builtin/worktree.c

   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
  16 static 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
  26 struct 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
  35 static int show_only;
  36 static int verbose;
  37 static int guess_remote;
  38 static timestamp_t expire;
  39
  40 static 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
  50 static 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
 123 static 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
 156 static 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
 174 static char *junk_work_tree;
 175 static char *junk_git_dir;
 176 static int is_junk;
 177 static pid_t junk_pid;
 178
 179 static 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
 196 static void remove_junk_on_signal(int signo)
 197 {
 198         remove_junk();
 199         sigchain_pop(signo);
 200         raise(signo);
 201 }
 202
 203 static 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
 222 static 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
 338 done:
 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
 361 static 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
 462 static 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
 477 static 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
 503 static 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
 519 static 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
 549 static 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
 584 static 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
 609 static void validate_no_submodules(const struct worktree *wt)
 610 {
 611         struct index_state istate = { NULL };
 612         int i, found_submodules = 0;
 613
 614         if (read_index_from(&istate, worktree_git_path(wt, "index")) > 0) {
 615                 for (i = 0; i < istate.cache_nr; i++) {
 616                         struct cache_entry *ce = istate.cache[i];
 617
 618                         if (S_ISGITLINK(ce->ce_mode)) {
 619                                 found_submodules = 1;
 620                                 break;
 621                         }
 622                 }
 623         }
 624         discard_index(&istate);
 625
 626         if (found_submodules)
 627                 die(_("working trees containing submodules cannot be moved"));
 628 }
 629
 630 static int move_worktree(int ac, const char **av, const char *prefix)
 631 {
 632         struct option options[] = {
 633                 OPT_END()
 634         };
 635         struct worktree **worktrees, *wt;
 636         struct strbuf dst = STRBUF_INIT;
 637         struct strbuf errmsg = STRBUF_INIT;
 638         const char *reason;
 639         char *path;
 640
 641         ac = parse_options(ac, av, prefix, options, worktree_usage, 0);
 642         if (ac != 2)
 643                 usage_with_options(worktree_usage, options);
 644
 645         path = prefix_filename(prefix, av[1]);
 646         strbuf_addstr(&dst, path);
 647         free(path);
 648
 649         worktrees = get_worktrees(0);
 650         wt = find_worktree(worktrees, prefix, av[0]);
 651         if (!wt)
 652                 die(_("'%s' is not a working tree"), av[0]);
 653         if (is_main_worktree(wt))
 654                 die(_("'%s' is a main working tree"), av[0]);
 655         if (is_directory(dst.buf)) {
 656                 const char *sep = find_last_dir_sep(wt->path);
 657
 658                 if (!sep)
 659                         die(_("could not figure out destination name from '%s'"),
 660                             wt->path);
 661                 strbuf_trim_trailing_dir_sep(&dst);
 662                 strbuf_addstr(&dst, sep);
 663         }
 664         if (file_exists(dst.buf))
 665                 die(_("target '%s' already exists"), dst.buf);
 666
 667         validate_no_submodules(wt);
 668
 669         reason = is_worktree_locked(wt);
 670         if (reason) {
 671                 if (*reason)
 672                         die(_("cannot move a locked working tree, lock reason: %s"),
 673                             reason);
 674                 die(_("cannot move a locked working tree"));
 675         }
 676         if (validate_worktree(wt, &errmsg))
 677                 die(_("validation failed, cannot move working tree: %s"),
 678                     errmsg.buf);
 679         strbuf_release(&errmsg);
 680
 681         if (rename(wt->path, dst.buf) == -1)
 682                 die_errno(_("failed to move '%s' to '%s'"), wt->path, dst.buf);
 683
 684         update_worktree_location(wt, dst.buf);
 685
 686         strbuf_release(&dst);
 687         free_worktrees(worktrees);
 688         return 0;
 689 }
 690
 691 int cmd_worktree(int ac, const char **av, const char *prefix)
 692 {
 693         struct option options[] = {
 694                 OPT_END()
 695         };
 696
 697         git_config(git_worktree_config, NULL);
 698
 699         if (ac < 2)
 700                 usage_with_options(worktree_usage, options);
 701         if (!prefix)
 702                 prefix = "";
 703         if (!strcmp(av[1], "add"))
 704                 return add(ac - 1, av + 1, prefix);
 705         if (!strcmp(av[1], "prune"))
 706                 return prune(ac - 1, av + 1, prefix);
 707         if (!strcmp(av[1], "list"))
 708                 return list(ac - 1, av + 1, prefix);
 709         if (!strcmp(av[1], "lock"))
 710                 return lock_worktree(ac - 1, av + 1, prefix);
 711         if (!strcmp(av[1], "unlock"))
 712                 return unlock_worktree(ac - 1, av + 1, prefix);
 713         if (!strcmp(av[1], "move"))
 714                 return move_worktree(ac - 1, av + 1, prefix);
 715         usage_with_options(worktree_usage, options);
 716 }