Merge commit 'refs/top-bases/girocco' into girocco
[git/repo.git] / builtin-clone.c
blob49d2eb9c2ba574f2c1484717f0755208e7ed8147
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"
24 * Overall FIXMEs:
25 * - respect DB_ENVIRONMENT for .git/objects.
27 * Implementation notes:
28 * - dropping use-separate-remote and no-separate-remote compatibility
31 static const char * const builtin_clone_usage[] = {
32 "git clone [options] [--] <repo> [<dir>]",
33 NULL
36 static int option_quiet, option_no_checkout, option_bare, option_mirror;
37 static int option_local, option_no_hardlinks, option_shared;
38 static char *option_template, *option_reference, *option_depth;
39 static char *option_origin = NULL;
40 static char *option_upload_pack = "git-upload-pack";
42 static struct option builtin_clone_options[] = {
43 OPT__QUIET(&option_quiet),
44 OPT_BOOLEAN('n', "no-checkout", &option_no_checkout,
45 "don't create a checkout"),
46 OPT_BOOLEAN(0, "bare", &option_bare, "create a bare repository"),
47 OPT_BOOLEAN(0, "naked", &option_bare, "create a bare repository"),
48 OPT_BOOLEAN(0, "mirror", &option_mirror,
49 "create a mirror repository (implies bare)"),
50 OPT_BOOLEAN('l', "local", &option_local,
51 "to clone from a local repository"),
52 OPT_BOOLEAN(0, "no-hardlinks", &option_no_hardlinks,
53 "don't use local hardlinks, always copy"),
54 OPT_BOOLEAN('s', "shared", &option_shared,
55 "setup as shared repository"),
56 OPT_STRING(0, "template", &option_template, "path",
57 "path the template repository"),
58 OPT_STRING(0, "reference", &option_reference, "repo",
59 "reference repository"),
60 OPT_STRING('o', "origin", &option_origin, "branch",
61 "use <branch> instead of 'origin' to track upstream"),
62 OPT_STRING('u', "upload-pack", &option_upload_pack, "path",
63 "path to git-upload-pack on the remote"),
64 OPT_STRING(0, "depth", &option_depth, "depth",
65 "create a shallow clone of that depth"),
67 OPT_END()
70 static char *get_repo_path(const char *repo, int *is_bundle)
72 static char *suffix[] = { "/.git", ".git", "" };
73 static char *bundle_suffix[] = { ".bundle", "" };
74 struct stat st;
75 int i;
77 for (i = 0; i < ARRAY_SIZE(suffix); i++) {
78 const char *path;
79 path = mkpath("%s%s", repo, suffix[i]);
80 if (is_directory(path)) {
81 *is_bundle = 0;
82 return xstrdup(make_nonrelative_path(path));
86 for (i = 0; i < ARRAY_SIZE(bundle_suffix); i++) {
87 const char *path;
88 path = mkpath("%s%s", repo, bundle_suffix[i]);
89 if (!stat(path, &st) && S_ISREG(st.st_mode)) {
90 *is_bundle = 1;
91 return xstrdup(make_nonrelative_path(path));
95 return NULL;
98 static char *guess_dir_name(const char *repo, int is_bundle, int is_bare)
100 const char *end = repo + strlen(repo), *start;
103 * Strip trailing slashes and /.git
105 while (repo < end && is_dir_sep(end[-1]))
106 end--;
107 if (end - repo > 5 && is_dir_sep(end[-5]) &&
108 !strncmp(end - 4, ".git", 4)) {
109 end -= 5;
110 while (repo < end && is_dir_sep(end[-1]))
111 end--;
115 * Find last component, but be prepared that repo could have
116 * the form "remote.example.com:foo.git", i.e. no slash
117 * in the directory part.
119 start = end;
120 while (repo < start && !is_dir_sep(start[-1]) && start[-1] != ':')
121 start--;
124 * Strip .{bundle,git}.
126 if (is_bundle) {
127 if (end - start > 7 && !strncmp(end - 7, ".bundle", 7))
128 end -= 7;
129 } else {
130 if (end - start > 4 && !strncmp(end - 4, ".git", 4))
131 end -= 4;
134 if (is_bare) {
135 char *result = xmalloc(end - start + 5);
136 sprintf(result, "%.*s.git", (int)(end - start), start);
137 return result;
140 return xstrndup(start, end - start);
143 static void strip_trailing_slashes(char *dir)
145 char *end = dir + strlen(dir);
147 while (dir < end - 1 && is_dir_sep(end[-1]))
148 end--;
149 *end = '\0';
152 static void setup_reference(const char *repo)
154 const char *ref_git;
155 char *ref_git_copy;
157 struct remote *remote;
158 struct transport *transport;
159 const struct ref *extra;
161 ref_git = make_absolute_path(option_reference);
163 if (is_directory(mkpath("%s/.git/objects", ref_git)))
164 ref_git = mkpath("%s/.git", ref_git);
165 else if (!is_directory(mkpath("%s/objects", ref_git)))
166 die("reference repository '%s' is not a local directory.",
167 option_reference);
169 ref_git_copy = xstrdup(ref_git);
171 add_to_alternates_file(ref_git_copy);
173 remote = remote_get(ref_git_copy);
174 transport = transport_get(remote, ref_git_copy);
175 for (extra = transport_get_remote_refs(transport); extra;
176 extra = extra->next)
177 add_extra_ref(extra->name, extra->old_sha1, 0);
179 transport_disconnect(transport);
181 free(ref_git_copy);
184 static void copy_or_link_directory(char *src, char *dest)
186 struct dirent *de;
187 struct stat buf;
188 int src_len, dest_len;
189 DIR *dir;
191 dir = opendir(src);
192 if (!dir)
193 die("failed to open %s\n", src);
195 if (mkdir(dest, 0777)) {
196 if (errno != EEXIST)
197 die("failed to create directory %s\n", dest);
198 else if (stat(dest, &buf))
199 die("failed to stat %s\n", dest);
200 else if (!S_ISDIR(buf.st_mode))
201 die("%s exists and is not a directory\n", dest);
204 src_len = strlen(src);
205 src[src_len] = '/';
206 dest_len = strlen(dest);
207 dest[dest_len] = '/';
209 while ((de = readdir(dir)) != NULL) {
210 strcpy(src + src_len + 1, de->d_name);
211 strcpy(dest + dest_len + 1, de->d_name);
212 if (stat(src, &buf)) {
213 warning ("failed to stat %s\n", src);
214 continue;
216 if (S_ISDIR(buf.st_mode)) {
217 if (de->d_name[0] != '.')
218 copy_or_link_directory(src, dest);
219 continue;
222 if (unlink(dest) && errno != ENOENT)
223 die("failed to unlink %s\n", dest);
224 if (!option_no_hardlinks) {
225 if (!link(src, dest))
226 continue;
227 if (option_local)
228 die("failed to create link %s\n", dest);
229 option_no_hardlinks = 1;
231 if (copy_file(dest, src, 0666))
232 die("failed to copy file to %s\n", dest);
234 closedir(dir);
237 static const struct ref *clone_local(const char *src_repo,
238 const char *dest_repo)
240 const struct ref *ret;
241 char src[PATH_MAX];
242 char dest[PATH_MAX];
243 struct remote *remote;
244 struct transport *transport;
246 if (option_shared)
247 add_to_alternates_file(src_repo);
248 else {
249 snprintf(src, PATH_MAX, "%s/objects", src_repo);
250 snprintf(dest, PATH_MAX, "%s/objects", dest_repo);
251 copy_or_link_directory(src, dest);
254 remote = remote_get(src_repo);
255 transport = transport_get(remote, src_repo);
256 ret = transport_get_remote_refs(transport);
257 transport_disconnect(transport);
258 return ret;
261 static const char *junk_work_tree;
262 static const char *junk_git_dir;
263 pid_t junk_pid;
265 static void remove_junk(void)
267 struct strbuf sb;
268 if (getpid() != junk_pid)
269 return;
270 strbuf_init(&sb, 0);
271 if (junk_git_dir) {
272 strbuf_addstr(&sb, junk_git_dir);
273 remove_dir_recursively(&sb, 0);
274 strbuf_reset(&sb);
276 if (junk_work_tree) {
277 strbuf_addstr(&sb, junk_work_tree);
278 remove_dir_recursively(&sb, 0);
279 strbuf_reset(&sb);
283 static void remove_junk_on_signal(int signo)
285 remove_junk();
286 signal(SIGINT, SIG_DFL);
287 raise(signo);
290 static const struct ref *locate_head(const struct ref *refs,
291 const struct ref *mapped_refs,
292 const struct ref **remote_head_p)
294 const struct ref *remote_head = NULL;
295 const struct ref *remote_master = NULL;
296 const struct ref *r;
297 for (r = refs; r; r = r->next)
298 if (!strcmp(r->name, "HEAD"))
299 remote_head = r;
301 for (r = mapped_refs; r; r = r->next)
302 if (!strcmp(r->name, "refs/heads/master"))
303 remote_master = r;
305 if (remote_head_p)
306 *remote_head_p = remote_head;
308 /* If there's no HEAD value at all, never mind. */
309 if (!remote_head)
310 return NULL;
312 /* If refs/heads/master could be right, it is. */
313 if (remote_master && !hashcmp(remote_master->old_sha1,
314 remote_head->old_sha1))
315 return remote_master;
317 /* Look for another ref that points there */
318 for (r = mapped_refs; r; r = r->next)
319 if (r != remote_head &&
320 !hashcmp(r->old_sha1, remote_head->old_sha1))
321 return r;
323 /* Nothing is the same */
324 return NULL;
327 static struct ref *write_remote_refs(const struct ref *refs,
328 struct refspec *refspec, const char *reflog)
330 struct ref *local_refs = NULL;
331 struct ref **tail = &local_refs;
332 struct ref *r;
334 get_fetch_map(refs, refspec, &tail, 0);
335 if (!option_mirror)
336 get_fetch_map(refs, tag_refspec, &tail, 0);
338 for (r = local_refs; r; r = r->next)
339 add_extra_ref(r->peer_ref->name, r->old_sha1, 0);
341 pack_refs(PACK_REFS_ALL);
342 clear_extra_refs();
344 return local_refs;
347 int cmd_clone(int argc, const char **argv, const char *prefix)
349 int use_local_hardlinks = 1;
350 int use_separate_remote = 1;
351 int is_bundle = 0;
352 struct stat buf;
353 const char *repo_name, *repo, *work_tree, *git_dir;
354 char *path, *dir;
355 const struct ref *refs, *head_points_at, *remote_head, *mapped_refs;
356 char branch_top[256], key[256], value[256];
357 struct strbuf reflog_msg;
358 struct transport *transport = NULL;
359 char *src_ref_prefix = "refs/heads/";
361 struct refspec refspec;
363 junk_pid = getpid();
365 argc = parse_options(argc, argv, builtin_clone_options,
366 builtin_clone_usage, 0);
368 if (argc == 0)
369 die("You must specify a repository to clone.");
371 if (option_no_hardlinks)
372 use_local_hardlinks = 0;
374 if (option_mirror)
375 option_bare = 1;
377 if (option_bare) {
378 if (option_origin)
379 die("--bare and --origin %s options are incompatible.",
380 option_origin);
381 option_no_checkout = 1;
382 use_separate_remote = 0;
385 if (!option_origin)
386 option_origin = "origin";
388 repo_name = argv[0];
390 path = get_repo_path(repo_name, &is_bundle);
391 if (path)
392 repo = xstrdup(make_nonrelative_path(repo_name));
393 else if (!strchr(repo_name, ':'))
394 repo = xstrdup(make_absolute_path(repo_name));
395 else
396 repo = repo_name;
398 if (argc == 2)
399 dir = xstrdup(argv[1]);
400 else
401 dir = guess_dir_name(repo_name, is_bundle, option_bare);
402 strip_trailing_slashes(dir);
404 if (!stat(dir, &buf))
405 die("destination directory '%s' already exists.", dir);
407 strbuf_init(&reflog_msg, 0);
408 strbuf_addf(&reflog_msg, "clone: from %s", repo);
410 if (option_bare)
411 work_tree = NULL;
412 else {
413 work_tree = getenv("GIT_WORK_TREE");
414 if (work_tree && !stat(work_tree, &buf))
415 die("working tree '%s' already exists.", work_tree);
418 if (option_bare || work_tree)
419 git_dir = xstrdup(dir);
420 else {
421 work_tree = dir;
422 git_dir = xstrdup(mkpath("%s/.git", dir));
425 if (!option_bare) {
426 junk_work_tree = work_tree;
427 if (safe_create_leading_directories_const(work_tree) < 0)
428 die("could not create leading directories of '%s': %s",
429 work_tree, strerror(errno));
430 if (mkdir(work_tree, 0755))
431 die("could not create work tree dir '%s': %s.",
432 work_tree, strerror(errno));
433 set_git_work_tree(work_tree);
435 junk_git_dir = git_dir;
436 atexit(remove_junk);
437 signal(SIGINT, remove_junk_on_signal);
439 setenv(CONFIG_ENVIRONMENT, xstrdup(mkpath("%s/config", git_dir)), 1);
441 if (safe_create_leading_directories_const(git_dir) < 0)
442 die("could not create leading directories of '%s'", git_dir);
443 set_git_dir(make_absolute_path(git_dir));
445 init_db(option_template, option_quiet ? INIT_DB_QUIET : 0);
448 * At this point, the config exists, so we do not need the
449 * environment variable. We actually need to unset it, too, to
450 * re-enable parsing of the global configs.
452 unsetenv(CONFIG_ENVIRONMENT);
454 if (option_reference)
455 setup_reference(git_dir);
457 git_config(git_default_config, NULL);
459 if (option_bare) {
460 if (option_mirror)
461 src_ref_prefix = "refs/";
462 strcpy(branch_top, src_ref_prefix);
464 git_config_set("core.bare", "true");
465 } else {
466 snprintf(branch_top, sizeof(branch_top),
467 "refs/remotes/%s/", option_origin);
470 if (option_mirror || !option_bare) {
471 /* Configure the remote */
472 if (option_mirror) {
473 snprintf(key, sizeof(key),
474 "remote.%s.mirror", option_origin);
475 git_config_set(key, "true");
478 snprintf(key, sizeof(key), "remote.%s.url", option_origin);
479 git_config_set(key, repo);
481 snprintf(key, sizeof(key), "remote.%s.fetch", option_origin);
482 snprintf(value, sizeof(value),
483 "+%s*:%s*", src_ref_prefix, branch_top);
484 git_config_set_multivar(key, value, "^$", 0);
487 refspec.force = 0;
488 refspec.pattern = 1;
489 refspec.src = src_ref_prefix;
490 refspec.dst = branch_top;
492 if (path && !is_bundle)
493 refs = clone_local(path, git_dir);
494 else {
495 struct remote *remote = remote_get(argv[0]);
496 transport = transport_get(remote, remote->url[0]);
498 if (!transport->get_refs_list || !transport->fetch)
499 die("Don't know how to clone %s", transport->url);
501 transport_set_option(transport, TRANS_OPT_KEEP, "yes");
503 if (option_depth)
504 transport_set_option(transport, TRANS_OPT_DEPTH,
505 option_depth);
507 if (option_quiet)
508 transport->verbose = -1;
510 if (option_upload_pack)
511 transport_set_option(transport, TRANS_OPT_UPLOADPACK,
512 option_upload_pack);
514 refs = transport_get_remote_refs(transport);
515 transport_fetch_refs(transport, refs);
518 clear_extra_refs();
520 mapped_refs = write_remote_refs(refs, &refspec, reflog_msg.buf);
522 head_points_at = locate_head(refs, mapped_refs, &remote_head);
524 if (head_points_at) {
525 /* Local default branch link */
526 create_symref("HEAD", head_points_at->name, NULL);
528 if (!option_bare) {
529 struct strbuf head_ref;
530 const char *head = head_points_at->name;
532 if (!prefixcmp(head, "refs/heads/"))
533 head += 11;
535 /* Set up the initial local branch */
537 /* Local branch initial value */
538 update_ref(reflog_msg.buf, "HEAD",
539 head_points_at->old_sha1,
540 NULL, 0, DIE_ON_ERR);
542 strbuf_init(&head_ref, 0);
543 strbuf_addstr(&head_ref, branch_top);
544 strbuf_addstr(&head_ref, "HEAD");
546 /* Remote branch link */
547 create_symref(head_ref.buf,
548 head_points_at->peer_ref->name,
549 reflog_msg.buf);
551 snprintf(key, sizeof(key), "branch.%s.remote", head);
552 git_config_set(key, option_origin);
553 snprintf(key, sizeof(key), "branch.%s.merge", head);
554 git_config_set(key, head_points_at->name);
556 } else if (remote_head) {
557 /* Source had detached HEAD pointing somewhere. */
558 if (!option_bare)
559 update_ref(reflog_msg.buf, "HEAD",
560 remote_head->old_sha1,
561 NULL, REF_NODEREF, DIE_ON_ERR);
562 } else {
563 /* Nothing to checkout out */
564 if (!option_no_checkout)
565 warning("remote HEAD refers to nonexistent ref, "
566 "unable to checkout.\n");
567 option_no_checkout = 1;
570 if (transport)
571 transport_unlock_pack(transport);
573 if (!option_no_checkout) {
574 struct lock_file *lock_file = xcalloc(1, sizeof(struct lock_file));
575 struct unpack_trees_options opts;
576 struct tree *tree;
577 struct tree_desc t;
578 int fd;
580 /* We need to be in the new work tree for the checkout */
581 setup_work_tree();
583 fd = hold_locked_index(lock_file, 1);
585 memset(&opts, 0, sizeof opts);
586 opts.update = 1;
587 opts.merge = 1;
588 opts.fn = oneway_merge;
589 opts.verbose_update = !option_quiet;
590 opts.src_index = &the_index;
591 opts.dst_index = &the_index;
593 tree = parse_tree_indirect(remote_head->old_sha1);
594 parse_tree(tree);
595 init_tree_desc(&t, tree->buffer, tree->size);
596 unpack_trees(1, &t, &opts);
598 if (write_cache(fd, active_cache, active_nr) ||
599 commit_locked_index(lock_file))
600 die("unable to write new index file");
603 strbuf_release(&reflog_msg);
604 junk_pid = 0;
605 return 0;