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"
17static 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};
25enum {
27 TAGS_UNSET = 0,
28 TAGS_DEFAULT = 1,
29 TAGS_SET = 2
30};
31static int all, append, dry_run, force, keep, multiple, prune, update_head_ok, verbosity;
33static int progress, recurse_submodules = RECURSE_SUBMODULES_DEFAULT;
34static int tags = TAGS_DEFAULT;
35static const char *depth;
36static const char *upload_pack;
37static struct strbuf default_rla = STRBUF_INIT;
38static struct transport *transport;
39static const char *submodule_prefix = "";
40static const char *recurse_submodules_default;
41static 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}
55static 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};
91static void unlock_pack(void)
93{
94 if (transport)
95 transport_unlock_pack(transport);
96}
97static void unlock_pack_on_signal(int signo)
99{
100 unlock_pack();
101 sigchain_pop(signo);
102 raise(signo);
103}
104static 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 for (i = 0; i < branch->merge_nr; i++) {
113 struct ref *rm, **old_tail = *tail;
114 struct refspec refspec;
115 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 /*
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}
142static void find_non_local_tags(struct transport *transport,
144 struct ref **head,
145 struct ref ***tail);
146static 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 const struct ref *remote_refs = transport_get_remote_refs(transport);
157 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 return ref_map;
210}
211#define STORE_REF_ERROR_OTHER 1
213#define STORE_REF_ERROR_DF_CONFLICT 2
214static 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 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#define REFCOL_WIDTH 10
240static int update_local_ref(struct ref *ref,
242 const char *remote,
243 struct strbuf *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 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 if (!hashcmp(ref->old_sha1, ref->new_sha1)) {
255 if (verbosity > 0)
256 strbuf_addf(display, "= %-*s %-*s -> %s",
257 TRANSPORT_SUMMARY_WIDTH,
258 _("[up to date]"), REFCOL_WIDTH,
259 remote, pretty_ref);
260 return 0;
261 }
262 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 strbuf_addf(display,
272 _("! %-*s %-*s -> %s (can't fetch in current branch)"),
273 TRANSPORT_SUMMARY_WIDTH, _("[rejected]"),
274 REFCOL_WIDTH, remote, pretty_ref);
275 return 1;
276 }
277 if (!is_null_sha1(ref->old_sha1) &&
279 !prefixcmp(ref->name, "refs/tags/")) {
280 int r;
281 r = s_update_ref("updating tag", ref, 0);
282 strbuf_addf(display, "%c %-*s %-*s -> %s%s",
283 r ? '!' : '-',
284 TRANSPORT_SUMMARY_WIDTH, _("[tag update]"),
285 REFCOL_WIDTH, remote, pretty_ref,
286 r ? _(" (unable to update local ref)") : "");
287 return r;
288 }
289 current = lookup_commit_reference_gently(ref->old_sha1, 1);
291 updated = lookup_commit_reference_gently(ref->new_sha1, 1);
292 if (!current || !updated) {
293 const char *msg;
294 const char *what;
295 int r;
296 if (!strncmp(ref->name, "refs/tags/", 10)) {
297 msg = "storing tag";
298 what = _("[new tag]");
299 }
300 else {
301 msg = "storing head";
302 what = _("[new branch]");
303 if ((recurse_submodules != RECURSE_SUBMODULES_OFF) &&
304 (recurse_submodules != RECURSE_SUBMODULES_ON))
305 check_for_new_submodule_commits(ref->new_sha1);
306 }
307 r = s_update_ref(msg, ref, 0);
309 strbuf_addf(display, "%c %-*s %-*s -> %s%s",
310 r ? '!' : '*',
311 TRANSPORT_SUMMARY_WIDTH, what,
312 REFCOL_WIDTH, remote, pretty_ref,
313 r ? _(" (unable to update local ref)") : "");
314 return r;
315 }
316 if (in_merge_bases(current, &updated, 1)) {
318 char quickref[83];
319 int r;
320 strcpy(quickref, find_unique_abbrev(current->object.sha1, DEFAULT_ABBREV));
321 strcat(quickref, "..");
322 strcat(quickref, find_unique_abbrev(ref->new_sha1, DEFAULT_ABBREV));
323 if ((recurse_submodules != RECURSE_SUBMODULES_OFF) &&
324 (recurse_submodules != RECURSE_SUBMODULES_ON))
325 check_for_new_submodule_commits(ref->new_sha1);
326 r = s_update_ref("fast-forward", ref, 1);
327 strbuf_addf(display, "%c %-*s %-*s -> %s%s",
328 r ? '!' : ' ',
329 TRANSPORT_SUMMARY_WIDTH, quickref,
330 REFCOL_WIDTH, remote, pretty_ref,
331 r ? _(" (unable to update local ref)") : "");
332 return r;
333 } else if (force || ref->force) {
334 char quickref[84];
335 int r;
336 strcpy(quickref, find_unique_abbrev(current->object.sha1, DEFAULT_ABBREV));
337 strcat(quickref, "...");
338 strcat(quickref, find_unique_abbrev(ref->new_sha1, DEFAULT_ABBREV));
339 if ((recurse_submodules != RECURSE_SUBMODULES_OFF) &&
340 (recurse_submodules != RECURSE_SUBMODULES_ON))
341 check_for_new_submodule_commits(ref->new_sha1);
342 r = s_update_ref("forced-update", ref, 1);
343 strbuf_addf(display, "%c %-*s %-*s -> %s (%s)",
344 r ? '!' : '+',
345 TRANSPORT_SUMMARY_WIDTH, quickref,
346 REFCOL_WIDTH, remote, pretty_ref,
347 r ? _("unable to update local ref") : _("forced update"));
348 return r;
349 } else {
350 strbuf_addf(display, "! %-*s %-*s -> %s %s",
351 TRANSPORT_SUMMARY_WIDTH, _("[rejected]"),
352 REFCOL_WIDTH, remote, pretty_ref,
353 _("(non-fast-forward)"));
354 return 1;
355 }
356}
357static int iterate_ref_map(void *cb_data, unsigned char sha1[20])
359{
360 struct ref **rm = cb_data;
361 struct ref *ref = *rm;
362 if (!ref)
364 return -1; /* end of the list */
365 *rm = ref->next;
366 hashcpy(sha1, ref->old_sha1);
367 return 0;
368}
369static int store_updated_refs(const char *raw_url, const char *remote_name,
371 struct ref *ref_map)
372{
373 FILE *fp;
374 struct commit *commit;
375 int url_len, i, shown_url = 0, rc = 0;
376 struct strbuf note = STRBUF_INIT;
377 const char *what, *kind;
378 struct ref *rm;
379 char *url, *filename = dry_run ? "/dev/null" : git_path("FETCH_HEAD");
380 fp = fopen(filename, "a");
382 if (!fp)
383 return error(_("cannot open %s: %s\n"), filename, strerror(errno));
384 if (raw_url)
386 url = transport_anonymize_url(raw_url);
387 else
388 url = xstrdup("foreign");
389 rm = ref_map;
391 if (check_everything_connected(iterate_ref_map, 0, &rm)) {
392 rc = error(_("%s did not send all necessary objects\n"), url);
393 goto abort;
394 }
395 for (rm = ref_map; rm; rm = rm->next) {
397 struct ref *ref = NULL;
398 if (rm->peer_ref) {
400 ref = xcalloc(1, sizeof(*ref) + strlen(rm->peer_ref->name) + 1);
401 strcpy(ref->name, rm->peer_ref->name);
402 hashcpy(ref->old_sha1, rm->peer_ref->old_sha1);
403 hashcpy(ref->new_sha1, rm->old_sha1);
404 ref->force = rm->peer_ref->force;
405 }
406 commit = lookup_commit_reference_gently(rm->old_sha1, 1);
408 if (!commit)
409 rm->merge = 0;
410 if (!strcmp(rm->name, "HEAD")) {
412 kind = "";
413 what = "";
414 }
415 else if (!prefixcmp(rm->name, "refs/heads/")) {
416 kind = "branch";
417 what = rm->name + 11;
418 }
419 else if (!prefixcmp(rm->name, "refs/tags/")) {
420 kind = "tag";
421 what = rm->name + 10;
422 }
423 else if (!prefixcmp(rm->name, "refs/remotes/")) {
424 kind = "remote-tracking branch";
425 what = rm->name + 13;
426 }
427 else {
428 kind = "";
429 what = rm->name;
430 }
431 url_len = strlen(url);
433 for (i = url_len - 1; url[i] == '/' && 0 <= i; i--)
434 ;
435 url_len = i + 1;
436 if (4 < i && !strncmp(".git", url + i - 3, 4))
437 url_len = i - 3;
438 strbuf_reset(¬e);
440 if (*what) {
441 if (*kind)
442 strbuf_addf(¬e, "%s ", kind);
443 strbuf_addf(¬e, "'%s' of ", what);
444 }
445 fprintf(fp, "%s\t%s\t%s",
446 sha1_to_hex(commit ? commit->object.sha1 :
447 rm->old_sha1),
448 rm->merge ? "" : "not-for-merge",
449 note.buf);
450 for (i = 0; i < url_len; ++i)
451 if ('\n' == url[i])
452 fputs("\\n", fp);
453 else
454 fputc(url[i], fp);
455 fputc('\n', fp);
456 strbuf_reset(¬e);
458 if (ref) {
459 rc |= update_local_ref(ref, what, ¬e);
460 free(ref);
461 } else
462 strbuf_addf(¬e, "* %-*s %-*s -> FETCH_HEAD",
463 TRANSPORT_SUMMARY_WIDTH,
464 *kind ? kind : "branch",
465 REFCOL_WIDTH,
466 *what ? what : "HEAD");
467 if (note.len) {
468 if (verbosity >= 0 && !shown_url) {
469 fprintf(stderr, _("From %.*s\n"),
470 url_len, url);
471 shown_url = 1;
472 }
473 if (verbosity >= 0)
474 fprintf(stderr, " %s\n", note.buf);
475 }
476 }
477 if (rc & STORE_REF_ERROR_DF_CONFLICT)
479 error(_("some local refs could not be updated; try running\n"
480 " 'git remote prune %s' to remove any old, conflicting "
481 "branches"), remote_name);
482 abort:
484 strbuf_release(¬e);
485 free(url);
486 fclose(fp);
487 return rc;
488}
489/*
491 * We would want to bypass the object transfer altogether if
492 * everything we are going to fetch already exists and is connected
493 * locally.
494 */
495static int quickfetch(struct ref *ref_map)
496{
497 struct ref *rm = ref_map;
498 /*
500 * If we are deepening a shallow clone we already have these
501 * objects reachable. Running rev-list here will return with
502 * a good (0) exit status and we'll bypass the fetch that we
503 * really need to perform. Claiming failure now will ensure
504 * we perform the network exchange to deepen our history.
505 */
506 if (depth)
507 return -1;
508 return check_everything_connected(iterate_ref_map, 1, &rm);
509}
510static int fetch_refs(struct transport *transport, struct ref *ref_map)
512{
513 int ret = quickfetch(ref_map);
514 if (ret)
515 ret = transport_fetch_refs(transport, ref_map);
516 if (!ret)
517 ret |= store_updated_refs(transport->url,
518 transport->remote->name,
519 ref_map);
520 transport_unlock_pack(transport);
521 return ret;
522}
523static int prune_refs(struct refspec *refs, int ref_count, struct ref *ref_map)
525{
526 int result = 0;
527 struct ref *ref, *stale_refs = get_stale_heads(refs, ref_count, ref_map);
528 const char *dangling_msg = dry_run
529 ? _(" (%s will become dangling)\n")
530 : _(" (%s has become dangling)\n");
531 for (ref = stale_refs; ref; ref = ref->next) {
533 if (!dry_run)
534 result |= delete_ref(ref->name, NULL, 0);
535 if (verbosity >= 0) {
536 fprintf(stderr, " x %-*s %-*s -> %s\n",
537 TRANSPORT_SUMMARY_WIDTH, _("[deleted]"),
538 REFCOL_WIDTH, _("(none)"), prettify_refname(ref->name));
539 warn_dangling_symref(stderr, dangling_msg, ref->name);
540 }
541 }
542 free_refs(stale_refs);
543 return result;
544}
545static int add_existing(const char *refname, const unsigned char *sha1,
547 int flag, void *cbdata)
548{
549 struct string_list *list = (struct string_list *)cbdata;
550 struct string_list_item *item = string_list_insert(list, refname);
551 item->util = (void *)sha1;
552 return 0;
553}
554static int will_fetch(struct ref **head, const unsigned char *sha1)
556{
557 struct ref *rm = *head;
558 while (rm) {
559 if (!hashcmp(rm->old_sha1, sha1))
560 return 1;
561 rm = rm->next;
562 }
563 return 0;
564}
565static void find_non_local_tags(struct transport *transport,
567 struct ref **head,
568 struct ref ***tail)
569{
570 struct string_list existing_refs = STRING_LIST_INIT_NODUP;
571 struct string_list remote_refs = STRING_LIST_INIT_NODUP;
572 const struct ref *ref;
573 struct string_list_item *item = NULL;
574 for_each_ref(add_existing, &existing_refs);
576 for (ref = transport_get_remote_refs(transport); ref; ref = ref->next) {
577 if (prefixcmp(ref->name, "refs/tags"))
578 continue;
579 /*
581 * The peeled ref always follows the matching base
582 * ref, so if we see a peeled ref that we don't want
583 * to fetch then we can mark the ref entry in the list
584 * as one to ignore by setting util to NULL.
585 */
586 if (!suffixcmp(ref->name, "^{}")) {
587 if (item && !has_sha1_file(ref->old_sha1) &&
588 !will_fetch(head, ref->old_sha1) &&
589 !has_sha1_file(item->util) &&
590 !will_fetch(head, item->util))
591 item->util = NULL;
592 item = NULL;
593 continue;
594 }
595 /*
597 * If item is non-NULL here, then we previously saw a
598 * ref not followed by a peeled reference, so we need
599 * to check if it is a lightweight tag that we want to
600 * fetch.
601 */
602 if (item && !has_sha1_file(item->util) &&
603 !will_fetch(head, item->util))
604 item->util = NULL;
605 item = NULL;
607 /* skip duplicates and refs that we already have */
609 if (string_list_has_string(&remote_refs, ref->name) ||
610 string_list_has_string(&existing_refs, ref->name))
611 continue;
612 item = string_list_insert(&remote_refs, ref->name);
614 item->util = (void *)ref->old_sha1;
615 }
616 string_list_clear(&existing_refs, 0);
617 /*
619 * We may have a final lightweight tag that needs to be
620 * checked to see if it needs fetching.
621 */
622 if (item && !has_sha1_file(item->util) &&
623 !will_fetch(head, item->util))
624 item->util = NULL;
625 /*
627 * For all the tags in the remote_refs string list,
628 * add them to the list of refs to be fetched
629 */
630 for_each_string_list_item(item, &remote_refs) {
631 /* Unless we have already decided to ignore this item... */
632 if (item->util)
633 {
634 struct ref *rm = alloc_ref(item->string);
635 rm->peer_ref = alloc_ref(item->string);
636 hashcpy(rm->old_sha1, item->util);
637 **tail = rm;
638 *tail = &rm->next;
639 }
640 }
641 string_list_clear(&remote_refs, 0);
643}
644static void check_not_current_branch(struct ref *ref_map)
646{
647 struct branch *current_branch = branch_get(NULL);
648 if (is_bare_repository() || !current_branch)
650 return;
651 for (; ref_map; ref_map = ref_map->next)
653 if (ref_map->peer_ref && !strcmp(current_branch->refname,
654 ref_map->peer_ref->name))
655 die(_("Refusing to fetch into current branch %s "
656 "of non-bare repository"), current_branch->refname);
657}
658static int truncate_fetch_head(void)
660{
661 char *filename = git_path("FETCH_HEAD");
662 FILE *fp = fopen(filename, "w");
663 if (!fp)
665 return error(_("cannot open %s: %s\n"), filename, strerror(errno));
666 fclose(fp);
667 return 0;
668}
669static int do_fetch(struct transport *transport,
671 struct refspec *refs, int ref_count)
672{
673 struct string_list existing_refs = STRING_LIST_INIT_NODUP;
674 struct string_list_item *peer_item = NULL;
675 struct ref *ref_map;
676 struct ref *rm;
677 int autotags = (transport->remote->fetch_tags == 1);
678 for_each_ref(add_existing, &existing_refs);
680 if (tags == TAGS_DEFAULT) {
682 if (transport->remote->fetch_tags == 2)
683 tags = TAGS_SET;
684 if (transport->remote->fetch_tags == -1)
685 tags = TAGS_UNSET;
686 }
687 if (!transport->get_refs_list || !transport->fetch)
689 die(_("Don't know how to fetch from %s"), transport->url);
690 /* if not appending, truncate FETCH_HEAD */
692 if (!append && !dry_run) {
693 int errcode = truncate_fetch_head();
694 if (errcode)
695 return errcode;
696 }
697 ref_map = get_ref_map(transport, refs, ref_count, tags, &autotags);
699 if (!update_head_ok)
700 check_not_current_branch(ref_map);
701 for (rm = ref_map; rm; rm = rm->next) {
703 if (rm->peer_ref) {
704 peer_item = string_list_lookup(&existing_refs,
705 rm->peer_ref->name);
706 if (peer_item)
707 hashcpy(rm->peer_ref->old_sha1,
708 peer_item->util);
709 }
710 }
711 if (tags == TAGS_DEFAULT && autotags)
713 transport_set_option(transport, TRANS_OPT_FOLLOWTAGS, "1");
714 if (fetch_refs(transport, ref_map)) {
715 free_refs(ref_map);
716 return 1;
717 }
718 if (prune) {
719 /* If --tags was specified, pretend the user gave us the canonical tags refspec */
720 if (tags == TAGS_SET) {
721 const char *tags_str = "refs/tags/*:refs/tags/*";
722 struct refspec *tags_refspec, *refspec;
723 /* Copy the refspec and add the tags to it */
725 refspec = xcalloc(ref_count + 1, sizeof(struct refspec));
726 tags_refspec = parse_fetch_refspec(1, &tags_str);
727 memcpy(refspec, refs, ref_count * sizeof(struct refspec));
728 memcpy(&refspec[ref_count], tags_refspec, sizeof(struct refspec));
729 ref_count++;
730 prune_refs(refspec, ref_count, ref_map);
732 ref_count--;
734 /* The rest of the strings belong to fetch_one */
735 free_refspec(1, tags_refspec);
736 free(refspec);
737 } else if (ref_count) {
738 prune_refs(refs, ref_count, ref_map);
739 } else {
740 prune_refs(transport->remote->fetch, transport->remote->fetch_refspec_nr, ref_map);
741 }
742 }
743 free_refs(ref_map);
744 /* if neither --no-tags nor --tags was specified, do automated tag
746 * following ... */
747 if (tags == TAGS_DEFAULT && autotags) {
748 struct ref **tail = &ref_map;
749 ref_map = NULL;
750 find_non_local_tags(transport, &ref_map, &tail);
751 if (ref_map) {
752 transport_set_option(transport, TRANS_OPT_FOLLOWTAGS, NULL);
753 transport_set_option(transport, TRANS_OPT_DEPTH, "0");
754 fetch_refs(transport, ref_map);
755 }
756 free_refs(ref_map);
757 }
758 return 0;
760}
761static void set_option(const char *name, const char *value)
763{
764 int r = transport_set_option(transport, name, value);
765 if (r < 0)
766 die(_("Option \"%s\" value \"%s\" is not valid for %s"),
767 name, value, transport->url);
768 if (r > 0)
769 warning(_("Option \"%s\" is ignored for %s\n"),
770 name, transport->url);
771}
772static int get_one_remote_for_fetch(struct remote *remote, void *priv)
774{
775 struct string_list *list = priv;
776 if (!remote->skip_default_update)
777 string_list_append(list, remote->name);
778 return 0;
779}
780struct remote_group_data {
782 const char *name;
783 struct string_list *list;
784};
785static int get_remote_group(const char *key, const char *value, void *priv)
787{
788 struct remote_group_data *g = priv;
789 if (!prefixcmp(key, "remotes.") &&
791 !strcmp(key + 8, g->name)) {
792 /* split list by white space */
793 int space = strcspn(value, " \t\n");
794 while (*value) {
795 if (space > 1) {
796 string_list_append(g->list,
797 xstrndup(value, space));
798 }
799 value += space + (value[space] != '\0');
800 space = strcspn(value, " \t\n");
801 }
802 }
803 return 0;
805}
806static int add_remote_or_group(const char *name, struct string_list *list)
808{
809 int prev_nr = list->nr;
810 struct remote_group_data g;
811 g.name = name; g.list = list;
812 git_config(get_remote_group, &g);
814 if (list->nr == prev_nr) {
815 struct remote *remote;
816 if (!remote_is_configured(name))
817 return 0;
818 remote = remote_get(name);
819 string_list_append(list, remote->name);
820 }
821 return 1;
822}
823static void add_options_to_argv(int *argc, const char **argv)
825{
826 if (dry_run)
827 argv[(*argc)++] = "--dry-run";
828 if (prune)
829 argv[(*argc)++] = "--prune";
830 if (update_head_ok)
831 argv[(*argc)++] = "--update-head-ok";
832 if (force)
833 argv[(*argc)++] = "--force";
834 if (keep)
835 argv[(*argc)++] = "--keep";
836 if (recurse_submodules == RECURSE_SUBMODULES_ON)
837 argv[(*argc)++] = "--recurse-submodules";
838 else if (recurse_submodules == RECURSE_SUBMODULES_ON_DEMAND)
839 argv[(*argc)++] = "--recurse-submodules=on-demand";
840 if (verbosity >= 2)
841 argv[(*argc)++] = "-v";
842 if (verbosity >= 1)
843 argv[(*argc)++] = "-v";
844 else if (verbosity < 0)
845 argv[(*argc)++] = "-q";
846}
848static int fetch_multiple(struct string_list *list)
850{
851 int i, result = 0;
852 const char *argv[12] = { "fetch", "--append" };
853 int argc = 2;
854 add_options_to_argv(&argc, argv);
856 if (!append && !dry_run) {
858 int errcode = truncate_fetch_head();
859 if (errcode)
860 return errcode;
861 }
862 for (i = 0; i < list->nr; i++) {
864 const char *name = list->items[i].string;
865 argv[argc] = name;
866 argv[argc + 1] = NULL;
867 if (verbosity >= 0)
868 printf(_("Fetching %s\n"), name);
869 if (run_command_v_opt(argv, RUN_GIT_CMD)) {
870 error(_("Could not fetch %s"), name);
871 result = 1;
872 }
873 }
874 return result;
876}
877static int fetch_one(struct remote *remote, int argc, const char **argv)
879{
880 int i;
881 static const char **refs = NULL;
882 struct refspec *refspec;
883 int ref_nr = 0;
884 int exit_code;
885 if (!remote)
887 die(_("No remote repository specified. Please, specify either a URL or a\n"
888 "remote name from which new revisions should be fetched."));
889 transport = transport_get(remote, NULL);
891 transport_set_verbosity(transport, verbosity, progress);
892 if (upload_pack)
893 set_option(TRANS_OPT_UPLOADPACK, upload_pack);
894 if (keep)
895 set_option(TRANS_OPT_KEEP, "yes");
896 if (depth)
897 set_option(TRANS_OPT_DEPTH, depth);
898 if (argc > 0) {
900 int j = 0;
901 refs = xcalloc(argc + 1, sizeof(const char *));
902 for (i = 0; i < argc; i++) {
903 if (!strcmp(argv[i], "tag")) {
904 char *ref;
905 i++;
906 if (i >= argc)
907 die(_("You need to specify a tag name."));
908 ref = xmalloc(strlen(argv[i]) * 2 + 22);
909 strcpy(ref, "refs/tags/");
910 strcat(ref, argv[i]);
911 strcat(ref, ":refs/tags/");
912 strcat(ref, argv[i]);
913 refs[j++] = ref;
914 } else
915 refs[j++] = argv[i];
916 }
917 refs[j] = NULL;
918 ref_nr = j;
919 }
920 sigchain_push_common(unlock_pack_on_signal);
922 atexit(unlock_pack);
923 refspec = parse_fetch_refspec(ref_nr, refs);
924 exit_code = do_fetch(transport, refspec, ref_nr);
925 free_refspec(ref_nr, refspec);
926 transport_disconnect(transport);
927 transport = NULL;
928 return exit_code;
929}
930int cmd_fetch(int argc, const char **argv, const char *prefix)
932{
933 int i;
934 struct string_list list = STRING_LIST_INIT_NODUP;
935 struct remote *remote;
936 int result = 0;
937 packet_trace_identity("fetch");
939 /* Record the command line for the reflog */
941 strbuf_addstr(&default_rla, "fetch");
942 for (i = 1; i < argc; i++)
943 strbuf_addf(&default_rla, " %s", argv[i]);
944 argc = parse_options(argc, argv, prefix,
946 builtin_fetch_options, builtin_fetch_usage, 0);
947 if (recurse_submodules != RECURSE_SUBMODULES_OFF) {
949 if (recurse_submodules_default) {
950 int arg = parse_fetch_recurse_submodules_arg("--recurse-submodules-default", recurse_submodules_default);
951 set_config_fetch_recurse_submodules(arg);
952 }
953 gitmodules_config();
954 git_config(submodule_config, NULL);
955 }
956 if (all) {
958 if (argc == 1)
959 die(_("fetch --all does not take a repository argument"));
960 else if (argc > 1)
961 die(_("fetch --all does not make sense with refspecs"));
962 (void) for_each_remote(get_one_remote_for_fetch, &list);
963 result = fetch_multiple(&list);
964 } else if (argc == 0) {
965 /* No arguments -- use default remote */
966 remote = remote_get(NULL);
967 result = fetch_one(remote, argc, argv);
968 } else if (multiple) {
969 /* All arguments are assumed to be remotes or groups */
970 for (i = 0; i < argc; i++)
971 if (!add_remote_or_group(argv[i], &list))
972 die(_("No such remote or remote group: %s"), argv[i]);
973 result = fetch_multiple(&list);
974 } else {
975 /* Single remote or group */
976 (void) add_remote_or_group(argv[0], &list);
977 if (list.nr > 1) {
978 /* More than one remote */
979 if (argc > 1)
980 die(_("Fetching a group and specifying refspecs does not make sense"));
981 result = fetch_multiple(&list);
982 } else {
983 /* Zero or one remotes */
984 remote = remote_get(argv[0]);
985 result = fetch_one(remote, argc-1, argv+1);
986 }
987 }
988 if (!result && (recurse_submodules != RECURSE_SUBMODULES_OFF)) {
990 const char *options[10];
991 int num_options = 0;
992 add_options_to_argv(&num_options, options);
993 result = fetch_populated_submodules(num_options, options,
994 submodule_prefix,
995 recurse_submodules,
996 verbosity < 0);
997 }
998 /* All names were strdup()ed or strndup()ed */
1000 list.strdup_strings = 1;
1001 string_list_clear(&list, 0);
1002 return result;
1004}