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         unsigned int flags;
 314         struct strbuf realpath = STRBUF_INIT;
 315
 316         mkdir_if_missing(dest->buf, 0777);
 317
 318         flags = DIR_ITERATOR_PEDANTIC | DIR_ITERATOR_FOLLOW_SYMLINKS;
 319         iter = dir_iterator_begin(src->buf, flags);
 320
 321         if (!iter)
 322                 die_errno(_("failed to start iterator over '%s'"), src->buf);
 323
 324         strbuf_addch(src, '/');
 325         src_len = src->len;
 326         strbuf_addch(dest, '/');
 327         dest_len = dest->len;
 328
 329         while ((iter_status = dir_iterator_advance(iter)) == ITER_OK) {
 330                 strbuf_setlen(src, src_len);
 331                 strbuf_addstr(src, iter->relative_path);
 332                 strbuf_setlen(dest, dest_len);
 333                 strbuf_addstr(dest, iter->relative_path);
 334
 335                 if (S_ISDIR(iter->st.st_mode)) {
 336                         mkdir_if_missing(dest->buf, 0777);
 337                         continue;
 338                 }
 339
 340                 /* Files that cannot be copied bit-for-bit... */
 341                 if (!fspathcmp(iter->relative_path, "info/alternates")) {
 342                         copy_alternates(src, src_repo);
 343                         continue;
 344                 }
 345
 346                 if (unlink(dest->buf) && errno != ENOENT)
 347                         die_errno(_("failed to unlink '%s'"), dest->buf);
 348                 if (!option_no_hardlinks) {
 349                         strbuf_realpath(&realpath, src->buf, 1);
 350                         if (!link(realpath.buf, dest->buf))
 351                                 continue;
 352                         if (option_local > 0)
 353                                 die_errno(_("failed to create link '%s'"), dest->buf);
 354                         option_no_hardlinks = 1;
 355                 }
 356                 if (copy_file_with_time(dest->buf, src->buf, 0666))
 357                         die_errno(_("failed to copy file to '%s'"), dest->buf);
 358         }
 359
 360         if (iter_status != ITER_DONE) {
 361                 strbuf_setlen(src, src_len);
 362                 die(_("failed to iterate over '%s'"), src->buf);
 363         }
 364
 365         strbuf_release(&realpath);
 366 }
 367
 368 static void clone_local(const char *src_repo, const char *dest_repo)
 369 {
 370         if (option_shared) {
 371                 struct strbuf alt = STRBUF_INIT;
 372                 get_common_dir(&alt, src_repo);
 373                 strbuf_addstr(&alt, "/objects");
 374                 add_to_alternates_file(alt.buf);
 375                 strbuf_release(&alt);
 376         } else {
 377                 struct strbuf src = STRBUF_INIT;
 378                 struct strbuf dest = STRBUF_INIT;
 379                 get_common_dir(&src, src_repo);
 380                 get_common_dir(&dest, dest_repo);
 381                 strbuf_addstr(&src, "/objects");
 382                 strbuf_addstr(&dest, "/objects");
 383                 copy_or_link_directory(&src, &dest, src_repo);
 384                 strbuf_release(&src);
 385                 strbuf_release(&dest);
 386         }
 387
 388         if (0 <= option_verbosity)
 389                 fprintf(stderr, _("done.\n"));
 390 }
 391
 392 static const char *junk_work_tree;
 393 static int junk_work_tree_flags;
 394 static const char *junk_git_dir;
 395 static int junk_git_dir_flags;
 396 static enum {
 397         JUNK_LEAVE_NONE,
 398         JUNK_LEAVE_REPO,
 399         JUNK_LEAVE_ALL
 400 } junk_mode = JUNK_LEAVE_NONE;
 401
 402 static const char junk_leave_repo_msg[] =
 403 N_("Clone succeeded, but checkout failed.\n"
 404    "You can inspect what was checked out with 'git status'\n"
 405    "and retry with 'git restore --source=HEAD :/'\n");
 406
 407 static void remove_junk(void)
 408 {
 409         struct strbuf sb = STRBUF_INIT;
 410
 411         switch (junk_mode) {
 412         case JUNK_LEAVE_REPO:
 413                 warning("%s", _(junk_leave_repo_msg));
 414                 /* fall-through */
 415         case JUNK_LEAVE_ALL:
 416                 return;
 417         default:
 418                 /* proceed to removal */
 419                 break;
 420         }
 421
 422         if (junk_git_dir) {
 423                 strbuf_addstr(&sb, junk_git_dir);
 424                 remove_dir_recursively(&sb, junk_git_dir_flags);
 425                 strbuf_reset(&sb);
 426         }
 427         if (junk_work_tree) {
 428                 strbuf_addstr(&sb, junk_work_tree);
 429                 remove_dir_recursively(&sb, junk_work_tree_flags);
 430         }
 431         strbuf_release(&sb);
 432 }
 433
 434 static void remove_junk_on_signal(int signo)
 435 {
 436         remove_junk();
 437         sigchain_pop(signo);
 438         raise(signo);
 439 }
 440
 441 static struct ref *find_remote_branch(const struct ref *refs, const char *branch)
 442 {
 443         struct ref *ref;
 444         struct strbuf head = STRBUF_INIT;
 445         strbuf_addstr(&head, "refs/heads/");
 446         strbuf_addstr(&head, branch);
 447         ref = find_ref_by_name(refs, head.buf);
 448         strbuf_release(&head);
 449
 450         if (ref)
 451                 return ref;
 452
 453         strbuf_addstr(&head, "refs/tags/");
 454         strbuf_addstr(&head, branch);
 455         ref = find_ref_by_name(refs, head.buf);
 456         strbuf_release(&head);
 457
 458         return ref;
 459 }
 460
 461 static struct ref *wanted_peer_refs(const struct ref *refs,
 462                 struct refspec *refspec)
 463 {
 464         struct ref *head = copy_ref(find_ref_by_name(refs, "HEAD"));
 465         struct ref *local_refs = head;
 466         struct ref **tail = head ? &head->next : &local_refs;
 467
 468         if (option_single_branch) {
 469                 struct ref *remote_head = NULL;
 470
 471                 if (!option_branch)
 472                         remote_head = guess_remote_head(head, refs, 0);
 473                 else {
 474                         local_refs = NULL;
 475                         tail = &local_refs;
 476                         remote_head = copy_ref(find_remote_branch(refs, option_branch));
 477                 }
 478
 479                 if (!remote_head && option_branch)
 480                         warning(_("Could not find remote branch %s to clone."),
 481                                 option_branch);
 482                 else {
 483                         int i;
 484                         for (i = 0; i < refspec->nr; i++)
 485                                 get_fetch_map(remote_head, &refspec->items[i],
 486                                               &tail, 0);
 487
 488                         /* if --branch=tag, pull the requested tag explicitly */
 489                         get_fetch_map(remote_head, tag_refspec, &tail, 0);
 490                 }
 491         } else {
 492                 int i;
 493                 for (i = 0; i < refspec->nr; i++)
 494                         get_fetch_map(refs, &refspec->items[i], &tail, 0);
 495         }
 496
 497         if (!option_mirror && !option_single_branch && !option_no_tags)
 498                 get_fetch_map(refs, tag_refspec, &tail, 0);
 499
 500         return local_refs;
 501 }
 502
 503 static void write_remote_refs(const struct ref *local_refs)
 504 {
 505         const struct ref *r;
 506
 507         struct ref_transaction *t;
 508         struct strbuf err = STRBUF_INIT;
 509
 510         t = ref_transaction_begin(&err);
 511         if (!t)
 512                 die("%s", err.buf);
 513
 514         for (r = local_refs; r; r = r->next) {
 515                 if (!r->peer_ref)
 516                         continue;
 517                 if (ref_transaction_create(t, r->peer_ref->name, &r->old_oid,
 518                                            0, NULL, &err))
 519                         die("%s", err.buf);
 520         }
 521
 522         if (initial_ref_transaction_commit(t, &err))
 523                 die("%s", err.buf);
 524
 525         strbuf_release(&err);
 526         ref_transaction_free(t);
 527 }
 528
 529 static void write_followtags(const struct ref *refs, const char *msg)
 530 {
 531         const struct ref *ref;
 532         for (ref = refs; ref; ref = ref->next) {
 533                 if (!starts_with(ref->name, "refs/tags/"))
 534                         continue;
 535                 if (ends_with(ref->name, "^{}"))
 536                         continue;
 537                 if (!has_object_file_with_flags(&ref->old_oid,
 538                                                 OBJECT_INFO_QUICK |
 539                                                 OBJECT_INFO_SKIP_FETCH_OBJECT))
 540                         continue;
 541                 update_ref(msg, ref->name, &ref->old_oid, NULL, 0,
 542                            UPDATE_REFS_DIE_ON_ERR);
 543         }
 544 }
 545
 546 static const struct object_id *iterate_ref_map(void *cb_data)
 547 {
 548         struct ref **rm = cb_data;
 549         struct ref *ref = *rm;
 550
 551         /*
 552          * Skip anything missing a peer_ref, which we are not
 553          * actually going to write a ref for.
 554          */
 555         while (ref && !ref->peer_ref)
 556                 ref = ref->next;
 557         if (!ref)
 558                 return NULL;
 559
 560         *rm = ref->next;
 561         return &ref->old_oid;
 562 }
 563
 564 static void update_remote_refs(const struct ref *refs,
 565                                const struct ref *mapped_refs,
 566                                const struct ref *remote_head_points_at,
 567                                const char *branch_top,
 568                                const char *msg,
 569                                struct transport *transport,
 570                                int check_connectivity)
 571 {
 572         const struct ref *rm = mapped_refs;
 573
 574         if (check_connectivity) {
 575                 struct check_connected_options opt = CHECK_CONNECTED_INIT;
 576
 577                 opt.transport = transport;
 578                 opt.progress = transport->progress;
 579
 580                 if (check_connected(iterate_ref_map, &rm, &opt))
 581                         die(_("remote did not send all necessary objects"));
 582         }
 583
 584         if (refs) {
 585                 write_remote_refs(mapped_refs);
 586                 if (option_single_branch && !option_no_tags)
 587                         write_followtags(refs, msg);
 588         }
 589
 590         if (remote_head_points_at && !option_bare) {
 591                 struct strbuf head_ref = STRBUF_INIT;
 592                 strbuf_addstr(&head_ref, branch_top);
 593                 strbuf_addstr(&head_ref, "HEAD");
 594                 if (create_symref(head_ref.buf,
 595                                   remote_head_points_at->peer_ref->name,
 596                                   msg) < 0)
 597                         die(_("unable to update %s"), head_ref.buf);
 598                 strbuf_release(&head_ref);
 599         }
 600 }
 601
 602 static void update_head(const struct ref *our, const struct ref *remote,
 603                         const char *msg)
 604 {
 605         const char *head;
 606         if (our && skip_prefix(our->name, "refs/heads/", &head)) {
 607                 /* Local default branch link */
 608                 if (create_symref("HEAD", our->name, NULL) < 0)
 609                         die(_("unable to update HEAD"));
 610                 if (!option_bare) {
 611                         update_ref(msg, "HEAD", &our->old_oid, NULL, 0,
 612                                    UPDATE_REFS_DIE_ON_ERR);
 613                         install_branch_config(0, head, remote_name, our->name);
 614                 }
 615         } else if (our) {
 616                 struct commit *c = lookup_commit_reference(the_repository,
 617                                                            &our->old_oid);
 618                 /* --branch specifies a non-branch (i.e. tags), detach HEAD */
 619                 update_ref(msg, "HEAD", &c->object.oid, NULL, REF_NO_DEREF,
 620                            UPDATE_REFS_DIE_ON_ERR);
 621         } else if (remote) {
 622                 /*
 623                  * We know remote HEAD points to a non-branch, or
 624                  * HEAD points to a branch but we don't know which one.
 625                  * Detach HEAD in all these cases.
 626                  */
 627                 update_ref(msg, "HEAD", &remote->old_oid, NULL, REF_NO_DEREF,
 628                            UPDATE_REFS_DIE_ON_ERR);
 629         }
 630 }
 631
 632 static int git_sparse_checkout_init(const char *repo)
 633 {
 634         struct strvec argv = STRVEC_INIT;
 635         int result = 0;
 636         strvec_pushl(&argv, "-C", repo, "sparse-checkout", "set", NULL);
 637
 638         /*
 639          * We must apply the setting in the current process
 640          * for the later checkout to use the sparse-checkout file.
 641          */
 642         core_apply_sparse_checkout = 1;
 643
 644         if (run_command_v_opt(argv.v, RUN_GIT_CMD)) {
 645                 error(_("failed to initialize sparse-checkout"));
 646                 result = 1;
 647         }
 648
 649         strvec_clear(&argv);
 650         return result;
 651 }
 652
 653 static int checkout(int submodule_progress)
 654 {
 655         struct object_id oid;
 656         char *head;
 657         struct lock_file lock_file = LOCK_INIT;
 658         struct unpack_trees_options opts;
 659         struct tree *tree;
 660         struct tree_desc t;
 661         int err = 0;
 662
 663         if (option_no_checkout)
 664                 return 0;
 665
 666         head = resolve_refdup("HEAD", RESOLVE_REF_READING, &oid, NULL);
 667         if (!head) {
 668                 warning(_("remote HEAD refers to nonexistent ref, "
 669                           "unable to checkout.\n"));
 670                 return 0;
 671         }
 672         if (!strcmp(head, "HEAD")) {
 673                 if (advice_enabled(ADVICE_DETACHED_HEAD))
 674                         detach_advice(oid_to_hex(&oid));
 675                 FREE_AND_NULL(head);
 676         } else {
 677                 if (!starts_with(head, "refs/heads/"))
 678                         die(_("HEAD not found below refs/heads!"));
 679         }
 680
 681         /* We need to be in the new work tree for the checkout */
 682         setup_work_tree();
 683
 684         hold_locked_index(&lock_file, LOCK_DIE_ON_ERROR);
 685
 686         memset(&opts, 0, sizeof opts);
 687         opts.update = 1;
 688         opts.merge = 1;
 689         opts.clone = 1;
 690         opts.preserve_ignored = 0;
 691         opts.fn = oneway_merge;
 692         opts.verbose_update = (option_verbosity >= 0);
 693         opts.src_index = &the_index;
 694         opts.dst_index = &the_index;
 695         init_checkout_metadata(&opts.meta, head, &oid, NULL);
 696
 697         tree = parse_tree_indirect(&oid);
 698         parse_tree(tree);
 699         init_tree_desc(&t, tree->buffer, tree->size);
 700         if (unpack_trees(1, &t, &opts) < 0)
 701                 die(_("unable to checkout working tree"));
 702
 703         free(head);
 704
 705         if (write_locked_index(&the_index, &lock_file, COMMIT_LOCK))
 706                 die(_("unable to write new index file"));
 707
 708         err |= run_hook_le(NULL, "post-checkout", oid_to_hex(null_oid()),
 709                            oid_to_hex(&oid), "1", NULL);
 710
 711         if (!err && (option_recurse_submodules.nr > 0)) {
 712                 struct strvec args = STRVEC_INIT;
 713                 strvec_pushl(&args, "submodule", "update", "--require-init", "--recursive", NULL);
 714
 715                 if (option_shallow_submodules == 1)
 716                         strvec_push(&args, "--depth=1");
 717
 718                 if (max_jobs != -1)
 719                         strvec_pushf(&args, "--jobs=%d", max_jobs);
 720
 721                 if (submodule_progress)
 722                         strvec_push(&args, "--progress");
 723
 724                 if (option_verbosity < 0)
 725                         strvec_push(&args, "--quiet");
 726
 727                 if (option_remote_submodules) {
 728                         strvec_push(&args, "--remote");
 729                         strvec_push(&args, "--no-fetch");
 730                 }
 731
 732                 if (option_single_branch >= 0)
 733                         strvec_push(&args, option_single_branch ?
 734                                                "--single-branch" :
 735                                                "--no-single-branch");
 736
 737                 err = run_command_v_opt(args.v, RUN_GIT_CMD);
 738                 strvec_clear(&args);
 739         }
 740
 741         return err;
 742 }
 743
 744 static int git_clone_config(const char *k, const char *v, void *cb)
 745 {
 746         if (!strcmp(k, "clone.defaultremotename")) {
 747                 free(remote_name);
 748                 remote_name = xstrdup(v);
 749         }
 750         if (!strcmp(k, "clone.rejectshallow"))
 751                 config_reject_shallow = git_config_bool(k, v);
 752
 753         return git_default_config(k, v, cb);
 754 }
 755
 756 static int write_one_config(const char *key, const char *value, void *data)
 757 {
 758         /*
 759          * give git_clone_config a chance to write config values back to the
 760          * environment, since git_config_set_multivar_gently only deals with
 761          * config-file writes
 762          */
 763         int apply_failed = git_clone_config(key, value, data);
 764         if (apply_failed)
 765                 return apply_failed;
 766
 767         return git_config_set_multivar_gently(key,
 768                                               value ? value : "true",
 769                                               CONFIG_REGEX_NONE, 0);
 770 }
 771
 772 static void write_config(struct string_list *config)
 773 {
 774         int i;
 775
 776         for (i = 0; i < config->nr; i++) {
 777                 if (git_config_parse_parameter(config->items[i].string,
 778                                                write_one_config, NULL) < 0)
 779                         die(_("unable to write parameters to config file"));
 780         }
 781 }
 782
 783 static void write_refspec_config(const char *src_ref_prefix,
 784                 const struct ref *our_head_points_at,
 785                 const struct ref *remote_head_points_at,
 786                 struct strbuf *branch_top)
 787 {
 788         struct strbuf key = STRBUF_INIT;
 789         struct strbuf value = STRBUF_INIT;
 790
 791         if (option_mirror || !option_bare) {
 792                 if (option_single_branch && !option_mirror) {
 793                         if (option_branch) {
 794                                 if (starts_with(our_head_points_at->name, "refs/tags/"))
 795                                         strbuf_addf(&value, "+%s:%s", our_head_points_at->name,
 796                                                 our_head_points_at->name);
 797                                 else
 798                                         strbuf_addf(&value, "+%s:%s%s", our_head_points_at->name,
 799                                                 branch_top->buf, option_branch);
 800                         } else if (remote_head_points_at) {
 801                                 const char *head = remote_head_points_at->name;
 802                                 if (!skip_prefix(head, "refs/heads/", &head))
 803                                         BUG("remote HEAD points at non-head?");
 804
 805                                 strbuf_addf(&value, "+%s:%s%s", remote_head_points_at->name,
 806                                                 branch_top->buf, head);
 807                         }
 808                         /*
 809                          * otherwise, the next "git fetch" will
 810                          * simply fetch from HEAD without updating
 811                          * any remote-tracking branch, which is what
 812                          * we want.
 813                          */
 814                 } else {
 815                         strbuf_addf(&value, "+%s*:%s*", src_ref_prefix, branch_top->buf);
 816                 }
 817                 /* Configure the remote */
 818                 if (value.len) {
 819                         strbuf_addf(&key, "remote.%s.fetch", remote_name);
 820                         git_config_set_multivar(key.buf, value.buf, "^$", 0);
 821                         strbuf_reset(&key);
 822
 823                         if (option_mirror) {
 824                                 strbuf_addf(&key, "remote.%s.mirror", remote_name);
 825                                 git_config_set(key.buf, "true");
 826                                 strbuf_reset(&key);
 827                         }
 828                 }
 829         }
 830
 831         strbuf_release(&key);
 832         strbuf_release(&value);
 833 }
 834
 835 static void dissociate_from_references(void)
 836 {
 837         static const char* argv[] = { "repack", "-a", "-d", NULL };
 838         char *alternates = git_pathdup("objects/info/alternates");
 839
 840         if (!access(alternates, F_OK)) {
 841                 if (run_command_v_opt(argv, RUN_GIT_CMD|RUN_COMMAND_NO_STDIN))
 842                         die(_("cannot repack to clean up"));
 843                 if (unlink(alternates) && errno != ENOENT)
 844                         die_errno(_("cannot unlink temporary alternates file"));
 845         }
 846         free(alternates);
 847 }
 848
 849 static int path_exists(const char *path)
 850 {
 851         struct stat sb;
 852         return !stat(path, &sb);
 853 }
 854
 855 int cmd_clone(int argc, const char **argv, const char *prefix)
 856 {
 857         int is_bundle = 0, is_local;
 858         int reject_shallow = 0;
 859         const char *repo_name, *repo, *work_tree, *git_dir;
 860         char *path = NULL, *dir, *display_repo = NULL;
 861         int dest_exists, real_dest_exists = 0;
 862         const struct ref *refs, *remote_head;
 863         struct ref *remote_head_points_at = NULL;
 864         const struct ref *our_head_points_at;
 865         struct ref *mapped_refs;
 866         const struct ref *ref;
 867         struct strbuf key = STRBUF_INIT;
 868         struct strbuf branch_top = STRBUF_INIT, reflog_msg = STRBUF_INIT;
 869         struct transport *transport = NULL;
 870         const char *src_ref_prefix = "refs/heads/";
 871         struct remote *remote;
 872         int err = 0, complete_refs_before_fetch = 1;
 873         int submodule_progress;
 874
 875         struct transport_ls_refs_options transport_ls_refs_options =
 876                 TRANSPORT_LS_REFS_OPTIONS_INIT;
 877
 878         packet_trace_identity("clone");
 879
 880         git_config(git_clone_config, NULL);
 881
 882         argc = parse_options(argc, argv, prefix, builtin_clone_options,
 883                              builtin_clone_usage, 0);
 884
 885         if (argc > 2)
 886                 usage_msg_opt(_("Too many arguments."),
 887                         builtin_clone_usage, builtin_clone_options);
 888
 889         if (argc == 0)
 890                 usage_msg_opt(_("You must specify a repository to clone."),
 891                         builtin_clone_usage, builtin_clone_options);
 892
 893         if (option_depth || option_since || option_not.nr)
 894                 deepen = 1;
 895         if (option_single_branch == -1)
 896                 option_single_branch = deepen ? 1 : 0;
 897
 898         if (option_mirror)
 899                 option_bare = 1;
 900
 901         if (option_bare) {
 902                 if (option_origin)
 903                         die(_("options '%s' and '%s %s' cannot be used together"),
 904                             "--bare", "--origin", option_origin);
 905                 if (real_git_dir)
 906                         die(_("options '%s' and '%s' cannot be used together"), "--bare", "--separate-git-dir");
 907                 option_no_checkout = 1;
 908         }
 909
 910         repo_name = argv[0];
 911
 912         path = get_repo_path(repo_name, &is_bundle);
 913         if (path) {
 914                 FREE_AND_NULL(path);
 915                 repo = absolute_pathdup(repo_name);
 916         } else if (strchr(repo_name, ':')) {
 917                 repo = repo_name;
 918                 display_repo = transport_anonymize_url(repo);
 919         } else
 920                 die(_("repository '%s' does not exist"), repo_name);
 921
 922         /* no need to be strict, transport_set_option() will validate it again */
 923         if (option_depth && atoi(option_depth) < 1)
 924                 die(_("depth %s is not a positive number"), option_depth);
 925
 926         if (argc == 2)
 927                 dir = xstrdup(argv[1]);
 928         else
 929                 dir = git_url_basename(repo_name, is_bundle, option_bare);
 930         strip_dir_trailing_slashes(dir);
 931
 932         dest_exists = path_exists(dir);
 933         if (dest_exists && !is_empty_dir(dir))
 934                 die(_("destination path '%s' already exists and is not "
 935                         "an empty directory."), dir);
 936
 937         if (real_git_dir) {
 938                 real_dest_exists = path_exists(real_git_dir);
 939                 if (real_dest_exists && !is_empty_dir(real_git_dir))
 940                         die(_("repository path '%s' already exists and is not "
 941                                 "an empty directory."), real_git_dir);
 942         }
 943
 944
 945         strbuf_addf(&reflog_msg, "clone: from %s",
 946                     display_repo ? display_repo : repo);
 947         free(display_repo);
 948
 949         if (option_bare)
 950                 work_tree = NULL;
 951         else {
 952                 work_tree = getenv("GIT_WORK_TREE");
 953                 if (work_tree && path_exists(work_tree))
 954                         die(_("working tree '%s' already exists."), work_tree);
 955         }
 956
 957         if (option_bare || work_tree)
 958                 git_dir = xstrdup(dir);
 959         else {
 960                 work_tree = dir;
 961                 git_dir = mkpathdup("%s/.git", dir);
 962         }
 963
 964         atexit(remove_junk);
 965         sigchain_push_common(remove_junk_on_signal);
 966
 967         if (!option_bare) {
 968                 if (safe_create_leading_directories_const(work_tree) < 0)
 969                         die_errno(_("could not create leading directories of '%s'"),
 970                                   work_tree);
 971                 if (dest_exists)
 972                         junk_work_tree_flags |= REMOVE_DIR_KEEP_TOPLEVEL;
 973                 else if (mkdir(work_tree, 0777))
 974                         die_errno(_("could not create work tree dir '%s'"),
 975                                   work_tree);
 976                 junk_work_tree = work_tree;
 977                 set_git_work_tree(work_tree);
 978         }
 979
 980         if (real_git_dir) {
 981                 if (real_dest_exists)
 982                         junk_git_dir_flags |= REMOVE_DIR_KEEP_TOPLEVEL;
 983                 junk_git_dir = real_git_dir;
 984         } else {
 985                 if (dest_exists)
 986                         junk_git_dir_flags |= REMOVE_DIR_KEEP_TOPLEVEL;
 987                 junk_git_dir = git_dir;
 988         }
 989         if (safe_create_leading_directories_const(git_dir) < 0)
 990                 die(_("could not create leading directories of '%s'"), git_dir);
 991
 992         if (0 <= option_verbosity) {
 993                 if (option_bare)
 994                         fprintf(stderr, _("Cloning into bare repository '%s'...\n"), dir);
 995                 else
 996                         fprintf(stderr, _("Cloning into '%s'...\n"), dir);
 997         }
 998
 999         if (option_recurse_submodules.nr > 0) {
1000                 struct string_list_item *item;
1001                 struct strbuf sb = STRBUF_INIT;
1002                 int val;
1003
1004                 /* remove duplicates */
1005                 string_list_sort(&option_recurse_submodules);
1006                 string_list_remove_duplicates(&option_recurse_submodules, 0);
1007
1008                 /*
1009                  * NEEDSWORK: In a multi-working-tree world, this needs to be
1010                  * set in the per-worktree config.
1011                  */
1012                 for_each_string_list_item(item, &option_recurse_submodules) {
1013                         strbuf_addf(&sb, "submodule.active=%s",
1014                                     item->string);
1015                         string_list_append(&option_config,
1016                                            strbuf_detach(&sb, NULL));
1017                 }
1018
1019                 if (!git_config_get_bool("submodule.stickyRecursiveClone", &val) &&
1020                     val)
1021                         string_list_append(&option_config, "submodule.recurse=true");
1022
1023                 if (option_required_reference.nr &&
1024                     option_optional_reference.nr)
1025                         die(_("clone --recursive is not compatible with "
1026                               "both --reference and --reference-if-able"));
1027                 else if (option_required_reference.nr) {
1028                         string_list_append(&option_config,
1029                                 "submodule.alternateLocation=superproject");
1030                         string_list_append(&option_config,
1031                                 "submodule.alternateErrorStrategy=die");
1032                 } else if (option_optional_reference.nr) {
1033                         string_list_append(&option_config,
1034                                 "submodule.alternateLocation=superproject");
1035                         string_list_append(&option_config,
1036                                 "submodule.alternateErrorStrategy=info");
1037                 }
1038         }
1039
1040         init_db(git_dir, real_git_dir, option_template, GIT_HASH_UNKNOWN, NULL,
1041                 INIT_DB_QUIET);
1042
1043         if (real_git_dir) {
1044                 free((char *)git_dir);
1045                 git_dir = real_git_dir;
1046         }
1047
1048         /*
1049          * additional config can be injected with -c, make sure it's included
1050          * after init_db, which clears the entire config environment.
1051          */
1052         write_config(&option_config);
1053
1054         /*
1055          * re-read config after init_db and write_config to pick up any config
1056          * injected by --template and --config, respectively.
1057          */
1058         git_config(git_clone_config, NULL);
1059
1060         /*
1061          * If option_reject_shallow is specified from CLI option,
1062          * ignore config_reject_shallow from git_clone_config.
1063          */
1064         if (config_reject_shallow != -1)
1065                 reject_shallow = config_reject_shallow;
1066         if (option_reject_shallow != -1)
1067                 reject_shallow = option_reject_shallow;
1068
1069         /*
1070          * apply the remote name provided by --origin only after this second
1071          * call to git_config, to ensure it overrides all config-based values.
1072          */
1073         if (option_origin != NULL)
1074                 remote_name = xstrdup(option_origin);
1075
1076         if (remote_name == NULL)
1077                 remote_name = xstrdup("origin");
1078
1079         if (!valid_remote_name(remote_name))
1080                 die(_("'%s' is not a valid remote name"), remote_name);
1081
1082         if (option_bare) {
1083                 if (option_mirror)
1084                         src_ref_prefix = "refs/";
1085                 strbuf_addstr(&branch_top, src_ref_prefix);
1086
1087                 git_config_set("core.bare", "true");
1088         } else {
1089                 strbuf_addf(&branch_top, "refs/remotes/%s/", remote_name);
1090         }
1091
1092         strbuf_addf(&key, "remote.%s.url", remote_name);
1093         git_config_set(key.buf, repo);
1094         strbuf_reset(&key);
1095
1096         if (option_no_tags) {
1097                 strbuf_addf(&key, "remote.%s.tagOpt", remote_name);
1098                 git_config_set(key.buf, "--no-tags");
1099                 strbuf_reset(&key);
1100         }
1101
1102         if (option_required_reference.nr || option_optional_reference.nr)
1103                 setup_reference();
1104
1105         if (option_sparse_checkout && git_sparse_checkout_init(dir))
1106                 return 1;
1107
1108         remote = remote_get(remote_name);
1109
1110         refspec_appendf(&remote->fetch, "+%s*:%s*", src_ref_prefix,
1111                         branch_top.buf);
1112
1113         transport = transport_get(remote, remote->url[0]);
1114         transport_set_verbosity(transport, option_verbosity, option_progress);
1115         transport->family = family;
1116
1117         path = get_repo_path(remote->url[0], &is_bundle);
1118         is_local = option_local != 0 && path && !is_bundle;
1119         if (is_local) {
1120                 if (option_depth)
1121                         warning(_("--depth is ignored in local clones; use file:// instead."));
1122                 if (option_since)
1123                         warning(_("--shallow-since is ignored in local clones; use file:// instead."));
1124                 if (option_not.nr)
1125                         warning(_("--shallow-exclude is ignored in local clones; use file:// instead."));
1126                 if (filter_options.choice)
1127                         warning(_("--filter is ignored in local clones; use file:// instead."));
1128                 if (!access(mkpath("%s/shallow", path), F_OK)) {
1129                         if (reject_shallow)
1130                                 die(_("source repository is shallow, reject to clone."));
1131                         if (option_local > 0)
1132                                 warning(_("source repository is shallow, ignoring --local"));
1133                         is_local = 0;
1134                 }
1135         }
1136         if (option_local > 0 && !is_local)
1137                 warning(_("--local is ignored"));
1138         transport->cloning = 1;
1139
1140         transport_set_option(transport, TRANS_OPT_KEEP, "yes");
1141
1142         if (reject_shallow)
1143                 transport_set_option(transport, TRANS_OPT_REJECT_SHALLOW, "1");
1144         if (option_depth)
1145                 transport_set_option(transport, TRANS_OPT_DEPTH,
1146                                      option_depth);
1147         if (option_since)
1148                 transport_set_option(transport, TRANS_OPT_DEEPEN_SINCE,
1149                                      option_since);
1150         if (option_not.nr)
1151                 transport_set_option(transport, TRANS_OPT_DEEPEN_NOT,
1152                                      (const char *)&option_not);
1153         if (option_single_branch)
1154                 transport_set_option(transport, TRANS_OPT_FOLLOWTAGS, "1");
1155
1156         if (option_upload_pack)
1157                 transport_set_option(transport, TRANS_OPT_UPLOADPACK,
1158                                      option_upload_pack);
1159
1160         if (server_options.nr)
1161                 transport->server_options = &server_options;
1162
1163         if (filter_options.choice) {
1164                 const char *spec =
1165                         expand_list_objects_filter_spec(&filter_options);
1166                 transport_set_option(transport, TRANS_OPT_LIST_OBJECTS_FILTER,
1167                                      spec);
1168                 transport_set_option(transport, TRANS_OPT_FROM_PROMISOR, "1");
1169         }
1170
1171         if (transport->smart_options && !deepen && !filter_options.choice)
1172                 transport->smart_options->check_self_contained_and_connected = 1;
1173
1174
1175         strvec_push(&transport_ls_refs_options.ref_prefixes, "HEAD");
1176         refspec_ref_prefixes(&remote->fetch,
1177                              &transport_ls_refs_options.ref_prefixes);
1178         if (option_branch)
1179                 expand_ref_prefix(&transport_ls_refs_options.ref_prefixes,
1180                                   option_branch);
1181         if (!option_no_tags)
1182                 strvec_push(&transport_ls_refs_options.ref_prefixes,
1183                             "refs/tags/");
1184
1185         refs = transport_get_remote_refs(transport, &transport_ls_refs_options);
1186
1187         if (refs) {
1188                 int hash_algo = hash_algo_by_ptr(transport_get_hash_algo(transport));
1189
1190                 /*
1191                  * Now that we know what algorithm the remote side is using,
1192                  * let's set ours to the same thing.
1193                  */
1194                 initialize_repository_version(hash_algo, 1);
1195                 repo_set_hash_algo(the_repository, hash_algo);
1196
1197                 mapped_refs = wanted_peer_refs(refs, &remote->fetch);
1198                 /*
1199                  * transport_get_remote_refs() may return refs with null sha-1
1200                  * in mapped_refs (see struct transport->get_refs_list
1201                  * comment). In that case we need fetch it early because
1202                  * remote_head code below relies on it.
1203                  *
1204                  * for normal clones, transport_get_remote_refs() should
1205                  * return reliable ref set, we can delay cloning until after
1206                  * remote HEAD check.
1207                  */
1208                 for (ref = refs; ref; ref = ref->next)
1209                         if (is_null_oid(&ref->old_oid)) {
1210                                 complete_refs_before_fetch = 0;
1211                                 break;
1212                         }
1213
1214                 if (!is_local && !complete_refs_before_fetch) {
1215                         if (transport_fetch_refs(transport, mapped_refs))
1216                                 die(_("remote transport reported error"));
1217                 }
1218
1219                 remote_head = find_ref_by_name(refs, "HEAD");
1220                 remote_head_points_at =
1221                         guess_remote_head(remote_head, mapped_refs, 0);
1222
1223                 if (option_branch) {
1224                         our_head_points_at =
1225                                 find_remote_branch(mapped_refs, option_branch);
1226
1227                         if (!our_head_points_at)
1228                                 die(_("Remote branch %s not found in upstream %s"),
1229                                     option_branch, remote_name);
1230                 }
1231                 else
1232                         our_head_points_at = remote_head_points_at;
1233         }
1234         else {
1235                 const char *branch;
1236                 char *ref;
1237
1238                 if (option_branch)
1239                         die(_("Remote branch %s not found in upstream %s"),
1240                                         option_branch, remote_name);
1241
1242                 warning(_("You appear to have cloned an empty repository."));
1243                 mapped_refs = NULL;
1244                 our_head_points_at = NULL;
1245                 remote_head_points_at = NULL;
1246                 remote_head = NULL;
1247                 option_no_checkout = 1;
1248
1249                 if (transport_ls_refs_options.unborn_head_target &&
1250                     skip_prefix(transport_ls_refs_options.unborn_head_target,
1251                                 "refs/heads/", &branch)) {
1252                         ref = transport_ls_refs_options.unborn_head_target;
1253                         transport_ls_refs_options.unborn_head_target = NULL;
1254                         create_symref("HEAD", ref, reflog_msg.buf);
1255                 } else {
1256                         branch = git_default_branch_name(0);
1257                         ref = xstrfmt("refs/heads/%s", branch);
1258                 }
1259
1260                 if (!option_bare)
1261                         install_branch_config(0, branch, remote_name, ref);
1262
1263                 free(ref);
1264         }
1265
1266         write_refspec_config(src_ref_prefix, our_head_points_at,
1267                         remote_head_points_at, &branch_top);
1268
1269         if (filter_options.choice)
1270                 partial_clone_register(remote_name, &filter_options);
1271
1272         if (is_local)
1273                 clone_local(path, git_dir);
1274         else if (refs && complete_refs_before_fetch) {
1275                 if (transport_fetch_refs(transport, mapped_refs))
1276                         die(_("remote transport reported error"));
1277         }
1278
1279         update_remote_refs(refs, mapped_refs, remote_head_points_at,
1280                            branch_top.buf, reflog_msg.buf, transport,
1281                            !is_local);
1282
1283         update_head(our_head_points_at, remote_head, reflog_msg.buf);
1284
1285         /*
1286          * We want to show progress for recursive submodule clones iff
1287          * we did so for the main clone. But only the transport knows
1288          * the final decision for this flag, so we need to rescue the value
1289          * before we free the transport.
1290          */
1291         submodule_progress = transport->progress;
1292
1293         transport_unlock_pack(transport);
1294         transport_disconnect(transport);
1295
1296         if (option_dissociate) {
1297                 close_object_store(the_repository->objects);
1298                 dissociate_from_references();
1299         }
1300
1301         junk_mode = JUNK_LEAVE_REPO;
1302         err = checkout(submodule_progress);
1303
1304         free(remote_name);
1305         strbuf_release(&reflog_msg);
1306         strbuf_release(&branch_top);
1307         strbuf_release(&key);
1308         free_refs(mapped_refs);
1309         free_refs(remote_head_points_at);
1310         free(dir);
1311         free(path);
1312         UNLEAK(repo);
1313         junk_mode = JUNK_LEAVE_ALL;
1314
1315         strvec_clear(&transport_ls_refs_options.ref_prefixes);
1316         free(transport_ls_refs_options.unborn_head_target);
1317         return err;
1318 }