Andrew's git - gitweb.git/blob

   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
  22static 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
  31static unsigned int colopts;
  32
  33static 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
  67typedef int (*each_tag_name_fn)(const char *name, const char *ref,
  68                                const unsigned char *sha1);
  69
  70static 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
  95static 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
 104static 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
 116static int do_sign(struct strbuf *buffer)
 117{
 118        return sign_buffer(buffer, buffer, get_signing_key());
 119}
 120
 121static const char tag_template[] =
 122        N_("\nWrite a message for tag:\n  %s\n"
 123        "Lines starting with '%c' will be ignored.\n");
 124
 125static 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 */
 131static 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
 154static 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
 174static 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
 196static 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
 205struct 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
 215static 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
 291struct msg_arg {
 292        int given;
 293        struct strbuf buf;
 294};
 295
 296static 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
 309static 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
 320int 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}