object: convert parse_object* to take struct object_id
[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"
0b282cc4 11#include "argv-array.h"
5751f490 12
6ddba5e2
FC
13enum map_direction { FROM_SRC, FROM_DST };
14
e0aaa29f
DB
15static struct refspec s_tag_refspec = {
16 0,
17 1,
b84c343c 18 0,
6e7b66ee 19 0,
08fbdb30
DB
20 "refs/tags/*",
21 "refs/tags/*"
e0aaa29f
DB
22};
23
24const struct refspec *tag_refspec = &s_tag_refspec;
25
844112ca
JH
26struct counted_string {
27 size_t len;
28 const char *s;
29};
55029ae4
DB
30struct rewrite {
31 const char *base;
844112ca
JH
32 size_t baselen;
33 struct counted_string *instead_of;
55029ae4
DB
34 int instead_of_nr;
35 int instead_of_alloc;
36};
d071d942
JT
37struct rewrites {
38 struct rewrite **rewrite;
39 int rewrite_alloc;
40 int rewrite_nr;
41};
55029ae4 42
5751f490 43static struct remote **remotes;
2d31347b
DB
44static int remotes_alloc;
45static int remotes_nr;
d0da003d 46static struct hashmap remotes_hash;
5751f490 47
cf818348 48static struct branch **branches;
2d31347b
DB
49static int branches_alloc;
50static int branches_nr;
cf818348
DB
51
52static struct branch *current_branch;
f24f715e 53static const char *pushremote_name;
cf818348 54
d071d942 55static struct rewrites rewrites;
1c2eafb8 56static struct rewrites rewrites_push;
55029ae4 57
0a4da29d
DB
58static int valid_remote(const struct remote *remote)
59{
c578f51d 60 return (!!remote->url) || (!!remote->foreign_vcs);
0a4da29d
DB
61}
62
d071d942 63static const char *alias_url(const char *url, struct rewrites *r)
55029ae4
DB
64{
65 int i, j;
844112ca
JH
66 struct counted_string *longest;
67 int longest_i;
68
69 longest = NULL;
70 longest_i = -1;
d071d942
JT
71 for (i = 0; i < r->rewrite_nr; i++) {
72 if (!r->rewrite[i])
55029ae4 73 continue;
d071d942 74 for (j = 0; j < r->rewrite[i]->instead_of_nr; j++) {
59556548 75 if (starts_with(url, r->rewrite[i]->instead_of[j].s) &&
844112ca 76 (!longest ||
d071d942
JT
77 longest->len < r->rewrite[i]->instead_of[j].len)) {
78 longest = &(r->rewrite[i]->instead_of[j]);
844112ca 79 longest_i = i;
55029ae4
DB
80 }
81 }
82 }
844112ca
JH
83 if (!longest)
84 return url;
85
75faa45a 86 return xstrfmt("%s%s", r->rewrite[longest_i]->base, url + longest->len);
55029ae4
DB
87}
88
5751f490
DB
89static void add_push_refspec(struct remote *remote, const char *ref)
90{
2d31347b
DB
91 ALLOC_GROW(remote->push_refspec,
92 remote->push_refspec_nr + 1,
93 remote->push_refspec_alloc);
94 remote->push_refspec[remote->push_refspec_nr++] = ref;
5751f490
DB
95}
96
5d46c9d4
DB
97static void add_fetch_refspec(struct remote *remote, const char *ref)
98{
2d31347b
DB
99 ALLOC_GROW(remote->fetch_refspec,
100 remote->fetch_refspec_nr + 1,
101 remote->fetch_refspec_alloc);
102 remote->fetch_refspec[remote->fetch_refspec_nr++] = ref;
5d46c9d4
DB
103}
104
28b91f8a 105static void add_url(struct remote *remote, const char *url)
5751f490 106{
2d31347b
DB
107 ALLOC_GROW(remote->url, remote->url_nr + 1, remote->url_alloc);
108 remote->url[remote->url_nr++] = url;
5751f490
DB
109}
110
20346234
MG
111static void add_pushurl(struct remote *remote, const char *pushurl)
112{
113 ALLOC_GROW(remote->pushurl, remote->pushurl_nr + 1, remote->pushurl_alloc);
114 remote->pushurl[remote->pushurl_nr++] = pushurl;
115}
116
1c2eafb8
JT
117static void add_pushurl_alias(struct remote *remote, const char *url)
118{
119 const char *pushurl = alias_url(url, &rewrites_push);
120 if (pushurl != url)
121 add_pushurl(remote, pushurl);
122}
123
124static void add_url_alias(struct remote *remote, const char *url)
125{
126 add_url(remote, alias_url(url, &rewrites));
127 add_pushurl_alias(remote, url);
128}
129
d0da003d
PR
130struct remotes_hash_key {
131 const char *str;
132 int len;
133};
134
135static int remotes_hash_cmp(const struct remote *a, const struct remote *b, const struct remotes_hash_key *key)
136{
137 if (key)
138 return strncmp(a->name, key->str, key->len) || a->name[key->len];
139 else
140 return strcmp(a->name, b->name);
141}
142
143static inline void init_remotes_hash(void)
144{
145 if (!remotes_hash.cmpfn)
146 hashmap_init(&remotes_hash, (hashmap_cmp_fn)remotes_hash_cmp, 0);
147}
148
5751f490
DB
149static struct remote *make_remote(const char *name, int len)
150{
d0da003d
PR
151 struct remote *ret, *replaced;
152 struct remotes_hash_key lookup;
153 struct hashmap_entry lookup_entry;
5751f490 154
d0da003d
PR
155 if (!len)
156 len = strlen(name);
157
158 init_remotes_hash();
159 lookup.str = name;
160 lookup.len = len;
161 hashmap_entry_init(&lookup_entry, memhash(name, len));
162
163 if ((ret = hashmap_get(&remotes_hash, &lookup_entry, &lookup)) != NULL)
164 return ret;
5751f490 165
2d31347b 166 ret = xcalloc(1, sizeof(struct remote));
737c5a9c 167 ret->prune = -1; /* unspecified */
2d31347b
DB
168 ALLOC_GROW(remotes, remotes_nr + 1, remotes_alloc);
169 remotes[remotes_nr++] = ret;
d0da003d
PR
170 ret->name = xstrndup(name, len);
171
172 hashmap_entry_init(ret, lookup_entry.hash);
173 replaced = hashmap_put(&remotes_hash, ret);
174 assert(replaced == NULL); /* no previous entry overwritten */
2d31347b 175 return ret;
5751f490
DB
176}
177
cf818348
DB
178static void add_merge(struct branch *branch, const char *name)
179{
2d31347b
DB
180 ALLOC_GROW(branch->merge_name, branch->merge_nr + 1,
181 branch->merge_alloc);
182 branch->merge_name[branch->merge_nr++] = name;
cf818348
DB
183}
184
185static struct branch *make_branch(const char *name, int len)
186{
2d31347b
DB
187 struct branch *ret;
188 int i;
cf818348 189
2d31347b
DB
190 for (i = 0; i < branches_nr; i++) {
191 if (len ? (!strncmp(name, branches[i]->name, len) &&
192 !branches[i]->name[len]) :
193 !strcmp(name, branches[i]->name))
194 return branches[i];
cf818348
DB
195 }
196
2d31347b
DB
197 ALLOC_GROW(branches, branches_nr + 1, branches_alloc);
198 ret = xcalloc(1, sizeof(struct branch));
199 branches[branches_nr++] = ret;
cf818348 200 if (len)
2d31347b 201 ret->name = xstrndup(name, len);
cf818348 202 else
2d31347b 203 ret->name = xstrdup(name);
fa3f60b7 204 ret->refname = xstrfmt("refs/heads/%s", ret->name);
cf818348 205
2d31347b 206 return ret;
cf818348
DB
207}
208
d071d942 209static struct rewrite *make_rewrite(struct rewrites *r, const char *base, int len)
55029ae4
DB
210{
211 struct rewrite *ret;
212 int i;
213
d071d942 214 for (i = 0; i < r->rewrite_nr; i++) {
844112ca 215 if (len
d071d942
JT
216 ? (len == r->rewrite[i]->baselen &&
217 !strncmp(base, r->rewrite[i]->base, len))
218 : !strcmp(base, r->rewrite[i]->base))
219 return r->rewrite[i];
55029ae4
DB
220 }
221
d071d942 222 ALLOC_GROW(r->rewrite, r->rewrite_nr + 1, r->rewrite_alloc);
55029ae4 223 ret = xcalloc(1, sizeof(struct rewrite));
d071d942 224 r->rewrite[r->rewrite_nr++] = ret;
844112ca 225 if (len) {
55029ae4 226 ret->base = xstrndup(base, len);
844112ca
JH
227 ret->baselen = len;
228 }
229 else {
55029ae4 230 ret->base = xstrdup(base);
844112ca
JH
231 ret->baselen = strlen(base);
232 }
55029ae4
DB
233 return ret;
234}
235
236static void add_instead_of(struct rewrite *rewrite, const char *instead_of)
237{
238 ALLOC_GROW(rewrite->instead_of, rewrite->instead_of_nr + 1, rewrite->instead_of_alloc);
844112ca
JH
239 rewrite->instead_of[rewrite->instead_of_nr].s = instead_of;
240 rewrite->instead_of[rewrite->instead_of_nr].len = strlen(instead_of);
241 rewrite->instead_of_nr++;
55029ae4
DB
242}
243
0e265a92
JK
244static const char *skip_spaces(const char *s)
245{
246 while (isspace(*s))
247 s++;
248 return s;
249}
250
5751f490
DB
251static void read_remotes_file(struct remote *remote)
252{
0e265a92 253 struct strbuf buf = STRBUF_INIT;
5751f490
DB
254 FILE *f = fopen(git_path("remotes/%s", remote->name), "r");
255
256 if (!f)
257 return;
e459b073 258 remote->configured_in_repo = 1;
89cf4c70 259 remote->origin = REMOTE_REMOTES;
18814d0e 260 while (strbuf_getline(&buf, f) != EOF) {
0e265a92 261 const char *v;
5751f490 262
0e265a92 263 strbuf_rtrim(&buf);
5751f490 264
0e265a92
JK
265 if (skip_prefix(buf.buf, "URL:", &v))
266 add_url_alias(remote, xstrdup(skip_spaces(v)));
267 else if (skip_prefix(buf.buf, "Push:", &v))
268 add_push_refspec(remote, xstrdup(skip_spaces(v)));
269 else if (skip_prefix(buf.buf, "Pull:", &v))
270 add_fetch_refspec(remote, xstrdup(skip_spaces(v)));
5751f490 271 }
0e265a92 272 strbuf_release(&buf);
5751f490
DB
273 fclose(f);
274}
275
276static void read_branches_file(struct remote *remote)
277{
cf818348 278 char *frag;
f28e3ab2
JK
279 struct strbuf buf = STRBUF_INIT;
280 FILE *f = fopen(git_path("branches/%s", remote->name), "r");
5751f490
DB
281
282 if (!f)
283 return;
f28e3ab2 284
8f309aeb 285 strbuf_getline_lf(&buf, f);
0fb19906 286 fclose(f);
f28e3ab2
JK
287 strbuf_trim(&buf);
288 if (!buf.len) {
289 strbuf_release(&buf);
5751f490 290 return;
f28e3ab2
JK
291 }
292
e459b073 293 remote->configured_in_repo = 1;
89cf4c70 294 remote->origin = REMOTE_BRANCHES;
472fa4cd
DB
295
296 /*
55cfde25 297 * The branches file would have URL and optionally
472fa4cd 298 * #branch specified. The "master" (or specified) branch is
f28e3ab2
JK
299 * fetched and stored in the local branch matching the
300 * remote name.
472fa4cd 301 */
f28e3ab2
JK
302 frag = strchr(buf.buf, '#');
303 if (frag)
cf818348 304 *(frag++) = '\0';
f28e3ab2
JK
305 else
306 frag = "master";
307
308 add_url_alias(remote, strbuf_detach(&buf, NULL));
309 add_fetch_refspec(remote, xstrfmt("refs/heads/%s:refs/heads/%s",
310 frag, remote->name));
55cfde25 311
18afe101
MK
312 /*
313 * Cogito compatible push: push current HEAD to remote #branch
314 * (master if missing)
315 */
f28e3ab2 316 add_push_refspec(remote, xstrfmt("HEAD:refs/heads/%s", frag));
d71ab174 317 remote->fetch_tags = 1; /* always auto-follow */
5751f490
DB
318}
319
ef90d6d4 320static int handle_config(const char *key, const char *value, void *cb)
5751f490
DB
321{
322 const char *name;
bc60f8a7 323 int namelen;
5751f490
DB
324 const char *subkey;
325 struct remote *remote;
cf818348 326 struct branch *branch;
bc60f8a7
TG
327 if (parse_config_key(key, "branch", &name, &namelen, &subkey) >= 0) {
328 if (!name)
cf818348 329 return 0;
bc60f8a7
TG
330 branch = make_branch(name, namelen);
331 if (!strcmp(subkey, "remote")) {
e41bf352 332 return git_config_string(&branch->remote_name, key, value);
bc60f8a7 333 } else if (!strcmp(subkey, "pushremote")) {
da66b274 334 return git_config_string(&branch->pushremote_name, key, value);
bc60f8a7 335 } else if (!strcmp(subkey, "merge")) {
d2370cc2
JH
336 if (!value)
337 return config_error_nonbool(key);
cf818348 338 add_merge(branch, xstrdup(value));
d2370cc2 339 }
cf818348 340 return 0;
5751f490 341 }
bc60f8a7 342 if (parse_config_key(key, "url", &name, &namelen, &subkey) >= 0) {
55029ae4 343 struct rewrite *rewrite;
bc60f8a7 344 if (!name)
55029ae4 345 return 0;
bc60f8a7
TG
346 if (!strcmp(subkey, "insteadof")) {
347 rewrite = make_rewrite(&rewrites, name, namelen);
1c2eafb8
JT
348 if (!value)
349 return config_error_nonbool(key);
350 add_instead_of(rewrite, xstrdup(value));
bc60f8a7
TG
351 } else if (!strcmp(subkey, "pushinsteadof")) {
352 rewrite = make_rewrite(&rewrites_push, name, namelen);
55029ae4
DB
353 if (!value)
354 return config_error_nonbool(key);
355 add_instead_of(rewrite, xstrdup(value));
356 }
357 }
224c2171 358
bc60f8a7 359 if (parse_config_key(key, "remote", &name, &namelen, &subkey) < 0)
5751f490 360 return 0;
224c2171
RR
361
362 /* Handle remote.* variables */
bc60f8a7 363 if (!name && !strcmp(subkey, "pushdefault"))
224c2171
RR
364 return git_config_string(&pushremote_name, key, value);
365
bc60f8a7
TG
366 if (!name)
367 return 0;
224c2171 368 /* Handle remote.<name>.* variables */
c82efafc
BC
369 if (*name == '/') {
370 warning("Config remote shorthand cannot begin with '/': %s",
371 name);
372 return 0;
373 }
bc60f8a7 374 remote = make_remote(name, namelen);
89cf4c70 375 remote->origin = REMOTE_CONFIG;
e459b073
JS
376 if (current_config_scope() == CONFIG_SCOPE_REPO)
377 remote->configured_in_repo = 1;
bc60f8a7 378 if (!strcmp(subkey, "mirror"))
84bb2dfd 379 remote->mirror = git_config_bool(key, value);
bc60f8a7 380 else if (!strcmp(subkey, "skipdefaultupdate"))
84bb2dfd 381 remote->skip_default_update = git_config_bool(key, value);
bc60f8a7 382 else if (!strcmp(subkey, "skipfetchall"))
7cc91a2f 383 remote->skip_default_update = git_config_bool(key, value);
bc60f8a7 384 else if (!strcmp(subkey, "prune"))
737c5a9c 385 remote->prune = git_config_bool(key, value);
bc60f8a7 386 else if (!strcmp(subkey, "url")) {
84bb2dfd
PB
387 const char *v;
388 if (git_config_string(&v, key, value))
389 return -1;
390 add_url(remote, v);
bc60f8a7 391 } else if (!strcmp(subkey, "pushurl")) {
20346234
MG
392 const char *v;
393 if (git_config_string(&v, key, value))
394 return -1;
395 add_pushurl(remote, v);
bc60f8a7 396 } else if (!strcmp(subkey, "push")) {
84bb2dfd
PB
397 const char *v;
398 if (git_config_string(&v, key, value))
399 return -1;
400 add_push_refspec(remote, v);
bc60f8a7 401 } else if (!strcmp(subkey, "fetch")) {
84bb2dfd
PB
402 const char *v;
403 if (git_config_string(&v, key, value))
404 return -1;
405 add_fetch_refspec(remote, v);
bc60f8a7 406 } else if (!strcmp(subkey, "receivepack")) {
84bb2dfd
PB
407 const char *v;
408 if (git_config_string(&v, key, value))
409 return -1;
5751f490 410 if (!remote->receivepack)
84bb2dfd 411 remote->receivepack = v;
5751f490
DB
412 else
413 error("more than one receivepack given, using the first");
bc60f8a7 414 } else if (!strcmp(subkey, "uploadpack")) {
84bb2dfd
PB
415 const char *v;
416 if (git_config_string(&v, key, value))
417 return -1;
0012ba21 418 if (!remote->uploadpack)
84bb2dfd 419 remote->uploadpack = v;
0012ba21
DB
420 else
421 error("more than one uploadpack given, using the first");
bc60f8a7 422 } else if (!strcmp(subkey, "tagopt")) {
d71ab174
DB
423 if (!strcmp(value, "--no-tags"))
424 remote->fetch_tags = -1;
944163a4
ST
425 else if (!strcmp(value, "--tags"))
426 remote->fetch_tags = 2;
bc60f8a7 427 } else if (!strcmp(subkey, "proxy")) {
84bb2dfd
PB
428 return git_config_string((const char **)&remote->http_proxy,
429 key, value);
bc60f8a7 430 } else if (!strcmp(subkey, "proxyauthmethod")) {
ef976395
KF
431 return git_config_string((const char **)&remote->http_proxy_authmethod,
432 key, value);
bc60f8a7 433 } else if (!strcmp(subkey, "vcs")) {
c578f51d 434 return git_config_string(&remote->foreign_vcs, key, value);
84bb2dfd 435 }
5751f490
DB
436 return 0;
437}
438
55029ae4
DB
439static void alias_all_urls(void)
440{
441 int i, j;
442 for (i = 0; i < remotes_nr; i++) {
1c2eafb8 443 int add_pushurl_aliases;
55029ae4
DB
444 if (!remotes[i])
445 continue;
20346234 446 for (j = 0; j < remotes[i]->pushurl_nr; j++) {
d071d942 447 remotes[i]->pushurl[j] = alias_url(remotes[i]->pushurl[j], &rewrites);
20346234 448 }
1c2eafb8
JT
449 add_pushurl_aliases = remotes[i]->pushurl_nr == 0;
450 for (j = 0; j < remotes[i]->url_nr; j++) {
451 if (add_pushurl_aliases)
452 add_pushurl_alias(remotes[i], remotes[i]->url[j]);
453 remotes[i]->url[j] = alias_url(remotes[i]->url[j], &rewrites);
454 }
55029ae4
DB
455 }
456}
457
5751f490
DB
458static void read_config(void)
459{
e41bf352 460 static int loaded;
fcd30b13 461 struct object_id oid;
5751f490 462 int flag;
e41bf352
JK
463
464 if (loaded)
5751f490 465 return;
e41bf352
JK
466 loaded = 1;
467
5751f490 468 current_branch = NULL;
f2f12d16
JK
469 if (startup_info->have_repository) {
470 const char *head_ref = resolve_ref_unsafe("HEAD", 0, oid.hash, &flag);
471 if (head_ref && (flag & REF_ISSYMREF) &&
472 skip_prefix(head_ref, "refs/heads/", &head_ref)) {
473 current_branch = make_branch(head_ref, 0);
474 }
5751f490 475 }
ef90d6d4 476 git_config(handle_config, NULL);
55029ae4 477 alias_all_urls();
5751f490
DB
478}
479
2cb1f36d
BC
480/*
481 * This function frees a refspec array.
482 * Warning: code paths should be checked to ensure that the src
483 * and dst pointers are always freeable pointers as well
484 * as the refspec pointer itself.
485 */
697d7f5d 486static void free_refspecs(struct refspec *refspec, int nr_refspec)
2cb1f36d
BC
487{
488 int i;
489
490 if (!refspec)
491 return;
492
493 for (i = 0; i < nr_refspec; i++) {
494 free(refspec[i].src);
495 free(refspec[i].dst);
496 }
497 free(refspec);
498}
499
24b6177e 500static struct refspec *parse_refspec_internal(int nr_refspec, const char **refspec, int fetch, int verify)
6b62816c
DB
501{
502 int i;
da7a478b 503 struct refspec *rs = xcalloc(nr_refspec, sizeof(*rs));
46220ca1 504
6b62816c 505 for (i = 0; i < nr_refspec; i++) {
47c6ef1c 506 size_t llen;
46220ca1
JH
507 int is_glob;
508 const char *lhs, *rhs;
8d9c5010 509 int flags;
46220ca1 510
8e76bf3f 511 is_glob = 0;
46220ca1
JH
512
513 lhs = refspec[i];
514 if (*lhs == '+') {
6b62816c 515 rs[i].force = 1;
46220ca1 516 lhs++;
6b62816c 517 }
46220ca1
JH
518
519 rhs = strrchr(lhs, ':');
a83619d6
PB
520
521 /*
522 * Before going on, special case ":" (or "+:") as a refspec
def24991 523 * for pushing matching refs.
a83619d6
PB
524 */
525 if (!fetch && rhs == lhs && rhs[1] == '\0') {
526 rs[i].matching = 1;
527 continue;
528 }
529
46220ca1 530 if (rhs) {
47c6ef1c 531 size_t rlen = strlen(++rhs);
abd2bde7 532 is_glob = (1 <= rlen && strchr(rhs, '*'));
08fbdb30 533 rs[i].dst = xstrndup(rhs, rlen);
6b62816c 534 }
ef00d150 535
46220ca1 536 llen = (rhs ? (rhs - lhs - 1) : strlen(lhs));
abd2bde7 537 if (1 <= llen && memchr(lhs, '*', llen)) {
7d19da46
JH
538 if ((rhs && !is_glob) || (!rhs && fetch))
539 goto invalid;
540 is_glob = 1;
7d19da46
JH
541 } else if (rhs && is_glob) {
542 goto invalid;
ef00d150 543 }
7d19da46 544
46220ca1
JH
545 rs[i].pattern = is_glob;
546 rs[i].src = xstrndup(lhs, llen);
8d9c5010 547 flags = REFNAME_ALLOW_ONELEVEL | (is_glob ? REFNAME_REFSPEC_PATTERN : 0);
46220ca1
JH
548
549 if (fetch) {
fcd30b13 550 struct object_id unused;
6e7b66ee 551
def24991 552 /* LHS */
46220ca1 553 if (!*rs[i].src)
def24991 554 ; /* empty is ok; it means "HEAD" */
fcd30b13 555 else if (llen == GIT_SHA1_HEXSZ && !get_oid_hex(rs[i].src, &unused))
6e7b66ee 556 rs[i].exact_sha1 = 1; /* ok */
def24991
JH
557 else if (!check_refname_format(rs[i].src, flags))
558 ; /* valid looking ref is ok */
559 else
8d9c5010 560 goto invalid;
def24991 561 /* RHS */
8d9c5010 562 if (!rs[i].dst)
def24991 563 ; /* missing is ok; it is the same as empty */
8d9c5010 564 else if (!*rs[i].dst)
def24991
JH
565 ; /* empty is ok; it means "do not store" */
566 else if (!check_refname_format(rs[i].dst, flags))
567 ; /* valid looking ref is ok */
568 else
8d9c5010 569 goto invalid;
46220ca1
JH
570 } else {
571 /*
572 * LHS
573 * - empty is allowed; it means delete.
574 * - when wildcarded, it must be a valid looking ref.
575 * - otherwise, it must be an extended SHA-1, but
576 * there is no existing way to validate this.
577 */
578 if (!*rs[i].src)
579 ; /* empty is ok */
580 else if (is_glob) {
8d9c5010 581 if (check_refname_format(rs[i].src, flags))
46220ca1
JH
582 goto invalid;
583 }
584 else
585 ; /* anything goes, for now */
586 /*
587 * RHS
588 * - missing is allowed, but LHS then must be a
589 * valid looking ref.
590 * - empty is not allowed.
591 * - otherwise it must be a valid looking ref.
592 */
593 if (!rs[i].dst) {
8d9c5010 594 if (check_refname_format(rs[i].src, flags))
46220ca1
JH
595 goto invalid;
596 } else if (!*rs[i].dst) {
597 goto invalid;
598 } else {
8d9c5010 599 if (check_refname_format(rs[i].dst, flags))
46220ca1
JH
600 goto invalid;
601 }
ef00d150 602 }
6b62816c
DB
603 }
604 return rs;
46220ca1
JH
605
606 invalid:
24b6177e 607 if (verify) {
2cb1f36d
BC
608 /*
609 * nr_refspec must be greater than zero and i must be valid
610 * since it is only possible to reach this point from within
611 * the for loop above.
612 */
613 free_refspecs(rs, i+1);
24b6177e
JF
614 return NULL;
615 }
46220ca1
JH
616 die("Invalid refspec '%s'", refspec[i]);
617}
618
24b6177e
JF
619int valid_fetch_refspec(const char *fetch_refspec_str)
620{
24b6177e
JF
621 struct refspec *refspec;
622
66dbfd55 623 refspec = parse_refspec_internal(1, &fetch_refspec_str, 1, 1);
2cb1f36d 624 free_refspecs(refspec, 1);
24b6177e
JF
625 return !!refspec;
626}
627
46220ca1
JH
628struct refspec *parse_fetch_refspec(int nr_refspec, const char **refspec)
629{
24b6177e 630 return parse_refspec_internal(nr_refspec, refspec, 1, 0);
46220ca1
JH
631}
632
c19ae47a 633struct refspec *parse_push_refspec(int nr_refspec, const char **refspec)
46220ca1 634{
24b6177e 635 return parse_refspec_internal(nr_refspec, refspec, 0, 0);
6b62816c
DB
636}
637
72ff8943
DB
638void free_refspec(int nr_refspec, struct refspec *refspec)
639{
640 int i;
641 for (i = 0; i < nr_refspec; i++) {
642 free(refspec[i].src);
643 free(refspec[i].dst);
644 }
645 free(refspec);
646}
647
df93e33c
DB
648static int valid_remote_nick(const char *name)
649{
8ca12c0d 650 if (!name[0] || is_dot_or_dotdot(name))
df93e33c
DB
651 return 0;
652 return !strchr(name, '/'); /* no slash */
653}
654
f052154d
JK
655const char *remote_for_branch(struct branch *branch, int *explicit)
656{
657 if (branch && branch->remote_name) {
658 if (explicit)
659 *explicit = 1;
660 return branch->remote_name;
661 }
662 if (explicit)
663 *explicit = 0;
664 return "origin";
665}
666
da66b274
JK
667const char *pushremote_for_branch(struct branch *branch, int *explicit)
668{
669 if (branch && branch->pushremote_name) {
670 if (explicit)
671 *explicit = 1;
672 return branch->pushremote_name;
673 }
674 if (pushremote_name) {
675 if (explicit)
676 *explicit = 1;
677 return pushremote_name;
678 }
679 return remote_for_branch(branch, explicit);
680}
681
682static struct remote *remote_get_1(const char *name,
683 const char *(*get_default)(struct branch *, int *))
5751f490
DB
684{
685 struct remote *ret;
fa685bdf 686 int name_given = 0;
5751f490 687
8770e6fb
JK
688 read_config();
689
fa685bdf
DB
690 if (name)
691 name_given = 1;
da66b274
JK
692 else
693 name = get_default(current_branch, &name_given);
9326d494 694
5751f490 695 ret = make_remote(name, 0);
4539c218 696 if (valid_remote_nick(name) && have_git_dir()) {
0a4da29d 697 if (!valid_remote(ret))
5751f490 698 read_remotes_file(ret);
0a4da29d 699 if (!valid_remote(ret))
5751f490
DB
700 read_branches_file(ret);
701 }
0a4da29d 702 if (name_given && !valid_remote(ret))
55029ae4 703 add_url_alias(ret, name);
0a4da29d 704 if (!valid_remote(ret))
5751f490 705 return NULL;
46220ca1
JH
706 ret->fetch = parse_fetch_refspec(ret->fetch_refspec_nr, ret->fetch_refspec);
707 ret->push = parse_push_refspec(ret->push_refspec_nr, ret->push_refspec);
5751f490
DB
708 return ret;
709}
6b62816c 710
f24f715e
RR
711struct remote *remote_get(const char *name)
712{
da66b274 713 return remote_get_1(name, remote_for_branch);
f24f715e
RR
714}
715
716struct remote *pushremote_get(const char *name)
717{
da66b274 718 return remote_get_1(name, pushremote_for_branch);
f24f715e
RR
719}
720
e459b073 721int remote_is_configured(struct remote *remote, int in_repo)
9a23ba33 722{
e459b073
JS
723 if (!remote)
724 return 0;
725 if (in_repo)
726 return remote->configured_in_repo;
727 return !!remote->origin;
9a23ba33
FAG
728}
729
b42f6927
JS
730int for_each_remote(each_remote_fn fn, void *priv)
731{
732 int i, result = 0;
733 read_config();
2d31347b 734 for (i = 0; i < remotes_nr && !result; i++) {
b42f6927
JS
735 struct remote *r = remotes[i];
736 if (!r)
737 continue;
738 if (!r->fetch)
46220ca1
JH
739 r->fetch = parse_fetch_refspec(r->fetch_refspec_nr,
740 r->fetch_refspec);
b42f6927 741 if (!r->push)
46220ca1
JH
742 r->push = parse_push_refspec(r->push_refspec_nr,
743 r->push_refspec);
b42f6927
JS
744 result = fn(r, priv);
745 }
746 return result;
747}
748
df02ebda
MH
749static void handle_duplicate(struct ref *ref1, struct ref *ref2)
750{
f096e6e8
MH
751 if (strcmp(ref1->name, ref2->name)) {
752 if (ref1->fetch_head_status != FETCH_HEAD_IGNORE &&
753 ref2->fetch_head_status != FETCH_HEAD_IGNORE) {
754 die(_("Cannot fetch both %s and %s to %s"),
755 ref1->name, ref2->name, ref2->peer_ref->name);
756 } else if (ref1->fetch_head_status != FETCH_HEAD_IGNORE &&
757 ref2->fetch_head_status == FETCH_HEAD_IGNORE) {
758 warning(_("%s usually tracks %s, not %s"),
759 ref2->peer_ref->name, ref2->name, ref1->name);
760 } else if (ref1->fetch_head_status == FETCH_HEAD_IGNORE &&
761 ref2->fetch_head_status == FETCH_HEAD_IGNORE) {
762 die(_("%s tracks both %s and %s"),
763 ref2->peer_ref->name, ref1->name, ref2->name);
764 } else {
765 /*
766 * This last possibility doesn't occur because
767 * FETCH_HEAD_IGNORE entries always appear at
768 * the end of the list.
769 */
770 die(_("Internal error"));
771 }
772 }
df02ebda
MH
773 free(ref2->peer_ref);
774 free(ref2);
775}
776
b9afe665 777struct ref *ref_remove_duplicates(struct ref *ref_map)
2467a4fa 778{
183113a5 779 struct string_list refs = STRING_LIST_INIT_NODUP;
b9afe665
MH
780 struct ref *retval = NULL;
781 struct ref **p = &retval;
73cf0822 782
b9afe665
MH
783 while (ref_map) {
784 struct ref *ref = ref_map;
785
786 ref_map = ref_map->next;
787 ref->next = NULL;
73cf0822 788
b9afe665
MH
789 if (!ref->peer_ref) {
790 *p = ref;
791 p = &ref->next;
09ea1f8e 792 } else {
b9afe665
MH
793 struct string_list_item *item =
794 string_list_insert(&refs, ref->peer_ref->name);
795
796 if (item->util) {
797 /* Entry already existed */
df02ebda 798 handle_duplicate((struct ref *)item->util, ref);
b9afe665
MH
799 } else {
800 *p = ref;
801 p = &ref->next;
802 item->util = ref;
803 }
2467a4fa
DB
804 }
805 }
b9afe665 806
73cf0822 807 string_list_clear(&refs, 0);
b9afe665 808 return retval;
2467a4fa
DB
809}
810
28b91f8a 811int remote_has_url(struct remote *remote, const char *url)
5d46c9d4
DB
812{
813 int i;
28b91f8a
SP
814 for (i = 0; i < remote->url_nr; i++) {
815 if (!strcmp(remote->url[i], url))
5d46c9d4
DB
816 return 1;
817 }
818 return 0;
819}
820
e928213f
DB
821static int match_name_with_pattern(const char *key, const char *name,
822 const char *value, char **result)
a3c84239 823{
08fbdb30
DB
824 const char *kstar = strchr(key, '*');
825 size_t klen;
abd2bde7
DB
826 size_t ksuffixlen;
827 size_t namelen;
08fbdb30
DB
828 int ret;
829 if (!kstar)
830 die("Key '%s' of pattern had no '*'", key);
831 klen = kstar - key;
abd2bde7
DB
832 ksuffixlen = strlen(kstar + 1);
833 namelen = strlen(name);
834 ret = !strncmp(name, key, klen) && namelen >= klen + ksuffixlen &&
835 !memcmp(name + namelen - ksuffixlen, kstar + 1, ksuffixlen);
e928213f 836 if (ret && value) {
07bfa575 837 struct strbuf sb = STRBUF_INIT;
08fbdb30 838 const char *vstar = strchr(value, '*');
08fbdb30
DB
839 if (!vstar)
840 die("Value '%s' of pattern has no '*'", value);
07bfa575
RS
841 strbuf_add(&sb, value, vstar - value);
842 strbuf_add(&sb, name + klen, namelen - klen - ksuffixlen);
843 strbuf_addstr(&sb, vstar + 1);
844 *result = strbuf_detach(&sb, NULL);
e928213f 845 }
a3c84239
DB
846 return ret;
847}
848
e6f63712
CMN
849static void query_refspecs_multiple(struct refspec *refs, int ref_count, struct refspec *query, struct string_list *results)
850{
851 int i;
852 int find_src = !query->src;
853
854 if (find_src && !query->dst)
855 error("query_refspecs_multiple: need either src or dst");
856
857 for (i = 0; i < ref_count; i++) {
858 struct refspec *refspec = &refs[i];
859 const char *key = find_src ? refspec->dst : refspec->src;
860 const char *value = find_src ? refspec->src : refspec->dst;
861 const char *needle = find_src ? query->dst : query->src;
862 char **result = find_src ? &query->src : &query->dst;
863
864 if (!refspec->dst)
865 continue;
866 if (refspec->pattern) {
867 if (match_name_with_pattern(key, needle, value, result))
868 string_list_append_nodup(results, *result);
869 } else if (!strcmp(needle, key)) {
870 string_list_append(results, value);
871 }
872 }
873}
874
ca02465b 875int query_refspecs(struct refspec *refs, int ref_count, struct refspec *query)
72ff8943
DB
876{
877 int i;
c500352e 878 int find_src = !query->src;
049bff8f
MH
879 const char *needle = find_src ? query->dst : query->src;
880 char **result = find_src ? &query->src : &query->dst;
72ff8943 881
c500352e
CMN
882 if (find_src && !query->dst)
883 return error("query_refspecs: need either src or dst");
b42f6927 884
c500352e
CMN
885 for (i = 0; i < ref_count; i++) {
886 struct refspec *refspec = &refs[i];
887 const char *key = find_src ? refspec->dst : refspec->src;
888 const char *value = find_src ? refspec->src : refspec->dst;
b42f6927 889
c500352e 890 if (!refspec->dst)
5d46c9d4 891 continue;
c500352e 892 if (refspec->pattern) {
e928213f 893 if (match_name_with_pattern(key, needle, value, result)) {
c500352e 894 query->force = refspec->force;
5d46c9d4
DB
895 return 0;
896 }
b42f6927
JS
897 } else if (!strcmp(needle, key)) {
898 *result = xstrdup(value);
c500352e 899 query->force = refspec->force;
b42f6927 900 return 0;
5d46c9d4
DB
901 }
902 }
5d46c9d4
DB
903 return -1;
904}
905
c500352e
CMN
906char *apply_refspecs(struct refspec *refspecs, int nr_refspec,
907 const char *name)
908{
909 struct refspec query;
910
911 memset(&query, 0, sizeof(struct refspec));
912 query.src = (char *)name;
913
914 if (query_refspecs(refspecs, nr_refspec, &query))
915 return NULL;
916
917 return query.dst;
918}
919
920int remote_find_tracking(struct remote *remote, struct refspec *refspec)
921{
922 return query_refspecs(remote->fetch, remote->fetch_refspec_nr, refspec);
923}
924
8009768e
RS
925static struct ref *alloc_ref_with_prefix(const char *prefix, size_t prefixlen,
926 const char *name)
927{
928 size_t len = strlen(name);
50a6c8ef 929 struct ref *ref = xcalloc(1, st_add4(sizeof(*ref), prefixlen, len, 1));
8009768e
RS
930 memcpy(ref->name, prefix, prefixlen);
931 memcpy(ref->name + prefixlen, name, len);
932 return ref;
933}
934
59c69c0c 935struct ref *alloc_ref(const char *name)
dfd255dd 936{
59c69c0c 937 return alloc_ref_with_prefix("", 0, name);
737922aa
KK
938}
939
59a57757 940struct ref *copy_ref(const struct ref *ref)
d71ab174 941{
7b3db095
JS
942 struct ref *cpy;
943 size_t len;
944 if (!ref)
945 return NULL;
50a6c8ef
JK
946 len = st_add3(sizeof(struct ref), strlen(ref->name), 1);
947 cpy = xmalloc(len);
948 memcpy(cpy, ref, len);
7b3db095 949 cpy->next = NULL;
8c53f071
JK
950 cpy->symref = xstrdup_or_null(ref->symref);
951 cpy->remote_status = xstrdup_or_null(ref->remote_status);
7b3db095
JS
952 cpy->peer_ref = copy_ref(ref->peer_ref);
953 return cpy;
d71ab174
DB
954}
955
4577370e
DB
956struct ref *copy_ref_list(const struct ref *ref)
957{
958 struct ref *ret = NULL;
959 struct ref **tail = &ret;
960 while (ref) {
961 *tail = copy_ref(ref);
962 ref = ref->next;
963 tail = &((*tail)->next);
964 }
965 return ret;
966}
967
697d7f5d 968static void free_ref(struct ref *ref)
be885d96
DB
969{
970 if (!ref)
971 return;
7b3db095 972 free_ref(ref->peer_ref);
be885d96
DB
973 free(ref->remote_status);
974 free(ref->symref);
975 free(ref);
976}
977
dfd255dd
DB
978void free_refs(struct ref *ref)
979{
980 struct ref *next;
981 while (ref) {
982 next = ref->next;
be885d96 983 free_ref(ref);
dfd255dd
DB
984 ref = next;
985 }
986}
987
ed81c76b
JK
988int ref_compare_name(const void *va, const void *vb)
989{
990 const struct ref *a = va, *b = vb;
991 return strcmp(a->name, b->name);
992}
993
994static void *ref_list_get_next(const void *a)
995{
996 return ((const struct ref *)a)->next;
997}
998
999static void ref_list_set_next(void *a, void *next)
1000{
1001 ((struct ref *)a)->next = next;
1002}
1003
1004void sort_ref_list(struct ref **l, int (*cmp)(const void *, const void *))
1005{
1006 *l = llist_mergesort(*l, ref_list_get_next, ref_list_set_next, cmp);
1007}
1008
ca02465b
JH
1009int count_refspec_match(const char *pattern,
1010 struct ref *refs,
1011 struct ref **matched_ref)
6b62816c
DB
1012{
1013 int patlen = strlen(pattern);
1014 struct ref *matched_weak = NULL;
1015 struct ref *matched = NULL;
1016 int weak_match = 0;
1017 int match = 0;
1018
1019 for (weak_match = match = 0; refs; refs = refs->next) {
1020 char *name = refs->name;
1021 int namelen = strlen(name);
6b62816c 1022
54457fe5 1023 if (!refname_match(pattern, name))
6b62816c
DB
1024 continue;
1025
1026 /* A match is "weak" if it is with refs outside
1027 * heads or tags, and did not specify the pattern
1028 * in full (e.g. "refs/remotes/origin/master") or at
1029 * least from the toplevel (e.g. "remotes/origin/master");
1030 * otherwise "git push $URL master" would result in
1031 * ambiguity between remotes/origin/master and heads/master
1032 * at the remote site.
1033 */
1034 if (namelen != patlen &&
1035 patlen != namelen - 5 &&
59556548
CC
1036 !starts_with(name, "refs/heads/") &&
1037 !starts_with(name, "refs/tags/")) {
6b62816c
DB
1038 /* We want to catch the case where only weak
1039 * matches are found and there are multiple
1040 * matches, and where more than one strong
1041 * matches are found, as ambiguous. One
1042 * strong match with zero or more weak matches
1043 * are acceptable as a unique match.
1044 */
1045 matched_weak = refs;
1046 weak_match++;
1047 }
1048 else {
1049 matched = refs;
1050 match++;
1051 }
1052 }
1053 if (!matched) {
471fd3fe
JK
1054 if (matched_ref)
1055 *matched_ref = matched_weak;
6b62816c
DB
1056 return weak_match;
1057 }
1058 else {
471fd3fe
JK
1059 if (matched_ref)
1060 *matched_ref = matched;
6b62816c
DB
1061 return match;
1062 }
1063}
1064
1d735267 1065static void tail_link_ref(struct ref *ref, struct ref ***tail)
6b62816c
DB
1066{
1067 **tail = ref;
1d735267
DB
1068 while (ref->next)
1069 ref = ref->next;
6b62816c 1070 *tail = &ref->next;
6b62816c
DB
1071}
1072
67655246
FC
1073static struct ref *alloc_delete_ref(void)
1074{
1075 struct ref *ref = alloc_ref("(delete)");
f4e54d02 1076 oidclr(&ref->new_oid);
67655246
FC
1077 return ref;
1078}
1079
471fd3fe
JK
1080static int try_explicit_object_name(const char *name,
1081 struct ref **match)
6b62816c 1082{
fcd30b13 1083 struct object_id oid;
6b62816c 1084
471fd3fe
JK
1085 if (!*name) {
1086 if (match)
1087 *match = alloc_delete_ref();
1088 return 0;
1089 }
1090
fcd30b13 1091 if (get_sha1(name, oid.hash))
471fd3fe
JK
1092 return -1;
1093
1094 if (match) {
1095 *match = alloc_ref(name);
fcd30b13 1096 oidcpy(&(*match)->new_oid, &oid);
471fd3fe
JK
1097 }
1098 return 0;
6b62816c
DB
1099}
1100
1d735267 1101static struct ref *make_linked_ref(const char *name, struct ref ***tail)
6b62816c 1102{
59c69c0c 1103 struct ref *ret = alloc_ref(name);
1d735267
DB
1104 tail_link_ref(ret, tail);
1105 return ret;
163f0ee5 1106}
8558fd9e 1107
f8aae120
JK
1108static char *guess_ref(const char *name, struct ref *peer)
1109{
1110 struct strbuf buf = STRBUF_INIT;
fcd30b13 1111 struct object_id oid;
f8aae120 1112
7695d118 1113 const char *r = resolve_ref_unsafe(peer->name, RESOLVE_REF_READING,
fcd30b13 1114 oid.hash, NULL);
f8aae120
JK
1115 if (!r)
1116 return NULL;
1117
59556548 1118 if (starts_with(r, "refs/heads/"))
f8aae120 1119 strbuf_addstr(&buf, "refs/heads/");
59556548 1120 else if (starts_with(r, "refs/tags/"))
f8aae120
JK
1121 strbuf_addstr(&buf, "refs/tags/");
1122 else
1123 return NULL;
1124
1125 strbuf_addstr(&buf, name);
1126 return strbuf_detach(&buf, NULL);
1127}
1128
f7ade3d3
JK
1129static int match_explicit_lhs(struct ref *src,
1130 struct refspec *rs,
1131 struct ref **match,
1132 int *allocated_match)
1133{
1134 switch (count_refspec_match(rs->src, src, match)) {
1135 case 1:
471fd3fe
JK
1136 if (allocated_match)
1137 *allocated_match = 0;
f7ade3d3
JK
1138 return 0;
1139 case 0:
1140 /* The source could be in the get_sha1() format
1141 * not a reference name. :refs/other is a
1142 * way to delete 'other' ref at the remote end.
1143 */
471fd3fe 1144 if (try_explicit_object_name(rs->src, match) < 0)
f7ade3d3 1145 return error("src refspec %s does not match any.", rs->src);
471fd3fe
JK
1146 if (allocated_match)
1147 *allocated_match = 1;
f7ade3d3
JK
1148 return 0;
1149 default:
1150 return error("src refspec %s matches more than one.", rs->src);
1151 }
1152}
1153
54a8ad92
JH
1154static int match_explicit(struct ref *src, struct ref *dst,
1155 struct ref ***dst_tail,
9a7bbd1d 1156 struct refspec *rs)
6b62816c 1157{
54a8ad92 1158 struct ref *matched_src, *matched_dst;
f7ade3d3 1159 int allocated_src;
8558fd9e 1160
54a8ad92 1161 const char *dst_value = rs->dst;
f8aae120 1162 char *dst_guess;
6b62816c 1163
a83619d6 1164 if (rs->pattern || rs->matching)
9a7bbd1d 1165 return 0;
8558fd9e 1166
54a8ad92 1167 matched_src = matched_dst = NULL;
f7ade3d3
JK
1168 if (match_explicit_lhs(src, rs, &matched_src, &allocated_src) < 0)
1169 return -1;
3c8b7df1 1170
4491e62a 1171 if (!dst_value) {
fcd30b13 1172 struct object_id oid;
9f0ea7e8
DB
1173 int flag;
1174
7695d118
RS
1175 dst_value = resolve_ref_unsafe(matched_src->name,
1176 RESOLVE_REF_READING,
fcd30b13 1177 oid.hash, &flag);
9f0ea7e8
DB
1178 if (!dst_value ||
1179 ((flag & REF_ISSYMREF) &&
59556548 1180 !starts_with(dst_value, "refs/heads/")))
9f0ea7e8
DB
1181 die("%s cannot be resolved to branch.",
1182 matched_src->name);
4491e62a 1183 }
3c8b7df1 1184
54a8ad92
JH
1185 switch (count_refspec_match(dst_value, dst, &matched_dst)) {
1186 case 1:
1187 break;
1188 case 0:
50e19a83 1189 if (starts_with(dst_value, "refs/"))
1d735267 1190 matched_dst = make_linked_ref(dst_value, dst_tail);
f4e54d02 1191 else if (is_null_oid(&matched_src->new_oid))
5742c82b
JK
1192 error("unable to delete '%s': remote ref does not exist",
1193 dst_value);
eeefa7c9 1194 else if ((dst_guess = guess_ref(dst_value, matched_src)))
f8aae120 1195 matched_dst = make_linked_ref(dst_guess, dst_tail);
3c8b7df1 1196 else
f8aae120
JK
1197 error("unable to push to unqualified destination: %s\n"
1198 "The destination refspec neither matches an "
1199 "existing ref on the remote nor\n"
1200 "begins with refs/, and we are unable to "
1201 "guess a prefix based on the source ref.",
1202 dst_value);
54a8ad92
JH
1203 break;
1204 default:
3c8b7df1 1205 matched_dst = NULL;
54a8ad92
JH
1206 error("dst refspec %s matches more than one.",
1207 dst_value);
1208 break;
1209 }
9a7bbd1d
JK
1210 if (!matched_dst)
1211 return -1;
1212 if (matched_dst->peer_ref)
1213 return error("dst ref %s receives from more than one src.",
54a8ad92 1214 matched_dst->name);
54a8ad92 1215 else {
f7ade3d3
JK
1216 matched_dst->peer_ref = allocated_src ?
1217 matched_src :
1218 copy_ref(matched_src);
54a8ad92 1219 matched_dst->force = rs->force;
6b62816c 1220 }
9a7bbd1d 1221 return 0;
54a8ad92
JH
1222}
1223
1224static int match_explicit_refs(struct ref *src, struct ref *dst,
1225 struct ref ***dst_tail, struct refspec *rs,
1226 int rs_nr)
1227{
1228 int i, errs;
1229 for (i = errs = 0; i < rs_nr; i++)
9a7bbd1d
JK
1230 errs += match_explicit(src, dst, dst_tail, &rs[i]);
1231 return errs;
6b62816c
DB
1232}
1233
db70a04c 1234static char *get_ref_match(const struct refspec *rs, int rs_nr, const struct ref *ref,
6ddba5e2 1235 int send_mirror, int direction, const struct refspec **ret_pat)
8558fd9e 1236{
db70a04c
FC
1237 const struct refspec *pat;
1238 char *name;
8558fd9e 1239 int i;
a83619d6 1240 int matching_refs = -1;
8558fd9e 1241 for (i = 0; i < rs_nr; i++) {
a83619d6
PB
1242 if (rs[i].matching &&
1243 (matching_refs == -1 || rs[i].force)) {
1244 matching_refs = i;
1245 continue;
1246 }
1247
db70a04c
FC
1248 if (rs[i].pattern) {
1249 const char *dst_side = rs[i].dst ? rs[i].dst : rs[i].src;
6ddba5e2
FC
1250 int match;
1251 if (direction == FROM_SRC)
1252 match = match_name_with_pattern(rs[i].src, ref->name, dst_side, &name);
1253 else
1254 match = match_name_with_pattern(dst_side, ref->name, rs[i].src, &name);
1255 if (match) {
db70a04c
FC
1256 matching_refs = i;
1257 break;
1258 }
1259 }
8558fd9e 1260 }
db70a04c 1261 if (matching_refs == -1)
a83619d6 1262 return NULL;
db70a04c
FC
1263
1264 pat = rs + matching_refs;
1265 if (pat->matching) {
1266 /*
1267 * "matching refs"; traditionally we pushed everything
1268 * including refs outside refs/heads/ hierarchy, but
1269 * that does not make much sense these days.
1270 */
59556548 1271 if (!send_mirror && !starts_with(ref->name, "refs/heads/"))
db70a04c
FC
1272 return NULL;
1273 name = xstrdup(ref->name);
1274 }
1275 if (ret_pat)
1276 *ret_pat = pat;
1277 return name;
8558fd9e
DB
1278}
1279
6d2bf96e
CB
1280static struct ref **tail_ref(struct ref **head)
1281{
1282 struct ref **tail = head;
1283 while (*tail)
1284 tail = &((*tail)->next);
1285 return tail;
1286}
1287
c2aba155
JH
1288struct tips {
1289 struct commit **tip;
1290 int nr, alloc;
1291};
1292
fcd30b13 1293static void add_to_tips(struct tips *tips, const struct object_id *oid)
c2aba155
JH
1294{
1295 struct commit *commit;
1296
fcd30b13 1297 if (is_null_oid(oid))
c2aba155 1298 return;
bc83266a 1299 commit = lookup_commit_reference_gently(oid, 1);
c2aba155
JH
1300 if (!commit || (commit->object.flags & TMP_MARK))
1301 return;
1302 commit->object.flags |= TMP_MARK;
1303 ALLOC_GROW(tips->tip, tips->nr + 1, tips->alloc);
1304 tips->tip[tips->nr++] = commit;
1305}
1306
1307static void add_missing_tags(struct ref *src, struct ref **dst, struct ref ***dst_tail)
1308{
1309 struct string_list dst_tag = STRING_LIST_INIT_NODUP;
1310 struct string_list src_tag = STRING_LIST_INIT_NODUP;
1311 struct string_list_item *item;
1312 struct ref *ref;
1313 struct tips sent_tips;
1314
1315 /*
1316 * Collect everything we know they would have at the end of
1317 * this push, and collect all tags they have.
1318 */
1319 memset(&sent_tips, 0, sizeof(sent_tips));
1320 for (ref = *dst; ref; ref = ref->next) {
1321 if (ref->peer_ref &&
f4e54d02 1322 !is_null_oid(&ref->peer_ref->new_oid))
fcd30b13 1323 add_to_tips(&sent_tips, &ref->peer_ref->new_oid);
c2aba155 1324 else
fcd30b13 1325 add_to_tips(&sent_tips, &ref->old_oid);
59556548 1326 if (starts_with(ref->name, "refs/tags/"))
c2aba155
JH
1327 string_list_append(&dst_tag, ref->name);
1328 }
1329 clear_commit_marks_many(sent_tips.nr, sent_tips.tip, TMP_MARK);
1330
3383e199 1331 string_list_sort(&dst_tag);
c2aba155
JH
1332
1333 /* Collect tags they do not have. */
1334 for (ref = src; ref; ref = ref->next) {
59556548 1335 if (!starts_with(ref->name, "refs/tags/"))
c2aba155
JH
1336 continue; /* not a tag */
1337 if (string_list_has_string(&dst_tag, ref->name))
1338 continue; /* they already have it */
f4e54d02 1339 if (sha1_object_info(ref->new_oid.hash, NULL) != OBJ_TAG)
c2aba155
JH
1340 continue; /* be conservative */
1341 item = string_list_append(&src_tag, ref->name);
1342 item->util = ref;
1343 }
1344 string_list_clear(&dst_tag, 0);
1345
1346 /*
1347 * At this point, src_tag lists tags that are missing from
1348 * dst, and sent_tips lists the tips we are pushing or those
1349 * that we know they already have. An element in the src_tag
1350 * that is an ancestor of any of the sent_tips needs to be
1351 * sent to the other side.
1352 */
1353 if (sent_tips.nr) {
1354 for_each_string_list_item(item, &src_tag) {
1355 struct ref *ref = item->util;
1356 struct ref *dst_ref;
1357 struct commit *commit;
1358
f4e54d02 1359 if (is_null_oid(&ref->new_oid))
c2aba155 1360 continue;
bc83266a 1361 commit = lookup_commit_reference_gently(&ref->new_oid,
1362 1);
c2aba155
JH
1363 if (!commit)
1364 /* not pushing a commit, which is not an error */
1365 continue;
1366
1367 /*
1368 * Is this tag, which they do not have, reachable from
1369 * any of the commits we are sending?
1370 */
1371 if (!in_merge_bases_many(commit, sent_tips.nr, sent_tips.tip))
1372 continue;
1373
1374 /* Add it in */
1375 dst_ref = make_linked_ref(ref->name, dst_tail);
f4e54d02 1376 oidcpy(&dst_ref->new_oid, &ref->new_oid);
c2aba155
JH
1377 dst_ref->peer_ref = copy_ref(ref);
1378 }
1379 }
1380 string_list_clear(&src_tag, 0);
1381 free(sent_tips.tip);
1382}
1383
47a59185
JH
1384struct ref *find_ref_by_name(const struct ref *list, const char *name)
1385{
1386 for ( ; list; list = list->next)
1387 if (!strcmp(list->name, name))
1388 return (struct ref *)list;
1389 return NULL;
1390}
1391
f1bd15ab
BC
1392static void prepare_ref_index(struct string_list *ref_index, struct ref *ref)
1393{
1394 for ( ; ref; ref = ref->next)
1395 string_list_append_nodup(ref_index, ref->name)->util = ref;
1396
3383e199 1397 string_list_sort(ref_index);
f1bd15ab
BC
1398}
1399
ba928c13
JK
1400/*
1401 * Given only the set of local refs, sanity-check the set of push
1402 * refspecs. We can't catch all errors that match_push_refs would,
1403 * but we can catch some errors early before even talking to the
1404 * remote side.
1405 */
1406int check_push_refs(struct ref *src, int nr_refspec, const char **refspec_names)
1407{
1408 struct refspec *refspec = parse_push_refspec(nr_refspec, refspec_names);
1409 int ret = 0;
1410 int i;
1411
1412 for (i = 0; i < nr_refspec; i++) {
1413 struct refspec *rs = refspec + i;
1414
1415 if (rs->pattern || rs->matching)
1416 continue;
1417
1418 ret |= match_explicit_lhs(src, rs, NULL, NULL);
1419 }
1420
1421 free_refspec(nr_refspec, refspec);
1422 return ret;
1423}
1424
54a8ad92 1425/*
29753cdd
JH
1426 * Given the set of refs the local repository has, the set of refs the
1427 * remote repository has, and the refspec used for push, determine
1428 * what remote refs we will update and with what value by setting
1429 * peer_ref (which object is being pushed) and force (if the push is
1430 * forced) in elements of "dst". The function may add new elements to
1431 * dst (e.g. pushing to a new branch, done in match_explicit_refs).
54a8ad92 1432 */
29753cdd
JH
1433int match_push_refs(struct ref *src, struct ref **dst,
1434 int nr_refspec, const char **refspec, int flags)
6b62816c 1435{
a83619d6 1436 struct refspec *rs;
28b9d6e5
AW
1437 int send_all = flags & MATCH_REFS_ALL;
1438 int send_mirror = flags & MATCH_REFS_MIRROR;
6ddba5e2 1439 int send_prune = flags & MATCH_REFS_PRUNE;
5f48cb95 1440 int errs;
2af202be 1441 static const char *default_refspec[] = { ":", NULL };
b1d8b1f3 1442 struct ref *ref, **dst_tail = tail_ref(dst);
f1bd15ab 1443 struct string_list dst_ref_index = STRING_LIST_INIT_NODUP;
6b62816c 1444
a83619d6
PB
1445 if (!nr_refspec) {
1446 nr_refspec = 1;
1447 refspec = default_refspec;
1448 }
1449 rs = parse_push_refspec(nr_refspec, (const char **) refspec);
6d2bf96e 1450 errs = match_explicit_refs(src, *dst, &dst_tail, rs, nr_refspec);
6b62816c
DB
1451
1452 /* pick the remainder */
b1d8b1f3 1453 for (ref = src; ref; ref = ref->next) {
f1bd15ab 1454 struct string_list_item *dst_item;
6b62816c 1455 struct ref *dst_peer;
6e66bf3c
AR
1456 const struct refspec *pat = NULL;
1457 char *dst_name;
db70a04c 1458
6ddba5e2 1459 dst_name = get_ref_match(rs, nr_refspec, ref, send_mirror, FROM_SRC, &pat);
db70a04c 1460 if (!dst_name)
a83619d6
PB
1461 continue;
1462
f1bd15ab
BC
1463 if (!dst_ref_index.nr)
1464 prepare_ref_index(&dst_ref_index, *dst);
1465
1466 dst_item = string_list_lookup(&dst_ref_index, dst_name);
1467 dst_peer = dst_item ? dst_item->util : NULL;
a83619d6
PB
1468 if (dst_peer) {
1469 if (dst_peer->peer_ref)
1470 /* We're already sending something to this ref. */
1471 goto free_name;
a83619d6
PB
1472 } else {
1473 if (pat->matching && !(send_all || send_mirror))
1474 /*
1475 * Remote doesn't have it, and we have no
1476 * explicit pattern, and we don't have
01689909 1477 * --all or --mirror.
a83619d6
PB
1478 */
1479 goto free_name;
28b9d6e5 1480
6b62816c 1481 /* Create a new one and link it */
6d2bf96e 1482 dst_peer = make_linked_ref(dst_name, &dst_tail);
f4e54d02 1483 oidcpy(&dst_peer->new_oid, &ref->new_oid);
f1bd15ab
BC
1484 string_list_insert(&dst_ref_index,
1485 dst_peer->name)->util = dst_peer;
6b62816c 1486 }
b1d8b1f3 1487 dst_peer->peer_ref = copy_ref(ref);
a83619d6 1488 dst_peer->force = pat->force;
6e66bf3c
AR
1489 free_name:
1490 free(dst_name);
6b62816c 1491 }
c2aba155 1492
f1bd15ab
BC
1493 string_list_clear(&dst_ref_index, 0);
1494
c2aba155
JH
1495 if (flags & MATCH_REFS_FOLLOW_TAGS)
1496 add_missing_tags(src, dst, &dst_tail);
1497
6ddba5e2 1498 if (send_prune) {
f1bd15ab 1499 struct string_list src_ref_index = STRING_LIST_INIT_NODUP;
6ddba5e2
FC
1500 /* check for missing refs on the remote */
1501 for (ref = *dst; ref; ref = ref->next) {
1502 char *src_name;
1503
1504 if (ref->peer_ref)
1505 /* We're already sending something to this ref. */
1506 continue;
1507
1508 src_name = get_ref_match(rs, nr_refspec, ref, send_mirror, FROM_DST, NULL);
1509 if (src_name) {
f1bd15ab
BC
1510 if (!src_ref_index.nr)
1511 prepare_ref_index(&src_ref_index, src);
1512 if (!string_list_has_string(&src_ref_index,
1513 src_name))
6ddba5e2
FC
1514 ref->peer_ref = alloc_delete_ref();
1515 free(src_name);
1516 }
1517 }
f1bd15ab 1518 string_list_clear(&src_ref_index, 0);
6ddba5e2 1519 }
5f48cb95
JS
1520 if (errs)
1521 return -1;
6b62816c
DB
1522 return 0;
1523}
cf818348 1524
20e8b465 1525void set_ref_status_for_push(struct ref *remote_refs, int send_mirror,
631b5ef2 1526 int force_update)
20e8b465
TRC
1527{
1528 struct ref *ref;
1529
1530 for (ref = remote_refs; ref; ref = ref->next) {
8c5f6f71 1531 int force_ref_update = ref->force || force_update;
631b5ef2 1532 int reject_reason = 0;
8c5f6f71 1533
20e8b465 1534 if (ref->peer_ref)
f4e54d02 1535 oidcpy(&ref->new_oid, &ref->peer_ref->new_oid);
20e8b465
TRC
1536 else if (!send_mirror)
1537 continue;
1538
f4e54d02 1539 ref->deletion = is_null_oid(&ref->new_oid);
20e8b465 1540 if (!ref->deletion &&
f4e54d02 1541 !oidcmp(&ref->old_oid, &ref->new_oid)) {
20e8b465
TRC
1542 ref->status = REF_STATUS_UPTODATE;
1543 continue;
1544 }
1545
a272b289 1546 /*
b2e93f88
AW
1547 * If the remote ref has moved and is now different
1548 * from what we expect, reject any push.
631b5ef2
JH
1549 *
1550 * It also is an error if the user told us to check
1551 * with the remote-tracking branch to find the value
1552 * to expect, but we did not have such a tracking
1553 * branch.
1554 */
1555 if (ref->expect_old_sha1) {
64ac39af 1556 if (oidcmp(&ref->old_oid, &ref->old_oid_expect))
631b5ef2 1557 reject_reason = REF_STATUS_REJECT_STALE;
b2e93f88
AW
1558 else
1559 /* If the ref isn't stale then force the update. */
1560 force_ref_update = 1;
631b5ef2
JH
1561 }
1562
1563 /*
b2e93f88
AW
1564 * If the update isn't already rejected then check
1565 * the usual "must fast-forward" rules.
631b5ef2 1566 *
256b9d70
JH
1567 * Decide whether an individual refspec A:B can be
1568 * pushed. The push will succeed if any of the
1569 * following are true:
20e8b465 1570 *
a272b289 1571 * (1) the remote reference B does not exist
20e8b465 1572 *
a272b289
CR
1573 * (2) the remote reference B is being removed (i.e.,
1574 * pushing :B where no source is specified)
20e8b465 1575 *
256b9d70
JH
1576 * (3) the destination is not under refs/tags/, and
1577 * if the old and new value is a commit, the new
1578 * is a descendant of the old.
20e8b465 1579 *
a272b289
CR
1580 * (4) it is forced using the +A:B notation, or by
1581 * passing the --force argument
20e8b465
TRC
1582 */
1583
b2e93f88 1584 if (!reject_reason && !ref->deletion && !is_null_oid(&ref->old_oid)) {
59556548 1585 if (starts_with(ref->name, "refs/tags/"))
631b5ef2 1586 reject_reason = REF_STATUS_REJECT_ALREADY_EXISTS;
f4e54d02 1587 else if (!has_object_file(&ref->old_oid))
631b5ef2 1588 reject_reason = REF_STATUS_REJECT_FETCH_FIRST;
bc83266a 1589 else if (!lookup_commit_reference_gently(&ref->old_oid, 1) ||
1590 !lookup_commit_reference_gently(&ref->new_oid, 1))
631b5ef2 1591 reject_reason = REF_STATUS_REJECT_NEEDS_FORCE;
6f3d57b6 1592 else if (!ref_newer(&ref->new_oid, &ref->old_oid))
631b5ef2 1593 reject_reason = REF_STATUS_REJECT_NONFASTFORWARD;
20e8b465 1594 }
631b5ef2
JH
1595
1596 /*
1597 * "--force" will defeat any rejection implemented
1598 * by the rules above.
1599 */
1600 if (!force_ref_update)
1601 ref->status = reject_reason;
1602 else if (reject_reason)
1603 ref->forced_update = 1;
20e8b465
TRC
1604 }
1605}
1606
05e73682
JH
1607static void set_merge(struct branch *ret)
1608{
9e3751d4 1609 struct remote *remote;
05e73682 1610 char *ref;
fcd30b13 1611 struct object_id oid;
05e73682
JH
1612 int i;
1613
ee2499fe
JK
1614 if (!ret)
1615 return; /* no branch */
1616 if (ret->merge)
1617 return; /* already run */
1618 if (!ret->remote_name || !ret->merge_nr) {
1619 /*
1620 * no merge config; let's make sure we don't confuse callers
1621 * with a non-zero merge_nr but a NULL merge
1622 */
1623 ret->merge_nr = 0;
1624 return;
1625 }
1626
9e3751d4
JK
1627 remote = remote_get(ret->remote_name);
1628
05e73682
JH
1629 ret->merge = xcalloc(ret->merge_nr, sizeof(*ret->merge));
1630 for (i = 0; i < ret->merge_nr; i++) {
1631 ret->merge[i] = xcalloc(1, sizeof(**ret->merge));
1632 ret->merge[i]->src = xstrdup(ret->merge_name[i]);
9e3751d4 1633 if (!remote_find_tracking(remote, ret->merge[i]) ||
05e73682
JH
1634 strcmp(ret->remote_name, "."))
1635 continue;
1636 if (dwim_ref(ret->merge_name[i], strlen(ret->merge_name[i]),
fcd30b13 1637 oid.hash, &ref) == 1)
05e73682
JH
1638 ret->merge[i]->dst = ref;
1639 else
1640 ret->merge[i]->dst = xstrdup(ret->merge_name[i]);
1641 }
1642}
1643
cf818348
DB
1644struct branch *branch_get(const char *name)
1645{
1646 struct branch *ret;
1647
1648 read_config();
1649 if (!name || !*name || !strcmp(name, "HEAD"))
1650 ret = current_branch;
1651 else
1652 ret = make_branch(name, 0);
ee2499fe 1653 set_merge(ret);
cf818348
DB
1654 return ret;
1655}
1656
1657int branch_has_merge_config(struct branch *branch)
1658{
1659 return branch && !!branch->merge;
1660}
1661
85682c19
SP
1662int branch_merge_matches(struct branch *branch,
1663 int i,
1664 const char *refname)
cf818348 1665{
85682c19 1666 if (!branch || i < 0 || i >= branch->merge_nr)
cf818348 1667 return 0;
54457fe5 1668 return refname_match(branch->merge[i]->src, refname);
cf818348 1669}
d71ab174 1670
060e7766 1671__attribute__((format (printf,2,3)))
3a429d0a
JK
1672static const char *error_buf(struct strbuf *err, const char *fmt, ...)
1673{
1674 if (err) {
1675 va_list ap;
1676 va_start(ap, fmt);
1677 strbuf_vaddf(err, fmt, ap);
1678 va_end(ap);
1679 }
1680 return NULL;
1681}
1682
1683const char *branch_get_upstream(struct branch *branch, struct strbuf *err)
1684{
1685 if (!branch)
1686 return error_buf(err, _("HEAD does not point to a branch"));
1ca41a19
JK
1687
1688 if (!branch->merge || !branch->merge[0]) {
1689 /*
1690 * no merge config; is it because the user didn't define any,
1691 * or because it is not a real branch, and get_branch
1692 * auto-vivified it?
1693 */
3a429d0a
JK
1694 if (!ref_exists(branch->refname))
1695 return error_buf(err, _("no such branch: '%s'"),
1696 branch->name);
1ca41a19
JK
1697 return error_buf(err,
1698 _("no upstream configured for branch '%s'"),
1699 branch->name);
1700 }
1701
1702 if (!branch->merge[0]->dst)
3a429d0a
JK
1703 return error_buf(err,
1704 _("upstream branch '%s' not stored as a remote-tracking branch"),
1705 branch->merge[0]->src);
3a429d0a 1706
a9f9f8cc
JK
1707 return branch->merge[0]->dst;
1708}
1709
e291c75a
JK
1710static const char *tracking_for_push_dest(struct remote *remote,
1711 const char *refname,
1712 struct strbuf *err)
1713{
1714 char *ret;
1715
1716 ret = apply_refspecs(remote->fetch, remote->fetch_refspec_nr, refname);
1717 if (!ret)
1718 return error_buf(err,
1719 _("push destination '%s' on remote '%s' has no local tracking branch"),
1720 refname, remote->name);
1721 return ret;
1722}
1723
1724static const char *branch_get_push_1(struct branch *branch, struct strbuf *err)
1725{
1726 struct remote *remote;
1727
e291c75a
JK
1728 remote = remote_get(pushremote_for_branch(branch, NULL));
1729 if (!remote)
1730 return error_buf(err,
1731 _("branch '%s' has no remote for pushing"),
1732 branch->name);
1733
1734 if (remote->push_refspec_nr) {
1735 char *dst;
1736 const char *ret;
1737
1738 dst = apply_refspecs(remote->push, remote->push_refspec_nr,
1739 branch->refname);
1740 if (!dst)
1741 return error_buf(err,
1742 _("push refspecs for '%s' do not include '%s'"),
1743 remote->name, branch->name);
1744
1745 ret = tracking_for_push_dest(remote, dst, err);
1746 free(dst);
1747 return ret;
1748 }
1749
1750 if (remote->mirror)
1751 return tracking_for_push_dest(remote, branch->refname, err);
1752
1753 switch (push_default) {
1754 case PUSH_DEFAULT_NOTHING:
1755 return error_buf(err, _("push has no destination (push.default is 'nothing')"));
1756
1757 case PUSH_DEFAULT_MATCHING:
1758 case PUSH_DEFAULT_CURRENT:
1759 return tracking_for_push_dest(remote, branch->refname, err);
1760
1761 case PUSH_DEFAULT_UPSTREAM:
1762 return branch_get_upstream(branch, err);
1763
1764 case PUSH_DEFAULT_UNSPECIFIED:
1765 case PUSH_DEFAULT_SIMPLE:
1766 {
1767 const char *up, *cur;
1768
1769 up = branch_get_upstream(branch, err);
1770 if (!up)
1771 return NULL;
1772 cur = tracking_for_push_dest(remote, branch->refname, err);
1773 if (!cur)
1774 return NULL;
1775 if (strcmp(cur, up))
1776 return error_buf(err,
1777 _("cannot resolve 'simple' push to a single destination"));
1778 return cur;
1779 }
1780 }
1781
1782 die("BUG: unhandled push situation");
1783}
1784
1785const char *branch_get_push(struct branch *branch, struct strbuf *err)
1786{
b10731f4
KM
1787 if (!branch)
1788 return error_buf(err, _("HEAD does not point to a branch"));
1789
e291c75a
JK
1790 if (!branch->push_tracking_ref)
1791 branch->push_tracking_ref = branch_get_push_1(branch, err);
1792 return branch->push_tracking_ref;
1793}
1794
f8fb971e
JH
1795static int ignore_symref_update(const char *refname)
1796{
fcd30b13 1797 struct object_id oid;
f8fb971e
JH
1798 int flag;
1799
fcd30b13 1800 if (!resolve_ref_unsafe(refname, 0, oid.hash, &flag))
f8fb971e
JH
1801 return 0; /* non-existing refs are OK */
1802 return (flag & REF_ISSYMREF);
1803}
1804
f166db26
MH
1805/*
1806 * Create and return a list of (struct ref) consisting of copies of
1807 * each remote_ref that matches refspec. refspec must be a pattern.
1808 * Fill in the copies' peer_ref to describe the local tracking refs to
1809 * which they map. Omit any references that would map to an existing
1810 * local symbolic ref.
1811 */
4577370e 1812static struct ref *get_expanded_map(const struct ref *remote_refs,
d71ab174
DB
1813 const struct refspec *refspec)
1814{
4577370e 1815 const struct ref *ref;
d71ab174
DB
1816 struct ref *ret = NULL;
1817 struct ref **tail = &ret;
1818
d71ab174 1819 for (ref = remote_refs; ref; ref = ref->next) {
e31a17f7
MH
1820 char *expn_name = NULL;
1821
d71ab174
DB
1822 if (strchr(ref->name, '^'))
1823 continue; /* a dereference item */
e928213f 1824 if (match_name_with_pattern(refspec->src, ref->name,
f8fb971e
JH
1825 refspec->dst, &expn_name) &&
1826 !ignore_symref_update(expn_name)) {
d71ab174 1827 struct ref *cpy = copy_ref(ref);
d71ab174 1828
e928213f 1829 cpy->peer_ref = alloc_ref(expn_name);
d71ab174
DB
1830 if (refspec->force)
1831 cpy->peer_ref->force = 1;
1832 *tail = cpy;
1833 tail = &cpy->next;
1834 }
e31a17f7 1835 free(expn_name);
d71ab174
DB
1836 }
1837
1838 return ret;
1839}
1840
4577370e 1841static const struct ref *find_ref_by_name_abbrev(const struct ref *refs, const char *name)
d71ab174 1842{
4577370e 1843 const struct ref *ref;
d71ab174 1844 for (ref = refs; ref; ref = ref->next) {
54457fe5 1845 if (refname_match(name, ref->name))
d71ab174
DB
1846 return ref;
1847 }
1848 return NULL;
1849}
1850
4577370e 1851struct ref *get_remote_ref(const struct ref *remote_refs, const char *name)
d71ab174 1852{
4577370e 1853 const struct ref *ref = find_ref_by_name_abbrev(remote_refs, name);
d71ab174
DB
1854
1855 if (!ref)
9ad7c5ae 1856 return NULL;
d71ab174
DB
1857
1858 return copy_ref(ref);
1859}
1860
1861static struct ref *get_local_ref(const char *name)
1862{
3eb96997 1863 if (!name || name[0] == '\0')
d71ab174
DB
1864 return NULL;
1865
59556548 1866 if (starts_with(name, "refs/"))
59c69c0c 1867 return alloc_ref(name);
d71ab174 1868
59556548
CC
1869 if (starts_with(name, "heads/") ||
1870 starts_with(name, "tags/") ||
1871 starts_with(name, "remotes/"))
8009768e 1872 return alloc_ref_with_prefix("refs/", 5, name);
d71ab174 1873
8009768e 1874 return alloc_ref_with_prefix("refs/heads/", 11, name);
d71ab174
DB
1875}
1876
4577370e 1877int get_fetch_map(const struct ref *remote_refs,
d71ab174 1878 const struct refspec *refspec,
9ad7c5ae
JH
1879 struct ref ***tail,
1880 int missing_ok)
d71ab174 1881{
ef00d150 1882 struct ref *ref_map, **rmp;
d71ab174
DB
1883
1884 if (refspec->pattern) {
1885 ref_map = get_expanded_map(remote_refs, refspec);
1886 } else {
9ad7c5ae
JH
1887 const char *name = refspec->src[0] ? refspec->src : "HEAD";
1888
6e7b66ee
JH
1889 if (refspec->exact_sha1) {
1890 ref_map = alloc_ref(name);
f4e54d02 1891 get_oid_hex(name, &ref_map->old_oid);
6e7b66ee
JH
1892 } else {
1893 ref_map = get_remote_ref(remote_refs, name);
1894 }
9ad7c5ae
JH
1895 if (!missing_ok && !ref_map)
1896 die("Couldn't find remote ref %s", name);
1897 if (ref_map) {
1898 ref_map->peer_ref = get_local_ref(refspec->dst);
1899 if (ref_map->peer_ref && refspec->force)
1900 ref_map->peer_ref->force = 1;
1901 }
d71ab174
DB
1902 }
1903
ef00d150
DB
1904 for (rmp = &ref_map; *rmp; ) {
1905 if ((*rmp)->peer_ref) {
59556548 1906 if (!starts_with((*rmp)->peer_ref->name, "refs/") ||
5c08c1f2 1907 check_refname_format((*rmp)->peer_ref->name, 0)) {
ef00d150
DB
1908 struct ref *ignore = *rmp;
1909 error("* Ignoring funny ref '%s' locally",
1910 (*rmp)->peer_ref->name);
1911 *rmp = (*rmp)->next;
1912 free(ignore->peer_ref);
1913 free(ignore);
1914 continue;
1915 }
1916 }
1917 rmp = &((*rmp)->next);
d71ab174
DB
1918 }
1919
8f70a765
AR
1920 if (ref_map)
1921 tail_link_ref(ref_map, tail);
d71ab174
DB
1922
1923 return 0;
1924}
be885d96
DB
1925
1926int resolve_remote_symref(struct ref *ref, struct ref *list)
1927{
1928 if (!ref->symref)
1929 return 0;
1930 for (; list; list = list->next)
1931 if (!strcmp(ref->symref, list->name)) {
f4e54d02 1932 oidcpy(&ref->old_oid, &list->old_oid);
be885d96
DB
1933 return 0;
1934 }
1935 return 1;
1936}
6d21bf96 1937
ec8452d5
JS
1938static void unmark_and_free(struct commit_list *list, unsigned int mark)
1939{
1940 while (list) {
e510ab89
RS
1941 struct commit *commit = pop_commit(&list);
1942 commit->object.flags &= ~mark;
ec8452d5
JS
1943 }
1944}
1945
6f3d57b6 1946int ref_newer(const struct object_id *new_oid, const struct object_id *old_oid)
ec8452d5
JS
1947{
1948 struct object *o;
1949 struct commit *old, *new;
1950 struct commit_list *list, *used;
1951 int found = 0;
1952
75e5c0dc
JH
1953 /*
1954 * Both new and old must be commit-ish and new is descendant of
ec8452d5
JS
1955 * old. Otherwise we require --force.
1956 */
c251c83d 1957 o = deref_tag(parse_object(old_oid), NULL, 0);
ec8452d5
JS
1958 if (!o || o->type != OBJ_COMMIT)
1959 return 0;
1960 old = (struct commit *) o;
1961
c251c83d 1962 o = deref_tag(parse_object(new_oid), NULL, 0);
ec8452d5
JS
1963 if (!o || o->type != OBJ_COMMIT)
1964 return 0;
1965 new = (struct commit *) o;
1966
1967 if (parse_commit(new) < 0)
1968 return 0;
1969
1970 used = list = NULL;
1971 commit_list_insert(new, &list);
1972 while (list) {
1973 new = pop_most_recent_commit(&list, TMP_MARK);
1974 commit_list_insert(new, &used);
1975 if (new == old) {
1976 found = 1;
1977 break;
1978 }
1979 }
1980 unmark_and_free(list, TMP_MARK);
1981 unmark_and_free(used, TMP_MARK);
1982 return found;
1983}
1984
6d21bf96 1985/*
f2e08739 1986 * Compare a branch with its upstream, and save their differences (number
979cb245
JK
1987 * of commits) in *num_ours and *num_theirs. The name of the upstream branch
1988 * (or NULL if no upstream is defined) is returned via *upstream_name, if it
1989 * is not itself NULL.
f2e08739 1990 *
979cb245
JK
1991 * Returns -1 if num_ours and num_theirs could not be filled in (e.g., no
1992 * upstream defined, or ref does not exist), 0 otherwise.
6d21bf96 1993 */
979cb245
JK
1994int stat_tracking_info(struct branch *branch, int *num_ours, int *num_theirs,
1995 const char **upstream_name)
6d21bf96 1996{
fcd30b13 1997 struct object_id oid;
6d21bf96 1998 struct commit *ours, *theirs;
6d21bf96 1999 struct rev_info revs;
0b282cc4
JK
2000 const char *base;
2001 struct argv_array argv = ARGV_ARRAY_INIT;
6d21bf96 2002
f2e08739 2003 /* Cannot stat unless we are marked to build on top of somebody else. */
3a429d0a 2004 base = branch_get_upstream(branch, NULL);
979cb245
JK
2005 if (upstream_name)
2006 *upstream_name = base;
a9f9f8cc 2007 if (!base)
979cb245 2008 return -1;
6d21bf96 2009
f2e08739 2010 /* Cannot stat if what we used to build on no longer exists */
fcd30b13 2011 if (read_ref(base, oid.hash))
f2e08739 2012 return -1;
bc83266a 2013 theirs = lookup_commit_reference(&oid);
6d21bf96 2014 if (!theirs)
f2e08739 2015 return -1;
6d21bf96 2016
fcd30b13 2017 if (read_ref(branch->refname, oid.hash))
f2e08739 2018 return -1;
bc83266a 2019 ours = lookup_commit_reference(&oid);
6d21bf96 2020 if (!ours)
f2e08739 2021 return -1;
6d21bf96
JH
2022
2023 /* are we the same? */
f2e08739
JX
2024 if (theirs == ours) {
2025 *num_theirs = *num_ours = 0;
979cb245 2026 return 0;
f2e08739 2027 }
6d21bf96 2028
8fbf879e 2029 /* Run "rev-list --left-right ours...theirs" internally... */
0b282cc4
JK
2030 argv_array_push(&argv, ""); /* ignored */
2031 argv_array_push(&argv, "--left-right");
2032 argv_array_pushf(&argv, "%s...%s",
f2fd0760 2033 oid_to_hex(&ours->object.oid),
2034 oid_to_hex(&theirs->object.oid));
0b282cc4 2035 argv_array_push(&argv, "--");
6d21bf96
JH
2036
2037 init_revisions(&revs, NULL);
0b282cc4 2038 setup_revisions(argv.argc, argv.argv, &revs, NULL);
81c3ce3c
SB
2039 if (prepare_revision_walk(&revs))
2040 die("revision walk setup failed");
6d21bf96
JH
2041
2042 /* ... and count the commits on each side. */
2043 *num_ours = 0;
2044 *num_theirs = 0;
2045 while (1) {
2046 struct commit *c = get_revision(&revs);
2047 if (!c)
2048 break;
2049 if (c->object.flags & SYMMETRIC_LEFT)
2050 (*num_ours)++;
2051 else
2052 (*num_theirs)++;
2053 }
c0234b2e
JH
2054
2055 /* clear object flags smudged by the above traversal */
2056 clear_commit_marks(ours, ALL_REV_FLAGS);
2057 clear_commit_marks(theirs, ALL_REV_FLAGS);
0b282cc4
JK
2058
2059 argv_array_clear(&argv);
979cb245 2060 return 0;
6d21bf96
JH
2061}
2062
2063/*
2064 * Return true when there is anything to report, otherwise false.
2065 */
2066int format_tracking_info(struct branch *branch, struct strbuf *sb)
2067{
f2e08739 2068 int ours, theirs;
979cb245 2069 const char *full_base;
2f50babe 2070 char *base;
f2e08739 2071 int upstream_is_gone = 0;
6d21bf96 2072
979cb245
JK
2073 if (stat_tracking_info(branch, &ours, &theirs, &full_base) < 0) {
2074 if (!full_base)
2075 return 0;
f2e08739 2076 upstream_is_gone = 1;
f2e08739 2077 }
6d21bf96 2078
979cb245 2079 base = shorten_unambiguous_ref(full_base, 0);
f2e08739
JX
2080 if (upstream_is_gone) {
2081 strbuf_addf(sb,
2082 _("Your branch is based on '%s', but the upstream is gone.\n"),
2083 base);
2084 if (advice_status_hints)
a22ae753 2085 strbuf_addstr(sb,
f2e08739 2086 _(" (use \"git branch --unset-upstream\" to fixup)\n"));
f223459b
JX
2087 } else if (!ours && !theirs) {
2088 strbuf_addf(sb,
2089 _("Your branch is up-to-date with '%s'.\n"),
2090 base);
f2e08739 2091 } else if (!theirs) {
8a5b7494
JX
2092 strbuf_addf(sb,
2093 Q_("Your branch is ahead of '%s' by %d commit.\n",
2094 "Your branch is ahead of '%s' by %d commits.\n",
f2e08739
JX
2095 ours),
2096 base, ours);
491e3075 2097 if (advice_status_hints)
a22ae753 2098 strbuf_addstr(sb,
491e3075 2099 _(" (use \"git push\" to publish your local commits)\n"));
f2e08739 2100 } else if (!ours) {
8a5b7494
JX
2101 strbuf_addf(sb,
2102 Q_("Your branch is behind '%s' by %d commit, "
2103 "and can be fast-forwarded.\n",
2104 "Your branch is behind '%s' by %d commits, "
2105 "and can be fast-forwarded.\n",
f2e08739
JX
2106 theirs),
2107 base, theirs);
491e3075 2108 if (advice_status_hints)
a22ae753 2109 strbuf_addstr(sb,
491e3075 2110 _(" (use \"git pull\" to update your local branch)\n"));
c190ced6 2111 } else {
8a5b7494
JX
2112 strbuf_addf(sb,
2113 Q_("Your branch and '%s' have diverged,\n"
2114 "and have %d and %d different commit each, "
2115 "respectively.\n",
2116 "Your branch and '%s' have diverged,\n"
2117 "and have %d and %d different commits each, "
2118 "respectively.\n",
f54bea44 2119 ours + theirs),
f2e08739 2120 base, ours, theirs);
491e3075 2121 if (advice_status_hints)
a22ae753 2122 strbuf_addstr(sb,
491e3075 2123 _(" (use \"git pull\" to merge the remote branch into yours)\n"));
c190ced6 2124 }
2f50babe 2125 free(base);
6d21bf96
JH
2126 return 1;
2127}
454e2025 2128
455ade65
MH
2129static int one_local_ref(const char *refname, const struct object_id *oid,
2130 int flag, void *cb_data)
454e2025
JS
2131{
2132 struct ref ***local_tail = cb_data;
2133 struct ref *ref;
454e2025
JS
2134
2135 /* we already know it starts with refs/ to get here */
8d9c5010 2136 if (check_refname_format(refname + 5, 0))
454e2025
JS
2137 return 0;
2138
96ffc06f 2139 ref = alloc_ref(refname);
f4e54d02 2140 oidcpy(&ref->new_oid, oid);
454e2025
JS
2141 **local_tail = ref;
2142 *local_tail = &ref->next;
2143 return 0;
2144}
2145
2146struct ref *get_local_heads(void)
2147{
55f0566f 2148 struct ref *local_refs = NULL, **local_tail = &local_refs;
2b2a5be3 2149
454e2025
JS
2150 for_each_ref(one_local_ref, &local_tail);
2151 return local_refs;
2152}
8ef51733 2153
4229f1fa
JS
2154struct ref *guess_remote_head(const struct ref *head,
2155 const struct ref *refs,
2156 int all)
8ef51733 2157{
8ef51733 2158 const struct ref *r;
4229f1fa
JS
2159 struct ref *list = NULL;
2160 struct ref **tail = &list;
8ef51733 2161
6cb4e6cc 2162 if (!head)
8ef51733
JS
2163 return NULL;
2164
fbb074c2
JK
2165 /*
2166 * Some transports support directly peeking at
2167 * where HEAD points; if that is the case, then
2168 * we don't have to guess.
2169 */
2170 if (head->symref)
2171 return copy_ref(find_ref_by_name(refs, head->symref));
2172
8ef51733 2173 /* If refs/heads/master could be right, it is. */
4229f1fa
JS
2174 if (!all) {
2175 r = find_ref_by_name(refs, "refs/heads/master");
f4e54d02 2176 if (r && !oidcmp(&r->old_oid, &head->old_oid))
4229f1fa
JS
2177 return copy_ref(r);
2178 }
8ef51733
JS
2179
2180 /* Look for another ref that points there */
4229f1fa 2181 for (r = refs; r; r = r->next) {
61adfd30 2182 if (r != head &&
59556548 2183 starts_with(r->name, "refs/heads/") &&
f4e54d02 2184 !oidcmp(&r->old_oid, &head->old_oid)) {
4229f1fa
JS
2185 *tail = copy_ref(r);
2186 tail = &((*tail)->next);
2187 if (!all)
2188 break;
2189 }
2190 }
8ef51733 2191
4229f1fa 2192 return list;
8ef51733 2193}
f2ef6075
JS
2194
2195struct stale_heads_info {
f2ef6075
JS
2196 struct string_list *ref_names;
2197 struct ref **stale_refs_tail;
ed43de6e
CMN
2198 struct refspec *refs;
2199 int ref_count;
f2ef6075
JS
2200};
2201
455ade65
MH
2202static int get_stale_heads_cb(const char *refname, const struct object_id *oid,
2203 int flags, void *cb_data)
f2ef6075
JS
2204{
2205 struct stale_heads_info *info = cb_data;
e6f63712 2206 struct string_list matches = STRING_LIST_INIT_DUP;
ed43de6e 2207 struct refspec query;
e6f63712 2208 int i, stale = 1;
ed43de6e
CMN
2209 memset(&query, 0, sizeof(struct refspec));
2210 query.dst = (char *)refname;
2211
e6f63712
CMN
2212 query_refspecs_multiple(info->refs, info->ref_count, &query, &matches);
2213 if (matches.nr == 0)
2214 goto clean_exit; /* No matches */
ed43de6e
CMN
2215
2216 /*
2217 * If we did find a suitable refspec and it's not a symref and
2218 * it's not in the list of refs that currently exist in that
e6f63712
CMN
2219 * remote, we consider it to be stale. In order to deal with
2220 * overlapping refspecs, we need to go over all of the
2221 * matching refs.
ed43de6e 2222 */
e6f63712
CMN
2223 if (flags & REF_ISSYMREF)
2224 goto clean_exit;
2225
2226 for (i = 0; stale && i < matches.nr; i++)
2227 if (string_list_has_string(info->ref_names, matches.items[i].string))
2228 stale = 0;
2229
2230 if (stale) {
ed43de6e 2231 struct ref *ref = make_linked_ref(refname, &info->stale_refs_tail);
f4e54d02 2232 oidcpy(&ref->new_oid, oid);
f2ef6075 2233 }
ed43de6e 2234
e6f63712
CMN
2235clean_exit:
2236 string_list_clear(&matches, 0);
f2ef6075
JS
2237 return 0;
2238}
2239
ed43de6e 2240struct ref *get_stale_heads(struct refspec *refs, int ref_count, struct ref *fetch_map)
f2ef6075
JS
2241{
2242 struct ref *ref, *stale_refs = NULL;
183113a5 2243 struct string_list ref_names = STRING_LIST_INIT_NODUP;
f2ef6075 2244 struct stale_heads_info info;
2b2a5be3 2245
f2ef6075
JS
2246 info.ref_names = &ref_names;
2247 info.stale_refs_tail = &stale_refs;
ed43de6e
CMN
2248 info.refs = refs;
2249 info.ref_count = ref_count;
f2ef6075 2250 for (ref = fetch_map; ref; ref = ref->next)
1d2f80fa 2251 string_list_append(&ref_names, ref->name);
3383e199 2252 string_list_sort(&ref_names);
f2ef6075
JS
2253 for_each_ref(get_stale_heads_cb, &info);
2254 string_list_clear(&ref_names, 0);
2255 return stale_refs;
2256}
28f5d176
JH
2257
2258/*
2259 * Compare-and-swap
2260 */
a355b11d 2261static void clear_cas_option(struct push_cas_option *cas)
28f5d176
JH
2262{
2263 int i;
2264
2265 for (i = 0; i < cas->nr; i++)
2266 free(cas->entry[i].refname);
2267 free(cas->entry);
2268 memset(cas, 0, sizeof(*cas));
2269}
2270
2271static struct push_cas *add_cas_entry(struct push_cas_option *cas,
2272 const char *refname,
2273 size_t refnamelen)
2274{
2275 struct push_cas *entry;
2276 ALLOC_GROW(cas->entry, cas->nr + 1, cas->alloc);
2277 entry = &cas->entry[cas->nr++];
2278 memset(entry, 0, sizeof(*entry));
2279 entry->refname = xmemdupz(refname, refnamelen);
2280 return entry;
2281}
2282
8668976b 2283static int parse_push_cas_option(struct push_cas_option *cas, const char *arg, int unset)
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2284{
2285 const char *colon;
2286 struct push_cas *entry;
2287
2288 if (unset) {
2289 /* "--no-<option>" */
2290 clear_cas_option(cas);
2291 return 0;
2292 }
2293
2294 if (!arg) {
2295 /* just "--<option>" */
2296 cas->use_tracking_for_rest = 1;
2297 return 0;
2298 }
2299
2300 /* "--<option>=refname" or "--<option>=refname:value" */
2301 colon = strchrnul(arg, ':');
2302 entry = add_cas_entry(cas, arg, colon - arg);
2303 if (!*colon)
2304 entry->use_tracking = 1;
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2305 else if (!colon[1])
2306 hashclr(entry->expect);
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JH
2307 else if (get_sha1(colon + 1, entry->expect))
2308 return error("cannot parse expected object name '%s'", colon + 1);
2309 return 0;
2310}
2311
2312int parseopt_push_cas_option(const struct option *opt, const char *arg, int unset)
2313{
2314 return parse_push_cas_option(opt->value, arg, unset);
2315}
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2316
2317int is_empty_cas(const struct push_cas_option *cas)
2318{
2319 return !cas->use_tracking_for_rest && !cas->nr;
2320}
2321
2322/*
2323 * Look at remote.fetch refspec and see if we have a remote
2324 * tracking branch for the refname there. Fill its current
2325 * value in sha1[].
2326 * If we cannot do so, return negative to signal an error.
2327 */
2328static int remote_tracking(struct remote *remote, const char *refname,
fcd30b13 2329 struct object_id *oid)
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2330{
2331 char *dst;
2332
2333 dst = apply_refspecs(remote->fetch, remote->fetch_refspec_nr, refname);
2334 if (!dst)
2335 return -1; /* no tracking ref for refname at remote */
fcd30b13 2336 if (read_ref(dst, oid->hash))
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2337 return -1; /* we know what the tracking ref is but we cannot read it */
2338 return 0;
2339}
2340
2341static void apply_cas(struct push_cas_option *cas,
2342 struct remote *remote,
2343 struct ref *ref)
2344{
2345 int i;
2346
2347 /* Find an explicit --<option>=<name>[:<value>] entry */
2348 for (i = 0; i < cas->nr; i++) {
2349 struct push_cas *entry = &cas->entry[i];
54457fe5 2350 if (!refname_match(entry->refname, ref->name))
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2351 continue;
2352 ref->expect_old_sha1 = 1;
2353 if (!entry->use_tracking)
f4e54d02 2354 hashcpy(ref->old_oid_expect.hash, cas->entry[i].expect);
fcd30b13 2355 else if (remote_tracking(remote, ref->name, &ref->old_oid_expect))
64ac39af 2356 oidclr(&ref->old_oid_expect);
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JH
2357 return;
2358 }
2359
2360 /* Are we using "--<option>" to cover all? */
2361 if (!cas->use_tracking_for_rest)
2362 return;
2363
2364 ref->expect_old_sha1 = 1;
fcd30b13 2365 if (remote_tracking(remote, ref->name, &ref->old_oid_expect))
64ac39af 2366 oidclr(&ref->old_oid_expect);
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2367}
2368
2369void apply_push_cas(struct push_cas_option *cas,
2370 struct remote *remote,
2371 struct ref *remote_refs)
2372{
2373 struct ref *ref;
2374 for (ref = remote_refs; ref; ref = ref->next)
2375 apply_cas(cas, remote, ref);
2376}