Andrew's git / gitweb.git / builtin/worktree.c
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builtin / worktree.con commit worktree: factor out dwim_branch function (6427f87)
   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 prune [<options>]"),
  21        N_("git worktree unlock <path>"),
  22        NULL
  23};
  24
  25struct add_opts {
  26        int force;
  27        int detach;
  28        int checkout;
  29        int keep_locked;
  30};
  31
  32static int show_only;
  33static int verbose;
  34static int guess_remote;
  35static timestamp_t expire;
  36
  37static 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
  47static 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
 120static 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
 153static 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
 171static char *junk_work_tree;
 172static char *junk_git_dir;
 173static int is_junk;
 174static pid_t junk_pid;
 175
 176static 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
 193static void remove_junk_on_signal(int signo)
 194{
 195        remove_junk();
 196        sigchain_pop(signo);
 197        raise(signo);
 198}
 199
 200static 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
 219static 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
 333done:
 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
 356static 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
 390static const char *dwim_branch(const char *path, const char **new_branch)
 391{
 392        int n;
 393        const char *s = worktree_basename(path, &n);
 394        *new_branch = xstrndup(s, n);
 395        UNLEAK(*new_branch);
 396        if (guess_remote) {
 397                struct object_id oid;
 398                const char *remote =
 399                        unique_tracking_name(*new_branch, &oid);
 400                return remote;
 401        }
 402        return NULL;
 403}
 404
 405static int add(int ac, const char **av, const char *prefix)
 406{
 407        struct add_opts opts;
 408        const char *new_branch_force = NULL;
 409        char *path;
 410        const char *branch;
 411        const char *new_branch = NULL;
 412        const char *opt_track = NULL;
 413        struct option options[] = {
 414                OPT__FORCE(&opts.force, N_("checkout <branch> even if already checked out in other worktree")),
 415                OPT_STRING('b', NULL, &new_branch, N_("branch"),
 416                           N_("create a new branch")),
 417                OPT_STRING('B', NULL, &new_branch_force, N_("branch"),
 418                           N_("create or reset a branch")),
 419                OPT_BOOL(0, "detach", &opts.detach, N_("detach HEAD at named commit")),
 420                OPT_BOOL(0, "checkout", &opts.checkout, N_("populate the new working tree")),
 421                OPT_BOOL(0, "lock", &opts.keep_locked, N_("keep the new working tree locked")),
 422                OPT_PASSTHRU(0, "track", &opt_track, NULL,
 423                             N_("set up tracking mode (see git-branch(1))"),
 424                             PARSE_OPT_NOARG | PARSE_OPT_OPTARG),
 425                OPT_BOOL(0, "guess-remote", &guess_remote,
 426                         N_("try to match the new branch name with a remote-tracking branch")),
 427                OPT_END()
 428        };
 429
 430        memset(&opts, 0, sizeof(opts));
 431        opts.checkout = 1;
 432        ac = parse_options(ac, av, prefix, options, worktree_usage, 0);
 433        if (!!opts.detach + !!new_branch + !!new_branch_force > 1)
 434                die(_("-b, -B, and --detach are mutually exclusive"));
 435        if (ac < 1 || ac > 2)
 436                usage_with_options(worktree_usage, options);
 437
 438        path = prefix_filename(prefix, av[0]);
 439        branch = ac < 2 ? "HEAD" : av[1];
 440
 441        if (!strcmp(branch, "-"))
 442                branch = "@{-1}";
 443
 444        if (new_branch_force) {
 445                struct strbuf symref = STRBUF_INIT;
 446
 447                new_branch = new_branch_force;
 448
 449                if (!opts.force &&
 450                    !strbuf_check_branch_ref(&symref, new_branch) &&
 451                    ref_exists(symref.buf))
 452                        die_if_checked_out(symref.buf, 0);
 453                strbuf_release(&symref);
 454        }
 455
 456        if (ac < 2 && !new_branch && !opts.detach) {
 457                const char *s = dwim_branch(path, &new_branch);
 458                if (s)
 459                        branch = s;
 460        }
 461
 462        if (ac == 2 && !new_branch && !opts.detach) {
 463                struct object_id oid;
 464                struct commit *commit;
 465                const char *remote;
 466
 467                commit = lookup_commit_reference_by_name(branch);
 468                if (!commit) {
 469                        remote = unique_tracking_name(branch, &oid);
 470                        if (remote) {
 471                                new_branch = branch;
 472                                branch = remote;
 473                        }
 474                }
 475        }
 476
 477        print_preparing_worktree_line(opts.detach, branch, new_branch, !!new_branch_force);
 478
 479        if (new_branch) {
 480                struct child_process cp = CHILD_PROCESS_INIT;
 481                cp.git_cmd = 1;
 482                argv_array_push(&cp.args, "branch");
 483                if (new_branch_force)
 484                        argv_array_push(&cp.args, "--force");
 485                argv_array_push(&cp.args, new_branch);
 486                argv_array_push(&cp.args, branch);
 487                if (opt_track)
 488                        argv_array_push(&cp.args, opt_track);
 489                if (run_command(&cp))
 490                        return -1;
 491                branch = new_branch;
 492        } else if (opt_track) {
 493                die(_("--[no-]track can only be used if a new branch is created"));
 494        }
 495
 496        UNLEAK(path);
 497        UNLEAK(opts);
 498        return add_worktree(path, branch, &opts);
 499}
 500
 501static void show_worktree_porcelain(struct worktree *wt)
 502{
 503        printf("worktree %s\n", wt->path);
 504        if (wt->is_bare)
 505                printf("bare\n");
 506        else {
 507                printf("HEAD %s\n", oid_to_hex(&wt->head_oid));
 508                if (wt->is_detached)
 509                        printf("detached\n");
 510                else if (wt->head_ref)
 511                        printf("branch %s\n", wt->head_ref);
 512        }
 513        printf("\n");
 514}
 515
 516static void show_worktree(struct worktree *wt, int path_maxlen, int abbrev_len)
 517{
 518        struct strbuf sb = STRBUF_INIT;
 519        int cur_path_len = strlen(wt->path);
 520        int path_adj = cur_path_len - utf8_strwidth(wt->path);
 521
 522        strbuf_addf(&sb, "%-*s ", 1 + path_maxlen + path_adj, wt->path);
 523        if (wt->is_bare)
 524                strbuf_addstr(&sb, "(bare)");
 525        else {
 526                strbuf_addf(&sb, "%-*s ", abbrev_len,
 527                                find_unique_abbrev(wt->head_oid.hash, DEFAULT_ABBREV));
 528                if (wt->is_detached)
 529                        strbuf_addstr(&sb, "(detached HEAD)");
 530                else if (wt->head_ref) {
 531                        char *ref = shorten_unambiguous_ref(wt->head_ref, 0);
 532                        strbuf_addf(&sb, "[%s]", ref);
 533                        free(ref);
 534                } else
 535                        strbuf_addstr(&sb, "(error)");
 536        }
 537        printf("%s\n", sb.buf);
 538
 539        strbuf_release(&sb);
 540}
 541
 542static void measure_widths(struct worktree **wt, int *abbrev, int *maxlen)
 543{
 544        int i;
 545
 546        for (i = 0; wt[i]; i++) {
 547                int sha1_len;
 548                int path_len = strlen(wt[i]->path);
 549
 550                if (path_len > *maxlen)
 551                        *maxlen = path_len;
 552                sha1_len = strlen(find_unique_abbrev(wt[i]->head_oid.hash, *abbrev));
 553                if (sha1_len > *abbrev)
 554                        *abbrev = sha1_len;
 555        }
 556}
 557
 558static int list(int ac, const char **av, const char *prefix)
 559{
 560        int porcelain = 0;
 561
 562        struct option options[] = {
 563                OPT_BOOL(0, "porcelain", &porcelain, N_("machine-readable output")),
 564                OPT_END()
 565        };
 566
 567        ac = parse_options(ac, av, prefix, options, worktree_usage, 0);
 568        if (ac)
 569                usage_with_options(worktree_usage, options);
 570        else {
 571                struct worktree **worktrees = get_worktrees(GWT_SORT_LINKED);
 572                int path_maxlen = 0, abbrev = DEFAULT_ABBREV, i;
 573
 574                if (!porcelain)
 575                        measure_widths(worktrees, &abbrev, &path_maxlen);
 576
 577                for (i = 0; worktrees[i]; i++) {
 578                        if (porcelain)
 579                                show_worktree_porcelain(worktrees[i]);
 580                        else
 581                                show_worktree(worktrees[i], path_maxlen, abbrev);
 582                }
 583                free_worktrees(worktrees);
 584        }
 585        return 0;
 586}
 587
 588static int lock_worktree(int ac, const char **av, const char *prefix)
 589{
 590        const char *reason = "", *old_reason;
 591        struct option options[] = {
 592                OPT_STRING(0, "reason", &reason, N_("string"),
 593                           N_("reason for locking")),
 594                OPT_END()
 595        };
 596        struct worktree **worktrees, *wt;
 597
 598        ac = parse_options(ac, av, prefix, options, worktree_usage, 0);
 599        if (ac != 1)
 600                usage_with_options(worktree_usage, options);
 601
 602        worktrees = get_worktrees(0);
 603        wt = find_worktree(worktrees, prefix, av[0]);
 604        if (!wt)
 605                die(_("'%s' is not a working tree"), av[0]);
 606        if (is_main_worktree(wt))
 607                die(_("The main working tree cannot be locked or unlocked"));
 608
 609        old_reason = is_worktree_locked(wt);
 610        if (old_reason) {
 611                if (*old_reason)
 612                        die(_("'%s' is already locked, reason: %s"),
 613                            av[0], old_reason);
 614                die(_("'%s' is already locked"), av[0]);
 615        }
 616
 617        write_file(git_common_path("worktrees/%s/locked", wt->id),
 618                   "%s", reason);
 619        free_worktrees(worktrees);
 620        return 0;
 621}
 622
 623static int unlock_worktree(int ac, const char **av, const char *prefix)
 624{
 625        struct option options[] = {
 626                OPT_END()
 627        };
 628        struct worktree **worktrees, *wt;
 629        int ret;
 630
 631        ac = parse_options(ac, av, prefix, options, worktree_usage, 0);
 632        if (ac != 1)
 633                usage_with_options(worktree_usage, options);
 634
 635        worktrees = get_worktrees(0);
 636        wt = find_worktree(worktrees, prefix, av[0]);
 637        if (!wt)
 638                die(_("'%s' is not a working tree"), av[0]);
 639        if (is_main_worktree(wt))
 640                die(_("The main working tree cannot be locked or unlocked"));
 641        if (!is_worktree_locked(wt))
 642                die(_("'%s' is not locked"), av[0]);
 643        ret = unlink_or_warn(git_common_path("worktrees/%s/locked", wt->id));
 644        free_worktrees(worktrees);
 645        return ret;
 646}
 647
 648int cmd_worktree(int ac, const char **av, const char *prefix)
 649{
 650        struct option options[] = {
 651                OPT_END()
 652        };
 653
 654        git_config(git_worktree_config, NULL);
 655
 656        if (ac < 2)
 657                usage_with_options(worktree_usage, options);
 658        if (!prefix)
 659                prefix = "";
 660        if (!strcmp(av[1], "add"))
 661                return add(ac - 1, av + 1, prefix);
 662        if (!strcmp(av[1], "prune"))
 663                return prune(ac - 1, av + 1, prefix);
 664        if (!strcmp(av[1], "list"))
 665                return list(ac - 1, av + 1, prefix);
 666        if (!strcmp(av[1], "lock"))
 667                return lock_worktree(ac - 1, av + 1, prefix);
 668        if (!strcmp(av[1], "unlock"))
 669                return unlock_worktree(ac - 1, av + 1, prefix);
 670        usage_with_options(worktree_usage, options);
 671}