Andrew's git / gitweb.git / builtin/tag.c
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builtin / tag.con commit tag: advise on nested tags (eea9c1e)
   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 "sha1-array.h"
  21#include "column.h"
  22#include "ref-filter.h"
  23
  24static 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>] [--[no-]merged [<commit>]] [<pattern>...]"),
  30        N_("git tag -v [--format=<format>] <tagname>..."),
  31        NULL
  32};
  33
  34static unsigned int colopts;
  35static int force_sign_annotate;
  36
  37static int list_tags(struct ref_filter *filter, struct ref_sorting *sorting,
  38                     struct ref_format *format)
  39{
  40        struct ref_array array;
  41        char *to_free = NULL;
  42        int i;
  43
  44        memset(&array, 0, sizeof(array));
  45
  46        if (filter->lines == -1)
  47                filter->lines = 0;
  48
  49        if (!format->format) {
  50                if (filter->lines) {
  51                        to_free = xstrfmt("%s %%(contents:lines=%d)",
  52                                          "%(align:15)%(refname:lstrip=2)%(end)",
  53                                          filter->lines);
  54                        format->format = to_free;
  55                } else
  56                        format->format = "%(refname:lstrip=2)";
  57        }
  58
  59        if (verify_ref_format(format))
  60                die(_("unable to parse format string"));
  61        filter->with_commit_tag_algo = 1;
  62        filter_refs(&array, filter, FILTER_REFS_TAGS);
  63        ref_array_sort(sorting, &array);
  64
  65        for (i = 0; i < array.nr; i++)
  66                show_ref_array_item(array.items[i], format);
  67        ref_array_clear(&array);
  68        free(to_free);
  69
  70        return 0;
  71}
  72
  73typedef int (*each_tag_name_fn)(const char *name, const char *ref,
  74                                const struct object_id *oid, const void *cb_data);
  75
  76static int for_each_tag_name(const char **argv, each_tag_name_fn fn,
  77                             const void *cb_data)
  78{
  79        const char **p;
  80        struct strbuf ref = STRBUF_INIT;
  81        int had_error = 0;
  82        struct object_id oid;
  83
  84        for (p = argv; *p; p++) {
  85                strbuf_reset(&ref);
  86                strbuf_addf(&ref, "refs/tags/%s", *p);
  87                if (read_ref(ref.buf, &oid)) {
  88                        error(_("tag '%s' not found."), *p);
  89                        had_error = 1;
  90                        continue;
  91                }
  92                if (fn(*p, ref.buf, &oid, cb_data))
  93                        had_error = 1;
  94        }
  95        strbuf_release(&ref);
  96        return had_error;
  97}
  98
  99static int delete_tag(const char *name, const char *ref,
 100                      const struct object_id *oid, const void *cb_data)
 101{
 102        if (delete_ref(NULL, ref, oid, 0))
 103                return 1;
 104        printf(_("Deleted tag '%s' (was %s)\n"), name,
 105               find_unique_abbrev(oid, DEFAULT_ABBREV));
 106        return 0;
 107}
 108
 109static int verify_tag(const char *name, const char *ref,
 110                      const struct object_id *oid, const void *cb_data)
 111{
 112        int flags;
 113        const struct ref_format *format = cb_data;
 114        flags = GPG_VERIFY_VERBOSE;
 115
 116        if (format->format)
 117                flags = GPG_VERIFY_OMIT_STATUS;
 118
 119        if (gpg_verify_tag(oid, name, flags))
 120                return -1;
 121
 122        if (format->format)
 123                pretty_print_ref(name, oid, format);
 124
 125        return 0;
 126}
 127
 128static int do_sign(struct strbuf *buffer)
 129{
 130        return sign_buffer(buffer, buffer, get_signing_key());
 131}
 132
 133static const char tag_template[] =
 134        N_("\nWrite a message for tag:\n  %s\n"
 135        "Lines starting with '%c' will be ignored.\n");
 136
 137static const char tag_template_nocleanup[] =
 138        N_("\nWrite a message for tag:\n  %s\n"
 139        "Lines starting with '%c' will be kept; you may remove them"
 140        " yourself if you want to.\n");
 141
 142static int git_tag_config(const char *var, const char *value, void *cb)
 143{
 144        int status;
 145        struct ref_sorting **sorting_tail = (struct ref_sorting **)cb;
 146
 147        if (!strcmp(var, "tag.sort")) {
 148                if (!value)
 149                        return config_error_nonbool(var);
 150                parse_ref_sorting(sorting_tail, value);
 151                return 0;
 152        }
 153
 154        status = git_gpg_config(var, value, cb);
 155        if (status)
 156                return status;
 157        if (!strcmp(var, "tag.forcesignannotated")) {
 158                force_sign_annotate = git_config_bool(var, value);
 159                return 0;
 160        }
 161
 162        if (starts_with(var, "column."))
 163                return git_column_config(var, value, "tag", &colopts);
 164        return git_color_default_config(var, value, cb);
 165}
 166
 167static void write_tag_body(int fd, const struct object_id *oid)
 168{
 169        unsigned long size;
 170        enum object_type type;
 171        char *buf, *sp;
 172
 173        buf = read_object_file(oid, &type, &size);
 174        if (!buf)
 175                return;
 176        /* skip header */
 177        sp = strstr(buf, "\n\n");
 178
 179        if (!sp || !size || type != OBJ_TAG) {
 180                free(buf);
 181                return;
 182        }
 183        sp += 2; /* skip the 2 LFs */
 184        write_or_die(fd, sp, parse_signature(sp, buf + size - sp));
 185
 186        free(buf);
 187}
 188
 189static int build_tag_object(struct strbuf *buf, int sign, struct object_id *result)
 190{
 191        if (sign && do_sign(buf) < 0)
 192                return error(_("unable to sign the tag"));
 193        if (write_object_file(buf->buf, buf->len, tag_type, result) < 0)
 194                return error(_("unable to write tag file"));
 195        return 0;
 196}
 197
 198struct create_tag_options {
 199        unsigned int message_given:1;
 200        unsigned int use_editor:1;
 201        unsigned int sign;
 202        enum {
 203                CLEANUP_NONE,
 204                CLEANUP_SPACE,
 205                CLEANUP_ALL
 206        } cleanup_mode;
 207};
 208
 209static const char message_advice_nested_tag[] =
 210        N_("You have created a nested tag. The object referred to by your new is\n"
 211           "already a tag. If you meant to tag the object that it points to, use:\n"
 212           "\n"
 213           "\tgit tag -f %s %s^{}");
 214
 215static void create_tag(const struct object_id *object, const char *object_ref,
 216                       const char *tag,
 217                       struct strbuf *buf, struct create_tag_options *opt,
 218                       struct object_id *prev, struct object_id *result)
 219{
 220        enum object_type type;
 221        struct strbuf header = STRBUF_INIT;
 222        char *path = NULL;
 223
 224        type = oid_object_info(the_repository, object, NULL);
 225        if (type <= OBJ_NONE)
 226                die(_("bad object type."));
 227
 228        if (type == OBJ_TAG && advice_nested_tag)
 229                advise(_(message_advice_nested_tag), tag, object_ref);
 230
 231        strbuf_addf(&header,
 232                    "object %s\n"
 233                    "type %s\n"
 234                    "tag %s\n"
 235                    "tagger %s\n\n",
 236                    oid_to_hex(object),
 237                    type_name(type),
 238                    tag,
 239                    git_committer_info(IDENT_STRICT));
 240
 241        if (!opt->message_given || opt->use_editor) {
 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 (opt->message_given) {
 251                        write_or_die(fd, buf->buf, buf->len);
 252                        strbuf_reset(buf);
 253                } else if (!is_null_oid(prev)) {
 254                        write_tag_body(fd, prev);
 255                } else {
 256                        struct strbuf buf = STRBUF_INIT;
 257                        strbuf_addch(&buf, '\n');
 258                        if (opt->cleanup_mode == CLEANUP_ALL)
 259                                strbuf_commented_addf(&buf, _(tag_template), tag, comment_line_char);
 260                        else
 261                                strbuf_commented_addf(&buf, _(tag_template_nocleanup), tag, comment_line_char);
 262                        write_or_die(fd, buf.buf, buf.len);
 263                        strbuf_release(&buf);
 264                }
 265                close(fd);
 266
 267                if (launch_editor(path, buf, NULL)) {
 268                        fprintf(stderr,
 269                        _("Please supply the message using either -m or -F option.\n"));
 270                        exit(1);
 271                }
 272        }
 273
 274        if (opt->cleanup_mode != CLEANUP_NONE)
 275                strbuf_stripspace(buf, opt->cleanup_mode == CLEANUP_ALL);
 276
 277        if (!opt->message_given && !buf->len)
 278                die(_("no tag message?"));
 279
 280        strbuf_insert(buf, 0, header.buf, header.len);
 281        strbuf_release(&header);
 282
 283        if (build_tag_object(buf, opt->sign, result) < 0) {
 284                if (path)
 285                        fprintf(stderr, _("The tag message has been left in %s\n"),
 286                                path);
 287                exit(128);
 288        }
 289        if (path) {
 290                unlink_or_warn(path);
 291                free(path);
 292        }
 293}
 294
 295static void create_reflog_msg(const struct object_id *oid, struct strbuf *sb)
 296{
 297        enum object_type type;
 298        struct commit *c;
 299        char *buf;
 300        unsigned long size;
 301        int subject_len = 0;
 302        const char *subject_start;
 303
 304        char *rla = getenv("GIT_REFLOG_ACTION");
 305        if (rla) {
 306                strbuf_addstr(sb, rla);
 307        } else {
 308                strbuf_addstr(sb, "tag: tagging ");
 309                strbuf_add_unique_abbrev(sb, oid, DEFAULT_ABBREV);
 310        }
 311
 312        strbuf_addstr(sb, " (");
 313        type = oid_object_info(the_repository, oid, NULL);
 314        switch (type) {
 315        default:
 316                strbuf_addstr(sb, "object of unknown type");
 317                break;
 318        case OBJ_COMMIT:
 319                if ((buf = read_object_file(oid, &type, &size)) != NULL) {
 320                        subject_len = find_commit_subject(buf, &subject_start);
 321                        strbuf_insert(sb, sb->len, subject_start, subject_len);
 322                } else {
 323                        strbuf_addstr(sb, "commit object");
 324                }
 325                free(buf);
 326
 327                if ((c = lookup_commit_reference(the_repository, oid)) != NULL)
 328                        strbuf_addf(sb, ", %s", show_date(c->date, 0, DATE_MODE(SHORT)));
 329                break;
 330        case OBJ_TREE:
 331                strbuf_addstr(sb, "tree object");
 332                break;
 333        case OBJ_BLOB:
 334                strbuf_addstr(sb, "blob object");
 335                break;
 336        case OBJ_TAG:
 337                strbuf_addstr(sb, "other tag object");
 338                break;
 339        }
 340        strbuf_addch(sb, ')');
 341}
 342
 343struct msg_arg {
 344        int given;
 345        struct strbuf buf;
 346};
 347
 348static int parse_msg_arg(const struct option *opt, const char *arg, int unset)
 349{
 350        struct msg_arg *msg = opt->value;
 351
 352        BUG_ON_OPT_NEG(unset);
 353
 354        if (!arg)
 355                return -1;
 356        if (msg->buf.len)
 357                strbuf_addstr(&(msg->buf), "\n\n");
 358        strbuf_addstr(&(msg->buf), arg);
 359        msg->given = 1;
 360        return 0;
 361}
 362
 363static int strbuf_check_tag_ref(struct strbuf *sb, const char *name)
 364{
 365        if (name[0] == '-')
 366                return -1;
 367
 368        strbuf_reset(sb);
 369        strbuf_addf(sb, "refs/tags/%s", name);
 370
 371        return check_refname_format(sb->buf, 0);
 372}
 373
 374int cmd_tag(int argc, const char **argv, const char *prefix)
 375{
 376        struct strbuf buf = STRBUF_INIT;
 377        struct strbuf ref = STRBUF_INIT;
 378        struct strbuf reflog_msg = STRBUF_INIT;
 379        struct object_id object, prev;
 380        const char *object_ref, *tag;
 381        struct create_tag_options opt;
 382        char *cleanup_arg = NULL;
 383        int create_reflog = 0;
 384        int annotate = 0, force = 0;
 385        int cmdmode = 0, create_tag_object = 0;
 386        const char *msgfile = NULL, *keyid = NULL;
 387        struct msg_arg msg = { 0, STRBUF_INIT };
 388        struct ref_transaction *transaction;
 389        struct strbuf err = STRBUF_INIT;
 390        struct ref_filter filter;
 391        static struct ref_sorting *sorting = NULL, **sorting_tail = &sorting;
 392        struct ref_format format = REF_FORMAT_INIT;
 393        int icase = 0;
 394        int edit_flag = 0;
 395        struct option options[] = {
 396                OPT_CMDMODE('l', "list", &cmdmode, N_("list tag names"), 'l'),
 397                { OPTION_INTEGER, 'n', NULL, &filter.lines, N_("n"),
 398                                N_("print <n> lines of each tag message"),
 399                                PARSE_OPT_OPTARG, NULL, 1 },
 400                OPT_CMDMODE('d', "delete", &cmdmode, N_("delete tags"), 'd'),
 401                OPT_CMDMODE('v', "verify", &cmdmode, N_("verify tags"), 'v'),
 402
 403                OPT_GROUP(N_("Tag creation options")),
 404                OPT_BOOL('a', "annotate", &annotate,
 405                                        N_("annotated tag, needs a message")),
 406                { OPTION_CALLBACK, 'm', "message", &msg, N_("message"),
 407                  N_("tag message"), PARSE_OPT_NONEG, parse_msg_arg },
 408                OPT_FILENAME('F', "file", &msgfile, N_("read message from file")),
 409                OPT_BOOL('e', "edit", &edit_flag, N_("force edit of tag message")),
 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"), 0),
 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.format, N_("format"),
 434                           N_("format to use for the output")),
 435                OPT__COLOR(&format.use_color, N_("respect format colors")),
 436                OPT_BOOL('i', "ignore-case", &icase, N_("sorting and filtering are case insensitive")),
 437                OPT_END()
 438        };
 439
 440        setup_ref_filter_porcelain_msg();
 441
 442        git_config(git_tag_config, sorting_tail);
 443
 444        memset(&opt, 0, sizeof(opt));
 445        memset(&filter, 0, sizeof(filter));
 446        filter.lines = -1;
 447
 448        argc = parse_options(argc, argv, prefix, options, git_tag_usage, 0);
 449
 450        if (keyid) {
 451                opt.sign = 1;
 452                set_signing_key(keyid);
 453        }
 454        create_tag_object = (opt.sign || annotate || msg.given || msgfile);
 455
 456        if (!cmdmode) {
 457                if (argc == 0)
 458                        cmdmode = 'l';
 459                else if (filter.with_commit || filter.no_commit ||
 460                         filter.points_at.nr || filter.merge_commit ||
 461                         filter.lines != -1)
 462                        cmdmode = 'l';
 463        }
 464
 465        if (cmdmode == 'l')
 466                setup_auto_pager("tag", 1);
 467
 468        if ((create_tag_object || force) && (cmdmode != 0))
 469                usage_with_options(git_tag_usage, options);
 470
 471        finalize_colopts(&colopts, -1);
 472        if (cmdmode == 'l' && filter.lines != -1) {
 473                if (explicitly_enable_column(colopts))
 474                        die(_("--column and -n are incompatible"));
 475                colopts = 0;
 476        }
 477        if (!sorting)
 478                sorting = ref_default_sorting();
 479        sorting->ignore_case = icase;
 480        filter.ignore_case = icase;
 481        if (cmdmode == 'l') {
 482                int ret;
 483                if (column_active(colopts)) {
 484                        struct column_options copts;
 485                        memset(&copts, 0, sizeof(copts));
 486                        copts.padding = 2;
 487                        run_column_filter(colopts, &copts);
 488                }
 489                filter.name_patterns = argv;
 490                ret = list_tags(&filter, sorting, &format);
 491                if (column_active(colopts))
 492                        stop_column_filter();
 493                return ret;
 494        }
 495        if (filter.lines != -1)
 496                die(_("-n option is only allowed in list mode"));
 497        if (filter.with_commit)
 498                die(_("--contains option is only allowed in list mode"));
 499        if (filter.no_commit)
 500                die(_("--no-contains option is only allowed in list mode"));
 501        if (filter.points_at.nr)
 502                die(_("--points-at option is only allowed in list mode"));
 503        if (filter.merge_commit)
 504                die(_("--merged and --no-merged options are only allowed in list mode"));
 505        if (cmdmode == 'd')
 506                return for_each_tag_name(argv, delete_tag, NULL);
 507        if (cmdmode == 'v') {
 508                if (format.format && verify_ref_format(&format))
 509                        usage_with_options(git_tag_usage, options);
 510                return for_each_tag_name(argv, verify_tag, &format);
 511        }
 512
 513        if (msg.given || msgfile) {
 514                if (msg.given && msgfile)
 515                        die(_("only one -F or -m option is allowed."));
 516                if (msg.given)
 517                        strbuf_addbuf(&buf, &(msg.buf));
 518                else {
 519                        if (!strcmp(msgfile, "-")) {
 520                                if (strbuf_read(&buf, 0, 1024) < 0)
 521                                        die_errno(_("cannot read '%s'"), msgfile);
 522                        } else {
 523                                if (strbuf_read_file(&buf, msgfile, 1024) < 0)
 524                                        die_errno(_("could not open or read '%s'"),
 525                                                msgfile);
 526                        }
 527                }
 528        }
 529
 530        tag = argv[0];
 531
 532        object_ref = argc == 2 ? argv[1] : "HEAD";
 533        if (argc > 2)
 534                die(_("too many params"));
 535
 536        if (get_oid(object_ref, &object))
 537                die(_("Failed to resolve '%s' as a valid ref."), object_ref);
 538
 539        if (strbuf_check_tag_ref(&ref, tag))
 540                die(_("'%s' is not a valid tag name."), tag);
 541
 542        if (read_ref(ref.buf, &prev))
 543                oidclr(&prev);
 544        else if (!force)
 545                die(_("tag '%s' already exists"), tag);
 546
 547        opt.message_given = msg.given || msgfile;
 548        opt.use_editor = edit_flag;
 549
 550        if (!cleanup_arg || !strcmp(cleanup_arg, "strip"))
 551                opt.cleanup_mode = CLEANUP_ALL;
 552        else if (!strcmp(cleanup_arg, "verbatim"))
 553                opt.cleanup_mode = CLEANUP_NONE;
 554        else if (!strcmp(cleanup_arg, "whitespace"))
 555                opt.cleanup_mode = CLEANUP_SPACE;
 556        else
 557                die(_("Invalid cleanup mode %s"), cleanup_arg);
 558
 559        create_reflog_msg(&object, &reflog_msg);
 560
 561        if (create_tag_object) {
 562                if (force_sign_annotate && !annotate)
 563                        opt.sign = 1;
 564                create_tag(&object, object_ref, tag, &buf, &opt, &prev, &object);
 565        }
 566
 567        transaction = ref_transaction_begin(&err);
 568        if (!transaction ||
 569            ref_transaction_update(transaction, ref.buf, &object, &prev,
 570                                   create_reflog ? REF_FORCE_CREATE_REFLOG : 0,
 571                                   reflog_msg.buf, &err) ||
 572            ref_transaction_commit(transaction, &err))
 573                die("%s", err.buf);
 574        ref_transaction_free(transaction);
 575        if (force && !is_null_oid(&prev) && !oideq(&prev, &object))
 576                printf(_("Updated tag '%s' (was %s)\n"), tag,
 577                       find_unique_abbrev(&prev, DEFAULT_ABBREV));
 578
 579        UNLEAK(buf);
 580        UNLEAK(ref);
 581        UNLEAK(reflog_msg);
 582        UNLEAK(msg);
 583        UNLEAK(err);
 584        return 0;
 585}