t5541-http-push.sh: add test for unmatched, non-fast-forwarded refs
[git/git.git] / remote.c
CommitLineData
5751f490
DB
1#include "cache.h"
2#include "remote.h"
3#include "refs.h"
6d21bf96
JH
4#include "commit.h"
5#include "diff.h"
6#include "revision.h"
8ca12c0d 7#include "dir.h"
ec8452d5 8#include "tag.h"
73cf0822 9#include "string-list.h"
5751f490 10
e0aaa29f
DB
11static struct refspec s_tag_refspec = {
12 0,
13 1,
b84c343c 14 0,
08fbdb30
DB
15 "refs/tags/*",
16 "refs/tags/*"
e0aaa29f
DB
17};
18
19const struct refspec *tag_refspec = &s_tag_refspec;
20
844112ca
JH
21struct counted_string {
22 size_t len;
23 const char *s;
24};
55029ae4
DB
25struct rewrite {
26 const char *base;
844112ca
JH
27 size_t baselen;
28 struct counted_string *instead_of;
55029ae4
DB
29 int instead_of_nr;
30 int instead_of_alloc;
31};
d071d942
JT
32struct rewrites {
33 struct rewrite **rewrite;
34 int rewrite_alloc;
35 int rewrite_nr;
36};
55029ae4 37
5751f490 38static struct remote **remotes;
2d31347b
DB
39static int remotes_alloc;
40static int remotes_nr;
5751f490 41
cf818348 42static struct branch **branches;
2d31347b
DB
43static int branches_alloc;
44static int branches_nr;
cf818348
DB
45
46static struct branch *current_branch;
47static const char *default_remote_name;
fa685bdf 48static int explicit_default_remote_name;
cf818348 49
d071d942 50static struct rewrites rewrites;
1c2eafb8 51static struct rewrites rewrites_push;
55029ae4 52
5751f490
DB
53#define BUF_SIZE (2048)
54static char buffer[BUF_SIZE];
55
0a4da29d
DB
56static int valid_remote(const struct remote *remote)
57{
c578f51d 58 return (!!remote->url) || (!!remote->foreign_vcs);
0a4da29d
DB
59}
60
d071d942 61static const char *alias_url(const char *url, struct rewrites *r)
55029ae4
DB
62{
63 int i, j;
844112ca
JH
64 char *ret;
65 struct counted_string *longest;
66 int longest_i;
67
68 longest = NULL;
69 longest_i = -1;
d071d942
JT
70 for (i = 0; i < r->rewrite_nr; i++) {
71 if (!r->rewrite[i])
55029ae4 72 continue;
d071d942
JT
73 for (j = 0; j < r->rewrite[i]->instead_of_nr; j++) {
74 if (!prefixcmp(url, r->rewrite[i]->instead_of[j].s) &&
844112ca 75 (!longest ||
d071d942
JT
76 longest->len < r->rewrite[i]->instead_of[j].len)) {
77 longest = &(r->rewrite[i]->instead_of[j]);
844112ca 78 longest_i = i;
55029ae4
DB
79 }
80 }
81 }
844112ca
JH
82 if (!longest)
83 return url;
84
d071d942 85 ret = xmalloc(r->rewrite[longest_i]->baselen +
844112ca 86 (strlen(url) - longest->len) + 1);
d071d942
JT
87 strcpy(ret, r->rewrite[longest_i]->base);
88 strcpy(ret + r->rewrite[longest_i]->baselen, url + longest->len);
844112ca 89 return ret;
55029ae4
DB
90}
91
5751f490
DB
92static void add_push_refspec(struct remote *remote, const char *ref)
93{
2d31347b
DB
94 ALLOC_GROW(remote->push_refspec,
95 remote->push_refspec_nr + 1,
96 remote->push_refspec_alloc);
97 remote->push_refspec[remote->push_refspec_nr++] = ref;
5751f490
DB
98}
99
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DB
100static void add_fetch_refspec(struct remote *remote, const char *ref)
101{
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DB
102 ALLOC_GROW(remote->fetch_refspec,
103 remote->fetch_refspec_nr + 1,
104 remote->fetch_refspec_alloc);
105 remote->fetch_refspec[remote->fetch_refspec_nr++] = ref;
5d46c9d4
DB
106}
107
28b91f8a 108static void add_url(struct remote *remote, const char *url)
5751f490 109{
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DB
110 ALLOC_GROW(remote->url, remote->url_nr + 1, remote->url_alloc);
111 remote->url[remote->url_nr++] = url;
5751f490
DB
112}
113
20346234
MG
114static void add_pushurl(struct remote *remote, const char *pushurl)
115{
116 ALLOC_GROW(remote->pushurl, remote->pushurl_nr + 1, remote->pushurl_alloc);
117 remote->pushurl[remote->pushurl_nr++] = pushurl;
118}
119
1c2eafb8
JT
120static void add_pushurl_alias(struct remote *remote, const char *url)
121{
122 const char *pushurl = alias_url(url, &rewrites_push);
123 if (pushurl != url)
124 add_pushurl(remote, pushurl);
125}
126
127static void add_url_alias(struct remote *remote, const char *url)
128{
129 add_url(remote, alias_url(url, &rewrites));
130 add_pushurl_alias(remote, url);
131}
132
5751f490
DB
133static struct remote *make_remote(const char *name, int len)
134{
2d31347b
DB
135 struct remote *ret;
136 int i;
5751f490 137
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DB
138 for (i = 0; i < remotes_nr; i++) {
139 if (len ? (!strncmp(name, remotes[i]->name, len) &&
140 !remotes[i]->name[len]) :
141 !strcmp(name, remotes[i]->name))
142 return remotes[i];
5751f490
DB
143 }
144
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DB
145 ret = xcalloc(1, sizeof(struct remote));
146 ALLOC_GROW(remotes, remotes_nr + 1, remotes_alloc);
147 remotes[remotes_nr++] = ret;
5751f490 148 if (len)
2d31347b 149 ret->name = xstrndup(name, len);
5751f490 150 else
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DB
151 ret->name = xstrdup(name);
152 return ret;
5751f490
DB
153}
154
cf818348
DB
155static void add_merge(struct branch *branch, const char *name)
156{
2d31347b
DB
157 ALLOC_GROW(branch->merge_name, branch->merge_nr + 1,
158 branch->merge_alloc);
159 branch->merge_name[branch->merge_nr++] = name;
cf818348
DB
160}
161
162static struct branch *make_branch(const char *name, int len)
163{
2d31347b
DB
164 struct branch *ret;
165 int i;
cf818348
DB
166 char *refname;
167
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DB
168 for (i = 0; i < branches_nr; i++) {
169 if (len ? (!strncmp(name, branches[i]->name, len) &&
170 !branches[i]->name[len]) :
171 !strcmp(name, branches[i]->name))
172 return branches[i];
cf818348
DB
173 }
174
2d31347b
DB
175 ALLOC_GROW(branches, branches_nr + 1, branches_alloc);
176 ret = xcalloc(1, sizeof(struct branch));
177 branches[branches_nr++] = ret;
cf818348 178 if (len)
2d31347b 179 ret->name = xstrndup(name, len);
cf818348 180 else
2d31347b 181 ret->name = xstrdup(name);
e8eec71d 182 refname = xmalloc(strlen(name) + strlen("refs/heads/") + 1);
cf818348 183 strcpy(refname, "refs/heads/");
2d31347b
DB
184 strcpy(refname + strlen("refs/heads/"), ret->name);
185 ret->refname = refname;
cf818348 186
2d31347b 187 return ret;
cf818348
DB
188}
189
d071d942 190static struct rewrite *make_rewrite(struct rewrites *r, const char *base, int len)
55029ae4
DB
191{
192 struct rewrite *ret;
193 int i;
194
d071d942 195 for (i = 0; i < r->rewrite_nr; i++) {
844112ca 196 if (len
d071d942
JT
197 ? (len == r->rewrite[i]->baselen &&
198 !strncmp(base, r->rewrite[i]->base, len))
199 : !strcmp(base, r->rewrite[i]->base))
200 return r->rewrite[i];
55029ae4
DB
201 }
202
d071d942 203 ALLOC_GROW(r->rewrite, r->rewrite_nr + 1, r->rewrite_alloc);
55029ae4 204 ret = xcalloc(1, sizeof(struct rewrite));
d071d942 205 r->rewrite[r->rewrite_nr++] = ret;
844112ca 206 if (len) {
55029ae4 207 ret->base = xstrndup(base, len);
844112ca
JH
208 ret->baselen = len;
209 }
210 else {
55029ae4 211 ret->base = xstrdup(base);
844112ca
JH
212 ret->baselen = strlen(base);
213 }
55029ae4
DB
214 return ret;
215}
216
217static void add_instead_of(struct rewrite *rewrite, const char *instead_of)
218{
219 ALLOC_GROW(rewrite->instead_of, rewrite->instead_of_nr + 1, rewrite->instead_of_alloc);
844112ca
JH
220 rewrite->instead_of[rewrite->instead_of_nr].s = instead_of;
221 rewrite->instead_of[rewrite->instead_of_nr].len = strlen(instead_of);
222 rewrite->instead_of_nr++;
55029ae4
DB
223}
224
5751f490
DB
225static void read_remotes_file(struct remote *remote)
226{
227 FILE *f = fopen(git_path("remotes/%s", remote->name), "r");
228
229 if (!f)
230 return;
89cf4c70 231 remote->origin = REMOTE_REMOTES;
5751f490
DB
232 while (fgets(buffer, BUF_SIZE, f)) {
233 int value_list;
234 char *s, *p;
235
236 if (!prefixcmp(buffer, "URL:")) {
237 value_list = 0;
238 s = buffer + 4;
239 } else if (!prefixcmp(buffer, "Push:")) {
240 value_list = 1;
241 s = buffer + 5;
5d46c9d4
DB
242 } else if (!prefixcmp(buffer, "Pull:")) {
243 value_list = 2;
244 s = buffer + 5;
5751f490
DB
245 } else
246 continue;
247
248 while (isspace(*s))
249 s++;
250 if (!*s)
251 continue;
252
253 p = s + strlen(s);
254 while (isspace(p[-1]))
255 *--p = 0;
256
257 switch (value_list) {
258 case 0:
55029ae4 259 add_url_alias(remote, xstrdup(s));
5751f490
DB
260 break;
261 case 1:
262 add_push_refspec(remote, xstrdup(s));
263 break;
5d46c9d4
DB
264 case 2:
265 add_fetch_refspec(remote, xstrdup(s));
266 break;
5751f490
DB
267 }
268 }
269 fclose(f);
270}
271
272static void read_branches_file(struct remote *remote)
273{
274 const char *slash = strchr(remote->name, '/');
cf818348 275 char *frag;
f285a2d7 276 struct strbuf branch = STRBUF_INIT;
5751f490
DB
277 int n = slash ? slash - remote->name : 1000;
278 FILE *f = fopen(git_path("branches/%.*s", n, remote->name), "r");
279 char *s, *p;
280 int len;
281
282 if (!f)
283 return;
284 s = fgets(buffer, BUF_SIZE, f);
285 fclose(f);
286 if (!s)
287 return;
288 while (isspace(*s))
289 s++;
290 if (!*s)
291 return;
89cf4c70 292 remote->origin = REMOTE_BRANCHES;
5751f490
DB
293 p = s + strlen(s);
294 while (isspace(p[-1]))
295 *--p = 0;
296 len = p - s;
297 if (slash)
298 len += strlen(slash);
299 p = xmalloc(len + 1);
300 strcpy(p, s);
301 if (slash)
302 strcat(p, slash);
472fa4cd
DB
303
304 /*
305 * With "slash", e.g. "git fetch jgarzik/netdev-2.6" when
306 * reading from $GIT_DIR/branches/jgarzik fetches "HEAD" from
307 * the partial URL obtained from the branches file plus
308 * "/netdev-2.6" and does not store it in any tracking ref.
309 * #branch specifier in the file is ignored.
310 *
311 * Otherwise, the branches file would have URL and optionally
312 * #branch specified. The "master" (or specified) branch is
313 * fetched and stored in the local branch of the same name.
314 */
cf818348
DB
315 frag = strchr(p, '#');
316 if (frag) {
317 *(frag++) = '\0';
472fa4cd
DB
318 strbuf_addf(&branch, "refs/heads/%s", frag);
319 } else
320 strbuf_addstr(&branch, "refs/heads/master");
321 if (!slash) {
322 strbuf_addf(&branch, ":refs/heads/%s", remote->name);
cf818348 323 } else {
472fa4cd
DB
324 strbuf_reset(&branch);
325 strbuf_addstr(&branch, "HEAD:");
cf818348 326 }
55029ae4 327 add_url_alias(remote, p);
2af202be 328 add_fetch_refspec(remote, strbuf_detach(&branch, NULL));
18afe101
MK
329 /*
330 * Cogito compatible push: push current HEAD to remote #branch
331 * (master if missing)
332 */
333 strbuf_init(&branch, 0);
334 strbuf_addstr(&branch, "HEAD");
335 if (frag)
336 strbuf_addf(&branch, ":refs/heads/%s", frag);
337 else
338 strbuf_addstr(&branch, ":refs/heads/master");
2af202be 339 add_push_refspec(remote, strbuf_detach(&branch, NULL));
d71ab174 340 remote->fetch_tags = 1; /* always auto-follow */
5751f490
DB
341}
342
ef90d6d4 343static int handle_config(const char *key, const char *value, void *cb)
5751f490
DB
344{
345 const char *name;
346 const char *subkey;
347 struct remote *remote;
cf818348
DB
348 struct branch *branch;
349 if (!prefixcmp(key, "branch.")) {
350 name = key + 7;
351 subkey = strrchr(name, '.');
cf818348
DB
352 if (!subkey)
353 return 0;
896c0535 354 branch = make_branch(name, subkey - name);
cf818348 355 if (!strcmp(subkey, ".remote")) {
d2370cc2
JH
356 if (!value)
357 return config_error_nonbool(key);
cf818348 358 branch->remote_name = xstrdup(value);
fa685bdf 359 if (branch == current_branch) {
cf818348 360 default_remote_name = branch->remote_name;
fa685bdf
DB
361 explicit_default_remote_name = 1;
362 }
d2370cc2
JH
363 } else if (!strcmp(subkey, ".merge")) {
364 if (!value)
365 return config_error_nonbool(key);
cf818348 366 add_merge(branch, xstrdup(value));
d2370cc2 367 }
cf818348 368 return 0;
5751f490 369 }
55029ae4
DB
370 if (!prefixcmp(key, "url.")) {
371 struct rewrite *rewrite;
60e3aba9 372 name = key + 4;
55029ae4
DB
373 subkey = strrchr(name, '.');
374 if (!subkey)
375 return 0;
55029ae4 376 if (!strcmp(subkey, ".insteadof")) {
1c2eafb8
JT
377 rewrite = make_rewrite(&rewrites, name, subkey - name);
378 if (!value)
379 return config_error_nonbool(key);
380 add_instead_of(rewrite, xstrdup(value));
381 } else if (!strcmp(subkey, ".pushinsteadof")) {
382 rewrite = make_rewrite(&rewrites_push, name, subkey - name);
55029ae4
DB
383 if (!value)
384 return config_error_nonbool(key);
385 add_instead_of(rewrite, xstrdup(value));
386 }
387 }
5751f490
DB
388 if (prefixcmp(key, "remote."))
389 return 0;
390 name = key + 7;
c82efafc
BC
391 if (*name == '/') {
392 warning("Config remote shorthand cannot begin with '/': %s",
393 name);
394 return 0;
395 }
5751f490
DB
396 subkey = strrchr(name, '.');
397 if (!subkey)
cd294bc3 398 return 0;
5751f490 399 remote = make_remote(name, subkey - name);
89cf4c70 400 remote->origin = REMOTE_CONFIG;
84bb2dfd
PB
401 if (!strcmp(subkey, ".mirror"))
402 remote->mirror = git_config_bool(key, value);
403 else if (!strcmp(subkey, ".skipdefaultupdate"))
404 remote->skip_default_update = git_config_bool(key, value);
7cc91a2f
BG
405 else if (!strcmp(subkey, ".skipfetchall"))
406 remote->skip_default_update = git_config_bool(key, value);
84bb2dfd
PB
407 else if (!strcmp(subkey, ".url")) {
408 const char *v;
409 if (git_config_string(&v, key, value))
410 return -1;
411 add_url(remote, v);
20346234
MG
412 } else if (!strcmp(subkey, ".pushurl")) {
413 const char *v;
414 if (git_config_string(&v, key, value))
415 return -1;
416 add_pushurl(remote, v);
5751f490 417 } else if (!strcmp(subkey, ".push")) {
84bb2dfd
PB
418 const char *v;
419 if (git_config_string(&v, key, value))
420 return -1;
421 add_push_refspec(remote, v);
5d46c9d4 422 } else if (!strcmp(subkey, ".fetch")) {
84bb2dfd
PB
423 const char *v;
424 if (git_config_string(&v, key, value))
425 return -1;
426 add_fetch_refspec(remote, v);
5751f490 427 } else if (!strcmp(subkey, ".receivepack")) {
84bb2dfd
PB
428 const char *v;
429 if (git_config_string(&v, key, value))
430 return -1;
5751f490 431 if (!remote->receivepack)
84bb2dfd 432 remote->receivepack = v;
5751f490
DB
433 else
434 error("more than one receivepack given, using the first");
0012ba21 435 } else if (!strcmp(subkey, ".uploadpack")) {
84bb2dfd
PB
436 const char *v;
437 if (git_config_string(&v, key, value))
438 return -1;
0012ba21 439 if (!remote->uploadpack)
84bb2dfd 440 remote->uploadpack = v;
0012ba21
DB
441 else
442 error("more than one uploadpack given, using the first");
d71ab174
DB
443 } else if (!strcmp(subkey, ".tagopt")) {
444 if (!strcmp(value, "--no-tags"))
445 remote->fetch_tags = -1;
14c98218 446 } else if (!strcmp(subkey, ".proxy")) {
84bb2dfd
PB
447 return git_config_string((const char **)&remote->http_proxy,
448 key, value);
c578f51d
DB
449 } else if (!strcmp(subkey, ".vcs")) {
450 return git_config_string(&remote->foreign_vcs, key, value);
84bb2dfd 451 }
5751f490
DB
452 return 0;
453}
454
55029ae4
DB
455static void alias_all_urls(void)
456{
457 int i, j;
458 for (i = 0; i < remotes_nr; i++) {
1c2eafb8 459 int add_pushurl_aliases;
55029ae4
DB
460 if (!remotes[i])
461 continue;
20346234 462 for (j = 0; j < remotes[i]->pushurl_nr; j++) {
d071d942 463 remotes[i]->pushurl[j] = alias_url(remotes[i]->pushurl[j], &rewrites);
20346234 464 }
1c2eafb8
JT
465 add_pushurl_aliases = remotes[i]->pushurl_nr == 0;
466 for (j = 0; j < remotes[i]->url_nr; j++) {
467 if (add_pushurl_aliases)
468 add_pushurl_alias(remotes[i], remotes[i]->url[j]);
469 remotes[i]->url[j] = alias_url(remotes[i]->url[j], &rewrites);
470 }
55029ae4
DB
471 }
472}
473
5751f490
DB
474static void read_config(void)
475{
476 unsigned char sha1[20];
477 const char *head_ref;
478 int flag;
479 if (default_remote_name) // did this already
480 return;
481 default_remote_name = xstrdup("origin");
482 current_branch = NULL;
483 head_ref = resolve_ref("HEAD", sha1, 0, &flag);
484 if (head_ref && (flag & REF_ISSYMREF) &&
485 !prefixcmp(head_ref, "refs/heads/")) {
cf818348
DB
486 current_branch =
487 make_branch(head_ref + strlen("refs/heads/"), 0);
5751f490 488 }
ef90d6d4 489 git_config(handle_config, NULL);
55029ae4 490 alias_all_urls();
5751f490
DB
491}
492
47c6ef1c
JH
493/*
494 * We need to make sure the tracking branches are well formed, but a
495 * wildcard refspec in "struct refspec" must have a trailing slash. We
496 * temporarily drop the trailing '/' while calling check_ref_format(),
497 * and put it back. The caller knows that a CHECK_REF_FORMAT_ONELEVEL
498 * error return is Ok for a wildcard refspec.
499 */
500static int verify_refname(char *name, int is_glob)
501{
08fbdb30 502 int result;
47c6ef1c 503
47c6ef1c 504 result = check_ref_format(name);
08fbdb30
DB
505 if (is_glob && result == CHECK_REF_FORMAT_WILDCARD)
506 result = CHECK_REF_FORMAT_OK;
47c6ef1c
JH
507 return result;
508}
509
2cb1f36d
BC
510/*
511 * This function frees a refspec array.
512 * Warning: code paths should be checked to ensure that the src
513 * and dst pointers are always freeable pointers as well
514 * as the refspec pointer itself.
515 */
697d7f5d 516static void free_refspecs(struct refspec *refspec, int nr_refspec)
2cb1f36d
BC
517{
518 int i;
519
520 if (!refspec)
521 return;
522
523 for (i = 0; i < nr_refspec; i++) {
524 free(refspec[i].src);
525 free(refspec[i].dst);
526 }
527 free(refspec);
528}
529
24b6177e 530static struct refspec *parse_refspec_internal(int nr_refspec, const char **refspec, int fetch, int verify)
6b62816c
DB
531{
532 int i;
ef00d150 533 int st;
6b62816c 534 struct refspec *rs = xcalloc(sizeof(*rs), nr_refspec);
46220ca1 535
6b62816c 536 for (i = 0; i < nr_refspec; i++) {
47c6ef1c 537 size_t llen;
46220ca1
JH
538 int is_glob;
539 const char *lhs, *rhs;
540
8e76bf3f 541 is_glob = 0;
46220ca1
JH
542
543 lhs = refspec[i];
544 if (*lhs == '+') {
6b62816c 545 rs[i].force = 1;
46220ca1 546 lhs++;
6b62816c 547 }
46220ca1
JH
548
549 rhs = strrchr(lhs, ':');
a83619d6
PB
550
551 /*
552 * Before going on, special case ":" (or "+:") as a refspec
553 * for matching refs.
554 */
555 if (!fetch && rhs == lhs && rhs[1] == '\0') {
556 rs[i].matching = 1;
557 continue;
558 }
559
46220ca1 560 if (rhs) {
47c6ef1c 561 size_t rlen = strlen(++rhs);
abd2bde7 562 is_glob = (1 <= rlen && strchr(rhs, '*'));
08fbdb30 563 rs[i].dst = xstrndup(rhs, rlen);
6b62816c 564 }
ef00d150 565
46220ca1 566 llen = (rhs ? (rhs - lhs - 1) : strlen(lhs));
abd2bde7 567 if (1 <= llen && memchr(lhs, '*', llen)) {
7d19da46
JH
568 if ((rhs && !is_glob) || (!rhs && fetch))
569 goto invalid;
570 is_glob = 1;
7d19da46
JH
571 } else if (rhs && is_glob) {
572 goto invalid;
ef00d150 573 }
7d19da46 574
46220ca1
JH
575 rs[i].pattern = is_glob;
576 rs[i].src = xstrndup(lhs, llen);
577
578 if (fetch) {
579 /*
580 * LHS
581 * - empty is allowed; it means HEAD.
582 * - otherwise it must be a valid looking ref.
583 */
584 if (!*rs[i].src)
585 ; /* empty is ok */
586 else {
47c6ef1c 587 st = verify_refname(rs[i].src, is_glob);
46220ca1
JH
588 if (st && st != CHECK_REF_FORMAT_ONELEVEL)
589 goto invalid;
590 }
591 /*
592 * RHS
7d19da46 593 * - missing is ok, and is same as empty.
46220ca1
JH
594 * - empty is ok; it means not to store.
595 * - otherwise it must be a valid looking ref.
596 */
597 if (!rs[i].dst) {
598 ; /* ok */
599 } else if (!*rs[i].dst) {
600 ; /* ok */
601 } else {
47c6ef1c 602 st = verify_refname(rs[i].dst, is_glob);
46220ca1
JH
603 if (st && st != CHECK_REF_FORMAT_ONELEVEL)
604 goto invalid;
605 }
606 } else {
607 /*
608 * LHS
609 * - empty is allowed; it means delete.
610 * - when wildcarded, it must be a valid looking ref.
611 * - otherwise, it must be an extended SHA-1, but
612 * there is no existing way to validate this.
613 */
614 if (!*rs[i].src)
615 ; /* empty is ok */
616 else if (is_glob) {
47c6ef1c 617 st = verify_refname(rs[i].src, is_glob);
46220ca1
JH
618 if (st && st != CHECK_REF_FORMAT_ONELEVEL)
619 goto invalid;
620 }
621 else
622 ; /* anything goes, for now */
623 /*
624 * RHS
625 * - missing is allowed, but LHS then must be a
626 * valid looking ref.
627 * - empty is not allowed.
628 * - otherwise it must be a valid looking ref.
629 */
630 if (!rs[i].dst) {
47c6ef1c 631 st = verify_refname(rs[i].src, is_glob);
46220ca1
JH
632 if (st && st != CHECK_REF_FORMAT_ONELEVEL)
633 goto invalid;
634 } else if (!*rs[i].dst) {
635 goto invalid;
636 } else {
47c6ef1c 637 st = verify_refname(rs[i].dst, is_glob);
46220ca1
JH
638 if (st && st != CHECK_REF_FORMAT_ONELEVEL)
639 goto invalid;
640 }
ef00d150 641 }
6b62816c
DB
642 }
643 return rs;
46220ca1
JH
644
645 invalid:
24b6177e 646 if (verify) {
2cb1f36d
BC
647 /*
648 * nr_refspec must be greater than zero and i must be valid
649 * since it is only possible to reach this point from within
650 * the for loop above.
651 */
652 free_refspecs(rs, i+1);
24b6177e
JF
653 return NULL;
654 }
46220ca1
JH
655 die("Invalid refspec '%s'", refspec[i]);
656}
657
24b6177e
JF
658int valid_fetch_refspec(const char *fetch_refspec_str)
659{
660 const char *fetch_refspec[] = { fetch_refspec_str };
661 struct refspec *refspec;
662
663 refspec = parse_refspec_internal(1, fetch_refspec, 1, 1);
2cb1f36d 664 free_refspecs(refspec, 1);
24b6177e
JF
665 return !!refspec;
666}
667
46220ca1
JH
668struct refspec *parse_fetch_refspec(int nr_refspec, const char **refspec)
669{
24b6177e 670 return parse_refspec_internal(nr_refspec, refspec, 1, 0);
46220ca1
JH
671}
672
697d7f5d 673static struct refspec *parse_push_refspec(int nr_refspec, const char **refspec)
46220ca1 674{
24b6177e 675 return parse_refspec_internal(nr_refspec, refspec, 0, 0);
6b62816c
DB
676}
677
72ff8943
DB
678void free_refspec(int nr_refspec, struct refspec *refspec)
679{
680 int i;
681 for (i = 0; i < nr_refspec; i++) {
682 free(refspec[i].src);
683 free(refspec[i].dst);
684 }
685 free(refspec);
686}
687
df93e33c
DB
688static int valid_remote_nick(const char *name)
689{
8ca12c0d 690 if (!name[0] || is_dot_or_dotdot(name))
df93e33c
DB
691 return 0;
692 return !strchr(name, '/'); /* no slash */
693}
694
5751f490
DB
695struct remote *remote_get(const char *name)
696{
697 struct remote *ret;
fa685bdf 698 int name_given = 0;
5751f490
DB
699
700 read_config();
fa685bdf
DB
701 if (name)
702 name_given = 1;
703 else {
5751f490 704 name = default_remote_name;
fa685bdf
DB
705 name_given = explicit_default_remote_name;
706 }
9326d494 707
5751f490 708 ret = make_remote(name, 0);
df93e33c 709 if (valid_remote_nick(name)) {
0a4da29d 710 if (!valid_remote(ret))
5751f490 711 read_remotes_file(ret);
0a4da29d 712 if (!valid_remote(ret))
5751f490
DB
713 read_branches_file(ret);
714 }
0a4da29d 715 if (name_given && !valid_remote(ret))
55029ae4 716 add_url_alias(ret, name);
0a4da29d 717 if (!valid_remote(ret))
5751f490 718 return NULL;
46220ca1
JH
719 ret->fetch = parse_fetch_refspec(ret->fetch_refspec_nr, ret->fetch_refspec);
720 ret->push = parse_push_refspec(ret->push_refspec_nr, ret->push_refspec);
5751f490
DB
721 return ret;
722}
6b62816c 723
9a23ba33
FAG
724int remote_is_configured(const char *name)
725{
726 int i;
727 read_config();
728
729 for (i = 0; i < remotes_nr; i++)
730 if (!strcmp(name, remotes[i]->name))
731 return 1;
732 return 0;
733}
734
b42f6927
JS
735int for_each_remote(each_remote_fn fn, void *priv)
736{
737 int i, result = 0;
738 read_config();
2d31347b 739 for (i = 0; i < remotes_nr && !result; i++) {
b42f6927
JS
740 struct remote *r = remotes[i];
741 if (!r)
742 continue;
743 if (!r->fetch)
46220ca1
JH
744 r->fetch = parse_fetch_refspec(r->fetch_refspec_nr,
745 r->fetch_refspec);
b42f6927 746 if (!r->push)
46220ca1
JH
747 r->push = parse_push_refspec(r->push_refspec_nr,
748 r->push_refspec);
b42f6927
JS
749 result = fn(r, priv);
750 }
751 return result;
752}
753
2467a4fa
DB
754void ref_remove_duplicates(struct ref *ref_map)
755{
73cf0822
JP
756 struct string_list refs = { NULL, 0, 0, 0 };
757 struct string_list_item *item = NULL;
758 struct ref *prev = NULL, *next = NULL;
759 for (; ref_map; prev = ref_map, ref_map = next) {
760 next = ref_map->next;
2467a4fa
DB
761 if (!ref_map->peer_ref)
762 continue;
73cf0822
JP
763
764 item = string_list_lookup(ref_map->peer_ref->name, &refs);
765 if (item) {
766 if (strcmp(((struct ref *)item->util)->name,
767 ref_map->name))
768 die("%s tracks both %s and %s",
769 ref_map->peer_ref->name,
770 ((struct ref *)item->util)->name,
771 ref_map->name);
772 prev->next = ref_map->next;
773 free(ref_map->peer_ref);
774 free(ref_map);
95c96d48
JP
775 ref_map = prev; /* skip this; we freed it */
776 continue;
2467a4fa 777 }
73cf0822
JP
778
779 item = string_list_insert(ref_map->peer_ref->name, &refs);
780 item->util = ref_map;
2467a4fa 781 }
73cf0822 782 string_list_clear(&refs, 0);
2467a4fa
DB
783}
784
28b91f8a 785int remote_has_url(struct remote *remote, const char *url)
5d46c9d4
DB
786{
787 int i;
28b91f8a
SP
788 for (i = 0; i < remote->url_nr; i++) {
789 if (!strcmp(remote->url[i], url))
5d46c9d4
DB
790 return 1;
791 }
792 return 0;
793}
794
e928213f
DB
795static int match_name_with_pattern(const char *key, const char *name,
796 const char *value, char **result)
a3c84239 797{
08fbdb30
DB
798 const char *kstar = strchr(key, '*');
799 size_t klen;
abd2bde7
DB
800 size_t ksuffixlen;
801 size_t namelen;
08fbdb30
DB
802 int ret;
803 if (!kstar)
804 die("Key '%s' of pattern had no '*'", key);
805 klen = kstar - key;
abd2bde7
DB
806 ksuffixlen = strlen(kstar + 1);
807 namelen = strlen(name);
808 ret = !strncmp(name, key, klen) && namelen >= klen + ksuffixlen &&
809 !memcmp(name + namelen - ksuffixlen, kstar + 1, ksuffixlen);
e928213f 810 if (ret && value) {
08fbdb30
DB
811 const char *vstar = strchr(value, '*');
812 size_t vlen;
abd2bde7 813 size_t vsuffixlen;
08fbdb30
DB
814 if (!vstar)
815 die("Value '%s' of pattern has no '*'", value);
816 vlen = vstar - value;
abd2bde7
DB
817 vsuffixlen = strlen(vstar + 1);
818 *result = xmalloc(vlen + vsuffixlen +
e928213f 819 strlen(name) -
abd2bde7
DB
820 klen - ksuffixlen + 1);
821 strncpy(*result, value, vlen);
822 strncpy(*result + vlen,
823 name + klen, namelen - klen - ksuffixlen);
824 strcpy(*result + vlen + namelen - klen - ksuffixlen,
825 vstar + 1);
e928213f 826 }
a3c84239
DB
827 return ret;
828}
829
72ff8943
DB
830char *apply_refspecs(struct refspec *refspecs, int nr_refspec,
831 const char *name)
832{
833 int i;
834 char *ret = NULL;
835 for (i = 0; i < nr_refspec; i++) {
836 struct refspec *refspec = refspecs + i;
837 if (refspec->pattern) {
838 if (match_name_with_pattern(refspec->src, name,
839 refspec->dst, &ret))
840 return ret;
841 } else if (!strcmp(refspec->src, name))
842 return strdup(refspec->dst);
843 }
844 return NULL;
845}
846
5d46c9d4
DB
847int remote_find_tracking(struct remote *remote, struct refspec *refspec)
848{
b42f6927
JS
849 int find_src = refspec->src == NULL;
850 char *needle, **result;
5d46c9d4 851 int i;
b42f6927
JS
852
853 if (find_src) {
009c5bcd 854 if (!refspec->dst)
b42f6927
JS
855 return error("find_tracking: need either src or dst");
856 needle = refspec->dst;
857 result = &refspec->src;
858 } else {
859 needle = refspec->src;
860 result = &refspec->dst;
861 }
862
5d46c9d4
DB
863 for (i = 0; i < remote->fetch_refspec_nr; i++) {
864 struct refspec *fetch = &remote->fetch[i];
b42f6927
JS
865 const char *key = find_src ? fetch->dst : fetch->src;
866 const char *value = find_src ? fetch->src : fetch->dst;
5d46c9d4
DB
867 if (!fetch->dst)
868 continue;
869 if (fetch->pattern) {
e928213f 870 if (match_name_with_pattern(key, needle, value, result)) {
5d46c9d4
DB
871 refspec->force = fetch->force;
872 return 0;
873 }
b42f6927
JS
874 } else if (!strcmp(needle, key)) {
875 *result = xstrdup(value);
876 refspec->force = fetch->force;
877 return 0;
5d46c9d4
DB
878 }
879 }
5d46c9d4
DB
880 return -1;
881}
882
8009768e
RS
883static struct ref *alloc_ref_with_prefix(const char *prefix, size_t prefixlen,
884 const char *name)
885{
886 size_t len = strlen(name);
887 struct ref *ref = xcalloc(1, sizeof(struct ref) + prefixlen + len + 1);
888 memcpy(ref->name, prefix, prefixlen);
889 memcpy(ref->name + prefixlen, name, len);
890 return ref;
891}
892
59c69c0c 893struct ref *alloc_ref(const char *name)
dfd255dd 894{
59c69c0c 895 return alloc_ref_with_prefix("", 0, name);
737922aa
KK
896}
897
4577370e 898static struct ref *copy_ref(const struct ref *ref)
d71ab174 899{
7b3db095
JS
900 struct ref *cpy;
901 size_t len;
902 if (!ref)
903 return NULL;
904 len = strlen(ref->name);
905 cpy = xmalloc(sizeof(struct ref) + len + 1);
906 memcpy(cpy, ref, sizeof(struct ref) + len + 1);
907 cpy->next = NULL;
908 cpy->symref = ref->symref ? xstrdup(ref->symref) : NULL;
909 cpy->remote_status = ref->remote_status ? xstrdup(ref->remote_status) : NULL;
910 cpy->peer_ref = copy_ref(ref->peer_ref);
911 return cpy;
d71ab174
DB
912}
913
4577370e
DB
914struct ref *copy_ref_list(const struct ref *ref)
915{
916 struct ref *ret = NULL;
917 struct ref **tail = &ret;
918 while (ref) {
919 *tail = copy_ref(ref);
920 ref = ref->next;
921 tail = &((*tail)->next);
922 }
923 return ret;
924}
925
697d7f5d 926static void free_ref(struct ref *ref)
be885d96
DB
927{
928 if (!ref)
929 return;
7b3db095 930 free_ref(ref->peer_ref);
be885d96
DB
931 free(ref->remote_status);
932 free(ref->symref);
933 free(ref);
934}
935
dfd255dd
DB
936void free_refs(struct ref *ref)
937{
938 struct ref *next;
939 while (ref) {
940 next = ref->next;
be885d96 941 free_ref(ref);
dfd255dd
DB
942 ref = next;
943 }
944}
945
6b62816c
DB
946static int count_refspec_match(const char *pattern,
947 struct ref *refs,
948 struct ref **matched_ref)
949{
950 int patlen = strlen(pattern);
951 struct ref *matched_weak = NULL;
952 struct ref *matched = NULL;
953 int weak_match = 0;
954 int match = 0;
955
956 for (weak_match = match = 0; refs; refs = refs->next) {
957 char *name = refs->name;
958 int namelen = strlen(name);
6b62816c 959
ae36bdcf 960 if (!refname_match(pattern, name, ref_rev_parse_rules))
6b62816c
DB
961 continue;
962
963 /* A match is "weak" if it is with refs outside
964 * heads or tags, and did not specify the pattern
965 * in full (e.g. "refs/remotes/origin/master") or at
966 * least from the toplevel (e.g. "remotes/origin/master");
967 * otherwise "git push $URL master" would result in
968 * ambiguity between remotes/origin/master and heads/master
969 * at the remote site.
970 */
971 if (namelen != patlen &&
972 patlen != namelen - 5 &&
973 prefixcmp(name, "refs/heads/") &&
974 prefixcmp(name, "refs/tags/")) {
975 /* We want to catch the case where only weak
976 * matches are found and there are multiple
977 * matches, and where more than one strong
978 * matches are found, as ambiguous. One
979 * strong match with zero or more weak matches
980 * are acceptable as a unique match.
981 */
982 matched_weak = refs;
983 weak_match++;
984 }
985 else {
986 matched = refs;
987 match++;
988 }
989 }
990 if (!matched) {
991 *matched_ref = matched_weak;
992 return weak_match;
993 }
994 else {
995 *matched_ref = matched;
996 return match;
997 }
998}
999
1d735267 1000static void tail_link_ref(struct ref *ref, struct ref ***tail)
6b62816c
DB
1001{
1002 **tail = ref;
1d735267
DB
1003 while (ref->next)
1004 ref = ref->next;
6b62816c 1005 *tail = &ref->next;
6b62816c
DB
1006}
1007
1008static struct ref *try_explicit_object_name(const char *name)
1009{
1010 unsigned char sha1[20];
1011 struct ref *ref;
6b62816c
DB
1012
1013 if (!*name) {
59c69c0c 1014 ref = alloc_ref("(delete)");
6b62816c
DB
1015 hashclr(ref->new_sha1);
1016 return ref;
1017 }
1018 if (get_sha1(name, sha1))
1019 return NULL;
59c69c0c 1020 ref = alloc_ref(name);
6b62816c
DB
1021 hashcpy(ref->new_sha1, sha1);
1022 return ref;
1023}
1024
1d735267 1025static struct ref *make_linked_ref(const char *name, struct ref ***tail)
6b62816c 1026{
59c69c0c 1027 struct ref *ret = alloc_ref(name);
1d735267
DB
1028 tail_link_ref(ret, tail);
1029 return ret;
163f0ee5 1030}
8558fd9e 1031
f8aae120
JK
1032static char *guess_ref(const char *name, struct ref *peer)
1033{
1034 struct strbuf buf = STRBUF_INIT;
1035 unsigned char sha1[20];
1036
1037 const char *r = resolve_ref(peer->name, sha1, 1, NULL);
1038 if (!r)
1039 return NULL;
1040
1041 if (!prefixcmp(r, "refs/heads/"))
1042 strbuf_addstr(&buf, "refs/heads/");
1043 else if (!prefixcmp(r, "refs/tags/"))
1044 strbuf_addstr(&buf, "refs/tags/");
1045 else
1046 return NULL;
1047
1048 strbuf_addstr(&buf, name);
1049 return strbuf_detach(&buf, NULL);
1050}
1051
54a8ad92
JH
1052static int match_explicit(struct ref *src, struct ref *dst,
1053 struct ref ***dst_tail,
9a7bbd1d 1054 struct refspec *rs)
6b62816c 1055{
54a8ad92 1056 struct ref *matched_src, *matched_dst;
cdf690e5 1057 int copy_src;
8558fd9e 1058
54a8ad92 1059 const char *dst_value = rs->dst;
f8aae120 1060 char *dst_guess;
6b62816c 1061
a83619d6 1062 if (rs->pattern || rs->matching)
9a7bbd1d 1063 return 0;
8558fd9e 1064
54a8ad92
JH
1065 matched_src = matched_dst = NULL;
1066 switch (count_refspec_match(rs->src, src, &matched_src)) {
1067 case 1:
cdf690e5 1068 copy_src = 1;
54a8ad92
JH
1069 break;
1070 case 0:
1071 /* The source could be in the get_sha1() format
1072 * not a reference name. :refs/other is a
1073 * way to delete 'other' ref at the remote end.
1074 */
1075 matched_src = try_explicit_object_name(rs->src);
7dfee372 1076 if (!matched_src)
9a7bbd1d 1077 return error("src refspec %s does not match any.", rs->src);
cdf690e5 1078 copy_src = 0;
54a8ad92
JH
1079 break;
1080 default:
9a7bbd1d 1081 return error("src refspec %s matches more than one.", rs->src);
54a8ad92 1082 }
3c8b7df1 1083
4491e62a 1084 if (!dst_value) {
9f0ea7e8
DB
1085 unsigned char sha1[20];
1086 int flag;
1087
9f0ea7e8
DB
1088 dst_value = resolve_ref(matched_src->name, sha1, 1, &flag);
1089 if (!dst_value ||
1090 ((flag & REF_ISSYMREF) &&
1091 prefixcmp(dst_value, "refs/heads/")))
1092 die("%s cannot be resolved to branch.",
1093 matched_src->name);
4491e62a 1094 }
3c8b7df1 1095
54a8ad92
JH
1096 switch (count_refspec_match(dst_value, dst, &matched_dst)) {
1097 case 1:
1098 break;
1099 case 0:
163f0ee5 1100 if (!memcmp(dst_value, "refs/", 5))
1d735267 1101 matched_dst = make_linked_ref(dst_value, dst_tail);
eeefa7c9 1102 else if ((dst_guess = guess_ref(dst_value, matched_src)))
f8aae120 1103 matched_dst = make_linked_ref(dst_guess, dst_tail);
3c8b7df1 1104 else
f8aae120
JK
1105 error("unable to push to unqualified destination: %s\n"
1106 "The destination refspec neither matches an "
1107 "existing ref on the remote nor\n"
1108 "begins with refs/, and we are unable to "
1109 "guess a prefix based on the source ref.",
1110 dst_value);
54a8ad92
JH
1111 break;
1112 default:
3c8b7df1 1113 matched_dst = NULL;
54a8ad92
JH
1114 error("dst refspec %s matches more than one.",
1115 dst_value);
1116 break;
1117 }
9a7bbd1d
JK
1118 if (!matched_dst)
1119 return -1;
1120 if (matched_dst->peer_ref)
1121 return error("dst ref %s receives from more than one src.",
54a8ad92 1122 matched_dst->name);
54a8ad92 1123 else {
cdf690e5 1124 matched_dst->peer_ref = copy_src ? copy_ref(matched_src) : matched_src;
54a8ad92 1125 matched_dst->force = rs->force;
6b62816c 1126 }
9a7bbd1d 1127 return 0;
54a8ad92
JH
1128}
1129
1130static int match_explicit_refs(struct ref *src, struct ref *dst,
1131 struct ref ***dst_tail, struct refspec *rs,
1132 int rs_nr)
1133{
1134 int i, errs;
1135 for (i = errs = 0; i < rs_nr; i++)
9a7bbd1d
JK
1136 errs += match_explicit(src, dst, dst_tail, &rs[i]);
1137 return errs;
6b62816c
DB
1138}
1139
6e66bf3c
AR
1140static const struct refspec *check_pattern_match(const struct refspec *rs,
1141 int rs_nr,
1142 const struct ref *src)
8558fd9e
DB
1143{
1144 int i;
a83619d6 1145 int matching_refs = -1;
8558fd9e 1146 for (i = 0; i < rs_nr; i++) {
a83619d6
PB
1147 if (rs[i].matching &&
1148 (matching_refs == -1 || rs[i].force)) {
1149 matching_refs = i;
1150 continue;
1151 }
1152
e928213f
DB
1153 if (rs[i].pattern && match_name_with_pattern(rs[i].src, src->name,
1154 NULL, NULL))
6e66bf3c 1155 return rs + i;
8558fd9e 1156 }
a83619d6
PB
1157 if (matching_refs != -1)
1158 return rs + matching_refs;
1159 else
1160 return NULL;
8558fd9e
DB
1161}
1162
6d2bf96e
CB
1163static struct ref **tail_ref(struct ref **head)
1164{
1165 struct ref **tail = head;
1166 while (*tail)
1167 tail = &((*tail)->next);
1168 return tail;
1169}
1170
54a8ad92
JH
1171/*
1172 * Note. This is used only by "push"; refspec matching rules for
1173 * push and fetch are subtly different, so do not try to reuse it
1174 * without thinking.
1175 */
6d2bf96e 1176int match_refs(struct ref *src, struct ref **dst,
28b9d6e5 1177 int nr_refspec, const char **refspec, int flags)
6b62816c 1178{
a83619d6 1179 struct refspec *rs;
28b9d6e5
AW
1180 int send_all = flags & MATCH_REFS_ALL;
1181 int send_mirror = flags & MATCH_REFS_MIRROR;
5f48cb95 1182 int errs;
2af202be 1183 static const char *default_refspec[] = { ":", NULL };
6d2bf96e 1184 struct ref **dst_tail = tail_ref(dst);
6b62816c 1185
a83619d6
PB
1186 if (!nr_refspec) {
1187 nr_refspec = 1;
1188 refspec = default_refspec;
1189 }
1190 rs = parse_push_refspec(nr_refspec, (const char **) refspec);
6d2bf96e 1191 errs = match_explicit_refs(src, *dst, &dst_tail, rs, nr_refspec);
6b62816c
DB
1192
1193 /* pick the remainder */
1194 for ( ; src; src = src->next) {
1195 struct ref *dst_peer;
6e66bf3c
AR
1196 const struct refspec *pat = NULL;
1197 char *dst_name;
6b62816c
DB
1198 if (src->peer_ref)
1199 continue;
a83619d6
PB
1200
1201 pat = check_pattern_match(rs, nr_refspec, src);
1202 if (!pat)
1203 continue;
1204
1205 if (pat->matching) {
098e711e
JH
1206 /*
1207 * "matching refs"; traditionally we pushed everything
1208 * including refs outside refs/heads/ hierarchy, but
1209 * that does not make much sense these days.
1210 */
a83619d6
PB
1211 if (!send_mirror && prefixcmp(src->name, "refs/heads/"))
1212 continue;
1213 dst_name = xstrdup(src->name);
8558fd9e 1214
a83619d6 1215 } else {
efd8f793 1216 const char *dst_side = pat->dst ? pat->dst : pat->src;
e928213f
DB
1217 if (!match_name_with_pattern(pat->src, src->name,
1218 dst_side, &dst_name))
1219 die("Didn't think it matches any more");
a83619d6 1220 }
6d2bf96e 1221 dst_peer = find_ref_by_name(*dst, dst_name);
a83619d6
PB
1222 if (dst_peer) {
1223 if (dst_peer->peer_ref)
1224 /* We're already sending something to this ref. */
1225 goto free_name;
1226
1227 } else {
1228 if (pat->matching && !(send_all || send_mirror))
1229 /*
1230 * Remote doesn't have it, and we have no
1231 * explicit pattern, and we don't have
1232 * --all nor --mirror.
1233 */
1234 goto free_name;
28b9d6e5 1235
6b62816c 1236 /* Create a new one and link it */
6d2bf96e 1237 dst_peer = make_linked_ref(dst_name, &dst_tail);
6b62816c 1238 hashcpy(dst_peer->new_sha1, src->new_sha1);
6b62816c 1239 }
cdf690e5 1240 dst_peer->peer_ref = copy_ref(src);
a83619d6 1241 dst_peer->force = pat->force;
6e66bf3c
AR
1242 free_name:
1243 free(dst_name);
6b62816c 1244 }
5f48cb95
JS
1245 if (errs)
1246 return -1;
6b62816c
DB
1247 return 0;
1248}
cf818348
DB
1249
1250struct branch *branch_get(const char *name)
1251{
1252 struct branch *ret;
1253
1254 read_config();
1255 if (!name || !*name || !strcmp(name, "HEAD"))
1256 ret = current_branch;
1257 else
1258 ret = make_branch(name, 0);
1259 if (ret && ret->remote_name) {
1260 ret->remote = remote_get(ret->remote_name);
1261 if (ret->merge_nr) {
1262 int i;
1263 ret->merge = xcalloc(sizeof(*ret->merge),
1264 ret->merge_nr);
1265 for (i = 0; i < ret->merge_nr; i++) {
1266 ret->merge[i] = xcalloc(1, sizeof(**ret->merge));
1267 ret->merge[i]->src = xstrdup(ret->merge_name[i]);
5e6e2b48
MG
1268 if (remote_find_tracking(ret->remote, ret->merge[i])
1269 && !strcmp(ret->remote_name, "."))
1270 ret->merge[i]->dst = xstrdup(ret->merge_name[i]);
cf818348
DB
1271 }
1272 }
1273 }
1274 return ret;
1275}
1276
1277int branch_has_merge_config(struct branch *branch)
1278{
1279 return branch && !!branch->merge;
1280}
1281
85682c19
SP
1282int branch_merge_matches(struct branch *branch,
1283 int i,
1284 const char *refname)
cf818348 1285{
85682c19 1286 if (!branch || i < 0 || i >= branch->merge_nr)
cf818348 1287 return 0;
605b4978 1288 return refname_match(branch->merge[i]->src, refname, ref_fetch_rules);
cf818348 1289}
d71ab174 1290
4577370e 1291static struct ref *get_expanded_map(const struct ref *remote_refs,
d71ab174
DB
1292 const struct refspec *refspec)
1293{
4577370e 1294 const struct ref *ref;
d71ab174
DB
1295 struct ref *ret = NULL;
1296 struct ref **tail = &ret;
1297
e928213f 1298 char *expn_name;
d71ab174
DB
1299
1300 for (ref = remote_refs; ref; ref = ref->next) {
1301 if (strchr(ref->name, '^'))
1302 continue; /* a dereference item */
e928213f
DB
1303 if (match_name_with_pattern(refspec->src, ref->name,
1304 refspec->dst, &expn_name)) {
d71ab174 1305 struct ref *cpy = copy_ref(ref);
d71ab174 1306
e928213f
DB
1307 cpy->peer_ref = alloc_ref(expn_name);
1308 free(expn_name);
d71ab174
DB
1309 if (refspec->force)
1310 cpy->peer_ref->force = 1;
1311 *tail = cpy;
1312 tail = &cpy->next;
1313 }
1314 }
1315
1316 return ret;
1317}
1318
4577370e 1319static const struct ref *find_ref_by_name_abbrev(const struct ref *refs, const char *name)
d71ab174 1320{
4577370e 1321 const struct ref *ref;
d71ab174 1322 for (ref = refs; ref; ref = ref->next) {
605b4978 1323 if (refname_match(name, ref->name, ref_fetch_rules))
d71ab174
DB
1324 return ref;
1325 }
1326 return NULL;
1327}
1328
4577370e 1329struct ref *get_remote_ref(const struct ref *remote_refs, const char *name)
d71ab174 1330{
4577370e 1331 const struct ref *ref = find_ref_by_name_abbrev(remote_refs, name);
d71ab174
DB
1332
1333 if (!ref)
9ad7c5ae 1334 return NULL;
d71ab174
DB
1335
1336 return copy_ref(ref);
1337}
1338
1339static struct ref *get_local_ref(const char *name)
1340{
3eb96997 1341 if (!name || name[0] == '\0')
d71ab174
DB
1342 return NULL;
1343
59c69c0c
RS
1344 if (!prefixcmp(name, "refs/"))
1345 return alloc_ref(name);
d71ab174
DB
1346
1347 if (!prefixcmp(name, "heads/") ||
1348 !prefixcmp(name, "tags/") ||
8009768e
RS
1349 !prefixcmp(name, "remotes/"))
1350 return alloc_ref_with_prefix("refs/", 5, name);
d71ab174 1351
8009768e 1352 return alloc_ref_with_prefix("refs/heads/", 11, name);
d71ab174
DB
1353}
1354
4577370e 1355int get_fetch_map(const struct ref *remote_refs,
d71ab174 1356 const struct refspec *refspec,
9ad7c5ae
JH
1357 struct ref ***tail,
1358 int missing_ok)
d71ab174 1359{
ef00d150 1360 struct ref *ref_map, **rmp;
d71ab174
DB
1361
1362 if (refspec->pattern) {
1363 ref_map = get_expanded_map(remote_refs, refspec);
1364 } else {
9ad7c5ae
JH
1365 const char *name = refspec->src[0] ? refspec->src : "HEAD";
1366
1367 ref_map = get_remote_ref(remote_refs, name);
1368 if (!missing_ok && !ref_map)
1369 die("Couldn't find remote ref %s", name);
1370 if (ref_map) {
1371 ref_map->peer_ref = get_local_ref(refspec->dst);
1372 if (ref_map->peer_ref && refspec->force)
1373 ref_map->peer_ref->force = 1;
1374 }
d71ab174
DB
1375 }
1376
ef00d150
DB
1377 for (rmp = &ref_map; *rmp; ) {
1378 if ((*rmp)->peer_ref) {
1379 int st = check_ref_format((*rmp)->peer_ref->name + 5);
1380 if (st && st != CHECK_REF_FORMAT_ONELEVEL) {
1381 struct ref *ignore = *rmp;
1382 error("* Ignoring funny ref '%s' locally",
1383 (*rmp)->peer_ref->name);
1384 *rmp = (*rmp)->next;
1385 free(ignore->peer_ref);
1386 free(ignore);
1387 continue;
1388 }
1389 }
1390 rmp = &((*rmp)->next);
d71ab174
DB
1391 }
1392
8f70a765
AR
1393 if (ref_map)
1394 tail_link_ref(ref_map, tail);
d71ab174
DB
1395
1396 return 0;
1397}
be885d96
DB
1398
1399int resolve_remote_symref(struct ref *ref, struct ref *list)
1400{
1401 if (!ref->symref)
1402 return 0;
1403 for (; list; list = list->next)
1404 if (!strcmp(ref->symref, list->name)) {
1405 hashcpy(ref->old_sha1, list->old_sha1);
1406 return 0;
1407 }
1408 return 1;
1409}
6d21bf96 1410
ec8452d5
JS
1411static void unmark_and_free(struct commit_list *list, unsigned int mark)
1412{
1413 while (list) {
1414 struct commit_list *temp = list;
1415 temp->item->object.flags &= ~mark;
1416 list = temp->next;
1417 free(temp);
1418 }
1419}
1420
1421int ref_newer(const unsigned char *new_sha1, const unsigned char *old_sha1)
1422{
1423 struct object *o;
1424 struct commit *old, *new;
1425 struct commit_list *list, *used;
1426 int found = 0;
1427
1428 /* Both new and old must be commit-ish and new is descendant of
1429 * old. Otherwise we require --force.
1430 */
1431 o = deref_tag(parse_object(old_sha1), NULL, 0);
1432 if (!o || o->type != OBJ_COMMIT)
1433 return 0;
1434 old = (struct commit *) o;
1435
1436 o = deref_tag(parse_object(new_sha1), NULL, 0);
1437 if (!o || o->type != OBJ_COMMIT)
1438 return 0;
1439 new = (struct commit *) o;
1440
1441 if (parse_commit(new) < 0)
1442 return 0;
1443
1444 used = list = NULL;
1445 commit_list_insert(new, &list);
1446 while (list) {
1447 new = pop_most_recent_commit(&list, TMP_MARK);
1448 commit_list_insert(new, &used);
1449 if (new == old) {
1450 found = 1;
1451 break;
1452 }
1453 }
1454 unmark_and_free(list, TMP_MARK);
1455 unmark_and_free(used, TMP_MARK);
1456 return found;
1457}
1458
6d21bf96
JH
1459/*
1460 * Return true if there is anything to report, otherwise false.
1461 */
1462int stat_tracking_info(struct branch *branch, int *num_ours, int *num_theirs)
1463{
1464 unsigned char sha1[20];
1465 struct commit *ours, *theirs;
1466 char symmetric[84];
1467 struct rev_info revs;
1468 const char *rev_argv[10], *base;
1469 int rev_argc;
1470
1471 /*
1472 * Nothing to report unless we are marked to build on top of
1473 * somebody else.
1474 */
1475 if (!branch ||
1476 !branch->merge || !branch->merge[0] || !branch->merge[0]->dst)
1477 return 0;
1478
1479 /*
1480 * If what we used to build on no longer exists, there is
1481 * nothing to report.
1482 */
1483 base = branch->merge[0]->dst;
1484 if (!resolve_ref(base, sha1, 1, NULL))
1485 return 0;
57ffc5f8 1486 theirs = lookup_commit_reference(sha1);
6d21bf96
JH
1487 if (!theirs)
1488 return 0;
1489
1490 if (!resolve_ref(branch->refname, sha1, 1, NULL))
1491 return 0;
57ffc5f8 1492 ours = lookup_commit_reference(sha1);
6d21bf96
JH
1493 if (!ours)
1494 return 0;
1495
1496 /* are we the same? */
1497 if (theirs == ours)
1498 return 0;
1499
8fbf879e 1500 /* Run "rev-list --left-right ours...theirs" internally... */
6d21bf96
JH
1501 rev_argc = 0;
1502 rev_argv[rev_argc++] = NULL;
1503 rev_argv[rev_argc++] = "--left-right";
1504 rev_argv[rev_argc++] = symmetric;
1505 rev_argv[rev_argc++] = "--";
1506 rev_argv[rev_argc] = NULL;
1507
1508 strcpy(symmetric, sha1_to_hex(ours->object.sha1));
1509 strcpy(symmetric + 40, "...");
1510 strcpy(symmetric + 43, sha1_to_hex(theirs->object.sha1));
1511
1512 init_revisions(&revs, NULL);
1513 setup_revisions(rev_argc, rev_argv, &revs, NULL);
1514 prepare_revision_walk(&revs);
1515
1516 /* ... and count the commits on each side. */
1517 *num_ours = 0;
1518 *num_theirs = 0;
1519 while (1) {
1520 struct commit *c = get_revision(&revs);
1521 if (!c)
1522 break;
1523 if (c->object.flags & SYMMETRIC_LEFT)
1524 (*num_ours)++;
1525 else
1526 (*num_theirs)++;
1527 }
c0234b2e
JH
1528
1529 /* clear object flags smudged by the above traversal */
1530 clear_commit_marks(ours, ALL_REV_FLAGS);
1531 clear_commit_marks(theirs, ALL_REV_FLAGS);
6d21bf96
JH
1532 return 1;
1533}
1534
1535/*
1536 * Return true when there is anything to report, otherwise false.
1537 */
1538int format_tracking_info(struct branch *branch, struct strbuf *sb)
1539{
1540 int num_ours, num_theirs;
4de53ce0 1541 const char *base;
6d21bf96
JH
1542
1543 if (!stat_tracking_info(branch, &num_ours, &num_theirs))
1544 return 0;
1545
1546 base = branch->merge[0]->dst;
45972ffb 1547 base = shorten_unambiguous_ref(base, 0);
6d21bf96 1548 if (!num_theirs)
4de53ce0 1549 strbuf_addf(sb, "Your branch is ahead of '%s' "
6d21bf96 1550 "by %d commit%s.\n",
4de53ce0 1551 base, num_ours, (num_ours == 1) ? "" : "s");
6d21bf96 1552 else if (!num_ours)
4de53ce0
AP
1553 strbuf_addf(sb, "Your branch is behind '%s' "
1554 "by %d commit%s, "
6d21bf96 1555 "and can be fast-forwarded.\n",
4de53ce0 1556 base, num_theirs, (num_theirs == 1) ? "" : "s");
6d21bf96 1557 else
4de53ce0
AP
1558 strbuf_addf(sb, "Your branch and '%s' have diverged,\n"
1559 "and have %d and %d different commit(s) each, "
1560 "respectively.\n",
1561 base, num_ours, num_theirs);
6d21bf96
JH
1562 return 1;
1563}
454e2025
JS
1564
1565static int one_local_ref(const char *refname, const unsigned char *sha1, int flag, void *cb_data)
1566{
1567 struct ref ***local_tail = cb_data;
1568 struct ref *ref;
1569 int len;
1570
1571 /* we already know it starts with refs/ to get here */
1572 if (check_ref_format(refname + 5))
1573 return 0;
1574
1575 len = strlen(refname) + 1;
1576 ref = xcalloc(1, sizeof(*ref) + len);
1577 hashcpy(ref->new_sha1, sha1);
1578 memcpy(ref->name, refname, len);
1579 **local_tail = ref;
1580 *local_tail = &ref->next;
1581 return 0;
1582}
1583
1584struct ref *get_local_heads(void)
1585{
55f0566f 1586 struct ref *local_refs = NULL, **local_tail = &local_refs;
454e2025
JS
1587 for_each_ref(one_local_ref, &local_tail);
1588 return local_refs;
1589}
8ef51733 1590
4229f1fa
JS
1591struct ref *guess_remote_head(const struct ref *head,
1592 const struct ref *refs,
1593 int all)
8ef51733 1594{
8ef51733 1595 const struct ref *r;
4229f1fa
JS
1596 struct ref *list = NULL;
1597 struct ref **tail = &list;
8ef51733 1598
6cb4e6cc 1599 if (!head)
8ef51733
JS
1600 return NULL;
1601
fbb074c2
JK
1602 /*
1603 * Some transports support directly peeking at
1604 * where HEAD points; if that is the case, then
1605 * we don't have to guess.
1606 */
1607 if (head->symref)
1608 return copy_ref(find_ref_by_name(refs, head->symref));
1609
8ef51733 1610 /* If refs/heads/master could be right, it is. */
4229f1fa
JS
1611 if (!all) {
1612 r = find_ref_by_name(refs, "refs/heads/master");
1613 if (r && !hashcmp(r->old_sha1, head->old_sha1))
1614 return copy_ref(r);
1615 }
8ef51733
JS
1616
1617 /* Look for another ref that points there */
4229f1fa
JS
1618 for (r = refs; r; r = r->next) {
1619 if (r != head && !hashcmp(r->old_sha1, head->old_sha1)) {
1620 *tail = copy_ref(r);
1621 tail = &((*tail)->next);
1622 if (!all)
1623 break;
1624 }
1625 }
8ef51733 1626
4229f1fa 1627 return list;
8ef51733 1628}
f2ef6075
JS
1629
1630struct stale_heads_info {
1631 struct remote *remote;
1632 struct string_list *ref_names;
1633 struct ref **stale_refs_tail;
1634};
1635
1636static int get_stale_heads_cb(const char *refname,
1637 const unsigned char *sha1, int flags, void *cb_data)
1638{
1639 struct stale_heads_info *info = cb_data;
1640 struct refspec refspec;
1641 memset(&refspec, 0, sizeof(refspec));
1642 refspec.dst = (char *)refname;
1643 if (!remote_find_tracking(info->remote, &refspec)) {
1644 if (!((flags & REF_ISSYMREF) ||
1645 string_list_has_string(info->ref_names, refspec.src))) {
1646 struct ref *ref = make_linked_ref(refname, &info->stale_refs_tail);
1647 hashcpy(ref->new_sha1, sha1);
1648 }
1649 }
1650 return 0;
1651}
1652
1653struct ref *get_stale_heads(struct remote *remote, struct ref *fetch_map)
1654{
1655 struct ref *ref, *stale_refs = NULL;
1656 struct string_list ref_names = { NULL, 0, 0, 0 };
1657 struct stale_heads_info info;
1658 info.remote = remote;
1659 info.ref_names = &ref_names;
1660 info.stale_refs_tail = &stale_refs;
1661 for (ref = fetch_map; ref; ref = ref->next)
1662 string_list_append(ref->name, &ref_names);
1663 sort_string_list(&ref_names);
1664 for_each_ref(get_stale_heads_cb, &info);
1665 string_list_clear(&ref_names, 0);
1666 return stale_refs;
1667}