));
446 if (argc == 0) {
447 if (annotate)
448 usage_with_options(git_tag_usage, options);
449 return list_tags(NULL, lines);
451 tag = argv[0];
453 object_ref = argc == 2 ? argv[1] : "HEAD";
454 if (argc > 2)
455 die("too many params");
457 if (get_sha1(object_ref, object))
458 die("Failed to resolve '%s' as a valid ref.", object_ref);
460 if (snprintf(ref, sizeof(ref), "refs/tags/%s", tag) > sizeof(ref) - 1)
461 die("tag name too long: %.*s...", 50, tag);
462 if (check_ref_format(ref))
463 die("'%s' is not a valid tag name.", tag);
465 if (!resolve_ref(ref, prev, 1, NULL))
466 hashclr(prev);
467 else if (!force)
468 die("tag '%s' already exists", tag);
470 if (annotate)
471 create_tag(object, tag, &buf, msg.given || msgfile,
472 sign, prev, object);
474 lock = lock_any_ref_for_update(ref, prev, 0);
475 if (!lock)
476 die("%s: cannot lock the ref", ref);
477 if (write_ref_sha1(lock, object, NULL) < 0)
478 die("%s: cannot update the ref", ref);
480 strbuf_release(&buf);
481 return 0;