Merge branch 'maint'
[git/jnareb-git.git] / builtin-clone.c
blob58bacbd552c1e2496034346265a3e5ab219e2672
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 "cache.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_quiet, 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 char *option_upload_pack = "git-upload-pack";
46 static int option_verbose;
47 static int option_progress;
49 static struct option builtin_clone_options[] = {
50 OPT__QUIET(&option_quiet),
51 OPT__VERBOSE(&option_verbose),
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_STRING(0, "template", &option_template, "path",
71 "path the template repository"),
72 OPT_STRING(0, "reference", &option_reference, "repo",
73 "reference repository"),
74 OPT_STRING('o', "origin", &option_origin, "branch",
75 "use <branch> instead of 'origin' to track upstream"),
76 OPT_STRING('b', "branch", &option_branch, "branch",
77 "checkout <branch> instead of the remote's HEAD"),
78 OPT_STRING('u', "upload-pack", &option_upload_pack, "path",
79 "path to git-upload-pack on the remote"),
80 OPT_STRING(0, "depth", &option_depth, "depth",
81 "create a shallow clone of that depth"),
83 OPT_END()
86 static const char *argv_submodule[] = {
87 "submodule", "update", "--init", "--recursive", NULL
90 static char *get_repo_path(const char *repo, int *is_bundle)
92 static char *suffix[] = { "/.git", ".git", "" };
93 static char *bundle_suffix[] = { ".bundle", "" };
94 struct stat st;
95 int i;
97 for (i = 0; i < ARRAY_SIZE(suffix); i++) {
98 const char *path;
99 path = mkpath("%s%s", repo, suffix[i]);
100 if (is_directory(path)) {
101 *is_bundle = 0;
102 return xstrdup(make_nonrelative_path(path));
106 for (i = 0; i < ARRAY_SIZE(bundle_suffix); i++) {
107 const char *path;
108 path = mkpath("%s%s", repo, bundle_suffix[i]);
109 if (!stat(path, &st) && S_ISREG(st.st_mode)) {
110 *is_bundle = 1;
111 return xstrdup(make_nonrelative_path(path));
115 return NULL;
118 static char *guess_dir_name(const char *repo, int is_bundle, int is_bare)
120 const char *end = repo + strlen(repo), *start;
121 char *dir;
124 * Strip trailing spaces, slashes and /.git
126 while (repo < end && (is_dir_sep(end[-1]) || isspace(end[-1])))
127 end--;
128 if (end - repo > 5 && is_dir_sep(end[-5]) &&
129 !strncmp(end - 4, ".git", 4)) {
130 end -= 5;
131 while (repo < end && is_dir_sep(end[-1]))
132 end--;
136 * Find last component, but be prepared that repo could have
137 * the form "remote.example.com:foo.git", i.e. no slash
138 * in the directory part.
140 start = end;
141 while (repo < start && !is_dir_sep(start[-1]) && start[-1] != ':')
142 start--;
145 * Strip .{bundle,git}.
147 if (is_bundle) {
148 if (end - start > 7 && !strncmp(end - 7, ".bundle", 7))
149 end -= 7;
150 } else {
151 if (end - start > 4 && !strncmp(end - 4, ".git", 4))
152 end -= 4;
155 if (is_bare) {
156 struct strbuf result = STRBUF_INIT;
157 strbuf_addf(&result, "%.*s.git", (int)(end - start), start);
158 dir = strbuf_detach(&result, NULL);
159 } else
160 dir = xstrndup(start, end - start);
162 * Replace sequences of 'control' characters and whitespace
163 * with one ascii space, remove leading and trailing spaces.
165 if (*dir) {
166 char *out = dir;
167 int prev_space = 1 /* strip leading whitespace */;
168 for (end = dir; *end; ++end) {
169 char ch = *end;
170 if ((unsigned char)ch < '\x20')
171 ch = '\x20';
172 if (isspace(ch)) {
173 if (prev_space)
174 continue;
175 prev_space = 1;
176 } else
177 prev_space = 0;
178 *out++ = ch;
180 *out = '\0';
181 if (out > dir && prev_space)
182 out[-1] = '\0';
184 return dir;
187 static void strip_trailing_slashes(char *dir)
189 char *end = dir + strlen(dir);
191 while (dir < end - 1 && is_dir_sep(end[-1]))
192 end--;
193 *end = '\0';
196 static void setup_reference(const char *repo)
198 const char *ref_git;
199 char *ref_git_copy;
201 struct remote *remote;
202 struct transport *transport;
203 const struct ref *extra;
205 ref_git = make_absolute_path(option_reference);
207 if (is_directory(mkpath("%s/.git/objects", ref_git)))
208 ref_git = mkpath("%s/.git", ref_git);
209 else if (!is_directory(mkpath("%s/objects", ref_git)))
210 die("reference repository '%s' is not a local directory.",
211 option_reference);
213 ref_git_copy = xstrdup(ref_git);
215 add_to_alternates_file(ref_git_copy);
217 remote = remote_get(ref_git_copy);
218 transport = transport_get(remote, ref_git_copy);
219 for (extra = transport_get_remote_refs(transport); extra;
220 extra = extra->next)
221 add_extra_ref(extra->name, extra->old_sha1, 0);
223 transport_disconnect(transport);
225 free(ref_git_copy);
228 static void copy_or_link_directory(struct strbuf *src, struct strbuf *dest)
230 struct dirent *de;
231 struct stat buf;
232 int src_len, dest_len;
233 DIR *dir;
235 dir = opendir(src->buf);
236 if (!dir)
237 die_errno("failed to open '%s'", src->buf);
239 if (mkdir(dest->buf, 0777)) {
240 if (errno != EEXIST)
241 die_errno("failed to create directory '%s'", dest->buf);
242 else if (stat(dest->buf, &buf))
243 die_errno("failed to stat '%s'", dest->buf);
244 else if (!S_ISDIR(buf.st_mode))
245 die("%s exists and is not a directory", dest->buf);
248 strbuf_addch(src, '/');
249 src_len = src->len;
250 strbuf_addch(dest, '/');
251 dest_len = dest->len;
253 while ((de = readdir(dir)) != NULL) {
254 strbuf_setlen(src, src_len);
255 strbuf_addstr(src, de->d_name);
256 strbuf_setlen(dest, dest_len);
257 strbuf_addstr(dest, de->d_name);
258 if (stat(src->buf, &buf)) {
259 warning ("failed to stat %s\n", src->buf);
260 continue;
262 if (S_ISDIR(buf.st_mode)) {
263 if (de->d_name[0] != '.')
264 copy_or_link_directory(src, dest);
265 continue;
268 if (unlink(dest->buf) && errno != ENOENT)
269 die_errno("failed to unlink '%s'", dest->buf);
270 if (!option_no_hardlinks) {
271 if (!link(src->buf, dest->buf))
272 continue;
273 if (option_local)
274 die_errno("failed to create link '%s'", dest->buf);
275 option_no_hardlinks = 1;
277 if (copy_file_with_time(dest->buf, src->buf, 0666))
278 die_errno("failed to copy file to '%s'", dest->buf);
280 closedir(dir);
283 static const struct ref *clone_local(const char *src_repo,
284 const char *dest_repo)
286 const struct ref *ret;
287 struct strbuf src = STRBUF_INIT;
288 struct strbuf dest = STRBUF_INIT;
289 struct remote *remote;
290 struct transport *transport;
292 if (option_shared)
293 add_to_alternates_file(src_repo);
294 else {
295 strbuf_addf(&src, "%s/objects", src_repo);
296 strbuf_addf(&dest, "%s/objects", dest_repo);
297 copy_or_link_directory(&src, &dest);
298 strbuf_release(&src);
299 strbuf_release(&dest);
302 remote = remote_get(src_repo);
303 transport = transport_get(remote, src_repo);
304 ret = transport_get_remote_refs(transport);
305 transport_disconnect(transport);
306 return ret;
309 static const char *junk_work_tree;
310 static const char *junk_git_dir;
311 static pid_t junk_pid;
313 static void remove_junk(void)
315 struct strbuf sb = STRBUF_INIT;
316 if (getpid() != junk_pid)
317 return;
318 if (junk_git_dir) {
319 strbuf_addstr(&sb, junk_git_dir);
320 remove_dir_recursively(&sb, 0);
321 strbuf_reset(&sb);
323 if (junk_work_tree) {
324 strbuf_addstr(&sb, junk_work_tree);
325 remove_dir_recursively(&sb, 0);
326 strbuf_reset(&sb);
330 static void remove_junk_on_signal(int signo)
332 remove_junk();
333 sigchain_pop(signo);
334 raise(signo);
337 static struct ref *wanted_peer_refs(const struct ref *refs,
338 struct refspec *refspec)
340 struct ref *local_refs = NULL;
341 struct ref **tail = &local_refs;
343 get_fetch_map(refs, refspec, &tail, 0);
344 if (!option_mirror)
345 get_fetch_map(refs, tag_refspec, &tail, 0);
347 return local_refs;
350 static void write_remote_refs(const struct ref *local_refs)
352 const struct ref *r;
354 for (r = local_refs; r; r = r->next)
355 add_extra_ref(r->peer_ref->name, r->old_sha1, 0);
357 pack_refs(PACK_REFS_ALL);
358 clear_extra_refs();
361 int cmd_clone(int argc, const char **argv, const char *prefix)
363 int is_bundle = 0;
364 struct stat buf;
365 const char *repo_name, *repo, *work_tree, *git_dir;
366 char *path, *dir;
367 int dest_exists;
368 const struct ref *refs, *remote_head;
369 const struct ref *remote_head_points_at;
370 const struct ref *our_head_points_at;
371 struct ref *mapped_refs;
372 struct strbuf key = STRBUF_INIT, value = STRBUF_INIT;
373 struct strbuf branch_top = STRBUF_INIT, reflog_msg = STRBUF_INIT;
374 struct transport *transport = NULL;
375 char *src_ref_prefix = "refs/heads/";
376 int err = 0;
378 struct refspec *refspec;
379 const char *fetch_pattern;
381 junk_pid = getpid();
383 argc = parse_options(argc, argv, prefix, builtin_clone_options,
384 builtin_clone_usage, 0);
386 if (argc > 2)
387 usage_msg_opt("Too many arguments.",
388 builtin_clone_usage, builtin_clone_options);
390 if (argc == 0)
391 usage_msg_opt("You must specify a repository to clone.",
392 builtin_clone_usage, builtin_clone_options);
394 if (option_mirror)
395 option_bare = 1;
397 if (option_bare) {
398 if (option_origin)
399 die("--bare and --origin %s options are incompatible.",
400 option_origin);
401 option_no_checkout = 1;
404 if (!option_origin)
405 option_origin = "origin";
407 repo_name = argv[0];
409 path = get_repo_path(repo_name, &is_bundle);
410 if (path)
411 repo = xstrdup(make_nonrelative_path(repo_name));
412 else if (!strchr(repo_name, ':'))
413 repo = xstrdup(make_absolute_path(repo_name));
414 else
415 repo = repo_name;
417 if (argc == 2)
418 dir = xstrdup(argv[1]);
419 else
420 dir = guess_dir_name(repo_name, is_bundle, option_bare);
421 strip_trailing_slashes(dir);
423 dest_exists = !stat(dir, &buf);
424 if (dest_exists && !is_empty_dir(dir))
425 die("destination path '%s' already exists and is not "
426 "an empty directory.", dir);
428 strbuf_addf(&reflog_msg, "clone: from %s", repo);
430 if (option_bare)
431 work_tree = NULL;
432 else {
433 work_tree = getenv("GIT_WORK_TREE");
434 if (work_tree && !stat(work_tree, &buf))
435 die("working tree '%s' already exists.", work_tree);
438 if (option_bare || work_tree)
439 git_dir = xstrdup(dir);
440 else {
441 work_tree = dir;
442 git_dir = xstrdup(mkpath("%s/.git", dir));
445 if (!option_bare) {
446 junk_work_tree = work_tree;
447 if (safe_create_leading_directories_const(work_tree) < 0)
448 die_errno("could not create leading directories of '%s'",
449 work_tree);
450 if (!dest_exists && mkdir(work_tree, 0755))
451 die_errno("could not create work tree dir '%s'.",
452 work_tree);
453 set_git_work_tree(work_tree);
455 junk_git_dir = git_dir;
456 atexit(remove_junk);
457 sigchain_push_common(remove_junk_on_signal);
459 setenv(CONFIG_ENVIRONMENT, mkpath("%s/config", git_dir), 1);
461 if (safe_create_leading_directories_const(git_dir) < 0)
462 die("could not create leading directories of '%s'", git_dir);
463 set_git_dir(make_absolute_path(git_dir));
465 init_db(option_template, option_quiet ? INIT_DB_QUIET : 0);
468 * At this point, the config exists, so we do not need the
469 * environment variable. We actually need to unset it, too, to
470 * re-enable parsing of the global configs.
472 unsetenv(CONFIG_ENVIRONMENT);
474 if (option_reference)
475 setup_reference(git_dir);
477 git_config(git_default_config, NULL);
479 if (option_bare) {
480 if (option_mirror)
481 src_ref_prefix = "refs/";
482 strbuf_addstr(&branch_top, src_ref_prefix);
484 git_config_set("core.bare", "true");
485 } else {
486 strbuf_addf(&branch_top, "refs/remotes/%s/", option_origin);
489 strbuf_addf(&value, "+%s*:%s*", src_ref_prefix, branch_top.buf);
491 if (option_mirror || !option_bare) {
492 /* Configure the remote */
493 strbuf_addf(&key, "remote.%s.fetch", option_origin);
494 git_config_set_multivar(key.buf, value.buf, "^$", 0);
495 strbuf_reset(&key);
497 if (option_mirror) {
498 strbuf_addf(&key, "remote.%s.mirror", option_origin);
499 git_config_set(key.buf, "true");
500 strbuf_reset(&key);
503 strbuf_addf(&key, "remote.%s.url", option_origin);
504 git_config_set(key.buf, repo);
505 strbuf_reset(&key);
508 fetch_pattern = value.buf;
509 refspec = parse_fetch_refspec(1, &fetch_pattern);
511 strbuf_reset(&value);
513 if (path && !is_bundle) {
514 refs = clone_local(path, git_dir);
515 mapped_refs = wanted_peer_refs(refs, refspec);
516 } else {
517 struct remote *remote = remote_get(argv[0]);
518 transport = transport_get(remote, remote->url[0]);
520 if (!transport->get_refs_list || !transport->fetch)
521 die("Don't know how to clone %s", transport->url);
523 transport_set_option(transport, TRANS_OPT_KEEP, "yes");
525 if (option_depth)
526 transport_set_option(transport, TRANS_OPT_DEPTH,
527 option_depth);
529 if (option_quiet)
530 transport->verbose = -1;
531 else if (option_verbose)
532 transport->verbose = 1;
534 if (option_progress)
535 transport->progress = 1;
537 if (option_upload_pack)
538 transport_set_option(transport, TRANS_OPT_UPLOADPACK,
539 option_upload_pack);
541 refs = transport_get_remote_refs(transport);
542 if (refs) {
543 mapped_refs = wanted_peer_refs(refs, refspec);
544 transport_fetch_refs(transport, mapped_refs);
548 if (refs) {
549 clear_extra_refs();
551 write_remote_refs(mapped_refs);
553 remote_head = find_ref_by_name(refs, "HEAD");
554 remote_head_points_at =
555 guess_remote_head(remote_head, mapped_refs, 0);
557 if (option_branch) {
558 struct strbuf head = STRBUF_INIT;
559 strbuf_addstr(&head, src_ref_prefix);
560 strbuf_addstr(&head, option_branch);
561 our_head_points_at =
562 find_ref_by_name(mapped_refs, head.buf);
563 strbuf_release(&head);
565 if (!our_head_points_at) {
566 warning("Remote branch %s not found in "
567 "upstream %s, using HEAD instead",
568 option_branch, option_origin);
569 our_head_points_at = remote_head_points_at;
572 else
573 our_head_points_at = remote_head_points_at;
575 else {
576 warning("You appear to have cloned an empty repository.");
577 our_head_points_at = NULL;
578 remote_head_points_at = NULL;
579 remote_head = NULL;
580 option_no_checkout = 1;
581 if (!option_bare)
582 install_branch_config(0, "master", option_origin,
583 "refs/heads/master");
586 if (remote_head_points_at && !option_bare) {
587 struct strbuf head_ref = STRBUF_INIT;
588 strbuf_addstr(&head_ref, branch_top.buf);
589 strbuf_addstr(&head_ref, "HEAD");
590 create_symref(head_ref.buf,
591 remote_head_points_at->peer_ref->name,
592 reflog_msg.buf);
595 if (our_head_points_at) {
596 /* Local default branch link */
597 create_symref("HEAD", our_head_points_at->name, NULL);
598 if (!option_bare) {
599 const char *head = skip_prefix(our_head_points_at->name,
600 "refs/heads/");
601 update_ref(reflog_msg.buf, "HEAD",
602 our_head_points_at->old_sha1,
603 NULL, 0, DIE_ON_ERR);
604 install_branch_config(0, head, option_origin,
605 our_head_points_at->name);
607 } else if (remote_head) {
608 /* Source had detached HEAD pointing somewhere. */
609 if (!option_bare) {
610 update_ref(reflog_msg.buf, "HEAD",
611 remote_head->old_sha1,
612 NULL, REF_NODEREF, DIE_ON_ERR);
613 our_head_points_at = remote_head;
615 } else {
616 /* Nothing to checkout out */
617 if (!option_no_checkout)
618 warning("remote HEAD refers to nonexistent ref, "
619 "unable to checkout.\n");
620 option_no_checkout = 1;
623 if (transport) {
624 transport_unlock_pack(transport);
625 transport_disconnect(transport);
628 if (!option_no_checkout) {
629 struct lock_file *lock_file = xcalloc(1, sizeof(struct lock_file));
630 struct unpack_trees_options opts;
631 struct tree *tree;
632 struct tree_desc t;
633 int fd;
635 /* We need to be in the new work tree for the checkout */
636 setup_work_tree();
638 fd = hold_locked_index(lock_file, 1);
640 memset(&opts, 0, sizeof opts);
641 opts.update = 1;
642 opts.merge = 1;
643 opts.fn = oneway_merge;
644 opts.verbose_update = !option_quiet;
645 opts.src_index = &the_index;
646 opts.dst_index = &the_index;
648 tree = parse_tree_indirect(our_head_points_at->old_sha1);
649 parse_tree(tree);
650 init_tree_desc(&t, tree->buffer, tree->size);
651 unpack_trees(1, &t, &opts);
653 if (write_cache(fd, active_cache, active_nr) ||
654 commit_locked_index(lock_file))
655 die("unable to write new index file");
657 err |= run_hook(NULL, "post-checkout", sha1_to_hex(null_sha1),
658 sha1_to_hex(our_head_points_at->old_sha1), "1",
659 NULL);
661 if (!err && option_recursive)
662 err = run_command_v_opt(argv_submodule, RUN_GIT_CMD);
665 strbuf_release(&reflog_msg);
666 strbuf_release(&branch_top);
667 strbuf_release(&key);
668 strbuf_release(&value);
669 junk_pid = 0;
670 return err;