Merge branch 'tb/pack-bitmap'
[git] / 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 deepen;
54 static char *option_template, *option_depth, *option_since;
55 static char *option_origin = NULL;
56 static char *remote_name = NULL;
57 static char *option_branch = NULL;
58 static struct string_list option_not = STRING_LIST_INIT_NODUP;
59 static const char *real_git_dir;
60 static char *option_upload_pack = "git-upload-pack";
61 static int option_verbosity;
62 static int option_progress = -1;
63 static int option_sparse_checkout;
64 static enum transport_family family;
65 static struct string_list option_config = STRING_LIST_INIT_NODUP;
66 static struct string_list option_required_reference = STRING_LIST_INIT_NODUP;
67 static struct string_list option_optional_reference = STRING_LIST_INIT_NODUP;
68 static int option_dissociate;
69 static int max_jobs = -1;
70 static struct string_list option_recurse_submodules = STRING_LIST_INIT_NODUP;
71 static struct list_objects_filter_options filter_options;
72 static struct string_list server_options = STRING_LIST_INIT_NODUP;
73 static int option_remote_submodules;
74
75 static int recurse_submodules_cb(const struct option *opt,
76                                  const char *arg, int unset)
77 {
78         if (unset)
79                 string_list_clear((struct string_list *)opt->value, 0);
80         else if (arg)
81                 string_list_append((struct string_list *)opt->value, arg);
82         else
83                 string_list_append((struct string_list *)opt->value,
84                                    (const char *)opt->defval);
85
86         return 0;
87 }
88
89 static struct option builtin_clone_options[] = {
90         OPT__VERBOSITY(&option_verbosity),
91         OPT_BOOL(0, "progress", &option_progress,
92                  N_("force progress reporting")),
93         OPT_BOOL('n', "no-checkout", &option_no_checkout,
94                  N_("don't create a checkout")),
95         OPT_BOOL(0, "bare", &option_bare, N_("create a bare repository")),
96         OPT_HIDDEN_BOOL(0, "naked", &option_bare,
97                         N_("create a bare repository")),
98         OPT_BOOL(0, "mirror", &option_mirror,
99                  N_("create a mirror repository (implies bare)")),
100         OPT_BOOL('l', "local", &option_local,
101                 N_("to clone from a local repository")),
102         OPT_BOOL(0, "no-hardlinks", &option_no_hardlinks,
103                     N_("don't use local hardlinks, always copy")),
104         OPT_BOOL('s', "shared", &option_shared,
105                     N_("setup as shared repository")),
106         { OPTION_CALLBACK, 0, "recurse-submodules", &option_recurse_submodules,
107           N_("pathspec"), N_("initialize submodules in the clone"),
108           PARSE_OPT_OPTARG, recurse_submodules_cb, (intptr_t)"." },
109         OPT_ALIAS(0, "recursive", "recurse-submodules"),
110         OPT_INTEGER('j', "jobs", &max_jobs,
111                     N_("number of submodules cloned in parallel")),
112         OPT_STRING(0, "template", &option_template, N_("template-directory"),
113                    N_("directory from which templates will be used")),
114         OPT_STRING_LIST(0, "reference", &option_required_reference, N_("repo"),
115                         N_("reference repository")),
116         OPT_STRING_LIST(0, "reference-if-able", &option_optional_reference,
117                         N_("repo"), N_("reference repository")),
118         OPT_BOOL(0, "dissociate", &option_dissociate,
119                  N_("use --reference only while cloning")),
120         OPT_STRING('o', "origin", &option_origin, N_("name"),
121                    N_("use <name> instead of 'origin' to track upstream")),
122         OPT_STRING('b', "branch", &option_branch, N_("branch"),
123                    N_("checkout <branch> instead of the remote's HEAD")),
124         OPT_STRING('u', "upload-pack", &option_upload_pack, N_("path"),
125                    N_("path to git-upload-pack on the remote")),
126         OPT_STRING(0, "depth", &option_depth, N_("depth"),
127                     N_("create a shallow clone of that depth")),
128         OPT_STRING(0, "shallow-since", &option_since, N_("time"),
129                     N_("create a shallow clone since a specific time")),
130         OPT_STRING_LIST(0, "shallow-exclude", &option_not, N_("revision"),
131                         N_("deepen history of shallow clone, excluding rev")),
132         OPT_BOOL(0, "single-branch", &option_single_branch,
133                     N_("clone only one branch, HEAD or --branch")),
134         OPT_BOOL(0, "no-tags", &option_no_tags,
135                  N_("don't clone any tags, and make later fetches not to follow them")),
136         OPT_BOOL(0, "shallow-submodules", &option_shallow_submodules,
137                     N_("any cloned submodules will be shallow")),
138         OPT_STRING(0, "separate-git-dir", &real_git_dir, N_("gitdir"),
139                    N_("separate git dir from working tree")),
140         OPT_STRING_LIST('c', "config", &option_config, N_("key=value"),
141                         N_("set config inside the new repository")),
142         OPT_STRING_LIST(0, "server-option", &server_options,
143                         N_("server-specific"), N_("option to transmit")),
144         OPT_SET_INT('4', "ipv4", &family, N_("use IPv4 addresses only"),
145                         TRANSPORT_FAMILY_IPV4),
146         OPT_SET_INT('6', "ipv6", &family, N_("use IPv6 addresses only"),
147                         TRANSPORT_FAMILY_IPV6),
148         OPT_PARSE_LIST_OBJECTS_FILTER(&filter_options),
149         OPT_BOOL(0, "remote-submodules", &option_remote_submodules,
150                     N_("any cloned submodules will use their remote-tracking branch")),
151         OPT_BOOL(0, "sparse", &option_sparse_checkout,
152                     N_("initialize sparse-checkout file to include only files at root")),
153         OPT_END()
154 };
155
156 static const char *get_repo_path_1(struct strbuf *path, int *is_bundle)
157 {
158         static char *suffix[] = { "/.git", "", ".git/.git", ".git" };
159         static char *bundle_suffix[] = { ".bundle", "" };
160         size_t baselen = path->len;
161         struct stat st;
162         int i;
163
164         for (i = 0; i < ARRAY_SIZE(suffix); i++) {
165                 strbuf_setlen(path, baselen);
166                 strbuf_addstr(path, suffix[i]);
167                 if (stat(path->buf, &st))
168                         continue;
169                 if (S_ISDIR(st.st_mode) && is_git_directory(path->buf)) {
170                         *is_bundle = 0;
171                         return path->buf;
172                 } else if (S_ISREG(st.st_mode) && st.st_size > 8) {
173                         /* Is it a "gitfile"? */
174                         char signature[8];
175                         const char *dst;
176                         int len, fd = open(path->buf, O_RDONLY);
177                         if (fd < 0)
178                                 continue;
179                         len = read_in_full(fd, signature, 8);
180                         close(fd);
181                         if (len != 8 || strncmp(signature, "gitdir: ", 8))
182                                 continue;
183                         dst = read_gitfile(path->buf);
184                         if (dst) {
185                                 *is_bundle = 0;
186                                 return dst;
187                         }
188                 }
189         }
190
191         for (i = 0; i < ARRAY_SIZE(bundle_suffix); i++) {
192                 strbuf_setlen(path, baselen);
193                 strbuf_addstr(path, bundle_suffix[i]);
194                 if (!stat(path->buf, &st) && S_ISREG(st.st_mode)) {
195                         *is_bundle = 1;
196                         return path->buf;
197                 }
198         }
199
200         return NULL;
201 }
202
203 static char *get_repo_path(const char *repo, int *is_bundle)
204 {
205         struct strbuf path = STRBUF_INIT;
206         const char *raw;
207         char *canon;
208
209         strbuf_addstr(&path, repo);
210         raw = get_repo_path_1(&path, is_bundle);
211         canon = raw ? absolute_pathdup(raw) : NULL;
212         strbuf_release(&path);
213         return canon;
214 }
215
216 static char *guess_dir_name(const char *repo, int is_bundle, int is_bare)
217 {
218         const char *end = repo + strlen(repo), *start, *ptr;
219         size_t len;
220         char *dir;
221
222         /*
223          * Skip scheme.
224          */
225         start = strstr(repo, "://");
226         if (start == NULL)
227                 start = repo;
228         else
229                 start += 3;
230
231         /*
232          * Skip authentication data. The stripping does happen
233          * greedily, such that we strip up to the last '@' inside
234          * the host part.
235          */
236         for (ptr = start; ptr < end && !is_dir_sep(*ptr); ptr++) {
237                 if (*ptr == '@')
238                         start = ptr + 1;
239         }
240
241         /*
242          * Strip trailing spaces, slashes and /.git
243          */
244         while (start < end && (is_dir_sep(end[-1]) || isspace(end[-1])))
245                 end--;
246         if (end - start > 5 && is_dir_sep(end[-5]) &&
247             !strncmp(end - 4, ".git", 4)) {
248                 end -= 5;
249                 while (start < end && is_dir_sep(end[-1]))
250                         end--;
251         }
252
253         /*
254          * Strip trailing port number if we've got only a
255          * hostname (that is, there is no dir separator but a
256          * colon). This check is required such that we do not
257          * strip URI's like '/foo/bar:2222.git', which should
258          * result in a dir '2222' being guessed due to backwards
259          * compatibility.
260          */
261         if (memchr(start, '/', end - start) == NULL
262             && memchr(start, ':', end - start) != NULL) {
263                 ptr = end;
264                 while (start < ptr && isdigit(ptr[-1]) && ptr[-1] != ':')
265                         ptr--;
266                 if (start < ptr && ptr[-1] == ':')
267                         end = ptr - 1;
268         }
269
270         /*
271          * Find last component. To remain backwards compatible we
272          * also regard colons as path separators, such that
273          * cloning a repository 'foo:bar.git' would result in a
274          * directory 'bar' being guessed.
275          */
276         ptr = end;
277         while (start < ptr && !is_dir_sep(ptr[-1]) && ptr[-1] != ':')
278                 ptr--;
279         start = ptr;
280
281         /*
282          * Strip .{bundle,git}.
283          */
284         len = end - start;
285         strip_suffix_mem(start, &len, is_bundle ? ".bundle" : ".git");
286
287         if (!len || (len == 1 && *start == '/'))
288                 die(_("No directory name could be guessed.\n"
289                       "Please specify a directory on the command line"));
290
291         if (is_bare)
292                 dir = xstrfmt("%.*s.git", (int)len, start);
293         else
294                 dir = xstrndup(start, len);
295         /*
296          * Replace sequences of 'control' characters and whitespace
297          * with one ascii space, remove leading and trailing spaces.
298          */
299         if (*dir) {
300                 char *out = dir;
301                 int prev_space = 1 /* strip leading whitespace */;
302                 for (end = dir; *end; ++end) {
303                         char ch = *end;
304                         if ((unsigned char)ch < '\x20')
305                                 ch = '\x20';
306                         if (isspace(ch)) {
307                                 if (prev_space)
308                                         continue;
309                                 prev_space = 1;
310                         } else
311                                 prev_space = 0;
312                         *out++ = ch;
313                 }
314                 *out = '\0';
315                 if (out > dir && prev_space)
316                         out[-1] = '\0';
317         }
318         return dir;
319 }
320
321 static void strip_trailing_slashes(char *dir)
322 {
323         char *end = dir + strlen(dir);
324
325         while (dir < end - 1 && is_dir_sep(end[-1]))
326                 end--;
327         *end = '\0';
328 }
329
330 static int add_one_reference(struct string_list_item *item, void *cb_data)
331 {
332         struct strbuf err = STRBUF_INIT;
333         int *required = cb_data;
334         char *ref_git = compute_alternate_path(item->string, &err);
335
336         if (!ref_git) {
337                 if (*required)
338                         die("%s", err.buf);
339                 else
340                         fprintf(stderr,
341                                 _("info: Could not add alternate for '%s': %s\n"),
342                                 item->string, err.buf);
343         } else {
344                 struct strbuf sb = STRBUF_INIT;
345                 strbuf_addf(&sb, "%s/objects", ref_git);
346                 add_to_alternates_file(sb.buf);
347                 strbuf_release(&sb);
348         }
349
350         strbuf_release(&err);
351         free(ref_git);
352         return 0;
353 }
354
355 static void setup_reference(void)
356 {
357         int required = 1;
358         for_each_string_list(&option_required_reference,
359                              add_one_reference, &required);
360         required = 0;
361         for_each_string_list(&option_optional_reference,
362                              add_one_reference, &required);
363 }
364
365 static void copy_alternates(struct strbuf *src, const char *src_repo)
366 {
367         /*
368          * Read from the source objects/info/alternates file
369          * and copy the entries to corresponding file in the
370          * destination repository with add_to_alternates_file().
371          * Both src and dst have "$path/objects/info/alternates".
372          *
373          * Instead of copying bit-for-bit from the original,
374          * we need to append to existing one so that the already
375          * created entry via "clone -s" is not lost, and also
376          * to turn entries with paths relative to the original
377          * absolute, so that they can be used in the new repository.
378          */
379         FILE *in = xfopen(src->buf, "r");
380         struct strbuf line = STRBUF_INIT;
381
382         while (strbuf_getline(&line, in) != EOF) {
383                 char *abs_path;
384                 if (!line.len || line.buf[0] == '#')
385                         continue;
386                 if (is_absolute_path(line.buf)) {
387                         add_to_alternates_file(line.buf);
388                         continue;
389                 }
390                 abs_path = mkpathdup("%s/objects/%s", src_repo, line.buf);
391                 if (!normalize_path_copy(abs_path, abs_path))
392                         add_to_alternates_file(abs_path);
393                 else
394                         warning("skipping invalid relative alternate: %s/%s",
395                                 src_repo, line.buf);
396                 free(abs_path);
397         }
398         strbuf_release(&line);
399         fclose(in);
400 }
401
402 static void mkdir_if_missing(const char *pathname, mode_t mode)
403 {
404         struct stat st;
405
406         if (!mkdir(pathname, mode))
407                 return;
408
409         if (errno != EEXIST)
410                 die_errno(_("failed to create directory '%s'"), pathname);
411         else if (stat(pathname, &st))
412                 die_errno(_("failed to stat '%s'"), pathname);
413         else if (!S_ISDIR(st.st_mode))
414                 die(_("%s exists and is not a directory"), pathname);
415 }
416
417 static void copy_or_link_directory(struct strbuf *src, struct strbuf *dest,
418                                    const char *src_repo)
419 {
420         int src_len, dest_len;
421         struct dir_iterator *iter;
422         int iter_status;
423         unsigned int flags;
424         struct strbuf realpath = STRBUF_INIT;
425
426         mkdir_if_missing(dest->buf, 0777);
427
428         flags = DIR_ITERATOR_PEDANTIC | DIR_ITERATOR_FOLLOW_SYMLINKS;
429         iter = dir_iterator_begin(src->buf, flags);
430
431         if (!iter)
432                 die_errno(_("failed to start iterator over '%s'"), src->buf);
433
434         strbuf_addch(src, '/');
435         src_len = src->len;
436         strbuf_addch(dest, '/');
437         dest_len = dest->len;
438
439         while ((iter_status = dir_iterator_advance(iter)) == ITER_OK) {
440                 strbuf_setlen(src, src_len);
441                 strbuf_addstr(src, iter->relative_path);
442                 strbuf_setlen(dest, dest_len);
443                 strbuf_addstr(dest, iter->relative_path);
444
445                 if (S_ISDIR(iter->st.st_mode)) {
446                         mkdir_if_missing(dest->buf, 0777);
447                         continue;
448                 }
449
450                 /* Files that cannot be copied bit-for-bit... */
451                 if (!fspathcmp(iter->relative_path, "info/alternates")) {
452                         copy_alternates(src, src_repo);
453                         continue;
454                 }
455
456                 if (unlink(dest->buf) && errno != ENOENT)
457                         die_errno(_("failed to unlink '%s'"), dest->buf);
458                 if (!option_no_hardlinks) {
459                         strbuf_realpath(&realpath, src->buf, 1);
460                         if (!link(realpath.buf, dest->buf))
461                                 continue;
462                         if (option_local > 0)
463                                 die_errno(_("failed to create link '%s'"), dest->buf);
464                         option_no_hardlinks = 1;
465                 }
466                 if (copy_file_with_time(dest->buf, src->buf, 0666))
467                         die_errno(_("failed to copy file to '%s'"), dest->buf);
468         }
469
470         if (iter_status != ITER_DONE) {
471                 strbuf_setlen(src, src_len);
472                 die(_("failed to iterate over '%s'"), src->buf);
473         }
474
475         strbuf_release(&realpath);
476 }
477
478 static void clone_local(const char *src_repo, const char *dest_repo)
479 {
480         if (option_shared) {
481                 struct strbuf alt = STRBUF_INIT;
482                 get_common_dir(&alt, src_repo);
483                 strbuf_addstr(&alt, "/objects");
484                 add_to_alternates_file(alt.buf);
485                 strbuf_release(&alt);
486         } else {
487                 struct strbuf src = STRBUF_INIT;
488                 struct strbuf dest = STRBUF_INIT;
489                 get_common_dir(&src, src_repo);
490                 get_common_dir(&dest, dest_repo);
491                 strbuf_addstr(&src, "/objects");
492                 strbuf_addstr(&dest, "/objects");
493                 copy_or_link_directory(&src, &dest, src_repo);
494                 strbuf_release(&src);
495                 strbuf_release(&dest);
496         }
497
498         if (0 <= option_verbosity)
499                 fprintf(stderr, _("done.\n"));
500 }
501
502 static const char *junk_work_tree;
503 static int junk_work_tree_flags;
504 static const char *junk_git_dir;
505 static int junk_git_dir_flags;
506 static enum {
507         JUNK_LEAVE_NONE,
508         JUNK_LEAVE_REPO,
509         JUNK_LEAVE_ALL
510 } junk_mode = JUNK_LEAVE_NONE;
511
512 static const char junk_leave_repo_msg[] =
513 N_("Clone succeeded, but checkout failed.\n"
514    "You can inspect what was checked out with 'git status'\n"
515    "and retry with 'git restore --source=HEAD :/'\n");
516
517 static void remove_junk(void)
518 {
519         struct strbuf sb = STRBUF_INIT;
520
521         switch (junk_mode) {
522         case JUNK_LEAVE_REPO:
523                 warning("%s", _(junk_leave_repo_msg));
524                 /* fall-through */
525         case JUNK_LEAVE_ALL:
526                 return;
527         default:
528                 /* proceed to removal */
529                 break;
530         }
531
532         if (junk_git_dir) {
533                 strbuf_addstr(&sb, junk_git_dir);
534                 remove_dir_recursively(&sb, junk_git_dir_flags);
535                 strbuf_reset(&sb);
536         }
537         if (junk_work_tree) {
538                 strbuf_addstr(&sb, junk_work_tree);
539                 remove_dir_recursively(&sb, junk_work_tree_flags);
540         }
541         strbuf_release(&sb);
542 }
543
544 static void remove_junk_on_signal(int signo)
545 {
546         remove_junk();
547         sigchain_pop(signo);
548         raise(signo);
549 }
550
551 static struct ref *find_remote_branch(const struct ref *refs, const char *branch)
552 {
553         struct ref *ref;
554         struct strbuf head = STRBUF_INIT;
555         strbuf_addstr(&head, "refs/heads/");
556         strbuf_addstr(&head, branch);
557         ref = find_ref_by_name(refs, head.buf);
558         strbuf_release(&head);
559
560         if (ref)
561                 return ref;
562
563         strbuf_addstr(&head, "refs/tags/");
564         strbuf_addstr(&head, branch);
565         ref = find_ref_by_name(refs, head.buf);
566         strbuf_release(&head);
567
568         return ref;
569 }
570
571 static struct ref *wanted_peer_refs(const struct ref *refs,
572                 struct refspec *refspec)
573 {
574         struct ref *head = copy_ref(find_ref_by_name(refs, "HEAD"));
575         struct ref *local_refs = head;
576         struct ref **tail = head ? &head->next : &local_refs;
577
578         if (option_single_branch) {
579                 struct ref *remote_head = NULL;
580
581                 if (!option_branch)
582                         remote_head = guess_remote_head(head, refs, 0);
583                 else {
584                         local_refs = NULL;
585                         tail = &local_refs;
586                         remote_head = copy_ref(find_remote_branch(refs, option_branch));
587                 }
588
589                 if (!remote_head && option_branch)
590                         warning(_("Could not find remote branch %s to clone."),
591                                 option_branch);
592                 else {
593                         int i;
594                         for (i = 0; i < refspec->nr; i++)
595                                 get_fetch_map(remote_head, &refspec->items[i],
596                                               &tail, 0);
597
598                         /* if --branch=tag, pull the requested tag explicitly */
599                         get_fetch_map(remote_head, tag_refspec, &tail, 0);
600                 }
601         } else {
602                 int i;
603                 for (i = 0; i < refspec->nr; i++)
604                         get_fetch_map(refs, &refspec->items[i], &tail, 0);
605         }
606
607         if (!option_mirror && !option_single_branch && !option_no_tags)
608                 get_fetch_map(refs, tag_refspec, &tail, 0);
609
610         return local_refs;
611 }
612
613 static void write_remote_refs(const struct ref *local_refs)
614 {
615         const struct ref *r;
616
617         struct ref_transaction *t;
618         struct strbuf err = STRBUF_INIT;
619
620         t = ref_transaction_begin(&err);
621         if (!t)
622                 die("%s", err.buf);
623
624         for (r = local_refs; r; r = r->next) {
625                 if (!r->peer_ref)
626                         continue;
627                 if (ref_transaction_create(t, r->peer_ref->name, &r->old_oid,
628                                            0, NULL, &err))
629                         die("%s", err.buf);
630         }
631
632         if (initial_ref_transaction_commit(t, &err))
633                 die("%s", err.buf);
634
635         strbuf_release(&err);
636         ref_transaction_free(t);
637 }
638
639 static void write_followtags(const struct ref *refs, const char *msg)
640 {
641         const struct ref *ref;
642         for (ref = refs; ref; ref = ref->next) {
643                 if (!starts_with(ref->name, "refs/tags/"))
644                         continue;
645                 if (ends_with(ref->name, "^{}"))
646                         continue;
647                 if (!has_object_file_with_flags(&ref->old_oid,
648                                                 OBJECT_INFO_QUICK |
649                                                 OBJECT_INFO_SKIP_FETCH_OBJECT))
650                         continue;
651                 update_ref(msg, ref->name, &ref->old_oid, NULL, 0,
652                            UPDATE_REFS_DIE_ON_ERR);
653         }
654 }
655
656 static int iterate_ref_map(void *cb_data, struct object_id *oid)
657 {
658         struct ref **rm = cb_data;
659         struct ref *ref = *rm;
660
661         /*
662          * Skip anything missing a peer_ref, which we are not
663          * actually going to write a ref for.
664          */
665         while (ref && !ref->peer_ref)
666                 ref = ref->next;
667         /* Returning -1 notes "end of list" to the caller. */
668         if (!ref)
669                 return -1;
670
671         oidcpy(oid, &ref->old_oid);
672         *rm = ref->next;
673         return 0;
674 }
675
676 static void update_remote_refs(const struct ref *refs,
677                                const struct ref *mapped_refs,
678                                const struct ref *remote_head_points_at,
679                                const char *branch_top,
680                                const char *msg,
681                                struct transport *transport,
682                                int check_connectivity)
683 {
684         const struct ref *rm = mapped_refs;
685
686         if (check_connectivity) {
687                 struct check_connected_options opt = CHECK_CONNECTED_INIT;
688
689                 opt.transport = transport;
690                 opt.progress = transport->progress;
691
692                 if (check_connected(iterate_ref_map, &rm, &opt))
693                         die(_("remote did not send all necessary objects"));
694         }
695
696         if (refs) {
697                 write_remote_refs(mapped_refs);
698                 if (option_single_branch && !option_no_tags)
699                         write_followtags(refs, msg);
700         }
701
702         if (remote_head_points_at && !option_bare) {
703                 struct strbuf head_ref = STRBUF_INIT;
704                 strbuf_addstr(&head_ref, branch_top);
705                 strbuf_addstr(&head_ref, "HEAD");
706                 if (create_symref(head_ref.buf,
707                                   remote_head_points_at->peer_ref->name,
708                                   msg) < 0)
709                         die(_("unable to update %s"), head_ref.buf);
710                 strbuf_release(&head_ref);
711         }
712 }
713
714 static void update_head(const struct ref *our, const struct ref *remote,
715                         const char *msg)
716 {
717         const char *head;
718         if (our && skip_prefix(our->name, "refs/heads/", &head)) {
719                 /* Local default branch link */
720                 if (create_symref("HEAD", our->name, NULL) < 0)
721                         die(_("unable to update HEAD"));
722                 if (!option_bare) {
723                         update_ref(msg, "HEAD", &our->old_oid, NULL, 0,
724                                    UPDATE_REFS_DIE_ON_ERR);
725                         install_branch_config(0, head, remote_name, our->name);
726                 }
727         } else if (our) {
728                 struct commit *c = lookup_commit_reference(the_repository,
729                                                            &our->old_oid);
730                 /* --branch specifies a non-branch (i.e. tags), detach HEAD */
731                 update_ref(msg, "HEAD", &c->object.oid, NULL, REF_NO_DEREF,
732                            UPDATE_REFS_DIE_ON_ERR);
733         } else if (remote) {
734                 /*
735                  * We know remote HEAD points to a non-branch, or
736                  * HEAD points to a branch but we don't know which one.
737                  * Detach HEAD in all these cases.
738                  */
739                 update_ref(msg, "HEAD", &remote->old_oid, NULL, REF_NO_DEREF,
740                            UPDATE_REFS_DIE_ON_ERR);
741         }
742 }
743
744 static int git_sparse_checkout_init(const char *repo)
745 {
746         struct strvec argv = STRVEC_INIT;
747         int result = 0;
748         strvec_pushl(&argv, "-C", repo, "sparse-checkout", "init", NULL);
749
750         /*
751          * We must apply the setting in the current process
752          * for the later checkout to use the sparse-checkout file.
753          */
754         core_apply_sparse_checkout = 1;
755
756         if (run_command_v_opt(argv.v, RUN_GIT_CMD)) {
757                 error(_("failed to initialize sparse-checkout"));
758                 result = 1;
759         }
760
761         strvec_clear(&argv);
762         return result;
763 }
764
765 static int checkout(int submodule_progress)
766 {
767         struct object_id oid;
768         char *head;
769         struct lock_file lock_file = LOCK_INIT;
770         struct unpack_trees_options opts;
771         struct tree *tree;
772         struct tree_desc t;
773         int err = 0;
774
775         if (option_no_checkout)
776                 return 0;
777
778         head = resolve_refdup("HEAD", RESOLVE_REF_READING, &oid, NULL);
779         if (!head) {
780                 warning(_("remote HEAD refers to nonexistent ref, "
781                           "unable to checkout.\n"));
782                 return 0;
783         }
784         if (!strcmp(head, "HEAD")) {
785                 if (advice_detached_head)
786                         detach_advice(oid_to_hex(&oid));
787                 FREE_AND_NULL(head);
788         } else {
789                 if (!starts_with(head, "refs/heads/"))
790                         die(_("HEAD not found below refs/heads!"));
791         }
792
793         /* We need to be in the new work tree for the checkout */
794         setup_work_tree();
795
796         hold_locked_index(&lock_file, LOCK_DIE_ON_ERROR);
797
798         memset(&opts, 0, sizeof opts);
799         opts.update = 1;
800         opts.merge = 1;
801         opts.clone = 1;
802         opts.fn = oneway_merge;
803         opts.verbose_update = (option_verbosity >= 0);
804         opts.src_index = &the_index;
805         opts.dst_index = &the_index;
806         init_checkout_metadata(&opts.meta, head, &oid, NULL);
807
808         tree = parse_tree_indirect(&oid);
809         parse_tree(tree);
810         init_tree_desc(&t, tree->buffer, tree->size);
811         if (unpack_trees(1, &t, &opts) < 0)
812                 die(_("unable to checkout working tree"));
813
814         free(head);
815
816         if (write_locked_index(&the_index, &lock_file, COMMIT_LOCK))
817                 die(_("unable to write new index file"));
818
819         err |= run_hook_le(NULL, "post-checkout", oid_to_hex(&null_oid),
820                            oid_to_hex(&oid), "1", NULL);
821
822         if (!err && (option_recurse_submodules.nr > 0)) {
823                 struct strvec args = STRVEC_INIT;
824                 strvec_pushl(&args, "submodule", "update", "--require-init", "--recursive", NULL);
825
826                 if (option_shallow_submodules == 1)
827                         strvec_push(&args, "--depth=1");
828
829                 if (max_jobs != -1)
830                         strvec_pushf(&args, "--jobs=%d", max_jobs);
831
832                 if (submodule_progress)
833                         strvec_push(&args, "--progress");
834
835                 if (option_verbosity < 0)
836                         strvec_push(&args, "--quiet");
837
838                 if (option_remote_submodules) {
839                         strvec_push(&args, "--remote");
840                         strvec_push(&args, "--no-fetch");
841                 }
842
843                 if (option_single_branch >= 0)
844                         strvec_push(&args, option_single_branch ?
845                                                "--single-branch" :
846                                                "--no-single-branch");
847
848                 err = run_command_v_opt(args.v, RUN_GIT_CMD);
849                 strvec_clear(&args);
850         }
851
852         return err;
853 }
854
855 static int git_clone_config(const char *k, const char *v, void *cb)
856 {
857         if (!strcmp(k, "clone.defaultremotename")) {
858                 free(remote_name);
859                 remote_name = xstrdup(v);
860         }
861         return git_default_config(k, v, cb);
862 }
863
864 static int write_one_config(const char *key, const char *value, void *data)
865 {
866         /*
867          * give git_clone_config a chance to write config values back to the
868          * environment, since git_config_set_multivar_gently only deals with
869          * config-file writes
870          */
871         int apply_failed = git_clone_config(key, value, data);
872         if (apply_failed)
873                 return apply_failed;
874
875         return git_config_set_multivar_gently(key,
876                                               value ? value : "true",
877                                               CONFIG_REGEX_NONE, 0);
878 }
879
880 static void write_config(struct string_list *config)
881 {
882         int i;
883
884         for (i = 0; i < config->nr; i++) {
885                 if (git_config_parse_parameter(config->items[i].string,
886                                                write_one_config, NULL) < 0)
887                         die(_("unable to write parameters to config file"));
888         }
889 }
890
891 static void write_refspec_config(const char *src_ref_prefix,
892                 const struct ref *our_head_points_at,
893                 const struct ref *remote_head_points_at,
894                 struct strbuf *branch_top)
895 {
896         struct strbuf key = STRBUF_INIT;
897         struct strbuf value = STRBUF_INIT;
898
899         if (option_mirror || !option_bare) {
900                 if (option_single_branch && !option_mirror) {
901                         if (option_branch) {
902                                 if (starts_with(our_head_points_at->name, "refs/tags/"))
903                                         strbuf_addf(&value, "+%s:%s", our_head_points_at->name,
904                                                 our_head_points_at->name);
905                                 else
906                                         strbuf_addf(&value, "+%s:%s%s", our_head_points_at->name,
907                                                 branch_top->buf, option_branch);
908                         } else if (remote_head_points_at) {
909                                 const char *head = remote_head_points_at->name;
910                                 if (!skip_prefix(head, "refs/heads/", &head))
911                                         BUG("remote HEAD points at non-head?");
912
913                                 strbuf_addf(&value, "+%s:%s%s", remote_head_points_at->name,
914                                                 branch_top->buf, head);
915                         }
916                         /*
917                          * otherwise, the next "git fetch" will
918                          * simply fetch from HEAD without updating
919                          * any remote-tracking branch, which is what
920                          * we want.
921                          */
922                 } else {
923                         strbuf_addf(&value, "+%s*:%s*", src_ref_prefix, branch_top->buf);
924                 }
925                 /* Configure the remote */
926                 if (value.len) {
927                         strbuf_addf(&key, "remote.%s.fetch", remote_name);
928                         git_config_set_multivar(key.buf, value.buf, "^$", 0);
929                         strbuf_reset(&key);
930
931                         if (option_mirror) {
932                                 strbuf_addf(&key, "remote.%s.mirror", remote_name);
933                                 git_config_set(key.buf, "true");
934                                 strbuf_reset(&key);
935                         }
936                 }
937         }
938
939         strbuf_release(&key);
940         strbuf_release(&value);
941 }
942
943 static void dissociate_from_references(void)
944 {
945         static const char* argv[] = { "repack", "-a", "-d", NULL };
946         char *alternates = git_pathdup("objects/info/alternates");
947
948         if (!access(alternates, F_OK)) {
949                 if (run_command_v_opt(argv, RUN_GIT_CMD|RUN_COMMAND_NO_STDIN))
950                         die(_("cannot repack to clean up"));
951                 if (unlink(alternates) && errno != ENOENT)
952                         die_errno(_("cannot unlink temporary alternates file"));
953         }
954         free(alternates);
955 }
956
957 static int path_exists(const char *path)
958 {
959         struct stat sb;
960         return !stat(path, &sb);
961 }
962
963 int cmd_clone(int argc, const char **argv, const char *prefix)
964 {
965         int is_bundle = 0, is_local;
966         const char *repo_name, *repo, *work_tree, *git_dir;
967         char *path, *dir, *display_repo = NULL;
968         int dest_exists, real_dest_exists = 0;
969         const struct ref *refs, *remote_head;
970         const struct ref *remote_head_points_at;
971         const struct ref *our_head_points_at;
972         struct ref *mapped_refs;
973         const struct ref *ref;
974         struct strbuf key = STRBUF_INIT;
975         struct strbuf branch_top = STRBUF_INIT, reflog_msg = STRBUF_INIT;
976         struct transport *transport = NULL;
977         const char *src_ref_prefix = "refs/heads/";
978         struct remote *remote;
979         int err = 0, complete_refs_before_fetch = 1;
980         int submodule_progress;
981
982         struct strvec ref_prefixes = STRVEC_INIT;
983
984         packet_trace_identity("clone");
985
986         git_config(git_clone_config, NULL);
987
988         argc = parse_options(argc, argv, prefix, builtin_clone_options,
989                              builtin_clone_usage, 0);
990
991         if (argc > 2)
992                 usage_msg_opt(_("Too many arguments."),
993                         builtin_clone_usage, builtin_clone_options);
994
995         if (argc == 0)
996                 usage_msg_opt(_("You must specify a repository to clone."),
997                         builtin_clone_usage, builtin_clone_options);
998
999         if (option_depth || option_since || option_not.nr)
1000                 deepen = 1;
1001         if (option_single_branch == -1)
1002                 option_single_branch = deepen ? 1 : 0;
1003
1004         if (option_mirror)
1005                 option_bare = 1;
1006
1007         if (option_bare) {
1008                 if (option_origin)
1009                         die(_("--bare and --origin %s options are incompatible."),
1010                             option_origin);
1011                 if (real_git_dir)
1012                         die(_("--bare and --separate-git-dir are incompatible."));
1013                 option_no_checkout = 1;
1014         }
1015
1016         repo_name = argv[0];
1017
1018         path = get_repo_path(repo_name, &is_bundle);
1019         if (path)
1020                 repo = absolute_pathdup(repo_name);
1021         else if (strchr(repo_name, ':')) {
1022                 repo = repo_name;
1023                 display_repo = transport_anonymize_url(repo);
1024         } else
1025                 die(_("repository '%s' does not exist"), repo_name);
1026
1027         /* no need to be strict, transport_set_option() will validate it again */
1028         if (option_depth && atoi(option_depth) < 1)
1029                 die(_("depth %s is not a positive number"), option_depth);
1030
1031         if (argc == 2)
1032                 dir = xstrdup(argv[1]);
1033         else
1034                 dir = guess_dir_name(repo_name, is_bundle, option_bare);
1035         strip_trailing_slashes(dir);
1036
1037         dest_exists = path_exists(dir);
1038         if (dest_exists && !is_empty_dir(dir))
1039                 die(_("destination path '%s' already exists and is not "
1040                         "an empty directory."), dir);
1041
1042         if (real_git_dir) {
1043                 real_dest_exists = path_exists(real_git_dir);
1044                 if (real_dest_exists && !is_empty_dir(real_git_dir))
1045                         die(_("repository path '%s' already exists and is not "
1046                                 "an empty directory."), real_git_dir);
1047         }
1048
1049
1050         strbuf_addf(&reflog_msg, "clone: from %s",
1051                     display_repo ? display_repo : repo);
1052         free(display_repo);
1053
1054         if (option_bare)
1055                 work_tree = NULL;
1056         else {
1057                 work_tree = getenv("GIT_WORK_TREE");
1058                 if (work_tree && path_exists(work_tree))
1059                         die(_("working tree '%s' already exists."), work_tree);
1060         }
1061
1062         if (option_bare || work_tree)
1063                 git_dir = xstrdup(dir);
1064         else {
1065                 work_tree = dir;
1066                 git_dir = mkpathdup("%s/.git", dir);
1067         }
1068
1069         atexit(remove_junk);
1070         sigchain_push_common(remove_junk_on_signal);
1071
1072         if (!option_bare) {
1073                 if (safe_create_leading_directories_const(work_tree) < 0)
1074                         die_errno(_("could not create leading directories of '%s'"),
1075                                   work_tree);
1076                 if (dest_exists)
1077                         junk_work_tree_flags |= REMOVE_DIR_KEEP_TOPLEVEL;
1078                 else if (mkdir(work_tree, 0777))
1079                         die_errno(_("could not create work tree dir '%s'"),
1080                                   work_tree);
1081                 junk_work_tree = work_tree;
1082                 set_git_work_tree(work_tree);
1083         }
1084
1085         if (real_git_dir) {
1086                 if (real_dest_exists)
1087                         junk_git_dir_flags |= REMOVE_DIR_KEEP_TOPLEVEL;
1088                 junk_git_dir = real_git_dir;
1089         } else {
1090                 if (dest_exists)
1091                         junk_git_dir_flags |= REMOVE_DIR_KEEP_TOPLEVEL;
1092                 junk_git_dir = git_dir;
1093         }
1094         if (safe_create_leading_directories_const(git_dir) < 0)
1095                 die(_("could not create leading directories of '%s'"), git_dir);
1096
1097         if (0 <= option_verbosity) {
1098                 if (option_bare)
1099                         fprintf(stderr, _("Cloning into bare repository '%s'...\n"), dir);
1100                 else
1101                         fprintf(stderr, _("Cloning into '%s'...\n"), dir);
1102         }
1103
1104         if (option_recurse_submodules.nr > 0) {
1105                 struct string_list_item *item;
1106                 struct strbuf sb = STRBUF_INIT;
1107
1108                 /* remove duplicates */
1109                 string_list_sort(&option_recurse_submodules);
1110                 string_list_remove_duplicates(&option_recurse_submodules, 0);
1111
1112                 /*
1113                  * NEEDSWORK: In a multi-working-tree world, this needs to be
1114                  * set in the per-worktree config.
1115                  */
1116                 for_each_string_list_item(item, &option_recurse_submodules) {
1117                         strbuf_addf(&sb, "submodule.active=%s",
1118                                     item->string);
1119                         string_list_append(&option_config,
1120                                            strbuf_detach(&sb, NULL));
1121                 }
1122
1123                 if (option_required_reference.nr &&
1124                     option_optional_reference.nr)
1125                         die(_("clone --recursive is not compatible with "
1126                               "both --reference and --reference-if-able"));
1127                 else if (option_required_reference.nr) {
1128                         string_list_append(&option_config,
1129                                 "submodule.alternateLocation=superproject");
1130                         string_list_append(&option_config,
1131                                 "submodule.alternateErrorStrategy=die");
1132                 } else if (option_optional_reference.nr) {
1133                         string_list_append(&option_config,
1134                                 "submodule.alternateLocation=superproject");
1135                         string_list_append(&option_config,
1136                                 "submodule.alternateErrorStrategy=info");
1137                 }
1138         }
1139
1140         init_db(git_dir, real_git_dir, option_template, GIT_HASH_UNKNOWN, NULL,
1141                 INIT_DB_QUIET);
1142
1143         if (real_git_dir)
1144                 git_dir = real_git_dir;
1145
1146         /*
1147          * additional config can be injected with -c, make sure it's included
1148          * after init_db, which clears the entire config environment.
1149          */
1150         write_config(&option_config);
1151
1152         /*
1153          * re-read config after init_db and write_config to pick up any config
1154          * injected by --template and --config, respectively.
1155          */
1156         git_config(git_clone_config, NULL);
1157
1158         /*
1159          * apply the remote name provided by --origin only after this second
1160          * call to git_config, to ensure it overrides all config-based values.
1161          */
1162         if (option_origin != NULL)
1163                 remote_name = xstrdup(option_origin);
1164
1165         if (remote_name == NULL)
1166                 remote_name = xstrdup("origin");
1167
1168         if (!valid_remote_name(remote_name))
1169                 die(_("'%s' is not a valid remote name"), remote_name);
1170
1171         if (option_bare) {
1172                 if (option_mirror)
1173                         src_ref_prefix = "refs/";
1174                 strbuf_addstr(&branch_top, src_ref_prefix);
1175
1176                 git_config_set("core.bare", "true");
1177         } else {
1178                 strbuf_addf(&branch_top, "refs/remotes/%s/", remote_name);
1179         }
1180
1181         strbuf_addf(&key, "remote.%s.url", remote_name);
1182         git_config_set(key.buf, repo);
1183         strbuf_reset(&key);
1184
1185         if (option_no_tags) {
1186                 strbuf_addf(&key, "remote.%s.tagOpt", remote_name);
1187                 git_config_set(key.buf, "--no-tags");
1188                 strbuf_reset(&key);
1189         }
1190
1191         if (option_required_reference.nr || option_optional_reference.nr)
1192                 setup_reference();
1193
1194         if (option_sparse_checkout && git_sparse_checkout_init(dir))
1195                 return 1;
1196
1197         remote = remote_get(remote_name);
1198
1199         refspec_appendf(&remote->fetch, "+%s*:%s*", src_ref_prefix,
1200                         branch_top.buf);
1201
1202         transport = transport_get(remote, remote->url[0]);
1203         transport_set_verbosity(transport, option_verbosity, option_progress);
1204         transport->family = family;
1205
1206         path = get_repo_path(remote->url[0], &is_bundle);
1207         is_local = option_local != 0 && path && !is_bundle;
1208         if (is_local) {
1209                 if (option_depth)
1210                         warning(_("--depth is ignored in local clones; use file:// instead."));
1211                 if (option_since)
1212                         warning(_("--shallow-since is ignored in local clones; use file:// instead."));
1213                 if (option_not.nr)
1214                         warning(_("--shallow-exclude is ignored in local clones; use file:// instead."));
1215                 if (filter_options.choice)
1216                         warning(_("--filter is ignored in local clones; use file:// instead."));
1217                 if (!access(mkpath("%s/shallow", path), F_OK)) {
1218                         if (option_local > 0)
1219                                 warning(_("source repository is shallow, ignoring --local"));
1220                         is_local = 0;
1221                 }
1222         }
1223         if (option_local > 0 && !is_local)
1224                 warning(_("--local is ignored"));
1225         transport->cloning = 1;
1226
1227         transport_set_option(transport, TRANS_OPT_KEEP, "yes");
1228
1229         if (option_depth)
1230                 transport_set_option(transport, TRANS_OPT_DEPTH,
1231                                      option_depth);
1232         if (option_since)
1233                 transport_set_option(transport, TRANS_OPT_DEEPEN_SINCE,
1234                                      option_since);
1235         if (option_not.nr)
1236                 transport_set_option(transport, TRANS_OPT_DEEPEN_NOT,
1237                                      (const char *)&option_not);
1238         if (option_single_branch)
1239                 transport_set_option(transport, TRANS_OPT_FOLLOWTAGS, "1");
1240
1241         if (option_upload_pack)
1242                 transport_set_option(transport, TRANS_OPT_UPLOADPACK,
1243                                      option_upload_pack);
1244
1245         if (server_options.nr)
1246                 transport->server_options = &server_options;
1247
1248         if (filter_options.choice) {
1249                 const char *spec =
1250                         expand_list_objects_filter_spec(&filter_options);
1251                 transport_set_option(transport, TRANS_OPT_LIST_OBJECTS_FILTER,
1252                                      spec);
1253                 transport_set_option(transport, TRANS_OPT_FROM_PROMISOR, "1");
1254         }
1255
1256         if (transport->smart_options && !deepen && !filter_options.choice)
1257                 transport->smart_options->check_self_contained_and_connected = 1;
1258
1259
1260         strvec_push(&ref_prefixes, "HEAD");
1261         refspec_ref_prefixes(&remote->fetch, &ref_prefixes);
1262         if (option_branch)
1263                 expand_ref_prefix(&ref_prefixes, option_branch);
1264         if (!option_no_tags)
1265                 strvec_push(&ref_prefixes, "refs/tags/");
1266
1267         refs = transport_get_remote_refs(transport, &ref_prefixes);
1268
1269         if (refs) {
1270                 int hash_algo = hash_algo_by_ptr(transport_get_hash_algo(transport));
1271
1272                 /*
1273                  * Now that we know what algorithm the remote side is using,
1274                  * let's set ours to the same thing.
1275                  */
1276                 initialize_repository_version(hash_algo, 1);
1277                 repo_set_hash_algo(the_repository, hash_algo);
1278
1279                 mapped_refs = wanted_peer_refs(refs, &remote->fetch);
1280                 /*
1281                  * transport_get_remote_refs() may return refs with null sha-1
1282                  * in mapped_refs (see struct transport->get_refs_list
1283                  * comment). In that case we need fetch it early because
1284                  * remote_head code below relies on it.
1285                  *
1286                  * for normal clones, transport_get_remote_refs() should
1287                  * return reliable ref set, we can delay cloning until after
1288                  * remote HEAD check.
1289                  */
1290                 for (ref = refs; ref; ref = ref->next)
1291                         if (is_null_oid(&ref->old_oid)) {
1292                                 complete_refs_before_fetch = 0;
1293                                 break;
1294                         }
1295
1296                 if (!is_local && !complete_refs_before_fetch) {
1297                         err = transport_fetch_refs(transport, mapped_refs);
1298                         if (err)
1299                                 goto cleanup;
1300                 }
1301
1302                 remote_head = find_ref_by_name(refs, "HEAD");
1303                 remote_head_points_at =
1304                         guess_remote_head(remote_head, mapped_refs, 0);
1305
1306                 if (option_branch) {
1307                         our_head_points_at =
1308                                 find_remote_branch(mapped_refs, option_branch);
1309
1310                         if (!our_head_points_at)
1311                                 die(_("Remote branch %s not found in upstream %s"),
1312                                     option_branch, remote_name);
1313                 }
1314                 else
1315                         our_head_points_at = remote_head_points_at;
1316         }
1317         else {
1318                 if (option_branch)
1319                         die(_("Remote branch %s not found in upstream %s"),
1320                                         option_branch, remote_name);
1321
1322                 warning(_("You appear to have cloned an empty repository."));
1323                 mapped_refs = NULL;
1324                 our_head_points_at = NULL;
1325                 remote_head_points_at = NULL;
1326                 remote_head = NULL;
1327                 option_no_checkout = 1;
1328                 if (!option_bare) {
1329                         const char *branch = git_default_branch_name(0);
1330                         char *ref = xstrfmt("refs/heads/%s", branch);
1331
1332                         install_branch_config(0, branch, remote_name, ref);
1333                         free(ref);
1334                 }
1335         }
1336
1337         write_refspec_config(src_ref_prefix, our_head_points_at,
1338                         remote_head_points_at, &branch_top);
1339
1340         if (filter_options.choice)
1341                 partial_clone_register(remote_name, &filter_options);
1342
1343         if (is_local)
1344                 clone_local(path, git_dir);
1345         else if (refs && complete_refs_before_fetch) {
1346                 err = transport_fetch_refs(transport, mapped_refs);
1347                 if (err)
1348                         goto cleanup;
1349         }
1350
1351         update_remote_refs(refs, mapped_refs, remote_head_points_at,
1352                            branch_top.buf, reflog_msg.buf, transport,
1353                            !is_local);
1354
1355         update_head(our_head_points_at, remote_head, reflog_msg.buf);
1356
1357         /*
1358          * We want to show progress for recursive submodule clones iff
1359          * we did so for the main clone. But only the transport knows
1360          * the final decision for this flag, so we need to rescue the value
1361          * before we free the transport.
1362          */
1363         submodule_progress = transport->progress;
1364
1365         transport_unlock_pack(transport);
1366         transport_disconnect(transport);
1367
1368         if (option_dissociate) {
1369                 close_object_store(the_repository->objects);
1370                 dissociate_from_references();
1371         }
1372
1373         junk_mode = JUNK_LEAVE_REPO;
1374         err = checkout(submodule_progress);
1375
1376 cleanup:
1377         free(remote_name);
1378         strbuf_release(&reflog_msg);
1379         strbuf_release(&branch_top);
1380         strbuf_release(&key);
1381         junk_mode = JUNK_LEAVE_ALL;
1382
1383         strvec_clear(&ref_prefixes);
1384         return err;
1385 }