Andrew's git / gitweb.git / builtin/worktree.c
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builtin / worktree.con commit worktree move: accept destination as directory (c64a8d2)
   1#include "cache.h"
   2#include "checkout.h"
   3#include "config.h"
   4#include "builtin.h"
   5#include "dir.h"
   6#include "parse-options.h"
   7#include "argv-array.h"
   8#include "branch.h"
   9#include "refs.h"
  10#include "run-command.h"
  11#include "sigchain.h"
  12#include "refs.h"
  13#include "utf8.h"
  14#include "worktree.h"
  15
  16static const char * const worktree_usage[] = {
  17        N_("git worktree add [<options>] <path> [<branch>]"),
  18        N_("git worktree list [<options>]"),
  19        N_("git worktree lock [<options>] <path>"),
  20        N_("git worktree move <worktree> <new-path>"),
  21        N_("git worktree prune [<options>]"),
  22        N_("git worktree unlock <path>"),
  23        NULL
  24};
  25
  26struct add_opts {
  27        int force;
  28        int detach;
  29        int checkout;
  30        int keep_locked;
  31        const char *new_branch;
  32        int force_new_branch;
  33};
  34
  35static int show_only;
  36static int verbose;
  37static int guess_remote;
  38static timestamp_t expire;
  39
  40static int git_worktree_config(const char *var, const char *value, void *cb)
  41{
  42        if (!strcmp(var, "worktree.guessremote")) {
  43                guess_remote = git_config_bool(var, value);
  44                return 0;
  45        }
  46
  47        return git_default_config(var, value, cb);
  48}
  49
  50static int prune_worktree(const char *id, struct strbuf *reason)
  51{
  52        struct stat st;
  53        char *path;
  54        int fd;
  55        size_t len;
  56        ssize_t read_result;
  57
  58        if (!is_directory(git_path("worktrees/%s", id))) {
  59                strbuf_addf(reason, _("Removing worktrees/%s: not a valid directory"), id);
  60                return 1;
  61        }
  62        if (file_exists(git_path("worktrees/%s/locked", id)))
  63                return 0;
  64        if (stat(git_path("worktrees/%s/gitdir", id), &st)) {
  65                strbuf_addf(reason, _("Removing worktrees/%s: gitdir file does not exist"), id);
  66                return 1;
  67        }
  68        fd = open(git_path("worktrees/%s/gitdir", id), O_RDONLY);
  69        if (fd < 0) {
  70                strbuf_addf(reason, _("Removing worktrees/%s: unable to read gitdir file (%s)"),
  71                            id, strerror(errno));
  72                return 1;
  73        }
  74        len = xsize_t(st.st_size);
  75        path = xmallocz(len);
  76
  77        read_result = read_in_full(fd, path, len);
  78        if (read_result < 0) {
  79                strbuf_addf(reason, _("Removing worktrees/%s: unable to read gitdir file (%s)"),
  80                            id, strerror(errno));
  81                close(fd);
  82                free(path);
  83                return 1;
  84        }
  85        close(fd);
  86
  87        if (read_result != len) {
  88                strbuf_addf(reason,
  89                            _("Removing worktrees/%s: short read (expected %"PRIuMAX" bytes, read %"PRIuMAX")"),
  90                            id, (uintmax_t)len, (uintmax_t)read_result);
  91                free(path);
  92                return 1;
  93        }
  94        while (len && (path[len - 1] == '\n' || path[len - 1] == '\r'))
  95                len--;
  96        if (!len) {
  97                strbuf_addf(reason, _("Removing worktrees/%s: invalid gitdir file"), id);
  98                free(path);
  99                return 1;
 100        }
 101        path[len] = '\0';
 102        if (!file_exists(path)) {
 103                struct stat st_link;
 104                free(path);
 105                /*
 106                 * the repo is moved manually and has not been
 107                 * accessed since?
 108                 */
 109                if (!stat(git_path("worktrees/%s/link", id), &st_link) &&
 110                    st_link.st_nlink > 1)
 111                        return 0;
 112                if (st.st_mtime <= expire) {
 113                        strbuf_addf(reason, _("Removing worktrees/%s: gitdir file points to non-existent location"), id);
 114                        return 1;
 115                } else {
 116                        return 0;
 117                }
 118        }
 119        free(path);
 120        return 0;
 121}
 122
 123static void prune_worktrees(void)
 124{
 125        struct strbuf reason = STRBUF_INIT;
 126        struct strbuf path = STRBUF_INIT;
 127        DIR *dir = opendir(git_path("worktrees"));
 128        struct dirent *d;
 129        int ret;
 130        if (!dir)
 131                return;
 132        while ((d = readdir(dir)) != NULL) {
 133                if (is_dot_or_dotdot(d->d_name))
 134                        continue;
 135                strbuf_reset(&reason);
 136                if (!prune_worktree(d->d_name, &reason))
 137                        continue;
 138                if (show_only || verbose)
 139                        printf("%s\n", reason.buf);
 140                if (show_only)
 141                        continue;
 142                git_path_buf(&path, "worktrees/%s", d->d_name);
 143                ret = remove_dir_recursively(&path, 0);
 144                if (ret < 0 && errno == ENOTDIR)
 145                        ret = unlink(path.buf);
 146                if (ret)
 147                        error_errno(_("failed to remove '%s'"), path.buf);
 148        }
 149        closedir(dir);
 150        if (!show_only)
 151                rmdir(git_path("worktrees"));
 152        strbuf_release(&reason);
 153        strbuf_release(&path);
 154}
 155
 156static int prune(int ac, const char **av, const char *prefix)
 157{
 158        struct option options[] = {
 159                OPT__DRY_RUN(&show_only, N_("do not remove, show only")),
 160                OPT__VERBOSE(&verbose, N_("report pruned working trees")),
 161                OPT_EXPIRY_DATE(0, "expire", &expire,
 162                                N_("expire working trees older than <time>")),
 163                OPT_END()
 164        };
 165
 166        expire = TIME_MAX;
 167        ac = parse_options(ac, av, prefix, options, worktree_usage, 0);
 168        if (ac)
 169                usage_with_options(worktree_usage, options);
 170        prune_worktrees();
 171        return 0;
 172}
 173
 174static char *junk_work_tree;
 175static char *junk_git_dir;
 176static int is_junk;
 177static pid_t junk_pid;
 178
 179static void remove_junk(void)
 180{
 181        struct strbuf sb = STRBUF_INIT;
 182        if (!is_junk || getpid() != junk_pid)
 183                return;
 184        if (junk_git_dir) {
 185                strbuf_addstr(&sb, junk_git_dir);
 186                remove_dir_recursively(&sb, 0);
 187                strbuf_reset(&sb);
 188        }
 189        if (junk_work_tree) {
 190                strbuf_addstr(&sb, junk_work_tree);
 191                remove_dir_recursively(&sb, 0);
 192        }
 193        strbuf_release(&sb);
 194}
 195
 196static void remove_junk_on_signal(int signo)
 197{
 198        remove_junk();
 199        sigchain_pop(signo);
 200        raise(signo);
 201}
 202
 203static const char *worktree_basename(const char *path, int *olen)
 204{
 205        const char *name;
 206        int len;
 207
 208        len = strlen(path);
 209        while (len && is_dir_sep(path[len - 1]))
 210                len--;
 211
 212        for (name = path + len - 1; name > path; name--)
 213                if (is_dir_sep(*name)) {
 214                        name++;
 215                        break;
 216                }
 217
 218        *olen = len;
 219        return name;
 220}
 221
 222static int add_worktree(const char *path, const char *refname,
 223                        const struct add_opts *opts)
 224{
 225        struct strbuf sb_git = STRBUF_INIT, sb_repo = STRBUF_INIT;
 226        struct strbuf sb = STRBUF_INIT;
 227        const char *name;
 228        struct stat st;
 229        struct child_process cp = CHILD_PROCESS_INIT;
 230        struct argv_array child_env = ARGV_ARRAY_INIT;
 231        int counter = 0, len, ret;
 232        struct strbuf symref = STRBUF_INIT;
 233        struct commit *commit = NULL;
 234        int is_branch = 0;
 235
 236        if (file_exists(path) && !is_empty_dir(path))
 237                die(_("'%s' already exists"), path);
 238
 239        /* is 'refname' a branch or commit? */
 240        if (!opts->detach && !strbuf_check_branch_ref(&symref, refname) &&
 241            ref_exists(symref.buf)) {
 242                is_branch = 1;
 243                if (!opts->force)
 244                        die_if_checked_out(symref.buf, 0);
 245        }
 246        commit = lookup_commit_reference_by_name(refname);
 247        if (!commit)
 248                die(_("invalid reference: %s"), refname);
 249
 250        name = worktree_basename(path, &len);
 251        git_path_buf(&sb_repo, "worktrees/%.*s", (int)(path + len - name), name);
 252        len = sb_repo.len;
 253        if (safe_create_leading_directories_const(sb_repo.buf))
 254                die_errno(_("could not create leading directories of '%s'"),
 255                          sb_repo.buf);
 256        while (!stat(sb_repo.buf, &st)) {
 257                counter++;
 258                strbuf_setlen(&sb_repo, len);
 259                strbuf_addf(&sb_repo, "%d", counter);
 260        }
 261        name = strrchr(sb_repo.buf, '/') + 1;
 262
 263        junk_pid = getpid();
 264        atexit(remove_junk);
 265        sigchain_push_common(remove_junk_on_signal);
 266
 267        if (mkdir(sb_repo.buf, 0777))
 268                die_errno(_("could not create directory of '%s'"), sb_repo.buf);
 269        junk_git_dir = xstrdup(sb_repo.buf);
 270        is_junk = 1;
 271
 272        /*
 273         * lock the incomplete repo so prune won't delete it, unlock
 274         * after the preparation is over.
 275         */
 276        strbuf_addf(&sb, "%s/locked", sb_repo.buf);
 277        if (!opts->keep_locked)
 278                write_file(sb.buf, "initializing");
 279        else
 280                write_file(sb.buf, "added with --lock");
 281
 282        strbuf_addf(&sb_git, "%s/.git", path);
 283        if (safe_create_leading_directories_const(sb_git.buf))
 284                die_errno(_("could not create leading directories of '%s'"),
 285                          sb_git.buf);
 286        junk_work_tree = xstrdup(path);
 287
 288        strbuf_reset(&sb);
 289        strbuf_addf(&sb, "%s/gitdir", sb_repo.buf);
 290        write_file(sb.buf, "%s", real_path(sb_git.buf));
 291        write_file(sb_git.buf, "gitdir: %s/worktrees/%s",
 292                   real_path(get_git_common_dir()), name);
 293        /*
 294         * This is to keep resolve_ref() happy. We need a valid HEAD
 295         * or is_git_directory() will reject the directory. Any value which
 296         * looks like an object ID will do since it will be immediately
 297         * replaced by the symbolic-ref or update-ref invocation in the new
 298         * worktree.
 299         */
 300        strbuf_reset(&sb);
 301        strbuf_addf(&sb, "%s/HEAD", sb_repo.buf);
 302        write_file(sb.buf, "%s", sha1_to_hex(null_sha1));
 303        strbuf_reset(&sb);
 304        strbuf_addf(&sb, "%s/commondir", sb_repo.buf);
 305        write_file(sb.buf, "../..");
 306
 307        fprintf_ln(stderr, _("Preparing %s (identifier %s)"), path, name);
 308
 309        argv_array_pushf(&child_env, "%s=%s", GIT_DIR_ENVIRONMENT, sb_git.buf);
 310        argv_array_pushf(&child_env, "%s=%s", GIT_WORK_TREE_ENVIRONMENT, path);
 311        cp.git_cmd = 1;
 312
 313        if (!is_branch)
 314                argv_array_pushl(&cp.args, "update-ref", "HEAD",
 315                                 oid_to_hex(&commit->object.oid), NULL);
 316        else
 317                argv_array_pushl(&cp.args, "symbolic-ref", "HEAD",
 318                                 symref.buf, NULL);
 319        cp.env = child_env.argv;
 320        ret = run_command(&cp);
 321        if (ret)
 322                goto done;
 323
 324        if (opts->checkout) {
 325                cp.argv = NULL;
 326                argv_array_clear(&cp.args);
 327                argv_array_pushl(&cp.args, "reset", "--hard", NULL);
 328                cp.env = child_env.argv;
 329                ret = run_command(&cp);
 330                if (ret)
 331                        goto done;
 332        }
 333
 334        is_junk = 0;
 335        FREE_AND_NULL(junk_work_tree);
 336        FREE_AND_NULL(junk_git_dir);
 337
 338done:
 339        if (ret || !opts->keep_locked) {
 340                strbuf_reset(&sb);
 341                strbuf_addf(&sb, "%s/locked", sb_repo.buf);
 342                unlink_or_warn(sb.buf);
 343        }
 344
 345        /*
 346         * Hook failure does not warrant worktree deletion, so run hook after
 347         * is_junk is cleared, but do return appropriate code when hook fails.
 348         */
 349        if (!ret && opts->checkout)
 350                ret = run_hook_le(NULL, "post-checkout", oid_to_hex(&null_oid),
 351                                  oid_to_hex(&commit->object.oid), "1", NULL);
 352
 353        argv_array_clear(&child_env);
 354        strbuf_release(&sb);
 355        strbuf_release(&symref);
 356        strbuf_release(&sb_repo);
 357        strbuf_release(&sb_git);
 358        return ret;
 359}
 360
 361static int add(int ac, const char **av, const char *prefix)
 362{
 363        struct add_opts opts;
 364        const char *new_branch_force = NULL;
 365        char *path;
 366        const char *branch;
 367        const char *opt_track = NULL;
 368        struct option options[] = {
 369                OPT__FORCE(&opts.force, N_("checkout <branch> even if already checked out in other worktree")),
 370                OPT_STRING('b', NULL, &opts.new_branch, N_("branch"),
 371                           N_("create a new branch")),
 372                OPT_STRING('B', NULL, &new_branch_force, N_("branch"),
 373                           N_("create or reset a branch")),
 374                OPT_BOOL(0, "detach", &opts.detach, N_("detach HEAD at named commit")),
 375                OPT_BOOL(0, "checkout", &opts.checkout, N_("populate the new working tree")),
 376                OPT_BOOL(0, "lock", &opts.keep_locked, N_("keep the new working tree locked")),
 377                OPT_PASSTHRU(0, "track", &opt_track, NULL,
 378                             N_("set up tracking mode (see git-branch(1))"),
 379                             PARSE_OPT_NOARG | PARSE_OPT_OPTARG),
 380                OPT_BOOL(0, "guess-remote", &guess_remote,
 381                         N_("try to match the new branch name with a remote-tracking branch")),
 382                OPT_END()
 383        };
 384
 385        memset(&opts, 0, sizeof(opts));
 386        opts.checkout = 1;
 387        ac = parse_options(ac, av, prefix, options, worktree_usage, 0);
 388        if (!!opts.detach + !!opts.new_branch + !!new_branch_force > 1)
 389                die(_("-b, -B, and --detach are mutually exclusive"));
 390        if (ac < 1 || ac > 2)
 391                usage_with_options(worktree_usage, options);
 392
 393        path = prefix_filename(prefix, av[0]);
 394        branch = ac < 2 ? "HEAD" : av[1];
 395
 396        if (!strcmp(branch, "-"))
 397                branch = "@{-1}";
 398
 399        opts.force_new_branch = !!new_branch_force;
 400        if (opts.force_new_branch) {
 401                struct strbuf symref = STRBUF_INIT;
 402
 403                opts.new_branch = new_branch_force;
 404
 405                if (!opts.force &&
 406                    !strbuf_check_branch_ref(&symref, opts.new_branch) &&
 407                    ref_exists(symref.buf))
 408                        die_if_checked_out(symref.buf, 0);
 409                strbuf_release(&symref);
 410        }
 411
 412        if (ac < 2 && !opts.new_branch && !opts.detach) {
 413                int n;
 414                const char *s = worktree_basename(path, &n);
 415                opts.new_branch = xstrndup(s, n);
 416                if (guess_remote) {
 417                        struct object_id oid;
 418                        const char *remote =
 419                                unique_tracking_name(opts.new_branch, &oid);
 420                        if (remote)
 421                                branch = remote;
 422                }
 423        }
 424
 425        if (ac == 2 && !opts.new_branch && !opts.detach) {
 426                struct object_id oid;
 427                struct commit *commit;
 428                const char *remote;
 429
 430                commit = lookup_commit_reference_by_name(branch);
 431                if (!commit) {
 432                        remote = unique_tracking_name(branch, &oid);
 433                        if (remote) {
 434                                opts.new_branch = branch;
 435                                branch = remote;
 436                        }
 437                }
 438        }
 439
 440        if (opts.new_branch) {
 441                struct child_process cp = CHILD_PROCESS_INIT;
 442                cp.git_cmd = 1;
 443                argv_array_push(&cp.args, "branch");
 444                if (opts.force_new_branch)
 445                        argv_array_push(&cp.args, "--force");
 446                argv_array_push(&cp.args, opts.new_branch);
 447                argv_array_push(&cp.args, branch);
 448                if (opt_track)
 449                        argv_array_push(&cp.args, opt_track);
 450                if (run_command(&cp))
 451                        return -1;
 452                branch = opts.new_branch;
 453        } else if (opt_track) {
 454                die(_("--[no-]track can only be used if a new branch is created"));
 455        }
 456
 457        UNLEAK(path);
 458        UNLEAK(opts);
 459        return add_worktree(path, branch, &opts);
 460}
 461
 462static void show_worktree_porcelain(struct worktree *wt)
 463{
 464        printf("worktree %s\n", wt->path);
 465        if (wt->is_bare)
 466                printf("bare\n");
 467        else {
 468                printf("HEAD %s\n", oid_to_hex(&wt->head_oid));
 469                if (wt->is_detached)
 470                        printf("detached\n");
 471                else if (wt->head_ref)
 472                        printf("branch %s\n", wt->head_ref);
 473        }
 474        printf("\n");
 475}
 476
 477static void show_worktree(struct worktree *wt, int path_maxlen, int abbrev_len)
 478{
 479        struct strbuf sb = STRBUF_INIT;
 480        int cur_path_len = strlen(wt->path);
 481        int path_adj = cur_path_len - utf8_strwidth(wt->path);
 482
 483        strbuf_addf(&sb, "%-*s ", 1 + path_maxlen + path_adj, wt->path);
 484        if (wt->is_bare)
 485                strbuf_addstr(&sb, "(bare)");
 486        else {
 487                strbuf_addf(&sb, "%-*s ", abbrev_len,
 488                                find_unique_abbrev(wt->head_oid.hash, DEFAULT_ABBREV));
 489                if (wt->is_detached)
 490                        strbuf_addstr(&sb, "(detached HEAD)");
 491                else if (wt->head_ref) {
 492                        char *ref = shorten_unambiguous_ref(wt->head_ref, 0);
 493                        strbuf_addf(&sb, "[%s]", ref);
 494                        free(ref);
 495                } else
 496                        strbuf_addstr(&sb, "(error)");
 497        }
 498        printf("%s\n", sb.buf);
 499
 500        strbuf_release(&sb);
 501}
 502
 503static void measure_widths(struct worktree **wt, int *abbrev, int *maxlen)
 504{
 505        int i;
 506
 507        for (i = 0; wt[i]; i++) {
 508                int sha1_len;
 509                int path_len = strlen(wt[i]->path);
 510
 511                if (path_len > *maxlen)
 512                        *maxlen = path_len;
 513                sha1_len = strlen(find_unique_abbrev(wt[i]->head_oid.hash, *abbrev));
 514                if (sha1_len > *abbrev)
 515                        *abbrev = sha1_len;
 516        }
 517}
 518
 519static int list(int ac, const char **av, const char *prefix)
 520{
 521        int porcelain = 0;
 522
 523        struct option options[] = {
 524                OPT_BOOL(0, "porcelain", &porcelain, N_("machine-readable output")),
 525                OPT_END()
 526        };
 527
 528        ac = parse_options(ac, av, prefix, options, worktree_usage, 0);
 529        if (ac)
 530                usage_with_options(worktree_usage, options);
 531        else {
 532                struct worktree **worktrees = get_worktrees(GWT_SORT_LINKED);
 533                int path_maxlen = 0, abbrev = DEFAULT_ABBREV, i;
 534
 535                if (!porcelain)
 536                        measure_widths(worktrees, &abbrev, &path_maxlen);
 537
 538                for (i = 0; worktrees[i]; i++) {
 539                        if (porcelain)
 540                                show_worktree_porcelain(worktrees[i]);
 541                        else
 542                                show_worktree(worktrees[i], path_maxlen, abbrev);
 543                }
 544                free_worktrees(worktrees);
 545        }
 546        return 0;
 547}
 548
 549static int lock_worktree(int ac, const char **av, const char *prefix)
 550{
 551        const char *reason = "", *old_reason;
 552        struct option options[] = {
 553                OPT_STRING(0, "reason", &reason, N_("string"),
 554                           N_("reason for locking")),
 555                OPT_END()
 556        };
 557        struct worktree **worktrees, *wt;
 558
 559        ac = parse_options(ac, av, prefix, options, worktree_usage, 0);
 560        if (ac != 1)
 561                usage_with_options(worktree_usage, options);
 562
 563        worktrees = get_worktrees(0);
 564        wt = find_worktree(worktrees, prefix, av[0]);
 565        if (!wt)
 566                die(_("'%s' is not a working tree"), av[0]);
 567        if (is_main_worktree(wt))
 568                die(_("The main working tree cannot be locked or unlocked"));
 569
 570        old_reason = is_worktree_locked(wt);
 571        if (old_reason) {
 572                if (*old_reason)
 573                        die(_("'%s' is already locked, reason: %s"),
 574                            av[0], old_reason);
 575                die(_("'%s' is already locked"), av[0]);
 576        }
 577
 578        write_file(git_common_path("worktrees/%s/locked", wt->id),
 579                   "%s", reason);
 580        free_worktrees(worktrees);
 581        return 0;
 582}
 583
 584static int unlock_worktree(int ac, const char **av, const char *prefix)
 585{
 586        struct option options[] = {
 587                OPT_END()
 588        };
 589        struct worktree **worktrees, *wt;
 590        int ret;
 591
 592        ac = parse_options(ac, av, prefix, options, worktree_usage, 0);
 593        if (ac != 1)
 594                usage_with_options(worktree_usage, options);
 595
 596        worktrees = get_worktrees(0);
 597        wt = find_worktree(worktrees, prefix, av[0]);
 598        if (!wt)
 599                die(_("'%s' is not a working tree"), av[0]);
 600        if (is_main_worktree(wt))
 601                die(_("The main working tree cannot be locked or unlocked"));
 602        if (!is_worktree_locked(wt))
 603                die(_("'%s' is not locked"), av[0]);
 604        ret = unlink_or_warn(git_common_path("worktrees/%s/locked", wt->id));
 605        free_worktrees(worktrees);
 606        return ret;
 607}
 608
 609static int move_worktree(int ac, const char **av, const char *prefix)
 610{
 611        struct option options[] = {
 612                OPT_END()
 613        };
 614        struct worktree **worktrees, *wt;
 615        struct strbuf dst = STRBUF_INIT;
 616        struct strbuf errmsg = STRBUF_INIT;
 617        const char *reason;
 618        char *path;
 619
 620        ac = parse_options(ac, av, prefix, options, worktree_usage, 0);
 621        if (ac != 2)
 622                usage_with_options(worktree_usage, options);
 623
 624        path = prefix_filename(prefix, av[1]);
 625        strbuf_addstr(&dst, path);
 626        free(path);
 627
 628        worktrees = get_worktrees(0);
 629        wt = find_worktree(worktrees, prefix, av[0]);
 630        if (!wt)
 631                die(_("'%s' is not a working tree"), av[0]);
 632        if (is_main_worktree(wt))
 633                die(_("'%s' is a main working tree"), av[0]);
 634        if (is_directory(dst.buf)) {
 635                const char *sep = find_last_dir_sep(wt->path);
 636
 637                if (!sep)
 638                        die(_("could not figure out destination name from '%s'"),
 639                            wt->path);
 640                strbuf_trim_trailing_dir_sep(&dst);
 641                strbuf_addstr(&dst, sep);
 642        }
 643        if (file_exists(dst.buf))
 644                die(_("target '%s' already exists"), dst.buf);
 645
 646        reason = is_worktree_locked(wt);
 647        if (reason) {
 648                if (*reason)
 649                        die(_("cannot move a locked working tree, lock reason: %s"),
 650                            reason);
 651                die(_("cannot move a locked working tree"));
 652        }
 653        if (validate_worktree(wt, &errmsg))
 654                die(_("validation failed, cannot move working tree: %s"),
 655                    errmsg.buf);
 656        strbuf_release(&errmsg);
 657
 658        if (rename(wt->path, dst.buf) == -1)
 659                die_errno(_("failed to move '%s' to '%s'"), wt->path, dst.buf);
 660
 661        update_worktree_location(wt, dst.buf);
 662
 663        strbuf_release(&dst);
 664        free_worktrees(worktrees);
 665        return 0;
 666}
 667
 668int cmd_worktree(int ac, const char **av, const char *prefix)
 669{
 670        struct option options[] = {
 671                OPT_END()
 672        };
 673
 674        git_config(git_worktree_config, NULL);
 675
 676        if (ac < 2)
 677                usage_with_options(worktree_usage, options);
 678        if (!prefix)
 679                prefix = "";
 680        if (!strcmp(av[1], "add"))
 681                return add(ac - 1, av + 1, prefix);
 682        if (!strcmp(av[1], "prune"))
 683                return prune(ac - 1, av + 1, prefix);
 684        if (!strcmp(av[1], "list"))
 685                return list(ac - 1, av + 1, prefix);
 686        if (!strcmp(av[1], "lock"))
 687                return lock_worktree(ac - 1, av + 1, prefix);
 688        if (!strcmp(av[1], "unlock"))
 689                return unlock_worktree(ac - 1, av + 1, prefix);
 690        if (!strcmp(av[1], "move"))
 691                return move_worktree(ac - 1, av + 1, prefix);
 692        usage_with_options(worktree_usage, options);
 693}