gitk: Second try to work around the command line limit on Windows
[git/dscho.git] / builtin / clone.c
blob05f8fb4771b1ef07030338a6fd38dc7cb3bc1d1d
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_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_verbosity;
47 static int option_progress;
49 static struct option builtin_clone_options[] = {
50 OPT__VERBOSITY(&option_verbosity),
51 OPT_BOOLEAN(0, "progress", &option_progress,
52 "force progress reporting"),
53 OPT_BOOLEAN('n', "no-checkout", &option_no_checkout,
54 "don't create a checkout"),
55 OPT_BOOLEAN(0, "bare", &option_bare, "create a bare repository"),
56 { OPTION_BOOLEAN, 0, "naked", &option_bare, NULL,
57 "create a bare repository",
58 PARSE_OPT_NOARG | PARSE_OPT_HIDDEN },
59 OPT_BOOLEAN(0, "mirror", &option_mirror,
60 "create a mirror repository (implies bare)"),
61 OPT_BOOLEAN('l', "local", &option_local,
62 "to clone from a local repository"),
63 OPT_BOOLEAN(0, "no-hardlinks", &option_no_hardlinks,
64 "don't use local hardlinks, always copy"),
65 OPT_BOOLEAN('s', "shared", &option_shared,
66 "setup as shared repository"),
67 OPT_BOOLEAN(0, "recursive", &option_recursive,
68 "initialize submodules in the clone"),
69 OPT_STRING(0, "template", &option_template, "path",
70 "path the template repository"),
71 OPT_STRING(0, "reference", &option_reference, "repo",
72 "reference repository"),
73 OPT_STRING('o', "origin", &option_origin, "branch",
74 "use <branch> instead of 'origin' to track upstream"),
75 OPT_STRING('b', "branch", &option_branch, "branch",
76 "checkout <branch> instead of the remote's HEAD"),
77 OPT_STRING('u', "upload-pack", &option_upload_pack, "path",
78 "path to git-upload-pack on the remote"),
79 OPT_STRING(0, "depth", &option_depth, "depth",
80 "create a shallow clone of that depth"),
82 OPT_END()
85 static const char *argv_submodule[] = {
86 "submodule", "update", "--init", "--recursive", NULL
89 static char *get_repo_path(const char *repo, int *is_bundle)
91 static char *suffix[] = { "/.git", ".git", "" };
92 static char *bundle_suffix[] = { ".bundle", "" };
93 struct stat st;
94 int i;
96 for (i = 0; i < ARRAY_SIZE(suffix); i++) {
97 const char *path;
98 path = mkpath("%s%s", repo, suffix[i]);
99 if (is_directory(path)) {
100 *is_bundle = 0;
101 return xstrdup(make_nonrelative_path(path));
105 for (i = 0; i < ARRAY_SIZE(bundle_suffix); i++) {
106 const char *path;
107 path = mkpath("%s%s", repo, bundle_suffix[i]);
108 if (!stat(path, &st) && S_ISREG(st.st_mode)) {
109 *is_bundle = 1;
110 return xstrdup(make_nonrelative_path(path));
114 return NULL;
117 static char *guess_dir_name(const char *repo, int is_bundle, int is_bare)
119 const char *end = repo + strlen(repo), *start;
120 char *dir;
123 * Strip trailing spaces, slashes and /.git
125 while (repo < end && (is_dir_sep(end[-1]) || isspace(end[-1])))
126 end--;
127 if (end - repo > 5 && is_dir_sep(end[-5]) &&
128 !strncmp(end - 4, ".git", 4)) {
129 end -= 5;
130 while (repo < end && is_dir_sep(end[-1]))
131 end--;
135 * Find last component, but be prepared that repo could have
136 * the form "remote.example.com:foo.git", i.e. no slash
137 * in the directory part.
139 start = end;
140 while (repo < start && !is_dir_sep(start[-1]) && start[-1] != ':')
141 start--;
144 * Strip .{bundle,git}.
146 if (is_bundle) {
147 if (end - start > 7 && !strncmp(end - 7, ".bundle", 7))
148 end -= 7;
149 } else {
150 if (end - start > 4 && !strncmp(end - 4, ".git", 4))
151 end -= 4;
154 if (is_bare) {
155 struct strbuf result = STRBUF_INIT;
156 strbuf_addf(&result, "%.*s.git", (int)(end - start), start);
157 dir = strbuf_detach(&result, NULL);
158 } else
159 dir = xstrndup(start, end - start);
161 * Replace sequences of 'control' characters and whitespace
162 * with one ascii space, remove leading and trailing spaces.
164 if (*dir) {
165 char *out = dir;
166 int prev_space = 1 /* strip leading whitespace */;
167 for (end = dir; *end; ++end) {
168 char ch = *end;
169 if ((unsigned char)ch < '\x20')
170 ch = '\x20';
171 if (isspace(ch)) {
172 if (prev_space)
173 continue;
174 prev_space = 1;
175 } else
176 prev_space = 0;
177 *out++ = ch;
179 *out = '\0';
180 if (out > dir && prev_space)
181 out[-1] = '\0';
183 return dir;
186 static void strip_trailing_slashes(char *dir)
188 char *end = dir + strlen(dir);
190 while (dir < end - 1 && is_dir_sep(end[-1]))
191 end--;
192 *end = '\0';
195 static void setup_reference(const char *repo)
197 const char *ref_git;
198 char *ref_git_copy;
200 struct remote *remote;
201 struct transport *transport;
202 const struct ref *extra;
204 ref_git = make_absolute_path(option_reference);
206 if (is_directory(mkpath("%s/.git/objects", ref_git)))
207 ref_git = mkpath("%s/.git", ref_git);
208 else if (!is_directory(mkpath("%s/objects", ref_git)))
209 die("reference repository '%s' is not a local directory.",
210 option_reference);
212 ref_git_copy = xstrdup(ref_git);
214 add_to_alternates_file(ref_git_copy);
216 remote = remote_get(ref_git_copy);
217 transport = transport_get(remote, ref_git_copy);
218 for (extra = transport_get_remote_refs(transport); extra;
219 extra = extra->next)
220 add_extra_ref(extra->name, extra->old_sha1, 0);
222 transport_disconnect(transport);
224 free(ref_git_copy);
227 static void copy_or_link_directory(struct strbuf *src, struct strbuf *dest)
229 struct dirent *de;
230 struct stat buf;
231 int src_len, dest_len;
232 DIR *dir;
234 dir = opendir(src->buf);
235 if (!dir)
236 die_errno("failed to open '%s'", src->buf);
238 if (mkdir(dest->buf, 0777)) {
239 if (errno != EEXIST)
240 die_errno("failed to create directory '%s'", dest->buf);
241 else if (stat(dest->buf, &buf))
242 die_errno("failed to stat '%s'", dest->buf);
243 else if (!S_ISDIR(buf.st_mode))
244 die("%s exists and is not a directory", dest->buf);
247 strbuf_addch(src, '/');
248 src_len = src->len;
249 strbuf_addch(dest, '/');
250 dest_len = dest->len;
252 while ((de = readdir(dir)) != NULL) {
253 strbuf_setlen(src, src_len);
254 strbuf_addstr(src, de->d_name);
255 strbuf_setlen(dest, dest_len);
256 strbuf_addstr(dest, de->d_name);
257 if (stat(src->buf, &buf)) {
258 warning ("failed to stat %s\n", src->buf);
259 continue;
261 if (S_ISDIR(buf.st_mode)) {
262 if (de->d_name[0] != '.')
263 copy_or_link_directory(src, dest);
264 continue;
267 if (unlink(dest->buf) && errno != ENOENT)
268 die_errno("failed to unlink '%s'", dest->buf);
269 if (!option_no_hardlinks) {
270 if (!link(src->buf, dest->buf))
271 continue;
272 if (option_local)
273 die_errno("failed to create link '%s'", dest->buf);
274 option_no_hardlinks = 1;
276 if (copy_file_with_time(dest->buf, src->buf, 0666))
277 die_errno("failed to copy file to '%s'", dest->buf);
279 closedir(dir);
282 static const struct ref *clone_local(const char *src_repo,
283 const char *dest_repo)
285 const struct ref *ret;
286 struct strbuf src = STRBUF_INIT;
287 struct strbuf dest = STRBUF_INIT;
288 struct remote *remote;
289 struct transport *transport;
291 if (option_shared)
292 add_to_alternates_file(src_repo);
293 else {
294 strbuf_addf(&src, "%s/objects", src_repo);
295 strbuf_addf(&dest, "%s/objects", dest_repo);
296 copy_or_link_directory(&src, &dest);
297 strbuf_release(&src);
298 strbuf_release(&dest);
301 remote = remote_get(src_repo);
302 transport = transport_get(remote, src_repo);
303 ret = transport_get_remote_refs(transport);
304 transport_disconnect(transport);
305 return ret;
308 static const char *junk_work_tree;
309 static const char *junk_git_dir;
310 static pid_t junk_pid;
312 static void remove_junk(void)
314 struct strbuf sb = STRBUF_INIT;
315 if (getpid() != junk_pid)
316 return;
317 if (junk_git_dir) {
318 strbuf_addstr(&sb, junk_git_dir);
319 remove_dir_recursively(&sb, 0);
320 strbuf_reset(&sb);
322 if (junk_work_tree) {
323 strbuf_addstr(&sb, junk_work_tree);
324 remove_dir_recursively(&sb, 0);
325 strbuf_reset(&sb);
329 static void remove_junk_on_signal(int signo)
331 remove_junk();
332 sigchain_pop(signo);
333 raise(signo);
336 static struct ref *wanted_peer_refs(const struct ref *refs,
337 struct refspec *refspec)
339 struct ref *local_refs = NULL;
340 struct ref **tail = &local_refs;
342 get_fetch_map(refs, refspec, &tail, 0);
343 if (!option_mirror)
344 get_fetch_map(refs, tag_refspec, &tail, 0);
346 return local_refs;
349 static void write_remote_refs(const struct ref *local_refs)
351 const struct ref *r;
353 for (r = local_refs; r; r = r->next)
354 add_extra_ref(r->peer_ref->name, r->old_sha1, 0);
356 pack_refs(PACK_REFS_ALL);
357 clear_extra_refs();
360 int cmd_clone(int argc, const char **argv, const char *prefix)
362 int is_bundle = 0;
363 struct stat buf;
364 const char *repo_name, *repo, *work_tree, *git_dir;
365 char *path, *dir;
366 int dest_exists;
367 const struct ref *refs, *remote_head;
368 const struct ref *remote_head_points_at;
369 const struct ref *our_head_points_at;
370 struct ref *mapped_refs;
371 struct strbuf key = STRBUF_INIT, value = STRBUF_INIT;
372 struct strbuf branch_top = STRBUF_INIT, reflog_msg = STRBUF_INIT;
373 struct transport *transport = NULL;
374 char *src_ref_prefix = "refs/heads/";
375 int err = 0;
377 struct refspec *refspec;
378 const char *fetch_pattern;
380 junk_pid = getpid();
382 argc = parse_options(argc, argv, prefix, builtin_clone_options,
383 builtin_clone_usage, 0);
385 if (argc > 2)
386 usage_msg_opt("Too many arguments.",
387 builtin_clone_usage, builtin_clone_options);
389 if (argc == 0)
390 usage_msg_opt("You must specify a repository to clone.",
391 builtin_clone_usage, builtin_clone_options);
393 if (option_mirror)
394 option_bare = 1;
396 if (option_bare) {
397 if (option_origin)
398 die("--bare and --origin %s options are incompatible.",
399 option_origin);
400 option_no_checkout = 1;
403 if (!option_origin)
404 option_origin = "origin";
406 repo_name = argv[0];
408 path = get_repo_path(repo_name, &is_bundle);
409 if (path)
410 repo = xstrdup(make_nonrelative_path(repo_name));
411 else if (!strchr(repo_name, ':'))
412 repo = xstrdup(make_absolute_path(repo_name));
413 else
414 repo = repo_name;
416 if (argc == 2)
417 dir = xstrdup(argv[1]);
418 else
419 dir = guess_dir_name(repo_name, is_bundle, option_bare);
420 strip_trailing_slashes(dir);
422 dest_exists = !stat(dir, &buf);
423 if (dest_exists && !is_empty_dir(dir))
424 die("destination path '%s' already exists and is not "
425 "an empty directory.", dir);
427 strbuf_addf(&reflog_msg, "clone: from %s", repo);
429 if (option_bare)
430 work_tree = NULL;
431 else {
432 work_tree = getenv("GIT_WORK_TREE");
433 if (work_tree && !stat(work_tree, &buf))
434 die("working tree '%s' already exists.", work_tree);
437 if (option_bare || work_tree)
438 git_dir = xstrdup(dir);
439 else {
440 work_tree = dir;
441 git_dir = xstrdup(mkpath("%s/.git", dir));
444 if (!option_bare) {
445 junk_work_tree = work_tree;
446 if (safe_create_leading_directories_const(work_tree) < 0)
447 die_errno("could not create leading directories of '%s'",
448 work_tree);
449 if (!dest_exists && mkdir(work_tree, 0755))
450 die_errno("could not create work tree dir '%s'.",
451 work_tree);
452 set_git_work_tree(work_tree);
454 junk_git_dir = git_dir;
455 atexit(remove_junk);
456 sigchain_push_common(remove_junk_on_signal);
458 setenv(CONFIG_ENVIRONMENT, mkpath("%s/config", git_dir), 1);
460 if (safe_create_leading_directories_const(git_dir) < 0)
461 die("could not create leading directories of '%s'", git_dir);
462 set_git_dir(make_absolute_path(git_dir));
464 init_db(option_template, (option_verbosity < 0) ? INIT_DB_QUIET : 0);
467 * At this point, the config exists, so we do not need the
468 * environment variable. We actually need to unset it, too, to
469 * re-enable parsing of the global configs.
471 unsetenv(CONFIG_ENVIRONMENT);
473 if (option_reference)
474 setup_reference(git_dir);
476 git_config(git_default_config, NULL);
478 if (option_bare) {
479 if (option_mirror)
480 src_ref_prefix = "refs/";
481 strbuf_addstr(&branch_top, src_ref_prefix);
483 git_config_set("core.bare", "true");
484 } else {
485 strbuf_addf(&branch_top, "refs/remotes/%s/", option_origin);
488 strbuf_addf(&value, "+%s*:%s*", src_ref_prefix, branch_top.buf);
490 if (option_mirror || !option_bare) {
491 /* Configure the remote */
492 strbuf_addf(&key, "remote.%s.fetch", option_origin);
493 git_config_set_multivar(key.buf, value.buf, "^$", 0);
494 strbuf_reset(&key);
496 if (option_mirror) {
497 strbuf_addf(&key, "remote.%s.mirror", option_origin);
498 git_config_set(key.buf, "true");
499 strbuf_reset(&key);
502 strbuf_addf(&key, "remote.%s.url", option_origin);
503 git_config_set(key.buf, repo);
504 strbuf_reset(&key);
507 fetch_pattern = value.buf;
508 refspec = parse_fetch_refspec(1, &fetch_pattern);
510 strbuf_reset(&value);
512 if (path && !is_bundle) {
513 refs = clone_local(path, git_dir);
514 mapped_refs = wanted_peer_refs(refs, refspec);
515 } else {
516 struct remote *remote = remote_get(argv[0]);
517 transport = transport_get(remote, remote->url[0]);
519 if (!transport->get_refs_list || !transport->fetch)
520 die("Don't know how to clone %s", transport->url);
522 transport_set_option(transport, TRANS_OPT_KEEP, "yes");
524 if (option_depth)
525 transport_set_option(transport, TRANS_OPT_DEPTH,
526 option_depth);
528 transport_set_verbosity(transport, option_verbosity, option_progress);
530 if (option_upload_pack)
531 transport_set_option(transport, TRANS_OPT_UPLOADPACK,
532 option_upload_pack);
534 refs = transport_get_remote_refs(transport);
535 if (refs) {
536 mapped_refs = wanted_peer_refs(refs, refspec);
537 transport_fetch_refs(transport, mapped_refs);
541 if (refs) {
542 clear_extra_refs();
544 write_remote_refs(mapped_refs);
546 remote_head = find_ref_by_name(refs, "HEAD");
547 remote_head_points_at =
548 guess_remote_head(remote_head, mapped_refs, 0);
550 if (option_branch) {
551 struct strbuf head = STRBUF_INIT;
552 strbuf_addstr(&head, src_ref_prefix);
553 strbuf_addstr(&head, option_branch);
554 our_head_points_at =
555 find_ref_by_name(mapped_refs, head.buf);
556 strbuf_release(&head);
558 if (!our_head_points_at) {
559 warning("Remote branch %s not found in "
560 "upstream %s, using HEAD instead",
561 option_branch, option_origin);
562 our_head_points_at = remote_head_points_at;
565 else
566 our_head_points_at = remote_head_points_at;
568 else {
569 warning("You appear to have cloned an empty repository.");
570 our_head_points_at = NULL;
571 remote_head_points_at = NULL;
572 remote_head = NULL;
573 option_no_checkout = 1;
574 if (!option_bare)
575 install_branch_config(0, "master", option_origin,
576 "refs/heads/master");
579 if (remote_head_points_at && !option_bare) {
580 struct strbuf head_ref = STRBUF_INIT;
581 strbuf_addstr(&head_ref, branch_top.buf);
582 strbuf_addstr(&head_ref, "HEAD");
583 create_symref(head_ref.buf,
584 remote_head_points_at->peer_ref->name,
585 reflog_msg.buf);
588 if (our_head_points_at) {
589 /* Local default branch link */
590 create_symref("HEAD", our_head_points_at->name, NULL);
591 if (!option_bare) {
592 const char *head = skip_prefix(our_head_points_at->name,
593 "refs/heads/");
594 update_ref(reflog_msg.buf, "HEAD",
595 our_head_points_at->old_sha1,
596 NULL, 0, DIE_ON_ERR);
597 install_branch_config(0, head, option_origin,
598 our_head_points_at->name);
600 } else if (remote_head) {
601 /* Source had detached HEAD pointing somewhere. */
602 if (!option_bare) {
603 update_ref(reflog_msg.buf, "HEAD",
604 remote_head->old_sha1,
605 NULL, REF_NODEREF, DIE_ON_ERR);
606 our_head_points_at = remote_head;
608 } else {
609 /* Nothing to checkout out */
610 if (!option_no_checkout)
611 warning("remote HEAD refers to nonexistent ref, "
612 "unable to checkout.\n");
613 option_no_checkout = 1;
616 if (transport) {
617 transport_unlock_pack(transport);
618 transport_disconnect(transport);
621 if (!option_no_checkout) {
622 struct lock_file *lock_file = xcalloc(1, sizeof(struct lock_file));
623 struct unpack_trees_options opts;
624 struct tree *tree;
625 struct tree_desc t;
626 int fd;
628 /* We need to be in the new work tree for the checkout */
629 setup_work_tree();
631 fd = hold_locked_index(lock_file, 1);
633 memset(&opts, 0, sizeof opts);
634 opts.update = 1;
635 opts.merge = 1;
636 opts.fn = oneway_merge;
637 opts.verbose_update = (option_verbosity > 0);
638 opts.src_index = &the_index;
639 opts.dst_index = &the_index;
641 tree = parse_tree_indirect(our_head_points_at->old_sha1);
642 parse_tree(tree);
643 init_tree_desc(&t, tree->buffer, tree->size);
644 unpack_trees(1, &t, &opts);
646 if (write_cache(fd, active_cache, active_nr) ||
647 commit_locked_index(lock_file))
648 die("unable to write new index file");
650 err |= run_hook(NULL, "post-checkout", sha1_to_hex(null_sha1),
651 sha1_to_hex(our_head_points_at->old_sha1), "1",
652 NULL);
654 if (!err && option_recursive)
655 err = run_command_v_opt(argv_submodule, RUN_GIT_CMD);
658 strbuf_release(&reflog_msg);
659 strbuf_release(&branch_top);
660 strbuf_release(&key);
661 strbuf_release(&value);
662 junk_pid = 0;
663 return err;