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#include "argv-array.h"
18static const char * const builtin_fetch_usage[] = {
20 N_("git fetch [<options>] [<repository> [<refspec>...]]"),
21 N_("git fetch [<options>] <group>"),
22 N_("git fetch --multiple [<options>] [(<repository> | <group>)...]"),
23 N_("git fetch --all [<options>]"),
24 NULL
25};
26enum {
28 TAGS_UNSET = 0,
29 TAGS_DEFAULT = 1,
30 TAGS_SET = 2
31};
32static int all, append, dry_run, force, keep, multiple, prune, update_head_ok, verbosity;
34static int progress = -1, recurse_submodules = RECURSE_SUBMODULES_DEFAULT;
35static int tags = TAGS_DEFAULT;
36static const char *depth;
37static const char *upload_pack;
38static struct strbuf default_rla = STRBUF_INIT;
39static struct transport *transport;
40static const char *submodule_prefix = "";
41static const char *recurse_submodules_default;
42static int option_parse_recurse_submodules(const struct option *opt,
44 const char *arg, int unset)
45{
46 if (unset) {
47 recurse_submodules = RECURSE_SUBMODULES_OFF;
48 } else {
49 if (arg)
50 recurse_submodules = parse_fetch_recurse_submodules_arg(opt->long_name, arg);
51 else
52 recurse_submodules = RECURSE_SUBMODULES_ON;
53 }
54 return 0;
55}
56static struct option builtin_fetch_options[] = {
58 OPT__VERBOSITY(&verbosity),
59 OPT_BOOLEAN(0, "all", &all,
60 N_("fetch from all remotes")),
61 OPT_BOOLEAN('a', "append", &append,
62 N_("append to .git/FETCH_HEAD instead of overwriting")),
63 OPT_STRING(0, "upload-pack", &upload_pack, N_("path"),
64 N_("path to upload pack on remote end")),
65 OPT__FORCE(&force, N_("force overwrite of local branch")),
66 OPT_BOOLEAN('m', "multiple", &multiple,
67 N_("fetch from multiple remotes")),
68 OPT_SET_INT('t', "tags", &tags,
69 N_("fetch all tags and associated objects"), TAGS_SET),
70 OPT_SET_INT('n', NULL, &tags,
71 N_("do not fetch all tags (--no-tags)"), TAGS_UNSET),
72 OPT_BOOLEAN('p', "prune", &prune,
73 N_("prune remote-tracking branches no longer on remote")),
74 { OPTION_CALLBACK, 0, "recurse-submodules", NULL, N_("on-demand"),
75 N_("control recursive fetching of submodules"),
76 PARSE_OPT_OPTARG, option_parse_recurse_submodules },
77 OPT_BOOLEAN(0, "dry-run", &dry_run,
78 N_("dry run")),
79 OPT_BOOLEAN('k', "keep", &keep, N_("keep downloaded pack")),
80 OPT_BOOLEAN('u', "update-head-ok", &update_head_ok,
81 N_("allow updating of HEAD ref")),
82 OPT_BOOL(0, "progress", &progress, N_("force progress reporting")),
83 OPT_STRING(0, "depth", &depth, N_("depth"),
84 N_("deepen history of shallow clone")),
85 { OPTION_STRING, 0, "submodule-prefix", &submodule_prefix, N_("dir"),
86 N_("prepend this to submodule path output"), PARSE_OPT_HIDDEN },
87 { OPTION_STRING, 0, "recurse-submodules-default",
88 &recurse_submodules_default, NULL,
89 N_("default mode for recursion"), PARSE_OPT_HIDDEN },
90 OPT_END()
91};
92static void unlock_pack(void)
94{
95 if (transport)
96 transport_unlock_pack(transport);
97}
98static void unlock_pack_on_signal(int signo)
100{
101 unlock_pack();
102 sigchain_pop(signo);
103 raise(signo);
104}
105static void add_merge_config(struct ref **head,
107 const struct ref *remote_refs,
108 struct branch *branch,
109 struct ref ***tail)
110{
111 int i;
112 for (i = 0; i < branch->merge_nr; i++) {
114 struct ref *rm, **old_tail = *tail;
115 struct refspec refspec;
116 for (rm = *head; rm; rm = rm->next) {
118 if (branch_merge_matches(branch, i, rm->name)) {
119 rm->merge = 1;
120 break;
121 }
122 }
123 if (rm)
124 continue;
125 /*
127 * Not fetched to a remote-tracking branch? We need to fetch
128 * it anyway to allow this branch's "branch.$name.merge"
129 * to be honored by 'git pull', but we do not have to
130 * fail if branch.$name.merge is misconfigured to point
131 * at a nonexisting branch. If we were indeed called by
132 * 'git pull', it will notice the misconfiguration because
133 * there is no entry in the resulting FETCH_HEAD marked
134 * for merging.
135 */
136 memset(&refspec, 0, sizeof(refspec));
137 refspec.src = branch->merge[i]->src;
138 get_fetch_map(remote_refs, &refspec, tail, 1);
139 for (rm = *old_tail; rm; rm = rm->next)
140 rm->merge = 1;
141 }
142}
143static void find_non_local_tags(struct transport *transport,
145 struct ref **head,
146 struct ref ***tail);
147static struct ref *get_ref_map(struct transport *transport,
149 struct refspec *refs, int ref_count, int tags,
150 int *autotags)
151{
152 int i;
153 struct ref *rm;
154 struct ref *ref_map = NULL;
155 struct ref **tail = &ref_map;
156 const struct ref *remote_refs = transport_get_remote_refs(transport);
158 if (ref_count || tags == TAGS_SET) {
160 for (i = 0; i < ref_count; i++) {
161 get_fetch_map(remote_refs, &refs[i], &tail, 0);
162 if (refs[i].dst && refs[i].dst[0])
163 *autotags = 1;
164 }
165 /* Merge everything on the command line, but not --tags */
166 for (rm = ref_map; rm; rm = rm->next)
167 rm->merge = 1;
168 if (tags == TAGS_SET)
169 get_fetch_map(remote_refs, tag_refspec, &tail, 0);
170 } else {
171 /* Use the defaults */
172 struct remote *remote = transport->remote;
173 struct branch *branch = branch_get(NULL);
174 int has_merge = branch_has_merge_config(branch);
175 if (remote &&
176 (remote->fetch_refspec_nr ||
177 /* Note: has_merge implies non-NULL branch->remote_name */
178 (has_merge && !strcmp(branch->remote_name, remote->name)))) {
179 for (i = 0; i < remote->fetch_refspec_nr; i++) {
180 get_fetch_map(remote_refs, &remote->fetch[i], &tail, 0);
181 if (remote->fetch[i].dst &&
182 remote->fetch[i].dst[0])
183 *autotags = 1;
184 if (!i && !has_merge && ref_map &&
185 !remote->fetch[0].pattern)
186 ref_map->merge = 1;
187 }
188 /*
189 * if the remote we're fetching from is the same
190 * as given in branch.<name>.remote, we add the
191 * ref given in branch.<name>.merge, too.
192 *
193 * Note: has_merge implies non-NULL branch->remote_name
194 */
195 if (has_merge &&
196 !strcmp(branch->remote_name, remote->name))
197 add_merge_config(&ref_map, remote_refs, branch, &tail);
198 } else {
199 ref_map = get_remote_ref(remote_refs, "HEAD");
200 if (!ref_map)
201 die(_("Couldn't find remote ref HEAD"));
202 ref_map->merge = 1;
203 tail = &ref_map->next;
204 }
205 }
206 if (tags == TAGS_DEFAULT && *autotags)
207 find_non_local_tags(transport, &ref_map, &tail);
208 ref_remove_duplicates(ref_map);
209 return ref_map;
211}
212#define STORE_REF_ERROR_OTHER 1
214#define STORE_REF_ERROR_DF_CONFLICT 2
215static int s_update_ref(const char *action,
217 struct ref *ref,
218 int check_old)
219{
220 char msg[1024];
221 char *rla = getenv("GIT_REFLOG_ACTION");
222 static struct ref_lock *lock;
223 if (dry_run)
225 return 0;
226 if (!rla)
227 rla = default_rla.buf;
228 snprintf(msg, sizeof(msg), "%s: %s", rla, action);
229 lock = lock_any_ref_for_update(ref->name,
230 check_old ? ref->old_sha1 : NULL, 0);
231 if (!lock)
232 return errno == ENOTDIR ? STORE_REF_ERROR_DF_CONFLICT :
233 STORE_REF_ERROR_OTHER;
234 if (write_ref_sha1(lock, ref->new_sha1, msg) < 0)
235 return errno == ENOTDIR ? STORE_REF_ERROR_DF_CONFLICT :
236 STORE_REF_ERROR_OTHER;
237 return 0;
238}
239#define REFCOL_WIDTH 10
241static int update_local_ref(struct ref *ref,
243 const char *remote,
244 const struct ref *remote_ref,
245 struct strbuf *display)
246{
247 struct commit *current = NULL, *updated;
248 enum object_type type;
249 struct branch *current_branch = branch_get(NULL);
250 const char *pretty_ref = prettify_refname(ref->name);
251 type = sha1_object_info(ref->new_sha1, NULL);
253 if (type < 0)
254 die(_("object %s not found"), sha1_to_hex(ref->new_sha1));
255 if (!hashcmp(ref->old_sha1, ref->new_sha1)) {
257 if (verbosity > 0)
258 strbuf_addf(display, "= %-*s %-*s -> %s",
259 TRANSPORT_SUMMARY_WIDTH,
260 _("[up to date]"), REFCOL_WIDTH,
261 remote, pretty_ref);
262 return 0;
263 }
264 if (current_branch &&
266 !strcmp(ref->name, current_branch->name) &&
267 !(update_head_ok || is_bare_repository()) &&
268 !is_null_sha1(ref->old_sha1)) {
269 /*
270 * If this is the head, and it's not okay to update
271 * the head, and the old value of the head isn't empty...
272 */
273 strbuf_addf(display,
274 _("! %-*s %-*s -> %s (can't fetch in current branch)"),
275 TRANSPORT_SUMMARY_WIDTH, _("[rejected]"),
276 REFCOL_WIDTH, remote, pretty_ref);
277 return 1;
278 }
279 if (!is_null_sha1(ref->old_sha1) &&
281 !prefixcmp(ref->name, "refs/tags/")) {
282 int r;
283 r = s_update_ref("updating tag", ref, 0);
284 strbuf_addf(display, "%c %-*s %-*s -> %s%s",
285 r ? '!' : '-',
286 TRANSPORT_SUMMARY_WIDTH, _("[tag update]"),
287 REFCOL_WIDTH, remote, pretty_ref,
288 r ? _(" (unable to update local ref)") : "");
289 return r;
290 }
291 current = lookup_commit_reference_gently(ref->old_sha1, 1);
293 updated = lookup_commit_reference_gently(ref->new_sha1, 1);
294 if (!current || !updated) {
295 const char *msg;
296 const char *what;
297 int r;
298 /*
299 * Nicely describe the new ref we're fetching.
300 * Base this on the remote's ref name, as it's
301 * more likely to follow a standard layout.
302 */
303 const char *name = remote_ref ? remote_ref->name : "";
304 if (!prefixcmp(name, "refs/tags/")) {
305 msg = "storing tag";
306 what = _("[new tag]");
307 } else if (!prefixcmp(name, "refs/heads/")) {
308 msg = "storing head";
309 what = _("[new branch]");
310 } else {
311 msg = "storing ref";
312 what = _("[new ref]");
313 }
314 if ((recurse_submodules != RECURSE_SUBMODULES_OFF) &&
316 (recurse_submodules != RECURSE_SUBMODULES_ON))
317 check_for_new_submodule_commits(ref->new_sha1);
318 r = s_update_ref(msg, ref, 0);
319 strbuf_addf(display, "%c %-*s %-*s -> %s%s",
320 r ? '!' : '*',
321 TRANSPORT_SUMMARY_WIDTH, what,
322 REFCOL_WIDTH, remote, pretty_ref,
323 r ? _(" (unable to update local ref)") : "");
324 return r;
325 }
326 if (in_merge_bases(current, updated)) {
328 char quickref[83];
329 int r;
330 strcpy(quickref, find_unique_abbrev(current->object.sha1, DEFAULT_ABBREV));
331 strcat(quickref, "..");
332 strcat(quickref, find_unique_abbrev(ref->new_sha1, DEFAULT_ABBREV));
333 if ((recurse_submodules != RECURSE_SUBMODULES_OFF) &&
334 (recurse_submodules != RECURSE_SUBMODULES_ON))
335 check_for_new_submodule_commits(ref->new_sha1);
336 r = s_update_ref("fast-forward", ref, 1);
337 strbuf_addf(display, "%c %-*s %-*s -> %s%s",
338 r ? '!' : ' ',
339 TRANSPORT_SUMMARY_WIDTH, quickref,
340 REFCOL_WIDTH, remote, pretty_ref,
341 r ? _(" (unable to update local ref)") : "");
342 return r;
343 } else if (force || ref->force) {
344 char quickref[84];
345 int r;
346 strcpy(quickref, find_unique_abbrev(current->object.sha1, DEFAULT_ABBREV));
347 strcat(quickref, "...");
348 strcat(quickref, find_unique_abbrev(ref->new_sha1, DEFAULT_ABBREV));
349 if ((recurse_submodules != RECURSE_SUBMODULES_OFF) &&
350 (recurse_submodules != RECURSE_SUBMODULES_ON))
351 check_for_new_submodule_commits(ref->new_sha1);
352 r = s_update_ref("forced-update", ref, 1);
353 strbuf_addf(display, "%c %-*s %-*s -> %s (%s)",
354 r ? '!' : '+',
355 TRANSPORT_SUMMARY_WIDTH, quickref,
356 REFCOL_WIDTH, remote, pretty_ref,
357 r ? _("unable to update local ref") : _("forced update"));
358 return r;
359 } else {
360 strbuf_addf(display, "! %-*s %-*s -> %s %s",
361 TRANSPORT_SUMMARY_WIDTH, _("[rejected]"),
362 REFCOL_WIDTH, remote, pretty_ref,
363 _("(non-fast-forward)"));
364 return 1;
365 }
366}
367static int iterate_ref_map(void *cb_data, unsigned char sha1[20])
369{
370 struct ref **rm = cb_data;
371 struct ref *ref = *rm;
372 if (!ref)
374 return -1; /* end of the list */
375 *rm = ref->next;
376 hashcpy(sha1, ref->old_sha1);
377 return 0;
378}
379static int store_updated_refs(const char *raw_url, const char *remote_name,
381 struct ref *ref_map)
382{
383 FILE *fp;
384 struct commit *commit;
385 int url_len, i, shown_url = 0, rc = 0;
386 struct strbuf note = STRBUF_INIT;
387 const char *what, *kind;
388 struct ref *rm;
389 char *url, *filename = dry_run ? "/dev/null" : git_path("FETCH_HEAD");
390 int want_merge;
391 fp = fopen(filename, "a");
393 if (!fp)
394 return error(_("cannot open %s: %s\n"), filename, strerror(errno));
395 if (raw_url)
397 url = transport_anonymize_url(raw_url);
398 else
399 url = xstrdup("foreign");
400 rm = ref_map;
402 if (check_everything_connected(iterate_ref_map, 0, &rm)) {
403 rc = error(_("%s did not send all necessary objects\n"), url);
404 goto abort;
405 }
406 /*
408 * The first pass writes objects to be merged and then the
409 * second pass writes the rest, in order to allow using
410 * FETCH_HEAD as a refname to refer to the ref to be merged.
411 */
412 for (want_merge = 1; 0 <= want_merge; want_merge--) {
413 for (rm = ref_map; rm; rm = rm->next) {
414 struct ref *ref = NULL;
415 commit = lookup_commit_reference_gently(rm->old_sha1, 1);
417 if (!commit)
418 rm->merge = 0;
419 if (rm->merge != want_merge)
421 continue;
422 if (rm->peer_ref) {
424 ref = xcalloc(1, sizeof(*ref) + strlen(rm->peer_ref->name) + 1);
425 strcpy(ref->name, rm->peer_ref->name);
426 hashcpy(ref->old_sha1, rm->peer_ref->old_sha1);
427 hashcpy(ref->new_sha1, rm->old_sha1);
428 ref->force = rm->peer_ref->force;
429 }
430 if (!strcmp(rm->name, "HEAD")) {
433 kind = "";
434 what = "";
435 }
436 else if (!prefixcmp(rm->name, "refs/heads/")) {
437 kind = "branch";
438 what = rm->name + 11;
439 }
440 else if (!prefixcmp(rm->name, "refs/tags/")) {
441 kind = "tag";
442 what = rm->name + 10;
443 }
444 else if (!prefixcmp(rm->name, "refs/remotes/")) {
445 kind = "remote-tracking branch";
446 what = rm->name + 13;
447 }
448 else {
449 kind = "";
450 what = rm->name;
451 }
452 url_len = strlen(url);
454 for (i = url_len - 1; url[i] == '/' && 0 <= i; i--)
455 ;
456 url_len = i + 1;
457 if (4 < i && !strncmp(".git", url + i - 3, 4))
458 url_len = i - 3;
459 strbuf_reset(¬e);
461 if (*what) {
462 if (*kind)
463 strbuf_addf(¬e, "%s ", kind);
464 strbuf_addf(¬e, "'%s' of ", what);
465 }
466 fprintf(fp, "%s\t%s\t%s",
467 sha1_to_hex(rm->old_sha1),
468 rm->merge ? "" : "not-for-merge",
469 note.buf);
470 for (i = 0; i < url_len; ++i)
471 if ('\n' == url[i])
472 fputs("\\n", fp);
473 else
474 fputc(url[i], fp);
475 fputc('\n', fp);
476 strbuf_reset(¬e);
478 if (ref) {
479 rc |= update_local_ref(ref, what, rm, ¬e);
480 free(ref);
481 } else
482 strbuf_addf(¬e, "* %-*s %-*s -> FETCH_HEAD",
483 TRANSPORT_SUMMARY_WIDTH,
484 *kind ? kind : "branch",
485 REFCOL_WIDTH,
486 *what ? what : "HEAD");
487 if (note.len) {
488 if (verbosity >= 0 && !shown_url) {
489 fprintf(stderr, _("From %.*s\n"),
490 url_len, url);
491 shown_url = 1;
492 }
493 if (verbosity >= 0)
494 fprintf(stderr, " %s\n", note.buf);
495 }
496 }
497 }
498 if (rc & STORE_REF_ERROR_DF_CONFLICT)
500 error(_("some local refs could not be updated; try running\n"
501 " 'git remote prune %s' to remove any old, conflicting "
502 "branches"), remote_name);
503 abort:
505 strbuf_release(¬e);
506 free(url);
507 fclose(fp);
508 return rc;
509}
510/*
512 * We would want to bypass the object transfer altogether if
513 * everything we are going to fetch already exists and is connected
514 * locally.
515 */
516static int quickfetch(struct ref *ref_map)
517{
518 struct ref *rm = ref_map;
519 /*
521 * If we are deepening a shallow clone we already have these
522 * objects reachable. Running rev-list here will return with
523 * a good (0) exit status and we'll bypass the fetch that we
524 * really need to perform. Claiming failure now will ensure
525 * we perform the network exchange to deepen our history.
526 */
527 if (depth)
528 return -1;
529 return check_everything_connected(iterate_ref_map, 1, &rm);
530}
531static int fetch_refs(struct transport *transport, struct ref *ref_map)
533{
534 int ret = quickfetch(ref_map);
535 if (ret)
536 ret = transport_fetch_refs(transport, ref_map);
537 if (!ret)
538 ret |= store_updated_refs(transport->url,
539 transport->remote->name,
540 ref_map);
541 transport_unlock_pack(transport);
542 return ret;
543}
544static int prune_refs(struct refspec *refs, int ref_count, struct ref *ref_map)
546{
547 int result = 0;
548 struct ref *ref, *stale_refs = get_stale_heads(refs, ref_count, ref_map);
549 const char *dangling_msg = dry_run
550 ? _(" (%s will become dangling)")
551 : _(" (%s has become dangling)");
552 for (ref = stale_refs; ref; ref = ref->next) {
554 if (!dry_run)
555 result |= delete_ref(ref->name, NULL, 0);
556 if (verbosity >= 0) {
557 fprintf(stderr, " x %-*s %-*s -> %s\n",
558 TRANSPORT_SUMMARY_WIDTH, _("[deleted]"),
559 REFCOL_WIDTH, _("(none)"), prettify_refname(ref->name));
560 warn_dangling_symref(stderr, dangling_msg, ref->name);
561 }
562 }
563 free_refs(stale_refs);
564 return result;
565}
566static int add_existing(const char *refname, const unsigned char *sha1,
568 int flag, void *cbdata)
569{
570 struct string_list *list = (struct string_list *)cbdata;
571 struct string_list_item *item = string_list_insert(list, refname);
572 item->util = (void *)sha1;
573 return 0;
574}
575static int will_fetch(struct ref **head, const unsigned char *sha1)
577{
578 struct ref *rm = *head;
579 while (rm) {
580 if (!hashcmp(rm->old_sha1, sha1))
581 return 1;
582 rm = rm->next;
583 }
584 return 0;
585}
586static void find_non_local_tags(struct transport *transport,
588 struct ref **head,
589 struct ref ***tail)
590{
591 struct string_list existing_refs = STRING_LIST_INIT_NODUP;
592 struct string_list remote_refs = STRING_LIST_INIT_NODUP;
593 const struct ref *ref;
594 struct string_list_item *item = NULL;
595 for_each_ref(add_existing, &existing_refs);
597 for (ref = transport_get_remote_refs(transport); ref; ref = ref->next) {
598 if (prefixcmp(ref->name, "refs/tags/"))
599 continue;
600 /*
602 * The peeled ref always follows the matching base
603 * ref, so if we see a peeled ref that we don't want
604 * to fetch then we can mark the ref entry in the list
605 * as one to ignore by setting util to NULL.
606 */
607 if (!suffixcmp(ref->name, "^{}")) {
608 if (item && !has_sha1_file(ref->old_sha1) &&
609 !will_fetch(head, ref->old_sha1) &&
610 !has_sha1_file(item->util) &&
611 !will_fetch(head, item->util))
612 item->util = NULL;
613 item = NULL;
614 continue;
615 }
616 /*
618 * If item is non-NULL here, then we previously saw a
619 * ref not followed by a peeled reference, so we need
620 * to check if it is a lightweight tag that we want to
621 * fetch.
622 */
623 if (item && !has_sha1_file(item->util) &&
624 !will_fetch(head, item->util))
625 item->util = NULL;
626 item = NULL;
628 /* skip duplicates and refs that we already have */
630 if (string_list_has_string(&remote_refs, ref->name) ||
631 string_list_has_string(&existing_refs, ref->name))
632 continue;
633 item = string_list_insert(&remote_refs, ref->name);
635 item->util = (void *)ref->old_sha1;
636 }
637 string_list_clear(&existing_refs, 0);
638 /*
640 * We may have a final lightweight tag that needs to be
641 * checked to see if it needs fetching.
642 */
643 if (item && !has_sha1_file(item->util) &&
644 !will_fetch(head, item->util))
645 item->util = NULL;
646 /*
648 * For all the tags in the remote_refs string list,
649 * add them to the list of refs to be fetched
650 */
651 for_each_string_list_item(item, &remote_refs) {
652 /* Unless we have already decided to ignore this item... */
653 if (item->util)
654 {
655 struct ref *rm = alloc_ref(item->string);
656 rm->peer_ref = alloc_ref(item->string);
657 hashcpy(rm->old_sha1, item->util);
658 **tail = rm;
659 *tail = &rm->next;
660 }
661 }
662 string_list_clear(&remote_refs, 0);
664}
665static void check_not_current_branch(struct ref *ref_map)
667{
668 struct branch *current_branch = branch_get(NULL);
669 if (is_bare_repository() || !current_branch)
671 return;
672 for (; ref_map; ref_map = ref_map->next)
674 if (ref_map->peer_ref && !strcmp(current_branch->refname,
675 ref_map->peer_ref->name))
676 die(_("Refusing to fetch into current branch %s "
677 "of non-bare repository"), current_branch->refname);
678}
679static int truncate_fetch_head(void)
681{
682 char *filename = git_path("FETCH_HEAD");
683 FILE *fp = fopen(filename, "w");
684 if (!fp)
686 return error(_("cannot open %s: %s\n"), filename, strerror(errno));
687 fclose(fp);
688 return 0;
689}
690static int do_fetch(struct transport *transport,
692 struct refspec *refs, int ref_count)
693{
694 struct string_list existing_refs = STRING_LIST_INIT_NODUP;
695 struct string_list_item *peer_item = NULL;
696 struct ref *ref_map;
697 struct ref *rm;
698 int autotags = (transport->remote->fetch_tags == 1);
699 for_each_ref(add_existing, &existing_refs);
701 if (tags == TAGS_DEFAULT) {
703 if (transport->remote->fetch_tags == 2)
704 tags = TAGS_SET;
705 if (transport->remote->fetch_tags == -1)
706 tags = TAGS_UNSET;
707 }
708 if (!transport->get_refs_list || !transport->fetch)
710 die(_("Don't know how to fetch from %s"), transport->url);
711 /* if not appending, truncate FETCH_HEAD */
713 if (!append && !dry_run) {
714 int errcode = truncate_fetch_head();
715 if (errcode)
716 return errcode;
717 }
718 ref_map = get_ref_map(transport, refs, ref_count, tags, &autotags);
720 if (!update_head_ok)
721 check_not_current_branch(ref_map);
722 for (rm = ref_map; rm; rm = rm->next) {
724 if (rm->peer_ref) {
725 peer_item = string_list_lookup(&existing_refs,
726 rm->peer_ref->name);
727 if (peer_item)
728 hashcpy(rm->peer_ref->old_sha1,
729 peer_item->util);
730 }
731 }
732 if (tags == TAGS_DEFAULT && autotags)
734 transport_set_option(transport, TRANS_OPT_FOLLOWTAGS, "1");
735 if (fetch_refs(transport, ref_map)) {
736 free_refs(ref_map);
737 return 1;
738 }
739 if (prune) {
740 /* If --tags was specified, pretend the user gave us the canonical tags refspec */
741 if (tags == TAGS_SET) {
742 const char *tags_str = "refs/tags/*:refs/tags/*";
743 struct refspec *tags_refspec, *refspec;
744 /* Copy the refspec and add the tags to it */
746 refspec = xcalloc(ref_count + 1, sizeof(struct refspec));
747 tags_refspec = parse_fetch_refspec(1, &tags_str);
748 memcpy(refspec, refs, ref_count * sizeof(struct refspec));
749 memcpy(&refspec[ref_count], tags_refspec, sizeof(struct refspec));
750 ref_count++;
751 prune_refs(refspec, ref_count, ref_map);
753 ref_count--;
755 /* The rest of the strings belong to fetch_one */
756 free_refspec(1, tags_refspec);
757 free(refspec);
758 } else if (ref_count) {
759 prune_refs(refs, ref_count, ref_map);
760 } else {
761 prune_refs(transport->remote->fetch, transport->remote->fetch_refspec_nr, ref_map);
762 }
763 }
764 free_refs(ref_map);
765 /* if neither --no-tags nor --tags was specified, do automated tag
767 * following ... */
768 if (tags == TAGS_DEFAULT && autotags) {
769 struct ref **tail = &ref_map;
770 ref_map = NULL;
771 find_non_local_tags(transport, &ref_map, &tail);
772 if (ref_map) {
773 transport_set_option(transport, TRANS_OPT_FOLLOWTAGS, NULL);
774 transport_set_option(transport, TRANS_OPT_DEPTH, "0");
775 fetch_refs(transport, ref_map);
776 }
777 free_refs(ref_map);
778 }
779 return 0;
781}
782static void set_option(const char *name, const char *value)
784{
785 int r = transport_set_option(transport, name, value);
786 if (r < 0)
787 die(_("Option \"%s\" value \"%s\" is not valid for %s"),
788 name, value, transport->url);
789 if (r > 0)
790 warning(_("Option \"%s\" is ignored for %s\n"),
791 name, transport->url);
792}
793static int get_one_remote_for_fetch(struct remote *remote, void *priv)
795{
796 struct string_list *list = priv;
797 if (!remote->skip_default_update)
798 string_list_append(list, remote->name);
799 return 0;
800}
801struct remote_group_data {
803 const char *name;
804 struct string_list *list;
805};
806static int get_remote_group(const char *key, const char *value, void *priv)
808{
809 struct remote_group_data *g = priv;
810 if (!prefixcmp(key, "remotes.") &&
812 !strcmp(key + 8, g->name)) {
813 /* split list by white space */
814 int space = strcspn(value, " \t\n");
815 while (*value) {
816 if (space > 1) {
817 string_list_append(g->list,
818 xstrndup(value, space));
819 }
820 value += space + (value[space] != '\0');
821 space = strcspn(value, " \t\n");
822 }
823 }
824 return 0;
826}
827static int add_remote_or_group(const char *name, struct string_list *list)
829{
830 int prev_nr = list->nr;
831 struct remote_group_data g;
832 g.name = name; g.list = list;
833 git_config(get_remote_group, &g);
835 if (list->nr == prev_nr) {
836 struct remote *remote;
837 if (!remote_is_configured(name))
838 return 0;
839 remote = remote_get(name);
840 string_list_append(list, remote->name);
841 }
842 return 1;
843}
844static void add_options_to_argv(struct argv_array *argv)
846{
847 if (dry_run)
848 argv_array_push(argv, "--dry-run");
849 if (prune)
850 argv_array_push(argv, "--prune");
851 if (update_head_ok)
852 argv_array_push(argv, "--update-head-ok");
853 if (force)
854 argv_array_push(argv, "--force");
855 if (keep)
856 argv_array_push(argv, "--keep");
857 if (recurse_submodules == RECURSE_SUBMODULES_ON)
858 argv_array_push(argv, "--recurse-submodules");
859 else if (recurse_submodules == RECURSE_SUBMODULES_ON_DEMAND)
860 argv_array_push(argv, "--recurse-submodules=on-demand");
861 if (verbosity >= 2)
862 argv_array_push(argv, "-v");
863 if (verbosity >= 1)
864 argv_array_push(argv, "-v");
865 else if (verbosity < 0)
866 argv_array_push(argv, "-q");
867}
869static int fetch_multiple(struct string_list *list)
871{
872 int i, result = 0;
873 struct argv_array argv = ARGV_ARRAY_INIT;
874 if (!append && !dry_run) {
876 int errcode = truncate_fetch_head();
877 if (errcode)
878 return errcode;
879 }
880 argv_array_pushl(&argv, "fetch", "--append", NULL);
882 add_options_to_argv(&argv);
883 for (i = 0; i < list->nr; i++) {
885 const char *name = list->items[i].string;
886 argv_array_push(&argv, name);
887 if (verbosity >= 0)
888 printf(_("Fetching %s\n"), name);
889 if (run_command_v_opt(argv.argv, RUN_GIT_CMD)) {
890 error(_("Could not fetch %s"), name);
891 result = 1;
892 }
893 argv_array_pop(&argv);
894 }
895 argv_array_clear(&argv);
897 return result;
898}
899static int fetch_one(struct remote *remote, int argc, const char **argv)
901{
902 int i;
903 static const char **refs = NULL;
904 struct refspec *refspec;
905 int ref_nr = 0;
906 int exit_code;
907 if (!remote)
909 die(_("No remote repository specified. Please, specify either a URL or a\n"
910 "remote name from which new revisions should be fetched."));
911 transport = transport_get(remote, NULL);
913 transport_set_verbosity(transport, verbosity, progress);
914 if (upload_pack)
915 set_option(TRANS_OPT_UPLOADPACK, upload_pack);
916 if (keep)
917 set_option(TRANS_OPT_KEEP, "yes");
918 if (depth)
919 set_option(TRANS_OPT_DEPTH, depth);
920 if (argc > 0) {
922 int j = 0;
923 refs = xcalloc(argc + 1, sizeof(const char *));
924 for (i = 0; i < argc; i++) {
925 if (!strcmp(argv[i], "tag")) {
926 char *ref;
927 i++;
928 if (i >= argc)
929 die(_("You need to specify a tag name."));
930 ref = xmalloc(strlen(argv[i]) * 2 + 22);
931 strcpy(ref, "refs/tags/");
932 strcat(ref, argv[i]);
933 strcat(ref, ":refs/tags/");
934 strcat(ref, argv[i]);
935 refs[j++] = ref;
936 } else
937 refs[j++] = argv[i];
938 }
939 refs[j] = NULL;
940 ref_nr = j;
941 }
942 sigchain_push_common(unlock_pack_on_signal);
944 atexit(unlock_pack);
945 refspec = parse_fetch_refspec(ref_nr, refs);
946 exit_code = do_fetch(transport, refspec, ref_nr);
947 free_refspec(ref_nr, refspec);
948 transport_disconnect(transport);
949 transport = NULL;
950 return exit_code;
951}
952int cmd_fetch(int argc, const char **argv, const char *prefix)
954{
955 int i;
956 struct string_list list = STRING_LIST_INIT_NODUP;
957 struct remote *remote;
958 int result = 0;
959 packet_trace_identity("fetch");
961 /* Record the command line for the reflog */
963 strbuf_addstr(&default_rla, "fetch");
964 for (i = 1; i < argc; i++)
965 strbuf_addf(&default_rla, " %s", argv[i]);
966 argc = parse_options(argc, argv, prefix,
968 builtin_fetch_options, builtin_fetch_usage, 0);
969 if (recurse_submodules != RECURSE_SUBMODULES_OFF) {
971 if (recurse_submodules_default) {
972 int arg = parse_fetch_recurse_submodules_arg("--recurse-submodules-default", recurse_submodules_default);
973 set_config_fetch_recurse_submodules(arg);
974 }
975 gitmodules_config();
976 git_config(submodule_config, NULL);
977 }
978 if (all) {
980 if (argc == 1)
981 die(_("fetch --all does not take a repository argument"));
982 else if (argc > 1)
983 die(_("fetch --all does not make sense with refspecs"));
984 (void) for_each_remote(get_one_remote_for_fetch, &list);
985 result = fetch_multiple(&list);
986 } else if (argc == 0) {
987 /* No arguments -- use default remote */
988 remote = remote_get(NULL);
989 result = fetch_one(remote, argc, argv);
990 } else if (multiple) {
991 /* All arguments are assumed to be remotes or groups */
992 for (i = 0; i < argc; i++)
993 if (!add_remote_or_group(argv[i], &list))
994 die(_("No such remote or remote group: %s"), argv[i]);
995 result = fetch_multiple(&list);
996 } else {
997 /* Single remote or group */
998 (void) add_remote_or_group(argv[0], &list);
999 if (list.nr > 1) {
1000 /* More than one remote */
1001 if (argc > 1)
1002 die(_("Fetching a group and specifying refspecs does not make sense"));
1003 result = fetch_multiple(&list);
1004 } else {
1005 /* Zero or one remotes */
1006 remote = remote_get(argv[0]);
1007 result = fetch_one(remote, argc-1, argv+1);
1008 }
1009 }
1010 if (!result && (recurse_submodules != RECURSE_SUBMODULES_OFF)) {
1012 struct argv_array options = ARGV_ARRAY_INIT;
1013 add_options_to_argv(&options);
1015 result = fetch_populated_submodules(&options,
1016 submodule_prefix,
1017 recurse_submodules,
1018 verbosity < 0);
1019 argv_array_clear(&options);
1020 }
1021 /* All names were strdup()ed or strndup()ed */
1023 list.strdup_strings = 1;
1024 string_list_clear(&list, 0);
1025 return result;
1027}