gitk: Second try to work around the command line limit on Windows
[git/dscho.git] / remote.c
blobc70181cdc621b27ed02aba17b3e4f7ab64518e9f
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(subkey, ".proxy")) {
447 return git_config_string((const char **)&remote->http_proxy,
448 key, value);
449 } else if (!strcmp(subkey, ".vcs")) {
450 return git_config_string(&remote->foreign_vcs, key, value);
452 return 0;
455 static void alias_all_urls(void)
457 int i, j;
458 for (i = 0; i < remotes_nr; i++) {
459 int add_pushurl_aliases;
460 if (!remotes[i])
461 continue;
462 for (j = 0; j < remotes[i]->pushurl_nr; j++) {
463 remotes[i]->pushurl[j] = alias_url(remotes[i]->pushurl[j], &rewrites);
465 add_pushurl_aliases = remotes[i]->pushurl_nr == 0;
466 for (j = 0; j < remotes[i]->url_nr; j++) {
467 if (add_pushurl_aliases)
468 add_pushurl_alias(remotes[i], remotes[i]->url[j]);
469 remotes[i]->url[j] = alias_url(remotes[i]->url[j], &rewrites);
474 static void read_config(void)
476 unsigned char sha1[20];
477 const char *head_ref;
478 int flag;
479 if (default_remote_name) // did this already
480 return;
481 default_remote_name = xstrdup("origin");
482 current_branch = NULL;
483 head_ref = resolve_ref("HEAD", sha1, 0, &flag);
484 if (head_ref && (flag & REF_ISSYMREF) &&
485 !prefixcmp(head_ref, "refs/heads/")) {
486 current_branch =
487 make_branch(head_ref + strlen("refs/heads/"), 0);
489 git_config(handle_config, NULL);
490 alias_all_urls();
494 * We need to make sure the tracking branches are well formed, but a
495 * wildcard refspec in "struct refspec" must have a trailing slash. We
496 * temporarily drop the trailing '/' while calling check_ref_format(),
497 * and put it back. The caller knows that a CHECK_REF_FORMAT_ONELEVEL
498 * error return is Ok for a wildcard refspec.
500 static int verify_refname(char *name, int is_glob)
502 int result;
504 result = check_ref_format(name);
505 if (is_glob && result == CHECK_REF_FORMAT_WILDCARD)
506 result = CHECK_REF_FORMAT_OK;
507 return result;
511 * This function frees a refspec array.
512 * Warning: code paths should be checked to ensure that the src
513 * and dst pointers are always freeable pointers as well
514 * as the refspec pointer itself.
516 static void free_refspecs(struct refspec *refspec, int nr_refspec)
518 int i;
520 if (!refspec)
521 return;
523 for (i = 0; i < nr_refspec; i++) {
524 free(refspec[i].src);
525 free(refspec[i].dst);
527 free(refspec);
530 static struct refspec *parse_refspec_internal(int nr_refspec, const char **refspec, int fetch, int verify)
532 int i;
533 int st;
534 struct refspec *rs = xcalloc(sizeof(*rs), nr_refspec);
536 for (i = 0; i < nr_refspec; i++) {
537 size_t llen;
538 int is_glob;
539 const char *lhs, *rhs;
541 is_glob = 0;
543 lhs = refspec[i];
544 if (*lhs == '+') {
545 rs[i].force = 1;
546 lhs++;
549 rhs = strrchr(lhs, ':');
552 * Before going on, special case ":" (or "+:") as a refspec
553 * for matching refs.
555 if (!fetch && rhs == lhs && rhs[1] == '\0') {
556 rs[i].matching = 1;
557 continue;
560 if (rhs) {
561 size_t rlen = strlen(++rhs);
562 is_glob = (1 <= rlen && strchr(rhs, '*'));
563 rs[i].dst = xstrndup(rhs, rlen);
566 llen = (rhs ? (rhs - lhs - 1) : strlen(lhs));
567 if (1 <= llen && memchr(lhs, '*', llen)) {
568 if ((rhs && !is_glob) || (!rhs && fetch))
569 goto invalid;
570 is_glob = 1;
571 } else if (rhs && is_glob) {
572 goto invalid;
575 rs[i].pattern = is_glob;
576 rs[i].src = xstrndup(lhs, llen);
578 if (fetch) {
580 * LHS
581 * - empty is allowed; it means HEAD.
582 * - otherwise it must be a valid looking ref.
584 if (!*rs[i].src)
585 ; /* empty is ok */
586 else {
587 st = verify_refname(rs[i].src, is_glob);
588 if (st && st != CHECK_REF_FORMAT_ONELEVEL)
589 goto invalid;
592 * RHS
593 * - missing is ok, and is same as empty.
594 * - empty is ok; it means not to store.
595 * - otherwise it must be a valid looking ref.
597 if (!rs[i].dst) {
598 ; /* ok */
599 } else if (!*rs[i].dst) {
600 ; /* ok */
601 } else {
602 st = verify_refname(rs[i].dst, is_glob);
603 if (st && st != CHECK_REF_FORMAT_ONELEVEL)
604 goto invalid;
606 } else {
608 * LHS
609 * - empty is allowed; it means delete.
610 * - when wildcarded, it must be a valid looking ref.
611 * - otherwise, it must be an extended SHA-1, but
612 * there is no existing way to validate this.
614 if (!*rs[i].src)
615 ; /* empty is ok */
616 else if (is_glob) {
617 st = verify_refname(rs[i].src, is_glob);
618 if (st && st != CHECK_REF_FORMAT_ONELEVEL)
619 goto invalid;
621 else
622 ; /* anything goes, for now */
624 * RHS
625 * - missing is allowed, but LHS then must be a
626 * valid looking ref.
627 * - empty is not allowed.
628 * - otherwise it must be a valid looking ref.
630 if (!rs[i].dst) {
631 st = verify_refname(rs[i].src, is_glob);
632 if (st && st != CHECK_REF_FORMAT_ONELEVEL)
633 goto invalid;
634 } else if (!*rs[i].dst) {
635 goto invalid;
636 } else {
637 st = verify_refname(rs[i].dst, is_glob);
638 if (st && st != CHECK_REF_FORMAT_ONELEVEL)
639 goto invalid;
643 return rs;
645 invalid:
646 if (verify) {
648 * nr_refspec must be greater than zero and i must be valid
649 * since it is only possible to reach this point from within
650 * the for loop above.
652 free_refspecs(rs, i+1);
653 return NULL;
655 die("Invalid refspec '%s'", refspec[i]);
658 int valid_fetch_refspec(const char *fetch_refspec_str)
660 const char *fetch_refspec[] = { fetch_refspec_str };
661 struct refspec *refspec;
663 refspec = parse_refspec_internal(1, fetch_refspec, 1, 1);
664 free_refspecs(refspec, 1);
665 return !!refspec;
668 struct refspec *parse_fetch_refspec(int nr_refspec, const char **refspec)
670 return parse_refspec_internal(nr_refspec, refspec, 1, 0);
673 static struct refspec *parse_push_refspec(int nr_refspec, const char **refspec)
675 return parse_refspec_internal(nr_refspec, refspec, 0, 0);
678 void free_refspec(int nr_refspec, struct refspec *refspec)
680 int i;
681 for (i = 0; i < nr_refspec; i++) {
682 free(refspec[i].src);
683 free(refspec[i].dst);
685 free(refspec);
688 static int valid_remote_nick(const char *name)
690 if (!name[0] || is_dot_or_dotdot(name))
691 return 0;
692 return !strchr(name, '/'); /* no slash */
695 struct remote *remote_get(const char *name)
697 struct remote *ret;
698 int name_given = 0;
700 read_config();
701 if (name)
702 name_given = 1;
703 else {
704 name = default_remote_name;
705 name_given = explicit_default_remote_name;
708 ret = make_remote(name, 0);
709 if (valid_remote_nick(name)) {
710 if (!valid_remote(ret))
711 read_remotes_file(ret);
712 if (!valid_remote(ret))
713 read_branches_file(ret);
715 if (name_given && !valid_remote(ret))
716 add_url_alias(ret, name);
717 if (!valid_remote(ret))
718 return NULL;
719 ret->fetch = parse_fetch_refspec(ret->fetch_refspec_nr, ret->fetch_refspec);
720 ret->push = parse_push_refspec(ret->push_refspec_nr, ret->push_refspec);
721 return ret;
724 int remote_is_configured(const char *name)
726 int i;
727 read_config();
729 for (i = 0; i < remotes_nr; i++)
730 if (!strcmp(name, remotes[i]->name))
731 return 1;
732 return 0;
735 int for_each_remote(each_remote_fn fn, void *priv)
737 int i, result = 0;
738 read_config();
739 for (i = 0; i < remotes_nr && !result; i++) {
740 struct remote *r = remotes[i];
741 if (!r)
742 continue;
743 if (!r->fetch)
744 r->fetch = parse_fetch_refspec(r->fetch_refspec_nr,
745 r->fetch_refspec);
746 if (!r->push)
747 r->push = parse_push_refspec(r->push_refspec_nr,
748 r->push_refspec);
749 result = fn(r, priv);
751 return result;
754 void ref_remove_duplicates(struct ref *ref_map)
756 struct string_list refs = { NULL, 0, 0, 0 };
757 struct string_list_item *item = NULL;
758 struct ref *prev = NULL, *next = NULL;
759 for (; ref_map; prev = ref_map, ref_map = next) {
760 next = ref_map->next;
761 if (!ref_map->peer_ref)
762 continue;
764 item = string_list_lookup(ref_map->peer_ref->name, &refs);
765 if (item) {
766 if (strcmp(((struct ref *)item->util)->name,
767 ref_map->name))
768 die("%s tracks both %s and %s",
769 ref_map->peer_ref->name,
770 ((struct ref *)item->util)->name,
771 ref_map->name);
772 prev->next = ref_map->next;
773 free(ref_map->peer_ref);
774 free(ref_map);
775 ref_map = prev; /* skip this; we freed it */
776 continue;
779 item = string_list_insert(ref_map->peer_ref->name, &refs);
780 item->util = ref_map;
782 string_list_clear(&refs, 0);
785 int remote_has_url(struct remote *remote, const char *url)
787 int i;
788 for (i = 0; i < remote->url_nr; i++) {
789 if (!strcmp(remote->url[i], url))
790 return 1;
792 return 0;
795 static int match_name_with_pattern(const char *key, const char *name,
796 const char *value, char **result)
798 const char *kstar = strchr(key, '*');
799 size_t klen;
800 size_t ksuffixlen;
801 size_t namelen;
802 int ret;
803 if (!kstar)
804 die("Key '%s' of pattern had no '*'", key);
805 klen = kstar - key;
806 ksuffixlen = strlen(kstar + 1);
807 namelen = strlen(name);
808 ret = !strncmp(name, key, klen) && namelen >= klen + ksuffixlen &&
809 !memcmp(name + namelen - ksuffixlen, kstar + 1, ksuffixlen);
810 if (ret && value) {
811 const char *vstar = strchr(value, '*');
812 size_t vlen;
813 size_t vsuffixlen;
814 if (!vstar)
815 die("Value '%s' of pattern has no '*'", value);
816 vlen = vstar - value;
817 vsuffixlen = strlen(vstar + 1);
818 *result = xmalloc(vlen + vsuffixlen +
819 strlen(name) -
820 klen - ksuffixlen + 1);
821 strncpy(*result, value, vlen);
822 strncpy(*result + vlen,
823 name + klen, namelen - klen - ksuffixlen);
824 strcpy(*result + vlen + namelen - klen - ksuffixlen,
825 vstar + 1);
827 return ret;
830 char *apply_refspecs(struct refspec *refspecs, int nr_refspec,
831 const char *name)
833 int i;
834 char *ret = NULL;
835 for (i = 0; i < nr_refspec; i++) {
836 struct refspec *refspec = refspecs + i;
837 if (refspec->pattern) {
838 if (match_name_with_pattern(refspec->src, name,
839 refspec->dst, &ret))
840 return ret;
841 } else if (!strcmp(refspec->src, name))
842 return strdup(refspec->dst);
844 return NULL;
847 int remote_find_tracking(struct remote *remote, struct refspec *refspec)
849 int find_src = refspec->src == NULL;
850 char *needle, **result;
851 int i;
853 if (find_src) {
854 if (!refspec->dst)
855 return error("find_tracking: need either src or dst");
856 needle = refspec->dst;
857 result = &refspec->src;
858 } else {
859 needle = refspec->src;
860 result = &refspec->dst;
863 for (i = 0; i < remote->fetch_refspec_nr; i++) {
864 struct refspec *fetch = &remote->fetch[i];
865 const char *key = find_src ? fetch->dst : fetch->src;
866 const char *value = find_src ? fetch->src : fetch->dst;
867 if (!fetch->dst)
868 continue;
869 if (fetch->pattern) {
870 if (match_name_with_pattern(key, needle, value, result)) {
871 refspec->force = fetch->force;
872 return 0;
874 } else if (!strcmp(needle, key)) {
875 *result = xstrdup(value);
876 refspec->force = fetch->force;
877 return 0;
880 return -1;
883 static struct ref *alloc_ref_with_prefix(const char *prefix, size_t prefixlen,
884 const char *name)
886 size_t len = strlen(name);
887 struct ref *ref = xcalloc(1, sizeof(struct ref) + prefixlen + len + 1);
888 memcpy(ref->name, prefix, prefixlen);
889 memcpy(ref->name + prefixlen, name, len);
890 return ref;
893 struct ref *alloc_ref(const char *name)
895 return alloc_ref_with_prefix("", 0, name);
898 static struct ref *copy_ref(const struct ref *ref)
900 struct ref *cpy;
901 size_t len;
902 if (!ref)
903 return NULL;
904 len = strlen(ref->name);
905 cpy = xmalloc(sizeof(struct ref) + len + 1);
906 memcpy(cpy, ref, sizeof(struct ref) + len + 1);
907 cpy->next = NULL;
908 cpy->symref = ref->symref ? xstrdup(ref->symref) : NULL;
909 cpy->remote_status = ref->remote_status ? xstrdup(ref->remote_status) : NULL;
910 cpy->peer_ref = copy_ref(ref->peer_ref);
911 return cpy;
914 struct ref *copy_ref_list(const struct ref *ref)
916 struct ref *ret = NULL;
917 struct ref **tail = &ret;
918 while (ref) {
919 *tail = copy_ref(ref);
920 ref = ref->next;
921 tail = &((*tail)->next);
923 return ret;
926 static void free_ref(struct ref *ref)
928 if (!ref)
929 return;
930 free_ref(ref->peer_ref);
931 free(ref->remote_status);
932 free(ref->symref);
933 free(ref);
936 void free_refs(struct ref *ref)
938 struct ref *next;
939 while (ref) {
940 next = ref->next;
941 free_ref(ref);
942 ref = next;
946 static int count_refspec_match(const char *pattern,
947 struct ref *refs,
948 struct ref **matched_ref)
950 int patlen = strlen(pattern);
951 struct ref *matched_weak = NULL;
952 struct ref *matched = NULL;
953 int weak_match = 0;
954 int match = 0;
956 for (weak_match = match = 0; refs; refs = refs->next) {
957 char *name = refs->name;
958 int namelen = strlen(name);
960 if (!refname_match(pattern, name, ref_rev_parse_rules))
961 continue;
963 /* A match is "weak" if it is with refs outside
964 * heads or tags, and did not specify the pattern
965 * in full (e.g. "refs/remotes/origin/master") or at
966 * least from the toplevel (e.g. "remotes/origin/master");
967 * otherwise "git push $URL master" would result in
968 * ambiguity between remotes/origin/master and heads/master
969 * at the remote site.
971 if (namelen != patlen &&
972 patlen != namelen - 5 &&
973 prefixcmp(name, "refs/heads/") &&
974 prefixcmp(name, "refs/tags/")) {
975 /* We want to catch the case where only weak
976 * matches are found and there are multiple
977 * matches, and where more than one strong
978 * matches are found, as ambiguous. One
979 * strong match with zero or more weak matches
980 * are acceptable as a unique match.
982 matched_weak = refs;
983 weak_match++;
985 else {
986 matched = refs;
987 match++;
990 if (!matched) {
991 *matched_ref = matched_weak;
992 return weak_match;
994 else {
995 *matched_ref = matched;
996 return match;
1000 static void tail_link_ref(struct ref *ref, struct ref ***tail)
1002 **tail = ref;
1003 while (ref->next)
1004 ref = ref->next;
1005 *tail = &ref->next;
1008 static struct ref *try_explicit_object_name(const char *name)
1010 unsigned char sha1[20];
1011 struct ref *ref;
1013 if (!*name) {
1014 ref = alloc_ref("(delete)");
1015 hashclr(ref->new_sha1);
1016 return ref;
1018 if (get_sha1(name, sha1))
1019 return NULL;
1020 ref = alloc_ref(name);
1021 hashcpy(ref->new_sha1, sha1);
1022 return ref;
1025 static struct ref *make_linked_ref(const char *name, struct ref ***tail)
1027 struct ref *ret = alloc_ref(name);
1028 tail_link_ref(ret, tail);
1029 return ret;
1032 static char *guess_ref(const char *name, struct ref *peer)
1034 struct strbuf buf = STRBUF_INIT;
1035 unsigned char sha1[20];
1037 const char *r = resolve_ref(peer->name, sha1, 1, NULL);
1038 if (!r)
1039 return NULL;
1041 if (!prefixcmp(r, "refs/heads/"))
1042 strbuf_addstr(&buf, "refs/heads/");
1043 else if (!prefixcmp(r, "refs/tags/"))
1044 strbuf_addstr(&buf, "refs/tags/");
1045 else
1046 return NULL;
1048 strbuf_addstr(&buf, name);
1049 return strbuf_detach(&buf, NULL);
1052 static int match_explicit(struct ref *src, struct ref *dst,
1053 struct ref ***dst_tail,
1054 struct refspec *rs)
1056 struct ref *matched_src, *matched_dst;
1057 int copy_src;
1059 const char *dst_value = rs->dst;
1060 char *dst_guess;
1062 if (rs->pattern || rs->matching)
1063 return 0;
1065 matched_src = matched_dst = NULL;
1066 switch (count_refspec_match(rs->src, src, &matched_src)) {
1067 case 1:
1068 copy_src = 1;
1069 break;
1070 case 0:
1071 /* The source could be in the get_sha1() format
1072 * not a reference name. :refs/other is a
1073 * way to delete 'other' ref at the remote end.
1075 matched_src = try_explicit_object_name(rs->src);
1076 if (!matched_src)
1077 return error("src refspec %s does not match any.", rs->src);
1078 copy_src = 0;
1079 break;
1080 default:
1081 return error("src refspec %s matches more than one.", rs->src);
1084 if (!dst_value) {
1085 unsigned char sha1[20];
1086 int flag;
1088 dst_value = resolve_ref(matched_src->name, sha1, 1, &flag);
1089 if (!dst_value ||
1090 ((flag & REF_ISSYMREF) &&
1091 prefixcmp(dst_value, "refs/heads/")))
1092 die("%s cannot be resolved to branch.",
1093 matched_src->name);
1096 switch (count_refspec_match(dst_value, dst, &matched_dst)) {
1097 case 1:
1098 break;
1099 case 0:
1100 if (!memcmp(dst_value, "refs/", 5))
1101 matched_dst = make_linked_ref(dst_value, dst_tail);
1102 else if ((dst_guess = guess_ref(dst_value, matched_src)))
1103 matched_dst = make_linked_ref(dst_guess, dst_tail);
1104 else
1105 error("unable to push to unqualified destination: %s\n"
1106 "The destination refspec neither matches an "
1107 "existing ref on the remote nor\n"
1108 "begins with refs/, and we are unable to "
1109 "guess a prefix based on the source ref.",
1110 dst_value);
1111 break;
1112 default:
1113 matched_dst = NULL;
1114 error("dst refspec %s matches more than one.",
1115 dst_value);
1116 break;
1118 if (!matched_dst)
1119 return -1;
1120 if (matched_dst->peer_ref)
1121 return error("dst ref %s receives from more than one src.",
1122 matched_dst->name);
1123 else {
1124 matched_dst->peer_ref = copy_src ? copy_ref(matched_src) : matched_src;
1125 matched_dst->force = rs->force;
1127 return 0;
1130 static int match_explicit_refs(struct ref *src, struct ref *dst,
1131 struct ref ***dst_tail, struct refspec *rs,
1132 int rs_nr)
1134 int i, errs;
1135 for (i = errs = 0; i < rs_nr; i++)
1136 errs += match_explicit(src, dst, dst_tail, &rs[i]);
1137 return errs;
1140 static const struct refspec *check_pattern_match(const struct refspec *rs,
1141 int rs_nr,
1142 const struct ref *src)
1144 int i;
1145 int matching_refs = -1;
1146 for (i = 0; i < rs_nr; i++) {
1147 if (rs[i].matching &&
1148 (matching_refs == -1 || rs[i].force)) {
1149 matching_refs = i;
1150 continue;
1153 if (rs[i].pattern && match_name_with_pattern(rs[i].src, src->name,
1154 NULL, NULL))
1155 return rs + i;
1157 if (matching_refs != -1)
1158 return rs + matching_refs;
1159 else
1160 return NULL;
1163 static struct ref **tail_ref(struct ref **head)
1165 struct ref **tail = head;
1166 while (*tail)
1167 tail = &((*tail)->next);
1168 return tail;
1172 * Note. This is used only by "push"; refspec matching rules for
1173 * push and fetch are subtly different, so do not try to reuse it
1174 * without thinking.
1176 int match_refs(struct ref *src, struct ref **dst,
1177 int nr_refspec, const char **refspec, int flags)
1179 struct refspec *rs;
1180 int send_all = flags & MATCH_REFS_ALL;
1181 int send_mirror = flags & MATCH_REFS_MIRROR;
1182 int errs;
1183 static const char *default_refspec[] = { ":", NULL };
1184 struct ref **dst_tail = tail_ref(dst);
1186 if (!nr_refspec) {
1187 nr_refspec = 1;
1188 refspec = default_refspec;
1190 rs = parse_push_refspec(nr_refspec, (const char **) refspec);
1191 errs = match_explicit_refs(src, *dst, &dst_tail, rs, nr_refspec);
1193 /* pick the remainder */
1194 for ( ; src; src = src->next) {
1195 struct ref *dst_peer;
1196 const struct refspec *pat = NULL;
1197 char *dst_name;
1198 if (src->peer_ref)
1199 continue;
1201 pat = check_pattern_match(rs, nr_refspec, src);
1202 if (!pat)
1203 continue;
1205 if (pat->matching) {
1207 * "matching refs"; traditionally we pushed everything
1208 * including refs outside refs/heads/ hierarchy, but
1209 * that does not make much sense these days.
1211 if (!send_mirror && prefixcmp(src->name, "refs/heads/"))
1212 continue;
1213 dst_name = xstrdup(src->name);
1215 } else {
1216 const char *dst_side = pat->dst ? pat->dst : pat->src;
1217 if (!match_name_with_pattern(pat->src, src->name,
1218 dst_side, &dst_name))
1219 die("Didn't think it matches any more");
1221 dst_peer = find_ref_by_name(*dst, dst_name);
1222 if (dst_peer) {
1223 if (dst_peer->peer_ref)
1224 /* We're already sending something to this ref. */
1225 goto free_name;
1227 } else {
1228 if (pat->matching && !(send_all || send_mirror))
1230 * Remote doesn't have it, and we have no
1231 * explicit pattern, and we don't have
1232 * --all nor --mirror.
1234 goto free_name;
1236 /* Create a new one and link it */
1237 dst_peer = make_linked_ref(dst_name, &dst_tail);
1238 hashcpy(dst_peer->new_sha1, src->new_sha1);
1240 dst_peer->peer_ref = copy_ref(src);
1241 dst_peer->force = pat->force;
1242 free_name:
1243 free(dst_name);
1245 if (errs)
1246 return -1;
1247 return 0;
1250 void set_ref_status_for_push(struct ref *remote_refs, int send_mirror,
1251 int force_update)
1253 struct ref *ref;
1255 for (ref = remote_refs; ref; ref = ref->next) {
1256 if (ref->peer_ref)
1257 hashcpy(ref->new_sha1, ref->peer_ref->new_sha1);
1258 else if (!send_mirror)
1259 continue;
1261 ref->deletion = is_null_sha1(ref->new_sha1);
1262 if (!ref->deletion &&
1263 !hashcmp(ref->old_sha1, ref->new_sha1)) {
1264 ref->status = REF_STATUS_UPTODATE;
1265 continue;
1268 /* This part determines what can overwrite what.
1269 * The rules are:
1271 * (0) you can always use --force or +A:B notation to
1272 * selectively force individual ref pairs.
1274 * (1) if the old thing does not exist, it is OK.
1276 * (2) if you do not have the old thing, you are not allowed
1277 * to overwrite it; you would not know what you are losing
1278 * otherwise.
1280 * (3) if both new and old are commit-ish, and new is a
1281 * descendant of old, it is OK.
1283 * (4) regardless of all of the above, removing :B is
1284 * always allowed.
1287 ref->nonfastforward =
1288 !ref->deletion &&
1289 !is_null_sha1(ref->old_sha1) &&
1290 (!has_sha1_file(ref->old_sha1)
1291 || !ref_newer(ref->new_sha1, ref->old_sha1));
1293 if (ref->nonfastforward && !ref->force && !force_update) {
1294 ref->status = REF_STATUS_REJECT_NONFASTFORWARD;
1295 continue;
1300 struct branch *branch_get(const char *name)
1302 struct branch *ret;
1304 read_config();
1305 if (!name || !*name || !strcmp(name, "HEAD"))
1306 ret = current_branch;
1307 else
1308 ret = make_branch(name, 0);
1309 if (ret && ret->remote_name) {
1310 ret->remote = remote_get(ret->remote_name);
1311 if (ret->merge_nr) {
1312 int i;
1313 ret->merge = xcalloc(sizeof(*ret->merge),
1314 ret->merge_nr);
1315 for (i = 0; i < ret->merge_nr; i++) {
1316 ret->merge[i] = xcalloc(1, sizeof(**ret->merge));
1317 ret->merge[i]->src = xstrdup(ret->merge_name[i]);
1318 if (remote_find_tracking(ret->remote, ret->merge[i])
1319 && !strcmp(ret->remote_name, "."))
1320 ret->merge[i]->dst = xstrdup(ret->merge_name[i]);
1324 return ret;
1327 int branch_has_merge_config(struct branch *branch)
1329 return branch && !!branch->merge;
1332 int branch_merge_matches(struct branch *branch,
1333 int i,
1334 const char *refname)
1336 if (!branch || i < 0 || i >= branch->merge_nr)
1337 return 0;
1338 return refname_match(branch->merge[i]->src, refname, ref_fetch_rules);
1341 static struct ref *get_expanded_map(const struct ref *remote_refs,
1342 const struct refspec *refspec)
1344 const struct ref *ref;
1345 struct ref *ret = NULL;
1346 struct ref **tail = &ret;
1348 char *expn_name;
1350 for (ref = remote_refs; ref; ref = ref->next) {
1351 if (strchr(ref->name, '^'))
1352 continue; /* a dereference item */
1353 if (match_name_with_pattern(refspec->src, ref->name,
1354 refspec->dst, &expn_name)) {
1355 struct ref *cpy = copy_ref(ref);
1357 cpy->peer_ref = alloc_ref(expn_name);
1358 free(expn_name);
1359 if (refspec->force)
1360 cpy->peer_ref->force = 1;
1361 *tail = cpy;
1362 tail = &cpy->next;
1366 return ret;
1369 static const struct ref *find_ref_by_name_abbrev(const struct ref *refs, const char *name)
1371 const struct ref *ref;
1372 for (ref = refs; ref; ref = ref->next) {
1373 if (refname_match(name, ref->name, ref_fetch_rules))
1374 return ref;
1376 return NULL;
1379 struct ref *get_remote_ref(const struct ref *remote_refs, const char *name)
1381 const struct ref *ref = find_ref_by_name_abbrev(remote_refs, name);
1383 if (!ref)
1384 return NULL;
1386 return copy_ref(ref);
1389 static struct ref *get_local_ref(const char *name)
1391 if (!name || name[0] == '\0')
1392 return NULL;
1394 if (!prefixcmp(name, "refs/"))
1395 return alloc_ref(name);
1397 if (!prefixcmp(name, "heads/") ||
1398 !prefixcmp(name, "tags/") ||
1399 !prefixcmp(name, "remotes/"))
1400 return alloc_ref_with_prefix("refs/", 5, name);
1402 return alloc_ref_with_prefix("refs/heads/", 11, name);
1405 int get_fetch_map(const struct ref *remote_refs,
1406 const struct refspec *refspec,
1407 struct ref ***tail,
1408 int missing_ok)
1410 struct ref *ref_map, **rmp;
1412 if (refspec->pattern) {
1413 ref_map = get_expanded_map(remote_refs, refspec);
1414 } else {
1415 const char *name = refspec->src[0] ? refspec->src : "HEAD";
1417 ref_map = get_remote_ref(remote_refs, name);
1418 if (!missing_ok && !ref_map)
1419 die("Couldn't find remote ref %s", name);
1420 if (ref_map) {
1421 ref_map->peer_ref = get_local_ref(refspec->dst);
1422 if (ref_map->peer_ref && refspec->force)
1423 ref_map->peer_ref->force = 1;
1427 for (rmp = &ref_map; *rmp; ) {
1428 if ((*rmp)->peer_ref) {
1429 int st = check_ref_format((*rmp)->peer_ref->name + 5);
1430 if (st && st != CHECK_REF_FORMAT_ONELEVEL) {
1431 struct ref *ignore = *rmp;
1432 error("* Ignoring funny ref '%s' locally",
1433 (*rmp)->peer_ref->name);
1434 *rmp = (*rmp)->next;
1435 free(ignore->peer_ref);
1436 free(ignore);
1437 continue;
1440 rmp = &((*rmp)->next);
1443 if (ref_map)
1444 tail_link_ref(ref_map, tail);
1446 return 0;
1449 int resolve_remote_symref(struct ref *ref, struct ref *list)
1451 if (!ref->symref)
1452 return 0;
1453 for (; list; list = list->next)
1454 if (!strcmp(ref->symref, list->name)) {
1455 hashcpy(ref->old_sha1, list->old_sha1);
1456 return 0;
1458 return 1;
1461 static void unmark_and_free(struct commit_list *list, unsigned int mark)
1463 while (list) {
1464 struct commit_list *temp = list;
1465 temp->item->object.flags &= ~mark;
1466 list = temp->next;
1467 free(temp);
1471 int ref_newer(const unsigned char *new_sha1, const unsigned char *old_sha1)
1473 struct object *o;
1474 struct commit *old, *new;
1475 struct commit_list *list, *used;
1476 int found = 0;
1478 /* Both new and old must be commit-ish and new is descendant of
1479 * old. Otherwise we require --force.
1481 o = deref_tag(parse_object(old_sha1), NULL, 0);
1482 if (!o || o->type != OBJ_COMMIT)
1483 return 0;
1484 old = (struct commit *) o;
1486 o = deref_tag(parse_object(new_sha1), NULL, 0);
1487 if (!o || o->type != OBJ_COMMIT)
1488 return 0;
1489 new = (struct commit *) o;
1491 if (parse_commit(new) < 0)
1492 return 0;
1494 used = list = NULL;
1495 commit_list_insert(new, &list);
1496 while (list) {
1497 new = pop_most_recent_commit(&list, TMP_MARK);
1498 commit_list_insert(new, &used);
1499 if (new == old) {
1500 found = 1;
1501 break;
1504 unmark_and_free(list, TMP_MARK);
1505 unmark_and_free(used, TMP_MARK);
1506 return found;
1510 * Return true if there is anything to report, otherwise false.
1512 int stat_tracking_info(struct branch *branch, int *num_ours, int *num_theirs)
1514 unsigned char sha1[20];
1515 struct commit *ours, *theirs;
1516 char symmetric[84];
1517 struct rev_info revs;
1518 const char *rev_argv[10], *base;
1519 int rev_argc;
1522 * Nothing to report unless we are marked to build on top of
1523 * somebody else.
1525 if (!branch ||
1526 !branch->merge || !branch->merge[0] || !branch->merge[0]->dst)
1527 return 0;
1530 * If what we used to build on no longer exists, there is
1531 * nothing to report.
1533 base = branch->merge[0]->dst;
1534 if (!resolve_ref(base, sha1, 1, NULL))
1535 return 0;
1536 theirs = lookup_commit_reference(sha1);
1537 if (!theirs)
1538 return 0;
1540 if (!resolve_ref(branch->refname, sha1, 1, NULL))
1541 return 0;
1542 ours = lookup_commit_reference(sha1);
1543 if (!ours)
1544 return 0;
1546 /* are we the same? */
1547 if (theirs == ours)
1548 return 0;
1550 /* Run "rev-list --left-right ours...theirs" internally... */
1551 rev_argc = 0;
1552 rev_argv[rev_argc++] = NULL;
1553 rev_argv[rev_argc++] = "--left-right";
1554 rev_argv[rev_argc++] = symmetric;
1555 rev_argv[rev_argc++] = "--";
1556 rev_argv[rev_argc] = NULL;
1558 strcpy(symmetric, sha1_to_hex(ours->object.sha1));
1559 strcpy(symmetric + 40, "...");
1560 strcpy(symmetric + 43, sha1_to_hex(theirs->object.sha1));
1562 init_revisions(&revs, NULL);
1563 setup_revisions(rev_argc, rev_argv, &revs, NULL);
1564 prepare_revision_walk(&revs);
1566 /* ... and count the commits on each side. */
1567 *num_ours = 0;
1568 *num_theirs = 0;
1569 while (1) {
1570 struct commit *c = get_revision(&revs);
1571 if (!c)
1572 break;
1573 if (c->object.flags & SYMMETRIC_LEFT)
1574 (*num_ours)++;
1575 else
1576 (*num_theirs)++;
1579 /* clear object flags smudged by the above traversal */
1580 clear_commit_marks(ours, ALL_REV_FLAGS);
1581 clear_commit_marks(theirs, ALL_REV_FLAGS);
1582 return 1;
1586 * Return true when there is anything to report, otherwise false.
1588 int format_tracking_info(struct branch *branch, struct strbuf *sb)
1590 int num_ours, num_theirs;
1591 const char *base;
1593 if (!stat_tracking_info(branch, &num_ours, &num_theirs))
1594 return 0;
1596 base = branch->merge[0]->dst;
1597 base = shorten_unambiguous_ref(base, 0);
1598 if (!num_theirs)
1599 strbuf_addf(sb, "Your branch is ahead of '%s' "
1600 "by %d commit%s.\n",
1601 base, num_ours, (num_ours == 1) ? "" : "s");
1602 else if (!num_ours)
1603 strbuf_addf(sb, "Your branch is behind '%s' "
1604 "by %d commit%s, "
1605 "and can be fast-forwarded.\n",
1606 base, num_theirs, (num_theirs == 1) ? "" : "s");
1607 else
1608 strbuf_addf(sb, "Your branch and '%s' have diverged,\n"
1609 "and have %d and %d different commit(s) each, "
1610 "respectively.\n",
1611 base, num_ours, num_theirs);
1612 return 1;
1615 static int one_local_ref(const char *refname, const unsigned char *sha1, int flag, void *cb_data)
1617 struct ref ***local_tail = cb_data;
1618 struct ref *ref;
1619 int len;
1621 /* we already know it starts with refs/ to get here */
1622 if (check_ref_format(refname + 5))
1623 return 0;
1625 len = strlen(refname) + 1;
1626 ref = xcalloc(1, sizeof(*ref) + len);
1627 hashcpy(ref->new_sha1, sha1);
1628 memcpy(ref->name, refname, len);
1629 **local_tail = ref;
1630 *local_tail = &ref->next;
1631 return 0;
1634 struct ref *get_local_heads(void)
1636 struct ref *local_refs = NULL, **local_tail = &local_refs;
1637 for_each_ref(one_local_ref, &local_tail);
1638 return local_refs;
1641 struct ref *guess_remote_head(const struct ref *head,
1642 const struct ref *refs,
1643 int all)
1645 const struct ref *r;
1646 struct ref *list = NULL;
1647 struct ref **tail = &list;
1649 if (!head)
1650 return NULL;
1653 * Some transports support directly peeking at
1654 * where HEAD points; if that is the case, then
1655 * we don't have to guess.
1657 if (head->symref)
1658 return copy_ref(find_ref_by_name(refs, head->symref));
1660 /* If refs/heads/master could be right, it is. */
1661 if (!all) {
1662 r = find_ref_by_name(refs, "refs/heads/master");
1663 if (r && !hashcmp(r->old_sha1, head->old_sha1))
1664 return copy_ref(r);
1667 /* Look for another ref that points there */
1668 for (r = refs; r; r = r->next) {
1669 if (r != head && !hashcmp(r->old_sha1, head->old_sha1)) {
1670 *tail = copy_ref(r);
1671 tail = &((*tail)->next);
1672 if (!all)
1673 break;
1677 return list;
1680 struct stale_heads_info {
1681 struct remote *remote;
1682 struct string_list *ref_names;
1683 struct ref **stale_refs_tail;
1686 static int get_stale_heads_cb(const char *refname,
1687 const unsigned char *sha1, int flags, void *cb_data)
1689 struct stale_heads_info *info = cb_data;
1690 struct refspec refspec;
1691 memset(&refspec, 0, sizeof(refspec));
1692 refspec.dst = (char *)refname;
1693 if (!remote_find_tracking(info->remote, &refspec)) {
1694 if (!((flags & REF_ISSYMREF) ||
1695 string_list_has_string(info->ref_names, refspec.src))) {
1696 struct ref *ref = make_linked_ref(refname, &info->stale_refs_tail);
1697 hashcpy(ref->new_sha1, sha1);
1700 return 0;
1703 struct ref *get_stale_heads(struct remote *remote, struct ref *fetch_map)
1705 struct ref *ref, *stale_refs = NULL;
1706 struct string_list ref_names = { NULL, 0, 0, 0 };
1707 struct stale_heads_info info;
1708 info.remote = remote;
1709 info.ref_names = &ref_names;
1710 info.stale_refs_tail = &stale_refs;
1711 for (ref = fetch_map; ref; ref = ref->next)
1712 string_list_append(ref->name, &ref_names);
1713 sort_string_list(&ref_names);
1714 for_each_ref(get_stale_heads_cb, &info);
1715 string_list_clear(&ref_names, 0);
1716 return stale_refs;