builtin/tag.c

   1 /*
   2  * Builtin "git tag"
   3  *
   4  * Copyright (c) 2007 Kristian Høgsberg <krh@redhat.com>,
   5  *                    Carlos Rica <jasampler@gmail.com>
   6  * Based on git-tag.sh and mktag.c by Linus Torvalds.
   7  */
   8
   9 #include "cache.h"
  10 #include "config.h"
  11 #include "builtin.h"
  12 #include "refs.h"
  13 #include "object-store.h"
  14 #include "tag.h"
  15 #include "run-command.h"
  16 #include "parse-options.h"
  17 #include "diff.h"
  18 #include "revision.h"
  19 #include "gpg-interface.h"
  20 #include "oid-array.h"
  21 #include "column.h"
  22 #include "ref-filter.h"
  23
  24 static const char * const git_tag_usage[] = {
  25         N_("git tag [-a | -s | -u <key-id>] [-f] [-m <msg> | -F <file>]\n"
  26                 "\t\t<tagname> [<head>]"),
  27         N_("git tag -d <tagname>..."),
  28         N_("git tag -l [-n[<num>]] [--contains <commit>] [--no-contains <commit>] [--points-at <object>]\n"
  29                 "\t\t[--format=<format>] [--merged <commit>] [--no-merged <commit>] [<pattern>...]"),
  30         N_("git tag -v [--format=<format>] <tagname>..."),
  31         NULL
  32 };
  33
  34 static unsigned int colopts;
  35 static int force_sign_annotate;
  36 static int config_sign_tag = -1; /* unspecified */
  37
  38 static int list_tags(struct ref_filter *filter, struct ref_sorting *sorting,
  39                      struct ref_format *format)
  40 {
  41         struct ref_array array;
  42         char *to_free = NULL;
  43         int i;
  44
  45         memset(&array, 0, sizeof(array));
  46
  47         if (filter->lines == -1)
  48                 filter->lines = 0;
  49
  50         if (!format->format) {
  51                 if (filter->lines) {
  52                         to_free = xstrfmt("%s %%(contents:lines=%d)",
  53                                           "%(align:15)%(refname:lstrip=2)%(end)",
  54                                           filter->lines);
  55                         format->format = to_free;
  56                 } else
  57                         format->format = "%(refname:lstrip=2)";
  58         }
  59
  60         if (verify_ref_format(format))
  61                 die(_("unable to parse format string"));
  62         filter->with_commit_tag_algo = 1;
  63         filter_refs(&array, filter, FILTER_REFS_TAGS);
  64         ref_array_sort(sorting, &array);
  65
  66         for (i = 0; i < array.nr; i++)
  67                 show_ref_array_item(array.items[i], format);
  68         ref_array_clear(&array);
  69         free(to_free);
  70
  71         return 0;
  72 }
  73
  74 typedef int (*each_tag_name_fn)(const char *name, const char *ref,
  75                                 const struct object_id *oid, const void *cb_data);
  76
  77 static int for_each_tag_name(const char **argv, each_tag_name_fn fn,
  78                              const void *cb_data)
  79 {
  80         const char **p;
  81         struct strbuf ref = STRBUF_INIT;
  82         int had_error = 0;
  83         struct object_id oid;
  84
  85         for (p = argv; *p; p++) {
  86                 strbuf_reset(&ref);
  87                 strbuf_addf(&ref, "refs/tags/%s", *p);
  88                 if (read_ref(ref.buf, &oid)) {
  89                         error(_("tag '%s' not found."), *p);
  90                         had_error = 1;
  91                         continue;
  92                 }
  93                 if (fn(*p, ref.buf, &oid, cb_data))
  94                         had_error = 1;
  95         }
  96         strbuf_release(&ref);
  97         return had_error;
  98 }
  99
 100 static int delete_tag(const char *name, const char *ref,
 101                       const struct object_id *oid, const void *cb_data)
 102 {
 103         if (delete_ref(NULL, ref, oid, 0))
 104                 return 1;
 105         printf(_("Deleted tag '%s' (was %s)\n"), name,
 106                find_unique_abbrev(oid, DEFAULT_ABBREV));
 107         return 0;
 108 }
 109
 110 static int verify_tag(const char *name, const char *ref,
 111                       const struct object_id *oid, const void *cb_data)
 112 {
 113         int flags;
 114         const struct ref_format *format = cb_data;
 115         flags = GPG_VERIFY_VERBOSE;
 116
 117         if (format->format)
 118                 flags = GPG_VERIFY_OMIT_STATUS;
 119
 120         if (gpg_verify_tag(oid, name, flags))
 121                 return -1;
 122
 123         if (format->format)
 124                 pretty_print_ref(name, oid, format);
 125
 126         return 0;
 127 }
 128
 129 static int do_sign(struct strbuf *buffer)
 130 {
 131         return sign_buffer(buffer, buffer, get_signing_key());
 132 }
 133
 134 static const char tag_template[] =
 135         N_("\nWrite a message for tag:\n  %s\n"
 136         "Lines starting with '%c' will be ignored.\n");
 137
 138 static const char tag_template_nocleanup[] =
 139         N_("\nWrite a message for tag:\n  %s\n"
 140         "Lines starting with '%c' will be kept; you may remove them"
 141         " yourself if you want to.\n");
 142
 143 static int git_tag_config(const char *var, const char *value, void *cb)
 144 {
 145         int status;
 146         struct ref_sorting **sorting_tail = (struct ref_sorting **)cb;
 147
 148         if (!strcmp(var, "tag.gpgsign")) {
 149                 config_sign_tag = git_config_bool(var, value);
 150                 return 0;
 151         }
 152
 153         if (!strcmp(var, "tag.sort")) {
 154                 if (!value)
 155                         return config_error_nonbool(var);
 156                 parse_ref_sorting(sorting_tail, value);
 157                 return 0;
 158         }
 159
 160         status = git_gpg_config(var, value, cb);
 161         if (status)
 162                 return status;
 163         if (!strcmp(var, "tag.forcesignannotated")) {
 164                 force_sign_annotate = git_config_bool(var, value);
 165                 return 0;
 166         }
 167
 168         if (starts_with(var, "column."))
 169                 return git_column_config(var, value, "tag", &colopts);
 170         return git_color_default_config(var, value, cb);
 171 }
 172
 173 static void write_tag_body(int fd, const struct object_id *oid)
 174 {
 175         unsigned long size;
 176         enum object_type type;
 177         char *buf, *sp, *orig;
 178         struct strbuf payload = STRBUF_INIT;
 179         struct strbuf signature = STRBUF_INIT;
 180
 181         orig = buf = read_object_file(oid, &type, &size);
 182         if (!buf)
 183                 return;
 184         if (parse_signature(buf, size, &payload, &signature)) {
 185                 buf = payload.buf;
 186                 size = payload.len;
 187         }
 188         /* skip header */
 189         sp = strstr(buf, "\n\n");
 190
 191         if (!sp || !size || type != OBJ_TAG) {
 192                 free(buf);
 193                 return;
 194         }
 195         sp += 2; /* skip the 2 LFs */
 196         write_or_die(fd, sp, buf + size - sp);
 197
 198         free(orig);
 199         strbuf_release(&payload);
 200         strbuf_release(&signature);
 201 }
 202
 203 static int build_tag_object(struct strbuf *buf, int sign, struct object_id *result)
 204 {
 205         if (sign && do_sign(buf) < 0)
 206                 return error(_("unable to sign the tag"));
 207         if (write_object_file(buf->buf, buf->len, tag_type, result) < 0)
 208                 return error(_("unable to write tag file"));
 209         return 0;
 210 }
 211
 212 struct create_tag_options {
 213         unsigned int message_given:1;
 214         unsigned int use_editor:1;
 215         unsigned int sign;
 216         enum {
 217                 CLEANUP_NONE,
 218                 CLEANUP_SPACE,
 219                 CLEANUP_ALL
 220         } cleanup_mode;
 221 };
 222
 223 static const char message_advice_nested_tag[] =
 224         N_("You have created a nested tag. The object referred to by your new tag is\n"
 225            "already a tag. If you meant to tag the object that it points to, use:\n"
 226            "\n"
 227            "\tgit tag -f %s %s^{}");
 228
 229 static void create_tag(const struct object_id *object, const char *object_ref,
 230                        const char *tag,
 231                        struct strbuf *buf, struct create_tag_options *opt,
 232                        struct object_id *prev, struct object_id *result)
 233 {
 234         enum object_type type;
 235         struct strbuf header = STRBUF_INIT;
 236         char *path = NULL;
 237
 238         type = oid_object_info(the_repository, object, NULL);
 239         if (type <= OBJ_NONE)
 240                 die(_("bad object type."));
 241
 242         if (type == OBJ_TAG)
 243                 advise_if_enabled(ADVICE_NESTED_TAG, _(message_advice_nested_tag),
 244                                   tag, object_ref);
 245
 246         strbuf_addf(&header,
 247                     "object %s\n"
 248                     "type %s\n"
 249                     "tag %s\n"
 250                     "tagger %s\n\n",
 251                     oid_to_hex(object),
 252                     type_name(type),
 253                     tag,
 254                     git_committer_info(IDENT_STRICT));
 255
 256         if (!opt->message_given || opt->use_editor) {
 257                 int fd;
 258
 259                 /* write the template message before editing: */
 260                 path = git_pathdup("TAG_EDITMSG");
 261                 fd = open(path, O_CREAT | O_TRUNC | O_WRONLY, 0600);
 262                 if (fd < 0)
 263                         die_errno(_("could not create file '%s'"), path);
 264
 265                 if (opt->message_given) {
 266                         write_or_die(fd, buf->buf, buf->len);
 267                         strbuf_reset(buf);
 268                 } else if (!is_null_oid(prev)) {
 269                         write_tag_body(fd, prev);
 270                 } else {
 271                         struct strbuf buf = STRBUF_INIT;
 272                         strbuf_addch(&buf, '\n');
 273                         if (opt->cleanup_mode == CLEANUP_ALL)
 274                                 strbuf_commented_addf(&buf, _(tag_template), tag, comment_line_char);
 275                         else
 276                                 strbuf_commented_addf(&buf, _(tag_template_nocleanup), tag, comment_line_char);
 277                         write_or_die(fd, buf.buf, buf.len);
 278                         strbuf_release(&buf);
 279                 }
 280                 close(fd);
 281
 282                 if (launch_editor(path, buf, NULL)) {
 283                         fprintf(stderr,
 284                         _("Please supply the message using either -m or -F option.\n"));
 285                         exit(1);
 286                 }
 287         }
 288
 289         if (opt->cleanup_mode != CLEANUP_NONE)
 290                 strbuf_stripspace(buf, opt->cleanup_mode == CLEANUP_ALL);
 291
 292         if (!opt->message_given && !buf->len)
 293                 die(_("no tag message?"));
 294
 295         strbuf_insert(buf, 0, header.buf, header.len);
 296         strbuf_release(&header);
 297
 298         if (build_tag_object(buf, opt->sign, result) < 0) {
 299                 if (path)
 300                         fprintf(stderr, _("The tag message has been left in %s\n"),
 301                                 path);
 302                 exit(128);
 303         }
 304         if (path) {
 305                 unlink_or_warn(path);
 306                 free(path);
 307         }
 308 }
 309
 310 static void create_reflog_msg(const struct object_id *oid, struct strbuf *sb)
 311 {
 312         enum object_type type;
 313         struct commit *c;
 314         char *buf;
 315         unsigned long size;
 316         int subject_len = 0;
 317         const char *subject_start;
 318
 319         char *rla = getenv("GIT_REFLOG_ACTION");
 320         if (rla) {
 321                 strbuf_addstr(sb, rla);
 322         } else {
 323                 strbuf_addstr(sb, "tag: tagging ");
 324                 strbuf_add_unique_abbrev(sb, oid, DEFAULT_ABBREV);
 325         }
 326
 327         strbuf_addstr(sb, " (");
 328         type = oid_object_info(the_repository, oid, NULL);
 329         switch (type) {
 330         default:
 331                 strbuf_addstr(sb, "object of unknown type");
 332                 break;
 333         case OBJ_COMMIT:
 334                 if ((buf = read_object_file(oid, &type, &size)) != NULL) {
 335                         subject_len = find_commit_subject(buf, &subject_start);
 336                         strbuf_insert(sb, sb->len, subject_start, subject_len);
 337                 } else {
 338                         strbuf_addstr(sb, "commit object");
 339                 }
 340                 free(buf);
 341
 342                 if ((c = lookup_commit_reference(the_repository, oid)) != NULL)
 343                         strbuf_addf(sb, ", %s", show_date(c->date, 0, DATE_MODE(SHORT)));
 344                 break;
 345         case OBJ_TREE:
 346                 strbuf_addstr(sb, "tree object");
 347                 break;
 348         case OBJ_BLOB:
 349                 strbuf_addstr(sb, "blob object");
 350                 break;
 351         case OBJ_TAG:
 352                 strbuf_addstr(sb, "other tag object");
 353                 break;
 354         }
 355         strbuf_addch(sb, ')');
 356 }
 357
 358 struct msg_arg {
 359         int given;
 360         struct strbuf buf;
 361 };
 362
 363 static int parse_msg_arg(const struct option *opt, const char *arg, int unset)
 364 {
 365         struct msg_arg *msg = opt->value;
 366
 367         BUG_ON_OPT_NEG(unset);
 368
 369         if (!arg)
 370                 return -1;
 371         if (msg->buf.len)
 372                 strbuf_addstr(&(msg->buf), "\n\n");
 373         strbuf_addstr(&(msg->buf), arg);
 374         msg->given = 1;
 375         return 0;
 376 }
 377
 378 static int strbuf_check_tag_ref(struct strbuf *sb, const char *name)
 379 {
 380         if (name[0] == '-')
 381                 return -1;
 382
 383         strbuf_reset(sb);
 384         strbuf_addf(sb, "refs/tags/%s", name);
 385
 386         return check_refname_format(sb->buf, 0);
 387 }
 388
 389 int cmd_tag(int argc, const char **argv, const char *prefix)
 390 {
 391         struct strbuf buf = STRBUF_INIT;
 392         struct strbuf ref = STRBUF_INIT;
 393         struct strbuf reflog_msg = STRBUF_INIT;
 394         struct object_id object, prev;
 395         const char *object_ref, *tag;
 396         struct create_tag_options opt;
 397         char *cleanup_arg = NULL;
 398         int create_reflog = 0;
 399         int annotate = 0, force = 0;
 400         int cmdmode = 0, create_tag_object = 0;
 401         const char *msgfile = NULL, *keyid = NULL;
 402         struct msg_arg msg = { 0, STRBUF_INIT };
 403         struct ref_transaction *transaction;
 404         struct strbuf err = STRBUF_INIT;
 405         struct ref_filter filter;
 406         static struct ref_sorting *sorting = NULL, **sorting_tail = &sorting;
 407         struct ref_format format = REF_FORMAT_INIT;
 408         int icase = 0;
 409         int edit_flag = 0;
 410         struct option options[] = {
 411                 OPT_CMDMODE('l', "list", &cmdmode, N_("list tag names"), 'l'),
 412                 { OPTION_INTEGER, 'n', NULL, &filter.lines, N_("n"),
 413                                 N_("print <n> lines of each tag message"),
 414                                 PARSE_OPT_OPTARG, NULL, 1 },
 415                 OPT_CMDMODE('d', "delete", &cmdmode, N_("delete tags"), 'd'),
 416                 OPT_CMDMODE('v', "verify", &cmdmode, N_("verify tags"), 'v'),
 417
 418                 OPT_GROUP(N_("Tag creation options")),
 419                 OPT_BOOL('a', "annotate", &annotate,
 420                                         N_("annotated tag, needs a message")),
 421                 OPT_CALLBACK_F('m', "message", &msg, N_("message"),
 422                                N_("tag message"), PARSE_OPT_NONEG, parse_msg_arg),
 423                 OPT_FILENAME('F', "file", &msgfile, N_("read message from file")),
 424                 OPT_BOOL('e', "edit", &edit_flag, N_("force edit of tag message")),
 425                 OPT_BOOL('s', "sign", &opt.sign, N_("annotated and GPG-signed tag")),
 426                 OPT_CLEANUP(&cleanup_arg),
 427                 OPT_STRING('u', "local-user", &keyid, N_("key-id"),
 428                                         N_("use another key to sign the tag")),
 429                 OPT__FORCE(&force, N_("replace the tag if exists"), 0),
 430                 OPT_BOOL(0, "create-reflog", &create_reflog, N_("create a reflog")),
 431
 432                 OPT_GROUP(N_("Tag listing options")),
 433                 OPT_COLUMN(0, "column", &colopts, N_("show tag list in columns")),
 434                 OPT_CONTAINS(&filter.with_commit, N_("print only tags that contain the commit")),
 435                 OPT_NO_CONTAINS(&filter.no_commit, N_("print only tags that don't contain the commit")),
 436                 OPT_WITH(&filter.with_commit, N_("print only tags that contain the commit")),
 437                 OPT_WITHOUT(&filter.no_commit, N_("print only tags that don't contain the commit")),
 438                 OPT_MERGED(&filter, N_("print only tags that are merged")),
 439                 OPT_NO_MERGED(&filter, N_("print only tags that are not merged")),
 440                 OPT_REF_SORT(sorting_tail),
 441                 {
 442                         OPTION_CALLBACK, 0, "points-at", &filter.points_at, N_("object"),
 443                         N_("print only tags of the object"), PARSE_OPT_LASTARG_DEFAULT,
 444                         parse_opt_object_name, (intptr_t) "HEAD"
 445                 },
 446                 OPT_STRING(  0 , "format", &format.format, N_("format"),
 447                            N_("format to use for the output")),
 448                 OPT__COLOR(&format.use_color, N_("respect format colors")),
 449                 OPT_BOOL('i', "ignore-case", &icase, N_("sorting and filtering are case insensitive")),
 450                 OPT_END()
 451         };
 452
 453         setup_ref_filter_porcelain_msg();
 454
 455         git_config(git_tag_config, sorting_tail);
 456
 457         memset(&opt, 0, sizeof(opt));
 458         memset(&filter, 0, sizeof(filter));
 459         filter.lines = -1;
 460         opt.sign = -1;
 461
 462         argc = parse_options(argc, argv, prefix, options, git_tag_usage, 0);
 463
 464         if (!cmdmode) {
 465                 if (argc == 0)
 466                         cmdmode = 'l';
 467                 else if (filter.with_commit || filter.no_commit ||
 468                          filter.reachable_from || filter.unreachable_from ||
 469                          filter.points_at.nr || filter.lines != -1)
 470                         cmdmode = 'l';
 471         }
 472
 473         if (cmdmode == 'l')
 474                 setup_auto_pager("tag", 1);
 475
 476         if (opt.sign == -1)
 477                 opt.sign = cmdmode ? 0 : config_sign_tag > 0;
 478
 479         if (keyid) {
 480                 opt.sign = 1;
 481                 set_signing_key(keyid);
 482         }
 483         create_tag_object = (opt.sign || annotate || msg.given || msgfile);
 484
 485         if ((create_tag_object || force) && (cmdmode != 0))
 486                 usage_with_options(git_tag_usage, options);
 487
 488         finalize_colopts(&colopts, -1);
 489         if (cmdmode == 'l' && filter.lines != -1) {
 490                 if (explicitly_enable_column(colopts))
 491                         die(_("--column and -n are incompatible"));
 492                 colopts = 0;
 493         }
 494         if (!sorting)
 495                 sorting = ref_default_sorting();
 496         ref_sorting_icase_all(sorting, icase);
 497         filter.ignore_case = icase;
 498         if (cmdmode == 'l') {
 499                 int ret;
 500                 if (column_active(colopts)) {
 501                         struct column_options copts;
 502                         memset(&copts, 0, sizeof(copts));
 503                         copts.padding = 2;
 504                         run_column_filter(colopts, &copts);
 505                 }
 506                 filter.name_patterns = argv;
 507                 ret = list_tags(&filter, sorting, &format);
 508                 if (column_active(colopts))
 509                         stop_column_filter();
 510                 return ret;
 511         }
 512         if (filter.lines != -1)
 513                 die(_("-n option is only allowed in list mode"));
 514         if (filter.with_commit)
 515                 die(_("--contains option is only allowed in list mode"));
 516         if (filter.no_commit)
 517                 die(_("--no-contains option is only allowed in list mode"));
 518         if (filter.points_at.nr)
 519                 die(_("--points-at option is only allowed in list mode"));
 520         if (filter.reachable_from || filter.unreachable_from)
 521                 die(_("--merged and --no-merged options are only allowed in list mode"));
 522         if (cmdmode == 'd')
 523                 return for_each_tag_name(argv, delete_tag, NULL);
 524         if (cmdmode == 'v') {
 525                 if (format.format && verify_ref_format(&format))
 526                         usage_with_options(git_tag_usage, options);
 527                 return for_each_tag_name(argv, verify_tag, &format);
 528         }
 529
 530         if (msg.given || msgfile) {
 531                 if (msg.given && msgfile)
 532                         die(_("only one -F or -m option is allowed."));
 533                 if (msg.given)
 534                         strbuf_addbuf(&buf, &(msg.buf));
 535                 else {
 536                         if (!strcmp(msgfile, "-")) {
 537                                 if (strbuf_read(&buf, 0, 1024) < 0)
 538                                         die_errno(_("cannot read '%s'"), msgfile);
 539                         } else {
 540                                 if (strbuf_read_file(&buf, msgfile, 1024) < 0)
 541                                         die_errno(_("could not open or read '%s'"),
 542                                                 msgfile);
 543                         }
 544                 }
 545         }
 546
 547         tag = argv[0];
 548
 549         object_ref = argc == 2 ? argv[1] : "HEAD";
 550         if (argc > 2)
 551                 die(_("too many params"));
 552
 553         if (get_oid(object_ref, &object))
 554                 die(_("Failed to resolve '%s' as a valid ref."), object_ref);
 555
 556         if (strbuf_check_tag_ref(&ref, tag))
 557                 die(_("'%s' is not a valid tag name."), tag);
 558
 559         if (read_ref(ref.buf, &prev))
 560                 oidclr(&prev);
 561         else if (!force)
 562                 die(_("tag '%s' already exists"), tag);
 563
 564         opt.message_given = msg.given || msgfile;
 565         opt.use_editor = edit_flag;
 566
 567         if (!cleanup_arg || !strcmp(cleanup_arg, "strip"))
 568                 opt.cleanup_mode = CLEANUP_ALL;
 569         else if (!strcmp(cleanup_arg, "verbatim"))
 570                 opt.cleanup_mode = CLEANUP_NONE;
 571         else if (!strcmp(cleanup_arg, "whitespace"))
 572                 opt.cleanup_mode = CLEANUP_SPACE;
 573         else
 574                 die(_("Invalid cleanup mode %s"), cleanup_arg);
 575
 576         create_reflog_msg(&object, &reflog_msg);
 577
 578         if (create_tag_object) {
 579                 if (force_sign_annotate && !annotate)
 580                         opt.sign = 1;
 581                 create_tag(&object, object_ref, tag, &buf, &opt, &prev, &object);
 582         }
 583
 584         transaction = ref_transaction_begin(&err);
 585         if (!transaction ||
 586             ref_transaction_update(transaction, ref.buf, &object, &prev,
 587                                    create_reflog ? REF_FORCE_CREATE_REFLOG : 0,
 588                                    reflog_msg.buf, &err) ||
 589             ref_transaction_commit(transaction, &err))
 590                 die("%s", err.buf);
 591         ref_transaction_free(transaction);
 592         if (force && !is_null_oid(&prev) && !oideq(&prev, &object))
 593                 printf(_("Updated tag '%s' (was %s)\n"), tag,
 594                        find_unique_abbrev(&prev, DEFAULT_ABBREV));
 595
 596         UNLEAK(buf);
 597         UNLEAK(ref);
 598         UNLEAK(reflog_msg);
 599         UNLEAK(msg);
 600         UNLEAK(err);
 601         return 0;
 602 }