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Commit | Line | Data |
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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 | */ | |
35 | static const char * const builtin_clone_usage[] = { | |
1b1dd23f | 36 | "git clone [options] [--] <repo> [<dir>]", |
8434c2f1 DB |
37 | NULL |
38 | }; | |
39 | ||
3e6e0edd | 40 | static int option_no_checkout, option_bare, option_mirror, option_single_branch = -1; |
e7fed18a | 41 | static int option_local, option_no_hardlinks, option_shared, option_recursive; |
dbc92b07 | 42 | static char *option_template, *option_depth; |
8434c2f1 | 43 | static char *option_origin = NULL; |
7a4ee28f | 44 | static char *option_branch = NULL; |
b57fb80a | 45 | static const char *real_git_dir; |
8434c2f1 | 46 | static char *option_upload_pack = "git-upload-pack"; |
5bd631b3 | 47 | static int option_verbosity; |
01fdc21f | 48 | static int option_progress = -1; |
84054f79 | 49 | static struct string_list option_config; |
dbc92b07 JH |
50 | static struct string_list option_reference; |
51 | ||
52 | static 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 | |
61 | static 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"), | |
3e6e0edd 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"), | |
8434c2f1 DB |
101 | OPT_END() |
102 | }; | |
103 | ||
e7fed18a JH |
104 | static const char *argv_submodule[] = { |
105 | "submodule", "update", "--init", "--recursive", NULL | |
106 | }; | |
107 | ||
8434c2f1 DB |
108 | static char *get_repo_path(const char *repo, int *is_bundle) |
109 | { | |
b3256eb8 | 110 | static char *suffix[] = { "/.git", "", ".git/.git", ".git" }; |
8434c2f1 DB |
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]); | |
9b0ebc72 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 | } | |
8434c2f1 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)); |
8434c2f1 DB |
147 | } |
148 | } | |
149 | ||
150 | return NULL; | |
151 | } | |
152 | ||
6612f877 | 153 | static 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; | |
8434c2f1 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; |
8434c2f1 DB |
220 | } |
221 | ||
44a68fd5 CB |
222 | static 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 | 231 | static 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 |
253 | static void setup_reference(void) |
254 | { | |
255 | for_each_string_list(&option_reference, add_one_reference, NULL); | |
8434c2f1 DB |
256 | } |
257 | ||
e6baf4a1 JH |
258 | static 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 | ||
292 | static 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 DB |
344 | continue; |
345 | if (option_local) | |
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 | 355 | static 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 | ||
376 | static const char *junk_work_tree; | |
377 | static const char *junk_git_dir; | |
e161acd1 | 378 | static pid_t junk_pid; |
8434c2f1 DB |
379 | |
380 | static 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 | ||
397 | static 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 |
404 | static 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 |
424 | static 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); | |
0ec4b165 NTND |
436 | else { |
437 | local_refs = NULL; | |
438 | tail = &local_refs; | |
439 | remote_head = copy_ref(find_remote_branch(refs, option_branch)); | |
440 | } | |
3e6e0edd NTND |
441 | |
442 | if (!remote_head && option_branch) | |
443 | warning(_("Could not find remote branch %s to clone."), | |
444 | option_branch); | |
5a7d5b68 | 445 | else { |
3e6e0edd | 446 | get_fetch_map(remote_head, refspec, &tail, 0); |
5a7d5b68 NTND |
447 | |
448 | /* if --branch=tag, pull the requested tag explicitly */ | |
449 | get_fetch_map(remote_head, tag_refspec, &tail, 0); | |
450 | } | |
3e6e0edd NTND |
451 | } else |
452 | get_fetch_map(refs, refspec, &tail, 0); | |
453 | ||
454 | if (!option_mirror && !option_single_branch) | |
468386a9 | 455 | get_fetch_map(refs, tag_refspec, &tail, 0); |
8434c2f1 | 456 | |
5bdc32d3 NP |
457 | return local_refs; |
458 | } | |
459 | ||
460 | static void write_remote_refs(const struct ref *local_refs) | |
461 | { | |
462 | const struct ref *r; | |
463 | ||
c1921c18 JK |
464 | for (r = local_refs; r; r = r->next) { |
465 | if (!r->peer_ref) | |
466 | continue; | |
39ef7fae | 467 | add_packed_ref(r->peer_ref->name, r->old_sha1); |
c1921c18 | 468 | } |
3e8aded2 JH |
469 | |
470 | pack_refs(PACK_REFS_ALL); | |
8434c2f1 DB |
471 | } |
472 | ||
3e6e0edd NTND |
473 | static void write_followtags(const struct ref *refs, const char *msg) |
474 | { | |
475 | const struct ref *ref; | |
476 | for (ref = refs; ref; ref = ref->next) { | |
477 | if (prefixcmp(ref->name, "refs/tags/")) | |
478 | continue; | |
479 | if (!suffixcmp(ref->name, "^{}")) | |
480 | continue; | |
481 | if (!has_sha1_file(ref->old_sha1)) | |
482 | continue; | |
483 | update_ref(msg, ref->name, ref->old_sha1, | |
484 | NULL, 0, DIE_ON_ERR); | |
485 | } | |
486 | } | |
487 | ||
960b7d1c NTND |
488 | static void update_remote_refs(const struct ref *refs, |
489 | const struct ref *mapped_refs, | |
490 | const struct ref *remote_head_points_at, | |
491 | const char *branch_top, | |
492 | const char *msg) | |
493 | { | |
494 | if (refs) { | |
960b7d1c NTND |
495 | write_remote_refs(mapped_refs); |
496 | if (option_single_branch) | |
497 | write_followtags(refs, msg); | |
498 | } | |
499 | ||
500 | if (remote_head_points_at && !option_bare) { | |
501 | struct strbuf head_ref = STRBUF_INIT; | |
502 | strbuf_addstr(&head_ref, branch_top); | |
503 | strbuf_addstr(&head_ref, "HEAD"); | |
504 | create_symref(head_ref.buf, | |
505 | remote_head_points_at->peer_ref->name, | |
506 | msg); | |
507 | } | |
508 | } | |
509 | ||
f034d354 NTND |
510 | static void update_head(const struct ref *our, const struct ref *remote, |
511 | const char *msg) | |
512 | { | |
9e585046 | 513 | if (our && !prefixcmp(our->name, "refs/heads/")) { |
f034d354 NTND |
514 | /* Local default branch link */ |
515 | create_symref("HEAD", our->name, NULL); | |
516 | if (!option_bare) { | |
517 | const char *head = skip_prefix(our->name, "refs/heads/"); | |
518 | update_ref(msg, "HEAD", our->old_sha1, NULL, 0, DIE_ON_ERR); | |
519 | install_branch_config(0, head, option_origin, our->name); | |
520 | } | |
5a7d5b68 NTND |
521 | } else if (our) { |
522 | struct commit *c = lookup_commit_reference(our->old_sha1); | |
523 | /* --branch specifies a non-branch (i.e. tags), detach HEAD */ | |
524 | update_ref(msg, "HEAD", c->object.sha1, | |
525 | NULL, REF_NODEREF, DIE_ON_ERR); | |
f034d354 NTND |
526 | } else if (remote) { |
527 | /* | |
528 | * We know remote HEAD points to a non-branch, or | |
920b691f | 529 | * HEAD points to a branch but we don't know which one. |
f034d354 NTND |
530 | * Detach HEAD in all these cases. |
531 | */ | |
532 | update_ref(msg, "HEAD", remote->old_sha1, | |
533 | NULL, REF_NODEREF, DIE_ON_ERR); | |
534 | } | |
535 | } | |
536 | ||
c39852c1 NTND |
537 | static int checkout(void) |
538 | { | |
539 | unsigned char sha1[20]; | |
540 | char *head; | |
541 | struct lock_file *lock_file; | |
542 | struct unpack_trees_options opts; | |
543 | struct tree *tree; | |
544 | struct tree_desc t; | |
545 | int err = 0, fd; | |
546 | ||
547 | if (option_no_checkout) | |
548 | return 0; | |
549 | ||
550 | head = resolve_refdup("HEAD", sha1, 1, NULL); | |
551 | if (!head) { | |
552 | warning(_("remote HEAD refers to nonexistent ref, " | |
553 | "unable to checkout.\n")); | |
554 | return 0; | |
555 | } | |
2857093b NTND |
556 | if (!strcmp(head, "HEAD")) { |
557 | if (advice_detached_head) | |
558 | detach_advice(sha1_to_hex(sha1)); | |
559 | } else { | |
c39852c1 NTND |
560 | if (prefixcmp(head, "refs/heads/")) |
561 | die(_("HEAD not found below refs/heads!")); | |
562 | } | |
563 | free(head); | |
564 | ||
565 | /* We need to be in the new work tree for the checkout */ | |
566 | setup_work_tree(); | |
567 | ||
568 | lock_file = xcalloc(1, sizeof(struct lock_file)); | |
569 | fd = hold_locked_index(lock_file, 1); | |
570 | ||
571 | memset(&opts, 0, sizeof opts); | |
572 | opts.update = 1; | |
573 | opts.merge = 1; | |
574 | opts.fn = oneway_merge; | |
8f63da13 | 575 | opts.verbose_update = (option_verbosity >= 0); |
c39852c1 NTND |
576 | opts.src_index = &the_index; |
577 | opts.dst_index = &the_index; | |
578 | ||
579 | tree = parse_tree_indirect(sha1); | |
580 | parse_tree(tree); | |
581 | init_tree_desc(&t, tree->buffer, tree->size); | |
582 | unpack_trees(1, &t, &opts); | |
583 | ||
584 | if (write_cache(fd, active_cache, active_nr) || | |
585 | commit_locked_index(lock_file)) | |
586 | die(_("unable to write new index file")); | |
587 | ||
588 | err |= run_hook(NULL, "post-checkout", sha1_to_hex(null_sha1), | |
589 | sha1_to_hex(sha1), "1", NULL); | |
590 | ||
591 | if (!err && option_recursive) | |
592 | err = run_command_v_opt(argv_submodule, RUN_GIT_CMD); | |
593 | ||
594 | return err; | |
595 | } | |
596 | ||
84054f79 JK |
597 | static int write_one_config(const char *key, const char *value, void *data) |
598 | { | |
599 | return git_config_set_multivar(key, value ? value : "true", "^$", 0); | |
600 | } | |
601 | ||
602 | static void write_config(struct string_list *config) | |
603 | { | |
604 | int i; | |
605 | ||
606 | for (i = 0; i < config->nr; i++) { | |
607 | if (git_config_parse_parameter(config->items[i].string, | |
608 | write_one_config, NULL) < 0) | |
609 | die("unable to write parameters to config file"); | |
610 | } | |
611 | } | |
612 | ||
31b808a0 RT |
613 | static void write_refspec_config(const char* src_ref_prefix, |
614 | const struct ref* our_head_points_at, | |
615 | const struct ref* remote_head_points_at, struct strbuf* branch_top) | |
616 | { | |
617 | struct strbuf key = STRBUF_INIT; | |
618 | struct strbuf value = STRBUF_INIT; | |
619 | ||
620 | if (option_mirror || !option_bare) { | |
621 | if (option_single_branch && !option_mirror) { | |
622 | if (option_branch) { | |
623 | if (strstr(our_head_points_at->name, "refs/tags/")) | |
624 | strbuf_addf(&value, "+%s:%s", our_head_points_at->name, | |
625 | our_head_points_at->name); | |
626 | else | |
627 | strbuf_addf(&value, "+%s:%s%s", our_head_points_at->name, | |
628 | branch_top->buf, option_branch); | |
629 | } else if (remote_head_points_at) { | |
630 | strbuf_addf(&value, "+%s:%s%s", remote_head_points_at->name, | |
631 | branch_top->buf, | |
632 | skip_prefix(remote_head_points_at->name, "refs/heads/")); | |
633 | } | |
634 | /* | |
635 | * otherwise, the next "git fetch" will | |
636 | * simply fetch from HEAD without updating | |
637 | * any remote tracking branch, which is what | |
638 | * we want. | |
639 | */ | |
640 | } else { | |
641 | strbuf_addf(&value, "+%s*:%s*", src_ref_prefix, branch_top->buf); | |
642 | } | |
643 | /* Configure the remote */ | |
644 | if (value.len) { | |
645 | strbuf_addf(&key, "remote.%s.fetch", option_origin); | |
646 | git_config_set_multivar(key.buf, value.buf, "^$", 0); | |
647 | strbuf_reset(&key); | |
648 | ||
649 | if (option_mirror) { | |
650 | strbuf_addf(&key, "remote.%s.mirror", option_origin); | |
651 | git_config_set(key.buf, "true"); | |
652 | strbuf_reset(&key); | |
653 | } | |
654 | } | |
655 | } | |
656 | ||
657 | strbuf_release(&key); | |
658 | strbuf_release(&value); | |
659 | } | |
660 | ||
8434c2f1 DB |
661 | int cmd_clone(int argc, const char **argv, const char *prefix) |
662 | { | |
24c61c44 | 663 | int is_bundle = 0, is_local; |
8434c2f1 DB |
664 | struct stat buf; |
665 | const char *repo_name, *repo, *work_tree, *git_dir; | |
666 | char *path, *dir; | |
55892d23 | 667 | int dest_exists; |
37148311 | 668 | const struct ref *refs, *remote_head; |
7a4ee28f JK |
669 | const struct ref *remote_head_points_at; |
670 | const struct ref *our_head_points_at; | |
37148311 | 671 | struct ref *mapped_refs; |
90498161 | 672 | const struct ref *ref; |
b5ff37ac MV |
673 | struct strbuf key = STRBUF_INIT, value = STRBUF_INIT; |
674 | struct strbuf branch_top = STRBUF_INIT, reflog_msg = STRBUF_INIT; | |
1db4a75c | 675 | struct transport *transport = NULL; |
9e585046 | 676 | const char *src_ref_prefix = "refs/heads/"; |
6f48d39f | 677 | struct remote *remote; |
90498161 | 678 | int err = 0, complete_refs_before_fetch = 1; |
8434c2f1 | 679 | |
689f0396 DB |
680 | struct refspec *refspec; |
681 | const char *fetch_pattern; | |
8434c2f1 DB |
682 | |
683 | junk_pid = getpid(); | |
684 | ||
bbc30f99 | 685 | packet_trace_identity("clone"); |
37782920 | 686 | argc = parse_options(argc, argv, prefix, builtin_clone_options, |
8434c2f1 DB |
687 | builtin_clone_usage, 0); |
688 | ||
d52dc4b1 | 689 | if (argc > 2) |
e84d7b74 | 690 | usage_msg_opt(_("Too many arguments."), |
d52dc4b1 JN |
691 | builtin_clone_usage, builtin_clone_options); |
692 | ||
8434c2f1 | 693 | if (argc == 0) |
e84d7b74 | 694 | usage_msg_opt(_("You must specify a repository to clone."), |
d52dc4b1 | 695 | builtin_clone_usage, builtin_clone_options); |
8434c2f1 | 696 | |
3e6e0edd NTND |
697 | if (option_single_branch == -1) |
698 | option_single_branch = option_depth ? 1 : 0; | |
699 | ||
bc699afc JS |
700 | if (option_mirror) |
701 | option_bare = 1; | |
702 | ||
8434c2f1 DB |
703 | if (option_bare) { |
704 | if (option_origin) | |
e84d7b74 | 705 | die(_("--bare and --origin %s options are incompatible."), |
8434c2f1 DB |
706 | option_origin); |
707 | option_no_checkout = 1; | |
8434c2f1 DB |
708 | } |
709 | ||
710 | if (!option_origin) | |
711 | option_origin = "origin"; | |
712 | ||
713 | repo_name = argv[0]; | |
714 | ||
715 | path = get_repo_path(repo_name, &is_bundle); | |
716 | if (path) | |
e2a57aac | 717 | repo = xstrdup(absolute_path(repo_name)); |
8434c2f1 | 718 | else if (!strchr(repo_name, ':')) |
d3e1ddfd | 719 | die(_("repository '%s' does not exist"), repo_name); |
8434c2f1 DB |
720 | else |
721 | repo = repo_name; | |
24c61c44 NTND |
722 | is_local = path && !is_bundle; |
723 | if (is_local && option_depth) | |
e84d7b74 | 724 | warning(_("--depth is ignored in local clones; use file:// instead.")); |
8434c2f1 DB |
725 | |
726 | if (argc == 2) | |
727 | dir = xstrdup(argv[1]); | |
728 | else | |
6612f877 | 729 | dir = guess_dir_name(repo_name, is_bundle, option_bare); |
44a68fd5 | 730 | strip_trailing_slashes(dir); |
8434c2f1 | 731 | |
55892d23 AP |
732 | dest_exists = !stat(dir, &buf); |
733 | if (dest_exists && !is_empty_dir(dir)) | |
e84d7b74 ÆAB |
734 | die(_("destination path '%s' already exists and is not " |
735 | "an empty directory."), dir); | |
8434c2f1 | 736 | |
8434c2f1 DB |
737 | strbuf_addf(&reflog_msg, "clone: from %s", repo); |
738 | ||
739 | if (option_bare) | |
740 | work_tree = NULL; | |
741 | else { | |
742 | work_tree = getenv("GIT_WORK_TREE"); | |
743 | if (work_tree && !stat(work_tree, &buf)) | |
e84d7b74 | 744 | die(_("working tree '%s' already exists."), work_tree); |
8434c2f1 DB |
745 | } |
746 | ||
747 | if (option_bare || work_tree) | |
748 | git_dir = xstrdup(dir); | |
749 | else { | |
750 | work_tree = dir; | |
751 | git_dir = xstrdup(mkpath("%s/.git", dir)); | |
752 | } | |
753 | ||
754 | if (!option_bare) { | |
755 | junk_work_tree = work_tree; | |
8e21d63b | 756 | if (safe_create_leading_directories_const(work_tree) < 0) |
e84d7b74 | 757 | die_errno(_("could not create leading directories of '%s'"), |
d824cbba | 758 | work_tree); |
45d4fdc2 | 759 | if (!dest_exists && mkdir(work_tree, 0777)) |
e84d7b74 | 760 | die_errno(_("could not create work tree dir '%s'."), |
d824cbba | 761 | work_tree); |
8434c2f1 DB |
762 | set_git_work_tree(work_tree); |
763 | } | |
764 | junk_git_dir = git_dir; | |
765 | atexit(remove_junk); | |
57b235a4 | 766 | sigchain_push_common(remove_junk_on_signal); |
8434c2f1 | 767 | |
50b5f420 | 768 | setenv(CONFIG_ENVIRONMENT, mkpath("%s/config", git_dir), 1); |
8434c2f1 | 769 | |
8e21d63b | 770 | if (safe_create_leading_directories_const(git_dir) < 0) |
e84d7b74 | 771 | die(_("could not create leading directories of '%s'"), git_dir); |
b57fb80a NTND |
772 | |
773 | set_git_dir_init(git_dir, real_git_dir, 0); | |
774 | if (real_git_dir) | |
775 | git_dir = real_git_dir; | |
8434c2f1 | 776 | |
3781fcce ÆAB |
777 | if (0 <= option_verbosity) { |
778 | if (option_bare) | |
8debf696 | 779 | printf(_("Cloning into bare repository '%s'...\n"), dir); |
3781fcce | 780 | else |
8debf696 | 781 | printf(_("Cloning into '%s'...\n"), dir); |
3781fcce | 782 | } |
28ba96ab | 783 | init_db(option_template, INIT_DB_QUIET); |
84054f79 | 784 | write_config(&option_config); |
8434c2f1 | 785 | |
5b8063b5 JS |
786 | /* |
787 | * At this point, the config exists, so we do not need the | |
788 | * environment variable. We actually need to unset it, too, to | |
789 | * re-enable parsing of the global configs. | |
790 | */ | |
791 | unsetenv(CONFIG_ENVIRONMENT); | |
792 | ||
9bd81e42 | 793 | git_config(git_default_config, NULL); |
8434c2f1 DB |
794 | |
795 | if (option_bare) { | |
bc699afc JS |
796 | if (option_mirror) |
797 | src_ref_prefix = "refs/"; | |
b5ff37ac | 798 | strbuf_addstr(&branch_top, src_ref_prefix); |
8434c2f1 DB |
799 | |
800 | git_config_set("core.bare", "true"); | |
801 | } else { | |
b5ff37ac | 802 | strbuf_addf(&branch_top, "refs/remotes/%s/", option_origin); |
bc699afc | 803 | } |
8434c2f1 | 804 | |
689f0396 | 805 | strbuf_addf(&value, "+%s*:%s*", src_ref_prefix, branch_top.buf); |
df61c889 SR |
806 | strbuf_addf(&key, "remote.%s.url", option_origin); |
807 | git_config_set(key.buf, repo); | |
808 | strbuf_reset(&key); | |
809 | ||
dbc92b07 JH |
810 | if (option_reference.nr) |
811 | setup_reference(); | |
766ac6a6 | 812 | |
689f0396 DB |
813 | fetch_pattern = value.buf; |
814 | refspec = parse_fetch_refspec(1, &fetch_pattern); | |
815 | ||
816 | strbuf_reset(&value); | |
8434c2f1 | 817 | |
6f48d39f NTND |
818 | remote = remote_get(option_origin); |
819 | transport = transport_get(remote, remote->url[0]); | |
8434c2f1 | 820 | |
6f48d39f | 821 | if (!is_local) { |
37b78c25 | 822 | if (!transport->get_refs_list || !transport->fetch) |
e84d7b74 | 823 | die(_("Don't know how to clone %s"), transport->url); |
37b78c25 | 824 | |
8434c2f1 DB |
825 | transport_set_option(transport, TRANS_OPT_KEEP, "yes"); |
826 | ||
827 | if (option_depth) | |
828 | transport_set_option(transport, TRANS_OPT_DEPTH, | |
829 | option_depth); | |
3e6e0edd NTND |
830 | if (option_single_branch) |
831 | transport_set_option(transport, TRANS_OPT_FOLLOWTAGS, "1"); | |
8434c2f1 | 832 | |
d01b3c02 | 833 | transport_set_verbosity(transport, option_verbosity, option_progress); |
8434c2f1 | 834 | |
837c8767 SH |
835 | if (option_upload_pack) |
836 | transport_set_option(transport, TRANS_OPT_UPLOADPACK, | |
837 | option_upload_pack); | |
8434c2f1 DB |
838 | } |
839 | ||
6f48d39f | 840 | refs = transport_get_remote_refs(transport); |
8434c2f1 | 841 | |
5b05795c MH |
842 | if (refs) { |
843 | mapped_refs = wanted_peer_refs(refs, refspec); | |
844 | /* | |
845 | * transport_get_remote_refs() may return refs with null sha-1 | |
846 | * in mapped_refs (see struct transport->get_refs_list | |
847 | * comment). In that case we need fetch it early because | |
848 | * remote_head code below relies on it. | |
849 | * | |
850 | * for normal clones, transport_get_remote_refs() should | |
851 | * return reliable ref set, we can delay cloning until after | |
852 | * remote HEAD check. | |
853 | */ | |
854 | for (ref = refs; ref; ref = ref->next) | |
855 | if (is_null_sha1(ref->old_sha1)) { | |
856 | complete_refs_before_fetch = 0; | |
857 | break; | |
858 | } | |
90498161 | 859 | |
5b05795c MH |
860 | if (!is_local && !complete_refs_before_fetch) |
861 | transport_fetch_refs(transport, mapped_refs); | |
8434c2f1 | 862 | |
6cb4e6cc | 863 | remote_head = find_ref_by_name(refs, "HEAD"); |
7a4ee28f JK |
864 | remote_head_points_at = |
865 | guess_remote_head(remote_head, mapped_refs, 0); | |
866 | ||
867 | if (option_branch) { | |
7a4ee28f | 868 | our_head_points_at = |
9e585046 | 869 | find_remote_branch(mapped_refs, option_branch); |
7a4ee28f | 870 | |
920b691f NTND |
871 | if (!our_head_points_at) |
872 | die(_("Remote branch %s not found in upstream %s"), | |
873 | option_branch, option_origin); | |
7a4ee28f JK |
874 | } |
875 | else | |
876 | our_head_points_at = remote_head_points_at; | |
86ac7518 SR |
877 | } |
878 | else { | |
e84d7b74 | 879 | warning(_("You appear to have cloned an empty repository.")); |
5b05795c | 880 | mapped_refs = NULL; |
7a4ee28f JK |
881 | our_head_points_at = NULL; |
882 | remote_head_points_at = NULL; | |
86ac7518 SR |
883 | remote_head = NULL; |
884 | option_no_checkout = 1; | |
5cd12b85 | 885 | if (!option_bare) |
a9f2c136 | 886 | install_branch_config(0, "master", option_origin, |
5cd12b85 | 887 | "refs/heads/master"); |
86ac7518 | 888 | } |
8434c2f1 | 889 | |
31b808a0 RT |
890 | write_refspec_config(src_ref_prefix, our_head_points_at, |
891 | remote_head_points_at, &branch_top); | |
892 | ||
6f48d39f NTND |
893 | if (is_local) |
894 | clone_local(path, git_dir); | |
90498161 | 895 | else if (refs && complete_refs_before_fetch) |
6f48d39f | 896 | transport_fetch_refs(transport, mapped_refs); |
8434c2f1 | 897 | |
960b7d1c NTND |
898 | update_remote_refs(refs, mapped_refs, remote_head_points_at, |
899 | branch_top.buf, reflog_msg.buf); | |
8434c2f1 | 900 | |
f034d354 | 901 | update_head(our_head_points_at, remote_head, reflog_msg.buf); |
1db4a75c | 902 | |
6f48d39f NTND |
903 | transport_unlock_pack(transport); |
904 | transport_disconnect(transport); | |
1db4a75c | 905 | |
c39852c1 | 906 | err = checkout(); |
8434c2f1 DB |
907 | |
908 | strbuf_release(&reflog_msg); | |
b5ff37ac MV |
909 | strbuf_release(&branch_top); |
910 | strbuf_release(&key); | |
911 | strbuf_release(&value); | |
8434c2f1 | 912 | junk_pid = 0; |
dfa7a6c5 | 913 | return err; |
8434c2f1 | 914 | } |