Revert "MinGW: Add missing file mode bit defines"
[git/mingw/4msysgit/gitPS1fix.git] / builtin / clone.c
blobf579794d9a93a0e55289921f20b8f68b85211ca1
1 /*
2 * Builtin "git clone"
4 * Copyright (c) 2007 Kristian Høgsberg <krh@redhat.com>,
5 * 2008 Daniel Barkalow <barkalow@iabervon.org>
6 * Based on git-commit.sh by Junio C Hamano and Linus Torvalds
8 * Clone a repository into a different directory that does not yet exist.
9 */
11 #include "builtin.h"
12 #include "parse-options.h"
13 #include "fetch-pack.h"
14 #include "refs.h"
15 #include "tree.h"
16 #include "tree-walk.h"
17 #include "unpack-trees.h"
18 #include "transport.h"
19 #include "strbuf.h"
20 #include "dir.h"
21 #include "pack-refs.h"
22 #include "sigchain.h"
23 #include "branch.h"
24 #include "remote.h"
25 #include "run-command.h"
28 * Overall FIXMEs:
29 * - respect DB_ENVIRONMENT for .git/objects.
31 * Implementation notes:
32 * - dropping use-separate-remote and no-separate-remote compatibility
35 static const char * const builtin_clone_usage[] = {
36 "git clone [options] [--] <repo> [<dir>]",
37 NULL
40 static int option_no_checkout, option_bare, option_mirror;
41 static int option_local, option_no_hardlinks, option_shared, option_recursive;
42 static char *option_template, *option_reference, *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;
50 static struct option builtin_clone_options[] = {
51 OPT__VERBOSITY(&option_verbosity),
52 OPT_BOOLEAN(0, "progress", &option_progress,
53 "force progress reporting"),
54 OPT_BOOLEAN('n', "no-checkout", &option_no_checkout,
55 "don't create a checkout"),
56 OPT_BOOLEAN(0, "bare", &option_bare, "create a bare repository"),
57 { OPTION_BOOLEAN, 0, "naked", &option_bare, NULL,
58 "create a bare repository",
59 PARSE_OPT_NOARG | PARSE_OPT_HIDDEN },
60 OPT_BOOLEAN(0, "mirror", &option_mirror,
61 "create a mirror repository (implies bare)"),
62 OPT_BOOLEAN('l', "local", &option_local,
63 "to clone from a local repository"),
64 OPT_BOOLEAN(0, "no-hardlinks", &option_no_hardlinks,
65 "don't use local hardlinks, always copy"),
66 OPT_BOOLEAN('s', "shared", &option_shared,
67 "setup as shared repository"),
68 OPT_BOOLEAN(0, "recursive", &option_recursive,
69 "initialize submodules in the clone"),
70 OPT_BOOLEAN(0, "recurse-submodules", &option_recursive,
71 "initialize submodules in the clone"),
72 OPT_STRING(0, "template", &option_template, "template-directory",
73 "directory from which templates will be used"),
74 OPT_STRING(0, "reference", &option_reference, "repo",
75 "reference repository"),
76 OPT_STRING('o', "origin", &option_origin, "branch",
77 "use <branch> instead of 'origin' to track upstream"),
78 OPT_STRING('b', "branch", &option_branch, "branch",
79 "checkout <branch> instead of the remote's HEAD"),
80 OPT_STRING('u', "upload-pack", &option_upload_pack, "path",
81 "path to git-upload-pack on the remote"),
82 OPT_STRING(0, "depth", &option_depth, "depth",
83 "create a shallow clone of that depth"),
84 OPT_STRING(0, "separate-git-dir", &real_git_dir, "gitdir",
85 "separate git dir from working tree"),
87 OPT_END()
90 static const char *argv_submodule[] = {
91 "submodule", "update", "--init", "--recursive", NULL
94 static char *get_repo_path(const char *repo, int *is_bundle)
96 static char *suffix[] = { "/.git", ".git", "" };
97 static char *bundle_suffix[] = { ".bundle", "" };
98 struct stat st;
99 int i;
101 for (i = 0; i < ARRAY_SIZE(suffix); i++) {
102 const char *path;
103 path = mkpath("%s%s", repo, suffix[i]);
104 if (is_directory(path)) {
105 *is_bundle = 0;
106 return xstrdup(absolute_path(path));
110 for (i = 0; i < ARRAY_SIZE(bundle_suffix); i++) {
111 const char *path;
112 path = mkpath("%s%s", repo, bundle_suffix[i]);
113 if (!stat(path, &st) && S_ISREG(st.st_mode)) {
114 *is_bundle = 1;
115 return xstrdup(absolute_path(path));
119 return NULL;
122 static char *guess_dir_name(const char *repo, int is_bundle, int is_bare)
124 const char *end = repo + strlen(repo), *start;
125 char *dir;
128 * Strip trailing spaces, slashes and /.git
130 while (repo < end && (is_dir_sep(end[-1]) || isspace(end[-1])))
131 end--;
132 if (end - repo > 5 && is_dir_sep(end[-5]) &&
133 !strncmp(end - 4, ".git", 4)) {
134 end -= 5;
135 while (repo < end && is_dir_sep(end[-1]))
136 end--;
140 * Find last component, but be prepared that repo could have
141 * the form "remote.example.com:foo.git", i.e. no slash
142 * in the directory part.
144 start = end;
145 while (repo < start && !is_dir_sep(start[-1]) && start[-1] != ':')
146 start--;
149 * Strip .{bundle,git}.
151 if (is_bundle) {
152 if (end - start > 7 && !strncmp(end - 7, ".bundle", 7))
153 end -= 7;
154 } else {
155 if (end - start > 4 && !strncmp(end - 4, ".git", 4))
156 end -= 4;
159 if (is_bare) {
160 struct strbuf result = STRBUF_INIT;
161 strbuf_addf(&result, "%.*s.git", (int)(end - start), start);
162 dir = strbuf_detach(&result, NULL);
163 } else
164 dir = xstrndup(start, end - start);
166 * Replace sequences of 'control' characters and whitespace
167 * with one ascii space, remove leading and trailing spaces.
169 if (*dir) {
170 char *out = dir;
171 int prev_space = 1 /* strip leading whitespace */;
172 for (end = dir; *end; ++end) {
173 char ch = *end;
174 if ((unsigned char)ch < '\x20')
175 ch = '\x20';
176 if (isspace(ch)) {
177 if (prev_space)
178 continue;
179 prev_space = 1;
180 } else
181 prev_space = 0;
182 *out++ = ch;
184 *out = '\0';
185 if (out > dir && prev_space)
186 out[-1] = '\0';
188 return dir;
191 static void strip_trailing_slashes(char *dir)
193 char *end = dir + strlen(dir);
195 while (dir < end - 1 && is_dir_sep(end[-1]))
196 end--;
197 *end = '\0';
200 static void setup_reference(const char *repo)
202 const char *ref_git;
203 char *ref_git_copy;
205 struct remote *remote;
206 struct transport *transport;
207 const struct ref *extra;
209 ref_git = real_path(option_reference);
211 if (is_directory(mkpath("%s/.git/objects", ref_git)))
212 ref_git = mkpath("%s/.git", ref_git);
213 else if (!is_directory(mkpath("%s/objects", ref_git)))
214 die(_("reference repository '%s' is not a local directory."),
215 option_reference);
217 ref_git_copy = xstrdup(ref_git);
219 add_to_alternates_file(ref_git_copy);
221 remote = remote_get(ref_git_copy);
222 transport = transport_get(remote, ref_git_copy);
223 for (extra = transport_get_remote_refs(transport); extra;
224 extra = extra->next)
225 add_extra_ref(extra->name, extra->old_sha1, 0);
227 transport_disconnect(transport);
229 free(ref_git_copy);
232 static void copy_or_link_directory(struct strbuf *src, struct strbuf *dest)
234 struct dirent *de;
235 struct stat buf;
236 int src_len, dest_len;
237 DIR *dir;
239 dir = opendir(src->buf);
240 if (!dir)
241 die_errno(_("failed to open '%s'"), src->buf);
243 if (mkdir(dest->buf, 0777)) {
244 if (errno != EEXIST)
245 die_errno(_("failed to create directory '%s'"), dest->buf);
246 else if (stat(dest->buf, &buf))
247 die_errno(_("failed to stat '%s'"), dest->buf);
248 else if (!S_ISDIR(buf.st_mode))
249 die(_("%s exists and is not a directory"), dest->buf);
252 strbuf_addch(src, '/');
253 src_len = src->len;
254 strbuf_addch(dest, '/');
255 dest_len = dest->len;
257 while ((de = readdir(dir)) != NULL) {
258 strbuf_setlen(src, src_len);
259 strbuf_addstr(src, de->d_name);
260 strbuf_setlen(dest, dest_len);
261 strbuf_addstr(dest, de->d_name);
262 if (stat(src->buf, &buf)) {
263 warning (_("failed to stat %s\n"), src->buf);
264 continue;
266 if (S_ISDIR(buf.st_mode)) {
267 if (de->d_name[0] != '.')
268 copy_or_link_directory(src, dest);
269 continue;
272 if (unlink(dest->buf) && errno != ENOENT)
273 die_errno(_("failed to unlink '%s'"), dest->buf);
274 if (!option_no_hardlinks) {
275 if (!link(src->buf, dest->buf))
276 continue;
277 if (option_local)
278 die_errno(_("failed to create link '%s'"), dest->buf);
279 option_no_hardlinks = 1;
281 if (copy_file_with_time(dest->buf, src->buf, 0666))
282 die_errno(_("failed to copy file to '%s'"), dest->buf);
284 closedir(dir);
287 static const struct ref *clone_local(const char *src_repo,
288 const char *dest_repo)
290 const struct ref *ret;
291 struct strbuf src = STRBUF_INIT;
292 struct strbuf dest = STRBUF_INIT;
293 struct remote *remote;
294 struct transport *transport;
296 if (option_shared)
297 add_to_alternates_file(src_repo);
298 else {
299 strbuf_addf(&src, "%s/objects", src_repo);
300 strbuf_addf(&dest, "%s/objects", dest_repo);
301 copy_or_link_directory(&src, &dest);
302 strbuf_release(&src);
303 strbuf_release(&dest);
306 remote = remote_get(src_repo);
307 transport = transport_get(remote, src_repo);
308 ret = transport_get_remote_refs(transport);
309 transport_disconnect(transport);
310 if (0 <= option_verbosity)
311 printf(_("done.\n"));
312 return ret;
315 static const char *junk_work_tree;
316 static const char *junk_git_dir;
317 static pid_t junk_pid;
319 static void remove_junk(void)
321 struct strbuf sb = STRBUF_INIT;
322 if (getpid() != junk_pid)
323 return;
324 if (junk_git_dir) {
325 strbuf_addstr(&sb, junk_git_dir);
326 remove_dir_recursively(&sb, 0);
327 strbuf_reset(&sb);
329 if (junk_work_tree) {
330 strbuf_addstr(&sb, junk_work_tree);
331 remove_dir_recursively(&sb, 0);
332 strbuf_reset(&sb);
336 static void remove_junk_on_signal(int signo)
338 remove_junk();
339 sigchain_pop(signo);
340 raise(signo);
343 static struct ref *wanted_peer_refs(const struct ref *refs,
344 struct refspec *refspec)
346 struct ref *local_refs = NULL;
347 struct ref **tail = &local_refs;
349 get_fetch_map(refs, refspec, &tail, 0);
350 if (!option_mirror)
351 get_fetch_map(refs, tag_refspec, &tail, 0);
353 return local_refs;
356 static void write_remote_refs(const struct ref *local_refs)
358 const struct ref *r;
360 for (r = local_refs; r; r = r->next)
361 add_extra_ref(r->peer_ref->name, r->old_sha1, 0);
363 pack_refs(PACK_REFS_ALL);
364 clear_extra_refs();
367 int cmd_clone(int argc, const char **argv, const char *prefix)
369 int is_bundle = 0, is_local;
370 struct stat buf;
371 const char *repo_name, *repo, *work_tree, *git_dir;
372 char *path, *dir;
373 int dest_exists;
374 const struct ref *refs, *remote_head;
375 const struct ref *remote_head_points_at;
376 const struct ref *our_head_points_at;
377 struct ref *mapped_refs;
378 struct strbuf key = STRBUF_INIT, value = STRBUF_INIT;
379 struct strbuf branch_top = STRBUF_INIT, reflog_msg = STRBUF_INIT;
380 struct transport *transport = NULL;
381 char *src_ref_prefix = "refs/heads/";
382 int err = 0;
384 struct refspec *refspec;
385 const char *fetch_pattern;
387 junk_pid = getpid();
389 packet_trace_identity("clone");
390 argc = parse_options(argc, argv, prefix, builtin_clone_options,
391 builtin_clone_usage, 0);
393 if (argc > 2)
394 usage_msg_opt(_("Too many arguments."),
395 builtin_clone_usage, builtin_clone_options);
397 if (argc == 0)
398 usage_msg_opt(_("You must specify a repository to clone."),
399 builtin_clone_usage, builtin_clone_options);
401 if (option_mirror)
402 option_bare = 1;
404 if (option_bare) {
405 if (option_origin)
406 die(_("--bare and --origin %s options are incompatible."),
407 option_origin);
408 option_no_checkout = 1;
411 if (!option_origin)
412 option_origin = "origin";
414 repo_name = argv[0];
416 path = get_repo_path(repo_name, &is_bundle);
417 if (path)
418 repo = xstrdup(absolute_path(repo_name));
419 else if (!strchr(repo_name, ':'))
420 die(_("repository '%s' does not exist"), repo_name);
421 else
422 repo = repo_name;
423 is_local = path && !is_bundle;
424 if (is_local && option_depth)
425 warning(_("--depth is ignored in local clones; use file:// instead."));
427 if (argc == 2)
428 dir = xstrdup(argv[1]);
429 else
430 dir = guess_dir_name(repo_name, is_bundle, option_bare);
431 strip_trailing_slashes(dir);
433 dest_exists = !stat(dir, &buf);
434 if (dest_exists && !is_empty_dir(dir))
435 die(_("destination path '%s' already exists and is not "
436 "an empty directory."), dir);
438 strbuf_addf(&reflog_msg, "clone: from %s", repo);
440 if (option_bare)
441 work_tree = NULL;
442 else {
443 work_tree = getenv("GIT_WORK_TREE");
444 if (work_tree && !stat(work_tree, &buf))
445 die(_("working tree '%s' already exists."), work_tree);
448 if (option_bare || work_tree)
449 git_dir = xstrdup(dir);
450 else {
451 work_tree = dir;
452 git_dir = xstrdup(mkpath("%s/.git", dir));
455 if (!option_bare) {
456 junk_work_tree = work_tree;
457 if (safe_create_leading_directories_const(work_tree) < 0)
458 die_errno(_("could not create leading directories of '%s'"),
459 work_tree);
460 if (!dest_exists && mkdir(work_tree, 0755))
461 die_errno(_("could not create work tree dir '%s'."),
462 work_tree);
463 set_git_work_tree(work_tree);
465 junk_git_dir = git_dir;
466 atexit(remove_junk);
467 sigchain_push_common(remove_junk_on_signal);
469 setenv(CONFIG_ENVIRONMENT, mkpath("%s/config", git_dir), 1);
471 if (safe_create_leading_directories_const(git_dir) < 0)
472 die(_("could not create leading directories of '%s'"), git_dir);
474 set_git_dir_init(git_dir, real_git_dir, 0);
475 if (real_git_dir)
476 git_dir = real_git_dir;
478 if (0 <= option_verbosity) {
479 if (option_bare)
480 printf(_("Cloning into bare repository %s...\n"), dir);
481 else
482 printf(_("Cloning into %s...\n"), dir);
484 init_db(option_template, INIT_DB_QUIET);
487 * At this point, the config exists, so we do not need the
488 * environment variable. We actually need to unset it, too, to
489 * re-enable parsing of the global configs.
491 unsetenv(CONFIG_ENVIRONMENT);
493 git_config(git_default_config, NULL);
495 if (option_bare) {
496 if (option_mirror)
497 src_ref_prefix = "refs/";
498 strbuf_addstr(&branch_top, src_ref_prefix);
500 git_config_set("core.bare", "true");
501 } else {
502 strbuf_addf(&branch_top, "refs/remotes/%s/", option_origin);
505 strbuf_addf(&value, "+%s*:%s*", src_ref_prefix, branch_top.buf);
507 if (option_mirror || !option_bare) {
508 /* Configure the remote */
509 strbuf_addf(&key, "remote.%s.fetch", option_origin);
510 git_config_set_multivar(key.buf, value.buf, "^$", 0);
511 strbuf_reset(&key);
513 if (option_mirror) {
514 strbuf_addf(&key, "remote.%s.mirror", option_origin);
515 git_config_set(key.buf, "true");
516 strbuf_reset(&key);
520 strbuf_addf(&key, "remote.%s.url", option_origin);
521 git_config_set(key.buf, repo);
522 strbuf_reset(&key);
524 if (option_reference)
525 setup_reference(git_dir);
527 fetch_pattern = value.buf;
528 refspec = parse_fetch_refspec(1, &fetch_pattern);
530 strbuf_reset(&value);
532 if (is_local) {
533 refs = clone_local(path, git_dir);
534 mapped_refs = wanted_peer_refs(refs, refspec);
535 } else {
536 struct remote *remote = remote_get(option_origin);
537 transport = transport_get(remote, remote->url[0]);
539 if (!transport->get_refs_list || !transport->fetch)
540 die(_("Don't know how to clone %s"), transport->url);
542 transport_set_option(transport, TRANS_OPT_KEEP, "yes");
544 if (option_depth)
545 transport_set_option(transport, TRANS_OPT_DEPTH,
546 option_depth);
548 transport_set_verbosity(transport, option_verbosity, option_progress);
550 if (option_upload_pack)
551 transport_set_option(transport, TRANS_OPT_UPLOADPACK,
552 option_upload_pack);
554 refs = transport_get_remote_refs(transport);
555 if (refs) {
556 mapped_refs = wanted_peer_refs(refs, refspec);
557 transport_fetch_refs(transport, mapped_refs);
561 if (refs) {
562 clear_extra_refs();
564 write_remote_refs(mapped_refs);
566 remote_head = find_ref_by_name(refs, "HEAD");
567 remote_head_points_at =
568 guess_remote_head(remote_head, mapped_refs, 0);
570 if (option_branch) {
571 struct strbuf head = STRBUF_INIT;
572 strbuf_addstr(&head, src_ref_prefix);
573 strbuf_addstr(&head, option_branch);
574 our_head_points_at =
575 find_ref_by_name(mapped_refs, head.buf);
576 strbuf_release(&head);
578 if (!our_head_points_at) {
579 warning(_("Remote branch %s not found in "
580 "upstream %s, using HEAD instead"),
581 option_branch, option_origin);
582 our_head_points_at = remote_head_points_at;
585 else
586 our_head_points_at = remote_head_points_at;
588 else {
589 warning(_("You appear to have cloned an empty repository."));
590 our_head_points_at = NULL;
591 remote_head_points_at = NULL;
592 remote_head = NULL;
593 option_no_checkout = 1;
594 if (!option_bare)
595 install_branch_config(0, "master", option_origin,
596 "refs/heads/master");
599 if (remote_head_points_at && !option_bare) {
600 struct strbuf head_ref = STRBUF_INIT;
601 strbuf_addstr(&head_ref, branch_top.buf);
602 strbuf_addstr(&head_ref, "HEAD");
603 create_symref(head_ref.buf,
604 remote_head_points_at->peer_ref->name,
605 reflog_msg.buf);
608 if (our_head_points_at) {
609 /* Local default branch link */
610 create_symref("HEAD", our_head_points_at->name, NULL);
611 if (!option_bare) {
612 const char *head = skip_prefix(our_head_points_at->name,
613 "refs/heads/");
614 update_ref(reflog_msg.buf, "HEAD",
615 our_head_points_at->old_sha1,
616 NULL, 0, DIE_ON_ERR);
617 install_branch_config(0, head, option_origin,
618 our_head_points_at->name);
620 } else if (remote_head) {
621 /* Source had detached HEAD pointing somewhere. */
622 if (!option_bare) {
623 update_ref(reflog_msg.buf, "HEAD",
624 remote_head->old_sha1,
625 NULL, REF_NODEREF, DIE_ON_ERR);
626 our_head_points_at = remote_head;
628 } else {
629 /* Nothing to checkout out */
630 if (!option_no_checkout)
631 warning(_("remote HEAD refers to nonexistent ref, "
632 "unable to checkout.\n"));
633 option_no_checkout = 1;
636 if (transport) {
637 transport_unlock_pack(transport);
638 transport_disconnect(transport);
641 if (!option_no_checkout) {
642 struct lock_file *lock_file = xcalloc(1, sizeof(struct lock_file));
643 struct unpack_trees_options opts;
644 struct tree *tree;
645 struct tree_desc t;
646 int fd;
648 /* We need to be in the new work tree for the checkout */
649 setup_work_tree();
651 fd = hold_locked_index(lock_file, 1);
653 memset(&opts, 0, sizeof opts);
654 opts.update = 1;
655 opts.merge = 1;
656 opts.fn = oneway_merge;
657 opts.verbose_update = (option_verbosity > 0);
658 opts.src_index = &the_index;
659 opts.dst_index = &the_index;
661 tree = parse_tree_indirect(our_head_points_at->old_sha1);
662 parse_tree(tree);
663 init_tree_desc(&t, tree->buffer, tree->size);
664 unpack_trees(1, &t, &opts);
666 if (write_cache(fd, active_cache, active_nr) ||
667 commit_locked_index(lock_file))
668 die(_("unable to write new index file"));
670 err |= run_hook(NULL, "post-checkout", sha1_to_hex(null_sha1),
671 sha1_to_hex(our_head_points_at->old_sha1), "1",
672 NULL);
674 if (!err && option_recursive)
675 err = run_command_v_opt(argv_submodule, RUN_GIT_CMD);
678 strbuf_release(&reflog_msg);
679 strbuf_release(&branch_top);
680 strbuf_release(&key);
681 strbuf_release(&value);
682 junk_pid = 0;
683 return err;