t6019: demonstrate --ancestry-path A...B breakage
[git/jrn.git] / builtin / clone.c
blob035ab649504d69a83f87b854582c8003a2dcb905
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 "pack-refs.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 char *option_template, *option_depth;
44 static char *option_origin = NULL;
45 static char *option_branch = NULL;
46 static const char *real_git_dir;
47 static char *option_upload_pack = "git-upload-pack";
48 static int option_verbosity;
49 static int option_progress = -1;
50 static struct string_list option_config;
51 static struct string_list option_reference;
53 static int opt_parse_reference(const struct option *opt, const char *arg, int unset)
55 struct string_list *option_reference = opt->value;
56 if (!arg)
57 return -1;
58 string_list_append(option_reference, arg);
59 return 0;
62 static struct option builtin_clone_options[] = {
63 OPT__VERBOSITY(&option_verbosity),
64 OPT_BOOL(0, "progress", &option_progress,
65 N_("force progress reporting")),
66 OPT_BOOLEAN('n', "no-checkout", &option_no_checkout,
67 N_("don't create a checkout")),
68 OPT_BOOLEAN(0, "bare", &option_bare, N_("create a bare repository")),
69 { OPTION_BOOLEAN, 0, "naked", &option_bare, NULL,
70 N_("create a bare repository"),
71 PARSE_OPT_NOARG | PARSE_OPT_HIDDEN },
72 OPT_BOOLEAN(0, "mirror", &option_mirror,
73 N_("create a mirror repository (implies bare)")),
74 OPT_BOOL('l', "local", &option_local,
75 N_("to clone from a local repository")),
76 OPT_BOOLEAN(0, "no-hardlinks", &option_no_hardlinks,
77 N_("don't use local hardlinks, always copy")),
78 OPT_BOOLEAN('s', "shared", &option_shared,
79 N_("setup as shared repository")),
80 OPT_BOOLEAN(0, "recursive", &option_recursive,
81 N_("initialize submodules in the clone")),
82 OPT_BOOLEAN(0, "recurse-submodules", &option_recursive,
83 N_("initialize submodules in the clone")),
84 OPT_STRING(0, "template", &option_template, N_("template-directory"),
85 N_("directory from which templates will be used")),
86 OPT_CALLBACK(0 , "reference", &option_reference, N_("repo"),
87 N_("reference repository"), &opt_parse_reference),
88 OPT_STRING('o', "origin", &option_origin, N_("name"),
89 N_("use <name> instead of 'origin' to track upstream")),
90 OPT_STRING('b', "branch", &option_branch, N_("branch"),
91 N_("checkout <branch> instead of the remote's HEAD")),
92 OPT_STRING('u', "upload-pack", &option_upload_pack, N_("path"),
93 N_("path to git-upload-pack on the remote")),
94 OPT_STRING(0, "depth", &option_depth, N_("depth"),
95 N_("create a shallow clone of that depth")),
96 OPT_BOOL(0, "single-branch", &option_single_branch,
97 N_("clone only one branch, HEAD or --branch")),
98 OPT_STRING(0, "separate-git-dir", &real_git_dir, N_("gitdir"),
99 N_("separate git dir from working tree")),
100 OPT_STRING_LIST('c', "config", &option_config, N_("key=value"),
101 N_("set config inside the new repository")),
102 OPT_END()
105 static const char *argv_submodule[] = {
106 "submodule", "update", "--init", "--recursive", NULL
109 static char *get_repo_path(const char *repo, int *is_bundle)
111 static char *suffix[] = { "/.git", "", ".git/.git", ".git" };
112 static char *bundle_suffix[] = { ".bundle", "" };
113 struct stat st;
114 int i;
116 for (i = 0; i < ARRAY_SIZE(suffix); i++) {
117 const char *path;
118 path = mkpath("%s%s", repo, suffix[i]);
119 if (stat(path, &st))
120 continue;
121 if (S_ISDIR(st.st_mode) && is_git_directory(path)) {
122 *is_bundle = 0;
123 return xstrdup(absolute_path(path));
124 } else if (S_ISREG(st.st_mode) && st.st_size > 8) {
125 /* Is it a "gitfile"? */
126 char signature[8];
127 int len, fd = open(path, O_RDONLY);
128 if (fd < 0)
129 continue;
130 len = read_in_full(fd, signature, 8);
131 close(fd);
132 if (len != 8 || strncmp(signature, "gitdir: ", 8))
133 continue;
134 path = read_gitfile(path);
135 if (path) {
136 *is_bundle = 0;
137 return xstrdup(absolute_path(path));
142 for (i = 0; i < ARRAY_SIZE(bundle_suffix); i++) {
143 const char *path;
144 path = mkpath("%s%s", repo, bundle_suffix[i]);
145 if (!stat(path, &st) && S_ISREG(st.st_mode)) {
146 *is_bundle = 1;
147 return xstrdup(absolute_path(path));
151 return NULL;
154 static char *guess_dir_name(const char *repo, int is_bundle, int is_bare)
156 const char *end = repo + strlen(repo), *start;
157 char *dir;
160 * Strip trailing spaces, slashes and /.git
162 while (repo < end && (is_dir_sep(end[-1]) || isspace(end[-1])))
163 end--;
164 if (end - repo > 5 && is_dir_sep(end[-5]) &&
165 !strncmp(end - 4, ".git", 4)) {
166 end -= 5;
167 while (repo < end && is_dir_sep(end[-1]))
168 end--;
172 * Find last component, but be prepared that repo could have
173 * the form "remote.example.com:foo.git", i.e. no slash
174 * in the directory part.
176 start = end;
177 while (repo < start && !is_dir_sep(start[-1]) && start[-1] != ':')
178 start--;
181 * Strip .{bundle,git}.
183 if (is_bundle) {
184 if (end - start > 7 && !strncmp(end - 7, ".bundle", 7))
185 end -= 7;
186 } else {
187 if (end - start > 4 && !strncmp(end - 4, ".git", 4))
188 end -= 4;
191 if (is_bare) {
192 struct strbuf result = STRBUF_INIT;
193 strbuf_addf(&result, "%.*s.git", (int)(end - start), start);
194 dir = strbuf_detach(&result, NULL);
195 } else
196 dir = xstrndup(start, end - start);
198 * Replace sequences of 'control' characters and whitespace
199 * with one ascii space, remove leading and trailing spaces.
201 if (*dir) {
202 char *out = dir;
203 int prev_space = 1 /* strip leading whitespace */;
204 for (end = dir; *end; ++end) {
205 char ch = *end;
206 if ((unsigned char)ch < '\x20')
207 ch = '\x20';
208 if (isspace(ch)) {
209 if (prev_space)
210 continue;
211 prev_space = 1;
212 } else
213 prev_space = 0;
214 *out++ = ch;
216 *out = '\0';
217 if (out > dir && prev_space)
218 out[-1] = '\0';
220 return dir;
223 static void strip_trailing_slashes(char *dir)
225 char *end = dir + strlen(dir);
227 while (dir < end - 1 && is_dir_sep(end[-1]))
228 end--;
229 *end = '\0';
232 static int add_one_reference(struct string_list_item *item, void *cb_data)
234 char *ref_git;
235 const char *repo;
236 struct strbuf alternate = STRBUF_INIT;
238 /* Beware: read_gitfile(), real_path() and mkpath() return static buffer */
239 ref_git = xstrdup(real_path(item->string));
241 repo = read_gitfile(ref_git);
242 if (!repo)
243 repo = read_gitfile(mkpath("%s/.git", ref_git));
244 if (repo) {
245 free(ref_git);
246 ref_git = xstrdup(repo);
249 if (!repo && is_directory(mkpath("%s/.git/objects", ref_git))) {
250 char *ref_git_git = mkpathdup("%s/.git", ref_git);
251 free(ref_git);
252 ref_git = ref_git_git;
253 } else if (!is_directory(mkpath("%s/objects", ref_git)))
254 die(_("reference repository '%s' is not a local repository."),
255 item->string);
257 strbuf_addf(&alternate, "%s/objects", ref_git);
258 add_to_alternates_file(alternate.buf);
259 strbuf_release(&alternate);
260 free(ref_git);
261 return 0;
264 static void setup_reference(void)
266 for_each_string_list(&option_reference, add_one_reference, NULL);
269 static void copy_alternates(struct strbuf *src, struct strbuf *dst,
270 const char *src_repo)
273 * Read from the source objects/info/alternates file
274 * and copy the entries to corresponding file in the
275 * destination repository with add_to_alternates_file().
276 * Both src and dst have "$path/objects/info/alternates".
278 * Instead of copying bit-for-bit from the original,
279 * we need to append to existing one so that the already
280 * created entry via "clone -s" is not lost, and also
281 * to turn entries with paths relative to the original
282 * absolute, so that they can be used in the new repository.
284 FILE *in = fopen(src->buf, "r");
285 struct strbuf line = STRBUF_INIT;
287 while (strbuf_getline(&line, in, '\n') != EOF) {
288 char *abs_path, abs_buf[PATH_MAX];
289 if (!line.len || line.buf[0] == '#')
290 continue;
291 if (is_absolute_path(line.buf)) {
292 add_to_alternates_file(line.buf);
293 continue;
295 abs_path = mkpath("%s/objects/%s", src_repo, line.buf);
296 normalize_path_copy(abs_buf, abs_path);
297 add_to_alternates_file(abs_buf);
299 strbuf_release(&line);
300 fclose(in);
303 static void copy_or_link_directory(struct strbuf *src, struct strbuf *dest,
304 const char *src_repo, int src_baselen)
306 struct dirent *de;
307 struct stat buf;
308 int src_len, dest_len;
309 DIR *dir;
311 dir = opendir(src->buf);
312 if (!dir)
313 die_errno(_("failed to open '%s'"), src->buf);
315 if (mkdir(dest->buf, 0777)) {
316 if (errno != EEXIST)
317 die_errno(_("failed to create directory '%s'"), dest->buf);
318 else if (stat(dest->buf, &buf))
319 die_errno(_("failed to stat '%s'"), dest->buf);
320 else if (!S_ISDIR(buf.st_mode))
321 die(_("%s exists and is not a directory"), dest->buf);
324 strbuf_addch(src, '/');
325 src_len = src->len;
326 strbuf_addch(dest, '/');
327 dest_len = dest->len;
329 while ((de = readdir(dir)) != NULL) {
330 strbuf_setlen(src, src_len);
331 strbuf_addstr(src, de->d_name);
332 strbuf_setlen(dest, dest_len);
333 strbuf_addstr(dest, de->d_name);
334 if (stat(src->buf, &buf)) {
335 warning (_("failed to stat %s\n"), src->buf);
336 continue;
338 if (S_ISDIR(buf.st_mode)) {
339 if (de->d_name[0] != '.')
340 copy_or_link_directory(src, dest,
341 src_repo, src_baselen);
342 continue;
345 /* Files that cannot be copied bit-for-bit... */
346 if (!strcmp(src->buf + src_baselen, "/info/alternates")) {
347 copy_alternates(src, dest, src_repo);
348 continue;
351 if (unlink(dest->buf) && errno != ENOENT)
352 die_errno(_("failed to unlink '%s'"), dest->buf);
353 if (!option_no_hardlinks) {
354 if (!link(src->buf, dest->buf))
355 continue;
356 if (option_local > 0)
357 die_errno(_("failed to create link '%s'"), dest->buf);
358 option_no_hardlinks = 1;
360 if (copy_file_with_time(dest->buf, src->buf, 0666))
361 die_errno(_("failed to copy file to '%s'"), dest->buf);
363 closedir(dir);
366 static void clone_local(const char *src_repo, const char *dest_repo)
368 if (option_shared) {
369 struct strbuf alt = STRBUF_INIT;
370 strbuf_addf(&alt, "%s/objects", src_repo);
371 add_to_alternates_file(alt.buf);
372 strbuf_release(&alt);
373 } else {
374 struct strbuf src = STRBUF_INIT;
375 struct strbuf dest = STRBUF_INIT;
376 strbuf_addf(&src, "%s/objects", src_repo);
377 strbuf_addf(&dest, "%s/objects", dest_repo);
378 copy_or_link_directory(&src, &dest, src_repo, src.len);
379 strbuf_release(&src);
380 strbuf_release(&dest);
383 if (0 <= option_verbosity)
384 printf(_("done.\n"));
387 static const char *junk_work_tree;
388 static const char *junk_git_dir;
389 static pid_t junk_pid;
390 static enum {
391 JUNK_LEAVE_NONE,
392 JUNK_LEAVE_REPO,
393 JUNK_LEAVE_ALL
394 } junk_mode = JUNK_LEAVE_NONE;
396 static const char junk_leave_repo_msg[] =
397 N_("Clone succeeded, but checkout failed.\n"
398 "You can inspect what was checked out with 'git status'\n"
399 "and retry the checkout with 'git checkout -f HEAD'\n");
401 static void remove_junk(void)
403 struct strbuf sb = STRBUF_INIT;
405 switch (junk_mode) {
406 case JUNK_LEAVE_REPO:
407 warning("%s", _(junk_leave_repo_msg));
408 /* fall-through */
409 case JUNK_LEAVE_ALL:
410 return;
411 default:
412 /* proceed to removal */
413 break;
416 if (getpid() != junk_pid)
417 return;
418 if (junk_git_dir) {
419 strbuf_addstr(&sb, junk_git_dir);
420 remove_dir_recursively(&sb, 0);
421 strbuf_reset(&sb);
423 if (junk_work_tree) {
424 strbuf_addstr(&sb, junk_work_tree);
425 remove_dir_recursively(&sb, 0);
426 strbuf_reset(&sb);
430 static void remove_junk_on_signal(int signo)
432 remove_junk();
433 sigchain_pop(signo);
434 raise(signo);
437 static struct ref *find_remote_branch(const struct ref *refs, const char *branch)
439 struct ref *ref;
440 struct strbuf head = STRBUF_INIT;
441 strbuf_addstr(&head, "refs/heads/");
442 strbuf_addstr(&head, branch);
443 ref = find_ref_by_name(refs, head.buf);
444 strbuf_release(&head);
446 if (ref)
447 return ref;
449 strbuf_addstr(&head, "refs/tags/");
450 strbuf_addstr(&head, branch);
451 ref = find_ref_by_name(refs, head.buf);
452 strbuf_release(&head);
454 return ref;
457 static struct ref *wanted_peer_refs(const struct ref *refs,
458 struct refspec *refspec)
460 struct ref *head = copy_ref(find_ref_by_name(refs, "HEAD"));
461 struct ref *local_refs = head;
462 struct ref **tail = head ? &head->next : &local_refs;
464 if (option_single_branch) {
465 struct ref *remote_head = NULL;
467 if (!option_branch)
468 remote_head = guess_remote_head(head, refs, 0);
469 else {
470 local_refs = NULL;
471 tail = &local_refs;
472 remote_head = copy_ref(find_remote_branch(refs, option_branch));
475 if (!remote_head && option_branch)
476 warning(_("Could not find remote branch %s to clone."),
477 option_branch);
478 else {
479 get_fetch_map(remote_head, refspec, &tail, 0);
481 /* if --branch=tag, pull the requested tag explicitly */
482 get_fetch_map(remote_head, tag_refspec, &tail, 0);
484 } else
485 get_fetch_map(refs, refspec, &tail, 0);
487 if (!option_mirror && !option_single_branch)
488 get_fetch_map(refs, tag_refspec, &tail, 0);
490 return local_refs;
493 static void write_remote_refs(const struct ref *local_refs)
495 const struct ref *r;
497 for (r = local_refs; r; r = r->next) {
498 if (!r->peer_ref)
499 continue;
500 add_packed_ref(r->peer_ref->name, r->old_sha1);
503 pack_refs(PACK_REFS_ALL);
506 static void write_followtags(const struct ref *refs, const char *msg)
508 const struct ref *ref;
509 for (ref = refs; ref; ref = ref->next) {
510 if (prefixcmp(ref->name, "refs/tags/"))
511 continue;
512 if (!suffixcmp(ref->name, "^{}"))
513 continue;
514 if (!has_sha1_file(ref->old_sha1))
515 continue;
516 update_ref(msg, ref->name, ref->old_sha1,
517 NULL, 0, DIE_ON_ERR);
521 static int iterate_ref_map(void *cb_data, unsigned char sha1[20])
523 struct ref **rm = cb_data;
524 struct ref *ref = *rm;
527 * Skip anything missing a peer_ref, which we are not
528 * actually going to write a ref for.
530 while (ref && !ref->peer_ref)
531 ref = ref->next;
532 /* Returning -1 notes "end of list" to the caller. */
533 if (!ref)
534 return -1;
536 hashcpy(sha1, ref->old_sha1);
537 *rm = ref->next;
538 return 0;
541 static void update_remote_refs(const struct ref *refs,
542 const struct ref *mapped_refs,
543 const struct ref *remote_head_points_at,
544 const char *branch_top,
545 const char *msg)
547 const struct ref *rm = mapped_refs;
549 if (check_everything_connected(iterate_ref_map, 0, &rm))
550 die(_("remote did not send all necessary objects"));
552 if (refs) {
553 write_remote_refs(mapped_refs);
554 if (option_single_branch)
555 write_followtags(refs, msg);
558 if (remote_head_points_at && !option_bare) {
559 struct strbuf head_ref = STRBUF_INIT;
560 strbuf_addstr(&head_ref, branch_top);
561 strbuf_addstr(&head_ref, "HEAD");
562 create_symref(head_ref.buf,
563 remote_head_points_at->peer_ref->name,
564 msg);
568 static void update_head(const struct ref *our, const struct ref *remote,
569 const char *msg)
571 if (our && !prefixcmp(our->name, "refs/heads/")) {
572 /* Local default branch link */
573 create_symref("HEAD", our->name, NULL);
574 if (!option_bare) {
575 const char *head = skip_prefix(our->name, "refs/heads/");
576 update_ref(msg, "HEAD", our->old_sha1, NULL, 0, DIE_ON_ERR);
577 install_branch_config(0, head, option_origin, our->name);
579 } else if (our) {
580 struct commit *c = lookup_commit_reference(our->old_sha1);
581 /* --branch specifies a non-branch (i.e. tags), detach HEAD */
582 update_ref(msg, "HEAD", c->object.sha1,
583 NULL, REF_NODEREF, DIE_ON_ERR);
584 } else if (remote) {
586 * We know remote HEAD points to a non-branch, or
587 * HEAD points to a branch but we don't know which one.
588 * Detach HEAD in all these cases.
590 update_ref(msg, "HEAD", remote->old_sha1,
591 NULL, REF_NODEREF, DIE_ON_ERR);
595 static int checkout(void)
597 unsigned char sha1[20];
598 char *head;
599 struct lock_file *lock_file;
600 struct unpack_trees_options opts;
601 struct tree *tree;
602 struct tree_desc t;
603 int err = 0, fd;
605 if (option_no_checkout)
606 return 0;
608 head = resolve_refdup("HEAD", sha1, 1, NULL);
609 if (!head) {
610 warning(_("remote HEAD refers to nonexistent ref, "
611 "unable to checkout.\n"));
612 return 0;
614 if (!strcmp(head, "HEAD")) {
615 if (advice_detached_head)
616 detach_advice(sha1_to_hex(sha1));
617 } else {
618 if (prefixcmp(head, "refs/heads/"))
619 die(_("HEAD not found below refs/heads!"));
621 free(head);
623 /* We need to be in the new work tree for the checkout */
624 setup_work_tree();
626 lock_file = xcalloc(1, sizeof(struct lock_file));
627 fd = hold_locked_index(lock_file, 1);
629 memset(&opts, 0, sizeof opts);
630 opts.update = 1;
631 opts.merge = 1;
632 opts.fn = oneway_merge;
633 opts.verbose_update = (option_verbosity >= 0);
634 opts.src_index = &the_index;
635 opts.dst_index = &the_index;
637 tree = parse_tree_indirect(sha1);
638 parse_tree(tree);
639 init_tree_desc(&t, tree->buffer, tree->size);
640 if (unpack_trees(1, &t, &opts) < 0)
641 die(_("unable to checkout working tree"));
643 if (write_cache(fd, active_cache, active_nr) ||
644 commit_locked_index(lock_file))
645 die(_("unable to write new index file"));
647 err |= run_hook(NULL, "post-checkout", sha1_to_hex(null_sha1),
648 sha1_to_hex(sha1), "1", NULL);
650 if (!err && option_recursive)
651 err = run_command_v_opt(argv_submodule, RUN_GIT_CMD);
653 return err;
656 static int write_one_config(const char *key, const char *value, void *data)
658 return git_config_set_multivar(key, value ? value : "true", "^$", 0);
661 static void write_config(struct string_list *config)
663 int i;
665 for (i = 0; i < config->nr; i++) {
666 if (git_config_parse_parameter(config->items[i].string,
667 write_one_config, NULL) < 0)
668 die("unable to write parameters to config file");
672 static void write_refspec_config(const char* src_ref_prefix,
673 const struct ref* our_head_points_at,
674 const struct ref* remote_head_points_at, struct strbuf* branch_top)
676 struct strbuf key = STRBUF_INIT;
677 struct strbuf value = STRBUF_INIT;
679 if (option_mirror || !option_bare) {
680 if (option_single_branch && !option_mirror) {
681 if (option_branch) {
682 if (strstr(our_head_points_at->name, "refs/tags/"))
683 strbuf_addf(&value, "+%s:%s", our_head_points_at->name,
684 our_head_points_at->name);
685 else
686 strbuf_addf(&value, "+%s:%s%s", our_head_points_at->name,
687 branch_top->buf, option_branch);
688 } else if (remote_head_points_at) {
689 strbuf_addf(&value, "+%s:%s%s", remote_head_points_at->name,
690 branch_top->buf,
691 skip_prefix(remote_head_points_at->name, "refs/heads/"));
694 * otherwise, the next "git fetch" will
695 * simply fetch from HEAD without updating
696 * any remote tracking branch, which is what
697 * we want.
699 } else {
700 strbuf_addf(&value, "+%s*:%s*", src_ref_prefix, branch_top->buf);
702 /* Configure the remote */
703 if (value.len) {
704 strbuf_addf(&key, "remote.%s.fetch", option_origin);
705 git_config_set_multivar(key.buf, value.buf, "^$", 0);
706 strbuf_reset(&key);
708 if (option_mirror) {
709 strbuf_addf(&key, "remote.%s.mirror", option_origin);
710 git_config_set(key.buf, "true");
711 strbuf_reset(&key);
716 strbuf_release(&key);
717 strbuf_release(&value);
720 int cmd_clone(int argc, const char **argv, const char *prefix)
722 int is_bundle = 0, is_local;
723 struct stat buf;
724 const char *repo_name, *repo, *work_tree, *git_dir;
725 char *path, *dir;
726 int dest_exists;
727 const struct ref *refs, *remote_head;
728 const struct ref *remote_head_points_at;
729 const struct ref *our_head_points_at;
730 struct ref *mapped_refs;
731 const struct ref *ref;
732 struct strbuf key = STRBUF_INIT, value = STRBUF_INIT;
733 struct strbuf branch_top = STRBUF_INIT, reflog_msg = STRBUF_INIT;
734 struct transport *transport = NULL;
735 const char *src_ref_prefix = "refs/heads/";
736 struct remote *remote;
737 int err = 0, complete_refs_before_fetch = 1;
739 struct refspec *refspec;
740 const char *fetch_pattern;
742 junk_pid = getpid();
744 packet_trace_identity("clone");
745 argc = parse_options(argc, argv, prefix, builtin_clone_options,
746 builtin_clone_usage, 0);
748 if (argc > 2)
749 usage_msg_opt(_("Too many arguments."),
750 builtin_clone_usage, builtin_clone_options);
752 if (argc == 0)
753 usage_msg_opt(_("You must specify a repository to clone."),
754 builtin_clone_usage, builtin_clone_options);
756 if (option_single_branch == -1)
757 option_single_branch = option_depth ? 1 : 0;
759 if (option_mirror)
760 option_bare = 1;
762 if (option_bare) {
763 if (option_origin)
764 die(_("--bare and --origin %s options are incompatible."),
765 option_origin);
766 if (real_git_dir)
767 die(_("--bare and --separate-git-dir are incompatible."));
768 option_no_checkout = 1;
771 if (!option_origin)
772 option_origin = "origin";
774 repo_name = argv[0];
776 path = get_repo_path(repo_name, &is_bundle);
777 if (path)
778 repo = xstrdup(absolute_path(repo_name));
779 else if (!strchr(repo_name, ':'))
780 die(_("repository '%s' does not exist"), repo_name);
781 else
782 repo = repo_name;
783 is_local = option_local != 0 && path && !is_bundle;
784 if (is_local && option_depth)
785 warning(_("--depth is ignored in local clones; use file:// instead."));
787 if (argc == 2)
788 dir = xstrdup(argv[1]);
789 else
790 dir = guess_dir_name(repo_name, is_bundle, option_bare);
791 strip_trailing_slashes(dir);
793 dest_exists = !stat(dir, &buf);
794 if (dest_exists && !is_empty_dir(dir))
795 die(_("destination path '%s' already exists and is not "
796 "an empty directory."), dir);
798 strbuf_addf(&reflog_msg, "clone: from %s", repo);
800 if (option_bare)
801 work_tree = NULL;
802 else {
803 work_tree = getenv("GIT_WORK_TREE");
804 if (work_tree && !stat(work_tree, &buf))
805 die(_("working tree '%s' already exists."), work_tree);
808 if (option_bare || work_tree)
809 git_dir = xstrdup(dir);
810 else {
811 work_tree = dir;
812 git_dir = mkpathdup("%s/.git", dir);
815 if (!option_bare) {
816 junk_work_tree = work_tree;
817 if (safe_create_leading_directories_const(work_tree) < 0)
818 die_errno(_("could not create leading directories of '%s'"),
819 work_tree);
820 if (!dest_exists && mkdir(work_tree, 0777))
821 die_errno(_("could not create work tree dir '%s'."),
822 work_tree);
823 set_git_work_tree(work_tree);
825 junk_git_dir = git_dir;
826 atexit(remove_junk);
827 sigchain_push_common(remove_junk_on_signal);
829 if (safe_create_leading_directories_const(git_dir) < 0)
830 die(_("could not create leading directories of '%s'"), git_dir);
832 set_git_dir_init(git_dir, real_git_dir, 0);
833 if (real_git_dir) {
834 git_dir = real_git_dir;
835 junk_git_dir = real_git_dir;
838 if (0 <= option_verbosity) {
839 if (option_bare)
840 printf(_("Cloning into bare repository '%s'...\n"), dir);
841 else
842 printf(_("Cloning into '%s'...\n"), dir);
844 init_db(option_template, INIT_DB_QUIET);
845 write_config(&option_config);
847 git_config(git_default_config, NULL);
849 if (option_bare) {
850 if (option_mirror)
851 src_ref_prefix = "refs/";
852 strbuf_addstr(&branch_top, src_ref_prefix);
854 git_config_set("core.bare", "true");
855 } else {
856 strbuf_addf(&branch_top, "refs/remotes/%s/", option_origin);
859 strbuf_addf(&value, "+%s*:%s*", src_ref_prefix, branch_top.buf);
860 strbuf_addf(&key, "remote.%s.url", option_origin);
861 git_config_set(key.buf, repo);
862 strbuf_reset(&key);
864 if (option_reference.nr)
865 setup_reference();
867 fetch_pattern = value.buf;
868 refspec = parse_fetch_refspec(1, &fetch_pattern);
870 strbuf_reset(&value);
872 remote = remote_get(option_origin);
873 transport = transport_get(remote, remote->url[0]);
875 if (!is_local) {
876 if (!transport->get_refs_list || !transport->fetch)
877 die(_("Don't know how to clone %s"), transport->url);
879 transport_set_option(transport, TRANS_OPT_KEEP, "yes");
881 if (option_depth)
882 transport_set_option(transport, TRANS_OPT_DEPTH,
883 option_depth);
884 if (option_single_branch)
885 transport_set_option(transport, TRANS_OPT_FOLLOWTAGS, "1");
887 transport_set_verbosity(transport, option_verbosity, option_progress);
889 if (option_upload_pack)
890 transport_set_option(transport, TRANS_OPT_UPLOADPACK,
891 option_upload_pack);
894 refs = transport_get_remote_refs(transport);
896 if (refs) {
897 mapped_refs = wanted_peer_refs(refs, refspec);
899 * transport_get_remote_refs() may return refs with null sha-1
900 * in mapped_refs (see struct transport->get_refs_list
901 * comment). In that case we need fetch it early because
902 * remote_head code below relies on it.
904 * for normal clones, transport_get_remote_refs() should
905 * return reliable ref set, we can delay cloning until after
906 * remote HEAD check.
908 for (ref = refs; ref; ref = ref->next)
909 if (is_null_sha1(ref->old_sha1)) {
910 complete_refs_before_fetch = 0;
911 break;
914 if (!is_local && !complete_refs_before_fetch)
915 transport_fetch_refs(transport, mapped_refs);
917 remote_head = find_ref_by_name(refs, "HEAD");
918 remote_head_points_at =
919 guess_remote_head(remote_head, mapped_refs, 0);
921 if (option_branch) {
922 our_head_points_at =
923 find_remote_branch(mapped_refs, option_branch);
925 if (!our_head_points_at)
926 die(_("Remote branch %s not found in upstream %s"),
927 option_branch, option_origin);
929 else
930 our_head_points_at = remote_head_points_at;
932 else {
933 warning(_("You appear to have cloned an empty repository."));
934 mapped_refs = NULL;
935 our_head_points_at = NULL;
936 remote_head_points_at = NULL;
937 remote_head = NULL;
938 option_no_checkout = 1;
939 if (!option_bare)
940 install_branch_config(0, "master", option_origin,
941 "refs/heads/master");
944 write_refspec_config(src_ref_prefix, our_head_points_at,
945 remote_head_points_at, &branch_top);
947 if (is_local)
948 clone_local(path, git_dir);
949 else if (refs && complete_refs_before_fetch)
950 transport_fetch_refs(transport, mapped_refs);
952 update_remote_refs(refs, mapped_refs, remote_head_points_at,
953 branch_top.buf, reflog_msg.buf);
955 update_head(our_head_points_at, remote_head, reflog_msg.buf);
957 transport_unlock_pack(transport);
958 transport_disconnect(transport);
960 junk_mode = JUNK_LEAVE_REPO;
961 err = checkout();
963 strbuf_release(&reflog_msg);
964 strbuf_release(&branch_top);
965 strbuf_release(&key);
966 strbuf_release(&value);
967 junk_mode = JUNK_LEAVE_ALL;
968 return err;