t8001/t8002: blame: add tests of -L line numbers less than 1
[git.git] / builtin / clone.c
blob430307b298b4f9ea03ff4caea283b133fde0077e
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_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 const char *repo;
235 struct strbuf alternate = STRBUF_INIT;
237 /* Beware: read_gitfile(), real_path() and mkpath() return static buffer */
238 ref_git = xstrdup(real_path(item->string));
240 repo = read_gitfile(ref_git);
241 if (!repo)
242 repo = read_gitfile(mkpath("%s/.git", ref_git));
243 if (repo) {
244 free(ref_git);
245 ref_git = xstrdup(repo);
248 if (!repo && is_directory(mkpath("%s/.git/objects", ref_git))) {
249 char *ref_git_git = mkpathdup("%s/.git", ref_git);
250 free(ref_git);
251 ref_git = ref_git_git;
252 } else if (!is_directory(mkpath("%s/objects", ref_git)))
253 die(_("reference repository '%s' is not a local repository."),
254 item->string);
256 strbuf_addf(&alternate, "%s/objects", ref_git);
257 add_to_alternates_file(alternate.buf);
258 strbuf_release(&alternate);
259 free(ref_git);
260 return 0;
263 static void setup_reference(void)
265 for_each_string_list(&option_reference, add_one_reference, NULL);
268 static void copy_alternates(struct strbuf *src, struct strbuf *dst,
269 const char *src_repo)
272 * Read from the source objects/info/alternates file
273 * and copy the entries to corresponding file in the
274 * destination repository with add_to_alternates_file().
275 * Both src and dst have "$path/objects/info/alternates".
277 * Instead of copying bit-for-bit from the original,
278 * we need to append to existing one so that the already
279 * created entry via "clone -s" is not lost, and also
280 * to turn entries with paths relative to the original
281 * absolute, so that they can be used in the new repository.
283 FILE *in = fopen(src->buf, "r");
284 struct strbuf line = STRBUF_INIT;
286 while (strbuf_getline(&line, in, '\n') != EOF) {
287 char *abs_path, abs_buf[PATH_MAX];
288 if (!line.len || line.buf[0] == '#')
289 continue;
290 if (is_absolute_path(line.buf)) {
291 add_to_alternates_file(line.buf);
292 continue;
294 abs_path = mkpath("%s/objects/%s", src_repo, line.buf);
295 normalize_path_copy(abs_buf, abs_path);
296 add_to_alternates_file(abs_buf);
298 strbuf_release(&line);
299 fclose(in);
302 static void copy_or_link_directory(struct strbuf *src, struct strbuf *dest,
303 const char *src_repo, int src_baselen)
305 struct dirent *de;
306 struct stat buf;
307 int src_len, dest_len;
308 DIR *dir;
310 dir = opendir(src->buf);
311 if (!dir)
312 die_errno(_("failed to open '%s'"), src->buf);
314 if (mkdir(dest->buf, 0777)) {
315 if (errno != EEXIST)
316 die_errno(_("failed to create directory '%s'"), dest->buf);
317 else if (stat(dest->buf, &buf))
318 die_errno(_("failed to stat '%s'"), dest->buf);
319 else if (!S_ISDIR(buf.st_mode))
320 die(_("%s exists and is not a directory"), dest->buf);
323 strbuf_addch(src, '/');
324 src_len = src->len;
325 strbuf_addch(dest, '/');
326 dest_len = dest->len;
328 while ((de = readdir(dir)) != NULL) {
329 strbuf_setlen(src, src_len);
330 strbuf_addstr(src, de->d_name);
331 strbuf_setlen(dest, dest_len);
332 strbuf_addstr(dest, de->d_name);
333 if (stat(src->buf, &buf)) {
334 warning (_("failed to stat %s\n"), src->buf);
335 continue;
337 if (S_ISDIR(buf.st_mode)) {
338 if (de->d_name[0] != '.')
339 copy_or_link_directory(src, dest,
340 src_repo, src_baselen);
341 continue;
344 /* Files that cannot be copied bit-for-bit... */
345 if (!strcmp(src->buf + src_baselen, "/info/alternates")) {
346 copy_alternates(src, dest, src_repo);
347 continue;
350 if (unlink(dest->buf) && errno != ENOENT)
351 die_errno(_("failed to unlink '%s'"), dest->buf);
352 if (!option_no_hardlinks) {
353 if (!link(src->buf, dest->buf))
354 continue;
355 if (option_local > 0)
356 die_errno(_("failed to create link '%s'"), dest->buf);
357 option_no_hardlinks = 1;
359 if (copy_file_with_time(dest->buf, src->buf, 0666))
360 die_errno(_("failed to copy file to '%s'"), dest->buf);
362 closedir(dir);
365 static void clone_local(const char *src_repo, const char *dest_repo)
367 if (option_shared) {
368 struct strbuf alt = STRBUF_INIT;
369 strbuf_addf(&alt, "%s/objects", src_repo);
370 add_to_alternates_file(alt.buf);
371 strbuf_release(&alt);
372 } else {
373 struct strbuf src = STRBUF_INIT;
374 struct strbuf dest = STRBUF_INIT;
375 strbuf_addf(&src, "%s/objects", src_repo);
376 strbuf_addf(&dest, "%s/objects", dest_repo);
377 copy_or_link_directory(&src, &dest, src_repo, src.len);
378 strbuf_release(&src);
379 strbuf_release(&dest);
382 if (0 <= option_verbosity)
383 printf(_("done.\n"));
386 static const char *junk_work_tree;
387 static const char *junk_git_dir;
388 static pid_t junk_pid;
389 static enum {
390 JUNK_LEAVE_NONE,
391 JUNK_LEAVE_REPO,
392 JUNK_LEAVE_ALL
393 } junk_mode = JUNK_LEAVE_NONE;
395 static const char junk_leave_repo_msg[] =
396 N_("Clone succeeded, but checkout failed.\n"
397 "You can inspect what was checked out with 'git status'\n"
398 "and retry the checkout with 'git checkout -f HEAD'\n");
400 static void remove_junk(void)
402 struct strbuf sb = STRBUF_INIT;
404 switch (junk_mode) {
405 case JUNK_LEAVE_REPO:
406 warning("%s", _(junk_leave_repo_msg));
407 /* fall-through */
408 case JUNK_LEAVE_ALL:
409 return;
410 default:
411 /* proceed to removal */
412 break;
415 if (getpid() != junk_pid)
416 return;
417 if (junk_git_dir) {
418 strbuf_addstr(&sb, junk_git_dir);
419 remove_dir_recursively(&sb, 0);
420 strbuf_reset(&sb);
422 if (junk_work_tree) {
423 strbuf_addstr(&sb, junk_work_tree);
424 remove_dir_recursively(&sb, 0);
425 strbuf_reset(&sb);
429 static void remove_junk_on_signal(int signo)
431 remove_junk();
432 sigchain_pop(signo);
433 raise(signo);
436 static struct ref *find_remote_branch(const struct ref *refs, const char *branch)
438 struct ref *ref;
439 struct strbuf head = STRBUF_INIT;
440 strbuf_addstr(&head, "refs/heads/");
441 strbuf_addstr(&head, branch);
442 ref = find_ref_by_name(refs, head.buf);
443 strbuf_release(&head);
445 if (ref)
446 return ref;
448 strbuf_addstr(&head, "refs/tags/");
449 strbuf_addstr(&head, branch);
450 ref = find_ref_by_name(refs, head.buf);
451 strbuf_release(&head);
453 return ref;
456 static struct ref *wanted_peer_refs(const struct ref *refs,
457 struct refspec *refspec)
459 struct ref *head = copy_ref(find_ref_by_name(refs, "HEAD"));
460 struct ref *local_refs = head;
461 struct ref **tail = head ? &head->next : &local_refs;
463 if (option_single_branch) {
464 struct ref *remote_head = NULL;
466 if (!option_branch)
467 remote_head = guess_remote_head(head, refs, 0);
468 else {
469 local_refs = NULL;
470 tail = &local_refs;
471 remote_head = copy_ref(find_remote_branch(refs, option_branch));
474 if (!remote_head && option_branch)
475 warning(_("Could not find remote branch %s to clone."),
476 option_branch);
477 else {
478 get_fetch_map(remote_head, refspec, &tail, 0);
480 /* if --branch=tag, pull the requested tag explicitly */
481 get_fetch_map(remote_head, tag_refspec, &tail, 0);
483 } else
484 get_fetch_map(refs, refspec, &tail, 0);
486 if (!option_mirror && !option_single_branch)
487 get_fetch_map(refs, tag_refspec, &tail, 0);
489 return local_refs;
492 static void write_remote_refs(const struct ref *local_refs)
494 const struct ref *r;
496 lock_packed_refs(LOCK_DIE_ON_ERROR);
498 for (r = local_refs; r; r = r->next) {
499 if (!r->peer_ref)
500 continue;
501 add_packed_ref(r->peer_ref->name, r->old_sha1);
504 if (commit_packed_refs())
505 die_errno("unable to overwrite old ref-pack file");
508 static void write_followtags(const struct ref *refs, const char *msg)
510 const struct ref *ref;
511 for (ref = refs; ref; ref = ref->next) {
512 if (prefixcmp(ref->name, "refs/tags/"))
513 continue;
514 if (!suffixcmp(ref->name, "^{}"))
515 continue;
516 if (!has_sha1_file(ref->old_sha1))
517 continue;
518 update_ref(msg, ref->name, ref->old_sha1,
519 NULL, 0, DIE_ON_ERR);
523 static int iterate_ref_map(void *cb_data, unsigned char sha1[20])
525 struct ref **rm = cb_data;
526 struct ref *ref = *rm;
529 * Skip anything missing a peer_ref, which we are not
530 * actually going to write a ref for.
532 while (ref && !ref->peer_ref)
533 ref = ref->next;
534 /* Returning -1 notes "end of list" to the caller. */
535 if (!ref)
536 return -1;
538 hashcpy(sha1, ref->old_sha1);
539 *rm = ref->next;
540 return 0;
543 static void update_remote_refs(const struct ref *refs,
544 const struct ref *mapped_refs,
545 const struct ref *remote_head_points_at,
546 const char *branch_top,
547 const char *msg,
548 struct transport *transport,
549 int check_connectivity)
551 const struct ref *rm = mapped_refs;
553 if (check_connectivity) {
554 if (0 <= option_verbosity)
555 printf(_("Checking connectivity... "));
556 if (check_everything_connected_with_transport(iterate_ref_map,
557 0, &rm, transport))
558 die(_("remote did not send all necessary objects"));
559 if (0 <= option_verbosity)
560 printf(_("done\n"));
563 if (refs) {
564 write_remote_refs(mapped_refs);
565 if (option_single_branch)
566 write_followtags(refs, msg);
569 if (remote_head_points_at && !option_bare) {
570 struct strbuf head_ref = STRBUF_INIT;
571 strbuf_addstr(&head_ref, branch_top);
572 strbuf_addstr(&head_ref, "HEAD");
573 create_symref(head_ref.buf,
574 remote_head_points_at->peer_ref->name,
575 msg);
579 static void update_head(const struct ref *our, const struct ref *remote,
580 const char *msg)
582 if (our && !prefixcmp(our->name, "refs/heads/")) {
583 /* Local default branch link */
584 create_symref("HEAD", our->name, NULL);
585 if (!option_bare) {
586 const char *head = skip_prefix(our->name, "refs/heads/");
587 update_ref(msg, "HEAD", our->old_sha1, NULL, 0, DIE_ON_ERR);
588 install_branch_config(0, head, option_origin, our->name);
590 } else if (our) {
591 struct commit *c = lookup_commit_reference(our->old_sha1);
592 /* --branch specifies a non-branch (i.e. tags), detach HEAD */
593 update_ref(msg, "HEAD", c->object.sha1,
594 NULL, REF_NODEREF, DIE_ON_ERR);
595 } else if (remote) {
597 * We know remote HEAD points to a non-branch, or
598 * HEAD points to a branch but we don't know which one.
599 * Detach HEAD in all these cases.
601 update_ref(msg, "HEAD", remote->old_sha1,
602 NULL, REF_NODEREF, DIE_ON_ERR);
606 static int checkout(void)
608 unsigned char sha1[20];
609 char *head;
610 struct lock_file *lock_file;
611 struct unpack_trees_options opts;
612 struct tree *tree;
613 struct tree_desc t;
614 int err = 0, fd;
616 if (option_no_checkout)
617 return 0;
619 head = resolve_refdup("HEAD", sha1, 1, NULL);
620 if (!head) {
621 warning(_("remote HEAD refers to nonexistent ref, "
622 "unable to checkout.\n"));
623 return 0;
625 if (!strcmp(head, "HEAD")) {
626 if (advice_detached_head)
627 detach_advice(sha1_to_hex(sha1));
628 } else {
629 if (prefixcmp(head, "refs/heads/"))
630 die(_("HEAD not found below refs/heads!"));
632 free(head);
634 /* We need to be in the new work tree for the checkout */
635 setup_work_tree();
637 lock_file = xcalloc(1, sizeof(struct lock_file));
638 fd = hold_locked_index(lock_file, 1);
640 memset(&opts, 0, sizeof opts);
641 opts.update = 1;
642 opts.merge = 1;
643 opts.fn = oneway_merge;
644 opts.verbose_update = (option_verbosity >= 0);
645 opts.src_index = &the_index;
646 opts.dst_index = &the_index;
648 tree = parse_tree_indirect(sha1);
649 parse_tree(tree);
650 init_tree_desc(&t, tree->buffer, tree->size);
651 if (unpack_trees(1, &t, &opts) < 0)
652 die(_("unable to checkout working tree"));
654 if (write_cache(fd, active_cache, active_nr) ||
655 commit_locked_index(lock_file))
656 die(_("unable to write new index file"));
658 err |= run_hook(NULL, "post-checkout", sha1_to_hex(null_sha1),
659 sha1_to_hex(sha1), "1", NULL);
661 if (!err && option_recursive)
662 err = run_command_v_opt(argv_submodule, RUN_GIT_CMD);
664 return err;
667 static int write_one_config(const char *key, const char *value, void *data)
669 return git_config_set_multivar(key, value ? value : "true", "^$", 0);
672 static void write_config(struct string_list *config)
674 int i;
676 for (i = 0; i < config->nr; i++) {
677 if (git_config_parse_parameter(config->items[i].string,
678 write_one_config, NULL) < 0)
679 die("unable to write parameters to config file");
683 static void write_refspec_config(const char* src_ref_prefix,
684 const struct ref* our_head_points_at,
685 const struct ref* remote_head_points_at, struct strbuf* branch_top)
687 struct strbuf key = STRBUF_INIT;
688 struct strbuf value = STRBUF_INIT;
690 if (option_mirror || !option_bare) {
691 if (option_single_branch && !option_mirror) {
692 if (option_branch) {
693 if (strstr(our_head_points_at->name, "refs/tags/"))
694 strbuf_addf(&value, "+%s:%s", our_head_points_at->name,
695 our_head_points_at->name);
696 else
697 strbuf_addf(&value, "+%s:%s%s", our_head_points_at->name,
698 branch_top->buf, option_branch);
699 } else if (remote_head_points_at) {
700 strbuf_addf(&value, "+%s:%s%s", remote_head_points_at->name,
701 branch_top->buf,
702 skip_prefix(remote_head_points_at->name, "refs/heads/"));
705 * otherwise, the next "git fetch" will
706 * simply fetch from HEAD without updating
707 * any remote-tracking branch, which is what
708 * we want.
710 } else {
711 strbuf_addf(&value, "+%s*:%s*", src_ref_prefix, branch_top->buf);
713 /* Configure the remote */
714 if (value.len) {
715 strbuf_addf(&key, "remote.%s.fetch", option_origin);
716 git_config_set_multivar(key.buf, value.buf, "^$", 0);
717 strbuf_reset(&key);
719 if (option_mirror) {
720 strbuf_addf(&key, "remote.%s.mirror", option_origin);
721 git_config_set(key.buf, "true");
722 strbuf_reset(&key);
727 strbuf_release(&key);
728 strbuf_release(&value);
731 int cmd_clone(int argc, const char **argv, const char *prefix)
733 int is_bundle = 0, is_local;
734 struct stat buf;
735 const char *repo_name, *repo, *work_tree, *git_dir;
736 char *path, *dir;
737 int dest_exists;
738 const struct ref *refs, *remote_head;
739 const struct ref *remote_head_points_at;
740 const struct ref *our_head_points_at;
741 struct ref *mapped_refs;
742 const struct ref *ref;
743 struct strbuf key = STRBUF_INIT, value = STRBUF_INIT;
744 struct strbuf branch_top = STRBUF_INIT, reflog_msg = STRBUF_INIT;
745 struct transport *transport = NULL;
746 const char *src_ref_prefix = "refs/heads/";
747 struct remote *remote;
748 int err = 0, complete_refs_before_fetch = 1;
750 struct refspec *refspec;
751 const char *fetch_pattern;
753 junk_pid = getpid();
755 packet_trace_identity("clone");
756 argc = parse_options(argc, argv, prefix, builtin_clone_options,
757 builtin_clone_usage, 0);
759 if (argc > 2)
760 usage_msg_opt(_("Too many arguments."),
761 builtin_clone_usage, builtin_clone_options);
763 if (argc == 0)
764 usage_msg_opt(_("You must specify a repository to clone."),
765 builtin_clone_usage, builtin_clone_options);
767 if (option_single_branch == -1)
768 option_single_branch = option_depth ? 1 : 0;
770 if (option_mirror)
771 option_bare = 1;
773 if (option_bare) {
774 if (option_origin)
775 die(_("--bare and --origin %s options are incompatible."),
776 option_origin);
777 if (real_git_dir)
778 die(_("--bare and --separate-git-dir are incompatible."));
779 option_no_checkout = 1;
782 if (!option_origin)
783 option_origin = "origin";
785 repo_name = argv[0];
787 path = get_repo_path(repo_name, &is_bundle);
788 if (path)
789 repo = xstrdup(absolute_path(repo_name));
790 else if (!strchr(repo_name, ':'))
791 die(_("repository '%s' does not exist"), repo_name);
792 else
793 repo = repo_name;
794 is_local = option_local != 0 && path && !is_bundle;
795 if (is_local && option_depth)
796 warning(_("--depth is ignored in local clones; use file:// instead."));
797 if (option_local > 0 && !is_local)
798 warning(_("--local is ignored"));
800 if (argc == 2)
801 dir = xstrdup(argv[1]);
802 else
803 dir = guess_dir_name(repo_name, is_bundle, option_bare);
804 strip_trailing_slashes(dir);
806 dest_exists = !stat(dir, &buf);
807 if (dest_exists && !is_empty_dir(dir))
808 die(_("destination path '%s' already exists and is not "
809 "an empty directory."), dir);
811 strbuf_addf(&reflog_msg, "clone: from %s", repo);
813 if (option_bare)
814 work_tree = NULL;
815 else {
816 work_tree = getenv("GIT_WORK_TREE");
817 if (work_tree && !stat(work_tree, &buf))
818 die(_("working tree '%s' already exists."), work_tree);
821 if (option_bare || work_tree)
822 git_dir = xstrdup(dir);
823 else {
824 work_tree = dir;
825 git_dir = mkpathdup("%s/.git", dir);
828 if (!option_bare) {
829 junk_work_tree = work_tree;
830 if (safe_create_leading_directories_const(work_tree) < 0)
831 die_errno(_("could not create leading directories of '%s'"),
832 work_tree);
833 if (!dest_exists && mkdir(work_tree, 0777))
834 die_errno(_("could not create work tree dir '%s'."),
835 work_tree);
836 set_git_work_tree(work_tree);
838 junk_git_dir = git_dir;
839 atexit(remove_junk);
840 sigchain_push_common(remove_junk_on_signal);
842 if (safe_create_leading_directories_const(git_dir) < 0)
843 die(_("could not create leading directories of '%s'"), git_dir);
845 set_git_dir_init(git_dir, real_git_dir, 0);
846 if (real_git_dir) {
847 git_dir = real_git_dir;
848 junk_git_dir = real_git_dir;
851 if (0 <= option_verbosity) {
852 if (option_bare)
853 printf(_("Cloning into bare repository '%s'...\n"), dir);
854 else
855 printf(_("Cloning into '%s'...\n"), dir);
857 init_db(option_template, INIT_DB_QUIET);
858 write_config(&option_config);
860 git_config(git_default_config, NULL);
862 if (option_bare) {
863 if (option_mirror)
864 src_ref_prefix = "refs/";
865 strbuf_addstr(&branch_top, src_ref_prefix);
867 git_config_set("core.bare", "true");
868 } else {
869 strbuf_addf(&branch_top, "refs/remotes/%s/", option_origin);
872 strbuf_addf(&value, "+%s*:%s*", src_ref_prefix, branch_top.buf);
873 strbuf_addf(&key, "remote.%s.url", option_origin);
874 git_config_set(key.buf, repo);
875 strbuf_reset(&key);
877 if (option_reference.nr)
878 setup_reference();
880 fetch_pattern = value.buf;
881 refspec = parse_fetch_refspec(1, &fetch_pattern);
883 strbuf_reset(&value);
885 remote = remote_get(option_origin);
886 transport = transport_get(remote, remote->url[0]);
888 if (!is_local) {
889 if (!transport->get_refs_list || !transport->fetch)
890 die(_("Don't know how to clone %s"), transport->url);
892 transport_set_option(transport, TRANS_OPT_KEEP, "yes");
894 if (option_depth)
895 transport_set_option(transport, TRANS_OPT_DEPTH,
896 option_depth);
897 if (option_single_branch)
898 transport_set_option(transport, TRANS_OPT_FOLLOWTAGS, "1");
900 transport_set_verbosity(transport, option_verbosity, option_progress);
902 if (option_upload_pack)
903 transport_set_option(transport, TRANS_OPT_UPLOADPACK,
904 option_upload_pack);
906 if (transport->smart_options && !option_depth)
907 transport->smart_options->check_self_contained_and_connected = 1;
910 refs = transport_get_remote_refs(transport);
912 if (refs) {
913 mapped_refs = wanted_peer_refs(refs, refspec);
915 * transport_get_remote_refs() may return refs with null sha-1
916 * in mapped_refs (see struct transport->get_refs_list
917 * comment). In that case we need fetch it early because
918 * remote_head code below relies on it.
920 * for normal clones, transport_get_remote_refs() should
921 * return reliable ref set, we can delay cloning until after
922 * remote HEAD check.
924 for (ref = refs; ref; ref = ref->next)
925 if (is_null_sha1(ref->old_sha1)) {
926 complete_refs_before_fetch = 0;
927 break;
930 if (!is_local && !complete_refs_before_fetch)
931 transport_fetch_refs(transport, mapped_refs);
933 remote_head = find_ref_by_name(refs, "HEAD");
934 remote_head_points_at =
935 guess_remote_head(remote_head, mapped_refs, 0);
937 if (option_branch) {
938 our_head_points_at =
939 find_remote_branch(mapped_refs, option_branch);
941 if (!our_head_points_at)
942 die(_("Remote branch %s not found in upstream %s"),
943 option_branch, option_origin);
945 else
946 our_head_points_at = remote_head_points_at;
948 else {
949 warning(_("You appear to have cloned an empty repository."));
950 mapped_refs = NULL;
951 our_head_points_at = NULL;
952 remote_head_points_at = NULL;
953 remote_head = NULL;
954 option_no_checkout = 1;
955 if (!option_bare)
956 install_branch_config(0, "master", option_origin,
957 "refs/heads/master");
960 write_refspec_config(src_ref_prefix, our_head_points_at,
961 remote_head_points_at, &branch_top);
963 if (is_local)
964 clone_local(path, git_dir);
965 else if (refs && complete_refs_before_fetch)
966 transport_fetch_refs(transport, mapped_refs);
968 update_remote_refs(refs, mapped_refs, remote_head_points_at,
969 branch_top.buf, reflog_msg.buf, transport, !is_local);
971 update_head(our_head_points_at, remote_head, reflog_msg.buf);
973 transport_unlock_pack(transport);
974 transport_disconnect(transport);
976 junk_mode = JUNK_LEAVE_REPO;
977 err = checkout();
979 strbuf_release(&reflog_msg);
980 strbuf_release(&branch_top);
981 strbuf_release(&key);
982 strbuf_release(&value);
983 junk_mode = JUNK_LEAVE_ALL;
984 return err;