imap-send: support subjectAltName as well
[git/jnareb-git.git] / remote.c
blobca42a126ad04514f0ed8378768ebce98cfc5a659
1 #include "cache.h"
2 #include "remote.h"
3 #include "refs.h"
4 #include "commit.h"
5 #include "diff.h"
6 #include "revision.h"
7 #include "dir.h"
8 #include "tag.h"
9 #include "string-list.h"
11 static struct refspec s_tag_refspec = {
15 "refs/tags/*",
16 "refs/tags/*"
19 const struct refspec *tag_refspec = &s_tag_refspec;
21 struct counted_string {
22 size_t len;
23 const char *s;
25 struct rewrite {
26 const char *base;
27 size_t baselen;
28 struct counted_string *instead_of;
29 int instead_of_nr;
30 int instead_of_alloc;
32 struct rewrites {
33 struct rewrite **rewrite;
34 int rewrite_alloc;
35 int rewrite_nr;
38 static struct remote **remotes;
39 static int remotes_alloc;
40 static int remotes_nr;
42 static struct branch **branches;
43 static int branches_alloc;
44 static int branches_nr;
46 static struct branch *current_branch;
47 static const char *default_remote_name;
48 static int explicit_default_remote_name;
50 static struct rewrites rewrites;
51 static struct rewrites rewrites_push;
53 #define BUF_SIZE (2048)
54 static char buffer[BUF_SIZE];
56 static int valid_remote(const struct remote *remote)
58 return (!!remote->url) || (!!remote->foreign_vcs);
61 static const char *alias_url(const char *url, struct rewrites *r)
63 int i, j;
64 char *ret;
65 struct counted_string *longest;
66 int longest_i;
68 longest = NULL;
69 longest_i = -1;
70 for (i = 0; i < r->rewrite_nr; i++) {
71 if (!r->rewrite[i])
72 continue;
73 for (j = 0; j < r->rewrite[i]->instead_of_nr; j++) {
74 if (!prefixcmp(url, r->rewrite[i]->instead_of[j].s) &&
75 (!longest ||
76 longest->len < r->rewrite[i]->instead_of[j].len)) {
77 longest = &(r->rewrite[i]->instead_of[j]);
78 longest_i = i;
82 if (!longest)
83 return url;
85 ret = xmalloc(r->rewrite[longest_i]->baselen +
86 (strlen(url) - longest->len) + 1);
87 strcpy(ret, r->rewrite[longest_i]->base);
88 strcpy(ret + r->rewrite[longest_i]->baselen, url + longest->len);
89 return ret;
92 static void add_push_refspec(struct remote *remote, const char *ref)
94 ALLOC_GROW(remote->push_refspec,
95 remote->push_refspec_nr + 1,
96 remote->push_refspec_alloc);
97 remote->push_refspec[remote->push_refspec_nr++] = ref;
100 static void add_fetch_refspec(struct remote *remote, const char *ref)
102 ALLOC_GROW(remote->fetch_refspec,
103 remote->fetch_refspec_nr + 1,
104 remote->fetch_refspec_alloc);
105 remote->fetch_refspec[remote->fetch_refspec_nr++] = ref;
108 static void add_url(struct remote *remote, const char *url)
110 ALLOC_GROW(remote->url, remote->url_nr + 1, remote->url_alloc);
111 remote->url[remote->url_nr++] = url;
114 static void add_pushurl(struct remote *remote, const char *pushurl)
116 ALLOC_GROW(remote->pushurl, remote->pushurl_nr + 1, remote->pushurl_alloc);
117 remote->pushurl[remote->pushurl_nr++] = pushurl;
120 static void add_pushurl_alias(struct remote *remote, const char *url)
122 const char *pushurl = alias_url(url, &rewrites_push);
123 if (pushurl != url)
124 add_pushurl(remote, pushurl);
127 static void add_url_alias(struct remote *remote, const char *url)
129 add_url(remote, alias_url(url, &rewrites));
130 add_pushurl_alias(remote, url);
133 static struct remote *make_remote(const char *name, int len)
135 struct remote *ret;
136 int i;
138 for (i = 0; i < remotes_nr; i++) {
139 if (len ? (!strncmp(name, remotes[i]->name, len) &&
140 !remotes[i]->name[len]) :
141 !strcmp(name, remotes[i]->name))
142 return remotes[i];
145 ret = xcalloc(1, sizeof(struct remote));
146 ALLOC_GROW(remotes, remotes_nr + 1, remotes_alloc);
147 remotes[remotes_nr++] = ret;
148 if (len)
149 ret->name = xstrndup(name, len);
150 else
151 ret->name = xstrdup(name);
152 return ret;
155 static void add_merge(struct branch *branch, const char *name)
157 ALLOC_GROW(branch->merge_name, branch->merge_nr + 1,
158 branch->merge_alloc);
159 branch->merge_name[branch->merge_nr++] = name;
162 static struct branch *make_branch(const char *name, int len)
164 struct branch *ret;
165 int i;
166 char *refname;
168 for (i = 0; i < branches_nr; i++) {
169 if (len ? (!strncmp(name, branches[i]->name, len) &&
170 !branches[i]->name[len]) :
171 !strcmp(name, branches[i]->name))
172 return branches[i];
175 ALLOC_GROW(branches, branches_nr + 1, branches_alloc);
176 ret = xcalloc(1, sizeof(struct branch));
177 branches[branches_nr++] = ret;
178 if (len)
179 ret->name = xstrndup(name, len);
180 else
181 ret->name = xstrdup(name);
182 refname = xmalloc(strlen(name) + strlen("refs/heads/") + 1);
183 strcpy(refname, "refs/heads/");
184 strcpy(refname + strlen("refs/heads/"), ret->name);
185 ret->refname = refname;
187 return ret;
190 static struct rewrite *make_rewrite(struct rewrites *r, const char *base, int len)
192 struct rewrite *ret;
193 int i;
195 for (i = 0; i < r->rewrite_nr; i++) {
196 if (len
197 ? (len == r->rewrite[i]->baselen &&
198 !strncmp(base, r->rewrite[i]->base, len))
199 : !strcmp(base, r->rewrite[i]->base))
200 return r->rewrite[i];
203 ALLOC_GROW(r->rewrite, r->rewrite_nr + 1, r->rewrite_alloc);
204 ret = xcalloc(1, sizeof(struct rewrite));
205 r->rewrite[r->rewrite_nr++] = ret;
206 if (len) {
207 ret->base = xstrndup(base, len);
208 ret->baselen = len;
210 else {
211 ret->base = xstrdup(base);
212 ret->baselen = strlen(base);
214 return ret;
217 static void add_instead_of(struct rewrite *rewrite, const char *instead_of)
219 ALLOC_GROW(rewrite->instead_of, rewrite->instead_of_nr + 1, rewrite->instead_of_alloc);
220 rewrite->instead_of[rewrite->instead_of_nr].s = instead_of;
221 rewrite->instead_of[rewrite->instead_of_nr].len = strlen(instead_of);
222 rewrite->instead_of_nr++;
225 static void read_remotes_file(struct remote *remote)
227 FILE *f = fopen(git_path("remotes/%s", remote->name), "r");
229 if (!f)
230 return;
231 remote->origin = REMOTE_REMOTES;
232 while (fgets(buffer, BUF_SIZE, f)) {
233 int value_list;
234 char *s, *p;
236 if (!prefixcmp(buffer, "URL:")) {
237 value_list = 0;
238 s = buffer + 4;
239 } else if (!prefixcmp(buffer, "Push:")) {
240 value_list = 1;
241 s = buffer + 5;
242 } else if (!prefixcmp(buffer, "Pull:")) {
243 value_list = 2;
244 s = buffer + 5;
245 } else
246 continue;
248 while (isspace(*s))
249 s++;
250 if (!*s)
251 continue;
253 p = s + strlen(s);
254 while (isspace(p[-1]))
255 *--p = 0;
257 switch (value_list) {
258 case 0:
259 add_url_alias(remote, xstrdup(s));
260 break;
261 case 1:
262 add_push_refspec(remote, xstrdup(s));
263 break;
264 case 2:
265 add_fetch_refspec(remote, xstrdup(s));
266 break;
269 fclose(f);
272 static void read_branches_file(struct remote *remote)
274 const char *slash = strchr(remote->name, '/');
275 char *frag;
276 struct strbuf branch = STRBUF_INIT;
277 int n = slash ? slash - remote->name : 1000;
278 FILE *f = fopen(git_path("branches/%.*s", n, remote->name), "r");
279 char *s, *p;
280 int len;
282 if (!f)
283 return;
284 s = fgets(buffer, BUF_SIZE, f);
285 fclose(f);
286 if (!s)
287 return;
288 while (isspace(*s))
289 s++;
290 if (!*s)
291 return;
292 remote->origin = REMOTE_BRANCHES;
293 p = s + strlen(s);
294 while (isspace(p[-1]))
295 *--p = 0;
296 len = p - s;
297 if (slash)
298 len += strlen(slash);
299 p = xmalloc(len + 1);
300 strcpy(p, s);
301 if (slash)
302 strcat(p, slash);
305 * With "slash", e.g. "git fetch jgarzik/netdev-2.6" when
306 * reading from $GIT_DIR/branches/jgarzik fetches "HEAD" from
307 * the partial URL obtained from the branches file plus
308 * "/netdev-2.6" and does not store it in any tracking ref.
309 * #branch specifier in the file is ignored.
311 * Otherwise, the branches file would have URL and optionally
312 * #branch specified. The "master" (or specified) branch is
313 * fetched and stored in the local branch of the same name.
315 frag = strchr(p, '#');
316 if (frag) {
317 *(frag++) = '\0';
318 strbuf_addf(&branch, "refs/heads/%s", frag);
319 } else
320 strbuf_addstr(&branch, "refs/heads/master");
321 if (!slash) {
322 strbuf_addf(&branch, ":refs/heads/%s", remote->name);
323 } else {
324 strbuf_reset(&branch);
325 strbuf_addstr(&branch, "HEAD:");
327 add_url_alias(remote, p);
328 add_fetch_refspec(remote, strbuf_detach(&branch, NULL));
330 * Cogito compatible push: push current HEAD to remote #branch
331 * (master if missing)
333 strbuf_init(&branch, 0);
334 strbuf_addstr(&branch, "HEAD");
335 if (frag)
336 strbuf_addf(&branch, ":refs/heads/%s", frag);
337 else
338 strbuf_addstr(&branch, ":refs/heads/master");
339 add_push_refspec(remote, strbuf_detach(&branch, NULL));
340 remote->fetch_tags = 1; /* always auto-follow */
343 static int handle_config(const char *key, const char *value, void *cb)
345 const char *name;
346 const char *subkey;
347 struct remote *remote;
348 struct branch *branch;
349 if (!prefixcmp(key, "branch.")) {
350 name = key + 7;
351 subkey = strrchr(name, '.');
352 if (!subkey)
353 return 0;
354 branch = make_branch(name, subkey - name);
355 if (!strcmp(subkey, ".remote")) {
356 if (!value)
357 return config_error_nonbool(key);
358 branch->remote_name = xstrdup(value);
359 if (branch == current_branch) {
360 default_remote_name = branch->remote_name;
361 explicit_default_remote_name = 1;
363 } else if (!strcmp(subkey, ".merge")) {
364 if (!value)
365 return config_error_nonbool(key);
366 add_merge(branch, xstrdup(value));
368 return 0;
370 if (!prefixcmp(key, "url.")) {
371 struct rewrite *rewrite;
372 name = key + 4;
373 subkey = strrchr(name, '.');
374 if (!subkey)
375 return 0;
376 if (!strcmp(subkey, ".insteadof")) {
377 rewrite = make_rewrite(&rewrites, name, subkey - name);
378 if (!value)
379 return config_error_nonbool(key);
380 add_instead_of(rewrite, xstrdup(value));
381 } else if (!strcmp(subkey, ".pushinsteadof")) {
382 rewrite = make_rewrite(&rewrites_push, name, subkey - name);
383 if (!value)
384 return config_error_nonbool(key);
385 add_instead_of(rewrite, xstrdup(value));
388 if (prefixcmp(key, "remote."))
389 return 0;
390 name = key + 7;
391 if (*name == '/') {
392 warning("Config remote shorthand cannot begin with '/': %s",
393 name);
394 return 0;
396 subkey = strrchr(name, '.');
397 if (!subkey)
398 return 0;
399 remote = make_remote(name, subkey - name);
400 remote->origin = REMOTE_CONFIG;
401 if (!strcmp(subkey, ".mirror"))
402 remote->mirror = git_config_bool(key, value);
403 else if (!strcmp(subkey, ".skipdefaultupdate"))
404 remote->skip_default_update = git_config_bool(key, value);
405 else if (!strcmp(subkey, ".skipfetchall"))
406 remote->skip_default_update = git_config_bool(key, value);
407 else if (!strcmp(subkey, ".url")) {
408 const char *v;
409 if (git_config_string(&v, key, value))
410 return -1;
411 add_url(remote, v);
412 } else if (!strcmp(subkey, ".pushurl")) {
413 const char *v;
414 if (git_config_string(&v, key, value))
415 return -1;
416 add_pushurl(remote, v);
417 } else if (!strcmp(subkey, ".push")) {
418 const char *v;
419 if (git_config_string(&v, key, value))
420 return -1;
421 add_push_refspec(remote, v);
422 } else if (!strcmp(subkey, ".fetch")) {
423 const char *v;
424 if (git_config_string(&v, key, value))
425 return -1;
426 add_fetch_refspec(remote, v);
427 } else if (!strcmp(subkey, ".receivepack")) {
428 const char *v;
429 if (git_config_string(&v, key, value))
430 return -1;
431 if (!remote->receivepack)
432 remote->receivepack = v;
433 else
434 error("more than one receivepack given, using the first");
435 } else if (!strcmp(subkey, ".uploadpack")) {
436 const char *v;
437 if (git_config_string(&v, key, value))
438 return -1;
439 if (!remote->uploadpack)
440 remote->uploadpack = v;
441 else
442 error("more than one uploadpack given, using the first");
443 } else if (!strcmp(subkey, ".tagopt")) {
444 if (!strcmp(value, "--no-tags"))
445 remote->fetch_tags = -1;
446 else if (!strcmp(value, "--tags"))
447 remote->fetch_tags = 2;
448 } else if (!strcmp(subkey, ".proxy")) {
449 return git_config_string((const char **)&remote->http_proxy,
450 key, value);
451 } else if (!strcmp(subkey, ".vcs")) {
452 return git_config_string(&remote->foreign_vcs, key, value);
454 return 0;
457 static void alias_all_urls(void)
459 int i, j;
460 for (i = 0; i < remotes_nr; i++) {
461 int add_pushurl_aliases;
462 if (!remotes[i])
463 continue;
464 for (j = 0; j < remotes[i]->pushurl_nr; j++) {
465 remotes[i]->pushurl[j] = alias_url(remotes[i]->pushurl[j], &rewrites);
467 add_pushurl_aliases = remotes[i]->pushurl_nr == 0;
468 for (j = 0; j < remotes[i]->url_nr; j++) {
469 if (add_pushurl_aliases)
470 add_pushurl_alias(remotes[i], remotes[i]->url[j]);
471 remotes[i]->url[j] = alias_url(remotes[i]->url[j], &rewrites);
476 static void read_config(void)
478 unsigned char sha1[20];
479 const char *head_ref;
480 int flag;
481 if (default_remote_name) /* did this already */
482 return;
483 default_remote_name = xstrdup("origin");
484 current_branch = NULL;
485 head_ref = resolve_ref("HEAD", sha1, 0, &flag);
486 if (head_ref && (flag & REF_ISSYMREF) &&
487 !prefixcmp(head_ref, "refs/heads/")) {
488 current_branch =
489 make_branch(head_ref + strlen("refs/heads/"), 0);
491 git_config(handle_config, NULL);
492 alias_all_urls();
496 * We need to make sure the remote-tracking branches are well formed, but a
497 * wildcard refspec in "struct refspec" must have a trailing slash. We
498 * temporarily drop the trailing '/' while calling check_ref_format(),
499 * and put it back. The caller knows that a CHECK_REF_FORMAT_ONELEVEL
500 * error return is Ok for a wildcard refspec.
502 static int verify_refname(char *name, int is_glob)
504 int result;
506 result = check_ref_format(name);
507 if (is_glob && result == CHECK_REF_FORMAT_WILDCARD)
508 result = CHECK_REF_FORMAT_OK;
509 return result;
513 * This function frees a refspec array.
514 * Warning: code paths should be checked to ensure that the src
515 * and dst pointers are always freeable pointers as well
516 * as the refspec pointer itself.
518 static void free_refspecs(struct refspec *refspec, int nr_refspec)
520 int i;
522 if (!refspec)
523 return;
525 for (i = 0; i < nr_refspec; i++) {
526 free(refspec[i].src);
527 free(refspec[i].dst);
529 free(refspec);
532 static struct refspec *parse_refspec_internal(int nr_refspec, const char **refspec, int fetch, int verify)
534 int i;
535 int st;
536 struct refspec *rs = xcalloc(sizeof(*rs), nr_refspec);
538 for (i = 0; i < nr_refspec; i++) {
539 size_t llen;
540 int is_glob;
541 const char *lhs, *rhs;
543 is_glob = 0;
545 lhs = refspec[i];
546 if (*lhs == '+') {
547 rs[i].force = 1;
548 lhs++;
551 rhs = strrchr(lhs, ':');
554 * Before going on, special case ":" (or "+:") as a refspec
555 * for matching refs.
557 if (!fetch && rhs == lhs && rhs[1] == '\0') {
558 rs[i].matching = 1;
559 continue;
562 if (rhs) {
563 size_t rlen = strlen(++rhs);
564 is_glob = (1 <= rlen && strchr(rhs, '*'));
565 rs[i].dst = xstrndup(rhs, rlen);
568 llen = (rhs ? (rhs - lhs - 1) : strlen(lhs));
569 if (1 <= llen && memchr(lhs, '*', llen)) {
570 if ((rhs && !is_glob) || (!rhs && fetch))
571 goto invalid;
572 is_glob = 1;
573 } else if (rhs && is_glob) {
574 goto invalid;
577 rs[i].pattern = is_glob;
578 rs[i].src = xstrndup(lhs, llen);
580 if (fetch) {
582 * LHS
583 * - empty is allowed; it means HEAD.
584 * - otherwise it must be a valid looking ref.
586 if (!*rs[i].src)
587 ; /* empty is ok */
588 else {
589 st = verify_refname(rs[i].src, is_glob);
590 if (st && st != CHECK_REF_FORMAT_ONELEVEL)
591 goto invalid;
594 * RHS
595 * - missing is ok, and is same as empty.
596 * - empty is ok; it means not to store.
597 * - otherwise it must be a valid looking ref.
599 if (!rs[i].dst) {
600 ; /* ok */
601 } else if (!*rs[i].dst) {
602 ; /* ok */
603 } else {
604 st = verify_refname(rs[i].dst, is_glob);
605 if (st && st != CHECK_REF_FORMAT_ONELEVEL)
606 goto invalid;
608 } else {
610 * LHS
611 * - empty is allowed; it means delete.
612 * - when wildcarded, it must be a valid looking ref.
613 * - otherwise, it must be an extended SHA-1, but
614 * there is no existing way to validate this.
616 if (!*rs[i].src)
617 ; /* empty is ok */
618 else if (is_glob) {
619 st = verify_refname(rs[i].src, is_glob);
620 if (st && st != CHECK_REF_FORMAT_ONELEVEL)
621 goto invalid;
623 else
624 ; /* anything goes, for now */
626 * RHS
627 * - missing is allowed, but LHS then must be a
628 * valid looking ref.
629 * - empty is not allowed.
630 * - otherwise it must be a valid looking ref.
632 if (!rs[i].dst) {
633 st = verify_refname(rs[i].src, is_glob);
634 if (st && st != CHECK_REF_FORMAT_ONELEVEL)
635 goto invalid;
636 } else if (!*rs[i].dst) {
637 goto invalid;
638 } else {
639 st = verify_refname(rs[i].dst, is_glob);
640 if (st && st != CHECK_REF_FORMAT_ONELEVEL)
641 goto invalid;
645 return rs;
647 invalid:
648 if (verify) {
650 * nr_refspec must be greater than zero and i must be valid
651 * since it is only possible to reach this point from within
652 * the for loop above.
654 free_refspecs(rs, i+1);
655 return NULL;
657 die("Invalid refspec '%s'", refspec[i]);
660 int valid_fetch_refspec(const char *fetch_refspec_str)
662 struct refspec *refspec;
664 refspec = parse_refspec_internal(1, &fetch_refspec_str, 1, 1);
665 free_refspecs(refspec, 1);
666 return !!refspec;
669 struct refspec *parse_fetch_refspec(int nr_refspec, const char **refspec)
671 return parse_refspec_internal(nr_refspec, refspec, 1, 0);
674 static struct refspec *parse_push_refspec(int nr_refspec, const char **refspec)
676 return parse_refspec_internal(nr_refspec, refspec, 0, 0);
679 void free_refspec(int nr_refspec, struct refspec *refspec)
681 int i;
682 for (i = 0; i < nr_refspec; i++) {
683 free(refspec[i].src);
684 free(refspec[i].dst);
686 free(refspec);
689 static int valid_remote_nick(const char *name)
691 if (!name[0] || is_dot_or_dotdot(name))
692 return 0;
693 return !strchr(name, '/'); /* no slash */
696 struct remote *remote_get(const char *name)
698 struct remote *ret;
699 int name_given = 0;
701 read_config();
702 if (name)
703 name_given = 1;
704 else {
705 name = default_remote_name;
706 name_given = explicit_default_remote_name;
709 ret = make_remote(name, 0);
710 if (valid_remote_nick(name)) {
711 if (!valid_remote(ret))
712 read_remotes_file(ret);
713 if (!valid_remote(ret))
714 read_branches_file(ret);
716 if (name_given && !valid_remote(ret))
717 add_url_alias(ret, name);
718 if (!valid_remote(ret))
719 return NULL;
720 ret->fetch = parse_fetch_refspec(ret->fetch_refspec_nr, ret->fetch_refspec);
721 ret->push = parse_push_refspec(ret->push_refspec_nr, ret->push_refspec);
722 return ret;
725 int remote_is_configured(const char *name)
727 int i;
728 read_config();
730 for (i = 0; i < remotes_nr; i++)
731 if (!strcmp(name, remotes[i]->name))
732 return 1;
733 return 0;
736 int for_each_remote(each_remote_fn fn, void *priv)
738 int i, result = 0;
739 read_config();
740 for (i = 0; i < remotes_nr && !result; i++) {
741 struct remote *r = remotes[i];
742 if (!r)
743 continue;
744 if (!r->fetch)
745 r->fetch = parse_fetch_refspec(r->fetch_refspec_nr,
746 r->fetch_refspec);
747 if (!r->push)
748 r->push = parse_push_refspec(r->push_refspec_nr,
749 r->push_refspec);
750 result = fn(r, priv);
752 return result;
755 void ref_remove_duplicates(struct ref *ref_map)
757 struct string_list refs = STRING_LIST_INIT_NODUP;
758 struct string_list_item *item = NULL;
759 struct ref *prev = NULL, *next = NULL;
760 for (; ref_map; prev = ref_map, ref_map = next) {
761 next = ref_map->next;
762 if (!ref_map->peer_ref)
763 continue;
765 item = string_list_lookup(&refs, ref_map->peer_ref->name);
766 if (item) {
767 if (strcmp(((struct ref *)item->util)->name,
768 ref_map->name))
769 die("%s tracks both %s and %s",
770 ref_map->peer_ref->name,
771 ((struct ref *)item->util)->name,
772 ref_map->name);
773 prev->next = ref_map->next;
774 free(ref_map->peer_ref);
775 free(ref_map);
776 ref_map = prev; /* skip this; we freed it */
777 continue;
780 item = string_list_insert(&refs, ref_map->peer_ref->name);
781 item->util = ref_map;
783 string_list_clear(&refs, 0);
786 int remote_has_url(struct remote *remote, const char *url)
788 int i;
789 for (i = 0; i < remote->url_nr; i++) {
790 if (!strcmp(remote->url[i], url))
791 return 1;
793 return 0;
796 static int match_name_with_pattern(const char *key, const char *name,
797 const char *value, char **result)
799 const char *kstar = strchr(key, '*');
800 size_t klen;
801 size_t ksuffixlen;
802 size_t namelen;
803 int ret;
804 if (!kstar)
805 die("Key '%s' of pattern had no '*'", key);
806 klen = kstar - key;
807 ksuffixlen = strlen(kstar + 1);
808 namelen = strlen(name);
809 ret = !strncmp(name, key, klen) && namelen >= klen + ksuffixlen &&
810 !memcmp(name + namelen - ksuffixlen, kstar + 1, ksuffixlen);
811 if (ret && value) {
812 const char *vstar = strchr(value, '*');
813 size_t vlen;
814 size_t vsuffixlen;
815 if (!vstar)
816 die("Value '%s' of pattern has no '*'", value);
817 vlen = vstar - value;
818 vsuffixlen = strlen(vstar + 1);
819 *result = xmalloc(vlen + vsuffixlen +
820 strlen(name) -
821 klen - ksuffixlen + 1);
822 strncpy(*result, value, vlen);
823 strncpy(*result + vlen,
824 name + klen, namelen - klen - ksuffixlen);
825 strcpy(*result + vlen + namelen - klen - ksuffixlen,
826 vstar + 1);
828 return ret;
831 char *apply_refspecs(struct refspec *refspecs, int nr_refspec,
832 const char *name)
834 int i;
835 char *ret = NULL;
836 for (i = 0; i < nr_refspec; i++) {
837 struct refspec *refspec = refspecs + i;
838 if (refspec->pattern) {
839 if (match_name_with_pattern(refspec->src, name,
840 refspec->dst, &ret))
841 return ret;
842 } else if (!strcmp(refspec->src, name))
843 return strdup(refspec->dst);
845 return NULL;
848 int remote_find_tracking(struct remote *remote, struct refspec *refspec)
850 int find_src = refspec->src == NULL;
851 char *needle, **result;
852 int i;
854 if (find_src) {
855 if (!refspec->dst)
856 return error("find_tracking: need either src or dst");
857 needle = refspec->dst;
858 result = &refspec->src;
859 } else {
860 needle = refspec->src;
861 result = &refspec->dst;
864 for (i = 0; i < remote->fetch_refspec_nr; i++) {
865 struct refspec *fetch = &remote->fetch[i];
866 const char *key = find_src ? fetch->dst : fetch->src;
867 const char *value = find_src ? fetch->src : fetch->dst;
868 if (!fetch->dst)
869 continue;
870 if (fetch->pattern) {
871 if (match_name_with_pattern(key, needle, value, result)) {
872 refspec->force = fetch->force;
873 return 0;
875 } else if (!strcmp(needle, key)) {
876 *result = xstrdup(value);
877 refspec->force = fetch->force;
878 return 0;
881 return -1;
884 static struct ref *alloc_ref_with_prefix(const char *prefix, size_t prefixlen,
885 const char *name)
887 size_t len = strlen(name);
888 struct ref *ref = xcalloc(1, sizeof(struct ref) + prefixlen + len + 1);
889 memcpy(ref->name, prefix, prefixlen);
890 memcpy(ref->name + prefixlen, name, len);
891 return ref;
894 struct ref *alloc_ref(const char *name)
896 return alloc_ref_with_prefix("", 0, name);
899 static struct ref *copy_ref(const struct ref *ref)
901 struct ref *cpy;
902 size_t len;
903 if (!ref)
904 return NULL;
905 len = strlen(ref->name);
906 cpy = xmalloc(sizeof(struct ref) + len + 1);
907 memcpy(cpy, ref, sizeof(struct ref) + len + 1);
908 cpy->next = NULL;
909 cpy->symref = ref->symref ? xstrdup(ref->symref) : NULL;
910 cpy->remote_status = ref->remote_status ? xstrdup(ref->remote_status) : NULL;
911 cpy->peer_ref = copy_ref(ref->peer_ref);
912 return cpy;
915 struct ref *copy_ref_list(const struct ref *ref)
917 struct ref *ret = NULL;
918 struct ref **tail = &ret;
919 while (ref) {
920 *tail = copy_ref(ref);
921 ref = ref->next;
922 tail = &((*tail)->next);
924 return ret;
927 static void free_ref(struct ref *ref)
929 if (!ref)
930 return;
931 free_ref(ref->peer_ref);
932 free(ref->remote_status);
933 free(ref->symref);
934 free(ref);
937 void free_refs(struct ref *ref)
939 struct ref *next;
940 while (ref) {
941 next = ref->next;
942 free_ref(ref);
943 ref = next;
947 static int count_refspec_match(const char *pattern,
948 struct ref *refs,
949 struct ref **matched_ref)
951 int patlen = strlen(pattern);
952 struct ref *matched_weak = NULL;
953 struct ref *matched = NULL;
954 int weak_match = 0;
955 int match = 0;
957 for (weak_match = match = 0; refs; refs = refs->next) {
958 char *name = refs->name;
959 int namelen = strlen(name);
961 if (!refname_match(pattern, name, ref_rev_parse_rules))
962 continue;
964 /* A match is "weak" if it is with refs outside
965 * heads or tags, and did not specify the pattern
966 * in full (e.g. "refs/remotes/origin/master") or at
967 * least from the toplevel (e.g. "remotes/origin/master");
968 * otherwise "git push $URL master" would result in
969 * ambiguity between remotes/origin/master and heads/master
970 * at the remote site.
972 if (namelen != patlen &&
973 patlen != namelen - 5 &&
974 prefixcmp(name, "refs/heads/") &&
975 prefixcmp(name, "refs/tags/")) {
976 /* We want to catch the case where only weak
977 * matches are found and there are multiple
978 * matches, and where more than one strong
979 * matches are found, as ambiguous. One
980 * strong match with zero or more weak matches
981 * are acceptable as a unique match.
983 matched_weak = refs;
984 weak_match++;
986 else {
987 matched = refs;
988 match++;
991 if (!matched) {
992 *matched_ref = matched_weak;
993 return weak_match;
995 else {
996 *matched_ref = matched;
997 return match;
1001 static void tail_link_ref(struct ref *ref, struct ref ***tail)
1003 **tail = ref;
1004 while (ref->next)
1005 ref = ref->next;
1006 *tail = &ref->next;
1009 static struct ref *try_explicit_object_name(const char *name)
1011 unsigned char sha1[20];
1012 struct ref *ref;
1014 if (!*name) {
1015 ref = alloc_ref("(delete)");
1016 hashclr(ref->new_sha1);
1017 return ref;
1019 if (get_sha1(name, sha1))
1020 return NULL;
1021 ref = alloc_ref(name);
1022 hashcpy(ref->new_sha1, sha1);
1023 return ref;
1026 static struct ref *make_linked_ref(const char *name, struct ref ***tail)
1028 struct ref *ret = alloc_ref(name);
1029 tail_link_ref(ret, tail);
1030 return ret;
1033 static char *guess_ref(const char *name, struct ref *peer)
1035 struct strbuf buf = STRBUF_INIT;
1036 unsigned char sha1[20];
1038 const char *r = resolve_ref(peer->name, sha1, 1, NULL);
1039 if (!r)
1040 return NULL;
1042 if (!prefixcmp(r, "refs/heads/"))
1043 strbuf_addstr(&buf, "refs/heads/");
1044 else if (!prefixcmp(r, "refs/tags/"))
1045 strbuf_addstr(&buf, "refs/tags/");
1046 else
1047 return NULL;
1049 strbuf_addstr(&buf, name);
1050 return strbuf_detach(&buf, NULL);
1053 static int match_explicit(struct ref *src, struct ref *dst,
1054 struct ref ***dst_tail,
1055 struct refspec *rs)
1057 struct ref *matched_src, *matched_dst;
1058 int copy_src;
1060 const char *dst_value = rs->dst;
1061 char *dst_guess;
1063 if (rs->pattern || rs->matching)
1064 return 0;
1066 matched_src = matched_dst = NULL;
1067 switch (count_refspec_match(rs->src, src, &matched_src)) {
1068 case 1:
1069 copy_src = 1;
1070 break;
1071 case 0:
1072 /* The source could be in the get_sha1() format
1073 * not a reference name. :refs/other is a
1074 * way to delete 'other' ref at the remote end.
1076 matched_src = try_explicit_object_name(rs->src);
1077 if (!matched_src)
1078 return error("src refspec %s does not match any.", rs->src);
1079 copy_src = 0;
1080 break;
1081 default:
1082 return error("src refspec %s matches more than one.", rs->src);
1085 if (!dst_value) {
1086 unsigned char sha1[20];
1087 int flag;
1089 dst_value = resolve_ref(matched_src->name, sha1, 1, &flag);
1090 if (!dst_value ||
1091 ((flag & REF_ISSYMREF) &&
1092 prefixcmp(dst_value, "refs/heads/")))
1093 die("%s cannot be resolved to branch.",
1094 matched_src->name);
1097 switch (count_refspec_match(dst_value, dst, &matched_dst)) {
1098 case 1:
1099 break;
1100 case 0:
1101 if (!memcmp(dst_value, "refs/", 5))
1102 matched_dst = make_linked_ref(dst_value, dst_tail);
1103 else if ((dst_guess = guess_ref(dst_value, matched_src)))
1104 matched_dst = make_linked_ref(dst_guess, dst_tail);
1105 else
1106 error("unable to push to unqualified destination: %s\n"
1107 "The destination refspec neither matches an "
1108 "existing ref on the remote nor\n"
1109 "begins with refs/, and we are unable to "
1110 "guess a prefix based on the source ref.",
1111 dst_value);
1112 break;
1113 default:
1114 matched_dst = NULL;
1115 error("dst refspec %s matches more than one.",
1116 dst_value);
1117 break;
1119 if (!matched_dst)
1120 return -1;
1121 if (matched_dst->peer_ref)
1122 return error("dst ref %s receives from more than one src.",
1123 matched_dst->name);
1124 else {
1125 matched_dst->peer_ref = copy_src ? copy_ref(matched_src) : matched_src;
1126 matched_dst->force = rs->force;
1128 return 0;
1131 static int match_explicit_refs(struct ref *src, struct ref *dst,
1132 struct ref ***dst_tail, struct refspec *rs,
1133 int rs_nr)
1135 int i, errs;
1136 for (i = errs = 0; i < rs_nr; i++)
1137 errs += match_explicit(src, dst, dst_tail, &rs[i]);
1138 return errs;
1141 static const struct refspec *check_pattern_match(const struct refspec *rs,
1142 int rs_nr,
1143 const struct ref *src)
1145 int i;
1146 int matching_refs = -1;
1147 for (i = 0; i < rs_nr; i++) {
1148 if (rs[i].matching &&
1149 (matching_refs == -1 || rs[i].force)) {
1150 matching_refs = i;
1151 continue;
1154 if (rs[i].pattern && match_name_with_pattern(rs[i].src, src->name,
1155 NULL, NULL))
1156 return rs + i;
1158 if (matching_refs != -1)
1159 return rs + matching_refs;
1160 else
1161 return NULL;
1164 static struct ref **tail_ref(struct ref **head)
1166 struct ref **tail = head;
1167 while (*tail)
1168 tail = &((*tail)->next);
1169 return tail;
1173 * Note. This is used only by "push"; refspec matching rules for
1174 * push and fetch are subtly different, so do not try to reuse it
1175 * without thinking.
1177 int match_refs(struct ref *src, struct ref **dst,
1178 int nr_refspec, const char **refspec, int flags)
1180 struct refspec *rs;
1181 int send_all = flags & MATCH_REFS_ALL;
1182 int send_mirror = flags & MATCH_REFS_MIRROR;
1183 int errs;
1184 static const char *default_refspec[] = { ":", NULL };
1185 struct ref **dst_tail = tail_ref(dst);
1187 if (!nr_refspec) {
1188 nr_refspec = 1;
1189 refspec = default_refspec;
1191 rs = parse_push_refspec(nr_refspec, (const char **) refspec);
1192 errs = match_explicit_refs(src, *dst, &dst_tail, rs, nr_refspec);
1194 /* pick the remainder */
1195 for ( ; src; src = src->next) {
1196 struct ref *dst_peer;
1197 const struct refspec *pat = NULL;
1198 char *dst_name;
1199 if (src->peer_ref)
1200 continue;
1202 pat = check_pattern_match(rs, nr_refspec, src);
1203 if (!pat)
1204 continue;
1206 if (pat->matching) {
1208 * "matching refs"; traditionally we pushed everything
1209 * including refs outside refs/heads/ hierarchy, but
1210 * that does not make much sense these days.
1212 if (!send_mirror && prefixcmp(src->name, "refs/heads/"))
1213 continue;
1214 dst_name = xstrdup(src->name);
1216 } else {
1217 const char *dst_side = pat->dst ? pat->dst : pat->src;
1218 if (!match_name_with_pattern(pat->src, src->name,
1219 dst_side, &dst_name))
1220 die("Didn't think it matches any more");
1222 dst_peer = find_ref_by_name(*dst, dst_name);
1223 if (dst_peer) {
1224 if (dst_peer->peer_ref)
1225 /* We're already sending something to this ref. */
1226 goto free_name;
1228 } else {
1229 if (pat->matching && !(send_all || send_mirror))
1231 * Remote doesn't have it, and we have no
1232 * explicit pattern, and we don't have
1233 * --all nor --mirror.
1235 goto free_name;
1237 /* Create a new one and link it */
1238 dst_peer = make_linked_ref(dst_name, &dst_tail);
1239 hashcpy(dst_peer->new_sha1, src->new_sha1);
1241 dst_peer->peer_ref = copy_ref(src);
1242 dst_peer->force = pat->force;
1243 free_name:
1244 free(dst_name);
1246 if (errs)
1247 return -1;
1248 return 0;
1251 void set_ref_status_for_push(struct ref *remote_refs, int send_mirror,
1252 int force_update)
1254 struct ref *ref;
1256 for (ref = remote_refs; ref; ref = ref->next) {
1257 if (ref->peer_ref)
1258 hashcpy(ref->new_sha1, ref->peer_ref->new_sha1);
1259 else if (!send_mirror)
1260 continue;
1262 ref->deletion = is_null_sha1(ref->new_sha1);
1263 if (!ref->deletion &&
1264 !hashcmp(ref->old_sha1, ref->new_sha1)) {
1265 ref->status = REF_STATUS_UPTODATE;
1266 continue;
1269 /* This part determines what can overwrite what.
1270 * The rules are:
1272 * (0) you can always use --force or +A:B notation to
1273 * selectively force individual ref pairs.
1275 * (1) if the old thing does not exist, it is OK.
1277 * (2) if you do not have the old thing, you are not allowed
1278 * to overwrite it; you would not know what you are losing
1279 * otherwise.
1281 * (3) if both new and old are commit-ish, and new is a
1282 * descendant of old, it is OK.
1284 * (4) regardless of all of the above, removing :B is
1285 * always allowed.
1288 ref->nonfastforward =
1289 !ref->deletion &&
1290 !is_null_sha1(ref->old_sha1) &&
1291 (!has_sha1_file(ref->old_sha1)
1292 || !ref_newer(ref->new_sha1, ref->old_sha1));
1294 if (ref->nonfastforward && !ref->force && !force_update) {
1295 ref->status = REF_STATUS_REJECT_NONFASTFORWARD;
1296 continue;
1301 struct branch *branch_get(const char *name)
1303 struct branch *ret;
1305 read_config();
1306 if (!name || !*name || !strcmp(name, "HEAD"))
1307 ret = current_branch;
1308 else
1309 ret = make_branch(name, 0);
1310 if (ret && ret->remote_name) {
1311 ret->remote = remote_get(ret->remote_name);
1312 if (ret->merge_nr) {
1313 int i;
1314 ret->merge = xcalloc(sizeof(*ret->merge),
1315 ret->merge_nr);
1316 for (i = 0; i < ret->merge_nr; i++) {
1317 ret->merge[i] = xcalloc(1, sizeof(**ret->merge));
1318 ret->merge[i]->src = xstrdup(ret->merge_name[i]);
1319 if (remote_find_tracking(ret->remote, ret->merge[i])
1320 && !strcmp(ret->remote_name, "."))
1321 ret->merge[i]->dst = xstrdup(ret->merge_name[i]);
1325 return ret;
1328 int branch_has_merge_config(struct branch *branch)
1330 return branch && !!branch->merge;
1333 int branch_merge_matches(struct branch *branch,
1334 int i,
1335 const char *refname)
1337 if (!branch || i < 0 || i >= branch->merge_nr)
1338 return 0;
1339 return refname_match(branch->merge[i]->src, refname, ref_fetch_rules);
1342 static struct ref *get_expanded_map(const struct ref *remote_refs,
1343 const struct refspec *refspec)
1345 const struct ref *ref;
1346 struct ref *ret = NULL;
1347 struct ref **tail = &ret;
1349 char *expn_name;
1351 for (ref = remote_refs; ref; ref = ref->next) {
1352 if (strchr(ref->name, '^'))
1353 continue; /* a dereference item */
1354 if (match_name_with_pattern(refspec->src, ref->name,
1355 refspec->dst, &expn_name)) {
1356 struct ref *cpy = copy_ref(ref);
1358 cpy->peer_ref = alloc_ref(expn_name);
1359 free(expn_name);
1360 if (refspec->force)
1361 cpy->peer_ref->force = 1;
1362 *tail = cpy;
1363 tail = &cpy->next;
1367 return ret;
1370 static const struct ref *find_ref_by_name_abbrev(const struct ref *refs, const char *name)
1372 const struct ref *ref;
1373 for (ref = refs; ref; ref = ref->next) {
1374 if (refname_match(name, ref->name, ref_fetch_rules))
1375 return ref;
1377 return NULL;
1380 struct ref *get_remote_ref(const struct ref *remote_refs, const char *name)
1382 const struct ref *ref = find_ref_by_name_abbrev(remote_refs, name);
1384 if (!ref)
1385 return NULL;
1387 return copy_ref(ref);
1390 static struct ref *get_local_ref(const char *name)
1392 if (!name || name[0] == '\0')
1393 return NULL;
1395 if (!prefixcmp(name, "refs/"))
1396 return alloc_ref(name);
1398 if (!prefixcmp(name, "heads/") ||
1399 !prefixcmp(name, "tags/") ||
1400 !prefixcmp(name, "remotes/"))
1401 return alloc_ref_with_prefix("refs/", 5, name);
1403 return alloc_ref_with_prefix("refs/heads/", 11, name);
1406 int get_fetch_map(const struct ref *remote_refs,
1407 const struct refspec *refspec,
1408 struct ref ***tail,
1409 int missing_ok)
1411 struct ref *ref_map, **rmp;
1413 if (refspec->pattern) {
1414 ref_map = get_expanded_map(remote_refs, refspec);
1415 } else {
1416 const char *name = refspec->src[0] ? refspec->src : "HEAD";
1418 ref_map = get_remote_ref(remote_refs, name);
1419 if (!missing_ok && !ref_map)
1420 die("Couldn't find remote ref %s", name);
1421 if (ref_map) {
1422 ref_map->peer_ref = get_local_ref(refspec->dst);
1423 if (ref_map->peer_ref && refspec->force)
1424 ref_map->peer_ref->force = 1;
1428 for (rmp = &ref_map; *rmp; ) {
1429 if ((*rmp)->peer_ref) {
1430 int st = check_ref_format((*rmp)->peer_ref->name + 5);
1431 if (st && st != CHECK_REF_FORMAT_ONELEVEL) {
1432 struct ref *ignore = *rmp;
1433 error("* Ignoring funny ref '%s' locally",
1434 (*rmp)->peer_ref->name);
1435 *rmp = (*rmp)->next;
1436 free(ignore->peer_ref);
1437 free(ignore);
1438 continue;
1441 rmp = &((*rmp)->next);
1444 if (ref_map)
1445 tail_link_ref(ref_map, tail);
1447 return 0;
1450 int resolve_remote_symref(struct ref *ref, struct ref *list)
1452 if (!ref->symref)
1453 return 0;
1454 for (; list; list = list->next)
1455 if (!strcmp(ref->symref, list->name)) {
1456 hashcpy(ref->old_sha1, list->old_sha1);
1457 return 0;
1459 return 1;
1462 static void unmark_and_free(struct commit_list *list, unsigned int mark)
1464 while (list) {
1465 struct commit_list *temp = list;
1466 temp->item->object.flags &= ~mark;
1467 list = temp->next;
1468 free(temp);
1472 int ref_newer(const unsigned char *new_sha1, const unsigned char *old_sha1)
1474 struct object *o;
1475 struct commit *old, *new;
1476 struct commit_list *list, *used;
1477 int found = 0;
1479 /* Both new and old must be commit-ish and new is descendant of
1480 * old. Otherwise we require --force.
1482 o = deref_tag(parse_object(old_sha1), NULL, 0);
1483 if (!o || o->type != OBJ_COMMIT)
1484 return 0;
1485 old = (struct commit *) o;
1487 o = deref_tag(parse_object(new_sha1), NULL, 0);
1488 if (!o || o->type != OBJ_COMMIT)
1489 return 0;
1490 new = (struct commit *) o;
1492 if (parse_commit(new) < 0)
1493 return 0;
1495 used = list = NULL;
1496 commit_list_insert(new, &list);
1497 while (list) {
1498 new = pop_most_recent_commit(&list, TMP_MARK);
1499 commit_list_insert(new, &used);
1500 if (new == old) {
1501 found = 1;
1502 break;
1505 unmark_and_free(list, TMP_MARK);
1506 unmark_and_free(used, TMP_MARK);
1507 return found;
1511 * Return true if there is anything to report, otherwise false.
1513 int stat_tracking_info(struct branch *branch, int *num_ours, int *num_theirs)
1515 unsigned char sha1[20];
1516 struct commit *ours, *theirs;
1517 char symmetric[84];
1518 struct rev_info revs;
1519 const char *rev_argv[10], *base;
1520 int rev_argc;
1523 * Nothing to report unless we are marked to build on top of
1524 * somebody else.
1526 if (!branch ||
1527 !branch->merge || !branch->merge[0] || !branch->merge[0]->dst)
1528 return 0;
1531 * If what we used to build on no longer exists, there is
1532 * nothing to report.
1534 base = branch->merge[0]->dst;
1535 if (!resolve_ref(base, sha1, 1, NULL))
1536 return 0;
1537 theirs = lookup_commit_reference(sha1);
1538 if (!theirs)
1539 return 0;
1541 if (!resolve_ref(branch->refname, sha1, 1, NULL))
1542 return 0;
1543 ours = lookup_commit_reference(sha1);
1544 if (!ours)
1545 return 0;
1547 /* are we the same? */
1548 if (theirs == ours)
1549 return 0;
1551 /* Run "rev-list --left-right ours...theirs" internally... */
1552 rev_argc = 0;
1553 rev_argv[rev_argc++] = NULL;
1554 rev_argv[rev_argc++] = "--left-right";
1555 rev_argv[rev_argc++] = symmetric;
1556 rev_argv[rev_argc++] = "--";
1557 rev_argv[rev_argc] = NULL;
1559 strcpy(symmetric, sha1_to_hex(ours->object.sha1));
1560 strcpy(symmetric + 40, "...");
1561 strcpy(symmetric + 43, sha1_to_hex(theirs->object.sha1));
1563 init_revisions(&revs, NULL);
1564 setup_revisions(rev_argc, rev_argv, &revs, NULL);
1565 prepare_revision_walk(&revs);
1567 /* ... and count the commits on each side. */
1568 *num_ours = 0;
1569 *num_theirs = 0;
1570 while (1) {
1571 struct commit *c = get_revision(&revs);
1572 if (!c)
1573 break;
1574 if (c->object.flags & SYMMETRIC_LEFT)
1575 (*num_ours)++;
1576 else
1577 (*num_theirs)++;
1580 /* clear object flags smudged by the above traversal */
1581 clear_commit_marks(ours, ALL_REV_FLAGS);
1582 clear_commit_marks(theirs, ALL_REV_FLAGS);
1583 return 1;
1587 * Return true when there is anything to report, otherwise false.
1589 int format_tracking_info(struct branch *branch, struct strbuf *sb)
1591 int num_ours, num_theirs;
1592 const char *base;
1594 if (!stat_tracking_info(branch, &num_ours, &num_theirs))
1595 return 0;
1597 base = branch->merge[0]->dst;
1598 base = shorten_unambiguous_ref(base, 0);
1599 if (!num_theirs)
1600 strbuf_addf(sb, "Your branch is ahead of '%s' "
1601 "by %d commit%s.\n",
1602 base, num_ours, (num_ours == 1) ? "" : "s");
1603 else if (!num_ours)
1604 strbuf_addf(sb, "Your branch is behind '%s' "
1605 "by %d commit%s, "
1606 "and can be fast-forwarded.\n",
1607 base, num_theirs, (num_theirs == 1) ? "" : "s");
1608 else
1609 strbuf_addf(sb, "Your branch and '%s' have diverged,\n"
1610 "and have %d and %d different commit(s) each, "
1611 "respectively.\n",
1612 base, num_ours, num_theirs);
1613 return 1;
1616 static int one_local_ref(const char *refname, const unsigned char *sha1, int flag, void *cb_data)
1618 struct ref ***local_tail = cb_data;
1619 struct ref *ref;
1620 int len;
1622 /* we already know it starts with refs/ to get here */
1623 if (check_ref_format(refname + 5))
1624 return 0;
1626 len = strlen(refname) + 1;
1627 ref = xcalloc(1, sizeof(*ref) + len);
1628 hashcpy(ref->new_sha1, sha1);
1629 memcpy(ref->name, refname, len);
1630 **local_tail = ref;
1631 *local_tail = &ref->next;
1632 return 0;
1635 struct ref *get_local_heads(void)
1637 struct ref *local_refs = NULL, **local_tail = &local_refs;
1638 for_each_ref(one_local_ref, &local_tail);
1639 return local_refs;
1642 struct ref *guess_remote_head(const struct ref *head,
1643 const struct ref *refs,
1644 int all)
1646 const struct ref *r;
1647 struct ref *list = NULL;
1648 struct ref **tail = &list;
1650 if (!head)
1651 return NULL;
1654 * Some transports support directly peeking at
1655 * where HEAD points; if that is the case, then
1656 * we don't have to guess.
1658 if (head->symref)
1659 return copy_ref(find_ref_by_name(refs, head->symref));
1661 /* If refs/heads/master could be right, it is. */
1662 if (!all) {
1663 r = find_ref_by_name(refs, "refs/heads/master");
1664 if (r && !hashcmp(r->old_sha1, head->old_sha1))
1665 return copy_ref(r);
1668 /* Look for another ref that points there */
1669 for (r = refs; r; r = r->next) {
1670 if (r != head && !hashcmp(r->old_sha1, head->old_sha1)) {
1671 *tail = copy_ref(r);
1672 tail = &((*tail)->next);
1673 if (!all)
1674 break;
1678 return list;
1681 struct stale_heads_info {
1682 struct remote *remote;
1683 struct string_list *ref_names;
1684 struct ref **stale_refs_tail;
1687 static int get_stale_heads_cb(const char *refname,
1688 const unsigned char *sha1, int flags, void *cb_data)
1690 struct stale_heads_info *info = cb_data;
1691 struct refspec refspec;
1692 memset(&refspec, 0, sizeof(refspec));
1693 refspec.dst = (char *)refname;
1694 if (!remote_find_tracking(info->remote, &refspec)) {
1695 if (!((flags & REF_ISSYMREF) ||
1696 string_list_has_string(info->ref_names, refspec.src))) {
1697 struct ref *ref = make_linked_ref(refname, &info->stale_refs_tail);
1698 hashcpy(ref->new_sha1, sha1);
1701 return 0;
1704 struct ref *get_stale_heads(struct remote *remote, struct ref *fetch_map)
1706 struct ref *ref, *stale_refs = NULL;
1707 struct string_list ref_names = STRING_LIST_INIT_NODUP;
1708 struct stale_heads_info info;
1709 info.remote = remote;
1710 info.ref_names = &ref_names;
1711 info.stale_refs_tail = &stale_refs;
1712 for (ref = fetch_map; ref; ref = ref->next)
1713 string_list_append(&ref_names, ref->name);
1714 sort_string_list(&ref_names);
1715 for_each_ref(get_stale_heads_cb, &info);
1716 string_list_clear(&ref_names, 0);
1717 return stale_refs;