Merge branch 'rs/pack-sort-with-llist-mergesort'
[git.git] / builtin / clone.c
blob404c5e80226c81a8f051e63fa8e40286fea95a18
1 /*
2 * Builtin "git clone"
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
8 * Clone a repository into a different directory that does not yet exist.
9 */
11 #include "builtin.h"
12 #include "lockfile.h"
13 #include "parse-options.h"
14 #include "fetch-pack.h"
15 #include "refs.h"
16 #include "tree.h"
17 #include "tree-walk.h"
18 #include "unpack-trees.h"
19 #include "transport.h"
20 #include "strbuf.h"
21 #include "dir.h"
22 #include "sigchain.h"
23 #include "branch.h"
24 #include "remote.h"
25 #include "run-command.h"
26 #include "connected.h"
29 * Overall FIXMEs:
30 * - respect DB_ENVIRONMENT for .git/objects.
32 * Implementation notes:
33 * - dropping use-separate-remote and no-separate-remote compatibility
36 static const char * const builtin_clone_usage[] = {
37 N_("git clone [<options>] [--] <repo> [<dir>]"),
38 NULL
41 static int option_no_checkout, option_bare, option_mirror, option_single_branch = -1;
42 static int option_local = -1, option_no_hardlinks, option_shared, option_recursive;
43 static int option_shallow_submodules;
44 static char *option_template, *option_depth;
45 static char *option_origin = NULL;
46 static char *option_branch = NULL;
47 static const char *real_git_dir;
48 static char *option_upload_pack = "git-upload-pack";
49 static int option_verbosity;
50 static int option_progress = -1;
51 static enum transport_family family;
52 static struct string_list option_config = STRING_LIST_INIT_NODUP;
53 static struct string_list option_required_reference = STRING_LIST_INIT_NODUP;
54 static struct string_list option_optional_reference = STRING_LIST_INIT_NODUP;
55 static int option_dissociate;
56 static int max_jobs = -1;
58 static struct option builtin_clone_options[] = {
59 OPT__VERBOSITY(&option_verbosity),
60 OPT_BOOL(0, "progress", &option_progress,
61 N_("force progress reporting")),
62 OPT_BOOL('n', "no-checkout", &option_no_checkout,
63 N_("don't create a checkout")),
64 OPT_BOOL(0, "bare", &option_bare, N_("create a bare repository")),
65 OPT_HIDDEN_BOOL(0, "naked", &option_bare,
66 N_("create a bare repository")),
67 OPT_BOOL(0, "mirror", &option_mirror,
68 N_("create a mirror repository (implies bare)")),
69 OPT_BOOL('l', "local", &option_local,
70 N_("to clone from a local repository")),
71 OPT_BOOL(0, "no-hardlinks", &option_no_hardlinks,
72 N_("don't use local hardlinks, always copy")),
73 OPT_BOOL('s', "shared", &option_shared,
74 N_("setup as shared repository")),
75 OPT_BOOL(0, "recursive", &option_recursive,
76 N_("initialize submodules in the clone")),
77 OPT_BOOL(0, "recurse-submodules", &option_recursive,
78 N_("initialize submodules in the clone")),
79 OPT_INTEGER('j', "jobs", &max_jobs,
80 N_("number of submodules cloned in parallel")),
81 OPT_STRING(0, "template", &option_template, N_("template-directory"),
82 N_("directory from which templates will be used")),
83 OPT_STRING_LIST(0, "reference", &option_required_reference, N_("repo"),
84 N_("reference repository")),
85 OPT_STRING_LIST(0, "reference-if-able", &option_optional_reference,
86 N_("repo"), N_("reference repository")),
87 OPT_BOOL(0, "dissociate", &option_dissociate,
88 N_("use --reference only while cloning")),
89 OPT_STRING('o', "origin", &option_origin, N_("name"),
90 N_("use <name> instead of 'origin' to track upstream")),
91 OPT_STRING('b', "branch", &option_branch, N_("branch"),
92 N_("checkout <branch> instead of the remote's HEAD")),
93 OPT_STRING('u', "upload-pack", &option_upload_pack, N_("path"),
94 N_("path to git-upload-pack on the remote")),
95 OPT_STRING(0, "depth", &option_depth, N_("depth"),
96 N_("create a shallow clone of that depth")),
97 OPT_BOOL(0, "single-branch", &option_single_branch,
98 N_("clone only one branch, HEAD or --branch")),
99 OPT_BOOL(0, "shallow-submodules", &option_shallow_submodules,
100 N_("any cloned submodules will be shallow")),
101 OPT_STRING(0, "separate-git-dir", &real_git_dir, N_("gitdir"),
102 N_("separate git dir from working tree")),
103 OPT_STRING_LIST('c', "config", &option_config, N_("key=value"),
104 N_("set config inside the new repository")),
105 OPT_SET_INT('4', "ipv4", &family, N_("use IPv4 addresses only"),
106 TRANSPORT_FAMILY_IPV4),
107 OPT_SET_INT('6', "ipv6", &family, N_("use IPv6 addresses only"),
108 TRANSPORT_FAMILY_IPV6),
109 OPT_END()
112 static const char *get_repo_path_1(struct strbuf *path, int *is_bundle)
114 static char *suffix[] = { "/.git", "", ".git/.git", ".git" };
115 static char *bundle_suffix[] = { ".bundle", "" };
116 size_t baselen = path->len;
117 struct stat st;
118 int i;
120 for (i = 0; i < ARRAY_SIZE(suffix); i++) {
121 strbuf_setlen(path, baselen);
122 strbuf_addstr(path, suffix[i]);
123 if (stat(path->buf, &st))
124 continue;
125 if (S_ISDIR(st.st_mode) && is_git_directory(path->buf)) {
126 *is_bundle = 0;
127 return path->buf;
128 } else if (S_ISREG(st.st_mode) && st.st_size > 8) {
129 /* Is it a "gitfile"? */
130 char signature[8];
131 const char *dst;
132 int len, fd = open(path->buf, O_RDONLY);
133 if (fd < 0)
134 continue;
135 len = read_in_full(fd, signature, 8);
136 close(fd);
137 if (len != 8 || strncmp(signature, "gitdir: ", 8))
138 continue;
139 dst = read_gitfile(path->buf);
140 if (dst) {
141 *is_bundle = 0;
142 return dst;
147 for (i = 0; i < ARRAY_SIZE(bundle_suffix); i++) {
148 strbuf_setlen(path, baselen);
149 strbuf_addstr(path, bundle_suffix[i]);
150 if (!stat(path->buf, &st) && S_ISREG(st.st_mode)) {
151 *is_bundle = 1;
152 return path->buf;
156 return NULL;
159 static char *get_repo_path(const char *repo, int *is_bundle)
161 struct strbuf path = STRBUF_INIT;
162 const char *raw;
163 char *canon;
165 strbuf_addstr(&path, repo);
166 raw = get_repo_path_1(&path, is_bundle);
167 canon = raw ? xstrdup(absolute_path(raw)) : NULL;
168 strbuf_release(&path);
169 return canon;
172 static char *guess_dir_name(const char *repo, int is_bundle, int is_bare)
174 const char *end = repo + strlen(repo), *start, *ptr;
175 size_t len;
176 char *dir;
179 * Skip scheme.
181 start = strstr(repo, "://");
182 if (start == NULL)
183 start = repo;
184 else
185 start += 3;
188 * Skip authentication data. The stripping does happen
189 * greedily, such that we strip up to the last '@' inside
190 * the host part.
192 for (ptr = start; ptr < end && !is_dir_sep(*ptr); ptr++) {
193 if (*ptr == '@')
194 start = ptr + 1;
198 * Strip trailing spaces, slashes and /.git
200 while (start < end && (is_dir_sep(end[-1]) || isspace(end[-1])))
201 end--;
202 if (end - start > 5 && is_dir_sep(end[-5]) &&
203 !strncmp(end - 4, ".git", 4)) {
204 end -= 5;
205 while (start < end && is_dir_sep(end[-1]))
206 end--;
210 * Strip trailing port number if we've got only a
211 * hostname (that is, there is no dir separator but a
212 * colon). This check is required such that we do not
213 * strip URI's like '/foo/bar:2222.git', which should
214 * result in a dir '2222' being guessed due to backwards
215 * compatibility.
217 if (memchr(start, '/', end - start) == NULL
218 && memchr(start, ':', end - start) != NULL) {
219 ptr = end;
220 while (start < ptr && isdigit(ptr[-1]) && ptr[-1] != ':')
221 ptr--;
222 if (start < ptr && ptr[-1] == ':')
223 end = ptr - 1;
227 * Find last component. To remain backwards compatible we
228 * also regard colons as path separators, such that
229 * cloning a repository 'foo:bar.git' would result in a
230 * directory 'bar' being guessed.
232 ptr = end;
233 while (start < ptr && !is_dir_sep(ptr[-1]) && ptr[-1] != ':')
234 ptr--;
235 start = ptr;
238 * Strip .{bundle,git}.
240 len = end - start;
241 strip_suffix_mem(start, &len, is_bundle ? ".bundle" : ".git");
243 if (!len || (len == 1 && *start == '/'))
244 die(_("No directory name could be guessed.\n"
245 "Please specify a directory on the command line"));
247 if (is_bare)
248 dir = xstrfmt("%.*s.git", (int)len, start);
249 else
250 dir = xstrndup(start, len);
252 * Replace sequences of 'control' characters and whitespace
253 * with one ascii space, remove leading and trailing spaces.
255 if (*dir) {
256 char *out = dir;
257 int prev_space = 1 /* strip leading whitespace */;
258 for (end = dir; *end; ++end) {
259 char ch = *end;
260 if ((unsigned char)ch < '\x20')
261 ch = '\x20';
262 if (isspace(ch)) {
263 if (prev_space)
264 continue;
265 prev_space = 1;
266 } else
267 prev_space = 0;
268 *out++ = ch;
270 *out = '\0';
271 if (out > dir && prev_space)
272 out[-1] = '\0';
274 return dir;
277 static void strip_trailing_slashes(char *dir)
279 char *end = dir + strlen(dir);
281 while (dir < end - 1 && is_dir_sep(end[-1]))
282 end--;
283 *end = '\0';
286 static int add_one_reference(struct string_list_item *item, void *cb_data)
288 struct strbuf err = STRBUF_INIT;
289 int *required = cb_data;
290 char *ref_git = compute_alternate_path(item->string, &err);
292 if (!ref_git) {
293 if (*required)
294 die("%s", err.buf);
295 else
296 fprintf(stderr,
297 _("info: Could not add alternate for '%s': %s\n"),
298 item->string, err.buf);
299 } else {
300 struct strbuf sb = STRBUF_INIT;
301 strbuf_addf(&sb, "%s/objects", ref_git);
302 add_to_alternates_file(sb.buf);
303 strbuf_release(&sb);
306 strbuf_release(&err);
307 free(ref_git);
308 return 0;
311 static void setup_reference(void)
313 int required = 1;
314 for_each_string_list(&option_required_reference,
315 add_one_reference, &required);
316 required = 0;
317 for_each_string_list(&option_optional_reference,
318 add_one_reference, &required);
321 static void copy_alternates(struct strbuf *src, struct strbuf *dst,
322 const char *src_repo)
325 * Read from the source objects/info/alternates file
326 * and copy the entries to corresponding file in the
327 * destination repository with add_to_alternates_file().
328 * Both src and dst have "$path/objects/info/alternates".
330 * Instead of copying bit-for-bit from the original,
331 * we need to append to existing one so that the already
332 * created entry via "clone -s" is not lost, and also
333 * to turn entries with paths relative to the original
334 * absolute, so that they can be used in the new repository.
336 FILE *in = fopen(src->buf, "r");
337 struct strbuf line = STRBUF_INIT;
339 while (strbuf_getline(&line, in) != EOF) {
340 char *abs_path;
341 if (!line.len || line.buf[0] == '#')
342 continue;
343 if (is_absolute_path(line.buf)) {
344 add_to_alternates_file(line.buf);
345 continue;
347 abs_path = mkpathdup("%s/objects/%s", src_repo, line.buf);
348 normalize_path_copy(abs_path, abs_path);
349 add_to_alternates_file(abs_path);
350 free(abs_path);
352 strbuf_release(&line);
353 fclose(in);
356 static void copy_or_link_directory(struct strbuf *src, struct strbuf *dest,
357 const char *src_repo, int src_baselen)
359 struct dirent *de;
360 struct stat buf;
361 int src_len, dest_len;
362 DIR *dir;
364 dir = opendir(src->buf);
365 if (!dir)
366 die_errno(_("failed to open '%s'"), src->buf);
368 if (mkdir(dest->buf, 0777)) {
369 if (errno != EEXIST)
370 die_errno(_("failed to create directory '%s'"), dest->buf);
371 else if (stat(dest->buf, &buf))
372 die_errno(_("failed to stat '%s'"), dest->buf);
373 else if (!S_ISDIR(buf.st_mode))
374 die(_("%s exists and is not a directory"), dest->buf);
377 strbuf_addch(src, '/');
378 src_len = src->len;
379 strbuf_addch(dest, '/');
380 dest_len = dest->len;
382 while ((de = readdir(dir)) != NULL) {
383 strbuf_setlen(src, src_len);
384 strbuf_addstr(src, de->d_name);
385 strbuf_setlen(dest, dest_len);
386 strbuf_addstr(dest, de->d_name);
387 if (stat(src->buf, &buf)) {
388 warning (_("failed to stat %s\n"), src->buf);
389 continue;
391 if (S_ISDIR(buf.st_mode)) {
392 if (de->d_name[0] != '.')
393 copy_or_link_directory(src, dest,
394 src_repo, src_baselen);
395 continue;
398 /* Files that cannot be copied bit-for-bit... */
399 if (!strcmp(src->buf + src_baselen, "/info/alternates")) {
400 copy_alternates(src, dest, src_repo);
401 continue;
404 if (unlink(dest->buf) && errno != ENOENT)
405 die_errno(_("failed to unlink '%s'"), dest->buf);
406 if (!option_no_hardlinks) {
407 if (!link(src->buf, dest->buf))
408 continue;
409 if (option_local > 0)
410 die_errno(_("failed to create link '%s'"), dest->buf);
411 option_no_hardlinks = 1;
413 if (copy_file_with_time(dest->buf, src->buf, 0666))
414 die_errno(_("failed to copy file to '%s'"), dest->buf);
416 closedir(dir);
419 static void clone_local(const char *src_repo, const char *dest_repo)
421 if (option_shared) {
422 struct strbuf alt = STRBUF_INIT;
423 strbuf_addf(&alt, "%s/objects", src_repo);
424 add_to_alternates_file(alt.buf);
425 strbuf_release(&alt);
426 } else {
427 struct strbuf src = STRBUF_INIT;
428 struct strbuf dest = STRBUF_INIT;
429 get_common_dir(&src, src_repo);
430 get_common_dir(&dest, dest_repo);
431 strbuf_addstr(&src, "/objects");
432 strbuf_addstr(&dest, "/objects");
433 copy_or_link_directory(&src, &dest, src_repo, src.len);
434 strbuf_release(&src);
435 strbuf_release(&dest);
438 if (0 <= option_verbosity)
439 fprintf(stderr, _("done.\n"));
442 static const char *junk_work_tree;
443 static const char *junk_git_dir;
444 static enum {
445 JUNK_LEAVE_NONE,
446 JUNK_LEAVE_REPO,
447 JUNK_LEAVE_ALL
448 } junk_mode = JUNK_LEAVE_NONE;
450 static const char junk_leave_repo_msg[] =
451 N_("Clone succeeded, but checkout failed.\n"
452 "You can inspect what was checked out with 'git status'\n"
453 "and retry the checkout with 'git checkout -f HEAD'\n");
455 static void remove_junk(void)
457 struct strbuf sb = STRBUF_INIT;
459 switch (junk_mode) {
460 case JUNK_LEAVE_REPO:
461 warning("%s", _(junk_leave_repo_msg));
462 /* fall-through */
463 case JUNK_LEAVE_ALL:
464 return;
465 default:
466 /* proceed to removal */
467 break;
470 if (junk_git_dir) {
471 strbuf_addstr(&sb, junk_git_dir);
472 remove_dir_recursively(&sb, 0);
473 strbuf_reset(&sb);
475 if (junk_work_tree) {
476 strbuf_addstr(&sb, junk_work_tree);
477 remove_dir_recursively(&sb, 0);
478 strbuf_reset(&sb);
482 static void remove_junk_on_signal(int signo)
484 remove_junk();
485 sigchain_pop(signo);
486 raise(signo);
489 static struct ref *find_remote_branch(const struct ref *refs, const char *branch)
491 struct ref *ref;
492 struct strbuf head = STRBUF_INIT;
493 strbuf_addstr(&head, "refs/heads/");
494 strbuf_addstr(&head, branch);
495 ref = find_ref_by_name(refs, head.buf);
496 strbuf_release(&head);
498 if (ref)
499 return ref;
501 strbuf_addstr(&head, "refs/tags/");
502 strbuf_addstr(&head, branch);
503 ref = find_ref_by_name(refs, head.buf);
504 strbuf_release(&head);
506 return ref;
509 static struct ref *wanted_peer_refs(const struct ref *refs,
510 struct refspec *refspec)
512 struct ref *head = copy_ref(find_ref_by_name(refs, "HEAD"));
513 struct ref *local_refs = head;
514 struct ref **tail = head ? &head->next : &local_refs;
516 if (option_single_branch) {
517 struct ref *remote_head = NULL;
519 if (!option_branch)
520 remote_head = guess_remote_head(head, refs, 0);
521 else {
522 local_refs = NULL;
523 tail = &local_refs;
524 remote_head = copy_ref(find_remote_branch(refs, option_branch));
527 if (!remote_head && option_branch)
528 warning(_("Could not find remote branch %s to clone."),
529 option_branch);
530 else {
531 get_fetch_map(remote_head, refspec, &tail, 0);
533 /* if --branch=tag, pull the requested tag explicitly */
534 get_fetch_map(remote_head, tag_refspec, &tail, 0);
536 } else
537 get_fetch_map(refs, refspec, &tail, 0);
539 if (!option_mirror && !option_single_branch)
540 get_fetch_map(refs, tag_refspec, &tail, 0);
542 return local_refs;
545 static void write_remote_refs(const struct ref *local_refs)
547 const struct ref *r;
549 struct ref_transaction *t;
550 struct strbuf err = STRBUF_INIT;
552 t = ref_transaction_begin(&err);
553 if (!t)
554 die("%s", err.buf);
556 for (r = local_refs; r; r = r->next) {
557 if (!r->peer_ref)
558 continue;
559 if (ref_transaction_create(t, r->peer_ref->name, r->old_oid.hash,
560 0, NULL, &err))
561 die("%s", err.buf);
564 if (initial_ref_transaction_commit(t, &err))
565 die("%s", err.buf);
567 strbuf_release(&err);
568 ref_transaction_free(t);
571 static void write_followtags(const struct ref *refs, const char *msg)
573 const struct ref *ref;
574 for (ref = refs; ref; ref = ref->next) {
575 if (!starts_with(ref->name, "refs/tags/"))
576 continue;
577 if (ends_with(ref->name, "^{}"))
578 continue;
579 if (!has_object_file(&ref->old_oid))
580 continue;
581 update_ref(msg, ref->name, ref->old_oid.hash,
582 NULL, 0, UPDATE_REFS_DIE_ON_ERR);
586 static int iterate_ref_map(void *cb_data, unsigned char sha1[20])
588 struct ref **rm = cb_data;
589 struct ref *ref = *rm;
592 * Skip anything missing a peer_ref, which we are not
593 * actually going to write a ref for.
595 while (ref && !ref->peer_ref)
596 ref = ref->next;
597 /* Returning -1 notes "end of list" to the caller. */
598 if (!ref)
599 return -1;
601 hashcpy(sha1, ref->old_oid.hash);
602 *rm = ref->next;
603 return 0;
606 static void update_remote_refs(const struct ref *refs,
607 const struct ref *mapped_refs,
608 const struct ref *remote_head_points_at,
609 const char *branch_top,
610 const char *msg,
611 struct transport *transport,
612 int check_connectivity)
614 const struct ref *rm = mapped_refs;
616 if (check_connectivity) {
617 struct check_connected_options opt = CHECK_CONNECTED_INIT;
619 opt.transport = transport;
620 opt.progress = transport->progress;
622 if (check_connected(iterate_ref_map, &rm, &opt))
623 die(_("remote did not send all necessary objects"));
626 if (refs) {
627 write_remote_refs(mapped_refs);
628 if (option_single_branch)
629 write_followtags(refs, msg);
632 if (remote_head_points_at && !option_bare) {
633 struct strbuf head_ref = STRBUF_INIT;
634 strbuf_addstr(&head_ref, branch_top);
635 strbuf_addstr(&head_ref, "HEAD");
636 if (create_symref(head_ref.buf,
637 remote_head_points_at->peer_ref->name,
638 msg) < 0)
639 die(_("unable to update %s"), head_ref.buf);
640 strbuf_release(&head_ref);
644 static void update_head(const struct ref *our, const struct ref *remote,
645 const char *msg)
647 const char *head;
648 if (our && skip_prefix(our->name, "refs/heads/", &head)) {
649 /* Local default branch link */
650 if (create_symref("HEAD", our->name, NULL) < 0)
651 die(_("unable to update HEAD"));
652 if (!option_bare) {
653 update_ref(msg, "HEAD", our->old_oid.hash, NULL, 0,
654 UPDATE_REFS_DIE_ON_ERR);
655 install_branch_config(0, head, option_origin, our->name);
657 } else if (our) {
658 struct commit *c = lookup_commit_reference(our->old_oid.hash);
659 /* --branch specifies a non-branch (i.e. tags), detach HEAD */
660 update_ref(msg, "HEAD", c->object.oid.hash,
661 NULL, REF_NODEREF, UPDATE_REFS_DIE_ON_ERR);
662 } else if (remote) {
664 * We know remote HEAD points to a non-branch, or
665 * HEAD points to a branch but we don't know which one.
666 * Detach HEAD in all these cases.
668 update_ref(msg, "HEAD", remote->old_oid.hash,
669 NULL, REF_NODEREF, UPDATE_REFS_DIE_ON_ERR);
673 static int checkout(void)
675 unsigned char sha1[20];
676 char *head;
677 struct lock_file *lock_file;
678 struct unpack_trees_options opts;
679 struct tree *tree;
680 struct tree_desc t;
681 int err = 0;
683 if (option_no_checkout)
684 return 0;
686 head = resolve_refdup("HEAD", RESOLVE_REF_READING, sha1, NULL);
687 if (!head) {
688 warning(_("remote HEAD refers to nonexistent ref, "
689 "unable to checkout.\n"));
690 return 0;
692 if (!strcmp(head, "HEAD")) {
693 if (advice_detached_head)
694 detach_advice(sha1_to_hex(sha1));
695 } else {
696 if (!starts_with(head, "refs/heads/"))
697 die(_("HEAD not found below refs/heads!"));
699 free(head);
701 /* We need to be in the new work tree for the checkout */
702 setup_work_tree();
704 lock_file = xcalloc(1, sizeof(struct lock_file));
705 hold_locked_index(lock_file, 1);
707 memset(&opts, 0, sizeof opts);
708 opts.update = 1;
709 opts.merge = 1;
710 opts.fn = oneway_merge;
711 opts.verbose_update = (option_verbosity >= 0);
712 opts.src_index = &the_index;
713 opts.dst_index = &the_index;
715 tree = parse_tree_indirect(sha1);
716 parse_tree(tree);
717 init_tree_desc(&t, tree->buffer, tree->size);
718 if (unpack_trees(1, &t, &opts) < 0)
719 die(_("unable to checkout working tree"));
721 if (write_locked_index(&the_index, lock_file, COMMIT_LOCK))
722 die(_("unable to write new index file"));
724 err |= run_hook_le(NULL, "post-checkout", sha1_to_hex(null_sha1),
725 sha1_to_hex(sha1), "1", NULL);
727 if (!err && option_recursive) {
728 struct argv_array args = ARGV_ARRAY_INIT;
729 argv_array_pushl(&args, "submodule", "update", "--init", "--recursive", NULL);
731 if (option_shallow_submodules == 1)
732 argv_array_push(&args, "--depth=1");
734 if (max_jobs != -1)
735 argv_array_pushf(&args, "--jobs=%d", max_jobs);
737 err = run_command_v_opt(args.argv, RUN_GIT_CMD);
738 argv_array_clear(&args);
741 return err;
744 static int write_one_config(const char *key, const char *value, void *data)
746 return git_config_set_multivar_gently(key, value ? value : "true", "^$", 0);
749 static void write_config(struct string_list *config)
751 int i;
753 for (i = 0; i < config->nr; i++) {
754 if (git_config_parse_parameter(config->items[i].string,
755 write_one_config, NULL) < 0)
756 die(_("unable to write parameters to config file"));
760 static void write_refspec_config(const char *src_ref_prefix,
761 const struct ref *our_head_points_at,
762 const struct ref *remote_head_points_at,
763 struct strbuf *branch_top)
765 struct strbuf key = STRBUF_INIT;
766 struct strbuf value = STRBUF_INIT;
768 if (option_mirror || !option_bare) {
769 if (option_single_branch && !option_mirror) {
770 if (option_branch) {
771 if (starts_with(our_head_points_at->name, "refs/tags/"))
772 strbuf_addf(&value, "+%s:%s", our_head_points_at->name,
773 our_head_points_at->name);
774 else
775 strbuf_addf(&value, "+%s:%s%s", our_head_points_at->name,
776 branch_top->buf, option_branch);
777 } else if (remote_head_points_at) {
778 const char *head = remote_head_points_at->name;
779 if (!skip_prefix(head, "refs/heads/", &head))
780 die("BUG: remote HEAD points at non-head?");
782 strbuf_addf(&value, "+%s:%s%s", remote_head_points_at->name,
783 branch_top->buf, head);
786 * otherwise, the next "git fetch" will
787 * simply fetch from HEAD without updating
788 * any remote-tracking branch, which is what
789 * we want.
791 } else {
792 strbuf_addf(&value, "+%s*:%s*", src_ref_prefix, branch_top->buf);
794 /* Configure the remote */
795 if (value.len) {
796 strbuf_addf(&key, "remote.%s.fetch", option_origin);
797 git_config_set_multivar(key.buf, value.buf, "^$", 0);
798 strbuf_reset(&key);
800 if (option_mirror) {
801 strbuf_addf(&key, "remote.%s.mirror", option_origin);
802 git_config_set(key.buf, "true");
803 strbuf_reset(&key);
808 strbuf_release(&key);
809 strbuf_release(&value);
812 static void dissociate_from_references(void)
814 static const char* argv[] = { "repack", "-a", "-d", NULL };
815 char *alternates = git_pathdup("objects/info/alternates");
817 if (!access(alternates, F_OK)) {
818 if (run_command_v_opt(argv, RUN_GIT_CMD|RUN_COMMAND_NO_STDIN))
819 die(_("cannot repack to clean up"));
820 if (unlink(alternates) && errno != ENOENT)
821 die_errno(_("cannot unlink temporary alternates file"));
823 free(alternates);
826 int cmd_clone(int argc, const char **argv, const char *prefix)
828 int is_bundle = 0, is_local;
829 struct stat buf;
830 const char *repo_name, *repo, *work_tree, *git_dir;
831 char *path, *dir;
832 int dest_exists;
833 const struct ref *refs, *remote_head;
834 const struct ref *remote_head_points_at;
835 const struct ref *our_head_points_at;
836 struct ref *mapped_refs;
837 const struct ref *ref;
838 struct strbuf key = STRBUF_INIT, value = STRBUF_INIT;
839 struct strbuf branch_top = STRBUF_INIT, reflog_msg = STRBUF_INIT;
840 struct transport *transport = NULL;
841 const char *src_ref_prefix = "refs/heads/";
842 struct remote *remote;
843 int err = 0, complete_refs_before_fetch = 1;
845 struct refspec *refspec;
846 const char *fetch_pattern;
848 packet_trace_identity("clone");
849 argc = parse_options(argc, argv, prefix, builtin_clone_options,
850 builtin_clone_usage, 0);
852 if (argc > 2)
853 usage_msg_opt(_("Too many arguments."),
854 builtin_clone_usage, builtin_clone_options);
856 if (argc == 0)
857 usage_msg_opt(_("You must specify a repository to clone."),
858 builtin_clone_usage, builtin_clone_options);
860 if (option_single_branch == -1)
861 option_single_branch = option_depth ? 1 : 0;
863 if (option_mirror)
864 option_bare = 1;
866 if (option_bare) {
867 if (option_origin)
868 die(_("--bare and --origin %s options are incompatible."),
869 option_origin);
870 if (real_git_dir)
871 die(_("--bare and --separate-git-dir are incompatible."));
872 option_no_checkout = 1;
875 if (!option_origin)
876 option_origin = "origin";
878 repo_name = argv[0];
880 path = get_repo_path(repo_name, &is_bundle);
881 if (path)
882 repo = xstrdup(absolute_path(repo_name));
883 else if (!strchr(repo_name, ':'))
884 die(_("repository '%s' does not exist"), repo_name);
885 else
886 repo = repo_name;
888 /* no need to be strict, transport_set_option() will validate it again */
889 if (option_depth && atoi(option_depth) < 1)
890 die(_("depth %s is not a positive number"), option_depth);
892 if (argc == 2)
893 dir = xstrdup(argv[1]);
894 else
895 dir = guess_dir_name(repo_name, is_bundle, option_bare);
896 strip_trailing_slashes(dir);
898 dest_exists = !stat(dir, &buf);
899 if (dest_exists && !is_empty_dir(dir))
900 die(_("destination path '%s' already exists and is not "
901 "an empty directory."), dir);
903 strbuf_addf(&reflog_msg, "clone: from %s", repo);
905 if (option_bare)
906 work_tree = NULL;
907 else {
908 work_tree = getenv("GIT_WORK_TREE");
909 if (work_tree && !stat(work_tree, &buf))
910 die(_("working tree '%s' already exists."), work_tree);
913 if (option_bare || work_tree)
914 git_dir = xstrdup(dir);
915 else {
916 work_tree = dir;
917 git_dir = mkpathdup("%s/.git", dir);
920 atexit(remove_junk);
921 sigchain_push_common(remove_junk_on_signal);
923 if (!option_bare) {
924 if (safe_create_leading_directories_const(work_tree) < 0)
925 die_errno(_("could not create leading directories of '%s'"),
926 work_tree);
927 if (!dest_exists && mkdir(work_tree, 0777))
928 die_errno(_("could not create work tree dir '%s'"),
929 work_tree);
930 junk_work_tree = work_tree;
931 set_git_work_tree(work_tree);
934 junk_git_dir = git_dir;
935 if (safe_create_leading_directories_const(git_dir) < 0)
936 die(_("could not create leading directories of '%s'"), git_dir);
938 set_git_dir_init(git_dir, real_git_dir, 0);
939 if (real_git_dir) {
940 git_dir = real_git_dir;
941 junk_git_dir = real_git_dir;
944 if (0 <= option_verbosity) {
945 if (option_bare)
946 fprintf(stderr, _("Cloning into bare repository '%s'...\n"), dir);
947 else
948 fprintf(stderr, _("Cloning into '%s'...\n"), dir);
951 if (option_recursive) {
952 if (option_required_reference.nr &&
953 option_optional_reference.nr)
954 die(_("clone --recursive is not compatible with "
955 "both --reference and --reference-if-able"));
956 else if (option_required_reference.nr) {
957 string_list_append(&option_config,
958 "submodule.alternateLocation=superproject");
959 string_list_append(&option_config,
960 "submodule.alternateErrorStrategy=die");
961 } else if (option_optional_reference.nr) {
962 string_list_append(&option_config,
963 "submodule.alternateLocation=superproject");
964 string_list_append(&option_config,
965 "submodule.alternateErrorStrategy=info");
969 init_db(option_template, INIT_DB_QUIET);
970 write_config(&option_config);
972 git_config(git_default_config, NULL);
974 if (option_bare) {
975 if (option_mirror)
976 src_ref_prefix = "refs/";
977 strbuf_addstr(&branch_top, src_ref_prefix);
979 git_config_set("core.bare", "true");
980 } else {
981 strbuf_addf(&branch_top, "refs/remotes/%s/", option_origin);
984 strbuf_addf(&value, "+%s*:%s*", src_ref_prefix, branch_top.buf);
985 strbuf_addf(&key, "remote.%s.url", option_origin);
986 git_config_set(key.buf, repo);
987 strbuf_reset(&key);
989 if (option_required_reference.nr || option_optional_reference.nr)
990 setup_reference();
992 fetch_pattern = value.buf;
993 refspec = parse_fetch_refspec(1, &fetch_pattern);
995 strbuf_reset(&value);
997 remote = remote_get(option_origin);
998 transport = transport_get(remote, remote->url[0]);
999 transport_set_verbosity(transport, option_verbosity, option_progress);
1000 transport->family = family;
1002 path = get_repo_path(remote->url[0], &is_bundle);
1003 is_local = option_local != 0 && path && !is_bundle;
1004 if (is_local) {
1005 if (option_depth)
1006 warning(_("--depth is ignored in local clones; use file:// instead."));
1007 if (!access(mkpath("%s/shallow", path), F_OK)) {
1008 if (option_local > 0)
1009 warning(_("source repository is shallow, ignoring --local"));
1010 is_local = 0;
1013 if (option_local > 0 && !is_local)
1014 warning(_("--local is ignored"));
1015 transport->cloning = 1;
1017 if (!transport->get_refs_list || (!is_local && !transport->fetch))
1018 die(_("Don't know how to clone %s"), transport->url);
1020 transport_set_option(transport, TRANS_OPT_KEEP, "yes");
1022 if (option_depth)
1023 transport_set_option(transport, TRANS_OPT_DEPTH,
1024 option_depth);
1025 if (option_single_branch)
1026 transport_set_option(transport, TRANS_OPT_FOLLOWTAGS, "1");
1028 if (option_upload_pack)
1029 transport_set_option(transport, TRANS_OPT_UPLOADPACK,
1030 option_upload_pack);
1032 if (transport->smart_options && !option_depth)
1033 transport->smart_options->check_self_contained_and_connected = 1;
1035 refs = transport_get_remote_refs(transport);
1037 if (refs) {
1038 mapped_refs = wanted_peer_refs(refs, refspec);
1040 * transport_get_remote_refs() may return refs with null sha-1
1041 * in mapped_refs (see struct transport->get_refs_list
1042 * comment). In that case we need fetch it early because
1043 * remote_head code below relies on it.
1045 * for normal clones, transport_get_remote_refs() should
1046 * return reliable ref set, we can delay cloning until after
1047 * remote HEAD check.
1049 for (ref = refs; ref; ref = ref->next)
1050 if (is_null_oid(&ref->old_oid)) {
1051 complete_refs_before_fetch = 0;
1052 break;
1055 if (!is_local && !complete_refs_before_fetch)
1056 transport_fetch_refs(transport, mapped_refs);
1058 remote_head = find_ref_by_name(refs, "HEAD");
1059 remote_head_points_at =
1060 guess_remote_head(remote_head, mapped_refs, 0);
1062 if (option_branch) {
1063 our_head_points_at =
1064 find_remote_branch(mapped_refs, option_branch);
1066 if (!our_head_points_at)
1067 die(_("Remote branch %s not found in upstream %s"),
1068 option_branch, option_origin);
1070 else
1071 our_head_points_at = remote_head_points_at;
1073 else {
1074 if (option_branch)
1075 die(_("Remote branch %s not found in upstream %s"),
1076 option_branch, option_origin);
1078 warning(_("You appear to have cloned an empty repository."));
1079 mapped_refs = NULL;
1080 our_head_points_at = NULL;
1081 remote_head_points_at = NULL;
1082 remote_head = NULL;
1083 option_no_checkout = 1;
1084 if (!option_bare)
1085 install_branch_config(0, "master", option_origin,
1086 "refs/heads/master");
1089 write_refspec_config(src_ref_prefix, our_head_points_at,
1090 remote_head_points_at, &branch_top);
1092 if (is_local)
1093 clone_local(path, git_dir);
1094 else if (refs && complete_refs_before_fetch)
1095 transport_fetch_refs(transport, mapped_refs);
1097 update_remote_refs(refs, mapped_refs, remote_head_points_at,
1098 branch_top.buf, reflog_msg.buf, transport, !is_local);
1100 update_head(our_head_points_at, remote_head, reflog_msg.buf);
1102 transport_unlock_pack(transport);
1103 transport_disconnect(transport);
1105 if (option_dissociate) {
1106 close_all_packs();
1107 dissociate_from_references();
1110 junk_mode = JUNK_LEAVE_REPO;
1111 err = checkout();
1113 strbuf_release(&reflog_msg);
1114 strbuf_release(&branch_top);
1115 strbuf_release(&key);
1116 strbuf_release(&value);
1117 junk_mode = JUNK_LEAVE_ALL;
1119 free(refspec);
1120 return err;