add 'git credential' plumbing command
[git/git.git] / builtin / clone.c
CommitLineData
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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"
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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"
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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>]",
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37 NULL
38};
39
3e6e0edd 40static int option_no_checkout, option_bare, option_mirror, option_single_branch = -1;
189260b1 41static int option_local = -1, 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}
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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"),
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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)"),
189260b1
JK
73 OPT_BOOL('l', "local", &option_local,
74 "to clone from a local repository"),
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DB
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"),
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89 OPT_STRING('b', "branch", &option_branch, "branch",
90 "checkout <branch> instead of the remote's HEAD"),
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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"),
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NTND
95 OPT_BOOL(0, "single-branch", &option_single_branch,
96 "clone only one branch, HEAD or --branch"),
09ffc706 97 OPT_STRING(0, "separate-git-dir", &real_git_dir, "gitdir",
b57fb80a 98 "separate git dir from working tree"),
84054f79
JK
99 OPT_STRING_LIST('c', "config", &option_config, "key=value",
100 "set config inside the new repository"),
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101 OPT_END()
102};
103
e7fed18a
JH
104static const char *argv_submodule[] = {
105 "submodule", "update", "--init", "--recursive", NULL
106};
107
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108static char *get_repo_path(const char *repo, int *is_bundle)
109{
b3256eb8 110 static char *suffix[] = { "/.git", "", ".git/.git", ".git" };
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111 static char *bundle_suffix[] = { ".bundle", "" };
112 struct stat st;
113 int i;
114
115 for (i = 0; i < ARRAY_SIZE(suffix); i++) {
116 const char *path;
117 path = mkpath("%s%s", repo, suffix[i]);
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NTND
118 if (stat(path, &st))
119 continue;
b3256eb8 120 if (S_ISDIR(st.st_mode) && is_git_directory(path)) {
8434c2f1 121 *is_bundle = 0;
e2a57aac 122 return xstrdup(absolute_path(path));
9b0ebc72
NTND
123 } else if (S_ISREG(st.st_mode) && st.st_size > 8) {
124 /* Is it a "gitfile"? */
125 char signature[8];
126 int len, fd = open(path, O_RDONLY);
127 if (fd < 0)
128 continue;
129 len = read_in_full(fd, signature, 8);
130 close(fd);
131 if (len != 8 || strncmp(signature, "gitdir: ", 8))
132 continue;
133 path = read_gitfile(path);
134 if (path) {
135 *is_bundle = 0;
136 return xstrdup(absolute_path(path));
137 }
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DB
138 }
139 }
140
141 for (i = 0; i < ARRAY_SIZE(bundle_suffix); i++) {
142 const char *path;
143 path = mkpath("%s%s", repo, bundle_suffix[i]);
144 if (!stat(path, &st) && S_ISREG(st.st_mode)) {
145 *is_bundle = 1;
e2a57aac 146 return xstrdup(absolute_path(path));
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DB
147 }
148 }
149
150 return NULL;
151}
152
6612f877 153static char *guess_dir_name(const char *repo, int is_bundle, int is_bare)
8434c2f1 154{
b8c5db35 155 const char *end = repo + strlen(repo), *start;
8a94bc7b 156 char *dir;
b8c5db35
JS
157
158 /*
8a94bc7b 159 * Strip trailing spaces, slashes and /.git
b8c5db35 160 */
8a94bc7b 161 while (repo < end && (is_dir_sep(end[-1]) || isspace(end[-1])))
b8c5db35
JS
162 end--;
163 if (end - repo > 5 && is_dir_sep(end[-5]) &&
164 !strncmp(end - 4, ".git", 4)) {
165 end -= 5;
166 while (repo < end && is_dir_sep(end[-1]))
167 end--;
168 }
169
170 /*
171 * Find last component, but be prepared that repo could have
172 * the form "remote.example.com:foo.git", i.e. no slash
173 * in the directory part.
174 */
175 start = end;
176 while (repo < start && !is_dir_sep(start[-1]) && start[-1] != ':')
177 start--;
178
179 /*
180 * Strip .{bundle,git}.
181 */
182 if (is_bundle) {
183 if (end - start > 7 && !strncmp(end - 7, ".bundle", 7))
184 end -= 7;
185 } else {
186 if (end - start > 4 && !strncmp(end - 4, ".git", 4))
187 end -= 4;
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DB
188 }
189
6612f877 190 if (is_bare) {
32716a2c
MV
191 struct strbuf result = STRBUF_INIT;
192 strbuf_addf(&result, "%.*s.git", (int)(end - start), start);
2af202be 193 dir = strbuf_detach(&result, NULL);
8a94bc7b
AR
194 } else
195 dir = xstrndup(start, end - start);
196 /*
197 * Replace sequences of 'control' characters and whitespace
198 * with one ascii space, remove leading and trailing spaces.
199 */
200 if (*dir) {
201 char *out = dir;
202 int prev_space = 1 /* strip leading whitespace */;
203 for (end = dir; *end; ++end) {
204 char ch = *end;
205 if ((unsigned char)ch < '\x20')
206 ch = '\x20';
207 if (isspace(ch)) {
208 if (prev_space)
209 continue;
210 prev_space = 1;
211 } else
212 prev_space = 0;
213 *out++ = ch;
214 }
215 *out = '\0';
216 if (out > dir && prev_space)
217 out[-1] = '\0';
6612f877 218 }
8a94bc7b 219 return dir;
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DB
220}
221
44a68fd5
CB
222static void strip_trailing_slashes(char *dir)
223{
224 char *end = dir + strlen(dir);
225
226 while (dir < end - 1 && is_dir_sep(end[-1]))
227 end--;
228 *end = '\0';
229}
230
dbc92b07 231static int add_one_reference(struct string_list_item *item, void *cb_data)
8434c2f1 232{
e6baf4a1
JH
233 char *ref_git;
234 struct strbuf alternate = STRBUF_INIT;
8434c2f1 235
e6baf4a1
JH
236 /* Beware: real_path() and mkpath() return static buffer */
237 ref_git = xstrdup(real_path(item->string));
238 if (is_directory(mkpath("%s/.git/objects", ref_git))) {
239 char *ref_git_git = xstrdup(mkpath("%s/.git", ref_git));
240 free(ref_git);
241 ref_git = ref_git_git;
242 } else if (!is_directory(mkpath("%s/objects", ref_git)))
e84d7b74 243 die(_("reference repository '%s' is not a local directory."),
dbc92b07 244 item->string);
8434c2f1 245
e6baf4a1
JH
246 strbuf_addf(&alternate, "%s/objects", ref_git);
247 add_to_alternates_file(alternate.buf);
248 strbuf_release(&alternate);
e6baf4a1 249 free(ref_git);
dbc92b07
JH
250 return 0;
251}
8434c2f1 252
dbc92b07
JH
253static void setup_reference(void)
254{
255 for_each_string_list(&option_reference, add_one_reference, NULL);
8434c2f1
DB
256}
257
e6baf4a1
JH
258static void copy_alternates(struct strbuf *src, struct strbuf *dst,
259 const char *src_repo)
260{
261 /*
262 * Read from the source objects/info/alternates file
263 * and copy the entries to corresponding file in the
264 * destination repository with add_to_alternates_file().
265 * Both src and dst have "$path/objects/info/alternates".
266 *
267 * Instead of copying bit-for-bit from the original,
268 * we need to append to existing one so that the already
269 * created entry via "clone -s" is not lost, and also
270 * to turn entries with paths relative to the original
271 * absolute, so that they can be used in the new repository.
272 */
273 FILE *in = fopen(src->buf, "r");
274 struct strbuf line = STRBUF_INIT;
275
276 while (strbuf_getline(&line, in, '\n') != EOF) {
277 char *abs_path, abs_buf[PATH_MAX];
278 if (!line.len || line.buf[0] == '#')
279 continue;
280 if (is_absolute_path(line.buf)) {
281 add_to_alternates_file(line.buf);
282 continue;
283 }
284 abs_path = mkpath("%s/objects/%s", src_repo, line.buf);
285 normalize_path_copy(abs_buf, abs_path);
286 add_to_alternates_file(abs_buf);
287 }
288 strbuf_release(&line);
289 fclose(in);
290}
291
292static void copy_or_link_directory(struct strbuf *src, struct strbuf *dest,
293 const char *src_repo, int src_baselen)
8434c2f1
DB
294{
295 struct dirent *de;
296 struct stat buf;
297 int src_len, dest_len;
298 DIR *dir;
299
b9e125e0 300 dir = opendir(src->buf);
8434c2f1 301 if (!dir)
e84d7b74 302 die_errno(_("failed to open '%s'"), src->buf);
8434c2f1 303
b9e125e0 304 if (mkdir(dest->buf, 0777)) {
8434c2f1 305 if (errno != EEXIST)
e84d7b74 306 die_errno(_("failed to create directory '%s'"), dest->buf);
b9e125e0 307 else if (stat(dest->buf, &buf))
e84d7b74 308 die_errno(_("failed to stat '%s'"), dest->buf);
8434c2f1 309 else if (!S_ISDIR(buf.st_mode))
e84d7b74 310 die(_("%s exists and is not a directory"), dest->buf);
8434c2f1
DB
311 }
312
b9e125e0
MV
313 strbuf_addch(src, '/');
314 src_len = src->len;
315 strbuf_addch(dest, '/');
316 dest_len = dest->len;
8434c2f1
DB
317
318 while ((de = readdir(dir)) != NULL) {
b9e125e0
MV
319 strbuf_setlen(src, src_len);
320 strbuf_addstr(src, de->d_name);
321 strbuf_setlen(dest, dest_len);
322 strbuf_addstr(dest, de->d_name);
323 if (stat(src->buf, &buf)) {
e84d7b74 324 warning (_("failed to stat %s\n"), src->buf);
8434c2f1
DB
325 continue;
326 }
327 if (S_ISDIR(buf.st_mode)) {
328 if (de->d_name[0] != '.')
e6baf4a1
JH
329 copy_or_link_directory(src, dest,
330 src_repo, src_baselen);
331 continue;
332 }
333
334 /* Files that cannot be copied bit-for-bit... */
335 if (!strcmp(src->buf + src_baselen, "/info/alternates")) {
336 copy_alternates(src, dest, src_repo);
8434c2f1
DB
337 continue;
338 }
339
b9e125e0 340 if (unlink(dest->buf) && errno != ENOENT)
e84d7b74 341 die_errno(_("failed to unlink '%s'"), dest->buf);
fdabc242 342 if (!option_no_hardlinks) {
b9e125e0 343 if (!link(src->buf, dest->buf))
fdabc242 344 continue;
189260b1 345 if (option_local > 0)
e84d7b74 346 die_errno(_("failed to create link '%s'"), dest->buf);
fdabc242 347 option_no_hardlinks = 1;
8434c2f1 348 }
f7835a25 349 if (copy_file_with_time(dest->buf, src->buf, 0666))
e84d7b74 350 die_errno(_("failed to copy file to '%s'"), dest->buf);
8434c2f1 351 }
689ef4d4 352 closedir(dir);
8434c2f1
DB
353}
354
6f48d39f 355static void clone_local(const char *src_repo, const char *dest_repo)
8434c2f1 356{
e6baf4a1
JH
357 if (option_shared) {
358 struct strbuf alt = STRBUF_INIT;
359 strbuf_addf(&alt, "%s/objects", src_repo);
360 add_to_alternates_file(alt.buf);
361 strbuf_release(&alt);
362 } else {
363 struct strbuf src = STRBUF_INIT;
364 struct strbuf dest = STRBUF_INIT;
b9e125e0
MV
365 strbuf_addf(&src, "%s/objects", src_repo);
366 strbuf_addf(&dest, "%s/objects", dest_repo);
e6baf4a1 367 copy_or_link_directory(&src, &dest, src_repo, src.len);
b9e125e0
MV
368 strbuf_release(&src);
369 strbuf_release(&dest);
8434c2f1
DB
370 }
371
28ba96ab 372 if (0 <= option_verbosity)
e84d7b74 373 printf(_("done.\n"));
8434c2f1
DB
374}
375
376static const char *junk_work_tree;
377static const char *junk_git_dir;
e161acd1 378static pid_t junk_pid;
8434c2f1
DB
379
380static void remove_junk(void)
381{
f285a2d7 382 struct strbuf sb = STRBUF_INIT;
8434c2f1
DB
383 if (getpid() != junk_pid)
384 return;
8434c2f1
DB
385 if (junk_git_dir) {
386 strbuf_addstr(&sb, junk_git_dir);
387 remove_dir_recursively(&sb, 0);
388 strbuf_reset(&sb);
389 }
390 if (junk_work_tree) {
391 strbuf_addstr(&sb, junk_work_tree);
392 remove_dir_recursively(&sb, 0);
393 strbuf_reset(&sb);
394 }
395}
396
397static void remove_junk_on_signal(int signo)
398{
399 remove_junk();
4a16d072 400 sigchain_pop(signo);
8434c2f1
DB
401 raise(signo);
402}
403
9e585046
NTND
404static struct ref *find_remote_branch(const struct ref *refs, const char *branch)
405{
406 struct ref *ref;
407 struct strbuf head = STRBUF_INIT;
408 strbuf_addstr(&head, "refs/heads/");
409 strbuf_addstr(&head, branch);
410 ref = find_ref_by_name(refs, head.buf);
411 strbuf_release(&head);
5a7d5b68
NTND
412
413 if (ref)
414 return ref;
415
416 strbuf_addstr(&head, "refs/tags/");
417 strbuf_addstr(&head, branch);
418 ref = find_ref_by_name(refs, head.buf);
419 strbuf_release(&head);
420
9e585046
NTND
421 return ref;
422}
423
5bdc32d3
NP
424static struct ref *wanted_peer_refs(const struct ref *refs,
425 struct refspec *refspec)
8434c2f1 426{
c1921c18
JK
427 struct ref *head = copy_ref(find_ref_by_name(refs, "HEAD"));
428 struct ref *local_refs = head;
429 struct ref **tail = head ? &head->next : &local_refs;
8434c2f1 430
3e6e0edd
NTND
431 if (option_single_branch) {
432 struct ref *remote_head = NULL;
433
434 if (!option_branch)
435 remote_head = guess_remote_head(head, refs, 0);
9e585046
NTND
436 else
437 remote_head = find_remote_branch(refs, option_branch);
3e6e0edd
NTND
438
439 if (!remote_head && option_branch)
440 warning(_("Could not find remote branch %s to clone."),
441 option_branch);
5a7d5b68 442 else {
3e6e0edd 443 get_fetch_map(remote_head, refspec, &tail, 0);
5a7d5b68
NTND
444
445 /* if --branch=tag, pull the requested tag explicitly */
446 get_fetch_map(remote_head, tag_refspec, &tail, 0);
447 }
3e6e0edd
NTND
448 } else
449 get_fetch_map(refs, refspec, &tail, 0);
450
451 if (!option_mirror && !option_single_branch)
468386a9 452 get_fetch_map(refs, tag_refspec, &tail, 0);
8434c2f1 453
5bdc32d3
NP
454 return local_refs;
455}
456
457static void write_remote_refs(const struct ref *local_refs)
458{
459 const struct ref *r;
460
c1921c18
JK
461 for (r = local_refs; r; r = r->next) {
462 if (!r->peer_ref)
463 continue;
39ef7fae 464 add_packed_ref(r->peer_ref->name, r->old_sha1);
c1921c18 465 }
3e8aded2
JH
466
467 pack_refs(PACK_REFS_ALL);
8434c2f1
DB
468}
469
3e6e0edd
NTND
470static void write_followtags(const struct ref *refs, const char *msg)
471{
472 const struct ref *ref;
473 for (ref = refs; ref; ref = ref->next) {
474 if (prefixcmp(ref->name, "refs/tags/"))
475 continue;
476 if (!suffixcmp(ref->name, "^{}"))
477 continue;
478 if (!has_sha1_file(ref->old_sha1))
479 continue;
480 update_ref(msg, ref->name, ref->old_sha1,
481 NULL, 0, DIE_ON_ERR);
482 }
483}
484
960b7d1c
NTND
485static void update_remote_refs(const struct ref *refs,
486 const struct ref *mapped_refs,
487 const struct ref *remote_head_points_at,
488 const char *branch_top,
489 const char *msg)
490{
491 if (refs) {
960b7d1c
NTND
492 write_remote_refs(mapped_refs);
493 if (option_single_branch)
494 write_followtags(refs, msg);
495 }
496
497 if (remote_head_points_at && !option_bare) {
498 struct strbuf head_ref = STRBUF_INIT;
499 strbuf_addstr(&head_ref, branch_top);
500 strbuf_addstr(&head_ref, "HEAD");
501 create_symref(head_ref.buf,
502 remote_head_points_at->peer_ref->name,
503 msg);
504 }
505}
506
f034d354
NTND
507static void update_head(const struct ref *our, const struct ref *remote,
508 const char *msg)
509{
9e585046 510 if (our && !prefixcmp(our->name, "refs/heads/")) {
f034d354
NTND
511 /* Local default branch link */
512 create_symref("HEAD", our->name, NULL);
513 if (!option_bare) {
514 const char *head = skip_prefix(our->name, "refs/heads/");
515 update_ref(msg, "HEAD", our->old_sha1, NULL, 0, DIE_ON_ERR);
516 install_branch_config(0, head, option_origin, our->name);
517 }
5a7d5b68
NTND
518 } else if (our) {
519 struct commit *c = lookup_commit_reference(our->old_sha1);
520 /* --branch specifies a non-branch (i.e. tags), detach HEAD */
521 update_ref(msg, "HEAD", c->object.sha1,
522 NULL, REF_NODEREF, DIE_ON_ERR);
f034d354
NTND
523 } else if (remote) {
524 /*
525 * We know remote HEAD points to a non-branch, or
920b691f 526 * HEAD points to a branch but we don't know which one.
f034d354
NTND
527 * Detach HEAD in all these cases.
528 */
529 update_ref(msg, "HEAD", remote->old_sha1,
530 NULL, REF_NODEREF, DIE_ON_ERR);
531 }
532}
533
c39852c1
NTND
534static int checkout(void)
535{
536 unsigned char sha1[20];
537 char *head;
538 struct lock_file *lock_file;
539 struct unpack_trees_options opts;
540 struct tree *tree;
541 struct tree_desc t;
542 int err = 0, fd;
543
544 if (option_no_checkout)
545 return 0;
546
547 head = resolve_refdup("HEAD", sha1, 1, NULL);
548 if (!head) {
549 warning(_("remote HEAD refers to nonexistent ref, "
550 "unable to checkout.\n"));
551 return 0;
552 }
2857093b
NTND
553 if (!strcmp(head, "HEAD")) {
554 if (advice_detached_head)
555 detach_advice(sha1_to_hex(sha1));
556 } else {
c39852c1
NTND
557 if (prefixcmp(head, "refs/heads/"))
558 die(_("HEAD not found below refs/heads!"));
559 }
560 free(head);
561
562 /* We need to be in the new work tree for the checkout */
563 setup_work_tree();
564
565 lock_file = xcalloc(1, sizeof(struct lock_file));
566 fd = hold_locked_index(lock_file, 1);
567
568 memset(&opts, 0, sizeof opts);
569 opts.update = 1;
570 opts.merge = 1;
571 opts.fn = oneway_merge;
8f63da13 572 opts.verbose_update = (option_verbosity >= 0);
c39852c1
NTND
573 opts.src_index = &the_index;
574 opts.dst_index = &the_index;
575
576 tree = parse_tree_indirect(sha1);
577 parse_tree(tree);
578 init_tree_desc(&t, tree->buffer, tree->size);
579 unpack_trees(1, &t, &opts);
580
581 if (write_cache(fd, active_cache, active_nr) ||
582 commit_locked_index(lock_file))
583 die(_("unable to write new index file"));
584
585 err |= run_hook(NULL, "post-checkout", sha1_to_hex(null_sha1),
586 sha1_to_hex(sha1), "1", NULL);
587
588 if (!err && option_recursive)
589 err = run_command_v_opt(argv_submodule, RUN_GIT_CMD);
590
591 return err;
592}
593
84054f79
JK
594static int write_one_config(const char *key, const char *value, void *data)
595{
596 return git_config_set_multivar(key, value ? value : "true", "^$", 0);
597}
598
599static void write_config(struct string_list *config)
600{
601 int i;
602
603 for (i = 0; i < config->nr; i++) {
604 if (git_config_parse_parameter(config->items[i].string,
605 write_one_config, NULL) < 0)
606 die("unable to write parameters to config file");
607 }
608}
609
8434c2f1
DB
610int cmd_clone(int argc, const char **argv, const char *prefix)
611{
24c61c44 612 int is_bundle = 0, is_local;
8434c2f1
DB
613 struct stat buf;
614 const char *repo_name, *repo, *work_tree, *git_dir;
615 char *path, *dir;
55892d23 616 int dest_exists;
37148311 617 const struct ref *refs, *remote_head;
7a4ee28f
JK
618 const struct ref *remote_head_points_at;
619 const struct ref *our_head_points_at;
37148311 620 struct ref *mapped_refs;
90498161 621 const struct ref *ref;
b5ff37ac
MV
622 struct strbuf key = STRBUF_INIT, value = STRBUF_INIT;
623 struct strbuf branch_top = STRBUF_INIT, reflog_msg = STRBUF_INIT;
1db4a75c 624 struct transport *transport = NULL;
9e585046 625 const char *src_ref_prefix = "refs/heads/";
6f48d39f 626 struct remote *remote;
90498161 627 int err = 0, complete_refs_before_fetch = 1;
8434c2f1 628
689f0396
DB
629 struct refspec *refspec;
630 const char *fetch_pattern;
8434c2f1
DB
631
632 junk_pid = getpid();
633
bbc30f99 634 packet_trace_identity("clone");
37782920 635 argc = parse_options(argc, argv, prefix, builtin_clone_options,
8434c2f1
DB
636 builtin_clone_usage, 0);
637
d52dc4b1 638 if (argc > 2)
e84d7b74 639 usage_msg_opt(_("Too many arguments."),
d52dc4b1
JN
640 builtin_clone_usage, builtin_clone_options);
641
8434c2f1 642 if (argc == 0)
e84d7b74 643 usage_msg_opt(_("You must specify a repository to clone."),
d52dc4b1 644 builtin_clone_usage, builtin_clone_options);
8434c2f1 645
3e6e0edd
NTND
646 if (option_single_branch == -1)
647 option_single_branch = option_depth ? 1 : 0;
648
bc699afc
JS
649 if (option_mirror)
650 option_bare = 1;
651
8434c2f1
DB
652 if (option_bare) {
653 if (option_origin)
e84d7b74 654 die(_("--bare and --origin %s options are incompatible."),
8434c2f1
DB
655 option_origin);
656 option_no_checkout = 1;
8434c2f1
DB
657 }
658
659 if (!option_origin)
660 option_origin = "origin";
661
662 repo_name = argv[0];
663
664 path = get_repo_path(repo_name, &is_bundle);
665 if (path)
e2a57aac 666 repo = xstrdup(absolute_path(repo_name));
8434c2f1 667 else if (!strchr(repo_name, ':'))
d3e1ddfd 668 die(_("repository '%s' does not exist"), repo_name);
8434c2f1
DB
669 else
670 repo = repo_name;
189260b1 671 is_local = option_local != 0 && path && !is_bundle;
24c61c44 672 if (is_local && option_depth)
e84d7b74 673 warning(_("--depth is ignored in local clones; use file:// instead."));
8434c2f1
DB
674
675 if (argc == 2)
676 dir = xstrdup(argv[1]);
677 else
6612f877 678 dir = guess_dir_name(repo_name, is_bundle, option_bare);
44a68fd5 679 strip_trailing_slashes(dir);
8434c2f1 680
55892d23
AP
681 dest_exists = !stat(dir, &buf);
682 if (dest_exists && !is_empty_dir(dir))
e84d7b74
ÆAB
683 die(_("destination path '%s' already exists and is not "
684 "an empty directory."), dir);
8434c2f1 685
8434c2f1
DB
686 strbuf_addf(&reflog_msg, "clone: from %s", repo);
687
688 if (option_bare)
689 work_tree = NULL;
690 else {
691 work_tree = getenv("GIT_WORK_TREE");
692 if (work_tree && !stat(work_tree, &buf))
e84d7b74 693 die(_("working tree '%s' already exists."), work_tree);
8434c2f1
DB
694 }
695
696 if (option_bare || work_tree)
697 git_dir = xstrdup(dir);
698 else {
699 work_tree = dir;
700 git_dir = xstrdup(mkpath("%s/.git", dir));
701 }
702
703 if (!option_bare) {
704 junk_work_tree = work_tree;
8e21d63b 705 if (safe_create_leading_directories_const(work_tree) < 0)
e84d7b74 706 die_errno(_("could not create leading directories of '%s'"),
d824cbba 707 work_tree);
55892d23 708 if (!dest_exists && mkdir(work_tree, 0755))
e84d7b74 709 die_errno(_("could not create work tree dir '%s'."),
d824cbba 710 work_tree);
8434c2f1
DB
711 set_git_work_tree(work_tree);
712 }
713 junk_git_dir = git_dir;
714 atexit(remove_junk);
57b235a4 715 sigchain_push_common(remove_junk_on_signal);
8434c2f1 716
50b5f420 717 setenv(CONFIG_ENVIRONMENT, mkpath("%s/config", git_dir), 1);
8434c2f1 718
8e21d63b 719 if (safe_create_leading_directories_const(git_dir) < 0)
e84d7b74 720 die(_("could not create leading directories of '%s'"), git_dir);
b57fb80a
NTND
721
722 set_git_dir_init(git_dir, real_git_dir, 0);
723 if (real_git_dir)
724 git_dir = real_git_dir;
8434c2f1 725
3781fcce
ÆAB
726 if (0 <= option_verbosity) {
727 if (option_bare)
8debf696 728 printf(_("Cloning into bare repository '%s'...\n"), dir);
3781fcce 729 else
8debf696 730 printf(_("Cloning into '%s'...\n"), dir);
3781fcce 731 }
28ba96ab 732 init_db(option_template, INIT_DB_QUIET);
84054f79 733 write_config(&option_config);
8434c2f1 734
5b8063b5
JS
735 /*
736 * At this point, the config exists, so we do not need the
737 * environment variable. We actually need to unset it, too, to
738 * re-enable parsing of the global configs.
739 */
740 unsetenv(CONFIG_ENVIRONMENT);
741
9bd81e42 742 git_config(git_default_config, NULL);
8434c2f1
DB
743
744 if (option_bare) {
bc699afc
JS
745 if (option_mirror)
746 src_ref_prefix = "refs/";
b5ff37ac 747 strbuf_addstr(&branch_top, src_ref_prefix);
8434c2f1
DB
748
749 git_config_set("core.bare", "true");
750 } else {
b5ff37ac 751 strbuf_addf(&branch_top, "refs/remotes/%s/", option_origin);
bc699afc 752 }
8434c2f1 753
689f0396
DB
754 strbuf_addf(&value, "+%s*:%s*", src_ref_prefix, branch_top.buf);
755
bc699afc 756 if (option_mirror || !option_bare) {
8434c2f1 757 /* Configure the remote */
689f0396
DB
758 strbuf_addf(&key, "remote.%s.fetch", option_origin);
759 git_config_set_multivar(key.buf, value.buf, "^$", 0);
760 strbuf_reset(&key);
761
bc699afc 762 if (option_mirror) {
b5ff37ac
MV
763 strbuf_addf(&key, "remote.%s.mirror", option_origin);
764 git_config_set(key.buf, "true");
765 strbuf_reset(&key);
bc699afc 766 }
8434c2f1
DB
767 }
768
df61c889
SR
769 strbuf_addf(&key, "remote.%s.url", option_origin);
770 git_config_set(key.buf, repo);
771 strbuf_reset(&key);
772
dbc92b07
JH
773 if (option_reference.nr)
774 setup_reference();
766ac6a6 775
689f0396
DB
776 fetch_pattern = value.buf;
777 refspec = parse_fetch_refspec(1, &fetch_pattern);
778
779 strbuf_reset(&value);
8434c2f1 780
6f48d39f
NTND
781 remote = remote_get(option_origin);
782 transport = transport_get(remote, remote->url[0]);
8434c2f1 783
6f48d39f 784 if (!is_local) {
37b78c25 785 if (!transport->get_refs_list || !transport->fetch)
e84d7b74 786 die(_("Don't know how to clone %s"), transport->url);
37b78c25 787
8434c2f1
DB
788 transport_set_option(transport, TRANS_OPT_KEEP, "yes");
789
790 if (option_depth)
791 transport_set_option(transport, TRANS_OPT_DEPTH,
792 option_depth);
3e6e0edd
NTND
793 if (option_single_branch)
794 transport_set_option(transport, TRANS_OPT_FOLLOWTAGS, "1");
8434c2f1 795
d01b3c02 796 transport_set_verbosity(transport, option_verbosity, option_progress);
8434c2f1 797
837c8767
SH
798 if (option_upload_pack)
799 transport_set_option(transport, TRANS_OPT_UPLOADPACK,
800 option_upload_pack);
8434c2f1
DB
801 }
802
6f48d39f 803 refs = transport_get_remote_refs(transport);
8434c2f1 804
5b05795c
MH
805 if (refs) {
806 mapped_refs = wanted_peer_refs(refs, refspec);
807 /*
808 * transport_get_remote_refs() may return refs with null sha-1
809 * in mapped_refs (see struct transport->get_refs_list
810 * comment). In that case we need fetch it early because
811 * remote_head code below relies on it.
812 *
813 * for normal clones, transport_get_remote_refs() should
814 * return reliable ref set, we can delay cloning until after
815 * remote HEAD check.
816 */
817 for (ref = refs; ref; ref = ref->next)
818 if (is_null_sha1(ref->old_sha1)) {
819 complete_refs_before_fetch = 0;
820 break;
821 }
90498161 822
5b05795c
MH
823 if (!is_local && !complete_refs_before_fetch)
824 transport_fetch_refs(transport, mapped_refs);
8434c2f1 825
6cb4e6cc 826 remote_head = find_ref_by_name(refs, "HEAD");
7a4ee28f
JK
827 remote_head_points_at =
828 guess_remote_head(remote_head, mapped_refs, 0);
829
830 if (option_branch) {
7a4ee28f 831 our_head_points_at =
9e585046 832 find_remote_branch(mapped_refs, option_branch);
7a4ee28f 833
920b691f
NTND
834 if (!our_head_points_at)
835 die(_("Remote branch %s not found in upstream %s"),
836 option_branch, option_origin);
7a4ee28f
JK
837 }
838 else
839 our_head_points_at = remote_head_points_at;
86ac7518
SR
840 }
841 else {
e84d7b74 842 warning(_("You appear to have cloned an empty repository."));
5b05795c 843 mapped_refs = NULL;
7a4ee28f
JK
844 our_head_points_at = NULL;
845 remote_head_points_at = NULL;
86ac7518
SR
846 remote_head = NULL;
847 option_no_checkout = 1;
5cd12b85 848 if (!option_bare)
a9f2c136 849 install_branch_config(0, "master", option_origin,
5cd12b85 850 "refs/heads/master");
86ac7518 851 }
8434c2f1 852
6f48d39f
NTND
853 if (is_local)
854 clone_local(path, git_dir);
90498161 855 else if (refs && complete_refs_before_fetch)
6f48d39f 856 transport_fetch_refs(transport, mapped_refs);
8434c2f1 857
960b7d1c
NTND
858 update_remote_refs(refs, mapped_refs, remote_head_points_at,
859 branch_top.buf, reflog_msg.buf);
8434c2f1 860
f034d354 861 update_head(our_head_points_at, remote_head, reflog_msg.buf);
1db4a75c 862
6f48d39f
NTND
863 transport_unlock_pack(transport);
864 transport_disconnect(transport);
1db4a75c 865
c39852c1 866 err = checkout();
8434c2f1
DB
867
868 strbuf_release(&reflog_msg);
b5ff37ac
MV
869 strbuf_release(&branch_top);
870 strbuf_release(&key);
871 strbuf_release(&value);
8434c2f1 872 junk_pid = 0;
dfa7a6c5 873 return err;
8434c2f1 874}