Andrew's git / gitweb.git / builtin/tag.c
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builtin / tag.con commit rebase: fix a memory leak (7372eae)
   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>] <tagname> [<head>]"),
  26        N_("git tag -d <tagname>..."),
  27        N_("git tag -l [-n[<num>]] [--contains <commit>] [--no-contains <commit>] [--points-at <object>]"
  28                "\n\t\t[--format=<format>] [--[no-]merged [<commit>]] [<pattern>...]"),
  29        N_("git tag -v [--format=<format>] <tagname>..."),
  30        NULL
  31};
  32
  33static unsigned int colopts;
  34static int force_sign_annotate;
  35
  36static int list_tags(struct ref_filter *filter, struct ref_sorting *sorting,
  37                     struct ref_format *format)
  38{
  39        struct ref_array array;
  40        char *to_free = NULL;
  41        int i;
  42
  43        memset(&array, 0, sizeof(array));
  44
  45        if (filter->lines == -1)
  46                filter->lines = 0;
  47
  48        if (!format->format) {
  49                if (filter->lines) {
  50                        to_free = xstrfmt("%s %%(contents:lines=%d)",
  51                                          "%(align:15)%(refname:lstrip=2)%(end)",
  52                                          filter->lines);
  53                        format->format = to_free;
  54                } else
  55                        format->format = "%(refname:lstrip=2)";
  56        }
  57
  58        if (verify_ref_format(format))
  59                die(_("unable to parse format string"));
  60        filter->with_commit_tag_algo = 1;
  61        filter_refs(&array, filter, FILTER_REFS_TAGS);
  62        ref_array_sort(sorting, &array);
  63
  64        for (i = 0; i < array.nr; i++)
  65                show_ref_array_item(array.items[i], format);
  66        ref_array_clear(&array);
  67        free(to_free);
  68
  69        return 0;
  70}
  71
  72typedef int (*each_tag_name_fn)(const char *name, const char *ref,
  73                                const struct object_id *oid, const void *cb_data);
  74
  75static int for_each_tag_name(const char **argv, each_tag_name_fn fn,
  76                             const void *cb_data)
  77{
  78        const char **p;
  79        struct strbuf ref = STRBUF_INIT;
  80        int had_error = 0;
  81        struct object_id oid;
  82
  83        for (p = argv; *p; p++) {
  84                strbuf_reset(&ref);
  85                strbuf_addf(&ref, "refs/tags/%s", *p);
  86                if (read_ref(ref.buf, &oid)) {
  87                        error(_("tag '%s' not found."), *p);
  88                        had_error = 1;
  89                        continue;
  90                }
  91                if (fn(*p, ref.buf, &oid, cb_data))
  92                        had_error = 1;
  93        }
  94        strbuf_release(&ref);
  95        return had_error;
  96}
  97
  98static int delete_tag(const char *name, const char *ref,
  99                      const struct object_id *oid, const void *cb_data)
 100{
 101        if (delete_ref(NULL, ref, oid, 0))
 102                return 1;
 103        printf(_("Deleted tag '%s' (was %s)\n"), name,
 104               find_unique_abbrev(oid, DEFAULT_ABBREV));
 105        return 0;
 106}
 107
 108static int verify_tag(const char *name, const char *ref,
 109                      const struct object_id *oid, const void *cb_data)
 110{
 111        int flags;
 112        const struct ref_format *format = cb_data;
 113        flags = GPG_VERIFY_VERBOSE;
 114
 115        if (format->format)
 116                flags = GPG_VERIFY_OMIT_STATUS;
 117
 118        if (gpg_verify_tag(oid, name, flags))
 119                return -1;
 120
 121        if (format->format)
 122                pretty_print_ref(name, oid, format);
 123
 124        return 0;
 125}
 126
 127static int do_sign(struct strbuf *buffer)
 128{
 129        return sign_buffer(buffer, buffer, get_signing_key());
 130}
 131
 132static const char tag_template[] =
 133        N_("\nWrite a message for tag:\n  %s\n"
 134        "Lines starting with '%c' will be ignored.\n");
 135
 136static const char tag_template_nocleanup[] =
 137        N_("\nWrite a message for tag:\n  %s\n"
 138        "Lines starting with '%c' will be kept; you may remove them"
 139        " yourself if you want to.\n");
 140
 141static int git_tag_config(const char *var, const char *value, void *cb)
 142{
 143        int status;
 144        struct ref_sorting **sorting_tail = (struct ref_sorting **)cb;
 145
 146        if (!strcmp(var, "tag.sort")) {
 147                if (!value)
 148                        return config_error_nonbool(var);
 149                parse_ref_sorting(sorting_tail, value);
 150                return 0;
 151        }
 152
 153        status = git_gpg_config(var, value, cb);
 154        if (status)
 155                return status;
 156        if (!strcmp(var, "tag.forcesignannotated")) {
 157                force_sign_annotate = git_config_bool(var, value);
 158                return 0;
 159        }
 160
 161        if (starts_with(var, "column."))
 162                return git_column_config(var, value, "tag", &colopts);
 163        return git_color_default_config(var, value, cb);
 164}
 165
 166static void write_tag_body(int fd, const struct object_id *oid)
 167{
 168        unsigned long size;
 169        enum object_type type;
 170        char *buf, *sp;
 171
 172        buf = read_object_file(oid, &type, &size);
 173        if (!buf)
 174                return;
 175        /* skip header */
 176        sp = strstr(buf, "\n\n");
 177
 178        if (!sp || !size || type != OBJ_TAG) {
 179                free(buf);
 180                return;
 181        }
 182        sp += 2; /* skip the 2 LFs */
 183        write_or_die(fd, sp, parse_signature(sp, buf + size - sp));
 184
 185        free(buf);
 186}
 187
 188static int build_tag_object(struct strbuf *buf, int sign, struct object_id *result)
 189{
 190        if (sign && do_sign(buf) < 0)
 191                return error(_("unable to sign the tag"));
 192        if (write_object_file(buf->buf, buf->len, tag_type, result) < 0)
 193                return error(_("unable to write tag file"));
 194        return 0;
 195}
 196
 197struct create_tag_options {
 198        unsigned int message_given:1;
 199        unsigned int use_editor:1;
 200        unsigned int sign;
 201        enum {
 202                CLEANUP_NONE,
 203                CLEANUP_SPACE,
 204                CLEANUP_ALL
 205        } cleanup_mode;
 206};
 207
 208static void create_tag(const struct object_id *object, const char *tag,
 209                       struct strbuf *buf, struct create_tag_options *opt,
 210                       struct object_id *prev, struct object_id *result)
 211{
 212        enum object_type type;
 213        struct strbuf header = STRBUF_INIT;
 214        char *path = NULL;
 215
 216        type = oid_object_info(the_repository, object, NULL);
 217        if (type <= OBJ_NONE)
 218            die(_("bad object type."));
 219
 220        strbuf_addf(&header,
 221                    "object %s\n"
 222                    "type %s\n"
 223                    "tag %s\n"
 224                    "tagger %s\n\n",
 225                    oid_to_hex(object),
 226                    type_name(type),
 227                    tag,
 228                    git_committer_info(IDENT_STRICT));
 229
 230        if (!opt->message_given || opt->use_editor) {
 231                int fd;
 232
 233                /* write the template message before editing: */
 234                path = git_pathdup("TAG_EDITMSG");
 235                fd = open(path, O_CREAT | O_TRUNC | O_WRONLY, 0600);
 236                if (fd < 0)
 237                        die_errno(_("could not create file '%s'"), path);
 238
 239                if (opt->message_given) {
 240                        write_or_die(fd, buf->buf, buf->len);
 241                        strbuf_reset(buf);
 242                } else if (!is_null_oid(prev)) {
 243                        write_tag_body(fd, prev);
 244                } else {
 245                        struct strbuf buf = STRBUF_INIT;
 246                        strbuf_addch(&buf, '\n');
 247                        if (opt->cleanup_mode == CLEANUP_ALL)
 248                                strbuf_commented_addf(&buf, _(tag_template), tag, comment_line_char);
 249                        else
 250                                strbuf_commented_addf(&buf, _(tag_template_nocleanup), tag, comment_line_char);
 251                        write_or_die(fd, buf.buf, buf.len);
 252                        strbuf_release(&buf);
 253                }
 254                close(fd);
 255
 256                if (launch_editor(path, buf, NULL)) {
 257                        fprintf(stderr,
 258                        _("Please supply the message using either -m or -F option.\n"));
 259                        exit(1);
 260                }
 261        }
 262
 263        if (opt->cleanup_mode != CLEANUP_NONE)
 264                strbuf_stripspace(buf, opt->cleanup_mode == CLEANUP_ALL);
 265
 266        if (!opt->message_given && !buf->len)
 267                die(_("no tag message?"));
 268
 269        strbuf_insert(buf, 0, header.buf, header.len);
 270        strbuf_release(&header);
 271
 272        if (build_tag_object(buf, opt->sign, result) < 0) {
 273                if (path)
 274                        fprintf(stderr, _("The tag message has been left in %s\n"),
 275                                path);
 276                exit(128);
 277        }
 278        if (path) {
 279                unlink_or_warn(path);
 280                free(path);
 281        }
 282}
 283
 284static void create_reflog_msg(const struct object_id *oid, struct strbuf *sb)
 285{
 286        enum object_type type;
 287        struct commit *c;
 288        char *buf;
 289        unsigned long size;
 290        int subject_len = 0;
 291        const char *subject_start;
 292
 293        char *rla = getenv("GIT_REFLOG_ACTION");
 294        if (rla) {
 295                strbuf_addstr(sb, rla);
 296        } else {
 297                strbuf_addstr(sb, "tag: tagging ");
 298                strbuf_add_unique_abbrev(sb, oid, DEFAULT_ABBREV);
 299        }
 300
 301        strbuf_addstr(sb, " (");
 302        type = oid_object_info(the_repository, oid, NULL);
 303        switch (type) {
 304        default:
 305                strbuf_addstr(sb, "object of unknown type");
 306                break;
 307        case OBJ_COMMIT:
 308                if ((buf = read_object_file(oid, &type, &size)) != NULL) {
 309                        subject_len = find_commit_subject(buf, &subject_start);
 310                        strbuf_insert(sb, sb->len, subject_start, subject_len);
 311                } else {
 312                        strbuf_addstr(sb, "commit object");
 313                }
 314                free(buf);
 315
 316                if ((c = lookup_commit_reference(the_repository, oid)) != NULL)
 317                        strbuf_addf(sb, ", %s", show_date(c->date, 0, DATE_MODE(SHORT)));
 318                break;
 319        case OBJ_TREE:
 320                strbuf_addstr(sb, "tree object");
 321                break;
 322        case OBJ_BLOB:
 323                strbuf_addstr(sb, "blob object");
 324                break;
 325        case OBJ_TAG:
 326                strbuf_addstr(sb, "other tag object");
 327                break;
 328        }
 329        strbuf_addch(sb, ')');
 330}
 331
 332struct msg_arg {
 333        int given;
 334        struct strbuf buf;
 335};
 336
 337static int parse_msg_arg(const struct option *opt, const char *arg, int unset)
 338{
 339        struct msg_arg *msg = opt->value;
 340
 341        BUG_ON_OPT_NEG(unset);
 342
 343        if (!arg)
 344                return -1;
 345        if (msg->buf.len)
 346                strbuf_addstr(&(msg->buf), "\n\n");
 347        strbuf_addstr(&(msg->buf), arg);
 348        msg->given = 1;
 349        return 0;
 350}
 351
 352static int strbuf_check_tag_ref(struct strbuf *sb, const char *name)
 353{
 354        if (name[0] == '-')
 355                return -1;
 356
 357        strbuf_reset(sb);
 358        strbuf_addf(sb, "refs/tags/%s", name);
 359
 360        return check_refname_format(sb->buf, 0);
 361}
 362
 363int cmd_tag(int argc, const char **argv, const char *prefix)
 364{
 365        struct strbuf buf = STRBUF_INIT;
 366        struct strbuf ref = STRBUF_INIT;
 367        struct strbuf reflog_msg = STRBUF_INIT;
 368        struct object_id object, prev;
 369        const char *object_ref, *tag;
 370        struct create_tag_options opt;
 371        char *cleanup_arg = NULL;
 372        int create_reflog = 0;
 373        int annotate = 0, force = 0;
 374        int cmdmode = 0, create_tag_object = 0;
 375        const char *msgfile = NULL, *keyid = NULL;
 376        struct msg_arg msg = { 0, STRBUF_INIT };
 377        struct ref_transaction *transaction;
 378        struct strbuf err = STRBUF_INIT;
 379        struct ref_filter filter;
 380        static struct ref_sorting *sorting = NULL, **sorting_tail = &sorting;
 381        struct ref_format format = REF_FORMAT_INIT;
 382        int icase = 0;
 383        int edit_flag = 0;
 384        struct option options[] = {
 385                OPT_CMDMODE('l', "list", &cmdmode, N_("list tag names"), 'l'),
 386                { OPTION_INTEGER, 'n', NULL, &filter.lines, N_("n"),
 387                                N_("print <n> lines of each tag message"),
 388                                PARSE_OPT_OPTARG, NULL, 1 },
 389                OPT_CMDMODE('d', "delete", &cmdmode, N_("delete tags"), 'd'),
 390                OPT_CMDMODE('v', "verify", &cmdmode, N_("verify tags"), 'v'),
 391
 392                OPT_GROUP(N_("Tag creation options")),
 393                OPT_BOOL('a', "annotate", &annotate,
 394                                        N_("annotated tag, needs a message")),
 395                { OPTION_CALLBACK, 'm', "message", &msg, N_("message"),
 396                  N_("tag message"), PARSE_OPT_NONEG, parse_msg_arg },
 397                OPT_FILENAME('F', "file", &msgfile, N_("read message from file")),
 398                OPT_BOOL('e', "edit", &edit_flag, N_("force edit of tag message")),
 399                OPT_BOOL('s', "sign", &opt.sign, N_("annotated and GPG-signed tag")),
 400                OPT_STRING(0, "cleanup", &cleanup_arg, N_("mode"),
 401                        N_("how to strip spaces and #comments from message")),
 402                OPT_STRING('u', "local-user", &keyid, N_("key-id"),
 403                                        N_("use another key to sign the tag")),
 404                OPT__FORCE(&force, N_("replace the tag if exists"), 0),
 405                OPT_BOOL(0, "create-reflog", &create_reflog, N_("create a reflog")),
 406
 407                OPT_GROUP(N_("Tag listing options")),
 408                OPT_COLUMN(0, "column", &colopts, N_("show tag list in columns")),
 409                OPT_CONTAINS(&filter.with_commit, N_("print only tags that contain the commit")),
 410                OPT_NO_CONTAINS(&filter.no_commit, N_("print only tags that don't contain the commit")),
 411                OPT_WITH(&filter.with_commit, N_("print only tags that contain the commit")),
 412                OPT_WITHOUT(&filter.no_commit, N_("print only tags that don't contain the commit")),
 413                OPT_MERGED(&filter, N_("print only tags that are merged")),
 414                OPT_NO_MERGED(&filter, N_("print only tags that are not merged")),
 415                OPT_CALLBACK(0 , "sort", sorting_tail, N_("key"),
 416                             N_("field name to sort on"), &parse_opt_ref_sorting),
 417                {
 418                        OPTION_CALLBACK, 0, "points-at", &filter.points_at, N_("object"),
 419                        N_("print only tags of the object"), PARSE_OPT_LASTARG_DEFAULT,
 420                        parse_opt_object_name, (intptr_t) "HEAD"
 421                },
 422                OPT_STRING(  0 , "format", &format.format, N_("format"),
 423                           N_("format to use for the output")),
 424                OPT__COLOR(&format.use_color, N_("respect format colors")),
 425                OPT_BOOL('i', "ignore-case", &icase, N_("sorting and filtering are case insensitive")),
 426                OPT_END()
 427        };
 428
 429        setup_ref_filter_porcelain_msg();
 430
 431        git_config(git_tag_config, sorting_tail);
 432
 433        memset(&opt, 0, sizeof(opt));
 434        memset(&filter, 0, sizeof(filter));
 435        filter.lines = -1;
 436
 437        argc = parse_options(argc, argv, prefix, options, git_tag_usage, 0);
 438
 439        if (keyid) {
 440                opt.sign = 1;
 441                set_signing_key(keyid);
 442        }
 443        create_tag_object = (opt.sign || annotate || msg.given || msgfile);
 444
 445        if (!cmdmode) {
 446                if (argc == 0)
 447                        cmdmode = 'l';
 448                else if (filter.with_commit || filter.no_commit ||
 449                         filter.points_at.nr || filter.merge_commit ||
 450                         filter.lines != -1)
 451                        cmdmode = 'l';
 452        }
 453
 454        if (cmdmode == 'l')
 455                setup_auto_pager("tag", 1);
 456
 457        if ((create_tag_object || force) && (cmdmode != 0))
 458                usage_with_options(git_tag_usage, options);
 459
 460        finalize_colopts(&colopts, -1);
 461        if (cmdmode == 'l' && filter.lines != -1) {
 462                if (explicitly_enable_column(colopts))
 463                        die(_("--column and -n are incompatible"));
 464                colopts = 0;
 465        }
 466        if (!sorting)
 467                sorting = ref_default_sorting();
 468        sorting->ignore_case = icase;
 469        filter.ignore_case = icase;
 470        if (cmdmode == 'l') {
 471                int ret;
 472                if (column_active(colopts)) {
 473                        struct column_options copts;
 474                        memset(&copts, 0, sizeof(copts));
 475                        copts.padding = 2;
 476                        run_column_filter(colopts, &copts);
 477                }
 478                filter.name_patterns = argv;
 479                ret = list_tags(&filter, sorting, &format);
 480                if (column_active(colopts))
 481                        stop_column_filter();
 482                return ret;
 483        }
 484        if (filter.lines != -1)
 485                die(_("-n option is only allowed in list mode"));
 486        if (filter.with_commit)
 487                die(_("--contains option is only allowed in list mode"));
 488        if (filter.no_commit)
 489                die(_("--no-contains option is only allowed in list mode"));
 490        if (filter.points_at.nr)
 491                die(_("--points-at option is only allowed in list mode"));
 492        if (filter.merge_commit)
 493                die(_("--merged and --no-merged options are only allowed in list mode"));
 494        if (cmdmode == 'd')
 495                return for_each_tag_name(argv, delete_tag, NULL);
 496        if (cmdmode == 'v') {
 497                if (format.format && verify_ref_format(&format))
 498                        usage_with_options(git_tag_usage, options);
 499                return for_each_tag_name(argv, verify_tag, &format);
 500        }
 501
 502        if (msg.given || msgfile) {
 503                if (msg.given && msgfile)
 504                        die(_("only one -F or -m option is allowed."));
 505                if (msg.given)
 506                        strbuf_addbuf(&buf, &(msg.buf));
 507                else {
 508                        if (!strcmp(msgfile, "-")) {
 509                                if (strbuf_read(&buf, 0, 1024) < 0)
 510                                        die_errno(_("cannot read '%s'"), msgfile);
 511                        } else {
 512                                if (strbuf_read_file(&buf, msgfile, 1024) < 0)
 513                                        die_errno(_("could not open or read '%s'"),
 514                                                msgfile);
 515                        }
 516                }
 517        }
 518
 519        tag = argv[0];
 520
 521        object_ref = argc == 2 ? argv[1] : "HEAD";
 522        if (argc > 2)
 523                die(_("too many params"));
 524
 525        if (get_oid(object_ref, &object))
 526                die(_("Failed to resolve '%s' as a valid ref."), object_ref);
 527
 528        if (strbuf_check_tag_ref(&ref, tag))
 529                die(_("'%s' is not a valid tag name."), tag);
 530
 531        if (read_ref(ref.buf, &prev))
 532                oidclr(&prev);
 533        else if (!force)
 534                die(_("tag '%s' already exists"), tag);
 535
 536        opt.message_given = msg.given || msgfile;
 537        opt.use_editor = edit_flag;
 538
 539        if (!cleanup_arg || !strcmp(cleanup_arg, "strip"))
 540                opt.cleanup_mode = CLEANUP_ALL;
 541        else if (!strcmp(cleanup_arg, "verbatim"))
 542                opt.cleanup_mode = CLEANUP_NONE;
 543        else if (!strcmp(cleanup_arg, "whitespace"))
 544                opt.cleanup_mode = CLEANUP_SPACE;
 545        else
 546                die(_("Invalid cleanup mode %s"), cleanup_arg);
 547
 548        create_reflog_msg(&object, &reflog_msg);
 549
 550        if (create_tag_object) {
 551                if (force_sign_annotate && !annotate)
 552                        opt.sign = 1;
 553                create_tag(&object, tag, &buf, &opt, &prev, &object);
 554        }
 555
 556        transaction = ref_transaction_begin(&err);
 557        if (!transaction ||
 558            ref_transaction_update(transaction, ref.buf, &object, &prev,
 559                                   create_reflog ? REF_FORCE_CREATE_REFLOG : 0,
 560                                   reflog_msg.buf, &err) ||
 561            ref_transaction_commit(transaction, &err))
 562                die("%s", err.buf);
 563        ref_transaction_free(transaction);
 564        if (force && !is_null_oid(&prev) && !oideq(&prev, &object))
 565                printf(_("Updated tag '%s' (was %s)\n"), tag,
 566                       find_unique_abbrev(&prev, DEFAULT_ABBREV));
 567
 568        UNLEAK(buf);
 569        UNLEAK(ref);
 570        UNLEAK(reflog_msg);
 571        UNLEAK(msg);
 572        UNLEAK(err);
 573        return 0;
 574}