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