git.oblomov.eu Git - git/blob - builtin/worktree.c

   1 #include "cache.h"
   2 #include "builtin.h"
   3 #include "dir.h"
   4 #include "parse-options.h"
   5 #include "argv-array.h"
   6 #include "branch.h"
   7 #include "refs.h"
   8 #include "run-command.h"
   9 #include "sigchain.h"
  10 #include "refs.h"
  11 #include "utf8.h"
  12 #include "worktree.h"
  13
  14 static const char * const worktree_usage[] = {
  15         N_("git worktree add [<options>] <path> [<branch>]"),
  16         N_("git worktree list [<options>]"),
  17         N_("git worktree lock [<options>] <path>"),
  18         N_("git worktree move [<options>] <oldpath> <newpath>"),
  19         N_("git worktree prune [<options>]"),
  20         N_("git worktree unlock <path>"),
  21         NULL
  22 };
  23
  24 struct add_opts {
  25         int force;
  26         int detach;
  27         int checkout;
  28         const char *new_branch;
  29         int force_new_branch;
  30 };
  31
  32 static int show_only;
  33 static int verbose;
  34 static unsigned long expire;
  35
  36 static int prune_worktree(const char *id, struct strbuf *reason)
  37 {
  38         struct stat st;
  39         char *path;
  40         int fd, len;
  41
  42         if (!is_directory(git_path("worktrees/%s", id))) {
  43                 strbuf_addf(reason, _("Removing worktrees/%s: not a valid directory"), id);
  44                 return 1;
  45         }
  46         if (file_exists(git_path("worktrees/%s/locked", id)))
  47                 return 0;
  48         if (stat(git_path("worktrees/%s/gitdir", id), &st)) {
  49                 strbuf_addf(reason, _("Removing worktrees/%s: gitdir file does not exist"), id);
  50                 return 1;
  51         }
  52         fd = open(git_path("worktrees/%s/gitdir", id), O_RDONLY);
  53         if (fd < 0) {
  54                 strbuf_addf(reason, _("Removing worktrees/%s: unable to read gitdir file (%s)"),
  55                             id, strerror(errno));
  56                 return 1;
  57         }
  58         len = st.st_size;
  59         path = xmallocz(len);
  60         read_in_full(fd, path, len);
  61         close(fd);
  62         while (len && (path[len - 1] == '\n' || path[len - 1] == '\r'))
  63                 len--;
  64         if (!len) {
  65                 strbuf_addf(reason, _("Removing worktrees/%s: invalid gitdir file"), id);
  66                 free(path);
  67                 return 1;
  68         }
  69         path[len] = '\0';
  70         if (!file_exists(path)) {
  71                 struct stat st_link;
  72                 free(path);
  73                 /*
  74                  * the repo is moved manually and has not been
  75                  * accessed since?
  76                  */
  77                 if (!stat(git_path("worktrees/%s/link", id), &st_link) &&
  78                     st_link.st_nlink > 1)
  79                         return 0;
  80                 if (st.st_mtime <= expire) {
  81                         strbuf_addf(reason, _("Removing worktrees/%s: gitdir file points to non-existent location"), id);
  82                         return 1;
  83                 } else {
  84                         return 0;
  85                 }
  86         }
  87         free(path);
  88         return 0;
  89 }
  90
  91 static void prune_worktrees(void)
  92 {
  93         struct strbuf reason = STRBUF_INIT;
  94         struct strbuf path = STRBUF_INIT;
  95         DIR *dir = opendir(git_path("worktrees"));
  96         struct dirent *d;
  97         int ret;
  98         if (!dir)
  99                 return;
 100         while ((d = readdir(dir)) != NULL) {
 101                 if (is_dot_or_dotdot(d->d_name))
 102                         continue;
 103                 strbuf_reset(&reason);
 104                 if (!prune_worktree(d->d_name, &reason))
 105                         continue;
 106                 if (show_only || verbose)
 107                         printf("%s\n", reason.buf);
 108                 if (show_only)
 109                         continue;
 110                 strbuf_reset(&path);
 111                 strbuf_addstr(&path, git_path("worktrees/%s", d->d_name));
 112                 ret = remove_dir_recursively(&path, 0);
 113                 if (ret < 0 && errno == ENOTDIR)
 114                         ret = unlink(path.buf);
 115                 if (ret)
 116                         error_errno(_("failed to remove '%s'"), path.buf);
 117         }
 118         closedir(dir);
 119         if (!show_only)
 120                 rmdir(git_path("worktrees"));
 121         strbuf_release(&reason);
 122         strbuf_release(&path);
 123 }
 124
 125 static int prune(int ac, const char **av, const char *prefix)
 126 {
 127         struct option options[] = {
 128                 OPT__DRY_RUN(&show_only, N_("do not remove, show only")),
 129                 OPT__VERBOSE(&verbose, N_("report pruned working trees")),
 130                 OPT_EXPIRY_DATE(0, "expire", &expire,
 131                                 N_("expire working trees older than <time>")),
 132                 OPT_END()
 133         };
 134
 135         expire = ULONG_MAX;
 136         ac = parse_options(ac, av, prefix, options, worktree_usage, 0);
 137         if (ac)
 138                 usage_with_options(worktree_usage, options);
 139         prune_worktrees();
 140         return 0;
 141 }
 142
 143 static char *junk_work_tree;
 144 static char *junk_git_dir;
 145 static int is_junk;
 146 static pid_t junk_pid;
 147
 148 static void remove_junk(void)
 149 {
 150         struct strbuf sb = STRBUF_INIT;
 151         if (!is_junk || getpid() != junk_pid)
 152                 return;
 153         if (junk_git_dir) {
 154                 strbuf_addstr(&sb, junk_git_dir);
 155                 remove_dir_recursively(&sb, 0);
 156                 strbuf_reset(&sb);
 157         }
 158         if (junk_work_tree) {
 159                 strbuf_addstr(&sb, junk_work_tree);
 160                 remove_dir_recursively(&sb, 0);
 161         }
 162         strbuf_release(&sb);
 163 }
 164
 165 static void remove_junk_on_signal(int signo)
 166 {
 167         remove_junk();
 168         sigchain_pop(signo);
 169         raise(signo);
 170 }
 171
 172 static const char *worktree_basename(const char *path, int *olen)
 173 {
 174         const char *name;
 175         int len;
 176
 177         len = strlen(path);
 178         while (len && is_dir_sep(path[len - 1]))
 179                 len--;
 180
 181         for (name = path + len - 1; name > path; name--)
 182                 if (is_dir_sep(*name)) {
 183                         name++;
 184                         break;
 185                 }
 186
 187         *olen = len;
 188         return name;
 189 }
 190
 191 static int add_worktree(const char *path, const char *refname,
 192                         const struct add_opts *opts)
 193 {
 194         struct strbuf sb_git = STRBUF_INIT, sb_repo = STRBUF_INIT;
 195         struct strbuf sb = STRBUF_INIT;
 196         const char *name;
 197         struct stat st;
 198         struct child_process cp = CHILD_PROCESS_INIT;
 199         struct argv_array child_env = ARGV_ARRAY_INIT;
 200         int counter = 0, len, ret;
 201         struct strbuf symref = STRBUF_INIT;
 202         struct commit *commit = NULL;
 203
 204         if (file_exists(path) && !is_empty_dir(path))
 205                 die(_("'%s' already exists"), path);
 206
 207         /* is 'refname' a branch or commit? */
 208         if (!opts->detach && !strbuf_check_branch_ref(&symref, refname) &&
 209                  ref_exists(symref.buf)) { /* it's a branch */
 210                 if (!opts->force)
 211                         die_if_checked_out(symref.buf, 0);
 212         } else { /* must be a commit */
 213                 commit = lookup_commit_reference_by_name(refname);
 214                 if (!commit)
 215                         die(_("invalid reference: %s"), refname);
 216         }
 217
 218         name = worktree_basename(path, &len);
 219         strbuf_addstr(&sb_repo,
 220                       git_path("worktrees/%.*s", (int)(path + len - name), name));
 221         len = sb_repo.len;
 222         if (safe_create_leading_directories_const(sb_repo.buf))
 223                 die_errno(_("could not create leading directories of '%s'"),
 224                           sb_repo.buf);
 225         while (!stat(sb_repo.buf, &st)) {
 226                 counter++;
 227                 strbuf_setlen(&sb_repo, len);
 228                 strbuf_addf(&sb_repo, "%d", counter);
 229         }
 230         name = strrchr(sb_repo.buf, '/') + 1;
 231
 232         junk_pid = getpid();
 233         atexit(remove_junk);
 234         sigchain_push_common(remove_junk_on_signal);
 235
 236         if (mkdir(sb_repo.buf, 0777))
 237                 die_errno(_("could not create directory of '%s'"), sb_repo.buf);
 238         junk_git_dir = xstrdup(sb_repo.buf);
 239         is_junk = 1;
 240
 241         /*
 242          * lock the incomplete repo so prune won't delete it, unlock
 243          * after the preparation is over.
 244          */
 245         strbuf_addf(&sb, "%s/locked", sb_repo.buf);
 246         write_file(sb.buf, "initializing");
 247
 248         strbuf_addf(&sb_git, "%s/.git", path);
 249         if (safe_create_leading_directories_const(sb_git.buf))
 250                 die_errno(_("could not create leading directories of '%s'"),
 251                           sb_git.buf);
 252         junk_work_tree = xstrdup(path);
 253
 254         strbuf_reset(&sb);
 255         strbuf_addf(&sb, "%s/gitdir", sb_repo.buf);
 256         write_file(sb.buf, "%s", real_path(sb_git.buf));
 257         write_file(sb_git.buf, "gitdir: %s/worktrees/%s",
 258                    real_path(get_git_common_dir()), name);
 259         /*
 260          * This is to keep resolve_ref() happy. We need a valid HEAD
 261          * or is_git_directory() will reject the directory. Any value which
 262          * looks like an object ID will do since it will be immediately
 263          * replaced by the symbolic-ref or update-ref invocation in the new
 264          * worktree.
 265          */
 266         strbuf_reset(&sb);
 267         strbuf_addf(&sb, "%s/HEAD", sb_repo.buf);
 268         write_file(sb.buf, "%s", sha1_to_hex(null_sha1));
 269         strbuf_reset(&sb);
 270         strbuf_addf(&sb, "%s/commondir", sb_repo.buf);
 271         write_file(sb.buf, "../..");
 272
 273         fprintf_ln(stderr, _("Preparing %s (identifier %s)"), path, name);
 274
 275         argv_array_pushf(&child_env, "%s=%s", GIT_DIR_ENVIRONMENT, sb_git.buf);
 276         argv_array_pushf(&child_env, "%s=%s", GIT_WORK_TREE_ENVIRONMENT, path);
 277         cp.git_cmd = 1;
 278
 279         if (commit)
 280                 argv_array_pushl(&cp.args, "update-ref", "HEAD",
 281                                  oid_to_hex(&commit->object.oid), NULL);
 282         else
 283                 argv_array_pushl(&cp.args, "symbolic-ref", "HEAD",
 284                                  symref.buf, NULL);
 285         cp.env = child_env.argv;
 286         ret = run_command(&cp);
 287         if (ret)
 288                 goto done;
 289
 290         if (opts->checkout) {
 291                 cp.argv = NULL;
 292                 argv_array_clear(&cp.args);
 293                 argv_array_pushl(&cp.args, "reset", "--hard", NULL);
 294                 cp.env = child_env.argv;
 295                 ret = run_command(&cp);
 296                 if (ret)
 297                         goto done;
 298         }
 299
 300         is_junk = 0;
 301         free(junk_work_tree);
 302         free(junk_git_dir);
 303         junk_work_tree = NULL;
 304         junk_git_dir = NULL;
 305
 306 done:
 307         strbuf_reset(&sb);
 308         strbuf_addf(&sb, "%s/locked", sb_repo.buf);
 309         unlink_or_warn(sb.buf);
 310         argv_array_clear(&child_env);
 311         strbuf_release(&sb);
 312         strbuf_release(&symref);
 313         strbuf_release(&sb_repo);
 314         strbuf_release(&sb_git);
 315         return ret;
 316 }
 317
 318 static int add(int ac, const char **av, const char *prefix)
 319 {
 320         struct add_opts opts;
 321         const char *new_branch_force = NULL;
 322         char *path;
 323         const char *branch;
 324         struct option options[] = {
 325                 OPT__FORCE(&opts.force, N_("checkout <branch> even if already checked out in other worktree")),
 326                 OPT_STRING('b', NULL, &opts.new_branch, N_("branch"),
 327                            N_("create a new branch")),
 328                 OPT_STRING('B', NULL, &new_branch_force, N_("branch"),
 329                            N_("create or reset a branch")),
 330                 OPT_BOOL(0, "detach", &opts.detach, N_("detach HEAD at named commit")),
 331                 OPT_BOOL(0, "checkout", &opts.checkout, N_("populate the new working tree")),
 332                 OPT_END()
 333         };
 334
 335         memset(&opts, 0, sizeof(opts));
 336         opts.checkout = 1;
 337         ac = parse_options(ac, av, prefix, options, worktree_usage, 0);
 338         if (!!opts.detach + !!opts.new_branch + !!new_branch_force > 1)
 339                 die(_("-b, -B, and --detach are mutually exclusive"));
 340         if (ac < 1 || ac > 2)
 341                 usage_with_options(worktree_usage, options);
 342
 343         path = prefix_filename(prefix, av[0]);
 344         branch = ac < 2 ? "HEAD" : av[1];
 345
 346         if (!strcmp(branch, "-"))
 347                 branch = "@{-1}";
 348
 349         opts.force_new_branch = !!new_branch_force;
 350         if (opts.force_new_branch) {
 351                 struct strbuf symref = STRBUF_INIT;
 352
 353                 opts.new_branch = new_branch_force;
 354
 355                 if (!opts.force &&
 356                     !strbuf_check_branch_ref(&symref, opts.new_branch) &&
 357                     ref_exists(symref.buf))
 358                         die_if_checked_out(symref.buf, 0);
 359                 strbuf_release(&symref);
 360         }
 361
 362         if (ac < 2 && !opts.new_branch && !opts.detach) {
 363                 int n;
 364                 const char *s = worktree_basename(path, &n);
 365                 opts.new_branch = xstrndup(s, n);
 366         }
 367
 368         if (opts.new_branch) {
 369                 struct child_process cp = CHILD_PROCESS_INIT;
 370                 cp.git_cmd = 1;
 371                 argv_array_push(&cp.args, "branch");
 372                 if (opts.force_new_branch)
 373                         argv_array_push(&cp.args, "--force");
 374                 argv_array_push(&cp.args, opts.new_branch);
 375                 argv_array_push(&cp.args, branch);
 376                 if (run_command(&cp))
 377                         return -1;
 378                 branch = opts.new_branch;
 379         }
 380
 381         return add_worktree(path, branch, &opts);
 382 }
 383
 384 static void show_worktree_porcelain(struct worktree *wt)
 385 {
 386         printf("worktree %s\n", wt->path);
 387         if (wt->is_bare)
 388                 printf("bare\n");
 389         else {
 390                 printf("HEAD %s\n", sha1_to_hex(wt->head_sha1));
 391                 if (wt->is_detached)
 392                         printf("detached\n");
 393                 else if (wt->head_ref)
 394                         printf("branch %s\n", wt->head_ref);
 395         }
 396         printf("\n");
 397 }
 398
 399 static void show_worktree(struct worktree *wt, int path_maxlen, int abbrev_len)
 400 {
 401         struct strbuf sb = STRBUF_INIT;
 402         int cur_path_len = strlen(wt->path);
 403         int path_adj = cur_path_len - utf8_strwidth(wt->path);
 404
 405         strbuf_addf(&sb, "%-*s ", 1 + path_maxlen + path_adj, wt->path);
 406         if (wt->is_bare)
 407                 strbuf_addstr(&sb, "(bare)");
 408         else {
 409                 strbuf_addf(&sb, "%-*s ", abbrev_len,
 410                                 find_unique_abbrev(wt->head_sha1, DEFAULT_ABBREV));
 411                 if (wt->is_detached)
 412                         strbuf_addstr(&sb, "(detached HEAD)");
 413                 else if (wt->head_ref)
 414                         strbuf_addf(&sb, "[%s]", shorten_unambiguous_ref(wt->head_ref, 0));
 415                 else
 416                         strbuf_addstr(&sb, "(error)");
 417         }
 418         printf("%s\n", sb.buf);
 419
 420         strbuf_release(&sb);
 421 }
 422
 423 static void measure_widths(struct worktree **wt, int *abbrev, int *maxlen)
 424 {
 425         int i;
 426
 427         for (i = 0; wt[i]; i++) {
 428                 int sha1_len;
 429                 int path_len = strlen(wt[i]->path);
 430
 431                 if (path_len > *maxlen)
 432                         *maxlen = path_len;
 433                 sha1_len = strlen(find_unique_abbrev(wt[i]->head_sha1, *abbrev));
 434                 if (sha1_len > *abbrev)
 435                         *abbrev = sha1_len;
 436         }
 437 }
 438
 439 static int list(int ac, const char **av, const char *prefix)
 440 {
 441         int porcelain = 0;
 442
 443         struct option options[] = {
 444                 OPT_BOOL(0, "porcelain", &porcelain, N_("machine-readable output")),
 445                 OPT_END()
 446         };
 447
 448         ac = parse_options(ac, av, prefix, options, worktree_usage, 0);
 449         if (ac)
 450                 usage_with_options(worktree_usage, options);
 451         else {
 452                 struct worktree **worktrees = get_worktrees(GWT_SORT_LINKED);
 453                 int path_maxlen = 0, abbrev = DEFAULT_ABBREV, i;
 454
 455                 if (!porcelain)
 456                         measure_widths(worktrees, &abbrev, &path_maxlen);
 457
 458                 for (i = 0; worktrees[i]; i++) {
 459                         if (porcelain)
 460                                 show_worktree_porcelain(worktrees[i]);
 461                         else
 462                                 show_worktree(worktrees[i], path_maxlen, abbrev);
 463                 }
 464                 free_worktrees(worktrees);
 465         }
 466         return 0;
 467 }
 468
 469 static int lock_worktree(int ac, const char **av, const char *prefix)
 470 {
 471         const char *reason = "", *old_reason;
 472         struct option options[] = {
 473                 OPT_STRING(0, "reason", &reason, N_("string"),
 474                            N_("reason for locking")),
 475                 OPT_END()
 476         };
 477         struct worktree **worktrees, *wt;
 478
 479         ac = parse_options(ac, av, prefix, options, worktree_usage, 0);
 480         if (ac != 1)
 481                 usage_with_options(worktree_usage, options);
 482
 483         worktrees = get_worktrees(0);
 484         wt = find_worktree(worktrees, prefix, av[0]);
 485         if (!wt)
 486                 die(_("'%s' is not a working tree"), av[0]);
 487         if (is_main_worktree(wt))
 488                 die(_("The main working tree cannot be locked or unlocked"));
 489
 490         old_reason = is_worktree_locked(wt);
 491         if (old_reason) {
 492                 if (*old_reason)
 493                         die(_("'%s' is already locked, reason: %s"),
 494                             av[0], old_reason);
 495                 die(_("'%s' is already locked"), av[0]);
 496         }
 497
 498         write_file(git_common_path("worktrees/%s/locked", wt->id),
 499                    "%s", reason);
 500         free_worktrees(worktrees);
 501         return 0;
 502 }
 503
 504 static int unlock_worktree(int ac, const char **av, const char *prefix)
 505 {
 506         struct option options[] = {
 507                 OPT_END()
 508         };
 509         struct worktree **worktrees, *wt;
 510         int ret;
 511
 512         ac = parse_options(ac, av, prefix, options, worktree_usage, 0);
 513         if (ac != 1)
 514                 usage_with_options(worktree_usage, options);
 515
 516         worktrees = get_worktrees(0);
 517         wt = find_worktree(worktrees, prefix, av[0]);
 518         if (!wt)
 519                 die(_("'%s' is not a working tree"), av[0]);
 520         if (is_main_worktree(wt))
 521                 die(_("The main working tree cannot be locked or unlocked"));
 522         if (!is_worktree_locked(wt))
 523                 die(_("'%s' is not locked"), av[0]);
 524         ret = unlink_or_warn(git_common_path("worktrees/%s/locked", wt->id));
 525         free_worktrees(worktrees);
 526         return ret;
 527 }
 528
 529 static int move_worktree(int ac, const char **av, const char *prefix)
 530 {
 531         const char *lock_reason;
 532         struct option options[] = {
 533                 OPT__DRY_RUN(&show_only, N_("do not move, show only")),
 534                 OPT_END()
 535         };
 536         struct worktree **worktrees, *wt;
 537         char *path = NULL;
 538         const char *name;
 539         struct strbuf sb_path = STRBUF_INIT;
 540         int len, ret = 0, ret2 = 0;
 541
 542         ac = parse_options(ac, av, prefix, options, worktree_usage, 0);
 543         if (ac != 2)
 544                 usage_with_options(worktree_usage, options);
 545
 546         worktrees = get_worktrees(0);
 547
 548         wt = find_worktree(worktrees, prefix, av[1]);
 549         if (wt)
 550                 die(_("worktree '%s' exists already"), av[1]);
 551
 552         path = prefix_filename(prefix, av[1]);
 553         if (file_exists(path))
 554                 die(_("'%s' already exists"), path);
 555
 556         name = worktree_basename(path, &len);
 557         strbuf_add_real_path(&sb_path, path);
 558
 559         wt = find_worktree(worktrees, prefix, av[0]);
 560         if (!wt)
 561                 die(_("'%s' is not a working tree"), av[0]);
 562         /* Moving the main worktree could potentially be doable by changing all
 563          * references from the associated worktrees too, but we don't support
 564          * it presently */
 565         if (is_main_worktree(wt))
 566                 die(_("The main working tree cannot be moved"));
 567
 568         lock_reason = is_worktree_locked(wt);
 569         if (lock_reason) {
 570                 if (*lock_reason)
 571                         die(_("'%s' is locked, reason: %s"), av[0], lock_reason);
 572                 die(_("'%s' is locked"), av[0]);
 573         }
 574
 575         if (show_only) {
 576                 printf("would lock %s\n", wt->id);
 577         } else {
 578                 struct strbuf sb_lock = STRBUF_INIT;
 579                 strbuf_git_common_path(&sb_lock, "worktrees/%s/locked", wt->id);
 580                 write_file(sb_lock.buf, "moving\nfrom %s\nto %s", wt->path, sb_path.buf);
 581                 strbuf_reset(&sb_lock);
 582         }
 583
 584         if (show_only) {
 585                 printf("would move %s to %s\n", wt->path, sb_path.buf);
 586         } else {
 587                 ret = rename(wt->path, sb_path.buf);
 588                 if (ret)
 589                         ret = errno;
 590         }
 591
 592         if (show_only) {
 593                 printf("would move worktrees/%s to worktrees/%s\n", wt->id, name);
 594         } else {
 595                 if (!ret) {
 596                         struct strbuf wtold = STRBUF_INIT, wtnew = STRBUF_INIT;
 597                         strbuf_git_common_path(&wtold, "worktrees/%s", wt->id);
 598                         strbuf_git_common_path(&wtnew, "worktrees/%s", name);
 599                         ret = rename(wtold.buf, wtnew.buf);
 600                         if (ret)
 601                                 ret = errno;
 602                         else {
 603                                 free(wt->id);
 604                                 wt->id = xstrdup(name);
 605                         }
 606                         strbuf_reset(&wtold);
 607                         strbuf_reset(&wtnew);
 608                 }
 609         }
 610
 611         if (show_only) {
 612                 printf("would fixup gitdir for %s", wt->id);
 613         } else {
 614                 if (!ret) {
 615                         struct strbuf sb_gitdir = STRBUF_INIT,
 616                                 sb_git = STRBUF_INIT,
 617                                 sb_real_git = STRBUF_INIT;
 618                         strbuf_git_common_path(&sb_gitdir, "worktrees/%s/gitdir", wt->id);
 619                         strbuf_addf(&sb_git, "%s/.git", sb_path.buf);
 620                         strbuf_add_real_path(&sb_real_git, sb_gitdir.buf);
 621                         strbuf_remove(&sb_real_git, sb_real_git.len - 7, 7);
 622
 623                         write_file(sb_gitdir.buf, "%s", sb_git.buf);
 624                         write_file(sb_git.buf, "gitdir: %s", sb_real_git.buf);
 625
 626                         strbuf_reset(&sb_real_git);
 627                         strbuf_reset(&sb_git);
 628                         strbuf_reset(&sb_gitdir);
 629                 }
 630         }
 631
 632         if (show_only) {
 633                 printf("would unlock %s\n", wt->id);
 634         } else {
 635                 struct strbuf sb_lock = STRBUF_INIT;
 636                 strbuf_git_common_path(&sb_lock, "worktrees/%s/locked", wt->id);
 637                 ret2 = unlink_or_warn(sb_lock.buf);
 638                 strbuf_reset(&sb_lock);
 639         }
 640
 641         free_worktrees(worktrees);
 642         free(path);
 643
 644         /* return the errno from the failed rename, if any, else the one from the
 645          * unlock */
 646         return ret ? ret : ret2;
 647 }
 648
 649
 650 int cmd_worktree(int ac, const char **av, const char *prefix)
 651 {
 652         struct option options[] = {
 653                 OPT_END()
 654         };
 655
 656         git_config(git_default_config, NULL);
 657
 658         if (ac < 2)
 659                 usage_with_options(worktree_usage, options);
 660         if (!prefix)
 661                 prefix = "";
 662         if (!strcmp(av[1], "add"))
 663                 return add(ac - 1, av + 1, prefix);
 664         if (!strcmp(av[1], "prune"))
 665                 return prune(ac - 1, av + 1, prefix);
 666         if (!strcmp(av[1], "list"))
 667                 return list(ac - 1, av + 1, prefix);
 668         if (!strcmp(av[1], "lock"))
 669                 return lock_worktree(ac - 1, av + 1, prefix);
 670         if (!strcmp(av[1], "move"))
 671                 return move_worktree(ac - 1, av + 1, prefix);
 672         if (!strcmp(av[1], "unlock"))
 673                 return unlock_worktree(ac - 1, av + 1, prefix);
 674         usage_with_options(worktree_usage, options);
 675 }