Andrew's git / gitweb.git / builtin/tag.c
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builtin / tag.con commit Merge branch 'rs/get-tagged-oid' (cf861cd)
   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;
  36static int config_sign_tag = -1; /* unspecified */
  37
  38static 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
  74typedef int (*each_tag_name_fn)(const char *name, const char *ref,
  75                                const struct object_id *oid, const void *cb_data);
  76
  77static 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
 100static 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
 110static 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
 129static int do_sign(struct strbuf *buffer)
 130{
 131        return sign_buffer(buffer, buffer, get_signing_key());
 132}
 133
 134static const char tag_template[] =
 135        N_("\nWrite a message for tag:\n  %s\n"
 136        "Lines starting with '%c' will be ignored.\n");
 137
 138static 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
 143static 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
 173static 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;
 178
 179        buf = read_object_file(oid, &type, &size);
 180        if (!buf)
 181                return;
 182        /* skip header */
 183        sp = strstr(buf, "\n\n");
 184
 185        if (!sp || !size || type != OBJ_TAG) {
 186                free(buf);
 187                return;
 188        }
 189        sp += 2; /* skip the 2 LFs */
 190        write_or_die(fd, sp, parse_signature(sp, buf + size - sp));
 191
 192        free(buf);
 193}
 194
 195static int build_tag_object(struct strbuf *buf, int sign, struct object_id *result)
 196{
 197        if (sign && do_sign(buf) < 0)
 198                return error(_("unable to sign the tag"));
 199        if (write_object_file(buf->buf, buf->len, tag_type, result) < 0)
 200                return error(_("unable to write tag file"));
 201        return 0;
 202}
 203
 204struct create_tag_options {
 205        unsigned int message_given:1;
 206        unsigned int use_editor:1;
 207        unsigned int sign;
 208        enum {
 209                CLEANUP_NONE,
 210                CLEANUP_SPACE,
 211                CLEANUP_ALL
 212        } cleanup_mode;
 213};
 214
 215static const char message_advice_nested_tag[] =
 216        N_("You have created a nested tag. The object referred to by your new tag is\n"
 217           "already a tag. If you meant to tag the object that it points to, use:\n"
 218           "\n"
 219           "\tgit tag -f %s %s^{}");
 220
 221static void create_tag(const struct object_id *object, const char *object_ref,
 222                       const char *tag,
 223                       struct strbuf *buf, struct create_tag_options *opt,
 224                       struct object_id *prev, struct object_id *result)
 225{
 226        enum object_type type;
 227        struct strbuf header = STRBUF_INIT;
 228        char *path = NULL;
 229
 230        type = oid_object_info(the_repository, object, NULL);
 231        if (type <= OBJ_NONE)
 232                die(_("bad object type."));
 233
 234        if (type == OBJ_TAG && advice_nested_tag)
 235                advise(_(message_advice_nested_tag), tag, object_ref);
 236
 237        strbuf_addf(&header,
 238                    "object %s\n"
 239                    "type %s\n"
 240                    "tag %s\n"
 241                    "tagger %s\n\n",
 242                    oid_to_hex(object),
 243                    type_name(type),
 244                    tag,
 245                    git_committer_info(IDENT_STRICT));
 246
 247        if (!opt->message_given || opt->use_editor) {
 248                int fd;
 249
 250                /* write the template message before editing: */
 251                path = git_pathdup("TAG_EDITMSG");
 252                fd = open(path, O_CREAT | O_TRUNC | O_WRONLY, 0600);
 253                if (fd < 0)
 254                        die_errno(_("could not create file '%s'"), path);
 255
 256                if (opt->message_given) {
 257                        write_or_die(fd, buf->buf, buf->len);
 258                        strbuf_reset(buf);
 259                } else if (!is_null_oid(prev)) {
 260                        write_tag_body(fd, prev);
 261                } else {
 262                        struct strbuf buf = STRBUF_INIT;
 263                        strbuf_addch(&buf, '\n');
 264                        if (opt->cleanup_mode == CLEANUP_ALL)
 265                                strbuf_commented_addf(&buf, _(tag_template), tag, comment_line_char);
 266                        else
 267                                strbuf_commented_addf(&buf, _(tag_template_nocleanup), tag, comment_line_char);
 268                        write_or_die(fd, buf.buf, buf.len);
 269                        strbuf_release(&buf);
 270                }
 271                close(fd);
 272
 273                if (launch_editor(path, buf, NULL)) {
 274                        fprintf(stderr,
 275                        _("Please supply the message using either -m or -F option.\n"));
 276                        exit(1);
 277                }
 278        }
 279
 280        if (opt->cleanup_mode != CLEANUP_NONE)
 281                strbuf_stripspace(buf, opt->cleanup_mode == CLEANUP_ALL);
 282
 283        if (!opt->message_given && !buf->len)
 284                die(_("no tag message?"));
 285
 286        strbuf_insert(buf, 0, header.buf, header.len);
 287        strbuf_release(&header);
 288
 289        if (build_tag_object(buf, opt->sign, result) < 0) {
 290                if (path)
 291                        fprintf(stderr, _("The tag message has been left in %s\n"),
 292                                path);
 293                exit(128);
 294        }
 295        if (path) {
 296                unlink_or_warn(path);
 297                free(path);
 298        }
 299}
 300
 301static void create_reflog_msg(const struct object_id *oid, struct strbuf *sb)
 302{
 303        enum object_type type;
 304        struct commit *c;
 305        char *buf;
 306        unsigned long size;
 307        int subject_len = 0;
 308        const char *subject_start;
 309
 310        char *rla = getenv("GIT_REFLOG_ACTION");
 311        if (rla) {
 312                strbuf_addstr(sb, rla);
 313        } else {
 314                strbuf_addstr(sb, "tag: tagging ");
 315                strbuf_add_unique_abbrev(sb, oid, DEFAULT_ABBREV);
 316        }
 317
 318        strbuf_addstr(sb, " (");
 319        type = oid_object_info(the_repository, oid, NULL);
 320        switch (type) {
 321        default:
 322                strbuf_addstr(sb, "object of unknown type");
 323                break;
 324        case OBJ_COMMIT:
 325                if ((buf = read_object_file(oid, &type, &size)) != NULL) {
 326                        subject_len = find_commit_subject(buf, &subject_start);
 327                        strbuf_insert(sb, sb->len, subject_start, subject_len);
 328                } else {
 329                        strbuf_addstr(sb, "commit object");
 330                }
 331                free(buf);
 332
 333                if ((c = lookup_commit_reference(the_repository, oid)) != NULL)
 334                        strbuf_addf(sb, ", %s", show_date(c->date, 0, DATE_MODE(SHORT)));
 335                break;
 336        case OBJ_TREE:
 337                strbuf_addstr(sb, "tree object");
 338                break;
 339        case OBJ_BLOB:
 340                strbuf_addstr(sb, "blob object");
 341                break;
 342        case OBJ_TAG:
 343                strbuf_addstr(sb, "other tag object");
 344                break;
 345        }
 346        strbuf_addch(sb, ')');
 347}
 348
 349struct msg_arg {
 350        int given;
 351        struct strbuf buf;
 352};
 353
 354static int parse_msg_arg(const struct option *opt, const char *arg, int unset)
 355{
 356        struct msg_arg *msg = opt->value;
 357
 358        BUG_ON_OPT_NEG(unset);
 359
 360        if (!arg)
 361                return -1;
 362        if (msg->buf.len)
 363                strbuf_addstr(&(msg->buf), "\n\n");
 364        strbuf_addstr(&(msg->buf), arg);
 365        msg->given = 1;
 366        return 0;
 367}
 368
 369static int strbuf_check_tag_ref(struct strbuf *sb, const char *name)
 370{
 371        if (name[0] == '-')
 372                return -1;
 373
 374        strbuf_reset(sb);
 375        strbuf_addf(sb, "refs/tags/%s", name);
 376
 377        return check_refname_format(sb->buf, 0);
 378}
 379
 380int cmd_tag(int argc, const char **argv, const char *prefix)
 381{
 382        struct strbuf buf = STRBUF_INIT;
 383        struct strbuf ref = STRBUF_INIT;
 384        struct strbuf reflog_msg = STRBUF_INIT;
 385        struct object_id object, prev;
 386        const char *object_ref, *tag;
 387        struct create_tag_options opt;
 388        char *cleanup_arg = NULL;
 389        int create_reflog = 0;
 390        int annotate = 0, force = 0;
 391        int cmdmode = 0, create_tag_object = 0;
 392        const char *msgfile = NULL, *keyid = NULL;
 393        struct msg_arg msg = { 0, STRBUF_INIT };
 394        struct ref_transaction *transaction;
 395        struct strbuf err = STRBUF_INIT;
 396        struct ref_filter filter;
 397        static struct ref_sorting *sorting = NULL, **sorting_tail = &sorting;
 398        struct ref_format format = REF_FORMAT_INIT;
 399        int icase = 0;
 400        int edit_flag = 0;
 401        struct option options[] = {
 402                OPT_CMDMODE('l', "list", &cmdmode, N_("list tag names"), 'l'),
 403                { OPTION_INTEGER, 'n', NULL, &filter.lines, N_("n"),
 404                                N_("print <n> lines of each tag message"),
 405                                PARSE_OPT_OPTARG, NULL, 1 },
 406                OPT_CMDMODE('d', "delete", &cmdmode, N_("delete tags"), 'd'),
 407                OPT_CMDMODE('v', "verify", &cmdmode, N_("verify tags"), 'v'),
 408
 409                OPT_GROUP(N_("Tag creation options")),
 410                OPT_BOOL('a', "annotate", &annotate,
 411                                        N_("annotated tag, needs a message")),
 412                { OPTION_CALLBACK, 'm', "message", &msg, N_("message"),
 413                  N_("tag message"), PARSE_OPT_NONEG, parse_msg_arg },
 414                OPT_FILENAME('F', "file", &msgfile, N_("read message from file")),
 415                OPT_BOOL('e', "edit", &edit_flag, N_("force edit of tag message")),
 416                OPT_BOOL('s', "sign", &opt.sign, N_("annotated and GPG-signed tag")),
 417                OPT_CLEANUP(&cleanup_arg),
 418                OPT_STRING('u', "local-user", &keyid, N_("key-id"),
 419                                        N_("use another key to sign the tag")),
 420                OPT__FORCE(&force, N_("replace the tag if exists"), 0),
 421                OPT_BOOL(0, "create-reflog", &create_reflog, N_("create a reflog")),
 422
 423                OPT_GROUP(N_("Tag listing options")),
 424                OPT_COLUMN(0, "column", &colopts, N_("show tag list in columns")),
 425                OPT_CONTAINS(&filter.with_commit, N_("print only tags that contain the commit")),
 426                OPT_NO_CONTAINS(&filter.no_commit, N_("print only tags that don't contain the commit")),
 427                OPT_WITH(&filter.with_commit, N_("print only tags that contain the commit")),
 428                OPT_WITHOUT(&filter.no_commit, N_("print only tags that don't contain the commit")),
 429                OPT_MERGED(&filter, N_("print only tags that are merged")),
 430                OPT_NO_MERGED(&filter, N_("print only tags that are not merged")),
 431                OPT_REF_SORT(sorting_tail),
 432                {
 433                        OPTION_CALLBACK, 0, "points-at", &filter.points_at, N_("object"),
 434                        N_("print only tags of the object"), PARSE_OPT_LASTARG_DEFAULT,
 435                        parse_opt_object_name, (intptr_t) "HEAD"
 436                },
 437                OPT_STRING(  0 , "format", &format.format, N_("format"),
 438                           N_("format to use for the output")),
 439                OPT__COLOR(&format.use_color, N_("respect format colors")),
 440                OPT_BOOL('i', "ignore-case", &icase, N_("sorting and filtering are case insensitive")),
 441                OPT_END()
 442        };
 443
 444        setup_ref_filter_porcelain_msg();
 445
 446        git_config(git_tag_config, sorting_tail);
 447
 448        memset(&opt, 0, sizeof(opt));
 449        memset(&filter, 0, sizeof(filter));
 450        filter.lines = -1;
 451        opt.sign = -1;
 452
 453        argc = parse_options(argc, argv, prefix, options, git_tag_usage, 0);
 454
 455        if (!cmdmode) {
 456                if (argc == 0)
 457                        cmdmode = 'l';
 458                else if (filter.with_commit || filter.no_commit ||
 459                         filter.points_at.nr || filter.merge_commit ||
 460                         filter.lines != -1)
 461                        cmdmode = 'l';
 462        }
 463
 464        if (cmdmode == 'l')
 465                setup_auto_pager("tag", 1);
 466
 467        if (opt.sign == -1)
 468                opt.sign = cmdmode ? 0 : config_sign_tag > 0;
 469
 470        if (keyid) {
 471                opt.sign = 1;
 472                set_signing_key(keyid);
 473        }
 474        create_tag_object = (opt.sign || annotate || msg.given || msgfile);
 475
 476        if ((create_tag_object || force) && (cmdmode != 0))
 477                usage_with_options(git_tag_usage, options);
 478
 479        finalize_colopts(&colopts, -1);
 480        if (cmdmode == 'l' && filter.lines != -1) {
 481                if (explicitly_enable_column(colopts))
 482                        die(_("--column and -n are incompatible"));
 483                colopts = 0;
 484        }
 485        if (!sorting)
 486                sorting = ref_default_sorting();
 487        sorting->ignore_case = icase;
 488        filter.ignore_case = icase;
 489        if (cmdmode == 'l') {
 490                int ret;
 491                if (column_active(colopts)) {
 492                        struct column_options copts;
 493                        memset(&copts, 0, sizeof(copts));
 494                        copts.padding = 2;
 495                        run_column_filter(colopts, &copts);
 496                }
 497                filter.name_patterns = argv;
 498                ret = list_tags(&filter, sorting, &format);
 499                if (column_active(colopts))
 500                        stop_column_filter();
 501                return ret;
 502        }
 503        if (filter.lines != -1)
 504                die(_("-n option is only allowed in list mode"));
 505        if (filter.with_commit)
 506                die(_("--contains option is only allowed in list mode"));
 507        if (filter.no_commit)
 508                die(_("--no-contains option is only allowed in list mode"));
 509        if (filter.points_at.nr)
 510                die(_("--points-at option is only allowed in list mode"));
 511        if (filter.merge_commit)
 512                die(_("--merged and --no-merged options are only allowed in list mode"));
 513        if (cmdmode == 'd')
 514                return for_each_tag_name(argv, delete_tag, NULL);
 515        if (cmdmode == 'v') {
 516                if (format.format && verify_ref_format(&format))
 517                        usage_with_options(git_tag_usage, options);
 518                return for_each_tag_name(argv, verify_tag, &format);
 519        }
 520
 521        if (msg.given || msgfile) {
 522                if (msg.given && msgfile)
 523                        die(_("only one -F or -m option is allowed."));
 524                if (msg.given)
 525                        strbuf_addbuf(&buf, &(msg.buf));
 526                else {
 527                        if (!strcmp(msgfile, "-")) {
 528                                if (strbuf_read(&buf, 0, 1024) < 0)
 529                                        die_errno(_("cannot read '%s'"), msgfile);
 530                        } else {
 531                                if (strbuf_read_file(&buf, msgfile, 1024) < 0)
 532                                        die_errno(_("could not open or read '%s'"),
 533                                                msgfile);
 534                        }
 535                }
 536        }
 537
 538        tag = argv[0];
 539
 540        object_ref = argc == 2 ? argv[1] : "HEAD";
 541        if (argc > 2)
 542                die(_("too many params"));
 543
 544        if (get_oid(object_ref, &object))
 545                die(_("Failed to resolve '%s' as a valid ref."), object_ref);
 546
 547        if (strbuf_check_tag_ref(&ref, tag))
 548                die(_("'%s' is not a valid tag name."), tag);
 549
 550        if (read_ref(ref.buf, &prev))
 551                oidclr(&prev);
 552        else if (!force)
 553                die(_("tag '%s' already exists"), tag);
 554
 555        opt.message_given = msg.given || msgfile;
 556        opt.use_editor = edit_flag;
 557
 558        if (!cleanup_arg || !strcmp(cleanup_arg, "strip"))
 559                opt.cleanup_mode = CLEANUP_ALL;
 560        else if (!strcmp(cleanup_arg, "verbatim"))
 561                opt.cleanup_mode = CLEANUP_NONE;
 562        else if (!strcmp(cleanup_arg, "whitespace"))
 563                opt.cleanup_mode = CLEANUP_SPACE;
 564        else
 565                die(_("Invalid cleanup mode %s"), cleanup_arg);
 566
 567        create_reflog_msg(&object, &reflog_msg);
 568
 569        if (create_tag_object) {
 570                if (force_sign_annotate && !annotate)
 571                        opt.sign = 1;
 572                create_tag(&object, object_ref, tag, &buf, &opt, &prev, &object);
 573        }
 574
 575        transaction = ref_transaction_begin(&err);
 576        if (!transaction ||
 577            ref_transaction_update(transaction, ref.buf, &object, &prev,
 578                                   create_reflog ? REF_FORCE_CREATE_REFLOG : 0,
 579                                   reflog_msg.buf, &err) ||
 580            ref_transaction_commit(transaction, &err))
 581                die("%s", err.buf);
 582        ref_transaction_free(transaction);
 583        if (force && !is_null_oid(&prev) && !oideq(&prev, &object))
 584                printf(_("Updated tag '%s' (was %s)\n"), tag,
 585                       find_unique_abbrev(&prev, DEFAULT_ABBREV));
 586
 587        UNLEAK(buf);
 588        UNLEAK(ref);
 589        UNLEAK(reflog_msg);
 590        UNLEAK(msg);
 591        UNLEAK(err);
 592        return 0;
 593}