Git 1.8.4-rc3
[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"
ed81c76b 10#include "mergesort.h"
5751f490 11
6ddba5e2
FC
12enum map_direction { FROM_SRC, FROM_DST };
13
e0aaa29f
DB
14static struct refspec s_tag_refspec = {
15 0,
16 1,
b84c343c 17 0,
6e7b66ee 18 0,
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DB
19 "refs/tags/*",
20 "refs/tags/*"
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DB
21};
22
23const struct refspec *tag_refspec = &s_tag_refspec;
24
844112ca
JH
25struct counted_string {
26 size_t len;
27 const char *s;
28};
55029ae4
DB
29struct rewrite {
30 const char *base;
844112ca
JH
31 size_t baselen;
32 struct counted_string *instead_of;
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DB
33 int instead_of_nr;
34 int instead_of_alloc;
35};
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JT
36struct rewrites {
37 struct rewrite **rewrite;
38 int rewrite_alloc;
39 int rewrite_nr;
40};
55029ae4 41
5751f490 42static struct remote **remotes;
2d31347b
DB
43static int remotes_alloc;
44static int remotes_nr;
5751f490 45
cf818348 46static struct branch **branches;
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DB
47static int branches_alloc;
48static int branches_nr;
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DB
49
50static struct branch *current_branch;
51static const char *default_remote_name;
f24f715e 52static const char *pushremote_name;
fa685bdf 53static int explicit_default_remote_name;
cf818348 54
d071d942 55static struct rewrites rewrites;
1c2eafb8 56static struct rewrites rewrites_push;
55029ae4 57
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DB
58#define BUF_SIZE (2048)
59static char buffer[BUF_SIZE];
60
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DB
61static int valid_remote(const struct remote *remote)
62{
c578f51d 63 return (!!remote->url) || (!!remote->foreign_vcs);
0a4da29d
DB
64}
65
d071d942 66static const char *alias_url(const char *url, struct rewrites *r)
55029ae4
DB
67{
68 int i, j;
844112ca
JH
69 char *ret;
70 struct counted_string *longest;
71 int longest_i;
72
73 longest = NULL;
74 longest_i = -1;
d071d942
JT
75 for (i = 0; i < r->rewrite_nr; i++) {
76 if (!r->rewrite[i])
55029ae4 77 continue;
d071d942
JT
78 for (j = 0; j < r->rewrite[i]->instead_of_nr; j++) {
79 if (!prefixcmp(url, r->rewrite[i]->instead_of[j].s) &&
844112ca 80 (!longest ||
d071d942
JT
81 longest->len < r->rewrite[i]->instead_of[j].len)) {
82 longest = &(r->rewrite[i]->instead_of[j]);
844112ca 83 longest_i = i;
55029ae4
DB
84 }
85 }
86 }
844112ca
JH
87 if (!longest)
88 return url;
89
d071d942 90 ret = xmalloc(r->rewrite[longest_i]->baselen +
844112ca 91 (strlen(url) - longest->len) + 1);
d071d942
JT
92 strcpy(ret, r->rewrite[longest_i]->base);
93 strcpy(ret + r->rewrite[longest_i]->baselen, url + longest->len);
844112ca 94 return ret;
55029ae4
DB
95}
96
5751f490
DB
97static void add_push_refspec(struct remote *remote, const char *ref)
98{
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DB
99 ALLOC_GROW(remote->push_refspec,
100 remote->push_refspec_nr + 1,
101 remote->push_refspec_alloc);
102 remote->push_refspec[remote->push_refspec_nr++] = ref;
5751f490
DB
103}
104
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DB
105static void add_fetch_refspec(struct remote *remote, const char *ref)
106{
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DB
107 ALLOC_GROW(remote->fetch_refspec,
108 remote->fetch_refspec_nr + 1,
109 remote->fetch_refspec_alloc);
110 remote->fetch_refspec[remote->fetch_refspec_nr++] = ref;
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DB
111}
112
28b91f8a 113static void add_url(struct remote *remote, const char *url)
5751f490 114{
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DB
115 ALLOC_GROW(remote->url, remote->url_nr + 1, remote->url_alloc);
116 remote->url[remote->url_nr++] = url;
5751f490
DB
117}
118
20346234
MG
119static void add_pushurl(struct remote *remote, const char *pushurl)
120{
121 ALLOC_GROW(remote->pushurl, remote->pushurl_nr + 1, remote->pushurl_alloc);
122 remote->pushurl[remote->pushurl_nr++] = pushurl;
123}
124
1c2eafb8
JT
125static void add_pushurl_alias(struct remote *remote, const char *url)
126{
127 const char *pushurl = alias_url(url, &rewrites_push);
128 if (pushurl != url)
129 add_pushurl(remote, pushurl);
130}
131
132static void add_url_alias(struct remote *remote, const char *url)
133{
134 add_url(remote, alias_url(url, &rewrites));
135 add_pushurl_alias(remote, url);
136}
137
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DB
138static struct remote *make_remote(const char *name, int len)
139{
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DB
140 struct remote *ret;
141 int i;
5751f490 142
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DB
143 for (i = 0; i < remotes_nr; i++) {
144 if (len ? (!strncmp(name, remotes[i]->name, len) &&
145 !remotes[i]->name[len]) :
146 !strcmp(name, remotes[i]->name))
147 return remotes[i];
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DB
148 }
149
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DB
150 ret = xcalloc(1, sizeof(struct remote));
151 ALLOC_GROW(remotes, remotes_nr + 1, remotes_alloc);
152 remotes[remotes_nr++] = ret;
5751f490 153 if (len)
2d31347b 154 ret->name = xstrndup(name, len);
5751f490 155 else
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DB
156 ret->name = xstrdup(name);
157 return ret;
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DB
158}
159
cf818348
DB
160static void add_merge(struct branch *branch, const char *name)
161{
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DB
162 ALLOC_GROW(branch->merge_name, branch->merge_nr + 1,
163 branch->merge_alloc);
164 branch->merge_name[branch->merge_nr++] = name;
cf818348
DB
165}
166
167static struct branch *make_branch(const char *name, int len)
168{
2d31347b
DB
169 struct branch *ret;
170 int i;
cf818348
DB
171 char *refname;
172
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DB
173 for (i = 0; i < branches_nr; i++) {
174 if (len ? (!strncmp(name, branches[i]->name, len) &&
175 !branches[i]->name[len]) :
176 !strcmp(name, branches[i]->name))
177 return branches[i];
cf818348
DB
178 }
179
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DB
180 ALLOC_GROW(branches, branches_nr + 1, branches_alloc);
181 ret = xcalloc(1, sizeof(struct branch));
182 branches[branches_nr++] = ret;
cf818348 183 if (len)
2d31347b 184 ret->name = xstrndup(name, len);
cf818348 185 else
2d31347b 186 ret->name = xstrdup(name);
e8eec71d 187 refname = xmalloc(strlen(name) + strlen("refs/heads/") + 1);
cf818348 188 strcpy(refname, "refs/heads/");
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DB
189 strcpy(refname + strlen("refs/heads/"), ret->name);
190 ret->refname = refname;
cf818348 191
2d31347b 192 return ret;
cf818348
DB
193}
194
d071d942 195static struct rewrite *make_rewrite(struct rewrites *r, const char *base, int len)
55029ae4
DB
196{
197 struct rewrite *ret;
198 int i;
199
d071d942 200 for (i = 0; i < r->rewrite_nr; i++) {
844112ca 201 if (len
d071d942
JT
202 ? (len == r->rewrite[i]->baselen &&
203 !strncmp(base, r->rewrite[i]->base, len))
204 : !strcmp(base, r->rewrite[i]->base))
205 return r->rewrite[i];
55029ae4
DB
206 }
207
d071d942 208 ALLOC_GROW(r->rewrite, r->rewrite_nr + 1, r->rewrite_alloc);
55029ae4 209 ret = xcalloc(1, sizeof(struct rewrite));
d071d942 210 r->rewrite[r->rewrite_nr++] = ret;
844112ca 211 if (len) {
55029ae4 212 ret->base = xstrndup(base, len);
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JH
213 ret->baselen = len;
214 }
215 else {
55029ae4 216 ret->base = xstrdup(base);
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JH
217 ret->baselen = strlen(base);
218 }
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DB
219 return ret;
220}
221
222static void add_instead_of(struct rewrite *rewrite, const char *instead_of)
223{
224 ALLOC_GROW(rewrite->instead_of, rewrite->instead_of_nr + 1, rewrite->instead_of_alloc);
844112ca
JH
225 rewrite->instead_of[rewrite->instead_of_nr].s = instead_of;
226 rewrite->instead_of[rewrite->instead_of_nr].len = strlen(instead_of);
227 rewrite->instead_of_nr++;
55029ae4
DB
228}
229
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DB
230static void read_remotes_file(struct remote *remote)
231{
232 FILE *f = fopen(git_path("remotes/%s", remote->name), "r");
233
234 if (!f)
235 return;
89cf4c70 236 remote->origin = REMOTE_REMOTES;
5751f490
DB
237 while (fgets(buffer, BUF_SIZE, f)) {
238 int value_list;
239 char *s, *p;
240
241 if (!prefixcmp(buffer, "URL:")) {
242 value_list = 0;
243 s = buffer + 4;
244 } else if (!prefixcmp(buffer, "Push:")) {
245 value_list = 1;
246 s = buffer + 5;
5d46c9d4
DB
247 } else if (!prefixcmp(buffer, "Pull:")) {
248 value_list = 2;
249 s = buffer + 5;
5751f490
DB
250 } else
251 continue;
252
253 while (isspace(*s))
254 s++;
255 if (!*s)
256 continue;
257
258 p = s + strlen(s);
259 while (isspace(p[-1]))
260 *--p = 0;
261
262 switch (value_list) {
263 case 0:
55029ae4 264 add_url_alias(remote, xstrdup(s));
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DB
265 break;
266 case 1:
267 add_push_refspec(remote, xstrdup(s));
268 break;
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DB
269 case 2:
270 add_fetch_refspec(remote, xstrdup(s));
271 break;
5751f490
DB
272 }
273 }
274 fclose(f);
275}
276
277static void read_branches_file(struct remote *remote)
278{
cf818348 279 char *frag;
f285a2d7 280 struct strbuf branch = STRBUF_INIT;
55cfde25 281 int n = 1000;
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DB
282 FILE *f = fopen(git_path("branches/%.*s", n, remote->name), "r");
283 char *s, *p;
284 int len;
285
286 if (!f)
287 return;
288 s = fgets(buffer, BUF_SIZE, f);
289 fclose(f);
290 if (!s)
291 return;
292 while (isspace(*s))
293 s++;
294 if (!*s)
295 return;
89cf4c70 296 remote->origin = REMOTE_BRANCHES;
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DB
297 p = s + strlen(s);
298 while (isspace(p[-1]))
299 *--p = 0;
300 len = p - s;
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DB
301 p = xmalloc(len + 1);
302 strcpy(p, s);
472fa4cd
DB
303
304 /*
55cfde25 305 * The branches file would have URL and optionally
472fa4cd
DB
306 * #branch specified. The "master" (or specified) branch is
307 * fetched and stored in the local branch of the same name.
308 */
cf818348
DB
309 frag = strchr(p, '#');
310 if (frag) {
311 *(frag++) = '\0';
472fa4cd
DB
312 strbuf_addf(&branch, "refs/heads/%s", frag);
313 } else
314 strbuf_addstr(&branch, "refs/heads/master");
55cfde25
RR
315
316 strbuf_addf(&branch, ":refs/heads/%s", remote->name);
55029ae4 317 add_url_alias(remote, p);
2af202be 318 add_fetch_refspec(remote, strbuf_detach(&branch, NULL));
18afe101
MK
319 /*
320 * Cogito compatible push: push current HEAD to remote #branch
321 * (master if missing)
322 */
323 strbuf_init(&branch, 0);
324 strbuf_addstr(&branch, "HEAD");
325 if (frag)
326 strbuf_addf(&branch, ":refs/heads/%s", frag);
327 else
328 strbuf_addstr(&branch, ":refs/heads/master");
2af202be 329 add_push_refspec(remote, strbuf_detach(&branch, NULL));
d71ab174 330 remote->fetch_tags = 1; /* always auto-follow */
5751f490
DB
331}
332
ef90d6d4 333static int handle_config(const char *key, const char *value, void *cb)
5751f490
DB
334{
335 const char *name;
336 const char *subkey;
337 struct remote *remote;
cf818348
DB
338 struct branch *branch;
339 if (!prefixcmp(key, "branch.")) {
340 name = key + 7;
341 subkey = strrchr(name, '.');
cf818348
DB
342 if (!subkey)
343 return 0;
896c0535 344 branch = make_branch(name, subkey - name);
cf818348 345 if (!strcmp(subkey, ".remote")) {
b4b63435
RR
346 if (git_config_string(&branch->remote_name, key, value))
347 return -1;
fa685bdf 348 if (branch == current_branch) {
cf818348 349 default_remote_name = branch->remote_name;
fa685bdf
DB
350 explicit_default_remote_name = 1;
351 }
9f765ce6
RR
352 } else if (!strcmp(subkey, ".pushremote")) {
353 if (branch == current_branch)
354 if (git_config_string(&pushremote_name, key, value))
355 return -1;
d2370cc2
JH
356 } else if (!strcmp(subkey, ".merge")) {
357 if (!value)
358 return config_error_nonbool(key);
cf818348 359 add_merge(branch, xstrdup(value));
d2370cc2 360 }
cf818348 361 return 0;
5751f490 362 }
55029ae4
DB
363 if (!prefixcmp(key, "url.")) {
364 struct rewrite *rewrite;
60e3aba9 365 name = key + 4;
55029ae4
DB
366 subkey = strrchr(name, '.');
367 if (!subkey)
368 return 0;
55029ae4 369 if (!strcmp(subkey, ".insteadof")) {
1c2eafb8
JT
370 rewrite = make_rewrite(&rewrites, name, subkey - name);
371 if (!value)
372 return config_error_nonbool(key);
373 add_instead_of(rewrite, xstrdup(value));
374 } else if (!strcmp(subkey, ".pushinsteadof")) {
375 rewrite = make_rewrite(&rewrites_push, name, subkey - name);
55029ae4
DB
376 if (!value)
377 return config_error_nonbool(key);
378 add_instead_of(rewrite, xstrdup(value));
379 }
380 }
224c2171 381
5751f490
DB
382 if (prefixcmp(key, "remote."))
383 return 0;
384 name = key + 7;
224c2171
RR
385
386 /* Handle remote.* variables */
387 if (!strcmp(name, "pushdefault"))
388 return git_config_string(&pushremote_name, key, value);
389
390 /* Handle remote.<name>.* variables */
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;
944163a4
ST
446 else if (!strcmp(value, "--tags"))
447 remote->fetch_tags = 2;
14c98218 448 } else if (!strcmp(subkey, ".proxy")) {
84bb2dfd
PB
449 return git_config_string((const char **)&remote->http_proxy,
450 key, value);
c578f51d
DB
451 } else if (!strcmp(subkey, ".vcs")) {
452 return git_config_string(&remote->foreign_vcs, key, value);
84bb2dfd 453 }
5751f490
DB
454 return 0;
455}
456
55029ae4
DB
457static void alias_all_urls(void)
458{
459 int i, j;
460 for (i = 0; i < remotes_nr; i++) {
1c2eafb8 461 int add_pushurl_aliases;
55029ae4
DB
462 if (!remotes[i])
463 continue;
20346234 464 for (j = 0; j < remotes[i]->pushurl_nr; j++) {
d071d942 465 remotes[i]->pushurl[j] = alias_url(remotes[i]->pushurl[j], &rewrites);
20346234 466 }
1c2eafb8
JT
467 add_pushurl_aliases = remotes[i]->pushurl_nr == 0;
468 for (j = 0; j < remotes[i]->url_nr; j++) {
469 if (add_pushurl_aliases)
470 add_pushurl_alias(remotes[i], remotes[i]->url[j]);
471 remotes[i]->url[j] = alias_url(remotes[i]->url[j], &rewrites);
472 }
55029ae4
DB
473 }
474}
475
5751f490
DB
476static void read_config(void)
477{
478 unsigned char sha1[20];
479 const char *head_ref;
480 int flag;
2543d9b6 481 if (default_remote_name) /* did this already */
5751f490
DB
482 return;
483 default_remote_name = xstrdup("origin");
484 current_branch = NULL;
8cad4744 485 head_ref = resolve_ref_unsafe("HEAD", sha1, 0, &flag);
5751f490
DB
486 if (head_ref && (flag & REF_ISSYMREF) &&
487 !prefixcmp(head_ref, "refs/heads/")) {
cf818348
DB
488 current_branch =
489 make_branch(head_ref + strlen("refs/heads/"), 0);
5751f490 490 }
ef90d6d4 491 git_config(handle_config, NULL);
55029ae4 492 alias_all_urls();
5751f490
DB
493}
494
2cb1f36d
BC
495/*
496 * This function frees a refspec array.
497 * Warning: code paths should be checked to ensure that the src
498 * and dst pointers are always freeable pointers as well
499 * as the refspec pointer itself.
500 */
697d7f5d 501static void free_refspecs(struct refspec *refspec, int nr_refspec)
2cb1f36d
BC
502{
503 int i;
504
505 if (!refspec)
506 return;
507
508 for (i = 0; i < nr_refspec; i++) {
509 free(refspec[i].src);
510 free(refspec[i].dst);
511 }
512 free(refspec);
513}
514
24b6177e 515static struct refspec *parse_refspec_internal(int nr_refspec, const char **refspec, int fetch, int verify)
6b62816c
DB
516{
517 int i;
518 struct refspec *rs = xcalloc(sizeof(*rs), nr_refspec);
46220ca1 519
6b62816c 520 for (i = 0; i < nr_refspec; i++) {
47c6ef1c 521 size_t llen;
46220ca1
JH
522 int is_glob;
523 const char *lhs, *rhs;
8d9c5010 524 int flags;
46220ca1 525
8e76bf3f 526 is_glob = 0;
46220ca1
JH
527
528 lhs = refspec[i];
529 if (*lhs == '+') {
6b62816c 530 rs[i].force = 1;
46220ca1 531 lhs++;
6b62816c 532 }
46220ca1
JH
533
534 rhs = strrchr(lhs, ':');
a83619d6
PB
535
536 /*
537 * Before going on, special case ":" (or "+:") as a refspec
def24991 538 * for pushing matching refs.
a83619d6
PB
539 */
540 if (!fetch && rhs == lhs && rhs[1] == '\0') {
541 rs[i].matching = 1;
542 continue;
543 }
544
46220ca1 545 if (rhs) {
47c6ef1c 546 size_t rlen = strlen(++rhs);
abd2bde7 547 is_glob = (1 <= rlen && strchr(rhs, '*'));
08fbdb30 548 rs[i].dst = xstrndup(rhs, rlen);
6b62816c 549 }
ef00d150 550
46220ca1 551 llen = (rhs ? (rhs - lhs - 1) : strlen(lhs));
abd2bde7 552 if (1 <= llen && memchr(lhs, '*', llen)) {
7d19da46
JH
553 if ((rhs && !is_glob) || (!rhs && fetch))
554 goto invalid;
555 is_glob = 1;
7d19da46
JH
556 } else if (rhs && is_glob) {
557 goto invalid;
ef00d150 558 }
7d19da46 559
46220ca1
JH
560 rs[i].pattern = is_glob;
561 rs[i].src = xstrndup(lhs, llen);
8d9c5010 562 flags = REFNAME_ALLOW_ONELEVEL | (is_glob ? REFNAME_REFSPEC_PATTERN : 0);
46220ca1
JH
563
564 if (fetch) {
6e7b66ee
JH
565 unsigned char unused[40];
566
def24991 567 /* LHS */
46220ca1 568 if (!*rs[i].src)
def24991 569 ; /* empty is ok; it means "HEAD" */
6e7b66ee
JH
570 else if (llen == 40 && !get_sha1_hex(rs[i].src, unused))
571 rs[i].exact_sha1 = 1; /* ok */
def24991
JH
572 else if (!check_refname_format(rs[i].src, flags))
573 ; /* valid looking ref is ok */
574 else
8d9c5010 575 goto invalid;
def24991 576 /* RHS */
8d9c5010 577 if (!rs[i].dst)
def24991 578 ; /* missing is ok; it is the same as empty */
8d9c5010 579 else if (!*rs[i].dst)
def24991
JH
580 ; /* empty is ok; it means "do not store" */
581 else if (!check_refname_format(rs[i].dst, flags))
582 ; /* valid looking ref is ok */
583 else
8d9c5010 584 goto invalid;
46220ca1
JH
585 } else {
586 /*
587 * LHS
588 * - empty is allowed; it means delete.
589 * - when wildcarded, it must be a valid looking ref.
590 * - otherwise, it must be an extended SHA-1, but
591 * there is no existing way to validate this.
592 */
593 if (!*rs[i].src)
594 ; /* empty is ok */
595 else if (is_glob) {
8d9c5010 596 if (check_refname_format(rs[i].src, flags))
46220ca1
JH
597 goto invalid;
598 }
599 else
600 ; /* anything goes, for now */
601 /*
602 * RHS
603 * - missing is allowed, but LHS then must be a
604 * valid looking ref.
605 * - empty is not allowed.
606 * - otherwise it must be a valid looking ref.
607 */
608 if (!rs[i].dst) {
8d9c5010 609 if (check_refname_format(rs[i].src, flags))
46220ca1
JH
610 goto invalid;
611 } else if (!*rs[i].dst) {
612 goto invalid;
613 } else {
8d9c5010 614 if (check_refname_format(rs[i].dst, flags))
46220ca1
JH
615 goto invalid;
616 }
ef00d150 617 }
6b62816c
DB
618 }
619 return rs;
46220ca1
JH
620
621 invalid:
24b6177e 622 if (verify) {
2cb1f36d
BC
623 /*
624 * nr_refspec must be greater than zero and i must be valid
625 * since it is only possible to reach this point from within
626 * the for loop above.
627 */
628 free_refspecs(rs, i+1);
24b6177e
JF
629 return NULL;
630 }
46220ca1
JH
631 die("Invalid refspec '%s'", refspec[i]);
632}
633
24b6177e
JF
634int valid_fetch_refspec(const char *fetch_refspec_str)
635{
24b6177e
JF
636 struct refspec *refspec;
637
66dbfd55 638 refspec = parse_refspec_internal(1, &fetch_refspec_str, 1, 1);
2cb1f36d 639 free_refspecs(refspec, 1);
24b6177e
JF
640 return !!refspec;
641}
642
46220ca1
JH
643struct refspec *parse_fetch_refspec(int nr_refspec, const char **refspec)
644{
24b6177e 645 return parse_refspec_internal(nr_refspec, refspec, 1, 0);
46220ca1
JH
646}
647
697d7f5d 648static struct refspec *parse_push_refspec(int nr_refspec, const char **refspec)
46220ca1 649{
24b6177e 650 return parse_refspec_internal(nr_refspec, refspec, 0, 0);
6b62816c
DB
651}
652
72ff8943
DB
653void free_refspec(int nr_refspec, struct refspec *refspec)
654{
655 int i;
656 for (i = 0; i < nr_refspec; i++) {
657 free(refspec[i].src);
658 free(refspec[i].dst);
659 }
660 free(refspec);
661}
662
df93e33c
DB
663static int valid_remote_nick(const char *name)
664{
8ca12c0d 665 if (!name[0] || is_dot_or_dotdot(name))
df93e33c
DB
666 return 0;
667 return !strchr(name, '/'); /* no slash */
668}
669
f24f715e 670static struct remote *remote_get_1(const char *name, const char *pushremote_name)
5751f490
DB
671{
672 struct remote *ret;
fa685bdf 673 int name_given = 0;
5751f490 674
fa685bdf
DB
675 if (name)
676 name_given = 1;
677 else {
f24f715e
RR
678 if (pushremote_name) {
679 name = pushremote_name;
680 name_given = 1;
681 } else {
682 name = default_remote_name;
683 name_given = explicit_default_remote_name;
684 }
fa685bdf 685 }
9326d494 686
5751f490 687 ret = make_remote(name, 0);
df93e33c 688 if (valid_remote_nick(name)) {
0a4da29d 689 if (!valid_remote(ret))
5751f490 690 read_remotes_file(ret);
0a4da29d 691 if (!valid_remote(ret))
5751f490
DB
692 read_branches_file(ret);
693 }
0a4da29d 694 if (name_given && !valid_remote(ret))
55029ae4 695 add_url_alias(ret, name);
0a4da29d 696 if (!valid_remote(ret))
5751f490 697 return NULL;
46220ca1
JH
698 ret->fetch = parse_fetch_refspec(ret->fetch_refspec_nr, ret->fetch_refspec);
699 ret->push = parse_push_refspec(ret->push_refspec_nr, ret->push_refspec);
5751f490
DB
700 return ret;
701}
6b62816c 702
f24f715e
RR
703struct remote *remote_get(const char *name)
704{
705 read_config();
706 return remote_get_1(name, NULL);
707}
708
709struct remote *pushremote_get(const char *name)
710{
711 read_config();
712 return remote_get_1(name, pushremote_name);
713}
714
9a23ba33
FAG
715int remote_is_configured(const char *name)
716{
717 int i;
718 read_config();
719
720 for (i = 0; i < remotes_nr; i++)
721 if (!strcmp(name, remotes[i]->name))
722 return 1;
723 return 0;
724}
725
b42f6927
JS
726int for_each_remote(each_remote_fn fn, void *priv)
727{
728 int i, result = 0;
729 read_config();
2d31347b 730 for (i = 0; i < remotes_nr && !result; i++) {
b42f6927
JS
731 struct remote *r = remotes[i];
732 if (!r)
733 continue;
734 if (!r->fetch)
46220ca1
JH
735 r->fetch = parse_fetch_refspec(r->fetch_refspec_nr,
736 r->fetch_refspec);
b42f6927 737 if (!r->push)
46220ca1
JH
738 r->push = parse_push_refspec(r->push_refspec_nr,
739 r->push_refspec);
b42f6927
JS
740 result = fn(r, priv);
741 }
742 return result;
743}
744
2467a4fa
DB
745void ref_remove_duplicates(struct ref *ref_map)
746{
183113a5 747 struct string_list refs = STRING_LIST_INIT_NODUP;
73cf0822
JP
748 struct string_list_item *item = NULL;
749 struct ref *prev = NULL, *next = NULL;
750 for (; ref_map; prev = ref_map, ref_map = next) {
751 next = ref_map->next;
2467a4fa
DB
752 if (!ref_map->peer_ref)
753 continue;
73cf0822 754
e8c8b713 755 item = string_list_lookup(&refs, ref_map->peer_ref->name);
73cf0822
JP
756 if (item) {
757 if (strcmp(((struct ref *)item->util)->name,
758 ref_map->name))
759 die("%s tracks both %s and %s",
760 ref_map->peer_ref->name,
761 ((struct ref *)item->util)->name,
762 ref_map->name);
763 prev->next = ref_map->next;
764 free(ref_map->peer_ref);
765 free(ref_map);
95c96d48
JP
766 ref_map = prev; /* skip this; we freed it */
767 continue;
2467a4fa 768 }
73cf0822 769
78a395d3 770 item = string_list_insert(&refs, ref_map->peer_ref->name);
73cf0822 771 item->util = ref_map;
2467a4fa 772 }
73cf0822 773 string_list_clear(&refs, 0);
2467a4fa
DB
774}
775
28b91f8a 776int remote_has_url(struct remote *remote, const char *url)
5d46c9d4
DB
777{
778 int i;
28b91f8a
SP
779 for (i = 0; i < remote->url_nr; i++) {
780 if (!strcmp(remote->url[i], url))
5d46c9d4
DB
781 return 1;
782 }
783 return 0;
784}
785
e928213f
DB
786static int match_name_with_pattern(const char *key, const char *name,
787 const char *value, char **result)
a3c84239 788{
08fbdb30
DB
789 const char *kstar = strchr(key, '*');
790 size_t klen;
abd2bde7
DB
791 size_t ksuffixlen;
792 size_t namelen;
08fbdb30
DB
793 int ret;
794 if (!kstar)
795 die("Key '%s' of pattern had no '*'", key);
796 klen = kstar - key;
abd2bde7
DB
797 ksuffixlen = strlen(kstar + 1);
798 namelen = strlen(name);
799 ret = !strncmp(name, key, klen) && namelen >= klen + ksuffixlen &&
800 !memcmp(name + namelen - ksuffixlen, kstar + 1, ksuffixlen);
e928213f 801 if (ret && value) {
08fbdb30
DB
802 const char *vstar = strchr(value, '*');
803 size_t vlen;
abd2bde7 804 size_t vsuffixlen;
08fbdb30
DB
805 if (!vstar)
806 die("Value '%s' of pattern has no '*'", value);
807 vlen = vstar - value;
abd2bde7
DB
808 vsuffixlen = strlen(vstar + 1);
809 *result = xmalloc(vlen + vsuffixlen +
e928213f 810 strlen(name) -
abd2bde7
DB
811 klen - ksuffixlen + 1);
812 strncpy(*result, value, vlen);
813 strncpy(*result + vlen,
814 name + klen, namelen - klen - ksuffixlen);
815 strcpy(*result + vlen + namelen - klen - ksuffixlen,
816 vstar + 1);
e928213f 817 }
a3c84239
DB
818 return ret;
819}
820
c500352e 821static int query_refspecs(struct refspec *refs, int ref_count, struct refspec *query)
72ff8943
DB
822{
823 int i;
c500352e 824 int find_src = !query->src;
72ff8943 825
c500352e
CMN
826 if (find_src && !query->dst)
827 return error("query_refspecs: need either src or dst");
b42f6927 828
c500352e
CMN
829 for (i = 0; i < ref_count; i++) {
830 struct refspec *refspec = &refs[i];
831 const char *key = find_src ? refspec->dst : refspec->src;
832 const char *value = find_src ? refspec->src : refspec->dst;
833 const char *needle = find_src ? query->dst : query->src;
834 char **result = find_src ? &query->src : &query->dst;
b42f6927 835
c500352e 836 if (!refspec->dst)
5d46c9d4 837 continue;
c500352e 838 if (refspec->pattern) {
e928213f 839 if (match_name_with_pattern(key, needle, value, result)) {
c500352e 840 query->force = refspec->force;
5d46c9d4
DB
841 return 0;
842 }
b42f6927
JS
843 } else if (!strcmp(needle, key)) {
844 *result = xstrdup(value);
c500352e 845 query->force = refspec->force;
b42f6927 846 return 0;
5d46c9d4
DB
847 }
848 }
5d46c9d4
DB
849 return -1;
850}
851
c500352e
CMN
852char *apply_refspecs(struct refspec *refspecs, int nr_refspec,
853 const char *name)
854{
855 struct refspec query;
856
857 memset(&query, 0, sizeof(struct refspec));
858 query.src = (char *)name;
859
860 if (query_refspecs(refspecs, nr_refspec, &query))
861 return NULL;
862
863 return query.dst;
864}
865
866int remote_find_tracking(struct remote *remote, struct refspec *refspec)
867{
868 return query_refspecs(remote->fetch, remote->fetch_refspec_nr, refspec);
869}
870
8009768e
RS
871static struct ref *alloc_ref_with_prefix(const char *prefix, size_t prefixlen,
872 const char *name)
873{
874 size_t len = strlen(name);
875 struct ref *ref = xcalloc(1, sizeof(struct ref) + prefixlen + len + 1);
876 memcpy(ref->name, prefix, prefixlen);
877 memcpy(ref->name + prefixlen, name, len);
878 return ref;
879}
880
59c69c0c 881struct ref *alloc_ref(const char *name)
dfd255dd 882{
59c69c0c 883 return alloc_ref_with_prefix("", 0, name);
737922aa
KK
884}
885
59a57757 886struct ref *copy_ref(const struct ref *ref)
d71ab174 887{
7b3db095
JS
888 struct ref *cpy;
889 size_t len;
890 if (!ref)
891 return NULL;
892 len = strlen(ref->name);
893 cpy = xmalloc(sizeof(struct ref) + len + 1);
894 memcpy(cpy, ref, sizeof(struct ref) + len + 1);
895 cpy->next = NULL;
896 cpy->symref = ref->symref ? xstrdup(ref->symref) : NULL;
897 cpy->remote_status = ref->remote_status ? xstrdup(ref->remote_status) : NULL;
898 cpy->peer_ref = copy_ref(ref->peer_ref);
899 return cpy;
d71ab174
DB
900}
901
4577370e
DB
902struct ref *copy_ref_list(const struct ref *ref)
903{
904 struct ref *ret = NULL;
905 struct ref **tail = &ret;
906 while (ref) {
907 *tail = copy_ref(ref);
908 ref = ref->next;
909 tail = &((*tail)->next);
910 }
911 return ret;
912}
913
697d7f5d 914static void free_ref(struct ref *ref)
be885d96
DB
915{
916 if (!ref)
917 return;
7b3db095 918 free_ref(ref->peer_ref);
be885d96
DB
919 free(ref->remote_status);
920 free(ref->symref);
921 free(ref);
922}
923
dfd255dd
DB
924void free_refs(struct ref *ref)
925{
926 struct ref *next;
927 while (ref) {
928 next = ref->next;
be885d96 929 free_ref(ref);
dfd255dd
DB
930 ref = next;
931 }
932}
933
ed81c76b
JK
934int ref_compare_name(const void *va, const void *vb)
935{
936 const struct ref *a = va, *b = vb;
937 return strcmp(a->name, b->name);
938}
939
940static void *ref_list_get_next(const void *a)
941{
942 return ((const struct ref *)a)->next;
943}
944
945static void ref_list_set_next(void *a, void *next)
946{
947 ((struct ref *)a)->next = next;
948}
949
950void sort_ref_list(struct ref **l, int (*cmp)(const void *, const void *))
951{
952 *l = llist_mergesort(*l, ref_list_get_next, ref_list_set_next, cmp);
953}
954
6b62816c
DB
955static int count_refspec_match(const char *pattern,
956 struct ref *refs,
957 struct ref **matched_ref)
958{
959 int patlen = strlen(pattern);
960 struct ref *matched_weak = NULL;
961 struct ref *matched = NULL;
962 int weak_match = 0;
963 int match = 0;
964
965 for (weak_match = match = 0; refs; refs = refs->next) {
966 char *name = refs->name;
967 int namelen = strlen(name);
6b62816c 968
ae36bdcf 969 if (!refname_match(pattern, name, ref_rev_parse_rules))
6b62816c
DB
970 continue;
971
972 /* A match is "weak" if it is with refs outside
973 * heads or tags, and did not specify the pattern
974 * in full (e.g. "refs/remotes/origin/master") or at
975 * least from the toplevel (e.g. "remotes/origin/master");
976 * otherwise "git push $URL master" would result in
977 * ambiguity between remotes/origin/master and heads/master
978 * at the remote site.
979 */
980 if (namelen != patlen &&
981 patlen != namelen - 5 &&
982 prefixcmp(name, "refs/heads/") &&
983 prefixcmp(name, "refs/tags/")) {
984 /* We want to catch the case where only weak
985 * matches are found and there are multiple
986 * matches, and where more than one strong
987 * matches are found, as ambiguous. One
988 * strong match with zero or more weak matches
989 * are acceptable as a unique match.
990 */
991 matched_weak = refs;
992 weak_match++;
993 }
994 else {
995 matched = refs;
996 match++;
997 }
998 }
999 if (!matched) {
1000 *matched_ref = matched_weak;
1001 return weak_match;
1002 }
1003 else {
1004 *matched_ref = matched;
1005 return match;
1006 }
1007}
1008
1d735267 1009static void tail_link_ref(struct ref *ref, struct ref ***tail)
6b62816c
DB
1010{
1011 **tail = ref;
1d735267
DB
1012 while (ref->next)
1013 ref = ref->next;
6b62816c 1014 *tail = &ref->next;
6b62816c
DB
1015}
1016
67655246
FC
1017static struct ref *alloc_delete_ref(void)
1018{
1019 struct ref *ref = alloc_ref("(delete)");
1020 hashclr(ref->new_sha1);
1021 return ref;
1022}
1023
6b62816c
DB
1024static struct ref *try_explicit_object_name(const char *name)
1025{
1026 unsigned char sha1[20];
1027 struct ref *ref;
6b62816c 1028
67655246
FC
1029 if (!*name)
1030 return alloc_delete_ref();
6b62816c
DB
1031 if (get_sha1(name, sha1))
1032 return NULL;
59c69c0c 1033 ref = alloc_ref(name);
6b62816c
DB
1034 hashcpy(ref->new_sha1, sha1);
1035 return ref;
1036}
1037
1d735267 1038static struct ref *make_linked_ref(const char *name, struct ref ***tail)
6b62816c 1039{
59c69c0c 1040 struct ref *ret = alloc_ref(name);
1d735267
DB
1041 tail_link_ref(ret, tail);
1042 return ret;
163f0ee5 1043}
8558fd9e 1044
f8aae120
JK
1045static char *guess_ref(const char *name, struct ref *peer)
1046{
1047 struct strbuf buf = STRBUF_INIT;
1048 unsigned char sha1[20];
1049
8cad4744 1050 const char *r = resolve_ref_unsafe(peer->name, sha1, 1, NULL);
f8aae120
JK
1051 if (!r)
1052 return NULL;
1053
1054 if (!prefixcmp(r, "refs/heads/"))
1055 strbuf_addstr(&buf, "refs/heads/");
1056 else if (!prefixcmp(r, "refs/tags/"))
1057 strbuf_addstr(&buf, "refs/tags/");
1058 else
1059 return NULL;
1060
1061 strbuf_addstr(&buf, name);
1062 return strbuf_detach(&buf, NULL);
1063}
1064
54a8ad92
JH
1065static int match_explicit(struct ref *src, struct ref *dst,
1066 struct ref ***dst_tail,
9a7bbd1d 1067 struct refspec *rs)
6b62816c 1068{
54a8ad92 1069 struct ref *matched_src, *matched_dst;
cdf690e5 1070 int copy_src;
8558fd9e 1071
54a8ad92 1072 const char *dst_value = rs->dst;
f8aae120 1073 char *dst_guess;
6b62816c 1074
a83619d6 1075 if (rs->pattern || rs->matching)
9a7bbd1d 1076 return 0;
8558fd9e 1077
54a8ad92
JH
1078 matched_src = matched_dst = NULL;
1079 switch (count_refspec_match(rs->src, src, &matched_src)) {
1080 case 1:
cdf690e5 1081 copy_src = 1;
54a8ad92
JH
1082 break;
1083 case 0:
1084 /* The source could be in the get_sha1() format
1085 * not a reference name. :refs/other is a
1086 * way to delete 'other' ref at the remote end.
1087 */
1088 matched_src = try_explicit_object_name(rs->src);
7dfee372 1089 if (!matched_src)
9a7bbd1d 1090 return error("src refspec %s does not match any.", rs->src);
cdf690e5 1091 copy_src = 0;
54a8ad92
JH
1092 break;
1093 default:
9a7bbd1d 1094 return error("src refspec %s matches more than one.", rs->src);
54a8ad92 1095 }
3c8b7df1 1096
4491e62a 1097 if (!dst_value) {
9f0ea7e8
DB
1098 unsigned char sha1[20];
1099 int flag;
1100
8cad4744 1101 dst_value = resolve_ref_unsafe(matched_src->name, sha1, 1, &flag);
9f0ea7e8
DB
1102 if (!dst_value ||
1103 ((flag & REF_ISSYMREF) &&
1104 prefixcmp(dst_value, "refs/heads/")))
1105 die("%s cannot be resolved to branch.",
1106 matched_src->name);
4491e62a 1107 }
3c8b7df1 1108
54a8ad92
JH
1109 switch (count_refspec_match(dst_value, dst, &matched_dst)) {
1110 case 1:
1111 break;
1112 case 0:
163f0ee5 1113 if (!memcmp(dst_value, "refs/", 5))
1d735267 1114 matched_dst = make_linked_ref(dst_value, dst_tail);
5742c82b
JK
1115 else if (is_null_sha1(matched_src->new_sha1))
1116 error("unable to delete '%s': remote ref does not exist",
1117 dst_value);
eeefa7c9 1118 else if ((dst_guess = guess_ref(dst_value, matched_src)))
f8aae120 1119 matched_dst = make_linked_ref(dst_guess, dst_tail);
3c8b7df1 1120 else
f8aae120
JK
1121 error("unable to push to unqualified destination: %s\n"
1122 "The destination refspec neither matches an "
1123 "existing ref on the remote nor\n"
1124 "begins with refs/, and we are unable to "
1125 "guess a prefix based on the source ref.",
1126 dst_value);
54a8ad92
JH
1127 break;
1128 default:
3c8b7df1 1129 matched_dst = NULL;
54a8ad92
JH
1130 error("dst refspec %s matches more than one.",
1131 dst_value);
1132 break;
1133 }
9a7bbd1d
JK
1134 if (!matched_dst)
1135 return -1;
1136 if (matched_dst->peer_ref)
1137 return error("dst ref %s receives from more than one src.",
54a8ad92 1138 matched_dst->name);
54a8ad92 1139 else {
cdf690e5 1140 matched_dst->peer_ref = copy_src ? copy_ref(matched_src) : matched_src;
54a8ad92 1141 matched_dst->force = rs->force;
6b62816c 1142 }
9a7bbd1d 1143 return 0;
54a8ad92
JH
1144}
1145
1146static int match_explicit_refs(struct ref *src, struct ref *dst,
1147 struct ref ***dst_tail, struct refspec *rs,
1148 int rs_nr)
1149{
1150 int i, errs;
1151 for (i = errs = 0; i < rs_nr; i++)
9a7bbd1d
JK
1152 errs += match_explicit(src, dst, dst_tail, &rs[i]);
1153 return errs;
6b62816c
DB
1154}
1155
db70a04c 1156static char *get_ref_match(const struct refspec *rs, int rs_nr, const struct ref *ref,
6ddba5e2 1157 int send_mirror, int direction, const struct refspec **ret_pat)
8558fd9e 1158{
db70a04c
FC
1159 const struct refspec *pat;
1160 char *name;
8558fd9e 1161 int i;
a83619d6 1162 int matching_refs = -1;
8558fd9e 1163 for (i = 0; i < rs_nr; i++) {
a83619d6
PB
1164 if (rs[i].matching &&
1165 (matching_refs == -1 || rs[i].force)) {
1166 matching_refs = i;
1167 continue;
1168 }
1169
db70a04c
FC
1170 if (rs[i].pattern) {
1171 const char *dst_side = rs[i].dst ? rs[i].dst : rs[i].src;
6ddba5e2
FC
1172 int match;
1173 if (direction == FROM_SRC)
1174 match = match_name_with_pattern(rs[i].src, ref->name, dst_side, &name);
1175 else
1176 match = match_name_with_pattern(dst_side, ref->name, rs[i].src, &name);
1177 if (match) {
db70a04c
FC
1178 matching_refs = i;
1179 break;
1180 }
1181 }
8558fd9e 1182 }
db70a04c 1183 if (matching_refs == -1)
a83619d6 1184 return NULL;
db70a04c
FC
1185
1186 pat = rs + matching_refs;
1187 if (pat->matching) {
1188 /*
1189 * "matching refs"; traditionally we pushed everything
1190 * including refs outside refs/heads/ hierarchy, but
1191 * that does not make much sense these days.
1192 */
1193 if (!send_mirror && prefixcmp(ref->name, "refs/heads/"))
1194 return NULL;
1195 name = xstrdup(ref->name);
1196 }
1197 if (ret_pat)
1198 *ret_pat = pat;
1199 return name;
8558fd9e
DB
1200}
1201
6d2bf96e
CB
1202static struct ref **tail_ref(struct ref **head)
1203{
1204 struct ref **tail = head;
1205 while (*tail)
1206 tail = &((*tail)->next);
1207 return tail;
1208}
1209
c2aba155
JH
1210struct tips {
1211 struct commit **tip;
1212 int nr, alloc;
1213};
1214
1215static void add_to_tips(struct tips *tips, const unsigned char *sha1)
1216{
1217 struct commit *commit;
1218
1219 if (is_null_sha1(sha1))
1220 return;
1221 commit = lookup_commit_reference_gently(sha1, 1);
1222 if (!commit || (commit->object.flags & TMP_MARK))
1223 return;
1224 commit->object.flags |= TMP_MARK;
1225 ALLOC_GROW(tips->tip, tips->nr + 1, tips->alloc);
1226 tips->tip[tips->nr++] = commit;
1227}
1228
1229static void add_missing_tags(struct ref *src, struct ref **dst, struct ref ***dst_tail)
1230{
1231 struct string_list dst_tag = STRING_LIST_INIT_NODUP;
1232 struct string_list src_tag = STRING_LIST_INIT_NODUP;
1233 struct string_list_item *item;
1234 struct ref *ref;
1235 struct tips sent_tips;
1236
1237 /*
1238 * Collect everything we know they would have at the end of
1239 * this push, and collect all tags they have.
1240 */
1241 memset(&sent_tips, 0, sizeof(sent_tips));
1242 for (ref = *dst; ref; ref = ref->next) {
1243 if (ref->peer_ref &&
1244 !is_null_sha1(ref->peer_ref->new_sha1))
1245 add_to_tips(&sent_tips, ref->peer_ref->new_sha1);
1246 else
1247 add_to_tips(&sent_tips, ref->old_sha1);
1248 if (!prefixcmp(ref->name, "refs/tags/"))
1249 string_list_append(&dst_tag, ref->name);
1250 }
1251 clear_commit_marks_many(sent_tips.nr, sent_tips.tip, TMP_MARK);
1252
1253 sort_string_list(&dst_tag);
1254
1255 /* Collect tags they do not have. */
1256 for (ref = src; ref; ref = ref->next) {
1257 if (prefixcmp(ref->name, "refs/tags/"))
1258 continue; /* not a tag */
1259 if (string_list_has_string(&dst_tag, ref->name))
1260 continue; /* they already have it */
1261 if (sha1_object_info(ref->new_sha1, NULL) != OBJ_TAG)
1262 continue; /* be conservative */
1263 item = string_list_append(&src_tag, ref->name);
1264 item->util = ref;
1265 }
1266 string_list_clear(&dst_tag, 0);
1267
1268 /*
1269 * At this point, src_tag lists tags that are missing from
1270 * dst, and sent_tips lists the tips we are pushing or those
1271 * that we know they already have. An element in the src_tag
1272 * that is an ancestor of any of the sent_tips needs to be
1273 * sent to the other side.
1274 */
1275 if (sent_tips.nr) {
1276 for_each_string_list_item(item, &src_tag) {
1277 struct ref *ref = item->util;
1278 struct ref *dst_ref;
1279 struct commit *commit;
1280
1281 if (is_null_sha1(ref->new_sha1))
1282 continue;
1283 commit = lookup_commit_reference_gently(ref->new_sha1, 1);
1284 if (!commit)
1285 /* not pushing a commit, which is not an error */
1286 continue;
1287
1288 /*
1289 * Is this tag, which they do not have, reachable from
1290 * any of the commits we are sending?
1291 */
1292 if (!in_merge_bases_many(commit, sent_tips.nr, sent_tips.tip))
1293 continue;
1294
1295 /* Add it in */
1296 dst_ref = make_linked_ref(ref->name, dst_tail);
1297 hashcpy(dst_ref->new_sha1, ref->new_sha1);
1298 dst_ref->peer_ref = copy_ref(ref);
1299 }
1300 }
1301 string_list_clear(&src_tag, 0);
1302 free(sent_tips.tip);
1303}
1304
f1bd15ab
BC
1305static void prepare_ref_index(struct string_list *ref_index, struct ref *ref)
1306{
1307 for ( ; ref; ref = ref->next)
1308 string_list_append_nodup(ref_index, ref->name)->util = ref;
1309
1310 sort_string_list(ref_index);
1311}
1312
54a8ad92 1313/*
29753cdd
JH
1314 * Given the set of refs the local repository has, the set of refs the
1315 * remote repository has, and the refspec used for push, determine
1316 * what remote refs we will update and with what value by setting
1317 * peer_ref (which object is being pushed) and force (if the push is
1318 * forced) in elements of "dst". The function may add new elements to
1319 * dst (e.g. pushing to a new branch, done in match_explicit_refs).
54a8ad92 1320 */
29753cdd
JH
1321int match_push_refs(struct ref *src, struct ref **dst,
1322 int nr_refspec, const char **refspec, int flags)
6b62816c 1323{
a83619d6 1324 struct refspec *rs;
28b9d6e5
AW
1325 int send_all = flags & MATCH_REFS_ALL;
1326 int send_mirror = flags & MATCH_REFS_MIRROR;
6ddba5e2 1327 int send_prune = flags & MATCH_REFS_PRUNE;
5f48cb95 1328 int errs;
2af202be 1329 static const char *default_refspec[] = { ":", NULL };
b1d8b1f3 1330 struct ref *ref, **dst_tail = tail_ref(dst);
f1bd15ab 1331 struct string_list dst_ref_index = STRING_LIST_INIT_NODUP;
6b62816c 1332
a83619d6
PB
1333 if (!nr_refspec) {
1334 nr_refspec = 1;
1335 refspec = default_refspec;
1336 }
1337 rs = parse_push_refspec(nr_refspec, (const char **) refspec);
6d2bf96e 1338 errs = match_explicit_refs(src, *dst, &dst_tail, rs, nr_refspec);
6b62816c
DB
1339
1340 /* pick the remainder */
b1d8b1f3 1341 for (ref = src; ref; ref = ref->next) {
f1bd15ab 1342 struct string_list_item *dst_item;
6b62816c 1343 struct ref *dst_peer;
6e66bf3c
AR
1344 const struct refspec *pat = NULL;
1345 char *dst_name;
db70a04c 1346
6ddba5e2 1347 dst_name = get_ref_match(rs, nr_refspec, ref, send_mirror, FROM_SRC, &pat);
db70a04c 1348 if (!dst_name)
a83619d6
PB
1349 continue;
1350
f1bd15ab
BC
1351 if (!dst_ref_index.nr)
1352 prepare_ref_index(&dst_ref_index, *dst);
1353
1354 dst_item = string_list_lookup(&dst_ref_index, dst_name);
1355 dst_peer = dst_item ? dst_item->util : NULL;
a83619d6
PB
1356 if (dst_peer) {
1357 if (dst_peer->peer_ref)
1358 /* We're already sending something to this ref. */
1359 goto free_name;
a83619d6
PB
1360 } else {
1361 if (pat->matching && !(send_all || send_mirror))
1362 /*
1363 * Remote doesn't have it, and we have no
1364 * explicit pattern, and we don't have
1365 * --all nor --mirror.
1366 */
1367 goto free_name;
28b9d6e5 1368
6b62816c 1369 /* Create a new one and link it */
6d2bf96e 1370 dst_peer = make_linked_ref(dst_name, &dst_tail);
b1d8b1f3 1371 hashcpy(dst_peer->new_sha1, ref->new_sha1);
f1bd15ab
BC
1372 string_list_insert(&dst_ref_index,
1373 dst_peer->name)->util = dst_peer;
6b62816c 1374 }
b1d8b1f3 1375 dst_peer->peer_ref = copy_ref(ref);
a83619d6 1376 dst_peer->force = pat->force;
6e66bf3c
AR
1377 free_name:
1378 free(dst_name);
6b62816c 1379 }
c2aba155 1380
f1bd15ab
BC
1381 string_list_clear(&dst_ref_index, 0);
1382
c2aba155
JH
1383 if (flags & MATCH_REFS_FOLLOW_TAGS)
1384 add_missing_tags(src, dst, &dst_tail);
1385
6ddba5e2 1386 if (send_prune) {
f1bd15ab 1387 struct string_list src_ref_index = STRING_LIST_INIT_NODUP;
6ddba5e2
FC
1388 /* check for missing refs on the remote */
1389 for (ref = *dst; ref; ref = ref->next) {
1390 char *src_name;
1391
1392 if (ref->peer_ref)
1393 /* We're already sending something to this ref. */
1394 continue;
1395
1396 src_name = get_ref_match(rs, nr_refspec, ref, send_mirror, FROM_DST, NULL);
1397 if (src_name) {
f1bd15ab
BC
1398 if (!src_ref_index.nr)
1399 prepare_ref_index(&src_ref_index, src);
1400 if (!string_list_has_string(&src_ref_index,
1401 src_name))
6ddba5e2
FC
1402 ref->peer_ref = alloc_delete_ref();
1403 free(src_name);
1404 }
1405 }
f1bd15ab 1406 string_list_clear(&src_ref_index, 0);
6ddba5e2 1407 }
5f48cb95
JS
1408 if (errs)
1409 return -1;
6b62816c
DB
1410 return 0;
1411}
cf818348 1412
20e8b465
TRC
1413void set_ref_status_for_push(struct ref *remote_refs, int send_mirror,
1414 int force_update)
1415{
1416 struct ref *ref;
1417
1418 for (ref = remote_refs; ref; ref = ref->next) {
8c5f6f71
CR
1419 int force_ref_update = ref->force || force_update;
1420
20e8b465
TRC
1421 if (ref->peer_ref)
1422 hashcpy(ref->new_sha1, ref->peer_ref->new_sha1);
1423 else if (!send_mirror)
1424 continue;
1425
1426 ref->deletion = is_null_sha1(ref->new_sha1);
1427 if (!ref->deletion &&
1428 !hashcmp(ref->old_sha1, ref->new_sha1)) {
1429 ref->status = REF_STATUS_UPTODATE;
1430 continue;
1431 }
1432
a272b289 1433 /*
256b9d70
JH
1434 * Decide whether an individual refspec A:B can be
1435 * pushed. The push will succeed if any of the
1436 * following are true:
20e8b465 1437 *
a272b289 1438 * (1) the remote reference B does not exist
20e8b465 1439 *
a272b289
CR
1440 * (2) the remote reference B is being removed (i.e.,
1441 * pushing :B where no source is specified)
20e8b465 1442 *
256b9d70
JH
1443 * (3) the destination is not under refs/tags/, and
1444 * if the old and new value is a commit, the new
1445 * is a descendant of the old.
20e8b465 1446 *
a272b289
CR
1447 * (4) it is forced using the +A:B notation, or by
1448 * passing the --force argument
20e8b465
TRC
1449 */
1450
5ece083f 1451 if (!ref->deletion && !is_null_sha1(ref->old_sha1)) {
0f4d498d
JH
1452 int why = 0; /* why would this push require --force? */
1453
1454 if (!prefixcmp(ref->name, "refs/tags/"))
1455 why = REF_STATUS_REJECT_ALREADY_EXISTS;
75e5c0dc
JH
1456 else if (!has_sha1_file(ref->old_sha1))
1457 why = REF_STATUS_REJECT_FETCH_FIRST;
1458 else if (!lookup_commit_reference_gently(ref->old_sha1, 1) ||
1459 !lookup_commit_reference_gently(ref->new_sha1, 1))
1460 why = REF_STATUS_REJECT_NEEDS_FORCE;
1461 else if (!ref_newer(ref->new_sha1, ref->old_sha1))
0f4d498d
JH
1462 why = REF_STATUS_REJECT_NONFASTFORWARD;
1463
1464 if (!force_ref_update)
1465 ref->status = why;
1466 else if (why)
5ece083f 1467 ref->forced_update = 1;
20e8b465
TRC
1468 }
1469 }
1470}
1471
cf818348
DB
1472struct branch *branch_get(const char *name)
1473{
1474 struct branch *ret;
1475
1476 read_config();
1477 if (!name || !*name || !strcmp(name, "HEAD"))
1478 ret = current_branch;
1479 else
1480 ret = make_branch(name, 0);
1481 if (ret && ret->remote_name) {
1482 ret->remote = remote_get(ret->remote_name);
1483 if (ret->merge_nr) {
1484 int i;
7a97ee1d 1485 ret->merge = xcalloc(ret->merge_nr, sizeof(*ret->merge));
cf818348
DB
1486 for (i = 0; i < ret->merge_nr; i++) {
1487 ret->merge[i] = xcalloc(1, sizeof(**ret->merge));
1488 ret->merge[i]->src = xstrdup(ret->merge_name[i]);
5e6e2b48
MG
1489 if (remote_find_tracking(ret->remote, ret->merge[i])
1490 && !strcmp(ret->remote_name, "."))
1491 ret->merge[i]->dst = xstrdup(ret->merge_name[i]);
cf818348
DB
1492 }
1493 }
1494 }
1495 return ret;
1496}
1497
1498int branch_has_merge_config(struct branch *branch)
1499{
1500 return branch && !!branch->merge;
1501}
1502
85682c19
SP
1503int branch_merge_matches(struct branch *branch,
1504 int i,
1505 const char *refname)
cf818348 1506{
85682c19 1507 if (!branch || i < 0 || i >= branch->merge_nr)
cf818348 1508 return 0;
605b4978 1509 return refname_match(branch->merge[i]->src, refname, ref_fetch_rules);
cf818348 1510}
d71ab174 1511
f8fb971e
JH
1512static int ignore_symref_update(const char *refname)
1513{
1514 unsigned char sha1[20];
1515 int flag;
1516
1517 if (!resolve_ref_unsafe(refname, sha1, 0, &flag))
1518 return 0; /* non-existing refs are OK */
1519 return (flag & REF_ISSYMREF);
1520}
1521
4577370e 1522static struct ref *get_expanded_map(const struct ref *remote_refs,
d71ab174
DB
1523 const struct refspec *refspec)
1524{
4577370e 1525 const struct ref *ref;
d71ab174
DB
1526 struct ref *ret = NULL;
1527 struct ref **tail = &ret;
1528
e928213f 1529 char *expn_name;
d71ab174
DB
1530
1531 for (ref = remote_refs; ref; ref = ref->next) {
1532 if (strchr(ref->name, '^'))
1533 continue; /* a dereference item */
e928213f 1534 if (match_name_with_pattern(refspec->src, ref->name,
f8fb971e
JH
1535 refspec->dst, &expn_name) &&
1536 !ignore_symref_update(expn_name)) {
d71ab174 1537 struct ref *cpy = copy_ref(ref);
d71ab174 1538
e928213f
DB
1539 cpy->peer_ref = alloc_ref(expn_name);
1540 free(expn_name);
d71ab174
DB
1541 if (refspec->force)
1542 cpy->peer_ref->force = 1;
1543 *tail = cpy;
1544 tail = &cpy->next;
1545 }
1546 }
1547
1548 return ret;
1549}
1550
4577370e 1551static const struct ref *find_ref_by_name_abbrev(const struct ref *refs, const char *name)
d71ab174 1552{
4577370e 1553 const struct ref *ref;
d71ab174 1554 for (ref = refs; ref; ref = ref->next) {
605b4978 1555 if (refname_match(name, ref->name, ref_fetch_rules))
d71ab174
DB
1556 return ref;
1557 }
1558 return NULL;
1559}
1560
4577370e 1561struct ref *get_remote_ref(const struct ref *remote_refs, const char *name)
d71ab174 1562{
4577370e 1563 const struct ref *ref = find_ref_by_name_abbrev(remote_refs, name);
d71ab174
DB
1564
1565 if (!ref)
9ad7c5ae 1566 return NULL;
d71ab174
DB
1567
1568 return copy_ref(ref);
1569}
1570
1571static struct ref *get_local_ref(const char *name)
1572{
3eb96997 1573 if (!name || name[0] == '\0')
d71ab174
DB
1574 return NULL;
1575
59c69c0c
RS
1576 if (!prefixcmp(name, "refs/"))
1577 return alloc_ref(name);
d71ab174
DB
1578
1579 if (!prefixcmp(name, "heads/") ||
1580 !prefixcmp(name, "tags/") ||
8009768e
RS
1581 !prefixcmp(name, "remotes/"))
1582 return alloc_ref_with_prefix("refs/", 5, name);
d71ab174 1583
8009768e 1584 return alloc_ref_with_prefix("refs/heads/", 11, name);
d71ab174
DB
1585}
1586
4577370e 1587int get_fetch_map(const struct ref *remote_refs,
d71ab174 1588 const struct refspec *refspec,
9ad7c5ae
JH
1589 struct ref ***tail,
1590 int missing_ok)
d71ab174 1591{
ef00d150 1592 struct ref *ref_map, **rmp;
d71ab174
DB
1593
1594 if (refspec->pattern) {
1595 ref_map = get_expanded_map(remote_refs, refspec);
1596 } else {
9ad7c5ae
JH
1597 const char *name = refspec->src[0] ? refspec->src : "HEAD";
1598
6e7b66ee
JH
1599 if (refspec->exact_sha1) {
1600 ref_map = alloc_ref(name);
1601 get_sha1_hex(name, ref_map->old_sha1);
1602 } else {
1603 ref_map = get_remote_ref(remote_refs, name);
1604 }
9ad7c5ae
JH
1605 if (!missing_ok && !ref_map)
1606 die("Couldn't find remote ref %s", name);
1607 if (ref_map) {
1608 ref_map->peer_ref = get_local_ref(refspec->dst);
1609 if (ref_map->peer_ref && refspec->force)
1610 ref_map->peer_ref->force = 1;
1611 }
d71ab174
DB
1612 }
1613
ef00d150
DB
1614 for (rmp = &ref_map; *rmp; ) {
1615 if ((*rmp)->peer_ref) {
5c08c1f2
JH
1616 if (prefixcmp((*rmp)->peer_ref->name, "refs/") ||
1617 check_refname_format((*rmp)->peer_ref->name, 0)) {
ef00d150
DB
1618 struct ref *ignore = *rmp;
1619 error("* Ignoring funny ref '%s' locally",
1620 (*rmp)->peer_ref->name);
1621 *rmp = (*rmp)->next;
1622 free(ignore->peer_ref);
1623 free(ignore);
1624 continue;
1625 }
1626 }
1627 rmp = &((*rmp)->next);
d71ab174
DB
1628 }
1629
8f70a765
AR
1630 if (ref_map)
1631 tail_link_ref(ref_map, tail);
d71ab174
DB
1632
1633 return 0;
1634}
be885d96
DB
1635
1636int resolve_remote_symref(struct ref *ref, struct ref *list)
1637{
1638 if (!ref->symref)
1639 return 0;
1640 for (; list; list = list->next)
1641 if (!strcmp(ref->symref, list->name)) {
1642 hashcpy(ref->old_sha1, list->old_sha1);
1643 return 0;
1644 }
1645 return 1;
1646}
6d21bf96 1647
ec8452d5
JS
1648static void unmark_and_free(struct commit_list *list, unsigned int mark)
1649{
1650 while (list) {
1651 struct commit_list *temp = list;
1652 temp->item->object.flags &= ~mark;
1653 list = temp->next;
1654 free(temp);
1655 }
1656}
1657
1658int ref_newer(const unsigned char *new_sha1, const unsigned char *old_sha1)
1659{
1660 struct object *o;
1661 struct commit *old, *new;
1662 struct commit_list *list, *used;
1663 int found = 0;
1664
75e5c0dc
JH
1665 /*
1666 * Both new and old must be commit-ish and new is descendant of
ec8452d5
JS
1667 * old. Otherwise we require --force.
1668 */
1669 o = deref_tag(parse_object(old_sha1), NULL, 0);
1670 if (!o || o->type != OBJ_COMMIT)
1671 return 0;
1672 old = (struct commit *) o;
1673
1674 o = deref_tag(parse_object(new_sha1), NULL, 0);
1675 if (!o || o->type != OBJ_COMMIT)
1676 return 0;
1677 new = (struct commit *) o;
1678
1679 if (parse_commit(new) < 0)
1680 return 0;
1681
1682 used = list = NULL;
1683 commit_list_insert(new, &list);
1684 while (list) {
1685 new = pop_most_recent_commit(&list, TMP_MARK);
1686 commit_list_insert(new, &used);
1687 if (new == old) {
1688 found = 1;
1689 break;
1690 }
1691 }
1692 unmark_and_free(list, TMP_MARK);
1693 unmark_and_free(used, TMP_MARK);
1694 return found;
1695}
1696
6d21bf96
JH
1697/*
1698 * Return true if there is anything to report, otherwise false.
1699 */
1700int stat_tracking_info(struct branch *branch, int *num_ours, int *num_theirs)
1701{
1702 unsigned char sha1[20];
1703 struct commit *ours, *theirs;
1704 char symmetric[84];
1705 struct rev_info revs;
1706 const char *rev_argv[10], *base;
1707 int rev_argc;
1708
1709 /*
1710 * Nothing to report unless we are marked to build on top of
1711 * somebody else.
1712 */
1713 if (!branch ||
1714 !branch->merge || !branch->merge[0] || !branch->merge[0]->dst)
1715 return 0;
1716
1717 /*
1718 * If what we used to build on no longer exists, there is
1719 * nothing to report.
1720 */
1721 base = branch->merge[0]->dst;
c6893323 1722 if (read_ref(base, sha1))
6d21bf96 1723 return 0;
57ffc5f8 1724 theirs = lookup_commit_reference(sha1);
6d21bf96
JH
1725 if (!theirs)
1726 return 0;
1727
c6893323 1728 if (read_ref(branch->refname, sha1))
6d21bf96 1729 return 0;
57ffc5f8 1730 ours = lookup_commit_reference(sha1);
6d21bf96
JH
1731 if (!ours)
1732 return 0;
1733
1734 /* are we the same? */
1735 if (theirs == ours)
1736 return 0;
1737
8fbf879e 1738 /* Run "rev-list --left-right ours...theirs" internally... */
6d21bf96
JH
1739 rev_argc = 0;
1740 rev_argv[rev_argc++] = NULL;
1741 rev_argv[rev_argc++] = "--left-right";
1742 rev_argv[rev_argc++] = symmetric;
1743 rev_argv[rev_argc++] = "--";
1744 rev_argv[rev_argc] = NULL;
1745
1746 strcpy(symmetric, sha1_to_hex(ours->object.sha1));
1747 strcpy(symmetric + 40, "...");
1748 strcpy(symmetric + 43, sha1_to_hex(theirs->object.sha1));
1749
1750 init_revisions(&revs, NULL);
1751 setup_revisions(rev_argc, rev_argv, &revs, NULL);
1752 prepare_revision_walk(&revs);
1753
1754 /* ... and count the commits on each side. */
1755 *num_ours = 0;
1756 *num_theirs = 0;
1757 while (1) {
1758 struct commit *c = get_revision(&revs);
1759 if (!c)
1760 break;
1761 if (c->object.flags & SYMMETRIC_LEFT)
1762 (*num_ours)++;
1763 else
1764 (*num_theirs)++;
1765 }
c0234b2e
JH
1766
1767 /* clear object flags smudged by the above traversal */
1768 clear_commit_marks(ours, ALL_REV_FLAGS);
1769 clear_commit_marks(theirs, ALL_REV_FLAGS);
6d21bf96
JH
1770 return 1;
1771}
1772
1773/*
1774 * Return true when there is anything to report, otherwise false.
1775 */
1776int format_tracking_info(struct branch *branch, struct strbuf *sb)
1777{
1778 int num_ours, num_theirs;
4de53ce0 1779 const char *base;
6d21bf96
JH
1780
1781 if (!stat_tracking_info(branch, &num_ours, &num_theirs))
1782 return 0;
1783
1784 base = branch->merge[0]->dst;
45972ffb 1785 base = shorten_unambiguous_ref(base, 0);
c190ced6 1786 if (!num_theirs) {
8a5b7494
JX
1787 strbuf_addf(sb,
1788 Q_("Your branch is ahead of '%s' by %d commit.\n",
1789 "Your branch is ahead of '%s' by %d commits.\n",
1790 num_ours),
1791 base, num_ours);
491e3075
JK
1792 if (advice_status_hints)
1793 strbuf_addf(sb,
1794 _(" (use \"git push\" to publish your local commits)\n"));
c190ced6 1795 } else if (!num_ours) {
8a5b7494
JX
1796 strbuf_addf(sb,
1797 Q_("Your branch is behind '%s' by %d commit, "
1798 "and can be fast-forwarded.\n",
1799 "Your branch is behind '%s' by %d commits, "
1800 "and can be fast-forwarded.\n",
1801 num_theirs),
1802 base, num_theirs);
491e3075
JK
1803 if (advice_status_hints)
1804 strbuf_addf(sb,
1805 _(" (use \"git pull\" to update your local branch)\n"));
c190ced6 1806 } else {
8a5b7494
JX
1807 strbuf_addf(sb,
1808 Q_("Your branch and '%s' have diverged,\n"
1809 "and have %d and %d different commit each, "
1810 "respectively.\n",
1811 "Your branch and '%s' have diverged,\n"
1812 "and have %d and %d different commits each, "
1813 "respectively.\n",
1814 num_theirs),
1815 base, num_ours, num_theirs);
491e3075
JK
1816 if (advice_status_hints)
1817 strbuf_addf(sb,
1818 _(" (use \"git pull\" to merge the remote branch into yours)\n"));
c190ced6 1819 }
6d21bf96
JH
1820 return 1;
1821}
454e2025
JS
1822
1823static int one_local_ref(const char *refname, const unsigned char *sha1, int flag, void *cb_data)
1824{
1825 struct ref ***local_tail = cb_data;
1826 struct ref *ref;
1827 int len;
1828
1829 /* we already know it starts with refs/ to get here */
8d9c5010 1830 if (check_refname_format(refname + 5, 0))
454e2025
JS
1831 return 0;
1832
1833 len = strlen(refname) + 1;
1834 ref = xcalloc(1, sizeof(*ref) + len);
1835 hashcpy(ref->new_sha1, sha1);
1836 memcpy(ref->name, refname, len);
1837 **local_tail = ref;
1838 *local_tail = &ref->next;
1839 return 0;
1840}
1841
1842struct ref *get_local_heads(void)
1843{
55f0566f 1844 struct ref *local_refs = NULL, **local_tail = &local_refs;
454e2025
JS
1845 for_each_ref(one_local_ref, &local_tail);
1846 return local_refs;
1847}
8ef51733 1848
4229f1fa
JS
1849struct ref *guess_remote_head(const struct ref *head,
1850 const struct ref *refs,
1851 int all)
8ef51733 1852{
8ef51733 1853 const struct ref *r;
4229f1fa
JS
1854 struct ref *list = NULL;
1855 struct ref **tail = &list;
8ef51733 1856
6cb4e6cc 1857 if (!head)
8ef51733
JS
1858 return NULL;
1859
fbb074c2
JK
1860 /*
1861 * Some transports support directly peeking at
1862 * where HEAD points; if that is the case, then
1863 * we don't have to guess.
1864 */
1865 if (head->symref)
1866 return copy_ref(find_ref_by_name(refs, head->symref));
1867
8ef51733 1868 /* If refs/heads/master could be right, it is. */
4229f1fa
JS
1869 if (!all) {
1870 r = find_ref_by_name(refs, "refs/heads/master");
1871 if (r && !hashcmp(r->old_sha1, head->old_sha1))
1872 return copy_ref(r);
1873 }
8ef51733
JS
1874
1875 /* Look for another ref that points there */
4229f1fa 1876 for (r = refs; r; r = r->next) {
61adfd30
JK
1877 if (r != head &&
1878 !prefixcmp(r->name, "refs/heads/") &&
1879 !hashcmp(r->old_sha1, head->old_sha1)) {
4229f1fa
JS
1880 *tail = copy_ref(r);
1881 tail = &((*tail)->next);
1882 if (!all)
1883 break;
1884 }
1885 }
8ef51733 1886
4229f1fa 1887 return list;
8ef51733 1888}
f2ef6075
JS
1889
1890struct stale_heads_info {
f2ef6075
JS
1891 struct string_list *ref_names;
1892 struct ref **stale_refs_tail;
ed43de6e
CMN
1893 struct refspec *refs;
1894 int ref_count;
f2ef6075
JS
1895};
1896
1897static int get_stale_heads_cb(const char *refname,
1898 const unsigned char *sha1, int flags, void *cb_data)
1899{
1900 struct stale_heads_info *info = cb_data;
ed43de6e
CMN
1901 struct refspec query;
1902 memset(&query, 0, sizeof(struct refspec));
1903 query.dst = (char *)refname;
1904
1905 if (query_refspecs(info->refs, info->ref_count, &query))
1906 return 0; /* No matches */
1907
1908 /*
1909 * If we did find a suitable refspec and it's not a symref and
1910 * it's not in the list of refs that currently exist in that
1911 * remote we consider it to be stale.
1912 */
1913 if (!((flags & REF_ISSYMREF) ||
1914 string_list_has_string(info->ref_names, query.src))) {
1915 struct ref *ref = make_linked_ref(refname, &info->stale_refs_tail);
1916 hashcpy(ref->new_sha1, sha1);
f2ef6075 1917 }
ed43de6e
CMN
1918
1919 free(query.src);
f2ef6075
JS
1920 return 0;
1921}
1922
ed43de6e 1923struct ref *get_stale_heads(struct refspec *refs, int ref_count, struct ref *fetch_map)
f2ef6075
JS
1924{
1925 struct ref *ref, *stale_refs = NULL;
183113a5 1926 struct string_list ref_names = STRING_LIST_INIT_NODUP;
f2ef6075 1927 struct stale_heads_info info;
f2ef6075
JS
1928 info.ref_names = &ref_names;
1929 info.stale_refs_tail = &stale_refs;
ed43de6e
CMN
1930 info.refs = refs;
1931 info.ref_count = ref_count;
f2ef6075 1932 for (ref = fetch_map; ref; ref = ref->next)
1d2f80fa 1933 string_list_append(&ref_names, ref->name);
f2ef6075
JS
1934 sort_string_list(&ref_names);
1935 for_each_ref(get_stale_heads_cb, &info);
1936 string_list_clear(&ref_names, 0);
1937 return stale_refs;
1938}