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 "builtin.h"
  10 #include "advice.h"
  11 #include "config.h"
  12 #include "editor.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-ll.h"
  19 #include "path.h"
  20 #include "tag.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 #include "object-file-convert.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
  48 static int list_tags(struct ref_filter *filter, struct ref_sorting *sorting,
  49                      struct ref_format *format)
  50 {
  51         char *to_free = NULL;
  52
  53         if (filter->lines == -1)
  54                 filter->lines = 0;
  55
  56         if (!format->format) {
  57                 if (filter->lines) {
  58                         to_free = xstrfmt("%s %%(contents:lines=%d)",
  59                                           "%(align:15)%(refname:lstrip=2)%(end)",
  60                                           filter->lines);
  61                         format->format = to_free;
  62                 } else
  63                         format->format = "%(refname:lstrip=2)";
  64         }
  65
  66         if (verify_ref_format(format))
  67                 die(_("unable to parse format string"));
  68         filter->with_commit_tag_algo = 1;
  69         filter_and_format_refs(filter, FILTER_REFS_TAGS, sorting, format);
  70
  71         free(to_free);
  72
  73         return 0;
  74 }
  75
  76 typedef int (*each_tag_name_fn)(const char *name, const char *ref,
  77                                 const struct object_id *oid, void *cb_data);
  78
  79 static int for_each_tag_name(const char **argv, each_tag_name_fn fn,
  80                              void *cb_data)
  81 {
  82         const char **p;
  83         struct strbuf ref = STRBUF_INIT;
  84         int had_error = 0;
  85         struct object_id oid;
  86
  87         for (p = argv; *p; p++) {
  88                 strbuf_reset(&ref);
  89                 strbuf_addf(&ref, "refs/tags/%s", *p);
  90                 if (read_ref(ref.buf, &oid)) {
  91                         error(_("tag '%s' not found."), *p);
  92                         had_error = 1;
  93                         continue;
  94                 }
  95                 if (fn(*p, ref.buf, &oid, cb_data))
  96                         had_error = 1;
  97         }
  98         strbuf_release(&ref);
  99         return had_error;
 100 }
 101
 102 static int collect_tags(const char *name UNUSED, const char *ref,
 103                         const struct object_id *oid, void *cb_data)
 104 {
 105         struct string_list *ref_list = cb_data;
 106
 107         string_list_append(ref_list, ref);
 108         ref_list->items[ref_list->nr - 1].util = oiddup(oid);
 109         return 0;
 110 }
 111
 112 static int delete_tags(const char **argv)
 113 {
 114         int result;
 115         struct string_list refs_to_delete = STRING_LIST_INIT_DUP;
 116         struct string_list_item *item;
 117
 118         result = for_each_tag_name(argv, collect_tags, (void *)&refs_to_delete);
 119         if (delete_refs(NULL, &refs_to_delete, REF_NO_DEREF))
 120                 result = 1;
 121
 122         for_each_string_list_item(item, &refs_to_delete) {
 123                 const char *name = item->string;
 124                 struct object_id *oid = item->util;
 125                 if (!ref_exists(name))
 126                         printf(_("Deleted tag '%s' (was %s)\n"),
 127                                 item->string + 10,
 128                                 repo_find_unique_abbrev(the_repository, oid, DEFAULT_ABBREV));
 129
 130                 free(oid);
 131         }
 132         string_list_clear(&refs_to_delete, 0);
 133         return result;
 134 }
 135
 136 static int verify_tag(const char *name, const char *ref UNUSED,
 137                       const struct object_id *oid, void *cb_data)
 138 {
 139         int flags;
 140         struct ref_format *format = cb_data;
 141         flags = GPG_VERIFY_VERBOSE;
 142
 143         if (format->format)
 144                 flags = GPG_VERIFY_OMIT_STATUS;
 145
 146         if (gpg_verify_tag(oid, name, flags))
 147                 return -1;
 148
 149         if (format->format)
 150                 pretty_print_ref(name, oid, format);
 151
 152         return 0;
 153 }
 154
 155 static int do_sign(struct strbuf *buffer, struct object_id **compat_oid,
 156                    struct object_id *compat_oid_buf)
 157 {
 158         const struct git_hash_algo *compat = the_repository->compat_hash_algo;
 159         struct strbuf sig = STRBUF_INIT, compat_sig = STRBUF_INIT;
 160         struct strbuf compat_buf = STRBUF_INIT;
 161         const char *keyid = get_signing_key();
 162         int ret = -1;
 163
 164         if (sign_buffer(buffer, &sig, keyid))
 165                 return -1;
 166
 167         if (compat) {
 168                 const struct git_hash_algo *algo = the_repository->hash_algo;
 169
 170                 if (convert_object_file(&compat_buf, algo, compat,
 171                                         buffer->buf, buffer->len, OBJ_TAG, 1))
 172                         goto out;
 173                 if (sign_buffer(&compat_buf, &compat_sig, keyid))
 174                         goto out;
 175                 add_header_signature(&compat_buf, &sig, algo);
 176                 strbuf_addbuf(&compat_buf, &compat_sig);
 177                 hash_object_file(compat, compat_buf.buf, compat_buf.len,
 178                                  OBJ_TAG, compat_oid_buf);
 179                 *compat_oid = compat_oid_buf;
 180         }
 181
 182         if (compat_sig.len)
 183                 add_header_signature(buffer, &compat_sig, compat);
 184
 185         strbuf_addbuf(buffer, &sig);
 186         ret = 0;
 187 out:
 188         strbuf_release(&sig);
 189         strbuf_release(&compat_sig);
 190         strbuf_release(&compat_buf);
 191         return ret;
 192 }
 193
 194 static const char tag_template[] =
 195         N_("\nWrite a message for tag:\n  %s\n"
 196         "Lines starting with '%s' will be ignored.\n");
 197
 198 static const char tag_template_nocleanup[] =
 199         N_("\nWrite a message for tag:\n  %s\n"
 200         "Lines starting with '%s' will be kept; you may remove them"
 201         " yourself if you want to.\n");
 202
 203 static int git_tag_config(const char *var, const char *value,
 204                           const struct config_context *ctx, void *cb)
 205 {
 206         if (!strcmp(var, "tag.gpgsign")) {
 207                 config_sign_tag = git_config_bool(var, value);
 208                 return 0;
 209         }
 210
 211         if (!strcmp(var, "tag.sort")) {
 212                 if (!value)
 213                         return config_error_nonbool(var);
 214                 string_list_append(cb, value);
 215                 return 0;
 216         }
 217
 218         if (!strcmp(var, "tag.forcesignannotated")) {
 219                 force_sign_annotate = git_config_bool(var, value);
 220                 return 0;
 221         }
 222
 223         if (starts_with(var, "column."))
 224                 return git_column_config(var, value, "tag", &colopts);
 225
 226         if (git_color_config(var, value, cb) < 0)
 227                 return -1;
 228
 229         return git_default_config(var, value, ctx, cb);
 230 }
 231
 232 static void write_tag_body(int fd, const struct object_id *oid)
 233 {
 234         unsigned long size;
 235         enum object_type type;
 236         char *buf, *sp, *orig;
 237         struct strbuf payload = STRBUF_INIT;
 238         struct strbuf signature = STRBUF_INIT;
 239
 240         orig = buf = repo_read_object_file(the_repository, oid, &type, &size);
 241         if (!buf)
 242                 return;
 243         if (parse_signature(buf, size, &payload, &signature)) {
 244                 buf = payload.buf;
 245                 size = payload.len;
 246         }
 247         /* skip header */
 248         sp = strstr(buf, "\n\n");
 249
 250         if (!sp || !size || type != OBJ_TAG) {
 251                 free(buf);
 252                 return;
 253         }
 254         sp += 2; /* skip the 2 LFs */
 255         write_or_die(fd, sp, buf + size - sp);
 256
 257         free(orig);
 258         strbuf_release(&payload);
 259         strbuf_release(&signature);
 260 }
 261
 262 static int build_tag_object(struct strbuf *buf, int sign, struct object_id *result)
 263 {
 264         struct object_id *compat_oid = NULL, compat_oid_buf;
 265         if (sign && do_sign(buf, &compat_oid, &compat_oid_buf) < 0)
 266                 return error(_("unable to sign the tag"));
 267         if (write_object_file_flags(buf->buf, buf->len, OBJ_TAG, result,
 268                                     compat_oid, 0) < 0)
 269                 return error(_("unable to write tag file"));
 270         return 0;
 271 }
 272
 273 struct create_tag_options {
 274         unsigned int message_given:1;
 275         unsigned int use_editor:1;
 276         unsigned int sign;
 277         enum {
 278                 CLEANUP_NONE,
 279                 CLEANUP_SPACE,
 280                 CLEANUP_ALL
 281         } cleanup_mode;
 282 };
 283
 284 static const char message_advice_nested_tag[] =
 285         N_("You have created a nested tag. The object referred to by your new tag is\n"
 286            "already a tag. If you meant to tag the object that it points to, use:\n"
 287            "\n"
 288            "\tgit tag -f %s %s^{}");
 289
 290 static void create_tag(const struct object_id *object, const char *object_ref,
 291                        const char *tag,
 292                        struct strbuf *buf, struct create_tag_options *opt,
 293                        struct object_id *prev, struct object_id *result, char *path)
 294 {
 295         enum object_type type;
 296         struct strbuf header = STRBUF_INIT;
 297
 298         type = oid_object_info(the_repository, object, NULL);
 299         if (type <= OBJ_NONE)
 300                 die(_("bad object type."));
 301
 302         if (type == OBJ_TAG)
 303                 advise_if_enabled(ADVICE_NESTED_TAG, _(message_advice_nested_tag),
 304                                   tag, object_ref);
 305
 306         strbuf_addf(&header,
 307                     "object %s\n"
 308                     "type %s\n"
 309                     "tag %s\n"
 310                     "tagger %s\n\n",
 311                     oid_to_hex(object),
 312                     type_name(type),
 313                     tag,
 314                     git_committer_info(IDENT_STRICT));
 315
 316         if (!opt->message_given || opt->use_editor) {
 317                 int fd;
 318
 319                 /* write the template message before editing: */
 320                 fd = xopen(path, O_CREAT | O_TRUNC | O_WRONLY, 0600);
 321
 322                 if (opt->message_given) {
 323                         write_or_die(fd, buf->buf, buf->len);
 324                         strbuf_reset(buf);
 325                 } else if (!is_null_oid(prev)) {
 326                         write_tag_body(fd, prev);
 327                 } else {
 328                         struct strbuf buf = STRBUF_INIT;
 329                         strbuf_addch(&buf, '\n');
 330                         if (opt->cleanup_mode == CLEANUP_ALL)
 331                                 strbuf_commented_addf(&buf, comment_line_str,
 332                                       _(tag_template), tag, comment_line_str);
 333                         else
 334                                 strbuf_commented_addf(&buf, comment_line_str,
 335                                       _(tag_template_nocleanup), tag, comment_line_str);
 336                         write_or_die(fd, buf.buf, buf.len);
 337                         strbuf_release(&buf);
 338                 }
 339                 close(fd);
 340
 341                 if (launch_editor(path, buf, NULL)) {
 342                         fprintf(stderr,
 343                         _("Please supply the message using either -m or -F option.\n"));
 344                         exit(1);
 345                 }
 346         }
 347
 348         if (opt->cleanup_mode != CLEANUP_NONE)
 349                 strbuf_stripspace(buf,
 350                   opt->cleanup_mode == CLEANUP_ALL ? comment_line_str : NULL);
 351
 352         if (!opt->message_given && !buf->len)
 353                 die(_("no tag message?"));
 354
 355         strbuf_insert(buf, 0, header.buf, header.len);
 356         strbuf_release(&header);
 357
 358         if (build_tag_object(buf, opt->sign, result) < 0) {
 359                 if (path)
 360                         fprintf(stderr, _("The tag message has been left in %s\n"),
 361                                 path);
 362                 exit(128);
 363         }
 364 }
 365
 366 static void create_reflog_msg(const struct object_id *oid, struct strbuf *sb)
 367 {
 368         enum object_type type;
 369         struct commit *c;
 370         char *buf;
 371         unsigned long size;
 372         int subject_len = 0;
 373         const char *subject_start;
 374
 375         char *rla = getenv("GIT_REFLOG_ACTION");
 376         if (rla) {
 377                 strbuf_addstr(sb, rla);
 378         } else {
 379                 strbuf_addstr(sb, "tag: tagging ");
 380                 strbuf_add_unique_abbrev(sb, oid, DEFAULT_ABBREV);
 381         }
 382
 383         strbuf_addstr(sb, " (");
 384         type = oid_object_info(the_repository, oid, NULL);
 385         switch (type) {
 386         default:
 387                 strbuf_addstr(sb, "object of unknown type");
 388                 break;
 389         case OBJ_COMMIT:
 390                 if ((buf = repo_read_object_file(the_repository, oid, &type, &size))) {
 391                         subject_len = find_commit_subject(buf, &subject_start);
 392                         strbuf_insert(sb, sb->len, subject_start, subject_len);
 393                 } else {
 394                         strbuf_addstr(sb, "commit object");
 395                 }
 396                 free(buf);
 397
 398                 if ((c = lookup_commit_reference(the_repository, oid)))
 399                         strbuf_addf(sb, ", %s", show_date(c->date, 0, DATE_MODE(SHORT)));
 400                 break;
 401         case OBJ_TREE:
 402                 strbuf_addstr(sb, "tree object");
 403                 break;
 404         case OBJ_BLOB:
 405                 strbuf_addstr(sb, "blob object");
 406                 break;
 407         case OBJ_TAG:
 408                 strbuf_addstr(sb, "other tag object");
 409                 break;
 410         }
 411         strbuf_addch(sb, ')');
 412 }
 413
 414 struct msg_arg {
 415         int given;
 416         struct strbuf buf;
 417 };
 418
 419 static int parse_msg_arg(const struct option *opt, const char *arg, int unset)
 420 {
 421         struct msg_arg *msg = opt->value;
 422
 423         BUG_ON_OPT_NEG(unset);
 424
 425         if (!arg)
 426                 return -1;
 427         if (msg->buf.len)
 428                 strbuf_addstr(&(msg->buf), "\n\n");
 429         strbuf_addstr(&(msg->buf), arg);
 430         msg->given = 1;
 431         return 0;
 432 }
 433
 434 static int strbuf_check_tag_ref(struct strbuf *sb, const char *name)
 435 {
 436         if (name[0] == '-')
 437                 return -1;
 438
 439         strbuf_reset(sb);
 440         strbuf_addf(sb, "refs/tags/%s", name);
 441
 442         return check_refname_format(sb->buf, 0);
 443 }
 444
 445 int cmd_tag(int argc, const char **argv, const char *prefix)
 446 {
 447         struct strbuf buf = STRBUF_INIT;
 448         struct strbuf ref = STRBUF_INIT;
 449         struct strbuf reflog_msg = STRBUF_INIT;
 450         struct object_id object, prev;
 451         const char *object_ref, *tag;
 452         struct create_tag_options opt;
 453         char *cleanup_arg = NULL;
 454         int create_reflog = 0;
 455         int annotate = 0, force = 0;
 456         int cmdmode = 0, create_tag_object = 0;
 457         char *msgfile = NULL;
 458         const char *keyid = NULL;
 459         struct msg_arg msg = { .buf = STRBUF_INIT };
 460         struct ref_transaction *transaction;
 461         struct strbuf err = STRBUF_INIT;
 462         struct ref_filter filter = REF_FILTER_INIT;
 463         struct ref_sorting *sorting;
 464         struct string_list sorting_options = STRING_LIST_INIT_DUP;
 465         struct ref_format format = REF_FORMAT_INIT;
 466         int icase = 0;
 467         int edit_flag = 0;
 468         struct option options[] = {
 469                 OPT_CMDMODE('l', "list", &cmdmode, N_("list tag names"), 'l'),
 470                 { OPTION_INTEGER, 'n', NULL, &filter.lines, N_("n"),
 471                                 N_("print <n> lines of each tag message"),
 472                                 PARSE_OPT_OPTARG, NULL, 1 },
 473                 OPT_CMDMODE('d', "delete", &cmdmode, N_("delete tags"), 'd'),
 474                 OPT_CMDMODE('v', "verify", &cmdmode, N_("verify tags"), 'v'),
 475
 476                 OPT_GROUP(N_("Tag creation options")),
 477                 OPT_BOOL('a', "annotate", &annotate,
 478                                         N_("annotated tag, needs a message")),
 479                 OPT_CALLBACK_F('m', "message", &msg, N_("message"),
 480                                N_("tag message"), PARSE_OPT_NONEG, parse_msg_arg),
 481                 OPT_FILENAME('F', "file", &msgfile, N_("read message from file")),
 482                 OPT_BOOL('e', "edit", &edit_flag, N_("force edit of tag message")),
 483                 OPT_BOOL('s', "sign", &opt.sign, N_("annotated and GPG-signed tag")),
 484                 OPT_CLEANUP(&cleanup_arg),
 485                 OPT_STRING('u', "local-user", &keyid, N_("key-id"),
 486                                         N_("use another key to sign the tag")),
 487                 OPT__FORCE(&force, N_("replace the tag if exists"), 0),
 488                 OPT_BOOL(0, "create-reflog", &create_reflog, N_("create a reflog")),
 489
 490                 OPT_GROUP(N_("Tag listing options")),
 491                 OPT_COLUMN(0, "column", &colopts, N_("show tag list in columns")),
 492                 OPT_CONTAINS(&filter.with_commit, N_("print only tags that contain the commit")),
 493                 OPT_NO_CONTAINS(&filter.no_commit, N_("print only tags that don't contain the commit")),
 494                 OPT_WITH(&filter.with_commit, N_("print only tags that contain the commit")),
 495                 OPT_WITHOUT(&filter.no_commit, N_("print only tags that don't contain the commit")),
 496                 OPT_MERGED(&filter, N_("print only tags that are merged")),
 497                 OPT_NO_MERGED(&filter, N_("print only tags that are not merged")),
 498                 OPT_BOOL(0, "omit-empty",  &format.array_opts.omit_empty,
 499                         N_("do not output a newline after empty formatted refs")),
 500                 OPT_REF_SORT(&sorting_options),
 501                 {
 502                         OPTION_CALLBACK, 0, "points-at", &filter.points_at, N_("object"),
 503                         N_("print only tags of the object"), PARSE_OPT_LASTARG_DEFAULT,
 504                         parse_opt_object_name, (intptr_t) "HEAD"
 505                 },
 506                 OPT_STRING(  0 , "format", &format.format, N_("format"),
 507                            N_("format to use for the output")),
 508                 OPT__COLOR(&format.use_color, N_("respect format colors")),
 509                 OPT_BOOL('i', "ignore-case", &icase, N_("sorting and filtering are case insensitive")),
 510                 OPT_END()
 511         };
 512         int ret = 0;
 513         const char *only_in_list = NULL;
 514         char *path = NULL;
 515
 516         setup_ref_filter_porcelain_msg();
 517
 518         /*
 519          * Try to set sort keys from config. If config does not set any,
 520          * fall back on default (refname) sorting.
 521          */
 522         git_config(git_tag_config, &sorting_options);
 523         if (!sorting_options.nr)
 524                 string_list_append(&sorting_options, "refname");
 525
 526         memset(&opt, 0, sizeof(opt));
 527         filter.lines = -1;
 528         opt.sign = -1;
 529
 530         argc = parse_options(argc, argv, prefix, options, git_tag_usage, 0);
 531
 532         if (!cmdmode) {
 533                 if (argc == 0)
 534                         cmdmode = 'l';
 535                 else if (filter.with_commit || filter.no_commit ||
 536                          filter.reachable_from || filter.unreachable_from ||
 537                          filter.points_at.nr || filter.lines != -1)
 538                         cmdmode = 'l';
 539         }
 540
 541         if (cmdmode == 'l')
 542                 setup_auto_pager("tag", 1);
 543
 544         if (opt.sign == -1)
 545                 opt.sign = cmdmode ? 0 : config_sign_tag > 0;
 546
 547         if (keyid) {
 548                 opt.sign = 1;
 549                 set_signing_key(keyid);
 550         }
 551         create_tag_object = (opt.sign || annotate || msg.given || msgfile);
 552
 553         if ((create_tag_object || force) && (cmdmode != 0))
 554                 usage_with_options(git_tag_usage, options);
 555
 556         finalize_colopts(&colopts, -1);
 557         if (cmdmode == 'l' && filter.lines != -1) {
 558                 if (explicitly_enable_column(colopts))
 559                         die(_("options '%s' and '%s' cannot be used together"), "--column", "-n");
 560                 colopts = 0;
 561         }
 562         sorting = ref_sorting_options(&sorting_options);
 563         ref_sorting_set_sort_flags_all(sorting, REF_SORTING_ICASE, icase);
 564         filter.ignore_case = icase;
 565         if (cmdmode == 'l') {
 566                 if (column_active(colopts)) {
 567                         struct column_options copts;
 568                         memset(&copts, 0, sizeof(copts));
 569                         copts.padding = 2;
 570                         if (run_column_filter(colopts, &copts))
 571                                 die(_("could not start 'git column'"));
 572                 }
 573                 filter.name_patterns = argv;
 574                 ret = list_tags(&filter, sorting, &format);
 575                 if (column_active(colopts))
 576                         stop_column_filter();
 577                 goto cleanup;
 578         }
 579         if (filter.lines != -1)
 580                 only_in_list = "-n";
 581         else if (filter.with_commit)
 582                 only_in_list = "--contains";
 583         else if (filter.no_commit)
 584                 only_in_list = "--no-contains";
 585         else if (filter.points_at.nr)
 586                 only_in_list = "--points-at";
 587         else if (filter.reachable_from)
 588                 only_in_list = "--merged";
 589         else if (filter.unreachable_from)
 590                 only_in_list = "--no-merged";
 591         if (only_in_list)
 592                 die(_("the '%s' option is only allowed in list mode"), only_in_list);
 593         if (cmdmode == 'd') {
 594                 ret = delete_tags(argv);
 595                 goto cleanup;
 596         }
 597         if (cmdmode == 'v') {
 598                 if (format.format && verify_ref_format(&format))
 599                         usage_with_options(git_tag_usage, options);
 600                 ret = for_each_tag_name(argv, verify_tag, &format);
 601                 goto cleanup;
 602         }
 603
 604         if (msg.given || msgfile) {
 605                 if (msg.given && msgfile)
 606                         die(_("options '%s' and '%s' cannot be used together"), "-F", "-m");
 607                 if (msg.given)
 608                         strbuf_addbuf(&buf, &(msg.buf));
 609                 else {
 610                         if (!strcmp(msgfile, "-")) {
 611                                 if (strbuf_read(&buf, 0, 1024) < 0)
 612                                         die_errno(_("cannot read '%s'"), msgfile);
 613                         } else {
 614                                 if (strbuf_read_file(&buf, msgfile, 1024) < 0)
 615                                         die_errno(_("could not open or read '%s'"),
 616                                                 msgfile);
 617                         }
 618                 }
 619         }
 620
 621         tag = argv[0];
 622
 623         object_ref = argc == 2 ? argv[1] : "HEAD";
 624         if (argc > 2)
 625                 die(_("too many arguments"));
 626
 627         if (repo_get_oid(the_repository, object_ref, &object))
 628                 die(_("Failed to resolve '%s' as a valid ref."), object_ref);
 629
 630         if (strbuf_check_tag_ref(&ref, tag))
 631                 die(_("'%s' is not a valid tag name."), tag);
 632
 633         if (read_ref(ref.buf, &prev))
 634                 oidclr(&prev);
 635         else if (!force)
 636                 die(_("tag '%s' already exists"), tag);
 637
 638         opt.message_given = msg.given || msgfile;
 639         opt.use_editor = edit_flag;
 640
 641         if (!cleanup_arg || !strcmp(cleanup_arg, "strip"))
 642                 opt.cleanup_mode = CLEANUP_ALL;
 643         else if (!strcmp(cleanup_arg, "verbatim"))
 644                 opt.cleanup_mode = CLEANUP_NONE;
 645         else if (!strcmp(cleanup_arg, "whitespace"))
 646                 opt.cleanup_mode = CLEANUP_SPACE;
 647         else
 648                 die(_("Invalid cleanup mode %s"), cleanup_arg);
 649
 650         create_reflog_msg(&object, &reflog_msg);
 651
 652         if (create_tag_object) {
 653                 if (force_sign_annotate && !annotate)
 654                         opt.sign = 1;
 655                 path = git_pathdup("TAG_EDITMSG");
 656                 create_tag(&object, object_ref, tag, &buf, &opt, &prev, &object,
 657                            path);
 658         }
 659
 660         transaction = ref_transaction_begin(&err);
 661         if (!transaction ||
 662             ref_transaction_update(transaction, ref.buf, &object, &prev,
 663                                    create_reflog ? REF_FORCE_CREATE_REFLOG : 0,
 664                                    reflog_msg.buf, &err) ||
 665             ref_transaction_commit(transaction, &err)) {
 666                 if (path)
 667                         fprintf(stderr,
 668                                 _("The tag message has been left in %s\n"),
 669                                 path);
 670                 die("%s", err.buf);
 671         }
 672         if (path) {
 673                 unlink_or_warn(path);
 674                 free(path);
 675         }
 676         ref_transaction_free(transaction);
 677         if (force && !is_null_oid(&prev) && !oideq(&prev, &object))
 678                 printf(_("Updated tag '%s' (was %s)\n"), tag,
 679                        repo_find_unique_abbrev(the_repository, &prev, DEFAULT_ABBREV));
 680
 681 cleanup:
 682         ref_sorting_release(sorting);
 683         ref_filter_clear(&filter);
 684         strbuf_release(&buf);
 685         strbuf_release(&ref);
 686         strbuf_release(&reflog_msg);
 687         strbuf_release(&msg.buf);
 688         strbuf_release(&err);
 689         free(msgfile);
 690         return ret;
 691 }