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