1#include "cache.h"
2#include "remote.h"
3#include "refs.h"
4static struct remote **remotes;
6static int allocated_remotes;
7static struct branch **branches;
9static int allocated_branches;
10static struct branch *current_branch;
12static const char *default_remote_name;
13#define BUF_SIZE (2048)
15static char buffer[BUF_SIZE];
16static void add_push_refspec(struct remote *remote, const char *ref)
18{
19 int nr = remote->push_refspec_nr + 1;
20 remote->push_refspec =
21 xrealloc(remote->push_refspec, nr * sizeof(char *));
22 remote->push_refspec[nr-1] = ref;
23 remote->push_refspec_nr = nr;
24}
25static void add_fetch_refspec(struct remote *remote, const char *ref)
27{
28 int nr = remote->fetch_refspec_nr + 1;
29 remote->fetch_refspec =
30 xrealloc(remote->fetch_refspec, nr * sizeof(char *));
31 remote->fetch_refspec[nr-1] = ref;
32 remote->fetch_refspec_nr = nr;
33}
34static void add_url(struct remote *remote, const char *url)
36{
37 int nr = remote->url_nr + 1;
38 remote->url =
39 xrealloc(remote->url, nr * sizeof(char *));
40 remote->url[nr-1] = url;
41 remote->url_nr = nr;
42}
43static struct remote *make_remote(const char *name, int len)
45{
46 int i, empty = -1;
47 for (i = 0; i < allocated_remotes; i++) {
49 if (!remotes[i]) {
50 if (empty < 0)
51 empty = i;
52 } else {
53 if (len ? (!strncmp(name, remotes[i]->name, len) &&
54 !remotes[i]->name[len]) :
55 !strcmp(name, remotes[i]->name))
56 return remotes[i];
57 }
58 }
59 if (empty < 0) {
61 empty = allocated_remotes;
62 allocated_remotes += allocated_remotes ? allocated_remotes : 1;
63 remotes = xrealloc(remotes,
64 sizeof(*remotes) * allocated_remotes);
65 memset(remotes + empty, 0,
66 (allocated_remotes - empty) * sizeof(*remotes));
67 }
68 remotes[empty] = xcalloc(1, sizeof(struct remote));
69 if (len)
70 remotes[empty]->name = xstrndup(name, len);
71 else
72 remotes[empty]->name = xstrdup(name);
73 return remotes[empty];
74}
75static void add_merge(struct branch *branch, const char *name)
77{
78 int nr = branch->merge_nr + 1;
79 branch->merge_name =
80 xrealloc(branch->merge_name, nr * sizeof(char *));
81 branch->merge_name[nr-1] = name;
82 branch->merge_nr = nr;
83}
84static struct branch *make_branch(const char *name, int len)
86{
87 int i, empty = -1;
88 char *refname;
89 for (i = 0; i < allocated_branches; i++) {
91 if (!branches[i]) {
92 if (empty < 0)
93 empty = i;
94 } else {
95 if (len ? (!strncmp(name, branches[i]->name, len) &&
96 !branches[i]->name[len]) :
97 !strcmp(name, branches[i]->name))
98 return branches[i];
99 }
100 }
101 if (empty < 0) {
103 empty = allocated_branches;
104 allocated_branches += allocated_branches ? allocated_branches : 1;
105 branches = xrealloc(branches,
106 sizeof(*branches) * allocated_branches);
107 memset(branches + empty, 0,
108 (allocated_branches - empty) * sizeof(*branches));
109 }
110 branches[empty] = xcalloc(1, sizeof(struct branch));
111 if (len)
112 branches[empty]->name = xstrndup(name, len);
113 else
114 branches[empty]->name = xstrdup(name);
115 refname = malloc(strlen(name) + strlen("refs/heads/") + 1);
116 strcpy(refname, "refs/heads/");
117 strcpy(refname + strlen("refs/heads/"),
118 branches[empty]->name);
119 branches[empty]->refname = refname;
120 return branches[empty];
122}
123static void read_remotes_file(struct remote *remote)
125{
126 FILE *f = fopen(git_path("remotes/%s", remote->name), "r");
127 if (!f)
129 return;
130 while (fgets(buffer, BUF_SIZE, f)) {
131 int value_list;
132 char *s, *p;
133 if (!prefixcmp(buffer, "URL:")) {
135 value_list = 0;
136 s = buffer + 4;
137 } else if (!prefixcmp(buffer, "Push:")) {
138 value_list = 1;
139 s = buffer + 5;
140 } else if (!prefixcmp(buffer, "Pull:")) {
141 value_list = 2;
142 s = buffer + 5;
143 } else
144 continue;
145 while (isspace(*s))
147 s++;
148 if (!*s)
149 continue;
150 p = s + strlen(s);
152 while (isspace(p[-1]))
153 *--p = 0;
154 switch (value_list) {
156 case 0:
157 add_url(remote, xstrdup(s));
158 break;
159 case 1:
160 add_push_refspec(remote, xstrdup(s));
161 break;
162 case 2:
163 add_fetch_refspec(remote, xstrdup(s));
164 break;
165 }
166 }
167 fclose(f);
168}
169static void read_branches_file(struct remote *remote)
171{
172 const char *slash = strchr(remote->name, '/');
173 char *frag;
174 char *branch;
175 int n = slash ? slash - remote->name : 1000;
176 FILE *f = fopen(git_path("branches/%.*s", n, remote->name), "r");
177 char *s, *p;
178 int len;
179 if (!f)
181 return;
182 s = fgets(buffer, BUF_SIZE, f);
183 fclose(f);
184 if (!s)
185 return;
186 while (isspace(*s))
187 s++;
188 if (!*s)
189 return;
190 p = s + strlen(s);
191 while (isspace(p[-1]))
192 *--p = 0;
193 len = p - s;
194 if (slash)
195 len += strlen(slash);
196 p = xmalloc(len + 1);
197 strcpy(p, s);
198 if (slash)
199 strcat(p, slash);
200 frag = strchr(p, '#');
201 if (frag) {
202 *(frag++) = '\0';
203 branch = xmalloc(strlen(frag) + 12);
204 strcpy(branch, "refs/heads/");
205 strcat(branch, frag);
206 } else {
207 branch = "refs/heads/master";
208 }
209 add_url(remote, p);
210 add_fetch_refspec(remote, branch);
211 remote->fetch_tags = 1; /* always auto-follow */
212}
213static int handle_config(const char *key, const char *value)
215{
216 const char *name;
217 const char *subkey;
218 struct remote *remote;
219 struct branch *branch;
220 if (!prefixcmp(key, "branch.")) {
221 name = key + 7;
222 subkey = strrchr(name, '.');
223 branch = make_branch(name, subkey - name);
224 if (!subkey)
225 return 0;
226 if (!value)
227 return 0;
228 if (!strcmp(subkey, ".remote")) {
229 branch->remote_name = xstrdup(value);
230 if (branch == current_branch)
231 default_remote_name = branch->remote_name;
232 } else if (!strcmp(subkey, ".merge"))
233 add_merge(branch, xstrdup(value));
234 return 0;
235 }
236 if (prefixcmp(key, "remote."))
237 return 0;
238 name = key + 7;
239 subkey = strrchr(name, '.');
240 if (!subkey)
241 return error("Config with no key for remote %s", name);
242 if (*subkey == '/') {
243 warning("Config remote shorthand cannot begin with '/': %s", name);
244 return 0;
245 }
246 remote = make_remote(name, subkey - name);
247 if (!value) {
248 /* if we ever have a boolean variable, e.g. "remote.*.disabled"
249 * [remote "frotz"]
250 * disabled
251 * is a valid way to set it to true; we get NULL in value so
252 * we need to handle it here.
253 *
254 * if (!strcmp(subkey, ".disabled")) {
255 * val = git_config_bool(key, value);
256 * return 0;
257 * } else
258 *
259 */
260 return 0; /* ignore unknown booleans */
261 }
262 if (!strcmp(subkey, ".url")) {
263 add_url(remote, xstrdup(value));
264 } else if (!strcmp(subkey, ".push")) {
265 add_push_refspec(remote, xstrdup(value));
266 } else if (!strcmp(subkey, ".fetch")) {
267 add_fetch_refspec(remote, xstrdup(value));
268 } else if (!strcmp(subkey, ".receivepack")) {
269 if (!remote->receivepack)
270 remote->receivepack = xstrdup(value);
271 else
272 error("more than one receivepack given, using the first");
273 } else if (!strcmp(subkey, ".uploadpack")) {
274 if (!remote->uploadpack)
275 remote->uploadpack = xstrdup(value);
276 else
277 error("more than one uploadpack given, using the first");
278 } else if (!strcmp(subkey, ".tagopt")) {
279 if (!strcmp(value, "--no-tags"))
280 remote->fetch_tags = -1;
281 } else if (!strcmp(subkey, ".proxy")) {
282 remote->http_proxy = xstrdup(value);
283 }
284 return 0;
285}
286static void read_config(void)
288{
289 unsigned char sha1[20];
290 const char *head_ref;
291 int flag;
292 if (default_remote_name) // did this already
293 return;
294 default_remote_name = xstrdup("origin");
295 current_branch = NULL;
296 head_ref = resolve_ref("HEAD", sha1, 0, &flag);
297 if (head_ref && (flag & REF_ISSYMREF) &&
298 !prefixcmp(head_ref, "refs/heads/")) {
299 current_branch =
300 make_branch(head_ref + strlen("refs/heads/"), 0);
301 }
302 git_config(handle_config);
303}
304struct refspec *parse_ref_spec(int nr_refspec, const char **refspec)
306{
307 int i;
308 struct refspec *rs = xcalloc(sizeof(*rs), nr_refspec);
309 for (i = 0; i < nr_refspec; i++) {
310 const char *sp, *ep, *gp;
311 sp = refspec[i];
312 if (*sp == '+') {
313 rs[i].force = 1;
314 sp++;
315 }
316 gp = strchr(sp, '*');
317 ep = strchr(sp, ':');
318 if (gp && ep && gp > ep)
319 gp = NULL;
320 if (ep) {
321 if (ep[1]) {
322 const char *glob = strchr(ep + 1, '*');
323 if (!glob)
324 gp = NULL;
325 if (gp)
326 rs[i].dst = xstrndup(ep + 1,
327 glob - ep - 1);
328 else
329 rs[i].dst = xstrdup(ep + 1);
330 }
331 } else {
332 ep = sp + strlen(sp);
333 }
334 if (gp) {
335 rs[i].pattern = 1;
336 ep = gp;
337 }
338 rs[i].src = xstrndup(sp, ep - sp);
339 }
340 return rs;
341}
342struct remote *remote_get(const char *name)
344{
345 struct remote *ret;
346 read_config();
348 if (!name)
349 name = default_remote_name;
350 ret = make_remote(name, 0);
351 if (name[0] != '/') {
352 if (!ret->url)
353 read_remotes_file(ret);
354 if (!ret->url)
355 read_branches_file(ret);
356 }
357 if (!ret->url)
358 add_url(ret, name);
359 if (!ret->url)
360 return NULL;
361 ret->fetch = parse_ref_spec(ret->fetch_refspec_nr, ret->fetch_refspec);
362 ret->push = parse_ref_spec(ret->push_refspec_nr, ret->push_refspec);
363 return ret;
364}
365int for_each_remote(each_remote_fn fn, void *priv)
367{
368 int i, result = 0;
369 read_config();
370 for (i = 0; i < allocated_remotes && !result; i++) {
371 struct remote *r = remotes[i];
372 if (!r)
373 continue;
374 if (!r->fetch)
375 r->fetch = parse_ref_spec(r->fetch_refspec_nr,
376 r->fetch_refspec);
377 if (!r->push)
378 r->push = parse_ref_spec(r->push_refspec_nr,
379 r->push_refspec);
380 result = fn(r, priv);
381 }
382 return result;
383}
384void ref_remove_duplicates(struct ref *ref_map)
386{
387 struct ref **posn;
388 struct ref *next;
389 for (; ref_map; ref_map = ref_map->next) {
390 if (!ref_map->peer_ref)
391 continue;
392 posn = &ref_map->next;
393 while (*posn) {
394 if ((*posn)->peer_ref &&
395 !strcmp((*posn)->peer_ref->name,
396 ref_map->peer_ref->name)) {
397 if (strcmp((*posn)->name, ref_map->name))
398 die("%s tracks both %s and %s",
399 ref_map->peer_ref->name,
400 (*posn)->name, ref_map->name);
401 next = (*posn)->next;
402 free((*posn)->peer_ref);
403 free(*posn);
404 *posn = next;
405 } else {
406 posn = &(*posn)->next;
407 }
408 }
409 }
410}
411int remote_has_url(struct remote *remote, const char *url)
413{
414 int i;
415 for (i = 0; i < remote->url_nr; i++) {
416 if (!strcmp(remote->url[i], url))
417 return 1;
418 }
419 return 0;
420}
421int remote_find_tracking(struct remote *remote, struct refspec *refspec)
423{
424 int find_src = refspec->src == NULL;
425 char *needle, **result;
426 int i;
427 if (find_src) {
429 if (!refspec->dst)
430 return error("find_tracking: need either src or dst");
431 needle = refspec->dst;
432 result = &refspec->src;
433 } else {
434 needle = refspec->src;
435 result = &refspec->dst;
436 }
437 for (i = 0; i < remote->fetch_refspec_nr; i++) {
439 struct refspec *fetch = &remote->fetch[i];
440 const char *key = find_src ? fetch->dst : fetch->src;
441 const char *value = find_src ? fetch->src : fetch->dst;
442 if (!fetch->dst)
443 continue;
444 if (fetch->pattern) {
445 if (!prefixcmp(needle, key)) {
446 *result = xmalloc(strlen(value) +
447 strlen(needle) -
448 strlen(key) + 1);
449 strcpy(*result, value);
450 strcpy(*result + strlen(value),
451 needle + strlen(key));
452 refspec->force = fetch->force;
453 return 0;
454 }
455 } else if (!strcmp(needle, key)) {
456 *result = xstrdup(value);
457 refspec->force = fetch->force;
458 return 0;
459 }
460 }
461 return -1;
462}
463struct ref *alloc_ref(unsigned namelen)
465{
466 struct ref *ret = xmalloc(sizeof(struct ref) + namelen);
467 memset(ret, 0, sizeof(struct ref) + namelen);
468 return ret;
469}
470static struct ref *copy_ref(const struct ref *ref)
472{
473 struct ref *ret = xmalloc(sizeof(struct ref) + strlen(ref->name) + 1);
474 memcpy(ret, ref, sizeof(struct ref) + strlen(ref->name) + 1);
475 ret->next = NULL;
476 return ret;
477}
478struct ref *copy_ref_list(const struct ref *ref)
480{
481 struct ref *ret = NULL;
482 struct ref **tail = &ret;
483 while (ref) {
484 *tail = copy_ref(ref);
485 ref = ref->next;
486 tail = &((*tail)->next);
487 }
488 return ret;
489}
490void free_refs(struct ref *ref)
492{
493 struct ref *next;
494 while (ref) {
495 next = ref->next;
496 if (ref->peer_ref)
497 free(ref->peer_ref);
498 free(ref);
499 ref = next;
500 }
501}
502static int count_refspec_match(const char *pattern,
504 struct ref *refs,
505 struct ref **matched_ref)
506{
507 int patlen = strlen(pattern);
508 struct ref *matched_weak = NULL;
509 struct ref *matched = NULL;
510 int weak_match = 0;
511 int match = 0;
512 for (weak_match = match = 0; refs; refs = refs->next) {
514 char *name = refs->name;
515 int namelen = strlen(name);
516 if (!refname_match(pattern, name, ref_rev_parse_rules))
518 continue;
519 /* A match is "weak" if it is with refs outside
521 * heads or tags, and did not specify the pattern
522 * in full (e.g. "refs/remotes/origin/master") or at
523 * least from the toplevel (e.g. "remotes/origin/master");
524 * otherwise "git push $URL master" would result in
525 * ambiguity between remotes/origin/master and heads/master
526 * at the remote site.
527 */
528 if (namelen != patlen &&
529 patlen != namelen - 5 &&
530 prefixcmp(name, "refs/heads/") &&
531 prefixcmp(name, "refs/tags/")) {
532 /* We want to catch the case where only weak
533 * matches are found and there are multiple
534 * matches, and where more than one strong
535 * matches are found, as ambiguous. One
536 * strong match with zero or more weak matches
537 * are acceptable as a unique match.
538 */
539 matched_weak = refs;
540 weak_match++;
541 }
542 else {
543 matched = refs;
544 match++;
545 }
546 }
547 if (!matched) {
548 *matched_ref = matched_weak;
549 return weak_match;
550 }
551 else {
552 *matched_ref = matched;
553 return match;
554 }
555}
556static void tail_link_ref(struct ref *ref, struct ref ***tail)
558{
559 **tail = ref;
560 while (ref->next)
561 ref = ref->next;
562 *tail = &ref->next;
563}
564static struct ref *try_explicit_object_name(const char *name)
566{
567 unsigned char sha1[20];
568 struct ref *ref;
569 int len;
570 if (!*name) {
572 ref = alloc_ref(20);
573 strcpy(ref->name, "(delete)");
574 hashclr(ref->new_sha1);
575 return ref;
576 }
577 if (get_sha1(name, sha1))
578 return NULL;
579 len = strlen(name) + 1;
580 ref = alloc_ref(len);
581 memcpy(ref->name, name, len);
582 hashcpy(ref->new_sha1, sha1);
583 return ref;
584}
585static struct ref *make_linked_ref(const char *name, struct ref ***tail)
587{
588 struct ref *ret;
589 size_t len;
590 len = strlen(name) + 1;
592 ret = alloc_ref(len);
593 memcpy(ret->name, name, len);
594 tail_link_ref(ret, tail);
595 return ret;
596}
597static int match_explicit(struct ref *src, struct ref *dst,
599 struct ref ***dst_tail,
600 struct refspec *rs,
601 int errs)
602{
603 struct ref *matched_src, *matched_dst;
604 const char *dst_value = rs->dst;
606 if (rs->pattern)
608 return errs;
609 matched_src = matched_dst = NULL;
611 switch (count_refspec_match(rs->src, src, &matched_src)) {
612 case 1:
613 break;
614 case 0:
615 /* The source could be in the get_sha1() format
616 * not a reference name. :refs/other is a
617 * way to delete 'other' ref at the remote end.
618 */
619 matched_src = try_explicit_object_name(rs->src);
620 if (!matched_src)
621 error("src refspec %s does not match any.", rs->src);
622 break;
623 default:
624 matched_src = NULL;
625 error("src refspec %s matches more than one.", rs->src);
626 break;
627 }
628 if (!matched_src)
630 errs = 1;
631 if (!dst_value) {
633 if (!matched_src)
634 return errs;
635 dst_value = matched_src->name;
636 }
637 switch (count_refspec_match(dst_value, dst, &matched_dst)) {
639 case 1:
640 break;
641 case 0:
642 if (!memcmp(dst_value, "refs/", 5))
643 matched_dst = make_linked_ref(dst_value, dst_tail);
644 else
645 error("dst refspec %s does not match any "
646 "existing ref on the remote and does "
647 "not start with refs/.", dst_value);
648 break;
649 default:
650 matched_dst = NULL;
651 error("dst refspec %s matches more than one.",
652 dst_value);
653 break;
654 }
655 if (errs || !matched_dst)
656 return 1;
657 if (matched_dst->peer_ref) {
658 errs = 1;
659 error("dst ref %s receives from more than one src.",
660 matched_dst->name);
661 }
662 else {
663 matched_dst->peer_ref = matched_src;
664 matched_dst->force = rs->force;
665 }
666 return errs;
667}
668static int match_explicit_refs(struct ref *src, struct ref *dst,
670 struct ref ***dst_tail, struct refspec *rs,
671 int rs_nr)
672{
673 int i, errs;
674 for (i = errs = 0; i < rs_nr; i++)
675 errs |= match_explicit(src, dst, dst_tail, &rs[i], errs);
676 return -errs;
677}
678static const struct refspec *check_pattern_match(const struct refspec *rs,
680 int rs_nr,
681 const struct ref *src)
682{
683 int i;
684 for (i = 0; i < rs_nr; i++) {
685 if (rs[i].pattern && !prefixcmp(src->name, rs[i].src))
686 return rs + i;
687 }
688 return NULL;
689}
690/*
692 * Note. This is used only by "push"; refspec matching rules for
693 * push and fetch are subtly different, so do not try to reuse it
694 * without thinking.
695 */
696int match_refs(struct ref *src, struct ref *dst, struct ref ***dst_tail,
697 int nr_refspec, const char **refspec, int flags)
698{
699 struct refspec *rs =
700 parse_ref_spec(nr_refspec, (const char **) refspec);
701 int send_all = flags & MATCH_REFS_ALL;
702 int send_mirror = flags & MATCH_REFS_MIRROR;
703 if (match_explicit_refs(src, dst, dst_tail, rs, nr_refspec))
705 return -1;
706 /* pick the remainder */
708 for ( ; src; src = src->next) {
709 struct ref *dst_peer;
710 const struct refspec *pat = NULL;
711 char *dst_name;
712 if (src->peer_ref)
713 continue;
714 if (nr_refspec) {
715 pat = check_pattern_match(rs, nr_refspec, src);
716 if (!pat)
717 continue;
718 }
719 else if (!send_mirror && prefixcmp(src->name, "refs/heads/"))
720 /*
721 * "matching refs"; traditionally we pushed everything
722 * including refs outside refs/heads/ hierarchy, but
723 * that does not make much sense these days.
724 */
725 continue;
726 if (pat) {
728 const char *dst_side = pat->dst ? pat->dst : pat->src;
729 dst_name = xmalloc(strlen(dst_side) +
730 strlen(src->name) -
731 strlen(pat->src) + 2);
732 strcpy(dst_name, dst_side);
733 strcat(dst_name, src->name + strlen(pat->src));
734 } else
735 dst_name = xstrdup(src->name);
736 dst_peer = find_ref_by_name(dst, dst_name);
737 if (dst_peer && dst_peer->peer_ref)
738 /* We're already sending something to this ref. */
739 goto free_name;
740 if (!dst_peer && !nr_refspec && !(send_all || send_mirror))
742 /*
743 * Remote doesn't have it, and we have no
744 * explicit pattern, and we don't have
745 * --all nor --mirror.
746 */
747 goto free_name;
748 if (!dst_peer) {
749 /* Create a new one and link it */
750 dst_peer = make_linked_ref(dst_name, dst_tail);
751 hashcpy(dst_peer->new_sha1, src->new_sha1);
752 }
753 dst_peer->peer_ref = src;
754 if (pat)
755 dst_peer->force = pat->force;
756 free_name:
757 free(dst_name);
758 }
759 return 0;
760}
761struct branch *branch_get(const char *name)
763{
764 struct branch *ret;
765 read_config();
767 if (!name || !*name || !strcmp(name, "HEAD"))
768 ret = current_branch;
769 else
770 ret = make_branch(name, 0);
771 if (ret && ret->remote_name) {
772 ret->remote = remote_get(ret->remote_name);
773 if (ret->merge_nr) {
774 int i;
775 ret->merge = xcalloc(sizeof(*ret->merge),
776 ret->merge_nr);
777 for (i = 0; i < ret->merge_nr; i++) {
778 ret->merge[i] = xcalloc(1, sizeof(**ret->merge));
779 ret->merge[i]->src = xstrdup(ret->merge_name[i]);
780 remote_find_tracking(ret->remote,
781 ret->merge[i]);
782 }
783 }
784 }
785 return ret;
786}
787int branch_has_merge_config(struct branch *branch)
789{
790 return branch && !!branch->merge;
791}
792int branch_merge_matches(struct branch *branch,
794 int i,
795 const char *refname)
796{
797 if (!branch || i < 0 || i >= branch->merge_nr)
798 return 0;
799 return refname_match(branch->merge[i]->src, refname, ref_fetch_rules);
800}
801static struct ref *get_expanded_map(const struct ref *remote_refs,
803 const struct refspec *refspec)
804{
805 const struct ref *ref;
806 struct ref *ret = NULL;
807 struct ref **tail = &ret;
808 int remote_prefix_len = strlen(refspec->src);
810 int local_prefix_len = strlen(refspec->dst);
811 for (ref = remote_refs; ref; ref = ref->next) {
813 if (strchr(ref->name, '^'))
814 continue; /* a dereference item */
815 if (!prefixcmp(ref->name, refspec->src)) {
816 const char *match;
817 struct ref *cpy = copy_ref(ref);
818 match = ref->name + remote_prefix_len;
819 cpy->peer_ref = alloc_ref(local_prefix_len +
821 strlen(match) + 1);
822 sprintf(cpy->peer_ref->name, "%s%s",
823 refspec->dst, match);
824 if (refspec->force)
825 cpy->peer_ref->force = 1;
826 *tail = cpy;
827 tail = &cpy->next;
828 }
829 }
830 return ret;
832}
833static const struct ref *find_ref_by_name_abbrev(const struct ref *refs, const char *name)
835{
836 const struct ref *ref;
837 for (ref = refs; ref; ref = ref->next) {
838 if (refname_match(name, ref->name, ref_fetch_rules))
839 return ref;
840 }
841 return NULL;
842}
843struct ref *get_remote_ref(const struct ref *remote_refs, const char *name)
845{
846 const struct ref *ref = find_ref_by_name_abbrev(remote_refs, name);
847 if (!ref)
849 return NULL;
850 return copy_ref(ref);
852}
853static struct ref *get_local_ref(const char *name)
855{
856 struct ref *ret;
857 if (!name)
858 return NULL;
859 if (!prefixcmp(name, "refs/")) {
861 ret = alloc_ref(strlen(name) + 1);
862 strcpy(ret->name, name);
863 return ret;
864 }
865 if (!prefixcmp(name, "heads/") ||
867 !prefixcmp(name, "tags/") ||
868 !prefixcmp(name, "remotes/")) {
869 ret = alloc_ref(strlen(name) + 6);
870 sprintf(ret->name, "refs/%s", name);
871 return ret;
872 }
873 ret = alloc_ref(strlen(name) + 12);
875 sprintf(ret->name, "refs/heads/%s", name);
876 return ret;
877}
878int get_fetch_map(const struct ref *remote_refs,
880 const struct refspec *refspec,
881 struct ref ***tail,
882 int missing_ok)
883{
884 struct ref *ref_map, *rm;
885 if (refspec->pattern) {
887 ref_map = get_expanded_map(remote_refs, refspec);
888 } else {
889 const char *name = refspec->src[0] ? refspec->src : "HEAD";
890 ref_map = get_remote_ref(remote_refs, name);
892 if (!missing_ok && !ref_map)
893 die("Couldn't find remote ref %s", name);
894 if (ref_map) {
895 ref_map->peer_ref = get_local_ref(refspec->dst);
896 if (ref_map->peer_ref && refspec->force)
897 ref_map->peer_ref->force = 1;
898 }
899 }
900 for (rm = ref_map; rm; rm = rm->next) {
902 if (rm->peer_ref && check_ref_format(rm->peer_ref->name + 5))
903 die("* refusing to create funny ref '%s' locally",
904 rm->peer_ref->name);
905 }
906 if (ref_map)
908 tail_link_ref(ref_map, tail);
909 return 0;
911}