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remote: convert apply_refspecs to take a struct refspec
[thirdparty/git.git] / remote.c
1 #include "cache.h"
2 #include "config.h"
3 #include "remote.h"
4 #include "refs.h"
5 #include "refspec.h"
6 #include "commit.h"
7 #include "diff.h"
8 #include "revision.h"
9 #include "dir.h"
10 #include "tag.h"
11 #include "string-list.h"
12 #include "mergesort.h"
13 #include "argv-array.h"
14
15 enum map_direction { FROM_SRC, FROM_DST };
16
17 struct counted_string {
18 size_t len;
19 const char *s;
20 };
21 struct rewrite {
22 const char *base;
23 size_t baselen;
24 struct counted_string *instead_of;
25 int instead_of_nr;
26 int instead_of_alloc;
27 };
28 struct rewrites {
29 struct rewrite **rewrite;
30 int rewrite_alloc;
31 int rewrite_nr;
32 };
33
34 static struct remote **remotes;
35 static int remotes_alloc;
36 static int remotes_nr;
37 static struct hashmap remotes_hash;
38
39 static struct branch **branches;
40 static int branches_alloc;
41 static int branches_nr;
42
43 static struct branch *current_branch;
44 static const char *pushremote_name;
45
46 static struct rewrites rewrites;
47 static struct rewrites rewrites_push;
48
49 static int valid_remote(const struct remote *remote)
50 {
51 return (!!remote->url) || (!!remote->foreign_vcs);
52 }
53
54 static const char *alias_url(const char *url, struct rewrites *r)
55 {
56 int i, j;
57 struct counted_string *longest;
58 int longest_i;
59
60 longest = NULL;
61 longest_i = -1;
62 for (i = 0; i < r->rewrite_nr; i++) {
63 if (!r->rewrite[i])
64 continue;
65 for (j = 0; j < r->rewrite[i]->instead_of_nr; j++) {
66 if (starts_with(url, r->rewrite[i]->instead_of[j].s) &&
67 (!longest ||
68 longest->len < r->rewrite[i]->instead_of[j].len)) {
69 longest = &(r->rewrite[i]->instead_of[j]);
70 longest_i = i;
71 }
72 }
73 }
74 if (!longest)
75 return url;
76
77 return xstrfmt("%s%s", r->rewrite[longest_i]->base, url + longest->len);
78 }
79
80 static void add_url(struct remote *remote, const char *url)
81 {
82 ALLOC_GROW(remote->url, remote->url_nr + 1, remote->url_alloc);
83 remote->url[remote->url_nr++] = url;
84 }
85
86 static void add_pushurl(struct remote *remote, const char *pushurl)
87 {
88 ALLOC_GROW(remote->pushurl, remote->pushurl_nr + 1, remote->pushurl_alloc);
89 remote->pushurl[remote->pushurl_nr++] = pushurl;
90 }
91
92 static void add_pushurl_alias(struct remote *remote, const char *url)
93 {
94 const char *pushurl = alias_url(url, &rewrites_push);
95 if (pushurl != url)
96 add_pushurl(remote, pushurl);
97 }
98
99 static void add_url_alias(struct remote *remote, const char *url)
100 {
101 add_url(remote, alias_url(url, &rewrites));
102 add_pushurl_alias(remote, url);
103 }
104
105 struct remotes_hash_key {
106 const char *str;
107 int len;
108 };
109
110 static int remotes_hash_cmp(const void *unused_cmp_data,
111 const void *entry,
112 const void *entry_or_key,
113 const void *keydata)
114 {
115 const struct remote *a = entry;
116 const struct remote *b = entry_or_key;
117 const struct remotes_hash_key *key = keydata;
118
119 if (key)
120 return strncmp(a->name, key->str, key->len) || a->name[key->len];
121 else
122 return strcmp(a->name, b->name);
123 }
124
125 static inline void init_remotes_hash(void)
126 {
127 if (!remotes_hash.cmpfn)
128 hashmap_init(&remotes_hash, remotes_hash_cmp, NULL, 0);
129 }
130
131 static struct remote *make_remote(const char *name, int len)
132 {
133 struct remote *ret, *replaced;
134 struct remotes_hash_key lookup;
135 struct hashmap_entry lookup_entry;
136
137 if (!len)
138 len = strlen(name);
139
140 init_remotes_hash();
141 lookup.str = name;
142 lookup.len = len;
143 hashmap_entry_init(&lookup_entry, memhash(name, len));
144
145 if ((ret = hashmap_get(&remotes_hash, &lookup_entry, &lookup)) != NULL)
146 return ret;
147
148 ret = xcalloc(1, sizeof(struct remote));
149 ret->prune = -1; /* unspecified */
150 ret->prune_tags = -1; /* unspecified */
151 ret->name = xstrndup(name, len);
152 refspec_init(&ret->push, REFSPEC_PUSH);
153 refspec_init(&ret->fetch, REFSPEC_FETCH);
154
155 ALLOC_GROW(remotes, remotes_nr + 1, remotes_alloc);
156 remotes[remotes_nr++] = ret;
157
158 hashmap_entry_init(ret, lookup_entry.hash);
159 replaced = hashmap_put(&remotes_hash, ret);
160 assert(replaced == NULL); /* no previous entry overwritten */
161 return ret;
162 }
163
164 static void add_merge(struct branch *branch, const char *name)
165 {
166 ALLOC_GROW(branch->merge_name, branch->merge_nr + 1,
167 branch->merge_alloc);
168 branch->merge_name[branch->merge_nr++] = name;
169 }
170
171 static struct branch *make_branch(const char *name, int len)
172 {
173 struct branch *ret;
174 int i;
175
176 for (i = 0; i < branches_nr; i++) {
177 if (len ? (!strncmp(name, branches[i]->name, len) &&
178 !branches[i]->name[len]) :
179 !strcmp(name, branches[i]->name))
180 return branches[i];
181 }
182
183 ALLOC_GROW(branches, branches_nr + 1, branches_alloc);
184 ret = xcalloc(1, sizeof(struct branch));
185 branches[branches_nr++] = ret;
186 if (len)
187 ret->name = xstrndup(name, len);
188 else
189 ret->name = xstrdup(name);
190 ret->refname = xstrfmt("refs/heads/%s", ret->name);
191
192 return ret;
193 }
194
195 static struct rewrite *make_rewrite(struct rewrites *r, const char *base, int len)
196 {
197 struct rewrite *ret;
198 int i;
199
200 for (i = 0; i < r->rewrite_nr; i++) {
201 if (len
202 ? (len == r->rewrite[i]->baselen &&
203 !strncmp(base, r->rewrite[i]->base, len))
204 : !strcmp(base, r->rewrite[i]->base))
205 return r->rewrite[i];
206 }
207
208 ALLOC_GROW(r->rewrite, r->rewrite_nr + 1, r->rewrite_alloc);
209 ret = xcalloc(1, sizeof(struct rewrite));
210 r->rewrite[r->rewrite_nr++] = ret;
211 if (len) {
212 ret->base = xstrndup(base, len);
213 ret->baselen = len;
214 }
215 else {
216 ret->base = xstrdup(base);
217 ret->baselen = strlen(base);
218 }
219 return ret;
220 }
221
222 static void add_instead_of(struct rewrite *rewrite, const char *instead_of)
223 {
224 ALLOC_GROW(rewrite->instead_of, rewrite->instead_of_nr + 1, rewrite->instead_of_alloc);
225 rewrite->instead_of[rewrite->instead_of_nr].s = instead_of;
226 rewrite->instead_of[rewrite->instead_of_nr].len = strlen(instead_of);
227 rewrite->instead_of_nr++;
228 }
229
230 static const char *skip_spaces(const char *s)
231 {
232 while (isspace(*s))
233 s++;
234 return s;
235 }
236
237 static void read_remotes_file(struct remote *remote)
238 {
239 struct strbuf buf = STRBUF_INIT;
240 FILE *f = fopen_or_warn(git_path("remotes/%s", remote->name), "r");
241
242 if (!f)
243 return;
244 remote->configured_in_repo = 1;
245 remote->origin = REMOTE_REMOTES;
246 while (strbuf_getline(&buf, f) != EOF) {
247 const char *v;
248
249 strbuf_rtrim(&buf);
250
251 if (skip_prefix(buf.buf, "URL:", &v))
252 add_url_alias(remote, xstrdup(skip_spaces(v)));
253 else if (skip_prefix(buf.buf, "Push:", &v))
254 refspec_append(&remote->push, skip_spaces(v));
255 else if (skip_prefix(buf.buf, "Pull:", &v))
256 refspec_append(&remote->fetch, skip_spaces(v));
257 }
258 strbuf_release(&buf);
259 fclose(f);
260 }
261
262 static void read_branches_file(struct remote *remote)
263 {
264 char *frag;
265 struct strbuf buf = STRBUF_INIT;
266 FILE *f = fopen_or_warn(git_path("branches/%s", remote->name), "r");
267
268 if (!f)
269 return;
270
271 strbuf_getline_lf(&buf, f);
272 fclose(f);
273 strbuf_trim(&buf);
274 if (!buf.len) {
275 strbuf_release(&buf);
276 return;
277 }
278
279 remote->configured_in_repo = 1;
280 remote->origin = REMOTE_BRANCHES;
281
282 /*
283 * The branches file would have URL and optionally
284 * #branch specified. The "master" (or specified) branch is
285 * fetched and stored in the local branch matching the
286 * remote name.
287 */
288 frag = strchr(buf.buf, '#');
289 if (frag)
290 *(frag++) = '\0';
291 else
292 frag = "master";
293
294 add_url_alias(remote, strbuf_detach(&buf, NULL));
295 strbuf_addf(&buf, "refs/heads/%s:refs/heads/%s",
296 frag, remote->name);
297 refspec_append(&remote->fetch, buf.buf);
298
299 /*
300 * Cogito compatible push: push current HEAD to remote #branch
301 * (master if missing)
302 */
303 strbuf_reset(&buf);
304 strbuf_addf(&buf, "HEAD:refs/heads/%s", frag);
305 refspec_append(&remote->push, buf.buf);
306 remote->fetch_tags = 1; /* always auto-follow */
307 strbuf_release(&buf);
308 }
309
310 static int handle_config(const char *key, const char *value, void *cb)
311 {
312 const char *name;
313 int namelen;
314 const char *subkey;
315 struct remote *remote;
316 struct branch *branch;
317 if (parse_config_key(key, "branch", &name, &namelen, &subkey) >= 0) {
318 if (!name)
319 return 0;
320 branch = make_branch(name, namelen);
321 if (!strcmp(subkey, "remote")) {
322 return git_config_string(&branch->remote_name, key, value);
323 } else if (!strcmp(subkey, "pushremote")) {
324 return git_config_string(&branch->pushremote_name, key, value);
325 } else if (!strcmp(subkey, "merge")) {
326 if (!value)
327 return config_error_nonbool(key);
328 add_merge(branch, xstrdup(value));
329 }
330 return 0;
331 }
332 if (parse_config_key(key, "url", &name, &namelen, &subkey) >= 0) {
333 struct rewrite *rewrite;
334 if (!name)
335 return 0;
336 if (!strcmp(subkey, "insteadof")) {
337 rewrite = make_rewrite(&rewrites, name, namelen);
338 if (!value)
339 return config_error_nonbool(key);
340 add_instead_of(rewrite, xstrdup(value));
341 } else if (!strcmp(subkey, "pushinsteadof")) {
342 rewrite = make_rewrite(&rewrites_push, name, namelen);
343 if (!value)
344 return config_error_nonbool(key);
345 add_instead_of(rewrite, xstrdup(value));
346 }
347 }
348
349 if (parse_config_key(key, "remote", &name, &namelen, &subkey) < 0)
350 return 0;
351
352 /* Handle remote.* variables */
353 if (!name && !strcmp(subkey, "pushdefault"))
354 return git_config_string(&pushremote_name, key, value);
355
356 if (!name)
357 return 0;
358 /* Handle remote.<name>.* variables */
359 if (*name == '/') {
360 warning("Config remote shorthand cannot begin with '/': %s",
361 name);
362 return 0;
363 }
364 remote = make_remote(name, namelen);
365 remote->origin = REMOTE_CONFIG;
366 if (current_config_scope() == CONFIG_SCOPE_REPO)
367 remote->configured_in_repo = 1;
368 if (!strcmp(subkey, "mirror"))
369 remote->mirror = git_config_bool(key, value);
370 else if (!strcmp(subkey, "skipdefaultupdate"))
371 remote->skip_default_update = git_config_bool(key, value);
372 else if (!strcmp(subkey, "skipfetchall"))
373 remote->skip_default_update = git_config_bool(key, value);
374 else if (!strcmp(subkey, "prune"))
375 remote->prune = git_config_bool(key, value);
376 else if (!strcmp(subkey, "prunetags"))
377 remote->prune_tags = git_config_bool(key, value);
378 else if (!strcmp(subkey, "url")) {
379 const char *v;
380 if (git_config_string(&v, key, value))
381 return -1;
382 add_url(remote, v);
383 } else if (!strcmp(subkey, "pushurl")) {
384 const char *v;
385 if (git_config_string(&v, key, value))
386 return -1;
387 add_pushurl(remote, v);
388 } else if (!strcmp(subkey, "push")) {
389 const char *v;
390 if (git_config_string(&v, key, value))
391 return -1;
392 refspec_append(&remote->push, v);
393 free((char *)v);
394 } else if (!strcmp(subkey, "fetch")) {
395 const char *v;
396 if (git_config_string(&v, key, value))
397 return -1;
398 refspec_append(&remote->fetch, v);
399 free((char *)v);
400 } else if (!strcmp(subkey, "receivepack")) {
401 const char *v;
402 if (git_config_string(&v, key, value))
403 return -1;
404 if (!remote->receivepack)
405 remote->receivepack = v;
406 else
407 error("more than one receivepack given, using the first");
408 } else if (!strcmp(subkey, "uploadpack")) {
409 const char *v;
410 if (git_config_string(&v, key, value))
411 return -1;
412 if (!remote->uploadpack)
413 remote->uploadpack = v;
414 else
415 error("more than one uploadpack given, using the first");
416 } else if (!strcmp(subkey, "tagopt")) {
417 if (!strcmp(value, "--no-tags"))
418 remote->fetch_tags = -1;
419 else if (!strcmp(value, "--tags"))
420 remote->fetch_tags = 2;
421 } else if (!strcmp(subkey, "proxy")) {
422 return git_config_string((const char **)&remote->http_proxy,
423 key, value);
424 } else if (!strcmp(subkey, "proxyauthmethod")) {
425 return git_config_string((const char **)&remote->http_proxy_authmethod,
426 key, value);
427 } else if (!strcmp(subkey, "vcs")) {
428 return git_config_string(&remote->foreign_vcs, key, value);
429 }
430 return 0;
431 }
432
433 static void alias_all_urls(void)
434 {
435 int i, j;
436 for (i = 0; i < remotes_nr; i++) {
437 int add_pushurl_aliases;
438 if (!remotes[i])
439 continue;
440 for (j = 0; j < remotes[i]->pushurl_nr; j++) {
441 remotes[i]->pushurl[j] = alias_url(remotes[i]->pushurl[j], &rewrites);
442 }
443 add_pushurl_aliases = remotes[i]->pushurl_nr == 0;
444 for (j = 0; j < remotes[i]->url_nr; j++) {
445 if (add_pushurl_aliases)
446 add_pushurl_alias(remotes[i], remotes[i]->url[j]);
447 remotes[i]->url[j] = alias_url(remotes[i]->url[j], &rewrites);
448 }
449 }
450 }
451
452 static void read_config(void)
453 {
454 static int loaded;
455 int flag;
456
457 if (loaded)
458 return;
459 loaded = 1;
460
461 current_branch = NULL;
462 if (startup_info->have_repository) {
463 const char *head_ref = resolve_ref_unsafe("HEAD", 0, NULL, &flag);
464 if (head_ref && (flag & REF_ISSYMREF) &&
465 skip_prefix(head_ref, "refs/heads/", &head_ref)) {
466 current_branch = make_branch(head_ref, 0);
467 }
468 }
469 git_config(handle_config, NULL);
470 alias_all_urls();
471 }
472
473 static int valid_remote_nick(const char *name)
474 {
475 if (!name[0] || is_dot_or_dotdot(name))
476 return 0;
477
478 /* remote nicknames cannot contain slashes */
479 while (*name)
480 if (is_dir_sep(*name++))
481 return 0;
482 return 1;
483 }
484
485 const char *remote_for_branch(struct branch *branch, int *explicit)
486 {
487 if (branch && branch->remote_name) {
488 if (explicit)
489 *explicit = 1;
490 return branch->remote_name;
491 }
492 if (explicit)
493 *explicit = 0;
494 return "origin";
495 }
496
497 const char *pushremote_for_branch(struct branch *branch, int *explicit)
498 {
499 if (branch && branch->pushremote_name) {
500 if (explicit)
501 *explicit = 1;
502 return branch->pushremote_name;
503 }
504 if (pushremote_name) {
505 if (explicit)
506 *explicit = 1;
507 return pushremote_name;
508 }
509 return remote_for_branch(branch, explicit);
510 }
511
512 const char *remote_ref_for_branch(struct branch *branch, int for_push,
513 int *explicit)
514 {
515 if (branch) {
516 if (!for_push) {
517 if (branch->merge_nr) {
518 if (explicit)
519 *explicit = 1;
520 return branch->merge_name[0];
521 }
522 } else {
523 const char *dst, *remote_name =
524 pushremote_for_branch(branch, NULL);
525 struct remote *remote = remote_get(remote_name);
526
527 if (remote && remote->push.nr &&
528 (dst = apply_refspecs(&remote->push,
529 branch->refname))) {
530 if (explicit)
531 *explicit = 1;
532 return dst;
533 }
534 }
535 }
536 if (explicit)
537 *explicit = 0;
538 return "";
539 }
540
541 static struct remote *remote_get_1(const char *name,
542 const char *(*get_default)(struct branch *, int *))
543 {
544 struct remote *ret;
545 int name_given = 0;
546
547 read_config();
548
549 if (name)
550 name_given = 1;
551 else
552 name = get_default(current_branch, &name_given);
553
554 ret = make_remote(name, 0);
555 if (valid_remote_nick(name) && have_git_dir()) {
556 if (!valid_remote(ret))
557 read_remotes_file(ret);
558 if (!valid_remote(ret))
559 read_branches_file(ret);
560 }
561 if (name_given && !valid_remote(ret))
562 add_url_alias(ret, name);
563 if (!valid_remote(ret))
564 return NULL;
565 return ret;
566 }
567
568 struct remote *remote_get(const char *name)
569 {
570 return remote_get_1(name, remote_for_branch);
571 }
572
573 struct remote *pushremote_get(const char *name)
574 {
575 return remote_get_1(name, pushremote_for_branch);
576 }
577
578 int remote_is_configured(struct remote *remote, int in_repo)
579 {
580 if (!remote)
581 return 0;
582 if (in_repo)
583 return remote->configured_in_repo;
584 return !!remote->origin;
585 }
586
587 int for_each_remote(each_remote_fn fn, void *priv)
588 {
589 int i, result = 0;
590 read_config();
591 for (i = 0; i < remotes_nr && !result; i++) {
592 struct remote *r = remotes[i];
593 if (!r)
594 continue;
595 result = fn(r, priv);
596 }
597 return result;
598 }
599
600 static void handle_duplicate(struct ref *ref1, struct ref *ref2)
601 {
602 if (strcmp(ref1->name, ref2->name)) {
603 if (ref1->fetch_head_status != FETCH_HEAD_IGNORE &&
604 ref2->fetch_head_status != FETCH_HEAD_IGNORE) {
605 die(_("Cannot fetch both %s and %s to %s"),
606 ref1->name, ref2->name, ref2->peer_ref->name);
607 } else if (ref1->fetch_head_status != FETCH_HEAD_IGNORE &&
608 ref2->fetch_head_status == FETCH_HEAD_IGNORE) {
609 warning(_("%s usually tracks %s, not %s"),
610 ref2->peer_ref->name, ref2->name, ref1->name);
611 } else if (ref1->fetch_head_status == FETCH_HEAD_IGNORE &&
612 ref2->fetch_head_status == FETCH_HEAD_IGNORE) {
613 die(_("%s tracks both %s and %s"),
614 ref2->peer_ref->name, ref1->name, ref2->name);
615 } else {
616 /*
617 * This last possibility doesn't occur because
618 * FETCH_HEAD_IGNORE entries always appear at
619 * the end of the list.
620 */
621 die(_("Internal error"));
622 }
623 }
624 free(ref2->peer_ref);
625 free(ref2);
626 }
627
628 struct ref *ref_remove_duplicates(struct ref *ref_map)
629 {
630 struct string_list refs = STRING_LIST_INIT_NODUP;
631 struct ref *retval = NULL;
632 struct ref **p = &retval;
633
634 while (ref_map) {
635 struct ref *ref = ref_map;
636
637 ref_map = ref_map->next;
638 ref->next = NULL;
639
640 if (!ref->peer_ref) {
641 *p = ref;
642 p = &ref->next;
643 } else {
644 struct string_list_item *item =
645 string_list_insert(&refs, ref->peer_ref->name);
646
647 if (item->util) {
648 /* Entry already existed */
649 handle_duplicate((struct ref *)item->util, ref);
650 } else {
651 *p = ref;
652 p = &ref->next;
653 item->util = ref;
654 }
655 }
656 }
657
658 string_list_clear(&refs, 0);
659 return retval;
660 }
661
662 int remote_has_url(struct remote *remote, const char *url)
663 {
664 int i;
665 for (i = 0; i < remote->url_nr; i++) {
666 if (!strcmp(remote->url[i], url))
667 return 1;
668 }
669 return 0;
670 }
671
672 static int match_name_with_pattern(const char *key, const char *name,
673 const char *value, char **result)
674 {
675 const char *kstar = strchr(key, '*');
676 size_t klen;
677 size_t ksuffixlen;
678 size_t namelen;
679 int ret;
680 if (!kstar)
681 die("Key '%s' of pattern had no '*'", key);
682 klen = kstar - key;
683 ksuffixlen = strlen(kstar + 1);
684 namelen = strlen(name);
685 ret = !strncmp(name, key, klen) && namelen >= klen + ksuffixlen &&
686 !memcmp(name + namelen - ksuffixlen, kstar + 1, ksuffixlen);
687 if (ret && value) {
688 struct strbuf sb = STRBUF_INIT;
689 const char *vstar = strchr(value, '*');
690 if (!vstar)
691 die("Value '%s' of pattern has no '*'", value);
692 strbuf_add(&sb, value, vstar - value);
693 strbuf_add(&sb, name + klen, namelen - klen - ksuffixlen);
694 strbuf_addstr(&sb, vstar + 1);
695 *result = strbuf_detach(&sb, NULL);
696 }
697 return ret;
698 }
699
700 static void query_refspecs_multiple(struct refspec *rs,
701 struct refspec_item *query,
702 struct string_list *results)
703 {
704 int i;
705 int find_src = !query->src;
706
707 if (find_src && !query->dst)
708 error("query_refspecs_multiple: need either src or dst");
709
710 for (i = 0; i < rs->nr; i++) {
711 struct refspec_item *refspec = &rs->items[i];
712 const char *key = find_src ? refspec->dst : refspec->src;
713 const char *value = find_src ? refspec->src : refspec->dst;
714 const char *needle = find_src ? query->dst : query->src;
715 char **result = find_src ? &query->src : &query->dst;
716
717 if (!refspec->dst)
718 continue;
719 if (refspec->pattern) {
720 if (match_name_with_pattern(key, needle, value, result))
721 string_list_append_nodup(results, *result);
722 } else if (!strcmp(needle, key)) {
723 string_list_append(results, value);
724 }
725 }
726 }
727
728 int query_refspecs(struct refspec_item *refs, int ref_count, struct refspec_item *query)
729 {
730 int i;
731 int find_src = !query->src;
732 const char *needle = find_src ? query->dst : query->src;
733 char **result = find_src ? &query->src : &query->dst;
734
735 if (find_src && !query->dst)
736 return error("query_refspecs: need either src or dst");
737
738 for (i = 0; i < ref_count; i++) {
739 struct refspec_item *refspec = &refs[i];
740 const char *key = find_src ? refspec->dst : refspec->src;
741 const char *value = find_src ? refspec->src : refspec->dst;
742
743 if (!refspec->dst)
744 continue;
745 if (refspec->pattern) {
746 if (match_name_with_pattern(key, needle, value, result)) {
747 query->force = refspec->force;
748 return 0;
749 }
750 } else if (!strcmp(needle, key)) {
751 *result = xstrdup(value);
752 query->force = refspec->force;
753 return 0;
754 }
755 }
756 return -1;
757 }
758
759 char *apply_refspecs(struct refspec *rs, const char *name)
760 {
761 struct refspec_item query;
762
763 memset(&query, 0, sizeof(struct refspec_item));
764 query.src = (char *)name;
765
766 if (query_refspecs(rs->items, rs->nr, &query))
767 return NULL;
768
769 return query.dst;
770 }
771
772 int remote_find_tracking(struct remote *remote, struct refspec_item *refspec)
773 {
774 return query_refspecs(remote->fetch.items, remote->fetch.nr, refspec);
775 }
776
777 static struct ref *alloc_ref_with_prefix(const char *prefix, size_t prefixlen,
778 const char *name)
779 {
780 size_t len = strlen(name);
781 struct ref *ref = xcalloc(1, st_add4(sizeof(*ref), prefixlen, len, 1));
782 memcpy(ref->name, prefix, prefixlen);
783 memcpy(ref->name + prefixlen, name, len);
784 return ref;
785 }
786
787 struct ref *alloc_ref(const char *name)
788 {
789 return alloc_ref_with_prefix("", 0, name);
790 }
791
792 struct ref *copy_ref(const struct ref *ref)
793 {
794 struct ref *cpy;
795 size_t len;
796 if (!ref)
797 return NULL;
798 len = st_add3(sizeof(struct ref), strlen(ref->name), 1);
799 cpy = xmalloc(len);
800 memcpy(cpy, ref, len);
801 cpy->next = NULL;
802 cpy->symref = xstrdup_or_null(ref->symref);
803 cpy->remote_status = xstrdup_or_null(ref->remote_status);
804 cpy->peer_ref = copy_ref(ref->peer_ref);
805 return cpy;
806 }
807
808 struct ref *copy_ref_list(const struct ref *ref)
809 {
810 struct ref *ret = NULL;
811 struct ref **tail = &ret;
812 while (ref) {
813 *tail = copy_ref(ref);
814 ref = ref->next;
815 tail = &((*tail)->next);
816 }
817 return ret;
818 }
819
820 static void free_ref(struct ref *ref)
821 {
822 if (!ref)
823 return;
824 free_ref(ref->peer_ref);
825 free(ref->remote_status);
826 free(ref->symref);
827 free(ref);
828 }
829
830 void free_refs(struct ref *ref)
831 {
832 struct ref *next;
833 while (ref) {
834 next = ref->next;
835 free_ref(ref);
836 ref = next;
837 }
838 }
839
840 int ref_compare_name(const void *va, const void *vb)
841 {
842 const struct ref *a = va, *b = vb;
843 return strcmp(a->name, b->name);
844 }
845
846 static void *ref_list_get_next(const void *a)
847 {
848 return ((const struct ref *)a)->next;
849 }
850
851 static void ref_list_set_next(void *a, void *next)
852 {
853 ((struct ref *)a)->next = next;
854 }
855
856 void sort_ref_list(struct ref **l, int (*cmp)(const void *, const void *))
857 {
858 *l = llist_mergesort(*l, ref_list_get_next, ref_list_set_next, cmp);
859 }
860
861 int count_refspec_match(const char *pattern,
862 struct ref *refs,
863 struct ref **matched_ref)
864 {
865 int patlen = strlen(pattern);
866 struct ref *matched_weak = NULL;
867 struct ref *matched = NULL;
868 int weak_match = 0;
869 int match = 0;
870
871 for (weak_match = match = 0; refs; refs = refs->next) {
872 char *name = refs->name;
873 int namelen = strlen(name);
874
875 if (!refname_match(pattern, name))
876 continue;
877
878 /* A match is "weak" if it is with refs outside
879 * heads or tags, and did not specify the pattern
880 * in full (e.g. "refs/remotes/origin/master") or at
881 * least from the toplevel (e.g. "remotes/origin/master");
882 * otherwise "git push $URL master" would result in
883 * ambiguity between remotes/origin/master and heads/master
884 * at the remote site.
885 */
886 if (namelen != patlen &&
887 patlen != namelen - 5 &&
888 !starts_with(name, "refs/heads/") &&
889 !starts_with(name, "refs/tags/")) {
890 /* We want to catch the case where only weak
891 * matches are found and there are multiple
892 * matches, and where more than one strong
893 * matches are found, as ambiguous. One
894 * strong match with zero or more weak matches
895 * are acceptable as a unique match.
896 */
897 matched_weak = refs;
898 weak_match++;
899 }
900 else {
901 matched = refs;
902 match++;
903 }
904 }
905 if (!matched) {
906 if (matched_ref)
907 *matched_ref = matched_weak;
908 return weak_match;
909 }
910 else {
911 if (matched_ref)
912 *matched_ref = matched;
913 return match;
914 }
915 }
916
917 static void tail_link_ref(struct ref *ref, struct ref ***tail)
918 {
919 **tail = ref;
920 while (ref->next)
921 ref = ref->next;
922 *tail = &ref->next;
923 }
924
925 static struct ref *alloc_delete_ref(void)
926 {
927 struct ref *ref = alloc_ref("(delete)");
928 oidclr(&ref->new_oid);
929 return ref;
930 }
931
932 static int try_explicit_object_name(const char *name,
933 struct ref **match)
934 {
935 struct object_id oid;
936
937 if (!*name) {
938 if (match)
939 *match = alloc_delete_ref();
940 return 0;
941 }
942
943 if (get_oid(name, &oid))
944 return -1;
945
946 if (match) {
947 *match = alloc_ref(name);
948 oidcpy(&(*match)->new_oid, &oid);
949 }
950 return 0;
951 }
952
953 static struct ref *make_linked_ref(const char *name, struct ref ***tail)
954 {
955 struct ref *ret = alloc_ref(name);
956 tail_link_ref(ret, tail);
957 return ret;
958 }
959
960 static char *guess_ref(const char *name, struct ref *peer)
961 {
962 struct strbuf buf = STRBUF_INIT;
963
964 const char *r = resolve_ref_unsafe(peer->name, RESOLVE_REF_READING,
965 NULL, NULL);
966 if (!r)
967 return NULL;
968
969 if (starts_with(r, "refs/heads/"))
970 strbuf_addstr(&buf, "refs/heads/");
971 else if (starts_with(r, "refs/tags/"))
972 strbuf_addstr(&buf, "refs/tags/");
973 else
974 return NULL;
975
976 strbuf_addstr(&buf, name);
977 return strbuf_detach(&buf, NULL);
978 }
979
980 static int match_explicit_lhs(struct ref *src,
981 struct refspec_item *rs,
982 struct ref **match,
983 int *allocated_match)
984 {
985 switch (count_refspec_match(rs->src, src, match)) {
986 case 1:
987 if (allocated_match)
988 *allocated_match = 0;
989 return 0;
990 case 0:
991 /* The source could be in the get_sha1() format
992 * not a reference name. :refs/other is a
993 * way to delete 'other' ref at the remote end.
994 */
995 if (try_explicit_object_name(rs->src, match) < 0)
996 return error("src refspec %s does not match any.", rs->src);
997 if (allocated_match)
998 *allocated_match = 1;
999 return 0;
1000 default:
1001 return error("src refspec %s matches more than one.", rs->src);
1002 }
1003 }
1004
1005 static int match_explicit(struct ref *src, struct ref *dst,
1006 struct ref ***dst_tail,
1007 struct refspec_item *rs)
1008 {
1009 struct ref *matched_src, *matched_dst;
1010 int allocated_src;
1011
1012 const char *dst_value = rs->dst;
1013 char *dst_guess;
1014
1015 if (rs->pattern || rs->matching)
1016 return 0;
1017
1018 matched_src = matched_dst = NULL;
1019 if (match_explicit_lhs(src, rs, &matched_src, &allocated_src) < 0)
1020 return -1;
1021
1022 if (!dst_value) {
1023 int flag;
1024
1025 dst_value = resolve_ref_unsafe(matched_src->name,
1026 RESOLVE_REF_READING,
1027 NULL, &flag);
1028 if (!dst_value ||
1029 ((flag & REF_ISSYMREF) &&
1030 !starts_with(dst_value, "refs/heads/")))
1031 die("%s cannot be resolved to branch.",
1032 matched_src->name);
1033 }
1034
1035 switch (count_refspec_match(dst_value, dst, &matched_dst)) {
1036 case 1:
1037 break;
1038 case 0:
1039 if (starts_with(dst_value, "refs/"))
1040 matched_dst = make_linked_ref(dst_value, dst_tail);
1041 else if (is_null_oid(&matched_src->new_oid))
1042 error("unable to delete '%s': remote ref does not exist",
1043 dst_value);
1044 else if ((dst_guess = guess_ref(dst_value, matched_src))) {
1045 matched_dst = make_linked_ref(dst_guess, dst_tail);
1046 free(dst_guess);
1047 } else
1048 error("unable to push to unqualified destination: %s\n"
1049 "The destination refspec neither matches an "
1050 "existing ref on the remote nor\n"
1051 "begins with refs/, and we are unable to "
1052 "guess a prefix based on the source ref.",
1053 dst_value);
1054 break;
1055 default:
1056 matched_dst = NULL;
1057 error("dst refspec %s matches more than one.",
1058 dst_value);
1059 break;
1060 }
1061 if (!matched_dst)
1062 return -1;
1063 if (matched_dst->peer_ref)
1064 return error("dst ref %s receives from more than one src.",
1065 matched_dst->name);
1066 else {
1067 matched_dst->peer_ref = allocated_src ?
1068 matched_src :
1069 copy_ref(matched_src);
1070 matched_dst->force = rs->force;
1071 }
1072 return 0;
1073 }
1074
1075 static int match_explicit_refs(struct ref *src, struct ref *dst,
1076 struct ref ***dst_tail, struct refspec_item *rs,
1077 int rs_nr)
1078 {
1079 int i, errs;
1080 for (i = errs = 0; i < rs_nr; i++)
1081 errs += match_explicit(src, dst, dst_tail, &rs[i]);
1082 return errs;
1083 }
1084
1085 static char *get_ref_match(const struct refspec_item *rs, int rs_nr, const struct ref *ref,
1086 int send_mirror, int direction, const struct refspec_item **ret_pat)
1087 {
1088 const struct refspec_item *pat;
1089 char *name;
1090 int i;
1091 int matching_refs = -1;
1092 for (i = 0; i < rs_nr; i++) {
1093 if (rs[i].matching &&
1094 (matching_refs == -1 || rs[i].force)) {
1095 matching_refs = i;
1096 continue;
1097 }
1098
1099 if (rs[i].pattern) {
1100 const char *dst_side = rs[i].dst ? rs[i].dst : rs[i].src;
1101 int match;
1102 if (direction == FROM_SRC)
1103 match = match_name_with_pattern(rs[i].src, ref->name, dst_side, &name);
1104 else
1105 match = match_name_with_pattern(dst_side, ref->name, rs[i].src, &name);
1106 if (match) {
1107 matching_refs = i;
1108 break;
1109 }
1110 }
1111 }
1112 if (matching_refs == -1)
1113 return NULL;
1114
1115 pat = rs + matching_refs;
1116 if (pat->matching) {
1117 /*
1118 * "matching refs"; traditionally we pushed everything
1119 * including refs outside refs/heads/ hierarchy, but
1120 * that does not make much sense these days.
1121 */
1122 if (!send_mirror && !starts_with(ref->name, "refs/heads/"))
1123 return NULL;
1124 name = xstrdup(ref->name);
1125 }
1126 if (ret_pat)
1127 *ret_pat = pat;
1128 return name;
1129 }
1130
1131 static struct ref **tail_ref(struct ref **head)
1132 {
1133 struct ref **tail = head;
1134 while (*tail)
1135 tail = &((*tail)->next);
1136 return tail;
1137 }
1138
1139 struct tips {
1140 struct commit **tip;
1141 int nr, alloc;
1142 };
1143
1144 static void add_to_tips(struct tips *tips, const struct object_id *oid)
1145 {
1146 struct commit *commit;
1147
1148 if (is_null_oid(oid))
1149 return;
1150 commit = lookup_commit_reference_gently(oid, 1);
1151 if (!commit || (commit->object.flags & TMP_MARK))
1152 return;
1153 commit->object.flags |= TMP_MARK;
1154 ALLOC_GROW(tips->tip, tips->nr + 1, tips->alloc);
1155 tips->tip[tips->nr++] = commit;
1156 }
1157
1158 static void add_missing_tags(struct ref *src, struct ref **dst, struct ref ***dst_tail)
1159 {
1160 struct string_list dst_tag = STRING_LIST_INIT_NODUP;
1161 struct string_list src_tag = STRING_LIST_INIT_NODUP;
1162 struct string_list_item *item;
1163 struct ref *ref;
1164 struct tips sent_tips;
1165
1166 /*
1167 * Collect everything we know they would have at the end of
1168 * this push, and collect all tags they have.
1169 */
1170 memset(&sent_tips, 0, sizeof(sent_tips));
1171 for (ref = *dst; ref; ref = ref->next) {
1172 if (ref->peer_ref &&
1173 !is_null_oid(&ref->peer_ref->new_oid))
1174 add_to_tips(&sent_tips, &ref->peer_ref->new_oid);
1175 else
1176 add_to_tips(&sent_tips, &ref->old_oid);
1177 if (starts_with(ref->name, "refs/tags/"))
1178 string_list_append(&dst_tag, ref->name);
1179 }
1180 clear_commit_marks_many(sent_tips.nr, sent_tips.tip, TMP_MARK);
1181
1182 string_list_sort(&dst_tag);
1183
1184 /* Collect tags they do not have. */
1185 for (ref = src; ref; ref = ref->next) {
1186 if (!starts_with(ref->name, "refs/tags/"))
1187 continue; /* not a tag */
1188 if (string_list_has_string(&dst_tag, ref->name))
1189 continue; /* they already have it */
1190 if (oid_object_info(&ref->new_oid, NULL) != OBJ_TAG)
1191 continue; /* be conservative */
1192 item = string_list_append(&src_tag, ref->name);
1193 item->util = ref;
1194 }
1195 string_list_clear(&dst_tag, 0);
1196
1197 /*
1198 * At this point, src_tag lists tags that are missing from
1199 * dst, and sent_tips lists the tips we are pushing or those
1200 * that we know they already have. An element in the src_tag
1201 * that is an ancestor of any of the sent_tips needs to be
1202 * sent to the other side.
1203 */
1204 if (sent_tips.nr) {
1205 for_each_string_list_item(item, &src_tag) {
1206 struct ref *ref = item->util;
1207 struct ref *dst_ref;
1208 struct commit *commit;
1209
1210 if (is_null_oid(&ref->new_oid))
1211 continue;
1212 commit = lookup_commit_reference_gently(&ref->new_oid,
1213 1);
1214 if (!commit)
1215 /* not pushing a commit, which is not an error */
1216 continue;
1217
1218 /*
1219 * Is this tag, which they do not have, reachable from
1220 * any of the commits we are sending?
1221 */
1222 if (!in_merge_bases_many(commit, sent_tips.nr, sent_tips.tip))
1223 continue;
1224
1225 /* Add it in */
1226 dst_ref = make_linked_ref(ref->name, dst_tail);
1227 oidcpy(&dst_ref->new_oid, &ref->new_oid);
1228 dst_ref->peer_ref = copy_ref(ref);
1229 }
1230 }
1231 string_list_clear(&src_tag, 0);
1232 free(sent_tips.tip);
1233 }
1234
1235 struct ref *find_ref_by_name(const struct ref *list, const char *name)
1236 {
1237 for ( ; list; list = list->next)
1238 if (!strcmp(list->name, name))
1239 return (struct ref *)list;
1240 return NULL;
1241 }
1242
1243 static void prepare_ref_index(struct string_list *ref_index, struct ref *ref)
1244 {
1245 for ( ; ref; ref = ref->next)
1246 string_list_append_nodup(ref_index, ref->name)->util = ref;
1247
1248 string_list_sort(ref_index);
1249 }
1250
1251 /*
1252 * Given only the set of local refs, sanity-check the set of push
1253 * refspecs. We can't catch all errors that match_push_refs would,
1254 * but we can catch some errors early before even talking to the
1255 * remote side.
1256 */
1257 int check_push_refs(struct ref *src, int nr_refspec, const char **refspec_names)
1258 {
1259 struct refspec refspec = REFSPEC_INIT_PUSH;
1260 int ret = 0;
1261 int i;
1262
1263 refspec_appendn(&refspec, refspec_names, nr_refspec);
1264
1265 for (i = 0; i < refspec.nr; i++) {
1266 struct refspec_item *rs = &refspec.items[i];
1267
1268 if (rs->pattern || rs->matching)
1269 continue;
1270
1271 ret |= match_explicit_lhs(src, rs, NULL, NULL);
1272 }
1273
1274 refspec_clear(&refspec);
1275 return ret;
1276 }
1277
1278 /*
1279 * Given the set of refs the local repository has, the set of refs the
1280 * remote repository has, and the refspec used for push, determine
1281 * what remote refs we will update and with what value by setting
1282 * peer_ref (which object is being pushed) and force (if the push is
1283 * forced) in elements of "dst". The function may add new elements to
1284 * dst (e.g. pushing to a new branch, done in match_explicit_refs).
1285 */
1286 int match_push_refs(struct ref *src, struct ref **dst,
1287 int nr_refspec, const char **refspec, int flags)
1288 {
1289 struct refspec rs = REFSPEC_INIT_PUSH;
1290 int send_all = flags & MATCH_REFS_ALL;
1291 int send_mirror = flags & MATCH_REFS_MIRROR;
1292 int send_prune = flags & MATCH_REFS_PRUNE;
1293 int errs;
1294 static const char *default_refspec[] = { ":", NULL };
1295 struct ref *ref, **dst_tail = tail_ref(dst);
1296 struct string_list dst_ref_index = STRING_LIST_INIT_NODUP;
1297
1298 if (!nr_refspec) {
1299 nr_refspec = 1;
1300 refspec = default_refspec;
1301 }
1302 refspec_appendn(&rs, refspec, nr_refspec);
1303 errs = match_explicit_refs(src, *dst, &dst_tail, rs.items, rs.nr);
1304
1305 /* pick the remainder */
1306 for (ref = src; ref; ref = ref->next) {
1307 struct string_list_item *dst_item;
1308 struct ref *dst_peer;
1309 const struct refspec_item *pat = NULL;
1310 char *dst_name;
1311
1312 dst_name = get_ref_match(rs.items, rs.nr, ref, send_mirror, FROM_SRC, &pat);
1313 if (!dst_name)
1314 continue;
1315
1316 if (!dst_ref_index.nr)
1317 prepare_ref_index(&dst_ref_index, *dst);
1318
1319 dst_item = string_list_lookup(&dst_ref_index, dst_name);
1320 dst_peer = dst_item ? dst_item->util : NULL;
1321 if (dst_peer) {
1322 if (dst_peer->peer_ref)
1323 /* We're already sending something to this ref. */
1324 goto free_name;
1325 } else {
1326 if (pat->matching && !(send_all || send_mirror))
1327 /*
1328 * Remote doesn't have it, and we have no
1329 * explicit pattern, and we don't have
1330 * --all or --mirror.
1331 */
1332 goto free_name;
1333
1334 /* Create a new one and link it */
1335 dst_peer = make_linked_ref(dst_name, &dst_tail);
1336 oidcpy(&dst_peer->new_oid, &ref->new_oid);
1337 string_list_insert(&dst_ref_index,
1338 dst_peer->name)->util = dst_peer;
1339 }
1340 dst_peer->peer_ref = copy_ref(ref);
1341 dst_peer->force = pat->force;
1342 free_name:
1343 free(dst_name);
1344 }
1345
1346 string_list_clear(&dst_ref_index, 0);
1347
1348 if (flags & MATCH_REFS_FOLLOW_TAGS)
1349 add_missing_tags(src, dst, &dst_tail);
1350
1351 if (send_prune) {
1352 struct string_list src_ref_index = STRING_LIST_INIT_NODUP;
1353 /* check for missing refs on the remote */
1354 for (ref = *dst; ref; ref = ref->next) {
1355 char *src_name;
1356
1357 if (ref->peer_ref)
1358 /* We're already sending something to this ref. */
1359 continue;
1360
1361 src_name = get_ref_match(rs.items, rs.nr, ref, send_mirror, FROM_DST, NULL);
1362 if (src_name) {
1363 if (!src_ref_index.nr)
1364 prepare_ref_index(&src_ref_index, src);
1365 if (!string_list_has_string(&src_ref_index,
1366 src_name))
1367 ref->peer_ref = alloc_delete_ref();
1368 free(src_name);
1369 }
1370 }
1371 string_list_clear(&src_ref_index, 0);
1372 }
1373
1374 refspec_clear(&rs);
1375
1376 if (errs)
1377 return -1;
1378 return 0;
1379 }
1380
1381 void set_ref_status_for_push(struct ref *remote_refs, int send_mirror,
1382 int force_update)
1383 {
1384 struct ref *ref;
1385
1386 for (ref = remote_refs; ref; ref = ref->next) {
1387 int force_ref_update = ref->force || force_update;
1388 int reject_reason = 0;
1389
1390 if (ref->peer_ref)
1391 oidcpy(&ref->new_oid, &ref->peer_ref->new_oid);
1392 else if (!send_mirror)
1393 continue;
1394
1395 ref->deletion = is_null_oid(&ref->new_oid);
1396 if (!ref->deletion &&
1397 !oidcmp(&ref->old_oid, &ref->new_oid)) {
1398 ref->status = REF_STATUS_UPTODATE;
1399 continue;
1400 }
1401
1402 /*
1403 * If the remote ref has moved and is now different
1404 * from what we expect, reject any push.
1405 *
1406 * It also is an error if the user told us to check
1407 * with the remote-tracking branch to find the value
1408 * to expect, but we did not have such a tracking
1409 * branch.
1410 */
1411 if (ref->expect_old_sha1) {
1412 if (oidcmp(&ref->old_oid, &ref->old_oid_expect))
1413 reject_reason = REF_STATUS_REJECT_STALE;
1414 else
1415 /* If the ref isn't stale then force the update. */
1416 force_ref_update = 1;
1417 }
1418
1419 /*
1420 * If the update isn't already rejected then check
1421 * the usual "must fast-forward" rules.
1422 *
1423 * Decide whether an individual refspec A:B can be
1424 * pushed. The push will succeed if any of the
1425 * following are true:
1426 *
1427 * (1) the remote reference B does not exist
1428 *
1429 * (2) the remote reference B is being removed (i.e.,
1430 * pushing :B where no source is specified)
1431 *
1432 * (3) the destination is not under refs/tags/, and
1433 * if the old and new value is a commit, the new
1434 * is a descendant of the old.
1435 *
1436 * (4) it is forced using the +A:B notation, or by
1437 * passing the --force argument
1438 */
1439
1440 if (!reject_reason && !ref->deletion && !is_null_oid(&ref->old_oid)) {
1441 if (starts_with(ref->name, "refs/tags/"))
1442 reject_reason = REF_STATUS_REJECT_ALREADY_EXISTS;
1443 else if (!has_object_file(&ref->old_oid))
1444 reject_reason = REF_STATUS_REJECT_FETCH_FIRST;
1445 else if (!lookup_commit_reference_gently(&ref->old_oid, 1) ||
1446 !lookup_commit_reference_gently(&ref->new_oid, 1))
1447 reject_reason = REF_STATUS_REJECT_NEEDS_FORCE;
1448 else if (!ref_newer(&ref->new_oid, &ref->old_oid))
1449 reject_reason = REF_STATUS_REJECT_NONFASTFORWARD;
1450 }
1451
1452 /*
1453 * "--force" will defeat any rejection implemented
1454 * by the rules above.
1455 */
1456 if (!force_ref_update)
1457 ref->status = reject_reason;
1458 else if (reject_reason)
1459 ref->forced_update = 1;
1460 }
1461 }
1462
1463 static void set_merge(struct branch *ret)
1464 {
1465 struct remote *remote;
1466 char *ref;
1467 struct object_id oid;
1468 int i;
1469
1470 if (!ret)
1471 return; /* no branch */
1472 if (ret->merge)
1473 return; /* already run */
1474 if (!ret->remote_name || !ret->merge_nr) {
1475 /*
1476 * no merge config; let's make sure we don't confuse callers
1477 * with a non-zero merge_nr but a NULL merge
1478 */
1479 ret->merge_nr = 0;
1480 return;
1481 }
1482
1483 remote = remote_get(ret->remote_name);
1484
1485 ret->merge = xcalloc(ret->merge_nr, sizeof(*ret->merge));
1486 for (i = 0; i < ret->merge_nr; i++) {
1487 ret->merge[i] = xcalloc(1, sizeof(**ret->merge));
1488 ret->merge[i]->src = xstrdup(ret->merge_name[i]);
1489 if (!remote_find_tracking(remote, ret->merge[i]) ||
1490 strcmp(ret->remote_name, "."))
1491 continue;
1492 if (dwim_ref(ret->merge_name[i], strlen(ret->merge_name[i]),
1493 &oid, &ref) == 1)
1494 ret->merge[i]->dst = ref;
1495 else
1496 ret->merge[i]->dst = xstrdup(ret->merge_name[i]);
1497 }
1498 }
1499
1500 struct branch *branch_get(const char *name)
1501 {
1502 struct branch *ret;
1503
1504 read_config();
1505 if (!name || !*name || !strcmp(name, "HEAD"))
1506 ret = current_branch;
1507 else
1508 ret = make_branch(name, 0);
1509 set_merge(ret);
1510 return ret;
1511 }
1512
1513 int branch_has_merge_config(struct branch *branch)
1514 {
1515 return branch && !!branch->merge;
1516 }
1517
1518 int branch_merge_matches(struct branch *branch,
1519 int i,
1520 const char *refname)
1521 {
1522 if (!branch || i < 0 || i >= branch->merge_nr)
1523 return 0;
1524 return refname_match(branch->merge[i]->src, refname);
1525 }
1526
1527 __attribute__((format (printf,2,3)))
1528 static const char *error_buf(struct strbuf *err, const char *fmt, ...)
1529 {
1530 if (err) {
1531 va_list ap;
1532 va_start(ap, fmt);
1533 strbuf_vaddf(err, fmt, ap);
1534 va_end(ap);
1535 }
1536 return NULL;
1537 }
1538
1539 const char *branch_get_upstream(struct branch *branch, struct strbuf *err)
1540 {
1541 if (!branch)
1542 return error_buf(err, _("HEAD does not point to a branch"));
1543
1544 if (!branch->merge || !branch->merge[0]) {
1545 /*
1546 * no merge config; is it because the user didn't define any,
1547 * or because it is not a real branch, and get_branch
1548 * auto-vivified it?
1549 */
1550 if (!ref_exists(branch->refname))
1551 return error_buf(err, _("no such branch: '%s'"),
1552 branch->name);
1553 return error_buf(err,
1554 _("no upstream configured for branch '%s'"),
1555 branch->name);
1556 }
1557
1558 if (!branch->merge[0]->dst)
1559 return error_buf(err,
1560 _("upstream branch '%s' not stored as a remote-tracking branch"),
1561 branch->merge[0]->src);
1562
1563 return branch->merge[0]->dst;
1564 }
1565
1566 static const char *tracking_for_push_dest(struct remote *remote,
1567 const char *refname,
1568 struct strbuf *err)
1569 {
1570 char *ret;
1571
1572 ret = apply_refspecs(&remote->fetch, refname);
1573 if (!ret)
1574 return error_buf(err,
1575 _("push destination '%s' on remote '%s' has no local tracking branch"),
1576 refname, remote->name);
1577 return ret;
1578 }
1579
1580 static const char *branch_get_push_1(struct branch *branch, struct strbuf *err)
1581 {
1582 struct remote *remote;
1583
1584 remote = remote_get(pushremote_for_branch(branch, NULL));
1585 if (!remote)
1586 return error_buf(err,
1587 _("branch '%s' has no remote for pushing"),
1588 branch->name);
1589
1590 if (remote->push.nr) {
1591 char *dst;
1592 const char *ret;
1593
1594 dst = apply_refspecs(&remote->push, branch->refname);
1595 if (!dst)
1596 return error_buf(err,
1597 _("push refspecs for '%s' do not include '%s'"),
1598 remote->name, branch->name);
1599
1600 ret = tracking_for_push_dest(remote, dst, err);
1601 free(dst);
1602 return ret;
1603 }
1604
1605 if (remote->mirror)
1606 return tracking_for_push_dest(remote, branch->refname, err);
1607
1608 switch (push_default) {
1609 case PUSH_DEFAULT_NOTHING:
1610 return error_buf(err, _("push has no destination (push.default is 'nothing')"));
1611
1612 case PUSH_DEFAULT_MATCHING:
1613 case PUSH_DEFAULT_CURRENT:
1614 return tracking_for_push_dest(remote, branch->refname, err);
1615
1616 case PUSH_DEFAULT_UPSTREAM:
1617 return branch_get_upstream(branch, err);
1618
1619 case PUSH_DEFAULT_UNSPECIFIED:
1620 case PUSH_DEFAULT_SIMPLE:
1621 {
1622 const char *up, *cur;
1623
1624 up = branch_get_upstream(branch, err);
1625 if (!up)
1626 return NULL;
1627 cur = tracking_for_push_dest(remote, branch->refname, err);
1628 if (!cur)
1629 return NULL;
1630 if (strcmp(cur, up))
1631 return error_buf(err,
1632 _("cannot resolve 'simple' push to a single destination"));
1633 return cur;
1634 }
1635 }
1636
1637 die("BUG: unhandled push situation");
1638 }
1639
1640 const char *branch_get_push(struct branch *branch, struct strbuf *err)
1641 {
1642 if (!branch)
1643 return error_buf(err, _("HEAD does not point to a branch"));
1644
1645 if (!branch->push_tracking_ref)
1646 branch->push_tracking_ref = branch_get_push_1(branch, err);
1647 return branch->push_tracking_ref;
1648 }
1649
1650 static int ignore_symref_update(const char *refname)
1651 {
1652 int flag;
1653
1654 if (!resolve_ref_unsafe(refname, 0, NULL, &flag))
1655 return 0; /* non-existing refs are OK */
1656 return (flag & REF_ISSYMREF);
1657 }
1658
1659 /*
1660 * Create and return a list of (struct ref) consisting of copies of
1661 * each remote_ref that matches refspec. refspec must be a pattern.
1662 * Fill in the copies' peer_ref to describe the local tracking refs to
1663 * which they map. Omit any references that would map to an existing
1664 * local symbolic ref.
1665 */
1666 static struct ref *get_expanded_map(const struct ref *remote_refs,
1667 const struct refspec_item *refspec)
1668 {
1669 const struct ref *ref;
1670 struct ref *ret = NULL;
1671 struct ref **tail = &ret;
1672
1673 for (ref = remote_refs; ref; ref = ref->next) {
1674 char *expn_name = NULL;
1675
1676 if (strchr(ref->name, '^'))
1677 continue; /* a dereference item */
1678 if (match_name_with_pattern(refspec->src, ref->name,
1679 refspec->dst, &expn_name) &&
1680 !ignore_symref_update(expn_name)) {
1681 struct ref *cpy = copy_ref(ref);
1682
1683 cpy->peer_ref = alloc_ref(expn_name);
1684 if (refspec->force)
1685 cpy->peer_ref->force = 1;
1686 *tail = cpy;
1687 tail = &cpy->next;
1688 }
1689 free(expn_name);
1690 }
1691
1692 return ret;
1693 }
1694
1695 static const struct ref *find_ref_by_name_abbrev(const struct ref *refs, const char *name)
1696 {
1697 const struct ref *ref;
1698 for (ref = refs; ref; ref = ref->next) {
1699 if (refname_match(name, ref->name))
1700 return ref;
1701 }
1702 return NULL;
1703 }
1704
1705 struct ref *get_remote_ref(const struct ref *remote_refs, const char *name)
1706 {
1707 const struct ref *ref = find_ref_by_name_abbrev(remote_refs, name);
1708
1709 if (!ref)
1710 return NULL;
1711
1712 return copy_ref(ref);
1713 }
1714
1715 static struct ref *get_local_ref(const char *name)
1716 {
1717 if (!name || name[0] == '\0')
1718 return NULL;
1719
1720 if (starts_with(name, "refs/"))
1721 return alloc_ref(name);
1722
1723 if (starts_with(name, "heads/") ||
1724 starts_with(name, "tags/") ||
1725 starts_with(name, "remotes/"))
1726 return alloc_ref_with_prefix("refs/", 5, name);
1727
1728 return alloc_ref_with_prefix("refs/heads/", 11, name);
1729 }
1730
1731 int get_fetch_map(const struct ref *remote_refs,
1732 const struct refspec_item *refspec,
1733 struct ref ***tail,
1734 int missing_ok)
1735 {
1736 struct ref *ref_map, **rmp;
1737
1738 if (refspec->pattern) {
1739 ref_map = get_expanded_map(remote_refs, refspec);
1740 } else {
1741 const char *name = refspec->src[0] ? refspec->src : "HEAD";
1742
1743 if (refspec->exact_sha1) {
1744 ref_map = alloc_ref(name);
1745 get_oid_hex(name, &ref_map->old_oid);
1746 } else {
1747 ref_map = get_remote_ref(remote_refs, name);
1748 }
1749 if (!missing_ok && !ref_map)
1750 die("Couldn't find remote ref %s", name);
1751 if (ref_map) {
1752 ref_map->peer_ref = get_local_ref(refspec->dst);
1753 if (ref_map->peer_ref && refspec->force)
1754 ref_map->peer_ref->force = 1;
1755 }
1756 }
1757
1758 for (rmp = &ref_map; *rmp; ) {
1759 if ((*rmp)->peer_ref) {
1760 if (!starts_with((*rmp)->peer_ref->name, "refs/") ||
1761 check_refname_format((*rmp)->peer_ref->name, 0)) {
1762 struct ref *ignore = *rmp;
1763 error("* Ignoring funny ref '%s' locally",
1764 (*rmp)->peer_ref->name);
1765 *rmp = (*rmp)->next;
1766 free(ignore->peer_ref);
1767 free(ignore);
1768 continue;
1769 }
1770 }
1771 rmp = &((*rmp)->next);
1772 }
1773
1774 if (ref_map)
1775 tail_link_ref(ref_map, tail);
1776
1777 return 0;
1778 }
1779
1780 int resolve_remote_symref(struct ref *ref, struct ref *list)
1781 {
1782 if (!ref->symref)
1783 return 0;
1784 for (; list; list = list->next)
1785 if (!strcmp(ref->symref, list->name)) {
1786 oidcpy(&ref->old_oid, &list->old_oid);
1787 return 0;
1788 }
1789 return 1;
1790 }
1791
1792 static void unmark_and_free(struct commit_list *list, unsigned int mark)
1793 {
1794 while (list) {
1795 struct commit *commit = pop_commit(&list);
1796 commit->object.flags &= ~mark;
1797 }
1798 }
1799
1800 int ref_newer(const struct object_id *new_oid, const struct object_id *old_oid)
1801 {
1802 struct object *o;
1803 struct commit *old_commit, *new_commit;
1804 struct commit_list *list, *used;
1805 int found = 0;
1806
1807 /*
1808 * Both new_commit and old_commit must be commit-ish and new_commit is descendant of
1809 * old_commit. Otherwise we require --force.
1810 */
1811 o = deref_tag(parse_object(old_oid), NULL, 0);
1812 if (!o || o->type != OBJ_COMMIT)
1813 return 0;
1814 old_commit = (struct commit *) o;
1815
1816 o = deref_tag(parse_object(new_oid), NULL, 0);
1817 if (!o || o->type != OBJ_COMMIT)
1818 return 0;
1819 new_commit = (struct commit *) o;
1820
1821 if (parse_commit(new_commit) < 0)
1822 return 0;
1823
1824 used = list = NULL;
1825 commit_list_insert(new_commit, &list);
1826 while (list) {
1827 new_commit = pop_most_recent_commit(&list, TMP_MARK);
1828 commit_list_insert(new_commit, &used);
1829 if (new_commit == old_commit) {
1830 found = 1;
1831 break;
1832 }
1833 }
1834 unmark_and_free(list, TMP_MARK);
1835 unmark_and_free(used, TMP_MARK);
1836 return found;
1837 }
1838
1839 /*
1840 * Lookup the upstream branch for the given branch and if present, optionally
1841 * compute the commit ahead/behind values for the pair.
1842 *
1843 * If abf is AHEAD_BEHIND_FULL, compute the full ahead/behind and return the
1844 * counts in *num_ours and *num_theirs. If abf is AHEAD_BEHIND_QUICK, skip
1845 * the (potentially expensive) a/b computation (*num_ours and *num_theirs are
1846 * set to zero).
1847 *
1848 * The name of the upstream branch (or NULL if no upstream is defined) is
1849 * returned via *upstream_name, if it is not itself NULL.
1850 *
1851 * Returns -1 if num_ours and num_theirs could not be filled in (e.g., no
1852 * upstream defined, or ref does not exist). Returns 0 if the commits are
1853 * identical. Returns 1 if commits are different.
1854 */
1855 int stat_tracking_info(struct branch *branch, int *num_ours, int *num_theirs,
1856 const char **upstream_name, enum ahead_behind_flags abf)
1857 {
1858 struct object_id oid;
1859 struct commit *ours, *theirs;
1860 struct rev_info revs;
1861 const char *base;
1862 struct argv_array argv = ARGV_ARRAY_INIT;
1863
1864 /* Cannot stat unless we are marked to build on top of somebody else. */
1865 base = branch_get_upstream(branch, NULL);
1866 if (upstream_name)
1867 *upstream_name = base;
1868 if (!base)
1869 return -1;
1870
1871 /* Cannot stat if what we used to build on no longer exists */
1872 if (read_ref(base, &oid))
1873 return -1;
1874 theirs = lookup_commit_reference(&oid);
1875 if (!theirs)
1876 return -1;
1877
1878 if (read_ref(branch->refname, &oid))
1879 return -1;
1880 ours = lookup_commit_reference(&oid);
1881 if (!ours)
1882 return -1;
1883
1884 *num_theirs = *num_ours = 0;
1885
1886 /* are we the same? */
1887 if (theirs == ours)
1888 return 0;
1889 if (abf == AHEAD_BEHIND_QUICK)
1890 return 1;
1891 if (abf != AHEAD_BEHIND_FULL)
1892 BUG("stat_tracking_info: invalid abf '%d'", abf);
1893
1894 /* Run "rev-list --left-right ours...theirs" internally... */
1895 argv_array_push(&argv, ""); /* ignored */
1896 argv_array_push(&argv, "--left-right");
1897 argv_array_pushf(&argv, "%s...%s",
1898 oid_to_hex(&ours->object.oid),
1899 oid_to_hex(&theirs->object.oid));
1900 argv_array_push(&argv, "--");
1901
1902 init_revisions(&revs, NULL);
1903 setup_revisions(argv.argc, argv.argv, &revs, NULL);
1904 if (prepare_revision_walk(&revs))
1905 die("revision walk setup failed");
1906
1907 /* ... and count the commits on each side. */
1908 while (1) {
1909 struct commit *c = get_revision(&revs);
1910 if (!c)
1911 break;
1912 if (c->object.flags & SYMMETRIC_LEFT)
1913 (*num_ours)++;
1914 else
1915 (*num_theirs)++;
1916 }
1917
1918 /* clear object flags smudged by the above traversal */
1919 clear_commit_marks(ours, ALL_REV_FLAGS);
1920 clear_commit_marks(theirs, ALL_REV_FLAGS);
1921
1922 argv_array_clear(&argv);
1923 return 1;
1924 }
1925
1926 /*
1927 * Return true when there is anything to report, otherwise false.
1928 */
1929 int format_tracking_info(struct branch *branch, struct strbuf *sb,
1930 enum ahead_behind_flags abf)
1931 {
1932 int ours, theirs, sti;
1933 const char *full_base;
1934 char *base;
1935 int upstream_is_gone = 0;
1936
1937 sti = stat_tracking_info(branch, &ours, &theirs, &full_base, abf);
1938 if (sti < 0) {
1939 if (!full_base)
1940 return 0;
1941 upstream_is_gone = 1;
1942 }
1943
1944 base = shorten_unambiguous_ref(full_base, 0);
1945 if (upstream_is_gone) {
1946 strbuf_addf(sb,
1947 _("Your branch is based on '%s', but the upstream is gone.\n"),
1948 base);
1949 if (advice_status_hints)
1950 strbuf_addstr(sb,
1951 _(" (use \"git branch --unset-upstream\" to fixup)\n"));
1952 } else if (!sti) {
1953 strbuf_addf(sb,
1954 _("Your branch is up to date with '%s'.\n"),
1955 base);
1956 } else if (abf == AHEAD_BEHIND_QUICK) {
1957 strbuf_addf(sb,
1958 _("Your branch and '%s' refer to different commits.\n"),
1959 base);
1960 if (advice_status_hints)
1961 strbuf_addf(sb, _(" (use \"%s\" for details)\n"),
1962 "git status --ahead-behind");
1963 } else if (!theirs) {
1964 strbuf_addf(sb,
1965 Q_("Your branch is ahead of '%s' by %d commit.\n",
1966 "Your branch is ahead of '%s' by %d commits.\n",
1967 ours),
1968 base, ours);
1969 if (advice_status_hints)
1970 strbuf_addstr(sb,
1971 _(" (use \"git push\" to publish your local commits)\n"));
1972 } else if (!ours) {
1973 strbuf_addf(sb,
1974 Q_("Your branch is behind '%s' by %d commit, "
1975 "and can be fast-forwarded.\n",
1976 "Your branch is behind '%s' by %d commits, "
1977 "and can be fast-forwarded.\n",
1978 theirs),
1979 base, theirs);
1980 if (advice_status_hints)
1981 strbuf_addstr(sb,
1982 _(" (use \"git pull\" to update your local branch)\n"));
1983 } else {
1984 strbuf_addf(sb,
1985 Q_("Your branch and '%s' have diverged,\n"
1986 "and have %d and %d different commit each, "
1987 "respectively.\n",
1988 "Your branch and '%s' have diverged,\n"
1989 "and have %d and %d different commits each, "
1990 "respectively.\n",
1991 ours + theirs),
1992 base, ours, theirs);
1993 if (advice_status_hints)
1994 strbuf_addstr(sb,
1995 _(" (use \"git pull\" to merge the remote branch into yours)\n"));
1996 }
1997 free(base);
1998 return 1;
1999 }
2000
2001 static int one_local_ref(const char *refname, const struct object_id *oid,
2002 int flag, void *cb_data)
2003 {
2004 struct ref ***local_tail = cb_data;
2005 struct ref *ref;
2006
2007 /* we already know it starts with refs/ to get here */
2008 if (check_refname_format(refname + 5, 0))
2009 return 0;
2010
2011 ref = alloc_ref(refname);
2012 oidcpy(&ref->new_oid, oid);
2013 **local_tail = ref;
2014 *local_tail = &ref->next;
2015 return 0;
2016 }
2017
2018 struct ref *get_local_heads(void)
2019 {
2020 struct ref *local_refs = NULL, **local_tail = &local_refs;
2021
2022 for_each_ref(one_local_ref, &local_tail);
2023 return local_refs;
2024 }
2025
2026 struct ref *guess_remote_head(const struct ref *head,
2027 const struct ref *refs,
2028 int all)
2029 {
2030 const struct ref *r;
2031 struct ref *list = NULL;
2032 struct ref **tail = &list;
2033
2034 if (!head)
2035 return NULL;
2036
2037 /*
2038 * Some transports support directly peeking at
2039 * where HEAD points; if that is the case, then
2040 * we don't have to guess.
2041 */
2042 if (head->symref)
2043 return copy_ref(find_ref_by_name(refs, head->symref));
2044
2045 /* If refs/heads/master could be right, it is. */
2046 if (!all) {
2047 r = find_ref_by_name(refs, "refs/heads/master");
2048 if (r && !oidcmp(&r->old_oid, &head->old_oid))
2049 return copy_ref(r);
2050 }
2051
2052 /* Look for another ref that points there */
2053 for (r = refs; r; r = r->next) {
2054 if (r != head &&
2055 starts_with(r->name, "refs/heads/") &&
2056 !oidcmp(&r->old_oid, &head->old_oid)) {
2057 *tail = copy_ref(r);
2058 tail = &((*tail)->next);
2059 if (!all)
2060 break;
2061 }
2062 }
2063
2064 return list;
2065 }
2066
2067 struct stale_heads_info {
2068 struct string_list *ref_names;
2069 struct ref **stale_refs_tail;
2070 struct refspec *rs;
2071 };
2072
2073 static int get_stale_heads_cb(const char *refname, const struct object_id *oid,
2074 int flags, void *cb_data)
2075 {
2076 struct stale_heads_info *info = cb_data;
2077 struct string_list matches = STRING_LIST_INIT_DUP;
2078 struct refspec_item query;
2079 int i, stale = 1;
2080 memset(&query, 0, sizeof(struct refspec_item));
2081 query.dst = (char *)refname;
2082
2083 query_refspecs_multiple(info->rs, &query, &matches);
2084 if (matches.nr == 0)
2085 goto clean_exit; /* No matches */
2086
2087 /*
2088 * If we did find a suitable refspec and it's not a symref and
2089 * it's not in the list of refs that currently exist in that
2090 * remote, we consider it to be stale. In order to deal with
2091 * overlapping refspecs, we need to go over all of the
2092 * matching refs.
2093 */
2094 if (flags & REF_ISSYMREF)
2095 goto clean_exit;
2096
2097 for (i = 0; stale && i < matches.nr; i++)
2098 if (string_list_has_string(info->ref_names, matches.items[i].string))
2099 stale = 0;
2100
2101 if (stale) {
2102 struct ref *ref = make_linked_ref(refname, &info->stale_refs_tail);
2103 oidcpy(&ref->new_oid, oid);
2104 }
2105
2106 clean_exit:
2107 string_list_clear(&matches, 0);
2108 return 0;
2109 }
2110
2111 struct ref *get_stale_heads(struct refspec *rs, struct ref *fetch_map)
2112 {
2113 struct ref *ref, *stale_refs = NULL;
2114 struct string_list ref_names = STRING_LIST_INIT_NODUP;
2115 struct stale_heads_info info;
2116
2117 info.ref_names = &ref_names;
2118 info.stale_refs_tail = &stale_refs;
2119 info.rs = rs;
2120 for (ref = fetch_map; ref; ref = ref->next)
2121 string_list_append(&ref_names, ref->name);
2122 string_list_sort(&ref_names);
2123 for_each_ref(get_stale_heads_cb, &info);
2124 string_list_clear(&ref_names, 0);
2125 return stale_refs;
2126 }
2127
2128 /*
2129 * Compare-and-swap
2130 */
2131 static void clear_cas_option(struct push_cas_option *cas)
2132 {
2133 int i;
2134
2135 for (i = 0; i < cas->nr; i++)
2136 free(cas->entry[i].refname);
2137 free(cas->entry);
2138 memset(cas, 0, sizeof(*cas));
2139 }
2140
2141 static struct push_cas *add_cas_entry(struct push_cas_option *cas,
2142 const char *refname,
2143 size_t refnamelen)
2144 {
2145 struct push_cas *entry;
2146 ALLOC_GROW(cas->entry, cas->nr + 1, cas->alloc);
2147 entry = &cas->entry[cas->nr++];
2148 memset(entry, 0, sizeof(*entry));
2149 entry->refname = xmemdupz(refname, refnamelen);
2150 return entry;
2151 }
2152
2153 static int parse_push_cas_option(struct push_cas_option *cas, const char *arg, int unset)
2154 {
2155 const char *colon;
2156 struct push_cas *entry;
2157
2158 if (unset) {
2159 /* "--no-<option>" */
2160 clear_cas_option(cas);
2161 return 0;
2162 }
2163
2164 if (!arg) {
2165 /* just "--<option>" */
2166 cas->use_tracking_for_rest = 1;
2167 return 0;
2168 }
2169
2170 /* "--<option>=refname" or "--<option>=refname:value" */
2171 colon = strchrnul(arg, ':');
2172 entry = add_cas_entry(cas, arg, colon - arg);
2173 if (!*colon)
2174 entry->use_tracking = 1;
2175 else if (!colon[1])
2176 oidclr(&entry->expect);
2177 else if (get_oid(colon + 1, &entry->expect))
2178 return error("cannot parse expected object name '%s'", colon + 1);
2179 return 0;
2180 }
2181
2182 int parseopt_push_cas_option(const struct option *opt, const char *arg, int unset)
2183 {
2184 return parse_push_cas_option(opt->value, arg, unset);
2185 }
2186
2187 int is_empty_cas(const struct push_cas_option *cas)
2188 {
2189 return !cas->use_tracking_for_rest && !cas->nr;
2190 }
2191
2192 /*
2193 * Look at remote.fetch refspec and see if we have a remote
2194 * tracking branch for the refname there. Fill its current
2195 * value in sha1[].
2196 * If we cannot do so, return negative to signal an error.
2197 */
2198 static int remote_tracking(struct remote *remote, const char *refname,
2199 struct object_id *oid)
2200 {
2201 char *dst;
2202
2203 dst = apply_refspecs(&remote->fetch, refname);
2204 if (!dst)
2205 return -1; /* no tracking ref for refname at remote */
2206 if (read_ref(dst, oid))
2207 return -1; /* we know what the tracking ref is but we cannot read it */
2208 return 0;
2209 }
2210
2211 static void apply_cas(struct push_cas_option *cas,
2212 struct remote *remote,
2213 struct ref *ref)
2214 {
2215 int i;
2216
2217 /* Find an explicit --<option>=<name>[:<value>] entry */
2218 for (i = 0; i < cas->nr; i++) {
2219 struct push_cas *entry = &cas->entry[i];
2220 if (!refname_match(entry->refname, ref->name))
2221 continue;
2222 ref->expect_old_sha1 = 1;
2223 if (!entry->use_tracking)
2224 oidcpy(&ref->old_oid_expect, &entry->expect);
2225 else if (remote_tracking(remote, ref->name, &ref->old_oid_expect))
2226 oidclr(&ref->old_oid_expect);
2227 return;
2228 }
2229
2230 /* Are we using "--<option>" to cover all? */
2231 if (!cas->use_tracking_for_rest)
2232 return;
2233
2234 ref->expect_old_sha1 = 1;
2235 if (remote_tracking(remote, ref->name, &ref->old_oid_expect))
2236 oidclr(&ref->old_oid_expect);
2237 }
2238
2239 void apply_push_cas(struct push_cas_option *cas,
2240 struct remote *remote,
2241 struct ref *remote_refs)
2242 {
2243 struct ref *ref;
2244 for (ref = remote_refs; ref; ref = ref->next)
2245 apply_cas(cas, remote, ref);
2246 }
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