diff: do not use null sha1 as a sentinel value
[git/git.git] / builtin / clone.c
CommitLineData
8434c2f1
DB
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
c2e86add 11#include "builtin.h"
8434c2f1
DB
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"
3e8aded2 21#include "pack-refs.h"
4a16d072 22#include "sigchain.h"
a9f2c136 23#include "branch.h"
8ef51733 24#include "remote.h"
dfa7a6c5 25#include "run-command.h"
8434c2f1
DB
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 */
35static const char * const builtin_clone_usage[] = {
1b1dd23f 36 "git clone [options] [--] <repo> [<dir>]",
8434c2f1
DB
37 NULL
38};
39
5bd631b3 40static int option_no_checkout, option_bare, option_mirror;
e7fed18a 41static int option_local, option_no_hardlinks, option_shared, option_recursive;
dbc92b07 42static char *option_template, *option_depth;
8434c2f1 43static char *option_origin = NULL;
7a4ee28f 44static char *option_branch = NULL;
b57fb80a 45static const char *real_git_dir;
8434c2f1 46static char *option_upload_pack = "git-upload-pack";
5bd631b3 47static int option_verbosity;
01fdc21f 48static int option_progress = -1;
84054f79 49static struct string_list option_config;
dbc92b07
JH
50static struct string_list option_reference;
51
52static 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}
8434c2f1
DB
60
61static struct option builtin_clone_options[] = {
5bd631b3 62 OPT__VERBOSITY(&option_verbosity),
01fdc21f
CB
63 OPT_BOOL(0, "progress", &option_progress,
64 "force progress reporting"),
8434c2f1
DB
65 OPT_BOOLEAN('n', "no-checkout", &option_no_checkout,
66 "don't create a checkout"),
67 OPT_BOOLEAN(0, "bare", &option_bare, "create a bare repository"),
ebc9d420
JH
68 { OPTION_BOOLEAN, 0, "naked", &option_bare, NULL,
69 "create a bare repository",
70 PARSE_OPT_NOARG | PARSE_OPT_HIDDEN },
bc699afc
JS
71 OPT_BOOLEAN(0, "mirror", &option_mirror,
72 "create a mirror repository (implies bare)"),
8434c2f1
DB
73 OPT_BOOLEAN('l', "local", &option_local,
74 "to clone from a local repository"),
75 OPT_BOOLEAN(0, "no-hardlinks", &option_no_hardlinks,
76 "don't use local hardlinks, always copy"),
77 OPT_BOOLEAN('s', "shared", &option_shared,
78 "setup as shared repository"),
e7fed18a 79 OPT_BOOLEAN(0, "recursive", &option_recursive,
ebc9d420 80 "initialize submodules in the clone"),
3446a54c 81 OPT_BOOLEAN(0, "recurse-submodules", &option_recursive,
ccdd3da6 82 "initialize submodules in the clone"),
5027fa86
MG
83 OPT_STRING(0, "template", &option_template, "template-directory",
84 "directory from which templates will be used"),
dbc92b07
JH
85 OPT_CALLBACK(0 , "reference", &option_reference, "repo",
86 "reference repository", &opt_parse_reference),
a31275d6
CMN
87 OPT_STRING('o', "origin", &option_origin, "name",
88 "use <name> instead of 'origin' to track upstream"),
7a4ee28f
JK
89 OPT_STRING('b', "branch", &option_branch, "branch",
90 "checkout <branch> instead of the remote's HEAD"),
8434c2f1
DB
91 OPT_STRING('u', "upload-pack", &option_upload_pack, "path",
92 "path to git-upload-pack on the remote"),
93 OPT_STRING(0, "depth", &option_depth, "depth",
94 "create a shallow clone of that depth"),
09ffc706 95 OPT_STRING(0, "separate-git-dir", &real_git_dir, "gitdir",
b57fb80a 96 "separate git dir from working tree"),
84054f79
JK
97 OPT_STRING_LIST('c', "config", &option_config, "key=value",
98 "set config inside the new repository"),
8434c2f1
DB
99 OPT_END()
100};
101
e7fed18a
JH
102static const char *argv_submodule[] = {
103 "submodule", "update", "--init", "--recursive", NULL
104};
105
8434c2f1
DB
106static char *get_repo_path(const char *repo, int *is_bundle)
107{
b3256eb8 108 static char *suffix[] = { "/.git", "", ".git/.git", ".git" };
8434c2f1
DB
109 static char *bundle_suffix[] = { ".bundle", "" };
110 struct stat st;
111 int i;
112
113 for (i = 0; i < ARRAY_SIZE(suffix); i++) {
114 const char *path;
115 path = mkpath("%s%s", repo, suffix[i]);
9b0ebc72
NTND
116 if (stat(path, &st))
117 continue;
b3256eb8 118 if (S_ISDIR(st.st_mode) && is_git_directory(path)) {
8434c2f1 119 *is_bundle = 0;
e2a57aac 120 return xstrdup(absolute_path(path));
9b0ebc72
NTND
121 } else if (S_ISREG(st.st_mode) && st.st_size > 8) {
122 /* Is it a "gitfile"? */
123 char signature[8];
124 int len, fd = open(path, O_RDONLY);
125 if (fd < 0)
126 continue;
127 len = read_in_full(fd, signature, 8);
128 close(fd);
129 if (len != 8 || strncmp(signature, "gitdir: ", 8))
130 continue;
131 path = read_gitfile(path);
132 if (path) {
133 *is_bundle = 0;
134 return xstrdup(absolute_path(path));
135 }
8434c2f1
DB
136 }
137 }
138
139 for (i = 0; i < ARRAY_SIZE(bundle_suffix); i++) {
140 const char *path;
141 path = mkpath("%s%s", repo, bundle_suffix[i]);
142 if (!stat(path, &st) && S_ISREG(st.st_mode)) {
143 *is_bundle = 1;
e2a57aac 144 return xstrdup(absolute_path(path));
8434c2f1
DB
145 }
146 }
147
148 return NULL;
149}
150
6612f877 151static char *guess_dir_name(const char *repo, int is_bundle, int is_bare)
8434c2f1 152{
b8c5db35 153 const char *end = repo + strlen(repo), *start;
8a94bc7b 154 char *dir;
b8c5db35
JS
155
156 /*
8a94bc7b 157 * Strip trailing spaces, slashes and /.git
b8c5db35 158 */
8a94bc7b 159 while (repo < end && (is_dir_sep(end[-1]) || isspace(end[-1])))
b8c5db35
JS
160 end--;
161 if (end - repo > 5 && is_dir_sep(end[-5]) &&
162 !strncmp(end - 4, ".git", 4)) {
163 end -= 5;
164 while (repo < end && is_dir_sep(end[-1]))
165 end--;
166 }
167
168 /*
169 * Find last component, but be prepared that repo could have
170 * the form "remote.example.com:foo.git", i.e. no slash
171 * in the directory part.
172 */
173 start = end;
174 while (repo < start && !is_dir_sep(start[-1]) && start[-1] != ':')
175 start--;
176
177 /*
178 * Strip .{bundle,git}.
179 */
180 if (is_bundle) {
181 if (end - start > 7 && !strncmp(end - 7, ".bundle", 7))
182 end -= 7;
183 } else {
184 if (end - start > 4 && !strncmp(end - 4, ".git", 4))
185 end -= 4;
8434c2f1
DB
186 }
187
6612f877 188 if (is_bare) {
32716a2c
MV
189 struct strbuf result = STRBUF_INIT;
190 strbuf_addf(&result, "%.*s.git", (int)(end - start), start);
2af202be 191 dir = strbuf_detach(&result, NULL);
8a94bc7b
AR
192 } else
193 dir = xstrndup(start, end - start);
194 /*
195 * Replace sequences of 'control' characters and whitespace
196 * with one ascii space, remove leading and trailing spaces.
197 */
198 if (*dir) {
199 char *out = dir;
200 int prev_space = 1 /* strip leading whitespace */;
201 for (end = dir; *end; ++end) {
202 char ch = *end;
203 if ((unsigned char)ch < '\x20')
204 ch = '\x20';
205 if (isspace(ch)) {
206 if (prev_space)
207 continue;
208 prev_space = 1;
209 } else
210 prev_space = 0;
211 *out++ = ch;
212 }
213 *out = '\0';
214 if (out > dir && prev_space)
215 out[-1] = '\0';
6612f877 216 }
8a94bc7b 217 return dir;
8434c2f1
DB
218}
219
44a68fd5
CB
220static void strip_trailing_slashes(char *dir)
221{
222 char *end = dir + strlen(dir);
223
224 while (dir < end - 1 && is_dir_sep(end[-1]))
225 end--;
226 *end = '\0';
227}
228
dbc92b07 229static int add_one_reference(struct string_list_item *item, void *cb_data)
8434c2f1 230{
e6baf4a1
JH
231 char *ref_git;
232 struct strbuf alternate = STRBUF_INIT;
8434c2f1
DB
233 struct remote *remote;
234 struct transport *transport;
235 const struct ref *extra;
236
e6baf4a1
JH
237 /* Beware: real_path() and mkpath() return static buffer */
238 ref_git = xstrdup(real_path(item->string));
239 if (is_directory(mkpath("%s/.git/objects", ref_git))) {
240 char *ref_git_git = xstrdup(mkpath("%s/.git", ref_git));
241 free(ref_git);
242 ref_git = ref_git_git;
243 } else if (!is_directory(mkpath("%s/objects", ref_git)))
e84d7b74 244 die(_("reference repository '%s' is not a local directory."),
dbc92b07 245 item->string);
8434c2f1 246
e6baf4a1
JH
247 strbuf_addf(&alternate, "%s/objects", ref_git);
248 add_to_alternates_file(alternate.buf);
249 strbuf_release(&alternate);
8434c2f1 250
e6baf4a1
JH
251 remote = remote_get(ref_git);
252 transport = transport_get(remote, ref_git);
8434c2f1
DB
253 for (extra = transport_get_remote_refs(transport); extra;
254 extra = extra->next)
255 add_extra_ref(extra->name, extra->old_sha1, 0);
256
257 transport_disconnect(transport);
e6baf4a1 258 free(ref_git);
dbc92b07
JH
259 return 0;
260}
8434c2f1 261
dbc92b07
JH
262static void setup_reference(void)
263{
264 for_each_string_list(&option_reference, add_one_reference, NULL);
8434c2f1
DB
265}
266
e6baf4a1
JH
267static 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
301static void copy_or_link_directory(struct strbuf *src, struct strbuf *dest,
302 const char *src_repo, int src_baselen)
8434c2f1
DB
303{
304 struct dirent *de;
305 struct stat buf;
306 int src_len, dest_len;
307 DIR *dir;
308
b9e125e0 309 dir = opendir(src->buf);
8434c2f1 310 if (!dir)
e84d7b74 311 die_errno(_("failed to open '%s'"), src->buf);
8434c2f1 312
b9e125e0 313 if (mkdir(dest->buf, 0777)) {
8434c2f1 314 if (errno != EEXIST)
e84d7b74 315 die_errno(_("failed to create directory '%s'"), dest->buf);
b9e125e0 316 else if (stat(dest->buf, &buf))
e84d7b74 317 die_errno(_("failed to stat '%s'"), dest->buf);
8434c2f1 318 else if (!S_ISDIR(buf.st_mode))
e84d7b74 319 die(_("%s exists and is not a directory"), dest->buf);
8434c2f1
DB
320 }
321
b9e125e0
MV
322 strbuf_addch(src, '/');
323 src_len = src->len;
324 strbuf_addch(dest, '/');
325 dest_len = dest->len;
8434c2f1
DB
326
327 while ((de = readdir(dir)) != NULL) {
b9e125e0
MV
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)) {
e84d7b74 333 warning (_("failed to stat %s\n"), src->buf);
8434c2f1
DB
334 continue;
335 }
336 if (S_ISDIR(buf.st_mode)) {
337 if (de->d_name[0] != '.')
e6baf4a1
JH
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);
8434c2f1
DB
346 continue;
347 }
348
b9e125e0 349 if (unlink(dest->buf) && errno != ENOENT)
e84d7b74 350 die_errno(_("failed to unlink '%s'"), dest->buf);
fdabc242 351 if (!option_no_hardlinks) {
b9e125e0 352 if (!link(src->buf, dest->buf))
fdabc242
DB
353 continue;
354 if (option_local)
e84d7b74 355 die_errno(_("failed to create link '%s'"), dest->buf);
fdabc242 356 option_no_hardlinks = 1;
8434c2f1 357 }
f7835a25 358 if (copy_file_with_time(dest->buf, src->buf, 0666))
e84d7b74 359 die_errno(_("failed to copy file to '%s'"), dest->buf);
8434c2f1 360 }
689ef4d4 361 closedir(dir);
8434c2f1
DB
362}
363
364static const struct ref *clone_local(const char *src_repo,
365 const char *dest_repo)
366{
367 const struct ref *ret;
8434c2f1
DB
368 struct remote *remote;
369 struct transport *transport;
370
e6baf4a1
JH
371 if (option_shared) {
372 struct strbuf alt = STRBUF_INIT;
373 strbuf_addf(&alt, "%s/objects", src_repo);
374 add_to_alternates_file(alt.buf);
375 strbuf_release(&alt);
376 } else {
377 struct strbuf src = STRBUF_INIT;
378 struct strbuf dest = STRBUF_INIT;
b9e125e0
MV
379 strbuf_addf(&src, "%s/objects", src_repo);
380 strbuf_addf(&dest, "%s/objects", dest_repo);
e6baf4a1 381 copy_or_link_directory(&src, &dest, src_repo, src.len);
b9e125e0
MV
382 strbuf_release(&src);
383 strbuf_release(&dest);
8434c2f1
DB
384 }
385
386 remote = remote_get(src_repo);
387 transport = transport_get(remote, src_repo);
388 ret = transport_get_remote_refs(transport);
389 transport_disconnect(transport);
28ba96ab 390 if (0 <= option_verbosity)
e84d7b74 391 printf(_("done.\n"));
8434c2f1
DB
392 return ret;
393}
394
395static const char *junk_work_tree;
396static const char *junk_git_dir;
e161acd1 397static pid_t junk_pid;
8434c2f1
DB
398
399static void remove_junk(void)
400{
f285a2d7 401 struct strbuf sb = STRBUF_INIT;
8434c2f1
DB
402 if (getpid() != junk_pid)
403 return;
8434c2f1
DB
404 if (junk_git_dir) {
405 strbuf_addstr(&sb, junk_git_dir);
406 remove_dir_recursively(&sb, 0);
407 strbuf_reset(&sb);
408 }
409 if (junk_work_tree) {
410 strbuf_addstr(&sb, junk_work_tree);
411 remove_dir_recursively(&sb, 0);
412 strbuf_reset(&sb);
413 }
414}
415
416static void remove_junk_on_signal(int signo)
417{
418 remove_junk();
4a16d072 419 sigchain_pop(signo);
8434c2f1
DB
420 raise(signo);
421}
422
5bdc32d3
NP
423static struct ref *wanted_peer_refs(const struct ref *refs,
424 struct refspec *refspec)
8434c2f1 425{
c1921c18
JK
426 struct ref *head = copy_ref(find_ref_by_name(refs, "HEAD"));
427 struct ref *local_refs = head;
428 struct ref **tail = head ? &head->next : &local_refs;
8434c2f1
DB
429
430 get_fetch_map(refs, refspec, &tail, 0);
468386a9
JS
431 if (!option_mirror)
432 get_fetch_map(refs, tag_refspec, &tail, 0);
8434c2f1 433
5bdc32d3
NP
434 return local_refs;
435}
436
437static void write_remote_refs(const struct ref *local_refs)
438{
439 const struct ref *r;
440
c1921c18
JK
441 for (r = local_refs; r; r = r->next) {
442 if (!r->peer_ref)
443 continue;
3e8aded2 444 add_extra_ref(r->peer_ref->name, r->old_sha1, 0);
c1921c18 445 }
3e8aded2
JH
446
447 pack_refs(PACK_REFS_ALL);
448 clear_extra_refs();
8434c2f1
DB
449}
450
84054f79
JK
451static int write_one_config(const char *key, const char *value, void *data)
452{
453 return git_config_set_multivar(key, value ? value : "true", "^$", 0);
454}
455
456static void write_config(struct string_list *config)
457{
458 int i;
459
460 for (i = 0; i < config->nr; i++) {
461 if (git_config_parse_parameter(config->items[i].string,
462 write_one_config, NULL) < 0)
463 die("unable to write parameters to config file");
464 }
465}
466
8434c2f1
DB
467int cmd_clone(int argc, const char **argv, const char *prefix)
468{
24c61c44 469 int is_bundle = 0, is_local;
8434c2f1
DB
470 struct stat buf;
471 const char *repo_name, *repo, *work_tree, *git_dir;
472 char *path, *dir;
55892d23 473 int dest_exists;
37148311 474 const struct ref *refs, *remote_head;
7a4ee28f
JK
475 const struct ref *remote_head_points_at;
476 const struct ref *our_head_points_at;
37148311 477 struct ref *mapped_refs;
b5ff37ac
MV
478 struct strbuf key = STRBUF_INIT, value = STRBUF_INIT;
479 struct strbuf branch_top = STRBUF_INIT, reflog_msg = STRBUF_INIT;
1db4a75c 480 struct transport *transport = NULL;
bc699afc 481 char *src_ref_prefix = "refs/heads/";
dfa7a6c5 482 int err = 0;
8434c2f1 483
689f0396
DB
484 struct refspec *refspec;
485 const char *fetch_pattern;
8434c2f1
DB
486
487 junk_pid = getpid();
488
bbc30f99 489 packet_trace_identity("clone");
37782920 490 argc = parse_options(argc, argv, prefix, builtin_clone_options,
8434c2f1
DB
491 builtin_clone_usage, 0);
492
d52dc4b1 493 if (argc > 2)
e84d7b74 494 usage_msg_opt(_("Too many arguments."),
d52dc4b1
JN
495 builtin_clone_usage, builtin_clone_options);
496
8434c2f1 497 if (argc == 0)
e84d7b74 498 usage_msg_opt(_("You must specify a repository to clone."),
d52dc4b1 499 builtin_clone_usage, builtin_clone_options);
8434c2f1 500
bc699afc
JS
501 if (option_mirror)
502 option_bare = 1;
503
8434c2f1
DB
504 if (option_bare) {
505 if (option_origin)
e84d7b74 506 die(_("--bare and --origin %s options are incompatible."),
8434c2f1
DB
507 option_origin);
508 option_no_checkout = 1;
8434c2f1
DB
509 }
510
511 if (!option_origin)
512 option_origin = "origin";
513
514 repo_name = argv[0];
515
516 path = get_repo_path(repo_name, &is_bundle);
517 if (path)
e2a57aac 518 repo = xstrdup(absolute_path(repo_name));
8434c2f1 519 else if (!strchr(repo_name, ':'))
d3e1ddfd 520 die(_("repository '%s' does not exist"), repo_name);
8434c2f1
DB
521 else
522 repo = repo_name;
24c61c44
NTND
523 is_local = path && !is_bundle;
524 if (is_local && option_depth)
e84d7b74 525 warning(_("--depth is ignored in local clones; use file:// instead."));
8434c2f1
DB
526
527 if (argc == 2)
528 dir = xstrdup(argv[1]);
529 else
6612f877 530 dir = guess_dir_name(repo_name, is_bundle, option_bare);
44a68fd5 531 strip_trailing_slashes(dir);
8434c2f1 532
55892d23
AP
533 dest_exists = !stat(dir, &buf);
534 if (dest_exists && !is_empty_dir(dir))
e84d7b74
ÆAB
535 die(_("destination path '%s' already exists and is not "
536 "an empty directory."), dir);
8434c2f1 537
8434c2f1
DB
538 strbuf_addf(&reflog_msg, "clone: from %s", repo);
539
540 if (option_bare)
541 work_tree = NULL;
542 else {
543 work_tree = getenv("GIT_WORK_TREE");
544 if (work_tree && !stat(work_tree, &buf))
e84d7b74 545 die(_("working tree '%s' already exists."), work_tree);
8434c2f1
DB
546 }
547
548 if (option_bare || work_tree)
549 git_dir = xstrdup(dir);
550 else {
551 work_tree = dir;
552 git_dir = xstrdup(mkpath("%s/.git", dir));
553 }
554
555 if (!option_bare) {
556 junk_work_tree = work_tree;
8e21d63b 557 if (safe_create_leading_directories_const(work_tree) < 0)
e84d7b74 558 die_errno(_("could not create leading directories of '%s'"),
d824cbba 559 work_tree);
55892d23 560 if (!dest_exists && mkdir(work_tree, 0755))
e84d7b74 561 die_errno(_("could not create work tree dir '%s'."),
d824cbba 562 work_tree);
8434c2f1
DB
563 set_git_work_tree(work_tree);
564 }
565 junk_git_dir = git_dir;
566 atexit(remove_junk);
57b235a4 567 sigchain_push_common(remove_junk_on_signal);
8434c2f1 568
50b5f420 569 setenv(CONFIG_ENVIRONMENT, mkpath("%s/config", git_dir), 1);
8434c2f1 570
8e21d63b 571 if (safe_create_leading_directories_const(git_dir) < 0)
e84d7b74 572 die(_("could not create leading directories of '%s'"), git_dir);
b57fb80a
NTND
573
574 set_git_dir_init(git_dir, real_git_dir, 0);
575 if (real_git_dir)
576 git_dir = real_git_dir;
8434c2f1 577
3781fcce
ÆAB
578 if (0 <= option_verbosity) {
579 if (option_bare)
8debf696 580 printf(_("Cloning into bare repository '%s'...\n"), dir);
3781fcce 581 else
8debf696 582 printf(_("Cloning into '%s'...\n"), dir);
3781fcce 583 }
28ba96ab 584 init_db(option_template, INIT_DB_QUIET);
84054f79 585 write_config(&option_config);
8434c2f1 586
5b8063b5
JS
587 /*
588 * At this point, the config exists, so we do not need the
589 * environment variable. We actually need to unset it, too, to
590 * re-enable parsing of the global configs.
591 */
592 unsetenv(CONFIG_ENVIRONMENT);
593
9bd81e42 594 git_config(git_default_config, NULL);
8434c2f1
DB
595
596 if (option_bare) {
bc699afc
JS
597 if (option_mirror)
598 src_ref_prefix = "refs/";
b5ff37ac 599 strbuf_addstr(&branch_top, src_ref_prefix);
8434c2f1
DB
600
601 git_config_set("core.bare", "true");
602 } else {
b5ff37ac 603 strbuf_addf(&branch_top, "refs/remotes/%s/", option_origin);
bc699afc 604 }
8434c2f1 605
689f0396
DB
606 strbuf_addf(&value, "+%s*:%s*", src_ref_prefix, branch_top.buf);
607
bc699afc 608 if (option_mirror || !option_bare) {
8434c2f1 609 /* Configure the remote */
689f0396
DB
610 strbuf_addf(&key, "remote.%s.fetch", option_origin);
611 git_config_set_multivar(key.buf, value.buf, "^$", 0);
612 strbuf_reset(&key);
613
bc699afc 614 if (option_mirror) {
b5ff37ac
MV
615 strbuf_addf(&key, "remote.%s.mirror", option_origin);
616 git_config_set(key.buf, "true");
617 strbuf_reset(&key);
bc699afc 618 }
8434c2f1
DB
619 }
620
df61c889
SR
621 strbuf_addf(&key, "remote.%s.url", option_origin);
622 git_config_set(key.buf, repo);
623 strbuf_reset(&key);
624
dbc92b07
JH
625 if (option_reference.nr)
626 setup_reference();
766ac6a6 627
689f0396
DB
628 fetch_pattern = value.buf;
629 refspec = parse_fetch_refspec(1, &fetch_pattern);
630
631 strbuf_reset(&value);
8434c2f1 632
24c61c44 633 if (is_local) {
8434c2f1 634 refs = clone_local(path, git_dir);
5bdc32d3
NP
635 mapped_refs = wanted_peer_refs(refs, refspec);
636 } else {
766ac6a6 637 struct remote *remote = remote_get(option_origin);
1db4a75c 638 transport = transport_get(remote, remote->url[0]);
8434c2f1 639
37b78c25 640 if (!transport->get_refs_list || !transport->fetch)
e84d7b74 641 die(_("Don't know how to clone %s"), transport->url);
37b78c25 642
8434c2f1
DB
643 transport_set_option(transport, TRANS_OPT_KEEP, "yes");
644
645 if (option_depth)
646 transport_set_option(transport, TRANS_OPT_DEPTH,
647 option_depth);
648
d01b3c02 649 transport_set_verbosity(transport, option_verbosity, option_progress);
8434c2f1 650
837c8767
SH
651 if (option_upload_pack)
652 transport_set_option(transport, TRANS_OPT_UPLOADPACK,
653 option_upload_pack);
654
8434c2f1 655 refs = transport_get_remote_refs(transport);
5bdc32d3
NP
656 if (refs) {
657 mapped_refs = wanted_peer_refs(refs, refspec);
658 transport_fetch_refs(transport, mapped_refs);
659 }
8434c2f1
DB
660 }
661
86ac7518
SR
662 if (refs) {
663 clear_extra_refs();
8434c2f1 664
5bdc32d3 665 write_remote_refs(mapped_refs);
8434c2f1 666
6cb4e6cc 667 remote_head = find_ref_by_name(refs, "HEAD");
7a4ee28f
JK
668 remote_head_points_at =
669 guess_remote_head(remote_head, mapped_refs, 0);
670
671 if (option_branch) {
672 struct strbuf head = STRBUF_INIT;
673 strbuf_addstr(&head, src_ref_prefix);
674 strbuf_addstr(&head, option_branch);
675 our_head_points_at =
676 find_ref_by_name(mapped_refs, head.buf);
677 strbuf_release(&head);
678
679 if (!our_head_points_at) {
e84d7b74
ÆAB
680 warning(_("Remote branch %s not found in "
681 "upstream %s, using HEAD instead"),
7a4ee28f
JK
682 option_branch, option_origin);
683 our_head_points_at = remote_head_points_at;
684 }
685 }
686 else
687 our_head_points_at = remote_head_points_at;
86ac7518
SR
688 }
689 else {
e84d7b74 690 warning(_("You appear to have cloned an empty repository."));
7a4ee28f
JK
691 our_head_points_at = NULL;
692 remote_head_points_at = NULL;
86ac7518
SR
693 remote_head = NULL;
694 option_no_checkout = 1;
5cd12b85 695 if (!option_bare)
a9f2c136 696 install_branch_config(0, "master", option_origin,
5cd12b85 697 "refs/heads/master");
86ac7518 698 }
8434c2f1 699
7a4ee28f
JK
700 if (remote_head_points_at && !option_bare) {
701 struct strbuf head_ref = STRBUF_INIT;
702 strbuf_addstr(&head_ref, branch_top.buf);
703 strbuf_addstr(&head_ref, "HEAD");
704 create_symref(head_ref.buf,
705 remote_head_points_at->peer_ref->name,
706 reflog_msg.buf);
707 }
8434c2f1 708
7a4ee28f
JK
709 if (our_head_points_at) {
710 /* Local default branch link */
711 create_symref("HEAD", our_head_points_at->name, NULL);
8434c2f1 712 if (!option_bare) {
7a4ee28f
JK
713 const char *head = skip_prefix(our_head_points_at->name,
714 "refs/heads/");
8434c2f1 715 update_ref(reflog_msg.buf, "HEAD",
7a4ee28f 716 our_head_points_at->old_sha1,
8434c2f1 717 NULL, 0, DIE_ON_ERR);
a9f2c136 718 install_branch_config(0, head, option_origin,
7a4ee28f 719 our_head_points_at->name);
8434c2f1
DB
720 }
721 } else if (remote_head) {
722 /* Source had detached HEAD pointing somewhere. */
7a4ee28f 723 if (!option_bare) {
8434c2f1
DB
724 update_ref(reflog_msg.buf, "HEAD",
725 remote_head->old_sha1,
726 NULL, REF_NODEREF, DIE_ON_ERR);
7a4ee28f
JK
727 our_head_points_at = remote_head;
728 }
8434c2f1
DB
729 } else {
730 /* Nothing to checkout out */
731 if (!option_no_checkout)
e84d7b74
ÆAB
732 warning(_("remote HEAD refers to nonexistent ref, "
733 "unable to checkout.\n"));
8434c2f1
DB
734 option_no_checkout = 1;
735 }
736
12d49966 737 if (transport) {
1db4a75c 738 transport_unlock_pack(transport);
12d49966
JK
739 transport_disconnect(transport);
740 }
1db4a75c 741
8434c2f1
DB
742 if (!option_no_checkout) {
743 struct lock_file *lock_file = xcalloc(1, sizeof(struct lock_file));
744 struct unpack_trees_options opts;
745 struct tree *tree;
746 struct tree_desc t;
747 int fd;
748
749 /* We need to be in the new work tree for the checkout */
750 setup_work_tree();
751
752 fd = hold_locked_index(lock_file, 1);
753
754 memset(&opts, 0, sizeof opts);
755 opts.update = 1;
a73bc127
JS
756 opts.merge = 1;
757 opts.fn = oneway_merge;
5bd631b3 758 opts.verbose_update = (option_verbosity > 0);
a73bc127 759 opts.src_index = &the_index;
8434c2f1
DB
760 opts.dst_index = &the_index;
761
7a4ee28f 762 tree = parse_tree_indirect(our_head_points_at->old_sha1);
8434c2f1
DB
763 parse_tree(tree);
764 init_tree_desc(&t, tree->buffer, tree->size);
765 unpack_trees(1, &t, &opts);
766
767 if (write_cache(fd, active_cache, active_nr) ||
768 commit_locked_index(lock_file))
e84d7b74 769 die(_("unable to write new index file"));
dfa7a6c5
JK
770
771 err |= run_hook(NULL, "post-checkout", sha1_to_hex(null_sha1),
d01a8e32
BS
772 sha1_to_hex(our_head_points_at->old_sha1), "1",
773 NULL);
e7fed18a
JH
774
775 if (!err && option_recursive)
776 err = run_command_v_opt(argv_submodule, RUN_GIT_CMD);
8434c2f1
DB
777 }
778
779 strbuf_release(&reflog_msg);
b5ff37ac
MV
780 strbuf_release(&branch_top);
781 strbuf_release(&key);
782 strbuf_release(&value);
8434c2f1 783 junk_pid = 0;
dfa7a6c5 784 return err;
8434c2f1 785}