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 #define USE_THE_INDEX_COMPATIBILITY_MACROS
  12 #include "builtin.h"
  13 #include "config.h"
  14 #include "lockfile.h"
  15 #include "parse-options.h"
  16 #include "fetch-pack.h"
  17 #include "refs.h"
  18 #include "refspec.h"
  19 #include "object-store.h"
  20 #include "tree.h"
  21 #include "tree-walk.h"
  22 #include "unpack-trees.h"
  23 #include "transport.h"
  24 #include "strbuf.h"
  25 #include "dir.h"
  26 #include "dir-iterator.h"
  27 #include "iterator.h"
  28 #include "sigchain.h"
  29 #include "branch.h"
  30 #include "remote.h"
  31 #include "run-command.h"
  32 #include "connected.h"
  33 #include "packfile.h"
  34 #include "list-objects-filter-options.h"
  35
  36 /*
  37  * Overall FIXMEs:
  38  *  - respect DB_ENVIRONMENT for .git/objects.
  39  *
  40  * Implementation notes:
  41  *  - dropping use-separate-remote and no-separate-remote compatibility
  42  *
  43  */
  44 static const char * const builtin_clone_usage[] = {
  45         N_("git clone [<options>] [--] <repo> [<dir>]"),
  46         NULL
  47 };
  48
  49 static int option_no_checkout, option_bare, option_mirror, option_single_branch = -1;
  50 static int option_local = -1, option_no_hardlinks, option_shared;
  51 static int option_no_tags;
  52 static int option_shallow_submodules;
  53 static int option_reject_shallow = -1;    /* unspecified */
  54 static int config_reject_shallow = -1;    /* unspecified */
  55 static int deepen;
  56 static char *option_template, *option_depth, *option_since;
  57 static char *option_origin = NULL;
  58 static char *remote_name = NULL;
  59 static char *option_branch = NULL;
  60 static struct string_list option_not = STRING_LIST_INIT_NODUP;
  61 static const char *real_git_dir;
  62 static char *option_upload_pack = "git-upload-pack";
  63 static int option_verbosity;
  64 static int option_progress = -1;
  65 static int option_sparse_checkout;
  66 static enum transport_family family;
  67 static struct string_list option_config = STRING_LIST_INIT_NODUP;
  68 static struct string_list option_required_reference = STRING_LIST_INIT_NODUP;
  69 static struct string_list option_optional_reference = STRING_LIST_INIT_NODUP;
  70 static int option_dissociate;
  71 static int max_jobs = -1;
  72 static struct string_list option_recurse_submodules = STRING_LIST_INIT_NODUP;
  73 static struct list_objects_filter_options filter_options;
  74 static struct string_list server_options = STRING_LIST_INIT_NODUP;
  75 static int option_remote_submodules;
  76
  77 static int recurse_submodules_cb(const struct option *opt,
  78                                  const char *arg, int unset)
  79 {
  80         if (unset)
  81                 string_list_clear((struct string_list *)opt->value, 0);
  82         else if (arg)
  83                 string_list_append((struct string_list *)opt->value, arg);
  84         else
  85                 string_list_append((struct string_list *)opt->value,
  86                                    (const char *)opt->defval);
  87
  88         return 0;
  89 }
  90
  91 static struct option builtin_clone_options[] = {
  92         OPT__VERBOSITY(&option_verbosity),
  93         OPT_BOOL(0, "progress", &option_progress,
  94                  N_("force progress reporting")),
  95         OPT_BOOL(0, "reject-shallow", &option_reject_shallow,
  96                  N_("don't clone shallow repository")),
  97         OPT_BOOL('n', "no-checkout", &option_no_checkout,
  98                  N_("don't create a checkout")),
  99         OPT_BOOL(0, "bare", &option_bare, N_("create a bare repository")),
 100         OPT_HIDDEN_BOOL(0, "naked", &option_bare,
 101                         N_("create a bare repository")),
 102         OPT_BOOL(0, "mirror", &option_mirror,
 103                  N_("create a mirror repository (implies bare)")),
 104         OPT_BOOL('l', "local", &option_local,
 105                 N_("to clone from a local repository")),
 106         OPT_BOOL(0, "no-hardlinks", &option_no_hardlinks,
 107                     N_("don't use local hardlinks, always copy")),
 108         OPT_BOOL('s', "shared", &option_shared,
 109                     N_("setup as shared repository")),
 110         { OPTION_CALLBACK, 0, "recurse-submodules", &option_recurse_submodules,
 111           N_("pathspec"), N_("initialize submodules in the clone"),
 112           PARSE_OPT_OPTARG, recurse_submodules_cb, (intptr_t)"." },
 113         OPT_ALIAS(0, "recursive", "recurse-submodules"),
 114         OPT_INTEGER('j', "jobs", &max_jobs,
 115                     N_("number of submodules cloned in parallel")),
 116         OPT_STRING(0, "template", &option_template, N_("template-directory"),
 117                    N_("directory from which templates will be used")),
 118         OPT_STRING_LIST(0, "reference", &option_required_reference, N_("repo"),
 119                         N_("reference repository")),
 120         OPT_STRING_LIST(0, "reference-if-able", &option_optional_reference,
 121                         N_("repo"), N_("reference repository")),
 122         OPT_BOOL(0, "dissociate", &option_dissociate,
 123                  N_("use --reference only while cloning")),
 124         OPT_STRING('o', "origin", &option_origin, N_("name"),
 125                    N_("use <name> instead of 'origin' to track upstream")),
 126         OPT_STRING('b', "branch", &option_branch, N_("branch"),
 127                    N_("checkout <branch> instead of the remote's HEAD")),
 128         OPT_STRING('u', "upload-pack", &option_upload_pack, N_("path"),
 129                    N_("path to git-upload-pack on the remote")),
 130         OPT_STRING(0, "depth", &option_depth, N_("depth"),
 131                     N_("create a shallow clone of that depth")),
 132         OPT_STRING(0, "shallow-since", &option_since, N_("time"),
 133                     N_("create a shallow clone since a specific time")),
 134         OPT_STRING_LIST(0, "shallow-exclude", &option_not, N_("revision"),
 135                         N_("deepen history of shallow clone, excluding rev")),
 136         OPT_BOOL(0, "single-branch", &option_single_branch,
 137                     N_("clone only one branch, HEAD or --branch")),
 138         OPT_BOOL(0, "no-tags", &option_no_tags,
 139                  N_("don't clone any tags, and make later fetches not to follow them")),
 140         OPT_BOOL(0, "shallow-submodules", &option_shallow_submodules,
 141                     N_("any cloned submodules will be shallow")),
 142         OPT_STRING(0, "separate-git-dir", &real_git_dir, N_("gitdir"),
 143                    N_("separate git dir from working tree")),
 144         OPT_STRING_LIST('c', "config", &option_config, N_("key=value"),
 145                         N_("set config inside the new repository")),
 146         OPT_STRING_LIST(0, "server-option", &server_options,
 147                         N_("server-specific"), N_("option to transmit")),
 148         OPT_SET_INT('4', "ipv4", &family, N_("use IPv4 addresses only"),
 149                         TRANSPORT_FAMILY_IPV4),
 150         OPT_SET_INT('6', "ipv6", &family, N_("use IPv6 addresses only"),
 151                         TRANSPORT_FAMILY_IPV6),
 152         OPT_PARSE_LIST_OBJECTS_FILTER(&filter_options),
 153         OPT_BOOL(0, "remote-submodules", &option_remote_submodules,
 154                     N_("any cloned submodules will use their remote-tracking branch")),
 155         OPT_BOOL(0, "sparse", &option_sparse_checkout,
 156                     N_("initialize sparse-checkout file to include only files at root")),
 157         OPT_END()
 158 };
 159
 160 static const char *get_repo_path_1(struct strbuf *path, int *is_bundle)
 161 {
 162         static char *suffix[] = { "/.git", "", ".git/.git", ".git" };
 163         static char *bundle_suffix[] = { ".bundle", "" };
 164         size_t baselen = path->len;
 165         struct stat st;
 166         int i;
 167
 168         for (i = 0; i < ARRAY_SIZE(suffix); i++) {
 169                 strbuf_setlen(path, baselen);
 170                 strbuf_addstr(path, suffix[i]);
 171                 if (stat(path->buf, &st))
 172                         continue;
 173                 if (S_ISDIR(st.st_mode) && is_git_directory(path->buf)) {
 174                         *is_bundle = 0;
 175                         return path->buf;
 176                 } else if (S_ISREG(st.st_mode) && st.st_size > 8) {
 177                         /* Is it a "gitfile"? */
 178                         char signature[8];
 179                         const char *dst;
 180                         int len, fd = open(path->buf, O_RDONLY);
 181                         if (fd < 0)
 182                                 continue;
 183                         len = read_in_full(fd, signature, 8);
 184                         close(fd);
 185                         if (len != 8 || strncmp(signature, "gitdir: ", 8))
 186                                 continue;
 187                         dst = read_gitfile(path->buf);
 188                         if (dst) {
 189                                 *is_bundle = 0;
 190                                 return dst;
 191                         }
 192                 }
 193         }
 194
 195         for (i = 0; i < ARRAY_SIZE(bundle_suffix); i++) {
 196                 strbuf_setlen(path, baselen);
 197                 strbuf_addstr(path, bundle_suffix[i]);
 198                 if (!stat(path->buf, &st) && S_ISREG(st.st_mode)) {
 199                         *is_bundle = 1;
 200                         return path->buf;
 201                 }
 202         }
 203
 204         return NULL;
 205 }
 206
 207 static char *get_repo_path(const char *repo, int *is_bundle)
 208 {
 209         struct strbuf path = STRBUF_INIT;
 210         const char *raw;
 211         char *canon;
 212
 213         strbuf_addstr(&path, repo);
 214         raw = get_repo_path_1(&path, is_bundle);
 215         canon = raw ? absolute_pathdup(raw) : NULL;
 216         strbuf_release(&path);
 217         return canon;
 218 }
 219
 220 static int add_one_reference(struct string_list_item *item, void *cb_data)
 221 {
 222         struct strbuf err = STRBUF_INIT;
 223         int *required = cb_data;
 224         char *ref_git = compute_alternate_path(item->string, &err);
 225
 226         if (!ref_git) {
 227                 if (*required)
 228                         die("%s", err.buf);
 229                 else
 230                         fprintf(stderr,
 231                                 _("info: Could not add alternate for '%s': %s\n"),
 232                                 item->string, err.buf);
 233         } else {
 234                 struct strbuf sb = STRBUF_INIT;
 235                 strbuf_addf(&sb, "%s/objects", ref_git);
 236                 add_to_alternates_file(sb.buf);
 237                 strbuf_release(&sb);
 238         }
 239
 240         strbuf_release(&err);
 241         free(ref_git);
 242         return 0;
 243 }
 244
 245 static void setup_reference(void)
 246 {
 247         int required = 1;
 248         for_each_string_list(&option_required_reference,
 249                              add_one_reference, &required);
 250         required = 0;
 251         for_each_string_list(&option_optional_reference,
 252                              add_one_reference, &required);
 253 }
 254
 255 static void copy_alternates(struct strbuf *src, const char *src_repo)
 256 {
 257         /*
 258          * Read from the source objects/info/alternates file
 259          * and copy the entries to corresponding file in the
 260          * destination repository with add_to_alternates_file().
 261          * Both src and dst have "$path/objects/info/alternates".
 262          *
 263          * Instead of copying bit-for-bit from the original,
 264          * we need to append to existing one so that the already
 265          * created entry via "clone -s" is not lost, and also
 266          * to turn entries with paths relative to the original
 267          * absolute, so that they can be used in the new repository.
 268          */
 269         FILE *in = xfopen(src->buf, "r");
 270         struct strbuf line = STRBUF_INIT;
 271
 272         while (strbuf_getline(&line, in) != EOF) {
 273                 char *abs_path;
 274                 if (!line.len || line.buf[0] == '#')
 275                         continue;
 276                 if (is_absolute_path(line.buf)) {
 277                         add_to_alternates_file(line.buf);
 278                         continue;
 279                 }
 280                 abs_path = mkpathdup("%s/objects/%s", src_repo, line.buf);
 281                 if (!normalize_path_copy(abs_path, abs_path))
 282                         add_to_alternates_file(abs_path);
 283                 else
 284                         warning("skipping invalid relative alternate: %s/%s",
 285                                 src_repo, line.buf);
 286                 free(abs_path);
 287         }
 288         strbuf_release(&line);
 289         fclose(in);
 290 }
 291
 292 static void mkdir_if_missing(const char *pathname, mode_t mode)
 293 {
 294         struct stat st;
 295
 296         if (!mkdir(pathname, mode))
 297                 return;
 298
 299         if (errno != EEXIST)
 300                 die_errno(_("failed to create directory '%s'"), pathname);
 301         else if (stat(pathname, &st))
 302                 die_errno(_("failed to stat '%s'"), pathname);
 303         else if (!S_ISDIR(st.st_mode))
 304                 die(_("%s exists and is not a directory"), pathname);
 305 }
 306
 307 static void copy_or_link_directory(struct strbuf *src, struct strbuf *dest,
 308                                    const char *src_repo)
 309 {
 310         int src_len, dest_len;
 311         struct dir_iterator *iter;
 312         int iter_status;
 313         struct strbuf realpath = STRBUF_INIT;
 314
 315         mkdir_if_missing(dest->buf, 0777);
 316
 317         iter = dir_iterator_begin(src->buf, DIR_ITERATOR_PEDANTIC);
 318
 319         if (!iter)
 320                 die_errno(_("failed to start iterator over '%s'"), src->buf);
 321
 322         strbuf_addch(src, '/');
 323         src_len = src->len;
 324         strbuf_addch(dest, '/');
 325         dest_len = dest->len;
 326
 327         while ((iter_status = dir_iterator_advance(iter)) == ITER_OK) {
 328                 strbuf_setlen(src, src_len);
 329                 strbuf_addstr(src, iter->relative_path);
 330                 strbuf_setlen(dest, dest_len);
 331                 strbuf_addstr(dest, iter->relative_path);
 332
 333                 if (S_ISLNK(iter->st.st_mode))
 334                         die(_("symlink '%s' exists, refusing to clone with --local"),
 335                             iter->relative_path);
 336
 337                 if (S_ISDIR(iter->st.st_mode)) {
 338                         mkdir_if_missing(dest->buf, 0777);
 339                         continue;
 340                 }
 341
 342                 /* Files that cannot be copied bit-for-bit... */
 343                 if (!fspathcmp(iter->relative_path, "info/alternates")) {
 344                         copy_alternates(src, src_repo);
 345                         continue;
 346                 }
 347
 348                 if (unlink(dest->buf) && errno != ENOENT)
 349                         die_errno(_("failed to unlink '%s'"), dest->buf);
 350                 if (!option_no_hardlinks) {
 351                         strbuf_realpath(&realpath, src->buf, 1);
 352                         if (!link(realpath.buf, dest->buf))
 353                                 continue;
 354                         if (option_local > 0)
 355                                 die_errno(_("failed to create link '%s'"), dest->buf);
 356                         option_no_hardlinks = 1;
 357                 }
 358                 if (copy_file_with_time(dest->buf, src->buf, 0666))
 359                         die_errno(_("failed to copy file to '%s'"), dest->buf);
 360         }
 361
 362         if (iter_status != ITER_DONE) {
 363                 strbuf_setlen(src, src_len);
 364                 die(_("failed to iterate over '%s'"), src->buf);
 365         }
 366
 367         strbuf_release(&realpath);
 368 }
 369
 370 static void clone_local(const char *src_repo, const char *dest_repo)
 371 {
 372         if (option_shared) {
 373                 struct strbuf alt = STRBUF_INIT;
 374                 get_common_dir(&alt, src_repo);
 375                 strbuf_addstr(&alt, "/objects");
 376                 add_to_alternates_file(alt.buf);
 377                 strbuf_release(&alt);
 378         } else {
 379                 struct strbuf src = STRBUF_INIT;
 380                 struct strbuf dest = STRBUF_INIT;
 381                 get_common_dir(&src, src_repo);
 382                 get_common_dir(&dest, dest_repo);
 383                 strbuf_addstr(&src, "/objects");
 384                 strbuf_addstr(&dest, "/objects");
 385                 copy_or_link_directory(&src, &dest, src_repo);
 386                 strbuf_release(&src);
 387                 strbuf_release(&dest);
 388         }
 389
 390         if (0 <= option_verbosity)
 391                 fprintf(stderr, _("done.\n"));
 392 }
 393
 394 static const char *junk_work_tree;
 395 static int junk_work_tree_flags;
 396 static const char *junk_git_dir;
 397 static int junk_git_dir_flags;
 398 static enum {
 399         JUNK_LEAVE_NONE,
 400         JUNK_LEAVE_REPO,
 401         JUNK_LEAVE_ALL
 402 } junk_mode = JUNK_LEAVE_NONE;
 403
 404 static const char junk_leave_repo_msg[] =
 405 N_("Clone succeeded, but checkout failed.\n"
 406    "You can inspect what was checked out with 'git status'\n"
 407    "and retry with 'git restore --source=HEAD :/'\n");
 408
 409 static void remove_junk(void)
 410 {
 411         struct strbuf sb = STRBUF_INIT;
 412
 413         switch (junk_mode) {
 414         case JUNK_LEAVE_REPO:
 415                 warning("%s", _(junk_leave_repo_msg));
 416                 /* fall-through */
 417         case JUNK_LEAVE_ALL:
 418                 return;
 419         default:
 420                 /* proceed to removal */
 421                 break;
 422         }
 423
 424         if (junk_git_dir) {
 425                 strbuf_addstr(&sb, junk_git_dir);
 426                 remove_dir_recursively(&sb, junk_git_dir_flags);
 427                 strbuf_reset(&sb);
 428         }
 429         if (junk_work_tree) {
 430                 strbuf_addstr(&sb, junk_work_tree);
 431                 remove_dir_recursively(&sb, junk_work_tree_flags);
 432         }
 433         strbuf_release(&sb);
 434 }
 435
 436 static void remove_junk_on_signal(int signo)
 437 {
 438         remove_junk();
 439         sigchain_pop(signo);
 440         raise(signo);
 441 }
 442
 443 static struct ref *find_remote_branch(const struct ref *refs, const char *branch)
 444 {
 445         struct ref *ref;
 446         struct strbuf head = STRBUF_INIT;
 447         strbuf_addstr(&head, "refs/heads/");
 448         strbuf_addstr(&head, branch);
 449         ref = find_ref_by_name(refs, head.buf);
 450         strbuf_release(&head);
 451
 452         if (ref)
 453                 return ref;
 454
 455         strbuf_addstr(&head, "refs/tags/");
 456         strbuf_addstr(&head, branch);
 457         ref = find_ref_by_name(refs, head.buf);
 458         strbuf_release(&head);
 459
 460         return ref;
 461 }
 462
 463 static struct ref *wanted_peer_refs(const struct ref *refs,
 464                 struct refspec *refspec)
 465 {
 466         struct ref *head = copy_ref(find_ref_by_name(refs, "HEAD"));
 467         struct ref *local_refs = head;
 468         struct ref **tail = head ? &head->next : &local_refs;
 469
 470         if (option_single_branch) {
 471                 struct ref *remote_head = NULL;
 472
 473                 if (!option_branch)
 474                         remote_head = guess_remote_head(head, refs, 0);
 475                 else {
 476                         local_refs = NULL;
 477                         tail = &local_refs;
 478                         remote_head = copy_ref(find_remote_branch(refs, option_branch));
 479                 }
 480
 481                 if (!remote_head && option_branch)
 482                         warning(_("Could not find remote branch %s to clone."),
 483                                 option_branch);
 484                 else {
 485                         int i;
 486                         for (i = 0; i < refspec->nr; i++)
 487                                 get_fetch_map(remote_head, &refspec->items[i],
 488                                               &tail, 0);
 489
 490                         /* if --branch=tag, pull the requested tag explicitly */
 491                         get_fetch_map(remote_head, tag_refspec, &tail, 0);
 492                 }
 493         } else {
 494                 int i;
 495                 for (i = 0; i < refspec->nr; i++)
 496                         get_fetch_map(refs, &refspec->items[i], &tail, 0);
 497         }
 498
 499         if (!option_mirror && !option_single_branch && !option_no_tags)
 500                 get_fetch_map(refs, tag_refspec, &tail, 0);
 501
 502         return local_refs;
 503 }
 504
 505 static void write_remote_refs(const struct ref *local_refs)
 506 {
 507         const struct ref *r;
 508
 509         struct ref_transaction *t;
 510         struct strbuf err = STRBUF_INIT;
 511
 512         t = ref_transaction_begin(&err);
 513         if (!t)
 514                 die("%s", err.buf);
 515
 516         for (r = local_refs; r; r = r->next) {
 517                 if (!r->peer_ref)
 518                         continue;
 519                 if (ref_transaction_create(t, r->peer_ref->name, &r->old_oid,
 520                                            0, NULL, &err))
 521                         die("%s", err.buf);
 522         }
 523
 524         if (initial_ref_transaction_commit(t, &err))
 525                 die("%s", err.buf);
 526
 527         strbuf_release(&err);
 528         ref_transaction_free(t);
 529 }
 530
 531 static void write_followtags(const struct ref *refs, const char *msg)
 532 {
 533         const struct ref *ref;
 534         for (ref = refs; ref; ref = ref->next) {
 535                 if (!starts_with(ref->name, "refs/tags/"))
 536                         continue;
 537                 if (ends_with(ref->name, "^{}"))
 538                         continue;
 539                 if (!has_object_file_with_flags(&ref->old_oid,
 540                                                 OBJECT_INFO_QUICK |
 541                                                 OBJECT_INFO_SKIP_FETCH_OBJECT))
 542                         continue;
 543                 update_ref(msg, ref->name, &ref->old_oid, NULL, 0,
 544                            UPDATE_REFS_DIE_ON_ERR);
 545         }
 546 }
 547
 548 static const struct object_id *iterate_ref_map(void *cb_data)
 549 {
 550         struct ref **rm = cb_data;
 551         struct ref *ref = *rm;
 552
 553         /*
 554          * Skip anything missing a peer_ref, which we are not
 555          * actually going to write a ref for.
 556          */
 557         while (ref && !ref->peer_ref)
 558                 ref = ref->next;
 559         if (!ref)
 560                 return NULL;
 561
 562         *rm = ref->next;
 563         return &ref->old_oid;
 564 }
 565
 566 static void update_remote_refs(const struct ref *refs,
 567                                const struct ref *mapped_refs,
 568                                const struct ref *remote_head_points_at,
 569                                const char *branch_top,
 570                                const char *msg,
 571                                struct transport *transport,
 572                                int check_connectivity)
 573 {
 574         const struct ref *rm = mapped_refs;
 575
 576         if (check_connectivity) {
 577                 struct check_connected_options opt = CHECK_CONNECTED_INIT;
 578
 579                 opt.transport = transport;
 580                 opt.progress = transport->progress;
 581
 582                 if (check_connected(iterate_ref_map, &rm, &opt))
 583                         die(_("remote did not send all necessary objects"));
 584         }
 585
 586         if (refs) {
 587                 write_remote_refs(mapped_refs);
 588                 if (option_single_branch && !option_no_tags)
 589                         write_followtags(refs, msg);
 590         }
 591
 592         if (remote_head_points_at && !option_bare) {
 593                 struct strbuf head_ref = STRBUF_INIT;
 594                 strbuf_addstr(&head_ref, branch_top);
 595                 strbuf_addstr(&head_ref, "HEAD");
 596                 if (create_symref(head_ref.buf,
 597                                   remote_head_points_at->peer_ref->name,
 598                                   msg) < 0)
 599                         die(_("unable to update %s"), head_ref.buf);
 600                 strbuf_release(&head_ref);
 601         }
 602 }
 603
 604 static void update_head(const struct ref *our, const struct ref *remote,
 605                         const char *msg)
 606 {
 607         const char *head;
 608         if (our && skip_prefix(our->name, "refs/heads/", &head)) {
 609                 /* Local default branch link */
 610                 if (create_symref("HEAD", our->name, NULL) < 0)
 611                         die(_("unable to update HEAD"));
 612                 if (!option_bare) {
 613                         update_ref(msg, "HEAD", &our->old_oid, NULL, 0,
 614                                    UPDATE_REFS_DIE_ON_ERR);
 615                         install_branch_config(0, head, remote_name, our->name);
 616                 }
 617         } else if (our) {
 618                 struct commit *c = lookup_commit_reference(the_repository,
 619                                                            &our->old_oid);
 620                 /* --branch specifies a non-branch (i.e. tags), detach HEAD */
 621                 update_ref(msg, "HEAD", &c->object.oid, NULL, REF_NO_DEREF,
 622                            UPDATE_REFS_DIE_ON_ERR);
 623         } else if (remote) {
 624                 /*
 625                  * We know remote HEAD points to a non-branch, or
 626                  * HEAD points to a branch but we don't know which one.
 627                  * Detach HEAD in all these cases.
 628                  */
 629                 update_ref(msg, "HEAD", &remote->old_oid, NULL, REF_NO_DEREF,
 630                            UPDATE_REFS_DIE_ON_ERR);
 631         }
 632 }
 633
 634 static int git_sparse_checkout_init(const char *repo)
 635 {
 636         struct strvec argv = STRVEC_INIT;
 637         int result = 0;
 638         strvec_pushl(&argv, "-C", repo, "sparse-checkout", "set", NULL);
 639
 640         /*
 641          * We must apply the setting in the current process
 642          * for the later checkout to use the sparse-checkout file.
 643          */
 644         core_apply_sparse_checkout = 1;
 645
 646         if (run_command_v_opt(argv.v, RUN_GIT_CMD)) {
 647                 error(_("failed to initialize sparse-checkout"));
 648                 result = 1;
 649         }
 650
 651         strvec_clear(&argv);
 652         return result;
 653 }
 654
 655 static int checkout(int submodule_progress)
 656 {
 657         struct object_id oid;
 658         char *head;
 659         struct lock_file lock_file = LOCK_INIT;
 660         struct unpack_trees_options opts;
 661         struct tree *tree;
 662         struct tree_desc t;
 663         int err = 0;
 664
 665         if (option_no_checkout)
 666                 return 0;
 667
 668         head = resolve_refdup("HEAD", RESOLVE_REF_READING, &oid, NULL);
 669         if (!head) {
 670                 warning(_("remote HEAD refers to nonexistent ref, "
 671                           "unable to checkout.\n"));
 672                 return 0;
 673         }
 674         if (!strcmp(head, "HEAD")) {
 675                 if (advice_enabled(ADVICE_DETACHED_HEAD))
 676                         detach_advice(oid_to_hex(&oid));
 677                 FREE_AND_NULL(head);
 678         } else {
 679                 if (!starts_with(head, "refs/heads/"))
 680                         die(_("HEAD not found below refs/heads!"));
 681         }
 682
 683         /* We need to be in the new work tree for the checkout */
 684         setup_work_tree();
 685
 686         hold_locked_index(&lock_file, LOCK_DIE_ON_ERROR);
 687
 688         memset(&opts, 0, sizeof opts);
 689         opts.update = 1;
 690         opts.merge = 1;
 691         opts.clone = 1;
 692         opts.preserve_ignored = 0;
 693         opts.fn = oneway_merge;
 694         opts.verbose_update = (option_verbosity >= 0);
 695         opts.src_index = &the_index;
 696         opts.dst_index = &the_index;
 697         init_checkout_metadata(&opts.meta, head, &oid, NULL);
 698
 699         tree = parse_tree_indirect(&oid);
 700         parse_tree(tree);
 701         init_tree_desc(&t, tree->buffer, tree->size);
 702         if (unpack_trees(1, &t, &opts) < 0)
 703                 die(_("unable to checkout working tree"));
 704
 705         free(head);
 706
 707         if (write_locked_index(&the_index, &lock_file, COMMIT_LOCK))
 708                 die(_("unable to write new index file"));
 709
 710         err |= run_hook_le(NULL, "post-checkout", oid_to_hex(null_oid()),
 711                            oid_to_hex(&oid), "1", NULL);
 712
 713         if (!err && (option_recurse_submodules.nr > 0)) {
 714                 struct strvec args = STRVEC_INIT;
 715                 strvec_pushl(&args, "submodule", "update", "--require-init", "--recursive", NULL);
 716
 717                 if (option_shallow_submodules == 1)
 718                         strvec_push(&args, "--depth=1");
 719
 720                 if (max_jobs != -1)
 721                         strvec_pushf(&args, "--jobs=%d", max_jobs);
 722
 723                 if (submodule_progress)
 724                         strvec_push(&args, "--progress");
 725
 726                 if (option_verbosity < 0)
 727                         strvec_push(&args, "--quiet");
 728
 729                 if (option_remote_submodules) {
 730                         strvec_push(&args, "--remote");
 731                         strvec_push(&args, "--no-fetch");
 732                 }
 733
 734                 if (option_single_branch >= 0)
 735                         strvec_push(&args, option_single_branch ?
 736                                                "--single-branch" :
 737                                                "--no-single-branch");
 738
 739                 err = run_command_v_opt(args.v, RUN_GIT_CMD);
 740                 strvec_clear(&args);
 741         }
 742
 743         return err;
 744 }
 745
 746 static int git_clone_config(const char *k, const char *v, void *cb)
 747 {
 748         if (!strcmp(k, "clone.defaultremotename")) {
 749                 free(remote_name);
 750                 remote_name = xstrdup(v);
 751         }
 752         if (!strcmp(k, "clone.rejectshallow"))
 753                 config_reject_shallow = git_config_bool(k, v);
 754
 755         return git_default_config(k, v, cb);
 756 }
 757
 758 static int write_one_config(const char *key, const char *value, void *data)
 759 {
 760         /*
 761          * give git_clone_config a chance to write config values back to the
 762          * environment, since git_config_set_multivar_gently only deals with
 763          * config-file writes
 764          */
 765         int apply_failed = git_clone_config(key, value, data);
 766         if (apply_failed)
 767                 return apply_failed;
 768
 769         return git_config_set_multivar_gently(key,
 770                                               value ? value : "true",
 771                                               CONFIG_REGEX_NONE, 0);
 772 }
 773
 774 static void write_config(struct string_list *config)
 775 {
 776         int i;
 777
 778         for (i = 0; i < config->nr; i++) {
 779                 if (git_config_parse_parameter(config->items[i].string,
 780                                                write_one_config, NULL) < 0)
 781                         die(_("unable to write parameters to config file"));
 782         }
 783 }
 784
 785 static void write_refspec_config(const char *src_ref_prefix,
 786                 const struct ref *our_head_points_at,
 787                 const struct ref *remote_head_points_at,
 788                 struct strbuf *branch_top)
 789 {
 790         struct strbuf key = STRBUF_INIT;
 791         struct strbuf value = STRBUF_INIT;
 792
 793         if (option_mirror || !option_bare) {
 794                 if (option_single_branch && !option_mirror) {
 795                         if (option_branch) {
 796                                 if (starts_with(our_head_points_at->name, "refs/tags/"))
 797                                         strbuf_addf(&value, "+%s:%s", our_head_points_at->name,
 798                                                 our_head_points_at->name);
 799                                 else
 800                                         strbuf_addf(&value, "+%s:%s%s", our_head_points_at->name,
 801                                                 branch_top->buf, option_branch);
 802                         } else if (remote_head_points_at) {
 803                                 const char *head = remote_head_points_at->name;
 804                                 if (!skip_prefix(head, "refs/heads/", &head))
 805                                         BUG("remote HEAD points at non-head?");
 806
 807                                 strbuf_addf(&value, "+%s:%s%s", remote_head_points_at->name,
 808                                                 branch_top->buf, head);
 809                         }
 810                         /*
 811                          * otherwise, the next "git fetch" will
 812                          * simply fetch from HEAD without updating
 813                          * any remote-tracking branch, which is what
 814                          * we want.
 815                          */
 816                 } else {
 817                         strbuf_addf(&value, "+%s*:%s*", src_ref_prefix, branch_top->buf);
 818                 }
 819                 /* Configure the remote */
 820                 if (value.len) {
 821                         strbuf_addf(&key, "remote.%s.fetch", remote_name);
 822                         git_config_set_multivar(key.buf, value.buf, "^$", 0);
 823                         strbuf_reset(&key);
 824
 825                         if (option_mirror) {
 826                                 strbuf_addf(&key, "remote.%s.mirror", remote_name);
 827                                 git_config_set(key.buf, "true");
 828                                 strbuf_reset(&key);
 829                         }
 830                 }
 831         }
 832
 833         strbuf_release(&key);
 834         strbuf_release(&value);
 835 }
 836
 837 static void dissociate_from_references(void)
 838 {
 839         static const char* argv[] = { "repack", "-a", "-d", NULL };
 840         char *alternates = git_pathdup("objects/info/alternates");
 841
 842         if (!access(alternates, F_OK)) {
 843                 if (run_command_v_opt(argv, RUN_GIT_CMD|RUN_COMMAND_NO_STDIN))
 844                         die(_("cannot repack to clean up"));
 845                 if (unlink(alternates) && errno != ENOENT)
 846                         die_errno(_("cannot unlink temporary alternates file"));
 847         }
 848         free(alternates);
 849 }
 850
 851 static int path_exists(const char *path)
 852 {
 853         struct stat sb;
 854         return !stat(path, &sb);
 855 }
 856
 857 int cmd_clone(int argc, const char **argv, const char *prefix)
 858 {
 859         int is_bundle = 0, is_local;
 860         int reject_shallow = 0;
 861         const char *repo_name, *repo, *work_tree, *git_dir;
 862         char *path = NULL, *dir, *display_repo = NULL;
 863         int dest_exists, real_dest_exists = 0;
 864         const struct ref *refs, *remote_head;
 865         struct ref *remote_head_points_at = NULL;
 866         const struct ref *our_head_points_at;
 867         struct ref *mapped_refs;
 868         const struct ref *ref;
 869         struct strbuf key = STRBUF_INIT;
 870         struct strbuf branch_top = STRBUF_INIT, reflog_msg = STRBUF_INIT;
 871         struct transport *transport = NULL;
 872         const char *src_ref_prefix = "refs/heads/";
 873         struct remote *remote;
 874         int err = 0, complete_refs_before_fetch = 1;
 875         int submodule_progress;
 876
 877         struct transport_ls_refs_options transport_ls_refs_options =
 878                 TRANSPORT_LS_REFS_OPTIONS_INIT;
 879
 880         packet_trace_identity("clone");
 881
 882         git_config(git_clone_config, NULL);
 883
 884         argc = parse_options(argc, argv, prefix, builtin_clone_options,
 885                              builtin_clone_usage, 0);
 886
 887         if (argc > 2)
 888                 usage_msg_opt(_("Too many arguments."),
 889                         builtin_clone_usage, builtin_clone_options);
 890
 891         if (argc == 0)
 892                 usage_msg_opt(_("You must specify a repository to clone."),
 893                         builtin_clone_usage, builtin_clone_options);
 894
 895         if (option_depth || option_since || option_not.nr)
 896                 deepen = 1;
 897         if (option_single_branch == -1)
 898                 option_single_branch = deepen ? 1 : 0;
 899
 900         if (option_mirror)
 901                 option_bare = 1;
 902
 903         if (option_bare) {
 904                 if (option_origin)
 905                         die(_("options '%s' and '%s %s' cannot be used together"),
 906                             "--bare", "--origin", option_origin);
 907                 if (real_git_dir)
 908                         die(_("options '%s' and '%s' cannot be used together"), "--bare", "--separate-git-dir");
 909                 option_no_checkout = 1;
 910         }
 911
 912         repo_name = argv[0];
 913
 914         path = get_repo_path(repo_name, &is_bundle);
 915         if (path) {
 916                 FREE_AND_NULL(path);
 917                 repo = absolute_pathdup(repo_name);
 918         } else if (strchr(repo_name, ':')) {
 919                 repo = repo_name;
 920                 display_repo = transport_anonymize_url(repo);
 921         } else
 922                 die(_("repository '%s' does not exist"), repo_name);
 923
 924         /* no need to be strict, transport_set_option() will validate it again */
 925         if (option_depth && atoi(option_depth) < 1)
 926                 die(_("depth %s is not a positive number"), option_depth);
 927
 928         if (argc == 2)
 929                 dir = xstrdup(argv[1]);
 930         else
 931                 dir = git_url_basename(repo_name, is_bundle, option_bare);
 932         strip_dir_trailing_slashes(dir);
 933
 934         dest_exists = path_exists(dir);
 935         if (dest_exists && !is_empty_dir(dir))
 936                 die(_("destination path '%s' already exists and is not "
 937                         "an empty directory."), dir);
 938
 939         if (real_git_dir) {
 940                 real_dest_exists = path_exists(real_git_dir);
 941                 if (real_dest_exists && !is_empty_dir(real_git_dir))
 942                         die(_("repository path '%s' already exists and is not "
 943                                 "an empty directory."), real_git_dir);
 944         }
 945
 946
 947         strbuf_addf(&reflog_msg, "clone: from %s",
 948                     display_repo ? display_repo : repo);
 949         free(display_repo);
 950
 951         if (option_bare)
 952                 work_tree = NULL;
 953         else {
 954                 work_tree = getenv("GIT_WORK_TREE");
 955                 if (work_tree && path_exists(work_tree))
 956                         die(_("working tree '%s' already exists."), work_tree);
 957         }
 958
 959         if (option_bare || work_tree)
 960                 git_dir = xstrdup(dir);
 961         else {
 962                 work_tree = dir;
 963                 git_dir = mkpathdup("%s/.git", dir);
 964         }
 965
 966         atexit(remove_junk);
 967         sigchain_push_common(remove_junk_on_signal);
 968
 969         if (!option_bare) {
 970                 if (safe_create_leading_directories_const(work_tree) < 0)
 971                         die_errno(_("could not create leading directories of '%s'"),
 972                                   work_tree);
 973                 if (dest_exists)
 974                         junk_work_tree_flags |= REMOVE_DIR_KEEP_TOPLEVEL;
 975                 else if (mkdir(work_tree, 0777))
 976                         die_errno(_("could not create work tree dir '%s'"),
 977                                   work_tree);
 978                 junk_work_tree = work_tree;
 979                 set_git_work_tree(work_tree);
 980         }
 981
 982         if (real_git_dir) {
 983                 if (real_dest_exists)
 984                         junk_git_dir_flags |= REMOVE_DIR_KEEP_TOPLEVEL;
 985                 junk_git_dir = real_git_dir;
 986         } else {
 987                 if (dest_exists)
 988                         junk_git_dir_flags |= REMOVE_DIR_KEEP_TOPLEVEL;
 989                 junk_git_dir = git_dir;
 990         }
 991         if (safe_create_leading_directories_const(git_dir) < 0)
 992                 die(_("could not create leading directories of '%s'"), git_dir);
 993
 994         if (0 <= option_verbosity) {
 995                 if (option_bare)
 996                         fprintf(stderr, _("Cloning into bare repository '%s'...\n"), dir);
 997                 else
 998                         fprintf(stderr, _("Cloning into '%s'...\n"), dir);
 999         }
1000
1001         if (option_recurse_submodules.nr > 0) {
1002                 struct string_list_item *item;
1003                 struct strbuf sb = STRBUF_INIT;
1004                 int val;
1005
1006                 /* remove duplicates */
1007                 string_list_sort(&option_recurse_submodules);
1008                 string_list_remove_duplicates(&option_recurse_submodules, 0);
1009
1010                 /*
1011                  * NEEDSWORK: In a multi-working-tree world, this needs to be
1012                  * set in the per-worktree config.
1013                  */
1014                 for_each_string_list_item(item, &option_recurse_submodules) {
1015                         strbuf_addf(&sb, "submodule.active=%s",
1016                                     item->string);
1017                         string_list_append(&option_config,
1018                                            strbuf_detach(&sb, NULL));
1019                 }
1020
1021                 if (!git_config_get_bool("submodule.stickyRecursiveClone", &val) &&
1022                     val)
1023                         string_list_append(&option_config, "submodule.recurse=true");
1024
1025                 if (option_required_reference.nr &&
1026                     option_optional_reference.nr)
1027                         die(_("clone --recursive is not compatible with "
1028                               "both --reference and --reference-if-able"));
1029                 else if (option_required_reference.nr) {
1030                         string_list_append(&option_config,
1031                                 "submodule.alternateLocation=superproject");
1032                         string_list_append(&option_config,
1033                                 "submodule.alternateErrorStrategy=die");
1034                 } else if (option_optional_reference.nr) {
1035                         string_list_append(&option_config,
1036                                 "submodule.alternateLocation=superproject");
1037                         string_list_append(&option_config,
1038                                 "submodule.alternateErrorStrategy=info");
1039                 }
1040         }
1041
1042         init_db(git_dir, real_git_dir, option_template, GIT_HASH_UNKNOWN, NULL,
1043                 INIT_DB_QUIET);
1044
1045         if (real_git_dir) {
1046                 free((char *)git_dir);
1047                 git_dir = real_git_dir;
1048         }
1049
1050         /*
1051          * additional config can be injected with -c, make sure it's included
1052          * after init_db, which clears the entire config environment.
1053          */
1054         write_config(&option_config);
1055
1056         /*
1057          * re-read config after init_db and write_config to pick up any config
1058          * injected by --template and --config, respectively.
1059          */
1060         git_config(git_clone_config, NULL);
1061
1062         /*
1063          * If option_reject_shallow is specified from CLI option,
1064          * ignore config_reject_shallow from git_clone_config.
1065          */
1066         if (config_reject_shallow != -1)
1067                 reject_shallow = config_reject_shallow;
1068         if (option_reject_shallow != -1)
1069                 reject_shallow = option_reject_shallow;
1070
1071         /*
1072          * apply the remote name provided by --origin only after this second
1073          * call to git_config, to ensure it overrides all config-based values.
1074          */
1075         if (option_origin != NULL)
1076                 remote_name = xstrdup(option_origin);
1077
1078         if (remote_name == NULL)
1079                 remote_name = xstrdup("origin");
1080
1081         if (!valid_remote_name(remote_name))
1082                 die(_("'%s' is not a valid remote name"), remote_name);
1083
1084         if (option_bare) {
1085                 if (option_mirror)
1086                         src_ref_prefix = "refs/";
1087                 strbuf_addstr(&branch_top, src_ref_prefix);
1088
1089                 git_config_set("core.bare", "true");
1090         } else {
1091                 strbuf_addf(&branch_top, "refs/remotes/%s/", remote_name);
1092         }
1093
1094         strbuf_addf(&key, "remote.%s.url", remote_name);
1095         git_config_set(key.buf, repo);
1096         strbuf_reset(&key);
1097
1098         if (option_no_tags) {
1099                 strbuf_addf(&key, "remote.%s.tagOpt", remote_name);
1100                 git_config_set(key.buf, "--no-tags");
1101                 strbuf_reset(&key);
1102         }
1103
1104         if (option_required_reference.nr || option_optional_reference.nr)
1105                 setup_reference();
1106
1107         if (option_sparse_checkout && git_sparse_checkout_init(dir))
1108                 return 1;
1109
1110         remote = remote_get(remote_name);
1111
1112         refspec_appendf(&remote->fetch, "+%s*:%s*", src_ref_prefix,
1113                         branch_top.buf);
1114
1115         transport = transport_get(remote, remote->url[0]);
1116         transport_set_verbosity(transport, option_verbosity, option_progress);
1117         transport->family = family;
1118
1119         path = get_repo_path(remote->url[0], &is_bundle);
1120         is_local = option_local != 0 && path && !is_bundle;
1121         if (is_local) {
1122                 if (option_depth)
1123                         warning(_("--depth is ignored in local clones; use file:// instead."));
1124                 if (option_since)
1125                         warning(_("--shallow-since is ignored in local clones; use file:// instead."));
1126                 if (option_not.nr)
1127                         warning(_("--shallow-exclude is ignored in local clones; use file:// instead."));
1128                 if (filter_options.choice)
1129                         warning(_("--filter is ignored in local clones; use file:// instead."));
1130                 if (!access(mkpath("%s/shallow", path), F_OK)) {
1131                         if (reject_shallow)
1132                                 die(_("source repository is shallow, reject to clone."));
1133                         if (option_local > 0)
1134                                 warning(_("source repository is shallow, ignoring --local"));
1135                         is_local = 0;
1136                 }
1137         }
1138         if (option_local > 0 && !is_local)
1139                 warning(_("--local is ignored"));
1140         transport->cloning = 1;
1141
1142         transport_set_option(transport, TRANS_OPT_KEEP, "yes");
1143
1144         if (reject_shallow)
1145                 transport_set_option(transport, TRANS_OPT_REJECT_SHALLOW, "1");
1146         if (option_depth)
1147                 transport_set_option(transport, TRANS_OPT_DEPTH,
1148                                      option_depth);
1149         if (option_since)
1150                 transport_set_option(transport, TRANS_OPT_DEEPEN_SINCE,
1151                                      option_since);
1152         if (option_not.nr)
1153                 transport_set_option(transport, TRANS_OPT_DEEPEN_NOT,
1154                                      (const char *)&option_not);
1155         if (option_single_branch)
1156                 transport_set_option(transport, TRANS_OPT_FOLLOWTAGS, "1");
1157
1158         if (option_upload_pack)
1159                 transport_set_option(transport, TRANS_OPT_UPLOADPACK,
1160                                      option_upload_pack);
1161
1162         if (server_options.nr)
1163                 transport->server_options = &server_options;
1164
1165         if (filter_options.choice) {
1166                 const char *spec =
1167                         expand_list_objects_filter_spec(&filter_options);
1168                 transport_set_option(transport, TRANS_OPT_LIST_OBJECTS_FILTER,
1169                                      spec);
1170                 transport_set_option(transport, TRANS_OPT_FROM_PROMISOR, "1");
1171         }
1172
1173         if (transport->smart_options && !deepen && !filter_options.choice)
1174                 transport->smart_options->check_self_contained_and_connected = 1;
1175
1176
1177         strvec_push(&transport_ls_refs_options.ref_prefixes, "HEAD");
1178         refspec_ref_prefixes(&remote->fetch,
1179                              &transport_ls_refs_options.ref_prefixes);
1180         if (option_branch)
1181                 expand_ref_prefix(&transport_ls_refs_options.ref_prefixes,
1182                                   option_branch);
1183         if (!option_no_tags)
1184                 strvec_push(&transport_ls_refs_options.ref_prefixes,
1185                             "refs/tags/");
1186
1187         refs = transport_get_remote_refs(transport, &transport_ls_refs_options);
1188
1189         if (refs) {
1190                 int hash_algo = hash_algo_by_ptr(transport_get_hash_algo(transport));
1191
1192                 /*
1193                  * Now that we know what algorithm the remote side is using,
1194                  * let's set ours to the same thing.
1195                  */
1196                 initialize_repository_version(hash_algo, 1);
1197                 repo_set_hash_algo(the_repository, hash_algo);
1198
1199                 mapped_refs = wanted_peer_refs(refs, &remote->fetch);
1200                 /*
1201                  * transport_get_remote_refs() may return refs with null sha-1
1202                  * in mapped_refs (see struct transport->get_refs_list
1203                  * comment). In that case we need fetch it early because
1204                  * remote_head code below relies on it.
1205                  *
1206                  * for normal clones, transport_get_remote_refs() should
1207                  * return reliable ref set, we can delay cloning until after
1208                  * remote HEAD check.
1209                  */
1210                 for (ref = refs; ref; ref = ref->next)
1211                         if (is_null_oid(&ref->old_oid)) {
1212                                 complete_refs_before_fetch = 0;
1213                                 break;
1214                         }
1215
1216                 if (!is_local && !complete_refs_before_fetch) {
1217                         if (transport_fetch_refs(transport, mapped_refs))
1218                                 die(_("remote transport reported error"));
1219                 }
1220
1221                 remote_head = find_ref_by_name(refs, "HEAD");
1222                 remote_head_points_at =
1223                         guess_remote_head(remote_head, mapped_refs, 0);
1224
1225                 if (option_branch) {
1226                         our_head_points_at =
1227                                 find_remote_branch(mapped_refs, option_branch);
1228
1229                         if (!our_head_points_at)
1230                                 die(_("Remote branch %s not found in upstream %s"),
1231                                     option_branch, remote_name);
1232                 }
1233                 else
1234                         our_head_points_at = remote_head_points_at;
1235         }
1236         else {
1237                 const char *branch;
1238                 char *ref;
1239
1240                 if (option_branch)
1241                         die(_("Remote branch %s not found in upstream %s"),
1242                                         option_branch, remote_name);
1243
1244                 warning(_("You appear to have cloned an empty repository."));
1245                 mapped_refs = NULL;
1246                 our_head_points_at = NULL;
1247                 remote_head_points_at = NULL;
1248                 remote_head = NULL;
1249                 option_no_checkout = 1;
1250
1251                 if (transport_ls_refs_options.unborn_head_target &&
1252                     skip_prefix(transport_ls_refs_options.unborn_head_target,
1253                                 "refs/heads/", &branch)) {
1254                         ref = transport_ls_refs_options.unborn_head_target;
1255                         transport_ls_refs_options.unborn_head_target = NULL;
1256                         create_symref("HEAD", ref, reflog_msg.buf);
1257                 } else {
1258                         branch = git_default_branch_name(0);
1259                         ref = xstrfmt("refs/heads/%s", branch);
1260                 }
1261
1262                 if (!option_bare)
1263                         install_branch_config(0, branch, remote_name, ref);
1264
1265                 free(ref);
1266         }
1267
1268         write_refspec_config(src_ref_prefix, our_head_points_at,
1269                         remote_head_points_at, &branch_top);
1270
1271         if (filter_options.choice)
1272                 partial_clone_register(remote_name, &filter_options);
1273
1274         if (is_local)
1275                 clone_local(path, git_dir);
1276         else if (refs && complete_refs_before_fetch) {
1277                 if (transport_fetch_refs(transport, mapped_refs))
1278                         die(_("remote transport reported error"));
1279         }
1280
1281         update_remote_refs(refs, mapped_refs, remote_head_points_at,
1282                            branch_top.buf, reflog_msg.buf, transport,
1283                            !is_local);
1284
1285         update_head(our_head_points_at, remote_head, reflog_msg.buf);
1286
1287         /*
1288          * We want to show progress for recursive submodule clones iff
1289          * we did so for the main clone. But only the transport knows
1290          * the final decision for this flag, so we need to rescue the value
1291          * before we free the transport.
1292          */
1293         submodule_progress = transport->progress;
1294
1295         transport_unlock_pack(transport, 0);
1296         transport_disconnect(transport);
1297
1298         if (option_dissociate) {
1299                 close_object_store(the_repository->objects);
1300                 dissociate_from_references();
1301         }
1302
1303         junk_mode = JUNK_LEAVE_REPO;
1304         err = checkout(submodule_progress);
1305
1306         free(remote_name);
1307         strbuf_release(&reflog_msg);
1308         strbuf_release(&branch_top);
1309         strbuf_release(&key);
1310         free_refs(mapped_refs);
1311         free_refs(remote_head_points_at);
1312         free(dir);
1313         free(path);
1314         UNLEAK(repo);
1315         junk_mode = JUNK_LEAVE_ALL;
1316
1317         strvec_clear(&transport_ls_refs_options.ref_prefixes);
1318         free(transport_ls_refs_options.unborn_head_target);
1319         return err;
1320 }