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>] [--points-at <object>]"
  26                 "\n\t\t[--format=<format>] [--[no-]merged [<commit>]] [<pattern>...]"),
  27         N_("git tag -v <tagname>..."),
  28         NULL
  29 };
  30
  31 static unsigned int colopts;
  32
  33 static int list_tags(struct ref_filter *filter, struct ref_sorting *sorting, const char *format)
  34 {
  35         struct ref_array array;
  36         char *to_free = NULL;
  37         int i;
  38
  39         memset(&array, 0, sizeof(array));
  40
  41         if (filter->lines == -1)
  42                 filter->lines = 0;
  43
  44         if (!format) {
  45                 if (filter->lines) {
  46                         to_free = xstrfmt("%s %%(contents:lines=%d)",
  47                                           "%(align:15)%(refname:strip=2)%(end)",
  48                                           filter->lines);
  49                         format = to_free;
  50                 } else
  51                         format = "%(refname:strip=2)";
  52         }
  53
  54         verify_ref_format(format);
  55         filter->with_commit_tag_algo = 1;
  56         filter_refs(&array, filter, FILTER_REFS_TAGS);
  57         ref_array_sort(sorting, &array);
  58
  59         for (i = 0; i < array.nr; i++)
  60                 show_ref_array_item(array.items[i], format, 0);
  61         ref_array_clear(&array);
  62         free(to_free);
  63
  64         return 0;
  65 }
  66
  67 typedef int (*each_tag_name_fn)(const char *name, const char *ref,
  68                                 const unsigned char *sha1);
  69
  70 static int for_each_tag_name(const char **argv, each_tag_name_fn fn)
  71 {
  72         const char **p;
  73         char ref[PATH_MAX];
  74         int had_error = 0;
  75         unsigned char sha1[20];
  76
  77         for (p = argv; *p; p++) {
  78                 if (snprintf(ref, sizeof(ref), "refs/tags/%s", *p)
  79                                         >= sizeof(ref)) {
  80                         error(_("tag name too long: %.*s..."), 50, *p);
  81                         had_error = 1;
  82                         continue;
  83                 }
  84                 if (read_ref(ref, sha1)) {
  85                         error(_("tag '%s' not found."), *p);
  86                         had_error = 1;
  87                         continue;
  88                 }
  89                 if (fn(*p, ref, sha1))
  90                         had_error = 1;
  91         }
  92         return had_error;
  93 }
  94
  95 static int delete_tag(const char *name, const char *ref,
  96                                 const unsigned char *sha1)
  97 {
  98         if (delete_ref(ref, sha1, 0))
  99                 return 1;
 100         printf(_("Deleted tag '%s' (was %s)\n"), name, find_unique_abbrev(sha1, DEFAULT_ABBREV));
 101         return 0;
 102 }
 103
 104 static int verify_tag(const char *name, const char *ref,
 105                                 const unsigned char *sha1)
 106 {
 107         const char *argv_verify_tag[] = {"verify-tag",
 108                                         "-v", "SHA1_HEX", NULL};
 109         argv_verify_tag[2] = sha1_to_hex(sha1);
 110
 111         if (run_command_v_opt(argv_verify_tag, RUN_GIT_CMD))
 112                 return error(_("could not verify the tag '%s'"), name);
 113         return 0;
 114 }
 115
 116 static int do_sign(struct strbuf *buffer)
 117 {
 118         return sign_buffer(buffer, buffer, get_signing_key());
 119 }
 120
 121 static const char tag_template[] =
 122         N_("\nWrite a message for tag:\n  %s\n"
 123         "Lines starting with '%c' will be ignored.\n");
 124
 125 static const char tag_template_nocleanup[] =
 126         N_("\nWrite a message for tag:\n  %s\n"
 127         "Lines starting with '%c' will be kept; you may remove them"
 128         " yourself if you want to.\n");
 129
 130 /* Parse arg given and add it the ref_sorting array */
 131 static int parse_sorting_string(const char *arg, struct ref_sorting **sorting_tail)
 132 {
 133         struct ref_sorting *s;
 134         int len;
 135
 136         s = xcalloc(1, sizeof(*s));
 137         s->next = *sorting_tail;
 138         *sorting_tail = s;
 139
 140         if (*arg == '-') {
 141                 s->reverse = 1;
 142                 arg++;
 143         }
 144         if (skip_prefix(arg, "version:", &arg) ||
 145             skip_prefix(arg, "v:", &arg))
 146                 s->version = 1;
 147
 148         len = strlen(arg);
 149         s->atom = parse_ref_filter_atom(arg, arg+len);
 150
 151         return 0;
 152 }
 153
 154 static int git_tag_config(const char *var, const char *value, void *cb)
 155 {
 156         int status;
 157         struct ref_sorting **sorting_tail = (struct ref_sorting **)cb;
 158
 159         if (!strcmp(var, "tag.sort")) {
 160                 if (!value)
 161                         return config_error_nonbool(var);
 162                 parse_sorting_string(value, sorting_tail);
 163                 return 0;
 164         }
 165
 166         status = git_gpg_config(var, value, cb);
 167         if (status)
 168                 return status;
 169         if (starts_with(var, "column."))
 170                 return git_column_config(var, value, "tag", &colopts);
 171         return git_default_config(var, value, cb);
 172 }
 173
 174 static void write_tag_body(int fd, const unsigned char *sha1)
 175 {
 176         unsigned long size;
 177         enum object_type type;
 178         char *buf, *sp;
 179
 180         buf = read_sha1_file(sha1, &type, &size);
 181         if (!buf)
 182                 return;
 183         /* skip header */
 184         sp = strstr(buf, "\n\n");
 185
 186         if (!sp || !size || type != OBJ_TAG) {
 187                 free(buf);
 188                 return;
 189         }
 190         sp += 2; /* skip the 2 LFs */
 191         write_or_die(fd, sp, parse_signature(sp, buf + size - sp));
 192
 193         free(buf);
 194 }
 195
 196 static int build_tag_object(struct strbuf *buf, int sign, unsigned char *result)
 197 {
 198         if (sign && do_sign(buf) < 0)
 199                 return error(_("unable to sign the tag"));
 200         if (write_sha1_file(buf->buf, buf->len, tag_type, result) < 0)
 201                 return error(_("unable to write tag file"));
 202         return 0;
 203 }
 204
 205 struct create_tag_options {
 206         unsigned int message_given:1;
 207         unsigned int sign;
 208         enum {
 209                 CLEANUP_NONE,
 210                 CLEANUP_SPACE,
 211                 CLEANUP_ALL
 212         } cleanup_mode;
 213 };
 214
 215 static void create_tag(const unsigned char *object, const char *tag,
 216                        struct strbuf *buf, struct create_tag_options *opt,
 217                        unsigned char *prev, unsigned char *result)
 218 {
 219         enum object_type type;
 220         char header_buf[1024];
 221         int header_len;
 222         char *path = NULL;
 223
 224         type = sha1_object_info(object, NULL);
 225         if (type <= OBJ_NONE)
 226             die(_("bad object type."));
 227
 228         header_len = snprintf(header_buf, sizeof(header_buf),
 229                           "object %s\n"
 230                           "type %s\n"
 231                           "tag %s\n"
 232                           "tagger %s\n\n",
 233                           sha1_to_hex(object),
 234                           typename(type),
 235                           tag,
 236                           git_committer_info(IDENT_STRICT));
 237
 238         if (header_len > sizeof(header_buf) - 1)
 239                 die(_("tag header too big."));
 240
 241         if (!opt->message_given) {
 242                 int fd;
 243
 244                 /* write the template message before editing: */
 245                 path = git_pathdup("TAG_EDITMSG");
 246                 fd = open(path, O_CREAT | O_TRUNC | O_WRONLY, 0600);
 247                 if (fd < 0)
 248                         die_errno(_("could not create file '%s'"), path);
 249
 250                 if (!is_null_sha1(prev)) {
 251                         write_tag_body(fd, prev);
 252                 } else {
 253                         struct strbuf buf = STRBUF_INIT;
 254                         strbuf_addch(&buf, '\n');
 255                         if (opt->cleanup_mode == CLEANUP_ALL)
 256                                 strbuf_commented_addf(&buf, _(tag_template), tag, comment_line_char);
 257                         else
 258                                 strbuf_commented_addf(&buf, _(tag_template_nocleanup), tag, comment_line_char);
 259                         write_or_die(fd, buf.buf, buf.len);
 260                         strbuf_release(&buf);
 261                 }
 262                 close(fd);
 263
 264                 if (launch_editor(path, buf, NULL)) {
 265                         fprintf(stderr,
 266                         _("Please supply the message using either -m or -F option.\n"));
 267                         exit(1);
 268                 }
 269         }
 270
 271         if (opt->cleanup_mode != CLEANUP_NONE)
 272                 strbuf_stripspace(buf, opt->cleanup_mode == CLEANUP_ALL);
 273
 274         if (!opt->message_given && !buf->len)
 275                 die(_("no tag message?"));
 276
 277         strbuf_insert(buf, 0, header_buf, header_len);
 278
 279         if (build_tag_object(buf, opt->sign, result) < 0) {
 280                 if (path)
 281                         fprintf(stderr, _("The tag message has been left in %s\n"),
 282                                 path);
 283                 exit(128);
 284         }
 285         if (path) {
 286                 unlink_or_warn(path);
 287                 free(path);
 288         }
 289 }
 290
 291 struct msg_arg {
 292         int given;
 293         struct strbuf buf;
 294 };
 295
 296 static int parse_msg_arg(const struct option *opt, const char *arg, int unset)
 297 {
 298         struct msg_arg *msg = opt->value;
 299
 300         if (!arg)
 301                 return -1;
 302         if (msg->buf.len)
 303                 strbuf_addstr(&(msg->buf), "\n\n");
 304         strbuf_addstr(&(msg->buf), arg);
 305         msg->given = 1;
 306         return 0;
 307 }
 308
 309 static int strbuf_check_tag_ref(struct strbuf *sb, const char *name)
 310 {
 311         if (name[0] == '-')
 312                 return -1;
 313
 314         strbuf_reset(sb);
 315         strbuf_addf(sb, "refs/tags/%s", name);
 316
 317         return check_refname_format(sb->buf, 0);
 318 }
 319
 320 int cmd_tag(int argc, const char **argv, const char *prefix)
 321 {
 322         struct strbuf buf = STRBUF_INIT;
 323         struct strbuf ref = STRBUF_INIT;
 324         unsigned char object[20], prev[20];
 325         const char *object_ref, *tag;
 326         struct create_tag_options opt;
 327         char *cleanup_arg = NULL;
 328         int create_reflog = 0;
 329         int annotate = 0, force = 0;
 330         int cmdmode = 0;
 331         const char *msgfile = NULL, *keyid = NULL;
 332         struct msg_arg msg = { 0, STRBUF_INIT };
 333         struct ref_transaction *transaction;
 334         struct strbuf err = STRBUF_INIT;
 335         struct ref_filter filter;
 336         static struct ref_sorting *sorting = NULL, **sorting_tail = &sorting;
 337         const char *format = NULL;
 338         struct option options[] = {
 339                 OPT_CMDMODE('l', "list", &cmdmode, N_("list tag names"), 'l'),
 340                 { OPTION_INTEGER, 'n', NULL, &filter.lines, N_("n"),
 341                                 N_("print <n> lines of each tag message"),
 342                                 PARSE_OPT_OPTARG, NULL, 1 },
 343                 OPT_CMDMODE('d', "delete", &cmdmode, N_("delete tags"), 'd'),
 344                 OPT_CMDMODE('v', "verify", &cmdmode, N_("verify tags"), 'v'),
 345
 346                 OPT_GROUP(N_("Tag creation options")),
 347                 OPT_BOOL('a', "annotate", &annotate,
 348                                         N_("annotated tag, needs a message")),
 349                 OPT_CALLBACK('m', "message", &msg, N_("message"),
 350                              N_("tag message"), parse_msg_arg),
 351                 OPT_FILENAME('F', "file", &msgfile, N_("read message from file")),
 352                 OPT_BOOL('s', "sign", &opt.sign, N_("annotated and GPG-signed tag")),
 353                 OPT_STRING(0, "cleanup", &cleanup_arg, N_("mode"),
 354                         N_("how to strip spaces and #comments from message")),
 355                 OPT_STRING('u', "local-user", &keyid, N_("key-id"),
 356                                         N_("use another key to sign the tag")),
 357                 OPT__FORCE(&force, N_("replace the tag if exists")),
 358                 OPT_BOOL(0, "create-reflog", &create_reflog, N_("create a reflog")),
 359
 360                 OPT_GROUP(N_("Tag listing options")),
 361                 OPT_COLUMN(0, "column", &colopts, N_("show tag list in columns")),
 362                 OPT_CONTAINS(&filter.with_commit, N_("print only tags that contain the commit")),
 363                 OPT_WITH(&filter.with_commit, N_("print only tags that contain the commit")),
 364                 OPT_MERGED(&filter, N_("print only tags that are merged")),
 365                 OPT_NO_MERGED(&filter, N_("print only tags that are not merged")),
 366                 OPT_CALLBACK(0 , "sort", sorting_tail, N_("key"),
 367                              N_("field name to sort on"), &parse_opt_ref_sorting),
 368                 {
 369                         OPTION_CALLBACK, 0, "points-at", &filter.points_at, N_("object"),
 370                         N_("print only tags of the object"), 0, parse_opt_object_name
 371                 },
 372                 OPT_STRING(  0 , "format", &format, N_("format"), N_("format to use for the output")),
 373                 OPT_END()
 374         };
 375
 376         git_config(git_tag_config, sorting_tail);
 377
 378         memset(&opt, 0, sizeof(opt));
 379         memset(&filter, 0, sizeof(filter));
 380         filter.lines = -1;
 381
 382         argc = parse_options(argc, argv, prefix, options, git_tag_usage, 0);
 383
 384         if (keyid) {
 385                 opt.sign = 1;
 386                 set_signing_key(keyid);
 387         }
 388         if (opt.sign)
 389                 annotate = 1;
 390         if (argc == 0 && !cmdmode)
 391                 cmdmode = 'l';
 392
 393         if ((annotate || msg.given || msgfile || force) && (cmdmode != 0))
 394                 usage_with_options(git_tag_usage, options);
 395
 396         finalize_colopts(&colopts, -1);
 397         if (cmdmode == 'l' && filter.lines != -1) {
 398                 if (explicitly_enable_column(colopts))
 399                         die(_("--column and -n are incompatible"));
 400                 colopts = 0;
 401         }
 402         if (!sorting)
 403                 sorting = ref_default_sorting();
 404         if (cmdmode == 'l') {
 405                 int ret;
 406                 if (column_active(colopts)) {
 407                         struct column_options copts;
 408                         memset(&copts, 0, sizeof(copts));
 409                         copts.padding = 2;
 410                         run_column_filter(colopts, &copts);
 411                 }
 412                 filter.name_patterns = argv;
 413                 ret = list_tags(&filter, sorting, format);
 414                 if (column_active(colopts))
 415                         stop_column_filter();
 416                 return ret;
 417         }
 418         if (filter.lines != -1)
 419                 die(_("-n option is only allowed with -l."));
 420         if (filter.with_commit)
 421                 die(_("--contains option is only allowed with -l."));
 422         if (filter.points_at.nr)
 423                 die(_("--points-at option is only allowed with -l."));
 424         if (filter.merge_commit)
 425                 die(_("--merged and --no-merged option are only allowed with -l"));
 426         if (cmdmode == 'd')
 427                 return for_each_tag_name(argv, delete_tag);
 428         if (cmdmode == 'v')
 429                 return for_each_tag_name(argv, verify_tag);
 430
 431         if (msg.given || msgfile) {
 432                 if (msg.given && msgfile)
 433                         die(_("only one -F or -m option is allowed."));
 434                 annotate = 1;
 435                 if (msg.given)
 436                         strbuf_addbuf(&buf, &(msg.buf));
 437                 else {
 438                         if (!strcmp(msgfile, "-")) {
 439                                 if (strbuf_read(&buf, 0, 1024) < 0)
 440                                         die_errno(_("cannot read '%s'"), msgfile);
 441                         } else {
 442                                 if (strbuf_read_file(&buf, msgfile, 1024) < 0)
 443                                         die_errno(_("could not open or read '%s'"),
 444                                                 msgfile);
 445                         }
 446                 }
 447         }
 448
 449         tag = argv[0];
 450
 451         object_ref = argc == 2 ? argv[1] : "HEAD";
 452         if (argc > 2)
 453                 die(_("too many params"));
 454
 455         if (get_sha1(object_ref, object))
 456                 die(_("Failed to resolve '%s' as a valid ref."), object_ref);
 457
 458         if (strbuf_check_tag_ref(&ref, tag))
 459                 die(_("'%s' is not a valid tag name."), tag);
 460
 461         if (read_ref(ref.buf, prev))
 462                 hashclr(prev);
 463         else if (!force)
 464                 die(_("tag '%s' already exists"), tag);
 465
 466         opt.message_given = msg.given || msgfile;
 467
 468         if (!cleanup_arg || !strcmp(cleanup_arg, "strip"))
 469                 opt.cleanup_mode = CLEANUP_ALL;
 470         else if (!strcmp(cleanup_arg, "verbatim"))
 471                 opt.cleanup_mode = CLEANUP_NONE;
 472         else if (!strcmp(cleanup_arg, "whitespace"))
 473                 opt.cleanup_mode = CLEANUP_SPACE;
 474         else
 475                 die(_("Invalid cleanup mode %s"), cleanup_arg);
 476
 477         if (annotate)
 478                 create_tag(object, tag, &buf, &opt, prev, object);
 479
 480         transaction = ref_transaction_begin(&err);
 481         if (!transaction ||
 482             ref_transaction_update(transaction, ref.buf, object, prev,
 483                                    create_reflog ? REF_FORCE_CREATE_REFLOG : 0,
 484                                    NULL, &err) ||
 485             ref_transaction_commit(transaction, &err))
 486                 die("%s", err.buf);
 487         ref_transaction_free(transaction);
 488         if (force && !is_null_sha1(prev) && hashcmp(prev, object))
 489                 printf(_("Updated tag '%s' (was %s)\n"), tag, find_unique_abbrev(prev, DEFAULT_ABBREV));
 490
 491         strbuf_release(&err);
 492         strbuf_release(&buf);
 493         strbuf_release(&ref);
 494         return 0;
 495 }