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 "advice.h"
  11 #include "config.h"
  12 #include "builtin.h"
  13 #include "editor.h"
  14 #include "environment.h"
  15 #include "gettext.h"
  16 #include "hex.h"
  17 #include "refs.h"
  18 #include "object-name.h"
  19 #include "object-store.h"
  20 #include "tag.h"
  21 #include "run-command.h"
  22 #include "parse-options.h"
  23 #include "diff.h"
  24 #include "revision.h"
  25 #include "gpg-interface.h"
  26 #include "oid-array.h"
  27 #include "column.h"
  28 #include "ref-filter.h"
  29 #include "date.h"
  30 #include "write-or-die.h"
  31
  32 static const char * const git_tag_usage[] = {
  33         N_("git tag [-a | -s | -u <key-id>] [-f] [-m <msg> | -F <file>] [-e]\n"
  34            "        <tagname> [<commit> | <object>]"),
  35         N_("git tag -d <tagname>..."),
  36         N_("git tag [-n[<num>]] -l [--contains <commit>] [--no-contains <commit>]\n"
  37            "        [--points-at <object>] [--column[=<options>] | --no-column]\n"
  38            "        [--create-reflog] [--sort=<key>] [--format=<format>]\n"
  39            "        [--merged <commit>] [--no-merged <commit>] [<pattern>...]"),
  40         N_("git tag -v [--format=<format>] <tagname>..."),
  41         NULL
  42 };
  43
  44 static unsigned int colopts;
  45 static int force_sign_annotate;
  46 static int config_sign_tag = -1; /* unspecified */
  47 static int omit_empty = 0;
  48
  49 static int list_tags(struct ref_filter *filter, struct ref_sorting *sorting,
  50                      struct ref_format *format)
  51 {
  52         struct ref_array array;
  53         struct strbuf output = STRBUF_INIT;
  54         struct strbuf err = STRBUF_INIT;
  55         char *to_free = NULL;
  56         int i;
  57
  58         memset(&array, 0, sizeof(array));
  59
  60         if (filter->lines == -1)
  61                 filter->lines = 0;
  62
  63         if (!format->format) {
  64                 if (filter->lines) {
  65                         to_free = xstrfmt("%s %%(contents:lines=%d)",
  66                                           "%(align:15)%(refname:lstrip=2)%(end)",
  67                                           filter->lines);
  68                         format->format = to_free;
  69                 } else
  70                         format->format = "%(refname:lstrip=2)";
  71         }
  72
  73         if (verify_ref_format(format))
  74                 die(_("unable to parse format string"));
  75         filter->with_commit_tag_algo = 1;
  76         filter_refs(&array, filter, FILTER_REFS_TAGS);
  77         filter_ahead_behind(the_repository, format, &array);
  78         ref_array_sort(sorting, &array);
  79
  80         for (i = 0; i < array.nr; i++) {
  81                 strbuf_reset(&output);
  82                 strbuf_reset(&err);
  83                 if (format_ref_array_item(array.items[i], format, &output, &err))
  84                         die("%s", err.buf);
  85                 fwrite(output.buf, 1, output.len, stdout);
  86                 if (output.len || !omit_empty)
  87                         putchar('\n');
  88         }
  89
  90         strbuf_release(&err);
  91         strbuf_release(&output);
  92         ref_array_clear(&array);
  93         free(to_free);
  94
  95         return 0;
  96 }
  97
  98 typedef int (*each_tag_name_fn)(const char *name, const char *ref,
  99                                 const struct object_id *oid, void *cb_data);
 100
 101 static int for_each_tag_name(const char **argv, each_tag_name_fn fn,
 102                              void *cb_data)
 103 {
 104         const char **p;
 105         struct strbuf ref = STRBUF_INIT;
 106         int had_error = 0;
 107         struct object_id oid;
 108
 109         for (p = argv; *p; p++) {
 110                 strbuf_reset(&ref);
 111                 strbuf_addf(&ref, "refs/tags/%s", *p);
 112                 if (read_ref(ref.buf, &oid)) {
 113                         error(_("tag '%s' not found."), *p);
 114                         had_error = 1;
 115                         continue;
 116                 }
 117                 if (fn(*p, ref.buf, &oid, cb_data))
 118                         had_error = 1;
 119         }
 120         strbuf_release(&ref);
 121         return had_error;
 122 }
 123
 124 static int collect_tags(const char *name, const char *ref,
 125                         const struct object_id *oid, void *cb_data)
 126 {
 127         struct string_list *ref_list = cb_data;
 128
 129         string_list_append(ref_list, ref);
 130         ref_list->items[ref_list->nr - 1].util = oiddup(oid);
 131         return 0;
 132 }
 133
 134 static int delete_tags(const char **argv)
 135 {
 136         int result;
 137         struct string_list refs_to_delete = STRING_LIST_INIT_DUP;
 138         struct string_list_item *item;
 139
 140         result = for_each_tag_name(argv, collect_tags, (void *)&refs_to_delete);
 141         if (delete_refs(NULL, &refs_to_delete, REF_NO_DEREF))
 142                 result = 1;
 143
 144         for_each_string_list_item(item, &refs_to_delete) {
 145                 const char *name = item->string;
 146                 struct object_id *oid = item->util;
 147                 if (!ref_exists(name))
 148                         printf(_("Deleted tag '%s' (was %s)\n"),
 149                                 item->string + 10,
 150                                 repo_find_unique_abbrev(the_repository, oid, DEFAULT_ABBREV));
 151
 152                 free(oid);
 153         }
 154         string_list_clear(&refs_to_delete, 0);
 155         return result;
 156 }
 157
 158 static int verify_tag(const char *name, const char *ref,
 159                       const struct object_id *oid, void *cb_data)
 160 {
 161         int flags;
 162         struct ref_format *format = cb_data;
 163         flags = GPG_VERIFY_VERBOSE;
 164
 165         if (format->format)
 166                 flags = GPG_VERIFY_OMIT_STATUS;
 167
 168         if (gpg_verify_tag(oid, name, flags))
 169                 return -1;
 170
 171         if (format->format)
 172                 pretty_print_ref(name, oid, format);
 173
 174         return 0;
 175 }
 176
 177 static int do_sign(struct strbuf *buffer)
 178 {
 179         return sign_buffer(buffer, buffer, get_signing_key());
 180 }
 181
 182 static const char tag_template[] =
 183         N_("\nWrite a message for tag:\n  %s\n"
 184         "Lines starting with '%c' will be ignored.\n");
 185
 186 static const char tag_template_nocleanup[] =
 187         N_("\nWrite a message for tag:\n  %s\n"
 188         "Lines starting with '%c' will be kept; you may remove them"
 189         " yourself if you want to.\n");
 190
 191 static int git_tag_config(const char *var, const char *value, void *cb)
 192 {
 193         if (!strcmp(var, "tag.gpgsign")) {
 194                 config_sign_tag = git_config_bool(var, value);
 195                 return 0;
 196         }
 197
 198         if (!strcmp(var, "tag.sort")) {
 199                 if (!value)
 200                         return config_error_nonbool(var);
 201                 string_list_append(cb, value);
 202                 return 0;
 203         }
 204
 205         if (!strcmp(var, "tag.forcesignannotated")) {
 206                 force_sign_annotate = git_config_bool(var, value);
 207                 return 0;
 208         }
 209
 210         if (starts_with(var, "column."))
 211                 return git_column_config(var, value, "tag", &colopts);
 212         return git_color_default_config(var, value, cb);
 213 }
 214
 215 static void write_tag_body(int fd, const struct object_id *oid)
 216 {
 217         unsigned long size;
 218         enum object_type type;
 219         char *buf, *sp, *orig;
 220         struct strbuf payload = STRBUF_INIT;
 221         struct strbuf signature = STRBUF_INIT;
 222
 223         orig = buf = repo_read_object_file(the_repository, oid, &type, &size);
 224         if (!buf)
 225                 return;
 226         if (parse_signature(buf, size, &payload, &signature)) {
 227                 buf = payload.buf;
 228                 size = payload.len;
 229         }
 230         /* skip header */
 231         sp = strstr(buf, "\n\n");
 232
 233         if (!sp || !size || type != OBJ_TAG) {
 234                 free(buf);
 235                 return;
 236         }
 237         sp += 2; /* skip the 2 LFs */
 238         write_or_die(fd, sp, buf + size - sp);
 239
 240         free(orig);
 241         strbuf_release(&payload);
 242         strbuf_release(&signature);
 243 }
 244
 245 static int build_tag_object(struct strbuf *buf, int sign, struct object_id *result)
 246 {
 247         if (sign && do_sign(buf) < 0)
 248                 return error(_("unable to sign the tag"));
 249         if (write_object_file(buf->buf, buf->len, OBJ_TAG, result) < 0)
 250                 return error(_("unable to write tag file"));
 251         return 0;
 252 }
 253
 254 struct create_tag_options {
 255         unsigned int message_given:1;
 256         unsigned int use_editor:1;
 257         unsigned int sign;
 258         enum {
 259                 CLEANUP_NONE,
 260                 CLEANUP_SPACE,
 261                 CLEANUP_ALL
 262         } cleanup_mode;
 263 };
 264
 265 static const char message_advice_nested_tag[] =
 266         N_("You have created a nested tag. The object referred to by your new tag is\n"
 267            "already a tag. If you meant to tag the object that it points to, use:\n"
 268            "\n"
 269            "\tgit tag -f %s %s^{}");
 270
 271 static void create_tag(const struct object_id *object, const char *object_ref,
 272                        const char *tag,
 273                        struct strbuf *buf, struct create_tag_options *opt,
 274                        struct object_id *prev, struct object_id *result, char *path)
 275 {
 276         enum object_type type;
 277         struct strbuf header = STRBUF_INIT;
 278
 279         type = oid_object_info(the_repository, object, NULL);
 280         if (type <= OBJ_NONE)
 281                 die(_("bad object type."));
 282
 283         if (type == OBJ_TAG)
 284                 advise_if_enabled(ADVICE_NESTED_TAG, _(message_advice_nested_tag),
 285                                   tag, object_ref);
 286
 287         strbuf_addf(&header,
 288                     "object %s\n"
 289                     "type %s\n"
 290                     "tag %s\n"
 291                     "tagger %s\n\n",
 292                     oid_to_hex(object),
 293                     type_name(type),
 294                     tag,
 295                     git_committer_info(IDENT_STRICT));
 296
 297         if (!opt->message_given || opt->use_editor) {
 298                 int fd;
 299
 300                 /* write the template message before editing: */
 301                 fd = xopen(path, O_CREAT | O_TRUNC | O_WRONLY, 0600);
 302
 303                 if (opt->message_given) {
 304                         write_or_die(fd, buf->buf, buf->len);
 305                         strbuf_reset(buf);
 306                 } else if (!is_null_oid(prev)) {
 307                         write_tag_body(fd, prev);
 308                 } else {
 309                         struct strbuf buf = STRBUF_INIT;
 310                         strbuf_addch(&buf, '\n');
 311                         if (opt->cleanup_mode == CLEANUP_ALL)
 312                                 strbuf_commented_addf(&buf, _(tag_template), tag, comment_line_char);
 313                         else
 314                                 strbuf_commented_addf(&buf, _(tag_template_nocleanup), tag, comment_line_char);
 315                         write_or_die(fd, buf.buf, buf.len);
 316                         strbuf_release(&buf);
 317                 }
 318                 close(fd);
 319
 320                 if (launch_editor(path, buf, NULL)) {
 321                         fprintf(stderr,
 322                         _("Please supply the message using either -m or -F option.\n"));
 323                         exit(1);
 324                 }
 325         }
 326
 327         if (opt->cleanup_mode != CLEANUP_NONE)
 328                 strbuf_stripspace(buf, opt->cleanup_mode == CLEANUP_ALL);
 329
 330         if (!opt->message_given && !buf->len)
 331                 die(_("no tag message?"));
 332
 333         strbuf_insert(buf, 0, header.buf, header.len);
 334         strbuf_release(&header);
 335
 336         if (build_tag_object(buf, opt->sign, result) < 0) {
 337                 if (path)
 338                         fprintf(stderr, _("The tag message has been left in %s\n"),
 339                                 path);
 340                 exit(128);
 341         }
 342 }
 343
 344 static void create_reflog_msg(const struct object_id *oid, struct strbuf *sb)
 345 {
 346         enum object_type type;
 347         struct commit *c;
 348         char *buf;
 349         unsigned long size;
 350         int subject_len = 0;
 351         const char *subject_start;
 352
 353         char *rla = getenv("GIT_REFLOG_ACTION");
 354         if (rla) {
 355                 strbuf_addstr(sb, rla);
 356         } else {
 357                 strbuf_addstr(sb, "tag: tagging ");
 358                 strbuf_add_unique_abbrev(sb, oid, DEFAULT_ABBREV);
 359         }
 360
 361         strbuf_addstr(sb, " (");
 362         type = oid_object_info(the_repository, oid, NULL);
 363         switch (type) {
 364         default:
 365                 strbuf_addstr(sb, "object of unknown type");
 366                 break;
 367         case OBJ_COMMIT:
 368                 if ((buf = repo_read_object_file(the_repository, oid, &type, &size))) {
 369                         subject_len = find_commit_subject(buf, &subject_start);
 370                         strbuf_insert(sb, sb->len, subject_start, subject_len);
 371                 } else {
 372                         strbuf_addstr(sb, "commit object");
 373                 }
 374                 free(buf);
 375
 376                 if ((c = lookup_commit_reference(the_repository, oid)))
 377                         strbuf_addf(sb, ", %s", show_date(c->date, 0, DATE_MODE(SHORT)));
 378                 break;
 379         case OBJ_TREE:
 380                 strbuf_addstr(sb, "tree object");
 381                 break;
 382         case OBJ_BLOB:
 383                 strbuf_addstr(sb, "blob object");
 384                 break;
 385         case OBJ_TAG:
 386                 strbuf_addstr(sb, "other tag object");
 387                 break;
 388         }
 389         strbuf_addch(sb, ')');
 390 }
 391
 392 struct msg_arg {
 393         int given;
 394         struct strbuf buf;
 395 };
 396
 397 static int parse_msg_arg(const struct option *opt, const char *arg, int unset)
 398 {
 399         struct msg_arg *msg = opt->value;
 400
 401         BUG_ON_OPT_NEG(unset);
 402
 403         if (!arg)
 404                 return -1;
 405         if (msg->buf.len)
 406                 strbuf_addstr(&(msg->buf), "\n\n");
 407         strbuf_addstr(&(msg->buf), arg);
 408         msg->given = 1;
 409         return 0;
 410 }
 411
 412 static int strbuf_check_tag_ref(struct strbuf *sb, const char *name)
 413 {
 414         if (name[0] == '-')
 415                 return -1;
 416
 417         strbuf_reset(sb);
 418         strbuf_addf(sb, "refs/tags/%s", name);
 419
 420         return check_refname_format(sb->buf, 0);
 421 }
 422
 423 int cmd_tag(int argc, const char **argv, const char *prefix)
 424 {
 425         struct strbuf buf = STRBUF_INIT;
 426         struct strbuf ref = STRBUF_INIT;
 427         struct strbuf reflog_msg = STRBUF_INIT;
 428         struct object_id object, prev;
 429         const char *object_ref, *tag;
 430         struct create_tag_options opt;
 431         char *cleanup_arg = NULL;
 432         int create_reflog = 0;
 433         int annotate = 0, force = 0;
 434         int cmdmode = 0, create_tag_object = 0;
 435         char *msgfile = NULL;
 436         const char *keyid = NULL;
 437         struct msg_arg msg = { .buf = STRBUF_INIT };
 438         struct ref_transaction *transaction;
 439         struct strbuf err = STRBUF_INIT;
 440         struct ref_filter filter;
 441         struct ref_sorting *sorting;
 442         struct string_list sorting_options = STRING_LIST_INIT_DUP;
 443         struct ref_format format = REF_FORMAT_INIT;
 444         int icase = 0;
 445         int edit_flag = 0;
 446         struct option options[] = {
 447                 OPT_CMDMODE('l', "list", &cmdmode, N_("list tag names"), 'l'),
 448                 { OPTION_INTEGER, 'n', NULL, &filter.lines, N_("n"),
 449                                 N_("print <n> lines of each tag message"),
 450                                 PARSE_OPT_OPTARG, NULL, 1 },
 451                 OPT_CMDMODE('d', "delete", &cmdmode, N_("delete tags"), 'd'),
 452                 OPT_CMDMODE('v', "verify", &cmdmode, N_("verify tags"), 'v'),
 453
 454                 OPT_GROUP(N_("Tag creation options")),
 455                 OPT_BOOL('a', "annotate", &annotate,
 456                                         N_("annotated tag, needs a message")),
 457                 OPT_CALLBACK_F('m', "message", &msg, N_("message"),
 458                                N_("tag message"), PARSE_OPT_NONEG, parse_msg_arg),
 459                 OPT_FILENAME('F', "file", &msgfile, N_("read message from file")),
 460                 OPT_BOOL('e', "edit", &edit_flag, N_("force edit of tag message")),
 461                 OPT_BOOL('s', "sign", &opt.sign, N_("annotated and GPG-signed tag")),
 462                 OPT_CLEANUP(&cleanup_arg),
 463                 OPT_STRING('u', "local-user", &keyid, N_("key-id"),
 464                                         N_("use another key to sign the tag")),
 465                 OPT__FORCE(&force, N_("replace the tag if exists"), 0),
 466                 OPT_BOOL(0, "create-reflog", &create_reflog, N_("create a reflog")),
 467
 468                 OPT_GROUP(N_("Tag listing options")),
 469                 OPT_COLUMN(0, "column", &colopts, N_("show tag list in columns")),
 470                 OPT_CONTAINS(&filter.with_commit, N_("print only tags that contain the commit")),
 471                 OPT_NO_CONTAINS(&filter.no_commit, N_("print only tags that don't contain the commit")),
 472                 OPT_WITH(&filter.with_commit, N_("print only tags that contain the commit")),
 473                 OPT_WITHOUT(&filter.no_commit, N_("print only tags that don't contain the commit")),
 474                 OPT_MERGED(&filter, N_("print only tags that are merged")),
 475                 OPT_NO_MERGED(&filter, N_("print only tags that are not merged")),
 476                 OPT_BOOL(0, "omit-empty",  &omit_empty,
 477                         N_("do not output a newline after empty formatted refs")),
 478                 OPT_REF_SORT(&sorting_options),
 479                 {
 480                         OPTION_CALLBACK, 0, "points-at", &filter.points_at, N_("object"),
 481                         N_("print only tags of the object"), PARSE_OPT_LASTARG_DEFAULT,
 482                         parse_opt_object_name, (intptr_t) "HEAD"
 483                 },
 484                 OPT_STRING(  0 , "format", &format.format, N_("format"),
 485                            N_("format to use for the output")),
 486                 OPT__COLOR(&format.use_color, N_("respect format colors")),
 487                 OPT_BOOL('i', "ignore-case", &icase, N_("sorting and filtering are case insensitive")),
 488                 OPT_END()
 489         };
 490         int ret = 0;
 491         const char *only_in_list = NULL;
 492         char *path = NULL;
 493
 494         setup_ref_filter_porcelain_msg();
 495
 496         git_config(git_tag_config, &sorting_options);
 497
 498         memset(&opt, 0, sizeof(opt));
 499         memset(&filter, 0, sizeof(filter));
 500         filter.lines = -1;
 501         opt.sign = -1;
 502
 503         argc = parse_options(argc, argv, prefix, options, git_tag_usage, 0);
 504
 505         if (!cmdmode) {
 506                 if (argc == 0)
 507                         cmdmode = 'l';
 508                 else if (filter.with_commit || filter.no_commit ||
 509                          filter.reachable_from || filter.unreachable_from ||
 510                          filter.points_at.nr || filter.lines != -1)
 511                         cmdmode = 'l';
 512         }
 513
 514         if (cmdmode == 'l')
 515                 setup_auto_pager("tag", 1);
 516
 517         if (opt.sign == -1)
 518                 opt.sign = cmdmode ? 0 : config_sign_tag > 0;
 519
 520         if (keyid) {
 521                 opt.sign = 1;
 522                 set_signing_key(keyid);
 523         }
 524         create_tag_object = (opt.sign || annotate || msg.given || msgfile);
 525
 526         if ((create_tag_object || force) && (cmdmode != 0))
 527                 usage_with_options(git_tag_usage, options);
 528
 529         finalize_colopts(&colopts, -1);
 530         if (cmdmode == 'l' && filter.lines != -1) {
 531                 if (explicitly_enable_column(colopts))
 532                         die(_("options '%s' and '%s' cannot be used together"), "--column", "-n");
 533                 colopts = 0;
 534         }
 535         sorting = ref_sorting_options(&sorting_options);
 536         ref_sorting_set_sort_flags_all(sorting, REF_SORTING_ICASE, icase);
 537         filter.ignore_case = icase;
 538         if (cmdmode == 'l') {
 539                 if (column_active(colopts)) {
 540                         struct column_options copts;
 541                         memset(&copts, 0, sizeof(copts));
 542                         copts.padding = 2;
 543                         run_column_filter(colopts, &copts);
 544                 }
 545                 filter.name_patterns = argv;
 546                 ret = list_tags(&filter, sorting, &format);
 547                 if (column_active(colopts))
 548                         stop_column_filter();
 549                 goto cleanup;
 550         }
 551         if (filter.lines != -1)
 552                 only_in_list = "-n";
 553         else if (filter.with_commit)
 554                 only_in_list = "--contains";
 555         else if (filter.no_commit)
 556                 only_in_list = "--no-contains";
 557         else if (filter.points_at.nr)
 558                 only_in_list = "--points-at";
 559         else if (filter.reachable_from)
 560                 only_in_list = "--merged";
 561         else if (filter.unreachable_from)
 562                 only_in_list = "--no-merged";
 563         if (only_in_list)
 564                 die(_("the '%s' option is only allowed in list mode"), only_in_list);
 565         if (cmdmode == 'd') {
 566                 ret = delete_tags(argv);
 567                 goto cleanup;
 568         }
 569         if (cmdmode == 'v') {
 570                 if (format.format && verify_ref_format(&format))
 571                         usage_with_options(git_tag_usage, options);
 572                 ret = for_each_tag_name(argv, verify_tag, &format);
 573                 goto cleanup;
 574         }
 575
 576         if (msg.given || msgfile) {
 577                 if (msg.given && msgfile)
 578                         die(_("options '%s' and '%s' cannot be used together"), "-F", "-m");
 579                 if (msg.given)
 580                         strbuf_addbuf(&buf, &(msg.buf));
 581                 else {
 582                         if (!strcmp(msgfile, "-")) {
 583                                 if (strbuf_read(&buf, 0, 1024) < 0)
 584                                         die_errno(_("cannot read '%s'"), msgfile);
 585                         } else {
 586                                 if (strbuf_read_file(&buf, msgfile, 1024) < 0)
 587                                         die_errno(_("could not open or read '%s'"),
 588                                                 msgfile);
 589                         }
 590                 }
 591         }
 592
 593         tag = argv[0];
 594
 595         object_ref = argc == 2 ? argv[1] : "HEAD";
 596         if (argc > 2)
 597                 die(_("too many arguments"));
 598
 599         if (repo_get_oid(the_repository, object_ref, &object))
 600                 die(_("Failed to resolve '%s' as a valid ref."), object_ref);
 601
 602         if (strbuf_check_tag_ref(&ref, tag))
 603                 die(_("'%s' is not a valid tag name."), tag);
 604
 605         if (read_ref(ref.buf, &prev))
 606                 oidclr(&prev);
 607         else if (!force)
 608                 die(_("tag '%s' already exists"), tag);
 609
 610         opt.message_given = msg.given || msgfile;
 611         opt.use_editor = edit_flag;
 612
 613         if (!cleanup_arg || !strcmp(cleanup_arg, "strip"))
 614                 opt.cleanup_mode = CLEANUP_ALL;
 615         else if (!strcmp(cleanup_arg, "verbatim"))
 616                 opt.cleanup_mode = CLEANUP_NONE;
 617         else if (!strcmp(cleanup_arg, "whitespace"))
 618                 opt.cleanup_mode = CLEANUP_SPACE;
 619         else
 620                 die(_("Invalid cleanup mode %s"), cleanup_arg);
 621
 622         create_reflog_msg(&object, &reflog_msg);
 623
 624         if (create_tag_object) {
 625                 if (force_sign_annotate && !annotate)
 626                         opt.sign = 1;
 627                 path = git_pathdup("TAG_EDITMSG");
 628                 create_tag(&object, object_ref, tag, &buf, &opt, &prev, &object,
 629                            path);
 630         }
 631
 632         transaction = ref_transaction_begin(&err);
 633         if (!transaction ||
 634             ref_transaction_update(transaction, ref.buf, &object, &prev,
 635                                    create_reflog ? REF_FORCE_CREATE_REFLOG : 0,
 636                                    reflog_msg.buf, &err) ||
 637             ref_transaction_commit(transaction, &err)) {
 638                 if (path)
 639                         fprintf(stderr,
 640                                 _("The tag message has been left in %s\n"),
 641                                 path);
 642                 die("%s", err.buf);
 643         }
 644         if (path) {
 645                 unlink_or_warn(path);
 646                 free(path);
 647         }
 648         ref_transaction_free(transaction);
 649         if (force && !is_null_oid(&prev) && !oideq(&prev, &object))
 650                 printf(_("Updated tag '%s' (was %s)\n"), tag,
 651                        repo_find_unique_abbrev(the_repository, &prev, DEFAULT_ABBREV));
 652
 653 cleanup:
 654         ref_sorting_release(sorting);
 655         strbuf_release(&buf);
 656         strbuf_release(&ref);
 657         strbuf_release(&reflog_msg);
 658         strbuf_release(&msg.buf);
 659         strbuf_release(&err);
 660         free(msgfile);
 661         return ret;
 662 }