Merge branch 'ye/doc-http-proto' into maint
[git.git] / builtin / clone.c
blob545105a86fdf07873948f2bbe7d1c4f6e65b1509
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 "parse-options.h"
13 #include "fetch-pack.h"
14 #include "refs.h"
15 #include "tree.h"
16 #include "tree-walk.h"
17 #include "unpack-trees.h"
18 #include "transport.h"
19 #include "strbuf.h"
20 #include "dir.h"
21 #include "sigchain.h"
22 #include "branch.h"
23 #include "remote.h"
24 #include "run-command.h"
25 #include "connected.h"
28 * Overall FIXMEs:
29 * - respect DB_ENVIRONMENT for .git/objects.
31 * Implementation notes:
32 * - dropping use-separate-remote and no-separate-remote compatibility
35 static const char * const builtin_clone_usage[] = {
36 N_("git clone [options] [--] <repo> [<dir>]"),
37 NULL
40 static int option_no_checkout, option_bare, option_mirror, option_single_branch = -1;
41 static int option_local = -1, option_no_hardlinks, option_shared, option_recursive;
42 static char *option_template, *option_depth;
43 static char *option_origin = NULL;
44 static char *option_branch = NULL;
45 static const char *real_git_dir;
46 static char *option_upload_pack = "git-upload-pack";
47 static int option_verbosity;
48 static int option_progress = -1;
49 static struct string_list option_config;
50 static struct string_list option_reference;
52 static int opt_parse_reference(const struct option *opt, const char *arg, int unset)
54 struct string_list *option_reference = opt->value;
55 if (!arg)
56 return -1;
57 string_list_append(option_reference, arg);
58 return 0;
61 static struct option builtin_clone_options[] = {
62 OPT__VERBOSITY(&option_verbosity),
63 OPT_BOOL(0, "progress", &option_progress,
64 N_("force progress reporting")),
65 OPT_BOOL('n', "no-checkout", &option_no_checkout,
66 N_("don't create a checkout")),
67 OPT_BOOL(0, "bare", &option_bare, N_("create a bare repository")),
68 OPT_HIDDEN_BOOL(0, "naked", &option_bare,
69 N_("create a bare repository")),
70 OPT_BOOL(0, "mirror", &option_mirror,
71 N_("create a mirror repository (implies bare)")),
72 OPT_BOOL('l', "local", &option_local,
73 N_("to clone from a local repository")),
74 OPT_BOOL(0, "no-hardlinks", &option_no_hardlinks,
75 N_("don't use local hardlinks, always copy")),
76 OPT_BOOL('s', "shared", &option_shared,
77 N_("setup as shared repository")),
78 OPT_BOOL(0, "recursive", &option_recursive,
79 N_("initialize submodules in the clone")),
80 OPT_BOOL(0, "recurse-submodules", &option_recursive,
81 N_("initialize submodules in the clone")),
82 OPT_STRING(0, "template", &option_template, N_("template-directory"),
83 N_("directory from which templates will be used")),
84 OPT_CALLBACK(0 , "reference", &option_reference, N_("repo"),
85 N_("reference repository"), &opt_parse_reference),
86 OPT_STRING('o', "origin", &option_origin, N_("name"),
87 N_("use <name> instead of 'origin' to track upstream")),
88 OPT_STRING('b', "branch", &option_branch, N_("branch"),
89 N_("checkout <branch> instead of the remote's HEAD")),
90 OPT_STRING('u', "upload-pack", &option_upload_pack, N_("path"),
91 N_("path to git-upload-pack on the remote")),
92 OPT_STRING(0, "depth", &option_depth, N_("depth"),
93 N_("create a shallow clone of that depth")),
94 OPT_BOOL(0, "single-branch", &option_single_branch,
95 N_("clone only one branch, HEAD or --branch")),
96 OPT_STRING(0, "separate-git-dir", &real_git_dir, N_("gitdir"),
97 N_("separate git dir from working tree")),
98 OPT_STRING_LIST('c', "config", &option_config, N_("key=value"),
99 N_("set config inside the new repository")),
100 OPT_END()
103 static const char *argv_submodule[] = {
104 "submodule", "update", "--init", "--recursive", NULL
107 static char *get_repo_path(const char *repo, int *is_bundle)
109 static char *suffix[] = { "/.git", "", ".git/.git", ".git" };
110 static char *bundle_suffix[] = { ".bundle", "" };
111 struct stat st;
112 int i;
114 for (i = 0; i < ARRAY_SIZE(suffix); i++) {
115 const char *path;
116 path = mkpath("%s%s", repo, suffix[i]);
117 if (stat(path, &st))
118 continue;
119 if (S_ISDIR(st.st_mode) && is_git_directory(path)) {
120 *is_bundle = 0;
121 return xstrdup(absolute_path(path));
122 } else if (S_ISREG(st.st_mode) && st.st_size > 8) {
123 /* Is it a "gitfile"? */
124 char signature[8];
125 int len, fd = open(path, O_RDONLY);
126 if (fd < 0)
127 continue;
128 len = read_in_full(fd, signature, 8);
129 close(fd);
130 if (len != 8 || strncmp(signature, "gitdir: ", 8))
131 continue;
132 path = read_gitfile(path);
133 if (path) {
134 *is_bundle = 0;
135 return xstrdup(absolute_path(path));
140 for (i = 0; i < ARRAY_SIZE(bundle_suffix); i++) {
141 const char *path;
142 path = mkpath("%s%s", repo, bundle_suffix[i]);
143 if (!stat(path, &st) && S_ISREG(st.st_mode)) {
144 *is_bundle = 1;
145 return xstrdup(absolute_path(path));
149 return NULL;
152 static char *guess_dir_name(const char *repo, int is_bundle, int is_bare)
154 const char *end = repo + strlen(repo), *start;
155 char *dir;
158 * Strip trailing spaces, slashes and /.git
160 while (repo < end && (is_dir_sep(end[-1]) || isspace(end[-1])))
161 end--;
162 if (end - repo > 5 && is_dir_sep(end[-5]) &&
163 !strncmp(end - 4, ".git", 4)) {
164 end -= 5;
165 while (repo < end && is_dir_sep(end[-1]))
166 end--;
170 * Find last component, but be prepared that repo could have
171 * the form "remote.example.com:foo.git", i.e. no slash
172 * in the directory part.
174 start = end;
175 while (repo < start && !is_dir_sep(start[-1]) && start[-1] != ':')
176 start--;
179 * Strip .{bundle,git}.
181 if (is_bundle) {
182 if (end - start > 7 && !strncmp(end - 7, ".bundle", 7))
183 end -= 7;
184 } else {
185 if (end - start > 4 && !strncmp(end - 4, ".git", 4))
186 end -= 4;
189 if (is_bare) {
190 struct strbuf result = STRBUF_INIT;
191 strbuf_addf(&result, "%.*s.git", (int)(end - start), start);
192 dir = strbuf_detach(&result, NULL);
193 } else
194 dir = xstrndup(start, end - start);
196 * Replace sequences of 'control' characters and whitespace
197 * with one ascii space, remove leading and trailing spaces.
199 if (*dir) {
200 char *out = dir;
201 int prev_space = 1 /* strip leading whitespace */;
202 for (end = dir; *end; ++end) {
203 char ch = *end;
204 if ((unsigned char)ch < '\x20')
205 ch = '\x20';
206 if (isspace(ch)) {
207 if (prev_space)
208 continue;
209 prev_space = 1;
210 } else
211 prev_space = 0;
212 *out++ = ch;
214 *out = '\0';
215 if (out > dir && prev_space)
216 out[-1] = '\0';
218 return dir;
221 static void strip_trailing_slashes(char *dir)
223 char *end = dir + strlen(dir);
225 while (dir < end - 1 && is_dir_sep(end[-1]))
226 end--;
227 *end = '\0';
230 static int add_one_reference(struct string_list_item *item, void *cb_data)
232 char *ref_git;
233 const char *repo;
234 struct strbuf alternate = STRBUF_INIT;
236 /* Beware: read_gitfile(), real_path() and mkpath() return static buffer */
237 ref_git = xstrdup(real_path(item->string));
239 repo = read_gitfile(ref_git);
240 if (!repo)
241 repo = read_gitfile(mkpath("%s/.git", ref_git));
242 if (repo) {
243 free(ref_git);
244 ref_git = xstrdup(repo);
247 if (!repo && is_directory(mkpath("%s/.git/objects", ref_git))) {
248 char *ref_git_git = mkpathdup("%s/.git", ref_git);
249 free(ref_git);
250 ref_git = ref_git_git;
251 } else if (!is_directory(mkpath("%s/objects", ref_git)))
252 die(_("reference repository '%s' is not a local repository."),
253 item->string);
255 if (!access(mkpath("%s/shallow", ref_git), F_OK))
256 die(_("reference repository '%s' is shallow"), item->string);
258 if (!access(mkpath("%s/info/grafts", ref_git), F_OK))
259 die(_("reference repository '%s' is grafted"), item->string);
261 strbuf_addf(&alternate, "%s/objects", ref_git);
262 add_to_alternates_file(alternate.buf);
263 strbuf_release(&alternate);
264 free(ref_git);
265 return 0;
268 static void setup_reference(void)
270 for_each_string_list(&option_reference, add_one_reference, NULL);
273 static void copy_alternates(struct strbuf *src, struct strbuf *dst,
274 const char *src_repo)
277 * Read from the source objects/info/alternates file
278 * and copy the entries to corresponding file in the
279 * destination repository with add_to_alternates_file().
280 * Both src and dst have "$path/objects/info/alternates".
282 * Instead of copying bit-for-bit from the original,
283 * we need to append to existing one so that the already
284 * created entry via "clone -s" is not lost, and also
285 * to turn entries with paths relative to the original
286 * absolute, so that they can be used in the new repository.
288 FILE *in = fopen(src->buf, "r");
289 struct strbuf line = STRBUF_INIT;
291 while (strbuf_getline(&line, in, '\n') != EOF) {
292 char *abs_path, abs_buf[PATH_MAX];
293 if (!line.len || line.buf[0] == '#')
294 continue;
295 if (is_absolute_path(line.buf)) {
296 add_to_alternates_file(line.buf);
297 continue;
299 abs_path = mkpath("%s/objects/%s", src_repo, line.buf);
300 normalize_path_copy(abs_buf, abs_path);
301 add_to_alternates_file(abs_buf);
303 strbuf_release(&line);
304 fclose(in);
307 static void copy_or_link_directory(struct strbuf *src, struct strbuf *dest,
308 const char *src_repo, int src_baselen)
310 struct dirent *de;
311 struct stat buf;
312 int src_len, dest_len;
313 DIR *dir;
315 dir = opendir(src->buf);
316 if (!dir)
317 die_errno(_("failed to open '%s'"), src->buf);
319 if (mkdir(dest->buf, 0777)) {
320 if (errno != EEXIST)
321 die_errno(_("failed to create directory '%s'"), dest->buf);
322 else if (stat(dest->buf, &buf))
323 die_errno(_("failed to stat '%s'"), dest->buf);
324 else if (!S_ISDIR(buf.st_mode))
325 die(_("%s exists and is not a directory"), dest->buf);
328 strbuf_addch(src, '/');
329 src_len = src->len;
330 strbuf_addch(dest, '/');
331 dest_len = dest->len;
333 while ((de = readdir(dir)) != NULL) {
334 strbuf_setlen(src, src_len);
335 strbuf_addstr(src, de->d_name);
336 strbuf_setlen(dest, dest_len);
337 strbuf_addstr(dest, de->d_name);
338 if (stat(src->buf, &buf)) {
339 warning (_("failed to stat %s\n"), src->buf);
340 continue;
342 if (S_ISDIR(buf.st_mode)) {
343 if (de->d_name[0] != '.')
344 copy_or_link_directory(src, dest,
345 src_repo, src_baselen);
346 continue;
349 /* Files that cannot be copied bit-for-bit... */
350 if (!strcmp(src->buf + src_baselen, "/info/alternates")) {
351 copy_alternates(src, dest, src_repo);
352 continue;
355 if (unlink(dest->buf) && errno != ENOENT)
356 die_errno(_("failed to unlink '%s'"), dest->buf);
357 if (!option_no_hardlinks) {
358 if (!link(src->buf, dest->buf))
359 continue;
360 if (option_local > 0)
361 die_errno(_("failed to create link '%s'"), dest->buf);
362 option_no_hardlinks = 1;
364 if (copy_file_with_time(dest->buf, src->buf, 0666))
365 die_errno(_("failed to copy file to '%s'"), dest->buf);
367 closedir(dir);
370 static void clone_local(const char *src_repo, const char *dest_repo)
372 if (option_shared) {
373 struct strbuf alt = STRBUF_INIT;
374 strbuf_addf(&alt, "%s/objects", src_repo);
375 add_to_alternates_file(alt.buf);
376 strbuf_release(&alt);
377 } else {
378 struct strbuf src = STRBUF_INIT;
379 struct strbuf dest = STRBUF_INIT;
380 strbuf_addf(&src, "%s/objects", src_repo);
381 strbuf_addf(&dest, "%s/objects", dest_repo);
382 copy_or_link_directory(&src, &dest, src_repo, src.len);
383 strbuf_release(&src);
384 strbuf_release(&dest);
387 if (0 <= option_verbosity)
388 fprintf(stderr, _("done.\n"));
391 static const char *junk_work_tree;
392 static const char *junk_git_dir;
393 static pid_t junk_pid;
394 static enum {
395 JUNK_LEAVE_NONE,
396 JUNK_LEAVE_REPO,
397 JUNK_LEAVE_ALL
398 } junk_mode = JUNK_LEAVE_NONE;
400 static const char junk_leave_repo_msg[] =
401 N_("Clone succeeded, but checkout failed.\n"
402 "You can inspect what was checked out with 'git status'\n"
403 "and retry the checkout with 'git checkout -f HEAD'\n");
405 static void remove_junk(void)
407 struct strbuf sb = STRBUF_INIT;
409 switch (junk_mode) {
410 case JUNK_LEAVE_REPO:
411 warning("%s", _(junk_leave_repo_msg));
412 /* fall-through */
413 case JUNK_LEAVE_ALL:
414 return;
415 default:
416 /* proceed to removal */
417 break;
420 if (getpid() != junk_pid)
421 return;
422 if (junk_git_dir) {
423 strbuf_addstr(&sb, junk_git_dir);
424 remove_dir_recursively(&sb, 0);
425 strbuf_reset(&sb);
427 if (junk_work_tree) {
428 strbuf_addstr(&sb, junk_work_tree);
429 remove_dir_recursively(&sb, 0);
430 strbuf_reset(&sb);
434 static void remove_junk_on_signal(int signo)
436 remove_junk();
437 sigchain_pop(signo);
438 raise(signo);
441 static struct ref *find_remote_branch(const struct ref *refs, const char *branch)
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);
450 if (ref)
451 return ref;
453 strbuf_addstr(&head, "refs/tags/");
454 strbuf_addstr(&head, branch);
455 ref = find_ref_by_name(refs, head.buf);
456 strbuf_release(&head);
458 return ref;
461 static struct ref *wanted_peer_refs(const struct ref *refs,
462 struct refspec *refspec)
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;
468 if (option_single_branch) {
469 struct ref *remote_head = NULL;
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));
479 if (!remote_head && option_branch)
480 warning(_("Could not find remote branch %s to clone."),
481 option_branch);
482 else {
483 get_fetch_map(remote_head, refspec, &tail, 0);
485 /* if --branch=tag, pull the requested tag explicitly */
486 get_fetch_map(remote_head, tag_refspec, &tail, 0);
488 } else
489 get_fetch_map(refs, refspec, &tail, 0);
491 if (!option_mirror && !option_single_branch)
492 get_fetch_map(refs, tag_refspec, &tail, 0);
494 return local_refs;
497 static void write_remote_refs(const struct ref *local_refs)
499 const struct ref *r;
501 lock_packed_refs(LOCK_DIE_ON_ERROR);
503 for (r = local_refs; r; r = r->next) {
504 if (!r->peer_ref)
505 continue;
506 add_packed_ref(r->peer_ref->name, r->old_sha1);
509 if (commit_packed_refs())
510 die_errno("unable to overwrite old ref-pack file");
513 static void write_followtags(const struct ref *refs, const char *msg)
515 const struct ref *ref;
516 for (ref = refs; ref; ref = ref->next) {
517 if (!starts_with(ref->name, "refs/tags/"))
518 continue;
519 if (ends_with(ref->name, "^{}"))
520 continue;
521 if (!has_sha1_file(ref->old_sha1))
522 continue;
523 update_ref(msg, ref->name, ref->old_sha1,
524 NULL, 0, DIE_ON_ERR);
528 static int iterate_ref_map(void *cb_data, unsigned char sha1[20])
530 struct ref **rm = cb_data;
531 struct ref *ref = *rm;
534 * Skip anything missing a peer_ref, which we are not
535 * actually going to write a ref for.
537 while (ref && !ref->peer_ref)
538 ref = ref->next;
539 /* Returning -1 notes "end of list" to the caller. */
540 if (!ref)
541 return -1;
543 hashcpy(sha1, ref->old_sha1);
544 *rm = ref->next;
545 return 0;
548 static void update_remote_refs(const struct ref *refs,
549 const struct ref *mapped_refs,
550 const struct ref *remote_head_points_at,
551 const char *branch_top,
552 const char *msg,
553 struct transport *transport,
554 int check_connectivity)
556 const struct ref *rm = mapped_refs;
558 if (check_connectivity) {
559 if (transport->progress)
560 fprintf(stderr, _("Checking connectivity... "));
561 if (check_everything_connected_with_transport(iterate_ref_map,
562 0, &rm, transport))
563 die(_("remote did not send all necessary objects"));
564 if (transport->progress)
565 fprintf(stderr, _("done.\n"));
568 if (refs) {
569 write_remote_refs(mapped_refs);
570 if (option_single_branch)
571 write_followtags(refs, msg);
574 if (remote_head_points_at && !option_bare) {
575 struct strbuf head_ref = STRBUF_INIT;
576 strbuf_addstr(&head_ref, branch_top);
577 strbuf_addstr(&head_ref, "HEAD");
578 create_symref(head_ref.buf,
579 remote_head_points_at->peer_ref->name,
580 msg);
584 static void update_head(const struct ref *our, const struct ref *remote,
585 const char *msg)
587 if (our && starts_with(our->name, "refs/heads/")) {
588 /* Local default branch link */
589 create_symref("HEAD", our->name, NULL);
590 if (!option_bare) {
591 const char *head = skip_prefix(our->name, "refs/heads/");
592 update_ref(msg, "HEAD", our->old_sha1, NULL, 0, DIE_ON_ERR);
593 install_branch_config(0, head, option_origin, our->name);
595 } else if (our) {
596 struct commit *c = lookup_commit_reference(our->old_sha1);
597 /* --branch specifies a non-branch (i.e. tags), detach HEAD */
598 update_ref(msg, "HEAD", c->object.sha1,
599 NULL, REF_NODEREF, DIE_ON_ERR);
600 } else if (remote) {
602 * We know remote HEAD points to a non-branch, or
603 * HEAD points to a branch but we don't know which one.
604 * Detach HEAD in all these cases.
606 update_ref(msg, "HEAD", remote->old_sha1,
607 NULL, REF_NODEREF, DIE_ON_ERR);
611 static int checkout(void)
613 unsigned char sha1[20];
614 char *head;
615 struct lock_file *lock_file;
616 struct unpack_trees_options opts;
617 struct tree *tree;
618 struct tree_desc t;
619 int err = 0, fd;
621 if (option_no_checkout)
622 return 0;
624 head = resolve_refdup("HEAD", sha1, 1, NULL);
625 if (!head) {
626 warning(_("remote HEAD refers to nonexistent ref, "
627 "unable to checkout.\n"));
628 return 0;
630 if (!strcmp(head, "HEAD")) {
631 if (advice_detached_head)
632 detach_advice(sha1_to_hex(sha1));
633 } else {
634 if (!starts_with(head, "refs/heads/"))
635 die(_("HEAD not found below refs/heads!"));
637 free(head);
639 /* We need to be in the new work tree for the checkout */
640 setup_work_tree();
642 lock_file = xcalloc(1, sizeof(struct lock_file));
643 fd = hold_locked_index(lock_file, 1);
645 memset(&opts, 0, sizeof opts);
646 opts.update = 1;
647 opts.merge = 1;
648 opts.fn = oneway_merge;
649 opts.verbose_update = (option_verbosity >= 0);
650 opts.src_index = &the_index;
651 opts.dst_index = &the_index;
653 tree = parse_tree_indirect(sha1);
654 parse_tree(tree);
655 init_tree_desc(&t, tree->buffer, tree->size);
656 if (unpack_trees(1, &t, &opts) < 0)
657 die(_("unable to checkout working tree"));
659 if (write_cache(fd, active_cache, active_nr) ||
660 commit_locked_index(lock_file))
661 die(_("unable to write new index file"));
663 err |= run_hook_le(NULL, "post-checkout", sha1_to_hex(null_sha1),
664 sha1_to_hex(sha1), "1", NULL);
666 if (!err && option_recursive)
667 err = run_command_v_opt(argv_submodule, RUN_GIT_CMD);
669 return err;
672 static int write_one_config(const char *key, const char *value, void *data)
674 return git_config_set_multivar(key, value ? value : "true", "^$", 0);
677 static void write_config(struct string_list *config)
679 int i;
681 for (i = 0; i < config->nr; i++) {
682 if (git_config_parse_parameter(config->items[i].string,
683 write_one_config, NULL) < 0)
684 die("unable to write parameters to config file");
688 static void write_refspec_config(const char* src_ref_prefix,
689 const struct ref* our_head_points_at,
690 const struct ref* remote_head_points_at, struct strbuf* branch_top)
692 struct strbuf key = STRBUF_INIT;
693 struct strbuf value = STRBUF_INIT;
695 if (option_mirror || !option_bare) {
696 if (option_single_branch && !option_mirror) {
697 if (option_branch) {
698 if (starts_with(our_head_points_at->name, "refs/tags/"))
699 strbuf_addf(&value, "+%s:%s", our_head_points_at->name,
700 our_head_points_at->name);
701 else
702 strbuf_addf(&value, "+%s:%s%s", our_head_points_at->name,
703 branch_top->buf, option_branch);
704 } else if (remote_head_points_at) {
705 strbuf_addf(&value, "+%s:%s%s", remote_head_points_at->name,
706 branch_top->buf,
707 skip_prefix(remote_head_points_at->name, "refs/heads/"));
710 * otherwise, the next "git fetch" will
711 * simply fetch from HEAD without updating
712 * any remote-tracking branch, which is what
713 * we want.
715 } else {
716 strbuf_addf(&value, "+%s*:%s*", src_ref_prefix, branch_top->buf);
718 /* Configure the remote */
719 if (value.len) {
720 strbuf_addf(&key, "remote.%s.fetch", option_origin);
721 git_config_set_multivar(key.buf, value.buf, "^$", 0);
722 strbuf_reset(&key);
724 if (option_mirror) {
725 strbuf_addf(&key, "remote.%s.mirror", option_origin);
726 git_config_set(key.buf, "true");
727 strbuf_reset(&key);
732 strbuf_release(&key);
733 strbuf_release(&value);
736 int cmd_clone(int argc, const char **argv, const char *prefix)
738 int is_bundle = 0, is_local;
739 struct stat buf;
740 const char *repo_name, *repo, *work_tree, *git_dir;
741 char *path, *dir;
742 int dest_exists;
743 const struct ref *refs, *remote_head;
744 const struct ref *remote_head_points_at;
745 const struct ref *our_head_points_at;
746 struct ref *mapped_refs;
747 const struct ref *ref;
748 struct strbuf key = STRBUF_INIT, value = STRBUF_INIT;
749 struct strbuf branch_top = STRBUF_INIT, reflog_msg = STRBUF_INIT;
750 struct transport *transport = NULL;
751 const char *src_ref_prefix = "refs/heads/";
752 struct remote *remote;
753 int err = 0, complete_refs_before_fetch = 1;
755 struct refspec *refspec;
756 const char *fetch_pattern;
758 junk_pid = getpid();
760 packet_trace_identity("clone");
761 argc = parse_options(argc, argv, prefix, builtin_clone_options,
762 builtin_clone_usage, 0);
764 if (argc > 2)
765 usage_msg_opt(_("Too many arguments."),
766 builtin_clone_usage, builtin_clone_options);
768 if (argc == 0)
769 usage_msg_opt(_("You must specify a repository to clone."),
770 builtin_clone_usage, builtin_clone_options);
772 if (option_single_branch == -1)
773 option_single_branch = option_depth ? 1 : 0;
775 if (option_mirror)
776 option_bare = 1;
778 if (option_bare) {
779 if (option_origin)
780 die(_("--bare and --origin %s options are incompatible."),
781 option_origin);
782 if (real_git_dir)
783 die(_("--bare and --separate-git-dir are incompatible."));
784 option_no_checkout = 1;
787 if (!option_origin)
788 option_origin = "origin";
790 repo_name = argv[0];
792 path = get_repo_path(repo_name, &is_bundle);
793 if (path)
794 repo = xstrdup(absolute_path(repo_name));
795 else if (!strchr(repo_name, ':'))
796 die(_("repository '%s' does not exist"), repo_name);
797 else
798 repo = repo_name;
799 is_local = option_local != 0 && path && !is_bundle;
800 if (is_local) {
801 if (option_depth)
802 warning(_("--depth is ignored in local clones; use file:// instead."));
803 if (!access(mkpath("%s/shallow", path), F_OK)) {
804 if (option_local > 0)
805 warning(_("source repository is shallow, ignoring --local"));
806 is_local = 0;
809 if (option_local > 0 && !is_local)
810 warning(_("--local is ignored"));
812 /* no need to be strict, transport_set_option() will validate it again */
813 if (option_depth && atoi(option_depth) < 1)
814 die(_("depth %s is not a positive number"), option_depth);
816 if (argc == 2)
817 dir = xstrdup(argv[1]);
818 else
819 dir = guess_dir_name(repo_name, is_bundle, option_bare);
820 strip_trailing_slashes(dir);
822 dest_exists = !stat(dir, &buf);
823 if (dest_exists && !is_empty_dir(dir))
824 die(_("destination path '%s' already exists and is not "
825 "an empty directory."), dir);
827 strbuf_addf(&reflog_msg, "clone: from %s", repo);
829 if (option_bare)
830 work_tree = NULL;
831 else {
832 work_tree = getenv("GIT_WORK_TREE");
833 if (work_tree && !stat(work_tree, &buf))
834 die(_("working tree '%s' already exists."), work_tree);
837 if (option_bare || work_tree)
838 git_dir = xstrdup(dir);
839 else {
840 work_tree = dir;
841 git_dir = mkpathdup("%s/.git", dir);
844 if (!option_bare) {
845 junk_work_tree = work_tree;
846 if (safe_create_leading_directories_const(work_tree) < 0)
847 die_errno(_("could not create leading directories of '%s'"),
848 work_tree);
849 if (!dest_exists && mkdir(work_tree, 0777))
850 die_errno(_("could not create work tree dir '%s'."),
851 work_tree);
852 set_git_work_tree(work_tree);
854 junk_git_dir = git_dir;
855 atexit(remove_junk);
856 sigchain_push_common(remove_junk_on_signal);
858 if (safe_create_leading_directories_const(git_dir) < 0)
859 die(_("could not create leading directories of '%s'"), git_dir);
861 set_git_dir_init(git_dir, real_git_dir, 0);
862 if (real_git_dir) {
863 git_dir = real_git_dir;
864 junk_git_dir = real_git_dir;
867 if (0 <= option_verbosity) {
868 if (option_bare)
869 fprintf(stderr, _("Cloning into bare repository '%s'...\n"), dir);
870 else
871 fprintf(stderr, _("Cloning into '%s'...\n"), dir);
873 init_db(option_template, INIT_DB_QUIET);
874 write_config(&option_config);
876 git_config(git_default_config, NULL);
878 if (option_bare) {
879 if (option_mirror)
880 src_ref_prefix = "refs/";
881 strbuf_addstr(&branch_top, src_ref_prefix);
883 git_config_set("core.bare", "true");
884 } else {
885 strbuf_addf(&branch_top, "refs/remotes/%s/", option_origin);
888 strbuf_addf(&value, "+%s*:%s*", src_ref_prefix, branch_top.buf);
889 strbuf_addf(&key, "remote.%s.url", option_origin);
890 git_config_set(key.buf, repo);
891 strbuf_reset(&key);
893 if (option_reference.nr)
894 setup_reference();
896 fetch_pattern = value.buf;
897 refspec = parse_fetch_refspec(1, &fetch_pattern);
899 strbuf_reset(&value);
901 remote = remote_get(option_origin);
902 transport = transport_get(remote, remote->url[0]);
903 transport->cloning = 1;
905 if (!transport->get_refs_list || (!is_local && !transport->fetch))
906 die(_("Don't know how to clone %s"), transport->url);
908 transport_set_option(transport, TRANS_OPT_KEEP, "yes");
910 if (option_depth)
911 transport_set_option(transport, TRANS_OPT_DEPTH,
912 option_depth);
913 if (option_single_branch)
914 transport_set_option(transport, TRANS_OPT_FOLLOWTAGS, "1");
916 transport_set_verbosity(transport, option_verbosity, option_progress);
918 if (option_upload_pack)
919 transport_set_option(transport, TRANS_OPT_UPLOADPACK,
920 option_upload_pack);
922 if (transport->smart_options && !option_depth)
923 transport->smart_options->check_self_contained_and_connected = 1;
925 refs = transport_get_remote_refs(transport);
927 if (refs) {
928 mapped_refs = wanted_peer_refs(refs, refspec);
930 * transport_get_remote_refs() may return refs with null sha-1
931 * in mapped_refs (see struct transport->get_refs_list
932 * comment). In that case we need fetch it early because
933 * remote_head code below relies on it.
935 * for normal clones, transport_get_remote_refs() should
936 * return reliable ref set, we can delay cloning until after
937 * remote HEAD check.
939 for (ref = refs; ref; ref = ref->next)
940 if (is_null_sha1(ref->old_sha1)) {
941 complete_refs_before_fetch = 0;
942 break;
945 if (!is_local && !complete_refs_before_fetch)
946 transport_fetch_refs(transport, mapped_refs);
948 remote_head = find_ref_by_name(refs, "HEAD");
949 remote_head_points_at =
950 guess_remote_head(remote_head, mapped_refs, 0);
952 if (option_branch) {
953 our_head_points_at =
954 find_remote_branch(mapped_refs, option_branch);
956 if (!our_head_points_at)
957 die(_("Remote branch %s not found in upstream %s"),
958 option_branch, option_origin);
960 else
961 our_head_points_at = remote_head_points_at;
963 else {
964 if (option_branch)
965 die(_("Remote branch %s not found in upstream %s"),
966 option_branch, option_origin);
968 warning(_("You appear to have cloned an empty repository."));
969 mapped_refs = NULL;
970 our_head_points_at = NULL;
971 remote_head_points_at = NULL;
972 remote_head = NULL;
973 option_no_checkout = 1;
974 if (!option_bare)
975 install_branch_config(0, "master", option_origin,
976 "refs/heads/master");
979 write_refspec_config(src_ref_prefix, our_head_points_at,
980 remote_head_points_at, &branch_top);
982 if (is_local)
983 clone_local(path, git_dir);
984 else if (refs && complete_refs_before_fetch)
985 transport_fetch_refs(transport, mapped_refs);
987 update_remote_refs(refs, mapped_refs, remote_head_points_at,
988 branch_top.buf, reflog_msg.buf, transport, !is_local);
990 update_head(our_head_points_at, remote_head, reflog_msg.buf);
992 transport_unlock_pack(transport);
993 transport_disconnect(transport);
995 junk_mode = JUNK_LEAVE_REPO;
996 err = checkout();
998 strbuf_release(&reflog_msg);
999 strbuf_release(&branch_top);
1000 strbuf_release(&key);
1001 strbuf_release(&value);
1002 junk_mode = JUNK_LEAVE_ALL;
1003 return err;