push: document & test --force-with-lease with multiple remotes
[git/git.git] / builtin / clone.c
1 /*
2 * Builtin "git clone"
3 *
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
7 *
8 * Clone a repository into a different directory that does not yet exist.
9 */
10
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"
27
28 /*
29 * Overall FIXMEs:
30 * - respect DB_ENVIRONMENT for .git/objects.
31 *
32 * Implementation notes:
33 * - dropping use-separate-remote and no-separate-remote compatibility
34 *
35 */
36 static const char * const builtin_clone_usage[] = {
37 N_("git clone [<options>] [--] <repo> [<dir>]"),
38 NULL
39 };
40
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 int option_shallow_submodules;
44 static int deepen;
45 static char *option_template, *option_depth, *option_since;
46 static char *option_origin = NULL;
47 static char *option_branch = NULL;
48 static struct string_list option_not = STRING_LIST_INIT_NODUP;
49 static const char *real_git_dir;
50 static char *option_upload_pack = "git-upload-pack";
51 static int option_verbosity;
52 static int option_progress = -1;
53 static enum transport_family family;
54 static struct string_list option_config = STRING_LIST_INIT_NODUP;
55 static struct string_list option_required_reference = STRING_LIST_INIT_NODUP;
56 static struct string_list option_optional_reference = STRING_LIST_INIT_NODUP;
57 static int option_dissociate;
58 static int max_jobs = -1;
59
60 static struct option builtin_clone_options[] = {
61 OPT__VERBOSITY(&option_verbosity),
62 OPT_BOOL(0, "progress", &option_progress,
63 N_("force progress reporting")),
64 OPT_BOOL('n', "no-checkout", &option_no_checkout,
65 N_("don't create a checkout")),
66 OPT_BOOL(0, "bare", &option_bare, N_("create a bare repository")),
67 OPT_HIDDEN_BOOL(0, "naked", &option_bare,
68 N_("create a bare repository")),
69 OPT_BOOL(0, "mirror", &option_mirror,
70 N_("create a mirror repository (implies bare)")),
71 OPT_BOOL('l', "local", &option_local,
72 N_("to clone from a local repository")),
73 OPT_BOOL(0, "no-hardlinks", &option_no_hardlinks,
74 N_("don't use local hardlinks, always copy")),
75 OPT_BOOL('s', "shared", &option_shared,
76 N_("setup as shared repository")),
77 OPT_BOOL(0, "recursive", &option_recursive,
78 N_("initialize submodules in the clone")),
79 OPT_BOOL(0, "recurse-submodules", &option_recursive,
80 N_("initialize submodules in the clone")),
81 OPT_INTEGER('j', "jobs", &max_jobs,
82 N_("number of submodules cloned in parallel")),
83 OPT_STRING(0, "template", &option_template, N_("template-directory"),
84 N_("directory from which templates will be used")),
85 OPT_STRING_LIST(0, "reference", &option_required_reference, N_("repo"),
86 N_("reference repository")),
87 OPT_STRING_LIST(0, "reference-if-able", &option_optional_reference,
88 N_("repo"), N_("reference repository")),
89 OPT_BOOL(0, "dissociate", &option_dissociate,
90 N_("use --reference only while cloning")),
91 OPT_STRING('o', "origin", &option_origin, N_("name"),
92 N_("use <name> instead of 'origin' to track upstream")),
93 OPT_STRING('b', "branch", &option_branch, N_("branch"),
94 N_("checkout <branch> instead of the remote's HEAD")),
95 OPT_STRING('u', "upload-pack", &option_upload_pack, N_("path"),
96 N_("path to git-upload-pack on the remote")),
97 OPT_STRING(0, "depth", &option_depth, N_("depth"),
98 N_("create a shallow clone of that depth")),
99 OPT_STRING(0, "shallow-since", &option_since, N_("time"),
100 N_("create a shallow clone since a specific time")),
101 OPT_STRING_LIST(0, "shallow-exclude", &option_not, N_("revision"),
102 N_("deepen history of shallow clone, excluding rev")),
103 OPT_BOOL(0, "single-branch", &option_single_branch,
104 N_("clone only one branch, HEAD or --branch")),
105 OPT_BOOL(0, "shallow-submodules", &option_shallow_submodules,
106 N_("any cloned submodules will be shallow")),
107 OPT_STRING(0, "separate-git-dir", &real_git_dir, N_("gitdir"),
108 N_("separate git dir from working tree")),
109 OPT_STRING_LIST('c', "config", &option_config, N_("key=value"),
110 N_("set config inside the new repository")),
111 OPT_SET_INT('4', "ipv4", &family, N_("use IPv4 addresses only"),
112 TRANSPORT_FAMILY_IPV4),
113 OPT_SET_INT('6', "ipv6", &family, N_("use IPv6 addresses only"),
114 TRANSPORT_FAMILY_IPV6),
115 OPT_END()
116 };
117
118 static const char *get_repo_path_1(struct strbuf *path, int *is_bundle)
119 {
120 static char *suffix[] = { "/.git", "", ".git/.git", ".git" };
121 static char *bundle_suffix[] = { ".bundle", "" };
122 size_t baselen = path->len;
123 struct stat st;
124 int i;
125
126 for (i = 0; i < ARRAY_SIZE(suffix); i++) {
127 strbuf_setlen(path, baselen);
128 strbuf_addstr(path, suffix[i]);
129 if (stat(path->buf, &st))
130 continue;
131 if (S_ISDIR(st.st_mode) && is_git_directory(path->buf)) {
132 *is_bundle = 0;
133 return path->buf;
134 } else if (S_ISREG(st.st_mode) && st.st_size > 8) {
135 /* Is it a "gitfile"? */
136 char signature[8];
137 const char *dst;
138 int len, fd = open(path->buf, O_RDONLY);
139 if (fd < 0)
140 continue;
141 len = read_in_full(fd, signature, 8);
142 close(fd);
143 if (len != 8 || strncmp(signature, "gitdir: ", 8))
144 continue;
145 dst = read_gitfile(path->buf);
146 if (dst) {
147 *is_bundle = 0;
148 return dst;
149 }
150 }
151 }
152
153 for (i = 0; i < ARRAY_SIZE(bundle_suffix); i++) {
154 strbuf_setlen(path, baselen);
155 strbuf_addstr(path, bundle_suffix[i]);
156 if (!stat(path->buf, &st) && S_ISREG(st.st_mode)) {
157 *is_bundle = 1;
158 return path->buf;
159 }
160 }
161
162 return NULL;
163 }
164
165 static char *get_repo_path(const char *repo, int *is_bundle)
166 {
167 struct strbuf path = STRBUF_INIT;
168 const char *raw;
169 char *canon;
170
171 strbuf_addstr(&path, repo);
172 raw = get_repo_path_1(&path, is_bundle);
173 canon = raw ? absolute_pathdup(raw) : NULL;
174 strbuf_release(&path);
175 return canon;
176 }
177
178 static char *guess_dir_name(const char *repo, int is_bundle, int is_bare)
179 {
180 const char *end = repo + strlen(repo), *start, *ptr;
181 size_t len;
182 char *dir;
183
184 /*
185 * Skip scheme.
186 */
187 start = strstr(repo, "://");
188 if (start == NULL)
189 start = repo;
190 else
191 start += 3;
192
193 /*
194 * Skip authentication data. The stripping does happen
195 * greedily, such that we strip up to the last '@' inside
196 * the host part.
197 */
198 for (ptr = start; ptr < end && !is_dir_sep(*ptr); ptr++) {
199 if (*ptr == '@')
200 start = ptr + 1;
201 }
202
203 /*
204 * Strip trailing spaces, slashes and /.git
205 */
206 while (start < end && (is_dir_sep(end[-1]) || isspace(end[-1])))
207 end--;
208 if (end - start > 5 && is_dir_sep(end[-5]) &&
209 !strncmp(end - 4, ".git", 4)) {
210 end -= 5;
211 while (start < end && is_dir_sep(end[-1]))
212 end--;
213 }
214
215 /*
216 * Strip trailing port number if we've got only a
217 * hostname (that is, there is no dir separator but a
218 * colon). This check is required such that we do not
219 * strip URI's like '/foo/bar:2222.git', which should
220 * result in a dir '2222' being guessed due to backwards
221 * compatibility.
222 */
223 if (memchr(start, '/', end - start) == NULL
224 && memchr(start, ':', end - start) != NULL) {
225 ptr = end;
226 while (start < ptr && isdigit(ptr[-1]) && ptr[-1] != ':')
227 ptr--;
228 if (start < ptr && ptr[-1] == ':')
229 end = ptr - 1;
230 }
231
232 /*
233 * Find last component. To remain backwards compatible we
234 * also regard colons as path separators, such that
235 * cloning a repository 'foo:bar.git' would result in a
236 * directory 'bar' being guessed.
237 */
238 ptr = end;
239 while (start < ptr && !is_dir_sep(ptr[-1]) && ptr[-1] != ':')
240 ptr--;
241 start = ptr;
242
243 /*
244 * Strip .{bundle,git}.
245 */
246 len = end - start;
247 strip_suffix_mem(start, &len, is_bundle ? ".bundle" : ".git");
248
249 if (!len || (len == 1 && *start == '/'))
250 die(_("No directory name could be guessed.\n"
251 "Please specify a directory on the command line"));
252
253 if (is_bare)
254 dir = xstrfmt("%.*s.git", (int)len, start);
255 else
256 dir = xstrndup(start, len);
257 /*
258 * Replace sequences of 'control' characters and whitespace
259 * with one ascii space, remove leading and trailing spaces.
260 */
261 if (*dir) {
262 char *out = dir;
263 int prev_space = 1 /* strip leading whitespace */;
264 for (end = dir; *end; ++end) {
265 char ch = *end;
266 if ((unsigned char)ch < '\x20')
267 ch = '\x20';
268 if (isspace(ch)) {
269 if (prev_space)
270 continue;
271 prev_space = 1;
272 } else
273 prev_space = 0;
274 *out++ = ch;
275 }
276 *out = '\0';
277 if (out > dir && prev_space)
278 out[-1] = '\0';
279 }
280 return dir;
281 }
282
283 static void strip_trailing_slashes(char *dir)
284 {
285 char *end = dir + strlen(dir);
286
287 while (dir < end - 1 && is_dir_sep(end[-1]))
288 end--;
289 *end = '\0';
290 }
291
292 static int add_one_reference(struct string_list_item *item, void *cb_data)
293 {
294 struct strbuf err = STRBUF_INIT;
295 int *required = cb_data;
296 char *ref_git = compute_alternate_path(item->string, &err);
297
298 if (!ref_git) {
299 if (*required)
300 die("%s", err.buf);
301 else
302 fprintf(stderr,
303 _("info: Could not add alternate for '%s': %s\n"),
304 item->string, err.buf);
305 } else {
306 struct strbuf sb = STRBUF_INIT;
307 strbuf_addf(&sb, "%s/objects", ref_git);
308 add_to_alternates_file(sb.buf);
309 strbuf_release(&sb);
310 }
311
312 strbuf_release(&err);
313 free(ref_git);
314 return 0;
315 }
316
317 static void setup_reference(void)
318 {
319 int required = 1;
320 for_each_string_list(&option_required_reference,
321 add_one_reference, &required);
322 required = 0;
323 for_each_string_list(&option_optional_reference,
324 add_one_reference, &required);
325 }
326
327 static void copy_alternates(struct strbuf *src, struct strbuf *dst,
328 const char *src_repo)
329 {
330 /*
331 * Read from the source objects/info/alternates file
332 * and copy the entries to corresponding file in the
333 * destination repository with add_to_alternates_file().
334 * Both src and dst have "$path/objects/info/alternates".
335 *
336 * Instead of copying bit-for-bit from the original,
337 * we need to append to existing one so that the already
338 * created entry via "clone -s" is not lost, and also
339 * to turn entries with paths relative to the original
340 * absolute, so that they can be used in the new repository.
341 */
342 FILE *in = fopen(src->buf, "r");
343 struct strbuf line = STRBUF_INIT;
344
345 while (strbuf_getline(&line, in) != EOF) {
346 char *abs_path;
347 if (!line.len || line.buf[0] == '#')
348 continue;
349 if (is_absolute_path(line.buf)) {
350 add_to_alternates_file(line.buf);
351 continue;
352 }
353 abs_path = mkpathdup("%s/objects/%s", src_repo, line.buf);
354 if (!normalize_path_copy(abs_path, abs_path))
355 add_to_alternates_file(abs_path);
356 else
357 warning("skipping invalid relative alternate: %s/%s",
358 src_repo, line.buf);
359 free(abs_path);
360 }
361 strbuf_release(&line);
362 fclose(in);
363 }
364
365 static void copy_or_link_directory(struct strbuf *src, struct strbuf *dest,
366 const char *src_repo, int src_baselen)
367 {
368 struct dirent *de;
369 struct stat buf;
370 int src_len, dest_len;
371 DIR *dir;
372
373 dir = opendir(src->buf);
374 if (!dir)
375 die_errno(_("failed to open '%s'"), src->buf);
376
377 if (mkdir(dest->buf, 0777)) {
378 if (errno != EEXIST)
379 die_errno(_("failed to create directory '%s'"), dest->buf);
380 else if (stat(dest->buf, &buf))
381 die_errno(_("failed to stat '%s'"), dest->buf);
382 else if (!S_ISDIR(buf.st_mode))
383 die(_("%s exists and is not a directory"), dest->buf);
384 }
385
386 strbuf_addch(src, '/');
387 src_len = src->len;
388 strbuf_addch(dest, '/');
389 dest_len = dest->len;
390
391 while ((de = readdir(dir)) != NULL) {
392 strbuf_setlen(src, src_len);
393 strbuf_addstr(src, de->d_name);
394 strbuf_setlen(dest, dest_len);
395 strbuf_addstr(dest, de->d_name);
396 if (stat(src->buf, &buf)) {
397 warning (_("failed to stat %s\n"), src->buf);
398 continue;
399 }
400 if (S_ISDIR(buf.st_mode)) {
401 if (de->d_name[0] != '.')
402 copy_or_link_directory(src, dest,
403 src_repo, src_baselen);
404 continue;
405 }
406
407 /* Files that cannot be copied bit-for-bit... */
408 if (!strcmp(src->buf + src_baselen, "/info/alternates")) {
409 copy_alternates(src, dest, src_repo);
410 continue;
411 }
412
413 if (unlink(dest->buf) && errno != ENOENT)
414 die_errno(_("failed to unlink '%s'"), dest->buf);
415 if (!option_no_hardlinks) {
416 if (!link(src->buf, dest->buf))
417 continue;
418 if (option_local > 0)
419 die_errno(_("failed to create link '%s'"), dest->buf);
420 option_no_hardlinks = 1;
421 }
422 if (copy_file_with_time(dest->buf, src->buf, 0666))
423 die_errno(_("failed to copy file to '%s'"), dest->buf);
424 }
425 closedir(dir);
426 }
427
428 static void clone_local(const char *src_repo, const char *dest_repo)
429 {
430 if (option_shared) {
431 struct strbuf alt = STRBUF_INIT;
432 strbuf_addf(&alt, "%s/objects", src_repo);
433 add_to_alternates_file(alt.buf);
434 strbuf_release(&alt);
435 } else {
436 struct strbuf src = STRBUF_INIT;
437 struct strbuf dest = STRBUF_INIT;
438 get_common_dir(&src, src_repo);
439 get_common_dir(&dest, dest_repo);
440 strbuf_addstr(&src, "/objects");
441 strbuf_addstr(&dest, "/objects");
442 copy_or_link_directory(&src, &dest, src_repo, src.len);
443 strbuf_release(&src);
444 strbuf_release(&dest);
445 }
446
447 if (0 <= option_verbosity)
448 fprintf(stderr, _("done.\n"));
449 }
450
451 static const char *junk_work_tree;
452 static const char *junk_git_dir;
453 static enum {
454 JUNK_LEAVE_NONE,
455 JUNK_LEAVE_REPO,
456 JUNK_LEAVE_ALL
457 } junk_mode = JUNK_LEAVE_NONE;
458
459 static const char junk_leave_repo_msg[] =
460 N_("Clone succeeded, but checkout failed.\n"
461 "You can inspect what was checked out with 'git status'\n"
462 "and retry the checkout with 'git checkout -f HEAD'\n");
463
464 static void remove_junk(void)
465 {
466 struct strbuf sb = STRBUF_INIT;
467
468 switch (junk_mode) {
469 case JUNK_LEAVE_REPO:
470 warning("%s", _(junk_leave_repo_msg));
471 /* fall-through */
472 case JUNK_LEAVE_ALL:
473 return;
474 default:
475 /* proceed to removal */
476 break;
477 }
478
479 if (junk_git_dir) {
480 strbuf_addstr(&sb, junk_git_dir);
481 remove_dir_recursively(&sb, 0);
482 strbuf_reset(&sb);
483 }
484 if (junk_work_tree) {
485 strbuf_addstr(&sb, junk_work_tree);
486 remove_dir_recursively(&sb, 0);
487 strbuf_reset(&sb);
488 }
489 }
490
491 static void remove_junk_on_signal(int signo)
492 {
493 remove_junk();
494 sigchain_pop(signo);
495 raise(signo);
496 }
497
498 static struct ref *find_remote_branch(const struct ref *refs, const char *branch)
499 {
500 struct ref *ref;
501 struct strbuf head = STRBUF_INIT;
502 strbuf_addstr(&head, "refs/heads/");
503 strbuf_addstr(&head, branch);
504 ref = find_ref_by_name(refs, head.buf);
505 strbuf_release(&head);
506
507 if (ref)
508 return ref;
509
510 strbuf_addstr(&head, "refs/tags/");
511 strbuf_addstr(&head, branch);
512 ref = find_ref_by_name(refs, head.buf);
513 strbuf_release(&head);
514
515 return ref;
516 }
517
518 static struct ref *wanted_peer_refs(const struct ref *refs,
519 struct refspec *refspec)
520 {
521 struct ref *head = copy_ref(find_ref_by_name(refs, "HEAD"));
522 struct ref *local_refs = head;
523 struct ref **tail = head ? &head->next : &local_refs;
524
525 if (option_single_branch) {
526 struct ref *remote_head = NULL;
527
528 if (!option_branch)
529 remote_head = guess_remote_head(head, refs, 0);
530 else {
531 local_refs = NULL;
532 tail = &local_refs;
533 remote_head = copy_ref(find_remote_branch(refs, option_branch));
534 }
535
536 if (!remote_head && option_branch)
537 warning(_("Could not find remote branch %s to clone."),
538 option_branch);
539 else {
540 get_fetch_map(remote_head, refspec, &tail, 0);
541
542 /* if --branch=tag, pull the requested tag explicitly */
543 get_fetch_map(remote_head, tag_refspec, &tail, 0);
544 }
545 } else
546 get_fetch_map(refs, refspec, &tail, 0);
547
548 if (!option_mirror && !option_single_branch)
549 get_fetch_map(refs, tag_refspec, &tail, 0);
550
551 return local_refs;
552 }
553
554 static void write_remote_refs(const struct ref *local_refs)
555 {
556 const struct ref *r;
557
558 struct ref_transaction *t;
559 struct strbuf err = STRBUF_INIT;
560
561 t = ref_transaction_begin(&err);
562 if (!t)
563 die("%s", err.buf);
564
565 for (r = local_refs; r; r = r->next) {
566 if (!r->peer_ref)
567 continue;
568 if (ref_transaction_create(t, r->peer_ref->name, r->old_oid.hash,
569 0, NULL, &err))
570 die("%s", err.buf);
571 }
572
573 if (initial_ref_transaction_commit(t, &err))
574 die("%s", err.buf);
575
576 strbuf_release(&err);
577 ref_transaction_free(t);
578 }
579
580 static void write_followtags(const struct ref *refs, const char *msg)
581 {
582 const struct ref *ref;
583 for (ref = refs; ref; ref = ref->next) {
584 if (!starts_with(ref->name, "refs/tags/"))
585 continue;
586 if (ends_with(ref->name, "^{}"))
587 continue;
588 if (!has_object_file(&ref->old_oid))
589 continue;
590 update_ref(msg, ref->name, ref->old_oid.hash,
591 NULL, 0, UPDATE_REFS_DIE_ON_ERR);
592 }
593 }
594
595 static int iterate_ref_map(void *cb_data, unsigned char sha1[20])
596 {
597 struct ref **rm = cb_data;
598 struct ref *ref = *rm;
599
600 /*
601 * Skip anything missing a peer_ref, which we are not
602 * actually going to write a ref for.
603 */
604 while (ref && !ref->peer_ref)
605 ref = ref->next;
606 /* Returning -1 notes "end of list" to the caller. */
607 if (!ref)
608 return -1;
609
610 hashcpy(sha1, ref->old_oid.hash);
611 *rm = ref->next;
612 return 0;
613 }
614
615 static void update_remote_refs(const struct ref *refs,
616 const struct ref *mapped_refs,
617 const struct ref *remote_head_points_at,
618 const char *branch_top,
619 const char *msg,
620 struct transport *transport,
621 int check_connectivity)
622 {
623 const struct ref *rm = mapped_refs;
624
625 if (check_connectivity) {
626 struct check_connected_options opt = CHECK_CONNECTED_INIT;
627
628 opt.transport = transport;
629 opt.progress = transport->progress;
630
631 if (check_connected(iterate_ref_map, &rm, &opt))
632 die(_("remote did not send all necessary objects"));
633 }
634
635 if (refs) {
636 write_remote_refs(mapped_refs);
637 if (option_single_branch)
638 write_followtags(refs, msg);
639 }
640
641 if (remote_head_points_at && !option_bare) {
642 struct strbuf head_ref = STRBUF_INIT;
643 strbuf_addstr(&head_ref, branch_top);
644 strbuf_addstr(&head_ref, "HEAD");
645 if (create_symref(head_ref.buf,
646 remote_head_points_at->peer_ref->name,
647 msg) < 0)
648 die(_("unable to update %s"), head_ref.buf);
649 strbuf_release(&head_ref);
650 }
651 }
652
653 static void update_head(const struct ref *our, const struct ref *remote,
654 const char *msg)
655 {
656 const char *head;
657 if (our && skip_prefix(our->name, "refs/heads/", &head)) {
658 /* Local default branch link */
659 if (create_symref("HEAD", our->name, NULL) < 0)
660 die(_("unable to update HEAD"));
661 if (!option_bare) {
662 update_ref(msg, "HEAD", our->old_oid.hash, NULL, 0,
663 UPDATE_REFS_DIE_ON_ERR);
664 install_branch_config(0, head, option_origin, our->name);
665 }
666 } else if (our) {
667 struct commit *c = lookup_commit_reference(our->old_oid.hash);
668 /* --branch specifies a non-branch (i.e. tags), detach HEAD */
669 update_ref(msg, "HEAD", c->object.oid.hash,
670 NULL, REF_NODEREF, UPDATE_REFS_DIE_ON_ERR);
671 } else if (remote) {
672 /*
673 * We know remote HEAD points to a non-branch, or
674 * HEAD points to a branch but we don't know which one.
675 * Detach HEAD in all these cases.
676 */
677 update_ref(msg, "HEAD", remote->old_oid.hash,
678 NULL, REF_NODEREF, UPDATE_REFS_DIE_ON_ERR);
679 }
680 }
681
682 static int checkout(int submodule_progress)
683 {
684 unsigned char sha1[20];
685 char *head;
686 struct lock_file *lock_file;
687 struct unpack_trees_options opts;
688 struct tree *tree;
689 struct tree_desc t;
690 int err = 0;
691
692 if (option_no_checkout)
693 return 0;
694
695 head = resolve_refdup("HEAD", RESOLVE_REF_READING, sha1, NULL);
696 if (!head) {
697 warning(_("remote HEAD refers to nonexistent ref, "
698 "unable to checkout.\n"));
699 return 0;
700 }
701 if (!strcmp(head, "HEAD")) {
702 if (advice_detached_head)
703 detach_advice(sha1_to_hex(sha1));
704 } else {
705 if (!starts_with(head, "refs/heads/"))
706 die(_("HEAD not found below refs/heads!"));
707 }
708 free(head);
709
710 /* We need to be in the new work tree for the checkout */
711 setup_work_tree();
712
713 lock_file = xcalloc(1, sizeof(struct lock_file));
714 hold_locked_index(lock_file, LOCK_DIE_ON_ERROR);
715
716 memset(&opts, 0, sizeof opts);
717 opts.update = 1;
718 opts.merge = 1;
719 opts.fn = oneway_merge;
720 opts.verbose_update = (option_verbosity >= 0);
721 opts.src_index = &the_index;
722 opts.dst_index = &the_index;
723
724 tree = parse_tree_indirect(sha1);
725 parse_tree(tree);
726 init_tree_desc(&t, tree->buffer, tree->size);
727 if (unpack_trees(1, &t, &opts) < 0)
728 die(_("unable to checkout working tree"));
729
730 if (write_locked_index(&the_index, lock_file, COMMIT_LOCK))
731 die(_("unable to write new index file"));
732
733 err |= run_hook_le(NULL, "post-checkout", sha1_to_hex(null_sha1),
734 sha1_to_hex(sha1), "1", NULL);
735
736 if (!err && option_recursive) {
737 struct argv_array args = ARGV_ARRAY_INIT;
738 argv_array_pushl(&args, "submodule", "update", "--init", "--recursive", NULL);
739
740 if (option_shallow_submodules == 1)
741 argv_array_push(&args, "--depth=1");
742
743 if (max_jobs != -1)
744 argv_array_pushf(&args, "--jobs=%d", max_jobs);
745
746 if (submodule_progress)
747 argv_array_push(&args, "--progress");
748
749 err = run_command_v_opt(args.argv, RUN_GIT_CMD);
750 argv_array_clear(&args);
751 }
752
753 return err;
754 }
755
756 static int write_one_config(const char *key, const char *value, void *data)
757 {
758 return git_config_set_multivar_gently(key, value ? value : "true", "^$", 0);
759 }
760
761 static void write_config(struct string_list *config)
762 {
763 int i;
764
765 for (i = 0; i < config->nr; i++) {
766 if (git_config_parse_parameter(config->items[i].string,
767 write_one_config, NULL) < 0)
768 die(_("unable to write parameters to config file"));
769 }
770 }
771
772 static void write_refspec_config(const char *src_ref_prefix,
773 const struct ref *our_head_points_at,
774 const struct ref *remote_head_points_at,
775 struct strbuf *branch_top)
776 {
777 struct strbuf key = STRBUF_INIT;
778 struct strbuf value = STRBUF_INIT;
779
780 if (option_mirror || !option_bare) {
781 if (option_single_branch && !option_mirror) {
782 if (option_branch) {
783 if (starts_with(our_head_points_at->name, "refs/tags/"))
784 strbuf_addf(&value, "+%s:%s", our_head_points_at->name,
785 our_head_points_at->name);
786 else
787 strbuf_addf(&value, "+%s:%s%s", our_head_points_at->name,
788 branch_top->buf, option_branch);
789 } else if (remote_head_points_at) {
790 const char *head = remote_head_points_at->name;
791 if (!skip_prefix(head, "refs/heads/", &head))
792 die("BUG: remote HEAD points at non-head?");
793
794 strbuf_addf(&value, "+%s:%s%s", remote_head_points_at->name,
795 branch_top->buf, head);
796 }
797 /*
798 * otherwise, the next "git fetch" will
799 * simply fetch from HEAD without updating
800 * any remote-tracking branch, which is what
801 * we want.
802 */
803 } else {
804 strbuf_addf(&value, "+%s*:%s*", src_ref_prefix, branch_top->buf);
805 }
806 /* Configure the remote */
807 if (value.len) {
808 strbuf_addf(&key, "remote.%s.fetch", option_origin);
809 git_config_set_multivar(key.buf, value.buf, "^$", 0);
810 strbuf_reset(&key);
811
812 if (option_mirror) {
813 strbuf_addf(&key, "remote.%s.mirror", option_origin);
814 git_config_set(key.buf, "true");
815 strbuf_reset(&key);
816 }
817 }
818 }
819
820 strbuf_release(&key);
821 strbuf_release(&value);
822 }
823
824 static void dissociate_from_references(void)
825 {
826 static const char* argv[] = { "repack", "-a", "-d", NULL };
827 char *alternates = git_pathdup("objects/info/alternates");
828
829 if (!access(alternates, F_OK)) {
830 if (run_command_v_opt(argv, RUN_GIT_CMD|RUN_COMMAND_NO_STDIN))
831 die(_("cannot repack to clean up"));
832 if (unlink(alternates) && errno != ENOENT)
833 die_errno(_("cannot unlink temporary alternates file"));
834 }
835 free(alternates);
836 }
837
838 int cmd_clone(int argc, const char **argv, const char *prefix)
839 {
840 int is_bundle = 0, is_local;
841 struct stat buf;
842 const char *repo_name, *repo, *work_tree, *git_dir;
843 char *path, *dir;
844 int dest_exists;
845 const struct ref *refs, *remote_head;
846 const struct ref *remote_head_points_at;
847 const struct ref *our_head_points_at;
848 struct ref *mapped_refs;
849 const struct ref *ref;
850 struct strbuf key = STRBUF_INIT, value = STRBUF_INIT;
851 struct strbuf branch_top = STRBUF_INIT, reflog_msg = STRBUF_INIT;
852 struct transport *transport = NULL;
853 const char *src_ref_prefix = "refs/heads/";
854 struct remote *remote;
855 int err = 0, complete_refs_before_fetch = 1;
856 int submodule_progress;
857
858 struct refspec *refspec;
859 const char *fetch_pattern;
860
861 packet_trace_identity("clone");
862 argc = parse_options(argc, argv, prefix, builtin_clone_options,
863 builtin_clone_usage, 0);
864
865 if (argc > 2)
866 usage_msg_opt(_("Too many arguments."),
867 builtin_clone_usage, builtin_clone_options);
868
869 if (argc == 0)
870 usage_msg_opt(_("You must specify a repository to clone."),
871 builtin_clone_usage, builtin_clone_options);
872
873 if (option_depth || option_since || option_not.nr)
874 deepen = 1;
875 if (option_single_branch == -1)
876 option_single_branch = deepen ? 1 : 0;
877
878 if (option_mirror)
879 option_bare = 1;
880
881 if (option_bare) {
882 if (option_origin)
883 die(_("--bare and --origin %s options are incompatible."),
884 option_origin);
885 if (real_git_dir)
886 die(_("--bare and --separate-git-dir are incompatible."));
887 option_no_checkout = 1;
888 }
889
890 if (!option_origin)
891 option_origin = "origin";
892
893 repo_name = argv[0];
894
895 path = get_repo_path(repo_name, &is_bundle);
896 if (path)
897 repo = absolute_pathdup(repo_name);
898 else if (!strchr(repo_name, ':'))
899 die(_("repository '%s' does not exist"), repo_name);
900 else
901 repo = repo_name;
902
903 /* no need to be strict, transport_set_option() will validate it again */
904 if (option_depth && atoi(option_depth) < 1)
905 die(_("depth %s is not a positive number"), option_depth);
906
907 if (argc == 2)
908 dir = xstrdup(argv[1]);
909 else
910 dir = guess_dir_name(repo_name, is_bundle, option_bare);
911 strip_trailing_slashes(dir);
912
913 dest_exists = !stat(dir, &buf);
914 if (dest_exists && !is_empty_dir(dir))
915 die(_("destination path '%s' already exists and is not "
916 "an empty directory."), dir);
917
918 strbuf_addf(&reflog_msg, "clone: from %s", repo);
919
920 if (option_bare)
921 work_tree = NULL;
922 else {
923 work_tree = getenv("GIT_WORK_TREE");
924 if (work_tree && !stat(work_tree, &buf))
925 die(_("working tree '%s' already exists."), work_tree);
926 }
927
928 if (option_bare || work_tree)
929 git_dir = xstrdup(dir);
930 else {
931 work_tree = dir;
932 git_dir = mkpathdup("%s/.git", dir);
933 }
934
935 atexit(remove_junk);
936 sigchain_push_common(remove_junk_on_signal);
937
938 if (!option_bare) {
939 if (safe_create_leading_directories_const(work_tree) < 0)
940 die_errno(_("could not create leading directories of '%s'"),
941 work_tree);
942 if (!dest_exists && mkdir(work_tree, 0777))
943 die_errno(_("could not create work tree dir '%s'"),
944 work_tree);
945 junk_work_tree = work_tree;
946 set_git_work_tree(work_tree);
947 }
948
949 junk_git_dir = real_git_dir ? real_git_dir : git_dir;
950 if (safe_create_leading_directories_const(git_dir) < 0)
951 die(_("could not create leading directories of '%s'"), git_dir);
952
953 if (0 <= option_verbosity) {
954 if (option_bare)
955 fprintf(stderr, _("Cloning into bare repository '%s'...\n"), dir);
956 else
957 fprintf(stderr, _("Cloning into '%s'...\n"), dir);
958 }
959
960 if (option_recursive) {
961 if (option_required_reference.nr &&
962 option_optional_reference.nr)
963 die(_("clone --recursive is not compatible with "
964 "both --reference and --reference-if-able"));
965 else if (option_required_reference.nr) {
966 string_list_append(&option_config,
967 "submodule.alternateLocation=superproject");
968 string_list_append(&option_config,
969 "submodule.alternateErrorStrategy=die");
970 } else if (option_optional_reference.nr) {
971 string_list_append(&option_config,
972 "submodule.alternateLocation=superproject");
973 string_list_append(&option_config,
974 "submodule.alternateErrorStrategy=info");
975 }
976 }
977
978 init_db(git_dir, real_git_dir, option_template, INIT_DB_QUIET);
979
980 if (real_git_dir)
981 git_dir = real_git_dir;
982
983 write_config(&option_config);
984
985 git_config(git_default_config, NULL);
986
987 if (option_bare) {
988 if (option_mirror)
989 src_ref_prefix = "refs/";
990 strbuf_addstr(&branch_top, src_ref_prefix);
991
992 git_config_set("core.bare", "true");
993 } else {
994 strbuf_addf(&branch_top, "refs/remotes/%s/", option_origin);
995 }
996
997 strbuf_addf(&value, "+%s*:%s*", src_ref_prefix, branch_top.buf);
998 strbuf_addf(&key, "remote.%s.url", option_origin);
999 git_config_set(key.buf, repo);
1000 strbuf_reset(&key);
1001
1002 if (option_required_reference.nr || option_optional_reference.nr)
1003 setup_reference();
1004
1005 fetch_pattern = value.buf;
1006 refspec = parse_fetch_refspec(1, &fetch_pattern);
1007
1008 strbuf_reset(&value);
1009
1010 remote = remote_get(option_origin);
1011 transport = transport_get(remote, remote->url[0]);
1012 transport_set_verbosity(transport, option_verbosity, option_progress);
1013 transport->family = family;
1014
1015 path = get_repo_path(remote->url[0], &is_bundle);
1016 is_local = option_local != 0 && path && !is_bundle;
1017 if (is_local) {
1018 if (option_depth)
1019 warning(_("--depth is ignored in local clones; use file:// instead."));
1020 if (option_since)
1021 warning(_("--shallow-since is ignored in local clones; use file:// instead."));
1022 if (option_not.nr)
1023 warning(_("--shallow-exclude is ignored in local clones; use file:// instead."));
1024 if (!access(mkpath("%s/shallow", path), F_OK)) {
1025 if (option_local > 0)
1026 warning(_("source repository is shallow, ignoring --local"));
1027 is_local = 0;
1028 }
1029 }
1030 if (option_local > 0 && !is_local)
1031 warning(_("--local is ignored"));
1032 transport->cloning = 1;
1033
1034 if (!transport->get_refs_list || (!is_local && !transport->fetch))
1035 die(_("Don't know how to clone %s"), transport->url);
1036
1037 transport_set_option(transport, TRANS_OPT_KEEP, "yes");
1038
1039 if (option_depth)
1040 transport_set_option(transport, TRANS_OPT_DEPTH,
1041 option_depth);
1042 if (option_since)
1043 transport_set_option(transport, TRANS_OPT_DEEPEN_SINCE,
1044 option_since);
1045 if (option_not.nr)
1046 transport_set_option(transport, TRANS_OPT_DEEPEN_NOT,
1047 (const char *)&option_not);
1048 if (option_single_branch)
1049 transport_set_option(transport, TRANS_OPT_FOLLOWTAGS, "1");
1050
1051 if (option_upload_pack)
1052 transport_set_option(transport, TRANS_OPT_UPLOADPACK,
1053 option_upload_pack);
1054
1055 if (transport->smart_options && !deepen)
1056 transport->smart_options->check_self_contained_and_connected = 1;
1057
1058 refs = transport_get_remote_refs(transport);
1059
1060 if (refs) {
1061 mapped_refs = wanted_peer_refs(refs, refspec);
1062 /*
1063 * transport_get_remote_refs() may return refs with null sha-1
1064 * in mapped_refs (see struct transport->get_refs_list
1065 * comment). In that case we need fetch it early because
1066 * remote_head code below relies on it.
1067 *
1068 * for normal clones, transport_get_remote_refs() should
1069 * return reliable ref set, we can delay cloning until after
1070 * remote HEAD check.
1071 */
1072 for (ref = refs; ref; ref = ref->next)
1073 if (is_null_oid(&ref->old_oid)) {
1074 complete_refs_before_fetch = 0;
1075 break;
1076 }
1077
1078 if (!is_local && !complete_refs_before_fetch)
1079 transport_fetch_refs(transport, mapped_refs);
1080
1081 remote_head = find_ref_by_name(refs, "HEAD");
1082 remote_head_points_at =
1083 guess_remote_head(remote_head, mapped_refs, 0);
1084
1085 if (option_branch) {
1086 our_head_points_at =
1087 find_remote_branch(mapped_refs, option_branch);
1088
1089 if (!our_head_points_at)
1090 die(_("Remote branch %s not found in upstream %s"),
1091 option_branch, option_origin);
1092 }
1093 else
1094 our_head_points_at = remote_head_points_at;
1095 }
1096 else {
1097 if (option_branch)
1098 die(_("Remote branch %s not found in upstream %s"),
1099 option_branch, option_origin);
1100
1101 warning(_("You appear to have cloned an empty repository."));
1102 mapped_refs = NULL;
1103 our_head_points_at = NULL;
1104 remote_head_points_at = NULL;
1105 remote_head = NULL;
1106 option_no_checkout = 1;
1107 if (!option_bare)
1108 install_branch_config(0, "master", option_origin,
1109 "refs/heads/master");
1110 }
1111
1112 write_refspec_config(src_ref_prefix, our_head_points_at,
1113 remote_head_points_at, &branch_top);
1114
1115 if (is_local)
1116 clone_local(path, git_dir);
1117 else if (refs && complete_refs_before_fetch)
1118 transport_fetch_refs(transport, mapped_refs);
1119
1120 update_remote_refs(refs, mapped_refs, remote_head_points_at,
1121 branch_top.buf, reflog_msg.buf, transport, !is_local);
1122
1123 update_head(our_head_points_at, remote_head, reflog_msg.buf);
1124
1125 /*
1126 * We want to show progress for recursive submodule clones iff
1127 * we did so for the main clone. But only the transport knows
1128 * the final decision for this flag, so we need to rescue the value
1129 * before we free the transport.
1130 */
1131 submodule_progress = transport->progress;
1132
1133 transport_unlock_pack(transport);
1134 transport_disconnect(transport);
1135
1136 if (option_dissociate) {
1137 close_all_packs();
1138 dissociate_from_references();
1139 }
1140
1141 junk_mode = JUNK_LEAVE_REPO;
1142 err = checkout(submodule_progress);
1143
1144 strbuf_release(&reflog_msg);
1145 strbuf_release(&branch_top);
1146 strbuf_release(&key);
1147 strbuf_release(&value);
1148 junk_mode = JUNK_LEAVE_ALL;
1149
1150 free(refspec);
1151 return err;
1152 }