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