msvc: test-svn-fe: Fix linker "unresolved external" error
[git/jrn.git] / builtin / clone.c
blobe0aaf13583376c7adf49f504cc9e7e1303fb4a4d
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"
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_BOOLEAN('n', "no-checkout", &option_no_checkout,
66 N_("don't create a checkout")),
67 OPT_BOOLEAN(0, "bare", &option_bare, N_("create a bare repository")),
68 { OPTION_BOOLEAN, 0, "naked", &option_bare, NULL,
69 N_("create a bare repository"),
70 PARSE_OPT_NOARG | PARSE_OPT_HIDDEN },
71 OPT_BOOLEAN(0, "mirror", &option_mirror,
72 N_("create a mirror repository (implies bare)")),
73 OPT_BOOL('l', "local", &option_local,
74 N_("to clone from a local repository")),
75 OPT_BOOLEAN(0, "no-hardlinks", &option_no_hardlinks,
76 N_("don't use local hardlinks, always copy")),
77 OPT_BOOLEAN('s', "shared", &option_shared,
78 N_("setup as shared repository")),
79 OPT_BOOLEAN(0, "recursive", &option_recursive,
80 N_("initialize submodules in the clone")),
81 OPT_BOOLEAN(0, "recurse-submodules", &option_recursive,
82 N_("initialize submodules in the clone")),
83 OPT_STRING(0, "template", &option_template, N_("template-directory"),
84 N_("directory from which templates will be used")),
85 OPT_CALLBACK(0 , "reference", &option_reference, N_("repo"),
86 N_("reference repository"), &opt_parse_reference),
87 OPT_STRING('o', "origin", &option_origin, N_("name"),
88 N_("use <name> instead of 'origin' to track upstream")),
89 OPT_STRING('b', "branch", &option_branch, N_("branch"),
90 N_("checkout <branch> instead of the remote's HEAD")),
91 OPT_STRING('u', "upload-pack", &option_upload_pack, N_("path"),
92 N_("path to git-upload-pack on the remote")),
93 OPT_STRING(0, "depth", &option_depth, N_("depth"),
94 N_("create a shallow clone of that depth")),
95 OPT_BOOL(0, "single-branch", &option_single_branch,
96 N_("clone only one branch, HEAD or --branch")),
97 OPT_STRING(0, "separate-git-dir", &real_git_dir, N_("gitdir"),
98 N_("separate git dir from working tree")),
99 OPT_STRING_LIST('c', "config", &option_config, N_("key=value"),
100 N_("set config inside the new repository")),
101 OPT_END()
104 static const char *argv_submodule[] = {
105 "submodule", "update", "--init", "--recursive", NULL
108 static char *get_repo_path(const char *repo, int *is_bundle)
110 static char *suffix[] = { "/.git", "", ".git/.git", ".git" };
111 static char *bundle_suffix[] = { ".bundle", "" };
112 struct stat st;
113 int i;
115 for (i = 0; i < ARRAY_SIZE(suffix); i++) {
116 const char *path;
117 path = mkpath("%s%s", repo, suffix[i]);
118 if (stat(path, &st))
119 continue;
120 if (S_ISDIR(st.st_mode) && is_git_directory(path)) {
121 *is_bundle = 0;
122 return xstrdup(absolute_path(path));
123 } else if (S_ISREG(st.st_mode) && st.st_size > 8) {
124 /* Is it a "gitfile"? */
125 char signature[8];
126 int len, fd = open(path, O_RDONLY);
127 if (fd < 0)
128 continue;
129 len = read_in_full(fd, signature, 8);
130 close(fd);
131 if (len != 8 || strncmp(signature, "gitdir: ", 8))
132 continue;
133 path = read_gitfile(path);
134 if (path) {
135 *is_bundle = 0;
136 return xstrdup(absolute_path(path));
141 for (i = 0; i < ARRAY_SIZE(bundle_suffix); i++) {
142 const char *path;
143 path = mkpath("%s%s", repo, bundle_suffix[i]);
144 if (!stat(path, &st) && S_ISREG(st.st_mode)) {
145 *is_bundle = 1;
146 return xstrdup(absolute_path(path));
150 return NULL;
153 static char *guess_dir_name(const char *repo, int is_bundle, int is_bare)
155 const char *end = repo + strlen(repo), *start;
156 char *dir;
159 * Strip trailing spaces, slashes and /.git
161 while (repo < end && (is_dir_sep(end[-1]) || isspace(end[-1])))
162 end--;
163 if (end - repo > 5 && is_dir_sep(end[-5]) &&
164 !strncmp(end - 4, ".git", 4)) {
165 end -= 5;
166 while (repo < end && is_dir_sep(end[-1]))
167 end--;
171 * Find last component, but be prepared that repo could have
172 * the form "remote.example.com:foo.git", i.e. no slash
173 * in the directory part.
175 start = end;
176 while (repo < start && !is_dir_sep(start[-1]) && start[-1] != ':')
177 start--;
180 * Strip .{bundle,git}.
182 if (is_bundle) {
183 if (end - start > 7 && !strncmp(end - 7, ".bundle", 7))
184 end -= 7;
185 } else {
186 if (end - start > 4 && !strncmp(end - 4, ".git", 4))
187 end -= 4;
190 if (is_bare) {
191 struct strbuf result = STRBUF_INIT;
192 strbuf_addf(&result, "%.*s.git", (int)(end - start), start);
193 dir = strbuf_detach(&result, NULL);
194 } else
195 dir = xstrndup(start, end - start);
197 * Replace sequences of 'control' characters and whitespace
198 * with one ascii space, remove leading and trailing spaces.
200 if (*dir) {
201 char *out = dir;
202 int prev_space = 1 /* strip leading whitespace */;
203 for (end = dir; *end; ++end) {
204 char ch = *end;
205 if ((unsigned char)ch < '\x20')
206 ch = '\x20';
207 if (isspace(ch)) {
208 if (prev_space)
209 continue;
210 prev_space = 1;
211 } else
212 prev_space = 0;
213 *out++ = ch;
215 *out = '\0';
216 if (out > dir && prev_space)
217 out[-1] = '\0';
219 return dir;
222 static void strip_trailing_slashes(char *dir)
224 char *end = dir + strlen(dir);
226 while (dir < end - 1 && is_dir_sep(end[-1]))
227 end--;
228 *end = '\0';
231 static int add_one_reference(struct string_list_item *item, void *cb_data)
233 char *ref_git;
234 struct strbuf alternate = STRBUF_INIT;
236 /* Beware: real_path() and mkpath() return static buffer */
237 ref_git = xstrdup(real_path(item->string));
238 if (is_directory(mkpath("%s/.git/objects", ref_git))) {
239 char *ref_git_git = mkpathdup("%s/.git", ref_git);
240 free(ref_git);
241 ref_git = ref_git_git;
242 } else if (!is_directory(mkpath("%s/objects", ref_git)))
243 die(_("reference repository '%s' is not a local directory."),
244 item->string);
246 strbuf_addf(&alternate, "%s/objects", ref_git);
247 add_to_alternates_file(alternate.buf);
248 strbuf_release(&alternate);
249 free(ref_git);
250 return 0;
253 static void setup_reference(void)
255 for_each_string_list(&option_reference, add_one_reference, NULL);
258 static void copy_alternates(struct strbuf *src, struct strbuf *dst,
259 const char *src_repo)
262 * Read from the source objects/info/alternates file
263 * and copy the entries to corresponding file in the
264 * destination repository with add_to_alternates_file().
265 * Both src and dst have "$path/objects/info/alternates".
267 * Instead of copying bit-for-bit from the original,
268 * we need to append to existing one so that the already
269 * created entry via "clone -s" is not lost, and also
270 * to turn entries with paths relative to the original
271 * absolute, so that they can be used in the new repository.
273 FILE *in = fopen(src->buf, "r");
274 struct strbuf line = STRBUF_INIT;
276 while (strbuf_getline(&line, in, '\n') != EOF) {
277 char *abs_path, abs_buf[PATH_MAX];
278 if (!line.len || line.buf[0] == '#')
279 continue;
280 if (is_absolute_path(line.buf)) {
281 add_to_alternates_file(line.buf);
282 continue;
284 abs_path = mkpath("%s/objects/%s", src_repo, line.buf);
285 normalize_path_copy(abs_buf, abs_path);
286 add_to_alternates_file(abs_buf);
288 strbuf_release(&line);
289 fclose(in);
292 static void copy_or_link_directory(struct strbuf *src, struct strbuf *dest,
293 const char *src_repo, int src_baselen)
295 struct dirent *de;
296 struct stat buf;
297 int src_len, dest_len;
298 DIR *dir;
300 dir = opendir(src->buf);
301 if (!dir)
302 die_errno(_("failed to open '%s'"), src->buf);
304 if (mkdir(dest->buf, 0777)) {
305 if (errno != EEXIST)
306 die_errno(_("failed to create directory '%s'"), dest->buf);
307 else if (stat(dest->buf, &buf))
308 die_errno(_("failed to stat '%s'"), dest->buf);
309 else if (!S_ISDIR(buf.st_mode))
310 die(_("%s exists and is not a directory"), dest->buf);
313 strbuf_addch(src, '/');
314 src_len = src->len;
315 strbuf_addch(dest, '/');
316 dest_len = dest->len;
318 while ((de = readdir(dir)) != NULL) {
319 strbuf_setlen(src, src_len);
320 strbuf_addstr(src, de->d_name);
321 strbuf_setlen(dest, dest_len);
322 strbuf_addstr(dest, de->d_name);
323 if (stat(src->buf, &buf)) {
324 warning (_("failed to stat %s\n"), src->buf);
325 continue;
327 if (S_ISDIR(buf.st_mode)) {
328 if (de->d_name[0] != '.')
329 copy_or_link_directory(src, dest,
330 src_repo, src_baselen);
331 continue;
334 /* Files that cannot be copied bit-for-bit... */
335 if (!strcmp(src->buf + src_baselen, "/info/alternates")) {
336 copy_alternates(src, dest, src_repo);
337 continue;
340 if (unlink(dest->buf) && errno != ENOENT)
341 die_errno(_("failed to unlink '%s'"), dest->buf);
342 if (!option_no_hardlinks) {
343 if (!link(src->buf, dest->buf))
344 continue;
345 if (option_local > 0)
346 die_errno(_("failed to create link '%s'"), dest->buf);
347 option_no_hardlinks = 1;
349 if (copy_file_with_time(dest->buf, src->buf, 0666))
350 die_errno(_("failed to copy file to '%s'"), dest->buf);
352 closedir(dir);
355 static void clone_local(const char *src_repo, const char *dest_repo)
357 if (option_shared) {
358 struct strbuf alt = STRBUF_INIT;
359 strbuf_addf(&alt, "%s/objects", src_repo);
360 add_to_alternates_file(alt.buf);
361 strbuf_release(&alt);
362 } else {
363 struct strbuf src = STRBUF_INIT;
364 struct strbuf dest = STRBUF_INIT;
365 strbuf_addf(&src, "%s/objects", src_repo);
366 strbuf_addf(&dest, "%s/objects", dest_repo);
367 copy_or_link_directory(&src, &dest, src_repo, src.len);
368 strbuf_release(&src);
369 strbuf_release(&dest);
372 if (0 <= option_verbosity)
373 printf(_("done.\n"));
376 static const char *junk_work_tree;
377 static const char *junk_git_dir;
378 static pid_t junk_pid;
380 static void remove_junk(void)
382 struct strbuf sb = STRBUF_INIT;
383 if (getpid() != junk_pid)
384 return;
385 if (junk_git_dir) {
386 strbuf_addstr(&sb, junk_git_dir);
387 remove_dir_recursively(&sb, 0);
388 strbuf_reset(&sb);
390 if (junk_work_tree) {
391 strbuf_addstr(&sb, junk_work_tree);
392 remove_dir_recursively(&sb, 0);
393 strbuf_reset(&sb);
397 static void remove_junk_on_signal(int signo)
399 remove_junk();
400 sigchain_pop(signo);
401 raise(signo);
404 static struct ref *find_remote_branch(const struct ref *refs, const char *branch)
406 struct ref *ref;
407 struct strbuf head = STRBUF_INIT;
408 strbuf_addstr(&head, "refs/heads/");
409 strbuf_addstr(&head, branch);
410 ref = find_ref_by_name(refs, head.buf);
411 strbuf_release(&head);
413 if (ref)
414 return ref;
416 strbuf_addstr(&head, "refs/tags/");
417 strbuf_addstr(&head, branch);
418 ref = find_ref_by_name(refs, head.buf);
419 strbuf_release(&head);
421 return ref;
424 static struct ref *wanted_peer_refs(const struct ref *refs,
425 struct refspec *refspec)
427 struct ref *head = copy_ref(find_ref_by_name(refs, "HEAD"));
428 struct ref *local_refs = head;
429 struct ref **tail = head ? &head->next : &local_refs;
431 if (option_single_branch) {
432 struct ref *remote_head = NULL;
434 if (!option_branch)
435 remote_head = guess_remote_head(head, refs, 0);
436 else {
437 local_refs = NULL;
438 tail = &local_refs;
439 remote_head = copy_ref(find_remote_branch(refs, option_branch));
442 if (!remote_head && option_branch)
443 warning(_("Could not find remote branch %s to clone."),
444 option_branch);
445 else {
446 get_fetch_map(remote_head, refspec, &tail, 0);
448 /* if --branch=tag, pull the requested tag explicitly */
449 get_fetch_map(remote_head, tag_refspec, &tail, 0);
451 } else
452 get_fetch_map(refs, refspec, &tail, 0);
454 if (!option_mirror && !option_single_branch)
455 get_fetch_map(refs, tag_refspec, &tail, 0);
457 return local_refs;
460 static void write_remote_refs(const struct ref *local_refs)
462 const struct ref *r;
464 for (r = local_refs; r; r = r->next) {
465 if (!r->peer_ref)
466 continue;
467 add_packed_ref(r->peer_ref->name, r->old_sha1);
470 pack_refs(PACK_REFS_ALL);
473 static void write_followtags(const struct ref *refs, const char *msg)
475 const struct ref *ref;
476 for (ref = refs; ref; ref = ref->next) {
477 if (prefixcmp(ref->name, "refs/tags/"))
478 continue;
479 if (!suffixcmp(ref->name, "^{}"))
480 continue;
481 if (!has_sha1_file(ref->old_sha1))
482 continue;
483 update_ref(msg, ref->name, ref->old_sha1,
484 NULL, 0, DIE_ON_ERR);
488 static void update_remote_refs(const struct ref *refs,
489 const struct ref *mapped_refs,
490 const struct ref *remote_head_points_at,
491 const char *branch_top,
492 const char *msg)
494 if (refs) {
495 write_remote_refs(mapped_refs);
496 if (option_single_branch)
497 write_followtags(refs, msg);
500 if (remote_head_points_at && !option_bare) {
501 struct strbuf head_ref = STRBUF_INIT;
502 strbuf_addstr(&head_ref, branch_top);
503 strbuf_addstr(&head_ref, "HEAD");
504 create_symref(head_ref.buf,
505 remote_head_points_at->peer_ref->name,
506 msg);
510 static void update_head(const struct ref *our, const struct ref *remote,
511 const char *msg)
513 if (our && !prefixcmp(our->name, "refs/heads/")) {
514 /* Local default branch link */
515 create_symref("HEAD", our->name, NULL);
516 if (!option_bare) {
517 const char *head = skip_prefix(our->name, "refs/heads/");
518 update_ref(msg, "HEAD", our->old_sha1, NULL, 0, DIE_ON_ERR);
519 install_branch_config(0, head, option_origin, our->name);
521 } else if (our) {
522 struct commit *c = lookup_commit_reference(our->old_sha1);
523 /* --branch specifies a non-branch (i.e. tags), detach HEAD */
524 update_ref(msg, "HEAD", c->object.sha1,
525 NULL, REF_NODEREF, DIE_ON_ERR);
526 } else if (remote) {
528 * We know remote HEAD points to a non-branch, or
529 * HEAD points to a branch but we don't know which one.
530 * Detach HEAD in all these cases.
532 update_ref(msg, "HEAD", remote->old_sha1,
533 NULL, REF_NODEREF, DIE_ON_ERR);
537 static int checkout(void)
539 unsigned char sha1[20];
540 char *head;
541 struct lock_file *lock_file;
542 struct unpack_trees_options opts;
543 struct tree *tree;
544 struct tree_desc t;
545 int err = 0, fd;
547 if (option_no_checkout)
548 return 0;
550 head = resolve_refdup("HEAD", sha1, 1, NULL);
551 if (!head) {
552 warning(_("remote HEAD refers to nonexistent ref, "
553 "unable to checkout.\n"));
554 return 0;
556 if (!strcmp(head, "HEAD")) {
557 if (advice_detached_head)
558 detach_advice(sha1_to_hex(sha1));
559 } else {
560 if (prefixcmp(head, "refs/heads/"))
561 die(_("HEAD not found below refs/heads!"));
563 free(head);
565 /* We need to be in the new work tree for the checkout */
566 setup_work_tree();
568 lock_file = xcalloc(1, sizeof(struct lock_file));
569 fd = hold_locked_index(lock_file, 1);
571 memset(&opts, 0, sizeof opts);
572 opts.update = 1;
573 opts.merge = 1;
574 opts.fn = oneway_merge;
575 opts.verbose_update = (option_verbosity >= 0);
576 opts.src_index = &the_index;
577 opts.dst_index = &the_index;
579 tree = parse_tree_indirect(sha1);
580 parse_tree(tree);
581 init_tree_desc(&t, tree->buffer, tree->size);
582 unpack_trees(1, &t, &opts);
584 if (write_cache(fd, active_cache, active_nr) ||
585 commit_locked_index(lock_file))
586 die(_("unable to write new index file"));
588 err |= run_hook(NULL, "post-checkout", sha1_to_hex(null_sha1),
589 sha1_to_hex(sha1), "1", NULL);
591 if (!err && option_recursive)
592 err = run_command_v_opt(argv_submodule, RUN_GIT_CMD);
594 return err;
597 static int write_one_config(const char *key, const char *value, void *data)
599 return git_config_set_multivar(key, value ? value : "true", "^$", 0);
602 static void write_config(struct string_list *config)
604 int i;
606 for (i = 0; i < config->nr; i++) {
607 if (git_config_parse_parameter(config->items[i].string,
608 write_one_config, NULL) < 0)
609 die("unable to write parameters to config file");
613 static void write_refspec_config(const char* src_ref_prefix,
614 const struct ref* our_head_points_at,
615 const struct ref* remote_head_points_at, struct strbuf* branch_top)
617 struct strbuf key = STRBUF_INIT;
618 struct strbuf value = STRBUF_INIT;
620 if (option_mirror || !option_bare) {
621 if (option_single_branch && !option_mirror) {
622 if (option_branch) {
623 if (strstr(our_head_points_at->name, "refs/tags/"))
624 strbuf_addf(&value, "+%s:%s", our_head_points_at->name,
625 our_head_points_at->name);
626 else
627 strbuf_addf(&value, "+%s:%s%s", our_head_points_at->name,
628 branch_top->buf, option_branch);
629 } else if (remote_head_points_at) {
630 strbuf_addf(&value, "+%s:%s%s", remote_head_points_at->name,
631 branch_top->buf,
632 skip_prefix(remote_head_points_at->name, "refs/heads/"));
635 * otherwise, the next "git fetch" will
636 * simply fetch from HEAD without updating
637 * any remote tracking branch, which is what
638 * we want.
640 } else {
641 strbuf_addf(&value, "+%s*:%s*", src_ref_prefix, branch_top->buf);
643 /* Configure the remote */
644 if (value.len) {
645 strbuf_addf(&key, "remote.%s.fetch", option_origin);
646 git_config_set_multivar(key.buf, value.buf, "^$", 0);
647 strbuf_reset(&key);
649 if (option_mirror) {
650 strbuf_addf(&key, "remote.%s.mirror", option_origin);
651 git_config_set(key.buf, "true");
652 strbuf_reset(&key);
657 strbuf_release(&key);
658 strbuf_release(&value);
661 int cmd_clone(int argc, const char **argv, const char *prefix)
663 int is_bundle = 0, is_local;
664 struct stat buf;
665 const char *repo_name, *repo, *work_tree, *git_dir;
666 char *path, *dir;
667 int dest_exists;
668 const struct ref *refs, *remote_head;
669 const struct ref *remote_head_points_at;
670 const struct ref *our_head_points_at;
671 struct ref *mapped_refs;
672 const struct ref *ref;
673 struct strbuf key = STRBUF_INIT, value = STRBUF_INIT;
674 struct strbuf branch_top = STRBUF_INIT, reflog_msg = STRBUF_INIT;
675 struct transport *transport = NULL;
676 const char *src_ref_prefix = "refs/heads/";
677 struct remote *remote;
678 int err = 0, complete_refs_before_fetch = 1;
680 struct refspec *refspec;
681 const char *fetch_pattern;
683 junk_pid = getpid();
685 packet_trace_identity("clone");
686 argc = parse_options(argc, argv, prefix, builtin_clone_options,
687 builtin_clone_usage, 0);
689 if (argc > 2)
690 usage_msg_opt(_("Too many arguments."),
691 builtin_clone_usage, builtin_clone_options);
693 if (argc == 0)
694 usage_msg_opt(_("You must specify a repository to clone."),
695 builtin_clone_usage, builtin_clone_options);
697 if (option_single_branch == -1)
698 option_single_branch = option_depth ? 1 : 0;
700 if (option_mirror)
701 option_bare = 1;
703 if (option_bare) {
704 if (option_origin)
705 die(_("--bare and --origin %s options are incompatible."),
706 option_origin);
707 if (real_git_dir)
708 die(_("--bare and --separate-git-dir are incompatible."));
709 option_no_checkout = 1;
712 if (!option_origin)
713 option_origin = "origin";
715 repo_name = argv[0];
717 path = get_repo_path(repo_name, &is_bundle);
718 if (path)
719 repo = xstrdup(absolute_path(repo_name));
720 else if (!strchr(repo_name, ':'))
721 die(_("repository '%s' does not exist"), repo_name);
722 else
723 repo = repo_name;
724 is_local = option_local != 0 && path && !is_bundle;
725 if (is_local && option_depth)
726 warning(_("--depth is ignored in local clones; use file:// instead."));
728 if (argc == 2)
729 dir = xstrdup(argv[1]);
730 else
731 dir = guess_dir_name(repo_name, is_bundle, option_bare);
732 strip_trailing_slashes(dir);
734 dest_exists = !stat(dir, &buf);
735 if (dest_exists && !is_empty_dir(dir))
736 die(_("destination path '%s' already exists and is not "
737 "an empty directory."), dir);
739 strbuf_addf(&reflog_msg, "clone: from %s", repo);
741 if (option_bare)
742 work_tree = NULL;
743 else {
744 work_tree = getenv("GIT_WORK_TREE");
745 if (work_tree && !stat(work_tree, &buf))
746 die(_("working tree '%s' already exists."), work_tree);
749 if (option_bare || work_tree)
750 git_dir = xstrdup(dir);
751 else {
752 work_tree = dir;
753 git_dir = mkpathdup("%s/.git", dir);
756 if (!option_bare) {
757 junk_work_tree = work_tree;
758 if (safe_create_leading_directories_const(work_tree) < 0)
759 die_errno(_("could not create leading directories of '%s'"),
760 work_tree);
761 if (!dest_exists && mkdir(work_tree, 0777))
762 die_errno(_("could not create work tree dir '%s'."),
763 work_tree);
764 set_git_work_tree(work_tree);
766 junk_git_dir = git_dir;
767 atexit(remove_junk);
768 sigchain_push_common(remove_junk_on_signal);
770 if (safe_create_leading_directories_const(git_dir) < 0)
771 die(_("could not create leading directories of '%s'"), git_dir);
773 set_git_dir_init(git_dir, real_git_dir, 0);
774 if (real_git_dir) {
775 git_dir = real_git_dir;
776 junk_git_dir = real_git_dir;
779 if (0 <= option_verbosity) {
780 if (option_bare)
781 printf(_("Cloning into bare repository '%s'...\n"), dir);
782 else
783 printf(_("Cloning into '%s'...\n"), dir);
785 init_db(option_template, INIT_DB_QUIET);
786 write_config(&option_config);
788 git_config(git_default_config, NULL);
790 if (option_bare) {
791 if (option_mirror)
792 src_ref_prefix = "refs/";
793 strbuf_addstr(&branch_top, src_ref_prefix);
795 git_config_set("core.bare", "true");
796 } else {
797 strbuf_addf(&branch_top, "refs/remotes/%s/", option_origin);
800 strbuf_addf(&value, "+%s*:%s*", src_ref_prefix, branch_top.buf);
801 strbuf_addf(&key, "remote.%s.url", option_origin);
802 git_config_set(key.buf, repo);
803 strbuf_reset(&key);
805 if (option_reference.nr)
806 setup_reference();
808 fetch_pattern = value.buf;
809 refspec = parse_fetch_refspec(1, &fetch_pattern);
811 strbuf_reset(&value);
813 remote = remote_get(option_origin);
814 transport = transport_get(remote, remote->url[0]);
816 if (!is_local) {
817 if (!transport->get_refs_list || !transport->fetch)
818 die(_("Don't know how to clone %s"), transport->url);
820 transport_set_option(transport, TRANS_OPT_KEEP, "yes");
822 if (option_depth)
823 transport_set_option(transport, TRANS_OPT_DEPTH,
824 option_depth);
825 if (option_single_branch)
826 transport_set_option(transport, TRANS_OPT_FOLLOWTAGS, "1");
828 transport_set_verbosity(transport, option_verbosity, option_progress);
830 if (option_upload_pack)
831 transport_set_option(transport, TRANS_OPT_UPLOADPACK,
832 option_upload_pack);
835 refs = transport_get_remote_refs(transport);
837 if (refs) {
838 mapped_refs = wanted_peer_refs(refs, refspec);
840 * transport_get_remote_refs() may return refs with null sha-1
841 * in mapped_refs (see struct transport->get_refs_list
842 * comment). In that case we need fetch it early because
843 * remote_head code below relies on it.
845 * for normal clones, transport_get_remote_refs() should
846 * return reliable ref set, we can delay cloning until after
847 * remote HEAD check.
849 for (ref = refs; ref; ref = ref->next)
850 if (is_null_sha1(ref->old_sha1)) {
851 complete_refs_before_fetch = 0;
852 break;
855 if (!is_local && !complete_refs_before_fetch)
856 transport_fetch_refs(transport, mapped_refs);
858 remote_head = find_ref_by_name(refs, "HEAD");
859 remote_head_points_at =
860 guess_remote_head(remote_head, mapped_refs, 0);
862 if (option_branch) {
863 our_head_points_at =
864 find_remote_branch(mapped_refs, option_branch);
866 if (!our_head_points_at)
867 die(_("Remote branch %s not found in upstream %s"),
868 option_branch, option_origin);
870 else
871 our_head_points_at = remote_head_points_at;
873 else {
874 warning(_("You appear to have cloned an empty repository."));
875 mapped_refs = NULL;
876 our_head_points_at = NULL;
877 remote_head_points_at = NULL;
878 remote_head = NULL;
879 option_no_checkout = 1;
880 if (!option_bare)
881 install_branch_config(0, "master", option_origin,
882 "refs/heads/master");
885 write_refspec_config(src_ref_prefix, our_head_points_at,
886 remote_head_points_at, &branch_top);
888 if (is_local)
889 clone_local(path, git_dir);
890 else if (refs && complete_refs_before_fetch)
891 transport_fetch_refs(transport, mapped_refs);
893 update_remote_refs(refs, mapped_refs, remote_head_points_at,
894 branch_top.buf, reflog_msg.buf);
896 update_head(our_head_points_at, remote_head, reflog_msg.buf);
898 transport_unlock_pack(transport);
899 transport_disconnect(transport);
901 err = checkout();
903 strbuf_release(&reflog_msg);
904 strbuf_release(&branch_top);
905 strbuf_release(&key);
906 strbuf_release(&value);
907 junk_pid = 0;
908 return err;