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 struct strbuf 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 /*
202 * With "slash", e.g. "git fetch jgarzik/netdev-2.6" when
203 * reading from $GIT_DIR/branches/jgarzik fetches "HEAD" from
204 * the partial URL obtained from the branches file plus
205 * "/netdev-2.6" and does not store it in any tracking ref.
206 * #branch specifier in the file is ignored.
207 *
208 * Otherwise, the branches file would have URL and optionally
209 * #branch specified. The "master" (or specified) branch is
210 * fetched and stored in the local branch of the same name.
211 */
212 strbuf_init(&branch, 0);
213 frag = strchr(p, '#');
214 if (frag) {
215 *(frag++) = '\0';
216 strbuf_addf(&branch, "refs/heads/%s", frag);
217 } else
218 strbuf_addstr(&branch, "refs/heads/master");
219 if (!slash) {
220 strbuf_addf(&branch, ":refs/heads/%s", remote->name);
221 } else {
222 strbuf_reset(&branch);
223 strbuf_addstr(&branch, "HEAD:");
224 }
225 add_url(remote, p);
226 add_fetch_refspec(remote, strbuf_detach(&branch, 0));
227 remote->fetch_tags = 1; /* always auto-follow */
228}
229static int handle_config(const char *key, const char *value)
231{
232 const char *name;
233 const char *subkey;
234 struct remote *remote;
235 struct branch *branch;
236 if (!prefixcmp(key, "branch.")) {
237 name = key + 7;
238 subkey = strrchr(name, '.');
239 if (!subkey)
240 return 0;
241 branch = make_branch(name, subkey - name);
242 if (!strcmp(subkey, ".remote")) {
243 if (!value)
244 return config_error_nonbool(key);
245 branch->remote_name = xstrdup(value);
246 if (branch == current_branch)
247 default_remote_name = branch->remote_name;
248 } else if (!strcmp(subkey, ".merge")) {
249 if (!value)
250 return config_error_nonbool(key);
251 add_merge(branch, xstrdup(value));
252 }
253 return 0;
254 }
255 if (prefixcmp(key, "remote."))
256 return 0;
257 name = key + 7;
258 subkey = strrchr(name, '.');
259 if (!subkey)
260 return error("Config with no key for remote %s", name);
261 if (*subkey == '/') {
262 warning("Config remote shorthand cannot begin with '/': %s", name);
263 return 0;
264 }
265 remote = make_remote(name, subkey - name);
266 if (!value) {
267 /* if we ever have a boolean variable, e.g. "remote.*.disabled"
268 * [remote "frotz"]
269 * disabled
270 * is a valid way to set it to true; we get NULL in value so
271 * we need to handle it here.
272 *
273 * if (!strcmp(subkey, ".disabled")) {
274 * val = git_config_bool(key, value);
275 * return 0;
276 * } else
277 *
278 */
279 return 0; /* ignore unknown booleans */
280 }
281 if (!strcmp(subkey, ".url")) {
282 add_url(remote, xstrdup(value));
283 } else if (!strcmp(subkey, ".push")) {
284 add_push_refspec(remote, xstrdup(value));
285 } else if (!strcmp(subkey, ".fetch")) {
286 add_fetch_refspec(remote, xstrdup(value));
287 } else if (!strcmp(subkey, ".receivepack")) {
288 if (!remote->receivepack)
289 remote->receivepack = xstrdup(value);
290 else
291 error("more than one receivepack given, using the first");
292 } else if (!strcmp(subkey, ".uploadpack")) {
293 if (!remote->uploadpack)
294 remote->uploadpack = xstrdup(value);
295 else
296 error("more than one uploadpack given, using the first");
297 } else if (!strcmp(subkey, ".tagopt")) {
298 if (!strcmp(value, "--no-tags"))
299 remote->fetch_tags = -1;
300 } else if (!strcmp(subkey, ".proxy")) {
301 remote->http_proxy = xstrdup(value);
302 }
303 return 0;
304}
305static void read_config(void)
307{
308 unsigned char sha1[20];
309 const char *head_ref;
310 int flag;
311 if (default_remote_name) // did this already
312 return;
313 default_remote_name = xstrdup("origin");
314 current_branch = NULL;
315 head_ref = resolve_ref("HEAD", sha1, 0, &flag);
316 if (head_ref && (flag & REF_ISSYMREF) &&
317 !prefixcmp(head_ref, "refs/heads/")) {
318 current_branch =
319 make_branch(head_ref + strlen("refs/heads/"), 0);
320 }
321 git_config(handle_config);
322}
323static struct refspec *parse_refspec_internal(int nr_refspec, const char **refspec, int fetch)
325{
326 int i;
327 int st;
328 struct refspec *rs = xcalloc(sizeof(*rs), nr_refspec);
329 for (i = 0; i < nr_refspec; i++) {
331 size_t llen, rlen;
332 int is_glob;
333 const char *lhs, *rhs;
334 llen = rlen = is_glob = 0;
336 lhs = refspec[i];
338 if (*lhs == '+') {
339 rs[i].force = 1;
340 lhs++;
341 }
342 rhs = strrchr(lhs, ':');
344 if (rhs) {
345 rhs++;
346 rlen = strlen(rhs);
347 is_glob = (2 <= rlen && !strcmp(rhs + rlen - 2, "/*"));
348 if (is_glob)
349 rlen -= 2;
350 rs[i].dst = xstrndup(rhs, rlen);
351 }
352 llen = (rhs ? (rhs - lhs - 1) : strlen(lhs));
354 if (2 <= llen && !memcmp(lhs + llen - 2, "/*", 2)) {
355 if ((rhs && !is_glob) || (!rhs && fetch))
356 goto invalid;
357 is_glob = 1;
358 llen -= 2;
359 } else if (rhs && is_glob) {
360 goto invalid;
361 }
362 rs[i].pattern = is_glob;
364 rs[i].src = xstrndup(lhs, llen);
365 if (fetch) {
367 /*
368 * LHS
369 * - empty is allowed; it means HEAD.
370 * - otherwise it must be a valid looking ref.
371 */
372 if (!*rs[i].src)
373 ; /* empty is ok */
374 else {
375 st = check_ref_format(rs[i].src);
376 if (st && st != CHECK_REF_FORMAT_ONELEVEL)
377 goto invalid;
378 }
379 /*
380 * RHS
381 * - missing is ok, and is same as empty.
382 * - empty is ok; it means not to store.
383 * - otherwise it must be a valid looking ref.
384 */
385 if (!rs[i].dst) {
386 ; /* ok */
387 } else if (!*rs[i].dst) {
388 ; /* ok */
389 } else {
390 st = check_ref_format(rs[i].dst);
391 if (st && st != CHECK_REF_FORMAT_ONELEVEL)
392 goto invalid;
393 }
394 } else {
395 /*
396 * LHS
397 * - empty is allowed; it means delete.
398 * - when wildcarded, it must be a valid looking ref.
399 * - otherwise, it must be an extended SHA-1, but
400 * there is no existing way to validate this.
401 */
402 if (!*rs[i].src)
403 ; /* empty is ok */
404 else if (is_glob) {
405 st = check_ref_format(rs[i].src);
406 if (st && st != CHECK_REF_FORMAT_ONELEVEL)
407 goto invalid;
408 }
409 else
410 ; /* anything goes, for now */
411 /*
412 * RHS
413 * - missing is allowed, but LHS then must be a
414 * valid looking ref.
415 * - empty is not allowed.
416 * - otherwise it must be a valid looking ref.
417 */
418 if (!rs[i].dst) {
419 st = check_ref_format(rs[i].src);
420 if (st && st != CHECK_REF_FORMAT_ONELEVEL)
421 goto invalid;
422 } else if (!*rs[i].dst) {
423 goto invalid;
424 } else {
425 st = check_ref_format(rs[i].dst);
426 if (st && st != CHECK_REF_FORMAT_ONELEVEL)
427 goto invalid;
428 }
429 }
430 }
431 return rs;
432 invalid:
434 die("Invalid refspec '%s'", refspec[i]);
435}
436struct refspec *parse_fetch_refspec(int nr_refspec, const char **refspec)
438{
439 return parse_refspec_internal(nr_refspec, refspec, 1);
440}
441struct refspec *parse_push_refspec(int nr_refspec, const char **refspec)
443{
444 return parse_refspec_internal(nr_refspec, refspec, 0);
445}
446static int valid_remote_nick(const char *name)
448{
449 if (!name[0] || /* not empty */
450 (name[0] == '.' && /* not "." */
451 (!name[1] || /* not ".." */
452 (name[1] == '.' && !name[2]))))
453 return 0;
454 return !strchr(name, '/'); /* no slash */
455}
456struct remote *remote_get(const char *name)
458{
459 struct remote *ret;
460 read_config();
462 if (!name)
463 name = default_remote_name;
464 ret = make_remote(name, 0);
465 if (valid_remote_nick(name)) {
466 if (!ret->url)
467 read_remotes_file(ret);
468 if (!ret->url)
469 read_branches_file(ret);
470 }
471 if (!ret->url)
472 add_url(ret, name);
473 if (!ret->url)
474 return NULL;
475 ret->fetch = parse_fetch_refspec(ret->fetch_refspec_nr, ret->fetch_refspec);
476 ret->push = parse_push_refspec(ret->push_refspec_nr, ret->push_refspec);
477 return ret;
478}
479int for_each_remote(each_remote_fn fn, void *priv)
481{
482 int i, result = 0;
483 read_config();
484 for (i = 0; i < allocated_remotes && !result; i++) {
485 struct remote *r = remotes[i];
486 if (!r)
487 continue;
488 if (!r->fetch)
489 r->fetch = parse_fetch_refspec(r->fetch_refspec_nr,
490 r->fetch_refspec);
491 if (!r->push)
492 r->push = parse_push_refspec(r->push_refspec_nr,
493 r->push_refspec);
494 result = fn(r, priv);
495 }
496 return result;
497}
498void ref_remove_duplicates(struct ref *ref_map)
500{
501 struct ref **posn;
502 struct ref *next;
503 for (; ref_map; ref_map = ref_map->next) {
504 if (!ref_map->peer_ref)
505 continue;
506 posn = &ref_map->next;
507 while (*posn) {
508 if ((*posn)->peer_ref &&
509 !strcmp((*posn)->peer_ref->name,
510 ref_map->peer_ref->name)) {
511 if (strcmp((*posn)->name, ref_map->name))
512 die("%s tracks both %s and %s",
513 ref_map->peer_ref->name,
514 (*posn)->name, ref_map->name);
515 next = (*posn)->next;
516 free((*posn)->peer_ref);
517 free(*posn);
518 *posn = next;
519 } else {
520 posn = &(*posn)->next;
521 }
522 }
523 }
524}
525int remote_has_url(struct remote *remote, const char *url)
527{
528 int i;
529 for (i = 0; i < remote->url_nr; i++) {
530 if (!strcmp(remote->url[i], url))
531 return 1;
532 }
533 return 0;
534}
535int remote_find_tracking(struct remote *remote, struct refspec *refspec)
537{
538 int find_src = refspec->src == NULL;
539 char *needle, **result;
540 int i;
541 if (find_src) {
543 if (!refspec->dst)
544 return error("find_tracking: need either src or dst");
545 needle = refspec->dst;
546 result = &refspec->src;
547 } else {
548 needle = refspec->src;
549 result = &refspec->dst;
550 }
551 for (i = 0; i < remote->fetch_refspec_nr; i++) {
553 struct refspec *fetch = &remote->fetch[i];
554 const char *key = find_src ? fetch->dst : fetch->src;
555 const char *value = find_src ? fetch->src : fetch->dst;
556 if (!fetch->dst)
557 continue;
558 if (fetch->pattern) {
559 if (!prefixcmp(needle, key) &&
560 needle[strlen(key)] == '/') {
561 *result = xmalloc(strlen(value) +
562 strlen(needle) -
563 strlen(key) + 1);
564 strcpy(*result, value);
565 strcpy(*result + strlen(value),
566 needle + strlen(key));
567 refspec->force = fetch->force;
568 return 0;
569 }
570 } else if (!strcmp(needle, key)) {
571 *result = xstrdup(value);
572 refspec->force = fetch->force;
573 return 0;
574 }
575 }
576 return -1;
577}
578struct ref *alloc_ref(unsigned namelen)
580{
581 struct ref *ret = xmalloc(sizeof(struct ref) + namelen);
582 memset(ret, 0, sizeof(struct ref) + namelen);
583 return ret;
584}
585static struct ref *copy_ref(const struct ref *ref)
587{
588 struct ref *ret = xmalloc(sizeof(struct ref) + strlen(ref->name) + 1);
589 memcpy(ret, ref, sizeof(struct ref) + strlen(ref->name) + 1);
590 ret->next = NULL;
591 return ret;
592}
593struct ref *copy_ref_list(const struct ref *ref)
595{
596 struct ref *ret = NULL;
597 struct ref **tail = &ret;
598 while (ref) {
599 *tail = copy_ref(ref);
600 ref = ref->next;
601 tail = &((*tail)->next);
602 }
603 return ret;
604}
605void free_refs(struct ref *ref)
607{
608 struct ref *next;
609 while (ref) {
610 next = ref->next;
611 if (ref->peer_ref)
612 free(ref->peer_ref);
613 free(ref);
614 ref = next;
615 }
616}
617static int count_refspec_match(const char *pattern,
619 struct ref *refs,
620 struct ref **matched_ref)
621{
622 int patlen = strlen(pattern);
623 struct ref *matched_weak = NULL;
624 struct ref *matched = NULL;
625 int weak_match = 0;
626 int match = 0;
627 for (weak_match = match = 0; refs; refs = refs->next) {
629 char *name = refs->name;
630 int namelen = strlen(name);
631 if (!refname_match(pattern, name, ref_rev_parse_rules))
633 continue;
634 /* A match is "weak" if it is with refs outside
636 * heads or tags, and did not specify the pattern
637 * in full (e.g. "refs/remotes/origin/master") or at
638 * least from the toplevel (e.g. "remotes/origin/master");
639 * otherwise "git push $URL master" would result in
640 * ambiguity between remotes/origin/master and heads/master
641 * at the remote site.
642 */
643 if (namelen != patlen &&
644 patlen != namelen - 5 &&
645 prefixcmp(name, "refs/heads/") &&
646 prefixcmp(name, "refs/tags/")) {
647 /* We want to catch the case where only weak
648 * matches are found and there are multiple
649 * matches, and where more than one strong
650 * matches are found, as ambiguous. One
651 * strong match with zero or more weak matches
652 * are acceptable as a unique match.
653 */
654 matched_weak = refs;
655 weak_match++;
656 }
657 else {
658 matched = refs;
659 match++;
660 }
661 }
662 if (!matched) {
663 *matched_ref = matched_weak;
664 return weak_match;
665 }
666 else {
667 *matched_ref = matched;
668 return match;
669 }
670}
671static void tail_link_ref(struct ref *ref, struct ref ***tail)
673{
674 **tail = ref;
675 while (ref->next)
676 ref = ref->next;
677 *tail = &ref->next;
678}
679static struct ref *try_explicit_object_name(const char *name)
681{
682 unsigned char sha1[20];
683 struct ref *ref;
684 int len;
685 if (!*name) {
687 ref = alloc_ref(20);
688 strcpy(ref->name, "(delete)");
689 hashclr(ref->new_sha1);
690 return ref;
691 }
692 if (get_sha1(name, sha1))
693 return NULL;
694 len = strlen(name) + 1;
695 ref = alloc_ref(len);
696 memcpy(ref->name, name, len);
697 hashcpy(ref->new_sha1, sha1);
698 return ref;
699}
700static struct ref *make_linked_ref(const char *name, struct ref ***tail)
702{
703 struct ref *ret;
704 size_t len;
705 len = strlen(name) + 1;
707 ret = alloc_ref(len);
708 memcpy(ret->name, name, len);
709 tail_link_ref(ret, tail);
710 return ret;
711}
712static int match_explicit(struct ref *src, struct ref *dst,
714 struct ref ***dst_tail,
715 struct refspec *rs,
716 int errs)
717{
718 struct ref *matched_src, *matched_dst;
719 const char *dst_value = rs->dst;
721 if (rs->pattern)
723 return errs;
724 matched_src = matched_dst = NULL;
726 switch (count_refspec_match(rs->src, src, &matched_src)) {
727 case 1:
728 break;
729 case 0:
730 /* The source could be in the get_sha1() format
731 * not a reference name. :refs/other is a
732 * way to delete 'other' ref at the remote end.
733 */
734 matched_src = try_explicit_object_name(rs->src);
735 if (!matched_src)
736 error("src refspec %s does not match any.", rs->src);
737 break;
738 default:
739 matched_src = NULL;
740 error("src refspec %s matches more than one.", rs->src);
741 break;
742 }
743 if (!matched_src)
745 errs = 1;
746 if (!dst_value) {
748 if (!matched_src)
749 return errs;
750 dst_value = matched_src->name;
751 }
752 switch (count_refspec_match(dst_value, dst, &matched_dst)) {
754 case 1:
755 break;
756 case 0:
757 if (!memcmp(dst_value, "refs/", 5))
758 matched_dst = make_linked_ref(dst_value, dst_tail);
759 else
760 error("dst refspec %s does not match any "
761 "existing ref on the remote and does "
762 "not start with refs/.", dst_value);
763 break;
764 default:
765 matched_dst = NULL;
766 error("dst refspec %s matches more than one.",
767 dst_value);
768 break;
769 }
770 if (errs || !matched_dst)
771 return 1;
772 if (matched_dst->peer_ref) {
773 errs = 1;
774 error("dst ref %s receives from more than one src.",
775 matched_dst->name);
776 }
777 else {
778 matched_dst->peer_ref = matched_src;
779 matched_dst->force = rs->force;
780 }
781 return errs;
782}
783static int match_explicit_refs(struct ref *src, struct ref *dst,
785 struct ref ***dst_tail, struct refspec *rs,
786 int rs_nr)
787{
788 int i, errs;
789 for (i = errs = 0; i < rs_nr; i++)
790 errs |= match_explicit(src, dst, dst_tail, &rs[i], errs);
791 return -errs;
792}
793static const struct refspec *check_pattern_match(const struct refspec *rs,
795 int rs_nr,
796 const struct ref *src)
797{
798 int i;
799 for (i = 0; i < rs_nr; i++) {
800 if (rs[i].pattern &&
801 !prefixcmp(src->name, rs[i].src) &&
802 src->name[strlen(rs[i].src)] == '/')
803 return rs + i;
804 }
805 return NULL;
806}
807/*
809 * Note. This is used only by "push"; refspec matching rules for
810 * push and fetch are subtly different, so do not try to reuse it
811 * without thinking.
812 */
813int match_refs(struct ref *src, struct ref *dst, struct ref ***dst_tail,
814 int nr_refspec, const char **refspec, int flags)
815{
816 struct refspec *rs =
817 parse_push_refspec(nr_refspec, (const char **) refspec);
818 int send_all = flags & MATCH_REFS_ALL;
819 int send_mirror = flags & MATCH_REFS_MIRROR;
820 if (match_explicit_refs(src, dst, dst_tail, rs, nr_refspec))
822 return -1;
823 /* pick the remainder */
825 for ( ; src; src = src->next) {
826 struct ref *dst_peer;
827 const struct refspec *pat = NULL;
828 char *dst_name;
829 if (src->peer_ref)
830 continue;
831 if (nr_refspec) {
832 pat = check_pattern_match(rs, nr_refspec, src);
833 if (!pat)
834 continue;
835 }
836 else if (!send_mirror && prefixcmp(src->name, "refs/heads/"))
837 /*
838 * "matching refs"; traditionally we pushed everything
839 * including refs outside refs/heads/ hierarchy, but
840 * that does not make much sense these days.
841 */
842 continue;
843 if (pat) {
845 const char *dst_side = pat->dst ? pat->dst : pat->src;
846 dst_name = xmalloc(strlen(dst_side) +
847 strlen(src->name) -
848 strlen(pat->src) + 2);
849 strcpy(dst_name, dst_side);
850 strcat(dst_name, src->name + strlen(pat->src));
851 } else
852 dst_name = xstrdup(src->name);
853 dst_peer = find_ref_by_name(dst, dst_name);
854 if (dst_peer && dst_peer->peer_ref)
855 /* We're already sending something to this ref. */
856 goto free_name;
857 if (!dst_peer && !nr_refspec && !(send_all || send_mirror))
859 /*
860 * Remote doesn't have it, and we have no
861 * explicit pattern, and we don't have
862 * --all nor --mirror.
863 */
864 goto free_name;
865 if (!dst_peer) {
866 /* Create a new one and link it */
867 dst_peer = make_linked_ref(dst_name, dst_tail);
868 hashcpy(dst_peer->new_sha1, src->new_sha1);
869 }
870 dst_peer->peer_ref = src;
871 if (pat)
872 dst_peer->force = pat->force;
873 free_name:
874 free(dst_name);
875 }
876 return 0;
877}
878struct branch *branch_get(const char *name)
880{
881 struct branch *ret;
882 read_config();
884 if (!name || !*name || !strcmp(name, "HEAD"))
885 ret = current_branch;
886 else
887 ret = make_branch(name, 0);
888 if (ret && ret->remote_name) {
889 ret->remote = remote_get(ret->remote_name);
890 if (ret->merge_nr) {
891 int i;
892 ret->merge = xcalloc(sizeof(*ret->merge),
893 ret->merge_nr);
894 for (i = 0; i < ret->merge_nr; i++) {
895 ret->merge[i] = xcalloc(1, sizeof(**ret->merge));
896 ret->merge[i]->src = xstrdup(ret->merge_name[i]);
897 remote_find_tracking(ret->remote,
898 ret->merge[i]);
899 }
900 }
901 }
902 return ret;
903}
904int branch_has_merge_config(struct branch *branch)
906{
907 return branch && !!branch->merge;
908}
909int branch_merge_matches(struct branch *branch,
911 int i,
912 const char *refname)
913{
914 if (!branch || i < 0 || i >= branch->merge_nr)
915 return 0;
916 return refname_match(branch->merge[i]->src, refname, ref_fetch_rules);
917}
918static struct ref *get_expanded_map(const struct ref *remote_refs,
920 const struct refspec *refspec)
921{
922 const struct ref *ref;
923 struct ref *ret = NULL;
924 struct ref **tail = &ret;
925 int remote_prefix_len = strlen(refspec->src);
927 int local_prefix_len = strlen(refspec->dst);
928 for (ref = remote_refs; ref; ref = ref->next) {
930 if (strchr(ref->name, '^'))
931 continue; /* a dereference item */
932 if (!prefixcmp(ref->name, refspec->src)) {
933 const char *match;
934 struct ref *cpy = copy_ref(ref);
935 match = ref->name + remote_prefix_len;
936 cpy->peer_ref = alloc_ref(local_prefix_len +
938 strlen(match) + 1);
939 sprintf(cpy->peer_ref->name, "%s%s",
940 refspec->dst, match);
941 if (refspec->force)
942 cpy->peer_ref->force = 1;
943 *tail = cpy;
944 tail = &cpy->next;
945 }
946 }
947 return ret;
949}
950static const struct ref *find_ref_by_name_abbrev(const struct ref *refs, const char *name)
952{
953 const struct ref *ref;
954 for (ref = refs; ref; ref = ref->next) {
955 if (refname_match(name, ref->name, ref_fetch_rules))
956 return ref;
957 }
958 return NULL;
959}
960struct ref *get_remote_ref(const struct ref *remote_refs, const char *name)
962{
963 const struct ref *ref = find_ref_by_name_abbrev(remote_refs, name);
964 if (!ref)
966 return NULL;
967 return copy_ref(ref);
969}
970static struct ref *get_local_ref(const char *name)
972{
973 struct ref *ret;
974 if (!name)
975 return NULL;
976 if (!prefixcmp(name, "refs/")) {
978 ret = alloc_ref(strlen(name) + 1);
979 strcpy(ret->name, name);
980 return ret;
981 }
982 if (!prefixcmp(name, "heads/") ||
984 !prefixcmp(name, "tags/") ||
985 !prefixcmp(name, "remotes/")) {
986 ret = alloc_ref(strlen(name) + 6);
987 sprintf(ret->name, "refs/%s", name);
988 return ret;
989 }
990 ret = alloc_ref(strlen(name) + 12);
992 sprintf(ret->name, "refs/heads/%s", name);
993 return ret;
994}
995int get_fetch_map(const struct ref *remote_refs,
997 const struct refspec *refspec,
998 struct ref ***tail,
999 int missing_ok)
1000{
1001 struct ref *ref_map, **rmp;
1002 if (refspec->pattern) {
1004 ref_map = get_expanded_map(remote_refs, refspec);
1005 } else {
1006 const char *name = refspec->src[0] ? refspec->src : "HEAD";
1007 ref_map = get_remote_ref(remote_refs, name);
1009 if (!missing_ok && !ref_map)
1010 die("Couldn't find remote ref %s", name);
1011 if (ref_map) {
1012 ref_map->peer_ref = get_local_ref(refspec->dst);
1013 if (ref_map->peer_ref && refspec->force)
1014 ref_map->peer_ref->force = 1;
1015 }
1016 }
1017 for (rmp = &ref_map; *rmp; ) {
1019 if ((*rmp)->peer_ref) {
1020 int st = check_ref_format((*rmp)->peer_ref->name + 5);
1021 if (st && st != CHECK_REF_FORMAT_ONELEVEL) {
1022 struct ref *ignore = *rmp;
1023 error("* Ignoring funny ref '%s' locally",
1024 (*rmp)->peer_ref->name);
1025 *rmp = (*rmp)->next;
1026 free(ignore->peer_ref);
1027 free(ignore);
1028 continue;
1029 }
1030 }
1031 rmp = &((*rmp)->next);
1032 }
1033 if (ref_map)
1035 tail_link_ref(ref_map, tail);
1036 return 0;
1038}