Merge branch 'ep/http-configure-ssl-version'
[alt-git.git] / builtin / clone.c
blob578da85254418a620d3c7c847af8eed6a3a29d58
1 /*
2 * Builtin "git clone"
4 * Copyright (c) 2007 Kristian Høgsberg <krh@redhat.com>,
5 * 2008 Daniel Barkalow <barkalow@iabervon.org>
6 * Based on git-commit.sh by Junio C Hamano and Linus Torvalds
8 * Clone a repository into a different directory that does not yet exist.
9 */
11 #include "builtin.h"
12 #include "lockfile.h"
13 #include "parse-options.h"
14 #include "fetch-pack.h"
15 #include "refs.h"
16 #include "tree.h"
17 #include "tree-walk.h"
18 #include "unpack-trees.h"
19 #include "transport.h"
20 #include "strbuf.h"
21 #include "dir.h"
22 #include "sigchain.h"
23 #include "branch.h"
24 #include "remote.h"
25 #include "run-command.h"
26 #include "connected.h"
29 * Overall FIXMEs:
30 * - respect DB_ENVIRONMENT for .git/objects.
32 * Implementation notes:
33 * - dropping use-separate-remote and no-separate-remote compatibility
36 static const char * const builtin_clone_usage[] = {
37 N_("git clone [<options>] [--] <repo> [<dir>]"),
38 NULL
41 static int option_no_checkout, option_bare, option_mirror, option_single_branch = -1;
42 static int option_local = -1, option_no_hardlinks, option_shared, option_recursive;
43 static 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;
52 static int option_dissociate;
54 static struct option builtin_clone_options[] = {
55 OPT__VERBOSITY(&option_verbosity),
56 OPT_BOOL(0, "progress", &option_progress,
57 N_("force progress reporting")),
58 OPT_BOOL('n', "no-checkout", &option_no_checkout,
59 N_("don't create a checkout")),
60 OPT_BOOL(0, "bare", &option_bare, N_("create a bare repository")),
61 OPT_HIDDEN_BOOL(0, "naked", &option_bare,
62 N_("create a bare repository")),
63 OPT_BOOL(0, "mirror", &option_mirror,
64 N_("create a mirror repository (implies bare)")),
65 OPT_BOOL('l', "local", &option_local,
66 N_("to clone from a local repository")),
67 OPT_BOOL(0, "no-hardlinks", &option_no_hardlinks,
68 N_("don't use local hardlinks, always copy")),
69 OPT_BOOL('s', "shared", &option_shared,
70 N_("setup as shared repository")),
71 OPT_BOOL(0, "recursive", &option_recursive,
72 N_("initialize submodules in the clone")),
73 OPT_BOOL(0, "recurse-submodules", &option_recursive,
74 N_("initialize submodules in the clone")),
75 OPT_STRING(0, "template", &option_template, N_("template-directory"),
76 N_("directory from which templates will be used")),
77 OPT_STRING_LIST(0, "reference", &option_reference, N_("repo"),
78 N_("reference repository")),
79 OPT_BOOL(0, "dissociate", &option_dissociate,
80 N_("use --reference only while cloning")),
81 OPT_STRING('o', "origin", &option_origin, N_("name"),
82 N_("use <name> instead of 'origin' to track upstream")),
83 OPT_STRING('b', "branch", &option_branch, N_("branch"),
84 N_("checkout <branch> instead of the remote's HEAD")),
85 OPT_STRING('u', "upload-pack", &option_upload_pack, N_("path"),
86 N_("path to git-upload-pack on the remote")),
87 OPT_STRING(0, "depth", &option_depth, N_("depth"),
88 N_("create a shallow clone of that depth")),
89 OPT_BOOL(0, "single-branch", &option_single_branch,
90 N_("clone only one branch, HEAD or --branch")),
91 OPT_STRING(0, "separate-git-dir", &real_git_dir, N_("gitdir"),
92 N_("separate git dir from working tree")),
93 OPT_STRING_LIST('c', "config", &option_config, N_("key=value"),
94 N_("set config inside the new repository")),
95 OPT_END()
98 static const char *argv_submodule[] = {
99 "submodule", "update", "--init", "--recursive", NULL
102 static const char *get_repo_path_1(struct strbuf *path, int *is_bundle)
104 static char *suffix[] = { "/.git", "", ".git/.git", ".git" };
105 static char *bundle_suffix[] = { ".bundle", "" };
106 size_t baselen = path->len;
107 struct stat st;
108 int i;
110 for (i = 0; i < ARRAY_SIZE(suffix); i++) {
111 strbuf_setlen(path, baselen);
112 strbuf_addstr(path, suffix[i]);
113 if (stat(path->buf, &st))
114 continue;
115 if (S_ISDIR(st.st_mode) && is_git_directory(path->buf)) {
116 *is_bundle = 0;
117 return path->buf;
118 } else if (S_ISREG(st.st_mode) && st.st_size > 8) {
119 /* Is it a "gitfile"? */
120 char signature[8];
121 const char *dst;
122 int len, fd = open(path->buf, O_RDONLY);
123 if (fd < 0)
124 continue;
125 len = read_in_full(fd, signature, 8);
126 close(fd);
127 if (len != 8 || strncmp(signature, "gitdir: ", 8))
128 continue;
129 dst = read_gitfile(path->buf);
130 if (dst) {
131 *is_bundle = 0;
132 return dst;
137 for (i = 0; i < ARRAY_SIZE(bundle_suffix); i++) {
138 strbuf_setlen(path, baselen);
139 strbuf_addstr(path, bundle_suffix[i]);
140 if (!stat(path->buf, &st) && S_ISREG(st.st_mode)) {
141 *is_bundle = 1;
142 return path->buf;
146 return NULL;
149 static char *get_repo_path(const char *repo, int *is_bundle)
151 struct strbuf path = STRBUF_INIT;
152 const char *raw;
153 char *canon;
155 strbuf_addstr(&path, repo);
156 raw = get_repo_path_1(&path, is_bundle);
157 canon = raw ? xstrdup(absolute_path(raw)) : NULL;
158 strbuf_release(&path);
159 return canon;
162 static char *guess_dir_name(const char *repo, int is_bundle, int is_bare)
164 const char *end = repo + strlen(repo), *start, *ptr;
165 size_t len;
166 char *dir;
169 * Skip scheme.
171 start = strstr(repo, "://");
172 if (start == NULL)
173 start = repo;
174 else
175 start += 3;
178 * Skip authentication data. The stripping does happen
179 * greedily, such that we strip up to the last '@' inside
180 * the host part.
182 for (ptr = start; ptr < end && !is_dir_sep(*ptr); ptr++) {
183 if (*ptr == '@')
184 start = ptr + 1;
188 * Strip trailing spaces, slashes and /.git
190 while (start < end && (is_dir_sep(end[-1]) || isspace(end[-1])))
191 end--;
192 if (end - start > 5 && is_dir_sep(end[-5]) &&
193 !strncmp(end - 4, ".git", 4)) {
194 end -= 5;
195 while (start < end && is_dir_sep(end[-1]))
196 end--;
200 * Strip trailing port number if we've got only a
201 * hostname (that is, there is no dir separator but a
202 * colon). This check is required such that we do not
203 * strip URI's like '/foo/bar:2222.git', which should
204 * result in a dir '2222' being guessed due to backwards
205 * compatibility.
207 if (memchr(start, '/', end - start) == NULL
208 && memchr(start, ':', end - start) != NULL) {
209 ptr = end;
210 while (start < ptr && isdigit(ptr[-1]) && ptr[-1] != ':')
211 ptr--;
212 if (start < ptr && ptr[-1] == ':')
213 end = ptr - 1;
217 * Find last component. To remain backwards compatible we
218 * also regard colons as path separators, such that
219 * cloning a repository 'foo:bar.git' would result in a
220 * directory 'bar' being guessed.
222 ptr = end;
223 while (start < ptr && !is_dir_sep(ptr[-1]) && ptr[-1] != ':')
224 ptr--;
225 start = ptr;
228 * Strip .{bundle,git}.
230 len = end - start;
231 strip_suffix_mem(start, &len, is_bundle ? ".bundle" : ".git");
233 if (!len || (len == 1 && *start == '/'))
234 die("No directory name could be guessed.\n"
235 "Please specify a directory on the command line");
237 if (is_bare)
238 dir = xstrfmt("%.*s.git", (int)len, start);
239 else
240 dir = xstrndup(start, len);
242 * Replace sequences of 'control' characters and whitespace
243 * with one ascii space, remove leading and trailing spaces.
245 if (*dir) {
246 char *out = dir;
247 int prev_space = 1 /* strip leading whitespace */;
248 for (end = dir; *end; ++end) {
249 char ch = *end;
250 if ((unsigned char)ch < '\x20')
251 ch = '\x20';
252 if (isspace(ch)) {
253 if (prev_space)
254 continue;
255 prev_space = 1;
256 } else
257 prev_space = 0;
258 *out++ = ch;
260 *out = '\0';
261 if (out > dir && prev_space)
262 out[-1] = '\0';
264 return dir;
267 static void strip_trailing_slashes(char *dir)
269 char *end = dir + strlen(dir);
271 while (dir < end - 1 && is_dir_sep(end[-1]))
272 end--;
273 *end = '\0';
276 static int add_one_reference(struct string_list_item *item, void *cb_data)
278 char *ref_git;
279 const char *repo;
280 struct strbuf alternate = STRBUF_INIT;
282 /* Beware: read_gitfile(), real_path() and mkpath() return static buffer */
283 ref_git = xstrdup(real_path(item->string));
285 repo = read_gitfile(ref_git);
286 if (!repo)
287 repo = read_gitfile(mkpath("%s/.git", ref_git));
288 if (repo) {
289 free(ref_git);
290 ref_git = xstrdup(repo);
293 if (!repo && is_directory(mkpath("%s/.git/objects", ref_git))) {
294 char *ref_git_git = mkpathdup("%s/.git", ref_git);
295 free(ref_git);
296 ref_git = ref_git_git;
297 } else if (!is_directory(mkpath("%s/objects", ref_git)))
298 die(_("reference repository '%s' is not a local repository."),
299 item->string);
301 if (!access(mkpath("%s/shallow", ref_git), F_OK))
302 die(_("reference repository '%s' is shallow"), item->string);
304 if (!access(mkpath("%s/info/grafts", ref_git), F_OK))
305 die(_("reference repository '%s' is grafted"), item->string);
307 strbuf_addf(&alternate, "%s/objects", ref_git);
308 add_to_alternates_file(alternate.buf);
309 strbuf_release(&alternate);
310 free(ref_git);
311 return 0;
314 static void setup_reference(void)
316 for_each_string_list(&option_reference, add_one_reference, NULL);
319 static void copy_alternates(struct strbuf *src, struct strbuf *dst,
320 const char *src_repo)
323 * Read from the source objects/info/alternates file
324 * and copy the entries to corresponding file in the
325 * destination repository with add_to_alternates_file().
326 * Both src and dst have "$path/objects/info/alternates".
328 * Instead of copying bit-for-bit from the original,
329 * we need to append to existing one so that the already
330 * created entry via "clone -s" is not lost, and also
331 * to turn entries with paths relative to the original
332 * absolute, so that they can be used in the new repository.
334 FILE *in = fopen(src->buf, "r");
335 struct strbuf line = STRBUF_INIT;
337 while (strbuf_getline(&line, in, '\n') != EOF) {
338 char *abs_path;
339 if (!line.len || line.buf[0] == '#')
340 continue;
341 if (is_absolute_path(line.buf)) {
342 add_to_alternates_file(line.buf);
343 continue;
345 abs_path = mkpathdup("%s/objects/%s", src_repo, line.buf);
346 normalize_path_copy(abs_path, abs_path);
347 add_to_alternates_file(abs_path);
348 free(abs_path);
350 strbuf_release(&line);
351 fclose(in);
354 static void copy_or_link_directory(struct strbuf *src, struct strbuf *dest,
355 const char *src_repo, int src_baselen)
357 struct dirent *de;
358 struct stat buf;
359 int src_len, dest_len;
360 DIR *dir;
362 dir = opendir(src->buf);
363 if (!dir)
364 die_errno(_("failed to open '%s'"), src->buf);
366 if (mkdir(dest->buf, 0777)) {
367 if (errno != EEXIST)
368 die_errno(_("failed to create directory '%s'"), dest->buf);
369 else if (stat(dest->buf, &buf))
370 die_errno(_("failed to stat '%s'"), dest->buf);
371 else if (!S_ISDIR(buf.st_mode))
372 die(_("%s exists and is not a directory"), dest->buf);
375 strbuf_addch(src, '/');
376 src_len = src->len;
377 strbuf_addch(dest, '/');
378 dest_len = dest->len;
380 while ((de = readdir(dir)) != NULL) {
381 strbuf_setlen(src, src_len);
382 strbuf_addstr(src, de->d_name);
383 strbuf_setlen(dest, dest_len);
384 strbuf_addstr(dest, de->d_name);
385 if (stat(src->buf, &buf)) {
386 warning (_("failed to stat %s\n"), src->buf);
387 continue;
389 if (S_ISDIR(buf.st_mode)) {
390 if (de->d_name[0] != '.')
391 copy_or_link_directory(src, dest,
392 src_repo, src_baselen);
393 continue;
396 /* Files that cannot be copied bit-for-bit... */
397 if (!strcmp(src->buf + src_baselen, "/info/alternates")) {
398 copy_alternates(src, dest, src_repo);
399 continue;
402 if (unlink(dest->buf) && errno != ENOENT)
403 die_errno(_("failed to unlink '%s'"), dest->buf);
404 if (!option_no_hardlinks) {
405 if (!link(src->buf, dest->buf))
406 continue;
407 if (option_local > 0)
408 die_errno(_("failed to create link '%s'"), dest->buf);
409 option_no_hardlinks = 1;
411 if (copy_file_with_time(dest->buf, src->buf, 0666))
412 die_errno(_("failed to copy file to '%s'"), dest->buf);
414 closedir(dir);
417 static void clone_local(const char *src_repo, const char *dest_repo)
419 if (option_shared) {
420 struct strbuf alt = STRBUF_INIT;
421 strbuf_addf(&alt, "%s/objects", src_repo);
422 add_to_alternates_file(alt.buf);
423 strbuf_release(&alt);
424 } else {
425 struct strbuf src = STRBUF_INIT;
426 struct strbuf dest = STRBUF_INIT;
427 strbuf_addf(&src, "%s/objects", src_repo);
428 strbuf_addf(&dest, "%s/objects", dest_repo);
429 copy_or_link_directory(&src, &dest, src_repo, src.len);
430 strbuf_release(&src);
431 strbuf_release(&dest);
434 if (0 <= option_verbosity)
435 fprintf(stderr, _("done.\n"));
438 static const char *junk_work_tree;
439 static const char *junk_git_dir;
440 static enum {
441 JUNK_LEAVE_NONE,
442 JUNK_LEAVE_REPO,
443 JUNK_LEAVE_ALL
444 } junk_mode = JUNK_LEAVE_NONE;
446 static const char junk_leave_repo_msg[] =
447 N_("Clone succeeded, but checkout failed.\n"
448 "You can inspect what was checked out with 'git status'\n"
449 "and retry the checkout with 'git checkout -f HEAD'\n");
451 static void remove_junk(void)
453 struct strbuf sb = STRBUF_INIT;
455 switch (junk_mode) {
456 case JUNK_LEAVE_REPO:
457 warning("%s", _(junk_leave_repo_msg));
458 /* fall-through */
459 case JUNK_LEAVE_ALL:
460 return;
461 default:
462 /* proceed to removal */
463 break;
466 if (junk_git_dir) {
467 strbuf_addstr(&sb, junk_git_dir);
468 remove_dir_recursively(&sb, 0);
469 strbuf_reset(&sb);
471 if (junk_work_tree) {
472 strbuf_addstr(&sb, junk_work_tree);
473 remove_dir_recursively(&sb, 0);
474 strbuf_reset(&sb);
478 static void remove_junk_on_signal(int signo)
480 remove_junk();
481 sigchain_pop(signo);
482 raise(signo);
485 static struct ref *find_remote_branch(const struct ref *refs, const char *branch)
487 struct ref *ref;
488 struct strbuf head = STRBUF_INIT;
489 strbuf_addstr(&head, "refs/heads/");
490 strbuf_addstr(&head, branch);
491 ref = find_ref_by_name(refs, head.buf);
492 strbuf_release(&head);
494 if (ref)
495 return ref;
497 strbuf_addstr(&head, "refs/tags/");
498 strbuf_addstr(&head, branch);
499 ref = find_ref_by_name(refs, head.buf);
500 strbuf_release(&head);
502 return ref;
505 static struct ref *wanted_peer_refs(const struct ref *refs,
506 struct refspec *refspec)
508 struct ref *head = copy_ref(find_ref_by_name(refs, "HEAD"));
509 struct ref *local_refs = head;
510 struct ref **tail = head ? &head->next : &local_refs;
512 if (option_single_branch) {
513 struct ref *remote_head = NULL;
515 if (!option_branch)
516 remote_head = guess_remote_head(head, refs, 0);
517 else {
518 local_refs = NULL;
519 tail = &local_refs;
520 remote_head = copy_ref(find_remote_branch(refs, option_branch));
523 if (!remote_head && option_branch)
524 warning(_("Could not find remote branch %s to clone."),
525 option_branch);
526 else {
527 get_fetch_map(remote_head, refspec, &tail, 0);
529 /* if --branch=tag, pull the requested tag explicitly */
530 get_fetch_map(remote_head, tag_refspec, &tail, 0);
532 } else
533 get_fetch_map(refs, refspec, &tail, 0);
535 if (!option_mirror && !option_single_branch)
536 get_fetch_map(refs, tag_refspec, &tail, 0);
538 return local_refs;
541 static void write_remote_refs(const struct ref *local_refs)
543 const struct ref *r;
545 struct ref_transaction *t;
546 struct strbuf err = STRBUF_INIT;
548 t = ref_transaction_begin(&err);
549 if (!t)
550 die("%s", err.buf);
552 for (r = local_refs; r; r = r->next) {
553 if (!r->peer_ref)
554 continue;
555 if (ref_transaction_create(t, r->peer_ref->name, r->old_sha1,
556 0, NULL, &err))
557 die("%s", err.buf);
560 if (initial_ref_transaction_commit(t, &err))
561 die("%s", err.buf);
563 strbuf_release(&err);
564 ref_transaction_free(t);
567 static void write_followtags(const struct ref *refs, const char *msg)
569 const struct ref *ref;
570 for (ref = refs; ref; ref = ref->next) {
571 if (!starts_with(ref->name, "refs/tags/"))
572 continue;
573 if (ends_with(ref->name, "^{}"))
574 continue;
575 if (!has_sha1_file(ref->old_sha1))
576 continue;
577 update_ref(msg, ref->name, ref->old_sha1,
578 NULL, 0, UPDATE_REFS_DIE_ON_ERR);
582 static int iterate_ref_map(void *cb_data, unsigned char sha1[20])
584 struct ref **rm = cb_data;
585 struct ref *ref = *rm;
588 * Skip anything missing a peer_ref, which we are not
589 * actually going to write a ref for.
591 while (ref && !ref->peer_ref)
592 ref = ref->next;
593 /* Returning -1 notes "end of list" to the caller. */
594 if (!ref)
595 return -1;
597 hashcpy(sha1, ref->old_sha1);
598 *rm = ref->next;
599 return 0;
602 static void update_remote_refs(const struct ref *refs,
603 const struct ref *mapped_refs,
604 const struct ref *remote_head_points_at,
605 const char *branch_top,
606 const char *msg,
607 struct transport *transport,
608 int check_connectivity)
610 const struct ref *rm = mapped_refs;
612 if (check_connectivity) {
613 if (transport->progress)
614 fprintf(stderr, _("Checking connectivity... "));
615 if (check_everything_connected_with_transport(iterate_ref_map,
616 0, &rm, transport))
617 die(_("remote did not send all necessary objects"));
618 if (transport->progress)
619 fprintf(stderr, _("done.\n"));
622 if (refs) {
623 write_remote_refs(mapped_refs);
624 if (option_single_branch)
625 write_followtags(refs, msg);
628 if (remote_head_points_at && !option_bare) {
629 struct strbuf head_ref = STRBUF_INIT;
630 strbuf_addstr(&head_ref, branch_top);
631 strbuf_addstr(&head_ref, "HEAD");
632 create_symref(head_ref.buf,
633 remote_head_points_at->peer_ref->name,
634 msg);
638 static void update_head(const struct ref *our, const struct ref *remote,
639 const char *msg)
641 const char *head;
642 if (our && skip_prefix(our->name, "refs/heads/", &head)) {
643 /* Local default branch link */
644 create_symref("HEAD", our->name, NULL);
645 if (!option_bare) {
646 update_ref(msg, "HEAD", our->old_sha1, NULL, 0,
647 UPDATE_REFS_DIE_ON_ERR);
648 install_branch_config(0, head, option_origin, our->name);
650 } else if (our) {
651 struct commit *c = lookup_commit_reference(our->old_sha1);
652 /* --branch specifies a non-branch (i.e. tags), detach HEAD */
653 update_ref(msg, "HEAD", c->object.sha1,
654 NULL, REF_NODEREF, UPDATE_REFS_DIE_ON_ERR);
655 } else if (remote) {
657 * We know remote HEAD points to a non-branch, or
658 * HEAD points to a branch but we don't know which one.
659 * Detach HEAD in all these cases.
661 update_ref(msg, "HEAD", remote->old_sha1,
662 NULL, REF_NODEREF, UPDATE_REFS_DIE_ON_ERR);
666 static int checkout(void)
668 unsigned char sha1[20];
669 char *head;
670 struct lock_file *lock_file;
671 struct unpack_trees_options opts;
672 struct tree *tree;
673 struct tree_desc t;
674 int err = 0;
676 if (option_no_checkout)
677 return 0;
679 head = resolve_refdup("HEAD", RESOLVE_REF_READING, sha1, NULL);
680 if (!head) {
681 warning(_("remote HEAD refers to nonexistent ref, "
682 "unable to checkout.\n"));
683 return 0;
685 if (!strcmp(head, "HEAD")) {
686 if (advice_detached_head)
687 detach_advice(sha1_to_hex(sha1));
688 } else {
689 if (!starts_with(head, "refs/heads/"))
690 die(_("HEAD not found below refs/heads!"));
692 free(head);
694 /* We need to be in the new work tree for the checkout */
695 setup_work_tree();
697 lock_file = xcalloc(1, sizeof(struct lock_file));
698 hold_locked_index(lock_file, 1);
700 memset(&opts, 0, sizeof opts);
701 opts.update = 1;
702 opts.merge = 1;
703 opts.fn = oneway_merge;
704 opts.verbose_update = (option_verbosity >= 0);
705 opts.src_index = &the_index;
706 opts.dst_index = &the_index;
708 tree = parse_tree_indirect(sha1);
709 parse_tree(tree);
710 init_tree_desc(&t, tree->buffer, tree->size);
711 if (unpack_trees(1, &t, &opts) < 0)
712 die(_("unable to checkout working tree"));
714 if (write_locked_index(&the_index, lock_file, COMMIT_LOCK))
715 die(_("unable to write new index file"));
717 err |= run_hook_le(NULL, "post-checkout", sha1_to_hex(null_sha1),
718 sha1_to_hex(sha1), "1", NULL);
720 if (!err && option_recursive)
721 err = run_command_v_opt(argv_submodule, RUN_GIT_CMD);
723 return err;
726 static int write_one_config(const char *key, const char *value, void *data)
728 return git_config_set_multivar(key, value ? value : "true", "^$", 0);
731 static void write_config(struct string_list *config)
733 int i;
735 for (i = 0; i < config->nr; i++) {
736 if (git_config_parse_parameter(config->items[i].string,
737 write_one_config, NULL) < 0)
738 die("unable to write parameters to config file");
742 static void write_refspec_config(const char *src_ref_prefix,
743 const struct ref *our_head_points_at,
744 const struct ref *remote_head_points_at,
745 struct strbuf *branch_top)
747 struct strbuf key = STRBUF_INIT;
748 struct strbuf value = STRBUF_INIT;
750 if (option_mirror || !option_bare) {
751 if (option_single_branch && !option_mirror) {
752 if (option_branch) {
753 if (starts_with(our_head_points_at->name, "refs/tags/"))
754 strbuf_addf(&value, "+%s:%s", our_head_points_at->name,
755 our_head_points_at->name);
756 else
757 strbuf_addf(&value, "+%s:%s%s", our_head_points_at->name,
758 branch_top->buf, option_branch);
759 } else if (remote_head_points_at) {
760 const char *head = remote_head_points_at->name;
761 if (!skip_prefix(head, "refs/heads/", &head))
762 die("BUG: remote HEAD points at non-head?");
764 strbuf_addf(&value, "+%s:%s%s", remote_head_points_at->name,
765 branch_top->buf, head);
768 * otherwise, the next "git fetch" will
769 * simply fetch from HEAD without updating
770 * any remote-tracking branch, which is what
771 * we want.
773 } else {
774 strbuf_addf(&value, "+%s*:%s*", src_ref_prefix, branch_top->buf);
776 /* Configure the remote */
777 if (value.len) {
778 strbuf_addf(&key, "remote.%s.fetch", option_origin);
779 git_config_set_multivar(key.buf, value.buf, "^$", 0);
780 strbuf_reset(&key);
782 if (option_mirror) {
783 strbuf_addf(&key, "remote.%s.mirror", option_origin);
784 git_config_set(key.buf, "true");
785 strbuf_reset(&key);
790 strbuf_release(&key);
791 strbuf_release(&value);
794 static void dissociate_from_references(void)
796 static const char* argv[] = { "repack", "-a", "-d", NULL };
798 if (run_command_v_opt(argv, RUN_GIT_CMD|RUN_COMMAND_NO_STDIN))
799 die(_("cannot repack to clean up"));
800 if (unlink(git_path("objects/info/alternates")) && errno != ENOENT)
801 die_errno(_("cannot unlink temporary alternates file"));
804 int cmd_clone(int argc, const char **argv, const char *prefix)
806 int is_bundle = 0, is_local;
807 struct stat buf;
808 const char *repo_name, *repo, *work_tree, *git_dir;
809 char *path, *dir;
810 int dest_exists;
811 const struct ref *refs, *remote_head;
812 const struct ref *remote_head_points_at;
813 const struct ref *our_head_points_at;
814 struct ref *mapped_refs;
815 const struct ref *ref;
816 struct strbuf key = STRBUF_INIT, value = STRBUF_INIT;
817 struct strbuf branch_top = STRBUF_INIT, reflog_msg = STRBUF_INIT;
818 struct transport *transport = NULL;
819 const char *src_ref_prefix = "refs/heads/";
820 struct remote *remote;
821 int err = 0, complete_refs_before_fetch = 1;
823 struct refspec *refspec;
824 const char *fetch_pattern;
826 packet_trace_identity("clone");
827 argc = parse_options(argc, argv, prefix, builtin_clone_options,
828 builtin_clone_usage, 0);
830 if (argc > 2)
831 usage_msg_opt(_("Too many arguments."),
832 builtin_clone_usage, builtin_clone_options);
834 if (argc == 0)
835 usage_msg_opt(_("You must specify a repository to clone."),
836 builtin_clone_usage, builtin_clone_options);
838 if (option_single_branch == -1)
839 option_single_branch = option_depth ? 1 : 0;
841 if (option_mirror)
842 option_bare = 1;
844 if (option_bare) {
845 if (option_origin)
846 die(_("--bare and --origin %s options are incompatible."),
847 option_origin);
848 if (real_git_dir)
849 die(_("--bare and --separate-git-dir are incompatible."));
850 option_no_checkout = 1;
853 if (!option_origin)
854 option_origin = "origin";
856 repo_name = argv[0];
858 path = get_repo_path(repo_name, &is_bundle);
859 if (path)
860 repo = xstrdup(absolute_path(repo_name));
861 else if (!strchr(repo_name, ':'))
862 die(_("repository '%s' does not exist"), repo_name);
863 else
864 repo = repo_name;
866 /* no need to be strict, transport_set_option() will validate it again */
867 if (option_depth && atoi(option_depth) < 1)
868 die(_("depth %s is not a positive number"), option_depth);
870 if (argc == 2)
871 dir = xstrdup(argv[1]);
872 else
873 dir = guess_dir_name(repo_name, is_bundle, option_bare);
874 strip_trailing_slashes(dir);
876 dest_exists = !stat(dir, &buf);
877 if (dest_exists && !is_empty_dir(dir))
878 die(_("destination path '%s' already exists and is not "
879 "an empty directory."), dir);
881 strbuf_addf(&reflog_msg, "clone: from %s", repo);
883 if (option_bare)
884 work_tree = NULL;
885 else {
886 work_tree = getenv("GIT_WORK_TREE");
887 if (work_tree && !stat(work_tree, &buf))
888 die(_("working tree '%s' already exists."), work_tree);
891 if (option_bare || work_tree)
892 git_dir = xstrdup(dir);
893 else {
894 work_tree = dir;
895 git_dir = mkpathdup("%s/.git", dir);
898 atexit(remove_junk);
899 sigchain_push_common(remove_junk_on_signal);
901 if (!option_bare) {
902 if (safe_create_leading_directories_const(work_tree) < 0)
903 die_errno(_("could not create leading directories of '%s'"),
904 work_tree);
905 if (!dest_exists && mkdir(work_tree, 0777))
906 die_errno(_("could not create work tree dir '%s'"),
907 work_tree);
908 junk_work_tree = work_tree;
909 set_git_work_tree(work_tree);
912 junk_git_dir = git_dir;
913 if (safe_create_leading_directories_const(git_dir) < 0)
914 die(_("could not create leading directories of '%s'"), git_dir);
916 set_git_dir_init(git_dir, real_git_dir, 0);
917 if (real_git_dir) {
918 git_dir = real_git_dir;
919 junk_git_dir = real_git_dir;
922 if (0 <= option_verbosity) {
923 if (option_bare)
924 fprintf(stderr, _("Cloning into bare repository '%s'...\n"), dir);
925 else
926 fprintf(stderr, _("Cloning into '%s'...\n"), dir);
928 init_db(option_template, INIT_DB_QUIET);
929 write_config(&option_config);
931 git_config(git_default_config, NULL);
933 if (option_bare) {
934 if (option_mirror)
935 src_ref_prefix = "refs/";
936 strbuf_addstr(&branch_top, src_ref_prefix);
938 git_config_set("core.bare", "true");
939 } else {
940 strbuf_addf(&branch_top, "refs/remotes/%s/", option_origin);
943 strbuf_addf(&value, "+%s*:%s*", src_ref_prefix, branch_top.buf);
944 strbuf_addf(&key, "remote.%s.url", option_origin);
945 git_config_set(key.buf, repo);
946 strbuf_reset(&key);
948 if (option_reference.nr)
949 setup_reference();
950 else if (option_dissociate) {
951 warning(_("--dissociate given, but there is no --reference"));
952 option_dissociate = 0;
955 fetch_pattern = value.buf;
956 refspec = parse_fetch_refspec(1, &fetch_pattern);
958 strbuf_reset(&value);
960 remote = remote_get(option_origin);
961 transport = transport_get(remote, remote->url[0]);
962 transport_set_verbosity(transport, option_verbosity, option_progress);
964 path = get_repo_path(remote->url[0], &is_bundle);
965 is_local = option_local != 0 && path && !is_bundle;
966 if (is_local) {
967 if (option_depth)
968 warning(_("--depth is ignored in local clones; use file:// instead."));
969 if (!access(mkpath("%s/shallow", path), F_OK)) {
970 if (option_local > 0)
971 warning(_("source repository is shallow, ignoring --local"));
972 is_local = 0;
975 if (option_local > 0 && !is_local)
976 warning(_("--local is ignored"));
977 transport->cloning = 1;
979 if (!transport->get_refs_list || (!is_local && !transport->fetch))
980 die(_("Don't know how to clone %s"), transport->url);
982 transport_set_option(transport, TRANS_OPT_KEEP, "yes");
984 if (option_depth)
985 transport_set_option(transport, TRANS_OPT_DEPTH,
986 option_depth);
987 if (option_single_branch)
988 transport_set_option(transport, TRANS_OPT_FOLLOWTAGS, "1");
990 if (option_upload_pack)
991 transport_set_option(transport, TRANS_OPT_UPLOADPACK,
992 option_upload_pack);
994 if (transport->smart_options && !option_depth)
995 transport->smart_options->check_self_contained_and_connected = 1;
997 refs = transport_get_remote_refs(transport);
999 if (refs) {
1000 mapped_refs = wanted_peer_refs(refs, refspec);
1002 * transport_get_remote_refs() may return refs with null sha-1
1003 * in mapped_refs (see struct transport->get_refs_list
1004 * comment). In that case we need fetch it early because
1005 * remote_head code below relies on it.
1007 * for normal clones, transport_get_remote_refs() should
1008 * return reliable ref set, we can delay cloning until after
1009 * remote HEAD check.
1011 for (ref = refs; ref; ref = ref->next)
1012 if (is_null_sha1(ref->old_sha1)) {
1013 complete_refs_before_fetch = 0;
1014 break;
1017 if (!is_local && !complete_refs_before_fetch)
1018 transport_fetch_refs(transport, mapped_refs);
1020 remote_head = find_ref_by_name(refs, "HEAD");
1021 remote_head_points_at =
1022 guess_remote_head(remote_head, mapped_refs, 0);
1024 if (option_branch) {
1025 our_head_points_at =
1026 find_remote_branch(mapped_refs, option_branch);
1028 if (!our_head_points_at)
1029 die(_("Remote branch %s not found in upstream %s"),
1030 option_branch, option_origin);
1032 else
1033 our_head_points_at = remote_head_points_at;
1035 else {
1036 if (option_branch)
1037 die(_("Remote branch %s not found in upstream %s"),
1038 option_branch, option_origin);
1040 warning(_("You appear to have cloned an empty repository."));
1041 mapped_refs = NULL;
1042 our_head_points_at = NULL;
1043 remote_head_points_at = NULL;
1044 remote_head = NULL;
1045 option_no_checkout = 1;
1046 if (!option_bare)
1047 install_branch_config(0, "master", option_origin,
1048 "refs/heads/master");
1051 write_refspec_config(src_ref_prefix, our_head_points_at,
1052 remote_head_points_at, &branch_top);
1054 if (is_local)
1055 clone_local(path, git_dir);
1056 else if (refs && complete_refs_before_fetch)
1057 transport_fetch_refs(transport, mapped_refs);
1059 update_remote_refs(refs, mapped_refs, remote_head_points_at,
1060 branch_top.buf, reflog_msg.buf, transport, !is_local);
1062 update_head(our_head_points_at, remote_head, reflog_msg.buf);
1064 transport_unlock_pack(transport);
1065 transport_disconnect(transport);
1067 if (option_dissociate)
1068 dissociate_from_references();
1070 junk_mode = JUNK_LEAVE_REPO;
1071 err = checkout();
1073 strbuf_release(&reflog_msg);
1074 strbuf_release(&branch_top);
1075 strbuf_release(&key);
1076 strbuf_release(&value);
1077 junk_mode = JUNK_LEAVE_ALL;
1079 free(refspec);
1080 return err;