init: show "Reinit" message even in an (existing) empty repository
[git/git.git] / remote.c
CommitLineData
5751f490
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1#include "cache.h"
2#include "remote.h"
3#include "refs.h"
4
844112ca
JH
5struct counted_string {
6 size_t len;
7 const char *s;
8};
55029ae4
DB
9struct rewrite {
10 const char *base;
844112ca
JH
11 size_t baselen;
12 struct counted_string *instead_of;
55029ae4
DB
13 int instead_of_nr;
14 int instead_of_alloc;
15};
16
5751f490 17static struct remote **remotes;
2d31347b
DB
18static int remotes_alloc;
19static int remotes_nr;
5751f490 20
cf818348 21static struct branch **branches;
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DB
22static int branches_alloc;
23static int branches_nr;
cf818348
DB
24
25static struct branch *current_branch;
26static const char *default_remote_name;
27
55029ae4
DB
28static struct rewrite **rewrite;
29static int rewrite_alloc;
30static int rewrite_nr;
31
5751f490
DB
32#define BUF_SIZE (2048)
33static char buffer[BUF_SIZE];
34
55029ae4
DB
35static const char *alias_url(const char *url)
36{
37 int i, j;
844112ca
JH
38 char *ret;
39 struct counted_string *longest;
40 int longest_i;
41
42 longest = NULL;
43 longest_i = -1;
55029ae4
DB
44 for (i = 0; i < rewrite_nr; i++) {
45 if (!rewrite[i])
46 continue;
47 for (j = 0; j < rewrite[i]->instead_of_nr; j++) {
844112ca
JH
48 if (!prefixcmp(url, rewrite[i]->instead_of[j].s) &&
49 (!longest ||
50 longest->len < rewrite[i]->instead_of[j].len)) {
51 longest = &(rewrite[i]->instead_of[j]);
52 longest_i = i;
55029ae4
DB
53 }
54 }
55 }
844112ca
JH
56 if (!longest)
57 return url;
58
59 ret = malloc(rewrite[longest_i]->baselen +
60 (strlen(url) - longest->len) + 1);
61 strcpy(ret, rewrite[longest_i]->base);
62 strcpy(ret + rewrite[longest_i]->baselen, url + longest->len);
63 return ret;
55029ae4
DB
64}
65
5751f490
DB
66static void add_push_refspec(struct remote *remote, const char *ref)
67{
2d31347b
DB
68 ALLOC_GROW(remote->push_refspec,
69 remote->push_refspec_nr + 1,
70 remote->push_refspec_alloc);
71 remote->push_refspec[remote->push_refspec_nr++] = ref;
5751f490
DB
72}
73
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DB
74static void add_fetch_refspec(struct remote *remote, const char *ref)
75{
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DB
76 ALLOC_GROW(remote->fetch_refspec,
77 remote->fetch_refspec_nr + 1,
78 remote->fetch_refspec_alloc);
79 remote->fetch_refspec[remote->fetch_refspec_nr++] = ref;
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DB
80}
81
28b91f8a 82static void add_url(struct remote *remote, const char *url)
5751f490 83{
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DB
84 ALLOC_GROW(remote->url, remote->url_nr + 1, remote->url_alloc);
85 remote->url[remote->url_nr++] = url;
5751f490
DB
86}
87
55029ae4
DB
88static void add_url_alias(struct remote *remote, const char *url)
89{
90 add_url(remote, alias_url(url));
91}
92
5751f490
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93static struct remote *make_remote(const char *name, int len)
94{
2d31347b
DB
95 struct remote *ret;
96 int i;
5751f490 97
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DB
98 for (i = 0; i < remotes_nr; i++) {
99 if (len ? (!strncmp(name, remotes[i]->name, len) &&
100 !remotes[i]->name[len]) :
101 !strcmp(name, remotes[i]->name))
102 return remotes[i];
5751f490
DB
103 }
104
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DB
105 ret = xcalloc(1, sizeof(struct remote));
106 ALLOC_GROW(remotes, remotes_nr + 1, remotes_alloc);
107 remotes[remotes_nr++] = ret;
5751f490 108 if (len)
2d31347b 109 ret->name = xstrndup(name, len);
5751f490 110 else
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DB
111 ret->name = xstrdup(name);
112 return ret;
5751f490
DB
113}
114
cf818348
DB
115static void add_merge(struct branch *branch, const char *name)
116{
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DB
117 ALLOC_GROW(branch->merge_name, branch->merge_nr + 1,
118 branch->merge_alloc);
119 branch->merge_name[branch->merge_nr++] = name;
cf818348
DB
120}
121
122static struct branch *make_branch(const char *name, int len)
123{
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DB
124 struct branch *ret;
125 int i;
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126 char *refname;
127
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DB
128 for (i = 0; i < branches_nr; i++) {
129 if (len ? (!strncmp(name, branches[i]->name, len) &&
130 !branches[i]->name[len]) :
131 !strcmp(name, branches[i]->name))
132 return branches[i];
cf818348
DB
133 }
134
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DB
135 ALLOC_GROW(branches, branches_nr + 1, branches_alloc);
136 ret = xcalloc(1, sizeof(struct branch));
137 branches[branches_nr++] = ret;
cf818348 138 if (len)
2d31347b 139 ret->name = xstrndup(name, len);
cf818348 140 else
2d31347b 141 ret->name = xstrdup(name);
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DB
142 refname = malloc(strlen(name) + strlen("refs/heads/") + 1);
143 strcpy(refname, "refs/heads/");
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DB
144 strcpy(refname + strlen("refs/heads/"), ret->name);
145 ret->refname = refname;
cf818348 146
2d31347b 147 return ret;
cf818348
DB
148}
149
55029ae4
DB
150static struct rewrite *make_rewrite(const char *base, int len)
151{
152 struct rewrite *ret;
153 int i;
154
155 for (i = 0; i < rewrite_nr; i++) {
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156 if (len
157 ? (len == rewrite[i]->baselen &&
158 !strncmp(base, rewrite[i]->base, len))
159 : !strcmp(base, rewrite[i]->base))
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DB
160 return rewrite[i];
161 }
162
163 ALLOC_GROW(rewrite, rewrite_nr + 1, rewrite_alloc);
164 ret = xcalloc(1, sizeof(struct rewrite));
165 rewrite[rewrite_nr++] = ret;
844112ca 166 if (len) {
55029ae4 167 ret->base = xstrndup(base, len);
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JH
168 ret->baselen = len;
169 }
170 else {
55029ae4 171 ret->base = xstrdup(base);
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JH
172 ret->baselen = strlen(base);
173 }
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DB
174 return ret;
175}
176
177static void add_instead_of(struct rewrite *rewrite, const char *instead_of)
178{
179 ALLOC_GROW(rewrite->instead_of, rewrite->instead_of_nr + 1, rewrite->instead_of_alloc);
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180 rewrite->instead_of[rewrite->instead_of_nr].s = instead_of;
181 rewrite->instead_of[rewrite->instead_of_nr].len = strlen(instead_of);
182 rewrite->instead_of_nr++;
55029ae4
DB
183}
184
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185static void read_remotes_file(struct remote *remote)
186{
187 FILE *f = fopen(git_path("remotes/%s", remote->name), "r");
188
189 if (!f)
190 return;
191 while (fgets(buffer, BUF_SIZE, f)) {
192 int value_list;
193 char *s, *p;
194
195 if (!prefixcmp(buffer, "URL:")) {
196 value_list = 0;
197 s = buffer + 4;
198 } else if (!prefixcmp(buffer, "Push:")) {
199 value_list = 1;
200 s = buffer + 5;
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DB
201 } else if (!prefixcmp(buffer, "Pull:")) {
202 value_list = 2;
203 s = buffer + 5;
5751f490
DB
204 } else
205 continue;
206
207 while (isspace(*s))
208 s++;
209 if (!*s)
210 continue;
211
212 p = s + strlen(s);
213 while (isspace(p[-1]))
214 *--p = 0;
215
216 switch (value_list) {
217 case 0:
55029ae4 218 add_url_alias(remote, xstrdup(s));
5751f490
DB
219 break;
220 case 1:
221 add_push_refspec(remote, xstrdup(s));
222 break;
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DB
223 case 2:
224 add_fetch_refspec(remote, xstrdup(s));
225 break;
5751f490
DB
226 }
227 }
228 fclose(f);
229}
230
231static void read_branches_file(struct remote *remote)
232{
233 const char *slash = strchr(remote->name, '/');
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DB
234 char *frag;
235 char *branch;
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236 int n = slash ? slash - remote->name : 1000;
237 FILE *f = fopen(git_path("branches/%.*s", n, remote->name), "r");
238 char *s, *p;
239 int len;
240
241 if (!f)
242 return;
243 s = fgets(buffer, BUF_SIZE, f);
244 fclose(f);
245 if (!s)
246 return;
247 while (isspace(*s))
248 s++;
249 if (!*s)
250 return;
251 p = s + strlen(s);
252 while (isspace(p[-1]))
253 *--p = 0;
254 len = p - s;
255 if (slash)
256 len += strlen(slash);
257 p = xmalloc(len + 1);
258 strcpy(p, s);
259 if (slash)
260 strcat(p, slash);
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DB
261 frag = strchr(p, '#');
262 if (frag) {
263 *(frag++) = '\0';
264 branch = xmalloc(strlen(frag) + 12);
265 strcpy(branch, "refs/heads/");
266 strcat(branch, frag);
267 } else {
268 branch = "refs/heads/master";
269 }
55029ae4 270 add_url_alias(remote, p);
cf818348 271 add_fetch_refspec(remote, branch);
d71ab174 272 remote->fetch_tags = 1; /* always auto-follow */
5751f490
DB
273}
274
5751f490
DB
275static int handle_config(const char *key, const char *value)
276{
277 const char *name;
278 const char *subkey;
279 struct remote *remote;
cf818348
DB
280 struct branch *branch;
281 if (!prefixcmp(key, "branch.")) {
282 name = key + 7;
283 subkey = strrchr(name, '.');
cf818348
DB
284 if (!subkey)
285 return 0;
896c0535 286 branch = make_branch(name, subkey - name);
cf818348 287 if (!strcmp(subkey, ".remote")) {
d2370cc2
JH
288 if (!value)
289 return config_error_nonbool(key);
cf818348
DB
290 branch->remote_name = xstrdup(value);
291 if (branch == current_branch)
292 default_remote_name = branch->remote_name;
d2370cc2
JH
293 } else if (!strcmp(subkey, ".merge")) {
294 if (!value)
295 return config_error_nonbool(key);
cf818348 296 add_merge(branch, xstrdup(value));
d2370cc2 297 }
cf818348 298 return 0;
5751f490 299 }
55029ae4
DB
300 if (!prefixcmp(key, "url.")) {
301 struct rewrite *rewrite;
302 name = key + 5;
303 subkey = strrchr(name, '.');
304 if (!subkey)
305 return 0;
306 rewrite = make_rewrite(name, subkey - name);
307 if (!strcmp(subkey, ".insteadof")) {
308 if (!value)
309 return config_error_nonbool(key);
310 add_instead_of(rewrite, xstrdup(value));
311 }
312 }
5751f490
DB
313 if (prefixcmp(key, "remote."))
314 return 0;
315 name = key + 7;
316 subkey = strrchr(name, '.');
317 if (!subkey)
318 return error("Config with no key for remote %s", name);
319 if (*subkey == '/') {
320 warning("Config remote shorthand cannot begin with '/': %s", name);
321 return 0;
322 }
323 remote = make_remote(name, subkey - name);
324 if (!value) {
325 /* if we ever have a boolean variable, e.g. "remote.*.disabled"
326 * [remote "frotz"]
327 * disabled
328 * is a valid way to set it to true; we get NULL in value so
329 * we need to handle it here.
330 *
331 * if (!strcmp(subkey, ".disabled")) {
332 * val = git_config_bool(key, value);
333 * return 0;
334 * } else
335 *
336 */
337 return 0; /* ignore unknown booleans */
338 }
339 if (!strcmp(subkey, ".url")) {
28b91f8a 340 add_url(remote, xstrdup(value));
5751f490
DB
341 } else if (!strcmp(subkey, ".push")) {
342 add_push_refspec(remote, xstrdup(value));
5d46c9d4
DB
343 } else if (!strcmp(subkey, ".fetch")) {
344 add_fetch_refspec(remote, xstrdup(value));
5751f490
DB
345 } else if (!strcmp(subkey, ".receivepack")) {
346 if (!remote->receivepack)
347 remote->receivepack = xstrdup(value);
348 else
349 error("more than one receivepack given, using the first");
0012ba21
DB
350 } else if (!strcmp(subkey, ".uploadpack")) {
351 if (!remote->uploadpack)
352 remote->uploadpack = xstrdup(value);
353 else
354 error("more than one uploadpack given, using the first");
d71ab174
DB
355 } else if (!strcmp(subkey, ".tagopt")) {
356 if (!strcmp(value, "--no-tags"))
357 remote->fetch_tags = -1;
14c98218
SV
358 } else if (!strcmp(subkey, ".proxy")) {
359 remote->http_proxy = xstrdup(value);
211c8968
JS
360 } else if (!strcmp(subkey, ".skipdefaultupdate"))
361 remote->skip_default_update = 1;
5751f490
DB
362 return 0;
363}
364
55029ae4
DB
365static void alias_all_urls(void)
366{
367 int i, j;
368 for (i = 0; i < remotes_nr; i++) {
369 if (!remotes[i])
370 continue;
371 for (j = 0; j < remotes[i]->url_nr; j++) {
372 remotes[i]->url[j] = alias_url(remotes[i]->url[j]);
373 }
374 }
375}
376
5751f490
DB
377static void read_config(void)
378{
379 unsigned char sha1[20];
380 const char *head_ref;
381 int flag;
382 if (default_remote_name) // did this already
383 return;
384 default_remote_name = xstrdup("origin");
385 current_branch = NULL;
386 head_ref = resolve_ref("HEAD", sha1, 0, &flag);
387 if (head_ref && (flag & REF_ISSYMREF) &&
388 !prefixcmp(head_ref, "refs/heads/")) {
cf818348
DB
389 current_branch =
390 make_branch(head_ref + strlen("refs/heads/"), 0);
5751f490
DB
391 }
392 git_config(handle_config);
55029ae4 393 alias_all_urls();
5751f490
DB
394}
395
46220ca1 396static struct refspec *parse_refspec_internal(int nr_refspec, const char **refspec, int fetch)
6b62816c
DB
397{
398 int i;
ef00d150 399 int st;
6b62816c 400 struct refspec *rs = xcalloc(sizeof(*rs), nr_refspec);
46220ca1 401
6b62816c 402 for (i = 0; i < nr_refspec; i++) {
46220ca1
JH
403 size_t llen, rlen;
404 int is_glob;
405 const char *lhs, *rhs;
406
407 llen = rlen = is_glob = 0;
408
409 lhs = refspec[i];
410 if (*lhs == '+') {
6b62816c 411 rs[i].force = 1;
46220ca1 412 lhs++;
6b62816c 413 }
46220ca1
JH
414
415 rhs = strrchr(lhs, ':');
416 if (rhs) {
417 rhs++;
418 rlen = strlen(rhs);
419 is_glob = (2 <= rlen && !strcmp(rhs + rlen - 2, "/*"));
420 rs[i].dst = xstrndup(rhs, rlen - is_glob * 2);
6b62816c 421 }
ef00d150 422
46220ca1
JH
423 llen = (rhs ? (rhs - lhs - 1) : strlen(lhs));
424 if (is_glob != (2 <= llen && !memcmp(lhs + llen - 2, "/*", 2)))
425 goto invalid;
426
427 if (is_glob) {
428 llen -= 2;
429 rlen -= 2;
ef00d150 430 }
46220ca1
JH
431 rs[i].pattern = is_glob;
432 rs[i].src = xstrndup(lhs, llen);
433
434 if (fetch) {
435 /*
436 * LHS
437 * - empty is allowed; it means HEAD.
438 * - otherwise it must be a valid looking ref.
439 */
440 if (!*rs[i].src)
441 ; /* empty is ok */
442 else {
443 st = check_ref_format(rs[i].src);
444 if (st && st != CHECK_REF_FORMAT_ONELEVEL)
445 goto invalid;
446 }
447 /*
448 * RHS
449 * - missing is allowed.
450 * - empty is ok; it means not to store.
451 * - otherwise it must be a valid looking ref.
452 */
453 if (!rs[i].dst) {
454 ; /* ok */
455 } else if (!*rs[i].dst) {
456 ; /* ok */
457 } else {
458 st = check_ref_format(rs[i].dst);
459 if (st && st != CHECK_REF_FORMAT_ONELEVEL)
460 goto invalid;
461 }
462 } else {
463 /*
464 * LHS
465 * - empty is allowed; it means delete.
466 * - when wildcarded, it must be a valid looking ref.
467 * - otherwise, it must be an extended SHA-1, but
468 * there is no existing way to validate this.
469 */
470 if (!*rs[i].src)
471 ; /* empty is ok */
472 else if (is_glob) {
473 st = check_ref_format(rs[i].src);
474 if (st && st != CHECK_REF_FORMAT_ONELEVEL)
475 goto invalid;
476 }
477 else
478 ; /* anything goes, for now */
479 /*
480 * RHS
481 * - missing is allowed, but LHS then must be a
482 * valid looking ref.
483 * - empty is not allowed.
484 * - otherwise it must be a valid looking ref.
485 */
486 if (!rs[i].dst) {
487 st = check_ref_format(rs[i].src);
488 if (st && st != CHECK_REF_FORMAT_ONELEVEL)
489 goto invalid;
490 } else if (!*rs[i].dst) {
491 goto invalid;
492 } else {
493 st = check_ref_format(rs[i].dst);
494 if (st && st != CHECK_REF_FORMAT_ONELEVEL)
495 goto invalid;
496 }
ef00d150 497 }
6b62816c
DB
498 }
499 return rs;
46220ca1
JH
500
501 invalid:
502 die("Invalid refspec '%s'", refspec[i]);
503}
504
505struct refspec *parse_fetch_refspec(int nr_refspec, const char **refspec)
506{
507 return parse_refspec_internal(nr_refspec, refspec, 1);
508}
509
510struct refspec *parse_push_refspec(int nr_refspec, const char **refspec)
511{
512 return parse_refspec_internal(nr_refspec, refspec, 0);
6b62816c
DB
513}
514
df93e33c
DB
515static int valid_remote_nick(const char *name)
516{
517 if (!name[0] || /* not empty */
518 (name[0] == '.' && /* not "." */
519 (!name[1] || /* not ".." */
520 (name[1] == '.' && !name[2]))))
521 return 0;
522 return !strchr(name, '/'); /* no slash */
523}
524
5751f490
DB
525struct remote *remote_get(const char *name)
526{
527 struct remote *ret;
528
529 read_config();
530 if (!name)
531 name = default_remote_name;
532 ret = make_remote(name, 0);
df93e33c 533 if (valid_remote_nick(name)) {
28b91f8a 534 if (!ret->url)
5751f490 535 read_remotes_file(ret);
28b91f8a 536 if (!ret->url)
5751f490
DB
537 read_branches_file(ret);
538 }
28b91f8a 539 if (!ret->url)
55029ae4 540 add_url_alias(ret, name);
28b91f8a 541 if (!ret->url)
5751f490 542 return NULL;
46220ca1
JH
543 ret->fetch = parse_fetch_refspec(ret->fetch_refspec_nr, ret->fetch_refspec);
544 ret->push = parse_push_refspec(ret->push_refspec_nr, ret->push_refspec);
5751f490
DB
545 return ret;
546}
6b62816c 547
b42f6927
JS
548int for_each_remote(each_remote_fn fn, void *priv)
549{
550 int i, result = 0;
551 read_config();
2d31347b 552 for (i = 0; i < remotes_nr && !result; i++) {
b42f6927
JS
553 struct remote *r = remotes[i];
554 if (!r)
555 continue;
556 if (!r->fetch)
46220ca1
JH
557 r->fetch = parse_fetch_refspec(r->fetch_refspec_nr,
558 r->fetch_refspec);
b42f6927 559 if (!r->push)
46220ca1
JH
560 r->push = parse_push_refspec(r->push_refspec_nr,
561 r->push_refspec);
b42f6927
JS
562 result = fn(r, priv);
563 }
564 return result;
565}
566
2467a4fa
DB
567void ref_remove_duplicates(struct ref *ref_map)
568{
569 struct ref **posn;
570 struct ref *next;
571 for (; ref_map; ref_map = ref_map->next) {
572 if (!ref_map->peer_ref)
573 continue;
574 posn = &ref_map->next;
575 while (*posn) {
576 if ((*posn)->peer_ref &&
577 !strcmp((*posn)->peer_ref->name,
578 ref_map->peer_ref->name)) {
579 if (strcmp((*posn)->name, ref_map->name))
580 die("%s tracks both %s and %s",
581 ref_map->peer_ref->name,
582 (*posn)->name, ref_map->name);
583 next = (*posn)->next;
584 free((*posn)->peer_ref);
585 free(*posn);
586 *posn = next;
587 } else {
588 posn = &(*posn)->next;
589 }
590 }
591 }
592}
593
28b91f8a 594int remote_has_url(struct remote *remote, const char *url)
5d46c9d4
DB
595{
596 int i;
28b91f8a
SP
597 for (i = 0; i < remote->url_nr; i++) {
598 if (!strcmp(remote->url[i], url))
5d46c9d4
DB
599 return 1;
600 }
601 return 0;
602}
603
604int remote_find_tracking(struct remote *remote, struct refspec *refspec)
605{
b42f6927
JS
606 int find_src = refspec->src == NULL;
607 char *needle, **result;
5d46c9d4 608 int i;
b42f6927
JS
609
610 if (find_src) {
009c5bcd 611 if (!refspec->dst)
b42f6927
JS
612 return error("find_tracking: need either src or dst");
613 needle = refspec->dst;
614 result = &refspec->src;
615 } else {
616 needle = refspec->src;
617 result = &refspec->dst;
618 }
619
5d46c9d4
DB
620 for (i = 0; i < remote->fetch_refspec_nr; i++) {
621 struct refspec *fetch = &remote->fetch[i];
b42f6927
JS
622 const char *key = find_src ? fetch->dst : fetch->src;
623 const char *value = find_src ? fetch->src : fetch->dst;
5d46c9d4
DB
624 if (!fetch->dst)
625 continue;
626 if (fetch->pattern) {
ef00d150
DB
627 if (!prefixcmp(needle, key) &&
628 needle[strlen(key)] == '/') {
b42f6927
JS
629 *result = xmalloc(strlen(value) +
630 strlen(needle) -
631 strlen(key) + 1);
632 strcpy(*result, value);
633 strcpy(*result + strlen(value),
634 needle + strlen(key));
5d46c9d4
DB
635 refspec->force = fetch->force;
636 return 0;
637 }
b42f6927
JS
638 } else if (!strcmp(needle, key)) {
639 *result = xstrdup(value);
640 refspec->force = fetch->force;
641 return 0;
5d46c9d4
DB
642 }
643 }
5d46c9d4
DB
644 return -1;
645}
646
dfd255dd
DB
647struct ref *alloc_ref(unsigned namelen)
648{
649 struct ref *ret = xmalloc(sizeof(struct ref) + namelen);
650 memset(ret, 0, sizeof(struct ref) + namelen);
651 return ret;
652}
653
4577370e 654static struct ref *copy_ref(const struct ref *ref)
d71ab174
DB
655{
656 struct ref *ret = xmalloc(sizeof(struct ref) + strlen(ref->name) + 1);
657 memcpy(ret, ref, sizeof(struct ref) + strlen(ref->name) + 1);
658 ret->next = NULL;
659 return ret;
660}
661
4577370e
DB
662struct ref *copy_ref_list(const struct ref *ref)
663{
664 struct ref *ret = NULL;
665 struct ref **tail = &ret;
666 while (ref) {
667 *tail = copy_ref(ref);
668 ref = ref->next;
669 tail = &((*tail)->next);
670 }
671 return ret;
672}
673
dfd255dd
DB
674void free_refs(struct ref *ref)
675{
676 struct ref *next;
677 while (ref) {
678 next = ref->next;
8e0f7003 679 free(ref->peer_ref);
dfd255dd
DB
680 free(ref);
681 ref = next;
682 }
683}
684
6b62816c
DB
685static int count_refspec_match(const char *pattern,
686 struct ref *refs,
687 struct ref **matched_ref)
688{
689 int patlen = strlen(pattern);
690 struct ref *matched_weak = NULL;
691 struct ref *matched = NULL;
692 int weak_match = 0;
693 int match = 0;
694
695 for (weak_match = match = 0; refs; refs = refs->next) {
696 char *name = refs->name;
697 int namelen = strlen(name);
6b62816c 698
ae36bdcf 699 if (!refname_match(pattern, name, ref_rev_parse_rules))
6b62816c
DB
700 continue;
701
702 /* A match is "weak" if it is with refs outside
703 * heads or tags, and did not specify the pattern
704 * in full (e.g. "refs/remotes/origin/master") or at
705 * least from the toplevel (e.g. "remotes/origin/master");
706 * otherwise "git push $URL master" would result in
707 * ambiguity between remotes/origin/master and heads/master
708 * at the remote site.
709 */
710 if (namelen != patlen &&
711 patlen != namelen - 5 &&
712 prefixcmp(name, "refs/heads/") &&
713 prefixcmp(name, "refs/tags/")) {
714 /* We want to catch the case where only weak
715 * matches are found and there are multiple
716 * matches, and where more than one strong
717 * matches are found, as ambiguous. One
718 * strong match with zero or more weak matches
719 * are acceptable as a unique match.
720 */
721 matched_weak = refs;
722 weak_match++;
723 }
724 else {
725 matched = refs;
726 match++;
727 }
728 }
729 if (!matched) {
730 *matched_ref = matched_weak;
731 return weak_match;
732 }
733 else {
734 *matched_ref = matched;
735 return match;
736 }
737}
738
1d735267 739static void tail_link_ref(struct ref *ref, struct ref ***tail)
6b62816c
DB
740{
741 **tail = ref;
1d735267
DB
742 while (ref->next)
743 ref = ref->next;
6b62816c 744 *tail = &ref->next;
6b62816c
DB
745}
746
747static struct ref *try_explicit_object_name(const char *name)
748{
749 unsigned char sha1[20];
750 struct ref *ref;
751 int len;
752
753 if (!*name) {
dfd255dd 754 ref = alloc_ref(20);
6b62816c
DB
755 strcpy(ref->name, "(delete)");
756 hashclr(ref->new_sha1);
757 return ref;
758 }
759 if (get_sha1(name, sha1))
760 return NULL;
761 len = strlen(name) + 1;
dfd255dd 762 ref = alloc_ref(len);
6b62816c
DB
763 memcpy(ref->name, name, len);
764 hashcpy(ref->new_sha1, sha1);
765 return ref;
766}
767
1d735267 768static struct ref *make_linked_ref(const char *name, struct ref ***tail)
6b62816c 769{
1d735267 770 struct ref *ret;
163f0ee5 771 size_t len;
6b62816c 772
163f0ee5 773 len = strlen(name) + 1;
1d735267
DB
774 ret = alloc_ref(len);
775 memcpy(ret->name, name, len);
776 tail_link_ref(ret, tail);
777 return ret;
163f0ee5 778}
8558fd9e 779
54a8ad92
JH
780static int match_explicit(struct ref *src, struct ref *dst,
781 struct ref ***dst_tail,
782 struct refspec *rs,
783 int errs)
6b62816c 784{
54a8ad92 785 struct ref *matched_src, *matched_dst;
8558fd9e 786
54a8ad92 787 const char *dst_value = rs->dst;
6b62816c 788
54a8ad92
JH
789 if (rs->pattern)
790 return errs;
8558fd9e 791
54a8ad92
JH
792 matched_src = matched_dst = NULL;
793 switch (count_refspec_match(rs->src, src, &matched_src)) {
794 case 1:
795 break;
796 case 0:
797 /* The source could be in the get_sha1() format
798 * not a reference name. :refs/other is a
799 * way to delete 'other' ref at the remote end.
800 */
801 matched_src = try_explicit_object_name(rs->src);
7dfee372
SP
802 if (!matched_src)
803 error("src refspec %s does not match any.", rs->src);
54a8ad92
JH
804 break;
805 default:
3c8b7df1 806 matched_src = NULL;
7dfee372 807 error("src refspec %s matches more than one.", rs->src);
54a8ad92
JH
808 break;
809 }
3c8b7df1
JH
810
811 if (!matched_src)
812 errs = 1;
813
4491e62a 814 if (!dst_value) {
9f0ea7e8
DB
815 unsigned char sha1[20];
816 int flag;
817
4491e62a
SP
818 if (!matched_src)
819 return errs;
9f0ea7e8
DB
820 dst_value = resolve_ref(matched_src->name, sha1, 1, &flag);
821 if (!dst_value ||
822 ((flag & REF_ISSYMREF) &&
823 prefixcmp(dst_value, "refs/heads/")))
824 die("%s cannot be resolved to branch.",
825 matched_src->name);
4491e62a 826 }
3c8b7df1 827
54a8ad92
JH
828 switch (count_refspec_match(dst_value, dst, &matched_dst)) {
829 case 1:
830 break;
831 case 0:
163f0ee5 832 if (!memcmp(dst_value, "refs/", 5))
1d735267 833 matched_dst = make_linked_ref(dst_value, dst_tail);
3c8b7df1 834 else
54a8ad92
JH
835 error("dst refspec %s does not match any "
836 "existing ref on the remote and does "
837 "not start with refs/.", dst_value);
54a8ad92
JH
838 break;
839 default:
3c8b7df1 840 matched_dst = NULL;
54a8ad92
JH
841 error("dst refspec %s matches more than one.",
842 dst_value);
843 break;
844 }
009c5bcd 845 if (errs || !matched_dst)
3c8b7df1 846 return 1;
54a8ad92
JH
847 if (matched_dst->peer_ref) {
848 errs = 1;
849 error("dst ref %s receives from more than one src.",
850 matched_dst->name);
6b62816c 851 }
54a8ad92
JH
852 else {
853 matched_dst->peer_ref = matched_src;
854 matched_dst->force = rs->force;
6b62816c 855 }
54a8ad92
JH
856 return errs;
857}
858
859static int match_explicit_refs(struct ref *src, struct ref *dst,
860 struct ref ***dst_tail, struct refspec *rs,
861 int rs_nr)
862{
863 int i, errs;
864 for (i = errs = 0; i < rs_nr; i++)
865 errs |= match_explicit(src, dst, dst_tail, &rs[i], errs);
6b62816c
DB
866 return -errs;
867}
868
6e66bf3c
AR
869static const struct refspec *check_pattern_match(const struct refspec *rs,
870 int rs_nr,
871 const struct ref *src)
8558fd9e
DB
872{
873 int i;
8558fd9e 874 for (i = 0; i < rs_nr; i++) {
ef00d150
DB
875 if (rs[i].pattern &&
876 !prefixcmp(src->name, rs[i].src) &&
877 src->name[strlen(rs[i].src)] == '/')
6e66bf3c 878 return rs + i;
8558fd9e 879 }
6e66bf3c 880 return NULL;
8558fd9e
DB
881}
882
54a8ad92
JH
883/*
884 * Note. This is used only by "push"; refspec matching rules for
885 * push and fetch are subtly different, so do not try to reuse it
886 * without thinking.
887 */
6b62816c 888int match_refs(struct ref *src, struct ref *dst, struct ref ***dst_tail,
28b9d6e5 889 int nr_refspec, const char **refspec, int flags)
6b62816c
DB
890{
891 struct refspec *rs =
46220ca1 892 parse_push_refspec(nr_refspec, (const char **) refspec);
28b9d6e5
AW
893 int send_all = flags & MATCH_REFS_ALL;
894 int send_mirror = flags & MATCH_REFS_MIRROR;
6b62816c 895
8558fd9e
DB
896 if (match_explicit_refs(src, dst, dst_tail, rs, nr_refspec))
897 return -1;
6b62816c
DB
898
899 /* pick the remainder */
900 for ( ; src; src = src->next) {
901 struct ref *dst_peer;
6e66bf3c
AR
902 const struct refspec *pat = NULL;
903 char *dst_name;
6b62816c
DB
904 if (src->peer_ref)
905 continue;
6e66bf3c
AR
906 if (nr_refspec) {
907 pat = check_pattern_match(rs, nr_refspec, src);
908 if (!pat)
909 continue;
910 }
28b9d6e5 911 else if (!send_mirror && prefixcmp(src->name, "refs/heads/"))
098e711e
JH
912 /*
913 * "matching refs"; traditionally we pushed everything
914 * including refs outside refs/heads/ hierarchy, but
915 * that does not make much sense these days.
916 */
917 continue;
8558fd9e 918
6e66bf3c 919 if (pat) {
efd8f793
DB
920 const char *dst_side = pat->dst ? pat->dst : pat->src;
921 dst_name = xmalloc(strlen(dst_side) +
6e66bf3c
AR
922 strlen(src->name) -
923 strlen(pat->src) + 2);
efd8f793 924 strcpy(dst_name, dst_side);
6e66bf3c
AR
925 strcat(dst_name, src->name + strlen(pat->src));
926 } else
aa32eedc 927 dst_name = xstrdup(src->name);
6e66bf3c 928 dst_peer = find_ref_by_name(dst, dst_name);
8558fd9e
DB
929 if (dst_peer && dst_peer->peer_ref)
930 /* We're already sending something to this ref. */
6e66bf3c 931 goto free_name;
28b9d6e5
AW
932
933 if (!dst_peer && !nr_refspec && !(send_all || send_mirror))
934 /*
935 * Remote doesn't have it, and we have no
8558fd9e 936 * explicit pattern, and we don't have
28b9d6e5
AW
937 * --all nor --mirror.
938 */
6e66bf3c 939 goto free_name;
6b62816c
DB
940 if (!dst_peer) {
941 /* Create a new one and link it */
1d735267 942 dst_peer = make_linked_ref(dst_name, dst_tail);
6b62816c 943 hashcpy(dst_peer->new_sha1, src->new_sha1);
6b62816c
DB
944 }
945 dst_peer->peer_ref = src;
5eb73581
JK
946 if (pat)
947 dst_peer->force = pat->force;
6e66bf3c
AR
948 free_name:
949 free(dst_name);
6b62816c
DB
950 }
951 return 0;
952}
cf818348
DB
953
954struct branch *branch_get(const char *name)
955{
956 struct branch *ret;
957
958 read_config();
959 if (!name || !*name || !strcmp(name, "HEAD"))
960 ret = current_branch;
961 else
962 ret = make_branch(name, 0);
963 if (ret && ret->remote_name) {
964 ret->remote = remote_get(ret->remote_name);
965 if (ret->merge_nr) {
966 int i;
967 ret->merge = xcalloc(sizeof(*ret->merge),
968 ret->merge_nr);
969 for (i = 0; i < ret->merge_nr; i++) {
970 ret->merge[i] = xcalloc(1, sizeof(**ret->merge));
971 ret->merge[i]->src = xstrdup(ret->merge_name[i]);
972 remote_find_tracking(ret->remote,
973 ret->merge[i]);
974 }
975 }
976 }
977 return ret;
978}
979
980int branch_has_merge_config(struct branch *branch)
981{
982 return branch && !!branch->merge;
983}
984
85682c19
SP
985int branch_merge_matches(struct branch *branch,
986 int i,
987 const char *refname)
cf818348 988{
85682c19 989 if (!branch || i < 0 || i >= branch->merge_nr)
cf818348 990 return 0;
605b4978 991 return refname_match(branch->merge[i]->src, refname, ref_fetch_rules);
cf818348 992}
d71ab174 993
4577370e 994static struct ref *get_expanded_map(const struct ref *remote_refs,
d71ab174
DB
995 const struct refspec *refspec)
996{
4577370e 997 const struct ref *ref;
d71ab174
DB
998 struct ref *ret = NULL;
999 struct ref **tail = &ret;
1000
1001 int remote_prefix_len = strlen(refspec->src);
1002 int local_prefix_len = strlen(refspec->dst);
1003
1004 for (ref = remote_refs; ref; ref = ref->next) {
1005 if (strchr(ref->name, '^'))
1006 continue; /* a dereference item */
1007 if (!prefixcmp(ref->name, refspec->src)) {
4577370e 1008 const char *match;
d71ab174
DB
1009 struct ref *cpy = copy_ref(ref);
1010 match = ref->name + remote_prefix_len;
1011
1012 cpy->peer_ref = alloc_ref(local_prefix_len +
1013 strlen(match) + 1);
1014 sprintf(cpy->peer_ref->name, "%s%s",
1015 refspec->dst, match);
1016 if (refspec->force)
1017 cpy->peer_ref->force = 1;
1018 *tail = cpy;
1019 tail = &cpy->next;
1020 }
1021 }
1022
1023 return ret;
1024}
1025
4577370e 1026static const struct ref *find_ref_by_name_abbrev(const struct ref *refs, const char *name)
d71ab174 1027{
4577370e 1028 const struct ref *ref;
d71ab174 1029 for (ref = refs; ref; ref = ref->next) {
605b4978 1030 if (refname_match(name, ref->name, ref_fetch_rules))
d71ab174
DB
1031 return ref;
1032 }
1033 return NULL;
1034}
1035
4577370e 1036struct ref *get_remote_ref(const struct ref *remote_refs, const char *name)
d71ab174 1037{
4577370e 1038 const struct ref *ref = find_ref_by_name_abbrev(remote_refs, name);
d71ab174
DB
1039
1040 if (!ref)
9ad7c5ae 1041 return NULL;
d71ab174
DB
1042
1043 return copy_ref(ref);
1044}
1045
1046static struct ref *get_local_ref(const char *name)
1047{
1048 struct ref *ret;
1049 if (!name)
1050 return NULL;
1051
1052 if (!prefixcmp(name, "refs/")) {
1053 ret = alloc_ref(strlen(name) + 1);
1054 strcpy(ret->name, name);
1055 return ret;
1056 }
1057
1058 if (!prefixcmp(name, "heads/") ||
1059 !prefixcmp(name, "tags/") ||
1060 !prefixcmp(name, "remotes/")) {
1061 ret = alloc_ref(strlen(name) + 6);
1062 sprintf(ret->name, "refs/%s", name);
1063 return ret;
1064 }
1065
1066 ret = alloc_ref(strlen(name) + 12);
1067 sprintf(ret->name, "refs/heads/%s", name);
1068 return ret;
1069}
1070
4577370e 1071int get_fetch_map(const struct ref *remote_refs,
d71ab174 1072 const struct refspec *refspec,
9ad7c5ae
JH
1073 struct ref ***tail,
1074 int missing_ok)
d71ab174 1075{
ef00d150 1076 struct ref *ref_map, **rmp;
d71ab174
DB
1077
1078 if (refspec->pattern) {
1079 ref_map = get_expanded_map(remote_refs, refspec);
1080 } else {
9ad7c5ae
JH
1081 const char *name = refspec->src[0] ? refspec->src : "HEAD";
1082
1083 ref_map = get_remote_ref(remote_refs, name);
1084 if (!missing_ok && !ref_map)
1085 die("Couldn't find remote ref %s", name);
1086 if (ref_map) {
1087 ref_map->peer_ref = get_local_ref(refspec->dst);
1088 if (ref_map->peer_ref && refspec->force)
1089 ref_map->peer_ref->force = 1;
1090 }
d71ab174
DB
1091 }
1092
ef00d150
DB
1093 for (rmp = &ref_map; *rmp; ) {
1094 if ((*rmp)->peer_ref) {
1095 int st = check_ref_format((*rmp)->peer_ref->name + 5);
1096 if (st && st != CHECK_REF_FORMAT_ONELEVEL) {
1097 struct ref *ignore = *rmp;
1098 error("* Ignoring funny ref '%s' locally",
1099 (*rmp)->peer_ref->name);
1100 *rmp = (*rmp)->next;
1101 free(ignore->peer_ref);
1102 free(ignore);
1103 continue;
1104 }
1105 }
1106 rmp = &((*rmp)->next);
d71ab174
DB
1107 }
1108
8f70a765
AR
1109 if (ref_map)
1110 tail_link_ref(ref_map, tail);
d71ab174
DB
1111
1112 return 0;
1113}