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 #include "ref-filter.h"
  21
  22 static const char * const git_tag_usage[] = {
  23         N_("git tag [-a | -s | -u <key-id>] [-f] [-m <msg> | -F <file>] <tagname> [<head>]"),
  24         N_("git tag -d <tagname>..."),
  25         N_("git tag -l [-n[<num>]] [--contains <commit>] [--no-contains <commit>] [--points-at <object>]"
  26                 "\n\t\t[--format=<format>] [--[no-]merged [<commit>]] [<pattern>...]"),
  27         N_("git tag -v [--format=<format>] <tagname>..."),
  28         NULL
  29 };
  30
  31 static unsigned int colopts;
  32 static int force_sign_annotate;
  33
  34 static int list_tags(struct ref_filter *filter, struct ref_sorting *sorting, const char *format)
  35 {
  36         struct ref_array array;
  37         char *to_free = NULL;
  38         int i;
  39
  40         memset(&array, 0, sizeof(array));
  41
  42         if (filter->lines == -1)
  43                 filter->lines = 0;
  44
  45         if (!format) {
  46                 if (filter->lines) {
  47                         to_free = xstrfmt("%s %%(contents:lines=%d)",
  48                                           "%(align:15)%(refname:lstrip=2)%(end)",
  49                                           filter->lines);
  50                         format = to_free;
  51                 } else
  52                         format = "%(refname:lstrip=2)";
  53         }
  54
  55         verify_ref_format(format);
  56         filter->with_commit_tag_algo = 1;
  57         filter_refs(&array, filter, FILTER_REFS_TAGS);
  58         ref_array_sort(sorting, &array);
  59
  60         for (i = 0; i < array.nr; i++)
  61                 show_ref_array_item(array.items[i], format, 0);
  62         ref_array_clear(&array);
  63         free(to_free);
  64
  65         return 0;
  66 }
  67
  68 typedef int (*each_tag_name_fn)(const char *name, const char *ref,
  69                                 const unsigned char *sha1, const void *cb_data);
  70
  71 static int for_each_tag_name(const char **argv, each_tag_name_fn fn,
  72                              const void *cb_data)
  73 {
  74         const char **p;
  75         struct strbuf ref = STRBUF_INIT;
  76         int had_error = 0;
  77         unsigned char sha1[20];
  78
  79         for (p = argv; *p; p++) {
  80                 strbuf_reset(&ref);
  81                 strbuf_addf(&ref, "refs/tags/%s", *p);
  82                 if (read_ref(ref.buf, sha1)) {
  83                         error(_("tag '%s' not found."), *p);
  84                         had_error = 1;
  85                         continue;
  86                 }
  87                 if (fn(*p, ref.buf, sha1, cb_data))
  88                         had_error = 1;
  89         }
  90         strbuf_release(&ref);
  91         return had_error;
  92 }
  93
  94 static int delete_tag(const char *name, const char *ref,
  95                       const unsigned char *sha1, const void *cb_data)
  96 {
  97         if (delete_ref(NULL, ref, sha1, 0))
  98                 return 1;
  99         printf(_("Deleted tag '%s' (was %s)\n"), name, find_unique_abbrev(sha1, DEFAULT_ABBREV));
 100         return 0;
 101 }
 102
 103 static int verify_tag(const char *name, const char *ref,
 104                       const unsigned char *sha1, const void *cb_data)
 105 {
 106         int flags;
 107         const char *fmt_pretty = cb_data;
 108         flags = GPG_VERIFY_VERBOSE;
 109
 110         if (fmt_pretty)
 111                 flags = GPG_VERIFY_OMIT_STATUS;
 112
 113         if (gpg_verify_tag(sha1, name, flags))
 114                 return -1;
 115
 116         if (fmt_pretty)
 117                 pretty_print_ref(name, sha1, fmt_pretty);
 118
 119         return 0;
 120 }
 121
 122 static int do_sign(struct strbuf *buffer)
 123 {
 124         return sign_buffer(buffer, buffer, get_signing_key());
 125 }
 126
 127 static const char tag_template[] =
 128         N_("\nWrite a message for tag:\n  %s\n"
 129         "Lines starting with '%c' will be ignored.\n");
 130
 131 static const char tag_template_nocleanup[] =
 132         N_("\nWrite a message for tag:\n  %s\n"
 133         "Lines starting with '%c' will be kept; you may remove them"
 134         " yourself if you want to.\n");
 135
 136 /* Parse arg given and add it the ref_sorting array */
 137 static int parse_sorting_string(const char *arg, struct ref_sorting **sorting_tail)
 138 {
 139         struct ref_sorting *s;
 140         int len;
 141
 142         s = xcalloc(1, sizeof(*s));
 143         s->next = *sorting_tail;
 144         *sorting_tail = s;
 145
 146         if (*arg == '-') {
 147                 s->reverse = 1;
 148                 arg++;
 149         }
 150         if (skip_prefix(arg, "version:", &arg) ||
 151             skip_prefix(arg, "v:", &arg))
 152                 s->version = 1;
 153
 154         len = strlen(arg);
 155         s->atom = parse_ref_filter_atom(arg, arg+len);
 156
 157         return 0;
 158 }
 159
 160 static int git_tag_config(const char *var, const char *value, void *cb)
 161 {
 162         int status;
 163         struct ref_sorting **sorting_tail = (struct ref_sorting **)cb;
 164
 165         if (!strcmp(var, "tag.sort")) {
 166                 if (!value)
 167                         return config_error_nonbool(var);
 168                 parse_sorting_string(value, sorting_tail);
 169                 return 0;
 170         }
 171
 172         status = git_gpg_config(var, value, cb);
 173         if (status)
 174                 return status;
 175         if (!strcmp(var, "tag.forcesignannotated")) {
 176                 force_sign_annotate = git_config_bool(var, value);
 177                 return 0;
 178         }
 179
 180         if (starts_with(var, "column."))
 181                 return git_column_config(var, value, "tag", &colopts);
 182         return git_default_config(var, value, cb);
 183 }
 184
 185 static void write_tag_body(int fd, const unsigned char *sha1)
 186 {
 187         unsigned long size;
 188         enum object_type type;
 189         char *buf, *sp;
 190
 191         buf = read_sha1_file(sha1, &type, &size);
 192         if (!buf)
 193                 return;
 194         /* skip header */
 195         sp = strstr(buf, "\n\n");
 196
 197         if (!sp || !size || type != OBJ_TAG) {
 198                 free(buf);
 199                 return;
 200         }
 201         sp += 2; /* skip the 2 LFs */
 202         write_or_die(fd, sp, parse_signature(sp, buf + size - sp));
 203
 204         free(buf);
 205 }
 206
 207 static int build_tag_object(struct strbuf *buf, int sign, unsigned char *result)
 208 {
 209         if (sign && do_sign(buf) < 0)
 210                 return error(_("unable to sign the tag"));
 211         if (write_sha1_file(buf->buf, buf->len, tag_type, result) < 0)
 212                 return error(_("unable to write tag file"));
 213         return 0;
 214 }
 215
 216 struct create_tag_options {
 217         unsigned int message_given:1;
 218         unsigned int sign;
 219         enum {
 220                 CLEANUP_NONE,
 221                 CLEANUP_SPACE,
 222                 CLEANUP_ALL
 223         } cleanup_mode;
 224 };
 225
 226 static void create_tag(const unsigned char *object, const char *tag,
 227                        struct strbuf *buf, struct create_tag_options *opt,
 228                        unsigned char *prev, unsigned char *result)
 229 {
 230         enum object_type type;
 231         struct strbuf header = STRBUF_INIT;
 232         char *path = NULL;
 233
 234         type = sha1_object_info(object, NULL);
 235         if (type <= OBJ_NONE)
 236             die(_("bad object type."));
 237
 238         strbuf_addf(&header,
 239                     "object %s\n"
 240                     "type %s\n"
 241                     "tag %s\n"
 242                     "tagger %s\n\n",
 243                     sha1_to_hex(object),
 244                     typename(type),
 245                     tag,
 246                     git_committer_info(IDENT_STRICT));
 247
 248         if (!opt->message_given) {
 249                 int fd;
 250
 251                 /* write the template message before editing: */
 252                 path = git_pathdup("TAG_EDITMSG");
 253                 fd = open(path, O_CREAT | O_TRUNC | O_WRONLY, 0600);
 254                 if (fd < 0)
 255                         die_errno(_("could not create file '%s'"), path);
 256
 257                 if (!is_null_sha1(prev)) {
 258                         write_tag_body(fd, prev);
 259                 } else {
 260                         struct strbuf buf = STRBUF_INIT;
 261                         strbuf_addch(&buf, '\n');
 262                         if (opt->cleanup_mode == CLEANUP_ALL)
 263                                 strbuf_commented_addf(&buf, _(tag_template), tag, comment_line_char);
 264                         else
 265                                 strbuf_commented_addf(&buf, _(tag_template_nocleanup), tag, comment_line_char);
 266                         write_or_die(fd, buf.buf, buf.len);
 267                         strbuf_release(&buf);
 268                 }
 269                 close(fd);
 270
 271                 if (launch_editor(path, buf, NULL)) {
 272                         fprintf(stderr,
 273                         _("Please supply the message using either -m or -F option.\n"));
 274                         exit(1);
 275                 }
 276         }
 277
 278         if (opt->cleanup_mode != CLEANUP_NONE)
 279                 strbuf_stripspace(buf, opt->cleanup_mode == CLEANUP_ALL);
 280
 281         if (!opt->message_given && !buf->len)
 282                 die(_("no tag message?"));
 283
 284         strbuf_insert(buf, 0, header.buf, header.len);
 285         strbuf_release(&header);
 286
 287         if (build_tag_object(buf, opt->sign, result) < 0) {
 288                 if (path)
 289                         fprintf(stderr, _("The tag message has been left in %s\n"),
 290                                 path);
 291                 exit(128);
 292         }
 293         if (path) {
 294                 unlink_or_warn(path);
 295                 free(path);
 296         }
 297 }
 298
 299 static void create_reflog_msg(const unsigned char *sha1, struct strbuf *sb)
 300 {
 301         enum object_type type;
 302         struct commit *c;
 303         char *buf;
 304         unsigned long size;
 305         int subject_len = 0;
 306         const char *subject_start;
 307
 308         char *rla = getenv("GIT_REFLOG_ACTION");
 309         if (rla) {
 310                 strbuf_addstr(sb, rla);
 311         } else {
 312                 strbuf_addstr(sb, "tag: tagging ");
 313                 strbuf_add_unique_abbrev(sb, sha1, DEFAULT_ABBREV);
 314         }
 315
 316         strbuf_addstr(sb, " (");
 317         type = sha1_object_info(sha1, NULL);
 318         switch (type) {
 319         default:
 320                 strbuf_addstr(sb, "object of unknown type");
 321                 break;
 322         case OBJ_COMMIT:
 323                 if ((buf = read_sha1_file(sha1, &type, &size)) != NULL) {
 324                         subject_len = find_commit_subject(buf, &subject_start);
 325                         strbuf_insert(sb, sb->len, subject_start, subject_len);
 326                 } else {
 327                         strbuf_addstr(sb, "commit object");
 328                 }
 329                 free(buf);
 330
 331                 if ((c = lookup_commit_reference(sha1)) != NULL)
 332                         strbuf_addf(sb, ", %s", show_date(c->date, 0, DATE_MODE(SHORT)));
 333                 break;
 334         case OBJ_TREE:
 335                 strbuf_addstr(sb, "tree object");
 336                 break;
 337         case OBJ_BLOB:
 338                 strbuf_addstr(sb, "blob object");
 339                 break;
 340         case OBJ_TAG:
 341                 strbuf_addstr(sb, "other tag object");
 342                 break;
 343         }
 344         strbuf_addch(sb, ')');
 345 }
 346
 347 struct msg_arg {
 348         int given;
 349         struct strbuf buf;
 350 };
 351
 352 static int parse_msg_arg(const struct option *opt, const char *arg, int unset)
 353 {
 354         struct msg_arg *msg = opt->value;
 355
 356         if (!arg)
 357                 return -1;
 358         if (msg->buf.len)
 359                 strbuf_addstr(&(msg->buf), "\n\n");
 360         strbuf_addstr(&(msg->buf), arg);
 361         msg->given = 1;
 362         return 0;
 363 }
 364
 365 static int strbuf_check_tag_ref(struct strbuf *sb, const char *name)
 366 {
 367         if (name[0] == '-')
 368                 return -1;
 369
 370         strbuf_reset(sb);
 371         strbuf_addf(sb, "refs/tags/%s", name);
 372
 373         return check_refname_format(sb->buf, 0);
 374 }
 375
 376 int cmd_tag(int argc, const char **argv, const char *prefix)
 377 {
 378         struct strbuf buf = STRBUF_INIT;
 379         struct strbuf ref = STRBUF_INIT;
 380         struct strbuf reflog_msg = STRBUF_INIT;
 381         unsigned char object[20], prev[20];
 382         const char *object_ref, *tag;
 383         struct create_tag_options opt;
 384         char *cleanup_arg = NULL;
 385         int create_reflog = 0;
 386         int annotate = 0, force = 0;
 387         int cmdmode = 0, create_tag_object = 0;
 388         const char *msgfile = NULL, *keyid = NULL;
 389         struct msg_arg msg = { 0, STRBUF_INIT };
 390         struct ref_transaction *transaction;
 391         struct strbuf err = STRBUF_INIT;
 392         struct ref_filter filter;
 393         static struct ref_sorting *sorting = NULL, **sorting_tail = &sorting;
 394         const char *format = NULL;
 395         int icase = 0;
 396         struct option options[] = {
 397                 OPT_CMDMODE('l', "list", &cmdmode, N_("list tag names"), 'l'),
 398                 { OPTION_INTEGER, 'n', NULL, &filter.lines, N_("n"),
 399                                 N_("print <n> lines of each tag message"),
 400                                 PARSE_OPT_OPTARG, NULL, 1 },
 401                 OPT_CMDMODE('d', "delete", &cmdmode, N_("delete tags"), 'd'),
 402                 OPT_CMDMODE('v', "verify", &cmdmode, N_("verify tags"), 'v'),
 403
 404                 OPT_GROUP(N_("Tag creation options")),
 405                 OPT_BOOL('a', "annotate", &annotate,
 406                                         N_("annotated tag, needs a message")),
 407                 OPT_CALLBACK('m', "message", &msg, N_("message"),
 408                              N_("tag message"), parse_msg_arg),
 409                 OPT_FILENAME('F', "file", &msgfile, N_("read message from file")),
 410                 OPT_BOOL('s', "sign", &opt.sign, N_("annotated and GPG-signed tag")),
 411                 OPT_STRING(0, "cleanup", &cleanup_arg, N_("mode"),
 412                         N_("how to strip spaces and #comments from message")),
 413                 OPT_STRING('u', "local-user", &keyid, N_("key-id"),
 414                                         N_("use another key to sign the tag")),
 415                 OPT__FORCE(&force, N_("replace the tag if exists")),
 416                 OPT_BOOL(0, "create-reflog", &create_reflog, N_("create a reflog")),
 417
 418                 OPT_GROUP(N_("Tag listing options")),
 419                 OPT_COLUMN(0, "column", &colopts, N_("show tag list in columns")),
 420                 OPT_CONTAINS(&filter.with_commit, N_("print only tags that contain the commit")),
 421                 OPT_NO_CONTAINS(&filter.no_commit, N_("print only tags that don't contain the commit")),
 422                 OPT_WITH(&filter.with_commit, N_("print only tags that contain the commit")),
 423                 OPT_WITHOUT(&filter.no_commit, N_("print only tags that don't contain the commit")),
 424                 OPT_MERGED(&filter, N_("print only tags that are merged")),
 425                 OPT_NO_MERGED(&filter, N_("print only tags that are not merged")),
 426                 OPT_CALLBACK(0 , "sort", sorting_tail, N_("key"),
 427                              N_("field name to sort on"), &parse_opt_ref_sorting),
 428                 {
 429                         OPTION_CALLBACK, 0, "points-at", &filter.points_at, N_("object"),
 430                         N_("print only tags of the object"), PARSE_OPT_LASTARG_DEFAULT,
 431                         parse_opt_object_name, (intptr_t) "HEAD"
 432                 },
 433                 OPT_STRING(  0 , "format", &format, N_("format"), N_("format to use for the output")),
 434                 OPT_BOOL('i', "ignore-case", &icase, N_("sorting and filtering are case insensitive")),
 435                 OPT_END()
 436         };
 437
 438         setup_ref_filter_porcelain_msg();
 439
 440         git_config(git_tag_config, sorting_tail);
 441
 442         memset(&opt, 0, sizeof(opt));
 443         memset(&filter, 0, sizeof(filter));
 444         filter.lines = -1;
 445
 446         argc = parse_options(argc, argv, prefix, options, git_tag_usage, 0);
 447
 448         if (keyid) {
 449                 opt.sign = 1;
 450                 set_signing_key(keyid);
 451         }
 452         create_tag_object = (opt.sign || annotate || msg.given || msgfile);
 453
 454         if (!cmdmode) {
 455                 if (argc == 0)
 456                         cmdmode = 'l';
 457                 else if (filter.with_commit || filter.no_commit ||
 458                          filter.points_at.nr || filter.merge_commit ||
 459                          filter.lines != -1)
 460                         cmdmode = 'l';
 461         }
 462
 463         if ((create_tag_object || force) && (cmdmode != 0))
 464                 usage_with_options(git_tag_usage, options);
 465
 466         finalize_colopts(&colopts, -1);
 467         if (cmdmode == 'l' && filter.lines != -1) {
 468                 if (explicitly_enable_column(colopts))
 469                         die(_("--column and -n are incompatible"));
 470                 colopts = 0;
 471         }
 472         if (!sorting)
 473                 sorting = ref_default_sorting();
 474         sorting->ignore_case = icase;
 475         filter.ignore_case = icase;
 476         if (cmdmode == 'l') {
 477                 int ret;
 478                 if (column_active(colopts)) {
 479                         struct column_options copts;
 480                         memset(&copts, 0, sizeof(copts));
 481                         copts.padding = 2;
 482                         run_column_filter(colopts, &copts);
 483                 }
 484                 filter.name_patterns = argv;
 485                 ret = list_tags(&filter, sorting, format);
 486                 if (column_active(colopts))
 487                         stop_column_filter();
 488                 return ret;
 489         }
 490         if (filter.lines != -1)
 491                 die(_("-n option is only allowed in list mode"));
 492         if (filter.with_commit)
 493                 die(_("--contains option is only allowed in list mode"));
 494         if (filter.no_commit)
 495                 die(_("--no-contains option is only allowed in list mode"));
 496         if (filter.points_at.nr)
 497                 die(_("--points-at option is only allowed in list mode"));
 498         if (filter.merge_commit)
 499                 die(_("--merged and --no-merged options are only allowed in list mode"));
 500         if (cmdmode == 'd')
 501                 return for_each_tag_name(argv, delete_tag, NULL);
 502         if (cmdmode == 'v') {
 503                 if (format)
 504                         verify_ref_format(format);
 505                 return for_each_tag_name(argv, verify_tag, format);
 506         }
 507
 508         if (msg.given || msgfile) {
 509                 if (msg.given && msgfile)
 510                         die(_("only one -F or -m option is allowed."));
 511                 if (msg.given)
 512                         strbuf_addbuf(&buf, &(msg.buf));
 513                 else {
 514                         if (!strcmp(msgfile, "-")) {
 515                                 if (strbuf_read(&buf, 0, 1024) < 0)
 516                                         die_errno(_("cannot read '%s'"), msgfile);
 517                         } else {
 518                                 if (strbuf_read_file(&buf, msgfile, 1024) < 0)
 519                                         die_errno(_("could not open or read '%s'"),
 520                                                 msgfile);
 521                         }
 522                 }
 523         }
 524
 525         tag = argv[0];
 526
 527         object_ref = argc == 2 ? argv[1] : "HEAD";
 528         if (argc > 2)
 529                 die(_("too many params"));
 530
 531         if (get_sha1(object_ref, object))
 532                 die(_("Failed to resolve '%s' as a valid ref."), object_ref);
 533
 534         if (strbuf_check_tag_ref(&ref, tag))
 535                 die(_("'%s' is not a valid tag name."), tag);
 536
 537         if (read_ref(ref.buf, prev))
 538                 hashclr(prev);
 539         else if (!force)
 540                 die(_("tag '%s' already exists"), tag);
 541
 542         opt.message_given = msg.given || msgfile;
 543
 544         if (!cleanup_arg || !strcmp(cleanup_arg, "strip"))
 545                 opt.cleanup_mode = CLEANUP_ALL;
 546         else if (!strcmp(cleanup_arg, "verbatim"))
 547                 opt.cleanup_mode = CLEANUP_NONE;
 548         else if (!strcmp(cleanup_arg, "whitespace"))
 549                 opt.cleanup_mode = CLEANUP_SPACE;
 550         else
 551                 die(_("Invalid cleanup mode %s"), cleanup_arg);
 552
 553         create_reflog_msg(object, &reflog_msg);
 554
 555         if (create_tag_object) {
 556                 if (force_sign_annotate && !annotate)
 557                         opt.sign = 1;
 558                 create_tag(object, tag, &buf, &opt, prev, object);
 559         }
 560
 561         transaction = ref_transaction_begin(&err);
 562         if (!transaction ||
 563             ref_transaction_update(transaction, ref.buf, object, prev,
 564                                    create_reflog ? REF_FORCE_CREATE_REFLOG : 0,
 565                                    reflog_msg.buf, &err) ||
 566             ref_transaction_commit(transaction, &err))
 567                 die("%s", err.buf);
 568         ref_transaction_free(transaction);
 569         if (force && !is_null_sha1(prev) && hashcmp(prev, object))
 570                 printf(_("Updated tag '%s' (was %s)\n"), tag, find_unique_abbrev(prev, DEFAULT_ABBREV));
 571
 572         strbuf_release(&err);
 573         strbuf_release(&buf);
 574         strbuf_release(&ref);
 575         strbuf_release(&reflog_msg);
 576         return 0;
 577 }