Merge branch 'js/mingw-load-sys-dll'
[git] / builtin / tag.c
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 "config.h"
11 #include "builtin.h"
12 #include "refs.h"
13 #include "object-store.h"
14 #include "tag.h"
15 #include "run-command.h"
16 #include "parse-options.h"
17 #include "diff.h"
18 #include "revision.h"
19 #include "gpg-interface.h"
20 #include "sha1-array.h"
21 #include "column.h"
22 #include "ref-filter.h"
23
24 static const char * const git_tag_usage[] = {
25         N_("git tag [-a | -s | -u <key-id>] [-f] [-m <msg> | -F <file>] <tagname> [<head>]"),
26         N_("git tag -d <tagname>..."),
27         N_("git tag -l [-n[<num>]] [--contains <commit>] [--no-contains <commit>] [--points-at <object>]"
28                 "\n\t\t[--format=<format>] [--[no-]merged [<commit>]] [<pattern>...]"),
29         N_("git tag -v [--format=<format>] <tagname>..."),
30         NULL
31 };
32
33 static unsigned int colopts;
34 static int force_sign_annotate;
35
36 static int list_tags(struct ref_filter *filter, struct ref_sorting *sorting,
37                      struct ref_format *format)
38 {
39         struct ref_array array;
40         char *to_free = NULL;
41         int i;
42
43         memset(&array, 0, sizeof(array));
44
45         if (filter->lines == -1)
46                 filter->lines = 0;
47
48         if (!format->format) {
49                 if (filter->lines) {
50                         to_free = xstrfmt("%s %%(contents:lines=%d)",
51                                           "%(align:15)%(refname:lstrip=2)%(end)",
52                                           filter->lines);
53                         format->format = to_free;
54                 } else
55                         format->format = "%(refname:lstrip=2)";
56         }
57
58         if (verify_ref_format(format))
59                 die(_("unable to parse format string"));
60         filter->with_commit_tag_algo = 1;
61         filter_refs(&array, filter, FILTER_REFS_TAGS);
62         ref_array_sort(sorting, &array);
63
64         for (i = 0; i < array.nr; i++)
65                 show_ref_array_item(array.items[i], format);
66         ref_array_clear(&array);
67         free(to_free);
68
69         return 0;
70 }
71
72 typedef int (*each_tag_name_fn)(const char *name, const char *ref,
73                                 const struct object_id *oid, const void *cb_data);
74
75 static int for_each_tag_name(const char **argv, each_tag_name_fn fn,
76                              const void *cb_data)
77 {
78         const char **p;
79         struct strbuf ref = STRBUF_INIT;
80         int had_error = 0;
81         struct object_id oid;
82
83         for (p = argv; *p; p++) {
84                 strbuf_reset(&ref);
85                 strbuf_addf(&ref, "refs/tags/%s", *p);
86                 if (read_ref(ref.buf, &oid)) {
87                         error(_("tag '%s' not found."), *p);
88                         had_error = 1;
89                         continue;
90                 }
91                 if (fn(*p, ref.buf, &oid, cb_data))
92                         had_error = 1;
93         }
94         strbuf_release(&ref);
95         return had_error;
96 }
97
98 static int delete_tag(const char *name, const char *ref,
99                       const struct object_id *oid, const void *cb_data)
100 {
101         if (delete_ref(NULL, ref, oid, 0))
102                 return 1;
103         printf(_("Deleted tag '%s' (was %s)\n"), name,
104                find_unique_abbrev(oid, DEFAULT_ABBREV));
105         return 0;
106 }
107
108 static int verify_tag(const char *name, const char *ref,
109                       const struct object_id *oid, const void *cb_data)
110 {
111         int flags;
112         const struct ref_format *format = cb_data;
113         flags = GPG_VERIFY_VERBOSE;
114
115         if (format->format)
116                 flags = GPG_VERIFY_OMIT_STATUS;
117
118         if (gpg_verify_tag(oid, name, flags))
119                 return -1;
120
121         if (format->format)
122                 pretty_print_ref(name, oid, format);
123
124         return 0;
125 }
126
127 static int do_sign(struct strbuf *buffer)
128 {
129         return sign_buffer(buffer, buffer, get_signing_key());
130 }
131
132 static const char tag_template[] =
133         N_("\nWrite a message for tag:\n  %s\n"
134         "Lines starting with '%c' will be ignored.\n");
135
136 static const char tag_template_nocleanup[] =
137         N_("\nWrite a message for tag:\n  %s\n"
138         "Lines starting with '%c' will be kept; you may remove them"
139         " yourself if you want to.\n");
140
141 static int git_tag_config(const char *var, const char *value, void *cb)
142 {
143         int status;
144         struct ref_sorting **sorting_tail = (struct ref_sorting **)cb;
145
146         if (!strcmp(var, "tag.sort")) {
147                 if (!value)
148                         return config_error_nonbool(var);
149                 parse_ref_sorting(sorting_tail, value);
150                 return 0;
151         }
152
153         status = git_gpg_config(var, value, cb);
154         if (status)
155                 return status;
156         if (!strcmp(var, "tag.forcesignannotated")) {
157                 force_sign_annotate = git_config_bool(var, value);
158                 return 0;
159         }
160
161         if (starts_with(var, "column."))
162                 return git_column_config(var, value, "tag", &colopts);
163         return git_color_default_config(var, value, cb);
164 }
165
166 static void write_tag_body(int fd, const struct object_id *oid)
167 {
168         unsigned long size;
169         enum object_type type;
170         char *buf, *sp;
171
172         buf = read_object_file(oid, &type, &size);
173         if (!buf)
174                 return;
175         /* skip header */
176         sp = strstr(buf, "\n\n");
177
178         if (!sp || !size || type != OBJ_TAG) {
179                 free(buf);
180                 return;
181         }
182         sp += 2; /* skip the 2 LFs */
183         write_or_die(fd, sp, parse_signature(sp, buf + size - sp));
184
185         free(buf);
186 }
187
188 static int build_tag_object(struct strbuf *buf, int sign, struct object_id *result)
189 {
190         if (sign && do_sign(buf) < 0)
191                 return error(_("unable to sign the tag"));
192         if (write_object_file(buf->buf, buf->len, tag_type, result) < 0)
193                 return error(_("unable to write tag file"));
194         return 0;
195 }
196
197 struct create_tag_options {
198         unsigned int message_given:1;
199         unsigned int use_editor:1;
200         unsigned int sign;
201         enum {
202                 CLEANUP_NONE,
203                 CLEANUP_SPACE,
204                 CLEANUP_ALL
205         } cleanup_mode;
206 };
207
208 static void create_tag(const struct object_id *object, const char *tag,
209                        struct strbuf *buf, struct create_tag_options *opt,
210                        struct object_id *prev, struct object_id *result)
211 {
212         enum object_type type;
213         struct strbuf header = STRBUF_INIT;
214         char *path = NULL;
215
216         type = oid_object_info(the_repository, object, NULL);
217         if (type <= OBJ_NONE)
218             die(_("bad object type."));
219
220         strbuf_addf(&header,
221                     "object %s\n"
222                     "type %s\n"
223                     "tag %s\n"
224                     "tagger %s\n\n",
225                     oid_to_hex(object),
226                     type_name(type),
227                     tag,
228                     git_committer_info(IDENT_STRICT));
229
230         if (!opt->message_given || opt->use_editor) {
231                 int fd;
232
233                 /* write the template message before editing: */
234                 path = git_pathdup("TAG_EDITMSG");
235                 fd = open(path, O_CREAT | O_TRUNC | O_WRONLY, 0600);
236                 if (fd < 0)
237                         die_errno(_("could not create file '%s'"), path);
238
239                 if (opt->message_given) {
240                         write_or_die(fd, buf->buf, buf->len);
241                         strbuf_reset(buf);
242                 } else if (!is_null_oid(prev)) {
243                         write_tag_body(fd, prev);
244                 } else {
245                         struct strbuf buf = STRBUF_INIT;
246                         strbuf_addch(&buf, '\n');
247                         if (opt->cleanup_mode == CLEANUP_ALL)
248                                 strbuf_commented_addf(&buf, _(tag_template), tag, comment_line_char);
249                         else
250                                 strbuf_commented_addf(&buf, _(tag_template_nocleanup), tag, comment_line_char);
251                         write_or_die(fd, buf.buf, buf.len);
252                         strbuf_release(&buf);
253                 }
254                 close(fd);
255
256                 if (launch_editor(path, buf, NULL)) {
257                         fprintf(stderr,
258                         _("Please supply the message using either -m or -F option.\n"));
259                         exit(1);
260                 }
261         }
262
263         if (opt->cleanup_mode != CLEANUP_NONE)
264                 strbuf_stripspace(buf, opt->cleanup_mode == CLEANUP_ALL);
265
266         if (!opt->message_given && !buf->len)
267                 die(_("no tag message?"));
268
269         strbuf_insert(buf, 0, header.buf, header.len);
270         strbuf_release(&header);
271
272         if (build_tag_object(buf, opt->sign, result) < 0) {
273                 if (path)
274                         fprintf(stderr, _("The tag message has been left in %s\n"),
275                                 path);
276                 exit(128);
277         }
278         if (path) {
279                 unlink_or_warn(path);
280                 free(path);
281         }
282 }
283
284 static void create_reflog_msg(const struct object_id *oid, struct strbuf *sb)
285 {
286         enum object_type type;
287         struct commit *c;
288         char *buf;
289         unsigned long size;
290         int subject_len = 0;
291         const char *subject_start;
292
293         char *rla = getenv("GIT_REFLOG_ACTION");
294         if (rla) {
295                 strbuf_addstr(sb, rla);
296         } else {
297                 strbuf_addstr(sb, "tag: tagging ");
298                 strbuf_add_unique_abbrev(sb, oid, DEFAULT_ABBREV);
299         }
300
301         strbuf_addstr(sb, " (");
302         type = oid_object_info(the_repository, oid, NULL);
303         switch (type) {
304         default:
305                 strbuf_addstr(sb, "object of unknown type");
306                 break;
307         case OBJ_COMMIT:
308                 if ((buf = read_object_file(oid, &type, &size)) != NULL) {
309                         subject_len = find_commit_subject(buf, &subject_start);
310                         strbuf_insert(sb, sb->len, subject_start, subject_len);
311                 } else {
312                         strbuf_addstr(sb, "commit object");
313                 }
314                 free(buf);
315
316                 if ((c = lookup_commit_reference(the_repository, oid)) != NULL)
317                         strbuf_addf(sb, ", %s", show_date(c->date, 0, DATE_MODE(SHORT)));
318                 break;
319         case OBJ_TREE:
320                 strbuf_addstr(sb, "tree object");
321                 break;
322         case OBJ_BLOB:
323                 strbuf_addstr(sb, "blob object");
324                 break;
325         case OBJ_TAG:
326                 strbuf_addstr(sb, "other tag object");
327                 break;
328         }
329         strbuf_addch(sb, ')');
330 }
331
332 struct msg_arg {
333         int given;
334         struct strbuf buf;
335 };
336
337 static int parse_msg_arg(const struct option *opt, const char *arg, int unset)
338 {
339         struct msg_arg *msg = opt->value;
340
341         if (!arg)
342                 return -1;
343         if (msg->buf.len)
344                 strbuf_addstr(&(msg->buf), "\n\n");
345         strbuf_addstr(&(msg->buf), arg);
346         msg->given = 1;
347         return 0;
348 }
349
350 static int strbuf_check_tag_ref(struct strbuf *sb, const char *name)
351 {
352         if (name[0] == '-')
353                 return -1;
354
355         strbuf_reset(sb);
356         strbuf_addf(sb, "refs/tags/%s", name);
357
358         return check_refname_format(sb->buf, 0);
359 }
360
361 int cmd_tag(int argc, const char **argv, const char *prefix)
362 {
363         struct strbuf buf = STRBUF_INIT;
364         struct strbuf ref = STRBUF_INIT;
365         struct strbuf reflog_msg = STRBUF_INIT;
366         struct object_id object, prev;
367         const char *object_ref, *tag;
368         struct create_tag_options opt;
369         char *cleanup_arg = NULL;
370         int create_reflog = 0;
371         int annotate = 0, force = 0;
372         int cmdmode = 0, create_tag_object = 0;
373         const char *msgfile = NULL, *keyid = NULL;
374         struct msg_arg msg = { 0, STRBUF_INIT };
375         struct ref_transaction *transaction;
376         struct strbuf err = STRBUF_INIT;
377         struct ref_filter filter;
378         static struct ref_sorting *sorting = NULL, **sorting_tail = &sorting;
379         struct ref_format format = REF_FORMAT_INIT;
380         int icase = 0;
381         int edit_flag = 0;
382         struct option options[] = {
383                 OPT_CMDMODE('l', "list", &cmdmode, N_("list tag names"), 'l'),
384                 { OPTION_INTEGER, 'n', NULL, &filter.lines, N_("n"),
385                                 N_("print <n> lines of each tag message"),
386                                 PARSE_OPT_OPTARG, NULL, 1 },
387                 OPT_CMDMODE('d', "delete", &cmdmode, N_("delete tags"), 'd'),
388                 OPT_CMDMODE('v', "verify", &cmdmode, N_("verify tags"), 'v'),
389
390                 OPT_GROUP(N_("Tag creation options")),
391                 OPT_BOOL('a', "annotate", &annotate,
392                                         N_("annotated tag, needs a message")),
393                 OPT_CALLBACK('m', "message", &msg, N_("message"),
394                              N_("tag message"), parse_msg_arg),
395                 OPT_FILENAME('F', "file", &msgfile, N_("read message from file")),
396                 OPT_BOOL('e', "edit", &edit_flag, N_("force edit of tag message")),
397                 OPT_BOOL('s', "sign", &opt.sign, N_("annotated and GPG-signed tag")),
398                 OPT_STRING(0, "cleanup", &cleanup_arg, N_("mode"),
399                         N_("how to strip spaces and #comments from message")),
400                 OPT_STRING('u', "local-user", &keyid, N_("key-id"),
401                                         N_("use another key to sign the tag")),
402                 OPT__FORCE(&force, N_("replace the tag if exists"), 0),
403                 OPT_BOOL(0, "create-reflog", &create_reflog, N_("create a reflog")),
404
405                 OPT_GROUP(N_("Tag listing options")),
406                 OPT_COLUMN(0, "column", &colopts, N_("show tag list in columns")),
407                 OPT_CONTAINS(&filter.with_commit, N_("print only tags that contain the commit")),
408                 OPT_NO_CONTAINS(&filter.no_commit, N_("print only tags that don't contain the commit")),
409                 OPT_WITH(&filter.with_commit, N_("print only tags that contain the commit")),
410                 OPT_WITHOUT(&filter.no_commit, N_("print only tags that don't contain the commit")),
411                 OPT_MERGED(&filter, N_("print only tags that are merged")),
412                 OPT_NO_MERGED(&filter, N_("print only tags that are not merged")),
413                 OPT_CALLBACK(0 , "sort", sorting_tail, N_("key"),
414                              N_("field name to sort on"), &parse_opt_ref_sorting),
415                 {
416                         OPTION_CALLBACK, 0, "points-at", &filter.points_at, N_("object"),
417                         N_("print only tags of the object"), PARSE_OPT_LASTARG_DEFAULT,
418                         parse_opt_object_name, (intptr_t) "HEAD"
419                 },
420                 OPT_STRING(  0 , "format", &format.format, N_("format"),
421                            N_("format to use for the output")),
422                 OPT__COLOR(&format.use_color, N_("respect format colors")),
423                 OPT_BOOL('i', "ignore-case", &icase, N_("sorting and filtering are case insensitive")),
424                 OPT_END()
425         };
426
427         setup_ref_filter_porcelain_msg();
428
429         git_config(git_tag_config, sorting_tail);
430
431         memset(&opt, 0, sizeof(opt));
432         memset(&filter, 0, sizeof(filter));
433         filter.lines = -1;
434
435         argc = parse_options(argc, argv, prefix, options, git_tag_usage, 0);
436
437         if (keyid) {
438                 opt.sign = 1;
439                 set_signing_key(keyid);
440         }
441         create_tag_object = (opt.sign || annotate || msg.given || msgfile);
442
443         if (!cmdmode) {
444                 if (argc == 0)
445                         cmdmode = 'l';
446                 else if (filter.with_commit || filter.no_commit ||
447                          filter.points_at.nr || filter.merge_commit ||
448                          filter.lines != -1)
449                         cmdmode = 'l';
450         }
451
452         if (cmdmode == 'l')
453                 setup_auto_pager("tag", 1);
454
455         if ((create_tag_object || force) && (cmdmode != 0))
456                 usage_with_options(git_tag_usage, options);
457
458         finalize_colopts(&colopts, -1);
459         if (cmdmode == 'l' && filter.lines != -1) {
460                 if (explicitly_enable_column(colopts))
461                         die(_("--column and -n are incompatible"));
462                 colopts = 0;
463         }
464         if (!sorting)
465                 sorting = ref_default_sorting();
466         sorting->ignore_case = icase;
467         filter.ignore_case = icase;
468         if (cmdmode == 'l') {
469                 int ret;
470                 if (column_active(colopts)) {
471                         struct column_options copts;
472                         memset(&copts, 0, sizeof(copts));
473                         copts.padding = 2;
474                         run_column_filter(colopts, &copts);
475                 }
476                 filter.name_patterns = argv;
477                 ret = list_tags(&filter, sorting, &format);
478                 if (column_active(colopts))
479                         stop_column_filter();
480                 return ret;
481         }
482         if (filter.lines != -1)
483                 die(_("-n option is only allowed in list mode"));
484         if (filter.with_commit)
485                 die(_("--contains option is only allowed in list mode"));
486         if (filter.no_commit)
487                 die(_("--no-contains option is only allowed in list mode"));
488         if (filter.points_at.nr)
489                 die(_("--points-at option is only allowed in list mode"));
490         if (filter.merge_commit)
491                 die(_("--merged and --no-merged options are only allowed in list mode"));
492         if (cmdmode == 'd')
493                 return for_each_tag_name(argv, delete_tag, NULL);
494         if (cmdmode == 'v') {
495                 if (format.format && verify_ref_format(&format))
496                         usage_with_options(git_tag_usage, options);
497                 return for_each_tag_name(argv, verify_tag, &format);
498         }
499
500         if (msg.given || msgfile) {
501                 if (msg.given && msgfile)
502                         die(_("only one -F or -m option is allowed."));
503                 if (msg.given)
504                         strbuf_addbuf(&buf, &(msg.buf));
505                 else {
506                         if (!strcmp(msgfile, "-")) {
507                                 if (strbuf_read(&buf, 0, 1024) < 0)
508                                         die_errno(_("cannot read '%s'"), msgfile);
509                         } else {
510                                 if (strbuf_read_file(&buf, msgfile, 1024) < 0)
511                                         die_errno(_("could not open or read '%s'"),
512                                                 msgfile);
513                         }
514                 }
515         }
516
517         tag = argv[0];
518
519         object_ref = argc == 2 ? argv[1] : "HEAD";
520         if (argc > 2)
521                 die(_("too many params"));
522
523         if (get_oid(object_ref, &object))
524                 die(_("Failed to resolve '%s' as a valid ref."), object_ref);
525
526         if (strbuf_check_tag_ref(&ref, tag))
527                 die(_("'%s' is not a valid tag name."), tag);
528
529         if (read_ref(ref.buf, &prev))
530                 oidclr(&prev);
531         else if (!force)
532                 die(_("tag '%s' already exists"), tag);
533
534         opt.message_given = msg.given || msgfile;
535         opt.use_editor = edit_flag;
536
537         if (!cleanup_arg || !strcmp(cleanup_arg, "strip"))
538                 opt.cleanup_mode = CLEANUP_ALL;
539         else if (!strcmp(cleanup_arg, "verbatim"))
540                 opt.cleanup_mode = CLEANUP_NONE;
541         else if (!strcmp(cleanup_arg, "whitespace"))
542                 opt.cleanup_mode = CLEANUP_SPACE;
543         else
544                 die(_("Invalid cleanup mode %s"), cleanup_arg);
545
546         create_reflog_msg(&object, &reflog_msg);
547
548         if (create_tag_object) {
549                 if (force_sign_annotate && !annotate)
550                         opt.sign = 1;
551                 create_tag(&object, tag, &buf, &opt, &prev, &object);
552         }
553
554         transaction = ref_transaction_begin(&err);
555         if (!transaction ||
556             ref_transaction_update(transaction, ref.buf, &object, &prev,
557                                    create_reflog ? REF_FORCE_CREATE_REFLOG : 0,
558                                    reflog_msg.buf, &err) ||
559             ref_transaction_commit(transaction, &err))
560                 die("%s", err.buf);
561         ref_transaction_free(transaction);
562         if (force && !is_null_oid(&prev) && !oideq(&prev, &object))
563                 printf(_("Updated tag '%s' (was %s)\n"), tag,
564                        find_unique_abbrev(&prev, DEFAULT_ABBREV));
565
566         UNLEAK(buf);
567         UNLEAK(ref);
568         UNLEAK(reflog_msg);
569         UNLEAK(msg);
570         UNLEAK(err);
571         return 0;
572 }