push: use same rules as git-rev-parse to resolve refspecs
[git/git.git] / remote.c
CommitLineData
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1#include "cache.h"
2#include "remote.h"
3#include "refs.h"
4
5static struct remote **remotes;
6static int allocated_remotes;
7
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8static struct branch **branches;
9static int allocated_branches;
10
11static struct branch *current_branch;
12static const char *default_remote_name;
13
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14#define BUF_SIZE (2048)
15static char buffer[BUF_SIZE];
16
17static void add_push_refspec(struct remote *remote, const char *ref)
18{
19 int nr = remote->push_refspec_nr + 1;
20 remote->push_refspec =
21 xrealloc(remote->push_refspec, nr * sizeof(char *));
22 remote->push_refspec[nr-1] = ref;
23 remote->push_refspec_nr = nr;
24}
25
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DB
26static void add_fetch_refspec(struct remote *remote, const char *ref)
27{
28 int nr = remote->fetch_refspec_nr + 1;
29 remote->fetch_refspec =
30 xrealloc(remote->fetch_refspec, nr * sizeof(char *));
31 remote->fetch_refspec[nr-1] = ref;
32 remote->fetch_refspec_nr = nr;
33}
34
28b91f8a 35static void add_url(struct remote *remote, const char *url)
5751f490 36{
28b91f8a
SP
37 int nr = remote->url_nr + 1;
38 remote->url =
39 xrealloc(remote->url, nr * sizeof(char *));
40 remote->url[nr-1] = url;
41 remote->url_nr = nr;
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DB
42}
43
44static struct remote *make_remote(const char *name, int len)
45{
46 int i, empty = -1;
47
48 for (i = 0; i < allocated_remotes; i++) {
49 if (!remotes[i]) {
50 if (empty < 0)
51 empty = i;
52 } else {
53 if (len ? (!strncmp(name, remotes[i]->name, len) &&
54 !remotes[i]->name[len]) :
55 !strcmp(name, remotes[i]->name))
56 return remotes[i];
57 }
58 }
59
60 if (empty < 0) {
61 empty = allocated_remotes;
62 allocated_remotes += allocated_remotes ? allocated_remotes : 1;
63 remotes = xrealloc(remotes,
64 sizeof(*remotes) * allocated_remotes);
65 memset(remotes + empty, 0,
66 (allocated_remotes - empty) * sizeof(*remotes));
67 }
68 remotes[empty] = xcalloc(1, sizeof(struct remote));
69 if (len)
70 remotes[empty]->name = xstrndup(name, len);
71 else
72 remotes[empty]->name = xstrdup(name);
73 return remotes[empty];
74}
75
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76static void add_merge(struct branch *branch, const char *name)
77{
78 int nr = branch->merge_nr + 1;
79 branch->merge_name =
80 xrealloc(branch->merge_name, nr * sizeof(char *));
81 branch->merge_name[nr-1] = name;
82 branch->merge_nr = nr;
83}
84
85static struct branch *make_branch(const char *name, int len)
86{
87 int i, empty = -1;
88 char *refname;
89
90 for (i = 0; i < allocated_branches; i++) {
91 if (!branches[i]) {
92 if (empty < 0)
93 empty = i;
94 } else {
95 if (len ? (!strncmp(name, branches[i]->name, len) &&
96 !branches[i]->name[len]) :
97 !strcmp(name, branches[i]->name))
98 return branches[i];
99 }
100 }
101
102 if (empty < 0) {
103 empty = allocated_branches;
104 allocated_branches += allocated_branches ? allocated_branches : 1;
105 branches = xrealloc(branches,
106 sizeof(*branches) * allocated_branches);
107 memset(branches + empty, 0,
108 (allocated_branches - empty) * sizeof(*branches));
109 }
110 branches[empty] = xcalloc(1, sizeof(struct branch));
111 if (len)
112 branches[empty]->name = xstrndup(name, len);
113 else
114 branches[empty]->name = xstrdup(name);
115 refname = malloc(strlen(name) + strlen("refs/heads/") + 1);
116 strcpy(refname, "refs/heads/");
117 strcpy(refname + strlen("refs/heads/"),
118 branches[empty]->name);
119 branches[empty]->refname = refname;
120
121 return branches[empty];
122}
123
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124static void read_remotes_file(struct remote *remote)
125{
126 FILE *f = fopen(git_path("remotes/%s", remote->name), "r");
127
128 if (!f)
129 return;
130 while (fgets(buffer, BUF_SIZE, f)) {
131 int value_list;
132 char *s, *p;
133
134 if (!prefixcmp(buffer, "URL:")) {
135 value_list = 0;
136 s = buffer + 4;
137 } else if (!prefixcmp(buffer, "Push:")) {
138 value_list = 1;
139 s = buffer + 5;
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DB
140 } else if (!prefixcmp(buffer, "Pull:")) {
141 value_list = 2;
142 s = buffer + 5;
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DB
143 } else
144 continue;
145
146 while (isspace(*s))
147 s++;
148 if (!*s)
149 continue;
150
151 p = s + strlen(s);
152 while (isspace(p[-1]))
153 *--p = 0;
154
155 switch (value_list) {
156 case 0:
28b91f8a 157 add_url(remote, xstrdup(s));
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DB
158 break;
159 case 1:
160 add_push_refspec(remote, xstrdup(s));
161 break;
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162 case 2:
163 add_fetch_refspec(remote, xstrdup(s));
164 break;
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DB
165 }
166 }
167 fclose(f);
168}
169
170static void read_branches_file(struct remote *remote)
171{
172 const char *slash = strchr(remote->name, '/');
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173 char *frag;
174 char *branch;
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175 int n = slash ? slash - remote->name : 1000;
176 FILE *f = fopen(git_path("branches/%.*s", n, remote->name), "r");
177 char *s, *p;
178 int len;
179
180 if (!f)
181 return;
182 s = fgets(buffer, BUF_SIZE, f);
183 fclose(f);
184 if (!s)
185 return;
186 while (isspace(*s))
187 s++;
188 if (!*s)
189 return;
190 p = s + strlen(s);
191 while (isspace(p[-1]))
192 *--p = 0;
193 len = p - s;
194 if (slash)
195 len += strlen(slash);
196 p = xmalloc(len + 1);
197 strcpy(p, s);
198 if (slash)
199 strcat(p, slash);
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200 frag = strchr(p, '#');
201 if (frag) {
202 *(frag++) = '\0';
203 branch = xmalloc(strlen(frag) + 12);
204 strcpy(branch, "refs/heads/");
205 strcat(branch, frag);
206 } else {
207 branch = "refs/heads/master";
208 }
28b91f8a 209 add_url(remote, p);
cf818348 210 add_fetch_refspec(remote, branch);
d71ab174 211 remote->fetch_tags = 1; /* always auto-follow */
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DB
212}
213
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214static int handle_config(const char *key, const char *value)
215{
216 const char *name;
217 const char *subkey;
218 struct remote *remote;
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219 struct branch *branch;
220 if (!prefixcmp(key, "branch.")) {
221 name = key + 7;
222 subkey = strrchr(name, '.');
223 branch = make_branch(name, subkey - name);
224 if (!subkey)
225 return 0;
226 if (!value)
227 return 0;
228 if (!strcmp(subkey, ".remote")) {
229 branch->remote_name = xstrdup(value);
230 if (branch == current_branch)
231 default_remote_name = branch->remote_name;
232 } else if (!strcmp(subkey, ".merge"))
233 add_merge(branch, xstrdup(value));
234 return 0;
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DB
235 }
236 if (prefixcmp(key, "remote."))
237 return 0;
238 name = key + 7;
239 subkey = strrchr(name, '.');
240 if (!subkey)
241 return error("Config with no key for remote %s", name);
242 if (*subkey == '/') {
243 warning("Config remote shorthand cannot begin with '/': %s", name);
244 return 0;
245 }
246 remote = make_remote(name, subkey - name);
247 if (!value) {
248 /* if we ever have a boolean variable, e.g. "remote.*.disabled"
249 * [remote "frotz"]
250 * disabled
251 * is a valid way to set it to true; we get NULL in value so
252 * we need to handle it here.
253 *
254 * if (!strcmp(subkey, ".disabled")) {
255 * val = git_config_bool(key, value);
256 * return 0;
257 * } else
258 *
259 */
260 return 0; /* ignore unknown booleans */
261 }
262 if (!strcmp(subkey, ".url")) {
28b91f8a 263 add_url(remote, xstrdup(value));
5751f490
DB
264 } else if (!strcmp(subkey, ".push")) {
265 add_push_refspec(remote, xstrdup(value));
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DB
266 } else if (!strcmp(subkey, ".fetch")) {
267 add_fetch_refspec(remote, xstrdup(value));
5751f490
DB
268 } else if (!strcmp(subkey, ".receivepack")) {
269 if (!remote->receivepack)
270 remote->receivepack = xstrdup(value);
271 else
272 error("more than one receivepack given, using the first");
0012ba21
DB
273 } else if (!strcmp(subkey, ".uploadpack")) {
274 if (!remote->uploadpack)
275 remote->uploadpack = xstrdup(value);
276 else
277 error("more than one uploadpack given, using the first");
d71ab174
DB
278 } else if (!strcmp(subkey, ".tagopt")) {
279 if (!strcmp(value, "--no-tags"))
280 remote->fetch_tags = -1;
5751f490
DB
281 }
282 return 0;
283}
284
285static void read_config(void)
286{
287 unsigned char sha1[20];
288 const char *head_ref;
289 int flag;
290 if (default_remote_name) // did this already
291 return;
292 default_remote_name = xstrdup("origin");
293 current_branch = NULL;
294 head_ref = resolve_ref("HEAD", sha1, 0, &flag);
295 if (head_ref && (flag & REF_ISSYMREF) &&
296 !prefixcmp(head_ref, "refs/heads/")) {
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DB
297 current_branch =
298 make_branch(head_ref + strlen("refs/heads/"), 0);
5751f490
DB
299 }
300 git_config(handle_config);
301}
302
d71ab174 303struct refspec *parse_ref_spec(int nr_refspec, const char **refspec)
6b62816c
DB
304{
305 int i;
306 struct refspec *rs = xcalloc(sizeof(*rs), nr_refspec);
307 for (i = 0; i < nr_refspec; i++) {
308 const char *sp, *ep, *gp;
309 sp = refspec[i];
310 if (*sp == '+') {
311 rs[i].force = 1;
312 sp++;
313 }
314 gp = strchr(sp, '*');
315 ep = strchr(sp, ':');
316 if (gp && ep && gp > ep)
317 gp = NULL;
318 if (ep) {
319 if (ep[1]) {
320 const char *glob = strchr(ep + 1, '*');
321 if (!glob)
322 gp = NULL;
323 if (gp)
324 rs[i].dst = xstrndup(ep + 1,
325 glob - ep - 1);
326 else
327 rs[i].dst = xstrdup(ep + 1);
328 }
329 } else {
330 ep = sp + strlen(sp);
331 }
332 if (gp) {
333 rs[i].pattern = 1;
334 ep = gp;
335 }
336 rs[i].src = xstrndup(sp, ep - sp);
337 }
338 return rs;
339}
340
5751f490
DB
341struct remote *remote_get(const char *name)
342{
343 struct remote *ret;
344
345 read_config();
346 if (!name)
347 name = default_remote_name;
348 ret = make_remote(name, 0);
349 if (name[0] != '/') {
28b91f8a 350 if (!ret->url)
5751f490 351 read_remotes_file(ret);
28b91f8a 352 if (!ret->url)
5751f490
DB
353 read_branches_file(ret);
354 }
28b91f8a
SP
355 if (!ret->url)
356 add_url(ret, name);
357 if (!ret->url)
5751f490 358 return NULL;
5d46c9d4 359 ret->fetch = parse_ref_spec(ret->fetch_refspec_nr, ret->fetch_refspec);
6b62816c 360 ret->push = parse_ref_spec(ret->push_refspec_nr, ret->push_refspec);
5751f490
DB
361 return ret;
362}
6b62816c 363
b42f6927
JS
364int for_each_remote(each_remote_fn fn, void *priv)
365{
366 int i, result = 0;
367 read_config();
368 for (i = 0; i < allocated_remotes && !result; i++) {
369 struct remote *r = remotes[i];
370 if (!r)
371 continue;
372 if (!r->fetch)
373 r->fetch = parse_ref_spec(r->fetch_refspec_nr,
374 r->fetch_refspec);
375 if (!r->push)
376 r->push = parse_ref_spec(r->push_refspec_nr,
377 r->push_refspec);
378 result = fn(r, priv);
379 }
380 return result;
381}
382
2467a4fa
DB
383void ref_remove_duplicates(struct ref *ref_map)
384{
385 struct ref **posn;
386 struct ref *next;
387 for (; ref_map; ref_map = ref_map->next) {
388 if (!ref_map->peer_ref)
389 continue;
390 posn = &ref_map->next;
391 while (*posn) {
392 if ((*posn)->peer_ref &&
393 !strcmp((*posn)->peer_ref->name,
394 ref_map->peer_ref->name)) {
395 if (strcmp((*posn)->name, ref_map->name))
396 die("%s tracks both %s and %s",
397 ref_map->peer_ref->name,
398 (*posn)->name, ref_map->name);
399 next = (*posn)->next;
400 free((*posn)->peer_ref);
401 free(*posn);
402 *posn = next;
403 } else {
404 posn = &(*posn)->next;
405 }
406 }
407 }
408}
409
28b91f8a 410int remote_has_url(struct remote *remote, const char *url)
5d46c9d4
DB
411{
412 int i;
28b91f8a
SP
413 for (i = 0; i < remote->url_nr; i++) {
414 if (!strcmp(remote->url[i], url))
5d46c9d4
DB
415 return 1;
416 }
417 return 0;
418}
419
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DB
420/*
421 * Returns true if, under the matching rules for fetching, name is the
422 * same as the given full name.
423 */
424static int ref_matches_abbrev(const char *name, const char *full)
425{
426 if (!prefixcmp(name, "refs/") || !strcmp(name, "HEAD"))
427 return !strcmp(name, full);
428 if (prefixcmp(full, "refs/"))
429 return 0;
430 if (!prefixcmp(name, "heads/") ||
431 !prefixcmp(name, "tags/") ||
432 !prefixcmp(name, "remotes/"))
433 return !strcmp(name, full + 5);
434 if (prefixcmp(full + 5, "heads/"))
435 return 0;
436 return !strcmp(full + 11, name);
437}
438
5d46c9d4
DB
439int remote_find_tracking(struct remote *remote, struct refspec *refspec)
440{
b42f6927
JS
441 int find_src = refspec->src == NULL;
442 char *needle, **result;
5d46c9d4 443 int i;
b42f6927
JS
444
445 if (find_src) {
009c5bcd 446 if (!refspec->dst)
b42f6927
JS
447 return error("find_tracking: need either src or dst");
448 needle = refspec->dst;
449 result = &refspec->src;
450 } else {
451 needle = refspec->src;
452 result = &refspec->dst;
453 }
454
5d46c9d4
DB
455 for (i = 0; i < remote->fetch_refspec_nr; i++) {
456 struct refspec *fetch = &remote->fetch[i];
b42f6927
JS
457 const char *key = find_src ? fetch->dst : fetch->src;
458 const char *value = find_src ? fetch->src : fetch->dst;
5d46c9d4
DB
459 if (!fetch->dst)
460 continue;
461 if (fetch->pattern) {
b42f6927
JS
462 if (!prefixcmp(needle, key)) {
463 *result = xmalloc(strlen(value) +
464 strlen(needle) -
465 strlen(key) + 1);
466 strcpy(*result, value);
467 strcpy(*result + strlen(value),
468 needle + strlen(key));
5d46c9d4
DB
469 refspec->force = fetch->force;
470 return 0;
471 }
b42f6927
JS
472 } else if (!strcmp(needle, key)) {
473 *result = xstrdup(value);
474 refspec->force = fetch->force;
475 return 0;
5d46c9d4
DB
476 }
477 }
5d46c9d4
DB
478 return -1;
479}
480
dfd255dd
DB
481struct ref *alloc_ref(unsigned namelen)
482{
483 struct ref *ret = xmalloc(sizeof(struct ref) + namelen);
484 memset(ret, 0, sizeof(struct ref) + namelen);
485 return ret;
486}
487
d71ab174
DB
488static struct ref *copy_ref(struct ref *ref)
489{
490 struct ref *ret = xmalloc(sizeof(struct ref) + strlen(ref->name) + 1);
491 memcpy(ret, ref, sizeof(struct ref) + strlen(ref->name) + 1);
492 ret->next = NULL;
493 return ret;
494}
495
dfd255dd
DB
496void free_refs(struct ref *ref)
497{
498 struct ref *next;
499 while (ref) {
500 next = ref->next;
501 if (ref->peer_ref)
502 free(ref->peer_ref);
503 free(ref);
504 ref = next;
505 }
506}
507
6b62816c
DB
508static int count_refspec_match(const char *pattern,
509 struct ref *refs,
510 struct ref **matched_ref)
511{
512 int patlen = strlen(pattern);
513 struct ref *matched_weak = NULL;
514 struct ref *matched = NULL;
515 int weak_match = 0;
516 int match = 0;
517
518 for (weak_match = match = 0; refs; refs = refs->next) {
519 char *name = refs->name;
520 int namelen = strlen(name);
6b62816c 521
ae36bdcf 522 if (!refname_match(pattern, name, ref_rev_parse_rules))
6b62816c
DB
523 continue;
524
525 /* A match is "weak" if it is with refs outside
526 * heads or tags, and did not specify the pattern
527 * in full (e.g. "refs/remotes/origin/master") or at
528 * least from the toplevel (e.g. "remotes/origin/master");
529 * otherwise "git push $URL master" would result in
530 * ambiguity between remotes/origin/master and heads/master
531 * at the remote site.
532 */
533 if (namelen != patlen &&
534 patlen != namelen - 5 &&
535 prefixcmp(name, "refs/heads/") &&
536 prefixcmp(name, "refs/tags/")) {
537 /* We want to catch the case where only weak
538 * matches are found and there are multiple
539 * matches, and where more than one strong
540 * matches are found, as ambiguous. One
541 * strong match with zero or more weak matches
542 * are acceptable as a unique match.
543 */
544 matched_weak = refs;
545 weak_match++;
546 }
547 else {
548 matched = refs;
549 match++;
550 }
551 }
552 if (!matched) {
553 *matched_ref = matched_weak;
554 return weak_match;
555 }
556 else {
557 *matched_ref = matched;
558 return match;
559 }
560}
561
1d735267 562static void tail_link_ref(struct ref *ref, struct ref ***tail)
6b62816c
DB
563{
564 **tail = ref;
1d735267
DB
565 while (ref->next)
566 ref = ref->next;
6b62816c 567 *tail = &ref->next;
6b62816c
DB
568}
569
570static struct ref *try_explicit_object_name(const char *name)
571{
572 unsigned char sha1[20];
573 struct ref *ref;
574 int len;
575
576 if (!*name) {
dfd255dd 577 ref = alloc_ref(20);
6b62816c
DB
578 strcpy(ref->name, "(delete)");
579 hashclr(ref->new_sha1);
580 return ref;
581 }
582 if (get_sha1(name, sha1))
583 return NULL;
584 len = strlen(name) + 1;
dfd255dd 585 ref = alloc_ref(len);
6b62816c
DB
586 memcpy(ref->name, name, len);
587 hashcpy(ref->new_sha1, sha1);
588 return ref;
589}
590
1d735267 591static struct ref *make_linked_ref(const char *name, struct ref ***tail)
6b62816c 592{
1d735267 593 struct ref *ret;
163f0ee5 594 size_t len;
6b62816c 595
163f0ee5 596 len = strlen(name) + 1;
1d735267
DB
597 ret = alloc_ref(len);
598 memcpy(ret->name, name, len);
599 tail_link_ref(ret, tail);
600 return ret;
163f0ee5 601}
8558fd9e 602
54a8ad92
JH
603static int match_explicit(struct ref *src, struct ref *dst,
604 struct ref ***dst_tail,
605 struct refspec *rs,
606 int errs)
6b62816c 607{
54a8ad92 608 struct ref *matched_src, *matched_dst;
8558fd9e 609
54a8ad92 610 const char *dst_value = rs->dst;
6b62816c 611
54a8ad92
JH
612 if (rs->pattern)
613 return errs;
8558fd9e 614
54a8ad92
JH
615 matched_src = matched_dst = NULL;
616 switch (count_refspec_match(rs->src, src, &matched_src)) {
617 case 1:
618 break;
619 case 0:
620 /* The source could be in the get_sha1() format
621 * not a reference name. :refs/other is a
622 * way to delete 'other' ref at the remote end.
623 */
624 matched_src = try_explicit_object_name(rs->src);
7dfee372
SP
625 if (!matched_src)
626 error("src refspec %s does not match any.", rs->src);
54a8ad92
JH
627 break;
628 default:
3c8b7df1 629 matched_src = NULL;
7dfee372 630 error("src refspec %s matches more than one.", rs->src);
54a8ad92
JH
631 break;
632 }
3c8b7df1
JH
633
634 if (!matched_src)
635 errs = 1;
636
4491e62a
SP
637 if (!dst_value) {
638 if (!matched_src)
639 return errs;
1ed10b88 640 dst_value = matched_src->name;
4491e62a 641 }
3c8b7df1 642
54a8ad92
JH
643 switch (count_refspec_match(dst_value, dst, &matched_dst)) {
644 case 1:
645 break;
646 case 0:
163f0ee5 647 if (!memcmp(dst_value, "refs/", 5))
1d735267 648 matched_dst = make_linked_ref(dst_value, dst_tail);
3c8b7df1 649 else
54a8ad92
JH
650 error("dst refspec %s does not match any "
651 "existing ref on the remote and does "
652 "not start with refs/.", dst_value);
54a8ad92
JH
653 break;
654 default:
3c8b7df1 655 matched_dst = NULL;
54a8ad92
JH
656 error("dst refspec %s matches more than one.",
657 dst_value);
658 break;
659 }
009c5bcd 660 if (errs || !matched_dst)
3c8b7df1 661 return 1;
54a8ad92
JH
662 if (matched_dst->peer_ref) {
663 errs = 1;
664 error("dst ref %s receives from more than one src.",
665 matched_dst->name);
6b62816c 666 }
54a8ad92
JH
667 else {
668 matched_dst->peer_ref = matched_src;
669 matched_dst->force = rs->force;
6b62816c 670 }
54a8ad92
JH
671 return errs;
672}
673
674static int match_explicit_refs(struct ref *src, struct ref *dst,
675 struct ref ***dst_tail, struct refspec *rs,
676 int rs_nr)
677{
678 int i, errs;
679 for (i = errs = 0; i < rs_nr; i++)
680 errs |= match_explicit(src, dst, dst_tail, &rs[i], errs);
6b62816c
DB
681 return -errs;
682}
683
684static struct ref *find_ref_by_name(struct ref *list, const char *name)
685{
686 for ( ; list; list = list->next)
687 if (!strcmp(list->name, name))
688 return list;
689 return NULL;
690}
691
6e66bf3c
AR
692static const struct refspec *check_pattern_match(const struct refspec *rs,
693 int rs_nr,
694 const struct ref *src)
8558fd9e
DB
695{
696 int i;
8558fd9e
DB
697 for (i = 0; i < rs_nr; i++) {
698 if (rs[i].pattern && !prefixcmp(src->name, rs[i].src))
6e66bf3c 699 return rs + i;
8558fd9e 700 }
6e66bf3c 701 return NULL;
8558fd9e
DB
702}
703
54a8ad92
JH
704/*
705 * Note. This is used only by "push"; refspec matching rules for
706 * push and fetch are subtly different, so do not try to reuse it
707 * without thinking.
708 */
6b62816c
DB
709int match_refs(struct ref *src, struct ref *dst, struct ref ***dst_tail,
710 int nr_refspec, char **refspec, int all)
711{
712 struct refspec *rs =
713 parse_ref_spec(nr_refspec, (const char **) refspec);
714
8558fd9e
DB
715 if (match_explicit_refs(src, dst, dst_tail, rs, nr_refspec))
716 return -1;
6b62816c
DB
717
718 /* pick the remainder */
719 for ( ; src; src = src->next) {
720 struct ref *dst_peer;
6e66bf3c
AR
721 const struct refspec *pat = NULL;
722 char *dst_name;
6b62816c
DB
723 if (src->peer_ref)
724 continue;
6e66bf3c
AR
725 if (nr_refspec) {
726 pat = check_pattern_match(rs, nr_refspec, src);
727 if (!pat)
728 continue;
729 }
098e711e
JH
730 else if (prefixcmp(src->name, "refs/heads/"))
731 /*
732 * "matching refs"; traditionally we pushed everything
733 * including refs outside refs/heads/ hierarchy, but
734 * that does not make much sense these days.
735 */
736 continue;
8558fd9e 737
6e66bf3c 738 if (pat) {
efd8f793
DB
739 const char *dst_side = pat->dst ? pat->dst : pat->src;
740 dst_name = xmalloc(strlen(dst_side) +
6e66bf3c
AR
741 strlen(src->name) -
742 strlen(pat->src) + 2);
efd8f793 743 strcpy(dst_name, dst_side);
6e66bf3c
AR
744 strcat(dst_name, src->name + strlen(pat->src));
745 } else
aa32eedc 746 dst_name = xstrdup(src->name);
6e66bf3c 747 dst_peer = find_ref_by_name(dst, dst_name);
8558fd9e
DB
748 if (dst_peer && dst_peer->peer_ref)
749 /* We're already sending something to this ref. */
6e66bf3c 750 goto free_name;
8558fd9e
DB
751 if (!dst_peer && !nr_refspec && !all)
752 /* Remote doesn't have it, and we have no
753 * explicit pattern, and we don't have
754 * --all. */
6e66bf3c 755 goto free_name;
6b62816c
DB
756 if (!dst_peer) {
757 /* Create a new one and link it */
1d735267 758 dst_peer = make_linked_ref(dst_name, dst_tail);
6b62816c 759 hashcpy(dst_peer->new_sha1, src->new_sha1);
6b62816c
DB
760 }
761 dst_peer->peer_ref = src;
5eb73581
JK
762 if (pat)
763 dst_peer->force = pat->force;
6e66bf3c
AR
764 free_name:
765 free(dst_name);
6b62816c
DB
766 }
767 return 0;
768}
cf818348
DB
769
770struct branch *branch_get(const char *name)
771{
772 struct branch *ret;
773
774 read_config();
775 if (!name || !*name || !strcmp(name, "HEAD"))
776 ret = current_branch;
777 else
778 ret = make_branch(name, 0);
779 if (ret && ret->remote_name) {
780 ret->remote = remote_get(ret->remote_name);
781 if (ret->merge_nr) {
782 int i;
783 ret->merge = xcalloc(sizeof(*ret->merge),
784 ret->merge_nr);
785 for (i = 0; i < ret->merge_nr; i++) {
786 ret->merge[i] = xcalloc(1, sizeof(**ret->merge));
787 ret->merge[i]->src = xstrdup(ret->merge_name[i]);
788 remote_find_tracking(ret->remote,
789 ret->merge[i]);
790 }
791 }
792 }
793 return ret;
794}
795
796int branch_has_merge_config(struct branch *branch)
797{
798 return branch && !!branch->merge;
799}
800
85682c19
SP
801int branch_merge_matches(struct branch *branch,
802 int i,
803 const char *refname)
cf818348 804{
85682c19 805 if (!branch || i < 0 || i >= branch->merge_nr)
cf818348 806 return 0;
85682c19 807 return ref_matches_abbrev(branch->merge[i]->src, refname);
cf818348 808}
d71ab174
DB
809
810static struct ref *get_expanded_map(struct ref *remote_refs,
811 const struct refspec *refspec)
812{
813 struct ref *ref;
814 struct ref *ret = NULL;
815 struct ref **tail = &ret;
816
817 int remote_prefix_len = strlen(refspec->src);
818 int local_prefix_len = strlen(refspec->dst);
819
820 for (ref = remote_refs; ref; ref = ref->next) {
821 if (strchr(ref->name, '^'))
822 continue; /* a dereference item */
823 if (!prefixcmp(ref->name, refspec->src)) {
824 char *match;
825 struct ref *cpy = copy_ref(ref);
826 match = ref->name + remote_prefix_len;
827
828 cpy->peer_ref = alloc_ref(local_prefix_len +
829 strlen(match) + 1);
830 sprintf(cpy->peer_ref->name, "%s%s",
831 refspec->dst, match);
832 if (refspec->force)
833 cpy->peer_ref->force = 1;
834 *tail = cpy;
835 tail = &cpy->next;
836 }
837 }
838
839 return ret;
840}
841
842static struct ref *find_ref_by_name_abbrev(struct ref *refs, const char *name)
843{
844 struct ref *ref;
845 for (ref = refs; ref; ref = ref->next) {
846 if (ref_matches_abbrev(name, ref->name))
847 return ref;
848 }
849 return NULL;
850}
851
852struct ref *get_remote_ref(struct ref *remote_refs, const char *name)
853{
854 struct ref *ref = find_ref_by_name_abbrev(remote_refs, name);
855
856 if (!ref)
9ad7c5ae 857 return NULL;
d71ab174
DB
858
859 return copy_ref(ref);
860}
861
862static struct ref *get_local_ref(const char *name)
863{
864 struct ref *ret;
865 if (!name)
866 return NULL;
867
868 if (!prefixcmp(name, "refs/")) {
869 ret = alloc_ref(strlen(name) + 1);
870 strcpy(ret->name, name);
871 return ret;
872 }
873
874 if (!prefixcmp(name, "heads/") ||
875 !prefixcmp(name, "tags/") ||
876 !prefixcmp(name, "remotes/")) {
877 ret = alloc_ref(strlen(name) + 6);
878 sprintf(ret->name, "refs/%s", name);
879 return ret;
880 }
881
882 ret = alloc_ref(strlen(name) + 12);
883 sprintf(ret->name, "refs/heads/%s", name);
884 return ret;
885}
886
887int get_fetch_map(struct ref *remote_refs,
888 const struct refspec *refspec,
9ad7c5ae
JH
889 struct ref ***tail,
890 int missing_ok)
d71ab174
DB
891{
892 struct ref *ref_map, *rm;
893
894 if (refspec->pattern) {
895 ref_map = get_expanded_map(remote_refs, refspec);
896 } else {
9ad7c5ae
JH
897 const char *name = refspec->src[0] ? refspec->src : "HEAD";
898
899 ref_map = get_remote_ref(remote_refs, name);
900 if (!missing_ok && !ref_map)
901 die("Couldn't find remote ref %s", name);
902 if (ref_map) {
903 ref_map->peer_ref = get_local_ref(refspec->dst);
904 if (ref_map->peer_ref && refspec->force)
905 ref_map->peer_ref->force = 1;
906 }
d71ab174
DB
907 }
908
909 for (rm = ref_map; rm; rm = rm->next) {
910 if (rm->peer_ref && check_ref_format(rm->peer_ref->name + 5))
911 die("* refusing to create funny ref '%s' locally",
912 rm->peer_ref->name);
913 }
914
8f70a765
AR
915 if (ref_map)
916 tail_link_ref(ref_map, tail);
d71ab174
DB
917
918 return 0;
919}