Merge branch 'jc/magic-pathspec'
[git/git.git] / builtin / fetch.c
1 /*
2 * "git fetch"
3 */
4 #include "cache.h"
5 #include "refs.h"
6 #include "commit.h"
7 #include "builtin.h"
8 #include "string-list.h"
9 #include "remote.h"
10 #include "transport.h"
11 #include "run-command.h"
12 #include "parse-options.h"
13 #include "sigchain.h"
14 #include "transport.h"
15 #include "submodule.h"
16
17 static const char * const builtin_fetch_usage[] = {
18 "git fetch [<options>] [<repository> [<refspec>...]]",
19 "git fetch [<options>] <group>",
20 "git fetch --multiple [<options>] [(<repository> | <group>)...]",
21 "git fetch --all [<options>]",
22 NULL
23 };
24
25 enum {
26 TAGS_UNSET = 0,
27 TAGS_DEFAULT = 1,
28 TAGS_SET = 2
29 };
30
31 static int all, append, dry_run, force, keep, multiple, prune, update_head_ok, verbosity;
32 static int progress, recurse_submodules = RECURSE_SUBMODULES_DEFAULT;
33 static int tags = TAGS_DEFAULT;
34 static const char *depth;
35 static const char *upload_pack;
36 static struct strbuf default_rla = STRBUF_INIT;
37 static struct transport *transport;
38 static const char *submodule_prefix = "";
39 static const char *recurse_submodules_default;
40
41 static int option_parse_recurse_submodules(const struct option *opt,
42 const char *arg, int unset)
43 {
44 if (unset) {
45 recurse_submodules = RECURSE_SUBMODULES_OFF;
46 } else {
47 if (arg)
48 recurse_submodules = parse_fetch_recurse_submodules_arg(opt->long_name, arg);
49 else
50 recurse_submodules = RECURSE_SUBMODULES_ON;
51 }
52 return 0;
53 }
54
55 static struct option builtin_fetch_options[] = {
56 OPT__VERBOSITY(&verbosity),
57 OPT_BOOLEAN(0, "all", &all,
58 "fetch from all remotes"),
59 OPT_BOOLEAN('a', "append", &append,
60 "append to .git/FETCH_HEAD instead of overwriting"),
61 OPT_STRING(0, "upload-pack", &upload_pack, "path",
62 "path to upload pack on remote end"),
63 OPT__FORCE(&force, "force overwrite of local branch"),
64 OPT_BOOLEAN('m', "multiple", &multiple,
65 "fetch from multiple remotes"),
66 OPT_SET_INT('t', "tags", &tags,
67 "fetch all tags and associated objects", TAGS_SET),
68 OPT_SET_INT('n', NULL, &tags,
69 "do not fetch all tags (--no-tags)", TAGS_UNSET),
70 OPT_BOOLEAN('p', "prune", &prune,
71 "prune remote-tracking branches no longer on remote"),
72 { OPTION_CALLBACK, 0, "recurse-submodules", NULL, "on-demand",
73 "control recursive fetching of submodules",
74 PARSE_OPT_OPTARG, option_parse_recurse_submodules },
75 OPT_BOOLEAN(0, "dry-run", &dry_run,
76 "dry run"),
77 OPT_BOOLEAN('k', "keep", &keep, "keep downloaded pack"),
78 OPT_BOOLEAN('u', "update-head-ok", &update_head_ok,
79 "allow updating of HEAD ref"),
80 OPT_BOOLEAN(0, "progress", &progress, "force progress reporting"),
81 OPT_STRING(0, "depth", &depth, "depth",
82 "deepen history of shallow clone"),
83 { OPTION_STRING, 0, "submodule-prefix", &submodule_prefix, "dir",
84 "prepend this to submodule path output", PARSE_OPT_HIDDEN },
85 { OPTION_STRING, 0, "recurse-submodules-default",
86 &recurse_submodules_default, NULL,
87 "default mode for recursion", PARSE_OPT_HIDDEN },
88 OPT_END()
89 };
90
91 static void unlock_pack(void)
92 {
93 if (transport)
94 transport_unlock_pack(transport);
95 }
96
97 static void unlock_pack_on_signal(int signo)
98 {
99 unlock_pack();
100 sigchain_pop(signo);
101 raise(signo);
102 }
103
104 static void add_merge_config(struct ref **head,
105 const struct ref *remote_refs,
106 struct branch *branch,
107 struct ref ***tail)
108 {
109 int i;
110
111 for (i = 0; i < branch->merge_nr; i++) {
112 struct ref *rm, **old_tail = *tail;
113 struct refspec refspec;
114
115 for (rm = *head; rm; rm = rm->next) {
116 if (branch_merge_matches(branch, i, rm->name)) {
117 rm->merge = 1;
118 break;
119 }
120 }
121 if (rm)
122 continue;
123
124 /*
125 * Not fetched to a remote-tracking branch? We need to fetch
126 * it anyway to allow this branch's "branch.$name.merge"
127 * to be honored by 'git pull', but we do not have to
128 * fail if branch.$name.merge is misconfigured to point
129 * at a nonexisting branch. If we were indeed called by
130 * 'git pull', it will notice the misconfiguration because
131 * there is no entry in the resulting FETCH_HEAD marked
132 * for merging.
133 */
134 memset(&refspec, 0, sizeof(refspec));
135 refspec.src = branch->merge[i]->src;
136 get_fetch_map(remote_refs, &refspec, tail, 1);
137 for (rm = *old_tail; rm; rm = rm->next)
138 rm->merge = 1;
139 }
140 }
141
142 static void find_non_local_tags(struct transport *transport,
143 struct ref **head,
144 struct ref ***tail);
145
146 static struct ref *get_ref_map(struct transport *transport,
147 struct refspec *refs, int ref_count, int tags,
148 int *autotags)
149 {
150 int i;
151 struct ref *rm;
152 struct ref *ref_map = NULL;
153 struct ref **tail = &ref_map;
154
155 const struct ref *remote_refs = transport_get_remote_refs(transport);
156
157 if (ref_count || tags == TAGS_SET) {
158 for (i = 0; i < ref_count; i++) {
159 get_fetch_map(remote_refs, &refs[i], &tail, 0);
160 if (refs[i].dst && refs[i].dst[0])
161 *autotags = 1;
162 }
163 /* Merge everything on the command line, but not --tags */
164 for (rm = ref_map; rm; rm = rm->next)
165 rm->merge = 1;
166 if (tags == TAGS_SET)
167 get_fetch_map(remote_refs, tag_refspec, &tail, 0);
168 } else {
169 /* Use the defaults */
170 struct remote *remote = transport->remote;
171 struct branch *branch = branch_get(NULL);
172 int has_merge = branch_has_merge_config(branch);
173 if (remote &&
174 (remote->fetch_refspec_nr ||
175 /* Note: has_merge implies non-NULL branch->remote_name */
176 (has_merge && !strcmp(branch->remote_name, remote->name)))) {
177 for (i = 0; i < remote->fetch_refspec_nr; i++) {
178 get_fetch_map(remote_refs, &remote->fetch[i], &tail, 0);
179 if (remote->fetch[i].dst &&
180 remote->fetch[i].dst[0])
181 *autotags = 1;
182 if (!i && !has_merge && ref_map &&
183 !remote->fetch[0].pattern)
184 ref_map->merge = 1;
185 }
186 /*
187 * if the remote we're fetching from is the same
188 * as given in branch.<name>.remote, we add the
189 * ref given in branch.<name>.merge, too.
190 *
191 * Note: has_merge implies non-NULL branch->remote_name
192 */
193 if (has_merge &&
194 !strcmp(branch->remote_name, remote->name))
195 add_merge_config(&ref_map, remote_refs, branch, &tail);
196 } else {
197 ref_map = get_remote_ref(remote_refs, "HEAD");
198 if (!ref_map)
199 die(_("Couldn't find remote ref HEAD"));
200 ref_map->merge = 1;
201 tail = &ref_map->next;
202 }
203 }
204 if (tags == TAGS_DEFAULT && *autotags)
205 find_non_local_tags(transport, &ref_map, &tail);
206 ref_remove_duplicates(ref_map);
207
208 return ref_map;
209 }
210
211 #define STORE_REF_ERROR_OTHER 1
212 #define STORE_REF_ERROR_DF_CONFLICT 2
213
214 static int s_update_ref(const char *action,
215 struct ref *ref,
216 int check_old)
217 {
218 char msg[1024];
219 char *rla = getenv("GIT_REFLOG_ACTION");
220 static struct ref_lock *lock;
221
222 if (dry_run)
223 return 0;
224 if (!rla)
225 rla = default_rla.buf;
226 snprintf(msg, sizeof(msg), "%s: %s", rla, action);
227 lock = lock_any_ref_for_update(ref->name,
228 check_old ? ref->old_sha1 : NULL, 0);
229 if (!lock)
230 return errno == ENOTDIR ? STORE_REF_ERROR_DF_CONFLICT :
231 STORE_REF_ERROR_OTHER;
232 if (write_ref_sha1(lock, ref->new_sha1, msg) < 0)
233 return errno == ENOTDIR ? STORE_REF_ERROR_DF_CONFLICT :
234 STORE_REF_ERROR_OTHER;
235 return 0;
236 }
237
238 #define REFCOL_WIDTH 10
239
240 static int update_local_ref(struct ref *ref,
241 const char *remote,
242 char *display)
243 {
244 struct commit *current = NULL, *updated;
245 enum object_type type;
246 struct branch *current_branch = branch_get(NULL);
247 const char *pretty_ref = prettify_refname(ref->name);
248
249 *display = 0;
250 type = sha1_object_info(ref->new_sha1, NULL);
251 if (type < 0)
252 die(_("object %s not found"), sha1_to_hex(ref->new_sha1));
253
254 if (!hashcmp(ref->old_sha1, ref->new_sha1)) {
255 if (verbosity > 0)
256 sprintf(display, "= %-*s %-*s -> %s", TRANSPORT_SUMMARY_WIDTH,
257 _("[up to date]"), REFCOL_WIDTH, remote,
258 pretty_ref);
259 return 0;
260 }
261
262 if (current_branch &&
263 !strcmp(ref->name, current_branch->name) &&
264 !(update_head_ok || is_bare_repository()) &&
265 !is_null_sha1(ref->old_sha1)) {
266 /*
267 * If this is the head, and it's not okay to update
268 * the head, and the old value of the head isn't empty...
269 */
270 sprintf(display, _("! %-*s %-*s -> %s (can't fetch in current branch)"),
271 TRANSPORT_SUMMARY_WIDTH, _("[rejected]"), REFCOL_WIDTH, remote,
272 pretty_ref);
273 return 1;
274 }
275
276 if (!is_null_sha1(ref->old_sha1) &&
277 !prefixcmp(ref->name, "refs/tags/")) {
278 int r;
279 r = s_update_ref("updating tag", ref, 0);
280 sprintf(display, "%c %-*s %-*s -> %s%s", r ? '!' : '-',
281 TRANSPORT_SUMMARY_WIDTH, _("[tag update]"), REFCOL_WIDTH, remote,
282 pretty_ref, r ? _(" (unable to update local ref)") : "");
283 return r;
284 }
285
286 current = lookup_commit_reference_gently(ref->old_sha1, 1);
287 updated = lookup_commit_reference_gently(ref->new_sha1, 1);
288 if (!current || !updated) {
289 const char *msg;
290 const char *what;
291 int r;
292 if (!strncmp(ref->name, "refs/tags/", 10)) {
293 msg = "storing tag";
294 what = _("[new tag]");
295 }
296 else {
297 msg = "storing head";
298 what = _("[new branch]");
299 if ((recurse_submodules != RECURSE_SUBMODULES_OFF) &&
300 (recurse_submodules != RECURSE_SUBMODULES_ON))
301 check_for_new_submodule_commits(ref->new_sha1);
302 }
303
304 r = s_update_ref(msg, ref, 0);
305 sprintf(display, "%c %-*s %-*s -> %s%s", r ? '!' : '*',
306 TRANSPORT_SUMMARY_WIDTH, what, REFCOL_WIDTH, remote, pretty_ref,
307 r ? _(" (unable to update local ref)") : "");
308 return r;
309 }
310
311 if (in_merge_bases(current, &updated, 1)) {
312 char quickref[83];
313 int r;
314 strcpy(quickref, find_unique_abbrev(current->object.sha1, DEFAULT_ABBREV));
315 strcat(quickref, "..");
316 strcat(quickref, find_unique_abbrev(ref->new_sha1, DEFAULT_ABBREV));
317 if ((recurse_submodules != RECURSE_SUBMODULES_OFF) &&
318 (recurse_submodules != RECURSE_SUBMODULES_ON))
319 check_for_new_submodule_commits(ref->new_sha1);
320 r = s_update_ref("fast-forward", ref, 1);
321 sprintf(display, "%c %-*s %-*s -> %s%s", r ? '!' : ' ',
322 TRANSPORT_SUMMARY_WIDTH, quickref, REFCOL_WIDTH, remote,
323 pretty_ref, r ? _(" (unable to update local ref)") : "");
324 return r;
325 } else if (force || ref->force) {
326 char quickref[84];
327 int r;
328 strcpy(quickref, find_unique_abbrev(current->object.sha1, DEFAULT_ABBREV));
329 strcat(quickref, "...");
330 strcat(quickref, find_unique_abbrev(ref->new_sha1, DEFAULT_ABBREV));
331 if ((recurse_submodules != RECURSE_SUBMODULES_OFF) &&
332 (recurse_submodules != RECURSE_SUBMODULES_ON))
333 check_for_new_submodule_commits(ref->new_sha1);
334 r = s_update_ref("forced-update", ref, 1);
335 sprintf(display, "%c %-*s %-*s -> %s (%s)", r ? '!' : '+',
336 TRANSPORT_SUMMARY_WIDTH, quickref, REFCOL_WIDTH, remote,
337 pretty_ref,
338 r ? _("unable to update local ref") : _("forced update"));
339 return r;
340 } else {
341 sprintf(display, "! %-*s %-*s -> %s %s",
342 TRANSPORT_SUMMARY_WIDTH, _("[rejected]"), REFCOL_WIDTH, remote,
343 pretty_ref, _("(non-fast-forward)"));
344 return 1;
345 }
346 }
347
348 static int store_updated_refs(const char *raw_url, const char *remote_name,
349 struct ref *ref_map)
350 {
351 FILE *fp;
352 struct commit *commit;
353 int url_len, i, note_len, shown_url = 0, rc = 0;
354 char note[1024];
355 const char *what, *kind;
356 struct ref *rm;
357 char *url, *filename = dry_run ? "/dev/null" : git_path("FETCH_HEAD");
358
359 fp = fopen(filename, "a");
360 if (!fp)
361 return error(_("cannot open %s: %s\n"), filename, strerror(errno));
362
363 if (raw_url)
364 url = transport_anonymize_url(raw_url);
365 else
366 url = xstrdup("foreign");
367 for (rm = ref_map; rm; rm = rm->next) {
368 struct ref *ref = NULL;
369
370 if (rm->peer_ref) {
371 ref = xcalloc(1, sizeof(*ref) + strlen(rm->peer_ref->name) + 1);
372 strcpy(ref->name, rm->peer_ref->name);
373 hashcpy(ref->old_sha1, rm->peer_ref->old_sha1);
374 hashcpy(ref->new_sha1, rm->old_sha1);
375 ref->force = rm->peer_ref->force;
376 }
377
378 commit = lookup_commit_reference_gently(rm->old_sha1, 1);
379 if (!commit)
380 rm->merge = 0;
381
382 if (!strcmp(rm->name, "HEAD")) {
383 kind = "";
384 what = "";
385 }
386 else if (!prefixcmp(rm->name, "refs/heads/")) {
387 kind = "branch";
388 what = rm->name + 11;
389 }
390 else if (!prefixcmp(rm->name, "refs/tags/")) {
391 kind = "tag";
392 what = rm->name + 10;
393 }
394 else if (!prefixcmp(rm->name, "refs/remotes/")) {
395 kind = "remote-tracking branch";
396 what = rm->name + 13;
397 }
398 else {
399 kind = "";
400 what = rm->name;
401 }
402
403 url_len = strlen(url);
404 for (i = url_len - 1; url[i] == '/' && 0 <= i; i--)
405 ;
406 url_len = i + 1;
407 if (4 < i && !strncmp(".git", url + i - 3, 4))
408 url_len = i - 3;
409
410 note_len = 0;
411 if (*what) {
412 if (*kind)
413 note_len += sprintf(note + note_len, "%s ",
414 kind);
415 note_len += sprintf(note + note_len, "'%s' of ", what);
416 }
417 note[note_len] = '\0';
418 fprintf(fp, "%s\t%s\t%s",
419 sha1_to_hex(commit ? commit->object.sha1 :
420 rm->old_sha1),
421 rm->merge ? "" : "not-for-merge",
422 note);
423 for (i = 0; i < url_len; ++i)
424 if ('\n' == url[i])
425 fputs("\\n", fp);
426 else
427 fputc(url[i], fp);
428 fputc('\n', fp);
429
430 if (ref) {
431 rc |= update_local_ref(ref, what, note);
432 free(ref);
433 } else
434 sprintf(note, "* %-*s %-*s -> FETCH_HEAD",
435 TRANSPORT_SUMMARY_WIDTH, *kind ? kind : "branch",
436 REFCOL_WIDTH, *what ? what : "HEAD");
437 if (*note) {
438 if (verbosity >= 0 && !shown_url) {
439 fprintf(stderr, _("From %.*s\n"),
440 url_len, url);
441 shown_url = 1;
442 }
443 if (verbosity >= 0)
444 fprintf(stderr, " %s\n", note);
445 }
446 }
447 free(url);
448 fclose(fp);
449 if (rc & STORE_REF_ERROR_DF_CONFLICT)
450 error(_("some local refs could not be updated; try running\n"
451 " 'git remote prune %s' to remove any old, conflicting "
452 "branches"), remote_name);
453 return rc;
454 }
455
456 /*
457 * We would want to bypass the object transfer altogether if
458 * everything we are going to fetch already exists and is connected
459 * locally.
460 *
461 * The refs we are going to fetch are in ref_map. If running
462 *
463 * $ git rev-list --objects --stdin --not --all
464 *
465 * (feeding all the refs in ref_map on its standard input)
466 * does not error out, that means everything reachable from the
467 * refs we are going to fetch exists and is connected to some of
468 * our existing refs.
469 */
470 static int quickfetch(struct ref *ref_map)
471 {
472 struct child_process revlist;
473 struct ref *ref;
474 int err;
475 const char *argv[] = {"rev-list",
476 "--quiet", "--objects", "--stdin", "--not", "--all", NULL};
477
478 /*
479 * If we are deepening a shallow clone we already have these
480 * objects reachable. Running rev-list here will return with
481 * a good (0) exit status and we'll bypass the fetch that we
482 * really need to perform. Claiming failure now will ensure
483 * we perform the network exchange to deepen our history.
484 */
485 if (depth)
486 return -1;
487
488 if (!ref_map)
489 return 0;
490
491 memset(&revlist, 0, sizeof(revlist));
492 revlist.argv = argv;
493 revlist.git_cmd = 1;
494 revlist.no_stdout = 1;
495 revlist.no_stderr = 1;
496 revlist.in = -1;
497
498 err = start_command(&revlist);
499 if (err) {
500 error(_("could not run rev-list"));
501 return err;
502 }
503
504 /*
505 * If rev-list --stdin encounters an unknown commit, it terminates,
506 * which will cause SIGPIPE in the write loop below.
507 */
508 sigchain_push(SIGPIPE, SIG_IGN);
509
510 for (ref = ref_map; ref; ref = ref->next) {
511 if (write_in_full(revlist.in, sha1_to_hex(ref->old_sha1), 40) < 0 ||
512 write_str_in_full(revlist.in, "\n") < 0) {
513 if (errno != EPIPE && errno != EINVAL)
514 error(_("failed write to rev-list: %s"), strerror(errno));
515 err = -1;
516 break;
517 }
518 }
519
520 if (close(revlist.in)) {
521 error(_("failed to close rev-list's stdin: %s"), strerror(errno));
522 err = -1;
523 }
524
525 sigchain_pop(SIGPIPE);
526
527 return finish_command(&revlist) || err;
528 }
529
530 static int fetch_refs(struct transport *transport, struct ref *ref_map)
531 {
532 int ret = quickfetch(ref_map);
533 if (ret)
534 ret = transport_fetch_refs(transport, ref_map);
535 if (!ret)
536 ret |= store_updated_refs(transport->url,
537 transport->remote->name,
538 ref_map);
539 transport_unlock_pack(transport);
540 return ret;
541 }
542
543 static int prune_refs(struct transport *transport, struct ref *ref_map)
544 {
545 int result = 0;
546 struct ref *ref, *stale_refs = get_stale_heads(transport->remote, ref_map);
547 const char *dangling_msg = dry_run
548 ? _(" (%s will become dangling)\n")
549 : _(" (%s has become dangling)\n");
550
551 for (ref = stale_refs; ref; ref = ref->next) {
552 if (!dry_run)
553 result |= delete_ref(ref->name, NULL, 0);
554 if (verbosity >= 0) {
555 fprintf(stderr, " x %-*s %-*s -> %s\n",
556 TRANSPORT_SUMMARY_WIDTH, _("[deleted]"),
557 REFCOL_WIDTH, _("(none)"), prettify_refname(ref->name));
558 warn_dangling_symref(stderr, dangling_msg, ref->name);
559 }
560 }
561 free_refs(stale_refs);
562 return result;
563 }
564
565 static int add_existing(const char *refname, const unsigned char *sha1,
566 int flag, void *cbdata)
567 {
568 struct string_list *list = (struct string_list *)cbdata;
569 struct string_list_item *item = string_list_insert(list, refname);
570 item->util = (void *)sha1;
571 return 0;
572 }
573
574 static int will_fetch(struct ref **head, const unsigned char *sha1)
575 {
576 struct ref *rm = *head;
577 while (rm) {
578 if (!hashcmp(rm->old_sha1, sha1))
579 return 1;
580 rm = rm->next;
581 }
582 return 0;
583 }
584
585 static void find_non_local_tags(struct transport *transport,
586 struct ref **head,
587 struct ref ***tail)
588 {
589 struct string_list existing_refs = STRING_LIST_INIT_NODUP;
590 struct string_list remote_refs = STRING_LIST_INIT_NODUP;
591 const struct ref *ref;
592 struct string_list_item *item = NULL;
593
594 for_each_ref(add_existing, &existing_refs);
595 for (ref = transport_get_remote_refs(transport); ref; ref = ref->next) {
596 if (prefixcmp(ref->name, "refs/tags"))
597 continue;
598
599 /*
600 * The peeled ref always follows the matching base
601 * ref, so if we see a peeled ref that we don't want
602 * to fetch then we can mark the ref entry in the list
603 * as one to ignore by setting util to NULL.
604 */
605 if (!suffixcmp(ref->name, "^{}")) {
606 if (item && !has_sha1_file(ref->old_sha1) &&
607 !will_fetch(head, ref->old_sha1) &&
608 !has_sha1_file(item->util) &&
609 !will_fetch(head, item->util))
610 item->util = NULL;
611 item = NULL;
612 continue;
613 }
614
615 /*
616 * If item is non-NULL here, then we previously saw a
617 * ref not followed by a peeled reference, so we need
618 * to check if it is a lightweight tag that we want to
619 * fetch.
620 */
621 if (item && !has_sha1_file(item->util) &&
622 !will_fetch(head, item->util))
623 item->util = NULL;
624
625 item = NULL;
626
627 /* skip duplicates and refs that we already have */
628 if (string_list_has_string(&remote_refs, ref->name) ||
629 string_list_has_string(&existing_refs, ref->name))
630 continue;
631
632 item = string_list_insert(&remote_refs, ref->name);
633 item->util = (void *)ref->old_sha1;
634 }
635 string_list_clear(&existing_refs, 0);
636
637 /*
638 * We may have a final lightweight tag that needs to be
639 * checked to see if it needs fetching.
640 */
641 if (item && !has_sha1_file(item->util) &&
642 !will_fetch(head, item->util))
643 item->util = NULL;
644
645 /*
646 * For all the tags in the remote_refs string list,
647 * add them to the list of refs to be fetched
648 */
649 for_each_string_list_item(item, &remote_refs) {
650 /* Unless we have already decided to ignore this item... */
651 if (item->util)
652 {
653 struct ref *rm = alloc_ref(item->string);
654 rm->peer_ref = alloc_ref(item->string);
655 hashcpy(rm->old_sha1, item->util);
656 **tail = rm;
657 *tail = &rm->next;
658 }
659 }
660
661 string_list_clear(&remote_refs, 0);
662 }
663
664 static void check_not_current_branch(struct ref *ref_map)
665 {
666 struct branch *current_branch = branch_get(NULL);
667
668 if (is_bare_repository() || !current_branch)
669 return;
670
671 for (; ref_map; ref_map = ref_map->next)
672 if (ref_map->peer_ref && !strcmp(current_branch->refname,
673 ref_map->peer_ref->name))
674 die(_("Refusing to fetch into current branch %s "
675 "of non-bare repository"), current_branch->refname);
676 }
677
678 static int truncate_fetch_head(void)
679 {
680 char *filename = git_path("FETCH_HEAD");
681 FILE *fp = fopen(filename, "w");
682
683 if (!fp)
684 return error(_("cannot open %s: %s\n"), filename, strerror(errno));
685 fclose(fp);
686 return 0;
687 }
688
689 static int do_fetch(struct transport *transport,
690 struct refspec *refs, int ref_count)
691 {
692 struct string_list existing_refs = STRING_LIST_INIT_NODUP;
693 struct string_list_item *peer_item = NULL;
694 struct ref *ref_map;
695 struct ref *rm;
696 int autotags = (transport->remote->fetch_tags == 1);
697
698 for_each_ref(add_existing, &existing_refs);
699
700 if (tags == TAGS_DEFAULT) {
701 if (transport->remote->fetch_tags == 2)
702 tags = TAGS_SET;
703 if (transport->remote->fetch_tags == -1)
704 tags = TAGS_UNSET;
705 }
706
707 if (!transport->get_refs_list || !transport->fetch)
708 die(_("Don't know how to fetch from %s"), transport->url);
709
710 /* if not appending, truncate FETCH_HEAD */
711 if (!append && !dry_run) {
712 int errcode = truncate_fetch_head();
713 if (errcode)
714 return errcode;
715 }
716
717 ref_map = get_ref_map(transport, refs, ref_count, tags, &autotags);
718 if (!update_head_ok)
719 check_not_current_branch(ref_map);
720
721 for (rm = ref_map; rm; rm = rm->next) {
722 if (rm->peer_ref) {
723 peer_item = string_list_lookup(&existing_refs,
724 rm->peer_ref->name);
725 if (peer_item)
726 hashcpy(rm->peer_ref->old_sha1,
727 peer_item->util);
728 }
729 }
730
731 if (tags == TAGS_DEFAULT && autotags)
732 transport_set_option(transport, TRANS_OPT_FOLLOWTAGS, "1");
733 if (fetch_refs(transport, ref_map)) {
734 free_refs(ref_map);
735 return 1;
736 }
737 if (prune)
738 prune_refs(transport, ref_map);
739 free_refs(ref_map);
740
741 /* if neither --no-tags nor --tags was specified, do automated tag
742 * following ... */
743 if (tags == TAGS_DEFAULT && autotags) {
744 struct ref **tail = &ref_map;
745 ref_map = NULL;
746 find_non_local_tags(transport, &ref_map, &tail);
747 if (ref_map) {
748 transport_set_option(transport, TRANS_OPT_FOLLOWTAGS, NULL);
749 transport_set_option(transport, TRANS_OPT_DEPTH, "0");
750 fetch_refs(transport, ref_map);
751 }
752 free_refs(ref_map);
753 }
754
755 return 0;
756 }
757
758 static void set_option(const char *name, const char *value)
759 {
760 int r = transport_set_option(transport, name, value);
761 if (r < 0)
762 die(_("Option \"%s\" value \"%s\" is not valid for %s"),
763 name, value, transport->url);
764 if (r > 0)
765 warning(_("Option \"%s\" is ignored for %s\n"),
766 name, transport->url);
767 }
768
769 static int get_one_remote_for_fetch(struct remote *remote, void *priv)
770 {
771 struct string_list *list = priv;
772 if (!remote->skip_default_update)
773 string_list_append(list, remote->name);
774 return 0;
775 }
776
777 struct remote_group_data {
778 const char *name;
779 struct string_list *list;
780 };
781
782 static int get_remote_group(const char *key, const char *value, void *priv)
783 {
784 struct remote_group_data *g = priv;
785
786 if (!prefixcmp(key, "remotes.") &&
787 !strcmp(key + 8, g->name)) {
788 /* split list by white space */
789 int space = strcspn(value, " \t\n");
790 while (*value) {
791 if (space > 1) {
792 string_list_append(g->list,
793 xstrndup(value, space));
794 }
795 value += space + (value[space] != '\0');
796 space = strcspn(value, " \t\n");
797 }
798 }
799
800 return 0;
801 }
802
803 static int add_remote_or_group(const char *name, struct string_list *list)
804 {
805 int prev_nr = list->nr;
806 struct remote_group_data g;
807 g.name = name; g.list = list;
808
809 git_config(get_remote_group, &g);
810 if (list->nr == prev_nr) {
811 struct remote *remote;
812 if (!remote_is_configured(name))
813 return 0;
814 remote = remote_get(name);
815 string_list_append(list, remote->name);
816 }
817 return 1;
818 }
819
820 static void add_options_to_argv(int *argc, const char **argv)
821 {
822 if (dry_run)
823 argv[(*argc)++] = "--dry-run";
824 if (prune)
825 argv[(*argc)++] = "--prune";
826 if (update_head_ok)
827 argv[(*argc)++] = "--update-head-ok";
828 if (force)
829 argv[(*argc)++] = "--force";
830 if (keep)
831 argv[(*argc)++] = "--keep";
832 if (recurse_submodules == RECURSE_SUBMODULES_ON)
833 argv[(*argc)++] = "--recurse-submodules";
834 else if (recurse_submodules == RECURSE_SUBMODULES_ON_DEMAND)
835 argv[(*argc)++] = "--recurse-submodules=on-demand";
836 if (verbosity >= 2)
837 argv[(*argc)++] = "-v";
838 if (verbosity >= 1)
839 argv[(*argc)++] = "-v";
840 else if (verbosity < 0)
841 argv[(*argc)++] = "-q";
842
843 }
844
845 static int fetch_multiple(struct string_list *list)
846 {
847 int i, result = 0;
848 const char *argv[12] = { "fetch", "--append" };
849 int argc = 2;
850
851 add_options_to_argv(&argc, argv);
852
853 if (!append && !dry_run) {
854 int errcode = truncate_fetch_head();
855 if (errcode)
856 return errcode;
857 }
858
859 for (i = 0; i < list->nr; i++) {
860 const char *name = list->items[i].string;
861 argv[argc] = name;
862 argv[argc + 1] = NULL;
863 if (verbosity >= 0)
864 printf(_("Fetching %s\n"), name);
865 if (run_command_v_opt(argv, RUN_GIT_CMD)) {
866 error(_("Could not fetch %s"), name);
867 result = 1;
868 }
869 }
870
871 return result;
872 }
873
874 static int fetch_one(struct remote *remote, int argc, const char **argv)
875 {
876 int i;
877 static const char **refs = NULL;
878 int ref_nr = 0;
879 int exit_code;
880
881 if (!remote)
882 die(_("No remote repository specified. Please, specify either a URL or a\n"
883 "remote name from which new revisions should be fetched."));
884
885 transport = transport_get(remote, NULL);
886 transport_set_verbosity(transport, verbosity, progress);
887 if (upload_pack)
888 set_option(TRANS_OPT_UPLOADPACK, upload_pack);
889 if (keep)
890 set_option(TRANS_OPT_KEEP, "yes");
891 if (depth)
892 set_option(TRANS_OPT_DEPTH, depth);
893
894 if (argc > 0) {
895 int j = 0;
896 refs = xcalloc(argc + 1, sizeof(const char *));
897 for (i = 0; i < argc; i++) {
898 if (!strcmp(argv[i], "tag")) {
899 char *ref;
900 i++;
901 if (i >= argc)
902 die(_("You need to specify a tag name."));
903 ref = xmalloc(strlen(argv[i]) * 2 + 22);
904 strcpy(ref, "refs/tags/");
905 strcat(ref, argv[i]);
906 strcat(ref, ":refs/tags/");
907 strcat(ref, argv[i]);
908 refs[j++] = ref;
909 } else
910 refs[j++] = argv[i];
911 }
912 refs[j] = NULL;
913 ref_nr = j;
914 }
915
916 sigchain_push_common(unlock_pack_on_signal);
917 atexit(unlock_pack);
918 exit_code = do_fetch(transport,
919 parse_fetch_refspec(ref_nr, refs), ref_nr);
920 transport_disconnect(transport);
921 transport = NULL;
922 return exit_code;
923 }
924
925 int cmd_fetch(int argc, const char **argv, const char *prefix)
926 {
927 int i;
928 struct string_list list = STRING_LIST_INIT_NODUP;
929 struct remote *remote;
930 int result = 0;
931
932 packet_trace_identity("fetch");
933
934 /* Record the command line for the reflog */
935 strbuf_addstr(&default_rla, "fetch");
936 for (i = 1; i < argc; i++)
937 strbuf_addf(&default_rla, " %s", argv[i]);
938
939 argc = parse_options(argc, argv, prefix,
940 builtin_fetch_options, builtin_fetch_usage, 0);
941
942 if (all) {
943 if (argc == 1)
944 die(_("fetch --all does not take a repository argument"));
945 else if (argc > 1)
946 die(_("fetch --all does not make sense with refspecs"));
947 (void) for_each_remote(get_one_remote_for_fetch, &list);
948 result = fetch_multiple(&list);
949 } else if (argc == 0) {
950 /* No arguments -- use default remote */
951 remote = remote_get(NULL);
952 result = fetch_one(remote, argc, argv);
953 } else if (multiple) {
954 /* All arguments are assumed to be remotes or groups */
955 for (i = 0; i < argc; i++)
956 if (!add_remote_or_group(argv[i], &list))
957 die(_("No such remote or remote group: %s"), argv[i]);
958 result = fetch_multiple(&list);
959 } else {
960 /* Single remote or group */
961 (void) add_remote_or_group(argv[0], &list);
962 if (list.nr > 1) {
963 /* More than one remote */
964 if (argc > 1)
965 die(_("Fetching a group and specifying refspecs does not make sense"));
966 result = fetch_multiple(&list);
967 } else {
968 /* Zero or one remotes */
969 remote = remote_get(argv[0]);
970 result = fetch_one(remote, argc-1, argv+1);
971 }
972 }
973
974 if (!result && (recurse_submodules != RECURSE_SUBMODULES_OFF)) {
975 const char *options[10];
976 int num_options = 0;
977 if (recurse_submodules_default) {
978 int arg = parse_fetch_recurse_submodules_arg("--recurse-submodules-default", recurse_submodules_default);
979 set_config_fetch_recurse_submodules(arg);
980 }
981 gitmodules_config();
982 git_config(submodule_config, NULL);
983 add_options_to_argv(&num_options, options);
984 result = fetch_populated_submodules(num_options, options,
985 submodule_prefix,
986 recurse_submodules,
987 verbosity < 0);
988 }
989
990 /* All names were strdup()ed or strndup()ed */
991 list.strdup_strings = 1;
992 string_list_clear(&list, 0);
993
994 return result;
995 }