Andrew's git / gitweb.git / builtin/worktree.c
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builtin / worktree.con commit grep.c: remove implicit dependency on the_index (38bbc2e)
   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> [<commit-ish>]"),
  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 remove [<options>] <worktree>"),
  23        N_("git worktree unlock <path>"),
  24        NULL
  25};
  26
  27struct add_opts {
  28        int force;
  29        int detach;
  30        int quiet;
  31        int checkout;
  32        int keep_locked;
  33};
  34
  35static int show_only;
  36static int verbose;
  37static int guess_remote;
  38static timestamp_t expire;
  39
  40static int git_worktree_config(const char *var, const char *value, void *cb)
  41{
  42        if (!strcmp(var, "worktree.guessremote")) {
  43                guess_remote = git_config_bool(var, value);
  44                return 0;
  45        }
  46
  47        return git_default_config(var, value, cb);
  48}
  49
  50static int prune_worktree(const char *id, struct strbuf *reason)
  51{
  52        struct stat st;
  53        char *path;
  54        int fd;
  55        size_t len;
  56        ssize_t read_result;
  57
  58        if (!is_directory(git_path("worktrees/%s", id))) {
  59                strbuf_addf(reason, _("Removing worktrees/%s: not a valid directory"), id);
  60                return 1;
  61        }
  62        if (file_exists(git_path("worktrees/%s/locked", id)))
  63                return 0;
  64        if (stat(git_path("worktrees/%s/gitdir", id), &st)) {
  65                strbuf_addf(reason, _("Removing worktrees/%s: gitdir file does not exist"), id);
  66                return 1;
  67        }
  68        fd = open(git_path("worktrees/%s/gitdir", id), O_RDONLY);
  69        if (fd < 0) {
  70                strbuf_addf(reason, _("Removing worktrees/%s: unable to read gitdir file (%s)"),
  71                            id, strerror(errno));
  72                return 1;
  73        }
  74        len = xsize_t(st.st_size);
  75        path = xmallocz(len);
  76
  77        read_result = read_in_full(fd, path, len);
  78        if (read_result < 0) {
  79                strbuf_addf(reason, _("Removing worktrees/%s: unable to read gitdir file (%s)"),
  80                            id, strerror(errno));
  81                close(fd);
  82                free(path);
  83                return 1;
  84        }
  85        close(fd);
  86
  87        if (read_result != len) {
  88                strbuf_addf(reason,
  89                            _("Removing worktrees/%s: short read (expected %"PRIuMAX" bytes, read %"PRIuMAX")"),
  90                            id, (uintmax_t)len, (uintmax_t)read_result);
  91                free(path);
  92                return 1;
  93        }
  94        while (len && (path[len - 1] == '\n' || path[len - 1] == '\r'))
  95                len--;
  96        if (!len) {
  97                strbuf_addf(reason, _("Removing worktrees/%s: invalid gitdir file"), id);
  98                free(path);
  99                return 1;
 100        }
 101        path[len] = '\0';
 102        if (!file_exists(path)) {
 103                free(path);
 104                if (stat(git_path("worktrees/%s/index", id), &st) ||
 105                    st.st_mtime <= expire) {
 106                        strbuf_addf(reason, _("Removing worktrees/%s: gitdir file points to non-existent location"), id);
 107                        return 1;
 108                } else {
 109                        return 0;
 110                }
 111        }
 112        free(path);
 113        return 0;
 114}
 115
 116static void prune_worktrees(void)
 117{
 118        struct strbuf reason = STRBUF_INIT;
 119        struct strbuf path = STRBUF_INIT;
 120        DIR *dir = opendir(git_path("worktrees"));
 121        struct dirent *d;
 122        int ret;
 123        if (!dir)
 124                return;
 125        while ((d = readdir(dir)) != NULL) {
 126                if (is_dot_or_dotdot(d->d_name))
 127                        continue;
 128                strbuf_reset(&reason);
 129                if (!prune_worktree(d->d_name, &reason))
 130                        continue;
 131                if (show_only || verbose)
 132                        printf("%s\n", reason.buf);
 133                if (show_only)
 134                        continue;
 135                git_path_buf(&path, "worktrees/%s", d->d_name);
 136                ret = remove_dir_recursively(&path, 0);
 137                if (ret < 0 && errno == ENOTDIR)
 138                        ret = unlink(path.buf);
 139                if (ret)
 140                        error_errno(_("failed to remove '%s'"), path.buf);
 141        }
 142        closedir(dir);
 143        if (!show_only)
 144                rmdir(git_path("worktrees"));
 145        strbuf_release(&reason);
 146        strbuf_release(&path);
 147}
 148
 149static int prune(int ac, const char **av, const char *prefix)
 150{
 151        struct option options[] = {
 152                OPT__DRY_RUN(&show_only, N_("do not remove, show only")),
 153                OPT__VERBOSE(&verbose, N_("report pruned working trees")),
 154                OPT_EXPIRY_DATE(0, "expire", &expire,
 155                                N_("expire working trees older than <time>")),
 156                OPT_END()
 157        };
 158
 159        expire = TIME_MAX;
 160        ac = parse_options(ac, av, prefix, options, worktree_usage, 0);
 161        if (ac)
 162                usage_with_options(worktree_usage, options);
 163        prune_worktrees();
 164        return 0;
 165}
 166
 167static char *junk_work_tree;
 168static char *junk_git_dir;
 169static int is_junk;
 170static pid_t junk_pid;
 171
 172static void remove_junk(void)
 173{
 174        struct strbuf sb = STRBUF_INIT;
 175        if (!is_junk || getpid() != junk_pid)
 176                return;
 177        if (junk_git_dir) {
 178                strbuf_addstr(&sb, junk_git_dir);
 179                remove_dir_recursively(&sb, 0);
 180                strbuf_reset(&sb);
 181        }
 182        if (junk_work_tree) {
 183                strbuf_addstr(&sb, junk_work_tree);
 184                remove_dir_recursively(&sb, 0);
 185        }
 186        strbuf_release(&sb);
 187}
 188
 189static void remove_junk_on_signal(int signo)
 190{
 191        remove_junk();
 192        sigchain_pop(signo);
 193        raise(signo);
 194}
 195
 196static const char *worktree_basename(const char *path, int *olen)
 197{
 198        const char *name;
 199        int len;
 200
 201        len = strlen(path);
 202        while (len && is_dir_sep(path[len - 1]))
 203                len--;
 204
 205        for (name = path + len - 1; name > path; name--)
 206                if (is_dir_sep(*name)) {
 207                        name++;
 208                        break;
 209                }
 210
 211        *olen = len;
 212        return name;
 213}
 214
 215static int add_worktree(const char *path, const char *refname,
 216                        const struct add_opts *opts)
 217{
 218        struct strbuf sb_git = STRBUF_INIT, sb_repo = STRBUF_INIT;
 219        struct strbuf sb = STRBUF_INIT;
 220        const char *name;
 221        struct stat st;
 222        struct child_process cp = CHILD_PROCESS_INIT;
 223        struct argv_array child_env = ARGV_ARRAY_INIT;
 224        int counter = 0, len, ret;
 225        struct strbuf symref = STRBUF_INIT;
 226        struct commit *commit = NULL;
 227        int is_branch = 0;
 228
 229        if (file_exists(path) && !is_empty_dir(path))
 230                die(_("'%s' already exists"), path);
 231
 232        /* is 'refname' a branch or commit? */
 233        if (!opts->detach && !strbuf_check_branch_ref(&symref, refname) &&
 234            ref_exists(symref.buf)) {
 235                is_branch = 1;
 236                if (!opts->force)
 237                        die_if_checked_out(symref.buf, 0);
 238        }
 239        commit = lookup_commit_reference_by_name(refname);
 240        if (!commit)
 241                die(_("invalid reference: %s"), refname);
 242
 243        name = worktree_basename(path, &len);
 244        git_path_buf(&sb_repo, "worktrees/%.*s", (int)(path + len - name), name);
 245        len = sb_repo.len;
 246        if (safe_create_leading_directories_const(sb_repo.buf))
 247                die_errno(_("could not create leading directories of '%s'"),
 248                          sb_repo.buf);
 249        while (!stat(sb_repo.buf, &st)) {
 250                counter++;
 251                strbuf_setlen(&sb_repo, len);
 252                strbuf_addf(&sb_repo, "%d", counter);
 253        }
 254        name = strrchr(sb_repo.buf, '/') + 1;
 255
 256        junk_pid = getpid();
 257        atexit(remove_junk);
 258        sigchain_push_common(remove_junk_on_signal);
 259
 260        if (mkdir(sb_repo.buf, 0777))
 261                die_errno(_("could not create directory of '%s'"), sb_repo.buf);
 262        junk_git_dir = xstrdup(sb_repo.buf);
 263        is_junk = 1;
 264
 265        /*
 266         * lock the incomplete repo so prune won't delete it, unlock
 267         * after the preparation is over.
 268         */
 269        strbuf_addf(&sb, "%s/locked", sb_repo.buf);
 270        if (!opts->keep_locked)
 271                write_file(sb.buf, "initializing");
 272        else
 273                write_file(sb.buf, "added with --lock");
 274
 275        strbuf_addf(&sb_git, "%s/.git", path);
 276        if (safe_create_leading_directories_const(sb_git.buf))
 277                die_errno(_("could not create leading directories of '%s'"),
 278                          sb_git.buf);
 279        junk_work_tree = xstrdup(path);
 280
 281        strbuf_reset(&sb);
 282        strbuf_addf(&sb, "%s/gitdir", sb_repo.buf);
 283        write_file(sb.buf, "%s", real_path(sb_git.buf));
 284        write_file(sb_git.buf, "gitdir: %s/worktrees/%s",
 285                   real_path(get_git_common_dir()), name);
 286        /*
 287         * This is to keep resolve_ref() happy. We need a valid HEAD
 288         * or is_git_directory() will reject the directory. Any value which
 289         * looks like an object ID will do since it will be immediately
 290         * replaced by the symbolic-ref or update-ref invocation in the new
 291         * worktree.
 292         */
 293        strbuf_reset(&sb);
 294        strbuf_addf(&sb, "%s/HEAD", sb_repo.buf);
 295        write_file(sb.buf, "%s", sha1_to_hex(null_sha1));
 296        strbuf_reset(&sb);
 297        strbuf_addf(&sb, "%s/commondir", sb_repo.buf);
 298        write_file(sb.buf, "../..");
 299
 300        argv_array_pushf(&child_env, "%s=%s", GIT_DIR_ENVIRONMENT, sb_git.buf);
 301        argv_array_pushf(&child_env, "%s=%s", GIT_WORK_TREE_ENVIRONMENT, path);
 302        cp.git_cmd = 1;
 303
 304        if (!is_branch)
 305                argv_array_pushl(&cp.args, "update-ref", "HEAD",
 306                                 oid_to_hex(&commit->object.oid), NULL);
 307        else {
 308                argv_array_pushl(&cp.args, "symbolic-ref", "HEAD",
 309                                 symref.buf, NULL);
 310                if (opts->quiet)
 311                        argv_array_push(&cp.args, "--quiet");
 312        }
 313
 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                if (opts->quiet)
 324                        argv_array_push(&cp.args, "--quiet");
 325                cp.env = child_env.argv;
 326                ret = run_command(&cp);
 327                if (ret)
 328                        goto done;
 329        }
 330
 331        is_junk = 0;
 332        FREE_AND_NULL(junk_work_tree);
 333        FREE_AND_NULL(junk_git_dir);
 334
 335done:
 336        if (ret || !opts->keep_locked) {
 337                strbuf_reset(&sb);
 338                strbuf_addf(&sb, "%s/locked", sb_repo.buf);
 339                unlink_or_warn(sb.buf);
 340        }
 341
 342        /*
 343         * Hook failure does not warrant worktree deletion, so run hook after
 344         * is_junk is cleared, but do return appropriate code when hook fails.
 345         */
 346        if (!ret && opts->checkout) {
 347                const char *hook = find_hook("post-checkout");
 348                if (hook) {
 349                        const char *env[] = { "GIT_DIR", "GIT_WORK_TREE", NULL };
 350                        cp.git_cmd = 0;
 351                        cp.no_stdin = 1;
 352                        cp.stdout_to_stderr = 1;
 353                        cp.dir = path;
 354                        cp.env = env;
 355                        cp.argv = NULL;
 356                        argv_array_pushl(&cp.args, absolute_path(hook),
 357                                         oid_to_hex(&null_oid),
 358                                         oid_to_hex(&commit->object.oid),
 359                                         "1", NULL);
 360                        ret = run_command(&cp);
 361                }
 362        }
 363
 364        argv_array_clear(&child_env);
 365        strbuf_release(&sb);
 366        strbuf_release(&symref);
 367        strbuf_release(&sb_repo);
 368        strbuf_release(&sb_git);
 369        return ret;
 370}
 371
 372static void print_preparing_worktree_line(int detach,
 373                                          const char *branch,
 374                                          const char *new_branch,
 375                                          int force_new_branch)
 376{
 377        if (force_new_branch) {
 378                struct commit *commit = lookup_commit_reference_by_name(new_branch);
 379                if (!commit)
 380                        printf_ln(_("Preparing worktree (new branch '%s')"), new_branch);
 381                else
 382                        printf_ln(_("Preparing worktree (resetting branch '%s'; was at %s)"),
 383                                  new_branch,
 384                                  find_unique_abbrev(&commit->object.oid, DEFAULT_ABBREV));
 385        } else if (new_branch) {
 386                printf_ln(_("Preparing worktree (new branch '%s')"), new_branch);
 387        } else {
 388                struct strbuf s = STRBUF_INIT;
 389                if (!detach && !strbuf_check_branch_ref(&s, branch) &&
 390                    ref_exists(s.buf))
 391                        printf_ln(_("Preparing worktree (checking out '%s')"),
 392                                  branch);
 393                else {
 394                        struct commit *commit = lookup_commit_reference_by_name(branch);
 395                        if (!commit)
 396                                die(_("invalid reference: %s"), branch);
 397                        printf_ln(_("Preparing worktree (detached HEAD %s)"),
 398                                  find_unique_abbrev(&commit->object.oid, DEFAULT_ABBREV));
 399                }
 400                strbuf_release(&s);
 401        }
 402}
 403
 404static const char *dwim_branch(const char *path, const char **new_branch)
 405{
 406        int n;
 407        const char *s = worktree_basename(path, &n);
 408        const char *branchname = xstrndup(s, n);
 409        struct strbuf ref = STRBUF_INIT;
 410
 411        UNLEAK(branchname);
 412        if (!strbuf_check_branch_ref(&ref, branchname) &&
 413            ref_exists(ref.buf)) {
 414                strbuf_release(&ref);
 415                return branchname;
 416        }
 417
 418        *new_branch = branchname;
 419        if (guess_remote) {
 420                struct object_id oid;
 421                const char *remote =
 422                        unique_tracking_name(*new_branch, &oid, NULL);
 423                return remote;
 424        }
 425        return NULL;
 426}
 427
 428static int add(int ac, const char **av, const char *prefix)
 429{
 430        struct add_opts opts;
 431        const char *new_branch_force = NULL;
 432        char *path;
 433        const char *branch;
 434        const char *new_branch = NULL;
 435        const char *opt_track = NULL;
 436        struct option options[] = {
 437                OPT__FORCE(&opts.force,
 438                           N_("checkout <branch> even if already checked out in other worktree"),
 439                           PARSE_OPT_NOCOMPLETE),
 440                OPT_STRING('b', NULL, &new_branch, N_("branch"),
 441                           N_("create a new branch")),
 442                OPT_STRING('B', NULL, &new_branch_force, N_("branch"),
 443                           N_("create or reset a branch")),
 444                OPT_BOOL(0, "detach", &opts.detach, N_("detach HEAD at named commit")),
 445                OPT_BOOL(0, "checkout", &opts.checkout, N_("populate the new working tree")),
 446                OPT_BOOL(0, "lock", &opts.keep_locked, N_("keep the new working tree locked")),
 447                OPT__QUIET(&opts.quiet, N_("suppress progress reporting")),
 448                OPT_PASSTHRU(0, "track", &opt_track, NULL,
 449                             N_("set up tracking mode (see git-branch(1))"),
 450                             PARSE_OPT_NOARG | PARSE_OPT_OPTARG),
 451                OPT_BOOL(0, "guess-remote", &guess_remote,
 452                         N_("try to match the new branch name with a remote-tracking branch")),
 453                OPT_END()
 454        };
 455
 456        memset(&opts, 0, sizeof(opts));
 457        opts.checkout = 1;
 458        ac = parse_options(ac, av, prefix, options, worktree_usage, 0);
 459        if (!!opts.detach + !!new_branch + !!new_branch_force > 1)
 460                die(_("-b, -B, and --detach are mutually exclusive"));
 461        if (ac < 1 || ac > 2)
 462                usage_with_options(worktree_usage, options);
 463
 464        path = prefix_filename(prefix, av[0]);
 465        branch = ac < 2 ? "HEAD" : av[1];
 466
 467        if (!strcmp(branch, "-"))
 468                branch = "@{-1}";
 469
 470        if (new_branch_force) {
 471                struct strbuf symref = STRBUF_INIT;
 472
 473                new_branch = new_branch_force;
 474
 475                if (!opts.force &&
 476                    !strbuf_check_branch_ref(&symref, new_branch) &&
 477                    ref_exists(symref.buf))
 478                        die_if_checked_out(symref.buf, 0);
 479                strbuf_release(&symref);
 480        }
 481
 482        if (ac < 2 && !new_branch && !opts.detach) {
 483                const char *s = dwim_branch(path, &new_branch);
 484                if (s)
 485                        branch = s;
 486        }
 487
 488        if (ac == 2 && !new_branch && !opts.detach) {
 489                struct object_id oid;
 490                struct commit *commit;
 491                const char *remote;
 492
 493                commit = lookup_commit_reference_by_name(branch);
 494                if (!commit) {
 495                        remote = unique_tracking_name(branch, &oid, NULL);
 496                        if (remote) {
 497                                new_branch = branch;
 498                                branch = remote;
 499                        }
 500                }
 501        }
 502        if (!opts.quiet)
 503                print_preparing_worktree_line(opts.detach, branch, new_branch, !!new_branch_force);
 504
 505        if (new_branch) {
 506                struct child_process cp = CHILD_PROCESS_INIT;
 507                cp.git_cmd = 1;
 508                argv_array_push(&cp.args, "branch");
 509                if (new_branch_force)
 510                        argv_array_push(&cp.args, "--force");
 511                if (opts.quiet)
 512                        argv_array_push(&cp.args, "--quiet");
 513                argv_array_push(&cp.args, new_branch);
 514                argv_array_push(&cp.args, branch);
 515                if (opt_track)
 516                        argv_array_push(&cp.args, opt_track);
 517                if (run_command(&cp))
 518                        return -1;
 519                branch = new_branch;
 520        } else if (opt_track) {
 521                die(_("--[no-]track can only be used if a new branch is created"));
 522        }
 523
 524        UNLEAK(path);
 525        UNLEAK(opts);
 526        return add_worktree(path, branch, &opts);
 527}
 528
 529static void show_worktree_porcelain(struct worktree *wt)
 530{
 531        printf("worktree %s\n", wt->path);
 532        if (wt->is_bare)
 533                printf("bare\n");
 534        else {
 535                printf("HEAD %s\n", oid_to_hex(&wt->head_oid));
 536                if (wt->is_detached)
 537                        printf("detached\n");
 538                else if (wt->head_ref)
 539                        printf("branch %s\n", wt->head_ref);
 540        }
 541        printf("\n");
 542}
 543
 544static void show_worktree(struct worktree *wt, int path_maxlen, int abbrev_len)
 545{
 546        struct strbuf sb = STRBUF_INIT;
 547        int cur_path_len = strlen(wt->path);
 548        int path_adj = cur_path_len - utf8_strwidth(wt->path);
 549
 550        strbuf_addf(&sb, "%-*s ", 1 + path_maxlen + path_adj, wt->path);
 551        if (wt->is_bare)
 552                strbuf_addstr(&sb, "(bare)");
 553        else {
 554                strbuf_addf(&sb, "%-*s ", abbrev_len,
 555                                find_unique_abbrev(&wt->head_oid, DEFAULT_ABBREV));
 556                if (wt->is_detached)
 557                        strbuf_addstr(&sb, "(detached HEAD)");
 558                else if (wt->head_ref) {
 559                        char *ref = shorten_unambiguous_ref(wt->head_ref, 0);
 560                        strbuf_addf(&sb, "[%s]", ref);
 561                        free(ref);
 562                } else
 563                        strbuf_addstr(&sb, "(error)");
 564        }
 565        printf("%s\n", sb.buf);
 566
 567        strbuf_release(&sb);
 568}
 569
 570static void measure_widths(struct worktree **wt, int *abbrev, int *maxlen)
 571{
 572        int i;
 573
 574        for (i = 0; wt[i]; i++) {
 575                int sha1_len;
 576                int path_len = strlen(wt[i]->path);
 577
 578                if (path_len > *maxlen)
 579                        *maxlen = path_len;
 580                sha1_len = strlen(find_unique_abbrev(&wt[i]->head_oid, *abbrev));
 581                if (sha1_len > *abbrev)
 582                        *abbrev = sha1_len;
 583        }
 584}
 585
 586static int list(int ac, const char **av, const char *prefix)
 587{
 588        int porcelain = 0;
 589
 590        struct option options[] = {
 591                OPT_BOOL(0, "porcelain", &porcelain, N_("machine-readable output")),
 592                OPT_END()
 593        };
 594
 595        ac = parse_options(ac, av, prefix, options, worktree_usage, 0);
 596        if (ac)
 597                usage_with_options(worktree_usage, options);
 598        else {
 599                struct worktree **worktrees = get_worktrees(GWT_SORT_LINKED);
 600                int path_maxlen = 0, abbrev = DEFAULT_ABBREV, i;
 601
 602                if (!porcelain)
 603                        measure_widths(worktrees, &abbrev, &path_maxlen);
 604
 605                for (i = 0; worktrees[i]; i++) {
 606                        if (porcelain)
 607                                show_worktree_porcelain(worktrees[i]);
 608                        else
 609                                show_worktree(worktrees[i], path_maxlen, abbrev);
 610                }
 611                free_worktrees(worktrees);
 612        }
 613        return 0;
 614}
 615
 616static int lock_worktree(int ac, const char **av, const char *prefix)
 617{
 618        const char *reason = "", *old_reason;
 619        struct option options[] = {
 620                OPT_STRING(0, "reason", &reason, N_("string"),
 621                           N_("reason for locking")),
 622                OPT_END()
 623        };
 624        struct worktree **worktrees, *wt;
 625
 626        ac = parse_options(ac, av, prefix, options, worktree_usage, 0);
 627        if (ac != 1)
 628                usage_with_options(worktree_usage, options);
 629
 630        worktrees = get_worktrees(0);
 631        wt = find_worktree(worktrees, prefix, av[0]);
 632        if (!wt)
 633                die(_("'%s' is not a working tree"), av[0]);
 634        if (is_main_worktree(wt))
 635                die(_("The main working tree cannot be locked or unlocked"));
 636
 637        old_reason = is_worktree_locked(wt);
 638        if (old_reason) {
 639                if (*old_reason)
 640                        die(_("'%s' is already locked, reason: %s"),
 641                            av[0], old_reason);
 642                die(_("'%s' is already locked"), av[0]);
 643        }
 644
 645        write_file(git_common_path("worktrees/%s/locked", wt->id),
 646                   "%s", reason);
 647        free_worktrees(worktrees);
 648        return 0;
 649}
 650
 651static int unlock_worktree(int ac, const char **av, const char *prefix)
 652{
 653        struct option options[] = {
 654                OPT_END()
 655        };
 656        struct worktree **worktrees, *wt;
 657        int ret;
 658
 659        ac = parse_options(ac, av, prefix, options, worktree_usage, 0);
 660        if (ac != 1)
 661                usage_with_options(worktree_usage, options);
 662
 663        worktrees = get_worktrees(0);
 664        wt = find_worktree(worktrees, prefix, av[0]);
 665        if (!wt)
 666                die(_("'%s' is not a working tree"), av[0]);
 667        if (is_main_worktree(wt))
 668                die(_("The main working tree cannot be locked or unlocked"));
 669        if (!is_worktree_locked(wt))
 670                die(_("'%s' is not locked"), av[0]);
 671        ret = unlink_or_warn(git_common_path("worktrees/%s/locked", wt->id));
 672        free_worktrees(worktrees);
 673        return ret;
 674}
 675
 676static void validate_no_submodules(const struct worktree *wt)
 677{
 678        struct index_state istate = { NULL };
 679        int i, found_submodules = 0;
 680
 681        if (read_index_from(&istate, worktree_git_path(wt, "index"),
 682                            get_worktree_git_dir(wt)) > 0) {
 683                for (i = 0; i < istate.cache_nr; i++) {
 684                        struct cache_entry *ce = istate.cache[i];
 685
 686                        if (S_ISGITLINK(ce->ce_mode)) {
 687                                found_submodules = 1;
 688                                break;
 689                        }
 690                }
 691        }
 692        discard_index(&istate);
 693
 694        if (found_submodules)
 695                die(_("working trees containing submodules cannot be moved or removed"));
 696}
 697
 698static int move_worktree(int ac, const char **av, const char *prefix)
 699{
 700        struct option options[] = {
 701                OPT_END()
 702        };
 703        struct worktree **worktrees, *wt;
 704        struct strbuf dst = STRBUF_INIT;
 705        struct strbuf errmsg = STRBUF_INIT;
 706        const char *reason;
 707        char *path;
 708
 709        ac = parse_options(ac, av, prefix, options, worktree_usage, 0);
 710        if (ac != 2)
 711                usage_with_options(worktree_usage, options);
 712
 713        path = prefix_filename(prefix, av[1]);
 714        strbuf_addstr(&dst, path);
 715        free(path);
 716
 717        worktrees = get_worktrees(0);
 718        wt = find_worktree(worktrees, prefix, av[0]);
 719        if (!wt)
 720                die(_("'%s' is not a working tree"), av[0]);
 721        if (is_main_worktree(wt))
 722                die(_("'%s' is a main working tree"), av[0]);
 723        if (is_directory(dst.buf)) {
 724                const char *sep = find_last_dir_sep(wt->path);
 725
 726                if (!sep)
 727                        die(_("could not figure out destination name from '%s'"),
 728                            wt->path);
 729                strbuf_trim_trailing_dir_sep(&dst);
 730                strbuf_addstr(&dst, sep);
 731        }
 732        if (file_exists(dst.buf))
 733                die(_("target '%s' already exists"), dst.buf);
 734
 735        validate_no_submodules(wt);
 736
 737        reason = is_worktree_locked(wt);
 738        if (reason) {
 739                if (*reason)
 740                        die(_("cannot move a locked working tree, lock reason: %s"),
 741                            reason);
 742                die(_("cannot move a locked working tree"));
 743        }
 744        if (validate_worktree(wt, &errmsg, 0))
 745                die(_("validation failed, cannot move working tree: %s"),
 746                    errmsg.buf);
 747        strbuf_release(&errmsg);
 748
 749        if (rename(wt->path, dst.buf) == -1)
 750                die_errno(_("failed to move '%s' to '%s'"), wt->path, dst.buf);
 751
 752        update_worktree_location(wt, dst.buf);
 753
 754        strbuf_release(&dst);
 755        free_worktrees(worktrees);
 756        return 0;
 757}
 758
 759/*
 760 * Note, "git status --porcelain" is used to determine if it's safe to
 761 * delete a whole worktree. "git status" does not ignore user
 762 * configuration, so if a normal "git status" shows "clean" for the
 763 * user, then it's ok to remove it.
 764 *
 765 * This assumption may be a bad one. We may want to ignore
 766 * (potentially bad) user settings and only delete a worktree when
 767 * it's absolutely safe to do so from _our_ point of view because we
 768 * know better.
 769 */
 770static void check_clean_worktree(struct worktree *wt,
 771                                 const char *original_path)
 772{
 773        struct argv_array child_env = ARGV_ARRAY_INIT;
 774        struct child_process cp;
 775        char buf[1];
 776        int ret;
 777
 778        /*
 779         * Until we sort this out, all submodules are "dirty" and
 780         * will abort this function.
 781         */
 782        validate_no_submodules(wt);
 783
 784        argv_array_pushf(&child_env, "%s=%s/.git",
 785                         GIT_DIR_ENVIRONMENT, wt->path);
 786        argv_array_pushf(&child_env, "%s=%s",
 787                         GIT_WORK_TREE_ENVIRONMENT, wt->path);
 788        memset(&cp, 0, sizeof(cp));
 789        argv_array_pushl(&cp.args, "status",
 790                         "--porcelain", "--ignore-submodules=none",
 791                         NULL);
 792        cp.env = child_env.argv;
 793        cp.git_cmd = 1;
 794        cp.dir = wt->path;
 795        cp.out = -1;
 796        ret = start_command(&cp);
 797        if (ret)
 798                die_errno(_("failed to run 'git status' on '%s'"),
 799                          original_path);
 800        ret = xread(cp.out, buf, sizeof(buf));
 801        if (ret)
 802                die(_("'%s' is dirty, use --force to delete it"),
 803                    original_path);
 804        close(cp.out);
 805        ret = finish_command(&cp);
 806        if (ret)
 807                die_errno(_("failed to run 'git status' on '%s', code %d"),
 808                          original_path, ret);
 809}
 810
 811static int delete_git_work_tree(struct worktree *wt)
 812{
 813        struct strbuf sb = STRBUF_INIT;
 814        int ret = 0;
 815
 816        strbuf_addstr(&sb, wt->path);
 817        if (remove_dir_recursively(&sb, 0)) {
 818                error_errno(_("failed to delete '%s'"), sb.buf);
 819                ret = -1;
 820        }
 821        strbuf_release(&sb);
 822        return ret;
 823}
 824
 825static int delete_git_dir(struct worktree *wt)
 826{
 827        struct strbuf sb = STRBUF_INIT;
 828        int ret = 0;
 829
 830        strbuf_addstr(&sb, git_common_path("worktrees/%s", wt->id));
 831        if (remove_dir_recursively(&sb, 0)) {
 832                error_errno(_("failed to delete '%s'"), sb.buf);
 833                ret = -1;
 834        }
 835        strbuf_release(&sb);
 836        return ret;
 837}
 838
 839static int remove_worktree(int ac, const char **av, const char *prefix)
 840{
 841        int force = 0;
 842        struct option options[] = {
 843                OPT__FORCE(&force,
 844                         N_("force removing even if the worktree is dirty"),
 845                         PARSE_OPT_NOCOMPLETE),
 846                OPT_END()
 847        };
 848        struct worktree **worktrees, *wt;
 849        struct strbuf errmsg = STRBUF_INIT;
 850        const char *reason;
 851        int ret = 0;
 852
 853        ac = parse_options(ac, av, prefix, options, worktree_usage, 0);
 854        if (ac != 1)
 855                usage_with_options(worktree_usage, options);
 856
 857        worktrees = get_worktrees(0);
 858        wt = find_worktree(worktrees, prefix, av[0]);
 859        if (!wt)
 860                die(_("'%s' is not a working tree"), av[0]);
 861        if (is_main_worktree(wt))
 862                die(_("'%s' is a main working tree"), av[0]);
 863        reason = is_worktree_locked(wt);
 864        if (reason) {
 865                if (*reason)
 866                        die(_("cannot remove a locked working tree, lock reason: %s"),
 867                            reason);
 868                die(_("cannot remove a locked working tree"));
 869        }
 870        if (validate_worktree(wt, &errmsg, WT_VALIDATE_WORKTREE_MISSING_OK))
 871                die(_("validation failed, cannot remove working tree: %s"),
 872                    errmsg.buf);
 873        strbuf_release(&errmsg);
 874
 875        if (file_exists(wt->path)) {
 876                if (!force)
 877                        check_clean_worktree(wt, av[0]);
 878
 879                ret |= delete_git_work_tree(wt);
 880        }
 881        /*
 882         * continue on even if ret is non-zero, there's no going back
 883         * from here.
 884         */
 885        ret |= delete_git_dir(wt);
 886
 887        free_worktrees(worktrees);
 888        return ret;
 889}
 890
 891int cmd_worktree(int ac, const char **av, const char *prefix)
 892{
 893        struct option options[] = {
 894                OPT_END()
 895        };
 896
 897        git_config(git_worktree_config, NULL);
 898
 899        if (ac < 2)
 900                usage_with_options(worktree_usage, options);
 901        if (!prefix)
 902                prefix = "";
 903        if (!strcmp(av[1], "add"))
 904                return add(ac - 1, av + 1, prefix);
 905        if (!strcmp(av[1], "prune"))
 906                return prune(ac - 1, av + 1, prefix);
 907        if (!strcmp(av[1], "list"))
 908                return list(ac - 1, av + 1, prefix);
 909        if (!strcmp(av[1], "lock"))
 910                return lock_worktree(ac - 1, av + 1, prefix);
 911        if (!strcmp(av[1], "unlock"))
 912                return unlock_worktree(ac - 1, av + 1, prefix);
 913        if (!strcmp(av[1], "move"))
 914                return move_worktree(ac - 1, av + 1, prefix);
 915        if (!strcmp(av[1], "remove"))
 916                return remove_worktree(ac - 1, av + 1, prefix);
 917        usage_with_options(worktree_usage, options);
 918}