Remove deprecated OPTION_BOOLEAN for parsing arguments
[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 "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"
26
27 /*
28 * Overall FIXMEs:
29 * - respect DB_ENVIRONMENT for .git/objects.
30 *
31 * Implementation notes:
32 * - dropping use-separate-remote and no-separate-remote compatibility
33 *
34 */
35 static const char * const builtin_clone_usage[] = {
36 N_("git clone [options] [--] <repo> [<dir>]"),
37 NULL
38 };
39
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;
51
52 static int opt_parse_reference(const struct option *opt, const char *arg, int unset)
53 {
54 struct string_list *option_reference = opt->value;
55 if (!arg)
56 return -1;
57 string_list_append(option_reference, arg);
58 return 0;
59 }
60
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_BOOL(0, "bare", &option_bare, N_("create a bare repository")),
68 OPT_HIDDEN_BOOL(0, "naked", &option_bare,
69 N_("create a bare repository")),
70 OPT_BOOLEAN(0, "mirror", &option_mirror,
71 N_("create a mirror repository (implies bare)")),
72 OPT_BOOL('l', "local", &option_local,
73 N_("to clone from a local repository")),
74 OPT_BOOLEAN(0, "no-hardlinks", &option_no_hardlinks,
75 N_("don't use local hardlinks, always copy")),
76 OPT_BOOLEAN('s', "shared", &option_shared,
77 N_("setup as shared repository")),
78 OPT_BOOLEAN(0, "recursive", &option_recursive,
79 N_("initialize submodules in the clone")),
80 OPT_BOOLEAN(0, "recurse-submodules", &option_recursive,
81 N_("initialize submodules in the clone")),
82 OPT_STRING(0, "template", &option_template, N_("template-directory"),
83 N_("directory from which templates will be used")),
84 OPT_CALLBACK(0 , "reference", &option_reference, N_("repo"),
85 N_("reference repository"), &opt_parse_reference),
86 OPT_STRING('o', "origin", &option_origin, N_("name"),
87 N_("use <name> instead of 'origin' to track upstream")),
88 OPT_STRING('b', "branch", &option_branch, N_("branch"),
89 N_("checkout <branch> instead of the remote's HEAD")),
90 OPT_STRING('u', "upload-pack", &option_upload_pack, N_("path"),
91 N_("path to git-upload-pack on the remote")),
92 OPT_STRING(0, "depth", &option_depth, N_("depth"),
93 N_("create a shallow clone of that depth")),
94 OPT_BOOL(0, "single-branch", &option_single_branch,
95 N_("clone only one branch, HEAD or --branch")),
96 OPT_STRING(0, "separate-git-dir", &real_git_dir, N_("gitdir"),
97 N_("separate git dir from working tree")),
98 OPT_STRING_LIST('c', "config", &option_config, N_("key=value"),
99 N_("set config inside the new repository")),
100 OPT_END()
101 };
102
103 static const char *argv_submodule[] = {
104 "submodule", "update", "--init", "--recursive", NULL
105 };
106
107 static char *get_repo_path(const char *repo, int *is_bundle)
108 {
109 static char *suffix[] = { "/.git", "", ".git/.git", ".git" };
110 static char *bundle_suffix[] = { ".bundle", "" };
111 struct stat st;
112 int i;
113
114 for (i = 0; i < ARRAY_SIZE(suffix); i++) {
115 const char *path;
116 path = mkpath("%s%s", repo, suffix[i]);
117 if (stat(path, &st))
118 continue;
119 if (S_ISDIR(st.st_mode) && is_git_directory(path)) {
120 *is_bundle = 0;
121 return xstrdup(absolute_path(path));
122 } else if (S_ISREG(st.st_mode) && st.st_size > 8) {
123 /* Is it a "gitfile"? */
124 char signature[8];
125 int len, fd = open(path, O_RDONLY);
126 if (fd < 0)
127 continue;
128 len = read_in_full(fd, signature, 8);
129 close(fd);
130 if (len != 8 || strncmp(signature, "gitdir: ", 8))
131 continue;
132 path = read_gitfile(path);
133 if (path) {
134 *is_bundle = 0;
135 return xstrdup(absolute_path(path));
136 }
137 }
138 }
139
140 for (i = 0; i < ARRAY_SIZE(bundle_suffix); i++) {
141 const char *path;
142 path = mkpath("%s%s", repo, bundle_suffix[i]);
143 if (!stat(path, &st) && S_ISREG(st.st_mode)) {
144 *is_bundle = 1;
145 return xstrdup(absolute_path(path));
146 }
147 }
148
149 return NULL;
150 }
151
152 static char *guess_dir_name(const char *repo, int is_bundle, int is_bare)
153 {
154 const char *end = repo + strlen(repo), *start;
155 char *dir;
156
157 /*
158 * Strip trailing spaces, slashes and /.git
159 */
160 while (repo < end && (is_dir_sep(end[-1]) || isspace(end[-1])))
161 end--;
162 if (end - repo > 5 && is_dir_sep(end[-5]) &&
163 !strncmp(end - 4, ".git", 4)) {
164 end -= 5;
165 while (repo < end && is_dir_sep(end[-1]))
166 end--;
167 }
168
169 /*
170 * Find last component, but be prepared that repo could have
171 * the form "remote.example.com:foo.git", i.e. no slash
172 * in the directory part.
173 */
174 start = end;
175 while (repo < start && !is_dir_sep(start[-1]) && start[-1] != ':')
176 start--;
177
178 /*
179 * Strip .{bundle,git}.
180 */
181 if (is_bundle) {
182 if (end - start > 7 && !strncmp(end - 7, ".bundle", 7))
183 end -= 7;
184 } else {
185 if (end - start > 4 && !strncmp(end - 4, ".git", 4))
186 end -= 4;
187 }
188
189 if (is_bare) {
190 struct strbuf result = STRBUF_INIT;
191 strbuf_addf(&result, "%.*s.git", (int)(end - start), start);
192 dir = strbuf_detach(&result, NULL);
193 } else
194 dir = xstrndup(start, end - start);
195 /*
196 * Replace sequences of 'control' characters and whitespace
197 * with one ascii space, remove leading and trailing spaces.
198 */
199 if (*dir) {
200 char *out = dir;
201 int prev_space = 1 /* strip leading whitespace */;
202 for (end = dir; *end; ++end) {
203 char ch = *end;
204 if ((unsigned char)ch < '\x20')
205 ch = '\x20';
206 if (isspace(ch)) {
207 if (prev_space)
208 continue;
209 prev_space = 1;
210 } else
211 prev_space = 0;
212 *out++ = ch;
213 }
214 *out = '\0';
215 if (out > dir && prev_space)
216 out[-1] = '\0';
217 }
218 return dir;
219 }
220
221 static void strip_trailing_slashes(char *dir)
222 {
223 char *end = dir + strlen(dir);
224
225 while (dir < end - 1 && is_dir_sep(end[-1]))
226 end--;
227 *end = '\0';
228 }
229
230 static int add_one_reference(struct string_list_item *item, void *cb_data)
231 {
232 char *ref_git;
233 const char *repo;
234 struct strbuf alternate = STRBUF_INIT;
235
236 /* Beware: read_gitfile(), real_path() and mkpath() return static buffer */
237 ref_git = xstrdup(real_path(item->string));
238
239 repo = read_gitfile(ref_git);
240 if (!repo)
241 repo = read_gitfile(mkpath("%s/.git", ref_git));
242 if (repo) {
243 free(ref_git);
244 ref_git = xstrdup(repo);
245 }
246
247 if (!repo && is_directory(mkpath("%s/.git/objects", ref_git))) {
248 char *ref_git_git = mkpathdup("%s/.git", ref_git);
249 free(ref_git);
250 ref_git = ref_git_git;
251 } else if (!is_directory(mkpath("%s/objects", ref_git)))
252 die(_("reference repository '%s' is not a local repository."),
253 item->string);
254
255 strbuf_addf(&alternate, "%s/objects", ref_git);
256 add_to_alternates_file(alternate.buf);
257 strbuf_release(&alternate);
258 free(ref_git);
259 return 0;
260 }
261
262 static void setup_reference(void)
263 {
264 for_each_string_list(&option_reference, add_one_reference, NULL);
265 }
266
267 static void copy_alternates(struct strbuf *src, struct strbuf *dst,
268 const char *src_repo)
269 {
270 /*
271 * Read from the source objects/info/alternates file
272 * and copy the entries to corresponding file in the
273 * destination repository with add_to_alternates_file().
274 * Both src and dst have "$path/objects/info/alternates".
275 *
276 * Instead of copying bit-for-bit from the original,
277 * we need to append to existing one so that the already
278 * created entry via "clone -s" is not lost, and also
279 * to turn entries with paths relative to the original
280 * absolute, so that they can be used in the new repository.
281 */
282 FILE *in = fopen(src->buf, "r");
283 struct strbuf line = STRBUF_INIT;
284
285 while (strbuf_getline(&line, in, '\n') != EOF) {
286 char *abs_path, abs_buf[PATH_MAX];
287 if (!line.len || line.buf[0] == '#')
288 continue;
289 if (is_absolute_path(line.buf)) {
290 add_to_alternates_file(line.buf);
291 continue;
292 }
293 abs_path = mkpath("%s/objects/%s", src_repo, line.buf);
294 normalize_path_copy(abs_buf, abs_path);
295 add_to_alternates_file(abs_buf);
296 }
297 strbuf_release(&line);
298 fclose(in);
299 }
300
301 static void copy_or_link_directory(struct strbuf *src, struct strbuf *dest,
302 const char *src_repo, int src_baselen)
303 {
304 struct dirent *de;
305 struct stat buf;
306 int src_len, dest_len;
307 DIR *dir;
308
309 dir = opendir(src->buf);
310 if (!dir)
311 die_errno(_("failed to open '%s'"), src->buf);
312
313 if (mkdir(dest->buf, 0777)) {
314 if (errno != EEXIST)
315 die_errno(_("failed to create directory '%s'"), dest->buf);
316 else if (stat(dest->buf, &buf))
317 die_errno(_("failed to stat '%s'"), dest->buf);
318 else if (!S_ISDIR(buf.st_mode))
319 die(_("%s exists and is not a directory"), dest->buf);
320 }
321
322 strbuf_addch(src, '/');
323 src_len = src->len;
324 strbuf_addch(dest, '/');
325 dest_len = dest->len;
326
327 while ((de = readdir(dir)) != NULL) {
328 strbuf_setlen(src, src_len);
329 strbuf_addstr(src, de->d_name);
330 strbuf_setlen(dest, dest_len);
331 strbuf_addstr(dest, de->d_name);
332 if (stat(src->buf, &buf)) {
333 warning (_("failed to stat %s\n"), src->buf);
334 continue;
335 }
336 if (S_ISDIR(buf.st_mode)) {
337 if (de->d_name[0] != '.')
338 copy_or_link_directory(src, dest,
339 src_repo, src_baselen);
340 continue;
341 }
342
343 /* Files that cannot be copied bit-for-bit... */
344 if (!strcmp(src->buf + src_baselen, "/info/alternates")) {
345 copy_alternates(src, dest, src_repo);
346 continue;
347 }
348
349 if (unlink(dest->buf) && errno != ENOENT)
350 die_errno(_("failed to unlink '%s'"), dest->buf);
351 if (!option_no_hardlinks) {
352 if (!link(src->buf, dest->buf))
353 continue;
354 if (option_local > 0)
355 die_errno(_("failed to create link '%s'"), dest->buf);
356 option_no_hardlinks = 1;
357 }
358 if (copy_file_with_time(dest->buf, src->buf, 0666))
359 die_errno(_("failed to copy file to '%s'"), dest->buf);
360 }
361 closedir(dir);
362 }
363
364 static void clone_local(const char *src_repo, const char *dest_repo)
365 {
366 if (option_shared) {
367 struct strbuf alt = STRBUF_INIT;
368 strbuf_addf(&alt, "%s/objects", src_repo);
369 add_to_alternates_file(alt.buf);
370 strbuf_release(&alt);
371 } else {
372 struct strbuf src = STRBUF_INIT;
373 struct strbuf dest = STRBUF_INIT;
374 strbuf_addf(&src, "%s/objects", src_repo);
375 strbuf_addf(&dest, "%s/objects", dest_repo);
376 copy_or_link_directory(&src, &dest, src_repo, src.len);
377 strbuf_release(&src);
378 strbuf_release(&dest);
379 }
380
381 if (0 <= option_verbosity)
382 printf(_("done.\n"));
383 }
384
385 static const char *junk_work_tree;
386 static const char *junk_git_dir;
387 static pid_t junk_pid;
388 static enum {
389 JUNK_LEAVE_NONE,
390 JUNK_LEAVE_REPO,
391 JUNK_LEAVE_ALL
392 } junk_mode = JUNK_LEAVE_NONE;
393
394 static const char junk_leave_repo_msg[] =
395 N_("Clone succeeded, but checkout failed.\n"
396 "You can inspect what was checked out with 'git status'\n"
397 "and retry the checkout with 'git checkout -f HEAD'\n");
398
399 static void remove_junk(void)
400 {
401 struct strbuf sb = STRBUF_INIT;
402
403 switch (junk_mode) {
404 case JUNK_LEAVE_REPO:
405 warning("%s", _(junk_leave_repo_msg));
406 /* fall-through */
407 case JUNK_LEAVE_ALL:
408 return;
409 default:
410 /* proceed to removal */
411 break;
412 }
413
414 if (getpid() != junk_pid)
415 return;
416 if (junk_git_dir) {
417 strbuf_addstr(&sb, junk_git_dir);
418 remove_dir_recursively(&sb, 0);
419 strbuf_reset(&sb);
420 }
421 if (junk_work_tree) {
422 strbuf_addstr(&sb, junk_work_tree);
423 remove_dir_recursively(&sb, 0);
424 strbuf_reset(&sb);
425 }
426 }
427
428 static void remove_junk_on_signal(int signo)
429 {
430 remove_junk();
431 sigchain_pop(signo);
432 raise(signo);
433 }
434
435 static struct ref *find_remote_branch(const struct ref *refs, const char *branch)
436 {
437 struct ref *ref;
438 struct strbuf head = STRBUF_INIT;
439 strbuf_addstr(&head, "refs/heads/");
440 strbuf_addstr(&head, branch);
441 ref = find_ref_by_name(refs, head.buf);
442 strbuf_release(&head);
443
444 if (ref)
445 return ref;
446
447 strbuf_addstr(&head, "refs/tags/");
448 strbuf_addstr(&head, branch);
449 ref = find_ref_by_name(refs, head.buf);
450 strbuf_release(&head);
451
452 return ref;
453 }
454
455 static struct ref *wanted_peer_refs(const struct ref *refs,
456 struct refspec *refspec)
457 {
458 struct ref *head = copy_ref(find_ref_by_name(refs, "HEAD"));
459 struct ref *local_refs = head;
460 struct ref **tail = head ? &head->next : &local_refs;
461
462 if (option_single_branch) {
463 struct ref *remote_head = NULL;
464
465 if (!option_branch)
466 remote_head = guess_remote_head(head, refs, 0);
467 else {
468 local_refs = NULL;
469 tail = &local_refs;
470 remote_head = copy_ref(find_remote_branch(refs, option_branch));
471 }
472
473 if (!remote_head && option_branch)
474 warning(_("Could not find remote branch %s to clone."),
475 option_branch);
476 else {
477 get_fetch_map(remote_head, refspec, &tail, 0);
478
479 /* if --branch=tag, pull the requested tag explicitly */
480 get_fetch_map(remote_head, tag_refspec, &tail, 0);
481 }
482 } else
483 get_fetch_map(refs, refspec, &tail, 0);
484
485 if (!option_mirror && !option_single_branch)
486 get_fetch_map(refs, tag_refspec, &tail, 0);
487
488 return local_refs;
489 }
490
491 static void write_remote_refs(const struct ref *local_refs)
492 {
493 const struct ref *r;
494
495 lock_packed_refs(LOCK_DIE_ON_ERROR);
496
497 for (r = local_refs; r; r = r->next) {
498 if (!r->peer_ref)
499 continue;
500 add_packed_ref(r->peer_ref->name, r->old_sha1);
501 }
502
503 if (commit_packed_refs())
504 die_errno("unable to overwrite old ref-pack file");
505 }
506
507 static void write_followtags(const struct ref *refs, const char *msg)
508 {
509 const struct ref *ref;
510 for (ref = refs; ref; ref = ref->next) {
511 if (prefixcmp(ref->name, "refs/tags/"))
512 continue;
513 if (!suffixcmp(ref->name, "^{}"))
514 continue;
515 if (!has_sha1_file(ref->old_sha1))
516 continue;
517 update_ref(msg, ref->name, ref->old_sha1,
518 NULL, 0, DIE_ON_ERR);
519 }
520 }
521
522 static int iterate_ref_map(void *cb_data, unsigned char sha1[20])
523 {
524 struct ref **rm = cb_data;
525 struct ref *ref = *rm;
526
527 /*
528 * Skip anything missing a peer_ref, which we are not
529 * actually going to write a ref for.
530 */
531 while (ref && !ref->peer_ref)
532 ref = ref->next;
533 /* Returning -1 notes "end of list" to the caller. */
534 if (!ref)
535 return -1;
536
537 hashcpy(sha1, ref->old_sha1);
538 *rm = ref->next;
539 return 0;
540 }
541
542 static void update_remote_refs(const struct ref *refs,
543 const struct ref *mapped_refs,
544 const struct ref *remote_head_points_at,
545 const char *branch_top,
546 const char *msg,
547 struct transport *transport,
548 int check_connectivity)
549 {
550 const struct ref *rm = mapped_refs;
551
552 if (check_connectivity) {
553 if (0 <= option_verbosity)
554 printf(_("Checking connectivity... "));
555 if (check_everything_connected_with_transport(iterate_ref_map,
556 0, &rm, transport))
557 die(_("remote did not send all necessary objects"));
558 if (0 <= option_verbosity)
559 printf(_("done\n"));
560 }
561
562 if (refs) {
563 write_remote_refs(mapped_refs);
564 if (option_single_branch)
565 write_followtags(refs, msg);
566 }
567
568 if (remote_head_points_at && !option_bare) {
569 struct strbuf head_ref = STRBUF_INIT;
570 strbuf_addstr(&head_ref, branch_top);
571 strbuf_addstr(&head_ref, "HEAD");
572 create_symref(head_ref.buf,
573 remote_head_points_at->peer_ref->name,
574 msg);
575 }
576 }
577
578 static void update_head(const struct ref *our, const struct ref *remote,
579 const char *msg)
580 {
581 if (our && !prefixcmp(our->name, "refs/heads/")) {
582 /* Local default branch link */
583 create_symref("HEAD", our->name, NULL);
584 if (!option_bare) {
585 const char *head = skip_prefix(our->name, "refs/heads/");
586 update_ref(msg, "HEAD", our->old_sha1, NULL, 0, DIE_ON_ERR);
587 install_branch_config(0, head, option_origin, our->name);
588 }
589 } else if (our) {
590 struct commit *c = lookup_commit_reference(our->old_sha1);
591 /* --branch specifies a non-branch (i.e. tags), detach HEAD */
592 update_ref(msg, "HEAD", c->object.sha1,
593 NULL, REF_NODEREF, DIE_ON_ERR);
594 } else if (remote) {
595 /*
596 * We know remote HEAD points to a non-branch, or
597 * HEAD points to a branch but we don't know which one.
598 * Detach HEAD in all these cases.
599 */
600 update_ref(msg, "HEAD", remote->old_sha1,
601 NULL, REF_NODEREF, DIE_ON_ERR);
602 }
603 }
604
605 static int checkout(void)
606 {
607 unsigned char sha1[20];
608 char *head;
609 struct lock_file *lock_file;
610 struct unpack_trees_options opts;
611 struct tree *tree;
612 struct tree_desc t;
613 int err = 0, fd;
614
615 if (option_no_checkout)
616 return 0;
617
618 head = resolve_refdup("HEAD", sha1, 1, NULL);
619 if (!head) {
620 warning(_("remote HEAD refers to nonexistent ref, "
621 "unable to checkout.\n"));
622 return 0;
623 }
624 if (!strcmp(head, "HEAD")) {
625 if (advice_detached_head)
626 detach_advice(sha1_to_hex(sha1));
627 } else {
628 if (prefixcmp(head, "refs/heads/"))
629 die(_("HEAD not found below refs/heads!"));
630 }
631 free(head);
632
633 /* We need to be in the new work tree for the checkout */
634 setup_work_tree();
635
636 lock_file = xcalloc(1, sizeof(struct lock_file));
637 fd = hold_locked_index(lock_file, 1);
638
639 memset(&opts, 0, sizeof opts);
640 opts.update = 1;
641 opts.merge = 1;
642 opts.fn = oneway_merge;
643 opts.verbose_update = (option_verbosity >= 0);
644 opts.src_index = &the_index;
645 opts.dst_index = &the_index;
646
647 tree = parse_tree_indirect(sha1);
648 parse_tree(tree);
649 init_tree_desc(&t, tree->buffer, tree->size);
650 if (unpack_trees(1, &t, &opts) < 0)
651 die(_("unable to checkout working tree"));
652
653 if (write_cache(fd, active_cache, active_nr) ||
654 commit_locked_index(lock_file))
655 die(_("unable to write new index file"));
656
657 err |= run_hook(NULL, "post-checkout", sha1_to_hex(null_sha1),
658 sha1_to_hex(sha1), "1", NULL);
659
660 if (!err && option_recursive)
661 err = run_command_v_opt(argv_submodule, RUN_GIT_CMD);
662
663 return err;
664 }
665
666 static int write_one_config(const char *key, const char *value, void *data)
667 {
668 return git_config_set_multivar(key, value ? value : "true", "^$", 0);
669 }
670
671 static void write_config(struct string_list *config)
672 {
673 int i;
674
675 for (i = 0; i < config->nr; i++) {
676 if (git_config_parse_parameter(config->items[i].string,
677 write_one_config, NULL) < 0)
678 die("unable to write parameters to config file");
679 }
680 }
681
682 static void write_refspec_config(const char* src_ref_prefix,
683 const struct ref* our_head_points_at,
684 const struct ref* remote_head_points_at, struct strbuf* branch_top)
685 {
686 struct strbuf key = STRBUF_INIT;
687 struct strbuf value = STRBUF_INIT;
688
689 if (option_mirror || !option_bare) {
690 if (option_single_branch && !option_mirror) {
691 if (option_branch) {
692 if (strstr(our_head_points_at->name, "refs/tags/"))
693 strbuf_addf(&value, "+%s:%s", our_head_points_at->name,
694 our_head_points_at->name);
695 else
696 strbuf_addf(&value, "+%s:%s%s", our_head_points_at->name,
697 branch_top->buf, option_branch);
698 } else if (remote_head_points_at) {
699 strbuf_addf(&value, "+%s:%s%s", remote_head_points_at->name,
700 branch_top->buf,
701 skip_prefix(remote_head_points_at->name, "refs/heads/"));
702 }
703 /*
704 * otherwise, the next "git fetch" will
705 * simply fetch from HEAD without updating
706 * any remote-tracking branch, which is what
707 * we want.
708 */
709 } else {
710 strbuf_addf(&value, "+%s*:%s*", src_ref_prefix, branch_top->buf);
711 }
712 /* Configure the remote */
713 if (value.len) {
714 strbuf_addf(&key, "remote.%s.fetch", option_origin);
715 git_config_set_multivar(key.buf, value.buf, "^$", 0);
716 strbuf_reset(&key);
717
718 if (option_mirror) {
719 strbuf_addf(&key, "remote.%s.mirror", option_origin);
720 git_config_set(key.buf, "true");
721 strbuf_reset(&key);
722 }
723 }
724 }
725
726 strbuf_release(&key);
727 strbuf_release(&value);
728 }
729
730 int cmd_clone(int argc, const char **argv, const char *prefix)
731 {
732 int is_bundle = 0, is_local;
733 struct stat buf;
734 const char *repo_name, *repo, *work_tree, *git_dir;
735 char *path, *dir;
736 int dest_exists;
737 const struct ref *refs, *remote_head;
738 const struct ref *remote_head_points_at;
739 const struct ref *our_head_points_at;
740 struct ref *mapped_refs;
741 const struct ref *ref;
742 struct strbuf key = STRBUF_INIT, value = STRBUF_INIT;
743 struct strbuf branch_top = STRBUF_INIT, reflog_msg = STRBUF_INIT;
744 struct transport *transport = NULL;
745 const char *src_ref_prefix = "refs/heads/";
746 struct remote *remote;
747 int err = 0, complete_refs_before_fetch = 1;
748
749 struct refspec *refspec;
750 const char *fetch_pattern;
751
752 junk_pid = getpid();
753
754 packet_trace_identity("clone");
755 argc = parse_options(argc, argv, prefix, builtin_clone_options,
756 builtin_clone_usage, 0);
757
758 if (argc > 2)
759 usage_msg_opt(_("Too many arguments."),
760 builtin_clone_usage, builtin_clone_options);
761
762 if (argc == 0)
763 usage_msg_opt(_("You must specify a repository to clone."),
764 builtin_clone_usage, builtin_clone_options);
765
766 if (option_single_branch == -1)
767 option_single_branch = option_depth ? 1 : 0;
768
769 if (option_mirror)
770 option_bare = 1;
771
772 if (option_bare) {
773 if (option_origin)
774 die(_("--bare and --origin %s options are incompatible."),
775 option_origin);
776 if (real_git_dir)
777 die(_("--bare and --separate-git-dir are incompatible."));
778 option_no_checkout = 1;
779 }
780
781 if (!option_origin)
782 option_origin = "origin";
783
784 repo_name = argv[0];
785
786 path = get_repo_path(repo_name, &is_bundle);
787 if (path)
788 repo = xstrdup(absolute_path(repo_name));
789 else if (!strchr(repo_name, ':'))
790 die(_("repository '%s' does not exist"), repo_name);
791 else
792 repo = repo_name;
793 is_local = option_local != 0 && path && !is_bundle;
794 if (is_local && option_depth)
795 warning(_("--depth is ignored in local clones; use file:// instead."));
796 if (option_local > 0 && !is_local)
797 warning(_("--local is ignored"));
798
799 if (argc == 2)
800 dir = xstrdup(argv[1]);
801 else
802 dir = guess_dir_name(repo_name, is_bundle, option_bare);
803 strip_trailing_slashes(dir);
804
805 dest_exists = !stat(dir, &buf);
806 if (dest_exists && !is_empty_dir(dir))
807 die(_("destination path '%s' already exists and is not "
808 "an empty directory."), dir);
809
810 strbuf_addf(&reflog_msg, "clone: from %s", repo);
811
812 if (option_bare)
813 work_tree = NULL;
814 else {
815 work_tree = getenv("GIT_WORK_TREE");
816 if (work_tree && !stat(work_tree, &buf))
817 die(_("working tree '%s' already exists."), work_tree);
818 }
819
820 if (option_bare || work_tree)
821 git_dir = xstrdup(dir);
822 else {
823 work_tree = dir;
824 git_dir = mkpathdup("%s/.git", dir);
825 }
826
827 if (!option_bare) {
828 junk_work_tree = work_tree;
829 if (safe_create_leading_directories_const(work_tree) < 0)
830 die_errno(_("could not create leading directories of '%s'"),
831 work_tree);
832 if (!dest_exists && mkdir(work_tree, 0777))
833 die_errno(_("could not create work tree dir '%s'."),
834 work_tree);
835 set_git_work_tree(work_tree);
836 }
837 junk_git_dir = git_dir;
838 atexit(remove_junk);
839 sigchain_push_common(remove_junk_on_signal);
840
841 if (safe_create_leading_directories_const(git_dir) < 0)
842 die(_("could not create leading directories of '%s'"), git_dir);
843
844 set_git_dir_init(git_dir, real_git_dir, 0);
845 if (real_git_dir) {
846 git_dir = real_git_dir;
847 junk_git_dir = real_git_dir;
848 }
849
850 if (0 <= option_verbosity) {
851 if (option_bare)
852 printf(_("Cloning into bare repository '%s'...\n"), dir);
853 else
854 printf(_("Cloning into '%s'...\n"), dir);
855 }
856 init_db(option_template, INIT_DB_QUIET);
857 write_config(&option_config);
858
859 git_config(git_default_config, NULL);
860
861 if (option_bare) {
862 if (option_mirror)
863 src_ref_prefix = "refs/";
864 strbuf_addstr(&branch_top, src_ref_prefix);
865
866 git_config_set("core.bare", "true");
867 } else {
868 strbuf_addf(&branch_top, "refs/remotes/%s/", option_origin);
869 }
870
871 strbuf_addf(&value, "+%s*:%s*", src_ref_prefix, branch_top.buf);
872 strbuf_addf(&key, "remote.%s.url", option_origin);
873 git_config_set(key.buf, repo);
874 strbuf_reset(&key);
875
876 if (option_reference.nr)
877 setup_reference();
878
879 fetch_pattern = value.buf;
880 refspec = parse_fetch_refspec(1, &fetch_pattern);
881
882 strbuf_reset(&value);
883
884 remote = remote_get(option_origin);
885 transport = transport_get(remote, remote->url[0]);
886
887 if (!is_local) {
888 if (!transport->get_refs_list || !transport->fetch)
889 die(_("Don't know how to clone %s"), transport->url);
890
891 transport_set_option(transport, TRANS_OPT_KEEP, "yes");
892
893 if (option_depth)
894 transport_set_option(transport, TRANS_OPT_DEPTH,
895 option_depth);
896 if (option_single_branch)
897 transport_set_option(transport, TRANS_OPT_FOLLOWTAGS, "1");
898
899 transport_set_verbosity(transport, option_verbosity, option_progress);
900
901 if (option_upload_pack)
902 transport_set_option(transport, TRANS_OPT_UPLOADPACK,
903 option_upload_pack);
904
905 if (transport->smart_options && !option_depth)
906 transport->smart_options->check_self_contained_and_connected = 1;
907 }
908
909 refs = transport_get_remote_refs(transport);
910
911 if (refs) {
912 mapped_refs = wanted_peer_refs(refs, refspec);
913 /*
914 * transport_get_remote_refs() may return refs with null sha-1
915 * in mapped_refs (see struct transport->get_refs_list
916 * comment). In that case we need fetch it early because
917 * remote_head code below relies on it.
918 *
919 * for normal clones, transport_get_remote_refs() should
920 * return reliable ref set, we can delay cloning until after
921 * remote HEAD check.
922 */
923 for (ref = refs; ref; ref = ref->next)
924 if (is_null_sha1(ref->old_sha1)) {
925 complete_refs_before_fetch = 0;
926 break;
927 }
928
929 if (!is_local && !complete_refs_before_fetch)
930 transport_fetch_refs(transport, mapped_refs);
931
932 remote_head = find_ref_by_name(refs, "HEAD");
933 remote_head_points_at =
934 guess_remote_head(remote_head, mapped_refs, 0);
935
936 if (option_branch) {
937 our_head_points_at =
938 find_remote_branch(mapped_refs, option_branch);
939
940 if (!our_head_points_at)
941 die(_("Remote branch %s not found in upstream %s"),
942 option_branch, option_origin);
943 }
944 else
945 our_head_points_at = remote_head_points_at;
946 }
947 else {
948 warning(_("You appear to have cloned an empty repository."));
949 mapped_refs = NULL;
950 our_head_points_at = NULL;
951 remote_head_points_at = NULL;
952 remote_head = NULL;
953 option_no_checkout = 1;
954 if (!option_bare)
955 install_branch_config(0, "master", option_origin,
956 "refs/heads/master");
957 }
958
959 write_refspec_config(src_ref_prefix, our_head_points_at,
960 remote_head_points_at, &branch_top);
961
962 if (is_local)
963 clone_local(path, git_dir);
964 else if (refs && complete_refs_before_fetch)
965 transport_fetch_refs(transport, mapped_refs);
966
967 update_remote_refs(refs, mapped_refs, remote_head_points_at,
968 branch_top.buf, reflog_msg.buf, transport, !is_local);
969
970 update_head(our_head_points_at, remote_head, reflog_msg.buf);
971
972 transport_unlock_pack(transport);
973 transport_disconnect(transport);
974
975 junk_mode = JUNK_LEAVE_REPO;
976 err = checkout();
977
978 strbuf_release(&reflog_msg);
979 strbuf_release(&branch_top);
980 strbuf_release(&key);
981 strbuf_release(&value);
982 junk_mode = JUNK_LEAVE_ALL;
983 return err;
984 }