Andrew's git / gitweb.git / builtin/tag.c
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builtin / tag.con commit Merge branch 'la/tag-force-signing-annotated-tags' (a2595f0)
   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;
  32static int force_sign_annotate;
  33
  34static int list_tags(struct ref_filter *filter, struct ref_sorting *sorting, const char *format)
  35{
  36        struct ref_array array;
  37        char *to_free = NULL;
  38        int i;
  39
  40        memset(&array, 0, sizeof(array));
  41
  42        if (filter->lines == -1)
  43                filter->lines = 0;
  44
  45        if (!format) {
  46                if (filter->lines) {
  47                        to_free = xstrfmt("%s %%(contents:lines=%d)",
  48                                          "%(align:15)%(refname:strip=2)%(end)",
  49                                          filter->lines);
  50                        format = to_free;
  51                } else
  52                        format = "%(refname:strip=2)";
  53        }
  54
  55        verify_ref_format(format);
  56        filter->with_commit_tag_algo = 1;
  57        filter_refs(&array, filter, FILTER_REFS_TAGS);
  58        ref_array_sort(sorting, &array);
  59
  60        for (i = 0; i < array.nr; i++)
  61                show_ref_array_item(array.items[i], format, 0);
  62        ref_array_clear(&array);
  63        free(to_free);
  64
  65        return 0;
  66}
  67
  68typedef int (*each_tag_name_fn)(const char *name, const char *ref,
  69                                const unsigned char *sha1);
  70
  71static int for_each_tag_name(const char **argv, each_tag_name_fn fn)
  72{
  73        const char **p;
  74        char ref[PATH_MAX];
  75        int had_error = 0;
  76        unsigned char sha1[20];
  77
  78        for (p = argv; *p; p++) {
  79                if (snprintf(ref, sizeof(ref), "refs/tags/%s", *p)
  80                                        >= sizeof(ref)) {
  81                        error(_("tag name too long: %.*s..."), 50, *p);
  82                        had_error = 1;
  83                        continue;
  84                }
  85                if (read_ref(ref, sha1)) {
  86                        error(_("tag '%s' not found."), *p);
  87                        had_error = 1;
  88                        continue;
  89                }
  90                if (fn(*p, ref, sha1))
  91                        had_error = 1;
  92        }
  93        return had_error;
  94}
  95
  96static int delete_tag(const char *name, const char *ref,
  97                                const unsigned char *sha1)
  98{
  99        if (delete_ref(ref, sha1, 0))
 100                return 1;
 101        printf(_("Deleted tag '%s' (was %s)\n"), name, find_unique_abbrev(sha1, DEFAULT_ABBREV));
 102        return 0;
 103}
 104
 105static int verify_tag(const char *name, const char *ref,
 106                                const unsigned char *sha1)
 107{
 108        const char *argv_verify_tag[] = {"verify-tag",
 109                                        "-v", "SHA1_HEX", NULL};
 110        argv_verify_tag[2] = sha1_to_hex(sha1);
 111
 112        if (run_command_v_opt(argv_verify_tag, RUN_GIT_CMD))
 113                return error(_("could not verify the tag '%s'"), name);
 114        return 0;
 115}
 116
 117static int do_sign(struct strbuf *buffer)
 118{
 119        return sign_buffer(buffer, buffer, get_signing_key());
 120}
 121
 122static const char tag_template[] =
 123        N_("\nWrite a message for tag:\n  %s\n"
 124        "Lines starting with '%c' will be ignored.\n");
 125
 126static const char tag_template_nocleanup[] =
 127        N_("\nWrite a message for tag:\n  %s\n"
 128        "Lines starting with '%c' will be kept; you may remove them"
 129        " yourself if you want to.\n");
 130
 131/* Parse arg given and add it the ref_sorting array */
 132static int parse_sorting_string(const char *arg, struct ref_sorting **sorting_tail)
 133{
 134        struct ref_sorting *s;
 135        int len;
 136
 137        s = xcalloc(1, sizeof(*s));
 138        s->next = *sorting_tail;
 139        *sorting_tail = s;
 140
 141        if (*arg == '-') {
 142                s->reverse = 1;
 143                arg++;
 144        }
 145        if (skip_prefix(arg, "version:", &arg) ||
 146            skip_prefix(arg, "v:", &arg))
 147                s->version = 1;
 148
 149        len = strlen(arg);
 150        s->atom = parse_ref_filter_atom(arg, arg+len);
 151
 152        return 0;
 153}
 154
 155static int git_tag_config(const char *var, const char *value, void *cb)
 156{
 157        int status;
 158        struct ref_sorting **sorting_tail = (struct ref_sorting **)cb;
 159
 160        if (!strcmp(var, "tag.sort")) {
 161                if (!value)
 162                        return config_error_nonbool(var);
 163                parse_sorting_string(value, sorting_tail);
 164                return 0;
 165        }
 166
 167        status = git_gpg_config(var, value, cb);
 168        if (status)
 169                return status;
 170        if (!strcmp(var, "tag.forcesignannotated")) {
 171                force_sign_annotate = git_config_bool(var, value);
 172                return 0;
 173        }
 174
 175        if (starts_with(var, "column."))
 176                return git_column_config(var, value, "tag", &colopts);
 177        return git_default_config(var, value, cb);
 178}
 179
 180static void write_tag_body(int fd, const unsigned char *sha1)
 181{
 182        unsigned long size;
 183        enum object_type type;
 184        char *buf, *sp;
 185
 186        buf = read_sha1_file(sha1, &type, &size);
 187        if (!buf)
 188                return;
 189        /* skip header */
 190        sp = strstr(buf, "\n\n");
 191
 192        if (!sp || !size || type != OBJ_TAG) {
 193                free(buf);
 194                return;
 195        }
 196        sp += 2; /* skip the 2 LFs */
 197        write_or_die(fd, sp, parse_signature(sp, buf + size - sp));
 198
 199        free(buf);
 200}
 201
 202static int build_tag_object(struct strbuf *buf, int sign, unsigned char *result)
 203{
 204        if (sign && do_sign(buf) < 0)
 205                return error(_("unable to sign the tag"));
 206        if (write_sha1_file(buf->buf, buf->len, tag_type, result) < 0)
 207                return error(_("unable to write tag file"));
 208        return 0;
 209}
 210
 211struct create_tag_options {
 212        unsigned int message_given:1;
 213        unsigned int sign;
 214        enum {
 215                CLEANUP_NONE,
 216                CLEANUP_SPACE,
 217                CLEANUP_ALL
 218        } cleanup_mode;
 219};
 220
 221static void create_tag(const unsigned char *object, const char *tag,
 222                       struct strbuf *buf, struct create_tag_options *opt,
 223                       unsigned char *prev, unsigned char *result)
 224{
 225        enum object_type type;
 226        char header_buf[1024];
 227        int header_len;
 228        char *path = NULL;
 229
 230        type = sha1_object_info(object, NULL);
 231        if (type <= OBJ_NONE)
 232            die(_("bad object type."));
 233
 234        header_len = snprintf(header_buf, sizeof(header_buf),
 235                          "object %s\n"
 236                          "type %s\n"
 237                          "tag %s\n"
 238                          "tagger %s\n\n",
 239                          sha1_to_hex(object),
 240                          typename(type),
 241                          tag,
 242                          git_committer_info(IDENT_STRICT));
 243
 244        if (header_len > sizeof(header_buf) - 1)
 245                die(_("tag header too big."));
 246
 247        if (!opt->message_given) {
 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 (!is_null_sha1(prev)) {
 257                        write_tag_body(fd, prev);
 258                } else {
 259                        struct strbuf buf = STRBUF_INIT;
 260                        strbuf_addch(&buf, '\n');
 261                        if (opt->cleanup_mode == CLEANUP_ALL)
 262                                strbuf_commented_addf(&buf, _(tag_template), tag, comment_line_char);
 263                        else
 264                                strbuf_commented_addf(&buf, _(tag_template_nocleanup), tag, comment_line_char);
 265                        write_or_die(fd, buf.buf, buf.len);
 266                        strbuf_release(&buf);
 267                }
 268                close(fd);
 269
 270                if (launch_editor(path, buf, NULL)) {
 271                        fprintf(stderr,
 272                        _("Please supply the message using either -m or -F option.\n"));
 273                        exit(1);
 274                }
 275        }
 276
 277        if (opt->cleanup_mode != CLEANUP_NONE)
 278                strbuf_stripspace(buf, opt->cleanup_mode == CLEANUP_ALL);
 279
 280        if (!opt->message_given && !buf->len)
 281                die(_("no tag message?"));
 282
 283        strbuf_insert(buf, 0, header_buf, header_len);
 284
 285        if (build_tag_object(buf, opt->sign, result) < 0) {
 286                if (path)
 287                        fprintf(stderr, _("The tag message has been left in %s\n"),
 288                                path);
 289                exit(128);
 290        }
 291        if (path) {
 292                unlink_or_warn(path);
 293                free(path);
 294        }
 295}
 296
 297struct msg_arg {
 298        int given;
 299        struct strbuf buf;
 300};
 301
 302static int parse_msg_arg(const struct option *opt, const char *arg, int unset)
 303{
 304        struct msg_arg *msg = opt->value;
 305
 306        if (!arg)
 307                return -1;
 308        if (msg->buf.len)
 309                strbuf_addstr(&(msg->buf), "\n\n");
 310        strbuf_addstr(&(msg->buf), arg);
 311        msg->given = 1;
 312        return 0;
 313}
 314
 315static int strbuf_check_tag_ref(struct strbuf *sb, const char *name)
 316{
 317        if (name[0] == '-')
 318                return -1;
 319
 320        strbuf_reset(sb);
 321        strbuf_addf(sb, "refs/tags/%s", name);
 322
 323        return check_refname_format(sb->buf, 0);
 324}
 325
 326int cmd_tag(int argc, const char **argv, const char *prefix)
 327{
 328        struct strbuf buf = STRBUF_INIT;
 329        struct strbuf ref = STRBUF_INIT;
 330        unsigned char object[20], prev[20];
 331        const char *object_ref, *tag;
 332        struct create_tag_options opt;
 333        char *cleanup_arg = NULL;
 334        int create_reflog = 0;
 335        int annotate = 0, force = 0;
 336        int cmdmode = 0, create_tag_object = 0;
 337        const char *msgfile = NULL, *keyid = NULL;
 338        struct msg_arg msg = { 0, STRBUF_INIT };
 339        struct ref_transaction *transaction;
 340        struct strbuf err = STRBUF_INIT;
 341        struct ref_filter filter;
 342        static struct ref_sorting *sorting = NULL, **sorting_tail = &sorting;
 343        const char *format = NULL;
 344        struct option options[] = {
 345                OPT_CMDMODE('l', "list", &cmdmode, N_("list tag names"), 'l'),
 346                { OPTION_INTEGER, 'n', NULL, &filter.lines, N_("n"),
 347                                N_("print <n> lines of each tag message"),
 348                                PARSE_OPT_OPTARG, NULL, 1 },
 349                OPT_CMDMODE('d', "delete", &cmdmode, N_("delete tags"), 'd'),
 350                OPT_CMDMODE('v', "verify", &cmdmode, N_("verify tags"), 'v'),
 351
 352                OPT_GROUP(N_("Tag creation options")),
 353                OPT_BOOL('a', "annotate", &annotate,
 354                                        N_("annotated tag, needs a message")),
 355                OPT_CALLBACK('m', "message", &msg, N_("message"),
 356                             N_("tag message"), parse_msg_arg),
 357                OPT_FILENAME('F', "file", &msgfile, N_("read message from file")),
 358                OPT_BOOL('s', "sign", &opt.sign, N_("annotated and GPG-signed tag")),
 359                OPT_STRING(0, "cleanup", &cleanup_arg, N_("mode"),
 360                        N_("how to strip spaces and #comments from message")),
 361                OPT_STRING('u', "local-user", &keyid, N_("key-id"),
 362                                        N_("use another key to sign the tag")),
 363                OPT__FORCE(&force, N_("replace the tag if exists")),
 364                OPT_BOOL(0, "create-reflog", &create_reflog, N_("create a reflog")),
 365
 366                OPT_GROUP(N_("Tag listing options")),
 367                OPT_COLUMN(0, "column", &colopts, N_("show tag list in columns")),
 368                OPT_CONTAINS(&filter.with_commit, N_("print only tags that contain the commit")),
 369                OPT_WITH(&filter.with_commit, N_("print only tags that contain the commit")),
 370                OPT_MERGED(&filter, N_("print only tags that are merged")),
 371                OPT_NO_MERGED(&filter, N_("print only tags that are not merged")),
 372                OPT_CALLBACK(0 , "sort", sorting_tail, N_("key"),
 373                             N_("field name to sort on"), &parse_opt_ref_sorting),
 374                {
 375                        OPTION_CALLBACK, 0, "points-at", &filter.points_at, N_("object"),
 376                        N_("print only tags of the object"), 0, parse_opt_object_name
 377                },
 378                OPT_STRING(  0 , "format", &format, N_("format"), N_("format to use for the output")),
 379                OPT_END()
 380        };
 381
 382        git_config(git_tag_config, sorting_tail);
 383
 384        memset(&opt, 0, sizeof(opt));
 385        memset(&filter, 0, sizeof(filter));
 386        filter.lines = -1;
 387
 388        argc = parse_options(argc, argv, prefix, options, git_tag_usage, 0);
 389
 390        if (keyid) {
 391                opt.sign = 1;
 392                set_signing_key(keyid);
 393        }
 394        create_tag_object = (opt.sign || annotate || msg.given || msgfile);
 395
 396        if (argc == 0 && !cmdmode)
 397                cmdmode = 'l';
 398
 399        if ((create_tag_object || force) && (cmdmode != 0))
 400                usage_with_options(git_tag_usage, options);
 401
 402        finalize_colopts(&colopts, -1);
 403        if (cmdmode == 'l' && filter.lines != -1) {
 404                if (explicitly_enable_column(colopts))
 405                        die(_("--column and -n are incompatible"));
 406                colopts = 0;
 407        }
 408        if (!sorting)
 409                sorting = ref_default_sorting();
 410        if (cmdmode == 'l') {
 411                int ret;
 412                if (column_active(colopts)) {
 413                        struct column_options copts;
 414                        memset(&copts, 0, sizeof(copts));
 415                        copts.padding = 2;
 416                        run_column_filter(colopts, &copts);
 417                }
 418                filter.name_patterns = argv;
 419                ret = list_tags(&filter, sorting, format);
 420                if (column_active(colopts))
 421                        stop_column_filter();
 422                return ret;
 423        }
 424        if (filter.lines != -1)
 425                die(_("-n option is only allowed with -l."));
 426        if (filter.with_commit)
 427                die(_("--contains option is only allowed with -l."));
 428        if (filter.points_at.nr)
 429                die(_("--points-at option is only allowed with -l."));
 430        if (filter.merge_commit)
 431                die(_("--merged and --no-merged option are only allowed with -l"));
 432        if (cmdmode == 'd')
 433                return for_each_tag_name(argv, delete_tag);
 434        if (cmdmode == 'v')
 435                return for_each_tag_name(argv, verify_tag);
 436
 437        if (msg.given || msgfile) {
 438                if (msg.given && msgfile)
 439                        die(_("only one -F or -m option is allowed."));
 440                if (msg.given)
 441                        strbuf_addbuf(&buf, &(msg.buf));
 442                else {
 443                        if (!strcmp(msgfile, "-")) {
 444                                if (strbuf_read(&buf, 0, 1024) < 0)
 445                                        die_errno(_("cannot read '%s'"), msgfile);
 446                        } else {
 447                                if (strbuf_read_file(&buf, msgfile, 1024) < 0)
 448                                        die_errno(_("could not open or read '%s'"),
 449                                                msgfile);
 450                        }
 451                }
 452        }
 453
 454        tag = argv[0];
 455
 456        object_ref = argc == 2 ? argv[1] : "HEAD";
 457        if (argc > 2)
 458                die(_("too many params"));
 459
 460        if (get_sha1(object_ref, object))
 461                die(_("Failed to resolve '%s' as a valid ref."), object_ref);
 462
 463        if (strbuf_check_tag_ref(&ref, tag))
 464                die(_("'%s' is not a valid tag name."), tag);
 465
 466        if (read_ref(ref.buf, prev))
 467                hashclr(prev);
 468        else if (!force)
 469                die(_("tag '%s' already exists"), tag);
 470
 471        opt.message_given = msg.given || msgfile;
 472
 473        if (!cleanup_arg || !strcmp(cleanup_arg, "strip"))
 474                opt.cleanup_mode = CLEANUP_ALL;
 475        else if (!strcmp(cleanup_arg, "verbatim"))
 476                opt.cleanup_mode = CLEANUP_NONE;
 477        else if (!strcmp(cleanup_arg, "whitespace"))
 478                opt.cleanup_mode = CLEANUP_SPACE;
 479        else
 480                die(_("Invalid cleanup mode %s"), cleanup_arg);
 481
 482        if (create_tag_object) {
 483                if (force_sign_annotate && !annotate)
 484                        opt.sign = 1;
 485                create_tag(object, tag, &buf, &opt, prev, object);
 486        }
 487
 488        transaction = ref_transaction_begin(&err);
 489        if (!transaction ||
 490            ref_transaction_update(transaction, ref.buf, object, prev,
 491                                   create_reflog ? REF_FORCE_CREATE_REFLOG : 0,
 492                                   NULL, &err) ||
 493            ref_transaction_commit(transaction, &err))
 494                die("%s", err.buf);
 495        ref_transaction_free(transaction);
 496        if (force && !is_null_sha1(prev) && hashcmp(prev, object))
 497                printf(_("Updated tag '%s' (was %s)\n"), tag, find_unique_abbrev(prev, DEFAULT_ABBREV));
 498
 499        strbuf_release(&err);
 500        strbuf_release(&buf);
 501        strbuf_release(&ref);
 502        return 0;
 503}