git.oblomov.eu Git - git/blob - 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 "builtin.h"
  11 #include "refs.h"
  12 #include "tag.h"
  13 #include "run-command.h"
  14 #include "parse-options.h"
  15 #include "diff.h"
  16 #include "revision.h"
  17 #include "gpg-interface.h"
  18 #include "sha1-array.h"
  19 #include "column.h"
  20
  21 static const char * const git_tag_usage[] = {
  22         N_("git tag [-a | -s | -u <key-id>] [-f] [-m <msg> | -F <file>] <tagname> [<head>]"),
  23         N_("git tag -d <tagname>..."),
  24         N_("git tag -l [-n[<num>]] [--contains <commit>] [--points-at <object>]"
  25                 "\n\t\t[<pattern>...]"),
  26         N_("git tag -v <tagname>..."),
  27         NULL
  28 };
  29
  30 #define STRCMP_SORT     0       /* must be zero */
  31 #define VERCMP_SORT     1
  32 #define SORT_MASK       0x7fff
  33 #define REVERSE_SORT    0x8000
  34
  35 static int tag_sort;
  36
  37 struct tag_filter {
  38         const char **patterns;
  39         int lines;
  40         int sort;
  41         struct string_list tags;
  42         struct commit_list *with_commit;
  43 };
  44
  45 static struct sha1_array points_at;
  46 static unsigned int colopts;
  47
  48 static int match_pattern(const char **patterns, const char *ref)
  49 {
  50         /* no pattern means match everything */
  51         if (!*patterns)
  52                 return 1;
  53         for (; *patterns; patterns++)
  54                 if (!wildmatch(*patterns, ref, 0, NULL))
  55                         return 1;
  56         return 0;
  57 }
  58
  59 static const unsigned char *match_points_at(const char *refname,
  60                                             const unsigned char *sha1)
  61 {
  62         const unsigned char *tagged_sha1 = NULL;
  63         struct object *obj;
  64
  65         if (sha1_array_lookup(&points_at, sha1) >= 0)
  66                 return sha1;
  67         obj = parse_object(sha1);
  68         if (!obj)
  69                 die(_("malformed object at '%s'"), refname);
  70         if (obj->type == OBJ_TAG)
  71                 tagged_sha1 = ((struct tag *)obj)->tagged->sha1;
  72         if (tagged_sha1 && sha1_array_lookup(&points_at, tagged_sha1) >= 0)
  73                 return tagged_sha1;
  74         return NULL;
  75 }
  76
  77 static int in_commit_list(const struct commit_list *want, struct commit *c)
  78 {
  79         for (; want; want = want->next)
  80                 if (!hashcmp(want->item->object.sha1, c->object.sha1))
  81                         return 1;
  82         return 0;
  83 }
  84
  85 enum contains_result {
  86         CONTAINS_UNKNOWN = -1,
  87         CONTAINS_NO = 0,
  88         CONTAINS_YES = 1
  89 };
  90
  91 /*
  92  * Test whether the candidate or one of its parents is contained in the list.
  93  * Do not recurse to find out, though, but return -1 if inconclusive.
  94  */
  95 static enum contains_result contains_test(struct commit *candidate,
  96                             const struct commit_list *want)
  97 {
  98         /* was it previously marked as containing a want commit? */
  99         if (candidate->object.flags & TMP_MARK)
 100                 return 1;
 101         /* or marked as not possibly containing a want commit? */
 102         if (candidate->object.flags & UNINTERESTING)
 103                 return 0;
 104         /* or are we it? */
 105         if (in_commit_list(want, candidate)) {
 106                 candidate->object.flags |= TMP_MARK;
 107                 return 1;
 108         }
 109
 110         if (parse_commit(candidate) < 0)
 111                 return 0;
 112
 113         return -1;
 114 }
 115
 116 /*
 117  * Mimicking the real stack, this stack lives on the heap, avoiding stack
 118  * overflows.
 119  *
 120  * At each recursion step, the stack items points to the commits whose
 121  * ancestors are to be inspected.
 122  */
 123 struct stack {
 124         int nr, alloc;
 125         struct stack_entry {
 126                 struct commit *commit;
 127                 struct commit_list *parents;
 128         } *stack;
 129 };
 130
 131 static void push_to_stack(struct commit *candidate, struct stack *stack)
 132 {
 133         int index = stack->nr++;
 134         ALLOC_GROW(stack->stack, stack->nr, stack->alloc);
 135         stack->stack[index].commit = candidate;
 136         stack->stack[index].parents = candidate->parents;
 137 }
 138
 139 static enum contains_result contains(struct commit *candidate,
 140                 const struct commit_list *want)
 141 {
 142         struct stack stack = { 0, 0, NULL };
 143         int result = contains_test(candidate, want);
 144
 145         if (result != CONTAINS_UNKNOWN)
 146                 return result;
 147
 148         push_to_stack(candidate, &stack);
 149         while (stack.nr) {
 150                 struct stack_entry *entry = &stack.stack[stack.nr - 1];
 151                 struct commit *commit = entry->commit;
 152                 struct commit_list *parents = entry->parents;
 153
 154                 if (!parents) {
 155                         commit->object.flags |= UNINTERESTING;
 156                         stack.nr--;
 157                 }
 158                 /*
 159                  * If we just popped the stack, parents->item has been marked,
 160                  * therefore contains_test will return a meaningful 0 or 1.
 161                  */
 162                 else switch (contains_test(parents->item, want)) {
 163                 case CONTAINS_YES:
 164                         commit->object.flags |= TMP_MARK;
 165                         stack.nr--;
 166                         break;
 167                 case CONTAINS_NO:
 168                         entry->parents = parents->next;
 169                         break;
 170                 case CONTAINS_UNKNOWN:
 171                         push_to_stack(parents->item, &stack);
 172                         break;
 173                 }
 174         }
 175         free(stack.stack);
 176         return contains_test(candidate, want);
 177 }
 178
 179 static void show_tag_lines(const unsigned char *sha1, int lines)
 180 {
 181         int i;
 182         unsigned long size;
 183         enum object_type type;
 184         char *buf, *sp, *eol;
 185         size_t len;
 186
 187         buf = read_sha1_file(sha1, &type, &size);
 188         if (!buf)
 189                 die_errno("unable to read object %s", sha1_to_hex(sha1));
 190         if (type != OBJ_COMMIT && type != OBJ_TAG)
 191                 goto free_return;
 192         if (!size)
 193                 die("an empty %s object %s?",
 194                     typename(type), sha1_to_hex(sha1));
 195
 196         /* skip header */
 197         sp = strstr(buf, "\n\n");
 198         if (!sp)
 199                 goto free_return;
 200
 201         /* only take up to "lines" lines, and strip the signature from a tag */
 202         if (type == OBJ_TAG)
 203                 size = parse_signature(buf, size);
 204         for (i = 0, sp += 2; i < lines && sp < buf + size; i++) {
 205                 if (i)
 206                         printf("\n    ");
 207                 eol = memchr(sp, '\n', size - (sp - buf));
 208                 len = eol ? eol - sp : size - (sp - buf);
 209                 fwrite(sp, len, 1, stdout);
 210                 if (!eol)
 211                         break;
 212                 sp = eol + 1;
 213         }
 214 free_return:
 215         free(buf);
 216 }
 217
 218 static int show_reference(const char *refname, const unsigned char *sha1,
 219                           int flag, void *cb_data)
 220 {
 221         struct tag_filter *filter = cb_data;
 222
 223         if (match_pattern(filter->patterns, refname)) {
 224                 if (filter->with_commit) {
 225                         struct commit *commit;
 226
 227                         commit = lookup_commit_reference_gently(sha1, 1);
 228                         if (!commit)
 229                                 return 0;
 230                         if (!contains(commit, filter->with_commit))
 231                                 return 0;
 232                 }
 233
 234                 if (points_at.nr && !match_points_at(refname, sha1))
 235                         return 0;
 236
 237                 if (!filter->lines) {
 238                         if (filter->sort)
 239                                 string_list_append(&filter->tags, refname);
 240                         else
 241                                 printf("%s\n", refname);
 242                         return 0;
 243                 }
 244                 printf("%-15s ", refname);
 245                 show_tag_lines(sha1, filter->lines);
 246                 putchar('\n');
 247         }
 248
 249         return 0;
 250 }
 251
 252 static int sort_by_version(const void *a_, const void *b_)
 253 {
 254         const struct string_list_item *a = a_;
 255         const struct string_list_item *b = b_;
 256         return versioncmp(a->string, b->string);
 257 }
 258
 259 static int list_tags(const char **patterns, int lines,
 260                      struct commit_list *with_commit, int sort)
 261 {
 262         struct tag_filter filter;
 263         struct each_ref_fn_sha1_adapter wrapped_show_reference =
 264                 {show_reference, (void *)&filter};
 265
 266         filter.patterns = patterns;
 267         filter.lines = lines;
 268         filter.sort = sort;
 269         filter.with_commit = with_commit;
 270         memset(&filter.tags, 0, sizeof(filter.tags));
 271         filter.tags.strdup_strings = 1;
 272
 273         for_each_tag_ref(each_ref_fn_adapter, &wrapped_show_reference);
 274         if (sort) {
 275                 int i;
 276                 if ((sort & SORT_MASK) == VERCMP_SORT)
 277                         qsort(filter.tags.items, filter.tags.nr,
 278                               sizeof(struct string_list_item), sort_by_version);
 279                 if (sort & REVERSE_SORT)
 280                         for (i = filter.tags.nr - 1; i >= 0; i--)
 281                                 printf("%s\n", filter.tags.items[i].string);
 282                 else
 283                         for (i = 0; i < filter.tags.nr; i++)
 284                                 printf("%s\n", filter.tags.items[i].string);
 285                 string_list_clear(&filter.tags, 0);
 286         }
 287         return 0;
 288 }
 289
 290 typedef int (*each_tag_name_fn)(const char *name, const char *ref,
 291                                 const unsigned char *sha1);
 292
 293 static int for_each_tag_name(const char **argv, each_tag_name_fn fn)
 294 {
 295         const char **p;
 296         char ref[PATH_MAX];
 297         int had_error = 0;
 298         unsigned char sha1[20];
 299
 300         for (p = argv; *p; p++) {
 301                 if (snprintf(ref, sizeof(ref), "refs/tags/%s", *p)
 302                                         >= sizeof(ref)) {
 303                         error(_("tag name too long: %.*s..."), 50, *p);
 304                         had_error = 1;
 305                         continue;
 306                 }
 307                 if (read_ref(ref, sha1)) {
 308                         error(_("tag '%s' not found."), *p);
 309                         had_error = 1;
 310                         continue;
 311                 }
 312                 if (fn(*p, ref, sha1))
 313                         had_error = 1;
 314         }
 315         return had_error;
 316 }
 317
 318 static int delete_tag(const char *name, const char *ref,
 319                                 const unsigned char *sha1)
 320 {
 321         if (delete_ref(ref, sha1, 0))
 322                 return 1;
 323         printf(_("Deleted tag '%s' (was %s)\n"), name, find_unique_abbrev(sha1, DEFAULT_ABBREV));
 324         return 0;
 325 }
 326
 327 static int verify_tag(const char *name, const char *ref,
 328                                 const unsigned char *sha1)
 329 {
 330         const char *argv_verify_tag[] = {"verify-tag",
 331                                         "-v", "SHA1_HEX", NULL};
 332         argv_verify_tag[2] = sha1_to_hex(sha1);
 333
 334         if (run_command_v_opt(argv_verify_tag, RUN_GIT_CMD))
 335                 return error(_("could not verify the tag '%s'"), name);
 336         return 0;
 337 }
 338
 339 static int do_sign(struct strbuf *buffer)
 340 {
 341         return sign_buffer(buffer, buffer, get_signing_key());
 342 }
 343
 344 static const char tag_template[] =
 345         N_("\nWrite a message for tag:\n  %s\n"
 346         "Lines starting with '%c' will be ignored.\n");
 347
 348 static const char tag_template_nocleanup[] =
 349         N_("\nWrite a message for tag:\n  %s\n"
 350         "Lines starting with '%c' will be kept; you may remove them"
 351         " yourself if you want to.\n");
 352
 353 /*
 354  * Parse a sort string, and return 0 if parsed successfully. Will return
 355  * non-zero when the sort string does not parse into a known type. If var is
 356  * given, the error message becomes a warning and includes information about
 357  * the configuration value.
 358  */
 359 static int parse_sort_string(const char *var, const char *arg, int *sort)
 360 {
 361         int type = 0, flags = 0;
 362
 363         if (skip_prefix(arg, "-", &arg))
 364                 flags |= REVERSE_SORT;
 365
 366         if (skip_prefix(arg, "version:", &arg) || skip_prefix(arg, "v:", &arg))
 367                 type = VERCMP_SORT;
 368         else
 369                 type = STRCMP_SORT;
 370
 371         if (strcmp(arg, "refname")) {
 372                 if (!var)
 373                         return error(_("unsupported sort specification '%s'"), arg);
 374                 else {
 375                         warning(_("unsupported sort specification '%s' in variable '%s'"),
 376                                 var, arg);
 377                         return -1;
 378                 }
 379         }
 380
 381         *sort = (type | flags);
 382
 383         return 0;
 384 }
 385
 386 static int git_tag_config(const char *var, const char *value, void *cb)
 387 {
 388         int status;
 389
 390         if (!strcmp(var, "tag.sort")) {
 391                 if (!value)
 392                         return config_error_nonbool(var);
 393                 parse_sort_string(var, value, &tag_sort);
 394                 return 0;
 395         }
 396
 397         status = git_gpg_config(var, value, cb);
 398         if (status)
 399                 return status;
 400         if (starts_with(var, "column."))
 401                 return git_column_config(var, value, "tag", &colopts);
 402         return git_default_config(var, value, cb);
 403 }
 404
 405 static void write_tag_body(int fd, const unsigned char *sha1)
 406 {
 407         unsigned long size;
 408         enum object_type type;
 409         char *buf, *sp;
 410
 411         buf = read_sha1_file(sha1, &type, &size);
 412         if (!buf)
 413                 return;
 414         /* skip header */
 415         sp = strstr(buf, "\n\n");
 416
 417         if (!sp || !size || type != OBJ_TAG) {
 418                 free(buf);
 419                 return;
 420         }
 421         sp += 2; /* skip the 2 LFs */
 422         write_or_die(fd, sp, parse_signature(sp, buf + size - sp));
 423
 424         free(buf);
 425 }
 426
 427 static int build_tag_object(struct strbuf *buf, int sign, unsigned char *result)
 428 {
 429         if (sign && do_sign(buf) < 0)
 430                 return error(_("unable to sign the tag"));
 431         if (write_sha1_file(buf->buf, buf->len, tag_type, result) < 0)
 432                 return error(_("unable to write tag file"));
 433         return 0;
 434 }
 435
 436 struct create_tag_options {
 437         unsigned int message_given:1;
 438         unsigned int sign;
 439         enum {
 440                 CLEANUP_NONE,
 441                 CLEANUP_SPACE,
 442                 CLEANUP_ALL
 443         } cleanup_mode;
 444 };
 445
 446 static void create_tag(const unsigned char *object, const char *tag,
 447                        struct strbuf *buf, struct create_tag_options *opt,
 448                        unsigned char *prev, unsigned char *result)
 449 {
 450         enum object_type type;
 451         char header_buf[1024];
 452         int header_len;
 453         char *path = NULL;
 454
 455         type = sha1_object_info(object, NULL);
 456         if (type <= OBJ_NONE)
 457             die(_("bad object type."));
 458
 459         header_len = snprintf(header_buf, sizeof(header_buf),
 460                           "object %s\n"
 461                           "type %s\n"
 462                           "tag %s\n"
 463                           "tagger %s\n\n",
 464                           sha1_to_hex(object),
 465                           typename(type),
 466                           tag,
 467                           git_committer_info(IDENT_STRICT));
 468
 469         if (header_len > sizeof(header_buf) - 1)
 470                 die(_("tag header too big."));
 471
 472         if (!opt->message_given) {
 473                 int fd;
 474
 475                 /* write the template message before editing: */
 476                 path = git_pathdup("TAG_EDITMSG");
 477                 fd = open(path, O_CREAT | O_TRUNC | O_WRONLY, 0600);
 478                 if (fd < 0)
 479                         die_errno(_("could not create file '%s'"), path);
 480
 481                 if (!is_null_sha1(prev)) {
 482                         write_tag_body(fd, prev);
 483                 } else {
 484                         struct strbuf buf = STRBUF_INIT;
 485                         strbuf_addch(&buf, '\n');
 486                         if (opt->cleanup_mode == CLEANUP_ALL)
 487                                 strbuf_commented_addf(&buf, _(tag_template), tag, comment_line_char);
 488                         else
 489                                 strbuf_commented_addf(&buf, _(tag_template_nocleanup), tag, comment_line_char);
 490                         write_or_die(fd, buf.buf, buf.len);
 491                         strbuf_release(&buf);
 492                 }
 493                 close(fd);
 494
 495                 if (launch_editor(path, buf, NULL)) {
 496                         fprintf(stderr,
 497                         _("Please supply the message using either -m or -F option.\n"));
 498                         exit(1);
 499                 }
 500         }
 501
 502         if (opt->cleanup_mode != CLEANUP_NONE)
 503                 stripspace(buf, opt->cleanup_mode == CLEANUP_ALL);
 504
 505         if (!opt->message_given && !buf->len)
 506                 die(_("no tag message?"));
 507
 508         strbuf_insert(buf, 0, header_buf, header_len);
 509
 510         if (build_tag_object(buf, opt->sign, result) < 0) {
 511                 if (path)
 512                         fprintf(stderr, _("The tag message has been left in %s\n"),
 513                                 path);
 514                 exit(128);
 515         }
 516         if (path) {
 517                 unlink_or_warn(path);
 518                 free(path);
 519         }
 520 }
 521
 522 struct msg_arg {
 523         int given;
 524         struct strbuf buf;
 525 };
 526
 527 static int parse_msg_arg(const struct option *opt, const char *arg, int unset)
 528 {
 529         struct msg_arg *msg = opt->value;
 530
 531         if (!arg)
 532                 return -1;
 533         if (msg->buf.len)
 534                 strbuf_addstr(&(msg->buf), "\n\n");
 535         strbuf_addstr(&(msg->buf), arg);
 536         msg->given = 1;
 537         return 0;
 538 }
 539
 540 static int strbuf_check_tag_ref(struct strbuf *sb, const char *name)
 541 {
 542         if (name[0] == '-')
 543                 return -1;
 544
 545         strbuf_reset(sb);
 546         strbuf_addf(sb, "refs/tags/%s", name);
 547
 548         return check_refname_format(sb->buf, 0);
 549 }
 550
 551 static int parse_opt_points_at(const struct option *opt __attribute__((unused)),
 552                         const char *arg, int unset)
 553 {
 554         unsigned char sha1[20];
 555
 556         if (unset) {
 557                 sha1_array_clear(&points_at);
 558                 return 0;
 559         }
 560         if (!arg)
 561                 return error(_("switch 'points-at' requires an object"));
 562         if (get_sha1(arg, sha1))
 563                 return error(_("malformed object name '%s'"), arg);
 564         sha1_array_append(&points_at, sha1);
 565         return 0;
 566 }
 567
 568 static int parse_opt_sort(const struct option *opt, const char *arg, int unset)
 569 {
 570         int *sort = opt->value;
 571
 572         return parse_sort_string(NULL, arg, sort);
 573 }
 574
 575 int cmd_tag(int argc, const char **argv, const char *prefix)
 576 {
 577         struct strbuf buf = STRBUF_INIT;
 578         struct strbuf ref = STRBUF_INIT;
 579         unsigned char object[20], prev[20];
 580         const char *object_ref, *tag;
 581         struct create_tag_options opt;
 582         char *cleanup_arg = NULL;
 583         int annotate = 0, force = 0, lines = -1;
 584         int cmdmode = 0;
 585         const char *msgfile = NULL, *keyid = NULL;
 586         struct msg_arg msg = { 0, STRBUF_INIT };
 587         struct commit_list *with_commit = NULL;
 588         struct ref_transaction *transaction;
 589         struct strbuf err = STRBUF_INIT;
 590         struct option options[] = {
 591                 OPT_CMDMODE('l', "list", &cmdmode, N_("list tag names"), 'l'),
 592                 { OPTION_INTEGER, 'n', NULL, &lines, N_("n"),
 593                                 N_("print <n> lines of each tag message"),
 594                                 PARSE_OPT_OPTARG, NULL, 1 },
 595                 OPT_CMDMODE('d', "delete", &cmdmode, N_("delete tags"), 'd'),
 596                 OPT_CMDMODE('v', "verify", &cmdmode, N_("verify tags"), 'v'),
 597
 598                 OPT_GROUP(N_("Tag creation options")),
 599                 OPT_BOOL('a', "annotate", &annotate,
 600                                         N_("annotated tag, needs a message")),
 601                 OPT_CALLBACK('m', "message", &msg, N_("message"),
 602                              N_("tag message"), parse_msg_arg),
 603                 OPT_FILENAME('F', "file", &msgfile, N_("read message from file")),
 604                 OPT_BOOL('s', "sign", &opt.sign, N_("annotated and GPG-signed tag")),
 605                 OPT_STRING(0, "cleanup", &cleanup_arg, N_("mode"),
 606                         N_("how to strip spaces and #comments from message")),
 607                 OPT_STRING('u', "local-user", &keyid, N_("key-id"),
 608                                         N_("use another key to sign the tag")),
 609                 OPT__FORCE(&force, N_("replace the tag if exists")),
 610
 611                 OPT_GROUP(N_("Tag listing options")),
 612                 OPT_COLUMN(0, "column", &colopts, N_("show tag list in columns")),
 613                 {
 614                         OPTION_CALLBACK, 0, "sort", &tag_sort, N_("type"), N_("sort tags"),
 615                         PARSE_OPT_NONEG, parse_opt_sort
 616                 },
 617                 {
 618                         OPTION_CALLBACK, 0, "contains", &with_commit, N_("commit"),
 619                         N_("print only tags that contain the commit"),
 620                         PARSE_OPT_LASTARG_DEFAULT,
 621                         parse_opt_with_commit, (intptr_t)"HEAD",
 622                 },
 623                 {
 624                         OPTION_CALLBACK, 0, "with", &with_commit, N_("commit"),
 625                         N_("print only tags that contain the commit"),
 626                         PARSE_OPT_HIDDEN | PARSE_OPT_LASTARG_DEFAULT,
 627                         parse_opt_with_commit, (intptr_t)"HEAD",
 628                 },
 629                 {
 630                         OPTION_CALLBACK, 0, "points-at", NULL, N_("object"),
 631                         N_("print only tags of the object"), 0, parse_opt_points_at
 632                 },
 633                 OPT_END()
 634         };
 635
 636         git_config(git_tag_config, NULL);
 637
 638         memset(&opt, 0, sizeof(opt));
 639
 640         argc = parse_options(argc, argv, prefix, options, git_tag_usage, 0);
 641
 642         if (keyid) {
 643                 opt.sign = 1;
 644                 set_signing_key(keyid);
 645         }
 646         if (opt.sign)
 647                 annotate = 1;
 648         if (argc == 0 && !cmdmode)
 649                 cmdmode = 'l';
 650
 651         if ((annotate || msg.given || msgfile || force) && (cmdmode != 0))
 652                 usage_with_options(git_tag_usage, options);
 653
 654         finalize_colopts(&colopts, -1);
 655         if (cmdmode == 'l' && lines != -1) {
 656                 if (explicitly_enable_column(colopts))
 657                         die(_("--column and -n are incompatible"));
 658                 colopts = 0;
 659         }
 660         if (cmdmode == 'l') {
 661                 int ret;
 662                 if (column_active(colopts)) {
 663                         struct column_options copts;
 664                         memset(&copts, 0, sizeof(copts));
 665                         copts.padding = 2;
 666                         run_column_filter(colopts, &copts);
 667                 }
 668                 if (lines != -1 && tag_sort)
 669                         die(_("--sort and -n are incompatible"));
 670                 ret = list_tags(argv, lines == -1 ? 0 : lines, with_commit, tag_sort);
 671                 if (column_active(colopts))
 672                         stop_column_filter();
 673                 return ret;
 674         }
 675         if (lines != -1)
 676                 die(_("-n option is only allowed with -l."));
 677         if (with_commit)
 678                 die(_("--contains option is only allowed with -l."));
 679         if (points_at.nr)
 680                 die(_("--points-at option is only allowed with -l."));
 681         if (cmdmode == 'd')
 682                 return for_each_tag_name(argv, delete_tag);
 683         if (cmdmode == 'v')
 684                 return for_each_tag_name(argv, verify_tag);
 685
 686         if (msg.given || msgfile) {
 687                 if (msg.given && msgfile)
 688                         die(_("only one -F or -m option is allowed."));
 689                 annotate = 1;
 690                 if (msg.given)
 691                         strbuf_addbuf(&buf, &(msg.buf));
 692                 else {
 693                         if (!strcmp(msgfile, "-")) {
 694                                 if (strbuf_read(&buf, 0, 1024) < 0)
 695                                         die_errno(_("cannot read '%s'"), msgfile);
 696                         } else {
 697                                 if (strbuf_read_file(&buf, msgfile, 1024) < 0)
 698                                         die_errno(_("could not open or read '%s'"),
 699                                                 msgfile);
 700                         }
 701                 }
 702         }
 703
 704         tag = argv[0];
 705
 706         object_ref = argc == 2 ? argv[1] : "HEAD";
 707         if (argc > 2)
 708                 die(_("too many params"));
 709
 710         if (get_sha1(object_ref, object))
 711                 die(_("Failed to resolve '%s' as a valid ref."), object_ref);
 712
 713         if (strbuf_check_tag_ref(&ref, tag))
 714                 die(_("'%s' is not a valid tag name."), tag);
 715
 716         if (read_ref(ref.buf, prev))
 717                 hashclr(prev);
 718         else if (!force)
 719                 die(_("tag '%s' already exists"), tag);
 720
 721         opt.message_given = msg.given || msgfile;
 722
 723         if (!cleanup_arg || !strcmp(cleanup_arg, "strip"))
 724                 opt.cleanup_mode = CLEANUP_ALL;
 725         else if (!strcmp(cleanup_arg, "verbatim"))
 726                 opt.cleanup_mode = CLEANUP_NONE;
 727         else if (!strcmp(cleanup_arg, "whitespace"))
 728                 opt.cleanup_mode = CLEANUP_SPACE;
 729         else
 730                 die(_("Invalid cleanup mode %s"), cleanup_arg);
 731
 732         if (annotate)
 733                 create_tag(object, tag, &buf, &opt, prev, object);
 734
 735         transaction = ref_transaction_begin(&err);
 736         if (!transaction ||
 737             ref_transaction_update(transaction, ref.buf, object, prev,
 738                                    0, NULL, &err) ||
 739             ref_transaction_commit(transaction, &err))
 740                 die("%s", err.buf);
 741         ref_transaction_free(transaction);
 742         if (force && !is_null_sha1(prev) && hashcmp(prev, object))
 743                 printf(_("Updated tag '%s' (was %s)\n"), tag, find_unique_abbrev(prev, DEFAULT_ABBREV));
 744
 745         strbuf_release(&err);
 746         strbuf_release(&buf);
 747         strbuf_release(&ref);
 748         return 0;
 749 }