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

   1 /*
   2  * Builtin "git clone"
   3  *
   4  * Copyright (c) 2007 Kristian Høgsberg <krh@redhat.com>,
   5  *               2008 Daniel Barkalow <barkalow@iabervon.org>
   6  * Based on git-commit.sh by Junio C Hamano and Linus Torvalds
   7  *
   8  * Clone a repository into a different directory that does not yet exist.
   9  */
  10
  11 #include "cache.h"
  12 #include "parse-options.h"
  13 #include "fetch-pack.h"
  14 #include "refs.h"
  15 #include "tree.h"
  16 #include "tree-walk.h"
  17 #include "unpack-trees.h"
  18 #include "transport.h"
  19 #include "strbuf.h"
  20 #include "dir.h"
  21 #include "pack-refs.h"
  22 #include "sigchain.h"
  23 #include "branch.h"
  24 #include "remote.h"
  25 #include "run-command.h"
  26
  27 /*
  28  * Overall FIXMEs:
  29  *  - respect DB_ENVIRONMENT for .git/objects.
  30  *
  31  * Implementation notes:
  32  *  - dropping use-separate-remote and no-separate-remote compatibility
  33  *
  34  */
  35 static const char * const builtin_clone_usage[] = {
  36         "git clone [options] [--] <repo> [<dir>]",
  37         NULL
  38 };
  39
  40 static int option_quiet, option_no_checkout, option_bare, option_mirror;
  41 static int option_local, option_no_hardlinks, option_shared, option_recursive;
  42 static char *option_template, *option_reference, *option_depth;
  43 static char *option_origin = NULL;
  44 static char *option_branch = NULL;
  45 static char *option_upload_pack = "git-upload-pack";
  46 static int option_verbose;
  47 static int option_progress;
  48
  49 static struct option builtin_clone_options[] = {
  50         OPT__QUIET(&option_quiet),
  51         OPT__VERBOSE(&option_verbose),
  52         OPT_BOOLEAN(0, "progress", &option_progress,
  53                         "force progress reporting"),
  54         OPT_BOOLEAN('n', "no-checkout", &option_no_checkout,
  55                     "don't create a checkout"),
  56         OPT_BOOLEAN(0, "bare", &option_bare, "create a bare repository"),
  57         { OPTION_BOOLEAN, 0, "naked", &option_bare, NULL,
  58                 "create a bare repository",
  59                 PARSE_OPT_NOARG | PARSE_OPT_HIDDEN },
  60         OPT_BOOLEAN(0, "mirror", &option_mirror,
  61                     "create a mirror repository (implies bare)"),
  62         OPT_BOOLEAN('l', "local", &option_local,
  63                     "to clone from a local repository"),
  64         OPT_BOOLEAN(0, "no-hardlinks", &option_no_hardlinks,
  65                     "don't use local hardlinks, always copy"),
  66         OPT_BOOLEAN('s', "shared", &option_shared,
  67                     "setup as shared repository"),
  68         OPT_BOOLEAN(0, "recursive", &option_recursive,
  69                     "initialize submodules in the clone"),
  70         OPT_STRING(0, "template", &option_template, "path",
  71                    "path the template repository"),
  72         OPT_STRING(0, "reference", &option_reference, "repo",
  73                    "reference repository"),
  74         OPT_STRING('o', "origin", &option_origin, "branch",
  75                    "use <branch> instead of 'origin' to track upstream"),
  76         OPT_STRING('b', "branch", &option_branch, "branch",
  77                    "checkout <branch> instead of the remote's HEAD"),
  78         OPT_STRING('u', "upload-pack", &option_upload_pack, "path",
  79                    "path to git-upload-pack on the remote"),
  80         OPT_STRING(0, "depth", &option_depth, "depth",
  81                     "create a shallow clone of that depth"),
  82
  83         OPT_END()
  84 };
  85
  86 static const char *argv_submodule[] = {
  87         "submodule", "update", "--init", "--recursive", NULL
  88 };
  89
  90 static char *get_repo_path(const char *repo, int *is_bundle)
  91 {
  92         static char *suffix[] = { "/.git", ".git", "" };
  93         static char *bundle_suffix[] = { ".bundle", "" };
  94         struct stat st;
  95         int i;
  96
  97         for (i = 0; i < ARRAY_SIZE(suffix); i++) {
  98                 const char *path;
  99                 path = mkpath("%s%s", repo, suffix[i]);
 100                 if (is_directory(path)) {
 101                         *is_bundle = 0;
 102                         return xstrdup(make_nonrelative_path(path));
 103                 }
 104         }
 105
 106         for (i = 0; i < ARRAY_SIZE(bundle_suffix); i++) {
 107                 const char *path;
 108                 path = mkpath("%s%s", repo, bundle_suffix[i]);
 109                 if (!stat(path, &st) && S_ISREG(st.st_mode)) {
 110                         *is_bundle = 1;
 111                         return xstrdup(make_nonrelative_path(path));
 112                 }
 113         }
 114
 115         return NULL;
 116 }
 117
 118 static char *guess_dir_name(const char *repo, int is_bundle, int is_bare)
 119 {
 120         const char *end = repo + strlen(repo), *start;
 121         char *dir;
 122
 123         /*
 124          * Strip trailing spaces, slashes and /.git
 125          */
 126         while (repo < end && (is_dir_sep(end[-1]) || isspace(end[-1])))
 127                 end--;
 128         if (end - repo > 5 && is_dir_sep(end[-5]) &&
 129             !strncmp(end - 4, ".git", 4)) {
 130                 end -= 5;
 131                 while (repo < end && is_dir_sep(end[-1]))
 132                         end--;
 133         }
 134
 135         /*
 136          * Find last component, but be prepared that repo could have
 137          * the form  "remote.example.com:foo.git", i.e. no slash
 138          * in the directory part.
 139          */
 140         start = end;
 141         while (repo < start && !is_dir_sep(start[-1]) && start[-1] != ':')
 142                 start--;
 143
 144         /*
 145          * Strip .{bundle,git}.
 146          */
 147         if (is_bundle) {
 148                 if (end - start > 7 && !strncmp(end - 7, ".bundle", 7))
 149                         end -= 7;
 150         } else {
 151                 if (end - start > 4 && !strncmp(end - 4, ".git", 4))
 152                         end -= 4;
 153         }
 154
 155         if (is_bare) {
 156                 struct strbuf result = STRBUF_INIT;
 157                 strbuf_addf(&result, "%.*s.git", (int)(end - start), start);
 158                 dir = strbuf_detach(&result, NULL);
 159         } else
 160                 dir = xstrndup(start, end - start);
 161         /*
 162          * Replace sequences of 'control' characters and whitespace
 163          * with one ascii space, remove leading and trailing spaces.
 164          */
 165         if (*dir) {
 166                 char *out = dir;
 167                 int prev_space = 1 /* strip leading whitespace */;
 168                 for (end = dir; *end; ++end) {
 169                         char ch = *end;
 170                         if ((unsigned char)ch < '\x20')
 171                                 ch = '\x20';
 172                         if (isspace(ch)) {
 173                                 if (prev_space)
 174                                         continue;
 175                                 prev_space = 1;
 176                         } else
 177                                 prev_space = 0;
 178                         *out++ = ch;
 179                 }
 180                 *out = '\0';
 181                 if (out > dir && prev_space)
 182                         out[-1] = '\0';
 183         }
 184         return dir;
 185 }
 186
 187 static void strip_trailing_slashes(char *dir)
 188 {
 189         char *end = dir + strlen(dir);
 190
 191         while (dir < end - 1 && is_dir_sep(end[-1]))
 192                 end--;
 193         *end = '\0';
 194 }
 195
 196 static void setup_reference(const char *repo)
 197 {
 198         const char *ref_git;
 199         char *ref_git_copy;
 200
 201         struct remote *remote;
 202         struct transport *transport;
 203         const struct ref *extra;
 204
 205         ref_git = make_absolute_path(option_reference);
 206
 207         if (is_directory(mkpath("%s/.git/objects", ref_git)))
 208                 ref_git = mkpath("%s/.git", ref_git);
 209         else if (!is_directory(mkpath("%s/objects", ref_git)))
 210                 die("reference repository '%s' is not a local directory.",
 211                     option_reference);
 212
 213         ref_git_copy = xstrdup(ref_git);
 214
 215         add_to_alternates_file(ref_git_copy);
 216
 217         remote = remote_get(ref_git_copy);
 218         transport = transport_get(remote, ref_git_copy);
 219         for (extra = transport_get_remote_refs(transport); extra;
 220              extra = extra->next)
 221                 add_extra_ref(extra->name, extra->old_sha1, 0);
 222
 223         transport_disconnect(transport);
 224
 225         free(ref_git_copy);
 226 }
 227
 228 static void copy_or_link_directory(struct strbuf *src, struct strbuf *dest)
 229 {
 230         struct dirent *de;
 231         struct stat buf;
 232         int src_len, dest_len;
 233         DIR *dir;
 234
 235         dir = opendir(src->buf);
 236         if (!dir)
 237                 die_errno("failed to open '%s'", src->buf);
 238
 239         if (mkdir(dest->buf, 0777)) {
 240                 if (errno != EEXIST)
 241                         die_errno("failed to create directory '%s'", dest->buf);
 242                 else if (stat(dest->buf, &buf))
 243                         die_errno("failed to stat '%s'", dest->buf);
 244                 else if (!S_ISDIR(buf.st_mode))
 245                         die("%s exists and is not a directory", dest->buf);
 246         }
 247
 248         strbuf_addch(src, '/');
 249         src_len = src->len;
 250         strbuf_addch(dest, '/');
 251         dest_len = dest->len;
 252
 253         while ((de = readdir(dir)) != NULL) {
 254                 strbuf_setlen(src, src_len);
 255                 strbuf_addstr(src, de->d_name);
 256                 strbuf_setlen(dest, dest_len);
 257                 strbuf_addstr(dest, de->d_name);
 258                 if (stat(src->buf, &buf)) {
 259                         warning ("failed to stat %s\n", src->buf);
 260                         continue;
 261                 }
 262                 if (S_ISDIR(buf.st_mode)) {
 263                         if (de->d_name[0] != '.')
 264                                 copy_or_link_directory(src, dest);
 265                         continue;
 266                 }
 267
 268                 if (unlink(dest->buf) && errno != ENOENT)
 269                         die_errno("failed to unlink '%s'", dest->buf);
 270                 if (!option_no_hardlinks) {
 271                         if (!link(src->buf, dest->buf))
 272                                 continue;
 273                         if (option_local)
 274                                 die_errno("failed to create link '%s'", dest->buf);
 275                         option_no_hardlinks = 1;
 276                 }
 277                 if (copy_file_with_time(dest->buf, src->buf, 0666))
 278                         die_errno("failed to copy file to '%s'", dest->buf);
 279         }
 280         closedir(dir);
 281 }
 282
 283 static const struct ref *clone_local(const char *src_repo,
 284                                      const char *dest_repo)
 285 {
 286         const struct ref *ret;
 287         struct strbuf src = STRBUF_INIT;
 288         struct strbuf dest = STRBUF_INIT;
 289         struct remote *remote;
 290         struct transport *transport;
 291
 292         if (option_shared)
 293                 add_to_alternates_file(src_repo);
 294         else {
 295                 strbuf_addf(&src, "%s/objects", src_repo);
 296                 strbuf_addf(&dest, "%s/objects", dest_repo);
 297                 copy_or_link_directory(&src, &dest);
 298                 strbuf_release(&src);
 299                 strbuf_release(&dest);
 300         }
 301
 302         remote = remote_get(src_repo);
 303         transport = transport_get(remote, src_repo);
 304         ret = transport_get_remote_refs(transport);
 305         transport_disconnect(transport);
 306         return ret;
 307 }
 308
 309 static const char *junk_work_tree;
 310 static const char *junk_git_dir;
 311 static pid_t junk_pid;
 312
 313 static void remove_junk(void)
 314 {
 315         struct strbuf sb = STRBUF_INIT;
 316         if (getpid() != junk_pid)
 317                 return;
 318         if (junk_git_dir) {
 319                 strbuf_addstr(&sb, junk_git_dir);
 320                 remove_dir_recursively(&sb, 0);
 321                 strbuf_reset(&sb);
 322         }
 323         if (junk_work_tree) {
 324                 strbuf_addstr(&sb, junk_work_tree);
 325                 remove_dir_recursively(&sb, 0);
 326                 strbuf_reset(&sb);
 327         }
 328 }
 329
 330 static void remove_junk_on_signal(int signo)
 331 {
 332         remove_junk();
 333         sigchain_pop(signo);
 334         raise(signo);
 335 }
 336
 337 static struct ref *wanted_peer_refs(const struct ref *refs,
 338                 struct refspec *refspec)
 339 {
 340         struct ref *local_refs = NULL;
 341         struct ref **tail = &local_refs;
 342
 343         get_fetch_map(refs, refspec, &tail, 0);
 344         if (!option_mirror)
 345                 get_fetch_map(refs, tag_refspec, &tail, 0);
 346
 347         return local_refs;
 348 }
 349
 350 static void write_remote_refs(const struct ref *local_refs)
 351 {
 352         const struct ref *r;
 353
 354         for (r = local_refs; r; r = r->next)
 355                 add_extra_ref(r->peer_ref->name, r->old_sha1, 0);
 356
 357         pack_refs(PACK_REFS_ALL);
 358         clear_extra_refs();
 359 }
 360
 361 int cmd_clone(int argc, const char **argv, const char *prefix)
 362 {
 363         int is_bundle = 0;
 364         struct stat buf;
 365         const char *repo_name, *repo, *work_tree, *git_dir;
 366         char *path, *dir;
 367         int dest_exists;
 368         const struct ref *refs, *remote_head;
 369         const struct ref *remote_head_points_at;
 370         const struct ref *our_head_points_at;
 371         struct ref *mapped_refs;
 372         struct strbuf key = STRBUF_INIT, value = STRBUF_INIT;
 373         struct strbuf branch_top = STRBUF_INIT, reflog_msg = STRBUF_INIT;
 374         struct transport *transport = NULL;
 375         char *src_ref_prefix = "refs/heads/";
 376         int err = 0;
 377
 378         struct refspec *refspec;
 379         const char *fetch_pattern;
 380
 381         junk_pid = getpid();
 382
 383         argc = parse_options(argc, argv, prefix, builtin_clone_options,
 384                              builtin_clone_usage, 0);
 385
 386         if (argc > 2)
 387                 usage_msg_opt("Too many arguments.",
 388                         builtin_clone_usage, builtin_clone_options);
 389
 390         if (argc == 0)
 391                 usage_msg_opt("You must specify a repository to clone.",
 392                         builtin_clone_usage, builtin_clone_options);
 393
 394         if (option_mirror)
 395                 option_bare = 1;
 396
 397         if (option_bare) {
 398                 if (option_origin)
 399                         die("--bare and --origin %s options are incompatible.",
 400                             option_origin);
 401                 option_no_checkout = 1;
 402         }
 403
 404         if (!option_origin)
 405                 option_origin = "origin";
 406
 407         repo_name = argv[0];
 408
 409         path = get_repo_path(repo_name, &is_bundle);
 410         if (path)
 411                 repo = xstrdup(make_nonrelative_path(repo_name));
 412         else if (!strchr(repo_name, ':'))
 413                 repo = xstrdup(make_absolute_path(repo_name));
 414         else
 415                 repo = repo_name;
 416
 417         if (argc == 2)
 418                 dir = xstrdup(argv[1]);
 419         else
 420                 dir = guess_dir_name(repo_name, is_bundle, option_bare);
 421         strip_trailing_slashes(dir);
 422
 423         dest_exists = !stat(dir, &buf);
 424         if (dest_exists && !is_empty_dir(dir))
 425                 die("destination path '%s' already exists and is not "
 426                         "an empty directory.", dir);
 427
 428         strbuf_addf(&reflog_msg, "clone: from %s", repo);
 429
 430         if (option_bare)
 431                 work_tree = NULL;
 432         else {
 433                 work_tree = getenv("GIT_WORK_TREE");
 434                 if (work_tree && !stat(work_tree, &buf))
 435                         die("working tree '%s' already exists.", work_tree);
 436         }
 437
 438         if (option_bare || work_tree)
 439                 git_dir = xstrdup(dir);
 440         else {
 441                 work_tree = dir;
 442                 git_dir = xstrdup(mkpath("%s/.git", dir));
 443         }
 444
 445         if (!option_bare) {
 446                 junk_work_tree = work_tree;
 447                 if (safe_create_leading_directories_const(work_tree) < 0)
 448                         die_errno("could not create leading directories of '%s'",
 449                                   work_tree);
 450                 if (!dest_exists && mkdir(work_tree, 0755))
 451                         die_errno("could not create work tree dir '%s'.",
 452                                   work_tree);
 453                 set_git_work_tree(work_tree);
 454         }
 455         junk_git_dir = git_dir;
 456         atexit(remove_junk);
 457         sigchain_push_common(remove_junk_on_signal);
 458
 459         setenv(CONFIG_ENVIRONMENT, mkpath("%s/config", git_dir), 1);
 460
 461         if (safe_create_leading_directories_const(git_dir) < 0)
 462                 die("could not create leading directories of '%s'", git_dir);
 463         set_git_dir(make_absolute_path(git_dir));
 464
 465         init_db(option_template, option_quiet ? INIT_DB_QUIET : 0);
 466
 467         /*
 468          * At this point, the config exists, so we do not need the
 469          * environment variable.  We actually need to unset it, too, to
 470          * re-enable parsing of the global configs.
 471          */
 472         unsetenv(CONFIG_ENVIRONMENT);
 473
 474         if (option_reference)
 475                 setup_reference(git_dir);
 476
 477         git_config(git_default_config, NULL);
 478
 479         if (option_bare) {
 480                 if (option_mirror)
 481                         src_ref_prefix = "refs/";
 482                 strbuf_addstr(&branch_top, src_ref_prefix);
 483
 484                 git_config_set("core.bare", "true");
 485         } else {
 486                 strbuf_addf(&branch_top, "refs/remotes/%s/", option_origin);
 487         }
 488
 489         strbuf_addf(&value, "+%s*:%s*", src_ref_prefix, branch_top.buf);
 490
 491         if (option_mirror || !option_bare) {
 492                 /* Configure the remote */
 493                 strbuf_addf(&key, "remote.%s.fetch", option_origin);
 494                 git_config_set_multivar(key.buf, value.buf, "^$", 0);
 495                 strbuf_reset(&key);
 496
 497                 if (option_mirror) {
 498                         strbuf_addf(&key, "remote.%s.mirror", option_origin);
 499                         git_config_set(key.buf, "true");
 500                         strbuf_reset(&key);
 501                 }
 502
 503                 strbuf_addf(&key, "remote.%s.url", option_origin);
 504                 git_config_set(key.buf, repo);
 505                 strbuf_reset(&key);
 506         }
 507
 508         fetch_pattern = value.buf;
 509         refspec = parse_fetch_refspec(1, &fetch_pattern);
 510
 511         strbuf_reset(&value);
 512
 513         if (path && !is_bundle) {
 514                 refs = clone_local(path, git_dir);
 515                 mapped_refs = wanted_peer_refs(refs, refspec);
 516         } else {
 517                 struct remote *remote = remote_get(argv[0]);
 518                 transport = transport_get(remote, remote->url[0]);
 519
 520                 if (!transport->get_refs_list || !transport->fetch)
 521                         die("Don't know how to clone %s", transport->url);
 522
 523                 transport_set_option(transport, TRANS_OPT_KEEP, "yes");
 524
 525                 if (option_depth)
 526                         transport_set_option(transport, TRANS_OPT_DEPTH,
 527                                              option_depth);
 528
 529                 if (option_quiet)
 530                         transport->verbose = -1;
 531                 else if (option_verbose)
 532                         transport->verbose = 1;
 533
 534                 if (option_progress)
 535                         transport->progress = 1;
 536
 537                 if (option_upload_pack)
 538                         transport_set_option(transport, TRANS_OPT_UPLOADPACK,
 539                                              option_upload_pack);
 540
 541                 refs = transport_get_remote_refs(transport);
 542                 if (refs) {
 543                         mapped_refs = wanted_peer_refs(refs, refspec);
 544                         transport_fetch_refs(transport, mapped_refs);
 545                 }
 546         }
 547
 548         if (refs) {
 549                 clear_extra_refs();
 550
 551                 write_remote_refs(mapped_refs);
 552
 553                 remote_head = find_ref_by_name(refs, "HEAD");
 554                 remote_head_points_at =
 555                         guess_remote_head(remote_head, mapped_refs, 0);
 556
 557                 if (option_branch) {
 558                         struct strbuf head = STRBUF_INIT;
 559                         strbuf_addstr(&head, src_ref_prefix);
 560                         strbuf_addstr(&head, option_branch);
 561                         our_head_points_at =
 562                                 find_ref_by_name(mapped_refs, head.buf);
 563                         strbuf_release(&head);
 564
 565                         if (!our_head_points_at) {
 566                                 warning("Remote branch %s not found in "
 567                                         "upstream %s, using HEAD instead",
 568                                         option_branch, option_origin);
 569                                 our_head_points_at = remote_head_points_at;
 570                         }
 571                 }
 572                 else
 573                         our_head_points_at = remote_head_points_at;
 574         }
 575         else {
 576                 warning("You appear to have cloned an empty repository.");
 577                 our_head_points_at = NULL;
 578                 remote_head_points_at = NULL;
 579                 remote_head = NULL;
 580                 option_no_checkout = 1;
 581                 if (!option_bare)
 582                         install_branch_config(0, "master", option_origin,
 583                                               "refs/heads/master");
 584         }
 585
 586         if (remote_head_points_at && !option_bare) {
 587                 struct strbuf head_ref = STRBUF_INIT;
 588                 strbuf_addstr(&head_ref, branch_top.buf);
 589                 strbuf_addstr(&head_ref, "HEAD");
 590                 create_symref(head_ref.buf,
 591                               remote_head_points_at->peer_ref->name,
 592                               reflog_msg.buf);
 593         }
 594
 595         if (our_head_points_at) {
 596                 /* Local default branch link */
 597                 create_symref("HEAD", our_head_points_at->name, NULL);
 598                 if (!option_bare) {
 599                         const char *head = skip_prefix(our_head_points_at->name,
 600                                                        "refs/heads/");
 601                         update_ref(reflog_msg.buf, "HEAD",
 602                                    our_head_points_at->old_sha1,
 603                                    NULL, 0, DIE_ON_ERR);
 604                         install_branch_config(0, head, option_origin,
 605                                               our_head_points_at->name);
 606                 }
 607         } else if (remote_head) {
 608                 /* Source had detached HEAD pointing somewhere. */
 609                 if (!option_bare) {
 610                         update_ref(reflog_msg.buf, "HEAD",
 611                                    remote_head->old_sha1,
 612                                    NULL, REF_NODEREF, DIE_ON_ERR);
 613                         our_head_points_at = remote_head;
 614                 }
 615         } else {
 616                 /* Nothing to checkout out */
 617                 if (!option_no_checkout)
 618                         warning("remote HEAD refers to nonexistent ref, "
 619                                 "unable to checkout.\n");
 620                 option_no_checkout = 1;
 621         }
 622
 623         if (transport) {
 624                 transport_unlock_pack(transport);
 625                 transport_disconnect(transport);
 626         }
 627
 628         if (!option_no_checkout) {
 629                 struct lock_file *lock_file = xcalloc(1, sizeof(struct lock_file));
 630                 struct unpack_trees_options opts;
 631                 struct tree *tree;
 632                 struct tree_desc t;
 633                 int fd;
 634
 635                 /* We need to be in the new work tree for the checkout */
 636                 setup_work_tree();
 637
 638                 fd = hold_locked_index(lock_file, 1);
 639
 640                 memset(&opts, 0, sizeof opts);
 641                 opts.update = 1;
 642                 opts.merge = 1;
 643                 opts.fn = oneway_merge;
 644                 opts.verbose_update = !option_quiet;
 645                 opts.src_index = &the_index;
 646                 opts.dst_index = &the_index;
 647
 648                 tree = parse_tree_indirect(our_head_points_at->old_sha1);
 649                 parse_tree(tree);
 650                 init_tree_desc(&t, tree->buffer, tree->size);
 651                 unpack_trees(1, &t, &opts);
 652
 653                 if (write_cache(fd, active_cache, active_nr) ||
 654                     commit_locked_index(lock_file))
 655                         die("unable to write new index file");
 656
 657                 err |= run_hook(NULL, "post-checkout", sha1_to_hex(null_sha1),
 658                                 sha1_to_hex(our_head_points_at->old_sha1), "1",
 659                                 NULL);
 660
 661                 if (!err && option_recursive)
 662                         err = run_command_v_opt(argv_submodule, RUN_GIT_CMD);
 663         }
 664
 665         strbuf_release(&reflog_msg);
 666         strbuf_release(&branch_top);
 667         strbuf_release(&key);
 668         strbuf_release(&value);
 669         junk_pid = 0;
 670         return err;
 671 }