Revert "compat: add strtok_r()"
[git/mingw.git] / remote.c
blobe53a6eb7769e2884f77819c73423c31e49b0114e
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"
10 #include "mergesort.h"
12 enum map_direction { FROM_SRC, FROM_DST };
14 static struct refspec s_tag_refspec = {
18 "refs/tags/*",
19 "refs/tags/*"
22 const struct refspec *tag_refspec = &s_tag_refspec;
24 struct counted_string {
25 size_t len;
26 const char *s;
28 struct rewrite {
29 const char *base;
30 size_t baselen;
31 struct counted_string *instead_of;
32 int instead_of_nr;
33 int instead_of_alloc;
35 struct rewrites {
36 struct rewrite **rewrite;
37 int rewrite_alloc;
38 int rewrite_nr;
41 static struct remote **remotes;
42 static int remotes_alloc;
43 static int remotes_nr;
45 static struct branch **branches;
46 static int branches_alloc;
47 static int branches_nr;
49 static struct branch *current_branch;
50 static const char *default_remote_name;
51 static int explicit_default_remote_name;
53 static struct rewrites rewrites;
54 static struct rewrites rewrites_push;
56 #define BUF_SIZE (2048)
57 static char buffer[BUF_SIZE];
59 static int valid_remote(const struct remote *remote)
61 return (!!remote->url) || (!!remote->foreign_vcs);
64 static const char *alias_url(const char *url, struct rewrites *r)
66 int i, j;
67 char *ret;
68 struct counted_string *longest;
69 int longest_i;
71 longest = NULL;
72 longest_i = -1;
73 for (i = 0; i < r->rewrite_nr; i++) {
74 if (!r->rewrite[i])
75 continue;
76 for (j = 0; j < r->rewrite[i]->instead_of_nr; j++) {
77 if (!prefixcmp(url, r->rewrite[i]->instead_of[j].s) &&
78 (!longest ||
79 longest->len < r->rewrite[i]->instead_of[j].len)) {
80 longest = &(r->rewrite[i]->instead_of[j]);
81 longest_i = i;
85 if (!longest)
86 return url;
88 ret = xmalloc(r->rewrite[longest_i]->baselen +
89 (strlen(url) - longest->len) + 1);
90 strcpy(ret, r->rewrite[longest_i]->base);
91 strcpy(ret + r->rewrite[longest_i]->baselen, url + longest->len);
92 return ret;
95 static void add_push_refspec(struct remote *remote, const char *ref)
97 ALLOC_GROW(remote->push_refspec,
98 remote->push_refspec_nr + 1,
99 remote->push_refspec_alloc);
100 remote->push_refspec[remote->push_refspec_nr++] = ref;
103 static void add_fetch_refspec(struct remote *remote, const char *ref)
105 ALLOC_GROW(remote->fetch_refspec,
106 remote->fetch_refspec_nr + 1,
107 remote->fetch_refspec_alloc);
108 remote->fetch_refspec[remote->fetch_refspec_nr++] = ref;
111 static void add_url(struct remote *remote, const char *url)
113 ALLOC_GROW(remote->url, remote->url_nr + 1, remote->url_alloc);
114 remote->url[remote->url_nr++] = url;
117 static void add_pushurl(struct remote *remote, const char *pushurl)
119 ALLOC_GROW(remote->pushurl, remote->pushurl_nr + 1, remote->pushurl_alloc);
120 remote->pushurl[remote->pushurl_nr++] = pushurl;
123 static void add_pushurl_alias(struct remote *remote, const char *url)
125 const char *pushurl = alias_url(url, &rewrites_push);
126 if (pushurl != url)
127 add_pushurl(remote, pushurl);
130 static void add_url_alias(struct remote *remote, const char *url)
132 add_url(remote, alias_url(url, &rewrites));
133 add_pushurl_alias(remote, url);
136 static struct remote *make_remote(const char *name, int len)
138 struct remote *ret;
139 int i;
141 for (i = 0; i < remotes_nr; i++) {
142 if (len ? (!strncmp(name, remotes[i]->name, len) &&
143 !remotes[i]->name[len]) :
144 !strcmp(name, remotes[i]->name))
145 return remotes[i];
148 ret = xcalloc(1, sizeof(struct remote));
149 ALLOC_GROW(remotes, remotes_nr + 1, remotes_alloc);
150 remotes[remotes_nr++] = ret;
151 if (len)
152 ret->name = xstrndup(name, len);
153 else
154 ret->name = xstrdup(name);
155 return ret;
158 static void add_merge(struct branch *branch, const char *name)
160 ALLOC_GROW(branch->merge_name, branch->merge_nr + 1,
161 branch->merge_alloc);
162 branch->merge_name[branch->merge_nr++] = name;
165 static struct branch *make_branch(const char *name, int len)
167 struct branch *ret;
168 int i;
169 char *refname;
171 for (i = 0; i < branches_nr; i++) {
172 if (len ? (!strncmp(name, branches[i]->name, len) &&
173 !branches[i]->name[len]) :
174 !strcmp(name, branches[i]->name))
175 return branches[i];
178 ALLOC_GROW(branches, branches_nr + 1, branches_alloc);
179 ret = xcalloc(1, sizeof(struct branch));
180 branches[branches_nr++] = ret;
181 if (len)
182 ret->name = xstrndup(name, len);
183 else
184 ret->name = xstrdup(name);
185 refname = xmalloc(strlen(name) + strlen("refs/heads/") + 1);
186 strcpy(refname, "refs/heads/");
187 strcpy(refname + strlen("refs/heads/"), ret->name);
188 ret->refname = refname;
190 return ret;
193 static struct rewrite *make_rewrite(struct rewrites *r, const char *base, int len)
195 struct rewrite *ret;
196 int i;
198 for (i = 0; i < r->rewrite_nr; i++) {
199 if (len
200 ? (len == r->rewrite[i]->baselen &&
201 !strncmp(base, r->rewrite[i]->base, len))
202 : !strcmp(base, r->rewrite[i]->base))
203 return r->rewrite[i];
206 ALLOC_GROW(r->rewrite, r->rewrite_nr + 1, r->rewrite_alloc);
207 ret = xcalloc(1, sizeof(struct rewrite));
208 r->rewrite[r->rewrite_nr++] = ret;
209 if (len) {
210 ret->base = xstrndup(base, len);
211 ret->baselen = len;
213 else {
214 ret->base = xstrdup(base);
215 ret->baselen = strlen(base);
217 return ret;
220 static void add_instead_of(struct rewrite *rewrite, const char *instead_of)
222 ALLOC_GROW(rewrite->instead_of, rewrite->instead_of_nr + 1, rewrite->instead_of_alloc);
223 rewrite->instead_of[rewrite->instead_of_nr].s = instead_of;
224 rewrite->instead_of[rewrite->instead_of_nr].len = strlen(instead_of);
225 rewrite->instead_of_nr++;
228 static void read_remotes_file(struct remote *remote)
230 FILE *f = fopen(git_path("remotes/%s", remote->name), "r");
232 if (!f)
233 return;
234 remote->origin = REMOTE_REMOTES;
235 while (fgets(buffer, BUF_SIZE, f)) {
236 int value_list;
237 char *s, *p;
239 if (!prefixcmp(buffer, "URL:")) {
240 value_list = 0;
241 s = buffer + 4;
242 } else if (!prefixcmp(buffer, "Push:")) {
243 value_list = 1;
244 s = buffer + 5;
245 } else if (!prefixcmp(buffer, "Pull:")) {
246 value_list = 2;
247 s = buffer + 5;
248 } else
249 continue;
251 while (isspace(*s))
252 s++;
253 if (!*s)
254 continue;
256 p = s + strlen(s);
257 while (isspace(p[-1]))
258 *--p = 0;
260 switch (value_list) {
261 case 0:
262 add_url_alias(remote, xstrdup(s));
263 break;
264 case 1:
265 add_push_refspec(remote, xstrdup(s));
266 break;
267 case 2:
268 add_fetch_refspec(remote, xstrdup(s));
269 break;
272 fclose(f);
275 static void read_branches_file(struct remote *remote)
277 const char *slash = strchr(remote->name, '/');
278 char *frag;
279 struct strbuf branch = STRBUF_INIT;
280 int n = slash ? slash - remote->name : 1000;
281 FILE *f = fopen(git_path("branches/%.*s", n, remote->name), "r");
282 char *s, *p;
283 int len;
285 if (!f)
286 return;
287 s = fgets(buffer, BUF_SIZE, f);
288 fclose(f);
289 if (!s)
290 return;
291 while (isspace(*s))
292 s++;
293 if (!*s)
294 return;
295 remote->origin = REMOTE_BRANCHES;
296 p = s + strlen(s);
297 while (isspace(p[-1]))
298 *--p = 0;
299 len = p - s;
300 if (slash)
301 len += strlen(slash);
302 p = xmalloc(len + 1);
303 strcpy(p, s);
304 if (slash)
305 strcat(p, slash);
308 * With "slash", e.g. "git fetch jgarzik/netdev-2.6" when
309 * reading from $GIT_DIR/branches/jgarzik fetches "HEAD" from
310 * the partial URL obtained from the branches file plus
311 * "/netdev-2.6" and does not store it in any tracking ref.
312 * #branch specifier in the file is ignored.
314 * Otherwise, the branches file would have URL and optionally
315 * #branch specified. The "master" (or specified) branch is
316 * fetched and stored in the local branch of the same name.
318 frag = strchr(p, '#');
319 if (frag) {
320 *(frag++) = '\0';
321 strbuf_addf(&branch, "refs/heads/%s", frag);
322 } else
323 strbuf_addstr(&branch, "refs/heads/master");
324 if (!slash) {
325 strbuf_addf(&branch, ":refs/heads/%s", remote->name);
326 } else {
327 strbuf_reset(&branch);
328 strbuf_addstr(&branch, "HEAD:");
330 add_url_alias(remote, p);
331 add_fetch_refspec(remote, strbuf_detach(&branch, NULL));
333 * Cogito compatible push: push current HEAD to remote #branch
334 * (master if missing)
336 strbuf_init(&branch, 0);
337 strbuf_addstr(&branch, "HEAD");
338 if (frag)
339 strbuf_addf(&branch, ":refs/heads/%s", frag);
340 else
341 strbuf_addstr(&branch, ":refs/heads/master");
342 add_push_refspec(remote, strbuf_detach(&branch, NULL));
343 remote->fetch_tags = 1; /* always auto-follow */
346 static int handle_config(const char *key, const char *value, void *cb)
348 const char *name;
349 const char *subkey;
350 struct remote *remote;
351 struct branch *branch;
352 if (!prefixcmp(key, "branch.")) {
353 name = key + 7;
354 subkey = strrchr(name, '.');
355 if (!subkey)
356 return 0;
357 branch = make_branch(name, subkey - name);
358 if (!strcmp(subkey, ".remote")) {
359 if (!value)
360 return config_error_nonbool(key);
361 branch->remote_name = xstrdup(value);
362 if (branch == current_branch) {
363 default_remote_name = branch->remote_name;
364 explicit_default_remote_name = 1;
366 } else if (!strcmp(subkey, ".merge")) {
367 if (!value)
368 return config_error_nonbool(key);
369 add_merge(branch, xstrdup(value));
371 return 0;
373 if (!prefixcmp(key, "url.")) {
374 struct rewrite *rewrite;
375 name = key + 4;
376 subkey = strrchr(name, '.');
377 if (!subkey)
378 return 0;
379 if (!strcmp(subkey, ".insteadof")) {
380 rewrite = make_rewrite(&rewrites, name, subkey - name);
381 if (!value)
382 return config_error_nonbool(key);
383 add_instead_of(rewrite, xstrdup(value));
384 } else if (!strcmp(subkey, ".pushinsteadof")) {
385 rewrite = make_rewrite(&rewrites_push, name, subkey - name);
386 if (!value)
387 return config_error_nonbool(key);
388 add_instead_of(rewrite, xstrdup(value));
391 if (prefixcmp(key, "remote."))
392 return 0;
393 name = key + 7;
394 if (*name == '/') {
395 warning("Config remote shorthand cannot begin with '/': %s",
396 name);
397 return 0;
399 subkey = strrchr(name, '.');
400 if (!subkey)
401 return 0;
402 remote = make_remote(name, subkey - name);
403 remote->origin = REMOTE_CONFIG;
404 if (!strcmp(subkey, ".mirror"))
405 remote->mirror = git_config_bool(key, value);
406 else if (!strcmp(subkey, ".skipdefaultupdate"))
407 remote->skip_default_update = git_config_bool(key, value);
408 else if (!strcmp(subkey, ".skipfetchall"))
409 remote->skip_default_update = git_config_bool(key, value);
410 else if (!strcmp(subkey, ".url")) {
411 const char *v;
412 if (git_config_string(&v, key, value))
413 return -1;
414 add_url(remote, v);
415 } else if (!strcmp(subkey, ".pushurl")) {
416 const char *v;
417 if (git_config_string(&v, key, value))
418 return -1;
419 add_pushurl(remote, v);
420 } else if (!strcmp(subkey, ".push")) {
421 const char *v;
422 if (git_config_string(&v, key, value))
423 return -1;
424 add_push_refspec(remote, v);
425 } else if (!strcmp(subkey, ".fetch")) {
426 const char *v;
427 if (git_config_string(&v, key, value))
428 return -1;
429 add_fetch_refspec(remote, v);
430 } else if (!strcmp(subkey, ".receivepack")) {
431 const char *v;
432 if (git_config_string(&v, key, value))
433 return -1;
434 if (!remote->receivepack)
435 remote->receivepack = v;
436 else
437 error("more than one receivepack given, using the first");
438 } else if (!strcmp(subkey, ".uploadpack")) {
439 const char *v;
440 if (git_config_string(&v, key, value))
441 return -1;
442 if (!remote->uploadpack)
443 remote->uploadpack = v;
444 else
445 error("more than one uploadpack given, using the first");
446 } else if (!strcmp(subkey, ".tagopt")) {
447 if (!strcmp(value, "--no-tags"))
448 remote->fetch_tags = -1;
449 else if (!strcmp(value, "--tags"))
450 remote->fetch_tags = 2;
451 } else if (!strcmp(subkey, ".proxy")) {
452 return git_config_string((const char **)&remote->http_proxy,
453 key, value);
454 } else if (!strcmp(subkey, ".vcs")) {
455 return git_config_string(&remote->foreign_vcs, key, value);
457 return 0;
460 static void alias_all_urls(void)
462 int i, j;
463 for (i = 0; i < remotes_nr; i++) {
464 int add_pushurl_aliases;
465 if (!remotes[i])
466 continue;
467 for (j = 0; j < remotes[i]->pushurl_nr; j++) {
468 remotes[i]->pushurl[j] = alias_url(remotes[i]->pushurl[j], &rewrites);
470 add_pushurl_aliases = remotes[i]->pushurl_nr == 0;
471 for (j = 0; j < remotes[i]->url_nr; j++) {
472 if (add_pushurl_aliases)
473 add_pushurl_alias(remotes[i], remotes[i]->url[j]);
474 remotes[i]->url[j] = alias_url(remotes[i]->url[j], &rewrites);
479 static void read_config(void)
481 unsigned char sha1[20];
482 const char *head_ref;
483 int flag;
484 if (default_remote_name) /* did this already */
485 return;
486 default_remote_name = xstrdup("origin");
487 current_branch = NULL;
488 head_ref = resolve_ref_unsafe("HEAD", sha1, 0, &flag);
489 if (head_ref && (flag & REF_ISSYMREF) &&
490 !prefixcmp(head_ref, "refs/heads/")) {
491 current_branch =
492 make_branch(head_ref + strlen("refs/heads/"), 0);
494 git_config(handle_config, NULL);
495 alias_all_urls();
499 * This function frees a refspec array.
500 * Warning: code paths should be checked to ensure that the src
501 * and dst pointers are always freeable pointers as well
502 * as the refspec pointer itself.
504 static void free_refspecs(struct refspec *refspec, int nr_refspec)
506 int i;
508 if (!refspec)
509 return;
511 for (i = 0; i < nr_refspec; i++) {
512 free(refspec[i].src);
513 free(refspec[i].dst);
515 free(refspec);
518 static struct refspec *parse_refspec_internal(int nr_refspec, const char **refspec, int fetch, int verify)
520 int i;
521 struct refspec *rs = xcalloc(sizeof(*rs), nr_refspec);
523 for (i = 0; i < nr_refspec; i++) {
524 size_t llen;
525 int is_glob;
526 const char *lhs, *rhs;
527 int flags;
529 is_glob = 0;
531 lhs = refspec[i];
532 if (*lhs == '+') {
533 rs[i].force = 1;
534 lhs++;
537 rhs = strrchr(lhs, ':');
540 * Before going on, special case ":" (or "+:") as a refspec
541 * for matching refs.
543 if (!fetch && rhs == lhs && rhs[1] == '\0') {
544 rs[i].matching = 1;
545 continue;
548 if (rhs) {
549 size_t rlen = strlen(++rhs);
550 is_glob = (1 <= rlen && strchr(rhs, '*'));
551 rs[i].dst = xstrndup(rhs, rlen);
554 llen = (rhs ? (rhs - lhs - 1) : strlen(lhs));
555 if (1 <= llen && memchr(lhs, '*', llen)) {
556 if ((rhs && !is_glob) || (!rhs && fetch))
557 goto invalid;
558 is_glob = 1;
559 } else if (rhs && is_glob) {
560 goto invalid;
563 rs[i].pattern = is_glob;
564 rs[i].src = xstrndup(lhs, llen);
565 flags = REFNAME_ALLOW_ONELEVEL | (is_glob ? REFNAME_REFSPEC_PATTERN : 0);
567 if (fetch) {
569 * LHS
570 * - empty is allowed; it means HEAD.
571 * - otherwise it must be a valid looking ref.
573 if (!*rs[i].src)
574 ; /* empty is ok */
575 else if (check_refname_format(rs[i].src, flags))
576 goto invalid;
578 * RHS
579 * - missing is ok, and is same as empty.
580 * - empty is ok; it means not to store.
581 * - otherwise it must be a valid looking ref.
583 if (!rs[i].dst)
584 ; /* ok */
585 else if (!*rs[i].dst)
586 ; /* ok */
587 else if (check_refname_format(rs[i].dst, flags))
588 goto invalid;
589 } else {
591 * LHS
592 * - empty is allowed; it means delete.
593 * - when wildcarded, it must be a valid looking ref.
594 * - otherwise, it must be an extended SHA-1, but
595 * there is no existing way to validate this.
597 if (!*rs[i].src)
598 ; /* empty is ok */
599 else if (is_glob) {
600 if (check_refname_format(rs[i].src, flags))
601 goto invalid;
603 else
604 ; /* anything goes, for now */
606 * RHS
607 * - missing is allowed, but LHS then must be a
608 * valid looking ref.
609 * - empty is not allowed.
610 * - otherwise it must be a valid looking ref.
612 if (!rs[i].dst) {
613 if (check_refname_format(rs[i].src, flags))
614 goto invalid;
615 } else if (!*rs[i].dst) {
616 goto invalid;
617 } else {
618 if (check_refname_format(rs[i].dst, flags))
619 goto invalid;
623 return rs;
625 invalid:
626 if (verify) {
628 * nr_refspec must be greater than zero and i must be valid
629 * since it is only possible to reach this point from within
630 * the for loop above.
632 free_refspecs(rs, i+1);
633 return NULL;
635 die("Invalid refspec '%s'", refspec[i]);
638 int valid_fetch_refspec(const char *fetch_refspec_str)
640 struct refspec *refspec;
642 refspec = parse_refspec_internal(1, &fetch_refspec_str, 1, 1);
643 free_refspecs(refspec, 1);
644 return !!refspec;
647 struct refspec *parse_fetch_refspec(int nr_refspec, const char **refspec)
649 return parse_refspec_internal(nr_refspec, refspec, 1, 0);
652 static struct refspec *parse_push_refspec(int nr_refspec, const char **refspec)
654 return parse_refspec_internal(nr_refspec, refspec, 0, 0);
657 void free_refspec(int nr_refspec, struct refspec *refspec)
659 int i;
660 for (i = 0; i < nr_refspec; i++) {
661 free(refspec[i].src);
662 free(refspec[i].dst);
664 free(refspec);
667 static int valid_remote_nick(const char *name)
669 if (!name[0] || is_dot_or_dotdot(name))
670 return 0;
671 return !strchr(name, '/'); /* no slash */
674 struct remote *remote_get(const char *name)
676 struct remote *ret;
677 int name_given = 0;
679 read_config();
680 if (name)
681 name_given = 1;
682 else {
683 name = default_remote_name;
684 name_given = explicit_default_remote_name;
687 ret = make_remote(name, 0);
688 if (valid_remote_nick(name)) {
689 if (!valid_remote(ret))
690 read_remotes_file(ret);
691 if (!valid_remote(ret))
692 read_branches_file(ret);
694 if (name_given && !valid_remote(ret))
695 add_url_alias(ret, name);
696 if (!valid_remote(ret))
697 return NULL;
698 ret->fetch = parse_fetch_refspec(ret->fetch_refspec_nr, ret->fetch_refspec);
699 ret->push = parse_push_refspec(ret->push_refspec_nr, ret->push_refspec);
700 return ret;
703 int remote_is_configured(const char *name)
705 int i;
706 read_config();
708 for (i = 0; i < remotes_nr; i++)
709 if (!strcmp(name, remotes[i]->name))
710 return 1;
711 return 0;
714 int for_each_remote(each_remote_fn fn, void *priv)
716 int i, result = 0;
717 read_config();
718 for (i = 0; i < remotes_nr && !result; i++) {
719 struct remote *r = remotes[i];
720 if (!r)
721 continue;
722 if (!r->fetch)
723 r->fetch = parse_fetch_refspec(r->fetch_refspec_nr,
724 r->fetch_refspec);
725 if (!r->push)
726 r->push = parse_push_refspec(r->push_refspec_nr,
727 r->push_refspec);
728 result = fn(r, priv);
730 return result;
733 void ref_remove_duplicates(struct ref *ref_map)
735 struct string_list refs = STRING_LIST_INIT_NODUP;
736 struct string_list_item *item = NULL;
737 struct ref *prev = NULL, *next = NULL;
738 for (; ref_map; prev = ref_map, ref_map = next) {
739 next = ref_map->next;
740 if (!ref_map->peer_ref)
741 continue;
743 item = string_list_lookup(&refs, ref_map->peer_ref->name);
744 if (item) {
745 if (strcmp(((struct ref *)item->util)->name,
746 ref_map->name))
747 die("%s tracks both %s and %s",
748 ref_map->peer_ref->name,
749 ((struct ref *)item->util)->name,
750 ref_map->name);
751 prev->next = ref_map->next;
752 free(ref_map->peer_ref);
753 free(ref_map);
754 ref_map = prev; /* skip this; we freed it */
755 continue;
758 item = string_list_insert(&refs, ref_map->peer_ref->name);
759 item->util = ref_map;
761 string_list_clear(&refs, 0);
764 int remote_has_url(struct remote *remote, const char *url)
766 int i;
767 for (i = 0; i < remote->url_nr; i++) {
768 if (!strcmp(remote->url[i], url))
769 return 1;
771 return 0;
774 static int match_name_with_pattern(const char *key, const char *name,
775 const char *value, char **result)
777 const char *kstar = strchr(key, '*');
778 size_t klen;
779 size_t ksuffixlen;
780 size_t namelen;
781 int ret;
782 if (!kstar)
783 die("Key '%s' of pattern had no '*'", key);
784 klen = kstar - key;
785 ksuffixlen = strlen(kstar + 1);
786 namelen = strlen(name);
787 ret = !strncmp(name, key, klen) && namelen >= klen + ksuffixlen &&
788 !memcmp(name + namelen - ksuffixlen, kstar + 1, ksuffixlen);
789 if (ret && value) {
790 const char *vstar = strchr(value, '*');
791 size_t vlen;
792 size_t vsuffixlen;
793 if (!vstar)
794 die("Value '%s' of pattern has no '*'", value);
795 vlen = vstar - value;
796 vsuffixlen = strlen(vstar + 1);
797 *result = xmalloc(vlen + vsuffixlen +
798 strlen(name) -
799 klen - ksuffixlen + 1);
800 strncpy(*result, value, vlen);
801 strncpy(*result + vlen,
802 name + klen, namelen - klen - ksuffixlen);
803 strcpy(*result + vlen + namelen - klen - ksuffixlen,
804 vstar + 1);
806 return ret;
809 static int query_refspecs(struct refspec *refs, int ref_count, struct refspec *query)
811 int i;
812 int find_src = !query->src;
814 if (find_src && !query->dst)
815 return error("query_refspecs: need either src or dst");
817 for (i = 0; i < ref_count; i++) {
818 struct refspec *refspec = &refs[i];
819 const char *key = find_src ? refspec->dst : refspec->src;
820 const char *value = find_src ? refspec->src : refspec->dst;
821 const char *needle = find_src ? query->dst : query->src;
822 char **result = find_src ? &query->src : &query->dst;
824 if (!refspec->dst)
825 continue;
826 if (refspec->pattern) {
827 if (match_name_with_pattern(key, needle, value, result)) {
828 query->force = refspec->force;
829 return 0;
831 } else if (!strcmp(needle, key)) {
832 *result = xstrdup(value);
833 query->force = refspec->force;
834 return 0;
837 return -1;
840 char *apply_refspecs(struct refspec *refspecs, int nr_refspec,
841 const char *name)
843 struct refspec query;
845 memset(&query, 0, sizeof(struct refspec));
846 query.src = (char *)name;
848 if (query_refspecs(refspecs, nr_refspec, &query))
849 return NULL;
851 return query.dst;
854 int remote_find_tracking(struct remote *remote, struct refspec *refspec)
856 return query_refspecs(remote->fetch, remote->fetch_refspec_nr, refspec);
859 static struct ref *alloc_ref_with_prefix(const char *prefix, size_t prefixlen,
860 const char *name)
862 size_t len = strlen(name);
863 struct ref *ref = xcalloc(1, sizeof(struct ref) + prefixlen + len + 1);
864 memcpy(ref->name, prefix, prefixlen);
865 memcpy(ref->name + prefixlen, name, len);
866 return ref;
869 struct ref *alloc_ref(const char *name)
871 return alloc_ref_with_prefix("", 0, name);
874 struct ref *copy_ref(const struct ref *ref)
876 struct ref *cpy;
877 size_t len;
878 if (!ref)
879 return NULL;
880 len = strlen(ref->name);
881 cpy = xmalloc(sizeof(struct ref) + len + 1);
882 memcpy(cpy, ref, sizeof(struct ref) + len + 1);
883 cpy->next = NULL;
884 cpy->symref = ref->symref ? xstrdup(ref->symref) : NULL;
885 cpy->remote_status = ref->remote_status ? xstrdup(ref->remote_status) : NULL;
886 cpy->peer_ref = copy_ref(ref->peer_ref);
887 return cpy;
890 struct ref *copy_ref_list(const struct ref *ref)
892 struct ref *ret = NULL;
893 struct ref **tail = &ret;
894 while (ref) {
895 *tail = copy_ref(ref);
896 ref = ref->next;
897 tail = &((*tail)->next);
899 return ret;
902 static void free_ref(struct ref *ref)
904 if (!ref)
905 return;
906 free_ref(ref->peer_ref);
907 free(ref->remote_status);
908 free(ref->symref);
909 free(ref);
912 void free_refs(struct ref *ref)
914 struct ref *next;
915 while (ref) {
916 next = ref->next;
917 free_ref(ref);
918 ref = next;
922 int ref_compare_name(const void *va, const void *vb)
924 const struct ref *a = va, *b = vb;
925 return strcmp(a->name, b->name);
928 static void *ref_list_get_next(const void *a)
930 return ((const struct ref *)a)->next;
933 static void ref_list_set_next(void *a, void *next)
935 ((struct ref *)a)->next = next;
938 void sort_ref_list(struct ref **l, int (*cmp)(const void *, const void *))
940 *l = llist_mergesort(*l, ref_list_get_next, ref_list_set_next, cmp);
943 static int count_refspec_match(const char *pattern,
944 struct ref *refs,
945 struct ref **matched_ref)
947 int patlen = strlen(pattern);
948 struct ref *matched_weak = NULL;
949 struct ref *matched = NULL;
950 int weak_match = 0;
951 int match = 0;
953 for (weak_match = match = 0; refs; refs = refs->next) {
954 char *name = refs->name;
955 int namelen = strlen(name);
957 if (!refname_match(pattern, name, ref_rev_parse_rules))
958 continue;
960 /* A match is "weak" if it is with refs outside
961 * heads or tags, and did not specify the pattern
962 * in full (e.g. "refs/remotes/origin/master") or at
963 * least from the toplevel (e.g. "remotes/origin/master");
964 * otherwise "git push $URL master" would result in
965 * ambiguity between remotes/origin/master and heads/master
966 * at the remote site.
968 if (namelen != patlen &&
969 patlen != namelen - 5 &&
970 prefixcmp(name, "refs/heads/") &&
971 prefixcmp(name, "refs/tags/")) {
972 /* We want to catch the case where only weak
973 * matches are found and there are multiple
974 * matches, and where more than one strong
975 * matches are found, as ambiguous. One
976 * strong match with zero or more weak matches
977 * are acceptable as a unique match.
979 matched_weak = refs;
980 weak_match++;
982 else {
983 matched = refs;
984 match++;
987 if (!matched) {
988 *matched_ref = matched_weak;
989 return weak_match;
991 else {
992 *matched_ref = matched;
993 return match;
997 static void tail_link_ref(struct ref *ref, struct ref ***tail)
999 **tail = ref;
1000 while (ref->next)
1001 ref = ref->next;
1002 *tail = &ref->next;
1005 static struct ref *alloc_delete_ref(void)
1007 struct ref *ref = alloc_ref("(delete)");
1008 hashclr(ref->new_sha1);
1009 return ref;
1012 static struct ref *try_explicit_object_name(const char *name)
1014 unsigned char sha1[20];
1015 struct ref *ref;
1017 if (!*name)
1018 return alloc_delete_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_unsafe(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_unsafe(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 (is_null_sha1(matched_src->new_sha1))
1104 error("unable to delete '%s': remote ref does not exist",
1105 dst_value);
1106 else if ((dst_guess = guess_ref(dst_value, matched_src)))
1107 matched_dst = make_linked_ref(dst_guess, dst_tail);
1108 else
1109 error("unable to push to unqualified destination: %s\n"
1110 "The destination refspec neither matches an "
1111 "existing ref on the remote nor\n"
1112 "begins with refs/, and we are unable to "
1113 "guess a prefix based on the source ref.",
1114 dst_value);
1115 break;
1116 default:
1117 matched_dst = NULL;
1118 error("dst refspec %s matches more than one.",
1119 dst_value);
1120 break;
1122 if (!matched_dst)
1123 return -1;
1124 if (matched_dst->peer_ref)
1125 return error("dst ref %s receives from more than one src.",
1126 matched_dst->name);
1127 else {
1128 matched_dst->peer_ref = copy_src ? copy_ref(matched_src) : matched_src;
1129 matched_dst->force = rs->force;
1131 return 0;
1134 static int match_explicit_refs(struct ref *src, struct ref *dst,
1135 struct ref ***dst_tail, struct refspec *rs,
1136 int rs_nr)
1138 int i, errs;
1139 for (i = errs = 0; i < rs_nr; i++)
1140 errs += match_explicit(src, dst, dst_tail, &rs[i]);
1141 return errs;
1144 static char *get_ref_match(const struct refspec *rs, int rs_nr, const struct ref *ref,
1145 int send_mirror, int direction, const struct refspec **ret_pat)
1147 const struct refspec *pat;
1148 char *name;
1149 int i;
1150 int matching_refs = -1;
1151 for (i = 0; i < rs_nr; i++) {
1152 if (rs[i].matching &&
1153 (matching_refs == -1 || rs[i].force)) {
1154 matching_refs = i;
1155 continue;
1158 if (rs[i].pattern) {
1159 const char *dst_side = rs[i].dst ? rs[i].dst : rs[i].src;
1160 int match;
1161 if (direction == FROM_SRC)
1162 match = match_name_with_pattern(rs[i].src, ref->name, dst_side, &name);
1163 else
1164 match = match_name_with_pattern(dst_side, ref->name, rs[i].src, &name);
1165 if (match) {
1166 matching_refs = i;
1167 break;
1171 if (matching_refs == -1)
1172 return NULL;
1174 pat = rs + matching_refs;
1175 if (pat->matching) {
1177 * "matching refs"; traditionally we pushed everything
1178 * including refs outside refs/heads/ hierarchy, but
1179 * that does not make much sense these days.
1181 if (!send_mirror && prefixcmp(ref->name, "refs/heads/"))
1182 return NULL;
1183 name = xstrdup(ref->name);
1185 if (ret_pat)
1186 *ret_pat = pat;
1187 return name;
1190 static struct ref **tail_ref(struct ref **head)
1192 struct ref **tail = head;
1193 while (*tail)
1194 tail = &((*tail)->next);
1195 return tail;
1199 * Given the set of refs the local repository has, the set of refs the
1200 * remote repository has, and the refspec used for push, determine
1201 * what remote refs we will update and with what value by setting
1202 * peer_ref (which object is being pushed) and force (if the push is
1203 * forced) in elements of "dst". The function may add new elements to
1204 * dst (e.g. pushing to a new branch, done in match_explicit_refs).
1206 int match_push_refs(struct ref *src, struct ref **dst,
1207 int nr_refspec, const char **refspec, int flags)
1209 struct refspec *rs;
1210 int send_all = flags & MATCH_REFS_ALL;
1211 int send_mirror = flags & MATCH_REFS_MIRROR;
1212 int send_prune = flags & MATCH_REFS_PRUNE;
1213 int errs;
1214 static const char *default_refspec[] = { ":", NULL };
1215 struct ref *ref, **dst_tail = tail_ref(dst);
1217 if (!nr_refspec) {
1218 nr_refspec = 1;
1219 refspec = default_refspec;
1221 rs = parse_push_refspec(nr_refspec, (const char **) refspec);
1222 errs = match_explicit_refs(src, *dst, &dst_tail, rs, nr_refspec);
1224 /* pick the remainder */
1225 for (ref = src; ref; ref = ref->next) {
1226 struct ref *dst_peer;
1227 const struct refspec *pat = NULL;
1228 char *dst_name;
1230 if (ref->peer_ref)
1231 continue;
1233 dst_name = get_ref_match(rs, nr_refspec, ref, send_mirror, FROM_SRC, &pat);
1234 if (!dst_name)
1235 continue;
1237 dst_peer = find_ref_by_name(*dst, dst_name);
1238 if (dst_peer) {
1239 if (dst_peer->peer_ref)
1240 /* We're already sending something to this ref. */
1241 goto free_name;
1242 } else {
1243 if (pat->matching && !(send_all || send_mirror))
1245 * Remote doesn't have it, and we have no
1246 * explicit pattern, and we don't have
1247 * --all nor --mirror.
1249 goto free_name;
1251 /* Create a new one and link it */
1252 dst_peer = make_linked_ref(dst_name, &dst_tail);
1253 hashcpy(dst_peer->new_sha1, ref->new_sha1);
1255 dst_peer->peer_ref = copy_ref(ref);
1256 dst_peer->force = pat->force;
1257 free_name:
1258 free(dst_name);
1260 if (send_prune) {
1261 /* check for missing refs on the remote */
1262 for (ref = *dst; ref; ref = ref->next) {
1263 char *src_name;
1265 if (ref->peer_ref)
1266 /* We're already sending something to this ref. */
1267 continue;
1269 src_name = get_ref_match(rs, nr_refspec, ref, send_mirror, FROM_DST, NULL);
1270 if (src_name) {
1271 if (!find_ref_by_name(src, src_name))
1272 ref->peer_ref = alloc_delete_ref();
1273 free(src_name);
1277 if (errs)
1278 return -1;
1279 return 0;
1282 void set_ref_status_for_push(struct ref *remote_refs, int send_mirror,
1283 int force_update)
1285 struct ref *ref;
1287 for (ref = remote_refs; ref; ref = ref->next) {
1288 int force_ref_update = ref->force || force_update;
1290 if (ref->peer_ref)
1291 hashcpy(ref->new_sha1, ref->peer_ref->new_sha1);
1292 else if (!send_mirror)
1293 continue;
1295 ref->deletion = is_null_sha1(ref->new_sha1);
1296 if (!ref->deletion &&
1297 !hashcmp(ref->old_sha1, ref->new_sha1)) {
1298 ref->status = REF_STATUS_UPTODATE;
1299 continue;
1303 * Decide whether an individual refspec A:B can be
1304 * pushed. The push will succeed if any of the
1305 * following are true:
1307 * (1) the remote reference B does not exist
1309 * (2) the remote reference B is being removed (i.e.,
1310 * pushing :B where no source is specified)
1312 * (3) the destination is not under refs/tags/, and
1313 * if the old and new value is a commit, the new
1314 * is a descendant of the old.
1316 * (4) it is forced using the +A:B notation, or by
1317 * passing the --force argument
1320 if (!ref->deletion && !is_null_sha1(ref->old_sha1)) {
1321 int why = 0; /* why would this push require --force? */
1323 if (!prefixcmp(ref->name, "refs/tags/"))
1324 why = REF_STATUS_REJECT_ALREADY_EXISTS;
1325 else if (!has_sha1_file(ref->old_sha1))
1326 why = REF_STATUS_REJECT_FETCH_FIRST;
1327 else if (!lookup_commit_reference_gently(ref->old_sha1, 1) ||
1328 !lookup_commit_reference_gently(ref->new_sha1, 1))
1329 why = REF_STATUS_REJECT_NEEDS_FORCE;
1330 else if (!ref_newer(ref->new_sha1, ref->old_sha1))
1331 why = REF_STATUS_REJECT_NONFASTFORWARD;
1333 if (!force_ref_update)
1334 ref->status = why;
1335 else if (why)
1336 ref->forced_update = 1;
1341 struct branch *branch_get(const char *name)
1343 struct branch *ret;
1345 read_config();
1346 if (!name || !*name || !strcmp(name, "HEAD"))
1347 ret = current_branch;
1348 else
1349 ret = make_branch(name, 0);
1350 if (ret && ret->remote_name) {
1351 ret->remote = remote_get(ret->remote_name);
1352 if (ret->merge_nr) {
1353 int i;
1354 ret->merge = xcalloc(sizeof(*ret->merge),
1355 ret->merge_nr);
1356 for (i = 0; i < ret->merge_nr; i++) {
1357 ret->merge[i] = xcalloc(1, sizeof(**ret->merge));
1358 ret->merge[i]->src = xstrdup(ret->merge_name[i]);
1359 if (remote_find_tracking(ret->remote, ret->merge[i])
1360 && !strcmp(ret->remote_name, "."))
1361 ret->merge[i]->dst = xstrdup(ret->merge_name[i]);
1365 return ret;
1368 int branch_has_merge_config(struct branch *branch)
1370 return branch && !!branch->merge;
1373 int branch_merge_matches(struct branch *branch,
1374 int i,
1375 const char *refname)
1377 if (!branch || i < 0 || i >= branch->merge_nr)
1378 return 0;
1379 return refname_match(branch->merge[i]->src, refname, ref_fetch_rules);
1382 static int ignore_symref_update(const char *refname)
1384 unsigned char sha1[20];
1385 int flag;
1387 if (!resolve_ref_unsafe(refname, sha1, 0, &flag))
1388 return 0; /* non-existing refs are OK */
1389 return (flag & REF_ISSYMREF);
1392 static struct ref *get_expanded_map(const struct ref *remote_refs,
1393 const struct refspec *refspec)
1395 const struct ref *ref;
1396 struct ref *ret = NULL;
1397 struct ref **tail = &ret;
1399 char *expn_name;
1401 for (ref = remote_refs; ref; ref = ref->next) {
1402 if (strchr(ref->name, '^'))
1403 continue; /* a dereference item */
1404 if (match_name_with_pattern(refspec->src, ref->name,
1405 refspec->dst, &expn_name) &&
1406 !ignore_symref_update(expn_name)) {
1407 struct ref *cpy = copy_ref(ref);
1409 cpy->peer_ref = alloc_ref(expn_name);
1410 free(expn_name);
1411 if (refspec->force)
1412 cpy->peer_ref->force = 1;
1413 *tail = cpy;
1414 tail = &cpy->next;
1418 return ret;
1421 static const struct ref *find_ref_by_name_abbrev(const struct ref *refs, const char *name)
1423 const struct ref *ref;
1424 for (ref = refs; ref; ref = ref->next) {
1425 if (refname_match(name, ref->name, ref_fetch_rules))
1426 return ref;
1428 return NULL;
1431 struct ref *get_remote_ref(const struct ref *remote_refs, const char *name)
1433 const struct ref *ref = find_ref_by_name_abbrev(remote_refs, name);
1435 if (!ref)
1436 return NULL;
1438 return copy_ref(ref);
1441 static struct ref *get_local_ref(const char *name)
1443 if (!name || name[0] == '\0')
1444 return NULL;
1446 if (!prefixcmp(name, "refs/"))
1447 return alloc_ref(name);
1449 if (!prefixcmp(name, "heads/") ||
1450 !prefixcmp(name, "tags/") ||
1451 !prefixcmp(name, "remotes/"))
1452 return alloc_ref_with_prefix("refs/", 5, name);
1454 return alloc_ref_with_prefix("refs/heads/", 11, name);
1457 int get_fetch_map(const struct ref *remote_refs,
1458 const struct refspec *refspec,
1459 struct ref ***tail,
1460 int missing_ok)
1462 struct ref *ref_map, **rmp;
1464 if (refspec->pattern) {
1465 ref_map = get_expanded_map(remote_refs, refspec);
1466 } else {
1467 const char *name = refspec->src[0] ? refspec->src : "HEAD";
1469 ref_map = get_remote_ref(remote_refs, name);
1470 if (!missing_ok && !ref_map)
1471 die("Couldn't find remote ref %s", name);
1472 if (ref_map) {
1473 ref_map->peer_ref = get_local_ref(refspec->dst);
1474 if (ref_map->peer_ref && refspec->force)
1475 ref_map->peer_ref->force = 1;
1479 for (rmp = &ref_map; *rmp; ) {
1480 if ((*rmp)->peer_ref) {
1481 if (prefixcmp((*rmp)->peer_ref->name, "refs/") ||
1482 check_refname_format((*rmp)->peer_ref->name, 0)) {
1483 struct ref *ignore = *rmp;
1484 error("* Ignoring funny ref '%s' locally",
1485 (*rmp)->peer_ref->name);
1486 *rmp = (*rmp)->next;
1487 free(ignore->peer_ref);
1488 free(ignore);
1489 continue;
1492 rmp = &((*rmp)->next);
1495 if (ref_map)
1496 tail_link_ref(ref_map, tail);
1498 return 0;
1501 int resolve_remote_symref(struct ref *ref, struct ref *list)
1503 if (!ref->symref)
1504 return 0;
1505 for (; list; list = list->next)
1506 if (!strcmp(ref->symref, list->name)) {
1507 hashcpy(ref->old_sha1, list->old_sha1);
1508 return 0;
1510 return 1;
1513 static void unmark_and_free(struct commit_list *list, unsigned int mark)
1515 while (list) {
1516 struct commit_list *temp = list;
1517 temp->item->object.flags &= ~mark;
1518 list = temp->next;
1519 free(temp);
1523 int ref_newer(const unsigned char *new_sha1, const unsigned char *old_sha1)
1525 struct object *o;
1526 struct commit *old, *new;
1527 struct commit_list *list, *used;
1528 int found = 0;
1531 * Both new and old must be commit-ish and new is descendant of
1532 * old. Otherwise we require --force.
1534 o = deref_tag(parse_object(old_sha1), NULL, 0);
1535 if (!o || o->type != OBJ_COMMIT)
1536 return 0;
1537 old = (struct commit *) o;
1539 o = deref_tag(parse_object(new_sha1), NULL, 0);
1540 if (!o || o->type != OBJ_COMMIT)
1541 return 0;
1542 new = (struct commit *) o;
1544 if (parse_commit(new) < 0)
1545 return 0;
1547 used = list = NULL;
1548 commit_list_insert(new, &list);
1549 while (list) {
1550 new = pop_most_recent_commit(&list, TMP_MARK);
1551 commit_list_insert(new, &used);
1552 if (new == old) {
1553 found = 1;
1554 break;
1557 unmark_and_free(list, TMP_MARK);
1558 unmark_and_free(used, TMP_MARK);
1559 return found;
1563 * Return true if there is anything to report, otherwise false.
1565 int stat_tracking_info(struct branch *branch, int *num_ours, int *num_theirs)
1567 unsigned char sha1[20];
1568 struct commit *ours, *theirs;
1569 char symmetric[84];
1570 struct rev_info revs;
1571 const char *rev_argv[10], *base;
1572 int rev_argc;
1575 * Nothing to report unless we are marked to build on top of
1576 * somebody else.
1578 if (!branch ||
1579 !branch->merge || !branch->merge[0] || !branch->merge[0]->dst)
1580 return 0;
1583 * If what we used to build on no longer exists, there is
1584 * nothing to report.
1586 base = branch->merge[0]->dst;
1587 if (read_ref(base, sha1))
1588 return 0;
1589 theirs = lookup_commit_reference(sha1);
1590 if (!theirs)
1591 return 0;
1593 if (read_ref(branch->refname, sha1))
1594 return 0;
1595 ours = lookup_commit_reference(sha1);
1596 if (!ours)
1597 return 0;
1599 /* are we the same? */
1600 if (theirs == ours)
1601 return 0;
1603 /* Run "rev-list --left-right ours...theirs" internally... */
1604 rev_argc = 0;
1605 rev_argv[rev_argc++] = NULL;
1606 rev_argv[rev_argc++] = "--left-right";
1607 rev_argv[rev_argc++] = symmetric;
1608 rev_argv[rev_argc++] = "--";
1609 rev_argv[rev_argc] = NULL;
1611 strcpy(symmetric, sha1_to_hex(ours->object.sha1));
1612 strcpy(symmetric + 40, "...");
1613 strcpy(symmetric + 43, sha1_to_hex(theirs->object.sha1));
1615 init_revisions(&revs, NULL);
1616 setup_revisions(rev_argc, rev_argv, &revs, NULL);
1617 prepare_revision_walk(&revs);
1619 /* ... and count the commits on each side. */
1620 *num_ours = 0;
1621 *num_theirs = 0;
1622 while (1) {
1623 struct commit *c = get_revision(&revs);
1624 if (!c)
1625 break;
1626 if (c->object.flags & SYMMETRIC_LEFT)
1627 (*num_ours)++;
1628 else
1629 (*num_theirs)++;
1632 /* clear object flags smudged by the above traversal */
1633 clear_commit_marks(ours, ALL_REV_FLAGS);
1634 clear_commit_marks(theirs, ALL_REV_FLAGS);
1635 return 1;
1639 * Return true when there is anything to report, otherwise false.
1641 int format_tracking_info(struct branch *branch, struct strbuf *sb)
1643 int num_ours, num_theirs;
1644 const char *base;
1646 if (!stat_tracking_info(branch, &num_ours, &num_theirs))
1647 return 0;
1649 base = branch->merge[0]->dst;
1650 base = shorten_unambiguous_ref(base, 0);
1651 if (!num_theirs) {
1652 strbuf_addf(sb,
1653 Q_("Your branch is ahead of '%s' by %d commit.\n",
1654 "Your branch is ahead of '%s' by %d commits.\n",
1655 num_ours),
1656 base, num_ours);
1657 if (advice_status_hints)
1658 strbuf_addf(sb,
1659 _(" (use \"git push\" to publish your local commits)\n"));
1660 } else if (!num_ours) {
1661 strbuf_addf(sb,
1662 Q_("Your branch is behind '%s' by %d commit, "
1663 "and can be fast-forwarded.\n",
1664 "Your branch is behind '%s' by %d commits, "
1665 "and can be fast-forwarded.\n",
1666 num_theirs),
1667 base, num_theirs);
1668 if (advice_status_hints)
1669 strbuf_addf(sb,
1670 _(" (use \"git pull\" to update your local branch)\n"));
1671 } else {
1672 strbuf_addf(sb,
1673 Q_("Your branch and '%s' have diverged,\n"
1674 "and have %d and %d different commit each, "
1675 "respectively.\n",
1676 "Your branch and '%s' have diverged,\n"
1677 "and have %d and %d different commits each, "
1678 "respectively.\n",
1679 num_theirs),
1680 base, num_ours, num_theirs);
1681 if (advice_status_hints)
1682 strbuf_addf(sb,
1683 _(" (use \"git pull\" to merge the remote branch into yours)\n"));
1685 return 1;
1688 static int one_local_ref(const char *refname, const unsigned char *sha1, int flag, void *cb_data)
1690 struct ref ***local_tail = cb_data;
1691 struct ref *ref;
1692 int len;
1694 /* we already know it starts with refs/ to get here */
1695 if (check_refname_format(refname + 5, 0))
1696 return 0;
1698 len = strlen(refname) + 1;
1699 ref = xcalloc(1, sizeof(*ref) + len);
1700 hashcpy(ref->new_sha1, sha1);
1701 memcpy(ref->name, refname, len);
1702 **local_tail = ref;
1703 *local_tail = &ref->next;
1704 return 0;
1707 struct ref *get_local_heads(void)
1709 struct ref *local_refs = NULL, **local_tail = &local_refs;
1710 for_each_ref(one_local_ref, &local_tail);
1711 return local_refs;
1714 struct ref *guess_remote_head(const struct ref *head,
1715 const struct ref *refs,
1716 int all)
1718 const struct ref *r;
1719 struct ref *list = NULL;
1720 struct ref **tail = &list;
1722 if (!head)
1723 return NULL;
1726 * Some transports support directly peeking at
1727 * where HEAD points; if that is the case, then
1728 * we don't have to guess.
1730 if (head->symref)
1731 return copy_ref(find_ref_by_name(refs, head->symref));
1733 /* If refs/heads/master could be right, it is. */
1734 if (!all) {
1735 r = find_ref_by_name(refs, "refs/heads/master");
1736 if (r && !hashcmp(r->old_sha1, head->old_sha1))
1737 return copy_ref(r);
1740 /* Look for another ref that points there */
1741 for (r = refs; r; r = r->next) {
1742 if (r != head &&
1743 !prefixcmp(r->name, "refs/heads/") &&
1744 !hashcmp(r->old_sha1, head->old_sha1)) {
1745 *tail = copy_ref(r);
1746 tail = &((*tail)->next);
1747 if (!all)
1748 break;
1752 return list;
1755 struct stale_heads_info {
1756 struct string_list *ref_names;
1757 struct ref **stale_refs_tail;
1758 struct refspec *refs;
1759 int ref_count;
1762 static int get_stale_heads_cb(const char *refname,
1763 const unsigned char *sha1, int flags, void *cb_data)
1765 struct stale_heads_info *info = cb_data;
1766 struct refspec query;
1767 memset(&query, 0, sizeof(struct refspec));
1768 query.dst = (char *)refname;
1770 if (query_refspecs(info->refs, info->ref_count, &query))
1771 return 0; /* No matches */
1774 * If we did find a suitable refspec and it's not a symref and
1775 * it's not in the list of refs that currently exist in that
1776 * remote we consider it to be stale.
1778 if (!((flags & REF_ISSYMREF) ||
1779 string_list_has_string(info->ref_names, query.src))) {
1780 struct ref *ref = make_linked_ref(refname, &info->stale_refs_tail);
1781 hashcpy(ref->new_sha1, sha1);
1784 free(query.src);
1785 return 0;
1788 struct ref *get_stale_heads(struct refspec *refs, int ref_count, struct ref *fetch_map)
1790 struct ref *ref, *stale_refs = NULL;
1791 struct string_list ref_names = STRING_LIST_INIT_NODUP;
1792 struct stale_heads_info info;
1793 info.ref_names = &ref_names;
1794 info.stale_refs_tail = &stale_refs;
1795 info.refs = refs;
1796 info.ref_count = ref_count;
1797 for (ref = fetch_map; ref; ref = ref->next)
1798 string_list_append(&ref_names, ref->name);
1799 sort_string_list(&ref_names);
1800 for_each_ref(get_stale_heads_cb, &info);
1801 string_list_clear(&ref_names, 0);
1802 return stale_refs;