Sync with 1.5.4.2 and start 1.5.5 Release Notes
[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{
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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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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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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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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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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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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, '.');
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223 if (!subkey)
224 return 0;
896c0535 225 branch = make_branch(name, subkey - name);
cf818348 226 if (!strcmp(subkey, ".remote")) {
d2370cc2
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227 if (!value)
228 return config_error_nonbool(key);
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229 branch->remote_name = xstrdup(value);
230 if (branch == current_branch)
231 default_remote_name = branch->remote_name;
d2370cc2
JH
232 } else if (!strcmp(subkey, ".merge")) {
233 if (!value)
234 return config_error_nonbool(key);
cf818348 235 add_merge(branch, xstrdup(value));
d2370cc2 236 }
cf818348 237 return 0;
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238 }
239 if (prefixcmp(key, "remote."))
240 return 0;
241 name = key + 7;
242 subkey = strrchr(name, '.');
243 if (!subkey)
244 return error("Config with no key for remote %s", name);
245 if (*subkey == '/') {
246 warning("Config remote shorthand cannot begin with '/': %s", name);
247 return 0;
248 }
249 remote = make_remote(name, subkey - name);
250 if (!value) {
251 /* if we ever have a boolean variable, e.g. "remote.*.disabled"
252 * [remote "frotz"]
253 * disabled
254 * is a valid way to set it to true; we get NULL in value so
255 * we need to handle it here.
256 *
257 * if (!strcmp(subkey, ".disabled")) {
258 * val = git_config_bool(key, value);
259 * return 0;
260 * } else
261 *
262 */
263 return 0; /* ignore unknown booleans */
264 }
265 if (!strcmp(subkey, ".url")) {
28b91f8a 266 add_url(remote, xstrdup(value));
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267 } else if (!strcmp(subkey, ".push")) {
268 add_push_refspec(remote, xstrdup(value));
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269 } else if (!strcmp(subkey, ".fetch")) {
270 add_fetch_refspec(remote, xstrdup(value));
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DB
271 } else if (!strcmp(subkey, ".receivepack")) {
272 if (!remote->receivepack)
273 remote->receivepack = xstrdup(value);
274 else
275 error("more than one receivepack given, using the first");
0012ba21
DB
276 } else if (!strcmp(subkey, ".uploadpack")) {
277 if (!remote->uploadpack)
278 remote->uploadpack = xstrdup(value);
279 else
280 error("more than one uploadpack given, using the first");
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DB
281 } else if (!strcmp(subkey, ".tagopt")) {
282 if (!strcmp(value, "--no-tags"))
283 remote->fetch_tags = -1;
14c98218
SV
284 } else if (!strcmp(subkey, ".proxy")) {
285 remote->http_proxy = xstrdup(value);
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DB
286 }
287 return 0;
288}
289
290static void read_config(void)
291{
292 unsigned char sha1[20];
293 const char *head_ref;
294 int flag;
295 if (default_remote_name) // did this already
296 return;
297 default_remote_name = xstrdup("origin");
298 current_branch = NULL;
299 head_ref = resolve_ref("HEAD", sha1, 0, &flag);
300 if (head_ref && (flag & REF_ISSYMREF) &&
301 !prefixcmp(head_ref, "refs/heads/")) {
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302 current_branch =
303 make_branch(head_ref + strlen("refs/heads/"), 0);
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304 }
305 git_config(handle_config);
306}
307
d71ab174 308struct refspec *parse_ref_spec(int nr_refspec, const char **refspec)
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DB
309{
310 int i;
311 struct refspec *rs = xcalloc(sizeof(*rs), nr_refspec);
312 for (i = 0; i < nr_refspec; i++) {
313 const char *sp, *ep, *gp;
314 sp = refspec[i];
315 if (*sp == '+') {
316 rs[i].force = 1;
317 sp++;
318 }
319 gp = strchr(sp, '*');
320 ep = strchr(sp, ':');
321 if (gp && ep && gp > ep)
322 gp = NULL;
323 if (ep) {
324 if (ep[1]) {
325 const char *glob = strchr(ep + 1, '*');
326 if (!glob)
327 gp = NULL;
328 if (gp)
329 rs[i].dst = xstrndup(ep + 1,
330 glob - ep - 1);
331 else
332 rs[i].dst = xstrdup(ep + 1);
333 }
334 } else {
335 ep = sp + strlen(sp);
336 }
337 if (gp) {
338 rs[i].pattern = 1;
339 ep = gp;
340 }
341 rs[i].src = xstrndup(sp, ep - sp);
342 }
343 return rs;
344}
345
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DB
346static int valid_remote_nick(const char *name)
347{
348 if (!name[0] || /* not empty */
349 (name[0] == '.' && /* not "." */
350 (!name[1] || /* not ".." */
351 (name[1] == '.' && !name[2]))))
352 return 0;
353 return !strchr(name, '/'); /* no slash */
354}
355
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356struct remote *remote_get(const char *name)
357{
358 struct remote *ret;
359
360 read_config();
361 if (!name)
362 name = default_remote_name;
363 ret = make_remote(name, 0);
df93e33c 364 if (valid_remote_nick(name)) {
28b91f8a 365 if (!ret->url)
5751f490 366 read_remotes_file(ret);
28b91f8a 367 if (!ret->url)
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DB
368 read_branches_file(ret);
369 }
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SP
370 if (!ret->url)
371 add_url(ret, name);
372 if (!ret->url)
5751f490 373 return NULL;
5d46c9d4 374 ret->fetch = parse_ref_spec(ret->fetch_refspec_nr, ret->fetch_refspec);
6b62816c 375 ret->push = parse_ref_spec(ret->push_refspec_nr, ret->push_refspec);
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DB
376 return ret;
377}
6b62816c 378
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JS
379int for_each_remote(each_remote_fn fn, void *priv)
380{
381 int i, result = 0;
382 read_config();
383 for (i = 0; i < allocated_remotes && !result; i++) {
384 struct remote *r = remotes[i];
385 if (!r)
386 continue;
387 if (!r->fetch)
388 r->fetch = parse_ref_spec(r->fetch_refspec_nr,
389 r->fetch_refspec);
390 if (!r->push)
391 r->push = parse_ref_spec(r->push_refspec_nr,
392 r->push_refspec);
393 result = fn(r, priv);
394 }
395 return result;
396}
397
2467a4fa
DB
398void ref_remove_duplicates(struct ref *ref_map)
399{
400 struct ref **posn;
401 struct ref *next;
402 for (; ref_map; ref_map = ref_map->next) {
403 if (!ref_map->peer_ref)
404 continue;
405 posn = &ref_map->next;
406 while (*posn) {
407 if ((*posn)->peer_ref &&
408 !strcmp((*posn)->peer_ref->name,
409 ref_map->peer_ref->name)) {
410 if (strcmp((*posn)->name, ref_map->name))
411 die("%s tracks both %s and %s",
412 ref_map->peer_ref->name,
413 (*posn)->name, ref_map->name);
414 next = (*posn)->next;
415 free((*posn)->peer_ref);
416 free(*posn);
417 *posn = next;
418 } else {
419 posn = &(*posn)->next;
420 }
421 }
422 }
423}
424
28b91f8a 425int remote_has_url(struct remote *remote, const char *url)
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DB
426{
427 int i;
28b91f8a
SP
428 for (i = 0; i < remote->url_nr; i++) {
429 if (!strcmp(remote->url[i], url))
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DB
430 return 1;
431 }
432 return 0;
433}
434
435int remote_find_tracking(struct remote *remote, struct refspec *refspec)
436{
b42f6927
JS
437 int find_src = refspec->src == NULL;
438 char *needle, **result;
5d46c9d4 439 int i;
b42f6927
JS
440
441 if (find_src) {
009c5bcd 442 if (!refspec->dst)
b42f6927
JS
443 return error("find_tracking: need either src or dst");
444 needle = refspec->dst;
445 result = &refspec->src;
446 } else {
447 needle = refspec->src;
448 result = &refspec->dst;
449 }
450
5d46c9d4
DB
451 for (i = 0; i < remote->fetch_refspec_nr; i++) {
452 struct refspec *fetch = &remote->fetch[i];
b42f6927
JS
453 const char *key = find_src ? fetch->dst : fetch->src;
454 const char *value = find_src ? fetch->src : fetch->dst;
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DB
455 if (!fetch->dst)
456 continue;
457 if (fetch->pattern) {
b42f6927
JS
458 if (!prefixcmp(needle, key)) {
459 *result = xmalloc(strlen(value) +
460 strlen(needle) -
461 strlen(key) + 1);
462 strcpy(*result, value);
463 strcpy(*result + strlen(value),
464 needle + strlen(key));
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DB
465 refspec->force = fetch->force;
466 return 0;
467 }
b42f6927
JS
468 } else if (!strcmp(needle, key)) {
469 *result = xstrdup(value);
470 refspec->force = fetch->force;
471 return 0;
5d46c9d4
DB
472 }
473 }
5d46c9d4
DB
474 return -1;
475}
476
dfd255dd
DB
477struct ref *alloc_ref(unsigned namelen)
478{
479 struct ref *ret = xmalloc(sizeof(struct ref) + namelen);
480 memset(ret, 0, sizeof(struct ref) + namelen);
481 return ret;
482}
483
4577370e 484static struct ref *copy_ref(const struct ref *ref)
d71ab174
DB
485{
486 struct ref *ret = xmalloc(sizeof(struct ref) + strlen(ref->name) + 1);
487 memcpy(ret, ref, sizeof(struct ref) + strlen(ref->name) + 1);
488 ret->next = NULL;
489 return ret;
490}
491
4577370e
DB
492struct ref *copy_ref_list(const struct ref *ref)
493{
494 struct ref *ret = NULL;
495 struct ref **tail = &ret;
496 while (ref) {
497 *tail = copy_ref(ref);
498 ref = ref->next;
499 tail = &((*tail)->next);
500 }
501 return ret;
502}
503
dfd255dd
DB
504void free_refs(struct ref *ref)
505{
506 struct ref *next;
507 while (ref) {
508 next = ref->next;
509 if (ref->peer_ref)
510 free(ref->peer_ref);
511 free(ref);
512 ref = next;
513 }
514}
515
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DB
516static int count_refspec_match(const char *pattern,
517 struct ref *refs,
518 struct ref **matched_ref)
519{
520 int patlen = strlen(pattern);
521 struct ref *matched_weak = NULL;
522 struct ref *matched = NULL;
523 int weak_match = 0;
524 int match = 0;
525
526 for (weak_match = match = 0; refs; refs = refs->next) {
527 char *name = refs->name;
528 int namelen = strlen(name);
6b62816c 529
ae36bdcf 530 if (!refname_match(pattern, name, ref_rev_parse_rules))
6b62816c
DB
531 continue;
532
533 /* A match is "weak" if it is with refs outside
534 * heads or tags, and did not specify the pattern
535 * in full (e.g. "refs/remotes/origin/master") or at
536 * least from the toplevel (e.g. "remotes/origin/master");
537 * otherwise "git push $URL master" would result in
538 * ambiguity between remotes/origin/master and heads/master
539 * at the remote site.
540 */
541 if (namelen != patlen &&
542 patlen != namelen - 5 &&
543 prefixcmp(name, "refs/heads/") &&
544 prefixcmp(name, "refs/tags/")) {
545 /* We want to catch the case where only weak
546 * matches are found and there are multiple
547 * matches, and where more than one strong
548 * matches are found, as ambiguous. One
549 * strong match with zero or more weak matches
550 * are acceptable as a unique match.
551 */
552 matched_weak = refs;
553 weak_match++;
554 }
555 else {
556 matched = refs;
557 match++;
558 }
559 }
560 if (!matched) {
561 *matched_ref = matched_weak;
562 return weak_match;
563 }
564 else {
565 *matched_ref = matched;
566 return match;
567 }
568}
569
1d735267 570static void tail_link_ref(struct ref *ref, struct ref ***tail)
6b62816c
DB
571{
572 **tail = ref;
1d735267
DB
573 while (ref->next)
574 ref = ref->next;
6b62816c 575 *tail = &ref->next;
6b62816c
DB
576}
577
578static struct ref *try_explicit_object_name(const char *name)
579{
580 unsigned char sha1[20];
581 struct ref *ref;
582 int len;
583
584 if (!*name) {
dfd255dd 585 ref = alloc_ref(20);
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DB
586 strcpy(ref->name, "(delete)");
587 hashclr(ref->new_sha1);
588 return ref;
589 }
590 if (get_sha1(name, sha1))
591 return NULL;
592 len = strlen(name) + 1;
dfd255dd 593 ref = alloc_ref(len);
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DB
594 memcpy(ref->name, name, len);
595 hashcpy(ref->new_sha1, sha1);
596 return ref;
597}
598
1d735267 599static struct ref *make_linked_ref(const char *name, struct ref ***tail)
6b62816c 600{
1d735267 601 struct ref *ret;
163f0ee5 602 size_t len;
6b62816c 603
163f0ee5 604 len = strlen(name) + 1;
1d735267
DB
605 ret = alloc_ref(len);
606 memcpy(ret->name, name, len);
607 tail_link_ref(ret, tail);
608 return ret;
163f0ee5 609}
8558fd9e 610
54a8ad92
JH
611static int match_explicit(struct ref *src, struct ref *dst,
612 struct ref ***dst_tail,
613 struct refspec *rs,
614 int errs)
6b62816c 615{
54a8ad92 616 struct ref *matched_src, *matched_dst;
8558fd9e 617
54a8ad92 618 const char *dst_value = rs->dst;
6b62816c 619
54a8ad92
JH
620 if (rs->pattern)
621 return errs;
8558fd9e 622
54a8ad92
JH
623 matched_src = matched_dst = NULL;
624 switch (count_refspec_match(rs->src, src, &matched_src)) {
625 case 1:
626 break;
627 case 0:
628 /* The source could be in the get_sha1() format
629 * not a reference name. :refs/other is a
630 * way to delete 'other' ref at the remote end.
631 */
632 matched_src = try_explicit_object_name(rs->src);
7dfee372
SP
633 if (!matched_src)
634 error("src refspec %s does not match any.", rs->src);
54a8ad92
JH
635 break;
636 default:
3c8b7df1 637 matched_src = NULL;
7dfee372 638 error("src refspec %s matches more than one.", rs->src);
54a8ad92
JH
639 break;
640 }
3c8b7df1
JH
641
642 if (!matched_src)
643 errs = 1;
644
4491e62a
SP
645 if (!dst_value) {
646 if (!matched_src)
647 return errs;
1ed10b88 648 dst_value = matched_src->name;
4491e62a 649 }
3c8b7df1 650
54a8ad92
JH
651 switch (count_refspec_match(dst_value, dst, &matched_dst)) {
652 case 1:
653 break;
654 case 0:
163f0ee5 655 if (!memcmp(dst_value, "refs/", 5))
1d735267 656 matched_dst = make_linked_ref(dst_value, dst_tail);
3c8b7df1 657 else
54a8ad92
JH
658 error("dst refspec %s does not match any "
659 "existing ref on the remote and does "
660 "not start with refs/.", dst_value);
54a8ad92
JH
661 break;
662 default:
3c8b7df1 663 matched_dst = NULL;
54a8ad92
JH
664 error("dst refspec %s matches more than one.",
665 dst_value);
666 break;
667 }
009c5bcd 668 if (errs || !matched_dst)
3c8b7df1 669 return 1;
54a8ad92
JH
670 if (matched_dst->peer_ref) {
671 errs = 1;
672 error("dst ref %s receives from more than one src.",
673 matched_dst->name);
6b62816c 674 }
54a8ad92
JH
675 else {
676 matched_dst->peer_ref = matched_src;
677 matched_dst->force = rs->force;
6b62816c 678 }
54a8ad92
JH
679 return errs;
680}
681
682static int match_explicit_refs(struct ref *src, struct ref *dst,
683 struct ref ***dst_tail, struct refspec *rs,
684 int rs_nr)
685{
686 int i, errs;
687 for (i = errs = 0; i < rs_nr; i++)
688 errs |= match_explicit(src, dst, dst_tail, &rs[i], errs);
6b62816c
DB
689 return -errs;
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 709int match_refs(struct ref *src, struct ref *dst, struct ref ***dst_tail,
28b9d6e5 710 int nr_refspec, const char **refspec, int flags)
6b62816c
DB
711{
712 struct refspec *rs =
713 parse_ref_spec(nr_refspec, (const char **) refspec);
28b9d6e5
AW
714 int send_all = flags & MATCH_REFS_ALL;
715 int send_mirror = flags & MATCH_REFS_MIRROR;
6b62816c 716
8558fd9e
DB
717 if (match_explicit_refs(src, dst, dst_tail, rs, nr_refspec))
718 return -1;
6b62816c
DB
719
720 /* pick the remainder */
721 for ( ; src; src = src->next) {
722 struct ref *dst_peer;
6e66bf3c
AR
723 const struct refspec *pat = NULL;
724 char *dst_name;
6b62816c
DB
725 if (src->peer_ref)
726 continue;
6e66bf3c
AR
727 if (nr_refspec) {
728 pat = check_pattern_match(rs, nr_refspec, src);
729 if (!pat)
730 continue;
731 }
28b9d6e5 732 else if (!send_mirror && prefixcmp(src->name, "refs/heads/"))
098e711e
JH
733 /*
734 * "matching refs"; traditionally we pushed everything
735 * including refs outside refs/heads/ hierarchy, but
736 * that does not make much sense these days.
737 */
738 continue;
8558fd9e 739
6e66bf3c 740 if (pat) {
efd8f793
DB
741 const char *dst_side = pat->dst ? pat->dst : pat->src;
742 dst_name = xmalloc(strlen(dst_side) +
6e66bf3c
AR
743 strlen(src->name) -
744 strlen(pat->src) + 2);
efd8f793 745 strcpy(dst_name, dst_side);
6e66bf3c
AR
746 strcat(dst_name, src->name + strlen(pat->src));
747 } else
aa32eedc 748 dst_name = xstrdup(src->name);
6e66bf3c 749 dst_peer = find_ref_by_name(dst, dst_name);
8558fd9e
DB
750 if (dst_peer && dst_peer->peer_ref)
751 /* We're already sending something to this ref. */
6e66bf3c 752 goto free_name;
28b9d6e5
AW
753
754 if (!dst_peer && !nr_refspec && !(send_all || send_mirror))
755 /*
756 * Remote doesn't have it, and we have no
8558fd9e 757 * explicit pattern, and we don't have
28b9d6e5
AW
758 * --all nor --mirror.
759 */
6e66bf3c 760 goto free_name;
6b62816c
DB
761 if (!dst_peer) {
762 /* Create a new one and link it */
1d735267 763 dst_peer = make_linked_ref(dst_name, dst_tail);
6b62816c 764 hashcpy(dst_peer->new_sha1, src->new_sha1);
6b62816c
DB
765 }
766 dst_peer->peer_ref = src;
5eb73581
JK
767 if (pat)
768 dst_peer->force = pat->force;
6e66bf3c
AR
769 free_name:
770 free(dst_name);
6b62816c
DB
771 }
772 return 0;
773}
cf818348
DB
774
775struct branch *branch_get(const char *name)
776{
777 struct branch *ret;
778
779 read_config();
780 if (!name || !*name || !strcmp(name, "HEAD"))
781 ret = current_branch;
782 else
783 ret = make_branch(name, 0);
784 if (ret && ret->remote_name) {
785 ret->remote = remote_get(ret->remote_name);
786 if (ret->merge_nr) {
787 int i;
788 ret->merge = xcalloc(sizeof(*ret->merge),
789 ret->merge_nr);
790 for (i = 0; i < ret->merge_nr; i++) {
791 ret->merge[i] = xcalloc(1, sizeof(**ret->merge));
792 ret->merge[i]->src = xstrdup(ret->merge_name[i]);
793 remote_find_tracking(ret->remote,
794 ret->merge[i]);
795 }
796 }
797 }
798 return ret;
799}
800
801int branch_has_merge_config(struct branch *branch)
802{
803 return branch && !!branch->merge;
804}
805
85682c19
SP
806int branch_merge_matches(struct branch *branch,
807 int i,
808 const char *refname)
cf818348 809{
85682c19 810 if (!branch || i < 0 || i >= branch->merge_nr)
cf818348 811 return 0;
605b4978 812 return refname_match(branch->merge[i]->src, refname, ref_fetch_rules);
cf818348 813}
d71ab174 814
4577370e 815static struct ref *get_expanded_map(const struct ref *remote_refs,
d71ab174
DB
816 const struct refspec *refspec)
817{
4577370e 818 const struct ref *ref;
d71ab174
DB
819 struct ref *ret = NULL;
820 struct ref **tail = &ret;
821
822 int remote_prefix_len = strlen(refspec->src);
823 int local_prefix_len = strlen(refspec->dst);
824
825 for (ref = remote_refs; ref; ref = ref->next) {
826 if (strchr(ref->name, '^'))
827 continue; /* a dereference item */
828 if (!prefixcmp(ref->name, refspec->src)) {
4577370e 829 const char *match;
d71ab174
DB
830 struct ref *cpy = copy_ref(ref);
831 match = ref->name + remote_prefix_len;
832
833 cpy->peer_ref = alloc_ref(local_prefix_len +
834 strlen(match) + 1);
835 sprintf(cpy->peer_ref->name, "%s%s",
836 refspec->dst, match);
837 if (refspec->force)
838 cpy->peer_ref->force = 1;
839 *tail = cpy;
840 tail = &cpy->next;
841 }
842 }
843
844 return ret;
845}
846
4577370e 847static const struct ref *find_ref_by_name_abbrev(const struct ref *refs, const char *name)
d71ab174 848{
4577370e 849 const struct ref *ref;
d71ab174 850 for (ref = refs; ref; ref = ref->next) {
605b4978 851 if (refname_match(name, ref->name, ref_fetch_rules))
d71ab174
DB
852 return ref;
853 }
854 return NULL;
855}
856
4577370e 857struct ref *get_remote_ref(const struct ref *remote_refs, const char *name)
d71ab174 858{
4577370e 859 const struct ref *ref = find_ref_by_name_abbrev(remote_refs, name);
d71ab174
DB
860
861 if (!ref)
9ad7c5ae 862 return NULL;
d71ab174
DB
863
864 return copy_ref(ref);
865}
866
867static struct ref *get_local_ref(const char *name)
868{
869 struct ref *ret;
870 if (!name)
871 return NULL;
872
873 if (!prefixcmp(name, "refs/")) {
874 ret = alloc_ref(strlen(name) + 1);
875 strcpy(ret->name, name);
876 return ret;
877 }
878
879 if (!prefixcmp(name, "heads/") ||
880 !prefixcmp(name, "tags/") ||
881 !prefixcmp(name, "remotes/")) {
882 ret = alloc_ref(strlen(name) + 6);
883 sprintf(ret->name, "refs/%s", name);
884 return ret;
885 }
886
887 ret = alloc_ref(strlen(name) + 12);
888 sprintf(ret->name, "refs/heads/%s", name);
889 return ret;
890}
891
4577370e 892int get_fetch_map(const struct ref *remote_refs,
d71ab174 893 const struct refspec *refspec,
9ad7c5ae
JH
894 struct ref ***tail,
895 int missing_ok)
d71ab174
DB
896{
897 struct ref *ref_map, *rm;
898
899 if (refspec->pattern) {
900 ref_map = get_expanded_map(remote_refs, refspec);
901 } else {
9ad7c5ae
JH
902 const char *name = refspec->src[0] ? refspec->src : "HEAD";
903
904 ref_map = get_remote_ref(remote_refs, name);
905 if (!missing_ok && !ref_map)
906 die("Couldn't find remote ref %s", name);
907 if (ref_map) {
908 ref_map->peer_ref = get_local_ref(refspec->dst);
909 if (ref_map->peer_ref && refspec->force)
910 ref_map->peer_ref->force = 1;
911 }
d71ab174
DB
912 }
913
914 for (rm = ref_map; rm; rm = rm->next) {
915 if (rm->peer_ref && check_ref_format(rm->peer_ref->name + 5))
916 die("* refusing to create funny ref '%s' locally",
917 rm->peer_ref->name);
918 }
919
8f70a765
AR
920 if (ref_map)
921 tail_link_ref(ref_map, tail);
d71ab174
DB
922
923 return 0;
924}